fix missing IP checksum in icmp/udp deliver_reply, fix udp output_queue->input_queue

src/icmp_proxy.c

@@ -243,6 +243,10 @@ int icmp_proxy_deliver_reply(struct UTUN_INSTANCE* inst,
     memcpy(pkt + 12, &src_ip, 4);
     memcpy(pkt + 16, &dst_ip, 4);
 
+    {   uint32_t ip_sum = 0; for (int i = 0; i < 10; i++) { uint16_t w; memcpy(&w, pkt + i*2, 2); ip_sum += w; }
+        ip_sum = (ip_sum & 0xFFFF) + (ip_sum >> 16); ip_sum += (ip_sum >> 16);
+        uint16_t cs = (uint16_t)(~ip_sum); memcpy(pkt + 10, &cs, 2); }
+
     struct icmp* icmp_hdr = (struct icmp*)(pkt + 20);
     icmp_hdr->icmp_type = ICMP_ECHOREPLY; icmp_hdr->icmp_code = 0;
     icmp_hdr->icmp_id = echo_id; icmp_hdr->icmp_seq = echo_seq;

src/lwip/FILES

@@ -0,0 +1,15 @@
+api/      - The code for the high-level wrapper API. Not needed if
+            you use the lowel-level call-back/raw API.
+
+apps/     - Higher layer applications that are specifically programmed
+            with the lwIP low-level raw API.
+
+core/     - The core of the TPC/IP stack; protocol implementations,
+            memory and buffer management, and the low-level raw API.
+
+include/  - lwIP include files.
+
+netif/    - Generic network interface device drivers are kept here.
+
+For more information on the various subdirectories, check the FILES
+file in each directory.

src/lwip/Filelists.cmake

@@ -0,0 +1,293 @@
+# This file is indended to be included in end-user CMakeLists.txt
+# include(/path/to/Filelists.cmake)
+# It assumes the variable LWIP_DIR is defined pointing to the
+# root path of lwIP sources.
+#
+# This file is NOT designed (on purpose) to be used as cmake
+# subdir via add_subdirectory()
+# The intention is to provide greater flexibility to users to
+# create their own targets using the *_SRCS variables.
+
+if(NOT ${CMAKE_VERSION} VERSION_LESS "3.10.0")
+    include_guard(GLOBAL)
+endif()
+
+set(LWIP_VERSION_MAJOR    "2")
+set(LWIP_VERSION_MINOR    "2")
+set(LWIP_VERSION_REVISION "0")
+# LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases
+# LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions
+# Numbers 1..31 are reserved for release candidates
+set(LWIP_VERSION_RC       "LWIP_RC_RELEASE")
+
+if ("${LWIP_VERSION_RC}" STREQUAL "LWIP_RC_RELEASE")
+    set(LWIP_VERSION_STRING
+        "${LWIP_VERSION_MAJOR}.${LWIP_VERSION_MINOR}.${LWIP_VERSION_REVISION}"
+    )
+elseif ("${LWIP_VERSION_RC}" STREQUAL "LWIP_RC_DEVELOPMENT")
+    set(LWIP_VERSION_STRING
+        "${LWIP_VERSION_MAJOR}.${LWIP_VERSION_MINOR}.${LWIP_VERSION_REVISION}.dev"
+    )
+else()
+    set(LWIP_VERSION_STRING
+        "${LWIP_VERSION_MAJOR}.${LWIP_VERSION_MINOR}.${LWIP_VERSION_REVISION}.rc${LWIP_VERSION_RC}"
+    )
+endif()
+
+# The minimum set of files needed for lwIP.
+set(lwipcore_SRCS
+    ${LWIP_DIR}/src/core/init.c
+    ${LWIP_DIR}/src/core/def.c
+    ${LWIP_DIR}/src/core/dns.c
+    ${LWIP_DIR}/src/core/inet_chksum.c
+    ${LWIP_DIR}/src/core/ip.c
+    ${LWIP_DIR}/src/core/mem.c
+    ${LWIP_DIR}/src/core/memp.c
+    ${LWIP_DIR}/src/core/netif.c
+    ${LWIP_DIR}/src/core/pbuf.c
+    ${LWIP_DIR}/src/core/raw.c
+    ${LWIP_DIR}/src/core/stats.c
+    ${LWIP_DIR}/src/core/sys.c
+    ${LWIP_DIR}/src/core/altcp.c
+    ${LWIP_DIR}/src/core/altcp_alloc.c
+    ${LWIP_DIR}/src/core/altcp_tcp.c
+    ${LWIP_DIR}/src/core/tcp.c
+    ${LWIP_DIR}/src/core/tcp_in.c
+    ${LWIP_DIR}/src/core/tcp_out.c
+    ${LWIP_DIR}/src/core/timeouts.c
+    ${LWIP_DIR}/src/core/udp.c
+)
+set(lwipcore4_SRCS
+    ${LWIP_DIR}/src/core/ipv4/acd.c
+    ${LWIP_DIR}/src/core/ipv4/autoip.c
+    ${LWIP_DIR}/src/core/ipv4/dhcp.c
+    ${LWIP_DIR}/src/core/ipv4/etharp.c
+    ${LWIP_DIR}/src/core/ipv4/icmp.c
+    ${LWIP_DIR}/src/core/ipv4/igmp.c
+    ${LWIP_DIR}/src/core/ipv4/ip4_frag.c
+    ${LWIP_DIR}/src/core/ipv4/ip4.c
+    ${LWIP_DIR}/src/core/ipv4/ip4_addr.c
+)
+set(lwipcore6_SRCS
+    ${LWIP_DIR}/src/core/ipv6/dhcp6.c
+    ${LWIP_DIR}/src/core/ipv6/ethip6.c
+    ${LWIP_DIR}/src/core/ipv6/icmp6.c
+    ${LWIP_DIR}/src/core/ipv6/inet6.c
+    ${LWIP_DIR}/src/core/ipv6/ip6.c
+    ${LWIP_DIR}/src/core/ipv6/ip6_addr.c
+    ${LWIP_DIR}/src/core/ipv6/ip6_frag.c
+    ${LWIP_DIR}/src/core/ipv6/mld6.c
+    ${LWIP_DIR}/src/core/ipv6/nd6.c
+)
+
+# APIFILES: The files which implement the sequential and socket APIs.
+set(lwipapi_SRCS
+    ${LWIP_DIR}/src/api/api_lib.c
+    ${LWIP_DIR}/src/api/api_msg.c
+    ${LWIP_DIR}/src/api/err.c
+    ${LWIP_DIR}/src/api/if_api.c
+    ${LWIP_DIR}/src/api/netbuf.c
+    ${LWIP_DIR}/src/api/netdb.c
+    ${LWIP_DIR}/src/api/netifapi.c
+    ${LWIP_DIR}/src/api/sockets.c
+    ${LWIP_DIR}/src/api/tcpip.c
+)
+
+# Files implementing various generic network interface functions
+set(lwipnetif_SRCS
+    ${LWIP_DIR}/src/netif/ethernet.c
+    ${LWIP_DIR}/src/netif/bridgeif.c
+    ${LWIP_DIR}/src/netif/bridgeif_fdb.c
+)
+
+if (NOT ${LWIP_EXCLUDE_SLIPIF})
+	list(APPEND lwipnetif_SRCS ${LWIP_DIR}/src/netif/slipif.c)
+endif()
+
+# 6LoWPAN
+set(lwipsixlowpan_SRCS
+    ${LWIP_DIR}/src/netif/lowpan6_common.c
+    ${LWIP_DIR}/src/netif/lowpan6.c
+    ${LWIP_DIR}/src/netif/lowpan6_ble.c
+    ${LWIP_DIR}/src/netif/zepif.c
+)
+
+# PPP
+set(lwipppp_SRCS
+    ${LWIP_DIR}/src/netif/ppp/auth.c
+    ${LWIP_DIR}/src/netif/ppp/ccp.c
+    ${LWIP_DIR}/src/netif/ppp/chap-md5.c
+    ${LWIP_DIR}/src/netif/ppp/chap_ms.c
+    ${LWIP_DIR}/src/netif/ppp/chap-new.c
+    ${LWIP_DIR}/src/netif/ppp/demand.c
+    ${LWIP_DIR}/src/netif/ppp/eap.c
+    ${LWIP_DIR}/src/netif/ppp/ecp.c
+    ${LWIP_DIR}/src/netif/ppp/eui64.c
+    ${LWIP_DIR}/src/netif/ppp/fsm.c
+    ${LWIP_DIR}/src/netif/ppp/ipcp.c
+    ${LWIP_DIR}/src/netif/ppp/ipv6cp.c
+    ${LWIP_DIR}/src/netif/ppp/lcp.c
+    ${LWIP_DIR}/src/netif/ppp/magic.c
+    ${LWIP_DIR}/src/netif/ppp/mppe.c
+    ${LWIP_DIR}/src/netif/ppp/multilink.c
+    ${LWIP_DIR}/src/netif/ppp/ppp.c
+    ${LWIP_DIR}/src/netif/ppp/pppapi.c
+    ${LWIP_DIR}/src/netif/ppp/pppcrypt.c
+    ${LWIP_DIR}/src/netif/ppp/pppoe.c
+    ${LWIP_DIR}/src/netif/ppp/pppol2tp.c
+    ${LWIP_DIR}/src/netif/ppp/pppos.c
+    ${LWIP_DIR}/src/netif/ppp/upap.c
+    ${LWIP_DIR}/src/netif/ppp/utils.c
+    ${LWIP_DIR}/src/netif/ppp/vj.c
+    ${LWIP_DIR}/src/netif/ppp/polarssl/arc4.c
+    ${LWIP_DIR}/src/netif/ppp/polarssl/des.c
+    ${LWIP_DIR}/src/netif/ppp/polarssl/md4.c
+    ${LWIP_DIR}/src/netif/ppp/polarssl/md5.c
+    ${LWIP_DIR}/src/netif/ppp/polarssl/sha1.c
+)
+
+# SNMPv3 agent
+set(lwipsnmp_SRCS
+    ${LWIP_DIR}/src/apps/snmp/snmp_asn1.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_core.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2_icmp.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2_interfaces.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2_ip.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2_snmp.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2_system.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2_tcp.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_mib2_udp.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_snmpv2_framework.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_snmpv2_usm.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_msg.c
+    ${LWIP_DIR}/src/apps/snmp/snmpv3.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_netconn.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_pbuf_stream.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_raw.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_scalar.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_table.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_threadsync.c
+    ${LWIP_DIR}/src/apps/snmp/snmp_traps.c
+)
+
+# HTTP server + client
+set(lwiphttp_SRCS
+    ${LWIP_DIR}/src/apps/http/altcp_proxyconnect.c
+    ${LWIP_DIR}/src/apps/http/fs.c
+    ${LWIP_DIR}/src/apps/http/http_client.c
+    ${LWIP_DIR}/src/apps/http/httpd.c
+)
+
+# MAKEFSDATA HTTP server host utility
+set(lwipmakefsdata_SRCS
+    ${LWIP_DIR}/src/apps/http/makefsdata/makefsdata.c
+)
+
+# IPERF server
+set(lwipiperf_SRCS
+    ${LWIP_DIR}/src/apps/lwiperf/lwiperf.c
+)
+
+# SMTP client
+set(lwipsmtp_SRCS
+    ${LWIP_DIR}/src/apps/smtp/smtp.c
+)
+
+# SNTP client
+set(lwipsntp_SRCS
+    ${LWIP_DIR}/src/apps/sntp/sntp.c
+)
+
+# MDNS responder
+set(lwipmdns_SRCS
+    ${LWIP_DIR}/src/apps/mdns/mdns.c
+    ${LWIP_DIR}/src/apps/mdns/mdns_out.c
+    ${LWIP_DIR}/src/apps/mdns/mdns_domain.c
+)
+
+# NetBIOS name server
+set(lwipnetbios_SRCS
+    ${LWIP_DIR}/src/apps/netbiosns/netbiosns.c
+)
+
+# TFTP server files
+set(lwiptftp_SRCS
+    ${LWIP_DIR}/src/apps/tftp/tftp.c
+)
+
+# MQTT client files
+set(lwipmqtt_SRCS
+    ${LWIP_DIR}/src/apps/mqtt/mqtt.c
+)
+
+# ARM MBEDTLS related files of lwIP rep
+set(lwipmbedtls_SRCS
+    ${LWIP_DIR}/src/apps/altcp_tls/altcp_tls_mbedtls.c
+    ${LWIP_DIR}/src/apps/altcp_tls/altcp_tls_mbedtls_mem.c
+    ${LWIP_DIR}/src/apps/snmp/snmpv3_mbedtls.c
+)
+
+# All LWIP files without apps
+set(lwipnoapps_SRCS
+    ${lwipcore_SRCS}
+    ${lwipcore4_SRCS}
+    ${lwipcore6_SRCS}
+    ${lwipapi_SRCS}
+    ${lwipnetif_SRCS}
+    ${lwipsixlowpan_SRCS}
+    ${lwipppp_SRCS}
+)
+
+# LWIPAPPFILES: All LWIP APPs
+set(lwipallapps_SRCS
+    ${lwipsnmp_SRCS}
+    ${lwiphttp_SRCS}
+    ${lwipiperf_SRCS}
+    ${lwipsmtp_SRCS}
+    ${lwipsntp_SRCS}
+    ${lwipmdns_SRCS}
+    ${lwipnetbios_SRCS}
+    ${lwiptftp_SRCS}
+    ${lwipmqtt_SRCS}
+)
+
+# Generate lwip/init.h (version info)
+configure_file(${LWIP_DIR}/src/include/lwip/init.h.cmake.in ${LWIP_DIR}/src/include/lwip/init.h)
+
+# Documentation
+set(DOXYGEN_DIR ${LWIP_DIR}/doc/doxygen)
+set(DOXYGEN_OUTPUT_DIR output)
+set(DOXYGEN_IN  ${LWIP_DIR}/doc/doxygen/lwip.Doxyfile.cmake.in)
+set(DOXYGEN_OUT ${LWIP_DIR}/doc/doxygen/lwip.Doxyfile)
+configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT})
+
+find_package(Doxygen)
+if (DOXYGEN_FOUND)
+    message(STATUS "Doxygen build started")
+
+    add_custom_target(lwipdocs
+        COMMAND ${CMAKE_COMMAND} -E remove_directory ${DOXYGEN_DIR}/${DOXYGEN_OUTPUT_DIR}/html
+        COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
+        WORKING_DIRECTORY ${DOXYGEN_DIR}
+        COMMENT "Generating API documentation with Doxygen"
+        VERBATIM)
+else (DOXYGEN_FOUND)
+    message(STATUS "Doxygen needs to be installed to generate the doxygen documentation")
+endif (DOXYGEN_FOUND)
+
+# lwIP libraries
+add_library(lwipcore EXCLUDE_FROM_ALL ${lwipnoapps_SRCS})
+target_compile_options(lwipcore PRIVATE ${LWIP_COMPILER_FLAGS})
+target_compile_definitions(lwipcore PRIVATE ${LWIP_DEFINITIONS}  ${LWIP_MBEDTLS_DEFINITIONS})
+target_include_directories(lwipcore PRIVATE ${LWIP_INCLUDE_DIRS} ${LWIP_MBEDTLS_INCLUDE_DIRS})
+
+add_library(lwipallapps EXCLUDE_FROM_ALL ${lwipallapps_SRCS})
+target_compile_options(lwipallapps PRIVATE ${LWIP_COMPILER_FLAGS})
+target_compile_definitions(lwipallapps PRIVATE ${LWIP_DEFINITIONS}  ${LWIP_MBEDTLS_DEFINITIONS})
+target_include_directories(lwipallapps PRIVATE ${LWIP_INCLUDE_DIRS} ${LWIP_MBEDTLS_INCLUDE_DIRS})
+
+add_library(lwipmbedtls EXCLUDE_FROM_ALL ${lwipmbedtls_SRCS})
+target_compile_options(lwipmbedtls PRIVATE ${LWIP_COMPILER_FLAGS})
+target_compile_definitions(lwipmbedtls PRIVATE ${LWIP_DEFINITIONS}  ${LWIP_MBEDTLS_DEFINITIONS})
+target_include_directories(lwipmbedtls PRIVATE ${LWIP_INCLUDE_DIRS} ${LWIP_MBEDTLS_INCLUDE_DIRS})

src/lwip/Filelists.mk

@@ -0,0 +1,208 @@
+#
+# Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+# SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+#
+# This file is part of the lwIP TCP/IP stack.
+#
+# Author: Adam Dunkels <adam@sics.se>
+#
+
+# COREFILES, CORE4FILES: The minimum set of files needed for lwIP.
+COREFILES=$(LWIPDIR)/core/init.c \
+	$(LWIPDIR)/core/def.c \
+	$(LWIPDIR)/core/dns.c \
+	$(LWIPDIR)/core/inet_chksum.c \
+	$(LWIPDIR)/core/ip.c \
+	$(LWIPDIR)/core/mem.c \
+	$(LWIPDIR)/core/memp.c \
+	$(LWIPDIR)/core/netif.c \
+	$(LWIPDIR)/core/pbuf.c \
+	$(LWIPDIR)/core/raw.c \
+	$(LWIPDIR)/core/stats.c \
+	$(LWIPDIR)/core/sys.c \
+	$(LWIPDIR)/core/altcp.c \
+	$(LWIPDIR)/core/altcp_alloc.c \
+	$(LWIPDIR)/core/altcp_tcp.c \
+	$(LWIPDIR)/core/tcp.c \
+	$(LWIPDIR)/core/tcp_in.c \
+	$(LWIPDIR)/core/tcp_out.c \
+	$(LWIPDIR)/core/timeouts.c \
+	$(LWIPDIR)/core/udp.c
+
+CORE4FILES=$(LWIPDIR)/core/ipv4/acd.c \
+	$(LWIPDIR)/core/ipv4/autoip.c \
+	$(LWIPDIR)/core/ipv4/dhcp.c \
+	$(LWIPDIR)/core/ipv4/etharp.c \
+	$(LWIPDIR)/core/ipv4/icmp.c \
+	$(LWIPDIR)/core/ipv4/igmp.c \
+	$(LWIPDIR)/core/ipv4/ip4_frag.c \
+	$(LWIPDIR)/core/ipv4/ip4.c \
+	$(LWIPDIR)/core/ipv4/ip4_addr.c
+
+CORE6FILES=$(LWIPDIR)/core/ipv6/dhcp6.c \
+	$(LWIPDIR)/core/ipv6/ethip6.c \
+	$(LWIPDIR)/core/ipv6/icmp6.c \
+	$(LWIPDIR)/core/ipv6/inet6.c \
+	$(LWIPDIR)/core/ipv6/ip6.c \
+	$(LWIPDIR)/core/ipv6/ip6_addr.c \
+	$(LWIPDIR)/core/ipv6/ip6_frag.c \
+	$(LWIPDIR)/core/ipv6/mld6.c \
+	$(LWIPDIR)/core/ipv6/nd6.c
+
+# APIFILES: The files which implement the sequential and socket APIs.
+APIFILES=$(LWIPDIR)/api/api_lib.c \
+	$(LWIPDIR)/api/api_msg.c \
+	$(LWIPDIR)/api/err.c \
+	$(LWIPDIR)/api/if_api.c \
+	$(LWIPDIR)/api/netbuf.c \
+	$(LWIPDIR)/api/netdb.c \
+	$(LWIPDIR)/api/netifapi.c \
+	$(LWIPDIR)/api/sockets.c \
+	$(LWIPDIR)/api/tcpip.c
+
+# NETIFFILES: Files implementing various generic network interface functions
+NETIFFILES=$(LWIPDIR)/netif/ethernet.c \
+	$(LWIPDIR)/netif/bridgeif.c \
+	$(LWIPDIR)/netif/bridgeif_fdb.c \
+	$(LWIPDIR)/netif/slipif.c
+
+# SIXLOWPAN: 6LoWPAN
+SIXLOWPAN=$(LWIPDIR)/netif/lowpan6_common.c \
+        $(LWIPDIR)/netif/lowpan6.c \
+	$(LWIPDIR)/netif/lowpan6_ble.c \
+	$(LWIPDIR)/netif/zepif.c
+
+# PPPFILES: PPP
+PPPFILES=$(LWIPDIR)/netif/ppp/auth.c \
+	$(LWIPDIR)/netif/ppp/ccp.c \
+	$(LWIPDIR)/netif/ppp/chap-md5.c \
+	$(LWIPDIR)/netif/ppp/chap_ms.c \
+	$(LWIPDIR)/netif/ppp/chap-new.c \
+	$(LWIPDIR)/netif/ppp/demand.c \
+	$(LWIPDIR)/netif/ppp/eap.c \
+	$(LWIPDIR)/netif/ppp/ecp.c \
+	$(LWIPDIR)/netif/ppp/eui64.c \
+	$(LWIPDIR)/netif/ppp/fsm.c \
+	$(LWIPDIR)/netif/ppp/ipcp.c \
+	$(LWIPDIR)/netif/ppp/ipv6cp.c \
+	$(LWIPDIR)/netif/ppp/lcp.c \
+	$(LWIPDIR)/netif/ppp/magic.c \
+	$(LWIPDIR)/netif/ppp/mppe.c \
+	$(LWIPDIR)/netif/ppp/multilink.c \
+	$(LWIPDIR)/netif/ppp/ppp.c \
+	$(LWIPDIR)/netif/ppp/pppapi.c \
+	$(LWIPDIR)/netif/ppp/pppcrypt.c \
+	$(LWIPDIR)/netif/ppp/pppoe.c \
+	$(LWIPDIR)/netif/ppp/pppol2tp.c \
+	$(LWIPDIR)/netif/ppp/pppos.c \
+	$(LWIPDIR)/netif/ppp/upap.c \
+	$(LWIPDIR)/netif/ppp/utils.c \
+	$(LWIPDIR)/netif/ppp/vj.c \
+	$(LWIPDIR)/netif/ppp/polarssl/arc4.c \
+	$(LWIPDIR)/netif/ppp/polarssl/des.c \
+	$(LWIPDIR)/netif/ppp/polarssl/md4.c \
+	$(LWIPDIR)/netif/ppp/polarssl/md5.c \
+	$(LWIPDIR)/netif/ppp/polarssl/sha1.c
+
+# LWIPNOAPPSFILES: All LWIP files without apps
+LWIPNOAPPSFILES=$(COREFILES) \
+	$(CORE4FILES) \
+	$(CORE6FILES) \
+	$(APIFILES) \
+	$(NETIFFILES) \
+	$(PPPFILES) \
+	$(SIXLOWPAN)
+
+# SNMPFILES: SNMPv2c agent
+SNMPFILES=$(LWIPDIR)/apps/snmp/snmp_asn1.c \
+	$(LWIPDIR)/apps/snmp/snmp_core.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2_icmp.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2_interfaces.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2_ip.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2_snmp.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2_system.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2_tcp.c \
+	$(LWIPDIR)/apps/snmp/snmp_mib2_udp.c \
+	$(LWIPDIR)/apps/snmp/snmp_snmpv2_framework.c \
+	$(LWIPDIR)/apps/snmp/snmp_snmpv2_usm.c \
+	$(LWIPDIR)/apps/snmp/snmp_msg.c \
+	$(LWIPDIR)/apps/snmp/snmpv3.c \
+	$(LWIPDIR)/apps/snmp/snmp_netconn.c \
+	$(LWIPDIR)/apps/snmp/snmp_pbuf_stream.c \
+	$(LWIPDIR)/apps/snmp/snmp_raw.c \
+	$(LWIPDIR)/apps/snmp/snmp_scalar.c \
+	$(LWIPDIR)/apps/snmp/snmp_table.c \
+	$(LWIPDIR)/apps/snmp/snmp_threadsync.c \
+	$(LWIPDIR)/apps/snmp/snmp_traps.c
+
+# HTTPFILES: HTTP server + client
+HTTPFILES=$(LWIPDIR)/apps/http/altcp_proxyconnect.c \
+	$(LWIPDIR)/apps/http/fs.c \
+	$(LWIPDIR)/apps/http/http_client.c \
+	$(LWIPDIR)/apps/http/httpd.c
+
+# MAKEFSDATA: MAKEFSDATA HTTP server host utility
+MAKEFSDATAFILES=$(LWIPDIR)/apps/http/makefsdata/makefsdata.c
+
+# LWIPERFFILES: IPERF server
+LWIPERFFILES=$(LWIPDIR)/apps/lwiperf/lwiperf.c
+
+# SMTPFILES: SMTP client
+SMTPFILES=$(LWIPDIR)/apps/smtp/smtp.c
+
+# SNTPFILES: SNTP client
+SNTPFILES=$(LWIPDIR)/apps/sntp/sntp.c
+
+# MDNSFILES: MDNS responder
+MDNSFILES=$(LWIPDIR)/apps/mdns/mdns.c \
+	$(LWIPDIR)/apps/mdns/mdns_out.c \
+	$(LWIPDIR)/apps/mdns/mdns_domain.c
+
+# NETBIOSNSFILES: NetBIOS name server
+NETBIOSNSFILES=$(LWIPDIR)/apps/netbiosns/netbiosns.c
+
+# TFTPFILES: TFTP client/server files
+TFTPFILES=$(LWIPDIR)/apps/tftp/tftp.c
+
+# MQTTFILES: MQTT client files
+MQTTFILES=$(LWIPDIR)/apps/mqtt/mqtt.c
+
+# MBEDTLS_FILES: MBEDTLS related files of lwIP rep
+MBEDTLS_FILES=$(LWIPDIR)/apps/altcp_tls/altcp_tls_mbedtls.c \
+	$(LWIPDIR)/apps/altcp_tls/altcp_tls_mbedtls_mem.c \
+	$(LWIPDIR)/apps/snmp/snmpv3_mbedtls.c
+
+# LWIPAPPFILES: All LWIP APPs
+LWIPAPPFILES=$(SNMPFILES) \
+	$(HTTPFILES) \
+	$(LWIPERFFILES) \
+	$(SMTPFILES) \
+	$(SNTPFILES) \
+	$(MDNSFILES) \
+	$(NETBIOSNSFILES) \
+	$(TFTPFILES) \
+	$(MQTTFILES) \
+	$(MBEDTLS_FILES)

src/lwip/api/err.c

@@ -0,0 +1,115 @@
+/**
+ * @file
+ * Error Management module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/err.h"
+#include "lwip/def.h"
+#include "lwip/sys.h"
+
+#include "lwip/errno.h"
+
+#if !NO_SYS
+/** Table to quickly map an lwIP error (err_t) to a socket error
+  * by using -err as an index */
+static const int err_to_errno_table[] = {
+  0,             /* ERR_OK          0      No error, everything OK. */
+  ENOMEM,        /* ERR_MEM        -1      Out of memory error.     */
+  ENOBUFS,       /* ERR_BUF        -2      Buffer error.            */
+  EWOULDBLOCK,   /* ERR_TIMEOUT    -3      Timeout                  */
+  EHOSTUNREACH,  /* ERR_RTE        -4      Routing problem.         */
+  EINPROGRESS,   /* ERR_INPROGRESS -5      Operation in progress    */
+  EINVAL,        /* ERR_VAL        -6      Illegal value.           */
+  EWOULDBLOCK,   /* ERR_WOULDBLOCK -7      Operation would block.   */
+  EADDRINUSE,    /* ERR_USE        -8      Address in use.          */
+  EALREADY,      /* ERR_ALREADY    -9      Already connecting.      */
+  EISCONN,       /* ERR_ISCONN     -10     Conn already established.*/
+  ENOTCONN,      /* ERR_CONN       -11     Not connected.           */
+  -1,            /* ERR_IF         -12     Low-level netif error    */
+  ECONNABORTED,  /* ERR_ABRT       -13     Connection aborted.      */
+  ECONNRESET,    /* ERR_RST        -14     Connection reset.        */
+  ENOTCONN,      /* ERR_CLSD       -15     Connection closed.       */
+  EIO            /* ERR_ARG        -16     Illegal argument.        */
+};
+
+int
+err_to_errno(err_t err)
+{
+  if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_to_errno_table))) {
+    return EIO;
+  }
+  return err_to_errno_table[-err];
+}
+#endif /* !NO_SYS */
+
+#ifdef LWIP_DEBUG
+
+static const char *err_strerr[] = {
+  "Ok.",                    /* ERR_OK          0  */
+  "Out of memory error.",   /* ERR_MEM        -1  */
+  "Buffer error.",          /* ERR_BUF        -2  */
+  "Timeout.",               /* ERR_TIMEOUT    -3  */
+  "Routing problem.",       /* ERR_RTE        -4  */
+  "Operation in progress.", /* ERR_INPROGRESS -5  */
+  "Illegal value.",         /* ERR_VAL        -6  */
+  "Operation would block.", /* ERR_WOULDBLOCK -7  */
+  "Address in use.",        /* ERR_USE        -8  */
+  "Already connecting.",    /* ERR_ALREADY    -9  */
+  "Already connected.",     /* ERR_ISCONN     -10 */
+  "Not connected.",         /* ERR_CONN       -11 */
+  "Low-level netif error.", /* ERR_IF         -12 */
+  "Connection aborted.",    /* ERR_ABRT       -13 */
+  "Connection reset.",      /* ERR_RST        -14 */
+  "Connection closed.",     /* ERR_CLSD       -15 */
+  "Illegal argument."       /* ERR_ARG        -16 */
+};
+
+/**
+ * Convert an lwip internal error to a string representation.
+ *
+ * @param err an lwip internal err_t
+ * @return a string representation for err
+ */
+const char *
+lwip_strerr(err_t err)
+{
+  if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_strerr))) {
+    return "Unknown error.";
+  }
+  return err_strerr[-err];
+}
+
+#endif /* LWIP_DEBUG */

src/lwip/api/if_api.c

@@ -0,0 +1,102 @@
+/**
+ * @file
+ * Interface Identification APIs from:
+ *              RFC 3493: Basic Socket Interface Extensions for IPv6
+ *                  Section 4: Interface Identification
+ *
+ * @defgroup if_api Interface Identification API
+ * @ingroup socket
+ */
+
+/*
+ * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. <joel.cunningham@garmin.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Joel Cunningham <joel.cunningham@me.com>
+ *
+ */
+#include "lwip/opt.h"
+
+#if LWIP_SOCKET
+
+#include "lwip/errno.h"
+#include "lwip/if_api.h"
+#include "lwip/netifapi.h"
+#include "lwip/priv/sockets_priv.h"
+
+/**
+ * @ingroup if_api
+ * Maps an interface index to its corresponding name.
+ * @param ifindex interface index
+ * @param ifname shall point to a buffer of at least {IF_NAMESIZE} bytes
+ * @return If ifindex is an interface index, then the function shall return the
+ * value supplied in ifname, which points to a buffer now containing the interface name.
+ * Otherwise, the function shall return a NULL pointer.
+ */
+char *
+lwip_if_indextoname(unsigned int ifindex, char *ifname)
+{
+#if LWIP_NETIF_API
+  if (ifindex <= 0xff) {
+    err_t err = netifapi_netif_index_to_name((u8_t)ifindex, ifname);
+    if (!err && ifname[0] != '\0') {
+      return ifname;
+    }
+  }
+#else /* LWIP_NETIF_API */
+  LWIP_UNUSED_ARG(ifindex);
+  LWIP_UNUSED_ARG(ifname);
+#endif /* LWIP_NETIF_API */
+  set_errno(ENXIO);
+  return NULL;
+}
+
+/**
+ * @ingroup if_api
+ * Returns the interface index corresponding to name ifname.
+ * @param ifname Interface name
+ * @return The corresponding index if ifname is the name of an interface;
+ * otherwise, zero.
+ */
+unsigned int
+lwip_if_nametoindex(const char *ifname)
+{
+#if LWIP_NETIF_API
+  err_t err;
+  u8_t idx;
+
+  err = netifapi_netif_name_to_index(ifname, &idx);
+  if (!err) {
+    return idx;
+  }
+#else /* LWIP_NETIF_API */
+  LWIP_UNUSED_ARG(ifname);
+#endif /* LWIP_NETIF_API */
+  return 0; /* invalid index */
+}
+
+#endif /* LWIP_SOCKET */

src/lwip/api/netbuf.c

@@ -0,0 +1,250 @@
+/**
+ * @file
+ * Network buffer management
+ *
+ * @defgroup netbuf Network buffers
+ * @ingroup netconn
+ * Network buffer descriptor for @ref netconn. Based on @ref pbuf internally
+ * to avoid copying data around.<br>
+ * Buffers must not be shared across multiple threads, all functions except
+ * netbuf_new() and netbuf_delete() are not thread-safe.
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netbuf.h"
+#include "lwip/memp.h"
+
+#include <string.h>
+
+/**
+ * @ingroup netbuf
+ * Create (allocate) and initialize a new netbuf.
+ * The netbuf doesn't yet contain a packet buffer!
+ *
+ * @return a pointer to a new netbuf
+ *         NULL on lack of memory
+ */
+struct
+netbuf *netbuf_new(void)
+{
+  struct netbuf *buf;
+
+  buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
+  if (buf != NULL) {
+    memset(buf, 0, sizeof(struct netbuf));
+  }
+  return buf;
+}
+
+/**
+ * @ingroup netbuf
+ * Deallocate a netbuf allocated by netbuf_new().
+ *
+ * @param buf pointer to a netbuf allocated by netbuf_new()
+ */
+void
+netbuf_delete(struct netbuf *buf)
+{
+  if (buf != NULL) {
+    if (buf->p != NULL) {
+      pbuf_free(buf->p);
+      buf->p = buf->ptr = NULL;
+    }
+    memp_free(MEMP_NETBUF, buf);
+  }
+}
+
+/**
+ * @ingroup netbuf
+ * Allocate memory for a packet buffer for a given netbuf.
+ *
+ * @param buf the netbuf for which to allocate a packet buffer
+ * @param size the size of the packet buffer to allocate
+ * @return pointer to the allocated memory
+ *         NULL if no memory could be allocated
+ */
+void *
+netbuf_alloc(struct netbuf *buf, u16_t size)
+{
+  LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;);
+
+  /* Deallocate any previously allocated memory. */
+  if (buf->p != NULL) {
+    pbuf_free(buf->p);
+  }
+  buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
+  if (buf->p == NULL) {
+    return NULL;
+  }
+  LWIP_ASSERT("check that first pbuf can hold size",
+              (buf->p->len >= size));
+  buf->ptr = buf->p;
+  return buf->p->payload;
+}
+
+/**
+ * @ingroup netbuf
+ * Free the packet buffer included in a netbuf
+ *
+ * @param buf pointer to the netbuf which contains the packet buffer to free
+ */
+void
+netbuf_free(struct netbuf *buf)
+{
+  LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
+  if (buf->p != NULL) {
+    pbuf_free(buf->p);
+  }
+  buf->p = buf->ptr = NULL;
+#if LWIP_CHECKSUM_ON_COPY
+  buf->flags = 0;
+  buf->toport_chksum = 0;
+#endif /* LWIP_CHECKSUM_ON_COPY */
+}
+
+/**
+ * @ingroup netbuf
+ * Let a netbuf reference existing (non-volatile) data.
+ *
+ * @param buf netbuf which should reference the data
+ * @param dataptr pointer to the data to reference
+ * @param size size of the data
+ * @return ERR_OK if data is referenced
+ *         ERR_MEM if data couldn't be referenced due to lack of memory
+ */
+err_t
+netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size)
+{
+  LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;);
+  if (buf->p != NULL) {
+    pbuf_free(buf->p);
+  }
+  buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
+  if (buf->p == NULL) {
+    buf->ptr = NULL;
+    return ERR_MEM;
+  }
+  ((struct pbuf_rom *)buf->p)->payload = dataptr;
+  buf->p->len = buf->p->tot_len = size;
+  buf->ptr = buf->p;
+  return ERR_OK;
+}
+
+/**
+ * @ingroup netbuf
+ * Chain one netbuf to another (@see pbuf_chain)
+ *
+ * @param head the first netbuf
+ * @param tail netbuf to chain after head, freed by this function, may not be reference after returning
+ */
+void
+netbuf_chain(struct netbuf *head, struct netbuf *tail)
+{
+  LWIP_ERROR("netbuf_chain: invalid head", (head != NULL), return;);
+  LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;);
+  pbuf_cat(head->p, tail->p);
+  head->ptr = head->p;
+  memp_free(MEMP_NETBUF, tail);
+}
+
+/**
+ * @ingroup netbuf
+ * Get the data pointer and length of the data inside a netbuf.
+ *
+ * @param buf netbuf to get the data from
+ * @param dataptr pointer to a void pointer where to store the data pointer
+ * @param len pointer to an u16_t where the length of the data is stored
+ * @return ERR_OK if the information was retrieved,
+ *         ERR_BUF on error.
+ */
+err_t
+netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
+{
+  LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;);
+  LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;);
+  LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;);
+
+  if (buf->ptr == NULL) {
+    return ERR_BUF;
+  }
+  *dataptr = buf->ptr->payload;
+  *len = buf->ptr->len;
+  return ERR_OK;
+}
+
+/**
+ * @ingroup netbuf
+ * Move the current data pointer of a packet buffer contained in a netbuf
+ * to the next part.
+ * The packet buffer itself is not modified.
+ *
+ * @param buf the netbuf to modify
+ * @return -1 if there is no next part
+ *         1  if moved to the next part but now there is no next part
+ *         0  if moved to the next part and there are still more parts
+ */
+s8_t
+netbuf_next(struct netbuf *buf)
+{
+  LWIP_ERROR("netbuf_next: invalid buf", (buf != NULL), return -1;);
+  if (buf->ptr->next == NULL) {
+    return -1;
+  }
+  buf->ptr = buf->ptr->next;
+  if (buf->ptr->next == NULL) {
+    return 1;
+  }
+  return 0;
+}
+
+/**
+ * @ingroup netbuf
+ * Move the current data pointer of a packet buffer contained in a netbuf
+ * to the beginning of the packet.
+ * The packet buffer itself is not modified.
+ *
+ * @param buf the netbuf to modify
+ */
+void
+netbuf_first(struct netbuf *buf)
+{
+  LWIP_ERROR("netbuf_first: invalid buf", (buf != NULL), return;);
+  buf->ptr = buf->p;
+}
+
+#endif /* LWIP_NETCONN */

src/lwip/api/netdb.c

@@ -0,0 +1,422 @@
+/**
+ * @file
+ * API functions for name resolving
+ *
+ * @defgroup netdbapi NETDB API
+ * @ingroup socket
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt
+ *
+ */
+
+#include "lwip/netdb.h"
+
+#if LWIP_DNS && LWIP_SOCKET
+
+#include "lwip/err.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/ip_addr.h"
+#include "lwip/api.h"
+#include "lwip/dns.h"
+
+#include <string.h> /* memset */
+#include <stdlib.h> /* atoi */
+
+/** helper struct for gethostbyname_r to access the char* buffer */
+struct gethostbyname_r_helper {
+  ip_addr_t *addr_list[2];
+  ip_addr_t addr;
+  char *aliases;
+};
+
+/** h_errno is exported in netdb.h for access by applications. */
+#if LWIP_DNS_API_DECLARE_H_ERRNO
+int h_errno;
+#endif /* LWIP_DNS_API_DECLARE_H_ERRNO */
+
+/** LWIP_DNS_API_HOSTENT_STORAGE: if set to 0 (default), lwip_gethostbyname()
+ * returns the same global variabe for all calls (in all threads).
+ * When set to 1, your port should provide a function
+ *      struct hostent* sys_thread_hostent( struct hostent* h);
+ * which have to do a copy of "h" and return a pointer ont the "per-thread"
+ * copy.
+ */
+#ifndef LWIP_DNS_API_HOSTENT_STORAGE
+#define LWIP_DNS_API_HOSTENT_STORAGE 0
+#endif
+
+/* define "hostent" variables storage */
+#if LWIP_DNS_API_HOSTENT_STORAGE
+#define HOSTENT_STORAGE
+#else
+#define HOSTENT_STORAGE static
+#endif /* LWIP_DNS_API_STATIC_HOSTENT */
+
+/**
+ * Returns an entry containing addresses of address family AF_INET
+ * for the host with name name.
+ * Due to dns_gethostbyname limitations, only one address is returned.
+ *
+ * @param name the hostname to resolve
+ * @return an entry containing addresses of address family AF_INET
+ *         for the host with name name
+ */
+struct hostent *
+lwip_gethostbyname(const char *name)
+{
+  err_t err;
+  ip_addr_t addr;
+
+  /* buffer variables for lwip_gethostbyname() */
+  HOSTENT_STORAGE struct hostent s_hostent;
+  HOSTENT_STORAGE char *s_aliases;
+  HOSTENT_STORAGE ip_addr_t s_hostent_addr;
+  HOSTENT_STORAGE ip_addr_t *s_phostent_addr[2];
+  HOSTENT_STORAGE char s_hostname[DNS_MAX_NAME_LENGTH + 1];
+
+  /* query host IP address */
+  err = netconn_gethostbyname(name, &addr);
+  if (err != ERR_OK) {
+    LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
+    h_errno = HOST_NOT_FOUND;
+    return NULL;
+  }
+
+  /* fill hostent */
+  s_hostent_addr = addr;
+  s_phostent_addr[0] = &s_hostent_addr;
+  s_phostent_addr[1] = NULL;
+  strncpy(s_hostname, name, DNS_MAX_NAME_LENGTH);
+  s_hostname[DNS_MAX_NAME_LENGTH] = 0;
+  s_hostent.h_name = s_hostname;
+  s_aliases = NULL;
+  s_hostent.h_aliases = &s_aliases;
+  s_hostent.h_addrtype = AF_INET;
+  s_hostent.h_length = sizeof(ip_addr_t);
+  s_hostent.h_addr_list = (char **)&s_phostent_addr;
+
+#if DNS_DEBUG
+  /* dump hostent */
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_name           == %s\n", s_hostent.h_name));
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases        == %p\n", (void *)s_hostent.h_aliases));
+  /* h_aliases are always empty */
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addrtype       == %d\n", s_hostent.h_addrtype));
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_length         == %d\n", s_hostent.h_length));
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list      == %p\n", (void *)s_hostent.h_addr_list));
+  if (s_hostent.h_addr_list != NULL) {
+    u8_t idx;
+    for (idx = 0; s_hostent.h_addr_list[idx]; idx++) {
+      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]-> == %s\n", idx, ipaddr_ntoa(s_phostent_addr[idx])));
+    }
+  }
+#endif /* DNS_DEBUG */
+
+#if LWIP_DNS_API_HOSTENT_STORAGE
+  /* this function should return the "per-thread" hostent after copy from s_hostent */
+  return sys_thread_hostent(&s_hostent);
+#else
+  return &s_hostent;
+#endif /* LWIP_DNS_API_HOSTENT_STORAGE */
+}
+
+/**
+ * Thread-safe variant of lwip_gethostbyname: instead of using a static
+ * buffer, this function takes buffer and errno pointers as arguments
+ * and uses these for the result.
+ *
+ * @param name the hostname to resolve
+ * @param ret pre-allocated struct where to store the result
+ * @param buf pre-allocated buffer where to store additional data
+ * @param buflen the size of buf
+ * @param result pointer to a hostent pointer that is set to ret on success
+ *               and set to zero on error
+ * @param h_errnop pointer to an int where to store errors (instead of modifying
+ *                 the global h_errno)
+ * @return 0 on success, non-zero on error, additional error information
+ *         is stored in *h_errnop instead of h_errno to be thread-safe
+ */
+int
+lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
+                     size_t buflen, struct hostent **result, int *h_errnop)
+{
+  err_t err;
+  struct gethostbyname_r_helper *h;
+  char *hostname;
+  size_t namelen;
+  int lh_errno;
+
+  if (h_errnop == NULL) {
+    /* ensure h_errnop is never NULL */
+    h_errnop = &lh_errno;
+  }
+
+  if (result == NULL) {
+    /* not all arguments given */
+    *h_errnop = EINVAL;
+    return -1;
+  }
+  /* first thing to do: set *result to nothing */
+  *result = NULL;
+  if ((name == NULL) || (ret == NULL) || (buf == NULL)) {
+    /* not all arguments given */
+    *h_errnop = EINVAL;
+    return -1;
+  }
+
+  namelen = strlen(name);
+  if (buflen < (sizeof(struct gethostbyname_r_helper) + LWIP_MEM_ALIGN_BUFFER(namelen + 1))) {
+    /* buf can't hold the data needed + a copy of name */
+    *h_errnop = ERANGE;
+    return -1;
+  }
+
+  h = (struct gethostbyname_r_helper *)LWIP_MEM_ALIGN(buf);
+  hostname = ((char *)h) + sizeof(struct gethostbyname_r_helper);
+
+  /* query host IP address */
+  err = netconn_gethostbyname(name, &h->addr);
+  if (err != ERR_OK) {
+    LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
+    *h_errnop = HOST_NOT_FOUND;
+    return -1;
+  }
+
+  /* copy the hostname into buf */
+  MEMCPY(hostname, name, namelen);
+  hostname[namelen] = 0;
+
+  /* fill hostent */
+  h->addr_list[0] = &h->addr;
+  h->addr_list[1] = NULL;
+  h->aliases = NULL;
+  ret->h_name = hostname;
+  ret->h_aliases = &h->aliases;
+  ret->h_addrtype = AF_INET;
+  ret->h_length = sizeof(ip_addr_t);
+  ret->h_addr_list = (char **)&h->addr_list;
+
+  /* set result != NULL */
+  *result = ret;
+
+  /* return success */
+  return 0;
+}
+
+/**
+ * Frees one or more addrinfo structures returned by getaddrinfo(), along with
+ * any additional storage associated with those structures. If the ai_next field
+ * of the structure is not null, the entire list of structures is freed.
+ *
+ * @param ai struct addrinfo to free
+ */
+void
+lwip_freeaddrinfo(struct addrinfo *ai)
+{
+  struct addrinfo *next;
+
+  while (ai != NULL) {
+    next = ai->ai_next;
+    memp_free(MEMP_NETDB, ai);
+    ai = next;
+  }
+}
+
+/**
+ * Translates the name of a service location (for example, a host name) and/or
+ * a service name and returns a set of socket addresses and associated
+ * information to be used in creating a socket with which to address the
+ * specified service.
+ * Memory for the result is allocated internally and must be freed by calling
+ * lwip_freeaddrinfo()!
+ *
+ * Due to a limitation in dns_gethostbyname, only the first address of a
+ * host is returned.
+ * Also, service names are not supported (only port numbers)!
+ *
+ * @param nodename descriptive name or address string of the host
+ *                 (may be NULL -> local address)
+ * @param servname port number as string of NULL
+ * @param hints structure containing input values that set socktype and protocol
+ * @param res pointer to a pointer where to store the result (set to NULL on failure)
+ * @return 0 on success, non-zero on failure
+ *
+ * @todo: implement AI_V4MAPPED, AI_ADDRCONFIG
+ */
+int
+lwip_getaddrinfo(const char *nodename, const char *servname,
+                 const struct addrinfo *hints, struct addrinfo **res)
+{
+  err_t err;
+  ip_addr_t addr;
+  struct addrinfo *ai;
+  struct sockaddr_storage *sa = NULL;
+  int port_nr = 0;
+  size_t total_size;
+  size_t namelen = 0;
+  int ai_family;
+
+  if (res == NULL) {
+    return EAI_FAIL;
+  }
+  *res = NULL;
+  if ((nodename == NULL) && (servname == NULL)) {
+    return EAI_NONAME;
+  }
+
+  if (hints != NULL) {
+    ai_family = hints->ai_family;
+    if ((ai_family != AF_UNSPEC)
+#if LWIP_IPV4
+        && (ai_family != AF_INET)
+#endif /* LWIP_IPV4 */
+#if LWIP_IPV6
+        && (ai_family != AF_INET6)
+#endif /* LWIP_IPV6 */
+       ) {
+      return EAI_FAMILY;
+    }
+  } else {
+    ai_family = AF_UNSPEC;
+  }
+
+  if (servname != NULL) {
+    /* service name specified: convert to port number
+     * @todo?: currently, only ASCII integers (port numbers) are supported (AI_NUMERICSERV)! */
+    port_nr = atoi(servname);
+    if (port_nr == 0 && (servname[0] != '0')) {
+      /* atoi failed - service was not numeric */
+      return EAI_SERVICE;
+    }
+    if ((port_nr < 0) || (port_nr > 0xffff)) {
+      return EAI_SERVICE;
+    }
+  }
+
+  if (nodename != NULL) {
+    /* service location specified, try to resolve */
+    if ((hints != NULL) && (hints->ai_flags & AI_NUMERICHOST)) {
+      /* no DNS lookup, just parse for an address string */
+      if (!ipaddr_aton(nodename, &addr)) {
+        return EAI_NONAME;
+      }
+#if LWIP_IPV4 && LWIP_IPV6
+      if ((IP_IS_V6_VAL(addr) && ai_family == AF_INET) ||
+          (IP_IS_V4_VAL(addr) && ai_family == AF_INET6)) {
+        return EAI_NONAME;
+      }
+#endif /* LWIP_IPV4 && LWIP_IPV6 */
+    } else {
+#if LWIP_IPV4 && LWIP_IPV6
+      /* AF_UNSPEC: prefer IPv4 */
+      u8_t type = NETCONN_DNS_IPV4_IPV6;
+      if (ai_family == AF_INET) {
+        type = NETCONN_DNS_IPV4;
+      } else if (ai_family == AF_INET6) {
+        type = NETCONN_DNS_IPV6;
+      }
+#endif /* LWIP_IPV4 && LWIP_IPV6 */
+      err = netconn_gethostbyname_addrtype(nodename, &addr, type);
+      if (err != ERR_OK) {
+        return EAI_FAIL;
+      }
+    }
+  } else {
+    /* service location specified, use loopback address */
+    if ((hints != NULL) && (hints->ai_flags & AI_PASSIVE)) {
+      ip_addr_set_any_val(ai_family == AF_INET6, addr);
+    } else {
+      ip_addr_set_loopback_val(ai_family == AF_INET6, addr);
+    }
+  }
+
+  total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_storage);
+  if (nodename != NULL) {
+    namelen = strlen(nodename);
+    if (namelen > DNS_MAX_NAME_LENGTH) {
+      /* invalid name length */
+      return EAI_FAIL;
+    }
+    LWIP_ASSERT("namelen is too long", total_size + namelen + 1 > total_size);
+    total_size += namelen + 1;
+  }
+  /* If this fails, please report to lwip-devel! :-) */
+  LWIP_ASSERT("total_size <= NETDB_ELEM_SIZE: please report this!",
+              total_size <= NETDB_ELEM_SIZE);
+  ai = (struct addrinfo *)memp_malloc(MEMP_NETDB);
+  if (ai == NULL) {
+    return EAI_MEMORY;
+  }
+  memset(ai, 0, total_size);
+  /* cast through void* to get rid of alignment warnings */
+  sa = (struct sockaddr_storage *)(void *)((u8_t *)ai + sizeof(struct addrinfo));
+  if (IP_IS_V6_VAL(addr)) {
+#if LWIP_IPV6
+    struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
+    /* set up sockaddr */
+    inet6_addr_from_ip6addr(&sa6->sin6_addr, ip_2_ip6(&addr));
+    sa6->sin6_family = AF_INET6;
+    sa6->sin6_len = sizeof(struct sockaddr_in6);
+    sa6->sin6_port = lwip_htons((u16_t)port_nr);
+    sa6->sin6_scope_id = ip6_addr_zone(ip_2_ip6(&addr));
+    ai->ai_family = AF_INET6;
+#endif /* LWIP_IPV6 */
+  } else {
+#if LWIP_IPV4
+    struct sockaddr_in *sa4 = (struct sockaddr_in *)sa;
+    /* set up sockaddr */
+    inet_addr_from_ip4addr(&sa4->sin_addr, ip_2_ip4(&addr));
+    sa4->sin_family = AF_INET;
+    sa4->sin_len = sizeof(struct sockaddr_in);
+    sa4->sin_port = lwip_htons((u16_t)port_nr);
+    ai->ai_family = AF_INET;
+#endif /* LWIP_IPV4 */
+  }
+
+  /* set up addrinfo */
+  if (hints != NULL) {
+    /* copy socktype & protocol from hints if specified */
+    ai->ai_socktype = hints->ai_socktype;
+    ai->ai_protocol = hints->ai_protocol;
+  }
+  if (nodename != NULL) {
+    /* copy nodename to canonname if specified */
+    ai->ai_canonname = ((char *)ai + sizeof(struct addrinfo) + sizeof(struct sockaddr_storage));
+    MEMCPY(ai->ai_canonname, nodename, namelen);
+    ai->ai_canonname[namelen] = 0;
+  }
+  ai->ai_addrlen = sizeof(struct sockaddr_storage);
+  ai->ai_addr = (struct sockaddr *)sa;
+
+  *res = ai;
+
+  return 0;
+}
+
+#endif /* LWIP_DNS && LWIP_SOCKET */

src/lwip/api/netifapi.c

@@ -0,0 +1,380 @@
+/**
+ * @file
+ * Network Interface Sequential API module
+ *
+ * @defgroup netifapi NETIF API
+ * @ingroup sequential_api
+ * Thread-safe functions to be called from non-TCPIP threads
+ *
+ * @defgroup netifapi_netif NETIF related
+ * @ingroup netifapi
+ * To be called from non-TCPIP threads
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/etharp.h"
+#include "lwip/netifapi.h"
+#include "lwip/memp.h"
+#include "lwip/priv/tcpip_priv.h"
+
+#include <string.h> /* strncpy */
+
+#define NETIFAPI_VAR_REF(name)      API_VAR_REF(name)
+#define NETIFAPI_VAR_DECLARE(name)  API_VAR_DECLARE(struct netifapi_msg, name)
+#define NETIFAPI_VAR_ALLOC(name)    API_VAR_ALLOC(struct netifapi_msg, MEMP_NETIFAPI_MSG, name, ERR_MEM)
+#define NETIFAPI_VAR_FREE(name)     API_VAR_FREE(MEMP_NETIFAPI_MSG, name)
+
+/**
+ * Call netif_add() inside the tcpip_thread context.
+ */
+static err_t
+netifapi_do_netif_add(struct tcpip_api_call_data *m)
+{
+  /* cast through void* to silence alignment warnings.
+   * We know it works because the structs have been instantiated as struct netifapi_msg */
+  struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m;
+
+  if (!netif_add( msg->netif,
+#if LWIP_IPV4
+                  API_EXPR_REF(msg->msg.add.ipaddr),
+                  API_EXPR_REF(msg->msg.add.netmask),
+                  API_EXPR_REF(msg->msg.add.gw),
+#endif /* LWIP_IPV4 */
+                  msg->msg.add.state,
+                  msg->msg.add.init,
+                  msg->msg.add.input)) {
+    return ERR_IF;
+  } else {
+    return ERR_OK;
+  }
+}
+
+#if LWIP_IPV4
+/**
+ * Call netif_set_addr() inside the tcpip_thread context.
+ */
+static err_t
+netifapi_do_netif_set_addr(struct tcpip_api_call_data *m)
+{
+  /* cast through void* to silence alignment warnings.
+   * We know it works because the structs have been instantiated as struct netifapi_msg */
+  struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m;
+
+  netif_set_addr( msg->netif,
+                  API_EXPR_REF(msg->msg.add.ipaddr),
+                  API_EXPR_REF(msg->msg.add.netmask),
+                  API_EXPR_REF(msg->msg.add.gw));
+  return ERR_OK;
+}
+#endif /* LWIP_IPV4 */
+
+/**
+* Call netif_name_to_index() inside the tcpip_thread context.
+*/
+static err_t
+netifapi_do_name_to_index(struct tcpip_api_call_data *m)
+{
+  /* cast through void* to silence alignment warnings.
+   * We know it works because the structs have been instantiated as struct netifapi_msg */
+  struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m;
+
+  msg->msg.ifs.index = netif_name_to_index(msg->msg.ifs.name);
+  return ERR_OK;
+}
+
+/**
+* Call netif_index_to_name() inside the tcpip_thread context.
+*/
+static err_t
+netifapi_do_index_to_name(struct tcpip_api_call_data *m)
+{
+  /* cast through void* to silence alignment warnings.
+   * We know it works because the structs have been instantiated as struct netifapi_msg */
+  struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m;
+
+  if (!netif_index_to_name(msg->msg.ifs.index, msg->msg.ifs.name)) {
+    /* return failure via empty name */
+    msg->msg.ifs.name[0] = '\0';
+  }
+  return ERR_OK;
+}
+
+/**
+ * Call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) inside the
+ * tcpip_thread context.
+ */
+static err_t
+netifapi_do_netif_common(struct tcpip_api_call_data *m)
+{
+  /* cast through void* to silence alignment warnings.
+   * We know it works because the structs have been instantiated as struct netifapi_msg */
+  struct netifapi_msg *msg = (struct netifapi_msg *)(void *)m;
+
+  if (msg->msg.common.errtfunc != NULL) {
+    return msg->msg.common.errtfunc(msg->netif);
+  } else {
+    msg->msg.common.voidfunc(msg->netif);
+    return ERR_OK;
+  }
+}
+
+#if LWIP_ARP && LWIP_IPV4
+/**
+ * @ingroup netifapi_arp
+ * Add or update an entry in the ARP cache.
+ * For an update, ipaddr is used to find the cache entry.
+ *
+ * @param ipaddr IPv4 address of cache entry
+ * @param ethaddr hardware address mapped to ipaddr
+ * @param type type of ARP cache entry
+ * @return ERR_OK: entry added/updated, else error from err_t
+ */
+err_t
+netifapi_arp_add(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr, enum netifapi_arp_entry type)
+{
+  err_t err;
+
+  /* We only support permanent entries currently */
+  LWIP_UNUSED_ARG(type);
+
+#if ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING
+  LOCK_TCPIP_CORE();
+  err = etharp_add_static_entry(ipaddr, ethaddr);
+  UNLOCK_TCPIP_CORE();
+#else
+  /* @todo add new vars to struct netifapi_msg and create a 'do' func */
+  LWIP_UNUSED_ARG(ipaddr);
+  LWIP_UNUSED_ARG(ethaddr);
+  err = ERR_VAL;
+#endif /* ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING */
+
+  return err;
+}
+
+/**
+ * @ingroup netifapi_arp
+ * Remove an entry in the ARP cache identified by ipaddr
+ *
+ * @param ipaddr IPv4 address of cache entry
+ * @param type type of ARP cache entry
+ * @return ERR_OK: entry removed, else error from err_t
+ */
+err_t
+netifapi_arp_remove(const ip4_addr_t *ipaddr, enum netifapi_arp_entry type)
+{
+  err_t err;
+
+  /* We only support permanent entries currently */
+  LWIP_UNUSED_ARG(type);
+
+#if ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING
+  LOCK_TCPIP_CORE();
+  err = etharp_remove_static_entry(ipaddr);
+  UNLOCK_TCPIP_CORE();
+#else
+  /* @todo add new vars to struct netifapi_msg and create a 'do' func */
+  LWIP_UNUSED_ARG(ipaddr);
+  err = ERR_VAL;
+#endif /* ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING */
+
+  return err;
+}
+#endif /* LWIP_ARP && LWIP_IPV4 */
+
+/**
+ * @ingroup netifapi_netif
+ * Call netif_add() in a thread-safe way by running that function inside the
+ * tcpip_thread context.
+ *
+ * @note for params @see netif_add()
+ */
+err_t
+netifapi_netif_add(struct netif *netif,
+#if LWIP_IPV4
+                   const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw,
+#endif /* LWIP_IPV4 */
+                   void *state, netif_init_fn init, netif_input_fn input)
+{
+  err_t err;
+  NETIFAPI_VAR_DECLARE(msg);
+  NETIFAPI_VAR_ALLOC(msg);
+
+#if LWIP_IPV4
+  if (ipaddr == NULL) {
+    ipaddr = IP4_ADDR_ANY4;
+  }
+  if (netmask == NULL) {
+    netmask = IP4_ADDR_ANY4;
+  }
+  if (gw == NULL) {
+    gw = IP4_ADDR_ANY4;
+  }
+#endif /* LWIP_IPV4 */
+
+  NETIFAPI_VAR_REF(msg).netif = netif;
+#if LWIP_IPV4
+  NETIFAPI_VAR_REF(msg).msg.add.ipaddr  = NETIFAPI_VAR_REF(ipaddr);
+  NETIFAPI_VAR_REF(msg).msg.add.netmask = NETIFAPI_VAR_REF(netmask);
+  NETIFAPI_VAR_REF(msg).msg.add.gw      = NETIFAPI_VAR_REF(gw);
+#endif /* LWIP_IPV4 */
+  NETIFAPI_VAR_REF(msg).msg.add.state   = state;
+  NETIFAPI_VAR_REF(msg).msg.add.init    = init;
+  NETIFAPI_VAR_REF(msg).msg.add.input   = input;
+  err = tcpip_api_call(netifapi_do_netif_add, &API_VAR_REF(msg).call);
+  NETIFAPI_VAR_FREE(msg);
+  return err;
+}
+
+#if LWIP_IPV4
+/**
+ * @ingroup netifapi_netif
+ * Call netif_set_addr() in a thread-safe way by running that function inside the
+ * tcpip_thread context.
+ *
+ * @note for params @see netif_set_addr()
+ */
+err_t
+netifapi_netif_set_addr(struct netif *netif,
+                        const ip4_addr_t *ipaddr,
+                        const ip4_addr_t *netmask,
+                        const ip4_addr_t *gw)
+{
+  err_t err;
+  NETIFAPI_VAR_DECLARE(msg);
+  NETIFAPI_VAR_ALLOC(msg);
+
+  if (ipaddr == NULL) {
+    ipaddr = IP4_ADDR_ANY4;
+  }
+  if (netmask == NULL) {
+    netmask = IP4_ADDR_ANY4;
+  }
+  if (gw == NULL) {
+    gw = IP4_ADDR_ANY4;
+  }
+
+  NETIFAPI_VAR_REF(msg).netif = netif;
+  NETIFAPI_VAR_REF(msg).msg.add.ipaddr  = NETIFAPI_VAR_REF(ipaddr);
+  NETIFAPI_VAR_REF(msg).msg.add.netmask = NETIFAPI_VAR_REF(netmask);
+  NETIFAPI_VAR_REF(msg).msg.add.gw      = NETIFAPI_VAR_REF(gw);
+  err = tcpip_api_call(netifapi_do_netif_set_addr, &API_VAR_REF(msg).call);
+  NETIFAPI_VAR_FREE(msg);
+  return err;
+}
+#endif /* LWIP_IPV4 */
+
+/**
+ * call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) in a thread-safe
+ * way by running that function inside the tcpip_thread context.
+ *
+ * @note use only for functions where there is only "netif" parameter.
+ */
+err_t
+netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc,
+                      netifapi_errt_fn errtfunc)
+{
+  err_t err;
+  NETIFAPI_VAR_DECLARE(msg);
+  NETIFAPI_VAR_ALLOC(msg);
+
+  NETIFAPI_VAR_REF(msg).netif = netif;
+  NETIFAPI_VAR_REF(msg).msg.common.voidfunc = voidfunc;
+  NETIFAPI_VAR_REF(msg).msg.common.errtfunc = errtfunc;
+  err = tcpip_api_call(netifapi_do_netif_common, &API_VAR_REF(msg).call);
+  NETIFAPI_VAR_FREE(msg);
+  return err;
+}
+
+/**
+* @ingroup netifapi_netif
+* Call netif_name_to_index() in a thread-safe way by running that function inside the
+* tcpip_thread context.
+*
+* @param name the interface name of the netif
+* @param idx output index of the found netif
+*/
+err_t
+netifapi_netif_name_to_index(const char *name, u8_t *idx)
+{
+  err_t err;
+  NETIFAPI_VAR_DECLARE(msg);
+  NETIFAPI_VAR_ALLOC(msg);
+
+  *idx = 0;
+
+#if LWIP_MPU_COMPATIBLE
+  strncpy(NETIFAPI_VAR_REF(msg).msg.ifs.name, name, NETIF_NAMESIZE - 1);
+  NETIFAPI_VAR_REF(msg).msg.ifs.name[NETIF_NAMESIZE - 1] = '\0';
+#else
+  NETIFAPI_VAR_REF(msg).msg.ifs.name = LWIP_CONST_CAST(char *, name);
+#endif /* LWIP_MPU_COMPATIBLE */
+  err = tcpip_api_call(netifapi_do_name_to_index, &API_VAR_REF(msg).call);
+  if (!err) {
+    *idx = NETIFAPI_VAR_REF(msg).msg.ifs.index;
+  }
+  NETIFAPI_VAR_FREE(msg);
+  return err;
+}
+
+/**
+* @ingroup netifapi_netif
+* Call netif_index_to_name() in a thread-safe way by running that function inside the
+* tcpip_thread context.
+*
+* @param idx the interface index of the netif
+* @param name output name of the found netif, empty '\0' string if netif not found.
+*             name should be of at least NETIF_NAMESIZE bytes
+*/
+err_t
+netifapi_netif_index_to_name(u8_t idx, char *name)
+{
+  err_t err;
+  NETIFAPI_VAR_DECLARE(msg);
+  NETIFAPI_VAR_ALLOC(msg);
+
+  NETIFAPI_VAR_REF(msg).msg.ifs.index = idx;
+#if !LWIP_MPU_COMPATIBLE
+  NETIFAPI_VAR_REF(msg).msg.ifs.name = name;
+#endif /* LWIP_MPU_COMPATIBLE */
+  err = tcpip_api_call(netifapi_do_index_to_name, &API_VAR_REF(msg).call);
+#if LWIP_MPU_COMPATIBLE
+  if (!err) {
+    strncpy(name, NETIFAPI_VAR_REF(msg).msg.ifs.name, NETIF_NAMESIZE - 1);
+    name[NETIF_NAMESIZE - 1] = '\0';
+  }
+#endif /* LWIP_MPU_COMPATIBLE */
+  NETIFAPI_VAR_FREE(msg);
+  return err;
+}
+
+#endif /* LWIP_NETIF_API */

src/lwip/api/tcpip.c

@@ -0,0 +1,708 @@
+/**
+ * @file
+ * Sequential API Main thread module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if !NO_SYS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/priv/tcpip_priv.h"
+#include "lwip/sys.h"
+#include "lwip/memp.h"
+#include "lwip/mem.h"
+#include "lwip/init.h"
+#include "lwip/ip.h"
+#include "lwip/pbuf.h"
+#include "lwip/etharp.h"
+#include "netif/ethernet.h"
+
+#define TCPIP_MSG_VAR_REF(name)     API_VAR_REF(name)
+#define TCPIP_MSG_VAR_DECLARE(name) API_VAR_DECLARE(struct tcpip_msg, name)
+#define TCPIP_MSG_VAR_ALLOC(name)   API_VAR_ALLOC(struct tcpip_msg, MEMP_TCPIP_MSG_API, name, ERR_MEM)
+#define TCPIP_MSG_VAR_FREE(name)    API_VAR_FREE(MEMP_TCPIP_MSG_API, name)
+
+/* global variables */
+static tcpip_init_done_fn tcpip_init_done;
+static void *tcpip_init_done_arg;
+static sys_mbox_t tcpip_mbox;
+
+TaskHandle_t tcpip_task_handle;
+
+#if LWIP_TCPIP_CORE_LOCKING
+/** The global semaphore to lock the stack. */
+sys_mutex_t lock_tcpip_core;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+
+static void tcpip_thread_handle_msg(struct tcpip_msg *msg);
+
+#if !LWIP_TIMERS
+/* wait for a message with timers disabled (e.g. pass a timer-check trigger into tcpip_thread) */
+#define TCPIP_MBOX_FETCH(mbox, msg) sys_mbox_fetch(mbox, msg)
+#else /* !LWIP_TIMERS */
+/* wait for a message, timeouts are processed while waiting */
+#define TCPIP_MBOX_FETCH(mbox, msg) tcpip_timeouts_mbox_fetch(mbox, msg)
+/**
+ * Wait (forever) for a message to arrive in an mbox.
+ * While waiting, timeouts are processed.
+ *
+ * @param mbox the mbox to fetch the message from
+ * @param msg the place to store the message
+ */
+static void
+tcpip_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg)
+{
+  u32_t sleeptime, res;
+
+again:
+  LWIP_ASSERT_CORE_LOCKED();
+
+  sleeptime = sys_timeouts_sleeptime();
+  if (sleeptime == SYS_TIMEOUTS_SLEEPTIME_INFINITE) {
+    UNLOCK_TCPIP_CORE();
+    sys_arch_mbox_fetch(mbox, msg, 0);
+    LOCK_TCPIP_CORE();
+    return;
+  } else if (sleeptime == 0) {
+    sys_check_timeouts();
+    /* We try again to fetch a message from the mbox. */
+    goto again;
+  }
+
+  UNLOCK_TCPIP_CORE();
+  res = sys_arch_mbox_fetch(mbox, msg, sleeptime);
+  LOCK_TCPIP_CORE();
+  if (res == SYS_ARCH_TIMEOUT) {
+    /* If a SYS_ARCH_TIMEOUT value is returned, a timeout occurred
+       before a message could be fetched. */
+    sys_check_timeouts();
+    /* We try again to fetch a message from the mbox. */
+    goto again;
+  }
+}
+#endif /* !LWIP_TIMERS */
+
+/**
+ * The main lwIP thread. This thread has exclusive access to lwIP core functions
+ * (unless access to them is not locked). Other threads communicate with this
+ * thread using message boxes.
+ *
+ * It also starts all the timers to make sure they are running in the right
+ * thread context.
+ *
+ * @param arg unused argument
+ */
+static void
+tcpip_thread(void *arg)
+{
+  struct tcpip_msg *msg;
+  LWIP_UNUSED_ARG(arg);
+
+  LWIP_MARK_TCPIP_THREAD();
+
+  LOCK_TCPIP_CORE();
+  if (tcpip_init_done != NULL) {
+    tcpip_init_done(tcpip_init_done_arg);
+  }
+
+  while (1) {                          /* MAIN Loop */
+    LWIP_TCPIP_THREAD_ALIVE();
+    /* wait for a message, timeouts are processed while waiting */
+    TCPIP_MBOX_FETCH(&tcpip_mbox, (void **)&msg);
+    if (msg == NULL) {
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: NULL\n"));
+      LWIP_ASSERT("tcpip_thread: invalid message", 0);
+      continue;
+    }
+    tcpip_thread_handle_msg(msg);
+  }
+}
+
+/* Handle a single tcpip_msg
+ * This is in its own function for access by tests only.
+ */
+static void
+tcpip_thread_handle_msg(struct tcpip_msg *msg)
+{
+  switch (msg->type) {
+#if !LWIP_TCPIP_CORE_LOCKING
+    case TCPIP_MSG_API:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
+      msg->msg.api_msg.function(msg->msg.api_msg.msg);
+      break;
+    case TCPIP_MSG_API_CALL:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API CALL message %p\n", (void *)msg));
+      msg->msg.api_call.arg->err = msg->msg.api_call.function(msg->msg.api_call.arg);
+      sys_sem_signal(msg->msg.api_call.sem);
+      break;
+    case TCPIP_MSG_CALLBACK_STATIC_WAIT:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK WAIT message %p\n", (void *)msg));
+      msg->msg.cb_wait.function(msg->msg.cb_wait.ctx);
+      sys_sem_signal(msg->msg.cb_wait.sem);
+      break;
+#endif /* !LWIP_TCPIP_CORE_LOCKING */
+
+#if !LWIP_TCPIP_CORE_LOCKING_INPUT
+    case TCPIP_MSG_INPKT:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg));
+      if (msg->msg.inp.input_fn(msg->msg.inp.p, msg->msg.inp.netif) != ERR_OK) {
+        pbuf_free(msg->msg.inp.p);
+      }
+      memp_free(MEMP_TCPIP_MSG_INPKT, msg);
+      break;
+#endif /* !LWIP_TCPIP_CORE_LOCKING_INPUT */
+
+#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
+    case TCPIP_MSG_TIMEOUT:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg));
+      sys_timeout(msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg);
+      memp_free(MEMP_TCPIP_MSG_API, msg);
+      break;
+    case TCPIP_MSG_UNTIMEOUT:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: UNTIMEOUT %p\n", (void *)msg));
+      sys_untimeout(msg->msg.tmo.h, msg->msg.tmo.arg);
+      memp_free(MEMP_TCPIP_MSG_API, msg);
+      break;
+#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
+
+    case TCPIP_MSG_CALLBACK:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
+      msg->msg.cb.function(msg->msg.cb.ctx);
+      memp_free(MEMP_TCPIP_MSG_API, msg);
+      break;
+
+    case TCPIP_MSG_CALLBACK_STATIC:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK_STATIC %p\n", (void *)msg));
+      msg->msg.cb.function(msg->msg.cb.ctx);
+      break;
+
+    default:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: %d\n", msg->type));
+      LWIP_ASSERT("tcpip_thread: invalid message", 0);
+      break;
+  }
+}
+
+#ifdef TCPIP_THREAD_TEST
+/** Work on queued items in single-threaded test mode */
+int
+tcpip_thread_poll_one(void)
+{
+  int ret = 0;
+  struct tcpip_msg *msg;
+
+  if (sys_arch_mbox_tryfetch(&tcpip_mbox, (void **)&msg) != SYS_MBOX_EMPTY) {
+    LOCK_TCPIP_CORE();
+    if (msg != NULL) {
+      tcpip_thread_handle_msg(msg);
+      ret = 1;
+    }
+    UNLOCK_TCPIP_CORE();
+  }
+  return ret;
+}
+#endif
+
+/**
+ * Pass a received packet to tcpip_thread for input processing
+ *
+ * @param p the received packet
+ * @param inp the network interface on which the packet was received
+ * @param input_fn input function to call
+ */
+err_t
+tcpip_inpkt(struct pbuf *p, struct netif *inp, netif_input_fn input_fn)
+{
+#if LWIP_TCPIP_CORE_LOCKING_INPUT
+  err_t ret;
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_inpkt: PACKET %p/%p\n", (void *)p, (void *)inp));
+  LOCK_TCPIP_CORE();
+  ret = input_fn(p, inp);
+  UNLOCK_TCPIP_CORE();
+  return ret;
+#else /* LWIP_TCPIP_CORE_LOCKING_INPUT */
+  struct tcpip_msg *msg;
+
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_INPKT);
+  if (msg == NULL) {
+    return ERR_MEM;
+  }
+
+  msg->type = TCPIP_MSG_INPKT;
+  msg->msg.inp.p = p;
+  msg->msg.inp.netif = inp;
+  msg->msg.inp.input_fn = input_fn;
+  if (sys_mbox_trypost(&tcpip_mbox, msg) != ERR_OK) {
+    memp_free(MEMP_TCPIP_MSG_INPKT, msg);
+    return ERR_MEM;
+  }
+  return ERR_OK;
+#endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */
+}
+
+/**
+ * @ingroup lwip_os
+ * Pass a received packet to tcpip_thread for input processing with
+ * ethernet_input or ip_input. Don't call directly, pass to netif_add()
+ * and call netif->input().
+ *
+ * @param p the received packet, p->payload pointing to the Ethernet header or
+ *          to an IP header (if inp doesn't have NETIF_FLAG_ETHARP or
+ *          NETIF_FLAG_ETHERNET flags)
+ * @param inp the network interface on which the packet was received
+ */
+err_t
+tcpip_input(struct pbuf *p, struct netif *inp)
+{
+#if LWIP_ETHERNET
+  if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
+    return tcpip_inpkt(p, inp, ethernet_input);
+  } else
+#endif /* LWIP_ETHERNET */
+    return tcpip_inpkt(p, inp, ip_input);
+}
+
+/**
+ * @ingroup lwip_os
+ * Call a specific function in the thread context of
+ * tcpip_thread for easy access synchronization.
+ * A function called in that way may access lwIP core code
+ * without fearing concurrent access.
+ * Blocks until the request is posted.
+ * Must not be called from interrupt context!
+ *
+ * @param function the function to call
+ * @param ctx parameter passed to f
+ * @return ERR_OK if the function was called, another err_t if not
+ *
+ * @see tcpip_try_callback
+ */
+err_t
+tcpip_callback(tcpip_callback_fn function, void *ctx)
+{
+  struct tcpip_msg *msg;
+
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+  if (msg == NULL) {
+    return ERR_MEM;
+  }
+
+  msg->type = TCPIP_MSG_CALLBACK;
+  msg->msg.cb.function = function;
+  msg->msg.cb.ctx = ctx;
+
+  sys_mbox_post(&tcpip_mbox, msg);
+  return ERR_OK;
+}
+
+/**
+ * @ingroup lwip_os
+ * Call a specific function in the thread context of
+ * tcpip_thread for easy access synchronization.
+ * A function called in that way may access lwIP core code
+ * without fearing concurrent access.
+ * Does NOT block when the request cannot be posted because the
+ * tcpip_mbox is full, but returns ERR_MEM instead.
+ * Can be called from interrupt context.
+ *
+ * @param function the function to call
+ * @param ctx parameter passed to f
+ * @return ERR_OK if the function was called, another err_t if not
+ *
+ * @see tcpip_callback
+ */
+err_t
+tcpip_try_callback(tcpip_callback_fn function, void *ctx)
+{
+  struct tcpip_msg *msg;
+
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+  if (msg == NULL) {
+    return ERR_MEM;
+  }
+
+  msg->type = TCPIP_MSG_CALLBACK;
+  msg->msg.cb.function = function;
+  msg->msg.cb.ctx = ctx;
+
+  if (sys_mbox_trypost(&tcpip_mbox, msg) != ERR_OK) {
+    memp_free(MEMP_TCPIP_MSG_API, msg);
+    return ERR_MEM;
+  }
+  return ERR_OK;
+}
+
+#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
+/**
+ * call sys_timeout in tcpip_thread
+ *
+ * @param msecs time in milliseconds for timeout
+ * @param h function to be called on timeout
+ * @param arg argument to pass to timeout function h
+ * @return ERR_MEM on memory error, ERR_OK otherwise
+ */
+err_t
+tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
+{
+  struct tcpip_msg *msg;
+
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+  if (msg == NULL) {
+    return ERR_MEM;
+  }
+
+  msg->type = TCPIP_MSG_TIMEOUT;
+  msg->msg.tmo.msecs = msecs;
+  msg->msg.tmo.h = h;
+  msg->msg.tmo.arg = arg;
+  sys_mbox_post(&tcpip_mbox, msg);
+  return ERR_OK;
+}
+
+/**
+ * call sys_untimeout in tcpip_thread
+ *
+ * @param h function to be called on timeout
+ * @param arg argument to pass to timeout function h
+ * @return ERR_MEM on memory error, ERR_OK otherwise
+ */
+err_t
+tcpip_untimeout(sys_timeout_handler h, void *arg)
+{
+  struct tcpip_msg *msg;
+
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+  if (msg == NULL) {
+    return ERR_MEM;
+  }
+
+  msg->type = TCPIP_MSG_UNTIMEOUT;
+  msg->msg.tmo.h = h;
+  msg->msg.tmo.arg = arg;
+  sys_mbox_post(&tcpip_mbox, msg);
+  return ERR_OK;
+}
+#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
+
+
+/**
+ * Sends a message to TCPIP thread to call a function. Caller thread blocks on
+ * on a provided semaphore, which ist NOT automatically signalled by TCPIP thread,
+ * this has to be done by the user.
+ * It is recommended to use LWIP_TCPIP_CORE_LOCKING since this is the way
+ * with least runtime overhead.
+ *
+ * @param fn function to be called from TCPIP thread
+ * @param apimsg argument to API function
+ * @param sem semaphore to wait on
+ * @return ERR_OK if the function was called, another err_t if not
+ */
+err_t
+tcpip_send_msg_wait_sem(tcpip_callback_fn fn, void *apimsg, sys_sem_t *sem)
+{
+#if LWIP_TCPIP_CORE_LOCKING
+  LWIP_UNUSED_ARG(sem);
+  LOCK_TCPIP_CORE();
+  fn(apimsg);
+  UNLOCK_TCPIP_CORE();
+  return ERR_OK;
+#else /* LWIP_TCPIP_CORE_LOCKING */
+  TCPIP_MSG_VAR_DECLARE(msg);
+
+  LWIP_ASSERT("semaphore not initialized", sys_sem_valid(sem));
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  TCPIP_MSG_VAR_ALLOC(msg);
+  TCPIP_MSG_VAR_REF(msg).type = TCPIP_MSG_API;
+  TCPIP_MSG_VAR_REF(msg).msg.api_msg.function = fn;
+  TCPIP_MSG_VAR_REF(msg).msg.api_msg.msg = apimsg;
+  sys_mbox_post(&tcpip_mbox, &TCPIP_MSG_VAR_REF(msg));
+  sys_arch_sem_wait(sem, 0);
+  TCPIP_MSG_VAR_FREE(msg);
+  return ERR_OK;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+}
+
+/**
+ * Synchronously calls function in TCPIP thread and waits for its completion.
+ * It is recommended to use LWIP_TCPIP_CORE_LOCKING (preferred) or
+ * LWIP_NETCONN_SEM_PER_THREAD.
+ * If not, a semaphore is created and destroyed on every call which is usually
+ * an expensive/slow operation.
+ * @param fn Function to call
+ * @param call Call parameters
+ * @return Return value from tcpip_api_call_fn
+ */
+err_t
+tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call_data *call)
+{
+#if LWIP_TCPIP_CORE_LOCKING
+  err_t err;
+  LOCK_TCPIP_CORE();
+  err = fn(call);
+  UNLOCK_TCPIP_CORE();
+  return err;
+#else /* LWIP_TCPIP_CORE_LOCKING */
+  TCPIP_MSG_VAR_DECLARE(msg);
+
+#if !LWIP_NETCONN_SEM_PER_THREAD
+  err_t err = sys_sem_new(&call->sem, 0);
+  if (err != ERR_OK) {
+    return err;
+  }
+#endif /* LWIP_NETCONN_SEM_PER_THREAD */
+
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  TCPIP_MSG_VAR_ALLOC(msg);
+  TCPIP_MSG_VAR_REF(msg).type = TCPIP_MSG_API_CALL;
+  TCPIP_MSG_VAR_REF(msg).msg.api_call.arg = call;
+  TCPIP_MSG_VAR_REF(msg).msg.api_call.function = fn;
+#if LWIP_NETCONN_SEM_PER_THREAD
+  TCPIP_MSG_VAR_REF(msg).msg.api_call.sem = LWIP_NETCONN_THREAD_SEM_GET();
+#else /* LWIP_NETCONN_SEM_PER_THREAD */
+  TCPIP_MSG_VAR_REF(msg).msg.api_call.sem = &call->sem;
+#endif /* LWIP_NETCONN_SEM_PER_THREAD */
+  sys_mbox_post(&tcpip_mbox, &TCPIP_MSG_VAR_REF(msg));
+  sys_arch_sem_wait(TCPIP_MSG_VAR_REF(msg).msg.api_call.sem, 0);
+  TCPIP_MSG_VAR_FREE(msg);
+
+#if !LWIP_NETCONN_SEM_PER_THREAD
+  sys_sem_free(&call->sem);
+#endif /* LWIP_NETCONN_SEM_PER_THREAD */
+
+  return call->err;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+}
+
+/**
+ * @ingroup lwip_os
+ * Allocate a structure for a static callback message and initialize it.
+ * The message has a special type such that lwIP never frees it.
+ * This is intended to be used to send "static" messages from interrupt context,
+ * e.g. the message is allocated once and posted several times from an IRQ
+ * using tcpip_callbackmsg_trycallback().
+ * Example usage: Trigger execution of an ethernet IRQ DPC routine in lwIP thread context.
+ *
+ * @param function the function to call
+ * @param ctx parameter passed to function
+ * @return a struct pointer to pass to tcpip_callbackmsg_trycallback().
+ *
+ * @see tcpip_callbackmsg_trycallback()
+ * @see tcpip_callbackmsg_delete()
+ */
+struct tcpip_callback_msg *
+tcpip_callbackmsg_new(tcpip_callback_fn function, void *ctx)
+{
+  struct tcpip_msg *msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
+  if (msg == NULL) {
+    return NULL;
+  }
+  msg->type = TCPIP_MSG_CALLBACK_STATIC;
+  msg->msg.cb.function = function;
+  msg->msg.cb.ctx = ctx;
+  return (struct tcpip_callback_msg *)msg;
+}
+
+/**
+ * @ingroup lwip_os
+ * Free a callback message allocated by tcpip_callbackmsg_new().
+ *
+ * @param msg the message to free
+ *
+ * @see tcpip_callbackmsg_new()
+ */
+void
+tcpip_callbackmsg_delete(struct tcpip_callback_msg *msg)
+{
+  memp_free(MEMP_TCPIP_MSG_API, msg);
+}
+
+/**
+ * @ingroup lwip_os
+ * Try to post a callback-message to the tcpip_thread tcpip_mbox.
+ *
+ * @param msg pointer to the message to post
+ * @return sys_mbox_trypost() return code
+ *
+ * @see tcpip_callbackmsg_new()
+ */
+err_t
+tcpip_callbackmsg_trycallback(struct tcpip_callback_msg *msg)
+{
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+  return sys_mbox_trypost(&tcpip_mbox, msg);
+}
+
+/**
+ * @ingroup lwip_os
+ * Try to post a callback-message to the tcpip_thread mbox.
+ * Same as @ref tcpip_callbackmsg_trycallback but calls sys_mbox_trypost_fromisr(),
+ * mainly to help FreeRTOS, where calls differ between task level and ISR level.
+ *
+ * @param msg pointer to the message to post
+ * @return sys_mbox_trypost_fromisr() return code (without change, so this
+ *         knowledge can be used to e.g. propagate "bool needs_scheduling")
+ *
+ * @see tcpip_callbackmsg_new()
+ */
+err_t
+tcpip_callbackmsg_trycallback_fromisr(struct tcpip_callback_msg *msg)
+{
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+  return sys_mbox_trypost_fromisr(&tcpip_mbox, msg);
+}
+
+/**
+ * Sends a message to TCPIP thread to call a function. Caller thread blocks
+ * until the function returns.
+ * It is recommended to use LWIP_TCPIP_CORE_LOCKING (preferred) or
+ * LWIP_NETCONN_SEM_PER_THREAD.
+ * If not, a semaphore is created and destroyed on every call which is usually
+ * an expensive/slow operation.
+ *
+ * @param function the function to call
+ * @param ctx parameter passed to f
+ * @return ERR_OK if the function was called, another err_t if not
+ */
+err_t
+tcpip_callback_wait(tcpip_callback_fn function, void *ctx)
+{
+#if LWIP_TCPIP_CORE_LOCKING
+  LOCK_TCPIP_CORE();
+  function(ctx);
+  UNLOCK_TCPIP_CORE();
+  return ERR_OK;
+#else /* LWIP_TCPIP_CORE_LOCKING */
+  err_t err;
+  sys_sem_t sem;
+  struct tcpip_msg msg;
+
+  LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(tcpip_mbox));
+
+  err = sys_sem_new(&sem, 0);
+  if (err != ERR_OK) {
+    return err;
+  }
+
+  msg.type = TCPIP_MSG_CALLBACK_STATIC_WAIT;
+  msg.msg.cb_wait.function = function;
+  msg.msg.cb_wait.ctx = ctx;
+  msg.msg.cb_wait.sem = &sem;
+  sys_mbox_post(&tcpip_mbox, &msg);
+  sys_arch_sem_wait(&sem, 0);
+  sys_sem_free(&sem);
+  return ERR_OK;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+}
+
+/**
+ * @ingroup lwip_os
+ * Initialize this module:
+ * - initialize all sub modules
+ * - start the tcpip_thread
+ *
+ * @param initfunc a function to call when tcpip_thread is running and finished initializing
+ * @param arg argument to pass to initfunc
+ */
+void
+tcpip_init(tcpip_init_done_fn initfunc, void *arg)
+{
+  lwip_init();
+
+  tcpip_init_done = initfunc;
+  tcpip_init_done_arg = arg;
+  if (sys_mbox_new(&tcpip_mbox, TCPIP_MBOX_SIZE) != ERR_OK) {
+    LWIP_ASSERT("failed to create tcpip_thread mbox", 0);
+  }
+#if LWIP_TCPIP_CORE_LOCKING
+  if (sys_mutex_new(&lock_tcpip_core) != ERR_OK) {
+    LWIP_ASSERT("failed to create lock_tcpip_core", 0);
+  }
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+
+  tcpip_task_handle=sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO);
+}
+
+/**
+ * Simple callback function used with tcpip_callback to free a pbuf
+ * (pbuf_free has a wrong signature for tcpip_callback)
+ *
+ * @param p The pbuf (chain) to be dereferenced.
+ */
+static void
+pbuf_free_int(void *p)
+{
+  struct pbuf *q = (struct pbuf *)p;
+  pbuf_free(q);
+}
+
+/**
+ * A simple wrapper function that allows you to free a pbuf from interrupt context.
+ *
+ * @param p The pbuf (chain) to be dereferenced.
+ * @return ERR_OK if callback could be enqueued, an err_t if not
+ */
+err_t
+pbuf_free_callback(struct pbuf *p)
+{
+  return tcpip_try_callback(pbuf_free_int, p);
+}
+
+/**
+ * A simple wrapper function that allows you to free heap memory from
+ * interrupt context.
+ *
+ * @param m the heap memory to free
+ * @return ERR_OK if callback could be enqueued, an err_t if not
+ */
+err_t
+mem_free_callback(void *m)
+{
+  return tcpip_try_callback(mem_free, m);
+}
+
+#endif /* !NO_SYS */

src/lwip/include/compat/posix/arpa/inet.h

@@ -0,0 +1,33 @@
+/**
+ * @file
+ * This file is a posix wrapper for lwip/sockets.h.
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "lwip/sockets.h"

src/lwip/include/compat/posix/net/if.h

@@ -0,0 +1,36 @@
+/**
+ * @file
+ * This file is a posix wrapper for lwip/if_api.h.
+ */
+
+/*
+ * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. <joel.cunningham@garmin.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "lwip/if_api.h"

src/lwip/include/compat/posix/netdb.h

@@ -0,0 +1,33 @@
+/**
+ * @file
+ * This file is a posix wrapper for lwip/netdb.h.
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "lwip/netdb.h"

src/lwip/include/compat/posix/sys/socket.h

@@ -0,0 +1,33 @@
+/**
+ * @file
+ * This file is a posix wrapper for lwip/sockets.h.
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "lwip/sockets.h"

src/lwip/include/compat/stdc/errno.h

@@ -0,0 +1,33 @@
+/**
+ * @file
+ * This file is a posix/stdc wrapper for lwip/errno.h.
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#include "lwip/errno.h"

src/lwip/include/lwip/acd.h

@@ -0,0 +1,109 @@
+/**
+ * @file
+ *
+ * ACD IPv4 Address Conflict Detection
+ */
+
+/*
+ *
+ * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
+ * Copyright (c) 2018 Jasper Verschueren <jasper.verschueren@apart-audio.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
+ * Author: Dominik Spies <kontakt@dspies.de>
+ */
+
+#ifndef LWIP_HDR_ACD_H
+#define LWIP_HDR_ACD_H
+
+#include "lwip/opt.h"
+
+/* don't build if not configured for use in lwipopts.h */
+#if LWIP_IPV4 && LWIP_ACD
+
+#include "lwip/netif.h"
+#include "lwip/etharp.h"
+#include "lwip/prot/acd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** ACD Timing
+ *  ACD_TMR_INTERVAL msecs, I recommend a value of 100.
+ *  The value must divide 1000 with a remainder almost 0. Possible values are
+ *  1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 ....
+ */
+#define ACD_TMR_INTERVAL      100
+
+/**
+ * Callback function: Handle conflict information from ACD module
+ *
+ * @param netif   network interface to handle conflict information on
+ * @param state   acd_callback_enum_t
+ */
+typedef void (*acd_conflict_callback_t)(struct netif *netif, acd_callback_enum_t state);
+
+/** ACD state information per netif */
+struct acd
+{
+  /** next acd module */
+  struct acd *next;
+  /** the currently selected, probed, announced or used IP-Address */
+  ip4_addr_t ipaddr;
+  /** current ACD state machine state */
+  acd_state_enum_t state;
+  /** sent number of probes or announces, dependent on state */
+  u8_t sent_num;
+  /** ticks to wait, tick is ACD_TMR_INTERVAL long */
+  u16_t ttw;
+  /** ticks until a conflict can again be solved by defending */
+  u8_t lastconflict;
+  /** total number of probed/used IP-Addresses that resulted in a conflict */
+  u8_t num_conflicts;
+  /** callback function -> let's the acd user know if the address is good or
+      if a conflict is detected */
+  acd_conflict_callback_t acd_conflict_callback;
+};
+
+err_t acd_add(struct netif *netif, struct acd *acd,
+              acd_conflict_callback_t acd_conflict_callback);
+void acd_remove(struct netif *netif, struct acd *acd);
+err_t acd_start(struct netif *netif, struct acd *acd, ip4_addr_t ipaddr);
+err_t acd_stop(struct acd *acd);
+void acd_arp_reply(struct netif *netif, struct etharp_hdr *hdr);
+void acd_tmr(void);
+void acd_network_changed_link_down(struct netif *netif);
+void acd_netif_ip_addr_changed(struct netif *netif, const ip_addr_t *old_addr,
+                               const ip_addr_t *new_addr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV4 && LWIP_ACD */
+
+#endif /* LWIP_HDR_ACD_H */

src/lwip/include/lwip/altcp.h

@@ -0,0 +1,207 @@
+/**
+ * @file
+ * Application layered TCP connection API (to be used from TCPIP thread)
+ *
+ * This file contains the generic API.
+ * For more details see @ref altcp_api.
+ */
+
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+#ifndef LWIP_HDR_ALTCP_H
+#define LWIP_HDR_ALTCP_H
+
+#include "lwip/opt.h"
+
+#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/tcpbase.h"
+#include "lwip/err.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct altcp_pcb;
+struct altcp_functions;
+
+typedef err_t (*altcp_accept_fn)(void *arg, struct altcp_pcb *new_conn, err_t err);
+typedef err_t (*altcp_connected_fn)(void *arg, struct altcp_pcb *conn, err_t err);
+typedef err_t (*altcp_recv_fn)(void *arg, struct altcp_pcb *conn, struct pbuf *p, err_t err);
+typedef err_t (*altcp_sent_fn)(void *arg, struct altcp_pcb *conn, u16_t len);
+typedef err_t (*altcp_poll_fn)(void *arg, struct altcp_pcb *conn);
+typedef void  (*altcp_err_fn)(void *arg, err_t err);
+
+typedef struct altcp_pcb* (*altcp_new_fn)(void *arg, u8_t ip_type);
+
+struct altcp_pcb {
+  const struct altcp_functions *fns;
+  struct altcp_pcb *inner_conn;
+  void *arg;
+  void *state;
+  /* application callbacks */
+  altcp_accept_fn     accept;
+  altcp_connected_fn  connected;
+  altcp_recv_fn       recv;
+  altcp_sent_fn       sent;
+  altcp_poll_fn       poll;
+  altcp_err_fn        err;
+  u8_t pollinterval;
+};
+
+/** @ingroup altcp
+ *  Struct containing an allocator and its state. */
+typedef struct altcp_allocator_s {
+  /** Allocator function */
+  altcp_new_fn  alloc;
+  /** Argument to allocator function */
+  void         *arg;
+} altcp_allocator_t;
+
+struct altcp_pcb *altcp_new(altcp_allocator_t *allocator);
+struct altcp_pcb *altcp_new_ip6(altcp_allocator_t *allocator);
+struct altcp_pcb *altcp_new_ip_type(altcp_allocator_t *allocator, u8_t ip_type);
+
+void altcp_arg(struct altcp_pcb *conn, void *arg);
+void altcp_accept(struct altcp_pcb *conn, altcp_accept_fn accept);
+void altcp_recv(struct altcp_pcb *conn, altcp_recv_fn recv);
+void altcp_sent(struct altcp_pcb *conn, altcp_sent_fn sent);
+void altcp_poll(struct altcp_pcb *conn, altcp_poll_fn poll, u8_t interval);
+void altcp_err(struct altcp_pcb *conn, altcp_err_fn err);
+
+void  altcp_recved(struct altcp_pcb *conn, u16_t len);
+err_t altcp_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port);
+err_t altcp_connect(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected);
+
+/* return conn for source code compatibility to tcp callback API only */
+struct altcp_pcb *altcp_listen_with_backlog_and_err(struct altcp_pcb *conn, u8_t backlog, err_t *err);
+#define altcp_listen_with_backlog(conn, backlog) altcp_listen_with_backlog_and_err(conn, backlog, NULL)
+/** @ingroup altcp */
+#define altcp_listen(conn) altcp_listen_with_backlog_and_err(conn, TCP_DEFAULT_LISTEN_BACKLOG, NULL)
+
+void altcp_abort(struct altcp_pcb *conn);
+err_t altcp_close(struct altcp_pcb *conn);
+err_t altcp_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx);
+
+err_t altcp_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags);
+err_t altcp_output(struct altcp_pcb *conn);
+
+u16_t altcp_mss(struct altcp_pcb *conn);
+u16_t altcp_sndbuf(struct altcp_pcb *conn);
+u16_t altcp_sndqueuelen(struct altcp_pcb *conn);
+void  altcp_nagle_disable(struct altcp_pcb *conn);
+void  altcp_nagle_enable(struct altcp_pcb *conn);
+int   altcp_nagle_disabled(struct altcp_pcb *conn);
+
+void  altcp_setprio(struct altcp_pcb *conn, u8_t prio);
+
+err_t altcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port);
+ip_addr_t *altcp_get_ip(struct altcp_pcb *conn, int local);
+u16_t altcp_get_port(struct altcp_pcb *conn, int local);
+
+#if LWIP_TCP_KEEPALIVE
+void  altcp_keepalive_disable(struct altcp_pcb *conn);
+void  altcp_keepalive_enable(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count);
+#endif
+
+#ifdef LWIP_DEBUG
+enum tcp_state altcp_dbg_get_tcp_state(struct altcp_pcb *conn);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#else /* LWIP_ALTCP */
+
+/* ALTCP disabled, define everything to link against tcp callback API (e.g. to get a small non-ssl httpd) */
+
+#include "lwip/tcp.h"
+
+#define altcp_accept_fn tcp_accept_fn
+#define altcp_connected_fn tcp_connected_fn
+#define altcp_recv_fn tcp_recv_fn
+#define altcp_sent_fn tcp_sent_fn
+#define altcp_poll_fn tcp_poll_fn
+#define altcp_err_fn tcp_err_fn
+
+#define altcp_pcb tcp_pcb
+#define altcp_tcp_new_ip_type tcp_new_ip_type
+#define altcp_tcp_new tcp_new
+#define altcp_tcp_new_ip6 tcp_new_ip6
+
+#define altcp_new(allocator) tcp_new()
+#define altcp_new_ip6(allocator) tcp_new_ip6()
+#define altcp_new_ip_type(allocator, ip_type) tcp_new_ip_type(ip_type)
+
+#define altcp_arg tcp_arg
+#define altcp_accept tcp_accept
+#define altcp_recv tcp_recv
+#define altcp_sent tcp_sent
+#define altcp_poll tcp_poll
+#define altcp_err tcp_err
+
+#define altcp_recved tcp_recved
+#define altcp_bind tcp_bind
+#define altcp_connect tcp_connect
+
+#define altcp_listen_with_backlog_and_err tcp_listen_with_backlog_and_err
+#define altcp_listen_with_backlog tcp_listen_with_backlog
+#define altcp_listen tcp_listen
+
+#define altcp_abort tcp_abort
+#define altcp_close tcp_close
+#define altcp_shutdown tcp_shutdown
+
+#define altcp_write tcp_write
+#define altcp_output tcp_output
+
+#define altcp_mss tcp_mss
+#define altcp_sndbuf tcp_sndbuf
+#define altcp_sndqueuelen tcp_sndqueuelen
+#define altcp_nagle_disable tcp_nagle_disable
+#define altcp_nagle_enable tcp_nagle_enable
+#define altcp_nagle_disabled tcp_nagle_disabled
+#define altcp_setprio tcp_setprio
+
+#define altcp_get_tcp_addrinfo tcp_get_tcp_addrinfo
+#define altcp_get_ip(pcb, local) ((local) ? (&(pcb)->local_ip) : (&(pcb)->remote_ip))
+
+#ifdef LWIP_DEBUG
+#define altcp_dbg_get_tcp_state tcp_dbg_get_tcp_state
+#endif
+
+#endif /* LWIP_ALTCP */
+
+#endif /* LWIP_HDR_ALTCP_H */

src/lwip/include/lwip/altcp_tcp.h

@@ -0,0 +1,72 @@
+/**
+ * @file
+ * Application layered TCP connection API (to be used from TCPIP thread)<br>
+ * This interface mimics the tcp callback API to the application while preventing
+ * direct linking (much like virtual functions).
+ * This way, an application can make use of other application layer protocols
+ * on top of TCP without knowing the details (e.g. TLS, proxy connection).
+ *
+ * This file contains the base implementation calling into tcp.
+ */
+
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+#ifndef LWIP_HDR_ALTCP_TCP_H
+#define LWIP_HDR_ALTCP_TCP_H
+
+#include "lwip/opt.h"
+
+#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/altcp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct altcp_pcb *altcp_tcp_new_ip_type(u8_t ip_type);
+
+#define altcp_tcp_new() altcp_tcp_new_ip_type(IPADDR_TYPE_V4)
+#define altcp_tcp_new_ip6() altcp_tcp_new_ip_type(IPADDR_TYPE_V6)
+
+struct altcp_pcb *altcp_tcp_alloc(void *arg, u8_t ip_type);
+
+struct tcp_pcb;
+struct altcp_pcb *altcp_tcp_wrap(struct tcp_pcb *tpcb);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ALTCP */
+
+#endif /* LWIP_HDR_ALTCP_TCP_H */

src/lwip/include/lwip/altcp_tls.h

@@ -0,0 +1,196 @@
+/**
+ * @file
+ * Application layered TCP/TLS connection API (to be used from TCPIP thread)
+ *
+ * @defgroup altcp_tls TLS layer
+ * @ingroup altcp
+ * This file contains function prototypes for a TLS layer.
+ * A port to ARM mbedtls is provided in the apps/ tree
+ * (LWIP_ALTCP_TLS_MBEDTLS option).
+ */
+
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+#ifndef LWIP_HDR_ALTCP_TLS_H
+#define LWIP_HDR_ALTCP_TLS_H
+
+#include "lwip/opt.h"
+
+#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
+
+#if LWIP_ALTCP_TLS
+
+#include "lwip/altcp.h"
+
+/* check if mbedtls port is enabled */
+#include "lwip/apps/altcp_tls_mbedtls_opts.h"
+/* allow session structure to be fully defined when using mbedtls port */
+#if LWIP_ALTCP_TLS_MBEDTLS
+#include "mbedtls/ssl.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @ingroup altcp_tls
+ * ALTCP_TLS configuration handle, content depends on port (e.g. mbedtls)
+ */
+struct altcp_tls_config;
+
+/** @ingroup altcp_tls
+ * Create an ALTCP_TLS server configuration handle prepared for multiple certificates
+ */
+struct altcp_tls_config *altcp_tls_create_config_server(u8_t cert_count);
+
+/** @ingroup altcp_tls
+ * Add a certificate to an ALTCP_TLS server configuration handle
+ */
+err_t altcp_tls_config_server_add_privkey_cert(struct altcp_tls_config *config,
+      const u8_t *privkey, size_t privkey_len,
+      const u8_t *privkey_pass, size_t privkey_pass_len,
+      const u8_t *cert, size_t cert_len);
+
+/** @ingroup altcp_tls
+ * Create an ALTCP_TLS server configuration handle with one certificate
+ * (short version of calling @ref altcp_tls_create_config_server and
+ * @ref altcp_tls_config_server_add_privkey_cert)
+ */
+struct altcp_tls_config *altcp_tls_create_config_server_privkey_cert(const u8_t *privkey, size_t privkey_len,
+                            const u8_t *privkey_pass, size_t privkey_pass_len,
+                            const u8_t *cert, size_t cert_len);
+
+/** @ingroup altcp_tls
+ * Create an ALTCP_TLS client configuration handle
+ */
+struct altcp_tls_config *altcp_tls_create_config_client(const u8_t *cert, size_t cert_len);
+
+/** @ingroup altcp_tls
+ * Create an ALTCP_TLS client configuration handle with two-way server/client authentication
+ */
+struct altcp_tls_config *altcp_tls_create_config_client_2wayauth(const u8_t *ca, size_t ca_len, const u8_t *privkey, size_t privkey_len,
+                            const u8_t *privkey_pass, size_t privkey_pass_len,
+                            const u8_t *cert, size_t cert_len);
+
+/** @ingroup altcp_tls
+ * Configure ALPN TLS extension
+ * Example:<br>
+ * static const char *g_alpn_protocols[] = { "x-amzn-mqtt-ca", NULL };<br>
+ * tls_config = altcp_tls_create_config_client(ca, ca_len);<br>
+ * altcp_tls_conf_alpn_protocols(tls_config, g_alpn_protocols);<br>
+ */
+int altcp_tls_configure_alpn_protocols(struct altcp_tls_config *conf, const char **protos);
+
+/** @ingroup altcp_tls
+ * Free an ALTCP_TLS configuration handle
+ */
+void altcp_tls_free_config(struct altcp_tls_config *conf);
+
+/** @ingroup altcp_tls
+ * Free an ALTCP_TLS global entropy instance.
+ * All ALTCP_TLS configuration are linked to one altcp_tls_entropy_rng structure
+ * that handle an unique system entropy & ctr_drbg instance.
+ * This function allow application to free this altcp_tls_entropy_rng structure
+ * when all configuration referencing it were destroyed.
+ * This function does nothing if some ALTCP_TLS configuration handle are still
+ * active.
+ */
+void altcp_tls_free_entropy(void);
+
+/** @ingroup altcp_tls
+ * Create new ALTCP_TLS layer wrapping an existing pcb as inner connection (e.g. TLS over TCP)
+ */
+struct altcp_pcb *altcp_tls_wrap(struct altcp_tls_config *config, struct altcp_pcb *inner_pcb);
+
+/** @ingroup altcp_tls
+ * Create new ALTCP_TLS pcb and its inner tcp pcb
+ */
+struct altcp_pcb *altcp_tls_new(struct altcp_tls_config *config, u8_t ip_type);
+
+/** @ingroup altcp_tls
+ * Create new ALTCP_TLS layer pcb and its inner tcp pcb.
+ * Same as @ref altcp_tls_new but this allocator function fits to
+ * @ref altcp_allocator_t / @ref altcp_new.<br>
+ 'arg' must contain a struct altcp_tls_config *.
+ */
+struct altcp_pcb *altcp_tls_alloc(void *arg, u8_t ip_type);
+
+/** @ingroup altcp_tls
+ * Return pointer to internal TLS context so application can tweak it.
+ * Real type depends on port (e.g. mbedtls)
+ */
+void *altcp_tls_context(struct altcp_pcb *conn);
+
+/** @ingroup altcp_tls
+ * ALTCP_TLS session handle, content depends on port (e.g. mbedtls)
+ */
+struct altcp_tls_session
+#if LWIP_ALTCP_TLS_MBEDTLS
+{
+    mbedtls_ssl_session data;
+}
+#endif
+;
+
+/** @ingroup altcp_tls
+ * Initialise a TLS session buffer.
+ * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session)
+ */
+void altcp_tls_init_session(struct altcp_tls_session *dest);
+
+/** @ingroup altcp_tls
+ * Save current connected session to reuse it later. Should be called after altcp_connect() succeeded.
+ * Return error if saving session fail.
+ * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session)
+ */
+err_t altcp_tls_get_session(struct altcp_pcb *conn, struct altcp_tls_session *dest);
+
+/** @ingroup altcp_tls
+ * Restore a previously saved session. Must be called before altcp_connect().
+ * Return error if cannot restore session.
+ * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session)
+ */
+err_t altcp_tls_set_session(struct altcp_pcb *conn, struct altcp_tls_session *from);
+
+/** @ingroup altcp_tls
+ * Free allocated data inside a TLS session buffer.
+ * Real type depends on port (e.g. mbedtls use mbedtls_ssl_session)
+ */
+void altcp_tls_free_session(struct altcp_tls_session *dest);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ALTCP_TLS */
+#endif /* LWIP_ALTCP */
+#endif /* LWIP_HDR_ALTCP_TLS_H */

src/lwip/include/lwip/api.h

@@ -0,0 +1,434 @@
+/**
+ * @file
+ * netconn API (to be used from non-TCPIP threads)
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_API_H
+#define LWIP_HDR_API_H
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
+/* Note: Netconn API is always available when sockets are enabled -
+ * sockets are implemented on top of them */
+
+#include "lwip/arch.h"
+#include "lwip/netbuf.h"
+#include "lwip/sys.h"
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Throughout this file, IP addresses and port numbers are expected to be in
+ * the same byte order as in the corresponding pcb.
+ */
+
+/* Flags for netconn_write (u8_t) */
+#define NETCONN_NOFLAG      0x00
+#define NETCONN_NOCOPY      0x00 /* Only for source code compatibility */
+#define NETCONN_COPY        0x01
+#define NETCONN_MORE        0x02
+#define NETCONN_DONTBLOCK   0x04
+#define NETCONN_NOAUTORCVD  0x08 /* prevent netconn_recv_data_tcp() from updating the tcp window - must be done manually via netconn_tcp_recvd() */
+#define NETCONN_NOFIN       0x10 /* upper layer already received data, leave FIN in queue until called again */
+
+/* Flags for struct netconn.flags (u8_t) */
+/** This netconn had an error, don't block on recvmbox/acceptmbox any more */
+#define NETCONN_FLAG_MBOXCLOSED               0x01
+/** Should this netconn avoid blocking? */
+#define NETCONN_FLAG_NON_BLOCKING             0x02
+/** Was the last connect action a non-blocking one? */
+#define NETCONN_FLAG_IN_NONBLOCKING_CONNECT   0x04
+#if LWIP_NETCONN_FULLDUPLEX
+  /** The mbox of this netconn is being deallocated, don't use it anymore */
+#define NETCONN_FLAG_MBOXINVALID              0x08
+#endif /* LWIP_NETCONN_FULLDUPLEX */
+/** If a nonblocking write has been rejected before, poll_tcp needs to
+    check if the netconn is writable again */
+#define NETCONN_FLAG_CHECK_WRITESPACE         0x10
+#if LWIP_IPV6
+/** If this flag is set then only IPv6 communication is allowed on the
+    netconn. As per RFC#3493 this features defaults to OFF allowing
+    dual-stack usage by default. */
+#define NETCONN_FLAG_IPV6_V6ONLY              0x20
+#endif /* LWIP_IPV6 */
+#if LWIP_NETBUF_RECVINFO
+/** Received packet info will be recorded for this netconn */
+#define NETCONN_FLAG_PKTINFO                  0x40
+#endif /* LWIP_NETBUF_RECVINFO */
+/** A FIN has been received but not passed to the application yet */
+#define NETCONN_FIN_RX_PENDING                0x80
+
+/* Helpers to process several netconn_types by the same code */
+#define NETCONNTYPE_GROUP(t)         ((t)&0xF0)
+#define NETCONNTYPE_DATAGRAM(t)      ((t)&0xE0)
+#if LWIP_IPV6
+#define NETCONN_TYPE_IPV6            0x08
+#define NETCONNTYPE_ISIPV6(t)        (((t)&NETCONN_TYPE_IPV6) != 0)
+#define NETCONNTYPE_ISUDPLITE(t)     (((t)&0xF3) == NETCONN_UDPLITE)
+#define NETCONNTYPE_ISUDPNOCHKSUM(t) (((t)&0xF3) == NETCONN_UDPNOCHKSUM)
+#else /* LWIP_IPV6 */
+#define NETCONNTYPE_ISIPV6(t)        (0)
+#define NETCONNTYPE_ISUDPLITE(t)     ((t) == NETCONN_UDPLITE)
+#define NETCONNTYPE_ISUDPNOCHKSUM(t) ((t) == NETCONN_UDPNOCHKSUM)
+#endif /* LWIP_IPV6 */
+
+/** @ingroup netconn_common
+ * Protocol family and type of the netconn
+ */
+enum netconn_type {
+  NETCONN_INVALID     = 0,
+  /** TCP IPv4 */
+  NETCONN_TCP         = 0x10,
+#if LWIP_IPV6
+  /** TCP IPv6 */
+  NETCONN_TCP_IPV6    = NETCONN_TCP | NETCONN_TYPE_IPV6 /* 0x18 */,
+#endif /* LWIP_IPV6 */
+  /** UDP IPv4 */
+  NETCONN_UDP         = 0x20,
+  /** UDP IPv4 lite */
+  NETCONN_UDPLITE     = 0x21,
+  /** UDP IPv4 no checksum */
+  NETCONN_UDPNOCHKSUM = 0x22,
+
+#if LWIP_IPV6
+  /** UDP IPv6 (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
+  NETCONN_UDP_IPV6         = NETCONN_UDP | NETCONN_TYPE_IPV6 /* 0x28 */,
+  /** UDP IPv6 lite (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
+  NETCONN_UDPLITE_IPV6     = NETCONN_UDPLITE | NETCONN_TYPE_IPV6 /* 0x29 */,
+  /** UDP IPv6 no checksum (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
+  NETCONN_UDPNOCHKSUM_IPV6 = NETCONN_UDPNOCHKSUM | NETCONN_TYPE_IPV6 /* 0x2a */,
+#endif /* LWIP_IPV6 */
+
+  /** Raw connection IPv4 */
+  NETCONN_RAW         = 0x40
+#if LWIP_IPV6
+  /** Raw connection IPv6 (dual-stack by default, unless you call @ref netconn_set_ipv6only) */
+  , NETCONN_RAW_IPV6    = NETCONN_RAW | NETCONN_TYPE_IPV6 /* 0x48 */
+#endif /* LWIP_IPV6 */
+};
+
+/** Current state of the netconn. Non-TCP netconns are always
+ * in state NETCONN_NONE! */
+enum netconn_state {
+  NETCONN_NONE,
+  NETCONN_WRITE,
+  NETCONN_LISTEN,
+  NETCONN_CONNECT,
+  NETCONN_CLOSE
+};
+
+/** Used to inform the callback function about changes
+ *
+ * Event explanation:
+ *
+ * In the netconn implementation, there are three ways to block a client:
+ *
+ * - accept mbox (sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, 0); in netconn_accept())
+ * - receive mbox (sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0); in netconn_recv_data())
+ * - send queue is full (sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); in lwip_netconn_do_write())
+ *
+ * The events have to be seen as events signaling the state of these mboxes/semaphores. For non-blocking
+ * connections, you need to know in advance whether a call to a netconn function call would block or not,
+ * and these events tell you about that.
+ *
+ * RCVPLUS events say: Safe to perform a potentially blocking call call once more.
+ * They are counted in sockets - three RCVPLUS events for accept mbox means you are safe
+ * to call netconn_accept 3 times without being blocked.
+ * Same thing for receive mbox.
+ *
+ * RCVMINUS events say: Your call to to a possibly blocking function is "acknowledged".
+ * Socket implementation decrements the counter.
+ *
+ * For TX, there is no need to count, its merely a flag. SENDPLUS means you may send something.
+ * SENDPLUS occurs when enough data was delivered to peer so netconn_send() can be called again.
+ * A SENDMINUS event occurs when the next call to a netconn_send() would be blocking.
+ */
+enum netconn_evt {
+  NETCONN_EVT_RCVPLUS,
+  NETCONN_EVT_RCVMINUS,
+  NETCONN_EVT_SENDPLUS,
+  NETCONN_EVT_SENDMINUS,
+  NETCONN_EVT_ERROR
+};
+
+#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
+/** Used for netconn_join_leave_group() */
+enum netconn_igmp {
+  NETCONN_JOIN,
+  NETCONN_LEAVE
+};
+#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
+
+#if LWIP_DNS
+/* Used for netconn_gethostbyname_addrtype(), these should match the DNS_ADDRTYPE defines in dns.h */
+#define NETCONN_DNS_DEFAULT   NETCONN_DNS_IPV4_IPV6
+#define NETCONN_DNS_IPV4      0
+#define NETCONN_DNS_IPV6      1
+#define NETCONN_DNS_IPV4_IPV6 2 /* try to resolve IPv4 first, try IPv6 if IPv4 fails only */
+#define NETCONN_DNS_IPV6_IPV4 3 /* try to resolve IPv6 first, try IPv4 if IPv6 fails only */
+#endif /* LWIP_DNS */
+
+/* forward-declare some structs to avoid to include their headers */
+struct ip_pcb;
+struct tcp_pcb;
+struct udp_pcb;
+struct raw_pcb;
+struct netconn;
+struct api_msg;
+
+/** A callback prototype to inform about events for a netconn */
+typedef void (* netconn_callback)(struct netconn *, enum netconn_evt, u16_t len);
+
+/** A netconn descriptor */
+struct netconn {
+  /** type of the netconn (TCP, UDP or RAW) */
+  enum netconn_type type;
+  /** current state of the netconn */
+  enum netconn_state state;
+  /** the lwIP internal protocol control block */
+  union {
+    struct ip_pcb  *ip;
+    struct tcp_pcb *tcp;
+    struct udp_pcb *udp;
+    struct raw_pcb *raw;
+  } pcb;
+  /** the last asynchronous unreported error this netconn had */
+  err_t pending_err;
+#if !LWIP_NETCONN_SEM_PER_THREAD
+  /** sem that is used to synchronously execute functions in the core context */
+  sys_sem_t op_completed;
+#endif
+  /** mbox where received packets are stored until they are fetched
+      by the netconn application thread (can grow quite big) */
+  sys_mbox_t recvmbox;
+#if LWIP_TCP
+  /** mbox where new connections are stored until processed
+      by the application thread */
+  sys_mbox_t acceptmbox;
+#endif /* LWIP_TCP */
+#if LWIP_NETCONN_FULLDUPLEX
+  /** number of threads waiting on an mbox. This is required to unblock
+      all threads when closing while threads are waiting. */
+  int mbox_threads_waiting;
+#endif
+  union {
+    int socket;
+    void *ptr;
+  } callback_arg;
+#if LWIP_SO_SNDTIMEO
+  /** timeout to wait for sending data (which means enqueueing data for sending
+      in internal buffers) in milliseconds */
+  s32_t send_timeout;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVTIMEO
+  /** timeout in milliseconds to wait for new data to be received
+      (or connections to arrive for listening netconns) */
+  u32_t recv_timeout;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+  /** maximum amount of bytes queued in recvmbox
+      not used for TCP: adjust TCP_WND instead! */
+  int recv_bufsize;
+  /** number of bytes currently in recvmbox to be received,
+      tested against recv_bufsize to limit bytes on recvmbox
+      for UDP and RAW, used for FIONREAD */
+  int recv_avail;
+#endif /* LWIP_SO_RCVBUF */
+#if LWIP_SO_LINGER
+   /** values <0 mean linger is disabled, values > 0 are seconds to linger */
+  s16_t linger;
+#endif /* LWIP_SO_LINGER */
+  /** flags holding more netconn-internal state, see NETCONN_FLAG_* defines */
+  u8_t flags;
+#if LWIP_TCP
+  /** TCP: when data passed to netconn_write doesn't fit into the send buffer,
+      this temporarily stores the message.
+      Also used during connect and close. */
+  struct api_msg *current_msg;
+#endif /* LWIP_TCP */
+  /** A callback function that is informed about events for this netconn */
+  netconn_callback callback;
+};
+
+/** This vector type is passed to @ref netconn_write_vectors_partly to send
+ * multiple buffers at once.
+ * ATTENTION: This type has to directly map struct iovec since one is casted
+ *            into the other!
+ */
+struct netvector {
+  /** pointer to the application buffer that contains the data to send */
+  const void *ptr;
+  /** size of the application data to send */
+  size_t len;
+};
+
+/** Register an Network connection event */
+#define API_EVENT(c,e,l) if (c->callback) {         \
+                           (*c->callback)(c, e, l); \
+                         }
+
+/* Network connection functions: */
+
+/** @ingroup netconn_common
+ * Create new netconn connection
+ * @param t @ref netconn_type */
+#define netconn_new(t)                  netconn_new_with_proto_and_callback(t, 0, NULL)
+#define netconn_new_with_callback(t, c) netconn_new_with_proto_and_callback(t, 0, c)
+struct netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto,
+                                             netconn_callback callback);
+err_t   netconn_prepare_delete(struct netconn *conn);
+err_t   netconn_delete(struct netconn *conn);
+/** Get the type of a netconn (as enum netconn_type). */
+#define netconn_type(conn) (conn->type)
+
+err_t   netconn_getaddr(struct netconn *conn, ip_addr_t *addr,
+                        u16_t *port, u8_t local);
+/** @ingroup netconn_common */
+#define netconn_peer(c,i,p) netconn_getaddr(c,i,p,0)
+/** @ingroup netconn_common */
+#define netconn_addr(c,i,p) netconn_getaddr(c,i,p,1)
+
+err_t   netconn_bind(struct netconn *conn, const ip_addr_t *addr, u16_t port);
+err_t   netconn_bind_if(struct netconn *conn, u8_t if_idx);
+err_t   netconn_connect(struct netconn *conn, const ip_addr_t *addr, u16_t port);
+err_t   netconn_disconnect (struct netconn *conn);
+err_t   netconn_listen_with_backlog(struct netconn *conn, u8_t backlog);
+/** @ingroup netconn_tcp */
+#define netconn_listen(conn) netconn_listen_with_backlog(conn, TCP_DEFAULT_LISTEN_BACKLOG)
+err_t   netconn_accept(struct netconn *conn, struct netconn **new_conn);
+err_t   netconn_recv(struct netconn *conn, struct netbuf **new_buf);
+err_t   netconn_recv_udp_raw_netbuf(struct netconn *conn, struct netbuf **new_buf);
+err_t   netconn_recv_udp_raw_netbuf_flags(struct netconn *conn, struct netbuf **new_buf, u8_t apiflags);
+err_t   netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf);
+err_t   netconn_recv_tcp_pbuf_flags(struct netconn *conn, struct pbuf **new_buf, u8_t apiflags);
+err_t   netconn_tcp_recvd(struct netconn *conn, size_t len);
+err_t   netconn_sendto(struct netconn *conn, struct netbuf *buf,
+                             const ip_addr_t *addr, u16_t port);
+err_t   netconn_send(struct netconn *conn, struct netbuf *buf);
+err_t   netconn_write_partly(struct netconn *conn, const void *dataptr, size_t size,
+                             u8_t apiflags, size_t *bytes_written);
+err_t   netconn_write_vectors_partly(struct netconn *conn, struct netvector *vectors, u16_t vectorcnt,
+                                     u8_t apiflags, size_t *bytes_written);
+/** @ingroup netconn_tcp */
+#define netconn_write(conn, dataptr, size, apiflags) \
+          netconn_write_partly(conn, dataptr, size, apiflags, NULL)
+err_t   netconn_close(struct netconn *conn);
+err_t   netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx);
+
+#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
+err_t   netconn_join_leave_group(struct netconn *conn, const ip_addr_t *multiaddr,
+                             const ip_addr_t *netif_addr, enum netconn_igmp join_or_leave);
+err_t   netconn_join_leave_group_netif(struct netconn *conn, const ip_addr_t *multiaddr,
+                             u8_t if_idx, enum netconn_igmp join_or_leave);
+#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
+#if LWIP_DNS
+#if LWIP_IPV4 && LWIP_IPV6
+err_t   netconn_gethostbyname_addrtype(const char *name, ip_addr_t *addr, u8_t dns_addrtype);
+#define netconn_gethostbyname(name, addr) netconn_gethostbyname_addrtype(name, addr, NETCONN_DNS_DEFAULT)
+#else /* LWIP_IPV4 && LWIP_IPV6 */
+err_t   netconn_gethostbyname(const char *name, ip_addr_t *addr);
+#define netconn_gethostbyname_addrtype(name, addr, dns_addrtype) netconn_gethostbyname(name, addr)
+#endif /* LWIP_IPV4 && LWIP_IPV6 */
+#endif /* LWIP_DNS */
+
+err_t   netconn_err(struct netconn *conn);
+#define netconn_recv_bufsize(conn)      ((conn)->recv_bufsize)
+
+#define netconn_set_flags(conn, set_flags)     do { (conn)->flags = (u8_t)((conn)->flags |  (set_flags)); } while(0)
+#define netconn_clear_flags(conn, clr_flags)   do { (conn)->flags = (u8_t)((conn)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0)
+#define netconn_is_flag_set(conn, flag)        (((conn)->flags & (flag)) != 0)
+
+#define netconn_set_callback_arg(conn, arg)   do { (conn)->callback_arg.ptr = (arg); } while(0)
+#define netconn_get_callback_arg(conn)        ((conn)->callback_arg.ptr)
+
+/** Set the blocking status of netconn calls (@todo: write/send is missing) */
+#define netconn_set_nonblocking(conn, val)  do { if(val) { \
+  netconn_set_flags(conn, NETCONN_FLAG_NON_BLOCKING); \
+} else { \
+  netconn_clear_flags(conn, NETCONN_FLAG_NON_BLOCKING); }} while(0)
+/** Get the blocking status of netconn calls (@todo: write/send is missing) */
+#define netconn_is_nonblocking(conn)        (((conn)->flags & NETCONN_FLAG_NON_BLOCKING) != 0)
+
+#if LWIP_IPV6
+/** @ingroup netconn_common
+ * TCP: Set the IPv6 ONLY status of netconn calls (see NETCONN_FLAG_IPV6_V6ONLY)
+ */
+#define netconn_set_ipv6only(conn, val)  do { if(val) { \
+  netconn_set_flags(conn, NETCONN_FLAG_IPV6_V6ONLY); \
+} else { \
+  netconn_clear_flags(conn, NETCONN_FLAG_IPV6_V6ONLY); }} while(0)
+/** @ingroup netconn_common
+ * TCP: Get the IPv6 ONLY status of netconn calls (see NETCONN_FLAG_IPV6_V6ONLY)
+ */
+#define netconn_get_ipv6only(conn)        (((conn)->flags & NETCONN_FLAG_IPV6_V6ONLY) != 0)
+#endif /* LWIP_IPV6 */
+
+#if LWIP_SO_SNDTIMEO
+/** Set the send timeout in milliseconds */
+#define netconn_set_sendtimeout(conn, timeout)      ((conn)->send_timeout = (timeout))
+/** Get the send timeout in milliseconds */
+#define netconn_get_sendtimeout(conn)               ((conn)->send_timeout)
+#endif /* LWIP_SO_SNDTIMEO */
+#if LWIP_SO_RCVTIMEO
+/** Set the receive timeout in milliseconds */
+#define netconn_set_recvtimeout(conn, timeout)      ((conn)->recv_timeout = (timeout))
+/** Get the receive timeout in milliseconds */
+#define netconn_get_recvtimeout(conn)               ((conn)->recv_timeout)
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+/** Set the receive buffer in bytes */
+#define netconn_set_recvbufsize(conn, recvbufsize)  ((conn)->recv_bufsize = (recvbufsize))
+/** Get the receive buffer in bytes */
+#define netconn_get_recvbufsize(conn)               ((conn)->recv_bufsize)
+#endif /* LWIP_SO_RCVBUF*/
+
+#if LWIP_NETCONN_SEM_PER_THREAD
+void netconn_thread_init(void);
+void netconn_thread_cleanup(void);
+#else /* LWIP_NETCONN_SEM_PER_THREAD */
+#define netconn_thread_init()
+#define netconn_thread_cleanup()
+#endif /* LWIP_NETCONN_SEM_PER_THREAD */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_NETCONN || LWIP_SOCKET */
+
+#endif /* LWIP_HDR_API_H */

src/lwip/include/lwip/apps/FILES

@@ -0,0 +1,2 @@
+This directory contains application headers.
+Every application shall provide one api file APP.h and optionally one options file APP_opts.h

src/lwip/include/lwip/apps/altcp_proxyconnect.h

@@ -0,0 +1,79 @@
+/**
+ * @file
+ * Application layered TCP connection API that executes a proxy-connect.
+ *
+ * This file provides a starting layer that executes a proxy-connect e.g. to
+ * set up TLS connections through a http proxy.
+ */
+
+/*
+ * Copyright (c) 2018 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H
+#define LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H
+
+#include "lwip/opt.h"
+
+#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct altcp_proxyconnect_config {
+  ip_addr_t proxy_addr;
+  u16_t proxy_port;
+};
+
+
+struct altcp_pcb *altcp_proxyconnect_new(struct altcp_proxyconnect_config *config, struct altcp_pcb *inner_pcb);
+struct altcp_pcb *altcp_proxyconnect_new_tcp(struct altcp_proxyconnect_config *config, u8_t ip_type);
+
+struct altcp_pcb *altcp_proxyconnect_alloc(void *arg, u8_t ip_type);
+
+#if LWIP_ALTCP_TLS
+struct altcp_proxyconnect_tls_config {
+  struct altcp_proxyconnect_config proxy;
+  struct altcp_tls_config *tls_config;
+};
+
+struct altcp_pcb *altcp_proxyconnect_tls_alloc(void *arg, u8_t ip_type);
+#endif /* LWIP_ALTCP_TLS */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ALTCP */
+#endif /* LWIP_HDR_APPS_ALTCP_PROXYCONNECT_H */

src/lwip/include/lwip/apps/altcp_tls_mbedtls_opts.h

@@ -0,0 +1,111 @@
+/**
+ * @file
+ * Application layered TCP/TLS connection API (to be used from TCPIP thread)
+ *
+ * This file contains options for an mbedtls port of the TLS layer.
+ */
+
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+#ifndef LWIP_HDR_ALTCP_TLS_OPTS_H
+#define LWIP_HDR_ALTCP_TLS_OPTS_H
+
+#include "lwip/opt.h"
+
+#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
+
+/** LWIP_ALTCP_TLS_MBEDTLS==1: use mbedTLS for TLS support for altcp API
+ * mbedtls include directory must be reachable via include search path
+ */
+#ifndef LWIP_ALTCP_TLS_MBEDTLS
+#define LWIP_ALTCP_TLS_MBEDTLS                        0
+#endif
+
+/** Configure debug level of this file */
+#ifndef ALTCP_MBEDTLS_DEBUG
+#define ALTCP_MBEDTLS_DEBUG                           LWIP_DBG_OFF
+#endif
+
+/** Configure lwIP debug level of the mbedTLS library */
+#ifndef ALTCP_MBEDTLS_LIB_DEBUG
+#define ALTCP_MBEDTLS_LIB_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/** Configure minimum internal debug level of the mbedTLS library */
+#ifndef ALTCP_MBEDTLS_LIB_DEBUG_LEVEL_MIN
+#define ALTCP_MBEDTLS_LIB_DEBUG_LEVEL_MIN             0
+#endif
+
+/** Enable the basic session cache
+ * ATTENTION: Using a session cache can lower security by reusing keys!
+ */
+#ifndef ALTCP_MBEDTLS_USE_SESSION_CACHE
+#define ALTCP_MBEDTLS_USE_SESSION_CACHE               0
+#endif
+
+/** Maximum cache size of the basic session cache */
+#ifndef ALTCP_MBEDTLS_SESSION_CACHE_SIZE
+#define ALTCP_MBEDTLS_SESSION_CACHE_SIZE              30
+#endif
+
+/** Set a session timeout in seconds for the basic session cache  */
+#ifndef ALTCP_MBEDTLS_SESSION_CACHE_TIMEOUT_SECONDS
+#define ALTCP_MBEDTLS_SESSION_CACHE_TIMEOUT_SECONDS   (60 * 60)
+#endif
+
+/** Use session tickets to speed up connection setup (needs
+ * MBEDTLS_SSL_SESSION_TICKETS enabled in mbedTLS config).
+ * ATTENTION: Using session tickets can lower security by reusing keys!
+ */
+#ifndef ALTCP_MBEDTLS_USE_SESSION_TICKETS
+#define ALTCP_MBEDTLS_USE_SESSION_TICKETS             0
+#endif
+
+/** Session ticket cipher */
+#ifndef ALTCP_MBEDTLS_SESSION_TICKET_CIPHER
+#define ALTCP_MBEDTLS_SESSION_TICKET_CIPHER           MBEDTLS_CIPHER_AES_256_GCM
+#endif
+
+/** Maximum timeout for session tickets */
+#ifndef ALTCP_MBEDTLS_SESSION_TICKET_TIMEOUT_SECONDS
+#define ALTCP_MBEDTLS_SESSION_TICKET_TIMEOUT_SECONDS  (60 * 60 * 24)
+#endif
+
+/** Certificate verification mode: MBEDTLS_SSL_VERIFY_NONE, MBEDTLS_SSL_VERIFY_OPTIONAL (default),
+ * MBEDTLS_SSL_VERIFY_REQUIRED (recommended)*/
+#ifndef ALTCP_MBEDTLS_AUTHMODE
+#define ALTCP_MBEDTLS_AUTHMODE                        MBEDTLS_SSL_VERIFY_OPTIONAL
+#endif
+
+#endif /* LWIP_ALTCP */
+
+#endif /* LWIP_HDR_ALTCP_TLS_OPTS_H */

src/lwip/include/lwip/apps/fs.h

@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_APPS_FS_H
+#define LWIP_HDR_APPS_FS_H
+
+#include "httpd_opts.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FS_READ_EOF     -1
+#define FS_READ_DELAYED -2
+
+#if HTTPD_PRECALCULATED_CHECKSUM
+struct fsdata_chksum {
+  u32_t offset;
+  u16_t chksum;
+  u16_t len;
+};
+#endif /* HTTPD_PRECALCULATED_CHECKSUM */
+
+#define FS_FILE_FLAGS_HEADER_INCLUDED     0x01
+#define FS_FILE_FLAGS_HEADER_PERSISTENT   0x02
+#define FS_FILE_FLAGS_HEADER_HTTPVER_1_1  0x04
+#define FS_FILE_FLAGS_SSI                 0x08
+#define FS_FILE_FLAGS_CUSTOM              0x10
+
+/** Define FS_FILE_EXTENSION_T_DEFINED if you have typedef'ed to your private
+ * pointer type (defaults to 'void' so the default usage is 'void*')
+ */
+#ifndef FS_FILE_EXTENSION_T_DEFINED
+typedef void fs_file_extension;
+#endif
+
+struct fs_file {
+  const char *data;
+  int len;
+  int index;
+#if LWIP_HTTPD_FILE_EXTENSION
+  /* pextension is free for implementations to hold private (extensional)
+     arbitrary data, e.g. holding some file state or file system handle */
+  fs_file_extension *pextension;
+#endif /* LWIP_HTTPD_FILE_EXTENSION */
+#if HTTPD_PRECALCULATED_CHECKSUM
+  const struct fsdata_chksum *chksum;
+  u16_t chksum_count;
+#endif /* HTTPD_PRECALCULATED_CHECKSUM */
+  u8_t flags;
+#if LWIP_HTTPD_FILE_STATE
+  void *state;
+#endif /* LWIP_HTTPD_FILE_STATE */
+};
+
+#if LWIP_HTTPD_FS_ASYNC_READ
+typedef void (*fs_wait_cb)(void *arg);
+#endif /* LWIP_HTTPD_FS_ASYNC_READ */
+
+err_t fs_open(struct fs_file *file, const char *name);
+void fs_close(struct fs_file *file);
+#if LWIP_HTTPD_DYNAMIC_FILE_READ
+#if LWIP_HTTPD_FS_ASYNC_READ
+int fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
+#else /* LWIP_HTTPD_FS_ASYNC_READ */
+int fs_read(struct fs_file *file, char *buffer, int count);
+#endif /* LWIP_HTTPD_FS_ASYNC_READ */
+#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
+#if LWIP_HTTPD_FS_ASYNC_READ
+int fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
+#endif /* LWIP_HTTPD_FS_ASYNC_READ */
+int fs_bytes_left(struct fs_file *file);
+
+#if LWIP_HTTPD_FILE_STATE
+/** This user-defined function is called when a file is opened. */
+void *fs_state_init(struct fs_file *file, const char *name);
+/** This user-defined function is called when a file is closed. */
+void fs_state_free(struct fs_file *file, void *state);
+#endif /* #if LWIP_HTTPD_FILE_STATE */
+
+struct fsdata_file {
+  const struct fsdata_file *next;
+  const unsigned char *name;
+  const unsigned char *data;
+  int len;
+  u8_t flags;
+#if HTTPD_PRECALCULATED_CHECKSUM
+  u16_t chksum_count;
+  const struct fsdata_chksum *chksum;
+#endif /* HTTPD_PRECALCULATED_CHECKSUM */
+};
+
+#if LWIP_HTTPD_CUSTOM_FILES
+/* Prototypes required to implement custom files as fs addon */
+int fs_open_custom(struct fs_file *file, const char *name);
+void fs_close_custom(struct fs_file *file);
+#if LWIP_HTTPD_FS_ASYNC_READ
+u8_t fs_canread_custom(struct fs_file *file);
+u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
+int fs_read_async_custom(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
+#else /* LWIP_HTTPD_FS_ASYNC_READ */
+int fs_read_custom(struct fs_file *file, char *buffer, int count);
+#endif /* LWIP_HTTPD_FS_ASYNC_READ */
+#endif /* LWIP_HTTPD_CUSTOM_FILES */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_FS_H */

src/lwip/include/lwip/apps/http_client.h

@@ -0,0 +1,160 @@
+/**
+ * @file
+ * HTTP client
+ */
+
+/*
+ * Copyright (c) 2018 Simon Goldschmidt <goldsimon@gmx.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_HTTP_CLIENT_H
+#define LWIP_HDR_APPS_HTTP_CLIENT_H
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+#include "lwip/altcp.h"
+#include "lwip/prot/iana.h"
+#include "lwip/pbuf.h"
+
+#if LWIP_TCP && LWIP_CALLBACK_API
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @ingroup httpc
+ * HTTPC_HAVE_FILE_IO: define this to 1 to have functions dowloading directly
+ * to disk via fopen/fwrite.
+ * These functions are example implementations of the interface only.
+ */
+#ifndef LWIP_HTTPC_HAVE_FILE_IO
+#define LWIP_HTTPC_HAVE_FILE_IO   0
+#endif
+
+/**
+ * @ingroup httpc
+ * The default TCP port used for HTTP
+ */
+#define HTTP_DEFAULT_PORT         LWIP_IANA_PORT_HTTP
+
+/**
+ * @ingroup httpc
+ * HTTP client result codes
+ */
+typedef enum ehttpc_result {
+  /** File successfully received */
+  HTTPC_RESULT_OK            = 0,
+  /** Unknown error */
+  HTTPC_RESULT_ERR_UNKNOWN   = 1,
+  /** Connection to server failed */
+  HTTPC_RESULT_ERR_CONNECT   = 2,
+  /** Failed to resolve server hostname */
+  HTTPC_RESULT_ERR_HOSTNAME  = 3,
+  /** Connection unexpectedly closed by remote server */
+  HTTPC_RESULT_ERR_CLOSED    = 4,
+  /** Connection timed out (server didn't respond in time) */
+  HTTPC_RESULT_ERR_TIMEOUT   = 5,
+  /** Server responded with an error code */
+  HTTPC_RESULT_ERR_SVR_RESP  = 6,
+  /** Local memory error */
+  HTTPC_RESULT_ERR_MEM       = 7,
+  /** Local abort */
+  HTTPC_RESULT_LOCAL_ABORT   = 8,
+  /** Content length mismatch */
+  HTTPC_RESULT_ERR_CONTENT_LEN = 9
+} httpc_result_t;
+
+typedef struct _httpc_state httpc_state_t;
+
+/**
+ * @ingroup httpc
+ * Prototype of a http client callback function
+ *
+ * @param arg argument specified when initiating the request
+ * @param httpc_result result of the http transfer (see enum httpc_result_t)
+ * @param rx_content_len number of bytes received (without headers)
+ * @param srv_res this contains the http status code received (if any)
+ * @param err an error returned by internal lwip functions, can help to specify
+ *            the source of the error but must not necessarily be != ERR_OK
+ */
+typedef void (*httpc_result_fn)(void *arg, httpc_result_t httpc_result, u32_t rx_content_len, u32_t srv_res, err_t err);
+
+/**
+ * @ingroup httpc
+ * Prototype of http client callback: called when the headers are received
+ *
+ * @param connection http client connection
+ * @param arg argument specified when initiating the request
+ * @param hdr header pbuf(s) (may contain data also)
+ * @param hdr_len length of the heders in 'hdr'
+ * @param content_len content length as received in the headers (-1 if not received)
+ * @return if != ERR_OK is returned, the connection is aborted
+ */
+typedef err_t (*httpc_headers_done_fn)(httpc_state_t *connection, void *arg, struct pbuf *hdr, u16_t hdr_len, u32_t content_len);
+
+typedef struct _httpc_connection {
+  ip_addr_t proxy_addr;
+  u16_t proxy_port;
+  u8_t use_proxy;
+  /* @todo: add username:pass? */
+
+#if LWIP_ALTCP
+  altcp_allocator_t *altcp_allocator;
+#endif
+
+  /* this callback is called when the transfer is finished (or aborted) */
+  httpc_result_fn result_fn;
+  /* this callback is called after receiving the http headers
+     It can abort the connection by returning != ERR_OK */
+  httpc_headers_done_fn headers_done_fn;
+} httpc_connection_t;
+
+err_t httpc_get_file(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings,
+                     altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection);
+err_t httpc_get_file_dns(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings,
+                     altcp_recv_fn recv_fn, void* callback_arg, httpc_state_t **connection);
+
+#if LWIP_HTTPC_HAVE_FILE_IO
+err_t httpc_get_file_to_disk(const ip_addr_t* server_addr, u16_t port, const char* uri, const httpc_connection_t *settings,
+                     void* callback_arg, const char* local_file_name, httpc_state_t **connection);
+err_t httpc_get_file_dns_to_disk(const char* server_name, u16_t port, const char* uri, const httpc_connection_t *settings,
+                     void* callback_arg, const char* local_file_name, httpc_state_t **connection);
+#endif /* LWIP_HTTPC_HAVE_FILE_IO */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_TCP && LWIP_CALLBACK_API */
+
+#endif /* LWIP_HDR_APPS_HTTP_CLIENT_H */

src/lwip/include/lwip/apps/httpd.h

@@ -0,0 +1,256 @@
+/**
+ * @file
+ * HTTP server
+ */
+
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ * This version of the file has been modified by Texas Instruments to offer
+ * simple server-side-include (SSI) and Common Gateway Interface (CGI)
+ * capability.
+ */
+
+#ifndef LWIP_HDR_APPS_HTTPD_H
+#define LWIP_HDR_APPS_HTTPD_H
+
+#include "httpd_opts.h"
+#include "lwip/err.h"
+#include "lwip/pbuf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_HTTPD_CGI
+
+/**
+ * @ingroup httpd
+ * Function pointer for a CGI script handler.
+ *
+ * This function is called each time the HTTPD server is asked for a file
+ * whose name was previously registered as a CGI function using a call to
+ * http_set_cgi_handlers. The iIndex parameter provides the index of the
+ * CGI within the cgis array passed to http_set_cgi_handlers. Parameters
+ * pcParam and pcValue provide access to the parameters provided along with
+ * the URI. iNumParams provides a count of the entries in the pcParam and
+ * pcValue arrays. Each entry in the pcParam array contains the name of a
+ * parameter with the corresponding entry in the pcValue array containing the
+ * value for that parameter. Note that pcParam may contain multiple elements
+ * with the same name if, for example, a multi-selection list control is used
+ * in the form generating the data.
+ *
+ * The function should return a pointer to a character string which is the
+ * path and filename of the response that is to be sent to the connected
+ * browser, for example "/thanks.htm" or "/response/error.ssi".
+ *
+ * The maximum number of parameters that will be passed to this function via
+ * iNumParams is defined by LWIP_HTTPD_MAX_CGI_PARAMETERS. Any parameters in
+ * the incoming HTTP request above this number will be discarded.
+ *
+ * Requests intended for use by this CGI mechanism must be sent using the GET
+ * method (which encodes all parameters within the URI rather than in a block
+ * later in the request). Attempts to use the POST method will result in the
+ * request being ignored.
+ *
+ */
+typedef const char *(*tCGIHandler)(int iIndex, int iNumParams, char *pcParam[],
+                             char *pcValue[]);
+
+/**
+ * @ingroup httpd
+ * Structure defining the base filename (URL) of a CGI and the associated
+ * function which is to be called when that URL is requested.
+ */
+typedef struct
+{
+    const char *pcCGIName;
+    tCGIHandler pfnCGIHandler;
+} tCGI;
+
+/** Set the array of cgi handlers. */
+void http_set_cgi_handlers(const tCGI *pCGIs, int iNumHandlers);
+
+#endif /* LWIP_HTTPD_CGI */
+
+#if LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI
+
+#if LWIP_HTTPD_CGI_SSI
+/* we have to prototype this struct here to make it available for the handler */
+struct fs_file;
+
+/** Define this generic CGI handler in your application.
+ * It is called once for every URI with parameters.
+ * The parameters can be stored to the object passed as connection_state, which
+ * is allocated to file->state via fs_state_init() from fs_open() or fs_open_custom().
+ * Content creation via SSI or complete dynamic files can retrieve the CGI params from there.
+ */
+extern void httpd_cgi_handler(struct fs_file *file, const char* uri, int iNumParams,
+                              char **pcParam, char **pcValue
+#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
+                                     , void *connection_state
+#endif /* LWIP_HTTPD_FILE_STATE */
+                                     );
+#endif /* LWIP_HTTPD_CGI_SSI */
+
+#endif /* LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI */
+
+#if LWIP_HTTPD_SSI
+
+/**
+ * @ingroup httpd
+ * Function pointer for the SSI tag handler callback.
+ *
+ * This function will be called each time the HTTPD server detects a tag of the
+ * form <!--#name--> in files with extensions mentioned in the g_pcSSIExtensions
+ * array (currently .shtml, .shtm, .ssi, .xml, .json) where "name" appears as
+ * one of the tags supplied to http_set_ssi_handler in the tags array.  The
+ * returned insert string, which will be appended after the the string
+ * "<!--#name-->" in file sent back to the client, should be written to pointer
+ * pcInsert. iInsertLen contains the size of the buffer pointed to by
+ * pcInsert. The iIndex parameter provides the zero-based index of the tag as
+ * found in the tags array and identifies the tag that is to be processed.
+ *
+ * The handler returns the number of characters written to pcInsert excluding
+ * any terminating NULL or HTTPD_SSI_TAG_UNKNOWN when tag is not recognized.
+ *
+ * Note that the behavior of this SSI mechanism is somewhat different from the
+ * "normal" SSI processing as found in, for example, the Apache web server.  In
+ * this case, the inserted text is appended following the SSI tag rather than
+ * replacing the tag entirely.  This allows for an implementation that does not
+ * require significant additional buffering of output data yet which will still
+ * offer usable SSI functionality. One downside to this approach is when
+ * attempting to use SSI within JavaScript.  The SSI tag is structured to
+ * resemble an HTML comment but this syntax does not constitute a comment
+ * within JavaScript and, hence, leaving the tag in place will result in
+ * problems in these cases. In order to avoid these problems, define
+ * LWIP_HTTPD_SSI_INCLUDE_TAG as zero in your lwip options file, or use JavaScript
+ * style block comments in the form / * # name * / (without the spaces).
+ */
+typedef u16_t (*tSSIHandler)(
+#if LWIP_HTTPD_SSI_RAW
+                             const char* ssi_tag_name,
+#else /* LWIP_HTTPD_SSI_RAW */
+                             int iIndex,
+#endif /* LWIP_HTTPD_SSI_RAW */
+                             char *pcInsert, int iInsertLen
+#if LWIP_HTTPD_SSI_MULTIPART
+                             , u16_t current_tag_part, u16_t *next_tag_part
+#endif /* LWIP_HTTPD_SSI_MULTIPART */
+#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
+                             , void *connection_state
+#endif /* LWIP_HTTPD_FILE_STATE */
+                             );
+
+/** Set the SSI handler function
+ * (if LWIP_HTTPD_SSI_RAW==1, only the first argument is used)
+ */
+void http_set_ssi_handler(tSSIHandler pfnSSIHandler,
+                          const char **ppcTags, int iNumTags);
+
+/** For LWIP_HTTPD_SSI_RAW==1, return this to indicate the tag is unknown.
+ * In this case, the webserver writes a warning into the page.
+ * You can also just return 0 to write nothing for unknown tags.
+ */
+#define HTTPD_SSI_TAG_UNKNOWN 0xFFFF
+
+#endif /* LWIP_HTTPD_SSI */
+
+#if LWIP_HTTPD_SUPPORT_POST
+
+/* These functions must be implemented by the application */
+
+/**
+ * @ingroup httpd
+ * Called when a POST request has been received. The application can decide
+ * whether to accept it or not.
+ *
+ * @param connection Unique connection identifier, valid until httpd_post_end
+ *        is called.
+ * @param uri The HTTP header URI receiving the POST request.
+ * @param http_request The raw HTTP request (the first packet, normally).
+ * @param http_request_len Size of 'http_request'.
+ * @param content_len Content-Length from HTTP header.
+ * @param response_uri Filename of response file, to be filled when denying the
+ *        request
+ * @param response_uri_len Size of the 'response_uri' buffer.
+ * @param post_auto_wnd Set this to 0 to let the callback code handle window
+ *        updates by calling 'httpd_post_data_recved' (to throttle rx speed)
+ *        default is 1 (httpd handles window updates automatically)
+ * @return ERR_OK: Accept the POST request, data may be passed in
+ *         another err_t: Deny the POST request, send back 'bad request'.
+ */
+err_t httpd_post_begin(void *connection, const char *uri, const char *http_request,
+                       u16_t http_request_len, int content_len, char *response_uri,
+                       u16_t response_uri_len, u8_t *post_auto_wnd);
+
+/**
+ * @ingroup httpd
+ * Called for each pbuf of data that has been received for a POST.
+ * ATTENTION: The application is responsible for freeing the pbufs passed in!
+ *
+ * @param connection Unique connection identifier.
+ * @param p Received data.
+ * @return ERR_OK: Data accepted.
+ *         another err_t: Data denied, http_post_get_response_uri will be called.
+ */
+err_t httpd_post_receive_data(void *connection, struct pbuf *p);
+
+/**
+ * @ingroup httpd
+ * Called when all data is received or when the connection is closed.
+ * The application must return the filename/URI of a file to send in response
+ * to this POST request. If the response_uri buffer is untouched, a 404
+ * response is returned.
+ *
+ * @param connection Unique connection identifier.
+ * @param response_uri Filename of response file, to be filled when denying the request
+ * @param response_uri_len Size of the 'response_uri' buffer.
+ */
+void httpd_post_finished(void *connection, char *response_uri, u16_t response_uri_len);
+
+#if LWIP_HTTPD_POST_MANUAL_WND
+void httpd_post_data_recved(void *connection, u16_t recved_len);
+#endif /* LWIP_HTTPD_POST_MANUAL_WND */
+
+#endif /* LWIP_HTTPD_SUPPORT_POST */
+
+void httpd_init(void);
+
+#if HTTPD_ENABLE_HTTPS
+struct altcp_tls_config;
+void httpd_inits(struct altcp_tls_config *conf);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_HTTPD_H */

src/lwip/include/lwip/apps/httpd_opts.h

@@ -0,0 +1,416 @@
+/**
+ * @file
+ * HTTP server options list
+ */
+
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ * This version of the file has been modified by Texas Instruments to offer
+ * simple server-side-include (SSI) and Common Gateway Interface (CGI)
+ * capability.
+ */
+
+#ifndef LWIP_HDR_APPS_HTTPD_OPTS_H
+#define LWIP_HDR_APPS_HTTPD_OPTS_H
+
+#include "lwip/opt.h"
+#include "lwip/prot/iana.h"
+
+/**
+ * @defgroup httpd_opts Options
+ * @ingroup httpd
+ * @{
+ */
+
+/** Set this to 1 to support CGI (old style).
+ *
+ * This old style CGI support works by registering an array of URLs and
+ * associated CGI handler functions (@ref http_set_cgi_handlers).
+ * This list is scanned just before fs_open is called from request handling.
+ * The handler can return a new URL that is used internally by the httpd to
+ * load the returned page (passed to fs_open).
+ *
+ * Use this CGI type e.g. to execute specific actions and return a page that
+ * does not depend on the CGI parameters.
+ */
+#if !defined LWIP_HTTPD_CGI || defined __DOXYGEN__
+#define LWIP_HTTPD_CGI            0
+#endif
+
+/** Set this to 1 to support CGI (new style).
+ *
+ * This new style CGI support works by calling a global function
+ * (@ref tCGIHandler) for all URLs that are found. fs_open is called first
+ * and the URL can not be written by the CGI handler. Instead, this handler gets
+ * passed the http file state, an object where it can store information derived
+ * from the CGI URL or parameters. This file state is later passed to SSI, so
+ * the SSI code can return data depending on CGI input.
+ *
+ * Use this CGI handler if you want CGI information passed on to SSI.
+ */
+#if !defined LWIP_HTTPD_CGI_SSI || defined __DOXYGEN__
+#define LWIP_HTTPD_CGI_SSI        0
+#endif
+
+/** Set this to 1 to support SSI (Server-Side-Includes)
+ *
+ * In contrast to other http servers, this only calls a preregistered callback
+ * function (@see http_set_ssi_handler) for each tag (in the format of
+ * <!--#tag-->) encountered in SSI-enabled pages.
+ * SSI-enabled pages must have one of the predefined SSI-enabled file extensions.
+ * All files with one of these extensions are parsed when sent.
+ *
+ * A downside of the current SSI implementation is that persistent connections
+ * don't work, as the file length is not known in advance (and httpd currently
+ * relies on the Content-Length header for persistent connections).
+ *
+ * To save memory, the maximum tag length is limited (@see LWIP_HTTPD_MAX_TAG_NAME_LEN).
+ * To save memory, the maximum insertion string length is limited (@see
+ * LWIP_HTTPD_MAX_TAG_INSERT_LEN). If this is not enough, @ref LWIP_HTTPD_SSI_MULTIPART
+ * can be used.
+ */
+#if !defined LWIP_HTTPD_SSI || defined __DOXYGEN__
+#define LWIP_HTTPD_SSI            0
+#endif
+
+/** Set this to 1 to implement an SSI tag handler callback that gets a const char*
+ * to the tag (instead of an index into a pre-registered array of known tags)
+ * If this is 0, the SSI handler callback function is only called pre-registered tags.
+ */
+#if !defined LWIP_HTTPD_SSI_RAW || defined __DOXYGEN__
+#define LWIP_HTTPD_SSI_RAW        0
+#endif
+
+/** Set this to 0 to prevent parsing the file extension at runtime to decide
+ * if a file should be scanned for SSI tags or not.
+ * Default is 1 (file extensions are checked using the g_pcSSIExtensions array)
+ * Set to 2 to override this runtime test function. In this case, you have to
+ * provide an external function that does the check:
+ *   u8_t http_uri_is_ssi(struct fs_file *file, const char *uri)
+ *
+ * This is enabled by default, but if you only use a newer version of makefsdata
+ * supporting the "-ssi" option, this info is already present in
+ */
+#if !defined LWIP_HTTPD_SSI_BY_FILE_EXTENSION || defined __DOXYGEN__
+#define LWIP_HTTPD_SSI_BY_FILE_EXTENSION  1
+#endif
+
+/** This is a list of file extensions handled as SSI files. This define
+ * is used to initialize a 'const char *const[]'. It is only used if
+ * LWIP_HTTPD_SSI_BY_FILE_EXTENSION != 0.
+ */
+#if !defined LWIP_HTTPD_SSI_EXTENSIONS || defined __DOXYGEN__
+#define LWIP_HTTPD_SSI_EXTENSIONS ".shtml", ".shtm", ".ssi", ".xml", ".json"
+#endif
+
+/** Set this to 1 to support HTTP POST */
+#if !defined LWIP_HTTPD_SUPPORT_POST || defined __DOXYGEN__
+#define LWIP_HTTPD_SUPPORT_POST   0
+#endif
+
+/* The maximum number of parameters that the CGI handler can be sent. */
+#if !defined LWIP_HTTPD_MAX_CGI_PARAMETERS || defined __DOXYGEN__
+#define LWIP_HTTPD_MAX_CGI_PARAMETERS 16
+#endif
+
+/** LWIP_HTTPD_SSI_MULTIPART==1: SSI handler function is called with 2 more
+ * arguments indicating a counter for insert string that are too long to be
+ * inserted at once: the SSI handler function must then set 'next_tag_part'
+ * which will be passed back to it in the next call. */
+#if !defined LWIP_HTTPD_SSI_MULTIPART || defined __DOXYGEN__
+#define LWIP_HTTPD_SSI_MULTIPART    0
+#endif
+
+/* The maximum length of the string comprising the SSI tag name
+ * ATTENTION: tags longer than this are ignored, not truncated!
+ */
+#if !defined LWIP_HTTPD_MAX_TAG_NAME_LEN || defined __DOXYGEN__
+#define LWIP_HTTPD_MAX_TAG_NAME_LEN 8
+#endif
+
+/* The maximum length of string that can be returned to replace any given tag
+ * If this buffer is not long enough, use LWIP_HTTPD_SSI_MULTIPART.
+ */
+#if !defined LWIP_HTTPD_MAX_TAG_INSERT_LEN || defined __DOXYGEN__
+#define LWIP_HTTPD_MAX_TAG_INSERT_LEN 192
+#endif
+
+#if !defined LWIP_HTTPD_POST_MANUAL_WND || defined __DOXYGEN__
+#define LWIP_HTTPD_POST_MANUAL_WND  0
+#endif
+
+/** This string is passed in the HTTP header as "Server: " */
+#if !defined HTTPD_SERVER_AGENT || defined __DOXYGEN__
+#define HTTPD_SERVER_AGENT "lwIP/" LWIP_VERSION_STRING " (http://savannah.nongnu.org/projects/lwip)"
+#endif
+
+/** Set this to 1 if you want to include code that creates HTTP headers
+ * at runtime. Default is off: HTTP headers are then created statically
+ * by the makefsdata tool. Static headers mean smaller code size, but
+ * the (readonly) fsdata will grow a bit as every file includes the HTTP
+ * header. */
+#if !defined LWIP_HTTPD_DYNAMIC_HEADERS || defined __DOXYGEN__
+#define LWIP_HTTPD_DYNAMIC_HEADERS 0
+#endif
+
+#if !defined HTTPD_DEBUG || defined __DOXYGEN__
+#define HTTPD_DEBUG         LWIP_DBG_OFF
+#endif
+
+/** Set this to 1 to use a memp pool for allocating
+ * struct http_state instead of the heap.
+ * If enabled, you'll need to define MEMP_NUM_PARALLEL_HTTPD_CONNS
+ * (and MEMP_NUM_PARALLEL_HTTPD_SSI_CONNS for SSI) to set the size of
+ * the pool(s).
+ */
+#if !defined HTTPD_USE_MEM_POOL || defined __DOXYGEN__
+#define HTTPD_USE_MEM_POOL  0
+#endif
+
+/** The server port for HTTPD to use */
+#if !defined HTTPD_SERVER_PORT || defined __DOXYGEN__
+#define HTTPD_SERVER_PORT                   LWIP_IANA_PORT_HTTP
+#endif
+
+/** The https server port for HTTPD to use */
+#if !defined HTTPD_SERVER_PORT_HTTPS || defined __DOXYGEN__
+#define HTTPD_SERVER_PORT_HTTPS             LWIP_IANA_PORT_HTTPS
+#endif
+
+/** Enable https support? */
+#if !defined HTTPD_ENABLE_HTTPS || defined __DOXYGEN__
+#define HTTPD_ENABLE_HTTPS                  0
+#endif
+
+/** Maximum retries before the connection is aborted/closed.
+ * - number of times pcb->poll is called -> default is 4*500ms = 2s;
+ * - reset when pcb->sent is called
+ */
+#if !defined HTTPD_MAX_RETRIES || defined __DOXYGEN__
+#define HTTPD_MAX_RETRIES                   4
+#endif
+
+/** The poll delay is X*500ms */
+#if !defined HTTPD_POLL_INTERVAL || defined __DOXYGEN__
+#define HTTPD_POLL_INTERVAL                 4
+#endif
+
+/** Priority for tcp pcbs created by HTTPD (very low by default).
+ *  Lower priorities get killed first when running out of memory.
+ */
+#if !defined HTTPD_TCP_PRIO || defined __DOXYGEN__
+#define HTTPD_TCP_PRIO                      TCP_PRIO_MIN
+#endif
+
+/** Set this to 1 to enable timing each file sent */
+#if !defined LWIP_HTTPD_TIMING || defined __DOXYGEN__
+#define LWIP_HTTPD_TIMING                   0
+#endif
+/** Set this to 1 to enable timing each file sent */
+#if !defined HTTPD_DEBUG_TIMING || defined __DOXYGEN__
+#define HTTPD_DEBUG_TIMING                  LWIP_DBG_OFF
+#endif
+
+/** Set this to one to show error pages when parsing a request fails instead
+    of simply closing the connection. */
+#if !defined LWIP_HTTPD_SUPPORT_EXTSTATUS || defined __DOXYGEN__
+#define LWIP_HTTPD_SUPPORT_EXTSTATUS        0
+#endif
+
+/** Set this to 0 to drop support for HTTP/0.9 clients (to save some bytes) */
+#if !defined LWIP_HTTPD_SUPPORT_V09 || defined __DOXYGEN__
+#define LWIP_HTTPD_SUPPORT_V09              1
+#endif
+
+/** Set this to 1 to enable HTTP/1.1 persistent connections.
+ * ATTENTION: If the generated file system includes HTTP headers, these must
+ * include the "Connection: keep-alive" header (pass argument "-11" to makefsdata).
+ */
+#if !defined LWIP_HTTPD_SUPPORT_11_KEEPALIVE || defined __DOXYGEN__
+#define LWIP_HTTPD_SUPPORT_11_KEEPALIVE     0
+#endif
+
+/** Set this to 1 to support HTTP request coming in in multiple packets/pbufs */
+#if !defined LWIP_HTTPD_SUPPORT_REQUESTLIST || defined __DOXYGEN__
+#define LWIP_HTTPD_SUPPORT_REQUESTLIST      1
+#endif
+
+#if LWIP_HTTPD_SUPPORT_REQUESTLIST
+/** Number of rx pbufs to enqueue to parse an incoming request (up to the first
+    newline) */
+#if !defined LWIP_HTTPD_REQ_QUEUELEN || defined __DOXYGEN__
+#define LWIP_HTTPD_REQ_QUEUELEN             5
+#endif
+
+/** Number of (TCP payload-) bytes (in pbufs) to enqueue to parse and incoming
+    request (up to the first double-newline) */
+#if !defined LWIP_HTTPD_REQ_BUFSIZE || defined __DOXYGEN__
+#define LWIP_HTTPD_REQ_BUFSIZE              LWIP_HTTPD_MAX_REQ_LENGTH
+#endif
+
+/** Defines the maximum length of a HTTP request line (up to the first CRLF,
+    copied from pbuf into this a global buffer when pbuf- or packet-queues
+    are received - otherwise the input pbuf is used directly) */
+#if !defined LWIP_HTTPD_MAX_REQ_LENGTH || defined __DOXYGEN__
+#define LWIP_HTTPD_MAX_REQ_LENGTH           LWIP_MIN(1023, (LWIP_HTTPD_REQ_QUEUELEN * PBUF_POOL_BUFSIZE))
+#endif
+#endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
+
+/** This is the size of a static buffer used when URIs end with '/'.
+ * In this buffer, the directory requested is concatenated with all the
+ * configured default file names.
+ * Set to 0 to disable checking default filenames on non-root directories.
+ */
+#if !defined LWIP_HTTPD_MAX_REQUEST_URI_LEN || defined __DOXYGEN__
+#define LWIP_HTTPD_MAX_REQUEST_URI_LEN      63
+#endif
+
+/** Maximum length of the filename to send as response to a POST request,
+ * filled in by the application when a POST is finished.
+ */
+#if !defined LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN || defined __DOXYGEN__
+#define LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN 63
+#endif
+
+/** Set this to 0 to not send the SSI tag (default is on, so the tag will
+ * be sent in the HTML page */
+#if !defined LWIP_HTTPD_SSI_INCLUDE_TAG || defined __DOXYGEN__
+#define LWIP_HTTPD_SSI_INCLUDE_TAG           1
+#endif
+
+/** Set this to 1 to call tcp_abort when tcp_close fails with memory error.
+ * This can be used to prevent consuming all memory in situations where the
+ * HTTP server has low priority compared to other communication. */
+#if !defined LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR || defined __DOXYGEN__
+#define LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR  0
+#endif
+
+/** Set this to 1 to kill the oldest connection when running out of
+ * memory for 'struct http_state' or 'struct http_ssi_state'.
+ * ATTENTION: This puts all connections on a linked list, so may be kind of slow.
+ */
+#if !defined LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED || defined __DOXYGEN__
+#define LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED 0
+#endif
+
+/** Set this to 1 to send URIs without extension without headers
+ * (who uses this at all??) */
+#if !defined LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI || defined __DOXYGEN__
+#define LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI 0
+#endif
+
+/** Default: Tags are sent from struct http_state and are therefore volatile */
+#if !defined HTTP_IS_TAG_VOLATILE || defined __DOXYGEN__
+#define HTTP_IS_TAG_VOLATILE(ptr) TCP_WRITE_FLAG_COPY
+#endif
+
+/* By default, the httpd is limited to send 2*pcb->mss to keep resource usage low
+   when http is not an important protocol in the device. */
+#if !defined HTTPD_LIMIT_SENDING_TO_2MSS || defined __DOXYGEN__
+#define HTTPD_LIMIT_SENDING_TO_2MSS 1
+#endif
+
+/* Define this to a function that returns the maximum amount of data to enqueue.
+   The function have this signature: u16_t fn(struct altcp_pcb* pcb);
+   The best place to define this is the hooks file (@see LWIP_HOOK_FILENAME) */
+#if !defined HTTPD_MAX_WRITE_LEN || defined __DOXYGEN__
+#if HTTPD_LIMIT_SENDING_TO_2MSS
+#define HTTPD_MAX_WRITE_LEN(pcb)    ((u16_t)(2 * altcp_mss(pcb)))
+#endif
+#endif
+
+/*------------------- FS OPTIONS -------------------*/
+
+/** Set this to 1 and provide the functions:
+ * - "int fs_open_custom(struct fs_file *file, const char *name)"
+ *    Called first for every opened file to allow opening files
+ *    that are not included in fsdata(_custom).c
+ * - "void fs_close_custom(struct fs_file *file)"
+ *    Called to free resources allocated by fs_open_custom().
+ */
+#if !defined LWIP_HTTPD_CUSTOM_FILES || defined __DOXYGEN__
+#define LWIP_HTTPD_CUSTOM_FILES       0
+#endif
+
+/** Set this to 1 to support fs_read() to dynamically read file data.
+ * Without this (default=off), only one-block files are supported,
+ * and the contents must be ready after fs_open().
+ */
+#if !defined LWIP_HTTPD_DYNAMIC_FILE_READ || defined __DOXYGEN__
+#define LWIP_HTTPD_DYNAMIC_FILE_READ  0
+#endif
+
+/** Set this to 1 to include an application state argument per file
+ * that is opened. This allows to keep a state per connection/file.
+ */
+#if !defined LWIP_HTTPD_FILE_STATE || defined __DOXYGEN__
+#define LWIP_HTTPD_FILE_STATE         0
+#endif
+
+/** Set this to 1 to add the pextension field to the fs_file structure.
+ * This is included here to retain compatibility with legacy code that
+ * relies on the presence of the pextension field.
+ * New code should use LWIP_HTTPD_FILE_STATE instead.
+ * This option may be removed in a future version of lwip.
+ */
+#if !defined LWIP_HTTPD_FILE_EXTENSION || defined __DOXYGEN__
+#define LWIP_HTTPD_FILE_EXTENSION     0
+#endif
+
+/** HTTPD_PRECALCULATED_CHECKSUM==1: include precompiled checksums for
+ * predefined (MSS-sized) chunks of the files to prevent having to calculate
+ * the checksums at runtime. */
+#if !defined HTTPD_PRECALCULATED_CHECKSUM || defined __DOXYGEN__
+#define HTTPD_PRECALCULATED_CHECKSUM  0
+#endif
+
+/** LWIP_HTTPD_FS_ASYNC_READ==1: support asynchronous read operations
+ * (fs_read_async returns FS_READ_DELAYED and calls a callback when finished).
+ */
+#if !defined LWIP_HTTPD_FS_ASYNC_READ || defined __DOXYGEN__
+#define LWIP_HTTPD_FS_ASYNC_READ      0
+#endif
+
+/** Filename (including path) to use as FS data file */
+#if !defined HTTPD_FSDATA_FILE || defined __DOXYGEN__
+/* HTTPD_USE_CUSTOM_FSDATA: Compatibility with deprecated lwIP option */
+#if defined(HTTPD_USE_CUSTOM_FSDATA) && (HTTPD_USE_CUSTOM_FSDATA != 0)
+#define HTTPD_FSDATA_FILE "fsdata_custom.c"
+#else
+#define HTTPD_FSDATA_FILE "fsdata.c"
+#endif
+#endif
+
+/**
+ * @}
+ */
+
+#endif /* LWIP_HDR_APPS_HTTPD_OPTS_H */

src/lwip/include/lwip/apps/lwiperf.h

@@ -0,0 +1,109 @@
+/**
+ * @file
+ * lwIP iPerf server implementation
+ */
+
+/*
+ * Copyright (c) 2014 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt
+ *
+ */
+#ifndef LWIP_HDR_APPS_LWIPERF_H
+#define LWIP_HDR_APPS_LWIPERF_H
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LWIPERF_TCP_PORT_DEFAULT  5001
+
+/** lwIPerf test results */
+enum lwiperf_report_type
+{
+  /** The server side test is done */
+  LWIPERF_TCP_DONE_SERVER,
+  /** The client side test is done */
+  LWIPERF_TCP_DONE_CLIENT,
+  /** Local error lead to test abort */
+  LWIPERF_TCP_ABORTED_LOCAL,
+  /** Data check error lead to test abort */
+  LWIPERF_TCP_ABORTED_LOCAL_DATAERROR,
+  /** Transmit error lead to test abort */
+  LWIPERF_TCP_ABORTED_LOCAL_TXERROR,
+  /** Remote side aborted the test */
+  LWIPERF_TCP_ABORTED_REMOTE
+};
+
+/** Control */
+enum lwiperf_client_type
+{
+  /** Unidirectional tx only test */
+  LWIPERF_CLIENT,
+  /** Do a bidirectional test simultaneously */
+  LWIPERF_DUAL,
+  /** Do a bidirectional test individually */
+  LWIPERF_TRADEOFF
+};
+
+/** Prototype of a report function that is called when a session is finished.
+    This report function can show the test results.
+    @param arg Report_arg from when the test was started.
+    @param report_type contains the test result
+    @param local_addr The local address from the session
+    @param local_port The local port
+    @param remote_addr The remote address from the session
+    @param remote_port The remote port
+    @param bytes_transferred Total transferred bytes
+    @param ms_duration Total session duration, in milliseconds
+    @param bandwidth_kbitpsec Average bandwidth during the session, in kbps
+*/
+typedef void (*lwiperf_report_fn)(void *arg, enum lwiperf_report_type report_type,
+  const ip_addr_t* local_addr, u16_t local_port, const ip_addr_t* remote_addr, u16_t remote_port,
+  u32_t bytes_transferred, u32_t ms_duration, u32_t bandwidth_kbitpsec);
+
+void* lwiperf_start_tcp_server(const ip_addr_t* local_addr, u16_t local_port,
+                               lwiperf_report_fn report_fn, void* report_arg);
+void* lwiperf_start_tcp_server_default(lwiperf_report_fn report_fn, void* report_arg);
+void* lwiperf_start_tcp_client(const ip_addr_t* remote_addr, u16_t remote_port,
+                               enum lwiperf_client_type type,
+                               lwiperf_report_fn report_fn, void* report_arg);
+void* lwiperf_start_tcp_client_default(const ip_addr_t* remote_addr,
+                               lwiperf_report_fn report_fn, void* report_arg);
+
+void  lwiperf_abort(void* lwiperf_session);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_LWIPERF_H */

src/lwip/include/lwip/apps/mdns.h

@@ -0,0 +1,154 @@
+/**
+ * @file
+ * MDNS responder
+ */
+
+ /*
+ * Copyright (c) 2015 Verisure Innovation AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Ekman <erik@kryo.se>
+ * Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_MDNS_H
+#define LWIP_HDR_APPS_MDNS_H
+
+#include "lwip/apps/mdns_opts.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_MDNS_RESPONDER
+
+enum mdns_sd_proto {
+  DNSSD_PROTO_UDP = 0,
+  DNSSD_PROTO_TCP = 1
+};
+
+#define MDNS_PROBING_CONFLICT   0
+#define MDNS_PROBING_SUCCESSFUL 1
+
+#define MDNS_LABEL_MAXLEN  63
+#define MDNS_DOMAIN_MAXLEN 256
+
+struct mdns_host;
+struct mdns_service;
+
+/* Domain structs */
+struct mdns_domain {
+  /* Encoded domain name */
+  u8_t name[MDNS_DOMAIN_MAXLEN];
+  /* Total length of domain name, including zero */
+  u16_t length;
+  /* Set if compression of this domain is not allowed */
+  u8_t skip_compression;
+};
+
+/** Domain, type and class.
+ *  Shared between questions and answers */
+struct mdns_rr_info {
+  struct mdns_domain domain;
+  u16_t type;
+  u16_t klass;
+};
+
+struct mdns_answer {
+  struct mdns_rr_info info;
+  /** cache flush command bit */
+  u16_t cache_flush;
+  /* Validity time in seconds */
+  u32_t ttl;
+  /** Length of variable answer */
+  u16_t rd_length;
+  /** Offset of start of variable answer in packet */
+  u16_t rd_offset;
+};
+
+/** Callback function to add text to a reply, called when generating the reply */
+typedef void (*service_get_txt_fn_t)(struct mdns_service *service, void *txt_userdata);
+
+/** Callback function to let application know the result of probing network for name
+ * uniqueness, called with result MDNS_PROBING_SUCCESSFUL if no other node claimed
+ * use for the name for the netif or a service and is safe to use, or MDNS_PROBING_CONFLICT
+ * if another node is already using it and mdns is disabled on this interface */
+typedef void (*mdns_name_result_cb_t)(struct netif* netif, u8_t result, s8_t slot);
+
+void *mdns_get_service_txt_userdata(struct netif *netif, s8_t slot);
+
+void mdns_resp_init(void);
+
+void mdns_resp_register_name_result_cb(mdns_name_result_cb_t cb);
+
+err_t mdns_resp_add_netif(struct netif *netif, const char *hostname);
+err_t mdns_resp_remove_netif(struct netif *netif);
+err_t mdns_resp_rename_netif(struct netif *netif, const char *hostname);
+int mdns_resp_netif_active(struct netif *netif);
+
+s8_t  mdns_resp_add_service(struct netif *netif, const char *name, const char *service, enum mdns_sd_proto proto, u16_t port, service_get_txt_fn_t txt_fn, void *txt_userdata);
+err_t mdns_resp_del_service(struct netif *netif, u8_t slot);
+err_t mdns_resp_rename_service(struct netif *netif, u8_t slot, const char *name);
+
+err_t mdns_resp_add_service_txtitem(struct mdns_service *service, const char *txt, u8_t txt_len);
+
+void mdns_resp_restart_delay(struct netif *netif, uint32_t delay);
+void mdns_resp_restart(struct netif *netif);
+void mdns_resp_announce(struct netif *netif);
+
+/**
+ * @ingroup mdns
+ * Announce IP settings have changed on netif.
+ * Call this in your callback registered by netif_set_status_callback().
+ * No need to call this function when LWIP_NETIF_EXT_STATUS_CALLBACK==1,
+ * this handled automatically for you.
+ * @param netif The network interface where settings have changed.
+ */
+#define mdns_resp_netif_settings_changed(netif) mdns_resp_announce(netif)
+
+#if LWIP_MDNS_SEARCH
+typedef void (*search_result_fn_t)(struct mdns_answer *answer, const char *varpart, int varlen, int flags, void *arg);
+/* flags bits, both can be set! */
+#define MDNS_SEARCH_RESULT_FIRST    1 /* First answer in received frame. */
+#define MDNS_SEARCH_RESULT_LAST     2 /* Last answer. */
+
+err_t mdns_search_service(const char *name, const char *service, enum mdns_sd_proto proto,
+                          struct netif *netif, search_result_fn_t result_fn, void *arg,
+                          u8_t *request_id);
+void mdns_search_stop(u8_t request_id);
+
+#endif /* LWIP_MDNS_SEARCH */
+
+#endif /* LWIP_MDNS_RESPONDER */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_MDNS_H */

src/lwip/include/lwip/apps/mdns_domain.h

@@ -0,0 +1,80 @@
+/**
+ * @file
+ * MDNS responder - domain related functionalities 
+ */
+
+ /*
+ * Copyright (c) 2015 Verisure Innovation AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Ekman <erik@kryo.se>
+ * Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_MDNS_DOMAIN_H
+#define LWIP_HDR_APPS_MDNS_DOMAIN_H
+
+#include "lwip/apps/mdns_opts.h"
+#include "lwip/apps/mdns_priv.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_MDNS_RESPONDER
+
+/* Domain methods - also visible for unit tests */
+
+err_t mdns_domain_add_label(struct mdns_domain *domain, const char *label, u8_t len);
+err_t mdns_domain_add_domain(struct mdns_domain *domain, struct mdns_domain *source);
+err_t mdns_domain_add_string(struct mdns_domain *domain, const char *source);
+u16_t mdns_readname(struct pbuf *p, u16_t offset, struct mdns_domain *domain);
+void mdns_domain_debug_print(struct mdns_domain *domain);
+int mdns_domain_eq(struct mdns_domain *a, struct mdns_domain *b);
+#if LWIP_IPV4
+err_t mdns_build_reverse_v4_domain(struct mdns_domain *domain, const ip4_addr_t *addr);
+#endif
+#if LWIP_IPV6
+err_t mdns_build_reverse_v6_domain(struct mdns_domain *domain, const ip6_addr_t *addr);
+#endif
+err_t mdns_build_host_domain(struct mdns_domain *domain, struct mdns_host *mdns);
+err_t mdns_build_dnssd_domain(struct mdns_domain *domain);
+err_t mdns_build_service_domain(struct mdns_domain *domain, struct mdns_service *service, int include_name);
+#if LWIP_MDNS_SEARCH
+err_t mdns_build_request_domain(struct mdns_domain *domain, struct mdns_request *request, int include_name);
+#endif
+u16_t mdns_compress_domain(struct pbuf *pbuf, u16_t *offset, struct mdns_domain *domain);
+err_t mdns_write_domain(struct mdns_outpacket *outpkt, struct mdns_domain *domain);
+
+#endif /* LWIP_MDNS_RESPONDER */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_MDNS_DOMAIN_H */

src/lwip/include/lwip/apps/mdns_opts.h

@@ -0,0 +1,121 @@
+/**
+ * @file
+ * MDNS responder
+ */
+
+ /*
+ * Copyright (c) 2015 Verisure Innovation AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Ekman <erik@kryo.se>
+ * Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_MDNS_OPTS_H
+#define LWIP_HDR_APPS_MDNS_OPTS_H
+
+#include "lwip/opt.h"
+
+/**
+ * @defgroup mdns_opts Options
+ * @ingroup mdns
+ * @{
+ */
+
+/**
+ * LWIP_MDNS_RESPONDER==1: Turn on multicast DNS module. UDP must be available for MDNS
+ * transport. IGMP is needed for IPv4 multicast.
+ */
+#ifndef LWIP_MDNS_RESPONDER
+#define LWIP_MDNS_RESPONDER             0
+#endif /* LWIP_MDNS_RESPONDER */
+
+/** The maximum number of services per netif */
+#ifndef MDNS_MAX_SERVICES
+#define MDNS_MAX_SERVICES               1
+#endif
+
+/** The minimum delay between probes in ms. RFC 6762 require 250ms.
+ * In noisy WiFi environment, adding 30-50ms to this value help a lot for
+ * a successful Apple BCT tests.
+ */
+#ifndef MDNS_PROBE_DELAY_MS
+#define MDNS_PROBE_DELAY_MS           250
+#endif
+
+/** The maximum number of received packets stored in chained list of known
+ * answers for pending truncated questions. This value define the size of
+ * the MDNS_PKTS mempool.
+ * Up to MDNS_MAX_STORED_PKTS pbuf can be stored in addition to TC questions
+ * that are pending.
+ */
+#ifndef MDNS_MAX_STORED_PKTS
+#define MDNS_MAX_STORED_PKTS            4
+#endif
+
+/** Payload size allocated for each outgoing UDP packet. Will be allocated with
+ * PBUF_RAM and freed after packet was sent.
+ * According to RFC 6762, there is no reason to retain the 512 bytes restriction
+ * for link-local multicast packet.
+ * 512 bytes isn't enough when 2 services need to be probed.
+ */
+#ifndef MDNS_OUTPUT_PACKET_SIZE
+#define MDNS_OUTPUT_PACKET_SIZE      ((MDNS_MAX_SERVICES == 1) ? 512 : 1450)
+#endif
+
+/** MDNS_RESP_USENETIF_EXTCALLBACK==1: register an ext_callback on the netif
+ * to automatically restart probing/announcing on status or address change.
+ */
+#ifndef MDNS_RESP_USENETIF_EXTCALLBACK
+#define MDNS_RESP_USENETIF_EXTCALLBACK  LWIP_NETIF_EXT_STATUS_CALLBACK
+#endif
+
+/**
+ * LWIP_MDNS_SEARCH==1: Turn on search over multicast DNS module.
+ */
+#ifndef LWIP_MDNS_SEARCH
+#define LWIP_MDNS_SEARCH                1
+#endif
+
+/** The maximum number of running requests */
+#ifndef MDNS_MAX_REQUESTS
+#define MDNS_MAX_REQUESTS               2
+#endif
+
+/**
+ * MDNS_DEBUG: Enable debugging for multicast DNS.
+ */
+#ifndef MDNS_DEBUG
+#define MDNS_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/**
+ * @}
+ */
+
+#endif /* LWIP_HDR_APPS_MDNS_OPTS_H */

src/lwip/include/lwip/apps/mdns_out.h

@@ -0,0 +1,138 @@
+/**
+ * @file
+ * MDNS responder - output related functionalities
+ */
+
+ /*
+ * Copyright (c) 2015 Verisure Innovation AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Ekman <erik@kryo.se>
+ * Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_MDNS_OUT_H
+#define LWIP_HDR_APPS_MDNS_OUT_H
+
+#include "lwip/apps/mdns_opts.h"
+#include "lwip/apps/mdns_priv.h"
+#include "lwip/netif.h"
+#include "lwip/timeouts.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_MDNS_RESPONDER
+
+/** Bitmasks outmsg generation */
+/* Probe for ALL types with hostname */
+#define QUESTION_PROBE_HOST_ANY          0x10
+/* Probe for ALL types with service instance name */
+#define QUESTION_PROBE_SERVICE_NAME_ANY  0x10
+
+/* Lookup from hostname -> IPv4 */
+#define REPLY_HOST_A            0x01
+/* Lookup from IPv4/v6 -> hostname */
+#define REPLY_HOST_PTR_V4       0x02
+/* Lookup from hostname -> IPv6 */
+#define REPLY_HOST_AAAA         0x04
+/* Lookup from hostname -> IPv6 */
+#define REPLY_HOST_PTR_V6       0x08
+
+/* Lookup for service types */
+#define REPLY_SERVICE_TYPE_PTR  0x10
+/* Lookup for instances of service */
+#define REPLY_SERVICE_NAME_PTR  0x20
+/* Lookup for location of service instance */
+#define REPLY_SERVICE_SRV       0x40
+/* Lookup for text info on service instance */
+#define REPLY_SERVICE_TXT       0x80
+
+/* RFC6762 section 6:
+ * To protect the network against excessive packet flooding due to software bugs
+ * or malicious attack, a Multicast DNS responder MUST NOT (except in the one
+ * special case of answering probe queries) multicast a record on a given
+ * interface until at least one second has elapsed since the last time that
+ * record was multicast on that particular interface.
+ */
+#define MDNS_MULTICAST_TIMEOUT    1000
+
+/* RFC6762 section 6:
+ * In this special case only, when responding via multicast to a probe, a
+ * Multicast DNS responder is only required to delay its transmission as
+ * necessary to ensure an interval of at least 250 ms since the last time the
+ * record was multicast on that interface.
+ */
+#define MDNS_MULTICAST_PROBE_TIMEOUT    250
+
+/* RFC6762 section 5.4:
+ * When receiving a question with the unicast-response bit set, a responder
+ * SHOULD usually respond with a unicast packet directed back to the querier.
+ * However, if the responder has not multicast that record recently (within one
+ * quarter of its TTL), then the responder SHOULD instead multicast the response
+ * so as to keep all the peer caches up to date, and to permit passive conflict
+ * detection.
+ * -> we implement a stripped down version. Depending on a timeout of 30s
+ *    (25% of 120s) all QU questions are send via multicast or unicast.
+ */
+#define MDNS_MULTICAST_TIMEOUT_25TTL  30000
+
+err_t mdns_create_outpacket(struct netif *netif, struct mdns_outmsg *msg,
+                            struct mdns_outpacket *outpkt);
+err_t mdns_send_outpacket(struct mdns_outmsg *msg, struct netif *netif);
+void mdns_set_timeout(struct netif *netif, u32_t msecs,
+                        sys_timeout_handler handler, u8_t *busy_flag);
+#if LWIP_IPV4
+void mdns_multicast_timeout_reset_ipv4(void *arg);
+void mdns_multicast_probe_timeout_reset_ipv4(void *arg);
+void mdns_multicast_timeout_25ttl_reset_ipv4(void *arg);
+void mdns_send_multicast_msg_delayed_ipv4(void *arg);
+void mdns_send_unicast_msg_delayed_ipv4(void *arg);
+void mdns_start_multicast_timeouts_ipv4(struct netif *netif);
+#endif
+#if LWIP_IPV6
+void mdns_multicast_timeout_reset_ipv6(void *arg);
+void mdns_multicast_probe_timeout_reset_ipv6(void *arg);
+void mdns_multicast_timeout_25ttl_reset_ipv6(void *arg);
+void mdns_send_multicast_msg_delayed_ipv6(void *arg);
+void mdns_send_unicast_msg_delayed_ipv6(void *arg);
+void mdns_start_multicast_timeouts_ipv6(struct netif *netif);
+#endif
+void mdns_prepare_txtdata(struct mdns_service *service);
+#ifdef LWIP_MDNS_SEARCH
+err_t mdns_send_request(struct mdns_request *req, struct netif *netif, const ip_addr_t *destination);
+#endif
+
+#endif /* LWIP_MDNS_RESPONDER */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_MDNS_OUT_H */

src/lwip/include/lwip/apps/mdns_priv.h

@@ -0,0 +1,237 @@
+/**
+ * @file
+ * MDNS responder private definitions
+ */
+
+ /*
+ * Copyright (c) 2015 Verisure Innovation AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Ekman <erik@kryo.se>
+ * Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
+ *
+ */
+#ifndef LWIP_HDR_MDNS_PRIV_H
+#define LWIP_HDR_MDNS_PRIV_H
+
+#include "lwip/apps/mdns.h"
+#include "lwip/apps/mdns_opts.h"
+#include "lwip/pbuf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_MDNS_RESPONDER
+
+#define MDNS_READNAME_ERROR 0xFFFF
+#define NUM_DOMAIN_OFFSETS 10
+
+#define SRV_PRIORITY 0
+#define SRV_WEIGHT   0
+
+/* mDNS TTL: (RFC6762 section 10)
+ *  - 120 seconds if the hostname appears somewhere in the RR
+ *  - 75 minutes if not (4500 seconds)
+ *  - 10 seconds if responding to a legacy query
+ */
+#define MDNS_TTL_10    10
+#define MDNS_TTL_120   120
+#define MDNS_TTL_4500  4500
+
+/* RFC6762 section 8.1: If fifteen conflicts occur within any ten-second period,
+ * then the host MUST wait at least five seconds before each successive
+ * additional probe attempt.
+ */
+#define MDNS_PROBE_MAX_CONFLICTS_BEFORE_RATE_LIMIT  15
+#define MDNS_PROBE_MAX_CONFLICTS_TIME_WINDOW        10000
+#define MDNS_PROBE_MAX_CONFLICTS_TIMEOUT            5000
+
+#if LWIP_MDNS_SEARCH
+/** Description of a search request */
+struct mdns_request {
+  /** Name of service, like 'myweb' */
+  char name[MDNS_LABEL_MAXLEN + 1];
+  /** Type of service, like '_http' or '_services._dns-sd' */
+  struct mdns_domain service;
+  /** Callback function called for each response */
+  search_result_fn_t result_fn;
+  void *arg;
+  /** Protocol, TCP or UDP */
+  u16_t proto;
+  /** Query type (PTR, SRV, ...) */
+  u8_t qtype;
+  /** PTR only request. */
+  u16_t only_ptr;
+};
+#endif
+
+/** Description of a service */
+struct mdns_service {
+  /** TXT record to answer with */
+  struct mdns_domain txtdata;
+  /** Name of service, like 'myweb' */
+  char name[MDNS_LABEL_MAXLEN + 1];
+  /** Type of service, like '_http' */
+  char service[MDNS_LABEL_MAXLEN + 1];
+  /** Callback function and userdata
+   * to update txtdata buffer */
+  service_get_txt_fn_t txt_fn;
+  void *txt_userdata;
+  /** Protocol, TCP or UDP */
+  u16_t proto;
+  /** Port of the service */
+  u16_t port;
+};
+
+/** mDNS output packet */
+struct mdns_outpacket {
+  /** Packet data */
+  struct pbuf *pbuf;
+  /** Current write offset in packet */
+  u16_t write_offset;
+  /** Number of questions written */
+  u16_t questions;
+  /** Number of normal answers written */
+  u16_t answers;
+  /** Number of authoritative answers written */
+  u16_t authoritative;
+  /** Number of additional answers written */
+  u16_t additional;
+  /** Offsets for written domain names in packet.
+   *  Used for compression */
+  u16_t domain_offsets[NUM_DOMAIN_OFFSETS];
+};
+
+/** mDNS output message */
+struct mdns_outmsg {
+  /** Identifier. Used in legacy queries */
+  u16_t tx_id;
+  /** dns flags */
+  u8_t flags;
+  /** Destination IP/port if sent unicast */
+  ip_addr_t dest_addr;
+  u16_t dest_port;
+  /** If all answers in packet should set cache_flush bit */
+  u8_t cache_flush;
+  /** If reply should be sent unicast (as requested) */
+  u8_t unicast_reply_requested;
+  /** If legacy query. (tx_id needed, and write
+   *  question again in reply before answer) */
+  u8_t legacy_query;
+  /** If the query is a probe msg we need to respond immediately. Independent of
+   *  the QU or QM flag. */
+  u8_t probe_query_recv;
+  /* Question bitmask for host information */
+  u8_t host_questions;
+  /* Questions bitmask per service */
+  u8_t serv_questions[MDNS_MAX_SERVICES];
+  /* Reply bitmask for host information */
+  u8_t host_replies;
+  /* Bitmask for which reverse IPv6 hosts to answer */
+  u8_t host_reverse_v6_replies;
+  /* Reply bitmask per service */
+  u8_t serv_replies[MDNS_MAX_SERVICES];
+#ifdef LWIP_MDNS_SEARCH
+  /** Search query to send */
+  struct mdns_request *query;
+#endif
+};
+
+/** Delayed msg info */
+struct mdns_delayed_msg {
+  /** Signals if a multicast msg needs to be send out */
+  u8_t multicast_msg_waiting;
+  /** Multicast timeout for all multicast traffic except probe answers */
+  u8_t multicast_timeout;
+  /** Multicast timeout only for probe answers */
+  u8_t multicast_probe_timeout;
+  /** Output msg used for delayed multicast responses */
+  struct mdns_outmsg delayed_msg_multicast;
+  /** Prefer multicast over unicast timeout -> 25% of TTL = we take 30s as
+      general delay. */
+  u8_t multicast_timeout_25TTL;
+  /** Only send out new unicast message if previous was send */
+  u8_t unicast_msg_in_use;
+  /** Output msg used for delayed unicast responses */
+  struct mdns_outmsg delayed_msg_unicast;
+};
+
+/* MDNS states */
+typedef enum {
+  /* MDNS module is off */
+  MDNS_STATE_OFF,
+  /* Waiting before probing can be started */
+  MDNS_STATE_PROBE_WAIT,
+  /* Probing the unique records */
+  MDNS_STATE_PROBING,
+  /* Waiting before announcing the probed unique records */
+  MDNS_STATE_ANNOUNCE_WAIT,
+  /* Announcing all records */
+  MDNS_STATE_ANNOUNCING,
+  /* Probing and announcing completed */
+  MDNS_STATE_COMPLETE
+} mdns_resp_state_enum_t;
+
+/** Description of a host/netif */
+struct mdns_host {
+  /** Hostname */
+  char name[MDNS_LABEL_MAXLEN + 1];
+  /** Pointer to services */
+  struct mdns_service *services[MDNS_MAX_SERVICES];
+  /** Number of probes/announces sent for the current name */
+  u8_t sent_num;
+  /** State of the mdns responder */
+  mdns_resp_state_enum_t state;
+#if LWIP_IPV4
+  /** delayed msg struct for IPv4 */
+  struct mdns_delayed_msg ipv4;
+#endif
+#if LWIP_IPV6
+  /** delayed msg struct for IPv6 */
+  struct mdns_delayed_msg ipv6;
+#endif
+  /** Timestamp of probe conflict saved in list */
+  u32_t conflict_time[MDNS_PROBE_MAX_CONFLICTS_BEFORE_RATE_LIMIT];
+  /** Rate limit flag */
+  u8_t rate_limit_activated;
+  /** List index for timestamps */
+  u8_t index;
+  /** number of conflicts since startup */
+  u8_t num_conflicts;
+};
+
+struct mdns_host* netif_mdns_data(struct netif *netif);
+struct udp_pcb* get_mdns_pcb(void);
+
+#endif /* LWIP_MDNS_RESPONDER */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_MDNS_PRIV_H */

src/lwip/include/lwip/apps/mqtt.h

@@ -0,0 +1,205 @@
+/**
+ * @file
+ * MQTT client
+ */
+
+/*
+ * Copyright (c) 2016 Erik Andersson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Andersson
+ *
+ */
+#ifndef LWIP_HDR_APPS_MQTT_CLIENT_H
+#define LWIP_HDR_APPS_MQTT_CLIENT_H
+
+#include "lwip/apps/mqtt_opts.h"
+#include "lwip/err.h"
+#include "lwip/ip_addr.h"
+#include "lwip/prot/iana.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct mqtt_client_s mqtt_client_t;
+
+#if LWIP_ALTCP && LWIP_ALTCP_TLS
+struct altcp_tls_config;
+#endif
+
+/** @ingroup mqtt
+ * Default MQTT port (non-TLS) */
+#define MQTT_PORT     LWIP_IANA_PORT_MQTT
+/** @ingroup mqtt
+ * Default MQTT TLS port */
+#define MQTT_TLS_PORT LWIP_IANA_PORT_SECURE_MQTT
+
+/*---------------------------------------------------------------------------------------------- */
+/* Connection with server */
+
+/**
+ * @ingroup mqtt
+ * Client information and connection parameters */
+struct mqtt_connect_client_info_t {
+  /** Client identifier, must be set by caller */
+  const char *client_id;
+  /** User name, set to NULL if not used */
+  const char* client_user;
+  /** Password, set to NULL if not used */
+  const char* client_pass;
+  /** keep alive time in seconds, 0 to disable keep alive functionality*/
+  u16_t keep_alive;
+  /** will topic, set to NULL if will is not to be used,
+      will_msg, will_qos and will retain are then ignored */
+  const char* will_topic;
+  /** will_msg, see will_topic */
+  const char* will_msg;
+  /** will_qos, see will_topic */
+  u8_t will_qos;
+  /** will_retain, see will_topic */
+  u8_t will_retain;
+#if LWIP_ALTCP && LWIP_ALTCP_TLS
+  /** TLS configuration for secure connections */
+  struct altcp_tls_config *tls_config;
+#endif
+};
+
+/**
+ * @ingroup mqtt
+ * Connection status codes */
+typedef enum
+{
+  /** Accepted */
+  MQTT_CONNECT_ACCEPTED                 = 0,
+  /** Refused protocol version */
+  MQTT_CONNECT_REFUSED_PROTOCOL_VERSION = 1,
+  /** Refused identifier */
+  MQTT_CONNECT_REFUSED_IDENTIFIER       = 2,
+  /** Refused server */
+  MQTT_CONNECT_REFUSED_SERVER           = 3,
+  /** Refused user credentials */
+  MQTT_CONNECT_REFUSED_USERNAME_PASS    = 4,
+  /** Refused not authorized */
+  MQTT_CONNECT_REFUSED_NOT_AUTHORIZED_  = 5,
+  /** Disconnected */
+  MQTT_CONNECT_DISCONNECTED             = 256,
+  /** Timeout */
+  MQTT_CONNECT_TIMEOUT                  = 257
+} mqtt_connection_status_t;
+
+/**
+ * @ingroup mqtt
+ * Function prototype for mqtt connection status callback. Called when
+ * client has connected to the server after initiating a mqtt connection attempt by
+ * calling mqtt_client_connect() or when connection is closed by server or an error
+ *
+ * @param client MQTT client itself
+ * @param arg Additional argument to pass to the callback function
+ * @param status Connect result code or disconnection notification @see mqtt_connection_status_t
+ *
+ */
+typedef void (*mqtt_connection_cb_t)(mqtt_client_t *client, void *arg, mqtt_connection_status_t status);
+
+
+/**
+ * @ingroup mqtt
+ * Data callback flags */
+enum {
+  /** Flag set when last fragment of data arrives in data callback */
+  MQTT_DATA_FLAG_LAST = 1
+};
+
+/**
+ * @ingroup mqtt
+ * Function prototype for MQTT incoming publish data callback function. Called when data
+ * arrives to a subscribed topic @see mqtt_subscribe
+ *
+ * @param arg Additional argument to pass to the callback function
+ * @param data User data, pointed object, data may not be referenced after callback return,
+          NULL is passed when all publish data are delivered
+ * @param len Length of publish data fragment
+ * @param flags MQTT_DATA_FLAG_LAST set when this call contains the last part of data from publish message
+ *
+ */
+typedef void (*mqtt_incoming_data_cb_t)(void *arg, const u8_t *data, u16_t len, u8_t flags);
+
+
+/**
+ * @ingroup mqtt
+ * Function prototype for MQTT incoming publish function. Called when an incoming publish
+ * arrives to a subscribed topic @see mqtt_subscribe
+ *
+ * @param arg Additional argument to pass to the callback function
+ * @param topic Zero terminated Topic text string, topic may not be referenced after callback return
+ * @param tot_len Total length of publish data, if set to 0 (no publish payload) data callback will not be invoked
+ */
+typedef void (*mqtt_incoming_publish_cb_t)(void *arg, const char *topic, u32_t tot_len);
+
+
+/**
+ * @ingroup mqtt
+ * Function prototype for mqtt request callback. Called when a subscribe, unsubscribe
+ * or publish request has completed
+ * @param arg Pointer to user data supplied when invoking request
+ * @param err ERR_OK on success
+ *            ERR_TIMEOUT if no response was received within timeout,
+ *            ERR_ABRT if (un)subscribe was denied
+ */
+typedef void (*mqtt_request_cb_t)(void *arg, err_t err);
+
+
+err_t mqtt_client_connect(mqtt_client_t *client, const ip_addr_t *ipaddr, u16_t port, mqtt_connection_cb_t cb, void *arg,
+                   const struct mqtt_connect_client_info_t *client_info);
+
+void mqtt_disconnect(mqtt_client_t *client);
+
+mqtt_client_t *mqtt_client_new(void);
+void mqtt_client_free(mqtt_client_t* client);
+
+u8_t mqtt_client_is_connected(mqtt_client_t *client);
+
+void mqtt_set_inpub_callback(mqtt_client_t *client, mqtt_incoming_publish_cb_t pub_cb,
+                             mqtt_incoming_data_cb_t data_cb, void *arg);
+
+err_t mqtt_sub_unsub(mqtt_client_t *client, const char *topic, u8_t qos, mqtt_request_cb_t cb, void *arg, u8_t sub);
+
+/** @ingroup mqtt
+ *Subscribe to topic */
+#define mqtt_subscribe(client, topic, qos, cb, arg) mqtt_sub_unsub(client, topic, qos, cb, arg, 1)
+/** @ingroup mqtt
+ *  Unsubscribe to topic */
+#define mqtt_unsubscribe(client, topic, cb, arg) mqtt_sub_unsub(client, topic, 0, cb, arg, 0)
+
+err_t mqtt_publish(mqtt_client_t *client, const char *topic, const void *payload, u16_t payload_length, u8_t qos, u8_t retain,
+                                    mqtt_request_cb_t cb, void *arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_MQTT_CLIENT_H */

src/lwip/include/lwip/apps/mqtt_opts.h

@@ -0,0 +1,103 @@
+/**
+ * @file
+ * MQTT client options
+ */
+
+/*
+ * Copyright (c) 2016 Erik Andersson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Andersson
+ *
+ */
+#ifndef LWIP_HDR_APPS_MQTT_OPTS_H
+#define LWIP_HDR_APPS_MQTT_OPTS_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup mqtt_opts Options
+ * @ingroup mqtt
+ * @{
+ */
+
+/**
+ * Output ring-buffer size, must be able to fit largest outgoing publish message topic+payloads
+ */
+#ifndef MQTT_OUTPUT_RINGBUF_SIZE
+#define MQTT_OUTPUT_RINGBUF_SIZE 256
+#endif
+
+/**
+ * Number of bytes in receive buffer, must be at least the size of the longest incoming topic + 8
+ * If one wants to avoid fragmented incoming publish, set length to max incoming topic length + max payload length + 8
+ */
+#ifndef MQTT_VAR_HEADER_BUFFER_LEN
+#define MQTT_VAR_HEADER_BUFFER_LEN 128
+#endif
+
+/**
+ * Maximum number of pending subscribe, unsubscribe and publish requests to server .
+ */
+#ifndef MQTT_REQ_MAX_IN_FLIGHT
+#define MQTT_REQ_MAX_IN_FLIGHT 4
+#endif
+
+/**
+ * Seconds between each cyclic timer call.
+ */
+#ifndef MQTT_CYCLIC_TIMER_INTERVAL
+#define MQTT_CYCLIC_TIMER_INTERVAL 5
+#endif
+
+/**
+ * Publish, subscribe and unsubscribe request timeout in seconds.
+ */
+#ifndef MQTT_REQ_TIMEOUT
+#define MQTT_REQ_TIMEOUT 30
+#endif
+
+/**
+ * Seconds for MQTT connect response timeout after sending connect request
+ */
+#ifndef MQTT_CONNECT_TIMOUT
+#define MQTT_CONNECT_TIMOUT 100
+#endif
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_MQTT_OPTS_H */

src/lwip/include/lwip/apps/mqtt_priv.h

@@ -0,0 +1,104 @@
+/**
+ * @file
+ * MQTT client (private interface)
+ */
+
+/*
+ * Copyright (c) 2016 Erik Andersson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Erik Andersson
+ *
+ */
+#ifndef LWIP_HDR_APPS_MQTT_PRIV_H
+#define LWIP_HDR_APPS_MQTT_PRIV_H
+
+#include "lwip/apps/mqtt.h"
+#include "lwip/altcp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Pending request item, binds application callback to pending server requests */
+struct mqtt_request_t
+{
+  /** Next item in list, NULL means this is the last in chain,
+      next pointing at itself means request is unallocated */
+  struct mqtt_request_t *next;
+  /** Callback to upper layer */
+  mqtt_request_cb_t cb;
+  void *arg;
+  /** MQTT packet identifier */
+  u16_t pkt_id;
+  /** Expire time relative to element before this  */
+  u16_t timeout_diff;
+};
+
+/** Ring buffer */
+struct mqtt_ringbuf_t {
+  u16_t put;
+  u16_t get;
+  u8_t buf[MQTT_OUTPUT_RINGBUF_SIZE];
+};
+
+/** MQTT client */
+struct mqtt_client_s
+{
+  /** Timers and timeouts */
+  u16_t cyclic_tick;
+  u16_t keep_alive;
+  u16_t server_watchdog;
+  /** Packet identifier generator*/
+  u16_t pkt_id_seq;
+  /** Packet identifier of pending incoming publish */
+  u16_t inpub_pkt_id;
+  /** Connection state */
+  u8_t conn_state;
+  struct altcp_pcb *conn;
+  /** Connection callback */
+  void *connect_arg;
+  mqtt_connection_cb_t connect_cb;
+  /** Pending requests to server */
+  struct mqtt_request_t *pend_req_queue;
+  struct mqtt_request_t req_list[MQTT_REQ_MAX_IN_FLIGHT];
+  void *inpub_arg;
+  /** Incoming data callback */
+  mqtt_incoming_data_cb_t data_cb;
+  mqtt_incoming_publish_cb_t pub_cb;
+  /** Input */
+  u32_t msg_idx;
+  u8_t rx_buffer[MQTT_VAR_HEADER_BUFFER_LEN];
+  /** Output ring-buffer */
+  struct mqtt_ringbuf_t output;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_MQTT_PRIV_H */

src/lwip/include/lwip/apps/netbiosns.h

@@ -0,0 +1,51 @@
+/**
+ * @file
+ * NETBIOS name service responder
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+#ifndef LWIP_HDR_APPS_NETBIOS_H
+#define LWIP_HDR_APPS_NETBIOS_H
+
+#include "lwip/apps/netbiosns_opts.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void netbiosns_init(void);
+#ifndef NETBIOS_LWIP_NAME
+void netbiosns_set_name(const char* hostname);
+#endif
+void netbiosns_stop(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_NETBIOS_H */

src/lwip/include/lwip/apps/netbiosns_opts.h

@@ -0,0 +1,66 @@
+/**
+ * @file
+ * NETBIOS name service responder options
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+#ifndef LWIP_HDR_APPS_NETBIOS_OPTS_H
+#define LWIP_HDR_APPS_NETBIOS_OPTS_H
+
+#include "lwip/opt.h"
+
+/**
+ * @defgroup netbiosns_opts Options
+ * @ingroup netbiosns
+ * @{
+ */
+
+/** NetBIOS name of lwip device
+ * This must be uppercase until NETBIOS_STRCMP() is defined to a string
+ * comparison function that is case insensitive.
+ * If you want to use the netif's hostname, use this (with LWIP_NETIF_HOSTNAME):
+ * (ip_current_netif() != NULL ? ip_current_netif()->hostname != NULL ? ip_current_netif()->hostname : "" : "")
+ *
+ * If this is not defined, netbiosns_set_name() can be called at runtime to change the name.
+ */
+#ifdef __DOXYGEN__
+#define NETBIOS_LWIP_NAME "NETBIOSLWIPDEV"
+#endif
+
+/** Respond to NetBIOS name queries
+ * Default is disabled
+ */
+#if !defined LWIP_NETBIOS_RESPOND_NAME_QUERY || defined __DOXYGEN__
+#define LWIP_NETBIOS_RESPOND_NAME_QUERY   0
+#endif
+
+/**
+ * @}
+ */
+
+#endif /* LWIP_HDR_APPS_NETBIOS_OPTS_H */

src/lwip/include/lwip/apps/smtp.h

@@ -0,0 +1,128 @@
+#ifndef LWIP_HDR_APPS_SMTP_H
+#define LWIP_HDR_APPS_SMTP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lwip/apps/smtp_opts.h"
+#include "lwip/err.h"
+#include "lwip/prot/iana.h"
+
+/** The default TCP port used for SMTP */
+#define SMTP_DEFAULT_PORT         LWIP_IANA_PORT_SMTP
+/** The default TCP port used for SMTPS */
+#define SMTPS_DEFAULT_PORT        LWIP_IANA_PORT_SMTPS
+
+/** Email successfully sent */
+#define SMTP_RESULT_OK            0
+/** Unknown error */
+#define SMTP_RESULT_ERR_UNKNOWN   1
+/** Connection to server failed */
+#define SMTP_RESULT_ERR_CONNECT   2
+/** Failed to resolve server hostname */
+#define SMTP_RESULT_ERR_HOSTNAME  3
+/** Connection unexpectedly closed by remote server */
+#define SMTP_RESULT_ERR_CLOSED    4
+/** Connection timed out (server didn't respond in time) */
+#define SMTP_RESULT_ERR_TIMEOUT   5
+/** Server responded with an unknown response code */
+#define SMTP_RESULT_ERR_SVR_RESP  6
+/** Out of resources locally */
+#define SMTP_RESULT_ERR_MEM       7
+
+/** Prototype of an smtp callback function
+ *
+ * @param arg argument specified when initiating the email
+ * @param smtp_result result of the mail transfer (see defines SMTP_RESULT_*)
+ * @param srv_err if aborted by the server, this contains the error code received
+ * @param err an error returned by internal lwip functions, can help to specify
+ *            the source of the error but must not necessarily be != ERR_OK
+ */
+typedef void (*smtp_result_fn)(void *arg, u8_t smtp_result, u16_t srv_err, err_t err);
+
+/** This structure is used as argument for smtp_send_mail_int(),
+ * which in turn can be used with tcpip_callback() to send mail
+ * from interrupt context, e.g. like this:
+ *    struct smtp_send_request *req; (to be filled)
+ *    tcpip_try_callback(smtp_send_mail_int, (void*)req);
+ *
+ * For member description, see parameter description of smtp_send_mail().
+ * When using with tcpip_callback, this structure has to stay allocated
+ * (e.g. using mem_malloc/mem_free) until its 'callback_fn' is called.
+ */
+struct smtp_send_request {
+  const char *from;
+  const char* to;
+  const char* subject;
+  const char* body;
+  smtp_result_fn callback_fn;
+  void* callback_arg;
+  /** If this is != 0, data is *not* copied into an extra buffer
+   * but used from the pointers supplied in this struct.
+   * This means less memory usage, but data must stay untouched until
+   * the callback function is called. */
+  u8_t static_data;
+};
+
+
+#if SMTP_BODYDH
+
+#ifndef SMTP_BODYDH_BUFFER_SIZE
+#define SMTP_BODYDH_BUFFER_SIZE 256
+#endif /* SMTP_BODYDH_BUFFER_SIZE */
+
+struct smtp_bodydh {
+  u16_t state;
+  u16_t length; /* Length of content in buffer */
+  char buffer[SMTP_BODYDH_BUFFER_SIZE]; /* buffer for generated content */
+#ifdef SMTP_BODYDH_USER_SIZE
+  u8_t user[SMTP_BODYDH_USER_SIZE];
+#endif /* SMTP_BODYDH_USER_SIZE */
+};
+
+enum bdh_retvals_e {
+  BDH_DONE = 0,
+  BDH_WORKING
+};
+
+/** Prototype of an smtp body callback function
+ * It receives a struct smtp_bodydh, and a buffer to write data,
+ * must return BDH_WORKING to be called again and BDH_DONE when
+ * it has finished processing. This one tries to fill one TCP buffer with
+ * data, your function will be repeatedly called until that happens; so if you
+ * know you'll be taking too long to serve your request, pause once in a while
+ * by writing length=0 to avoid hogging system resources
+ *
+ * @param arg argument specified when initiating the email
+ * @param smtp_bodydh state handling + buffer structure
+ */
+typedef int (*smtp_bodycback_fn)(void *arg, struct smtp_bodydh *bodydh);
+
+err_t smtp_send_mail_bodycback(const char *from, const char* to, const char* subject,
+                     smtp_bodycback_fn bodycback_fn, smtp_result_fn callback_fn, void* callback_arg);
+
+#endif /* SMTP_BODYDH */
+
+
+err_t smtp_set_server_addr(const char* server);
+void smtp_set_server_port(u16_t port);
+#if LWIP_ALTCP && LWIP_ALTCP_TLS
+struct altcp_tls_config;
+void smtp_set_tls_config(struct altcp_tls_config *tls_config);
+#endif
+err_t smtp_set_auth(const char* username, const char* pass);
+err_t smtp_send_mail(const char *from, const char* to, const char* subject, const char* body,
+                     smtp_result_fn callback_fn, void* callback_arg);
+err_t smtp_send_mail_static(const char *from, const char* to, const char* subject, const char* body,
+                     smtp_result_fn callback_fn, void* callback_arg);
+void smtp_send_mail_int(void *arg);
+#ifdef LWIP_DEBUG
+const char* smtp_result_str(u8_t smtp_result);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SMTP_H */

src/lwip/include/lwip/apps/smtp_opts.h

@@ -0,0 +1,80 @@
+#ifndef LWIP_HDR_APPS_SMTP_OPTS_H
+#define LWIP_HDR_APPS_SMTP_OPTS_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup smtp_opts Options
+ * @ingroup smtp
+ *
+ * @{
+ */
+
+/** Set this to 1 to enable data handler callback on BODY */
+#ifndef SMTP_BODYDH
+#define SMTP_BODYDH             0
+#endif
+
+/** SMTP_DEBUG: Enable debugging for SNTP. */
+#ifndef SMTP_DEBUG
+#define SMTP_DEBUG              LWIP_DBG_OFF
+#endif
+
+/** Maximum length reserved for server name including terminating 0 byte */
+#ifndef SMTP_MAX_SERVERNAME_LEN
+#define SMTP_MAX_SERVERNAME_LEN 256
+#endif
+
+/** Maximum length reserved for username */
+#ifndef SMTP_MAX_USERNAME_LEN
+#define SMTP_MAX_USERNAME_LEN   32
+#endif
+
+/** Maximum length reserved for password */
+#ifndef SMTP_MAX_PASS_LEN
+#define SMTP_MAX_PASS_LEN       32
+#endif
+
+/** Set this to 0 if you know the authentication data will not change
+ * during the smtp session, which saves some heap space. */
+#ifndef SMTP_COPY_AUTHDATA
+#define SMTP_COPY_AUTHDATA      1
+#endif
+
+/** Set this to 0 to save some code space if you know for sure that all data
+ * passed to this module conforms to the requirements in the SMTP RFC.
+ * WARNING: use this with care!
+ */
+#ifndef SMTP_CHECK_DATA
+#define SMTP_CHECK_DATA         1
+#endif
+
+/** Set this to 1 to enable AUTH PLAIN support */
+#ifndef SMTP_SUPPORT_AUTH_PLAIN
+#define SMTP_SUPPORT_AUTH_PLAIN 1
+#endif
+
+/** Set this to 1 to enable AUTH LOGIN support */
+#ifndef SMTP_SUPPORT_AUTH_LOGIN
+#define SMTP_SUPPORT_AUTH_LOGIN 1
+#endif
+
+/* Memory allocation/deallocation can be overridden... */
+#ifndef SMTP_STATE_MALLOC
+#define SMTP_STATE_MALLOC(size)       mem_malloc(size)
+#define SMTP_STATE_FREE(ptr)          mem_free(ptr)
+#endif
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SMTP_OPTS_H */

src/lwip/include/lwip/apps/snmp.h

@@ -0,0 +1,145 @@
+/**
+ * @file
+ * SNMP server main API - start and basic configuration
+ */
+
+/*
+ * Copyright (c) 2001, 2002 Leon Woestenberg <leon.woestenberg@axon.tv>
+ * Copyright (c) 2001, 2002 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Leon Woestenberg <leon.woestenberg@axon.tv>
+ *         Martin Hentschel <info@cl-soft.de>
+ *
+ */
+#ifndef LWIP_HDR_APPS_SNMP_H
+#define LWIP_HDR_APPS_SNMP_H
+
+#include "lwip/apps/snmp_opts.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/err.h"
+#include "lwip/apps/snmp_core.h"
+
+/** SNMP variable binding descriptor (publicly needed for traps) */
+struct snmp_varbind
+{
+  /** pointer to next varbind, NULL for last in list */
+  struct snmp_varbind *next;
+  /** pointer to previous varbind, NULL for first in list */
+  struct snmp_varbind *prev;
+
+  /** object identifier */
+  struct snmp_obj_id oid;
+
+  /** value ASN1 type */
+  u8_t type;
+  /** object value length */
+  u16_t value_len;
+  /** object value */
+  void *value;
+};
+
+/**
+ * @ingroup snmp_core
+ * Agent setup, start listening to port 161.
+ */
+void snmp_init(void);
+void snmp_set_mibs(const struct snmp_mib **mibs, u8_t num_mibs);
+
+void snmp_set_device_enterprise_oid(const struct snmp_obj_id* device_enterprise_oid);
+const struct snmp_obj_id* snmp_get_device_enterprise_oid(void);
+
+void snmp_trap_dst_enable(u8_t dst_idx, u8_t enable);
+void snmp_trap_dst_ip_set(u8_t dst_idx, const ip_addr_t *dst);
+
+/** Generic trap: cold start */
+#define SNMP_GENTRAP_COLDSTART 0
+/** Generic trap: warm start */
+#define SNMP_GENTRAP_WARMSTART 1
+/** Generic trap: link down */
+#define SNMP_GENTRAP_LINKDOWN 2
+/** Generic trap: link up */
+#define SNMP_GENTRAP_LINKUP 3
+/** Generic trap: authentication failure */
+#define SNMP_GENTRAP_AUTH_FAILURE 4
+/** Generic trap: EGP neighbor lost */
+#define SNMP_GENTRAP_EGP_NEIGHBOR_LOSS 5
+/** Generic trap: enterprise specific */
+#define SNMP_GENTRAP_ENTERPRISE_SPECIFIC 6
+
+err_t snmp_send_trap_generic(s32_t generic_trap);
+err_t snmp_send_trap_specific(s32_t specific_trap, struct snmp_varbind *varbinds);
+err_t snmp_send_trap(const struct snmp_obj_id* oid, s32_t generic_trap, s32_t specific_trap, struct snmp_varbind *varbinds);
+
+err_t snmp_send_inform_generic(s32_t generic_trap, struct snmp_varbind *varbinds, s32_t *ptr_request_id);
+err_t snmp_send_inform_specific(s32_t specific_trap, struct snmp_varbind *varbinds, s32_t *ptr_request_id);
+err_t snmp_send_inform(const struct snmp_obj_id* oid, s32_t generic_trap, s32_t specific_trap, struct snmp_varbind *varbinds, s32_t *ptr_request_id);
+struct snmp_request;
+typedef void (*snmp_inform_callback_fct)(struct snmp_request *request, void* callback_arg);
+void snmp_set_inform_callback(snmp_inform_callback_fct inform_callback, void* callback_arg);
+
+void snmp_set_default_trap_version(u8_t snmp_version);
+u8_t snmp_get_default_trap_version(void);
+
+#define SNMP_AUTH_TRAPS_DISABLED 0
+#define SNMP_AUTH_TRAPS_ENABLED  1
+void snmp_set_auth_traps_enabled(u8_t enable);
+u8_t snmp_get_auth_traps_enabled(void);
+
+u8_t snmp_v1_enabled(void);
+u8_t snmp_v2c_enabled(void);
+u8_t snmp_v3_enabled(void);
+void snmp_v1_enable(u8_t enable);
+void snmp_v2c_enable(u8_t enable);
+void snmp_v3_enable(u8_t enable);
+
+const char * snmp_get_community(void);
+const char * snmp_get_community_write(void);
+const char * snmp_get_community_trap(void);
+void snmp_set_community(const char * const community);
+void snmp_set_community_write(const char * const community);
+void snmp_set_community_trap(const char * const community);
+
+void snmp_coldstart_trap(void);
+void snmp_authfail_trap(void);
+
+typedef void (*snmp_write_callback_fct)(const u32_t* oid, u8_t oid_len, void* callback_arg);
+void snmp_set_write_callback(snmp_write_callback_fct write_callback, void* callback_arg);
+
+#endif /* LWIP_SNMP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SNMP_H */

src/lwip/include/lwip/apps/snmp_core.h

@@ -0,0 +1,377 @@
+/**
+ * @file
+ * SNMP core API for implementing MIBs
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ *         Martin Hentschel <info@cl-soft.de>
+ */
+
+#ifndef LWIP_HDR_APPS_SNMP_CORE_H
+#define LWIP_HDR_APPS_SNMP_CORE_H
+
+#include "lwip/apps/snmp_opts.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* basic ASN1 defines */
+#define SNMP_ASN1_CLASS_UNIVERSAL   0x00
+#define SNMP_ASN1_CLASS_APPLICATION 0x40
+#define SNMP_ASN1_CLASS_CONTEXT     0x80
+#define SNMP_ASN1_CLASS_PRIVATE     0xC0
+
+#define SNMP_ASN1_CONTENTTYPE_PRIMITIVE   0x00
+#define SNMP_ASN1_CONTENTTYPE_CONSTRUCTED 0x20
+
+/* universal tags (from ASN.1 spec.) */
+#define SNMP_ASN1_UNIVERSAL_END_OF_CONTENT  0
+#define SNMP_ASN1_UNIVERSAL_INTEGER         2
+#define SNMP_ASN1_UNIVERSAL_OCTET_STRING    4
+#define SNMP_ASN1_UNIVERSAL_NULL            5
+#define SNMP_ASN1_UNIVERSAL_OBJECT_ID       6
+#define SNMP_ASN1_UNIVERSAL_SEQUENCE_OF    16
+
+/* application specific (SNMP) tags (from SNMPv2-SMI) */
+#define SNMP_ASN1_APPLICATION_IPADDR    0  /* [APPLICATION 0] IMPLICIT OCTET STRING (SIZE (4)) */
+#define SNMP_ASN1_APPLICATION_COUNTER   1  /* [APPLICATION 1] IMPLICIT INTEGER (0..4294967295) => u32_t */
+#define SNMP_ASN1_APPLICATION_GAUGE     2  /* [APPLICATION 2] IMPLICIT INTEGER (0..4294967295) => u32_t */
+#define SNMP_ASN1_APPLICATION_TIMETICKS 3  /* [APPLICATION 3] IMPLICIT INTEGER (0..4294967295) => u32_t */
+#define SNMP_ASN1_APPLICATION_OPAQUE    4  /* [APPLICATION 4] IMPLICIT OCTET STRING */
+#define SNMP_ASN1_APPLICATION_COUNTER64 6  /* [APPLICATION 6] IMPLICIT INTEGER (0..18446744073709551615) */
+
+/* context specific (SNMP) tags (from RFC 1905) */
+#define SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_INSTANCE 1
+
+/* full ASN1 type defines */
+#define SNMP_ASN1_TYPE_END_OF_CONTENT (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_END_OF_CONTENT)
+#define SNMP_ASN1_TYPE_INTEGER        (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_INTEGER)
+#define SNMP_ASN1_TYPE_OCTET_STRING   (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_OCTET_STRING)
+#define SNMP_ASN1_TYPE_NULL           (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_NULL)
+#define SNMP_ASN1_TYPE_OBJECT_ID      (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_UNIVERSAL_OBJECT_ID)
+#define SNMP_ASN1_TYPE_SEQUENCE       (SNMP_ASN1_CLASS_UNIVERSAL | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_UNIVERSAL_SEQUENCE_OF)
+#define SNMP_ASN1_TYPE_IPADDR         (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_IPADDR)
+#define SNMP_ASN1_TYPE_IPADDRESS      SNMP_ASN1_TYPE_IPADDR
+#define SNMP_ASN1_TYPE_COUNTER        (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_COUNTER)
+#define SNMP_ASN1_TYPE_COUNTER32      SNMP_ASN1_TYPE_COUNTER
+#define SNMP_ASN1_TYPE_GAUGE          (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_GAUGE)
+#define SNMP_ASN1_TYPE_GAUGE32        SNMP_ASN1_TYPE_GAUGE
+#define SNMP_ASN1_TYPE_UNSIGNED32     SNMP_ASN1_TYPE_GAUGE
+#define SNMP_ASN1_TYPE_TIMETICKS      (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_TIMETICKS)
+#define SNMP_ASN1_TYPE_OPAQUE         (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_OPAQUE)
+#if LWIP_HAVE_INT64
+#define SNMP_ASN1_TYPE_COUNTER64      (SNMP_ASN1_CLASS_APPLICATION | SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_APPLICATION_COUNTER64)
+#endif
+
+#define SNMP_VARBIND_EXCEPTION_OFFSET 0xF0
+#define SNMP_VARBIND_EXCEPTION_MASK   0x0F
+
+/** error codes predefined by SNMP prot. */
+typedef enum {
+  SNMP_ERR_NOERROR             = 0,
+/*
+outdated v1 error codes. do not use anmore!
+#define SNMP_ERR_NOSUCHNAME 2  use SNMP_ERR_NOSUCHINSTANCE instead
+#define SNMP_ERR_BADVALUE   3  use SNMP_ERR_WRONGTYPE,SNMP_ERR_WRONGLENGTH,SNMP_ERR_WRONGENCODING or SNMP_ERR_WRONGVALUE instead
+#define SNMP_ERR_READONLY   4  use SNMP_ERR_NOTWRITABLE instead
+*/
+  SNMP_ERR_GENERROR            = 5,
+  SNMP_ERR_NOACCESS            = 6,
+  SNMP_ERR_WRONGTYPE           = 7,
+  SNMP_ERR_WRONGLENGTH         = 8,
+  SNMP_ERR_WRONGENCODING       = 9,
+  SNMP_ERR_WRONGVALUE          = 10,
+  SNMP_ERR_NOCREATION          = 11,
+  SNMP_ERR_INCONSISTENTVALUE   = 12,
+  SNMP_ERR_RESOURCEUNAVAILABLE = 13,
+  SNMP_ERR_COMMITFAILED        = 14,
+  SNMP_ERR_UNDOFAILED          = 15,
+  SNMP_ERR_NOTWRITABLE         = 17,
+  SNMP_ERR_INCONSISTENTNAME    = 18,
+
+  SNMP_ERR_NOSUCHINSTANCE      = SNMP_VARBIND_EXCEPTION_OFFSET + SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_INSTANCE
+} snmp_err_t;
+
+/** internal object identifier representation */
+struct snmp_obj_id
+{
+  u8_t len;
+  u32_t id[SNMP_MAX_OBJ_ID_LEN];
+};
+
+struct snmp_obj_id_const_ref
+{
+  u8_t len;
+  const u32_t* id;
+};
+
+extern const struct snmp_obj_id_const_ref snmp_zero_dot_zero; /* administrative identifier from SNMPv2-SMI */
+
+/** SNMP variant value, used as reference in struct snmp_node_instance and table implementation */
+union snmp_variant_value
+{
+  void* ptr;
+  const void* const_ptr;
+  u32_t u32;
+  s32_t s32;
+#if LWIP_HAVE_INT64
+  u64_t u64;
+#endif
+};
+
+
+/**
+SNMP MIB node types
+ tree node is the only node the stack can process in order to walk the tree,
+ all other nodes are assumed to be leaf nodes.
+ This cannot be an enum because users may want to define their own node types.
+*/
+#define SNMP_NODE_TREE         0x00
+/* predefined leaf node types */
+#define SNMP_NODE_SCALAR       0x01
+#define SNMP_NODE_SCALAR_ARRAY 0x02
+#define SNMP_NODE_TABLE        0x03
+#define SNMP_NODE_THREADSYNC   0x04
+
+/** node "base class" layout, the mandatory fields for a node  */
+struct snmp_node
+{
+  /** one out of SNMP_NODE_TREE or any leaf node type (like SNMP_NODE_SCALAR) */
+  u8_t node_type;
+  /** the number assigned to this node which used as part of the full OID */
+  u32_t oid;
+};
+
+/** SNMP node instance access types */
+typedef enum {
+  SNMP_NODE_INSTANCE_ACCESS_READ    = 1,
+  SNMP_NODE_INSTANCE_ACCESS_WRITE   = 2,
+  SNMP_NODE_INSTANCE_READ_ONLY      = SNMP_NODE_INSTANCE_ACCESS_READ,
+  SNMP_NODE_INSTANCE_READ_WRITE     = (SNMP_NODE_INSTANCE_ACCESS_READ | SNMP_NODE_INSTANCE_ACCESS_WRITE),
+  SNMP_NODE_INSTANCE_WRITE_ONLY     = SNMP_NODE_INSTANCE_ACCESS_WRITE,
+  SNMP_NODE_INSTANCE_NOT_ACCESSIBLE = 0
+} snmp_access_t;
+
+struct snmp_node_instance;
+
+typedef s16_t (*node_instance_get_value_method)(struct snmp_node_instance*, void*);
+typedef snmp_err_t (*node_instance_set_test_method)(struct snmp_node_instance*, u16_t, void*);
+typedef snmp_err_t (*node_instance_set_value_method)(struct snmp_node_instance*, u16_t, void*);
+typedef void (*node_instance_release_method)(struct snmp_node_instance*);
+
+#define SNMP_GET_VALUE_RAW_DATA 0x4000  /* do not use 0x8000 because return value of node_instance_get_value_method is signed16 and 0x8000 would be the signed bit */
+
+/** SNMP node instance */
+struct snmp_node_instance
+{
+  /** prefilled with the node, get_instance() is called on; may be changed by user to any value to pass an arbitrary node between calls to get_instance() and get_value/test_value/set_value */
+  const struct snmp_node* node;
+  /** prefilled with the instance id requested; for get_instance() this is the exact oid requested; for get_next_instance() this is the relative starting point, stack expects relative oid of next node here */
+  struct snmp_obj_id instance_oid;
+
+  /** ASN type for this object (see snmp_asn1.h for definitions) */
+  u8_t asn1_type;
+  /** one out of instance access types defined above (SNMP_NODE_INSTANCE_READ_ONLY,...) */
+  snmp_access_t access;
+
+  /** returns object value for the given object identifier. Return values <0 to indicate an error */
+  node_instance_get_value_method get_value;
+  /** tests length and/or range BEFORE setting */
+  node_instance_set_test_method set_test;
+  /** sets object value, only called when set_test() was successful */
+  node_instance_set_value_method set_value;
+  /** called in any case when the instance is not required anymore by stack (useful for freeing memory allocated in get_instance/get_next_instance methods) */
+  node_instance_release_method release_instance;
+
+  /** reference to pass arbitrary value between calls to get_instance() and get_value/test_value/set_value */
+  union snmp_variant_value reference;
+  /** see reference (if reference is a pointer, the length of underlying data may be stored here or anything else) */
+  u32_t reference_len;
+};
+
+
+/** SNMP tree node */
+struct snmp_tree_node
+{
+  /** inherited "base class" members */
+  struct snmp_node node;
+  u16_t subnode_count;
+  const struct snmp_node* const *subnodes;
+};
+
+#define SNMP_CREATE_TREE_NODE(oid, subnodes) \
+  {{ SNMP_NODE_TREE, (oid) }, \
+  (u16_t)LWIP_ARRAYSIZE(subnodes), (subnodes) }
+
+#define SNMP_CREATE_EMPTY_TREE_NODE(oid) \
+  {{ SNMP_NODE_TREE, (oid) }, \
+  0, NULL }
+
+/** SNMP leaf node */
+struct snmp_leaf_node
+{
+  /** inherited "base class" members */
+  struct snmp_node node;
+  snmp_err_t (*get_instance)(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+  snmp_err_t (*get_next_instance)(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+};
+
+/** represents a single mib with its base oid and root node */
+struct snmp_mib
+{
+  const u32_t *base_oid;
+  u8_t base_oid_len;
+  const struct snmp_node *root_node;
+};
+
+#define SNMP_MIB_CREATE(oid_list, root_node) { (oid_list), (u8_t)LWIP_ARRAYSIZE(oid_list), root_node }
+
+/** OID range structure */
+struct snmp_oid_range
+{
+  u32_t min;
+  u32_t max;
+};
+
+/** checks if incoming OID length and values are in allowed ranges */
+u8_t snmp_oid_in_range(const u32_t *oid_in, u8_t oid_len, const struct snmp_oid_range *oid_ranges, u8_t oid_ranges_len);
+
+typedef enum {
+  SNMP_NEXT_OID_STATUS_SUCCESS,
+  SNMP_NEXT_OID_STATUS_NO_MATCH,
+  SNMP_NEXT_OID_STATUS_BUF_TO_SMALL
+} snmp_next_oid_status_t;
+
+/** state for next_oid_init / next_oid_check functions */
+struct snmp_next_oid_state
+{
+  const u32_t* start_oid;
+  u8_t start_oid_len;
+
+  u32_t* next_oid;
+  u8_t next_oid_len;
+  u8_t next_oid_max_len;
+
+  snmp_next_oid_status_t status;
+  void* reference;
+};
+
+void snmp_next_oid_init(struct snmp_next_oid_state *state,
+  const u32_t *start_oid, u8_t start_oid_len,
+  u32_t *next_oid_buf, u8_t next_oid_max_len);
+u8_t snmp_next_oid_precheck(struct snmp_next_oid_state *state, const u32_t *oid, u8_t oid_len);
+u8_t snmp_next_oid_check(struct snmp_next_oid_state *state, const u32_t *oid, u8_t oid_len, void* reference);
+
+void snmp_oid_assign(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len);
+void snmp_oid_combine(struct snmp_obj_id* target, const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len);
+void snmp_oid_prefix(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len);
+void snmp_oid_append(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len);
+u8_t snmp_oid_equal(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len);
+s8_t snmp_oid_compare(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len);
+
+#if LWIP_IPV4
+u8_t snmp_oid_to_ip4(const u32_t *oid, ip4_addr_t *ip);
+void snmp_ip4_to_oid(const ip4_addr_t *ip, u32_t *oid);
+#endif /* LWIP_IPV4 */
+#if LWIP_IPV6
+u8_t snmp_oid_to_ip6(const u32_t *oid, ip6_addr_t *ip);
+void snmp_ip6_to_oid(const ip6_addr_t *ip, u32_t *oid);
+#endif /* LWIP_IPV6 */
+#if LWIP_IPV4 || LWIP_IPV6
+u8_t snmp_ip_to_oid(const ip_addr_t *ip, u32_t *oid);
+u8_t snmp_ip_port_to_oid(const ip_addr_t *ip, u16_t port, u32_t *oid);
+
+u8_t snmp_oid_to_ip(const u32_t *oid, u8_t oid_len, ip_addr_t *ip);
+u8_t snmp_oid_to_ip_port(const u32_t *oid, u8_t oid_len, ip_addr_t *ip, u16_t *port);
+#endif /* LWIP_IPV4 || LWIP_IPV6 */
+
+struct netif;
+u8_t netif_to_num(const struct netif *netif);
+
+snmp_err_t snmp_set_test_ok(struct snmp_node_instance* instance, u16_t value_len, void* value); /* generic function which can be used if test is always successful */
+
+err_t snmp_decode_bits(const u8_t *buf, u32_t buf_len, u32_t *bit_value);
+err_t snmp_decode_truthvalue(const s32_t *asn1_value, u8_t *bool_value);
+u8_t  snmp_encode_bits(u8_t *buf, u32_t buf_len, u32_t bit_value, u8_t bit_count);
+u8_t  snmp_encode_truthvalue(s32_t *asn1_value, u32_t bool_value);
+
+struct snmp_statistics
+{
+  u32_t inpkts;
+  u32_t outpkts;
+  u32_t inbadversions;
+  u32_t inbadcommunitynames;
+  u32_t inbadcommunityuses;
+  u32_t inasnparseerrs;
+  u32_t intoobigs;
+  u32_t innosuchnames;
+  u32_t inbadvalues;
+  u32_t inreadonlys;
+  u32_t ingenerrs;
+  u32_t intotalreqvars;
+  u32_t intotalsetvars;
+  u32_t ingetrequests;
+  u32_t ingetnexts;
+  u32_t insetrequests;
+  u32_t ingetresponses;
+  u32_t intraps;
+  u32_t outtoobigs;
+  u32_t outnosuchnames;
+  u32_t outbadvalues;
+  u32_t outgenerrs;
+  u32_t outgetrequests;
+  u32_t outgetnexts;
+  u32_t outsetrequests;
+  u32_t outgetresponses;
+  u32_t outtraps;
+#if LWIP_SNMP_V3
+  u32_t unsupportedseclevels;
+  u32_t notintimewindows;
+  u32_t unknownusernames;
+  u32_t unknownengineids;
+  u32_t wrongdigests;
+  u32_t decryptionerrors;
+#endif
+};
+
+extern struct snmp_statistics snmp_stats;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_SNMP */
+
+#endif /* LWIP_HDR_APPS_SNMP_CORE_H */

src/lwip/include/lwip/apps/snmp_mib2.h

@@ -0,0 +1,78 @@
+/**
+ * @file
+ * SNMP MIB2 API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Dirk Ziegelmeier <dziegel@gmx.de>
+ *
+ */
+#ifndef LWIP_HDR_APPS_SNMP_MIB2_H
+#define LWIP_HDR_APPS_SNMP_MIB2_H
+
+#include "lwip/apps/snmp_opts.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+#if SNMP_LWIP_MIB2
+
+#include "lwip/apps/snmp_core.h"
+
+extern const struct snmp_mib mib2;
+
+#if SNMP_USE_NETCONN
+#include "lwip/apps/snmp_threadsync.h"
+void snmp_mib2_lwip_synchronizer(snmp_threadsync_called_fn fn, void* arg);
+extern struct snmp_threadsync_instance snmp_mib2_lwip_locks;
+#endif
+
+#ifndef SNMP_SYSSERVICES
+#define SNMP_SYSSERVICES ((1 << 6) | (1 << 3) | ((IP_FORWARD) << 2))
+#endif
+
+void snmp_mib2_set_sysdescr(const u8_t* str, const u16_t* len); /* read-only be definition */
+void snmp_mib2_set_syscontact(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize);
+void snmp_mib2_set_syscontact_readonly(const u8_t *ocstr, const u16_t *ocstrlen);
+void snmp_mib2_set_sysname(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize);
+void snmp_mib2_set_sysname_readonly(const u8_t *ocstr, const u16_t *ocstrlen);
+void snmp_mib2_set_syslocation(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize);
+void snmp_mib2_set_syslocation_readonly(const u8_t *ocstr, const u16_t *ocstrlen);
+
+#endif /* SNMP_LWIP_MIB2 */
+#endif /* LWIP_SNMP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SNMP_MIB2_H */

src/lwip/include/lwip/apps/snmp_opts.h

@@ -0,0 +1,297 @@
+/**
+ * @file
+ * SNMP server options list
+ */
+
+/*
+ * Copyright (c) 2015 Dirk Ziegelmeier
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Dirk Ziegelmeier
+ *
+ */
+#ifndef LWIP_HDR_SNMP_OPTS_H
+#define LWIP_HDR_SNMP_OPTS_H
+
+#include "lwip/opt.h"
+
+/**
+ * @defgroup snmp_opts Options
+ * @ingroup snmp
+ * @{
+ */
+
+/**
+ * LWIP_SNMP==1: This enables the lwIP SNMP agent. UDP must be available
+ * for SNMP transport.
+ * If you want to use your own SNMP agent, leave this disabled.
+ * To integrate MIB2 of an external agent, you need to enable
+ * LWIP_MIB2_CALLBACKS and MIB2_STATS. This will give you the callbacks
+ * and statistics counters you need to get MIB2 working.
+ */
+#if !defined LWIP_SNMP || defined __DOXYGEN__
+#define LWIP_SNMP                       0
+#endif
+
+/**
+ * SNMP_USE_NETCONN: Use netconn API instead of raw API.
+ * Makes SNMP agent run in a worker thread, so blocking operations
+ * can be done in MIB calls.
+ */
+#if !defined SNMP_USE_NETCONN || defined __DOXYGEN__
+#define SNMP_USE_NETCONN           0
+#endif
+
+/**
+ * SNMP_USE_RAW: Use raw API.
+ * SNMP agent does not run in a worker thread, so blocking operations
+ * should not be done in MIB calls.
+ */
+#if !defined SNMP_USE_RAW || defined __DOXYGEN__
+#define SNMP_USE_RAW               1
+#endif
+
+#if SNMP_USE_NETCONN && SNMP_USE_RAW
+#error SNMP stack can use only one of the APIs {raw, netconn}
+#endif
+
+#if LWIP_SNMP && !SNMP_USE_NETCONN && !SNMP_USE_RAW
+#error SNMP stack needs a receive API and UDP {raw, netconn}
+#endif
+
+#if SNMP_USE_NETCONN
+/**
+ * SNMP_STACK_SIZE: Stack size of SNMP netconn worker thread
+ */
+#if !defined SNMP_STACK_SIZE || defined __DOXYGEN__
+#define SNMP_STACK_SIZE            DEFAULT_THREAD_STACKSIZE
+#endif
+
+/**
+ * SNMP_THREAD_PRIO: SNMP netconn worker thread priority
+ */
+#if !defined SNMP_THREAD_PRIO || defined __DOXYGEN__
+#define SNMP_THREAD_PRIO           DEFAULT_THREAD_PRIO
+#endif
+#endif /* SNMP_USE_NETCONN */
+
+/**
+ * SNMP_TRAP_DESTINATIONS: Number of trap destinations. At least one trap
+ * destination is required
+ */
+#if !defined SNMP_TRAP_DESTINATIONS || defined __DOXYGEN__
+#define SNMP_TRAP_DESTINATIONS          1
+#endif
+
+/**
+ * Only allow SNMP write actions that are 'safe' (e.g. disabling netifs is not
+ * a safe action and disabled when SNMP_SAFE_REQUESTS = 1).
+ * Unsafe requests are disabled by default!
+ */
+#if !defined SNMP_SAFE_REQUESTS || defined __DOXYGEN__
+#define SNMP_SAFE_REQUESTS              1
+#endif
+
+/**
+ * The maximum length of strings used.
+ */
+#if !defined SNMP_MAX_OCTET_STRING_LEN || defined __DOXYGEN__
+#define SNMP_MAX_OCTET_STRING_LEN       127
+#endif
+
+/**
+ * The maximum number of Sub ID's inside an object identifier.
+ * Indirectly this also limits the maximum depth of SNMP tree.
+ */
+#if !defined SNMP_MAX_OBJ_ID_LEN || defined __DOXYGEN__
+#define SNMP_MAX_OBJ_ID_LEN             50
+#endif
+
+#if !defined SNMP_MAX_VALUE_SIZE || defined __DOXYGEN__
+/**
+ * The minimum size of a value.
+ */
+#define SNMP_MIN_VALUE_SIZE             (2 * sizeof(u32_t*)) /* size required to store the basic types (8 bytes for counter64) */
+/**
+ * The maximum size of a value.
+ */
+#define SNMP_MAX_VALUE_SIZE             LWIP_MAX(LWIP_MAX((SNMP_MAX_OCTET_STRING_LEN), sizeof(u32_t)*(SNMP_MAX_OBJ_ID_LEN)), SNMP_MIN_VALUE_SIZE)
+#endif
+
+/**
+ * The snmp read-access community. Used for write-access and traps, too
+ * unless SNMP_COMMUNITY_WRITE or SNMP_COMMUNITY_TRAP are enabled, respectively.
+ */
+#if !defined SNMP_COMMUNITY || defined __DOXYGEN__
+#define SNMP_COMMUNITY                  "public"
+#endif
+
+/**
+ * The snmp write-access community.
+ * Set this community to "" in order to disallow any write access.
+ */
+#if !defined SNMP_COMMUNITY_WRITE || defined __DOXYGEN__
+#define SNMP_COMMUNITY_WRITE            "private"
+#endif
+
+/**
+ * The snmp community used for sending traps.
+ */
+#if !defined SNMP_COMMUNITY_TRAP || defined __DOXYGEN__
+#define SNMP_COMMUNITY_TRAP             "public"
+#endif
+
+/**
+ * The maximum length of community string.
+ * If community names shall be adjusted at runtime via snmp_set_community() calls,
+ * enter here the possible maximum length (+1 for terminating null character).
+ */
+#if !defined SNMP_MAX_COMMUNITY_STR_LEN || defined __DOXYGEN__
+#define SNMP_MAX_COMMUNITY_STR_LEN LWIP_MAX(LWIP_MAX(sizeof(SNMP_COMMUNITY), sizeof(SNMP_COMMUNITY_WRITE)), sizeof(SNMP_COMMUNITY_TRAP))
+#endif
+
+/**
+ * The OID identifiying the device. This may be the enterprise OID itself or any OID located below it in tree.
+ */
+#if !defined SNMP_DEVICE_ENTERPRISE_OID || defined __DOXYGEN__
+#define SNMP_LWIP_ENTERPRISE_OID 26381
+/**
+ * IANA assigned enterprise ID for lwIP is 26381
+ * @see http://www.iana.org/assignments/enterprise-numbers
+ *
+ * @note this enterprise ID is assigned to the lwIP project,
+ * all object identifiers living under this ID are assigned
+ * by the lwIP maintainers!
+ * @note don't change this define, use snmp_set_device_enterprise_oid()
+ *
+ * If you need to create your own private MIB you'll need
+ * to apply for your own enterprise ID with IANA:
+ * http://www.iana.org/numbers.html
+ */
+#define SNMP_DEVICE_ENTERPRISE_OID {1, 3, 6, 1, 4, 1, SNMP_LWIP_ENTERPRISE_OID}
+/**
+ * Length of SNMP_DEVICE_ENTERPRISE_OID
+ */
+#define SNMP_DEVICE_ENTERPRISE_OID_LEN 7
+#endif
+
+/**
+ * SNMP_DEBUG: Enable debugging for SNMP messages.
+ */
+#if !defined SNMP_DEBUG || defined __DOXYGEN__
+#define SNMP_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs.
+ */
+#if !defined SNMP_MIB_DEBUG || defined __DOXYGEN__
+#define SNMP_MIB_DEBUG                  LWIP_DBG_OFF
+#endif
+
+/**
+ * Indicates if the MIB2 implementation of LWIP SNMP stack is used.
+ */
+#if !defined SNMP_LWIP_MIB2 || defined __DOXYGEN__
+#define SNMP_LWIP_MIB2                      LWIP_SNMP
+#endif
+
+/**
+ * Value return for sysDesc field of MIB2.
+ */
+#if !defined SNMP_LWIP_MIB2_SYSDESC || defined __DOXYGEN__
+#define SNMP_LWIP_MIB2_SYSDESC              "lwIP"
+#endif
+
+/**
+ * Value return for sysName field of MIB2.
+ * To make sysName field settable, call snmp_mib2_set_sysname() to provide the necessary buffers.
+ */
+#if !defined SNMP_LWIP_MIB2_SYSNAME || defined __DOXYGEN__
+#define SNMP_LWIP_MIB2_SYSNAME              "FQDN-unk"
+#endif
+
+/**
+ * Value return for sysContact field of MIB2.
+ * To make sysContact field settable, call snmp_mib2_set_syscontact() to provide the necessary buffers.
+ */
+#if !defined SNMP_LWIP_MIB2_SYSCONTACT || defined __DOXYGEN__
+#define SNMP_LWIP_MIB2_SYSCONTACT           ""
+#endif
+
+/**
+ * Value return for sysLocation field of MIB2.
+ * To make sysLocation field settable, call snmp_mib2_set_syslocation() to provide the necessary buffers.
+ */
+#if !defined SNMP_LWIP_MIB2_SYSLOCATION || defined __DOXYGEN__
+#define SNMP_LWIP_MIB2_SYSLOCATION          ""
+#endif
+
+/**
+ * This value is used to limit the repetitions processed in GetBulk requests (value == 0 means no limitation).
+ * This may be useful to limit the load for a single request.
+ * According to SNMP RFC 1905 it is allowed to not return all requested variables from a GetBulk request if system load would be too high.
+ * so the effect is that the client will do more requests to gather all data.
+ * For the stack this could be useful in case that SNMP processing is done in TCP/IP thread. In this situation a request with many
+ * repetitions could block the thread for a longer time. Setting limit here will keep the stack more responsive.
+ */
+#if !defined SNMP_LWIP_GETBULK_MAX_REPETITIONS || defined __DOXYGEN__
+#define SNMP_LWIP_GETBULK_MAX_REPETITIONS 0
+#endif
+
+/**
+ * @}
+ */
+
+/*
+   ------------------------------------
+   ---------- SNMPv3 options ----------
+   ------------------------------------
+*/
+
+/**
+ * LWIP_SNMP_V3==1: This enables EXPERIMENTAL SNMPv3 support. LWIP_SNMP must
+ * also be enabled.
+ * THIS IS UNDER DEVELOPMENT AND SHOULD NOT BE ENABLED IN PRODUCTS.
+ */
+#ifndef LWIP_SNMP_V3
+#define LWIP_SNMP_V3               0
+#endif
+
+#ifndef LWIP_SNMP_V3_MBEDTLS
+#define LWIP_SNMP_V3_MBEDTLS       LWIP_SNMP_V3
+#endif
+
+#ifndef LWIP_SNMP_V3_CRYPTO
+#define LWIP_SNMP_V3_CRYPTO        LWIP_SNMP_V3_MBEDTLS
+#endif
+
+#ifndef LWIP_SNMP_CONFIGURE_VERSIONS
+#define LWIP_SNMP_CONFIGURE_VERSIONS 0
+#endif
+
+#endif /* LWIP_HDR_SNMP_OPTS_H */

src/lwip/include/lwip/apps/snmp_scalar.h

@@ -0,0 +1,113 @@
+/**
+ * @file
+ * SNMP server MIB API to implement scalar nodes
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Martin Hentschel <info@cl-soft.de>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_SNMP_SCALAR_H
+#define LWIP_HDR_APPS_SNMP_SCALAR_H
+
+#include "lwip/apps/snmp_opts.h"
+#include "lwip/apps/snmp_core.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+/** basic scalar node */
+struct snmp_scalar_node
+{
+  /** inherited "base class" members */
+  struct snmp_leaf_node node;
+  u8_t asn1_type;
+  snmp_access_t access;
+  node_instance_get_value_method get_value;
+  node_instance_set_test_method set_test;
+  node_instance_set_value_method set_value;
+};
+
+
+snmp_err_t snmp_scalar_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+snmp_err_t snmp_scalar_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+
+#define SNMP_SCALAR_CREATE_NODE(oid, access, asn1_type, get_value_method, set_test_method, set_value_method) \
+  {{{ SNMP_NODE_SCALAR, (oid) }, \
+    snmp_scalar_get_instance, \
+    snmp_scalar_get_next_instance }, \
+    (asn1_type), (access), (get_value_method), (set_test_method), (set_value_method) }
+
+#define SNMP_SCALAR_CREATE_NODE_READONLY(oid, asn1_type, get_value_method) SNMP_SCALAR_CREATE_NODE(oid, SNMP_NODE_INSTANCE_READ_ONLY, asn1_type, get_value_method, NULL, NULL)
+
+/** scalar array node - a tree node which contains scalars only as children */
+struct snmp_scalar_array_node_def
+{
+  u32_t         oid;
+  u8_t          asn1_type;
+  snmp_access_t access;
+};
+
+typedef s16_t (*snmp_scalar_array_get_value_method)(const struct snmp_scalar_array_node_def*, void*);
+typedef snmp_err_t (*snmp_scalar_array_set_test_method)(const struct snmp_scalar_array_node_def*, u16_t, void*);
+typedef snmp_err_t (*snmp_scalar_array_set_value_method)(const struct snmp_scalar_array_node_def*, u16_t, void*);
+
+/** basic scalar array node */
+struct snmp_scalar_array_node
+{
+  /** inherited "base class" members */
+  struct snmp_leaf_node node;
+  u16_t array_node_count;
+  const struct snmp_scalar_array_node_def* array_nodes;
+  snmp_scalar_array_get_value_method get_value;
+  snmp_scalar_array_set_test_method set_test;
+  snmp_scalar_array_set_value_method set_value;
+};
+
+snmp_err_t snmp_scalar_array_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+snmp_err_t snmp_scalar_array_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+
+#define SNMP_SCALAR_CREATE_ARRAY_NODE(oid, array_nodes, get_value_method, set_test_method, set_value_method) \
+  {{{ SNMP_NODE_SCALAR_ARRAY, (oid) }, \
+    snmp_scalar_array_get_instance, \
+    snmp_scalar_array_get_next_instance }, \
+    (u16_t)LWIP_ARRAYSIZE(array_nodes), (array_nodes), (get_value_method), (set_test_method), (set_value_method) }
+
+#endif /* LWIP_SNMP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SNMP_SCALAR_H */

src/lwip/include/lwip/apps/snmp_snmpv2_framework.h

@@ -0,0 +1,32 @@
+/*
+Generated by LwipMibCompiler
+*/
+
+#ifndef LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H
+#define LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H
+
+#include "lwip/apps/snmp_opts.h"
+#if LWIP_SNMP
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "lwip/apps/snmp_core.h"
+
+extern const struct snmp_obj_id usmNoAuthProtocol;
+extern const struct snmp_obj_id usmHMACMD5AuthProtocol;
+extern const struct snmp_obj_id usmHMACSHAAuthProtocol;
+
+extern const struct snmp_obj_id usmNoPrivProtocol;
+extern const struct snmp_obj_id usmDESPrivProtocol;
+extern const struct snmp_obj_id usmAESPrivProtocol;
+
+extern const struct snmp_mib snmpframeworkmib;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LWIP_SNMP */
+#endif /* LWIP_HDR_APPS_SNMP_FRAMEWORK_MIB_H */

src/lwip/include/lwip/apps/snmp_snmpv2_usm.h

@@ -0,0 +1,24 @@
+/*
+Generated by LwipMibCompiler
+*/
+
+#ifndef LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H
+#define LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H
+
+#include "lwip/apps/snmp_opts.h"
+#if LWIP_SNMP
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "lwip/apps/snmp_core.h"
+
+extern const struct snmp_mib snmpusmmib;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LWIP_SNMP */
+#endif /* LWIP_HDR_APPS_SNMP_USER_BASED_SM_MIB_H */

src/lwip/include/lwip/apps/snmp_table.h

@@ -0,0 +1,134 @@
+/**
+ * @file
+ * SNMP server MIB API to implement table nodes
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Martin Hentschel <info@cl-soft.de>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_SNMP_TABLE_H
+#define LWIP_HDR_APPS_SNMP_TABLE_H
+
+#include "lwip/apps/snmp_opts.h"
+#include "lwip/apps/snmp_core.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+/** default (customizable) read/write table */
+struct snmp_table_col_def
+{
+  u32_t index;
+  u8_t asn1_type;
+  snmp_access_t access;
+};
+
+/** table node */
+struct snmp_table_node
+{
+  /** inherited "base class" members */
+  struct snmp_leaf_node node;
+  u16_t column_count;
+  const struct snmp_table_col_def* columns;
+  snmp_err_t (*get_cell_instance)(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, struct snmp_node_instance* cell_instance);
+  snmp_err_t (*get_next_cell_instance)(const u32_t* column, struct snmp_obj_id* row_oid, struct snmp_node_instance* cell_instance);
+  /** returns object value for the given object identifier */
+  node_instance_get_value_method get_value;
+  /** tests length and/or range BEFORE setting */
+  node_instance_set_test_method set_test;
+  /** sets object value, only called when set_test() was successful */
+  node_instance_set_value_method set_value;
+};
+
+snmp_err_t snmp_table_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+snmp_err_t snmp_table_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+
+#define SNMP_TABLE_CREATE(oid, columns, get_cell_instance_method, get_next_cell_instance_method, get_value_method, set_test_method, set_value_method) \
+  {{{ SNMP_NODE_TABLE, (oid) }, \
+  snmp_table_get_instance, \
+  snmp_table_get_next_instance }, \
+  (u16_t)LWIP_ARRAYSIZE(columns), (columns), \
+  (get_cell_instance_method), (get_next_cell_instance_method), \
+  (get_value_method), (set_test_method), (set_value_method)}
+
+#define SNMP_TABLE_GET_COLUMN_FROM_OID(oid) ((oid)[1]) /* first array value is (fixed) row entry (fixed to 1) and 2nd value is column, follow3ed by instance */
+
+
+/** simple read-only table */
+typedef enum {
+  SNMP_VARIANT_VALUE_TYPE_U32,
+  SNMP_VARIANT_VALUE_TYPE_S32,
+  SNMP_VARIANT_VALUE_TYPE_PTR,
+  SNMP_VARIANT_VALUE_TYPE_CONST_PTR
+} snmp_table_column_data_type_t;
+
+struct snmp_table_simple_col_def
+{
+  u32_t index;
+  u8_t asn1_type;
+  snmp_table_column_data_type_t data_type; /* depending of what union member is used to store the value*/
+};
+
+/** simple read-only table node */
+struct snmp_table_simple_node
+{
+  /* inherited "base class" members */
+  struct snmp_leaf_node node;
+  u16_t column_count;
+  const struct snmp_table_simple_col_def* columns;
+  snmp_err_t (*get_cell_value)(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len);
+  snmp_err_t (*get_next_cell_instance_and_value)(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len);
+};
+
+snmp_err_t snmp_table_simple_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+snmp_err_t snmp_table_simple_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+
+#define SNMP_TABLE_CREATE_SIMPLE(oid, columns, get_cell_value_method, get_next_cell_instance_and_value_method) \
+  {{{ SNMP_NODE_TABLE, (oid) }, \
+  snmp_table_simple_get_instance, \
+  snmp_table_simple_get_next_instance }, \
+  (u16_t)LWIP_ARRAYSIZE(columns), (columns), (get_cell_value_method), (get_next_cell_instance_and_value_method) }
+
+s16_t snmp_table_extract_value_from_s32ref(struct snmp_node_instance* instance, void* value);
+s16_t snmp_table_extract_value_from_u32ref(struct snmp_node_instance* instance, void* value);
+s16_t snmp_table_extract_value_from_refconstptr(struct snmp_node_instance* instance, void* value);
+
+#endif /* LWIP_SNMP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SNMP_TABLE_H */

src/lwip/include/lwip/apps/snmp_threadsync.h

@@ -0,0 +1,114 @@
+/**
+ * @file
+ * SNMP server MIB API to implement thread synchronization
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Dirk Ziegelmeier <dziegel@gmx.de>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_SNMP_THREADSYNC_H
+#define LWIP_HDR_APPS_SNMP_THREADSYNC_H
+
+#include "lwip/apps/snmp_opts.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/apps/snmp_core.h"
+#include "lwip/sys.h"
+
+typedef void (*snmp_threadsync_called_fn)(void* arg);
+typedef void (*snmp_threadsync_synchronizer_fn)(snmp_threadsync_called_fn fn, void* arg);
+
+
+/** Thread sync runtime data. For internal usage only. */
+struct threadsync_data
+{
+  union {
+    snmp_err_t err;
+    s16_t s16;
+  } retval;
+  union {
+    const u32_t *root_oid;
+    void *value;
+  } arg1;
+  union {
+    u8_t root_oid_len;
+    u16_t len;
+  } arg2;
+  const struct snmp_threadsync_node *threadsync_node;
+  struct snmp_node_instance proxy_instance;
+};
+
+/** Thread sync instance. Needed EXACTLY once for every thread to be synced into. */
+struct snmp_threadsync_instance
+{
+  sys_sem_t                       sem;
+  sys_mutex_t                     sem_usage_mutex;
+  snmp_threadsync_synchronizer_fn sync_fn;
+  struct threadsync_data          data;
+};
+
+/** SNMP thread sync proxy leaf node */
+struct snmp_threadsync_node
+{
+  /* inherited "base class" members */
+  struct snmp_leaf_node           node;
+
+  const struct snmp_leaf_node     *target;
+  struct snmp_threadsync_instance *instance;
+};
+
+snmp_err_t snmp_threadsync_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+snmp_err_t snmp_threadsync_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance);
+
+/** Create thread sync proxy node */
+#define SNMP_CREATE_THREAD_SYNC_NODE(oid, target_leaf_node, threadsync_instance) \
+  {{{ SNMP_NODE_THREADSYNC, (oid) }, \
+    snmp_threadsync_get_instance, \
+    snmp_threadsync_get_next_instance }, \
+    (target_leaf_node), \
+    (threadsync_instance) }
+
+/** Create thread sync instance data */
+void snmp_threadsync_init(struct snmp_threadsync_instance *instance, snmp_threadsync_synchronizer_fn sync_fn);
+
+#endif /* LWIP_SNMP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SNMP_THREADSYNC_H */

src/lwip/include/lwip/apps/snmpv3.h

@@ -0,0 +1,114 @@
+/**
+ * @file
+ * Additional SNMPv3 functionality RFC3414 and RFC3826.
+ */
+
+/*
+ * Copyright (c) 2016 Elias Oenal.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Elias Oenal <lwip@eliasoenal.com>
+ */
+
+#ifndef LWIP_HDR_APPS_SNMP_V3_H
+#define LWIP_HDR_APPS_SNMP_V3_H
+
+#include "lwip/apps/snmp_opts.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_SNMP && LWIP_SNMP_V3
+
+typedef enum
+{
+  SNMP_V3_AUTH_ALGO_INVAL = 0,
+  SNMP_V3_AUTH_ALGO_MD5   = 1,
+  SNMP_V3_AUTH_ALGO_SHA   = 2
+} snmpv3_auth_algo_t;
+
+typedef enum
+{
+  SNMP_V3_PRIV_ALGO_INVAL = 0,
+  SNMP_V3_PRIV_ALGO_DES   = 1,
+  SNMP_V3_PRIV_ALGO_AES   = 2
+} snmpv3_priv_algo_t;
+
+typedef enum
+{
+  SNMP_V3_USER_STORAGETYPE_OTHER       = 1,
+  SNMP_V3_USER_STORAGETYPE_VOLATILE    = 2,
+  SNMP_V3_USER_STORAGETYPE_NONVOLATILE = 3,
+  SNMP_V3_USER_STORAGETYPE_PERMANENT   = 4,
+  SNMP_V3_USER_STORAGETYPE_READONLY    = 5
+} snmpv3_user_storagetype_t;
+
+/*
+ * The following callback functions must be implemented by the application.
+ * There is a dummy implementation in snmpv3_dummy.c.
+ */
+
+void snmpv3_get_engine_id(const char **id, u8_t *len);
+err_t snmpv3_set_engine_id(const char* id, u8_t len);
+
+u32_t snmpv3_get_engine_boots(void);
+void snmpv3_set_engine_boots(u32_t boots);
+
+u32_t snmpv3_get_engine_time(void);
+void snmpv3_reset_engine_time(void);
+
+err_t snmpv3_get_user(const char* username, snmpv3_auth_algo_t *auth_algo, u8_t *auth_key, snmpv3_priv_algo_t *priv_algo, u8_t *priv_key);
+u8_t snmpv3_get_amount_of_users(void);
+err_t snmpv3_get_user_storagetype(const char *username, snmpv3_user_storagetype_t *storagetype);
+err_t snmpv3_get_username(char *username, u8_t index);
+
+/* The following functions are provided by the SNMPv3 agent */
+
+void snmpv3_engine_id_changed(void);
+s32_t snmpv3_get_engine_time_internal(void);
+
+void snmpv3_password_to_key_md5(
+    const u8_t *password,     /* IN */
+    size_t      passwordlen,  /* IN */
+    const u8_t *engineID,     /* IN  - pointer to snmpEngineID  */
+    u8_t        engineLength, /* IN  - length of snmpEngineID */
+    u8_t       *key);         /* OUT - pointer to caller 16-octet buffer */
+
+void snmpv3_password_to_key_sha(
+    const u8_t *password,     /* IN */
+    size_t      passwordlen,  /* IN */
+    const u8_t *engineID,     /* IN  - pointer to snmpEngineID  */
+    u8_t        engineLength, /* IN  - length of snmpEngineID */
+    u8_t       *key);         /* OUT - pointer to caller 20-octet buffer */
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SNMP_V3_H */

src/lwip/include/lwip/apps/sntp.h

@@ -0,0 +1,81 @@
+/**
+ * @file
+ * SNTP client API
+ */
+
+/*
+ * Copyright (c) 2007-2009 Frédéric Bernon, Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Frédéric Bernon, Simon Goldschmidt
+ *
+ */
+#ifndef LWIP_HDR_APPS_SNTP_H
+#define LWIP_HDR_APPS_SNTP_H
+
+#include "lwip/apps/sntp_opts.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* SNTP operating modes: default is to poll using unicast.
+   The mode has to be set before calling sntp_init(). */
+#define SNTP_OPMODE_POLL            0
+#define SNTP_OPMODE_LISTENONLY      1
+void sntp_setoperatingmode(u8_t operating_mode);
+u8_t sntp_getoperatingmode(void);
+
+void sntp_init(void);
+void sntp_stop(void);
+u8_t sntp_enabled(void);
+
+void sntp_setserver(u8_t idx, const ip_addr_t *addr);
+const ip_addr_t* sntp_getserver(u8_t idx);
+u8_t sntp_getkodreceived(u8_t idx);
+
+#if SNTP_MONITOR_SERVER_REACHABILITY
+u8_t sntp_getreachability(u8_t idx);
+#endif /* SNTP_MONITOR_SERVER_REACHABILITY */
+
+#if SNTP_SERVER_DNS
+void sntp_setservername(u8_t idx, const char *server);
+const char *sntp_getservername(u8_t idx);
+#endif /* SNTP_SERVER_DNS */
+
+#if SNTP_GET_SERVERS_FROM_DHCP || SNTP_GET_SERVERS_FROM_DHCPV6
+void sntp_servermode_dhcp(int set_servers_from_dhcp);
+#else /* SNTP_GET_SERVERS_FROM_DHCP || SNTP_GET_SERVERS_FROM_DHCPV6 */
+#define sntp_servermode_dhcp(x)
+#endif /* SNTP_GET_SERVERS_FROM_DHCP || SNTP_GET_SERVERS_FROM_DHCPV6 */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_SNTP_H */

src/lwip/include/lwip/apps/sntp_opts.h

@@ -0,0 +1,215 @@
+/**
+ * @file
+ * SNTP client options list
+ */
+
+/*
+ * Copyright (c) 2007-2009 Frédéric Bernon, Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Frédéric Bernon, Simon Goldschmidt
+ *
+ */
+#ifndef LWIP_HDR_APPS_SNTP_OPTS_H
+#define LWIP_HDR_APPS_SNTP_OPTS_H
+
+#include "lwip/opt.h"
+#include "lwip/prot/iana.h"
+
+/**
+ * @defgroup sntp_opts Options
+ * @ingroup sntp
+ * @{
+ */
+
+/** SNTP macro to change system time in seconds
+ * Define SNTP_SET_SYSTEM_TIME_US(sec, us) to set the time in microseconds
+ * instead of this one if you need the additional precision. Alternatively,
+ * define SNTP_SET_SYSTEM_TIME_NTP(sec, frac) in order to work with native
+ * NTP timestamps instead.
+ */
+#if !defined SNTP_SET_SYSTEM_TIME || defined __DOXYGEN__
+#define SNTP_SET_SYSTEM_TIME(sec)   LWIP_UNUSED_ARG(sec)
+#endif
+
+/** The maximum number of SNTP servers that can be set */
+#if !defined SNTP_MAX_SERVERS || defined __DOXYGEN__
+#define SNTP_MAX_SERVERS           LWIP_DHCP_MAX_NTP_SERVERS
+#endif
+
+/** Set this to 1 to implement the callback function called by dhcp when
+ * NTP servers are received. */
+#if !defined SNTP_GET_SERVERS_FROM_DHCP || defined __DOXYGEN__
+#define SNTP_GET_SERVERS_FROM_DHCP LWIP_DHCP_GET_NTP_SRV
+#endif
+
+/** Set this to 1 to implement the callback function called by dhcpv6 when
+ * NTP servers are received. */
+#if !defined SNTP_GET_SERVERS_FROM_DHCPV6 || defined __DOXYGEN__
+#define SNTP_GET_SERVERS_FROM_DHCPV6 LWIP_DHCP6_GET_NTP_SRV
+#endif
+
+/** Set this to 1 to support DNS names (or IP address strings) to set sntp servers
+ * One server address/name can be defined as default if SNTP_SERVER_DNS == 1:
+ * \#define SNTP_SERVER_ADDRESS "pool.ntp.org"
+ */
+#if !defined SNTP_SERVER_DNS || defined __DOXYGEN__
+#define SNTP_SERVER_DNS            0
+#endif
+
+/**
+ * SNTP_DEBUG: Enable debugging for SNTP.
+ */
+#if !defined SNTP_DEBUG || defined __DOXYGEN__
+#define SNTP_DEBUG                  LWIP_DBG_OFF
+#endif
+
+/** SNTP server port */
+#if !defined SNTP_PORT || defined __DOXYGEN__
+#define SNTP_PORT                   LWIP_IANA_PORT_SNTP
+#endif
+
+/** Sanity check:
+ * Define this to
+ * - 0 to turn off sanity checks (default; smaller code)
+ * - >= 1 to check address and port of the response packet to ensure the
+ *        response comes from the server we sent the request to.
+ * - >= 2 to check returned Originate Timestamp against Transmit Timestamp
+ *        sent to the server (to ensure response to older request).
+ * - >= 3 @todo: discard reply if any of the VN, Stratum, or Transmit Timestamp
+ *        fields is 0 or the Mode field is not 4 (unicast) or 5 (broadcast).
+ * - >= 4 @todo: to check that the Root Delay and Root Dispersion fields are each
+ *        greater than or equal to 0 and less than infinity, where infinity is
+ *        currently a cozy number like one second. This check avoids using a
+ *        server whose synchronization source has expired for a very long time.
+ */
+#if !defined SNTP_CHECK_RESPONSE || defined __DOXYGEN__
+#define SNTP_CHECK_RESPONSE         0
+#endif
+
+/** Enable round-trip delay compensation.
+ * Compensate for the round-trip delay by calculating the clock offset from
+ * the originate, receive, transmit and destination timestamps, as per RFC.
+ *
+ * The calculation requires compiler support for 64-bit integers. Also, either
+ * SNTP_SET_SYSTEM_TIME_US or SNTP_SET_SYSTEM_TIME_NTP has to be implemented
+ * for setting the system clock with sub-second precision. Likewise, either
+ * SNTP_GET_SYSTEM_TIME or SNTP_GET_SYSTEM_TIME_NTP needs to be implemented
+ * with sub-second precision.
+ *
+ * Although not strictly required, it makes sense to combine this option with
+ * SNTP_CHECK_RESPONSE >= 2 for sanity-checking of the received timestamps.
+ * Also, in order for the round-trip calculation to work, the difference
+ * between the local clock and the NTP server clock must not be larger than
+ * about 34 years. If that limit is exceeded, the implementation will fall back
+ * to setting the clock without compensation. In order to ensure that the local
+ * clock is always within the permitted range for compensation, even at first
+ * try, it may be necessary to store at least the current year in non-volatile
+ * memory.
+ */
+#if !defined SNTP_COMP_ROUNDTRIP || defined __DOXYGEN__
+#define SNTP_COMP_ROUNDTRIP         0
+#endif
+
+/** According to the RFC, this shall be a random delay
+ * between 1 and 5 minutes (in milliseconds) to prevent load peaks.
+ * This can be defined to a random generation function,
+ * which must return the delay in milliseconds as u32_t.
+ * Turned off by default.
+ */
+#if !defined SNTP_STARTUP_DELAY || defined __DOXYGEN__
+#ifdef LWIP_RAND
+#define SNTP_STARTUP_DELAY          1
+#else
+#define SNTP_STARTUP_DELAY          0
+#endif
+#endif
+
+/** If you want the startup delay to be a function, define this
+ * to a function (including the brackets) and define SNTP_STARTUP_DELAY to 1.
+ */
+#if !defined SNTP_STARTUP_DELAY_FUNC || defined __DOXYGEN__
+#define SNTP_STARTUP_DELAY_FUNC     (LWIP_RAND() % 5000)
+#endif
+
+/** SNTP receive timeout - in milliseconds
+ * Also used as retry timeout - this shouldn't be too low.
+ * Default is 15 seconds. Must not be beolw 15 seconds by specification (i.e. 15000)
+ */
+#if !defined SNTP_RECV_TIMEOUT || defined __DOXYGEN__
+#define SNTP_RECV_TIMEOUT           15000
+#endif
+
+/** SNTP update delay - in milliseconds
+ * Default is 1 hour. Must not be beolw 60 seconds by specification (i.e. 60000)
+ */
+#if !defined SNTP_UPDATE_DELAY || defined __DOXYGEN__
+#define SNTP_UPDATE_DELAY           3600000
+#endif
+
+/** SNTP macro to get system time, used with SNTP_CHECK_RESPONSE >= 2
+ * to send in request and compare in response. Also used for round-trip
+ * delay compensation if SNTP_COMP_ROUNDTRIP != 0.
+ * Alternatively, define SNTP_GET_SYSTEM_TIME_NTP(sec, frac) in order to
+ * work with native NTP timestamps instead.
+ */
+#if !defined SNTP_GET_SYSTEM_TIME || defined __DOXYGEN__
+#define SNTP_GET_SYSTEM_TIME(sec, us)     do { (sec) = 0; (us) = 0; } while(0)
+#endif
+
+/** Default retry timeout (in milliseconds) if the response
+ * received is invalid.
+ * This is doubled with each retry until SNTP_RETRY_TIMEOUT_MAX is reached.
+ */
+#if !defined SNTP_RETRY_TIMEOUT || defined __DOXYGEN__
+#define SNTP_RETRY_TIMEOUT          SNTP_RECV_TIMEOUT
+#endif
+
+/** Maximum retry timeout (in milliseconds). */
+#if !defined SNTP_RETRY_TIMEOUT_MAX || defined __DOXYGEN__
+#define SNTP_RETRY_TIMEOUT_MAX      (SNTP_RETRY_TIMEOUT * 10)
+#endif
+
+/** Increase retry timeout with every retry sent
+ * Default is on to conform to RFC.
+ */
+#if !defined SNTP_RETRY_TIMEOUT_EXP || defined __DOXYGEN__
+#define SNTP_RETRY_TIMEOUT_EXP      1
+#endif
+
+/** Keep a reachability shift register per server
+ * Default is on to conform to RFC.
+ */
+#if !defined SNTP_MONITOR_SERVER_REACHABILITY || defined __DOXYGEN__
+#define SNTP_MONITOR_SERVER_REACHABILITY 1
+#endif
+
+/**
+ * @}
+ */
+
+#endif /* LWIP_HDR_APPS_SNTP_OPTS_H */

src/lwip/include/lwip/apps/tftp_client.h

@@ -0,0 +1,50 @@
+/**
+ *
+ * @file tftp_client.h
+ * TFTP client header
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification,are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_TFTP_CLIENT_H
+#define LWIP_HDR_APPS_TFTP_CLIENT_H
+
+#include "lwip/apps/tftp_common.h"
+
+enum tftp_transfer_mode {
+  TFTP_MODE_OCTET,
+  TFTP_MODE_NETASCII,
+  TFTP_MODE_BINARY /* used in old versions only */
+};
+
+err_t tftp_init_client(const struct tftp_context* ctx);
+err_t tftp_get(void* handle, const ip_addr_t *addr, u16_t port, const char* fname, enum tftp_transfer_mode mode);
+err_t tftp_put(void* handle, const ip_addr_t *addr, u16_t port, const char* fname, enum tftp_transfer_mode mode);
+
+#endif /* LWIP_HDR_APPS_TFTP_CLIENT_H */

src/lwip/include/lwip/apps/tftp_common.h

@@ -0,0 +1,108 @@
+/**
+ *
+ * @file tftp_common.h
+ *
+ * @author   Logan Gunthorpe <logang@deltatee.com>
+ *
+ * @brief    Trivial File Transfer Protocol (RFC 1350)
+ *
+ * Copyright (c) Deltatee Enterprises Ltd. 2013
+ * All rights reserved.
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification,are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Logan Gunthorpe <logang@deltatee.com>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_TFTP_COMMON_H
+#define LWIP_HDR_APPS_TFTP_COMMON_H
+
+#include "lwip/apps/tftp_opts.h"
+#include "lwip/err.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @ingroup tftp
+ * TFTP context containing callback functions for TFTP transfers
+ */
+struct tftp_context {
+  /**
+   * Open file for read/write (server mode only).
+   * @param fname Filename
+   * @param mode Mode string from TFTP RFC 1350 (netascii, octet, mail)
+   * @param write Flag indicating read (0) or write (!= 0) access
+   * @returns File handle supplied to other functions
+   */
+  void* (*open)(const char* fname, const char* mode, u8_t write);
+  /**
+   * Close file handle
+   * @param handle File handle returned by open()/tftp_put()/tftp_get()
+   */
+  void (*close)(void* handle);
+  /**
+   * Read from file
+   * @param handle File handle returned by open()/tftp_put()/tftp_get()
+   * @param buf Target buffer to copy read data to
+   * @param bytes Number of bytes to copy to buf
+   * @returns &gt;= 0: Success; &lt; 0: Error
+   */
+  int (*read)(void* handle, void* buf, int bytes);
+  /**
+   * Write to file
+   * @param handle File handle returned by open()/tftp_put()/tftp_get()
+   * @param pbuf PBUF adjusted such that payload pointer points
+   *             to the beginning of write data. In other words,
+   *             TFTP headers are stripped off.
+   * @returns &gt;= 0: Success; &lt; 0: Error
+   */
+  int (*write)(void* handle, struct pbuf* p);
+  /**
+   * Error indication from client or response from server
+   * @param handle File handle set by open()/tftp_get()/tftp_put()
+   * @param err error code from client or server
+   * @param msg error message from client or server
+   * @param size size of msg
+   */
+  void (*error)(void* handle, int err, const char* msg, int size);
+};
+
+#define LWIP_TFTP_MODE_SERVER       0x01
+#define LWIP_TFTP_MODE_CLIENT       0x02
+#define LWIP_TFTP_MODE_CLIENTSERVER (LWIP_TFTP_MODE_SERVER | LWIP_TFTP_MODE_CLIENT)
+
+err_t tftp_init_common(u8_t mode, const struct tftp_context* ctx);
+void tftp_cleanup(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_APPS_TFTP_COMMON_H */

src/lwip/include/lwip/apps/tftp_opts.h

@@ -0,0 +1,106 @@
+/**
+ *
+ * @file tftp_opts.h
+ *
+ * @author   Logan Gunthorpe <logang@deltatee.com>
+ *
+ * @brief    Trivial File Transfer Protocol (RFC 1350) implementation options
+ *
+ * Copyright (c) Deltatee Enterprises Ltd. 2013
+ * All rights reserved.
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification,are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Logan Gunthorpe <logang@deltatee.com>
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_TFTP_OPTS_H
+#define LWIP_HDR_APPS_TFTP_OPTS_H
+
+#include "lwip/opt.h"
+#include "lwip/prot/iana.h"
+
+/**
+ * @defgroup tftp_opts Options
+ * @ingroup tftp
+ * @{
+ */
+
+/**
+ * Enable TFTP debug messages
+ */
+#if !defined TFTP_DEBUG || defined __DOXYGEN__
+#define TFTP_DEBUG            LWIP_DBG_OFF
+#endif
+
+/**
+ * TFTP server port
+ */
+#if !defined TFTP_PORT || defined __DOXYGEN__
+#define TFTP_PORT             LWIP_IANA_PORT_TFTP
+#endif
+
+/**
+ * TFTP timeout
+ */
+#if !defined TFTP_TIMEOUT_MSECS || defined __DOXYGEN__
+#define TFTP_TIMEOUT_MSECS    10000
+#endif
+
+/**
+ * Max. number of retries when a file is read from server
+ */
+#if !defined TFTP_MAX_RETRIES || defined __DOXYGEN__
+#define TFTP_MAX_RETRIES      5
+#endif
+
+/**
+ * TFTP timer cyclic interval
+ */
+#if !defined TFTP_TIMER_MSECS || defined __DOXYGEN__
+#define TFTP_TIMER_MSECS      (TFTP_TIMEOUT_MSECS / 10)
+#endif
+
+/**
+ * Max. length of TFTP filename
+ */
+#if !defined TFTP_MAX_FILENAME_LEN || defined __DOXYGEN__
+#define TFTP_MAX_FILENAME_LEN 20
+#endif
+
+/**
+ * Max. length of TFTP mode
+ */
+#if !defined TFTP_MAX_MODE_LEN || defined __DOXYGEN__
+#define TFTP_MAX_MODE_LEN     10
+#endif
+
+/**
+ * @}
+ */
+
+#endif /* LWIP_HDR_APPS_TFTP_OPTS_H */

src/lwip/include/lwip/apps/tftp_server.h

@@ -0,0 +1,42 @@
+/**
+ *
+ * @file tftp_server.h
+ * TFTP server header
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification,are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+
+#ifndef LWIP_HDR_APPS_TFTP_SERVER_H
+#define LWIP_HDR_APPS_TFTP_SERVER_H
+
+#include "lwip/apps/tftp_common.h"
+
+err_t tftp_init_server(const struct tftp_context* ctx);
+
+#endif /* LWIP_HDR_APPS_TFTP_SERVER_H */

src/lwip/include/lwip/arch.h

@@ -0,0 +1,402 @@
+/**
+ * @file
+ * Support for different processor and compiler architectures
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_ARCH_H
+#define LWIP_HDR_ARCH_H
+
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN 1234
+#endif
+
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN 4321
+#endif
+
+#include "arch/cc.h"
+
+/**
+ * @defgroup compiler_abstraction Compiler/platform abstraction
+ * @ingroup sys_layer
+ * All defines related to this section must not be placed in lwipopts.h,
+ * but in arch/cc.h!
+ * If the compiler does not provide memset() this file must include a
+ * definition of it, or include a file which defines it.
+ * These options cannot be \#defined in lwipopts.h since they are not options
+ * of lwIP itself, but options of the lwIP port to your system.
+ * @{
+ */
+
+/** Define the byte order of the system.
+ * Needed for conversion of network data to host byte order.
+ * Allowed values: LITTLE_ENDIAN and BIG_ENDIAN
+ */
+#ifndef BYTE_ORDER
+#define BYTE_ORDER LITTLE_ENDIAN
+#endif
+
+/** Define random number generator function of your system */
+#ifdef __DOXYGEN__
+#define LWIP_RAND() ((u32_t)rand())
+#endif
+
+/** Platform specific diagnostic output.<br>
+ * Note the default implementation pulls in printf, which may
+ * in turn pull in a lot of standard library code. In resource-constrained
+ * systems, this should be defined to something less resource-consuming.
+ */
+#ifndef LWIP_PLATFORM_DIAG
+#define LWIP_PLATFORM_DIAG(x) do {printf x;} while(0)
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+
+/** Platform specific assertion handling.<br>
+ * Note the default implementation pulls in printf, fflush and abort, which may
+ * in turn pull in a lot of standard library code. In resource-constrained
+ * systems, this should be defined to something less resource-consuming.
+ */
+#ifndef LWIP_PLATFORM_ASSERT
+#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion \"%s\" failed at line %d in %s\n", \
+                                     x, __LINE__, __FILE__); fflush(NULL); abort();} while(0)
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+
+/** Define this to 1 in arch/cc.h of your port if you do not want to
+ * include stddef.h header to get size_t. You need to typedef size_t
+ * by yourself in this case.
+ */
+#ifndef LWIP_NO_STDDEF_H
+#define LWIP_NO_STDDEF_H 0
+#endif
+
+#if !LWIP_NO_STDDEF_H
+#include <stddef.h> /* for size_t */
+#endif
+
+/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
+ * the stdint.h header. You need to typedef the generic types listed in
+ * lwip/arch.h yourself in this case (u8_t, u16_t...).
+ */
+#ifndef LWIP_NO_STDINT_H
+#define LWIP_NO_STDINT_H 0
+#endif
+
+/* Define generic types used in lwIP */
+#if !LWIP_NO_STDINT_H
+#include <stdint.h>
+/* stdint.h is C99 which should also provide support for 64-bit integers */
+#if !defined(LWIP_HAVE_INT64) && defined(UINT64_MAX)
+#define LWIP_HAVE_INT64 1
+#endif
+typedef uint8_t   u8_t;
+typedef int8_t    s8_t;
+typedef uint16_t  u16_t;
+typedef int16_t   s16_t;
+typedef uint32_t  u32_t;
+typedef int32_t   s32_t;
+#if LWIP_HAVE_INT64
+typedef uint64_t  u64_t;
+typedef int64_t   s64_t;
+#endif
+typedef uintptr_t mem_ptr_t;
+#endif
+
+/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
+ * the inttypes.h header. You need to define the format strings listed in
+ * lwip/arch.h yourself in this case (X8_F, U16_F...).
+ */
+#ifndef LWIP_NO_INTTYPES_H
+#define LWIP_NO_INTTYPES_H 0
+#endif
+
+/* Define (sn)printf formatters for these lwIP types */
+#if !LWIP_NO_INTTYPES_H
+#include <inttypes.h>
+#ifndef X8_F
+#define X8_F  "02" PRIx8
+#endif
+#ifndef U16_F
+#define U16_F PRIu16
+#endif
+#ifndef S16_F
+#define S16_F PRId16
+#endif
+#ifndef X16_F
+#define X16_F PRIx16
+#endif
+#ifndef U32_F
+#define U32_F PRIu32
+#endif
+#ifndef S32_F
+#define S32_F PRId32
+#endif
+#ifndef X32_F
+#define X32_F PRIx32
+#endif
+#ifndef SZT_F
+#define SZT_F PRIuPTR
+#endif
+#endif
+
+/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
+ * the limits.h header. You need to define the type limits yourself in this case
+ * (e.g. INT_MAX, SSIZE_MAX).
+ */
+#ifndef LWIP_NO_LIMITS_H
+#define LWIP_NO_LIMITS_H 0
+#endif
+
+/* Include limits.h? */
+#if !LWIP_NO_LIMITS_H
+#include <limits.h>
+#endif
+
+/* Do we need to define ssize_t? This is a compatibility hack:
+ * Unfortunately, this type seems to be unavailable on some systems (even if
+ * sys/types or unistd.h are available).
+ * Being like that, we define it to 'int' if SSIZE_MAX is not defined.
+ */
+#ifdef SSIZE_MAX
+/* If SSIZE_MAX is defined, unistd.h should provide the type as well */
+#ifndef LWIP_NO_UNISTD_H
+#define LWIP_NO_UNISTD_H 0
+#endif
+#if !LWIP_NO_UNISTD_H
+#include <unistd.h>
+#endif
+#else /* SSIZE_MAX */
+typedef int ssize_t;
+#define SSIZE_MAX INT_MAX
+#endif /* SSIZE_MAX */
+
+/* some maximum values needed in lwip code */
+#define LWIP_UINT32_MAX 0xffffffff
+
+/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
+ * the ctype.h header. If ctype.h is available, a few character functions
+ * are mapped to the appropriate functions (lwip_islower, lwip_isdigit...), if
+ * not, a private implementation is provided.
+ */
+#ifndef LWIP_NO_CTYPE_H
+#define LWIP_NO_CTYPE_H 0
+#endif
+
+#if LWIP_NO_CTYPE_H
+#define lwip_in_range(c, lo, up)  ((u8_t)(c) >= (lo) && (u8_t)(c) <= (up))
+#define lwip_isdigit(c)           lwip_in_range((c), '0', '9')
+#define lwip_isxdigit(c)          (lwip_isdigit(c) || lwip_in_range((c), 'a', 'f') || lwip_in_range((c), 'A', 'F'))
+#define lwip_islower(c)           lwip_in_range((c), 'a', 'z')
+#define lwip_isspace(c)           ((c) == ' ' || (c) == '\f' || (c) == '\n' || (c) == '\r' || (c) == '\t' || (c) == '\v')
+#define lwip_isupper(c)           lwip_in_range((c), 'A', 'Z')
+#define lwip_tolower(c)           (lwip_isupper(c) ? (c) - 'A' + 'a' : c)
+#define lwip_toupper(c)           (lwip_islower(c) ? (c) - 'a' + 'A' : c)
+#else
+#include <ctype.h>
+#define lwip_isdigit(c)           isdigit((unsigned char)(c))
+#define lwip_isxdigit(c)          isxdigit((unsigned char)(c))
+#define lwip_islower(c)           islower((unsigned char)(c))
+#define lwip_isspace(c)           isspace((unsigned char)(c))
+#define lwip_isupper(c)           isupper((unsigned char)(c))
+#define lwip_tolower(c)           tolower((unsigned char)(c))
+#define lwip_toupper(c)           toupper((unsigned char)(c))
+#endif
+
+/** C++ const_cast<target_type>(val) equivalent to remove constness from a value (GCC -Wcast-qual) */
+#ifndef LWIP_CONST_CAST
+#define LWIP_CONST_CAST(target_type, val) ((target_type)((ptrdiff_t)val))
+#endif
+
+/** Get rid of alignment cast warnings (GCC -Wcast-align) */
+#ifndef LWIP_ALIGNMENT_CAST
+#define LWIP_ALIGNMENT_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
+#endif
+
+/** Get rid of warnings related to pointer-to-numeric and vice-versa casts,
+ * e.g. "conversion from 'u8_t' to 'void *' of greater size"
+ */
+#ifndef LWIP_PTR_NUMERIC_CAST
+#define LWIP_PTR_NUMERIC_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
+#endif
+
+/** Avoid warnings/errors related to implicitly casting away packed attributes by doing a explicit cast */
+#ifndef LWIP_PACKED_CAST
+#define LWIP_PACKED_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
+#endif
+
+/** Allocates a memory buffer of specified size that is of sufficient size to align
+ * its start address using LWIP_MEM_ALIGN.
+ * You can declare your own version here e.g. to enforce alignment without adding
+ * trailing padding bytes (see LWIP_MEM_ALIGN_BUFFER) or your own section placement
+ * requirements.<br>
+ * e.g. if you use gcc and need 32 bit alignment:<br>
+ * \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[size] \_\_attribute\_\_((aligned(4)))<br>
+ * or more portable:<br>
+ * \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u32_t variable_name[(size + sizeof(u32_t) - 1) / sizeof(u32_t)]
+ */
+#ifndef LWIP_DECLARE_MEMORY_ALIGNED
+#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[LWIP_MEM_ALIGN_BUFFER(size)]
+#endif
+
+/** Calculate memory size for an aligned buffer - returns the next highest
+ * multiple of MEM_ALIGNMENT (e.g. LWIP_MEM_ALIGN_SIZE(3) and
+ * LWIP_MEM_ALIGN_SIZE(4) will both yield 4 for MEM_ALIGNMENT == 4).
+ */
+#ifndef LWIP_MEM_ALIGN_SIZE
+#define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1U) & ~(MEM_ALIGNMENT-1U))
+#endif
+
+/** Calculate safe memory size for an aligned buffer when using an unaligned
+ * type as storage. This includes a safety-margin on (MEM_ALIGNMENT - 1) at the
+ * start (e.g. if buffer is u8_t[] and actual data will be u32_t*)
+ */
+#ifndef LWIP_MEM_ALIGN_BUFFER
+#define LWIP_MEM_ALIGN_BUFFER(size) (((size) + MEM_ALIGNMENT - 1U))
+#endif
+
+/** Align a memory pointer to the alignment defined by MEM_ALIGNMENT
+ * so that ADDR % MEM_ALIGNMENT == 0
+ */
+#ifndef LWIP_MEM_ALIGN
+#define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Packed structs support.
+  * Placed BEFORE declaration of a packed struct.<br>
+  * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br>
+  * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
+  */
+#ifndef PACK_STRUCT_BEGIN
+#define PACK_STRUCT_BEGIN
+#endif /* PACK_STRUCT_BEGIN */
+
+/** Packed structs support.
+  * Placed AFTER declaration of a packed struct.<br>
+  * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br>
+  * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
+  */
+#ifndef PACK_STRUCT_END
+#define PACK_STRUCT_END
+#endif /* PACK_STRUCT_END */
+
+/** Packed structs support.
+  * Placed between end of declaration of a packed struct and trailing semicolon.<br>
+  * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br>
+  * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
+  */
+#ifndef PACK_STRUCT_STRUCT
+#if defined(__GNUC__) || defined(__clang__)
+#define PACK_STRUCT_STRUCT __attribute__((packed))
+#else
+#define PACK_STRUCT_STRUCT
+#endif
+#endif /* PACK_STRUCT_STRUCT */
+
+/** Packed structs support.
+  * Wraps u32_t and u16_t members.<br>
+  * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br>
+  * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
+  */
+#ifndef PACK_STRUCT_FIELD
+#define PACK_STRUCT_FIELD(x) x
+#endif /* PACK_STRUCT_FIELD */
+
+/** Packed structs support.
+  * Wraps u8_t members, where some compilers warn that packing is not necessary.<br>
+  * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br>
+  * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
+  */
+#ifndef PACK_STRUCT_FLD_8
+#define PACK_STRUCT_FLD_8(x) PACK_STRUCT_FIELD(x)
+#endif /* PACK_STRUCT_FLD_8 */
+
+/** Packed structs support.
+  * Wraps members that are packed structs themselves, where some compilers warn that packing is not necessary.<br>
+  * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br>
+  * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
+  */
+#ifndef PACK_STRUCT_FLD_S
+#define PACK_STRUCT_FLD_S(x) PACK_STRUCT_FIELD(x)
+#endif /* PACK_STRUCT_FLD_S */
+
+/** PACK_STRUCT_USE_INCLUDES==1: Packed structs support using \#include files before and after struct to be packed.<br>
+ * The file included BEFORE the struct is "arch/bpstruct.h".<br>
+ * The file included AFTER the struct is "arch/epstruct.h".<br>
+ * This can be used to implement struct packing on MS Visual C compilers, see
+ * the Win32 port in the lwIP/contrib subdir for reference.
+ * For examples of packed struct declarations, see include/lwip/prot/ subfolder.<br>
+ * A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
+ */
+#ifdef __DOXYGEN__
+#define PACK_STRUCT_USE_INCLUDES
+#endif
+
+/** Eliminates compiler warning about unused arguments (GCC -Wextra -Wunused). */
+#ifndef LWIP_UNUSED_ARG
+#define LWIP_UNUSED_ARG(x) (void)x
+#endif /* LWIP_UNUSED_ARG */
+
+/** LWIP_PROVIDE_ERRNO==1: Let lwIP provide ERRNO values and the 'errno' variable.
+ * If this is disabled, cc.h must either define 'errno', include <errno.h>,
+ * define LWIP_ERRNO_STDINCLUDE to get <errno.h> included or
+ * define LWIP_ERRNO_INCLUDE to <errno.h> or equivalent.
+ */
+#if defined __DOXYGEN__
+#define LWIP_PROVIDE_ERRNO
+#endif
+
+/* Use a special, reproducable version of rand() for fuzz tests? */
+#ifdef LWIP_RAND_FOR_FUZZ
+#ifdef LWIP_RAND
+#undef LWIP_RAND
+#endif
+u32_t lwip_fuzz_rand(void);
+#define LWIP_RAND() lwip_fuzz_rand()
+#endif
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_ARCH_H */

src/lwip/include/lwip/autoip.h

@@ -0,0 +1,90 @@
+/**
+ * @file
+ *
+ * AutoIP Automatic LinkLocal IP Configuration
+ */
+
+/*
+ *
+ * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Dominik Spies <kontakt@dspies.de>
+ *
+ * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
+ * with RFC 3927.
+ *
+ */
+
+#ifndef LWIP_HDR_AUTOIP_H
+#define LWIP_HDR_AUTOIP_H
+
+#include "lwip/opt.h"
+
+#if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netif.h"
+/* #include "lwip/udp.h" */
+#include "lwip/etharp.h"
+#include "lwip/acd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** AutoIP state information per netif */
+struct autoip
+{
+  /** the currently selected, probed, announced or used LL IP-Address */
+  ip4_addr_t llipaddr;
+  /** current AutoIP state machine state */
+  u8_t state;
+  /** total number of probed/used Link Local IP-Addresses */
+  u8_t tried_llipaddr;
+  /** acd struct */
+  struct acd acd;
+};
+
+
+void autoip_set_struct(struct netif *netif, struct autoip *autoip);
+void autoip_remove_struct(struct netif *netif);
+err_t autoip_start(struct netif *netif);
+err_t autoip_stop(struct netif *netif);
+void autoip_network_changed_link_up(struct netif *netif);
+void autoip_network_changed_link_down(struct netif *netif);
+u8_t autoip_supplied_address(struct netif *netif);
+
+/* for lwIP internal use by ip4.c */
+u8_t autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr);
+
+#define netif_autoip_data(netif) ((struct autoip*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV4 && LWIP_AUTOIP */
+
+#endif /* LWIP_HDR_AUTOIP_H */

src/lwip/include/lwip/debug.h

@@ -0,0 +1,161 @@
+/**
+ * @file
+ * Debug messages infrastructure
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_DEBUG_H
+#define LWIP_HDR_DEBUG_H
+
+#include "lwip/arch.h"
+#include "lwip/opt.h"
+
+/**
+ * @defgroup debugging_levels LWIP_DBG_MIN_LEVEL and LWIP_DBG_TYPES_ON values
+ * @ingroup lwip_opts_debugmsg
+ * @{
+ */
+
+/** @name Debug level (LWIP_DBG_MIN_LEVEL)
+ * @{
+ */
+/** Debug level: ALL messages*/
+#define LWIP_DBG_LEVEL_ALL     0x00
+/** Debug level: Warnings. bad checksums, dropped packets, ... */
+#define LWIP_DBG_LEVEL_WARNING 0x01
+/** Debug level: Serious. memory allocation failures, ... */
+#define LWIP_DBG_LEVEL_SERIOUS 0x02
+/** Debug level: Severe */
+#define LWIP_DBG_LEVEL_SEVERE  0x03
+/**
+ * @}
+ */
+
+#define LWIP_DBG_MASK_LEVEL    0x03
+/* compatibility define only */
+#define LWIP_DBG_LEVEL_OFF     LWIP_DBG_LEVEL_ALL
+
+/** @name Enable/disable debug messages completely (LWIP_DBG_TYPES_ON)
+ * @{
+ */
+/** flag for LWIP_DEBUGF to enable that debug message */
+#define LWIP_DBG_ON            0x80U
+/** flag for LWIP_DEBUGF to disable that debug message */
+#define LWIP_DBG_OFF           0x00U
+/**
+ * @}
+ */
+
+/** @name Debug message types (LWIP_DBG_TYPES_ON)
+ * @{
+ */
+/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */
+#define LWIP_DBG_TRACE         0x40U
+/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */
+#define LWIP_DBG_STATE         0x20U
+/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */
+#define LWIP_DBG_FRESH         0x10U
+/** flag for LWIP_DEBUGF to halt after printing this debug message */
+#define LWIP_DBG_HALT          0x08U
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lwip_assertions Assertion handling
+ * @ingroup lwip_opts_debug
+ * @{
+ */
+/**
+ * LWIP_NOASSERT: Disable LWIP_ASSERT checks:
+ * To disable assertions define LWIP_NOASSERT in arch/cc.h.
+ */
+#ifdef __DOXYGEN__
+#define LWIP_NOASSERT
+#undef LWIP_NOASSERT
+#endif
+/**
+ * @}
+ */
+
+#ifndef LWIP_NOASSERT
+#define LWIP_ASSERT(message, assertion) do { if (!(assertion)) { \
+  LWIP_PLATFORM_ASSERT(message); }} while(0)
+#else  /* LWIP_NOASSERT */
+#define LWIP_ASSERT(message, assertion)
+#endif /* LWIP_NOASSERT */
+
+#ifndef LWIP_ERROR
+#ifdef LWIP_DEBUG
+#define LWIP_PLATFORM_ERROR(message) LWIP_PLATFORM_DIAG((message))
+#else
+#define LWIP_PLATFORM_ERROR(message)
+#endif
+
+/* if "expression" isn't true, then print "message" and execute "handler" expression */
+#define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \
+  LWIP_PLATFORM_ERROR(message); handler;}} while(0)
+#endif /* LWIP_ERROR */
+
+/** Enable debug message printing, but only if debug message type is enabled
+ *  AND is of correct type AND is at least LWIP_DBG_LEVEL.
+ */
+#ifdef __DOXYGEN__
+#define LWIP_DEBUG
+#undef LWIP_DEBUG
+#endif
+
+#ifdef LWIP_DEBUG
+#define LWIP_DEBUG_ENABLED(debug) (((debug) & LWIP_DBG_ON) && \
+                                   ((debug) & LWIP_DBG_TYPES_ON) && \
+                                   ((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >= LWIP_DBG_MIN_LEVEL))
+
+#define LWIP_DEBUGF(debug, message) do { \
+                               if (LWIP_DEBUG_ENABLED(debug)) { \
+                                 LWIP_PLATFORM_DIAG(message); \
+                                 if ((debug) & LWIP_DBG_HALT) { \
+                                   ASSERT_HALT; while(1); \
+                                 } \
+                               } \
+                             } while(0)
+
+#else  /* LWIP_DEBUG */
+#define LWIP_DEBUG_ENABLED(debug) 0
+#define LWIP_DEBUGF(debug, message)
+#endif /* LWIP_DEBUG */
+
+#endif /* LWIP_HDR_DEBUG_H */

src/lwip/include/lwip/def.h

@@ -0,0 +1,156 @@
+/**
+ * @file
+ * various utility macros
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/**
+ * @defgroup perf Performance measurement
+ * @ingroup sys_layer
+ * All defines related to this section must not be placed in lwipopts.h,
+ * but in arch/perf.h!
+ * Measurement calls made throughout lwip, these can be defined to nothing.
+ * - PERF_START: start measuring something.
+ * - PERF_STOP(x): stop measuring something, and record the result.
+ */
+
+#ifndef LWIP_HDR_DEF_H
+#define LWIP_HDR_DEF_H
+
+/* arch.h might define NULL already */
+#include "lwip/arch.h"
+#include "lwip/opt.h"
+#if LWIP_PERF
+#include "arch/perf.h"
+#else /* LWIP_PERF */
+#define PERF_START    /* null definition */
+#define PERF_STOP(x)  /* null definition */
+#endif /* LWIP_PERF */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LWIP_MAX(x , y)  (((x) > (y)) ? (x) : (y))
+#define LWIP_MIN(x , y)  (((x) < (y)) ? (x) : (y))
+
+/* Get the number of entries in an array ('x' must NOT be a pointer!) */
+#define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0]))
+
+/** Create u32_t value from bytes */
+#define LWIP_MAKEU32(a,b,c,d) (((u32_t)((a) & 0xff) << 24) | \
+                               ((u32_t)((b) & 0xff) << 16) | \
+                               ((u32_t)((c) & 0xff) << 8)  | \
+                                (u32_t)((d) & 0xff))
+
+#ifndef NULL
+#ifdef __cplusplus
+#define NULL 0
+#else
+#define NULL ((void *)0)
+#endif
+#endif
+
+#if BYTE_ORDER == BIG_ENDIAN
+#define lwip_htons(x) ((u16_t)(x))
+#define lwip_ntohs(x) ((u16_t)(x))
+#define lwip_htonl(x) ((u32_t)(x))
+#define lwip_ntohl(x) ((u32_t)(x))
+#define PP_HTONS(x)   ((u16_t)(x))
+#define PP_NTOHS(x)   ((u16_t)(x))
+#define PP_HTONL(x)   ((u32_t)(x))
+#define PP_NTOHL(x)   ((u32_t)(x))
+#else /* BYTE_ORDER != BIG_ENDIAN */
+#ifndef lwip_htons
+u16_t lwip_htons(u16_t x);
+#endif
+#define lwip_ntohs(x) lwip_htons(x)
+
+#ifndef lwip_htonl
+u32_t lwip_htonl(u32_t x);
+#endif
+#define lwip_ntohl(x) lwip_htonl(x)
+
+/* These macros should be calculated by the preprocessor and are used
+   with compile-time constants only (so that there is no little-endian
+   overhead at runtime). */
+#define PP_HTONS(x) ((u16_t)((((x) & (u16_t)0x00ffU) << 8) | (((x) & (u16_t)0xff00U) >> 8)))
+#define PP_NTOHS(x) PP_HTONS(x)
+#define PP_HTONL(x) ((((x) & (u32_t)0x000000ffUL) << 24) | \
+                     (((x) & (u32_t)0x0000ff00UL) <<  8) | \
+                     (((x) & (u32_t)0x00ff0000UL) >>  8) | \
+                     (((x) & (u32_t)0xff000000UL) >> 24))
+#define PP_NTOHL(x) PP_HTONL(x)
+#endif /* BYTE_ORDER == BIG_ENDIAN */
+
+/* Provide usual function names as macros for users, but this can be turned off */
+#ifndef LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS
+#define htons(x) lwip_htons(x)
+#define ntohs(x) lwip_ntohs(x)
+#define htonl(x) lwip_htonl(x)
+#define ntohl(x) lwip_ntohl(x)
+#endif
+
+/* Functions that are not available as standard implementations.
+ * In cc.h, you can #define these to implementations available on
+ * your platform to save some code bytes if you use these functions
+ * in your application, too.
+ */
+
+#ifndef lwip_itoa
+/* This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform */
+void  lwip_itoa(char* result, size_t bufsize, int number);
+#endif
+#ifndef lwip_strnicmp
+/* This can be #defined to strnicmp() or strncasecmp() depending on your platform */
+int   lwip_strnicmp(const char* str1, const char* str2, size_t len);
+#endif
+#ifndef lwip_stricmp
+/* This can be #defined to stricmp() or strcasecmp() depending on your platform */
+int   lwip_stricmp(const char* str1, const char* str2);
+#endif
+#ifndef lwip_strnstr
+/* This can be #defined to strnstr() depending on your platform */
+char* lwip_strnstr(const char* buffer, const char* token, size_t n);
+#endif
+#ifndef lwip_strnistr
+/* This can be #defined to strnistr() depending on your platform */
+char* lwip_strnistr(const char* buffer, const char* token, size_t n);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_DEF_H */

src/lwip/include/lwip/dhcp.h

@@ -0,0 +1,155 @@
+/**
+ * @file
+ * DHCP client API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Leon Woestenberg <leon.woestenberg@gmx.net>
+ *
+ */
+#ifndef LWIP_HDR_DHCP_H
+#define LWIP_HDR_DHCP_H
+
+#include "lwip/opt.h"
+
+#if LWIP_DHCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netif.h"
+#include "lwip/udp.h"
+
+#if LWIP_DHCP_DOES_ACD_CHECK
+#include "lwip/acd.h"
+#endif /* LWIP_DHCP_DOES_ACD_CHECK */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Define DHCP_TIMEOUT_SIZE_T in opt.h if you want use a different integer than u16_t.
+ *  Especially useful if DHCP_COARSE_TIMER_SECS is in smaller units, so timeouts easily reach UINT16_MAX and more */
+#ifdef DHCP_TIMEOUT_SIZE_T
+typedef DHCP_TIMEOUT_SIZE_T dhcp_timeout_t;
+#else /* DHCP_TIMEOUT_SIZE_T */
+typedef u16_t dhcp_timeout_t;
+#endif /* DHCP_TIMEOUT_SIZE_T*/
+/** period (in seconds) of the application calling dhcp_coarse_tmr() */
+#ifndef DHCP_COARSE_TIMER_SECS
+#define DHCP_COARSE_TIMER_SECS  60
+#endif /* DHCP_COARSE_TIMER_SECS */
+/** period (in milliseconds) of the application calling dhcp_coarse_tmr() */
+#define DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS * 1000UL)
+/** period (in milliseconds) of the application calling dhcp_fine_tmr() */
+#define DHCP_FINE_TIMER_MSECS   500
+
+#define DHCP_BOOT_FILE_LEN      128U
+
+#define DHCP_FLAG_SUBNET_MASK_GIVEN 0x01
+#define DHCP_FLAG_EXTERNAL_MEM      0x02
+
+/* AutoIP cooperation flags (struct dhcp.autoip_coop_state) */
+typedef enum {
+  DHCP_AUTOIP_COOP_STATE_OFF  = 0,
+  DHCP_AUTOIP_COOP_STATE_ON   = 1
+} dhcp_autoip_coop_state_enum_t;
+
+struct dhcp
+{
+  /** transaction identifier of last sent request */
+  u32_t xid;
+  /** track PCB allocation state */
+  u8_t pcb_allocated;
+  /** current DHCP state machine state */
+  u8_t state;
+  /** retries of current request */
+  u8_t tries;
+  /** see DHCP_FLAG_* */
+  u8_t flags;
+
+  dhcp_timeout_t request_timeout; /* #ticks with period DHCP_FINE_TIMER_SECS for request timeout */
+  dhcp_timeout_t t1_timeout;  /* #ticks with period DHCP_COARSE_TIMER_SECS for renewal time */
+  dhcp_timeout_t t2_timeout;  /* #ticks with period DHCP_COARSE_TIMER_SECS for rebind time */
+  dhcp_timeout_t t1_renew_time;  /* #ticks with period DHCP_COARSE_TIMER_SECS until next renew try */
+  dhcp_timeout_t t2_rebind_time; /* #ticks with period DHCP_COARSE_TIMER_SECS until next rebind try */
+  dhcp_timeout_t lease_used; /* #ticks with period DHCP_COARSE_TIMER_SECS since last received DHCP ack */
+  dhcp_timeout_t t0_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for lease time */
+  ip_addr_t server_ip_addr; /* dhcp server address that offered this lease (ip_addr_t because passed to UDP) */
+  ip4_addr_t offered_ip_addr;
+  ip4_addr_t offered_sn_mask;
+  ip4_addr_t offered_gw_addr;
+
+  u32_t offered_t0_lease; /* lease period (in seconds) */
+  u32_t offered_t1_renew; /* recommended renew time (usually 50% of lease period) */
+  u32_t offered_t2_rebind; /* recommended rebind time (usually 87.5 of lease period)  */
+#if LWIP_DHCP_BOOTP_FILE
+  ip4_addr_t offered_si_addr;
+  char boot_file_name[DHCP_BOOT_FILE_LEN];
+#endif /* LWIP_DHCP_BOOTPFILE */
+#if LWIP_DHCP_DOES_ACD_CHECK
+  /** acd struct */
+  struct acd acd;
+#endif /* LWIP_DHCP_DOES_ACD_CHECK */
+};
+
+
+void dhcp_set_struct(struct netif *netif, struct dhcp *dhcp);
+/** Remove a struct dhcp previously set to the netif using dhcp_set_struct() */
+#define dhcp_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, NULL)
+void dhcp_cleanup(struct netif *netif);
+err_t dhcp_start(struct netif *netif);
+err_t dhcp_renew(struct netif *netif);
+err_t dhcp_release(struct netif *netif);
+void dhcp_stop(struct netif *netif);
+void dhcp_release_and_stop(struct netif *netif);
+void dhcp_inform(struct netif *netif);
+void dhcp_network_changed_link_up(struct netif *netif);
+
+u8_t dhcp_supplied_address(const struct netif *netif);
+/* to be called every minute */
+void dhcp_coarse_tmr(void);
+/* to be called every half second */
+void dhcp_fine_tmr(void);
+
+#if LWIP_DHCP_GET_NTP_SRV
+/** This function must exist, in other to add offered NTP servers to
+ * the NTP (or SNTP) engine.
+ * See LWIP_DHCP_MAX_NTP_SERVERS */
+extern void dhcp_set_ntp_servers(u8_t num_ntp_servers, const ip4_addr_t* ntp_server_addrs);
+#endif /* LWIP_DHCP_GET_NTP_SRV */
+
+#define netif_dhcp_data(netif) ((struct dhcp*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_DHCP */
+
+#endif /*LWIP_HDR_DHCP_H*/

src/lwip/include/lwip/dhcp6.h

@@ -0,0 +1,104 @@
+/**
+ * @file
+ *
+ * DHCPv6 client: IPv6 address autoconfiguration as per
+ * RFC 3315 (stateful DHCPv6) and
+ * RFC 3736 (stateless DHCPv6).
+ */
+
+/*
+ * Copyright (c) 2018 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ */
+
+#ifndef LWIP_HDR_IP6_DHCP6_H
+#define LWIP_HDR_IP6_DHCP6_H
+
+#include "lwip/opt.h"
+
+#if LWIP_IPV6_DHCP6  /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/err.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** period (in milliseconds) of the application calling dhcp6_tmr() */
+#define DHCP6_TIMER_MSECS   500
+
+struct dhcp6
+{
+  /** transaction identifier of last sent request */
+  u32_t xid;
+  /** track PCB allocation state */
+  u8_t pcb_allocated;
+  /** current DHCPv6 state machine state */
+  u8_t state;
+  /** retries of current request */
+  u8_t tries;
+  /** if request config is triggered while another action is active, this keeps track of it */
+  u8_t request_config_pending;
+  /** #ticks with period DHCP6_TIMER_MSECS for request timeout */
+  u16_t request_timeout;
+#if LWIP_IPV6_DHCP6_STATEFUL
+  /* @todo: add more members here to keep track of stateful DHCPv6 data, like lease times */
+#endif /* LWIP_IPV6_DHCP6_STATEFUL */
+};
+
+void dhcp6_set_struct(struct netif *netif, struct dhcp6 *dhcp6);
+/** Remove a struct dhcp6 previously set to the netif using dhcp6_set_struct() */
+#define dhcp6_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL)
+void dhcp6_cleanup(struct netif *netif);
+
+err_t dhcp6_enable_stateful(struct netif *netif);
+err_t dhcp6_enable_stateless(struct netif *netif);
+void dhcp6_disable(struct netif *netif);
+
+void dhcp6_tmr(void);
+
+void dhcp6_nd6_ra_trigger(struct netif *netif, u8_t managed_addr_config, u8_t other_config);
+
+#if LWIP_DHCP6_GET_NTP_SRV
+/** This function must exist, in other to add offered NTP servers to
+ * the NTP (or SNTP) engine.
+ * See LWIP_DHCP6_MAX_NTP_SERVERS */
+extern void dhcp6_set_ntp_servers(u8_t num_ntp_servers, const ip_addr_t* ntp_server_addrs);
+#endif /* LWIP_DHCP6_GET_NTP_SRV */
+
+#define netif_dhcp6_data(netif) ((struct dhcp6*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV6_DHCP6 */
+
+#endif /* LWIP_HDR_IP6_DHCP6_H */

src/lwip/include/lwip/dns.h

@@ -0,0 +1,131 @@
+/**
+ * @file
+ * DNS API
+ */
+
+/**
+ * lwip DNS resolver header file.
+
+ * Author: Jim Pettinato
+ *   April 2007
+
+ * ported from uIP resolv.c Copyright (c) 2002-2003, Adam Dunkels.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LWIP_HDR_DNS_H
+#define LWIP_HDR_DNS_H
+
+#include "lwip/opt.h"
+
+#if LWIP_DNS
+
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** DNS timer period */
+#define DNS_TMR_INTERVAL          1000
+
+/* DNS resolve types: */
+#define LWIP_DNS_ADDRTYPE_IPV4      0
+#define LWIP_DNS_ADDRTYPE_IPV6      1
+#define LWIP_DNS_ADDRTYPE_IPV4_IPV6 2 /* try to resolve IPv4 first, try IPv6 if IPv4 fails only */
+#define LWIP_DNS_ADDRTYPE_IPV6_IPV4 3 /* try to resolve IPv6 first, try IPv4 if IPv6 fails only */
+#if LWIP_IPV4 && LWIP_IPV6
+#ifndef LWIP_DNS_ADDRTYPE_DEFAULT
+#define LWIP_DNS_ADDRTYPE_DEFAULT   LWIP_DNS_ADDRTYPE_IPV4_IPV6
+#endif
+#elif LWIP_IPV4
+#define LWIP_DNS_ADDRTYPE_DEFAULT   LWIP_DNS_ADDRTYPE_IPV4
+#else
+#define LWIP_DNS_ADDRTYPE_DEFAULT   LWIP_DNS_ADDRTYPE_IPV6
+#endif
+
+#if DNS_LOCAL_HOSTLIST
+/** struct used for local host-list */
+struct local_hostlist_entry {
+  /** static hostname */
+  const char *name;
+  /** static host address in network byteorder */
+  ip_addr_t addr;
+  struct local_hostlist_entry *next;
+};
+#define DNS_LOCAL_HOSTLIST_ELEM(name, addr_init) {name, addr_init, NULL}
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+#ifndef DNS_LOCAL_HOSTLIST_MAX_NAMELEN
+#define DNS_LOCAL_HOSTLIST_MAX_NAMELEN  DNS_MAX_NAME_LENGTH
+#endif
+#define LOCALHOSTLIST_ELEM_SIZE ((sizeof(struct local_hostlist_entry) + DNS_LOCAL_HOSTLIST_MAX_NAMELEN + 1))
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+#endif /* DNS_LOCAL_HOSTLIST */
+
+#if LWIP_IPV4
+extern const ip_addr_t dns_mquery_v4group;
+#endif /* LWIP_IPV4 */
+#if LWIP_IPV6
+extern const ip_addr_t dns_mquery_v6group;
+#endif /* LWIP_IPV6 */
+
+/** Callback which is invoked when a hostname is found.
+ * A function of this type must be implemented by the application using the DNS resolver.
+ * @param name pointer to the name that was looked up.
+ * @param ipaddr pointer to an ip_addr_t containing the IP address of the hostname,
+ *        or NULL if the name could not be found (or on any other error).
+ * @param callback_arg a user-specified callback argument passed to dns_gethostbyname
+*/
+typedef void (*dns_found_callback)(const char *name, const ip_addr_t *ipaddr, void *callback_arg);
+
+void             dns_init(void);
+void             dns_tmr(void);
+void             dns_setserver(u8_t numdns, const ip_addr_t *dnsserver);
+const ip_addr_t* dns_getserver(u8_t numdns);
+err_t            dns_gethostbyname(const char *hostname, ip_addr_t *addr,
+                                   dns_found_callback found, void *callback_arg);
+err_t            dns_gethostbyname_addrtype(const char *hostname, ip_addr_t *addr,
+                                   dns_found_callback found, void *callback_arg,
+                                   u8_t dns_addrtype);
+
+
+#if DNS_LOCAL_HOSTLIST
+size_t         dns_local_iterate(dns_found_callback iterator_fn, void *iterator_arg);
+err_t          dns_local_lookup(const char *hostname, ip_addr_t *addr, u8_t dns_addrtype);
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+int            dns_local_removehost(const char *hostname, const ip_addr_t *addr);
+err_t          dns_local_addhost(const char *hostname, const ip_addr_t *addr);
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+#endif /* DNS_LOCAL_HOSTLIST */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_DNS */
+
+#endif /* LWIP_HDR_DNS_H */

src/lwip/include/lwip/err.h

@@ -0,0 +1,117 @@
+/**
+ * @file
+ * lwIP Error codes
+ */
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_ERR_H
+#define LWIP_HDR_ERR_H
+
+#include "lwip/opt.h"
+#include "lwip/arch.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup infrastructure_errors Error codes
+ * @ingroup infrastructure
+ * @{
+ */
+
+/** Definitions for error constants. */
+typedef enum {
+/** No error, everything OK. */
+  ERR_OK         = 0,
+/** Out of memory error.     */
+  ERR_MEM        = -1,
+/** Buffer error.            */
+  ERR_BUF        = -2,
+/** Timeout.                 */
+  ERR_TIMEOUT    = -3,
+/** Routing problem.         */
+  ERR_RTE        = -4,
+/** Operation in progress    */
+  ERR_INPROGRESS = -5,
+/** Illegal value.           */
+  ERR_VAL        = -6,
+/** Operation would block.   */
+  ERR_WOULDBLOCK = -7,
+/** Address in use.          */
+  ERR_USE        = -8,
+/** Already connecting.      */
+  ERR_ALREADY    = -9,
+/** Conn already established.*/
+  ERR_ISCONN     = -10,
+/** Not connected.           */
+  ERR_CONN       = -11,
+/** Low-level netif error    */
+  ERR_IF         = -12,
+
+/** Connection aborted.      */
+  ERR_ABRT       = -13,
+/** Connection reset.        */
+  ERR_RST        = -14,
+/** Connection closed.       */
+  ERR_CLSD       = -15,
+/** Illegal argument.        */
+  ERR_ARG        = -16
+} err_enum_t;
+
+/** Define LWIP_ERR_T in cc.h if you want to use
+ *  a different type for your platform (must be signed). */
+#ifdef LWIP_ERR_T
+typedef LWIP_ERR_T err_t;
+#else /* LWIP_ERR_T */
+typedef s8_t err_t;
+#endif /* LWIP_ERR_T*/
+
+/**
+ * @}
+ */
+
+#ifdef LWIP_DEBUG
+extern const char *lwip_strerr(err_t err);
+#else
+#define lwip_strerr(x) ""
+#endif /* LWIP_DEBUG */
+
+#if !NO_SYS
+int err_to_errno(err_t err);
+#endif /* !NO_SYS */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_ERR_H */

src/lwip/include/lwip/errno.h

@@ -0,0 +1,198 @@
+/**
+ * @file
+ * Posix Errno defines
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_ERRNO_H
+#define LWIP_HDR_ERRNO_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef LWIP_PROVIDE_ERRNO
+
+#define  EPERM            1  /* Operation not permitted */
+#define  ENOENT           2  /* No such file or directory */
+#define  ESRCH            3  /* No such process */
+#define  EINTR            4  /* Interrupted system call */
+#define  EIO              5  /* I/O error */
+#define  ENXIO            6  /* No such device or address */
+#define  E2BIG            7  /* Arg list too long */
+#define  ENOEXEC          8  /* Exec format error */
+#define  EBADF            9  /* Bad file number */
+#define  ECHILD          10  /* No child processes */
+#define  EAGAIN          11  /* Try again */
+#define  ENOMEM          12  /* Out of memory */
+#define  EACCES          13  /* Permission denied */
+#define  EFAULT          14  /* Bad address */
+#define  ENOTBLK         15  /* Block device required */
+#define  EBUSY           16  /* Device or resource busy */
+#define  EEXIST          17  /* File exists */
+#define  EXDEV           18  /* Cross-device link */
+#define  ENODEV          19  /* No such device */
+#define  ENOTDIR         20  /* Not a directory */
+#define  EISDIR          21  /* Is a directory */
+#define  EINVAL          22  /* Invalid argument */
+#define  ENFILE          23  /* File table overflow */
+#define  EMFILE          24  /* Too many open files */
+#define  ENOTTY          25  /* Not a typewriter */
+#define  ETXTBSY         26  /* Text file busy */
+#define  EFBIG           27  /* File too large */
+#define  ENOSPC          28  /* No space left on device */
+#define  ESPIPE          29  /* Illegal seek */
+#define  EROFS           30  /* Read-only file system */
+#define  EMLINK          31  /* Too many links */
+#define  EPIPE           32  /* Broken pipe */
+#define  EDOM            33  /* Math argument out of domain of func */
+#define  ERANGE          34  /* Math result not representable */
+#define  EDEADLK         35  /* Resource deadlock would occur */
+#define  ENAMETOOLONG    36  /* File name too long */
+#define  ENOLCK          37  /* No record locks available */
+#define  ENOSYS          38  /* Function not implemented */
+#define  ENOTEMPTY       39  /* Directory not empty */
+#define  ELOOP           40  /* Too many symbolic links encountered */
+#define  EWOULDBLOCK     EAGAIN  /* Operation would block */
+#define  ENOMSG          42  /* No message of desired type */
+#define  EIDRM           43  /* Identifier removed */
+#define  ECHRNG          44  /* Channel number out of range */
+#define  EL2NSYNC        45  /* Level 2 not synchronized */
+#define  EL3HLT          46  /* Level 3 halted */
+#define  EL3RST          47  /* Level 3 reset */
+#define  ELNRNG          48  /* Link number out of range */
+#define  EUNATCH         49  /* Protocol driver not attached */
+#define  ENOCSI          50  /* No CSI structure available */
+#define  EL2HLT          51  /* Level 2 halted */
+#define  EBADE           52  /* Invalid exchange */
+#define  EBADR           53  /* Invalid request descriptor */
+#define  EXFULL          54  /* Exchange full */
+#define  ENOANO          55  /* No anode */
+#define  EBADRQC         56  /* Invalid request code */
+#define  EBADSLT         57  /* Invalid slot */
+
+#define  EDEADLOCK       EDEADLK
+
+#define  EBFONT          59  /* Bad font file format */
+#define  ENOSTR          60  /* Device not a stream */
+#define  ENODATA         61  /* No data available */
+#define  ETIME           62  /* Timer expired */
+#define  ENOSR           63  /* Out of streams resources */
+#define  ENONET          64  /* Machine is not on the network */
+#define  ENOPKG          65  /* Package not installed */
+#define  EREMOTE         66  /* Object is remote */
+#define  ENOLINK         67  /* Link has been severed */
+#define  EADV            68  /* Advertise error */
+#define  ESRMNT          69  /* Srmount error */
+#define  ECOMM           70  /* Communication error on send */
+#define  EPROTO          71  /* Protocol error */
+#define  EMULTIHOP       72  /* Multihop attempted */
+#define  EDOTDOT         73  /* RFS specific error */
+#define  EBADMSG         74  /* Not a data message */
+#define  EOVERFLOW       75  /* Value too large for defined data type */
+#define  ENOTUNIQ        76  /* Name not unique on network */
+#define  EBADFD          77  /* File descriptor in bad state */
+#define  EREMCHG         78  /* Remote address changed */
+#define  ELIBACC         79  /* Can not access a needed shared library */
+#define  ELIBBAD         80  /* Accessing a corrupted shared library */
+#define  ELIBSCN         81  /* .lib section in a.out corrupted */
+#define  ELIBMAX         82  /* Attempting to link in too many shared libraries */
+#define  ELIBEXEC        83  /* Cannot exec a shared library directly */
+#define  EILSEQ          84  /* Illegal byte sequence */
+#define  ERESTART        85  /* Interrupted system call should be restarted */
+#define  ESTRPIPE        86  /* Streams pipe error */
+#define  EUSERS          87  /* Too many users */
+#define  ENOTSOCK        88  /* Socket operation on non-socket */
+#define  EDESTADDRREQ    89  /* Destination address required */
+#define  EMSGSIZE        90  /* Message too long */
+#define  EPROTOTYPE      91  /* Protocol wrong type for socket */
+#define  ENOPROTOOPT     92  /* Protocol not available */
+#define  EPROTONOSUPPORT 93  /* Protocol not supported */
+#define  ESOCKTNOSUPPORT 94  /* Socket type not supported */
+#define  EOPNOTSUPP      95  /* Operation not supported on transport endpoint */
+#define  EPFNOSUPPORT    96  /* Protocol family not supported */
+#define  EAFNOSUPPORT    97  /* Address family not supported by protocol */
+#define  EADDRINUSE      98  /* Address already in use */
+#define  EADDRNOTAVAIL   99  /* Cannot assign requested address */
+#define  ENETDOWN       100  /* Network is down */
+#define  ENETUNREACH    101  /* Network is unreachable */
+#define  ENETRESET      102  /* Network dropped connection because of reset */
+#define  ECONNABORTED   103  /* Software caused connection abort */
+#define  ECONNRESET     104  /* Connection reset by peer */
+#define  ENOBUFS        105  /* No buffer space available */
+#define  EISCONN        106  /* Transport endpoint is already connected */
+#define  ENOTCONN       107  /* Transport endpoint is not connected */
+#define  ESHUTDOWN      108  /* Cannot send after transport endpoint shutdown */
+#define  ETOOMANYREFS   109  /* Too many references: cannot splice */
+#define  ETIMEDOUT      110  /* Connection timed out */
+#define  ECONNREFUSED   111  /* Connection refused */
+#define  EHOSTDOWN      112  /* Host is down */
+#define  EHOSTUNREACH   113  /* No route to host */
+#define  EALREADY       114  /* Operation already in progress */
+#define  EINPROGRESS    115  /* Operation now in progress */
+#define  ESTALE         116  /* Stale NFS file handle */
+#define  EUCLEAN        117  /* Structure needs cleaning */
+#define  ENOTNAM        118  /* Not a XENIX named type file */
+#define  ENAVAIL        119  /* No XENIX semaphores available */
+#define  EISNAM         120  /* Is a named type file */
+#define  EREMOTEIO      121  /* Remote I/O error */
+#define  EDQUOT         122  /* Quota exceeded */
+
+#define  ENOMEDIUM      123  /* No medium found */
+#define  EMEDIUMTYPE    124  /* Wrong medium type */
+
+#ifndef errno
+extern int errno;
+#endif
+
+#else /* LWIP_PROVIDE_ERRNO */
+
+/* Define LWIP_ERRNO_STDINCLUDE if you want to include <errno.h> here */
+#ifdef LWIP_ERRNO_STDINCLUDE
+#include <errno.h>
+#else /* LWIP_ERRNO_STDINCLUDE */
+/* Define LWIP_ERRNO_INCLUDE to an equivalent of <errno.h> to include the error defines here */
+#ifdef LWIP_ERRNO_INCLUDE
+#include LWIP_ERRNO_INCLUDE
+#endif /* LWIP_ERRNO_INCLUDE */
+#endif /* LWIP_ERRNO_STDINCLUDE */
+
+#endif /* LWIP_PROVIDE_ERRNO */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_ERRNO_H */

src/lwip/include/lwip/etharp.h

@@ -0,0 +1,110 @@
+/**
+ * @file
+ * Ethernet output function - handles OUTGOING ethernet level traffic, implements
+ * ARP resolving.
+ * To be used in most low-level netif implementations
+ */
+
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
+ * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef LWIP_HDR_NETIF_ETHARP_H
+#define LWIP_HDR_NETIF_ETHARP_H
+
+#include "lwip/opt.h"
+
+#if LWIP_ARP || LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/ip4_addr.h"
+#include "lwip/netif.h"
+#include "lwip/ip4.h"
+#include "lwip/prot/ethernet.h"
+
+#if LWIP_IPV4 && LWIP_ARP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/prot/etharp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** 1 seconds period */
+#define ARP_TMR_INTERVAL 1000
+
+#if ARP_QUEUEING
+/** struct for queueing outgoing packets for unknown address
+  * defined here to be accessed by memp.h
+  */
+struct etharp_q_entry {
+  struct etharp_q_entry *next;
+  struct pbuf *p;
+};
+#endif /* ARP_QUEUEING */
+
+#define etharp_init() /* Compatibility define, no init needed. */
+void etharp_tmr(void);
+ssize_t etharp_find_addr(struct netif *netif, const ip4_addr_t *ipaddr,
+         struct eth_addr **eth_ret, const ip4_addr_t **ip_ret);
+int etharp_get_entry(size_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_addr **eth_ret);
+err_t etharp_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr);
+err_t etharp_query(struct netif *netif, const ip4_addr_t *ipaddr, struct pbuf *q);
+err_t etharp_request(struct netif *netif, const ip4_addr_t *ipaddr);
+/** For Ethernet network interfaces, we might want to send "gratuitous ARP";
+ *  this is an ARP packet sent by a node in order to spontaneously cause other
+ *  nodes to update an entry in their ARP cache.
+ *  From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
+#define etharp_gratuitous(netif) etharp_request((netif), netif_ip4_addr(netif))
+void etharp_cleanup_netif(struct netif *netif);
+
+#if LWIP_ACD
+err_t etharp_acd_probe(struct netif *netif, const ip4_addr_t *ipaddr);
+err_t etharp_acd_announce(struct netif *netif, const ip4_addr_t *ipaddr);
+#endif /* LWIP_ACD */
+
+#if ETHARP_SUPPORT_STATIC_ENTRIES
+err_t etharp_add_static_entry(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr);
+err_t etharp_remove_static_entry(const ip4_addr_t *ipaddr);
+#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
+
+void etharp_input(struct pbuf *p, struct netif *netif);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV4 && LWIP_ARP */
+#endif /* LWIP_ARP || LWIP_ETHERNET */
+
+#endif /* LWIP_HDR_NETIF_ETHARP_H */

src/lwip/include/lwip/ethip6.h

@@ -0,0 +1,68 @@
+/**
+ * @file
+ *
+ * Ethernet output for IPv6. Uses ND tables for link-layer addressing.
+ */
+
+/*
+ * Copyright (c) 2010 Inico Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Ivan Delamer <delamer@inicotech.com>
+ *
+ *
+ * Please coordinate changes and requests with Ivan Delamer
+ * <delamer@inicotech.com>
+ */
+
+#ifndef LWIP_HDR_ETHIP6_H
+#define LWIP_HDR_ETHIP6_H
+
+#include "lwip/opt.h"
+
+#if LWIP_IPV6 && LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/ip6.h"
+#include "lwip/ip6_addr.h"
+#include "lwip/netif.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+err_t ethip6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV6 && LWIP_ETHERNET */
+
+#endif /* LWIP_HDR_ETHIP6_H */

src/lwip/include/lwip/icmp.h

@@ -0,0 +1,110 @@
+/**
+ * @file
+ * ICMP API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_ICMP_H
+#define LWIP_HDR_ICMP_H
+
+#include "lwip/opt.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/prot/icmp.h"
+
+#if LWIP_IPV6 && LWIP_ICMP6
+#include "lwip/icmp6.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** ICMP destination unreachable codes */
+enum icmp_dur_type {
+  /** net unreachable */
+  ICMP_DUR_NET   = 0,
+  /** host unreachable */
+  ICMP_DUR_HOST  = 1,
+  /** protocol unreachable */
+  ICMP_DUR_PROTO = 2,
+  /** port unreachable */
+  ICMP_DUR_PORT  = 3,
+  /** fragmentation needed and DF set */
+  ICMP_DUR_FRAG  = 4,
+  /** source route failed */
+  ICMP_DUR_SR    = 5
+};
+
+/** ICMP time exceeded codes */
+enum icmp_te_type {
+  /** time to live exceeded in transit */
+  ICMP_TE_TTL  = 0,
+  /** fragment reassembly time exceeded */
+  ICMP_TE_FRAG = 1
+};
+
+#if LWIP_IPV4 && LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
+
+void icmp_input(struct pbuf *p, struct netif *inp);
+void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
+void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
+
+#endif /* LWIP_IPV4 && LWIP_ICMP */
+
+#if LWIP_IPV4 && LWIP_IPV6
+#if LWIP_ICMP && LWIP_ICMP6
+#define icmp_port_unreach(isipv6, pbuf) ((isipv6) ? \
+                                         icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT) : \
+                                         icmp_dest_unreach(pbuf, ICMP_DUR_PORT))
+#elif LWIP_ICMP
+#define icmp_port_unreach(isipv6, pbuf) do{ if(!(isipv6)) { icmp_dest_unreach(pbuf, ICMP_DUR_PORT);}}while(0)
+#elif LWIP_ICMP6
+#define icmp_port_unreach(isipv6, pbuf) do{ if(isipv6) { icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT);}}while(0)
+#else
+#define icmp_port_unreach(isipv6, pbuf)
+#endif
+#elif LWIP_IPV6 && LWIP_ICMP6
+#define icmp_port_unreach(isipv6, pbuf) icmp6_dest_unreach(pbuf, ICMP6_DUR_PORT)
+#elif LWIP_IPV4 && LWIP_ICMP
+#define icmp_port_unreach(isipv6, pbuf) icmp_dest_unreach(pbuf, ICMP_DUR_PORT)
+#else /* (LWIP_IPV6 && LWIP_ICMP6) || (LWIP_IPV4 && LWIP_ICMP) */
+#define icmp_port_unreach(isipv6, pbuf)
+#endif /* (LWIP_IPV6 && LWIP_ICMP6) || (LWIP_IPV4 && LWIP_ICMP) LWIP_IPV4*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_ICMP_H */

src/lwip/include/lwip/icmp6.h

@@ -0,0 +1,72 @@
+/**
+ * @file
+ *
+ * IPv6 version of ICMP, as per RFC 4443.
+ */
+
+/*
+ * Copyright (c) 2010 Inico Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Ivan Delamer <delamer@inicotech.com>
+ *
+ *
+ * Please coordinate changes and requests with Ivan Delamer
+ * <delamer@inicotech.com>
+ */
+#ifndef LWIP_HDR_ICMP6_H
+#define LWIP_HDR_ICMP6_H
+
+#include "lwip/opt.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip6_addr.h"
+#include "lwip/netif.h"
+#include "lwip/prot/icmp6.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_ICMP6 && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
+
+void icmp6_input(struct pbuf *p, struct netif *inp);
+void icmp6_dest_unreach(struct pbuf *p, enum icmp6_dur_code c);
+void icmp6_packet_too_big(struct pbuf *p, u32_t mtu);
+void icmp6_time_exceeded(struct pbuf *p, enum icmp6_te_code c);
+void icmp6_time_exceeded_with_addrs(struct pbuf *p, enum icmp6_te_code c,
+    const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr);
+void icmp6_param_problem(struct pbuf *p, enum icmp6_pp_code c, const void *pointer);
+
+#endif /* LWIP_ICMP6 && LWIP_IPV6 */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* LWIP_HDR_ICMP6_H */

src/lwip/include/lwip/if_api.h

@@ -0,0 +1,70 @@
+/**
+ * @file
+ * Interface Identification APIs from:
+ *              RFC 3493: Basic Socket Interface Extensions for IPv6
+ *                  Section 4: Interface Identification
+ */
+
+/*
+ * Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. <joel.cunningham@garmin.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Joel Cunningham <joel.cunningham@me.com>
+ *
+ */
+#ifndef LWIP_HDR_IF_H
+#define LWIP_HDR_IF_H
+
+#include "lwip/opt.h"
+
+#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef IF_NAMESIZE
+#define IF_NAMESIZE NETIF_NAMESIZE
+#endif
+
+char * lwip_if_indextoname(unsigned int ifindex, char *ifname);
+unsigned int lwip_if_nametoindex(const char *ifname);
+
+#if LWIP_COMPAT_SOCKETS
+#define if_indextoname(ifindex, ifname)  lwip_if_indextoname(ifindex,ifname)
+#define if_nametoindex(ifname)           lwip_if_nametoindex(ifname)
+#endif /* LWIP_COMPAT_SOCKETS */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_SOCKET */
+
+#endif /* LWIP_HDR_IF_H */

src/lwip/include/lwip/igmp.h

@@ -0,0 +1,115 @@
+/**
+ * @file
+ * IGMP API
+ */
+
+/*
+ * Copyright (c) 2002 CITEL Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is a contribution to the lwIP TCP/IP stack.
+ * The Swedish Institute of Computer Science and Adam Dunkels
+ * are specifically granted permission to redistribute this
+ * source code.
+*/
+
+#ifndef LWIP_HDR_IGMP_H
+#define LWIP_HDR_IGMP_H
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/pbuf.h"
+
+#if LWIP_IPV4 && LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* IGMP timer */
+#define IGMP_TMR_INTERVAL              100 /* Milliseconds */
+#define IGMP_V1_DELAYING_MEMBER_TMR   (1000/IGMP_TMR_INTERVAL)
+#define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
+
+/* Compatibility defines (don't use for new code) */
+#define IGMP_DEL_MAC_FILTER            NETIF_DEL_MAC_FILTER
+#define IGMP_ADD_MAC_FILTER            NETIF_ADD_MAC_FILTER
+
+/**
+ * igmp group structure - there is
+ * a list of groups for each interface
+ * these should really be linked from the interface, but
+ * if we keep them separate we will not affect the lwip original code
+ * too much
+ *
+ * There will be a group for the all systems group address but this
+ * will not run the state machine as it is used to kick off reports
+ * from all the other groups
+ */
+struct igmp_group {
+  /** next link */
+  struct igmp_group *next;
+  /** multicast address */
+  ip4_addr_t         group_address;
+  /** signifies we were the last person to report */
+  u8_t               last_reporter_flag;
+  /** current state of the group */
+  u8_t               group_state;
+  /** timer for reporting, negative is OFF */
+  u16_t              timer;
+  /** counter of simultaneous uses */
+  u8_t               use;
+};
+
+/*  Prototypes */
+void   igmp_init(void);
+err_t  igmp_start(struct netif *netif);
+err_t  igmp_stop(struct netif *netif);
+void   igmp_report_groups(struct netif *netif);
+struct igmp_group *igmp_lookfor_group(struct netif *ifp, const ip4_addr_t *addr);
+void   igmp_input(struct pbuf *p, struct netif *inp, const ip4_addr_t *dest);
+err_t  igmp_joingroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr);
+err_t  igmp_joingroup_netif(struct netif *netif, const ip4_addr_t *groupaddr);
+err_t  igmp_leavegroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr);
+err_t  igmp_leavegroup_netif(struct netif *netif, const ip4_addr_t *groupaddr);
+void   igmp_tmr(void);
+
+/** @ingroup igmp
+ * Get list head of IGMP groups for netif.
+ * Note: The allsystems group IP is contained in the list as first entry.
+ * @see @ref netif_set_igmp_mac_filter()
+ */
+#define netif_igmp_data(netif) ((struct igmp_group *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV4 && LWIP_IGMP */
+
+#endif /* LWIP_HDR_IGMP_H */

src/lwip/include/lwip/inet.h

@@ -0,0 +1,188 @@
+/**
+ * @file
+ * This file (together with sockets.h) aims to provide structs and functions from
+ * - arpa/inet.h
+ * - netinet/in.h
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_INET_H
+#define LWIP_HDR_INET_H
+
+#include "lwip/opt.h"
+
+#if LWIP_SOCKET_EXTERNAL_HEADERS
+#include LWIP_SOCKET_EXTERNAL_HEADER_INET_H
+#else /* LWIP_SOCKET_EXTERNAL_HEADERS */
+
+#include "lwip/def.h"
+#include "lwip/ip_addr.h"
+#include "lwip/ip6_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* If your port already typedef's in_addr_t, define IN_ADDR_T_DEFINED
+   to prevent this code from redefining it. */
+#if !defined(in_addr_t) && !defined(IN_ADDR_T_DEFINED)
+typedef u32_t in_addr_t;
+#endif
+
+struct in_addr {
+  in_addr_t s_addr;
+};
+
+struct in6_addr {
+  union {
+    u32_t u32_addr[4];
+    u8_t  u8_addr[16];
+  } un;
+#define s6_addr  un.u8_addr
+};
+
+/** 255.255.255.255 */
+#define INADDR_NONE         IPADDR_NONE
+/** 127.0.0.1 */
+#define INADDR_LOOPBACK     IPADDR_LOOPBACK
+/** 0.0.0.0 */
+#define INADDR_ANY          IPADDR_ANY
+/** 255.255.255.255 */
+#define INADDR_BROADCAST    IPADDR_BROADCAST
+
+/** This macro can be used to initialize a variable of type struct in6_addr
+    to the IPv6 wildcard address. */
+#define IN6ADDR_ANY_INIT {{{0,0,0,0}}}
+/** This macro can be used to initialize a variable of type struct in6_addr
+    to the IPv6 loopback address. */
+#define IN6ADDR_LOOPBACK_INIT {{{0,0,0,PP_HTONL(1)}}}
+/** This variable is initialized by the system to contain the wildcard IPv6 address. */
+extern const struct in6_addr in6addr_any;
+
+/* Definitions of the bits in an (IPv4) Internet address integer.
+
+   On subnets, host and network parts are found according to
+   the subnet mask, not these masks.  */
+#define IN_CLASSA(a)        IP_CLASSA(a)
+#define IN_CLASSA_NET       IP_CLASSA_NET
+#define IN_CLASSA_NSHIFT    IP_CLASSA_NSHIFT
+#define IN_CLASSA_HOST      IP_CLASSA_HOST
+#define IN_CLASSA_MAX       IP_CLASSA_MAX
+
+#define IN_CLASSB(b)        IP_CLASSB(b)
+#define IN_CLASSB_NET       IP_CLASSB_NET
+#define IN_CLASSB_NSHIFT    IP_CLASSB_NSHIFT
+#define IN_CLASSB_HOST      IP_CLASSB_HOST
+#define IN_CLASSB_MAX       IP_CLASSB_MAX
+
+#define IN_CLASSC(c)        IP_CLASSC(c)
+#define IN_CLASSC_NET       IP_CLASSC_NET
+#define IN_CLASSC_NSHIFT    IP_CLASSC_NSHIFT
+#define IN_CLASSC_HOST      IP_CLASSC_HOST
+#define IN_CLASSC_MAX       IP_CLASSC_MAX
+
+#define IN_CLASSD(d)        IP_CLASSD(d)
+#define IN_CLASSD_NET       IP_CLASSD_NET     /* These ones aren't really */
+#define IN_CLASSD_NSHIFT    IP_CLASSD_NSHIFT  /*   net and host fields, but */
+#define IN_CLASSD_HOST      IP_CLASSD_HOST    /*   routing needn't know. */
+#define IN_CLASSD_MAX       IP_CLASSD_MAX
+
+#define IN_MULTICAST(a)     IP_MULTICAST(a)
+
+#define IN_EXPERIMENTAL(a)  IP_EXPERIMENTAL(a)
+#define IN_BADCLASS(a)      IP_BADCLASS(a)
+
+#define IN_LOOPBACKNET      IP_LOOPBACKNET
+
+#define IN6_IS_ADDR_UNSPECIFIED(a)  ip6_addr_isany((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_LOOPBACK(a)     ip6_addr_isloopback((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_MULTICAST(a)    ip6_addr_ismulticast((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_LINKLOCAL(a)    ip6_addr_islinklocal((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_SITELOCAL(a)    ip6_addr_issitelocal((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_V4MAPPED(a)     ip6_addr_isipv4mappedipv6((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_V4COMPAT(a)     ip6_addr_isipv4compat((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_MC_NODELOCAL(a) ip6_addr_ismulticast_iflocal((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_MC_LINKLOCAL(a) ip6_addr_ismulticast_linklocal((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_MC_SITELOCAL(a) ip6_addr_ismulticast_sitelocal((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_MC_ORGLOCAL(a)  ip6_addr_ismulticast_orglocal((ip6_addr_t*)(a))
+#define IN6_IS_ADDR_MC_GLOBAL(a)    ip6_addr_ismulticast_global((ip6_addr_t*)(a))
+
+#ifndef INET_ADDRSTRLEN
+#define INET_ADDRSTRLEN     IP4ADDR_STRLEN_MAX
+#endif
+#if LWIP_IPV6
+#ifndef INET6_ADDRSTRLEN
+#define INET6_ADDRSTRLEN    IP6ADDR_STRLEN_MAX
+#endif
+#endif
+
+#if LWIP_IPV4
+
+#define inet_addr_from_ip4addr(target_inaddr, source_ipaddr) ((target_inaddr)->s_addr = ip4_addr_get_u32(source_ipaddr))
+#define inet_addr_to_ip4addr(target_ipaddr, source_inaddr)   (ip4_addr_set_u32(target_ipaddr, (source_inaddr)->s_addr))
+
+/* directly map this to the lwip internal functions */
+#define inet_addr(cp)                   ipaddr_addr(cp)
+#define inet_aton(cp, addr)             ip4addr_aton(cp, (ip4_addr_t*)addr)
+#define inet_ntoa(addr)                 ip4addr_ntoa((const ip4_addr_t*)&(addr))
+#define inet_ntoa_r(addr, buf, buflen)  ip4addr_ntoa_r((const ip4_addr_t*)&(addr), buf, buflen)
+
+#endif /* LWIP_IPV4 */
+
+#if LWIP_IPV6
+#define inet6_addr_from_ip6addr(target_in6addr, source_ip6addr) {(target_in6addr)->un.u32_addr[0] = (source_ip6addr)->addr[0]; \
+                                                                 (target_in6addr)->un.u32_addr[1] = (source_ip6addr)->addr[1]; \
+                                                                 (target_in6addr)->un.u32_addr[2] = (source_ip6addr)->addr[2]; \
+                                                                 (target_in6addr)->un.u32_addr[3] = (source_ip6addr)->addr[3];}
+#define inet6_addr_to_ip6addr(target_ip6addr, source_in6addr)   {(target_ip6addr)->addr[0] = (source_in6addr)->un.u32_addr[0]; \
+                                                                 (target_ip6addr)->addr[1] = (source_in6addr)->un.u32_addr[1]; \
+                                                                 (target_ip6addr)->addr[2] = (source_in6addr)->un.u32_addr[2]; \
+                                                                 (target_ip6addr)->addr[3] = (source_in6addr)->un.u32_addr[3]; \
+                                                                 ip6_addr_clear_zone(target_ip6addr);}
+
+/* directly map this to the lwip internal functions */
+#define inet6_aton(cp, addr)            ip6addr_aton(cp, (ip6_addr_t*)addr)
+#define inet6_ntoa(addr)                ip6addr_ntoa((const ip6_addr_t*)&(addr))
+#define inet6_ntoa_r(addr, buf, buflen) ip6addr_ntoa_r((const ip6_addr_t*)&(addr), buf, buflen)
+
+#endif /* LWIP_IPV6 */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_SOCKET_EXTERNAL_HEADERS */
+
+#endif /* LWIP_HDR_INET_H */

src/lwip/include/lwip/inet_chksum.h

@@ -0,0 +1,104 @@
+/**
+ * @file
+ * IP checksum calculation functions
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_INET_CHKSUM_H
+#define LWIP_HDR_INET_CHKSUM_H
+
+#include "lwip/opt.h"
+
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+
+/** Swap the bytes in an u16_t: much like lwip_htons() for little-endian */
+#ifndef SWAP_BYTES_IN_WORD
+#define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)
+#endif /* SWAP_BYTES_IN_WORD */
+
+/** Split an u32_t in two u16_ts and add them up */
+#ifndef FOLD_U32T
+#define FOLD_U32T(u)          ((u32_t)(((u) >> 16) + ((u) & 0x0000ffffUL)))
+#endif
+
+#if LWIP_CHECKSUM_ON_COPY
+/** Function-like macro: same as MEMCPY but returns the checksum of copied data
+    as u16_t */
+# ifndef LWIP_CHKSUM_COPY
+#  define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len)
+#  ifndef LWIP_CHKSUM_COPY_ALGORITHM
+#   define LWIP_CHKSUM_COPY_ALGORITHM 1
+#  endif /* LWIP_CHKSUM_COPY_ALGORITHM */
+# else /* LWIP_CHKSUM_COPY */
+#  define LWIP_CHKSUM_COPY_ALGORITHM 0
+# endif /* LWIP_CHKSUM_COPY */
+#else /* LWIP_CHECKSUM_ON_COPY */
+# define LWIP_CHKSUM_COPY_ALGORITHM 0
+#endif /* LWIP_CHECKSUM_ON_COPY */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+u16_t inet_chksum(const void *dataptr, u16_t len);
+u16_t inet_chksum_pbuf(struct pbuf *p);
+#if LWIP_CHKSUM_COPY_ALGORITHM
+u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len);
+#endif /* LWIP_CHKSUM_COPY_ALGORITHM */
+
+#if LWIP_IPV4
+u16_t inet_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
+       const ip4_addr_t *src, const ip4_addr_t *dest);
+u16_t inet_chksum_pseudo_partial(struct pbuf *p, u8_t proto,
+       u16_t proto_len, u16_t chksum_len, const ip4_addr_t *src, const ip4_addr_t *dest);
+#endif /* LWIP_IPV4 */
+
+#if LWIP_IPV6
+u16_t ip6_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
+       const ip6_addr_t *src, const ip6_addr_t *dest);
+u16_t ip6_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len,
+       u16_t chksum_len, const ip6_addr_t *src, const ip6_addr_t *dest);
+#endif /* LWIP_IPV6 */
+
+
+u16_t ip_chksum_pseudo(struct pbuf *p, u8_t proto, u16_t proto_len,
+       const ip_addr_t *src, const ip_addr_t *dest);
+u16_t ip_chksum_pseudo_partial(struct pbuf *p, u8_t proto, u16_t proto_len,
+       u16_t chksum_len, const ip_addr_t *src, const ip_addr_t *dest);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_INET_H */

src/lwip/include/lwip/init.h

@@ -0,0 +1,100 @@
+/**
+ * @file
+ * lwIP initialization API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_INIT_H
+#define LWIP_HDR_INIT_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup lwip_version Version
+ * @ingroup lwip
+ * @{
+ */
+
+/** X.x.x: Major version of the stack */
+#define LWIP_VERSION_MAJOR      2
+/** x.X.x: Minor version of the stack */
+#define LWIP_VERSION_MINOR      2
+/** x.x.X: Revision of the stack */
+#define LWIP_VERSION_REVISION   0
+/** For release candidates, this is set to 1..254
+  * For official releases, this is set to 255 (LWIP_RC_RELEASE)
+  * For development versions (Git), this is set to 0 (LWIP_RC_DEVELOPMENT) */
+#define LWIP_VERSION_RC         LWIP_RC_RELEASE
+
+/** LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases */
+#define LWIP_RC_RELEASE         255
+/** LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions */
+#define LWIP_RC_DEVELOPMENT     0
+
+#define LWIP_VERSION_IS_RELEASE     (LWIP_VERSION_RC == LWIP_RC_RELEASE)
+#define LWIP_VERSION_IS_DEVELOPMENT (LWIP_VERSION_RC == LWIP_RC_DEVELOPMENT)
+#define LWIP_VERSION_IS_RC          ((LWIP_VERSION_RC != LWIP_RC_RELEASE) && (LWIP_VERSION_RC != LWIP_RC_DEVELOPMENT))
+
+/* Some helper defines to get a version string */
+#define LWIP_VERSTR2(x) #x
+#define LWIP_VERSTR(x) LWIP_VERSTR2(x)
+#if LWIP_VERSION_IS_RELEASE
+#define LWIP_VERSION_STRING_SUFFIX ""
+#elif LWIP_VERSION_IS_DEVELOPMENT
+#define LWIP_VERSION_STRING_SUFFIX "d"
+#else
+#define LWIP_VERSION_STRING_SUFFIX "rc" LWIP_VERSTR(LWIP_VERSION_RC)
+#endif
+
+/** Provides the version of the stack */
+#define LWIP_VERSION   ((LWIP_VERSION_MAJOR) << 24   | (LWIP_VERSION_MINOR) << 16 | \
+                        (LWIP_VERSION_REVISION) << 8 | (LWIP_VERSION_RC))
+/** Provides the version of the stack as string */
+#define LWIP_VERSION_STRING     LWIP_VERSTR(LWIP_VERSION_MAJOR) "." LWIP_VERSTR(LWIP_VERSION_MINOR) "." LWIP_VERSTR(LWIP_VERSION_REVISION) LWIP_VERSION_STRING_SUFFIX
+
+/**
+ * @}
+ */
+
+/* Modules initialization */
+void lwip_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_INIT_H */

src/lwip/include/lwip/init.h.cmake.in

@@ -0,0 +1,100 @@
+/**
+ * @file
+ * lwIP initialization API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_INIT_H
+#define LWIP_HDR_INIT_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup lwip_version Version
+ * @ingroup lwip
+ * @{
+ */
+
+/** X.x.x: Major version of the stack */
+#define LWIP_VERSION_MAJOR      ${LWIP_VERSION_MAJOR}
+/** x.X.x: Minor version of the stack */
+#define LWIP_VERSION_MINOR      ${LWIP_VERSION_MINOR}
+/** x.x.X: Revision of the stack */
+#define LWIP_VERSION_REVISION   ${LWIP_VERSION_REVISION}
+/** For release candidates, this is set to 1..254
+  * For official releases, this is set to 255 (LWIP_RC_RELEASE)
+  * For development versions (Git), this is set to 0 (LWIP_RC_DEVELOPMENT) */
+#define LWIP_VERSION_RC         ${LWIP_VERSION_RC}
+
+/** LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases */
+#define LWIP_RC_RELEASE         255
+/** LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions */
+#define LWIP_RC_DEVELOPMENT     0
+
+#define LWIP_VERSION_IS_RELEASE     (LWIP_VERSION_RC == LWIP_RC_RELEASE)
+#define LWIP_VERSION_IS_DEVELOPMENT (LWIP_VERSION_RC == LWIP_RC_DEVELOPMENT)
+#define LWIP_VERSION_IS_RC          ((LWIP_VERSION_RC != LWIP_RC_RELEASE) && (LWIP_VERSION_RC != LWIP_RC_DEVELOPMENT))
+
+/* Some helper defines to get a version string */
+#define LWIP_VERSTR2(x) #x
+#define LWIP_VERSTR(x) LWIP_VERSTR2(x)
+#if LWIP_VERSION_IS_RELEASE
+#define LWIP_VERSION_STRING_SUFFIX ""
+#elif LWIP_VERSION_IS_DEVELOPMENT
+#define LWIP_VERSION_STRING_SUFFIX "d"
+#else
+#define LWIP_VERSION_STRING_SUFFIX "rc" LWIP_VERSTR(LWIP_VERSION_RC)
+#endif
+
+/** Provides the version of the stack */
+#define LWIP_VERSION   ((LWIP_VERSION_MAJOR) << 24   | (LWIP_VERSION_MINOR) << 16 | \
+                        (LWIP_VERSION_REVISION) << 8 | (LWIP_VERSION_RC))
+/** Provides the version of the stack as string */
+#define LWIP_VERSION_STRING     LWIP_VERSTR(LWIP_VERSION_MAJOR) "." LWIP_VERSTR(LWIP_VERSION_MINOR) "." LWIP_VERSTR(LWIP_VERSION_REVISION) LWIP_VERSION_STRING_SUFFIX
+
+/**
+ * @}
+ */
+
+/* Modules initialization */
+void lwip_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_INIT_H */

src/lwip/include/lwip/ip.h

@@ -0,0 +1,339 @@
+/**
+ * @file
+ * IP API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_IP_H
+#define LWIP_HDR_IP_H
+
+#include "lwip/opt.h"
+
+#include "lwip/def.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+#include "lwip/netif.h"
+#include "lwip/ip4.h"
+#include "lwip/ip6.h"
+#include "lwip/prot/ip.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* This is passed as the destination address to ip_output_if (not
+   to ip_output), meaning that an IP header already is constructed
+   in the pbuf. This is used when TCP retransmits. */
+#define LWIP_IP_HDRINCL  NULL
+
+/** pbufs passed to IP must have a ref-count of 1 as their payload pointer
+    gets altered as the packet is passed down the stack */
+#ifndef LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX
+#define LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p) LWIP_ASSERT("p->ref == 1", (p)->ref == 1)
+#endif
+
+#if LWIP_NETIF_USE_HINTS
+#define IP_PCB_NETIFHINT ;struct netif_hint netif_hints
+#else /* LWIP_NETIF_USE_HINTS */
+#define IP_PCB_NETIFHINT
+#endif /* LWIP_NETIF_USE_HINTS */
+
+/** This is the common part of all PCB types. It needs to be at the
+   beginning of a PCB type definition. It is located here so that
+   changes to this common part are made in one location instead of
+   having to change all PCB structs. */
+#define IP_PCB                             \
+  /* ip addresses in network byte order */ \
+  ip_addr_t local_ip;                      \
+  ip_addr_t remote_ip;                     \
+  /* Bound netif index */                  \
+  u8_t netif_idx;                          \
+  /* Socket options */                     \
+  u8_t so_options;                         \
+  /* Type Of Service */                    \
+  u8_t tos;                                \
+  /* Time To Live */                       \
+  u8_t ttl                                 \
+  /* link layer address resolution hint */ \
+  IP_PCB_NETIFHINT
+
+struct ip_pcb {
+  /* Common members of all PCB types */
+  IP_PCB;
+};
+
+#if LWIP_VLAN_PCP
+#define pcb_has_tci(pcb) ((pcb)->netif_hints.tci >= 0)
+#define pcb_tci_get(pcb) ((pcb)->netif_hints.tci)
+#define pcb_tci_clear(pcb) do { (pcb)->netif_hints.tci = -1; } while(0)
+#define pcb_tci_set(pcb, tci_val) do { (pcb)->netif_hints.tci = (tci_val) & 0xffff; } while(0)
+#define pcb_tci_set_pcp_dei_vid(pcb, pcp, dei, vid) pcb_tci_set(pcb, (((pcp) & 7) << 13) | (((dei) & 1) << 12) | ((vid) & 0xFFF))
+#define pcb_tci_init(pcb) pcb_tci_clear(pcb)
+#else
+#define pcb_tci_init(pcb)
+#endif
+
+/*
+ * Option flags per-socket. These are the same like SO_XXX in sockets.h
+ */
+#define SOF_REUSEADDR     0x04U  /* allow local address reuse */
+#define SOF_KEEPALIVE     0x08U  /* keep connections alive */
+#define SOF_BROADCAST     0x20U  /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
+
+/* These flags are inherited (e.g. from a listen-pcb to a connection-pcb): */
+#define SOF_INHERITED   (SOF_REUSEADDR|SOF_KEEPALIVE)
+
+/** Global variables of this module, kept in a struct for efficient access using base+index. */
+struct ip_globals
+{
+  /** The interface that accepted the packet for the current callback invocation. */
+  struct netif *current_netif;
+  /** The interface that received the packet for the current callback invocation. */
+  struct netif *current_input_netif;
+#if LWIP_IPV4
+  /** Header of the input packet currently being processed. */
+  const struct ip_hdr *current_ip4_header;
+#endif /* LWIP_IPV4 */
+#if LWIP_IPV6
+  /** Header of the input IPv6 packet currently being processed. */
+  struct ip6_hdr *current_ip6_header;
+#endif /* LWIP_IPV6 */
+  /** Total header length of current_ip4/6_header (i.e. after this, the UDP/TCP header starts) */
+  u16_t current_ip_header_tot_len;
+  /** Source IP address of current_header */
+  ip_addr_t current_iphdr_src;
+  /** Destination IP address of current_header */
+  ip_addr_t current_iphdr_dest;
+};
+extern struct ip_globals ip_data;
+
+
+/** Get the interface that accepted the current packet.
+ * This may or may not be the receiving netif, depending on your netif/network setup.
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise. */
+#define ip_current_netif()      (ip_data.current_netif)
+/** Get the interface that received the current packet.
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise. */
+#define ip_current_input_netif() (ip_data.current_input_netif)
+/** Total header length of ip(6)_current_header() (i.e. after this, the UDP/TCP header starts) */
+#define ip_current_header_tot_len() (ip_data.current_ip_header_tot_len)
+/** Source IP address of current_header */
+#define ip_current_src_addr()   (&ip_data.current_iphdr_src)
+/** Destination IP address of current_header */
+#define ip_current_dest_addr()  (&ip_data.current_iphdr_dest)
+
+#if LWIP_IPV4 && LWIP_IPV6
+/** Get the IPv4 header of the current packet.
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise. */
+#define ip4_current_header()     ip_data.current_ip4_header
+/** Get the IPv6 header of the current packet.
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise. */
+#define ip6_current_header()      ((const struct ip6_hdr*)(ip_data.current_ip6_header))
+/** Returns TRUE if the current IP input packet is IPv6, FALSE if it is IPv4 */
+#define ip_current_is_v6()        (ip6_current_header() != NULL)
+/** Source IPv6 address of current_header */
+#define ip6_current_src_addr()    (ip_2_ip6(&ip_data.current_iphdr_src))
+/** Destination IPv6 address of current_header */
+#define ip6_current_dest_addr()   (ip_2_ip6(&ip_data.current_iphdr_dest))
+/** Get the transport layer protocol */
+#define ip_current_header_proto() (ip_current_is_v6() ? \
+                                   IP6H_NEXTH(ip6_current_header()) :\
+                                   IPH_PROTO(ip4_current_header()))
+/** Get the transport layer header */
+#define ip_next_header_ptr()     ((const void*)((ip_current_is_v6() ? \
+  (const u8_t*)ip6_current_header() : (const u8_t*)ip4_current_header())  + ip_current_header_tot_len()))
+
+/** Source IP4 address of current_header */
+#define ip4_current_src_addr()     (ip_2_ip4(&ip_data.current_iphdr_src))
+/** Destination IP4 address of current_header */
+#define ip4_current_dest_addr()    (ip_2_ip4(&ip_data.current_iphdr_dest))
+
+#elif LWIP_IPV4 /* LWIP_IPV4 && LWIP_IPV6 */
+
+/** Get the IPv4 header of the current packet.
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise. */
+#define ip4_current_header()     ip_data.current_ip4_header
+/** Always returns FALSE when only supporting IPv4 only */
+#define ip_current_is_v6()        0
+/** Get the transport layer protocol */
+#define ip_current_header_proto() IPH_PROTO(ip4_current_header())
+/** Get the transport layer header */
+#define ip_next_header_ptr()     ((const void*)((const u8_t*)ip4_current_header() + ip_current_header_tot_len()))
+/** Source IP4 address of current_header */
+#define ip4_current_src_addr()     (&ip_data.current_iphdr_src)
+/** Destination IP4 address of current_header */
+#define ip4_current_dest_addr()    (&ip_data.current_iphdr_dest)
+
+#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */
+
+/** Get the IPv6 header of the current packet.
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise. */
+#define ip6_current_header()      ((const struct ip6_hdr*)(ip_data.current_ip6_header))
+/** Always returns TRUE when only supporting IPv6 only */
+#define ip_current_is_v6()        1
+/** Get the transport layer protocol */
+#define ip_current_header_proto() IP6H_NEXTH(ip6_current_header())
+/** Get the transport layer header */
+#define ip_next_header_ptr()     ((const void*)(((const u8_t*)ip6_current_header()) + ip_current_header_tot_len()))
+/** Source IP6 address of current_header */
+#define ip6_current_src_addr()    (&ip_data.current_iphdr_src)
+/** Destination IP6 address of current_header */
+#define ip6_current_dest_addr()   (&ip_data.current_iphdr_dest)
+
+#endif /* LWIP_IPV6 */
+
+/** Union source address of current_header */
+#define ip_current_src_addr()    (&ip_data.current_iphdr_src)
+/** Union destination address of current_header */
+#define ip_current_dest_addr()   (&ip_data.current_iphdr_dest)
+
+/** Gets an IP pcb option (SOF_* flags) */
+#define ip_get_option(pcb, opt)   ((pcb)->so_options & (opt))
+/** Sets an IP pcb option (SOF_* flags) */
+#define ip_set_option(pcb, opt)   ((pcb)->so_options = (u8_t)((pcb)->so_options | (opt)))
+/** Resets an IP pcb option (SOF_* flags) */
+#define ip_reset_option(pcb, opt) ((pcb)->so_options = (u8_t)((pcb)->so_options & ~(opt)))
+
+#if LWIP_IPV4 && LWIP_IPV6
+/**
+ * @ingroup ip
+ * Output IP packet, netif is selected by source address
+ */
+#define ip_output(p, src, dest, ttl, tos, proto) \
+        (IP_IS_V6(dest) ? \
+        ip6_output(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto) : \
+        ip4_output(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto))
+/**
+ * @ingroup ip
+ * Output IP packet to specified interface
+ */
+#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \
+        (IP_IS_V6(dest) ? \
+        ip6_output_if(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif) : \
+        ip4_output_if(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif))
+/**
+ * @ingroup ip
+ * Output IP packet to interface specifying source address
+ */
+#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \
+        (IP_IS_V6(dest) ? \
+        ip6_output_if_src(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif) : \
+        ip4_output_if_src(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif))
+/** Output IP packet that already includes an IP header. */
+#define ip_output_if_hdrincl(p, src, dest, netif) \
+        (IP_IS_V6(dest) ? \
+        ip6_output_if(p, ip_2_ip6(src), LWIP_IP_HDRINCL, 0, 0, 0, netif) : \
+        ip4_output_if(p, ip_2_ip4(src), LWIP_IP_HDRINCL, 0, 0, 0, netif))
+/** Output IP packet with netif_hint */
+#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \
+        (IP_IS_V6(dest) ? \
+        ip6_output_hinted(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif_hint) : \
+        ip4_output_hinted(p, ip_2_ip4(src), ip_2_ip4(dest), ttl, tos, proto, netif_hint))
+/**
+ * @ingroup ip
+ * Get netif for address combination. See \ref ip6_route and \ref ip4_route
+ */
+#define ip_route(src, dest) \
+        (IP_IS_V6(dest) ? \
+        ip6_route(ip_2_ip6(src), ip_2_ip6(dest)) : \
+        ip4_route_src(ip_2_ip4(src), ip_2_ip4(dest)))
+/**
+ * @ingroup ip
+ * Get netif for IP.
+ */
+#define ip_netif_get_local_ip(netif, dest) (IP_IS_V6(dest) ? \
+        ip6_netif_get_local_ip(netif, ip_2_ip6(dest)) : \
+        ip4_netif_get_local_ip(netif))
+#define ip_debug_print(is_ipv6, p) ((is_ipv6) ? ip6_debug_print(p) : ip4_debug_print(p))
+
+err_t ip_input(struct pbuf *p, struct netif *inp);
+
+#elif LWIP_IPV4 /* LWIP_IPV4 && LWIP_IPV6 */
+
+#define ip_output(p, src, dest, ttl, tos, proto) \
+        ip4_output(p, src, dest, ttl, tos, proto)
+#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \
+        ip4_output_if(p, src, dest, ttl, tos, proto, netif)
+#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \
+        ip4_output_if_src(p, src, dest, ttl, tos, proto, netif)
+#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \
+        ip4_output_hinted(p, src, dest, ttl, tos, proto, netif_hint)
+#define ip_output_if_hdrincl(p, src, dest, netif) \
+        ip4_output_if(p, src, LWIP_IP_HDRINCL, 0, 0, 0, netif)
+#define ip_route(src, dest) \
+        ip4_route_src(src, dest)
+#define ip_netif_get_local_ip(netif, dest) \
+        ip4_netif_get_local_ip(netif)
+#define ip_debug_print(is_ipv6, p) ip4_debug_print(p)
+
+#define ip_input ip4_input
+
+#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */
+
+#define ip_output(p, src, dest, ttl, tos, proto) \
+        ip6_output(p, src, dest, ttl, tos, proto)
+#define ip_output_if(p, src, dest, ttl, tos, proto, netif) \
+        ip6_output_if(p, src, dest, ttl, tos, proto, netif)
+#define ip_output_if_src(p, src, dest, ttl, tos, proto, netif) \
+        ip6_output_if_src(p, src, dest, ttl, tos, proto, netif)
+#define ip_output_hinted(p, src, dest, ttl, tos, proto, netif_hint) \
+        ip6_output_hinted(p, src, dest, ttl, tos, proto, netif_hint)
+#define ip_output_if_hdrincl(p, src, dest, netif) \
+        ip6_output_if(p, src, LWIP_IP_HDRINCL, 0, 0, 0, netif)
+#define ip_route(src, dest) \
+        ip6_route(src, dest)
+#define ip_netif_get_local_ip(netif, dest) \
+        ip6_netif_get_local_ip(netif, dest)
+#define ip_debug_print(is_ipv6, p) ip6_debug_print(p)
+
+#define ip_input ip6_input
+
+#endif /* LWIP_IPV6 */
+
+#define ip_route_get_local_ip(src, dest, netif, ipaddr) do { \
+  (netif) = ip_route(src, dest); \
+  (ipaddr) = ip_netif_get_local_ip(netif, dest); \
+}while(0)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_IP_H */

src/lwip/include/lwip/ip4.h

@@ -0,0 +1,109 @@
+/**
+ * @file
+ * IPv4 API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_IP4_H
+#define LWIP_HDR_IP4_H
+
+#include "lwip/opt.h"
+
+#if LWIP_IPV4
+
+#include "lwip/def.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip4_addr.h"
+#include "lwip/err.h"
+#include "lwip/netif.h"
+#include "lwip/prot/ip4.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef LWIP_HOOK_IP4_ROUTE_SRC
+#define LWIP_IPV4_SRC_ROUTING   1
+#else
+#define LWIP_IPV4_SRC_ROUTING   0
+#endif
+
+/** Currently, the function ip_output_if_opt() is only used with IGMP */
+#define IP_OPTIONS_SEND   (LWIP_IPV4 && LWIP_IGMP)
+
+#define ip_init() /* Compatibility define, no init needed. */
+struct netif *ip4_route(const ip4_addr_t *dest);
+#if LWIP_IPV4_SRC_ROUTING
+struct netif *ip4_route_src(const ip4_addr_t *src, const ip4_addr_t *dest);
+#else /* LWIP_IPV4_SRC_ROUTING */
+#define ip4_route_src(src, dest) ip4_route(dest)
+#endif /* LWIP_IPV4_SRC_ROUTING */
+err_t ip4_input(struct pbuf *p, struct netif *inp);
+err_t ip4_output(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+       u8_t ttl, u8_t tos, u8_t proto);
+err_t ip4_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+       u8_t ttl, u8_t tos, u8_t proto, struct netif *netif);
+err_t ip4_output_if_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+       u8_t ttl, u8_t tos, u8_t proto, struct netif *netif);
+#if LWIP_NETIF_USE_HINTS
+err_t ip4_output_hinted(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+       u8_t ttl, u8_t tos, u8_t proto, struct netif_hint *netif_hint);
+#endif /* LWIP_NETIF_USE_HINTS */
+#if IP_OPTIONS_SEND
+err_t ip4_output_if_opt(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+       u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
+       u16_t optlen);
+err_t ip4_output_if_opt_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+       u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
+       u16_t optlen);
+#endif /* IP_OPTIONS_SEND */
+
+#if LWIP_MULTICAST_TX_OPTIONS
+void  ip4_set_default_multicast_netif(struct netif* default_multicast_netif);
+#endif /* LWIP_MULTICAST_TX_OPTIONS */
+
+#define ip4_netif_get_local_ip(netif) (((netif) != NULL) ? netif_ip_addr4(netif) : NULL)
+
+#if IP_DEBUG
+void ip4_debug_print(struct pbuf *p);
+#else
+#define ip4_debug_print(p)
+#endif /* IP_DEBUG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV4 */
+
+#endif /* LWIP_HDR_IP_H */

src/lwip/include/lwip/ip4_addr.h

@@ -0,0 +1,225 @@
+/**
+ * @file
+ * IPv4 address API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_IP4_ADDR_H
+#define LWIP_HDR_IP4_ADDR_H
+
+#include "lwip/opt.h"
+#include "lwip/def.h"
+
+#if LWIP_IPV4
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** This is the aligned version of ip4_addr_t,
+   used as local variable, on the stack, etc. */
+struct ip4_addr {
+  u32_t addr;
+};
+
+/** ip4_addr_t uses a struct for convenience only, so that the same defines can
+ * operate both on ip4_addr_t as well as on ip4_addr_p_t. */
+typedef struct ip4_addr ip4_addr_t;
+
+/* Forward declaration to not include netif.h */
+struct netif;
+
+/** 255.255.255.255 */
+#define IPADDR_NONE         ((u32_t)0xffffffffUL)
+/** 127.0.0.1 */
+#define IPADDR_LOOPBACK     ((u32_t)0x7f000001UL)
+/** 0.0.0.0 */
+#define IPADDR_ANY          ((u32_t)0x00000000UL)
+/** 255.255.255.255 */
+#define IPADDR_BROADCAST    ((u32_t)0xffffffffUL)
+
+/* Definitions of the bits in an Internet address integer.
+
+   On subnets, host and network parts are found according to
+   the subnet mask, not these masks.  */
+#define IP_CLASSA(a)        ((((u32_t)(a)) & 0x80000000UL) == 0)
+#define IP_CLASSA_NET       0xff000000
+#define IP_CLASSA_NSHIFT    24
+#define IP_CLASSA_HOST      (0xffffffff & ~IP_CLASSA_NET)
+#define IP_CLASSA_MAX       128
+
+#define IP_CLASSB(a)        ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL)
+#define IP_CLASSB_NET       0xffff0000
+#define IP_CLASSB_NSHIFT    16
+#define IP_CLASSB_HOST      (0xffffffff & ~IP_CLASSB_NET)
+#define IP_CLASSB_MAX       65536
+
+#define IP_CLASSC(a)        ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL)
+#define IP_CLASSC_NET       0xffffff00
+#define IP_CLASSC_NSHIFT    8
+#define IP_CLASSC_HOST      (0xffffffff & ~IP_CLASSC_NET)
+
+#define IP_CLASSD(a)        (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL)
+#define IP_CLASSD_NET       0xf0000000          /* These ones aren't really */
+#define IP_CLASSD_NSHIFT    28                  /*   net and host fields, but */
+#define IP_CLASSD_HOST      0x0fffffff          /*   routing needn't know. */
+#define IP_MULTICAST(a)     IP_CLASSD(a)
+
+#define IP_EXPERIMENTAL(a)  (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
+#define IP_BADCLASS(a)      (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
+
+#define IP_LOOPBACKNET      127                 /* official! */
+
+/** Set an IP address given by the four byte-parts */
+#define IP4_ADDR(ipaddr, a,b,c,d)  (ipaddr)->addr = PP_HTONL(LWIP_MAKEU32(a,b,c,d))
+
+/** Copy IP address - faster than ip4_addr_set: no NULL check */
+#define ip4_addr_copy(dest, src) ((dest).addr = (src).addr)
+/** Safely copy one IP address to another (src may be NULL) */
+#define ip4_addr_set(dest, src) ((dest)->addr = \
+                                    ((src) == NULL ? 0 : \
+                                    (src)->addr))
+/** Set complete address to zero */
+#define ip4_addr_set_zero(ipaddr)     ((ipaddr)->addr = 0)
+/** Set address to IPADDR_ANY (no need for lwip_htonl()) */
+#define ip4_addr_set_any(ipaddr)      ((ipaddr)->addr = IPADDR_ANY)
+/** Set address to loopback address */
+#define ip4_addr_set_loopback(ipaddr) ((ipaddr)->addr = PP_HTONL(IPADDR_LOOPBACK))
+/** Check if an address is in the loopback region */
+#define ip4_addr_isloopback(ipaddr)    (((ipaddr)->addr & PP_HTONL(IP_CLASSA_NET)) == PP_HTONL(((u32_t)IP_LOOPBACKNET) << 24))
+/** Safely copy one IP address to another and change byte order
+ * from host- to network-order. */
+#define ip4_addr_set_hton(dest, src) ((dest)->addr = \
+                               ((src) == NULL ? 0:\
+                               lwip_htonl((src)->addr)))
+/** IPv4 only: set the IP address given as an u32_t */
+#define ip4_addr_set_u32(dest_ipaddr, src_u32) ((dest_ipaddr)->addr = (src_u32))
+/** IPv4 only: get the IP address as an u32_t */
+#define ip4_addr_get_u32(src_ipaddr) ((src_ipaddr)->addr)
+
+/** Get the network address by combining host address with netmask */
+#define ip4_addr_get_network(target, host, netmask) do { ((target)->addr = ((host)->addr) & ((netmask)->addr)); } while(0)
+
+/**
+ * Determine if two address are on the same network.
+ * @deprecated Renamed to @ref ip4_addr_net_eq
+ */
+#define ip4_addr_netcmp(addr1, addr2, mask) ip4_addr_net_eq(addr1, addr2, mask)
+/**
+ * Determine if two address are on the same network.
+ *
+ * @arg addr1 IP address 1
+ * @arg addr2 IP address 2
+ * @arg mask network identifier mask
+ * @return !0 if the network identifiers of both address match
+ */
+#define ip4_addr_net_eq(addr1, addr2, mask) (((addr1)->addr & \
+                                              (mask)->addr) == \
+                                             ((addr2)->addr & \
+                                              (mask)->addr))
+/**
+ * @deprecated Renamed to ip4_addr_eq
+ */
+#define ip4_addr_cmp(addr1, addr2) ip4_addr_eq(addr1, addr2)
+#define ip4_addr_eq(addr1, addr2) ((addr1)->addr == (addr2)->addr)
+
+#define ip4_addr_isany_val(addr1)   ((addr1).addr == IPADDR_ANY)
+#define ip4_addr_isany(addr1) ((addr1) == NULL || ip4_addr_isany_val(*(addr1)))
+
+#define ip4_addr_isbroadcast(addr1, netif) ip4_addr_isbroadcast_u32((addr1)->addr, netif)
+u8_t ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif);
+
+#define ip_addr_netmask_valid(netmask) ip4_addr_netmask_valid((netmask)->addr)
+u8_t ip4_addr_netmask_valid(u32_t netmask);
+
+#define ip4_addr_ismulticast(addr1) (((addr1)->addr & PP_HTONL(0xf0000000UL)) == PP_HTONL(0xe0000000UL))
+
+#define ip4_addr_islinklocal(addr1) (((addr1)->addr & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xa9fe0000UL))
+
+#define ip4_addr_debug_print_parts(debug, a, b, c, d) \
+  LWIP_DEBUGF(debug, ("%" U16_F ".%" U16_F ".%" U16_F ".%" U16_F, a, b, c, d))
+#define ip4_addr_debug_print(debug, ipaddr) \
+  ip4_addr_debug_print_parts(debug, \
+                      (u16_t)((ipaddr) != NULL ? ip4_addr1_16(ipaddr) : 0),       \
+                      (u16_t)((ipaddr) != NULL ? ip4_addr2_16(ipaddr) : 0),       \
+                      (u16_t)((ipaddr) != NULL ? ip4_addr3_16(ipaddr) : 0),       \
+                      (u16_t)((ipaddr) != NULL ? ip4_addr4_16(ipaddr) : 0))
+#define ip4_addr_debug_print_val(debug, ipaddr) \
+  ip4_addr_debug_print_parts(debug, \
+                      ip4_addr1_16_val(ipaddr),       \
+                      ip4_addr2_16_val(ipaddr),       \
+                      ip4_addr3_16_val(ipaddr),       \
+                      ip4_addr4_16_val(ipaddr))
+
+/* Get one byte from the 4-byte address */
+#define ip4_addr_get_byte(ipaddr, idx) (((const u8_t*)(&(ipaddr)->addr))[idx])
+#define ip4_addr1(ipaddr) ip4_addr_get_byte(ipaddr, 0)
+#define ip4_addr2(ipaddr) ip4_addr_get_byte(ipaddr, 1)
+#define ip4_addr3(ipaddr) ip4_addr_get_byte(ipaddr, 2)
+#define ip4_addr4(ipaddr) ip4_addr_get_byte(ipaddr, 3)
+/* Get one byte from the 4-byte address, but argument is 'ip4_addr_t',
+ * not a pointer */
+#define ip4_addr_get_byte_val(ipaddr, idx) ((u8_t)(((ipaddr).addr >> (idx * 8)) & 0xff))
+#define ip4_addr1_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 0)
+#define ip4_addr2_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 1)
+#define ip4_addr3_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 2)
+#define ip4_addr4_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 3)
+/* These are cast to u16_t, with the intent that they are often arguments
+ * to printf using the U16_F format from cc.h. */
+#define ip4_addr1_16(ipaddr) ((u16_t)ip4_addr1(ipaddr))
+#define ip4_addr2_16(ipaddr) ((u16_t)ip4_addr2(ipaddr))
+#define ip4_addr3_16(ipaddr) ((u16_t)ip4_addr3(ipaddr))
+#define ip4_addr4_16(ipaddr) ((u16_t)ip4_addr4(ipaddr))
+#define ip4_addr1_16_val(ipaddr) ((u16_t)ip4_addr1_val(ipaddr))
+#define ip4_addr2_16_val(ipaddr) ((u16_t)ip4_addr2_val(ipaddr))
+#define ip4_addr3_16_val(ipaddr) ((u16_t)ip4_addr3_val(ipaddr))
+#define ip4_addr4_16_val(ipaddr) ((u16_t)ip4_addr4_val(ipaddr))
+
+#define IP4ADDR_STRLEN_MAX  16
+
+/** For backwards compatibility */
+#define ip_ntoa(ipaddr)  ipaddr_ntoa(ipaddr)
+
+u32_t ipaddr_addr(const char *cp);
+int ip4addr_aton(const char *cp, ip4_addr_t *addr);
+/** returns ptr to static buffer; not reentrant! */
+char *ip4addr_ntoa(const ip4_addr_t *addr);
+char *ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV4 */
+
+#endif /* LWIP_HDR_IP_ADDR_H */

src/lwip/include/lwip/ip4_frag.h

@@ -0,0 +1,100 @@
+/**
+ * @file
+ * IP fragmentation/reassembly
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Jani Monoses <jani@iv.ro>
+ *
+ */
+
+#ifndef LWIP_HDR_IP4_FRAG_H
+#define LWIP_HDR_IP4_FRAG_H
+
+#include "lwip/opt.h"
+#include "lwip/err.h"
+#include "lwip/pbuf.h"
+#include "lwip/netif.h"
+#include "lwip/ip_addr.h"
+#include "lwip/ip.h"
+
+#if LWIP_IPV4
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if IP_REASSEMBLY
+/* The IP reassembly timer interval in milliseconds. */
+#define IP_TMR_INTERVAL 1000
+
+/** IP reassembly helper struct.
+ * This is exported because memp needs to know the size.
+ */
+struct ip_reassdata {
+  struct ip_reassdata *next;
+  struct pbuf *p;
+  struct ip_hdr iphdr;
+  u16_t datagram_len;
+  u8_t flags;
+  u8_t timer;
+};
+
+void ip_reass_init(void);
+void ip_reass_tmr(void);
+struct pbuf * ip4_reass(struct pbuf *p);
+#endif /* IP_REASSEMBLY */
+
+#if IP_FRAG
+#if !LWIP_NETIF_TX_SINGLE_PBUF
+#ifndef LWIP_PBUF_CUSTOM_REF_DEFINED
+#define LWIP_PBUF_CUSTOM_REF_DEFINED
+/** A custom pbuf that holds a reference to another pbuf, which is freed
+ * when this custom pbuf is freed. This is used to create a custom PBUF_REF
+ * that points into the original pbuf. */
+struct pbuf_custom_ref {
+  /** 'base class' */
+  struct pbuf_custom pc;
+  /** pointer to the original pbuf that is referenced */
+  struct pbuf *original;
+};
+#endif /* LWIP_PBUF_CUSTOM_REF_DEFINED */
+#endif /* !LWIP_NETIF_TX_SINGLE_PBUF */
+
+err_t ip4_frag(struct pbuf *p, struct netif *netif, const ip4_addr_t *dest);
+#endif /* IP_FRAG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV4 */
+
+#endif /* LWIP_HDR_IP4_FRAG_H */

src/lwip/include/lwip/ip6.h

@@ -0,0 +1,93 @@
+/**
+ * @file
+ *
+ * IPv6 layer.
+ */
+
+/*
+ * Copyright (c) 2010 Inico Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Ivan Delamer <delamer@inicotech.com>
+ *
+ *
+ * Please coordinate changes and requests with Ivan Delamer
+ * <delamer@inicotech.com>
+ */
+#ifndef LWIP_HDR_IP6_H
+#define LWIP_HDR_IP6_H
+
+#include "lwip/opt.h"
+
+#if LWIP_IPV6  /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/ip6_addr.h"
+#include "lwip/prot/ip6.h"
+#include "lwip/def.h"
+#include "lwip/pbuf.h"
+#include "lwip/netif.h"
+
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct netif *ip6_route(const ip6_addr_t *src, const ip6_addr_t *dest);
+const ip_addr_t *ip6_select_source_address(struct netif *netif, const ip6_addr_t * dest);
+err_t         ip6_input(struct pbuf *p, struct netif *inp);
+err_t         ip6_output(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest,
+                         u8_t hl, u8_t tc, u8_t nexth);
+err_t         ip6_output_if(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest,
+                            u8_t hl, u8_t tc, u8_t nexth, struct netif *netif);
+err_t         ip6_output_if_src(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest,
+                            u8_t hl, u8_t tc, u8_t nexth, struct netif *netif);
+#if LWIP_NETIF_USE_HINTS
+err_t         ip6_output_hinted(struct pbuf *p, const ip6_addr_t *src, const ip6_addr_t *dest,
+                                u8_t hl, u8_t tc, u8_t nexth, struct netif_hint *netif_hint);
+#endif /* LWIP_NETIF_USE_HINTS */
+#if LWIP_IPV6_MLD
+err_t         ip6_options_add_hbh_ra(struct pbuf * p, u8_t nexth, u8_t value);
+#endif /* LWIP_IPV6_MLD */
+
+#define ip6_netif_get_local_ip(netif, dest) (((netif) != NULL) ? \
+  ip6_select_source_address(netif, dest) : NULL)
+
+#if IP6_DEBUG
+void ip6_debug_print(struct pbuf *p);
+#else
+#define ip6_debug_print(p)
+#endif /* IP6_DEBUG */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV6 */
+
+#endif /* LWIP_HDR_IP6_H */

src/lwip/include/lwip/ip6_addr.h

@@ -0,0 +1,372 @@
+/**
+ * @file
+ *
+ * IPv6 addresses.
+ */
+
+/*
+ * Copyright (c) 2010 Inico Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Ivan Delamer <delamer@inicotech.com>
+ *
+ * Structs and macros for handling IPv6 addresses.
+ *
+ * Please coordinate changes and requests with Ivan Delamer
+ * <delamer@inicotech.com>
+ */
+#ifndef LWIP_HDR_IP6_ADDR_H
+#define LWIP_HDR_IP6_ADDR_H
+
+#include "lwip/opt.h"
+#include "def.h"
+
+#if LWIP_IPV6  /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/ip6_zone.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/** This is the aligned version of ip6_addr_t,
+    used as local variable, on the stack, etc. */
+struct ip6_addr {
+  u32_t addr[4];
+#if LWIP_IPV6_SCOPES
+  u8_t zone;
+#endif /* LWIP_IPV6_SCOPES */
+};
+
+/** IPv6 address */
+typedef struct ip6_addr ip6_addr_t;
+
+/** Set an IPv6 partial address given by byte-parts */
+#define IP6_ADDR_PART(ip6addr, index, a,b,c,d) \
+  (ip6addr)->addr[index] = PP_HTONL(LWIP_MAKEU32(a,b,c,d))
+
+/** Set a full IPv6 address by passing the 4 u32_t indices in network byte order
+    (use PP_HTONL() for constants) */
+#define IP6_ADDR(ip6addr, idx0, idx1, idx2, idx3) do { \
+  (ip6addr)->addr[0] = idx0; \
+  (ip6addr)->addr[1] = idx1; \
+  (ip6addr)->addr[2] = idx2; \
+  (ip6addr)->addr[3] = idx3; \
+  ip6_addr_clear_zone(ip6addr); } while(0)
+
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK1(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[0]) >> 16) & 0xffff))
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK2(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[0])) & 0xffff))
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK3(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[1]) >> 16) & 0xffff))
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK4(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[1])) & 0xffff))
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK5(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[2]) >> 16) & 0xffff))
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK6(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[2])) & 0xffff))
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK7(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[3]) >> 16) & 0xffff))
+/** Access address in 16-bit block */
+#define IP6_ADDR_BLOCK8(ip6addr) ((u16_t)((lwip_htonl((ip6addr)->addr[3])) & 0xffff))
+
+/** Copy IPv6 address - faster than ip6_addr_set: no NULL check */
+#define ip6_addr_copy(dest, src) do{(dest).addr[0] = (src).addr[0]; \
+                                    (dest).addr[1] = (src).addr[1]; \
+                                    (dest).addr[2] = (src).addr[2]; \
+                                    (dest).addr[3] = (src).addr[3]; \
+                                    ip6_addr_copy_zone((dest), (src)); }while(0)
+/** Safely copy one IPv6 address to another (src may be NULL) */
+#define ip6_addr_set(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : (src)->addr[0]; \
+                                   (dest)->addr[1] = (src) == NULL ? 0 : (src)->addr[1]; \
+                                   (dest)->addr[2] = (src) == NULL ? 0 : (src)->addr[2]; \
+                                   (dest)->addr[3] = (src) == NULL ? 0 : (src)->addr[3]; \
+                                   ip6_addr_set_zone((dest), (src) == NULL ? IP6_NO_ZONE : ip6_addr_zone(src)); }while(0)
+
+/** Copy packed IPv6 address to unpacked IPv6 address; zone is not set */
+#define ip6_addr_copy_from_packed(dest, src) do{(dest).addr[0] = (src).addr[0]; \
+                                    (dest).addr[1] = (src).addr[1]; \
+                                    (dest).addr[2] = (src).addr[2]; \
+                                    (dest).addr[3] = (src).addr[3]; \
+                                    ip6_addr_clear_zone(&dest); }while(0)
+
+/** Copy unpacked IPv6 address to packed IPv6 address; zone is lost */
+#define ip6_addr_copy_to_packed(dest, src) do{(dest).addr[0] = (src).addr[0]; \
+                                    (dest).addr[1] = (src).addr[1]; \
+                                    (dest).addr[2] = (src).addr[2]; \
+                                    (dest).addr[3] = (src).addr[3]; }while(0)
+
+/** Set complete address to zero */
+#define ip6_addr_set_zero(ip6addr)    do{(ip6addr)->addr[0] = 0; \
+                                         (ip6addr)->addr[1] = 0; \
+                                         (ip6addr)->addr[2] = 0; \
+                                         (ip6addr)->addr[3] = 0; \
+                                         ip6_addr_clear_zone(ip6addr);}while(0)
+
+/** Set address to ipv6 'any' (no need for lwip_htonl()) */
+#define ip6_addr_set_any(ip6addr)       ip6_addr_set_zero(ip6addr)
+/** Set address to ipv6 loopback address */
+#define ip6_addr_set_loopback(ip6addr) do{(ip6addr)->addr[0] = 0; \
+                                          (ip6addr)->addr[1] = 0; \
+                                          (ip6addr)->addr[2] = 0; \
+                                          (ip6addr)->addr[3] = PP_HTONL(0x00000001UL); \
+                                          ip6_addr_clear_zone(ip6addr);}while(0)
+/** Safely copy one IPv6 address to another and change byte order
+ * from host- to network-order. */
+#define ip6_addr_set_hton(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : lwip_htonl((src)->addr[0]); \
+                                        (dest)->addr[1] = (src) == NULL ? 0 : lwip_htonl((src)->addr[1]); \
+                                        (dest)->addr[2] = (src) == NULL ? 0 : lwip_htonl((src)->addr[2]); \
+                                        (dest)->addr[3] = (src) == NULL ? 0 : lwip_htonl((src)->addr[3]); \
+                                        ip6_addr_set_zone((dest), (src) == NULL ? IP6_NO_ZONE : ip6_addr_zone(src));}while(0)
+
+
+/** @deprecated Renamed to @ref ip6_addr_net_zoneless_eq */
+#define ip6_addr_netcmp_zoneless(addr1, addr2) ip6_addr_net_zoneless_eq(addr1, addr2)
+/** Compare IPv6 networks, ignoring zone information. To be used sparingly! */
+#define ip6_addr_net_zoneless_eq(addr1, addr2) (((addr1)->addr[0] == (addr2)->addr[0]) && \
+                                               ((addr1)->addr[1] == (addr2)->addr[1]))
+
+/**
+ * Determine if two IPv6 address are on the same network.
+ * @deprecated Renamed to @ref ip6_addr_net_eq
+ */
+#define ip6_addr_netcmp(addr1, addr2) ip6_addr_net_eq(addr1, addr2)
+/**
+ * Determine if two IPv6 address are on the same network.
+ *
+ * @param addr1 IPv6 address 1
+ * @param addr2 IPv6 address 2
+ * @return 1 if the network identifiers of both address match, 0 if not
+ */
+#define ip6_addr_net_eq(addr1, addr2) (ip6_addr_net_zoneless_eq((addr1), (addr2)) && \
+                                       ip6_addr_zone_eq((addr1), (addr2)))
+
+#define ip6_addr_nethostcmp(addr1, addr2) ip6_addr_nethost_eq(addr1, addr2)
+/* Exact-host comparison *after* ip6_addr_net_eq() succeeded, for efficiency. */
+#define ip6_addr_nethost_eq(addr1, addr2) (((addr1)->addr[2] == (addr2)->addr[2]) && \
+                                           ((addr1)->addr[3] == (addr2)->addr[3]))
+
+/** @deprecated Renamed to @ref ip6_addr_zoneless_eq */
+#define ip6_addr_cmp_zoneless(addr1, addr2) ip6_addr_zoneless_eq(addr1, addr2)
+/** Compare IPv6 addresses, ignoring zone information. To be used sparingly! */
+#define ip6_addr_zoneless_eq(addr1, addr2) (((addr1)->addr[0] == (addr2)->addr[0]) && \
+                                    ((addr1)->addr[1] == (addr2)->addr[1]) && \
+                                    ((addr1)->addr[2] == (addr2)->addr[2]) && \
+                                    ((addr1)->addr[3] == (addr2)->addr[3]))
+/** @deprecated Renamed to @ref ip6_addr_eq */
+#define ip6_addr_cmp(addr1, addr2) ip6_addr_eq(addr1, addr2)
+/**
+ * Determine if two IPv6 addresses are the same. In particular, the address
+ * part of both must be the same, and the zone must be compatible.
+ *
+ * @param addr1 IPv6 address 1
+ * @param addr2 IPv6 address 2
+ * @return 1 if the addresses are considered equal, 0 if not
+ */
+#define ip6_addr_eq(addr1, addr2) (ip6_addr_zoneless_eq((addr1), (addr2)) && \
+                                    ip6_addr_zone_eq((addr1), (addr2)))
+
+/** @deprecated Renamed to @ref ip6_addr_packed_eq */
+#define ip6_addr_cmp_packed(ip6addr, paddr, zone_idx) ip6_addr_packed_eq(ip6addr, paddr, zone_idx)
+/** Compare IPv6 address to packed address and zone */
+#define ip6_addr_packed_eq(ip6addr, paddr, zone_idx) (((ip6addr)->addr[0] == (paddr)->addr[0]) && \
+                                    ((ip6addr)->addr[1] == (paddr)->addr[1]) && \
+                                    ((ip6addr)->addr[2] == (paddr)->addr[2]) && \
+                                    ((ip6addr)->addr[3] == (paddr)->addr[3]) && \
+                                    ip6_addr_equals_zone((ip6addr), (zone_idx)))
+
+#define ip6_get_subnet_id(ip6addr)   (lwip_htonl((ip6addr)->addr[2]) & 0x0000ffffUL)
+
+#define ip6_addr_isany_val(ip6addr) (((ip6addr).addr[0] == 0) && \
+                                     ((ip6addr).addr[1] == 0) && \
+                                     ((ip6addr).addr[2] == 0) && \
+                                     ((ip6addr).addr[3] == 0))
+#define ip6_addr_isany(ip6addr) (((ip6addr) == NULL) || ip6_addr_isany_val(*(ip6addr)))
+
+#define ip6_addr_isloopback(ip6addr) (((ip6addr)->addr[0] == 0UL) && \
+                                      ((ip6addr)->addr[1] == 0UL) && \
+                                      ((ip6addr)->addr[2] == 0UL) && \
+                                      ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))
+
+#define ip6_addr_isglobal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xe0000000UL)) == PP_HTONL(0x20000000UL))
+
+#define ip6_addr_islinklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfe800000UL))
+
+#define ip6_addr_issitelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfec00000UL))
+
+#define ip6_addr_isuniquelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xfe000000UL)) == PP_HTONL(0xfc000000UL))
+
+#define ip6_addr_isipv4mappedipv6(ip6addr) (((ip6addr)->addr[0] == 0) && ((ip6addr)->addr[1] == 0) && (((ip6addr)->addr[2]) == PP_HTONL(0x0000FFFFUL)))
+
+#define ip6_addr_isipv4compat(ip6addr) (((ip6addr)->addr[0] == 0UL) && \
+                                        ((ip6addr)->addr[1] == 0UL) && \
+                                        ((ip6addr)->addr[2] == 0UL) && \
+                                        (htonl((ip6addr)->addr[3]) > 1))
+
+#define ip6_addr_ismulticast(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL))
+#define ip6_addr_multicast_transient_flag(ip6addr)  ((ip6addr)->addr[0] & PP_HTONL(0x00100000UL))
+#define ip6_addr_multicast_prefix_flag(ip6addr)     ((ip6addr)->addr[0] & PP_HTONL(0x00200000UL))
+#define ip6_addr_multicast_rendezvous_flag(ip6addr) ((ip6addr)->addr[0] & PP_HTONL(0x00400000UL))
+#define ip6_addr_multicast_scope(ip6addr) ((lwip_htonl((ip6addr)->addr[0]) >> 16) & 0xf)
+#define IP6_MULTICAST_SCOPE_RESERVED            0x0
+#define IP6_MULTICAST_SCOPE_RESERVED0           0x0
+#define IP6_MULTICAST_SCOPE_INTERFACE_LOCAL     0x1
+#define IP6_MULTICAST_SCOPE_LINK_LOCAL          0x2
+#define IP6_MULTICAST_SCOPE_RESERVED3           0x3
+#define IP6_MULTICAST_SCOPE_ADMIN_LOCAL         0x4
+#define IP6_MULTICAST_SCOPE_SITE_LOCAL          0x5
+#define IP6_MULTICAST_SCOPE_ORGANIZATION_LOCAL  0x8
+#define IP6_MULTICAST_SCOPE_GLOBAL              0xe
+#define IP6_MULTICAST_SCOPE_RESERVEDF           0xf
+#define ip6_addr_ismulticast_iflocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff010000UL))
+#define ip6_addr_ismulticast_linklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff020000UL))
+#define ip6_addr_ismulticast_adminlocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff040000UL))
+#define ip6_addr_ismulticast_sitelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff050000UL))
+#define ip6_addr_ismulticast_orglocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff080000UL))
+#define ip6_addr_ismulticast_global(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff0e0000UL))
+
+/* Scoping note: while interface-local and link-local multicast addresses do
+ * have a scope (i.e., they are meaningful only in the context of a particular
+ * interface), the following functions are not assigning or comparing zone
+ * indices. The reason for this is backward compatibility. Any call site that
+ * produces a non-global multicast address must assign a multicast address as
+ * appropriate itself. */
+
+#define ip6_addr_isallnodes_iflocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff010000UL)) && \
+    ((ip6addr)->addr[1] == 0UL) && \
+    ((ip6addr)->addr[2] == 0UL) && \
+    ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))
+
+#define ip6_addr_isallnodes_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
+    ((ip6addr)->addr[1] == 0UL) && \
+    ((ip6addr)->addr[2] == 0UL) && \
+    ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))
+#define ip6_addr_set_allnodes_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \
+                (ip6addr)->addr[1] = 0; \
+                (ip6addr)->addr[2] = 0; \
+                (ip6addr)->addr[3] = PP_HTONL(0x00000001UL); \
+                ip6_addr_clear_zone(ip6addr); }while(0)
+
+#define ip6_addr_isallrouters_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
+    ((ip6addr)->addr[1] == 0UL) && \
+    ((ip6addr)->addr[2] == 0UL) && \
+    ((ip6addr)->addr[3] == PP_HTONL(0x00000002UL)))
+#define ip6_addr_set_allrouters_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \
+                (ip6addr)->addr[1] = 0; \
+                (ip6addr)->addr[2] = 0; \
+                (ip6addr)->addr[3] = PP_HTONL(0x00000002UL); \
+                ip6_addr_clear_zone(ip6addr); }while(0)
+
+#define ip6_addr_issolicitednode(ip6addr) ( ((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
+        ((ip6addr)->addr[2] == PP_HTONL(0x00000001UL)) && \
+        (((ip6addr)->addr[3] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL)) )
+
+#define ip6_addr_set_solicitednode(ip6addr, if_id) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \
+                (ip6addr)->addr[1] = 0; \
+                (ip6addr)->addr[2] = PP_HTONL(0x00000001UL); \
+                (ip6addr)->addr[3] = (PP_HTONL(0xff000000UL) | (if_id)); \
+                ip6_addr_clear_zone(ip6addr); }while(0)
+
+#define ip6_addr_cmp_solicitednode(ip6addr, sn_addr) ip6_addr_solicitednode_eq(ip6addr, sn_addr)
+#define ip6_addr_solicitednode_eq(ip6addr, sn_addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
+                                    ((ip6addr)->addr[1] == 0) && \
+                                    ((ip6addr)->addr[2] == PP_HTONL(0x00000001UL)) && \
+                                    ((ip6addr)->addr[3] == (PP_HTONL(0xff000000UL) | (sn_addr)->addr[3])))
+
+/* IPv6 address states. */
+#define IP6_ADDR_INVALID      0x00
+#define IP6_ADDR_TENTATIVE    0x08
+#define IP6_ADDR_TENTATIVE_1  0x09 /* 1 probe sent */
+#define IP6_ADDR_TENTATIVE_2  0x0a /* 2 probes sent */
+#define IP6_ADDR_TENTATIVE_3  0x0b /* 3 probes sent */
+#define IP6_ADDR_TENTATIVE_4  0x0c /* 4 probes sent */
+#define IP6_ADDR_TENTATIVE_5  0x0d /* 5 probes sent */
+#define IP6_ADDR_TENTATIVE_6  0x0e /* 6 probes sent */
+#define IP6_ADDR_TENTATIVE_7  0x0f /* 7 probes sent */
+#define IP6_ADDR_VALID        0x10 /* This bit marks an address as valid (preferred or deprecated) */
+#define IP6_ADDR_PREFERRED    0x30
+#define IP6_ADDR_DEPRECATED   0x10 /* Same as VALID (valid but not preferred) */
+#define IP6_ADDR_DUPLICATED   0x40 /* Failed DAD test, not valid */
+
+#define IP6_ADDR_TENTATIVE_COUNT_MASK 0x07 /* 1-7 probes sent */
+
+#define ip6_addr_isinvalid(addr_state) (addr_state == IP6_ADDR_INVALID)
+#define ip6_addr_istentative(addr_state) (addr_state & IP6_ADDR_TENTATIVE)
+#define ip6_addr_isvalid(addr_state) (addr_state & IP6_ADDR_VALID) /* Include valid, preferred, and deprecated. */
+#define ip6_addr_ispreferred(addr_state) (addr_state == IP6_ADDR_PREFERRED)
+#define ip6_addr_isdeprecated(addr_state) (addr_state == IP6_ADDR_DEPRECATED)
+#define ip6_addr_isduplicated(addr_state) (addr_state == IP6_ADDR_DUPLICATED)
+
+#if LWIP_IPV6_ADDRESS_LIFETIMES
+#define IP6_ADDR_LIFE_STATIC   (0)
+#define IP6_ADDR_LIFE_INFINITE (0xffffffffUL)
+#define ip6_addr_life_isstatic(addr_life) ((addr_life) == IP6_ADDR_LIFE_STATIC)
+#define ip6_addr_life_isinfinite(addr_life) ((addr_life) == IP6_ADDR_LIFE_INFINITE)
+#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */
+
+#define ip6_addr_debug_print_parts(debug, a, b, c, d, e, f, g, h) \
+  LWIP_DEBUGF(debug, ("%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F, \
+                      a, b, c, d, e, f, g, h))
+#define ip6_addr_debug_print(debug, ipaddr) \
+  ip6_addr_debug_print_parts(debug, \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK1(ipaddr) : 0),    \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK2(ipaddr) : 0),    \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK3(ipaddr) : 0),    \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK4(ipaddr) : 0),    \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK5(ipaddr) : 0),    \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK6(ipaddr) : 0),    \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK7(ipaddr) : 0),    \
+                      (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK8(ipaddr) : 0))
+#define ip6_addr_debug_print_val(debug, ipaddr) \
+  ip6_addr_debug_print_parts(debug, \
+                      IP6_ADDR_BLOCK1(&(ipaddr)),    \
+                      IP6_ADDR_BLOCK2(&(ipaddr)),    \
+                      IP6_ADDR_BLOCK3(&(ipaddr)),    \
+                      IP6_ADDR_BLOCK4(&(ipaddr)),    \
+                      IP6_ADDR_BLOCK5(&(ipaddr)),    \
+                      IP6_ADDR_BLOCK6(&(ipaddr)),    \
+                      IP6_ADDR_BLOCK7(&(ipaddr)),    \
+                      IP6_ADDR_BLOCK8(&(ipaddr)))
+
+#define IP6ADDR_STRLEN_MAX    46
+
+int ip6addr_aton(const char *cp, ip6_addr_t *addr);
+/** returns ptr to static buffer; not reentrant! */
+char *ip6addr_ntoa(const ip6_addr_t *addr);
+char *ip6addr_ntoa_r(const ip6_addr_t *addr, char *buf, int buflen);
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV6 */
+
+#endif /* LWIP_HDR_IP6_ADDR_H */

src/lwip/include/lwip/ip6_frag.h

@@ -0,0 +1,144 @@
+/**
+ * @file
+ *
+ * IPv6 fragmentation and reassembly.
+ */
+
+/*
+ * Copyright (c) 2010 Inico Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Ivan Delamer <delamer@inicotech.com>
+ *
+ *
+ * Please coordinate changes and requests with Ivan Delamer
+ * <delamer@inicotech.com>
+ */
+#ifndef LWIP_HDR_IP6_FRAG_H
+#define LWIP_HDR_IP6_FRAG_H
+
+#include "lwip/opt.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip6_addr.h"
+#include "lwip/ip6.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#if LWIP_IPV6 && LWIP_IPV6_REASS  /* don't build if not configured for use in lwipopts.h */
+
+/** The IPv6 reassembly timer interval in milliseconds. */
+#define IP6_REASS_TMR_INTERVAL 1000
+
+/** IP6_FRAG_COPYHEADER==1: for platforms where sizeof(void*) > 4, "struct
+ * ip6_reass_helper" is too large to be stored in the IPv6 fragment header, and
+ * will bleed into the header before it, which may be the IPv6 header or an
+ * extension header. This means that for each first fragment packet, we need to
+ * 1) make a copy of some IPv6 header fields (src+dest) that we need later on,
+ * just in case we do overwrite part of the IPv6 header, and 2) make a copy of
+ * the header data that we overwrote, so that we can restore it before either
+ * completing reassembly or sending an ICMPv6 reply. The last part is true even
+ * if this setting is disabled, but if it is enabled, we need to save a bit
+ * more data (up to the size of a pointer) because we overwrite more. */
+#ifndef IPV6_FRAG_COPYHEADER
+#define IPV6_FRAG_COPYHEADER   0
+#endif
+
+/* With IPV6_FRAG_COPYHEADER==1, a helper structure may (or, depending on the
+ * presence of extensions, may not) overwrite part of the IP header. Therefore,
+ * we copy the fields that we need from the IP header for as long as the helper
+ * structure may still be in place. This is easier than temporarily restoring
+ * those fields in the IP header each time we need to perform checks on them. */
+#if IPV6_FRAG_COPYHEADER
+#define IPV6_FRAG_SRC(ipr) ((ipr)->src)
+#define IPV6_FRAG_DEST(ipr) ((ipr)->dest)
+#else /* IPV6_FRAG_COPYHEADER */
+#define IPV6_FRAG_SRC(ipr) ((ipr)->iphdr->src)
+#define IPV6_FRAG_DEST(ipr) ((ipr)->iphdr->dest)
+#endif /* IPV6_FRAG_COPYHEADER */
+
+/** IPv6 reassembly helper struct.
+ * This is exported because memp needs to know the size.
+ */
+struct ip6_reassdata {
+  struct ip6_reassdata *next;
+  struct pbuf *p;
+  struct ip6_hdr *iphdr; /* pointer to the first (original) IPv6 header */
+#if IPV6_FRAG_COPYHEADER
+  ip6_addr_p_t src; /* copy of the source address in the IP header */
+  ip6_addr_p_t dest; /* copy of the destination address in the IP header */
+  /* This buffer (for the part of the original header that we overwrite) will
+   * be slightly oversized, but we cannot compute the exact size from here. */
+  u8_t orig_hdr[sizeof(struct ip6_frag_hdr) + sizeof(void*)];
+#else /* IPV6_FRAG_COPYHEADER */
+  /* In this case we still need the buffer, for sending ICMPv6 replies. */
+  u8_t orig_hdr[sizeof(struct ip6_frag_hdr)];
+#endif /* IPV6_FRAG_COPYHEADER */
+  u32_t identification;
+  u16_t datagram_len;
+  u8_t nexth;
+  u8_t timer;
+#if LWIP_IPV6_SCOPES
+  u8_t src_zone; /* zone of original packet's source address */
+  u8_t dest_zone; /* zone of original packet's destination address */
+#endif /* LWIP_IPV6_SCOPES */
+};
+
+#define ip6_reass_init() /* Compatibility define */
+void ip6_reass_tmr(void);
+struct pbuf *ip6_reass(struct pbuf *p);
+
+#endif /* LWIP_IPV6 && LWIP_IPV6_REASS */
+
+#if LWIP_IPV6 && LWIP_IPV6_FRAG  /* don't build if not configured for use in lwipopts.h */
+
+#ifndef LWIP_PBUF_CUSTOM_REF_DEFINED
+#define LWIP_PBUF_CUSTOM_REF_DEFINED
+/** A custom pbuf that holds a reference to another pbuf, which is freed
+ * when this custom pbuf is freed. This is used to create a custom PBUF_REF
+ * that points into the original pbuf. */
+struct pbuf_custom_ref {
+  /** 'base class' */
+  struct pbuf_custom pc;
+  /** pointer to the original pbuf that is referenced */
+  struct pbuf *original;
+};
+#endif /* LWIP_PBUF_CUSTOM_REF_DEFINED */
+
+err_t ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest);
+
+#endif /* LWIP_IPV6 && LWIP_IPV6_FRAG */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_IP6_FRAG_H */

src/lwip/include/lwip/ip6_zone.h

@@ -0,0 +1,306 @@
+/**
+ * @file
+ *
+ * IPv6 address scopes, zones, and scoping policy.
+ *
+ * This header provides the means to implement support for IPv6 address scopes,
+ * as per RFC 4007. An address scope can be either global or more constrained.
+ * In lwIP, we say that an address "has a scope" or "is scoped" when its scope
+ * is constrained, in which case the address is meaningful only in a specific
+ * "zone." For unicast addresses, only link-local addresses have a scope; in
+ * that case, the scope is the link. For multicast addresses, there are various
+ * scopes defined by RFC 4007 and others. For any constrained scope, a system
+ * must establish a (potentially one-to-many) mapping between zones and local
+ * interfaces. For example, a link-local address is valid on only one link (its
+ * zone). That link may be attached to one or more local interfaces. The
+ * decisions on which scopes are constrained and the mapping between zones and
+ * interfaces is together what we refer to as the "scoping policy" - more on
+ * this in a bit.
+ *
+ * In lwIP, each IPv6 address has an associated zone index. This zone index may
+ * be set to "no zone" (IP6_NO_ZONE, 0) or an actual zone. We say that an
+ * address "has a zone" or "is zoned" when its zone index is *not* set to "no
+ * zone." In lwIP, in principle, each address should be "properly zoned," which
+ * means that if the address has a zone if and only if has a scope. As such, it
+ * is a rule that an unscoped (e.g., global) address must never have a zone.
+ * Even though one could argue that there is always one zone even for global
+ * scopes, this rule exists for implementation simplicity. Violation of the
+ * rule will trigger assertions or otherwise result in undesired behavior.
+ *
+ * Backward compatibility prevents us from requiring that applications always
+ * provide properly zoned addresses. We do enforce the rule that the in the
+ * lwIP link layer (everything below netif->output_ip6() and in particular ND6)
+ * *all* addresses are properly zoned. Thus, on the output paths down the
+ * stack, various places deal with the case of addresses that lack a zone.
+ * Some of them are best-effort for efficiency (e.g. the PCB bind and connect
+ * API calls' attempts to add missing zones); ultimately the IPv6 output
+ * handler (@ref ip6_output_if_src) will set a zone if necessary.
+ *
+ * Aside from dealing with scoped addresses lacking a zone, a proper IPv6
+ * implementation must also ensure that a packet with a scoped source and/or
+ * destination address does not leave its zone. This is currently implemented
+ * in the input and forward functions. However, for output, these checks are
+ * deliberately omitted in order to keep the implementation lightweight. The
+ * routing algorithm in @ref ip6_route will take decisions such that it will
+ * not cause zone violations unless the application sets bad addresses, though.
+ *
+ * In terms of scoping policy, lwIP implements the default policy from RFC 4007
+ * using macros in this file. This policy considers link-local unicast
+ * addresses and (only) interface-local and link-local multicast addresses as
+ * having a scope. For all these addresses, the zone is equal to the interface.
+ * As shown below in this file, it is possible to implement a custom policy.
+ */
+
+/*
+ * Copyright (c) 2017 The MINIX 3 Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: David van Moolenbroek <david@minix3.org>
+ *
+ */
+#ifndef LWIP_HDR_IP6_ZONE_H
+#define LWIP_HDR_IP6_ZONE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup ip6_zones IPv6 Zones
+ * @ingroup ip6
+ * @{
+ */
+
+#if LWIP_IPV6  /* don't build if not configured for use in lwipopts.h */
+
+/** Identifier for "no zone". */
+#define IP6_NO_ZONE 0
+
+#if LWIP_IPV6_SCOPES
+
+/** Zone initializer for static IPv6 address initialization, including comma. */
+#define IPADDR6_ZONE_INIT , IP6_NO_ZONE
+
+/** Return the zone index of the given IPv6 address; possibly "no zone". */
+#define ip6_addr_zone(ip6addr) ((ip6addr)->zone)
+
+/** Does the given IPv6 address have a zone set? (0/1) */
+#define ip6_addr_has_zone(ip6addr) (ip6_addr_zone(ip6addr) != IP6_NO_ZONE)
+
+/** Set the zone field of an IPv6 address to a particular value. */
+#define ip6_addr_set_zone(ip6addr, zone_idx) ((ip6addr)->zone = (zone_idx))
+
+/** Clear the zone field of an IPv6 address, setting it to "no zone". */
+#define ip6_addr_clear_zone(ip6addr) ((ip6addr)->zone = IP6_NO_ZONE)
+
+/** Copy the zone field from the second IPv6 address to the first one. */
+#define ip6_addr_copy_zone(ip6addr1, ip6addr2) ((ip6addr1).zone = (ip6addr2).zone)
+
+/** Is the zone field of the given IPv6 address equal to the given zone index? (0/1) */
+#define ip6_addr_equals_zone(ip6addr, zone_idx) ((ip6addr)->zone == (zone_idx))
+
+/** @deprecated Renamed to @ref ip6_addr_zone_eq */
+#define ip6_addr_cmp_zone(addr1, addr2) ip6_addr_zone_eq(ip6addr1, ip6addr2)
+/** Are the zone fields of the given IPv6 addresses equal? (0/1)
+ * This macro must only be used on IPv6 addresses of the same scope. */
+#define ip6_addr_zone_eq(ip6addr1, ip6addr2) ((ip6addr1)->zone == (ip6addr2)->zone)
+
+/** Symbolic constants for the 'type' parameters in some of the macros.
+ * These exist for efficiency only, allowing the macros to avoid certain tests
+ * when the address is known not to be of a certain type. Dead code elimination
+ * will do the rest. IP6_MULTICAST is supported but currently not optimized.
+ * @see ip6_addr_has_scope, ip6_addr_assign_zone, ip6_addr_lacks_zone.
+ */
+enum lwip_ipv6_scope_type
+{
+  /** Unknown */
+  IP6_UNKNOWN   = 0,
+  /** Unicast */
+  IP6_UNICAST   = 1,
+  /** Multicast */
+  IP6_MULTICAST = 2
+};
+
+/** IPV6_CUSTOM_SCOPES: together, the following three macro definitions,
+ * @ref ip6_addr_has_scope, @ref ip6_addr_assign_zone, and
+ * @ref ip6_addr_test_zone, completely define the lwIP scoping policy.
+ * The definitions below implement the default policy from RFC 4007 Sec. 6.
+ * Should an implementation desire to implement a different policy, it can
+ * define IPV6_CUSTOM_SCOPES to 1 and supply its own definitions for the three
+ * macros instead.
+ */
+#ifndef IPV6_CUSTOM_SCOPES
+#define IPV6_CUSTOM_SCOPES 0
+#endif /* !IPV6_CUSTOM_SCOPES */
+
+#if !IPV6_CUSTOM_SCOPES
+
+/**
+ * Determine whether an IPv6 address has a constrained scope, and as such is
+ * meaningful only if accompanied by a zone index to identify the scope's zone.
+ * The given address type may be used to eliminate at compile time certain
+ * checks that will evaluate to false at run time anyway.
+ *
+ * This default implementation follows the default model of RFC 4007, where
+ * only interface-local and link-local scopes are defined.
+ *
+ * Even though the unicast loopback address does have an implied link-local
+ * scope, in this implementation it does not have an explicitly assigned zone
+ * index. As such it should not be tested for in this macro.
+ *
+ * @param ip6addr the IPv6 address (const); only its address part is examined.
+ * @param type address type; see @ref lwip_ipv6_scope_type.
+ * @return 1 if the address has a constrained scope, 0 if it does not.
+ */
+#define ip6_addr_has_scope(ip6addr, type) \
+  (ip6_addr_islinklocal(ip6addr) || (((type) != IP6_UNICAST) && \
+   (ip6_addr_ismulticast_iflocal(ip6addr) || \
+    ip6_addr_ismulticast_linklocal(ip6addr))))
+
+/**
+ * Assign a zone index to an IPv6 address, based on a network interface. If the
+ * given address has a scope, the assigned zone index is that scope's zone of
+ * the given netif; otherwise, the assigned zone index is "no zone".
+ *
+ * This default implementation follows the default model of RFC 4007, where
+ * only interface-local and link-local scopes are defined, and the zone index
+ * of both of those scopes always equals the index of the network interface.
+ * As such, this default implementation need not distinguish between different
+ * constrained scopes when assigning the zone.
+ *
+ * @param ip6addr the IPv6 address; its address part is examined, and its zone
+ *                index is assigned.
+ * @param type address type; see @ref lwip_ipv6_scope_type.
+ * @param netif the network interface (const).
+ */
+#define ip6_addr_assign_zone(ip6addr, type, netif) \
+    (ip6_addr_set_zone((ip6addr), \
+      ip6_addr_has_scope((ip6addr), (type)) ? netif_get_index(netif) : 0))
+
+/**
+ * Test whether an IPv6 address is "zone-compatible" with a network interface.
+ * That is, test whether the network interface is part of the zone associated
+ * with the address. For efficiency, this macro is only ever called if the
+ * given address is either scoped or zoned, and thus, it need not test this.
+ * If an address is scoped but not zoned, or zoned and not scoped, it is
+ * considered not zone-compatible with any netif.
+ *
+ * This default implementation follows the default model of RFC 4007, where
+ * only interface-local and link-local scopes are defined, and the zone index
+ * of both of those scopes always equals the index of the network interface.
+ * As such, there is always only one matching netif for a specific zone index,
+ * but all call sites of this macro currently support multiple matching netifs
+ * as well (at no additional expense in the common case).
+ *
+ * @param ip6addr the IPv6 address (const).
+ * @param netif the network interface (const).
+ * @return 1 if the address is scope-compatible with the netif, 0 if not.
+ */
+#define ip6_addr_test_zone(ip6addr, netif) \
+    (ip6_addr_equals_zone((ip6addr), netif_get_index(netif)))
+
+#endif /* !IPV6_CUSTOM_SCOPES */
+
+/** Does the given IPv6 address have a scope, and as such should also have a
+ * zone to be meaningful, but does not actually have a zone? (0/1) */
+#define ip6_addr_lacks_zone(ip6addr, type) \
+    (!ip6_addr_has_zone(ip6addr) && ip6_addr_has_scope((ip6addr), (type)))
+
+/**
+ * Try to select a zone for a scoped address that does not yet have a zone.
+ * Called from PCB bind and connect routines, for two reasons: 1) to save on
+ * this (relatively expensive) selection for every individual packet route
+ * operation and 2) to allow the application to obtain the selected zone from
+ * the PCB as is customary for e.g. getsockname/getpeername BSD socket calls.
+ *
+ * Ideally, callers would always supply a properly zoned address, in which case
+ * this function would not be needed. It exists both for compatibility with the
+ * BSD socket API (which accepts zoneless destination addresses) and for
+ * backward compatibility with pre-scoping lwIP code.
+ *
+ * It may be impossible to select a zone, e.g. if there are no netifs.  In that
+ * case, the address's zone field will be left as is.
+ *
+ * @param dest the IPv6 address for which to select and set a zone.
+ * @param src source IPv6 address (const); may be equal to dest.
+ */
+#define ip6_addr_select_zone(dest, src) do { struct netif *selected_netif; \
+  selected_netif = ip6_route((src), (dest)); \
+  if (selected_netif != NULL) { \
+    ip6_addr_assign_zone((dest), IP6_UNKNOWN, selected_netif); \
+  } } while (0)
+
+/**
+ * @}
+ */
+
+#else /* LWIP_IPV6_SCOPES */
+
+#define IPADDR6_ZONE_INIT
+#define ip6_addr_zone(ip6addr) (IP6_NO_ZONE)
+#define ip6_addr_has_zone(ip6addr) (0)
+#define ip6_addr_set_zone(ip6addr, zone_idx)
+#define ip6_addr_clear_zone(ip6addr)
+#define ip6_addr_copy_zone(ip6addr1, ip6addr2)
+#define ip6_addr_equals_zone(ip6addr, zone_idx) (1)
+#define ip6_addr_zone_eq(ip6addr1, ip6addr2) (1)
+#define IPV6_CUSTOM_SCOPES 0
+#define ip6_addr_has_scope(ip6addr, type) (0)
+#define ip6_addr_assign_zone(ip6addr, type, netif)
+#define ip6_addr_test_zone(ip6addr, netif) (1)
+#define ip6_addr_lacks_zone(ip6addr, type) (0)
+#define ip6_addr_select_zone(ip6addr, src)
+
+#endif /* LWIP_IPV6_SCOPES */
+
+#if LWIP_IPV6_SCOPES && LWIP_IPV6_SCOPES_DEBUG
+
+/** Verify that the given IPv6 address is properly zoned. */
+#define IP6_ADDR_ZONECHECK(ip6addr) LWIP_ASSERT("IPv6 zone check failed", \
+    ip6_addr_has_scope(ip6addr, IP6_UNKNOWN) == ip6_addr_has_zone(ip6addr))
+
+/** Verify that the given IPv6 address is properly zoned for the given netif. */
+#define IP6_ADDR_ZONECHECK_NETIF(ip6addr, netif) LWIP_ASSERT("IPv6 netif zone check failed", \
+    ip6_addr_has_scope(ip6addr, IP6_UNKNOWN) ? \
+    (ip6_addr_has_zone(ip6addr) && \
+     (((netif) == NULL) || ip6_addr_test_zone((ip6addr), (netif)))) : \
+    !ip6_addr_has_zone(ip6addr))
+
+#else /* LWIP_IPV6_SCOPES && LWIP_IPV6_SCOPES_DEBUG */
+
+#define IP6_ADDR_ZONECHECK(ip6addr)
+#define IP6_ADDR_ZONECHECK_NETIF(ip6addr, netif)
+
+#endif /* LWIP_IPV6_SCOPES && LWIP_IPV6_SCOPES_DEBUG */
+
+#endif /* LWIP_IPV6 */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_IP6_ZONE_H */

src/lwip/include/lwip/ip_addr.h

@@ -0,0 +1,468 @@
+/**
+ * @file
+ * IP address API (common IPv4 and IPv6)
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_IP_ADDR_H
+#define LWIP_HDR_IP_ADDR_H
+
+#include "lwip/opt.h"
+#include "lwip/def.h"
+
+#include "lwip/ip4_addr.h"
+#include "lwip/ip6_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @ingroup ipaddr
+ * IP address types for use in ip_addr_t.type member.
+ * @see tcp_new_ip_type(), udp_new_ip_type(), raw_new_ip_type().
+ */
+enum lwip_ip_addr_type {
+  /** IPv4 */
+  IPADDR_TYPE_V4 =   0U,
+  /** IPv6 */
+  IPADDR_TYPE_V6 =   6U,
+  /** IPv4+IPv6 ("dual-stack") */
+  IPADDR_TYPE_ANY = 46U
+};
+
+#if LWIP_IPV4 && LWIP_IPV6
+/**
+ * @ingroup ipaddr
+ * A union struct for both IP version's addresses.
+ * ATTENTION: watch out for its size when adding IPv6 address scope!
+ */
+typedef struct ip_addr {
+  union {
+    ip6_addr_t ip6;
+    ip4_addr_t ip4;
+  } u_addr;
+  /** @ref lwip_ip_addr_type */
+  u8_t type;
+} ip_addr_t;
+
+extern const ip_addr_t ip_addr_any_type;
+
+/** @ingroup ip4addr */
+#define IPADDR4_INIT(u32val)          { { { { u32val, 0ul, 0ul, 0ul } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_V4 }
+/** @ingroup ip4addr */
+#define IPADDR4_INIT_BYTES(a,b,c,d)   IPADDR4_INIT(PP_HTONL(LWIP_MAKEU32(a,b,c,d)))
+
+/** @ingroup ip6addr */
+#define IPADDR6_INIT(a, b, c, d)      { { { { a, b, c, d } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_V6 }
+/** @ingroup ip6addr */
+#define IPADDR6_INIT_HOST(a, b, c, d) { { { { PP_HTONL(a), PP_HTONL(b), PP_HTONL(c), PP_HTONL(d) } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_V6 }
+
+/** @ingroup ipaddr */
+#define IP_IS_ANY_TYPE_VAL(ipaddr)    (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_ANY)
+/** @ingroup ipaddr */
+#define IPADDR_ANY_TYPE_INIT          { { { { 0ul, 0ul, 0ul, 0ul } IPADDR6_ZONE_INIT } }, IPADDR_TYPE_ANY }
+
+/** @ingroup ip4addr */
+#define IP_IS_V4_VAL(ipaddr)          (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_V4)
+/** @ingroup ip6addr */
+#define IP_IS_V6_VAL(ipaddr)          (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_V6)
+/** @ingroup ip4addr */
+#define IP_IS_V4(ipaddr)              (((ipaddr) == NULL) || IP_IS_V4_VAL(*(ipaddr)))
+/** @ingroup ip6addr */
+#define IP_IS_V6(ipaddr)              (((ipaddr) != NULL) && IP_IS_V6_VAL(*(ipaddr)))
+
+#define IP_SET_TYPE_VAL(ipaddr, iptype) do { (ipaddr).type = (iptype); }while(0)
+#define IP_SET_TYPE(ipaddr, iptype)     do { if((ipaddr) != NULL) { IP_SET_TYPE_VAL(*(ipaddr), iptype); }}while(0)
+#define IP_GET_TYPE(ipaddr)           ((ipaddr)->type)
+
+#define IP_ADDR_RAW_SIZE(ipaddr)      (IP_GET_TYPE(&ipaddr) == IPADDR_TYPE_V4 ? sizeof(ip4_addr_t) : sizeof(ip6_addr_t))
+
+#define IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ipaddr) (IP_GET_TYPE(&pcb->local_ip) == IP_GET_TYPE(ipaddr))
+#define IP_ADDR_PCB_VERSION_MATCH(pcb, ipaddr) (IP_IS_ANY_TYPE_VAL(pcb->local_ip) || IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ipaddr))
+
+/** @ingroup ip6addr
+ * Convert generic ip address to specific protocol version
+ */
+#define ip_2_ip6(ipaddr)   (&((ipaddr)->u_addr.ip6))
+/** @ingroup ip4addr
+ * Convert generic ip address to specific protocol version
+ */
+#define ip_2_ip4(ipaddr)   (&((ipaddr)->u_addr.ip4))
+
+/** @ingroup ip4addr */
+#define IP_ADDR4(ipaddr,a,b,c,d)      do { IP4_ADDR(ip_2_ip4(ipaddr),a,b,c,d); \
+                                           IP_SET_TYPE_VAL(*(ipaddr), IPADDR_TYPE_V4); } while(0)
+/** @ingroup ip6addr */
+#define IP_ADDR6(ipaddr,i0,i1,i2,i3)  do { IP6_ADDR(ip_2_ip6(ipaddr),i0,i1,i2,i3); \
+                                           IP_SET_TYPE_VAL(*(ipaddr), IPADDR_TYPE_V6); } while(0)
+/** @ingroup ip6addr */
+#define IP_ADDR6_HOST(ipaddr,i0,i1,i2,i3)  IP_ADDR6(ipaddr,PP_HTONL(i0),PP_HTONL(i1),PP_HTONL(i2),PP_HTONL(i3))
+
+#define ip_clear_no4(ipaddr)  do { ip_2_ip6(ipaddr)->addr[1] = \
+                                   ip_2_ip6(ipaddr)->addr[2] = \
+                                   ip_2_ip6(ipaddr)->addr[3] = 0; \
+                                   ip6_addr_clear_zone(ip_2_ip6(ipaddr)); }while(0)
+
+/** @ingroup ipaddr */
+#define ip_addr_copy(dest, src)      do{ IP_SET_TYPE_VAL(dest, IP_GET_TYPE(&src)); if(IP_IS_V6_VAL(src)){ \
+  ip6_addr_copy(*ip_2_ip6(&(dest)), *ip_2_ip6(&(src))); }else{ \
+  ip4_addr_copy(*ip_2_ip4(&(dest)), *ip_2_ip4(&(src))); ip_clear_no4(&dest); }}while(0)
+/** @ingroup ip6addr */
+#define ip_addr_copy_from_ip6(dest, src)      do{ \
+  ip6_addr_copy(*ip_2_ip6(&(dest)), src); IP_SET_TYPE_VAL(dest, IPADDR_TYPE_V6); }while(0)
+/** @ingroup ip6addr */
+#define ip_addr_copy_from_ip6_packed(dest, src)      do{ \
+  ip6_addr_copy_from_packed(*ip_2_ip6(&(dest)), src); IP_SET_TYPE_VAL(dest, IPADDR_TYPE_V6); }while(0)
+/** @ingroup ip4addr */
+#define ip_addr_copy_from_ip4(dest, src)      do{ \
+  ip4_addr_copy(*ip_2_ip4(&(dest)), src); IP_SET_TYPE_VAL(dest, IPADDR_TYPE_V4); ip_clear_no4(&dest); }while(0)
+/** @ingroup ip4addr */
+#define ip_addr_set_ip4_u32(ipaddr, val)  do{if(ipaddr){ip4_addr_set_u32(ip_2_ip4(ipaddr), val); \
+  IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0)
+/** @ingroup ip4addr */
+#define ip_addr_set_ip4_u32_val(ipaddr, val)  do{ ip4_addr_set_u32(ip_2_ip4(&(ipaddr)), val); \
+  IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(&ipaddr); }while(0)
+/** @ingroup ip4addr */
+#define ip_addr_get_ip4_u32(ipaddr)  (((ipaddr) && IP_IS_V4(ipaddr)) ? \
+  ip4_addr_get_u32(ip_2_ip4(ipaddr)) : 0)
+/** @ingroup ipaddr */
+#define ip_addr_set(dest, src) do{ IP_SET_TYPE(dest, IP_GET_TYPE(src)); if(IP_IS_V6(src)){ \
+  ip6_addr_set(ip_2_ip6(dest), ip_2_ip6(src)); }else{ \
+  ip4_addr_set(ip_2_ip4(dest), ip_2_ip4(src)); ip_clear_no4(dest); }}while(0)
+/** @ingroup ipaddr */
+#define ip_addr_set_ipaddr(dest, src) ip_addr_set(dest, src)
+/** @ingroup ipaddr */
+#define ip_addr_set_zero(ipaddr)     do{ \
+  ip6_addr_set_zero(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, 0); }while(0)
+/** @ingroup ip5addr */
+#define ip_addr_set_zero_ip4(ipaddr)     do{ \
+  ip6_addr_set_zero(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); }while(0)
+/** @ingroup ip6addr */
+#define ip_addr_set_zero_ip6(ipaddr)     do{ \
+  ip6_addr_set_zero(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V6); }while(0)
+/** @ingroup ipaddr */
+#define ip_addr_set_any(is_ipv6, ipaddr)      do{if(is_ipv6){ \
+  ip6_addr_set_any(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V6); }else{ \
+  ip4_addr_set_any(ip_2_ip4(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0)
+/** @ingroup ipaddr */
+#define ip_addr_set_any_val(is_ipv6, ipaddr)      do{if(is_ipv6){ \
+  ip6_addr_set_any(ip_2_ip6(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V6); }else{ \
+  ip4_addr_set_any(ip_2_ip4(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(&ipaddr); }}while(0)
+/** @ingroup ipaddr */
+#define ip_addr_set_loopback(is_ipv6, ipaddr) do{if(is_ipv6){ \
+  ip6_addr_set_loopback(ip_2_ip6(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V6); }else{ \
+  ip4_addr_set_loopback(ip_2_ip4(ipaddr)); IP_SET_TYPE(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0)
+/** @ingroup ipaddr */
+#define ip_addr_set_loopback_val(is_ipv6, ipaddr) do{if(is_ipv6){ \
+  ip6_addr_set_loopback(ip_2_ip6(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V6); }else{ \
+  ip4_addr_set_loopback(ip_2_ip4(&(ipaddr))); IP_SET_TYPE_VAL(ipaddr, IPADDR_TYPE_V4); ip_clear_no4(&ipaddr); }}while(0)
+/** @ingroup ipaddr */
+#define ip_addr_set_hton(dest, src)  do{if(IP_IS_V6(src)){ \
+  ip6_addr_set_hton(ip_2_ip6(dest), ip_2_ip6(src)); IP_SET_TYPE(dest, IPADDR_TYPE_V6); }else{ \
+  ip4_addr_set_hton(ip_2_ip4(dest), ip_2_ip4(src)); IP_SET_TYPE(dest, IPADDR_TYPE_V4); ip_clear_no4(ipaddr); }}while(0)
+/** @ingroup ipaddr */
+#define ip_addr_get_network(target, host, netmask) do{if(IP_IS_V6(host)){ \
+  ip4_addr_set_zero(ip_2_ip4(target)); IP_SET_TYPE(target, IPADDR_TYPE_V6); } else { \
+  ip4_addr_get_network(ip_2_ip4(target), ip_2_ip4(host), ip_2_ip4(netmask)); IP_SET_TYPE(target, IPADDR_TYPE_V4); }}while(0)
+/**
+ * @ingroup ipaddr
+ * @deprecated Renamed to @ref ip_addr_net_eq
+ */
+#define ip_addr_netcmp(addr1, addr2, mask) ip_addr_net_eq((addr1), (addr2), (mask))
+/** @ingroup ipaddr
+ *  Check if two ip addresses are share the same network, for a specific netmask. */
+#define ip_addr_net_eq(addr1, addr2, mask) ((IP_IS_V6(addr1) && IP_IS_V6(addr2)) ? \
+  0 : \
+  ip4_addr_net_eq(ip_2_ip4(addr1), ip_2_ip4(addr2), mask))
+/**
+ * @ingroup ipaddr
+ * @deprecated Renamed to @ref ip_addr_eq
+ */
+#define ip_addr_cmp(addr1, addr2) ip_addr_eq((addr1), (addr2))
+/** @ingroup ipaddr
+ *  Check if two ip addresses are equal. */
+#define ip_addr_eq(addr1, addr2)    ((IP_GET_TYPE(addr1) != IP_GET_TYPE(addr2)) ? 0 : (IP_IS_V6_VAL(*(addr1)) ? \
+  ip6_addr_eq(ip_2_ip6(addr1), ip_2_ip6(addr2)) : \
+  ip4_addr_eq(ip_2_ip4(addr1), ip_2_ip4(addr2))))
+/**
+ * @ingroup ipaddr
+ * @deprecated Renamed to @ref ip_addr_zoneless_eq
+ */
+#define ip_addr_cmp_zoneless(addr1, addr2) ip_addr_zoneless_eq((addr1), (addr2))
+/** @ingroup ipaddr
+ *  Check if two ip addresses are equal, ignoring the zone. */
+#define ip_addr_zoneless_eq(addr1, addr2)    ((IP_GET_TYPE(addr1) != IP_GET_TYPE(addr2)) ? 0 : (IP_IS_V6_VAL(*(addr1)) ? \
+  ip6_addr_zoneless_eq(ip_2_ip6(addr1), ip_2_ip6(addr2)) : \
+  ip4_addr_eq(ip_2_ip4(addr1), ip_2_ip4(addr2))))
+/** @ingroup ipaddr
+ *  Check if an ip address is the 'any' address. */
+#define ip_addr_isany(ipaddr)        (((ipaddr) == NULL) ? 1 : ((IP_IS_V6(ipaddr)) ? \
+  ip6_addr_isany(ip_2_ip6(ipaddr)) : \
+  ip4_addr_isany(ip_2_ip4(ipaddr))))
+/** @ingroup ipaddr
+ *  Check if an ip address is the 'any' address, by value. */
+#define ip_addr_isany_val(ipaddr)        ((IP_IS_V6_VAL(ipaddr)) ? \
+  ip6_addr_isany_val(*ip_2_ip6(&(ipaddr))) : \
+  ip4_addr_isany_val(*ip_2_ip4(&(ipaddr))))
+/** @ingroup ipaddr
+ *  Check if an ip address is a broadcast address. */
+#define ip_addr_isbroadcast(ipaddr, netif) ((IP_IS_V6(ipaddr)) ? \
+  0 : \
+  ip4_addr_isbroadcast(ip_2_ip4(ipaddr), netif))
+/** @ingroup ipaddr
+ *  Check inf an ip address is a multicast address. */
+#define ip_addr_ismulticast(ipaddr)  ((IP_IS_V6(ipaddr)) ? \
+  ip6_addr_ismulticast(ip_2_ip6(ipaddr)) : \
+  ip4_addr_ismulticast(ip_2_ip4(ipaddr)))
+/** @ingroup ipaddr
+ *  Check inf an ip address is a loopback address. */
+#define ip_addr_isloopback(ipaddr)  ((IP_IS_V6(ipaddr)) ? \
+  ip6_addr_isloopback(ip_2_ip6(ipaddr)) : \
+  ip4_addr_isloopback(ip_2_ip4(ipaddr)))
+/** @ingroup ipaddr
+ *  Check inf an ip address is a link-local address. */
+#define ip_addr_islinklocal(ipaddr)  ((IP_IS_V6(ipaddr)) ? \
+  ip6_addr_islinklocal(ip_2_ip6(ipaddr)) : \
+  ip4_addr_islinklocal(ip_2_ip4(ipaddr)))
+#define ip_addr_debug_print(debug, ipaddr) do { if(IP_IS_V6(ipaddr)) { \
+  ip6_addr_debug_print(debug, ip_2_ip6(ipaddr)); } else { \
+  ip4_addr_debug_print(debug, ip_2_ip4(ipaddr)); }}while(0)
+#define ip_addr_debug_print_val(debug, ipaddr) do { if(IP_IS_V6_VAL(ipaddr)) { \
+  ip6_addr_debug_print_val(debug, *ip_2_ip6(&(ipaddr))); } else { \
+  ip4_addr_debug_print_val(debug, *ip_2_ip4(&(ipaddr))); }}while(0)
+char *ipaddr_ntoa(const ip_addr_t *addr);
+char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen);
+int ipaddr_aton(const char *cp, ip_addr_t *addr);
+
+/** @ingroup ipaddr */
+#define IPADDR_STRLEN_MAX   IP6ADDR_STRLEN_MAX
+
+/** @ingroup ipaddr */
+#define ip4_2_ipv4_mapped_ipv6(ip6addr, ip4addr) do { \
+  (ip6addr)->addr[3] = (ip4addr)->addr; \
+  (ip6addr)->addr[2] = PP_HTONL(0x0000FFFFUL); \
+  (ip6addr)->addr[1] = 0; \
+  (ip6addr)->addr[0] = 0; \
+  ip6_addr_clear_zone(ip6addr); } while(0);
+
+/** @ingroup ipaddr */
+#define unmap_ipv4_mapped_ipv6(ip4addr, ip6addr) \
+  (ip4addr)->addr = (ip6addr)->addr[3];
+
+#define IP46_ADDR_ANY(type) (((type) == IPADDR_TYPE_V6)? IP6_ADDR_ANY : IP4_ADDR_ANY)
+
+#else /* LWIP_IPV4 && LWIP_IPV6 */
+
+#define IP_ADDR_PCB_VERSION_MATCH(addr, pcb)          1
+#define IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ipaddr)  1
+
+#define ip_addr_set_any_val(is_ipv6, ipaddr)          ip_addr_set_any(is_ipv6, &(ipaddr))
+#define ip_addr_set_loopback_val(is_ipv6, ipaddr)     ip_addr_set_loopback(is_ipv6, &(ipaddr))
+
+#if LWIP_IPV4
+
+typedef ip4_addr_t ip_addr_t;
+#define IPADDR4_INIT(u32val)                    { u32val }
+#define IPADDR4_INIT_BYTES(a,b,c,d)             IPADDR4_INIT(PP_HTONL(LWIP_MAKEU32(a,b,c,d)))
+#define IP_IS_V4_VAL(ipaddr)                    1
+#define IP_IS_V6_VAL(ipaddr)                    0
+#define IP_IS_V4(ipaddr)                        1
+#define IP_IS_V6(ipaddr)                        0
+#define IP_IS_ANY_TYPE_VAL(ipaddr)              0
+#define IP_SET_TYPE_VAL(ipaddr, iptype)
+#define IP_SET_TYPE(ipaddr, iptype)
+#define IP_GET_TYPE(ipaddr)                     IPADDR_TYPE_V4
+#define IP_ADDR_RAW_SIZE(ipaddr)                sizeof(ip4_addr_t)
+#define ip_2_ip4(ipaddr)                        (ipaddr)
+#define IP_ADDR4(ipaddr,a,b,c,d)                IP4_ADDR(ipaddr,a,b,c,d)
+
+#define ip_addr_copy(dest, src)                 ip4_addr_copy(dest, src)
+#define ip_addr_copy_from_ip4(dest, src)        ip4_addr_copy(dest, src)
+#define ip_addr_set_ip4_u32(ipaddr, val)        ip4_addr_set_u32(ip_2_ip4(ipaddr), val)
+#define ip_addr_set_ip4_u32_val(ipaddr, val)    ip_addr_set_ip4_u32(&(ipaddr), val)
+#define ip_addr_get_ip4_u32(ipaddr)             ip4_addr_get_u32(ip_2_ip4(ipaddr))
+#define ip_addr_set(dest, src)                  ip4_addr_set(dest, src)
+#define ip_addr_set_ipaddr(dest, src)           ip4_addr_set(dest, src)
+#define ip_addr_set_zero(ipaddr)                ip4_addr_set_zero(ipaddr)
+#define ip_addr_set_zero_ip4(ipaddr)            ip4_addr_set_zero(ipaddr)
+#define ip_addr_set_any(is_ipv6, ipaddr)        ip4_addr_set_any(ipaddr)
+#define ip_addr_set_loopback(is_ipv6, ipaddr)   ip4_addr_set_loopback(ipaddr)
+#define ip_addr_set_hton(dest, src)             ip4_addr_set_hton(dest, src)
+#define ip_addr_get_network(target, host, mask) ip4_addr_get_network(target, host, mask)
+#define ip_addr_netcmp(addr1, addr2, mask)      ip4_addr_net_eq(addr1, addr2, mask)
+#define ip_addr_net_eq(addr1, addr2, mask)      ip4_addr_net_eq(addr1, addr2, mask)
+#define ip_addr_cmp(addr1, addr2)               ip4_addr_eq(addr1, addr2)
+#define ip_addr_eq(addr1, addr2)                ip4_addr_eq(addr1, addr2)
+#define ip_addr_isany(ipaddr)                   ip4_addr_isany(ipaddr)
+#define ip_addr_isany_val(ipaddr)               ip4_addr_isany_val(ipaddr)
+#define ip_addr_isloopback(ipaddr)              ip4_addr_isloopback(ipaddr)
+#define ip_addr_islinklocal(ipaddr)             ip4_addr_islinklocal(ipaddr)
+#define ip_addr_isbroadcast(addr, netif)        ip4_addr_isbroadcast(addr, netif)
+#define ip_addr_ismulticast(ipaddr)             ip4_addr_ismulticast(ipaddr)
+#define ip_addr_debug_print(debug, ipaddr)      ip4_addr_debug_print(debug, ipaddr)
+#define ip_addr_debug_print_val(debug, ipaddr)  ip4_addr_debug_print_val(debug, ipaddr)
+#define ipaddr_ntoa(ipaddr)                     ip4addr_ntoa(ipaddr)
+#define ipaddr_ntoa_r(ipaddr, buf, buflen)      ip4addr_ntoa_r(ipaddr, buf, buflen)
+#define ipaddr_aton(cp, addr)                   ip4addr_aton(cp, addr)
+
+#define IPADDR_STRLEN_MAX   IP4ADDR_STRLEN_MAX
+
+#define IP46_ADDR_ANY(type) (IP4_ADDR_ANY)
+
+#else /* LWIP_IPV4 */
+
+typedef ip6_addr_t ip_addr_t;
+#define IPADDR6_INIT(a, b, c, d)                { { a, b, c, d } IPADDR6_ZONE_INIT }
+#define IPADDR6_INIT_HOST(a, b, c, d)           { { PP_HTONL(a), PP_HTONL(b), PP_HTONL(c), PP_HTONL(d) } IPADDR6_ZONE_INIT }
+#define IP_IS_V4_VAL(ipaddr)                    0
+#define IP_IS_V6_VAL(ipaddr)                    1
+#define IP_IS_V4(ipaddr)                        0
+#define IP_IS_V6(ipaddr)                        1
+#define IP_IS_ANY_TYPE_VAL(ipaddr)              0
+#define IP_SET_TYPE_VAL(ipaddr, iptype)
+#define IP_SET_TYPE(ipaddr, iptype)
+#define IP_GET_TYPE(ipaddr)                     IPADDR_TYPE_V6
+#define IP_ADDR_RAW_SIZE(ipaddr)                sizeof(ip6_addr_t)
+#define ip_2_ip6(ipaddr)                        (ipaddr)
+#define IP_ADDR6(ipaddr,i0,i1,i2,i3)            IP6_ADDR(ipaddr,i0,i1,i2,i3)
+#define IP_ADDR6_HOST(ipaddr,i0,i1,i2,i3)       IP_ADDR6(ipaddr,PP_HTONL(i0),PP_HTONL(i1),PP_HTONL(i2),PP_HTONL(i3))
+
+#define ip_addr_copy(dest, src)                 ip6_addr_copy(dest, src)
+#define ip_addr_copy_from_ip6(dest, src)        ip6_addr_copy(dest, src)
+#define ip_addr_copy_from_ip6_packed(dest, src) ip6_addr_copy_from_packed(dest, src)
+#define ip_addr_set(dest, src)                  ip6_addr_set(dest, src)
+#define ip_addr_set_ipaddr(dest, src)           ip6_addr_set(dest, src)
+#define ip_addr_set_zero(ipaddr)                ip6_addr_set_zero(ipaddr)
+#define ip_addr_set_zero_ip6(ipaddr)            ip6_addr_set_zero(ipaddr)
+#define ip_addr_set_any(is_ipv6, ipaddr)        ip6_addr_set_any(ipaddr)
+#define ip_addr_set_loopback(is_ipv6, ipaddr)   ip6_addr_set_loopback(ipaddr)
+#define ip_addr_set_hton(dest, src)             ip6_addr_set_hton(dest, src)
+#define ip_addr_get_network(target, host, mask) ip6_addr_set_zero(target)
+#define ip_addr_netcmp(addr1, addr2, mask)      0
+#define ip_addr_net_eq(addr1, addr2, mask)      0
+#define ip_addr_cmp(addr1, addr2)               ip6_addr_eq(addr1, addr2)
+#define ip_addr_eq(addr1, addr2)                ip6_addr_eq(addr1, addr2)
+#define ip_addr_cmp_zoneless(addr1, addr2)      ip6_addr_zoneless_eq(addr1, addr2)
+#define ip_addr_zoneless_eq(addr1, addr2)       ip6_addr_zoneless_eq(addr1, addr2)
+#define ip_addr_isany(ipaddr)                   ip6_addr_isany(ipaddr)
+#define ip_addr_isany_val(ipaddr)               ip6_addr_isany_val(ipaddr)
+#define ip_addr_isloopback(ipaddr)              ip6_addr_isloopback(ipaddr)
+#define ip_addr_islinklocal(ipaddr)             ip6_addr_islinklocal(ipaddr)
+#define ip_addr_isbroadcast(addr, netif)        0
+#define ip_addr_ismulticast(ipaddr)             ip6_addr_ismulticast(ipaddr)
+#define ip_addr_debug_print(debug, ipaddr)      ip6_addr_debug_print(debug, ipaddr)
+#define ip_addr_debug_print_val(debug, ipaddr)  ip6_addr_debug_print_val(debug, ipaddr)
+#define ipaddr_ntoa(ipaddr)                     ip6addr_ntoa(ipaddr)
+#define ipaddr_ntoa_r(ipaddr, buf, buflen)      ip6addr_ntoa_r(ipaddr, buf, buflen)
+#define ipaddr_aton(cp, addr)                   ip6addr_aton(cp, addr)
+
+#define IPADDR_STRLEN_MAX   IP6ADDR_STRLEN_MAX
+
+#define IP46_ADDR_ANY(type) (IP6_ADDR_ANY)
+
+#endif /* LWIP_IPV4 */
+#endif /* LWIP_IPV4 && LWIP_IPV6 */
+
+#if LWIP_IPV4
+
+extern const ip_addr_t ip_addr_any;
+extern const ip_addr_t ip_addr_broadcast;
+
+/**
+ * @ingroup ip4addr
+ * Can be used as a fixed/const ip_addr_t
+ * for the IP wildcard.
+ * Defined to @ref IP4_ADDR_ANY when IPv4 is enabled.
+ * Defined to @ref IP6_ADDR_ANY in IPv6 only systems.
+ * Use this if you can handle IPv4 _AND_ IPv6 addresses.
+ * Use @ref IP4_ADDR_ANY or @ref IP6_ADDR_ANY when the IP
+ * type matters.
+ */
+#define IP_ADDR_ANY         IP4_ADDR_ANY
+/**
+ * @ingroup ip4addr
+ * Can be used as a fixed/const ip_addr_t
+ * for the IPv4 wildcard and the broadcast address
+ */
+#define IP4_ADDR_ANY        (&ip_addr_any)
+/**
+ * @ingroup ip4addr
+ * Can be used as a fixed/const ip4_addr_t
+ * for the wildcard and the broadcast address
+ */
+#define IP4_ADDR_ANY4       (ip_2_ip4(&ip_addr_any))
+
+/** @ingroup ip4addr */
+#define IP_ADDR_BROADCAST   (&ip_addr_broadcast)
+/** @ingroup ip4addr */
+#define IP4_ADDR_BROADCAST  (ip_2_ip4(&ip_addr_broadcast))
+
+#endif /* LWIP_IPV4*/
+
+#if LWIP_IPV6
+
+extern const ip_addr_t ip6_addr_any;
+
+/**
+ * @ingroup ip6addr
+ * IP6_ADDR_ANY can be used as a fixed ip_addr_t
+ * for the IPv6 wildcard address
+ */
+#define IP6_ADDR_ANY   (&ip6_addr_any)
+/**
+ * @ingroup ip6addr
+ * IP6_ADDR_ANY6 can be used as a fixed ip6_addr_t
+ * for the IPv6 wildcard address
+ */
+#define IP6_ADDR_ANY6  (ip_2_ip6(&ip6_addr_any))
+
+#if !LWIP_IPV4
+/** IPv6-only configurations */
+#define IP_ADDR_ANY IP6_ADDR_ANY
+#endif /* !LWIP_IPV4 */
+
+#endif
+
+/** @ingroup ipaddr
+ *  Macro representing the 'any' address. */
+#if LWIP_IPV4 && LWIP_IPV6
+#define IP_ANY_TYPE    (&ip_addr_any_type)
+#else
+#define IP_ANY_TYPE    IP_ADDR_ANY
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_IP_ADDR_H */

src/lwip/include/lwip/mem.h

@@ -0,0 +1,82 @@
+/**
+ * @file
+ * Heap API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_MEM_H
+#define LWIP_HDR_MEM_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if MEM_LIBC_MALLOC
+
+#include "lwip/arch.h"
+
+typedef size_t mem_size_t;
+#define MEM_SIZE_F SZT_F
+
+#elif MEM_USE_POOLS
+
+typedef u16_t mem_size_t;
+#define MEM_SIZE_F U16_F
+
+#else
+
+/* MEM_SIZE would have to be aligned, but using 64000 here instead of
+ * 65535 leaves some room for alignment...
+ */
+#if MEM_SIZE > 64000L
+typedef u32_t mem_size_t;
+#define MEM_SIZE_F U32_F
+#else
+typedef u16_t mem_size_t;
+#define MEM_SIZE_F U16_F
+#endif /* MEM_SIZE > 64000 */
+#endif
+
+void  mem_init(void);
+void *mem_trim(void *mem, mem_size_t size);
+void *mem_malloc(mem_size_t size);
+void *mem_calloc(mem_size_t count, mem_size_t size);
+void  mem_free(void *mem);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_MEM_H */

src/lwip/include/lwip/memp.h

@@ -0,0 +1,155 @@
+/**
+ * @file
+ * Memory pool API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef LWIP_HDR_MEMP_H
+#define LWIP_HDR_MEMP_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* run once with empty definition to handle all custom includes in lwippools.h */
+#define LWIP_MEMPOOL(name,num,size,desc)
+#include "lwip/priv/memp_std.h"
+
+/** Create the list of all memory pools managed by memp. MEMP_MAX represents a NULL pool at the end */
+typedef enum {
+#define LWIP_MEMPOOL(name,num,size,desc)  MEMP_##name,
+#include "lwip/priv/memp_std.h"
+  MEMP_MAX
+} memp_t;
+
+#include "lwip/priv/memp_priv.h"
+#include "lwip/stats.h"
+
+extern const struct memp_desc* const memp_pools[MEMP_MAX];
+
+/**
+ * @ingroup mempool
+ * Declare prototype for private memory pool if it is used in multiple files
+ */
+#define LWIP_MEMPOOL_PROTOTYPE(name) extern const struct memp_desc memp_ ## name
+
+#if MEMP_MEM_MALLOC
+
+#define LWIP_MEMPOOL_DECLARE(name,num,size,desc) \
+  LWIP_MEMPOOL_DECLARE_STATS_INSTANCE(memp_stats_ ## name) \
+  const struct memp_desc memp_ ## name = { \
+    DECLARE_LWIP_MEMPOOL_DESC(desc) \
+    LWIP_MEMPOOL_DECLARE_STATS_REFERENCE(memp_stats_ ## name) \
+    LWIP_MEM_ALIGN_SIZE(size) \
+  };
+
+#else /* MEMP_MEM_MALLOC */
+
+/**
+ * @ingroup mempool
+ * Declare a private memory pool
+ * Private mempools example:
+ * .h: only when pool is used in multiple .c files: LWIP_MEMPOOL_PROTOTYPE(my_private_pool);
+ * .c:
+ *   - in global variables section: LWIP_MEMPOOL_DECLARE(my_private_pool, 10, sizeof(foo), "Some description")
+ *   - call ONCE before using pool (e.g. in some init() function): LWIP_MEMPOOL_INIT(my_private_pool);
+ *   - allocate: void* my_new_mem = LWIP_MEMPOOL_ALLOC(my_private_pool);
+ *   - free: LWIP_MEMPOOL_FREE(my_private_pool, my_new_mem);
+ *
+ * To relocate a pool, declare it as extern in cc.h. Example for GCC:
+ *   extern u8_t \_\_attribute\_\_((section(".onchip_mem"))) memp_memory_my_private_pool_base[];
+ */
+#define LWIP_MEMPOOL_DECLARE(name,num,size,desc) \
+  LWIP_DECLARE_MEMORY_ALIGNED(memp_memory_ ## name ## _base, ((num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size)))); \
+    \
+  LWIP_MEMPOOL_DECLARE_STATS_INSTANCE(memp_stats_ ## name) \
+    \
+  static struct memp *memp_tab_ ## name; \
+    \
+  const struct memp_desc memp_ ## name = { \
+    DECLARE_LWIP_MEMPOOL_DESC(desc) \
+    LWIP_MEMPOOL_DECLARE_STATS_REFERENCE(memp_stats_ ## name) \
+    LWIP_MEM_ALIGN_SIZE(size), \
+    (num), \
+    memp_memory_ ## name ## _base, \
+    &memp_tab_ ## name \
+  };
+
+#endif /* MEMP_MEM_MALLOC */
+
+/**
+ * @ingroup mempool
+ * Initialize a private memory pool
+ */
+#define LWIP_MEMPOOL_INIT(name)    memp_init_pool(&memp_ ## name)
+/**
+ * @ingroup mempool
+ * Allocate from a private memory pool
+ */
+#define LWIP_MEMPOOL_ALLOC(name)   memp_malloc_pool(&memp_ ## name)
+/**
+ * @ingroup mempool
+ * Free element from a private memory pool
+ */
+#define LWIP_MEMPOOL_FREE(name, x) memp_free_pool(&memp_ ## name, (x))
+
+#if MEM_USE_POOLS
+/** This structure is used to save the pool one element came from.
+ * This has to be defined here as it is required for pool size calculation. */
+struct memp_malloc_helper
+{
+   memp_t poolnr;
+#if MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS)
+   u16_t size;
+#endif /* MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS) */
+};
+#endif /* MEM_USE_POOLS */
+
+void  memp_init(void);
+
+#if MEMP_OVERFLOW_CHECK
+void *memp_malloc_fn(memp_t type, const char* file, const int line);
+#define memp_malloc(t) memp_malloc_fn((t), __FILE__, __LINE__)
+#else
+void *memp_malloc(memp_t type);
+#endif
+void  memp_free(memp_t type, void *mem);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_MEMP_H */

src/lwip/include/lwip/mld6.h

@@ -0,0 +1,99 @@
+/**
+ * @file
+ *
+ * Multicast listener discovery for IPv6. Aims to be compliant with RFC 2710.
+ * No support for MLDv2.
+ */
+
+/*
+ * Copyright (c) 2010 Inico Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Ivan Delamer <delamer@inicotech.com>
+ *
+ *
+ * Please coordinate changes and requests with Ivan Delamer
+ * <delamer@inicotech.com>
+ */
+
+#ifndef LWIP_HDR_MLD6_H
+#define LWIP_HDR_MLD6_H
+
+#include "lwip/opt.h"
+
+#if LWIP_IPV6_MLD && LWIP_IPV6  /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** MLD group */
+struct mld_group {
+  /** next link */
+  struct mld_group *next;
+  /** multicast address */
+  ip6_addr_t         group_address;
+  /** signifies we were the last person to report */
+  u8_t               last_reporter_flag;
+  /** current state of the group */
+  u8_t               group_state;
+  /** timer for reporting */
+  u16_t              timer;
+  /** counter of simultaneous uses */
+  u8_t               use;
+};
+
+#define MLD6_TMR_INTERVAL              100 /* Milliseconds */
+
+err_t  mld6_stop(struct netif *netif);
+void   mld6_report_groups(struct netif *netif);
+void   mld6_tmr(void);
+struct mld_group *mld6_lookfor_group(struct netif *ifp, const ip6_addr_t *addr);
+void   mld6_input(struct pbuf *p, struct netif *inp);
+err_t  mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr);
+err_t  mld6_joingroup_netif(struct netif *netif, const ip6_addr_t *groupaddr);
+err_t  mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr);
+err_t  mld6_leavegroup_netif(struct netif *netif, const ip6_addr_t *groupaddr);
+
+/** @ingroup mld6
+ * Get list head of MLD6 groups for netif.
+ * Note: The allnodes group IP is NOT in the list, since it must always
+ * be received for correct IPv6 operation.
+ * @see @ref netif_set_mld_mac_filter()
+ */
+#define netif_mld6_data(netif) ((struct mld_group *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV6_MLD && LWIP_IPV6 */
+
+#endif /* LWIP_HDR_MLD6_H */

src/lwip/include/lwip/nd6.h

@@ -0,0 +1,90 @@
+/**
+ * @file
+ *
+ * Neighbor discovery and stateless address autoconfiguration for IPv6.
+ * Aims to be compliant with RFC 4861 (Neighbor discovery) and RFC 4862
+ * (Address autoconfiguration).
+ */
+
+/*
+ * Copyright (c) 2010 Inico Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Ivan Delamer <delamer@inicotech.com>
+ *
+ *
+ * Please coordinate changes and requests with Ivan Delamer
+ * <delamer@inicotech.com>
+ */
+
+#ifndef LWIP_HDR_ND6_H
+#define LWIP_HDR_ND6_H
+
+#include "lwip/opt.h"
+
+#if LWIP_IPV6  /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/ip6_addr.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** 1 second period */
+#define ND6_TMR_INTERVAL 1000
+
+/** Router solicitations are sent in 4 second intervals (see RFC 4861, ch. 6.3.7) */
+#ifndef ND6_RTR_SOLICITATION_INTERVAL
+#define ND6_RTR_SOLICITATION_INTERVAL  4000
+#endif
+
+struct pbuf;
+struct netif;
+
+void nd6_tmr(void);
+void nd6_input(struct pbuf *p, struct netif *inp);
+void nd6_clear_destination_cache(void);
+struct netif *nd6_find_route(const ip6_addr_t *ip6addr);
+err_t nd6_get_next_hop_addr_or_queue(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr, const u8_t **hwaddrp);
+u16_t nd6_get_destination_mtu(const ip6_addr_t *ip6addr, struct netif *netif);
+#if LWIP_ND6_TCP_REACHABILITY_HINTS
+void nd6_reachability_hint(const ip6_addr_t *ip6addr);
+#endif /* LWIP_ND6_TCP_REACHABILITY_HINTS */
+void nd6_cleanup_netif(struct netif *netif);
+#if LWIP_IPV6_MLD
+void nd6_adjust_mld_membership(struct netif *netif, s8_t addr_idx, u8_t new_state);
+#endif /* LWIP_IPV6_MLD */
+void nd6_restart_netif(struct netif *netif);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV6 */
+
+#endif /* LWIP_HDR_ND6_H */

src/lwip/include/lwip/netbuf.h

@@ -0,0 +1,116 @@
+/**
+ * @file
+ * netbuf API (for netconn API)
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_NETBUF_H
+#define LWIP_HDR_NETBUF_H
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
+/* Note: Netconn API is always available when sockets are enabled -
+ * sockets are implemented on top of them */
+
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+#include "lwip/ip6_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** This netbuf has dest-addr/port set */
+#define NETBUF_FLAG_DESTADDR    0x01
+/** This netbuf includes a checksum */
+#define NETBUF_FLAG_CHKSUM      0x02
+
+/** "Network buffer" - contains data and addressing info */
+struct netbuf {
+  struct pbuf *p, *ptr;
+  ip_addr_t addr;
+  u16_t port;
+#if LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY
+  u8_t flags;
+  u16_t toport_chksum;
+#if LWIP_NETBUF_RECVINFO
+  ip_addr_t toaddr;
+#endif /* LWIP_NETBUF_RECVINFO */
+#endif /* LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY */
+};
+
+/* Network buffer functions: */
+struct netbuf *   netbuf_new      (void);
+void              netbuf_delete   (struct netbuf *buf);
+void *            netbuf_alloc    (struct netbuf *buf, u16_t size);
+void              netbuf_free     (struct netbuf *buf);
+err_t             netbuf_ref      (struct netbuf *buf,
+                                   const void *dataptr, u16_t size);
+void              netbuf_chain    (struct netbuf *head, struct netbuf *tail);
+
+err_t             netbuf_data     (struct netbuf *buf,
+                                   void **dataptr, u16_t *len);
+s8_t              netbuf_next     (struct netbuf *buf);
+void              netbuf_first    (struct netbuf *buf);
+
+
+#define netbuf_copy_partial(buf, dataptr, len, offset) \
+  pbuf_copy_partial((buf)->p, (dataptr), (len), (offset))
+#define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0)
+#define netbuf_take(buf, dataptr, len) pbuf_take((buf)->p, dataptr, len)
+#define netbuf_len(buf)              ((buf)->p->tot_len)
+#define netbuf_fromaddr(buf)         (&((buf)->addr))
+#define netbuf_set_fromaddr(buf, fromaddr) ip_addr_set(&((buf)->addr), fromaddr)
+#define netbuf_fromport(buf)         ((buf)->port)
+#if LWIP_NETBUF_RECVINFO
+#define netbuf_destaddr(buf)         (&((buf)->toaddr))
+#define netbuf_set_destaddr(buf, destaddr) ip_addr_set(&((buf)->toaddr), destaddr)
+#if LWIP_CHECKSUM_ON_COPY
+#define netbuf_destport(buf)         (((buf)->flags & NETBUF_FLAG_DESTADDR) ? (buf)->toport_chksum : 0)
+#else /* LWIP_CHECKSUM_ON_COPY */
+#define netbuf_destport(buf)         ((buf)->toport_chksum)
+#endif /* LWIP_CHECKSUM_ON_COPY */
+#endif /* LWIP_NETBUF_RECVINFO */
+#if LWIP_CHECKSUM_ON_COPY
+#define netbuf_set_chksum(buf, chksum) do { (buf)->flags = NETBUF_FLAG_CHKSUM; \
+                                            (buf)->toport_chksum = chksum; } while(0)
+#endif /* LWIP_CHECKSUM_ON_COPY */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_NETCONN || LWIP_SOCKET */
+
+#endif /* LWIP_HDR_NETBUF_H */

src/lwip/include/lwip/netdb.h

@@ -0,0 +1,150 @@
+/**
+ * @file
+ * NETDB API (sockets)
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt
+ *
+ */
+#ifndef LWIP_HDR_NETDB_H
+#define LWIP_HDR_NETDB_H
+
+#include "lwip/opt.h"
+
+#if LWIP_DNS && LWIP_SOCKET
+
+#include "lwip/arch.h"
+#include "lwip/inet.h"
+#include "lwip/sockets.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* some rarely used options */
+#ifndef LWIP_DNS_API_DECLARE_H_ERRNO
+#define LWIP_DNS_API_DECLARE_H_ERRNO  1
+#endif
+
+#ifndef LWIP_DNS_API_DEFINE_ERRORS
+#define LWIP_DNS_API_DEFINE_ERRORS    1
+#endif
+
+#ifndef LWIP_DNS_API_DEFINE_FLAGS
+#define LWIP_DNS_API_DEFINE_FLAGS     1
+#endif
+
+#ifndef LWIP_DNS_API_DECLARE_STRUCTS
+#define LWIP_DNS_API_DECLARE_STRUCTS  1
+#endif
+
+#if LWIP_DNS_API_DEFINE_ERRORS
+/** Errors used by the DNS API functions, h_errno can be one of them */
+#define EAI_NONAME      200
+#define EAI_SERVICE     201
+#define EAI_FAIL        202
+#define EAI_MEMORY      203
+#define EAI_FAMILY      204
+
+#define HOST_NOT_FOUND  210
+#define NO_DATA         211
+#define NO_RECOVERY     212
+#define TRY_AGAIN       213
+#endif /* LWIP_DNS_API_DEFINE_ERRORS */
+
+#if LWIP_DNS_API_DEFINE_FLAGS
+/* input flags for struct addrinfo */
+#define AI_PASSIVE      0x01
+#define AI_CANONNAME    0x02
+#define AI_NUMERICHOST  0x04
+#define AI_NUMERICSERV  0x08
+#define AI_V4MAPPED     0x10
+#define AI_ALL          0x20
+#define AI_ADDRCONFIG   0x40
+#endif /* LWIP_DNS_API_DEFINE_FLAGS */
+
+#if LWIP_DNS_API_DECLARE_STRUCTS
+struct hostent {
+    char  *h_name;      /* Official name of the host. */
+    char **h_aliases;   /* A pointer to an array of pointers to alternative host names,
+                           terminated by a null pointer. */
+    int    h_addrtype;  /* Address type. */
+    int    h_length;    /* The length, in bytes, of the address. */
+    char **h_addr_list; /* A pointer to an array of pointers to network addresses (in
+                           network byte order) for the host, terminated by a null pointer. */
+#define h_addr h_addr_list[0] /* for backward compatibility */
+};
+
+struct addrinfo {
+    int               ai_flags;      /* Input flags. */
+    int               ai_family;     /* Address family of socket. */
+    int               ai_socktype;   /* Socket type. */
+    int               ai_protocol;   /* Protocol of socket. */
+    socklen_t         ai_addrlen;    /* Length of socket address. */
+    struct sockaddr  *ai_addr;       /* Socket address of socket. */
+    char             *ai_canonname;  /* Canonical name of service location. */
+    struct addrinfo  *ai_next;       /* Pointer to next in list. */
+};
+#endif /* LWIP_DNS_API_DECLARE_STRUCTS */
+
+#define NETDB_ELEM_SIZE           (sizeof(struct addrinfo) + sizeof(struct sockaddr_storage) + DNS_MAX_NAME_LENGTH + 1)
+
+#if LWIP_DNS_API_DECLARE_H_ERRNO
+/* application accessible error code set by the DNS API functions */
+extern int h_errno;
+#endif /* LWIP_DNS_API_DECLARE_H_ERRNO*/
+
+struct hostent *lwip_gethostbyname(const char *name);
+int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
+                size_t buflen, struct hostent **result, int *h_errnop);
+void lwip_freeaddrinfo(struct addrinfo *ai);
+int lwip_getaddrinfo(const char *nodename,
+       const char *servname,
+       const struct addrinfo *hints,
+       struct addrinfo **res);
+
+#if LWIP_COMPAT_SOCKETS
+/** @ingroup netdbapi */
+#define gethostbyname(name) lwip_gethostbyname(name)
+/** @ingroup netdbapi */
+#define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \
+       lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop)
+/** @ingroup netdbapi */
+#define freeaddrinfo(addrinfo) lwip_freeaddrinfo(addrinfo)
+/** @ingroup netdbapi */
+#define getaddrinfo(nodname, servname, hints, res) \
+       lwip_getaddrinfo(nodname, servname, hints, res)
+#endif /* LWIP_COMPAT_SOCKETS */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_DNS && LWIP_SOCKET */
+
+#endif /* LWIP_HDR_NETDB_H */

src/lwip/include/lwip/netif.h

@@ -0,0 +1,698 @@
+/**
+ * @file
+ * netif API (to be used from TCPIP thread)
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_NETIF_H
+#define LWIP_HDR_NETIF_H
+
+#include "lwip/opt.h"
+
+#define ENABLE_LOOPBACK (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF)
+
+#include "lwip/err.h"
+
+#include "lwip/ip_addr.h"
+
+#include "lwip/def.h"
+#include "lwip/pbuf.h"
+#include "lwip/stats.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Throughout this file, IP addresses are expected to be in
+ * the same byte order as in IP_PCB. */
+
+/** Must be the maximum of all used hardware address lengths
+    across all types of interfaces in use.
+    This does not have to be changed, normally. */
+#ifndef NETIF_MAX_HWADDR_LEN
+#define NETIF_MAX_HWADDR_LEN 6U
+#endif
+
+/** The size of a fully constructed netif name which the
+ * netif can be identified by in APIs. Composed of
+ * 2 chars, 3 (max) digits, and 1 \0
+ */
+#define NETIF_NAMESIZE 6
+
+/**
+ * @defgroup netif_flags Flags
+ * @ingroup netif
+ * @{
+ */
+
+/** Whether the network interface is 'up'. This is
+ * a software flag used to control whether this network
+ * interface is enabled and processes traffic.
+ * It must be set by the startup code before this netif can be used
+ * (also for dhcp/autoip).
+ */
+#define NETIF_FLAG_UP           0x01U
+/** If set, the netif has broadcast capability.
+ * Set by the netif driver in its init function. */
+#define NETIF_FLAG_BROADCAST    0x02U
+/** If set, the interface has an active link
+ *  (set by the network interface driver).
+ * Either set by the netif driver in its init function (if the link
+ * is up at that time) or at a later point once the link comes up
+ * (if link detection is supported by the hardware). */
+#define NETIF_FLAG_LINK_UP      0x04U
+/** If set, the netif is an ethernet device using ARP.
+ * Set by the netif driver in its init function.
+ * Used to check input packet types and use of DHCP. */
+#define NETIF_FLAG_ETHARP       0x08U
+/** If set, the netif is an ethernet device. It might not use
+ * ARP or TCP/IP if it is used for PPPoE only.
+ */
+#define NETIF_FLAG_ETHERNET     0x10U
+/** If set, the netif has IGMP capability.
+ * Set by the netif driver in its init function. */
+#define NETIF_FLAG_IGMP         0x20U
+/** If set, the netif has MLD6 capability.
+ * Set by the netif driver in its init function. */
+#define NETIF_FLAG_MLD6         0x40U
+
+/**
+ * @}
+ */
+
+enum lwip_internal_netif_client_data_index
+{
+#if LWIP_IPV4
+#if LWIP_DHCP
+   LWIP_NETIF_CLIENT_DATA_INDEX_DHCP,
+#endif
+#if LWIP_AUTOIP
+   LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP,
+#endif
+#if LWIP_ACD
+   LWIP_NETIF_CLIENT_DATA_INDEX_ACD,
+#endif
+#if LWIP_IGMP
+   LWIP_NETIF_CLIENT_DATA_INDEX_IGMP,
+#endif
+#endif /* LWIP_IPV4 */
+#if LWIP_IPV6
+#if LWIP_IPV6_DHCP6
+   LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6,
+#endif
+#if LWIP_IPV6_MLD
+   LWIP_NETIF_CLIENT_DATA_INDEX_MLD6,
+#endif
+#endif /* LWIP_IPV6 */
+   LWIP_NETIF_CLIENT_DATA_INDEX_MAX
+};
+
+#if LWIP_CHECKSUM_CTRL_PER_NETIF
+#define NETIF_CHECKSUM_GEN_IP       0x0001
+#define NETIF_CHECKSUM_GEN_UDP      0x0002
+#define NETIF_CHECKSUM_GEN_TCP      0x0004
+#define NETIF_CHECKSUM_GEN_ICMP     0x0008
+#define NETIF_CHECKSUM_GEN_ICMP6    0x0010
+#define NETIF_CHECKSUM_CHECK_IP     0x0100
+#define NETIF_CHECKSUM_CHECK_UDP    0x0200
+#define NETIF_CHECKSUM_CHECK_TCP    0x0400
+#define NETIF_CHECKSUM_CHECK_ICMP   0x0800
+#define NETIF_CHECKSUM_CHECK_ICMP6  0x1000
+#define NETIF_CHECKSUM_ENABLE_ALL   0xFFFF
+#define NETIF_CHECKSUM_DISABLE_ALL  0x0000
+#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */
+
+struct netif;
+
+/** MAC Filter Actions, these are passed to a netif's igmp_mac_filter or
+ * mld_mac_filter callback function. */
+enum netif_mac_filter_action {
+  /** Delete a filter entry */
+  NETIF_DEL_MAC_FILTER = 0,
+  /** Add a filter entry */
+  NETIF_ADD_MAC_FILTER = 1
+};
+
+/** Function prototype for netif init functions. Set up flags and output/linkoutput
+ * callback functions in this function.
+ *
+ * @param netif The netif to initialize
+ */
+typedef err_t (*netif_init_fn)(struct netif *netif);
+/** Function prototype for netif->input functions. This function is saved as 'input'
+ * callback function in the netif struct. Call it when a packet has been received.
+ *
+ * @param p The received packet, copied into a pbuf
+ * @param inp The netif which received the packet
+ * @return ERR_OK if the packet was handled
+ *         != ERR_OK is the packet was NOT handled, in this case, the caller has
+ *                   to free the pbuf
+ */
+typedef err_t (*netif_input_fn)(struct pbuf *p, struct netif *inp);
+
+#if LWIP_IPV4
+/** Function prototype for netif->output functions. Called by lwIP when a packet
+ * shall be sent. For ethernet netif, set this to 'etharp_output' and set
+ * 'linkoutput'.
+ *
+ * @param netif The netif which shall send a packet
+ * @param p The packet to send (p->payload points to IP header)
+ * @param ipaddr The IP address to which the packet shall be sent
+ */
+typedef err_t (*netif_output_fn)(struct netif *netif, struct pbuf *p,
+       const ip4_addr_t *ipaddr);
+#endif /* LWIP_IPV4*/
+
+#if LWIP_IPV6
+/** Function prototype for netif->output_ip6 functions. Called by lwIP when a packet
+ * shall be sent. For ethernet netif, set this to 'ethip6_output' and set
+ * 'linkoutput'.
+ *
+ * @param netif The netif which shall send a packet
+ * @param p The packet to send (p->payload points to IP header)
+ * @param ipaddr The IPv6 address to which the packet shall be sent
+ */
+typedef err_t (*netif_output_ip6_fn)(struct netif *netif, struct pbuf *p,
+       const ip6_addr_t *ipaddr);
+#endif /* LWIP_IPV6 */
+
+/** Function prototype for netif->linkoutput functions. Only used for ethernet
+ * netifs. This function is called by ARP when a packet shall be sent.
+ *
+ * @param netif The netif which shall send a packet
+ * @param p The packet to send (raw ethernet packet)
+ */
+typedef err_t (*netif_linkoutput_fn)(struct netif *netif, struct pbuf *p);
+/** Function prototype for netif status- or link-callback functions. */
+typedef void (*netif_status_callback_fn)(struct netif *netif);
+#if LWIP_IPV4 && LWIP_IGMP
+/** Function prototype for netif igmp_mac_filter functions */
+typedef err_t (*netif_igmp_mac_filter_fn)(struct netif *netif,
+       const ip4_addr_t *group, enum netif_mac_filter_action action);
+#endif /* LWIP_IPV4 && LWIP_IGMP */
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+/** Function prototype for netif mld_mac_filter functions */
+typedef err_t (*netif_mld_mac_filter_fn)(struct netif *netif,
+       const ip6_addr_t *group, enum netif_mac_filter_action action);
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+
+#if LWIP_DHCP || LWIP_AUTOIP || LWIP_IGMP || LWIP_IPV6_MLD || LWIP_IPV6_DHCP6 || (LWIP_NUM_NETIF_CLIENT_DATA > 0)
+#if LWIP_NUM_NETIF_CLIENT_DATA > 0
+u8_t netif_alloc_client_data_id(void);
+#endif
+/** @ingroup netif_cd
+ * Set client data. Obtain ID from netif_alloc_client_data_id().
+ */
+#define netif_set_client_data(netif, id, data) netif_get_client_data(netif, id) = (data)
+/** @ingroup netif_cd
+ * Get client data. Obtain ID from netif_alloc_client_data_id().
+ */
+#define netif_get_client_data(netif, id)       (netif)->client_data[(id)]
+#endif
+
+#if (LWIP_IPV4 && LWIP_ARP && (ARP_TABLE_SIZE > 0x7f)) || (LWIP_IPV6 && (LWIP_ND6_NUM_DESTINATIONS > 0x7f))
+typedef u16_t netif_addr_idx_t;
+#define NETIF_ADDR_IDX_MAX 0x7FFF
+#else
+typedef u8_t netif_addr_idx_t;
+#define NETIF_ADDR_IDX_MAX 0x7F
+#endif
+
+#if LWIP_NETIF_HWADDRHINT || LWIP_VLAN_PCP
+ #define LWIP_NETIF_USE_HINTS              1
+ struct netif_hint {
+#if LWIP_NETIF_HWADDRHINT
+   u8_t addr_hint;
+#endif
+#if LWIP_VLAN_PCP
+  /** VLAN hader is set if this is >= 0 (but must be <= 0xFFFF) */
+  s32_t tci;
+#endif
+ };
+#else /* LWIP_NETIF_HWADDRHINT || LWIP_VLAN_PCP */
+ #define LWIP_NETIF_USE_HINTS              0
+#endif /* LWIP_NETIF_HWADDRHINT || LWIP_VLAN_PCP*/
+
+/** Generic data structure used for all lwIP network interfaces.
+ *  The following fields should be filled in by the initialization
+ *  function for the device driver: hwaddr_len, hwaddr[], mtu, flags */
+struct netif {
+#if !LWIP_SINGLE_NETIF
+  /** pointer to next in linked list */
+  struct netif *next;
+#endif
+
+#if LWIP_IPV4
+  /** IP address configuration in network byte order */
+  ip_addr_t ip_addr;
+  ip_addr_t netmask;
+  ip_addr_t gw;
+#endif /* LWIP_IPV4 */
+#if LWIP_IPV6
+  /** Array of IPv6 addresses for this netif. */
+  ip_addr_t ip6_addr[LWIP_IPV6_NUM_ADDRESSES];
+  /** The state of each IPv6 address (Tentative, Preferred, etc).
+   * @see ip6_addr.h */
+  u8_t ip6_addr_state[LWIP_IPV6_NUM_ADDRESSES];
+#if LWIP_IPV6_ADDRESS_LIFETIMES
+  /** Remaining valid and preferred lifetime of each IPv6 address, in seconds.
+   * For valid lifetimes, the special value of IP6_ADDR_LIFE_STATIC (0)
+   * indicates the address is static and has no lifetimes. */
+  u32_t ip6_addr_valid_life[LWIP_IPV6_NUM_ADDRESSES];
+  u32_t ip6_addr_pref_life[LWIP_IPV6_NUM_ADDRESSES];
+#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */
+#endif /* LWIP_IPV6 */
+  /** This function is called by the network device driver
+   *  to pass a packet up the TCP/IP stack. */
+  netif_input_fn input;
+#if LWIP_IPV4
+  /** This function is called by the IP module when it wants
+   *  to send a packet on the interface. This function typically
+   *  first resolves the hardware address, then sends the packet.
+   *  For ethernet physical layer, this is usually etharp_output() */
+  netif_output_fn output;
+#endif /* LWIP_IPV4 */
+  /** This function is called by ethernet_output() when it wants
+   *  to send a packet on the interface. This function outputs
+   *  the pbuf as-is on the link medium. */
+  netif_linkoutput_fn linkoutput;
+#if LWIP_IPV6
+  /** This function is called by the IPv6 module when it wants
+   *  to send a packet on the interface. This function typically
+   *  first resolves the hardware address, then sends the packet.
+   *  For ethernet physical layer, this is usually ethip6_output() */
+  netif_output_ip6_fn output_ip6;
+#endif /* LWIP_IPV6 */
+#if LWIP_NETIF_STATUS_CALLBACK
+  /** This function is called when the netif state is set to up or down
+   */
+  netif_status_callback_fn status_callback;
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+#if LWIP_NETIF_LINK_CALLBACK
+  /** This function is called when the netif link is set to up or down
+   */
+  netif_status_callback_fn link_callback;
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+#if LWIP_NETIF_REMOVE_CALLBACK
+  /** This function is called when the netif has been removed */
+  netif_status_callback_fn remove_callback;
+#endif /* LWIP_NETIF_REMOVE_CALLBACK */
+  /** This field can be set by the device driver and could point
+   *  to state information for the device. */
+  void *state;
+#ifdef netif_get_client_data
+  void* client_data[LWIP_NETIF_CLIENT_DATA_INDEX_MAX + LWIP_NUM_NETIF_CLIENT_DATA];
+#endif
+#if LWIP_NETIF_HOSTNAME
+  /* the hostname for this netif, NULL is a valid value */
+  const char*  hostname;
+#endif /* LWIP_NETIF_HOSTNAME */
+#if LWIP_CHECKSUM_CTRL_PER_NETIF
+  u16_t chksum_flags;
+#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF*/
+  /** maximum transfer unit (in bytes) */
+  u16_t mtu;
+#if LWIP_IPV6 && LWIP_ND6_ALLOW_RA_UPDATES
+  /** maximum transfer unit (in bytes), updated by RA */
+  u16_t mtu6;
+#endif /* LWIP_IPV6 && LWIP_ND6_ALLOW_RA_UPDATES */
+  /** link level hardware address of this interface */
+  u8_t hwaddr[NETIF_MAX_HWADDR_LEN];
+  /** number of bytes used in hwaddr */
+  u8_t hwaddr_len;
+  /** flags (@see @ref netif_flags) */
+  u8_t flags;
+  /** descriptive abbreviation */
+  char name[2];
+  /** number of this interface. Used for @ref if_api and @ref netifapi_netif,
+   * as well as for IPv6 zones */
+  u8_t num;
+#if LWIP_IPV6_AUTOCONFIG
+  /** is this netif enabled for IPv6 autoconfiguration */
+  u8_t ip6_autoconfig_enabled;
+#endif /* LWIP_IPV6_AUTOCONFIG */
+#if LWIP_IPV6_SEND_ROUTER_SOLICIT
+  /** Number of Router Solicitation messages that remain to be sent. */
+  u8_t rs_count;
+#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
+#if MIB2_STATS
+  /** link type (from "snmp_ifType" enum from snmp_mib2.h) */
+  u8_t link_type;
+  /** (estimate) link speed */
+  u32_t link_speed;
+  /** timestamp at last change made (up/down) */
+  u32_t ts;
+  /** counters */
+  struct stats_mib2_netif_ctrs mib2_counters;
+#endif /* MIB2_STATS */
+#if LWIP_IPV4 && LWIP_IGMP
+  /** This function could be called to add or delete an entry in the multicast
+      filter table of the ethernet MAC.*/
+  netif_igmp_mac_filter_fn igmp_mac_filter;
+#endif /* LWIP_IPV4 && LWIP_IGMP */
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+  /** This function could be called to add or delete an entry in the IPv6 multicast
+      filter table of the ethernet MAC. */
+  netif_mld_mac_filter_fn mld_mac_filter;
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+#if LWIP_ACD
+  struct acd *acd_list;
+#endif /* LWIP_ACD */
+#if LWIP_NETIF_USE_HINTS
+  struct netif_hint *hints;
+#endif /* LWIP_NETIF_USE_HINTS */
+#if ENABLE_LOOPBACK
+  /* List of packets to be queued for ourselves. */
+  struct pbuf *loop_first;
+  struct pbuf *loop_last;
+#if LWIP_LOOPBACK_MAX_PBUFS
+  u16_t loop_cnt_current;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+#if LWIP_NETIF_LOOPBACK_MULTITHREADING
+  /* Used if the original scheduling failed. */
+  u8_t reschedule_poll;
+#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
+#endif /* ENABLE_LOOPBACK */
+};
+
+#if LWIP_CHECKSUM_CTRL_PER_NETIF
+#define NETIF_SET_CHECKSUM_CTRL(netif, chksumflags) do { \
+  (netif)->chksum_flags = chksumflags; } while(0)
+#define NETIF_CHECKSUM_ENABLED(netif, chksumflag) (((netif) == NULL) || (((netif)->chksum_flags & (chksumflag)) != 0))
+#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag) if NETIF_CHECKSUM_ENABLED(netif, chksumflag)
+#else /* LWIP_CHECKSUM_CTRL_PER_NETIF */
+#define NETIF_CHECKSUM_ENABLED(netif, chksumflag) 0
+#define NETIF_SET_CHECKSUM_CTRL(netif, chksumflags)
+#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag)
+#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */
+
+#if LWIP_SINGLE_NETIF
+#define NETIF_FOREACH(netif) if (((netif) = netif_default) != NULL)
+#else /* LWIP_SINGLE_NETIF */
+/** The list of network interfaces. */
+extern struct netif *netif_list;
+#define NETIF_FOREACH(netif) for ((netif) = netif_list; (netif) != NULL; (netif) = (netif)->next)
+#endif /* LWIP_SINGLE_NETIF */
+/** The default network interface. */
+extern struct netif *netif_default;
+
+void netif_init(void);
+
+struct netif *netif_add_noaddr(struct netif *netif, void *state, netif_init_fn init, netif_input_fn input);
+
+#if LWIP_IPV4
+struct netif *netif_add(struct netif *netif,
+                            const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw,
+                            void *state, netif_init_fn init, netif_input_fn input);
+void netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, const ip4_addr_t *netmask,
+                    const ip4_addr_t *gw);
+#else /* LWIP_IPV4 */
+struct netif *netif_add(struct netif *netif, void *state, netif_init_fn init, netif_input_fn input);
+#endif /* LWIP_IPV4 */
+void netif_remove(struct netif * netif);
+
+/* Returns a network interface given its name. The name is of the form
+   "et0", where the first two letters are the "name" field in the
+   netif structure, and the digit is in the num field in the same
+   structure. */
+struct netif *netif_find(const char *name);
+
+void netif_set_default(struct netif *netif);
+
+#if LWIP_IPV4
+void netif_set_ipaddr(struct netif *netif, const ip4_addr_t *ipaddr);
+void netif_set_netmask(struct netif *netif, const ip4_addr_t *netmask);
+void netif_set_gw(struct netif *netif, const ip4_addr_t *gw);
+/** @ingroup netif_ip4 */
+#define netif_ip4_addr(netif)    ((const ip4_addr_t*)ip_2_ip4(&((netif)->ip_addr)))
+/** @ingroup netif_ip4 */
+#define netif_ip4_netmask(netif) ((const ip4_addr_t*)ip_2_ip4(&((netif)->netmask)))
+/** @ingroup netif_ip4 */
+#define netif_ip4_gw(netif)      ((const ip4_addr_t*)ip_2_ip4(&((netif)->gw)))
+/** @ingroup netif_ip4 */
+#define netif_ip_addr4(netif)    ((const ip_addr_t*)&((netif)->ip_addr))
+/** @ingroup netif_ip4 */
+#define netif_ip_netmask4(netif) ((const ip_addr_t*)&((netif)->netmask))
+/** @ingroup netif_ip4 */
+#define netif_ip_gw4(netif)      ((const ip_addr_t*)&((netif)->gw))
+#endif /* LWIP_IPV4 */
+
+#define netif_set_flags(netif, set_flags)     do { (netif)->flags = (u8_t)((netif)->flags |  (set_flags)); } while(0)
+#define netif_clear_flags(netif, clr_flags)   do { (netif)->flags = (u8_t)((netif)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0)
+#define netif_is_flag_set(netif, flag)        (((netif)->flags & (flag)) != 0)
+
+void netif_set_up(struct netif *netif);
+void netif_set_down(struct netif *netif);
+/** @ingroup netif
+ * Ask if an interface is up
+ */
+#define netif_is_up(netif) (((netif)->flags & NETIF_FLAG_UP) ? (u8_t)1 : (u8_t)0)
+
+#if LWIP_NETIF_STATUS_CALLBACK
+void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback);
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+#if LWIP_NETIF_REMOVE_CALLBACK
+void netif_set_remove_callback(struct netif *netif, netif_status_callback_fn remove_callback);
+#endif /* LWIP_NETIF_REMOVE_CALLBACK */
+
+void netif_set_link_up(struct netif *netif);
+void netif_set_link_down(struct netif *netif);
+/** Ask if a link is up */
+#define netif_is_link_up(netif) (((netif)->flags & NETIF_FLAG_LINK_UP) ? (u8_t)1 : (u8_t)0)
+
+#if LWIP_NETIF_LINK_CALLBACK
+void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback);
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+
+#if LWIP_NETIF_HOSTNAME
+/** @ingroup netif */
+#define netif_set_hostname(netif, name) do { if((netif) != NULL) { (netif)->hostname = name; }}while(0)
+/** @ingroup netif */
+#define netif_get_hostname(netif) (((netif) != NULL) ? ((netif)->hostname) : NULL)
+#endif /* LWIP_NETIF_HOSTNAME */
+
+#if LWIP_IGMP
+/** @ingroup netif
+ * Set igmp mac filter function for a netif. */
+#define netif_set_igmp_mac_filter(netif, function) do { if((netif) != NULL) { (netif)->igmp_mac_filter = function; }}while(0)
+/** Get the igmp mac filter function for a netif. */
+#define netif_get_igmp_mac_filter(netif) (((netif) != NULL) ? ((netif)->igmp_mac_filter) : NULL)
+#endif /* LWIP_IGMP */
+
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+/** @ingroup netif
+ * Set mld mac filter function for a netif. */
+#define netif_set_mld_mac_filter(netif, function) do { if((netif) != NULL) { (netif)->mld_mac_filter = function; }}while(0)
+/** Get the mld mac filter function for a netif. */
+#define netif_get_mld_mac_filter(netif) (((netif) != NULL) ? ((netif)->mld_mac_filter) : NULL)
+#define netif_mld_mac_filter(netif, addr, action) do { if((netif) && (netif)->mld_mac_filter) { (netif)->mld_mac_filter((netif), (addr), (action)); }}while(0)
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+
+#if ENABLE_LOOPBACK
+err_t netif_loop_output(struct netif *netif, struct pbuf *p);
+void netif_poll(struct netif *netif);
+#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
+void netif_poll_all(void);
+#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
+#endif /* ENABLE_LOOPBACK */
+
+err_t netif_input(struct pbuf *p, struct netif *inp);
+
+#if LWIP_IPV6
+/** @ingroup netif_ip6 */
+#define netif_ip_addr6(netif, i)  ((const ip_addr_t*)(&((netif)->ip6_addr[i])))
+/** @ingroup netif_ip6 */
+#define netif_ip6_addr(netif, i)  ((const ip6_addr_t*)ip_2_ip6(&((netif)->ip6_addr[i])))
+void netif_ip6_addr_set(struct netif *netif, s8_t addr_idx, const ip6_addr_t *addr6);
+void netif_ip6_addr_set_parts(struct netif *netif, s8_t addr_idx, u32_t i0, u32_t i1, u32_t i2, u32_t i3);
+#define netif_ip6_addr_state(netif, i)  ((netif)->ip6_addr_state[i])
+void netif_ip6_addr_set_state(struct netif* netif, s8_t addr_idx, u8_t state);
+s8_t netif_get_ip6_addr_match(struct netif *netif, const ip6_addr_t *ip6addr);
+void netif_create_ip6_linklocal_address(struct netif *netif, u8_t from_mac_48bit);
+err_t netif_add_ip6_address(struct netif *netif, const ip6_addr_t *ip6addr, s8_t *chosen_idx);
+#define netif_set_ip6_autoconfig_enabled(netif, action) do { if(netif) { (netif)->ip6_autoconfig_enabled = (action); }}while(0)
+#if LWIP_IPV6_ADDRESS_LIFETIMES
+#define netif_ip6_addr_valid_life(netif, i)  \
+    (((netif) != NULL) ? ((netif)->ip6_addr_valid_life[i]) : IP6_ADDR_LIFE_STATIC)
+#define netif_ip6_addr_set_valid_life(netif, i, secs) \
+    do { if (netif != NULL) { (netif)->ip6_addr_valid_life[i] = (secs); }} while (0)
+#define netif_ip6_addr_pref_life(netif, i)  \
+    (((netif) != NULL) ? ((netif)->ip6_addr_pref_life[i]) : IP6_ADDR_LIFE_STATIC)
+#define netif_ip6_addr_set_pref_life(netif, i, secs) \
+    do { if (netif != NULL) { (netif)->ip6_addr_pref_life[i] = (secs); }} while (0)
+#define netif_ip6_addr_isstatic(netif, i)  \
+    (netif_ip6_addr_valid_life((netif), (i)) == IP6_ADDR_LIFE_STATIC)
+#else /* !LWIP_IPV6_ADDRESS_LIFETIMES */
+#define netif_ip6_addr_isstatic(netif, i)  (1) /* all addresses are static */
+#endif /* !LWIP_IPV6_ADDRESS_LIFETIMES */
+#if LWIP_ND6_ALLOW_RA_UPDATES
+#define netif_mtu6(netif) ((netif)->mtu6)
+#else /* LWIP_ND6_ALLOW_RA_UPDATES */
+#define netif_mtu6(netif) ((netif)->mtu)
+#endif /* LWIP_ND6_ALLOW_RA_UPDATES */
+#endif /* LWIP_IPV6 */
+
+#if LWIP_NETIF_USE_HINTS
+#define NETIF_SET_HINTS(netif, netifhint)  (netif)->hints = (netifhint)
+#define NETIF_RESET_HINTS(netif)      (netif)->hints = NULL
+#else /* LWIP_NETIF_USE_HINTS */
+#define NETIF_SET_HINTS(netif, netifhint)
+#define NETIF_RESET_HINTS(netif)
+#endif /* LWIP_NETIF_USE_HINTS */
+
+u8_t netif_name_to_index(const char *name);
+char * netif_index_to_name(u8_t idx, char *name);
+struct netif* netif_get_by_index(u8_t idx);
+
+/* Interface indexes always start at 1 per RFC 3493, section 4, num starts at 0 (internal index is 0..254)*/
+#define netif_get_index(netif)      ((u8_t)((netif)->num + 1))
+#define NETIF_NO_INDEX              (0)
+
+/**
+ * @ingroup netif
+ * Extended netif status callback (NSC) reasons flags.
+ * May be extended in the future!
+ */
+typedef u16_t netif_nsc_reason_t;
+
+/* used for initialization only */
+#define LWIP_NSC_NONE                     0x0000
+/** netif was added. arg: NULL. Called AFTER netif was added. */
+#define LWIP_NSC_NETIF_ADDED              0x0001
+/** netif was removed. arg: NULL. Called BEFORE netif is removed. */
+#define LWIP_NSC_NETIF_REMOVED            0x0002
+/** link changed */
+#define LWIP_NSC_LINK_CHANGED             0x0004
+/** netif administrative status changed.<br>
+  * up is called AFTER netif is set up.<br>
+  * down is called BEFORE the netif is actually set down. */
+#define LWIP_NSC_STATUS_CHANGED           0x0008
+/** IPv4 address has changed */
+#define LWIP_NSC_IPV4_ADDRESS_CHANGED     0x0010
+/** IPv4 gateway has changed */
+#define LWIP_NSC_IPV4_GATEWAY_CHANGED     0x0020
+/** IPv4 netmask has changed */
+#define LWIP_NSC_IPV4_NETMASK_CHANGED     0x0040
+/** called AFTER IPv4 address/gateway/netmask changes have been applied */
+#define LWIP_NSC_IPV4_SETTINGS_CHANGED    0x0080
+/** IPv6 address was added */
+#define LWIP_NSC_IPV6_SET                 0x0100
+/** IPv6 address state has changed */
+#define LWIP_NSC_IPV6_ADDR_STATE_CHANGED  0x0200
+/** IPv4 settings: valid address set, application may start to communicate */
+#define LWIP_NSC_IPV4_ADDR_VALID          0x0400
+
+/** @ingroup netif
+ * Argument supplied to netif_ext_callback_fn.
+ */
+typedef union
+{
+  /** Args to LWIP_NSC_LINK_CHANGED callback */
+  struct link_changed_s
+  {
+    /** 1: up; 0: down */
+    u8_t state;
+  } link_changed;
+  /** Args to LWIP_NSC_STATUS_CHANGED callback */
+  struct status_changed_s
+  {
+    /** 1: up; 0: down */
+    u8_t state;
+  } status_changed;
+  /** Args to LWIP_NSC_IPV4_ADDRESS_CHANGED|LWIP_NSC_IPV4_GATEWAY_CHANGED|LWIP_NSC_IPV4_NETMASK_CHANGED|LWIP_NSC_IPV4_SETTINGS_CHANGED callback */
+  struct ipv4_changed_s
+  {
+    /** Old IPv4 address */
+    const ip_addr_t* old_address;
+    const ip_addr_t* old_netmask;
+    const ip_addr_t* old_gw;
+  } ipv4_changed;
+  /** Args to LWIP_NSC_IPV6_SET callback */
+  struct ipv6_set_s
+  {
+    /** Index of changed IPv6 address */
+    s8_t addr_index;
+    /** Old IPv6 address */
+    const ip_addr_t* old_address;
+  } ipv6_set;
+  /** Args to LWIP_NSC_IPV6_ADDR_STATE_CHANGED callback */
+  struct ipv6_addr_state_changed_s
+  {
+    /** Index of affected IPv6 address */
+    s8_t addr_index;
+    /** Old IPv6 address state */
+    u8_t old_state;
+    /** Affected IPv6 address */
+    const ip_addr_t* address;
+  } ipv6_addr_state_changed;
+} netif_ext_callback_args_t;
+
+/**
+ * @ingroup netif
+ * Function used for extended netif status callbacks
+ * Note: When parsing reason argument, keep in mind that more reasons may be added in the future!
+ * @param netif netif that is affected by change
+ * @param reason change reason
+ * @param args depends on reason, see reason description
+ */
+typedef void (*netif_ext_callback_fn)(struct netif* netif, netif_nsc_reason_t reason, const netif_ext_callback_args_t* args);
+
+#if LWIP_NETIF_EXT_STATUS_CALLBACK
+struct netif_ext_callback;
+typedef struct netif_ext_callback
+{
+  netif_ext_callback_fn callback_fn;
+  struct netif_ext_callback* next;
+} netif_ext_callback_t;
+
+#define NETIF_DECLARE_EXT_CALLBACK(name) static netif_ext_callback_t name;
+void netif_add_ext_callback(netif_ext_callback_t* callback, netif_ext_callback_fn fn);
+void netif_remove_ext_callback(netif_ext_callback_t* callback);
+void netif_invoke_ext_callback(struct netif* netif, netif_nsc_reason_t reason, const netif_ext_callback_args_t* args);
+#else
+#define NETIF_DECLARE_EXT_CALLBACK(name)
+#define netif_add_ext_callback(callback, fn)
+#define netif_remove_ext_callback(callback)
+#define netif_invoke_ext_callback(netif, reason, args)
+#endif
+
+#if LWIP_TESTMODE && LWIP_HAVE_LOOPIF
+struct netif* netif_get_loopif(void);
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_NETIF_H */

src/lwip/include/lwip/netifapi.h

@@ -0,0 +1,161 @@
+/**
+ * @file
+ * netif API (to be used from non-TCPIP threads)
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+#ifndef LWIP_HDR_NETIFAPI_H
+#define LWIP_HDR_NETIFAPI_H
+
+#include "lwip/opt.h"
+
+#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sys.h"
+#include "lwip/netif.h"
+#include "lwip/dhcp.h"
+#include "lwip/autoip.h"
+#include "lwip/priv/tcpip_priv.h"
+#include "lwip/priv/api_msg.h"
+#include "lwip/prot/ethernet.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* API for application */
+#if LWIP_ARP && LWIP_IPV4
+/* Used for netfiapi_arp_* APIs */
+enum netifapi_arp_entry {
+  NETIFAPI_ARP_PERM /* Permanent entry */
+  /* Other entry types can be added here */
+};
+
+/** @ingroup netifapi_arp */
+err_t netifapi_arp_add(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr, enum netifapi_arp_entry type);
+/** @ingroup netifapi_arp */
+err_t netifapi_arp_remove(const ip4_addr_t *ipaddr, enum netifapi_arp_entry type);
+#endif /* LWIP_ARP && LWIP_IPV4 */
+
+err_t netifapi_netif_add(struct netif *netif,
+#if LWIP_IPV4
+                         const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw,
+#endif /* LWIP_IPV4 */
+                         void *state, netif_init_fn init, netif_input_fn input);
+
+#if LWIP_IPV4
+err_t netifapi_netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr,
+                              const ip4_addr_t *netmask, const ip4_addr_t *gw);
+#endif /* LWIP_IPV4*/
+
+err_t netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc,
+                            netifapi_errt_fn errtfunc);
+
+/** @ingroup netifapi_netif */
+err_t netifapi_netif_name_to_index(const char *name, u8_t *index);
+/** @ingroup netifapi_netif */
+err_t netifapi_netif_index_to_name(u8_t index, char *name);
+
+/** @ingroup netifapi_netif
+  * @see netif_remove()
+  */
+#define netifapi_netif_remove(n)        netifapi_netif_common(n, netif_remove, NULL)
+/** @ingroup netifapi_netif
+  * @see netif_set_up()
+  */
+#define netifapi_netif_set_up(n)        netifapi_netif_common(n, netif_set_up, NULL)
+/** @ingroup netifapi_netif
+  * @see netif_set_down()
+  */
+#define netifapi_netif_set_down(n)      netifapi_netif_common(n, netif_set_down, NULL)
+/** @ingroup netifapi_netif
+  * @see netif_set_default()
+  */
+#define netifapi_netif_set_default(n)   netifapi_netif_common(n, netif_set_default, NULL)
+/** @ingroup netifapi_netif
+  * @see netif_set_link_up()
+  */
+#define netifapi_netif_set_link_up(n)   netifapi_netif_common(n, netif_set_link_up, NULL)
+/** @ingroup netifapi_netif
+  * @see netif_set_link_down()
+  */
+#define netifapi_netif_set_link_down(n) netifapi_netif_common(n, netif_set_link_down, NULL)
+
+/**
+ * @defgroup netifapi_dhcp4 DHCPv4
+ * @ingroup netifapi
+ * To be called from non-TCPIP threads
+ */
+/** @ingroup netifapi_dhcp4
+  * @see dhcp_start()
+  */
+#define netifapi_dhcp_start(n)            netifapi_netif_common(n, NULL, dhcp_start)
+/**
+ * @ingroup netifapi_dhcp4
+ * @deprecated Use netifapi_dhcp_release_and_stop() instead.
+ */
+#define netifapi_dhcp_stop(n)             netifapi_netif_common(n, dhcp_stop, NULL)
+/** @ingroup netifapi_dhcp4
+  * @see dhcp_inform()
+  */
+#define netifapi_dhcp_inform(n)           netifapi_netif_common(n, dhcp_inform, NULL)
+/** @ingroup netifapi_dhcp4
+  * @see dhcp_renew()
+  */
+#define netifapi_dhcp_renew(n)            netifapi_netif_common(n, NULL, dhcp_renew)
+/**
+ * @ingroup netifapi_dhcp4
+ * @deprecated Use netifapi_dhcp_release_and_stop() instead.
+ */
+#define netifapi_dhcp_release(n)          netifapi_netif_common(n, NULL, dhcp_release)
+/** @ingroup netifapi_dhcp4
+  * @see dhcp_release_and_stop()
+  */
+#define netifapi_dhcp_release_and_stop(n) netifapi_netif_common(n, dhcp_release_and_stop, NULL)
+
+/**
+ * @defgroup netifapi_autoip AUTOIP
+ * @ingroup netifapi
+ * To be called from non-TCPIP threads
+ */
+/** @ingroup netifapi_autoip
+  * @see autoip_start()
+  */
+#define netifapi_autoip_start(n)      netifapi_netif_common(n, NULL, autoip_start)
+/** @ingroup netifapi_autoip
+  * @see autoip_stop()
+  */
+#define netifapi_autoip_stop(n)       netifapi_netif_common(n, NULL, autoip_stop)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_NETIF_API */
+
+#endif /* LWIP_HDR_NETIFAPI_H */

src/lwip/include/lwip/pbuf.h

@@ -0,0 +1,326 @@
+/**
+ * @file
+ * pbuf API
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef LWIP_HDR_PBUF_H
+#define LWIP_HDR_PBUF_H
+
+#include "lwip/opt.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** LWIP_SUPPORT_CUSTOM_PBUF==1: Custom pbufs behave much like their pbuf type
+ * but they are allocated by external code (initialised by calling
+ * pbuf_alloced_custom()) and when pbuf_free gives up their last reference, they
+ * are freed by calling pbuf_custom->custom_free_function().
+ * Currently, the pbuf_custom code is only needed for one specific configuration
+ * of IP_FRAG, unless required by external driver/application code. */
+#ifndef LWIP_SUPPORT_CUSTOM_PBUF
+#define LWIP_SUPPORT_CUSTOM_PBUF ((IP_FRAG && !LWIP_NETIF_TX_SINGLE_PBUF) || (LWIP_IPV6 && LWIP_IPV6_FRAG))
+#endif
+
+/** @ingroup pbuf
+ * PBUF_NEEDS_COPY(p): return a boolean value indicating whether the given
+ * pbuf needs to be copied in order to be kept around beyond the current call
+ * stack without risking being corrupted. The default setting provides safety:
+ * it will make a copy iof any pbuf chain that does not consist entirely of
+ * PBUF_ROM type pbufs. For setups with zero-copy support, it may be redefined
+ * to evaluate to true in all cases, for example. However, doing so also has an
+ * effect on the application side: any buffers that are *not* copied must also
+ * *not* be reused by the application after passing them to lwIP. For example,
+ * when setting PBUF_NEEDS_COPY to (0), after using udp_send() with a PBUF_RAM
+ * pbuf, the application must free the pbuf immediately, rather than reusing it
+ * for other purposes. For more background information on this, see tasks #6735
+ * and #7896, and bugs #11400 and #49914. */
+#ifndef PBUF_NEEDS_COPY
+#define PBUF_NEEDS_COPY(p)  ((p)->type_internal & PBUF_TYPE_FLAG_DATA_VOLATILE)
+#endif /* PBUF_NEEDS_COPY */
+
+/* @todo: We need a mechanism to prevent wasting memory in every pbuf
+   (TCP vs. UDP, IPv4 vs. IPv6: UDP/IPv4 packets may waste up to 28 bytes) */
+
+#define PBUF_TRANSPORT_HLEN 20
+#if LWIP_IPV6
+#define PBUF_IP_HLEN        40
+#else
+#define PBUF_IP_HLEN        20
+#endif
+
+/**
+ * @ingroup pbuf
+ * Enumeration of pbuf layers
+ */
+typedef enum {
+  /** Includes spare room for transport layer header, e.g. UDP header.
+   * Use this if you intend to pass the pbuf to functions like udp_send().
+   */
+  PBUF_TRANSPORT = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN,
+  /** Includes spare room for IP header.
+   * Use this if you intend to pass the pbuf to functions like raw_send().
+   */
+  PBUF_IP = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN,
+  /** Includes spare room for link layer header (ethernet header).
+   * Use this if you intend to pass the pbuf to functions like ethernet_output().
+   * @see PBUF_LINK_HLEN
+   */
+  PBUF_LINK = PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN,
+  /** Includes spare room for additional encapsulation header before ethernet
+   * headers (e.g. 802.11).
+   * Use this if you intend to pass the pbuf to functions like netif->linkoutput().
+   * @see PBUF_LINK_ENCAPSULATION_HLEN
+   */
+  PBUF_RAW_TX = PBUF_LINK_ENCAPSULATION_HLEN,
+  /** Use this for input packets in a netif driver when calling netif->input()
+   * in the most common case - ethernet-layer netif driver. */
+  PBUF_RAW = 0
+} pbuf_layer;
+
+
+/* Base flags for pbuf_type definitions: */
+
+/** Indicates that the payload directly follows the struct pbuf.
+ *  This makes @ref pbuf_header work in both directions. */
+#define PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS       0x80
+/** Indicates the data stored in this pbuf can change. If this pbuf needs
+ * to be queued, it must be copied/duplicated. */
+#define PBUF_TYPE_FLAG_DATA_VOLATILE                0x40
+/** 4 bits are reserved for 16 allocation sources (e.g. heap, pool1, pool2, etc)
+ * Internally, we use: 0=heap, 1=MEMP_PBUF, 2=MEMP_PBUF_POOL -> 13 types free*/
+#define PBUF_TYPE_ALLOC_SRC_MASK                    0x0F
+/** Indicates this pbuf is used for RX (if not set, indicates use for TX).
+ * This information can be used to keep some spare RX buffers e.g. for
+ * receiving TCP ACKs to unblock a connection) */
+#define PBUF_ALLOC_FLAG_RX                          0x0100
+/** Indicates the application needs the pbuf payload to be in one piece */
+#define PBUF_ALLOC_FLAG_DATA_CONTIGUOUS             0x0200
+
+#define PBUF_TYPE_ALLOC_SRC_MASK_STD_HEAP           0x00
+#define PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF      0x01
+#define PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF_POOL 0x02
+/** First pbuf allocation type for applications */
+#define PBUF_TYPE_ALLOC_SRC_MASK_APP_MIN            0x03
+/** Last pbuf allocation type for applications */
+#define PBUF_TYPE_ALLOC_SRC_MASK_APP_MAX            PBUF_TYPE_ALLOC_SRC_MASK
+
+/**
+ * @ingroup pbuf
+ * Enumeration of pbuf types
+ */
+typedef enum {
+  /** pbuf data is stored in RAM, used for TX mostly, struct pbuf and its payload
+      are allocated in one piece of contiguous memory (so the first payload byte
+      can be calculated from struct pbuf).
+      pbuf_alloc() allocates PBUF_RAM pbufs as unchained pbufs (although that might
+      change in future versions).
+      This should be used for all OUTGOING packets (TX).*/
+  PBUF_RAM = (PBUF_ALLOC_FLAG_DATA_CONTIGUOUS | PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS | PBUF_TYPE_ALLOC_SRC_MASK_STD_HEAP),
+  /** pbuf data is stored in ROM, i.e. struct pbuf and its payload are located in
+      totally different memory areas. Since it points to ROM, payload does not
+      have to be copied when queued for transmission. */
+  PBUF_ROM = PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF,
+  /** pbuf comes from the pbuf pool. Much like PBUF_ROM but payload might change
+      so it has to be duplicated when queued before transmitting, depending on
+      who has a 'ref' to it. */
+  PBUF_REF = (PBUF_TYPE_FLAG_DATA_VOLATILE | PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF),
+  /** pbuf payload refers to RAM. This one comes from a pool and should be used
+      for RX. Payload can be chained (scatter-gather RX) but like PBUF_RAM, struct
+      pbuf and its payload are allocated in one piece of contiguous memory (so
+      the first payload byte can be calculated from struct pbuf).
+      Don't use this for TX, if the pool becomes empty e.g. because of TCP queuing,
+      you are unable to receive TCP acks! */
+  PBUF_POOL = (PBUF_ALLOC_FLAG_RX | PBUF_TYPE_FLAG_STRUCT_DATA_CONTIGUOUS | PBUF_TYPE_ALLOC_SRC_MASK_STD_MEMP_PBUF_POOL)
+} pbuf_type;
+
+
+/** indicates this packet's data should be immediately passed to the application */
+#define PBUF_FLAG_PUSH      0x01U
+/** indicates this is a custom pbuf: pbuf_free calls pbuf_custom->custom_free_function()
+    when the last reference is released (plus custom PBUF_RAM cannot be trimmed) */
+#define PBUF_FLAG_IS_CUSTOM 0x02U
+/** indicates this pbuf is UDP multicast to be looped back */
+#define PBUF_FLAG_MCASTLOOP 0x04U
+/** indicates this pbuf was received as link-level broadcast */
+#define PBUF_FLAG_LLBCAST   0x08U
+/** indicates this pbuf was received as link-level multicast */
+#define PBUF_FLAG_LLMCAST   0x10U
+/** indicates this pbuf includes a TCP FIN flag */
+#define PBUF_FLAG_TCP_FIN   0x20U
+
+/** Main packet buffer struct */
+struct pbuf {
+  /** next pbuf in singly linked pbuf chain */
+  struct pbuf *next;
+
+  /** pointer to the actual data in the buffer */
+  void *payload;
+
+  /**
+   * total length of this buffer and all next buffers in chain
+   * belonging to the same packet.
+   *
+   * For non-queue packet chains this is the invariant:
+   * p->tot_len == p->len + (p->next? p->next->tot_len: 0)
+   */
+  u16_t tot_len;
+
+  /** length of this buffer */
+  u16_t len;
+
+  /** a bit field indicating pbuf type and allocation sources
+      (see PBUF_TYPE_FLAG_*, PBUF_ALLOC_FLAG_* and PBUF_TYPE_ALLOC_SRC_MASK)
+    */
+  u8_t type_internal;
+
+  /** misc flags */
+  u8_t flags;
+
+  /**
+   * the reference count always equals the number of pointers
+   * that refer to this pbuf. This can be pointers from an application,
+   * the stack itself, or pbuf->next pointers from a chain.
+   */
+  LWIP_PBUF_REF_T ref;
+
+  /** For incoming packets, this contains the input netif's index */
+  u8_t if_idx;
+
+  /** In case the user needs to store data custom data on a pbuf */
+  LWIP_PBUF_CUSTOM_DATA
+};
+
+
+/** Helper struct for const-correctness only.
+ * The only meaning of this one is to provide a const payload pointer
+ * for PBUF_ROM type.
+ */
+struct pbuf_rom {
+  /** next pbuf in singly linked pbuf chain */
+  struct pbuf *next;
+
+  /** pointer to the actual data in the buffer */
+  const void *payload;
+};
+
+#if LWIP_SUPPORT_CUSTOM_PBUF
+/** Prototype for a function to free a custom pbuf */
+typedef void (*pbuf_free_custom_fn)(struct pbuf *p);
+
+/** A custom pbuf: like a pbuf, but following a function pointer to free it. */
+struct pbuf_custom {
+  /** The actual pbuf */
+  struct pbuf pbuf;
+  /** This function is called when pbuf_free deallocates this pbuf(_custom) */
+  pbuf_free_custom_fn custom_free_function;
+};
+#endif /* LWIP_SUPPORT_CUSTOM_PBUF */
+
+/** Define this to 0 to prevent freeing ooseq pbufs when the PBUF_POOL is empty */
+#ifndef PBUF_POOL_FREE_OOSEQ
+#define PBUF_POOL_FREE_OOSEQ 1
+#endif /* PBUF_POOL_FREE_OOSEQ */
+#if LWIP_TCP && TCP_QUEUE_OOSEQ && NO_SYS && PBUF_POOL_FREE_OOSEQ
+extern volatile u8_t pbuf_free_ooseq_pending;
+void pbuf_free_ooseq(void);
+/** When not using sys_check_timeouts(), call PBUF_CHECK_FREE_OOSEQ()
+    at regular intervals from main level to check if ooseq pbufs need to be
+    freed! */
+#define PBUF_CHECK_FREE_OOSEQ() do { if(pbuf_free_ooseq_pending) { \
+  /* pbuf_alloc() reported PBUF_POOL to be empty -> try to free some \
+     ooseq queued pbufs now */ \
+  pbuf_free_ooseq(); }}while(0)
+#else /* LWIP_TCP && TCP_QUEUE_OOSEQ && NO_SYS && PBUF_POOL_FREE_OOSEQ */
+  /* Otherwise declare an empty PBUF_CHECK_FREE_OOSEQ */
+  #define PBUF_CHECK_FREE_OOSEQ()
+#endif /* LWIP_TCP && TCP_QUEUE_OOSEQ && NO_SYS && PBUF_POOL_FREE_OOSEQ*/
+
+/* Initializes the pbuf module. This call is empty for now, but may not be in future. */
+#define pbuf_init()
+
+struct pbuf *pbuf_alloc(pbuf_layer l, u16_t length, pbuf_type type);
+struct pbuf *pbuf_alloc_reference(void *payload, u16_t length, pbuf_type type);
+#if LWIP_SUPPORT_CUSTOM_PBUF
+struct pbuf *pbuf_alloced_custom(pbuf_layer l, u16_t length, pbuf_type type,
+                                 struct pbuf_custom *p, void *payload_mem,
+                                 u16_t payload_mem_len);
+#endif /* LWIP_SUPPORT_CUSTOM_PBUF */
+void pbuf_realloc(struct pbuf *p, u16_t size);
+#define pbuf_get_allocsrc(p)          ((p)->type_internal & PBUF_TYPE_ALLOC_SRC_MASK)
+#define pbuf_match_allocsrc(p, type)  (pbuf_get_allocsrc(p) == ((type) & PBUF_TYPE_ALLOC_SRC_MASK))
+#define pbuf_match_type(p, type)      pbuf_match_allocsrc(p, type)
+u8_t pbuf_header(struct pbuf *p, s16_t header_size);
+u8_t pbuf_header_force(struct pbuf *p, s16_t header_size);
+u8_t pbuf_add_header(struct pbuf *p, size_t header_size_increment);
+u8_t pbuf_add_header_force(struct pbuf *p, size_t header_size_increment);
+u8_t pbuf_remove_header(struct pbuf *p, size_t header_size);
+struct pbuf *pbuf_free_header(struct pbuf *q, u16_t size);
+void pbuf_ref(struct pbuf *p);
+u8_t pbuf_free(struct pbuf *p);
+u16_t pbuf_clen(const struct pbuf *p);
+void pbuf_cat(struct pbuf *head, struct pbuf *tail);
+void pbuf_chain(struct pbuf *head, struct pbuf *tail);
+struct pbuf *pbuf_dechain(struct pbuf *p);
+err_t pbuf_copy(struct pbuf *p_to, const struct pbuf *p_from);
+err_t pbuf_copy_partial_pbuf(struct pbuf *p_to, const struct pbuf *p_from, u16_t copy_len, u16_t offset);
+u16_t pbuf_copy_partial(const struct pbuf *p, void *dataptr, u16_t len, u16_t offset);
+void *pbuf_get_contiguous(const struct pbuf *p, void *buffer, size_t bufsize, u16_t len, u16_t offset);
+err_t pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len);
+err_t pbuf_take_at(struct pbuf *buf, const void *dataptr, u16_t len, u16_t offset);
+struct pbuf *pbuf_skip(struct pbuf* in, u16_t in_offset, u16_t* out_offset);
+struct pbuf *pbuf_coalesce(struct pbuf *p, pbuf_layer layer);
+struct pbuf *pbuf_clone(pbuf_layer l, pbuf_type type, struct pbuf *p);
+#if LWIP_CHECKSUM_ON_COPY
+err_t pbuf_fill_chksum(struct pbuf *p, u16_t start_offset, const void *dataptr,
+                       u16_t len, u16_t *chksum);
+#endif /* LWIP_CHECKSUM_ON_COPY */
+#if LWIP_TCP && TCP_QUEUE_OOSEQ && LWIP_WND_SCALE
+void pbuf_split_64k(struct pbuf *p, struct pbuf **rest);
+#endif /* LWIP_TCP && TCP_QUEUE_OOSEQ && LWIP_WND_SCALE */
+
+u8_t pbuf_get_at(const struct pbuf* p, u16_t offset);
+int pbuf_try_get_at(const struct pbuf* p, u16_t offset);
+void pbuf_put_at(struct pbuf* p, u16_t offset, u8_t data);
+u16_t pbuf_memcmp(const struct pbuf* p, u16_t offset, const void* s2, u16_t n);
+u16_t pbuf_memfind(const struct pbuf* p, const void* mem, u16_t mem_len, u16_t start_offset);
+u16_t pbuf_strstr(const struct pbuf* p, const char* substr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_PBUF_H */

src/lwip/include/lwip/priv/altcp_priv.h

@@ -0,0 +1,159 @@
+/**
+ * @file
+ * Application layered TCP connection API (to be used from TCPIP thread)<br>
+ * This interface mimics the tcp callback API to the application while preventing
+ * direct linking (much like virtual functions).
+ * This way, an application can make use of other application layer protocols
+ * on top of TCP without knowing the details (e.g. TLS, proxy connection).
+ */
+
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+#ifndef LWIP_HDR_ALTCP_PRIV_H
+#define LWIP_HDR_ALTCP_PRIV_H
+
+#include "lwip/opt.h"
+
+#if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/altcp.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct altcp_pcb *altcp_alloc(void);
+void altcp_free(struct altcp_pcb *conn);
+
+/* Function prototypes for application layers */
+typedef void (*altcp_set_poll_fn)(struct altcp_pcb *conn, u8_t interval);
+typedef void (*altcp_recved_fn)(struct altcp_pcb *conn, u16_t len);
+typedef err_t (*altcp_bind_fn)(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port);
+typedef err_t (*altcp_connect_fn)(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port, altcp_connected_fn connected);
+
+typedef struct altcp_pcb *(*altcp_listen_fn)(struct altcp_pcb *conn, u8_t backlog, err_t *err);
+
+typedef void  (*altcp_abort_fn)(struct altcp_pcb *conn);
+typedef err_t (*altcp_close_fn)(struct altcp_pcb *conn);
+typedef err_t (*altcp_shutdown_fn)(struct altcp_pcb *conn, int shut_rx, int shut_tx);
+
+typedef err_t (*altcp_write_fn)(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags);
+typedef err_t (*altcp_output_fn)(struct altcp_pcb *conn);
+
+typedef u16_t (*altcp_mss_fn)(struct altcp_pcb *conn);
+typedef u16_t (*altcp_sndbuf_fn)(struct altcp_pcb *conn);
+typedef u16_t (*altcp_sndqueuelen_fn)(struct altcp_pcb *conn);
+typedef void  (*altcp_nagle_disable_fn)(struct altcp_pcb *conn);
+typedef void  (*altcp_nagle_enable_fn)(struct altcp_pcb *conn);
+typedef int   (*altcp_nagle_disabled_fn)(struct altcp_pcb *conn);
+
+typedef void  (*altcp_setprio_fn)(struct altcp_pcb *conn, u8_t prio);
+
+typedef void  (*altcp_dealloc_fn)(struct altcp_pcb *conn);
+
+typedef err_t (*altcp_get_tcp_addrinfo_fn)(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port);
+typedef ip_addr_t *(*altcp_get_ip_fn)(struct altcp_pcb *conn, int local);
+typedef u16_t (*altcp_get_port_fn)(struct altcp_pcb *conn, int local);
+
+#if LWIP_TCP_KEEPALIVE
+typedef void  (*altcp_keepalive_disable_fn)(struct altcp_pcb *conn);
+typedef void  (*altcp_keepalive_enable_fn)(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count);
+#endif
+
+#ifdef LWIP_DEBUG
+typedef enum tcp_state (*altcp_dbg_get_tcp_state_fn)(struct altcp_pcb *conn);
+#endif
+
+struct altcp_functions {
+  altcp_set_poll_fn           set_poll;
+  altcp_recved_fn             recved;
+  altcp_bind_fn               bind;
+  altcp_connect_fn            connect;
+  altcp_listen_fn             listen;
+  altcp_abort_fn              abort;
+  altcp_close_fn              close;
+  altcp_shutdown_fn           shutdown;
+  altcp_write_fn              write;
+  altcp_output_fn             output;
+  altcp_mss_fn                mss;
+  altcp_sndbuf_fn             sndbuf;
+  altcp_sndqueuelen_fn        sndqueuelen;
+  altcp_nagle_disable_fn      nagle_disable;
+  altcp_nagle_enable_fn       nagle_enable;
+  altcp_nagle_disabled_fn     nagle_disabled;
+  altcp_setprio_fn            setprio;
+  altcp_dealloc_fn            dealloc;
+  altcp_get_tcp_addrinfo_fn   addrinfo;
+  altcp_get_ip_fn             getip;
+  altcp_get_port_fn           getport;
+#if LWIP_TCP_KEEPALIVE
+  altcp_keepalive_disable_fn  keepalive_disable;
+  altcp_keepalive_enable_fn   keepalive_enable;
+#endif
+#ifdef LWIP_DEBUG
+  altcp_dbg_get_tcp_state_fn  dbg_get_tcp_state;
+#endif
+};
+
+void  altcp_default_set_poll(struct altcp_pcb *conn, u8_t interval);
+void  altcp_default_recved(struct altcp_pcb *conn, u16_t len);
+err_t altcp_default_bind(struct altcp_pcb *conn, const ip_addr_t *ipaddr, u16_t port);
+err_t altcp_default_shutdown(struct altcp_pcb *conn, int shut_rx, int shut_tx);
+err_t altcp_default_write(struct altcp_pcb *conn, const void *dataptr, u16_t len, u8_t apiflags);
+err_t altcp_default_output(struct altcp_pcb *conn);
+u16_t altcp_default_mss(struct altcp_pcb *conn);
+u16_t altcp_default_sndbuf(struct altcp_pcb *conn);
+u16_t altcp_default_sndqueuelen(struct altcp_pcb *conn);
+void  altcp_default_nagle_disable(struct altcp_pcb *conn);
+void  altcp_default_nagle_enable(struct altcp_pcb *conn);
+int   altcp_default_nagle_disabled(struct altcp_pcb *conn);
+void  altcp_default_setprio(struct altcp_pcb *conn, u8_t prio);
+void  altcp_default_dealloc(struct altcp_pcb *conn);
+err_t altcp_default_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port);
+ip_addr_t *altcp_default_get_ip(struct altcp_pcb *conn, int local);
+u16_t altcp_default_get_port(struct altcp_pcb *conn, int local);
+#if LWIP_TCP_KEEPALIVE
+void  altcp_default_keepalive_disable(struct altcp_pcb *conn);
+void  altcp_default_keepalive_enable(struct altcp_pcb *conn, u32_t idle, u32_t intvl, u32_t count);
+#endif
+#ifdef LWIP_DEBUG
+enum tcp_state altcp_default_dbg_get_tcp_state(struct altcp_pcb *conn);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ALTCP */
+
+#endif /* LWIP_HDR_ALTCP_PRIV_H */

src/lwip/include/lwip/priv/api_msg.h

@@ -0,0 +1,272 @@
+/**
+ * @file
+ * netconn API lwIP internal implementations (do not use in application code)
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_HDR_API_MSG_H
+#define LWIP_HDR_API_MSG_H
+
+#include "lwip/opt.h"
+
+#include "lwip/arch.h"
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+#include "lwip/sys.h"
+#include "lwip/igmp.h"
+#include "lwip/api.h"
+#include "lwip/priv/tcpip_priv.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_NETCONN || LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
+/* Note: Netconn API is always available when sockets are enabled -
+ * sockets are implemented on top of them */
+
+#if LWIP_MPU_COMPATIBLE
+#if LWIP_NETCONN_SEM_PER_THREAD
+#define API_MSG_M_DEF_SEM(m)  *m
+#else
+#define API_MSG_M_DEF_SEM(m)  API_MSG_M_DEF(m)
+#endif
+#else /* LWIP_MPU_COMPATIBLE */
+#define API_MSG_M_DEF_SEM(m)  API_MSG_M_DEF(m)
+#endif /* LWIP_MPU_COMPATIBLE */
+
+/* For the netconn API, these values are use as a bitmask! */
+#define NETCONN_SHUT_RD   1
+#define NETCONN_SHUT_WR   2
+#define NETCONN_SHUT_RDWR (NETCONN_SHUT_RD | NETCONN_SHUT_WR)
+
+/* IP addresses and port numbers are expected to be in
+ * the same byte order as in the corresponding pcb.
+ */
+/** This struct includes everything that is necessary to execute a function
+    for a netconn in another thread context (mainly used to process netconns
+    in the tcpip_thread context to be thread safe). */
+struct api_msg {
+  /** The netconn which to process - always needed: it includes the semaphore
+      which is used to block the application thread until the function finished. */
+  struct netconn *conn;
+  /** The return value of the function executed in tcpip_thread. */
+  err_t err;
+  /** Depending on the executed function, one of these union members is used */
+  union {
+    /** used for lwip_netconn_do_send */
+    struct netbuf *b;
+    /** used for lwip_netconn_do_newconn */
+    struct {
+      u8_t proto;
+    } n;
+    /** used for lwip_netconn_do_bind and lwip_netconn_do_connect */
+    struct {
+      API_MSG_M_DEF_C(ip_addr_t, ipaddr);
+      u16_t port;
+      u8_t if_idx;
+    } bc;
+    /** used for lwip_netconn_do_getaddr */
+    struct {
+      ip_addr_t API_MSG_M_DEF(ipaddr);
+      u16_t API_MSG_M_DEF(port);
+      u8_t local;
+    } ad;
+    /** used for lwip_netconn_do_write */
+    struct {
+      /** current vector to write */
+      const struct netvector *vector;
+      /** number of unwritten vectors */
+      u16_t vector_cnt;
+      /** offset into current vector */
+      size_t vector_off;
+      /** total length across vectors */
+      size_t len;
+      /** offset into total length/output of bytes written when err == ERR_OK */
+      size_t offset;
+      u8_t apiflags;
+#if LWIP_SO_SNDTIMEO
+      u32_t time_started;
+#endif /* LWIP_SO_SNDTIMEO */
+    } w;
+    /** used for lwip_netconn_do_recv */
+    struct {
+      size_t len;
+    } r;
+#if LWIP_TCP
+    /** used for lwip_netconn_do_close (/shutdown) */
+    struct {
+      u8_t shut;
+#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER
+      u32_t time_started;
+#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
+      u8_t polls_left;
+#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
+    } sd;
+#endif /* LWIP_TCP */
+#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
+    /** used for lwip_netconn_do_join_leave_group */
+    struct {
+      API_MSG_M_DEF_C(ip_addr_t, multiaddr);
+      API_MSG_M_DEF_C(ip_addr_t, netif_addr);
+      u8_t if_idx;
+      enum netconn_igmp join_or_leave;
+    } jl;
+#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
+#if TCP_LISTEN_BACKLOG
+    struct {
+      u8_t backlog;
+    } lb;
+#endif /* TCP_LISTEN_BACKLOG */
+  } msg;
+#if LWIP_NETCONN_SEM_PER_THREAD
+  sys_sem_t* op_completed_sem;
+#endif /* LWIP_NETCONN_SEM_PER_THREAD */
+};
+
+#if LWIP_NETCONN_SEM_PER_THREAD
+#define LWIP_API_MSG_SEM(msg)          ((msg)->op_completed_sem)
+#else /* LWIP_NETCONN_SEM_PER_THREAD */
+#define LWIP_API_MSG_SEM(msg)          (&(msg)->conn->op_completed)
+#endif /* LWIP_NETCONN_SEM_PER_THREAD */
+
+
+#if LWIP_DNS
+/** As lwip_netconn_do_gethostbyname requires more arguments but doesn't require a netconn,
+    it has its own struct (to avoid struct api_msg getting bigger than necessary).
+    lwip_netconn_do_gethostbyname must be called using tcpip_callback instead of tcpip_apimsg
+    (see netconn_gethostbyname). */
+struct dns_api_msg {
+  /** Hostname to query or dotted IP address string */
+#if LWIP_MPU_COMPATIBLE
+  char name[DNS_MAX_NAME_LENGTH];
+#else /* LWIP_MPU_COMPATIBLE */
+  const char *name;
+#endif /* LWIP_MPU_COMPATIBLE */
+  /** The resolved address is stored here */
+  ip_addr_t API_MSG_M_DEF(addr);
+#if LWIP_IPV4 && LWIP_IPV6
+  /** Type of resolve call */
+  u8_t dns_addrtype;
+#endif /* LWIP_IPV4 && LWIP_IPV6 */
+  /** This semaphore is posted when the name is resolved, the application thread
+      should wait on it. */
+  sys_sem_t API_MSG_M_DEF_SEM(sem);
+  /** Errors are given back here */
+  err_t API_MSG_M_DEF(err);
+};
+#endif /* LWIP_DNS */
+
+#if LWIP_NETCONN_FULLDUPLEX
+int lwip_netconn_is_deallocated_msg(void *msg);
+#endif
+int lwip_netconn_is_err_msg(void *msg, err_t *err);
+void lwip_netconn_do_newconn         (void *m);
+void lwip_netconn_do_delconn         (void *m);
+void lwip_netconn_do_bind            (void *m);
+void lwip_netconn_do_bind_if         (void *m);
+void lwip_netconn_do_connect         (void *m);
+void lwip_netconn_do_disconnect      (void *m);
+void lwip_netconn_do_listen          (void *m);
+void lwip_netconn_do_send            (void *m);
+void lwip_netconn_do_recv            (void *m);
+#if TCP_LISTEN_BACKLOG
+void lwip_netconn_do_accepted        (void *m);
+#endif /* TCP_LISTEN_BACKLOG */
+void lwip_netconn_do_write           (void *m);
+void lwip_netconn_do_getaddr         (void *m);
+void lwip_netconn_do_close           (void *m);
+void lwip_netconn_do_shutdown        (void *m);
+#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
+void lwip_netconn_do_join_leave_group(void *m);
+void lwip_netconn_do_join_leave_group_netif(void *m);
+#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
+
+#if LWIP_DNS
+void lwip_netconn_do_gethostbyname(void *arg);
+#endif /* LWIP_DNS */
+
+struct netconn* netconn_alloc(enum netconn_type t, netconn_callback callback);
+void netconn_free(struct netconn *conn);
+
+#endif /* LWIP_NETCONN || LWIP_SOCKET */
+
+#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
+
+/* netifapi related lwIP internal definitions */
+
+#if LWIP_MPU_COMPATIBLE
+#define NETIFAPI_IPADDR_DEF(type, m)  type m
+#else /* LWIP_MPU_COMPATIBLE */
+#define NETIFAPI_IPADDR_DEF(type, m)  const type * m
+#endif /* LWIP_MPU_COMPATIBLE */
+
+typedef void (*netifapi_void_fn)(struct netif *netif);
+typedef err_t (*netifapi_errt_fn)(struct netif *netif);
+
+struct netifapi_msg {
+  struct tcpip_api_call_data call;
+  struct netif *netif;
+  union {
+    struct {
+#if LWIP_IPV4
+      NETIFAPI_IPADDR_DEF(ip4_addr_t, ipaddr);
+      NETIFAPI_IPADDR_DEF(ip4_addr_t, netmask);
+      NETIFAPI_IPADDR_DEF(ip4_addr_t, gw);
+#endif /* LWIP_IPV4 */
+      void *state;
+      netif_init_fn init;
+      netif_input_fn input;
+    } add;
+    struct {
+      netifapi_void_fn voidfunc;
+      netifapi_errt_fn errtfunc;
+    } common;
+    struct {
+#if LWIP_MPU_COMPATIBLE
+      char name[NETIF_NAMESIZE];
+#else /* LWIP_MPU_COMPATIBLE */
+      char *name;
+#endif /* LWIP_MPU_COMPATIBLE */
+      u8_t index;
+    } ifs;
+  } msg;
+};
+
+#endif /* LWIP_NETIF_API */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_API_MSG_H */

src/lwip/include/lwip/priv/mem_priv.h

@@ -0,0 +1,84 @@
+/**
+ * @file
+ * lwIP internal memory implementations (do not use in application code)
+ */
+
+/*
+ * Copyright (c) 2018 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+
+#ifndef LWIP_HDR_MEM_PRIV_H
+#define LWIP_HDR_MEM_PRIV_H
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lwip/mem.h"
+
+#if MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK
+/* if MEM_OVERFLOW_CHECK or MEMP_OVERFLOW_CHECK is turned on, we reserve some
+ * bytes at the beginning and at the end of each element, initialize them as
+ * 0xcd and check them later.
+ * If MEM(P)_OVERFLOW_CHECK is >= 2, on every call to mem(p)_malloc or mem(p)_free,
+ * every single element in each pool/heap is checked!
+ * This is VERY SLOW but also very helpful.
+ * MEM_SANITY_REGION_BEFORE and MEM_SANITY_REGION_AFTER can be overridden in
+ * lwipopts.h to change the amount reserved for checking. */
+#ifndef MEM_SANITY_REGION_BEFORE
+#define MEM_SANITY_REGION_BEFORE  16
+#endif /* MEM_SANITY_REGION_BEFORE*/
+#if MEM_SANITY_REGION_BEFORE > 0
+#define MEM_SANITY_REGION_BEFORE_ALIGNED    LWIP_MEM_ALIGN_SIZE(MEM_SANITY_REGION_BEFORE)
+#else
+#define MEM_SANITY_REGION_BEFORE_ALIGNED    0
+#endif /* MEM_SANITY_REGION_BEFORE*/
+#ifndef MEM_SANITY_REGION_AFTER
+#define MEM_SANITY_REGION_AFTER   16
+#endif /* MEM_SANITY_REGION_AFTER*/
+#if MEM_SANITY_REGION_AFTER > 0
+#define MEM_SANITY_REGION_AFTER_ALIGNED     LWIP_MEM_ALIGN_SIZE(MEM_SANITY_REGION_AFTER)
+#else
+#define MEM_SANITY_REGION_AFTER_ALIGNED     0
+#endif /* MEM_SANITY_REGION_AFTER*/
+
+void mem_overflow_init_raw(void *p, size_t size);
+void mem_overflow_check_raw(void *p, size_t size, const char *descr1, const char *descr2);
+
+#endif /* MEM_OVERFLOW_CHECK || MEMP_OVERFLOW_CHECK */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_MEMP_PRIV_H */