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Author SHA1 Message Date
Evgeny 06b94d37e8 add audit findings document (51 issues across 12 modules) 2026-05-14 03:25:57 +03:00
Evgeny 1a4b0a9de6 fix stale pointer after realloc in uasync socket/event handlers 2026-05-14 01:24:06 +03:00
Evgeny f18037ece2 add 16-bit seq to TCP proxy DATA for loss/duplicate detection 2026-05-13 13:28:05 +03:00
Evgeny b829ff7001 fix use-after-free in tests: swap queue_entry_free/queue_dgram_free order, fix dangling timer handles and stack args; add ETCP MTU bounds, assembly overflow check, etcp_update_mtu 2026-05-13 12:38:20 +03:00
Evgeny 60cebb2535 fix TCP data stall: feed transport_to_uip on ETCP recv, tcp_poll interval 0→2 for close detection 2026-05-13 10:31:38 +03:00
Evgeny 3258a64df4 add periodic cleanup timers for ICMP pending requests and UDP flows 2026-05-13 09:02:24 +03:00
Evgeny cec736a4b0 redesign TCP close: closing_tun/closing_rem flags, poll-driven cleanup, proper half-close 2026-05-13 03:18:29 +03:00
Evgeny 238fb0eb23 fix remote_proxy: cleanup socket on EOF/error/connect-fail to prevent infinite callback loop 2026-05-13 02:32:26 +03:00
Evgeny f1bd65f450 fix lwIP TCP checksums on LE: remove htons from pseudo-header sum, add htons to return values 2026-05-13 02:11:59 +03:00
Evgeny f85f2f20fb fix tcp_pseudo_checksum: add ntohs() to correctly extract 16-bit IP halfwords from NBO on LE 2026-05-13 01:55:14 +03:00
Evgeny b1e50c2838 fix tcp_proxy_ensure_outbound_listen: pass network byte order port to tcp_bind 2026-05-13 01:37:59 +03:00
Evgeny 76e916f94d add transparent outbound TCP proxying: dynamic listen on unknown ports, fwd to exit 2026-05-13 00:47:40 +03:00
Evgeny 01cf7f67b6 fix TCP close: properly close lwIP pcb on both sides, fix use-after-free, add poll close path 2026-05-13 00:16:35 +03:00
Evgeny c396b91fde fix missing IP checksum in icmp/udp deliver_reply, fix udp output_queue->input_queue 2026-05-12 23:38:35 +03:00
Evgeny 889f6d5c3a fix icmp_proxy: write reply to input_queue (not output_queue) to reach TUN device 2026-05-12 23:19:56 +03:00
Evgeny 13d469d866 add orig_src_ip to ICMP proxy protocol, fix deliver_reply dst_ip (was wrong tun_ip_addr) 2026-05-12 23:03:49 +03:00
Evgeny 67d57c9751 add etcp_router INFO logs for ICMP_PROXY reply path (send+deliver) 2026-05-12 22:45:57 +03:00
Evgeny 02c7153822 add icmp_proxy diagnostic logging on all reply path stages 2026-05-12 22:30:16 +03:00
Evgeny 07540b7ff8 fix icmp: use SOCK_RAW for FreeBSD compat, add socket diagnostic logging 2026-05-12 22:08:30 +03:00
Evgeny d00996243d fix lwip_tcp_priv.h: use #ifndef _WIN32 for arpa/inet.h (FreeBSD compat) 2026-05-12 22:00:41 +03:00
Evgeny edeb83ce89 replace fake ICMP echo reply with test_loopback flag, honest error when no raw socket 2026-05-12 21:46:16 +03:00
Evgeny d3b6057f82 add framed read for raw fd (2-byte len prefix), TCP_NODELAY, fix test half-close ordering 2026-05-12 19:43:44 +03:00
Evgeny d0af315ff6 fix uasync set_timeout(0) ordering, dummynet shaper initial delay, add tests 
- uasync_set_timeout(0): use FIFO immediate_queue instead of timeout_heap
  to guarantee execution AFTER all currently-expired heap timers
- uasync_cancel_timeout: search immediate_queue for timeout=0 timers
- dummynet: start initial shaper with bandwidth-based delay instead of 0
  (prevents queue from never filling up when packets arrive sequentially)
- test_dummynet: rename get_time_us -> now_us (conflict with u_async.h)
- test_u_async_comprehensive: fix immediate_timeouts, add timeout_ordering test
 2026-05-12 13:42:16 +03:00
Evgeny ad8bc0ae00 fix lwip_tcp port byte order (double-htons), mapping lookup, socket error handling 
- Fix port encoding: PCB stores ports in host byte order, tcp_create_segment uses htons
- Fix tcp_bind/tcp_connect: ntohs incoming network-order ports
- Fix demux comparisons: use host-order sport/dport statics instead of in-place ntohs
- Fix tcp_output_alloc_header_common: htons for port output
- Add static sport/dport variables (host byte order) to avoid tcphdr corruption
- Fix sock_transport_error_callback: handle EPOLLERR during non-blocking connect
- Fix mapping local_port: store host-order port for find_mapping_by_port
- Fix tcp_proxy_raw_read/tun_input: use IP total length for packet boundaries
- test_tcp_proxy: reduce size to 2KB, fix port, add debug_init, add echo server log
- test_tcp_proxy handshake and basic data flow now working (known: cwnd/poll throughput tuning needed)
 2026-05-12 12:16:09 +03:00
Evgeny c05e1c9991 replace uIP with adapted lwIP TCP stack (lwip_tcp) 
- Replace uIP (src/uip/) with adapted lwIP 2.1.x TCP module
- Remove original src/lwip/ (replaced by src/lwip_tcp/)
- New src/lwip_tcp/ module: lwip_pbuf, lwip_tcp core/in/out
- Full TCP state machine, sliding window, congestion control
- Fast retransmit/recovery, Van Jacobson RTT estimation
- Nagle algorithm (TF_NODELAY), delayed ACK
- OOSEQ reassembly, TIME-WAIT handling
- Memory: memory_pool for PCB, listen PCB, tcp_seg
- Timers: uasync periodic timer drives fast/slow timers
- Output: callback-based IP packet output (TUN/raw-fd)
- Error codes: LERR_ prefix to avoid conflicts
- pbuf: simplified PBUF_RAM with proper header space reservation
- Integrate into tcp_proxy.c/h with per-pcb callbacks
- Active connection API: struct proxy_conn* instead of int conn_idx
- Makefile: remove uip, add lwip_tcp files
- test_tcp_proxy updated for new API; test_tcp_proxy_remote disabled
- Known: test_tcp_proxy data transfer needs flow tuning (WIP)
 2026-05-11 22:51:48 +03:00
Evgeny a6311a17d0 add UDP/ICMP proxy, refactor tcp_proxy via_node to instance-level 
- UDP proxy: datagram relay client↔exit over ETCP
- ICMP proxy: echo ping relay client↔exit over ETCP
- Move via_node_id from per-forward-mapping to global tcp_proxy setting
- Support multiple concurrent tcp_proxy instances (no singleton g_tcp_proxy)
- Cap handshake padding to stay within 1472+overhead
- Handle non-TCP packets (UDP/ICMP) in tcp_proxy raw/tun input paths
- Add utun_instance_create_from_str() for test config creation
 2026-05-11 18:37:36 +03:00
Evgeny 9b59415f83 add tcp_proxy and remote_proxy sections to sample config 2026-05-11 00:57:21 +03:00
Evgeny 17e95cc2a3 fix remaining pointer-sign warnings in sc_set_peer_public_key callers 2026-05-10 19:03:42 +03:00
Evgeny 68f4ae12c8 fix all compiler warnings: array-bool, pointer-sign, tautological, unsequenced 2026-05-10 18:56:06 +03:00
Evgeny a0e5446790 migrate NAT and DATA to etcp_router, fix warnings and destroy order 2026-05-10 14:00:49 +03:00
Evgeny 2611a05d81 revert unnecessary return -1 in void-test ASSERT macros; only test_bgp_route_exchange uses ASSERT in int main() 2026-05-10 00:49:46 +03:00
Evgeny fcb6a59ca9 fix ASSERT macros: return -1 instead of bare return in int main() (FreeBSD -Wreturn-mismatch) 2026-05-10 00:44:59 +03:00
Evgeny 075d97a459 fix .gitignore: stop ignoring test_*.c source files; add missing test_ipv6_sockets, test_tcp_proxy, test_radix, test_route6_lib sources 2026-05-10 00:34:28 +03:00
Evgeny c24a6367cc add IPv6 default route interface auto-detection for permanent/temporary IPv6 without netif 
- get_default_route_netif_index(): UDP connect trick + getifaddrs to find default route iface
- etcp_socket_add(): auto-detect netif_index when not specified in config
- queue_new() API: explicit index_offset/index_size params instead of implicit from hash_size
- radix: cleanup types (uint8_t*), replace bzero/bcmp with memset/memcmp, remove kernel ifdefs
- route6_lib: new IPv6 routing library + get_node_v6_routes()
 2026-05-10 00:05:23 +03:00
Charlie Root e1f051856f radix 2026-05-09 12:19:20 +03:00
Evgeny 2565e8d008 add uIP TCP/IP stack (minimal — only files needed for tcp_proxy build) 2026-04-29 00:20:09 +03:00
Evgeny 9869cf66f1 add etcp_router service routing layer + remote TCP proxy (uip+socket via router) 
etcp_router: routable service packets with dst/src node_id
- etcp_router_bind/unbind: per-instance service handler registry
- etcp_route_send: send to node by id via BGP routing
- multi-hop forwarding through intermediate nodes
- loopback optimization (dst==self dispatches directly)

remote_proxy: exit node creating OS sockets on demand
- handles CONNECT/DATA/CLOSE via etcp_router
- non-blocking socket connect with uasync callbacks
- echo back response data to requesting node

tcp_proxy: etcp_transport for remote proxy
- via_node_id in mapping selects between sock/etcp transport
- unified handler for both tcp_proxy and remote_proxy roles
- config: forward = port -> ip:port via NODE_HEX [remote_proxy] section

tests: test_etcp_router (20 pkts bidirectional), test_remote_proxy (echo)
 2026-04-28 20:01:12 +03:00
Evgeny 5e834b519f mass_update: log all sessions to files, terminal output only for errors 2026-04-28 00:00:40 +03:00
Evgeny 171e70a810 add inflight data return to normalizer on reinit + configurable inflight min/max limits + test 2026-04-27 23:50:52 +03:00
Evgeny dea3a39598 fix: reconnect test — cancel timers in conn_reset, add init_timer cancel on link_state=3, add reinit resilience to test 
- etcp_conn_reset: cancel retrans_timer/ack_resp_timer via uasync_cancel_timeout
  before nulling (was leaking timer handles, confirmed by 'Timer leak: diff')
- etcp_connections: cancel link->init_timer explicitly when link_state becomes 3
  on both client and server INIT_RESPONSE paths (prevents spurious INIT after
  connection is established that could trigger cascading reinits)
- etcp_connections: remove duplicate conn->session_id assignment in new conn path
  (session_id is set later via conn_reinit flow)
- pkt_normalizer: resume output queue callback after pn_reset
- Add test_etcp_reconnect with reinit detection — monitors conn->reinit_count
  and restarts data transfer if reinit occurs during active phase
- Add etcp_dump.c/h — ETCP connection state dump utility for debugging
 2026-04-27 19:46:45 +03:00
Evgeny 0f8df44b2b build: out-of-tree VPATH build, tests run once with colored timing 
- Root Makefile: hand-written bootstrap delegating to build/
- Makefile.am: simplified to SUBDIRS + clean-local
- build.sh: delegates to make, autoreconf only
- tests: removed duplicate TESTS run, added colored [PASS]/[FAIL]/[SKIP] with timing
- .gitignore: added /build/ for out-of-tree artifacts

Result: 0 .o files in source dirs, 29/29 tests pass
 2026-04-27 13:48:22 +03:00
Evgeny d0d4199273 etcp: unified send hook via etcp_udp_send, remove loss_rate, add dummynet_filter inline mode, rewrite BGP test 
- Add etcp_udp_send_fn_t hook typedef, send_hook/send_hook_ctx fields to ETCP_LINK
- Implement etcp_udp_send() wrapper — all UDP sends go through one point
- Remove loss_rate from ETCP_SOCKET, CFG_SERVER, config parser, send path
- Add dummynet_filter: inline send-hook with loss/delay, no proxy socket needed
- Rewrite test_bgp_route_exchange: 3-node chain A(2 links)↔B↔C, 7 phases
  with dummynet_filter-based link failure/recovery simulation
- Clean up tests: remove skeleton test_routing_mesh, 6 debug/stale test files
- Refactor test_etcp_simple_traffic and test_pkt_normalizer_etcp (remove debug spam)
- Fix test_etcp_two_instances: remove private field access, fix false PASS on timeout
 2026-04-27 12:43:52 +03:00
Evgeny e7c32d9ac1 1 2026-04-26 19:58:37 +03:00
Evgeny 7d03749522 1 2026-04-26 19:53:05 +03:00
Evgeny 61fee27478 congestion: burst-based BW measurement + adaptive inflight (slow start/cong avoidance/loss response) 
New features:
- get_time_us() in lib/u_async.c/h for µs-precision timing
- Burst measurement (ETCP_SECTION_MEAS_TS 0x07, MEAS_RESP 0x08, FILLER 0x09)
  - 12 MTU packets sent at line rate, receiver measures inter-packet gaps
  - Burst triggered when link saturated + min 500ms interval
  - Result: measured BW -> bandwidth for shaper, burst_target_bdp for window cap
- 3-phase adaptive inflight in link_stats_timer_cb:
  - Slow start: windows doubles each RTT, exits on loss/RTT spike/threshold
  - Congestion avoidance: additive increase, proportional RTT shrink, multiplicative loss shrink
  - Burst target cap: inflight_lim <= burst_target_bdp * 1.1
- Dynamic optimal_inflight = sum(link->inflight_lim_bytes), recalculated on change
- Adaptive win_timebase = rtt/2 (was hardcoded 10ms)

Fixes:
- dummynet.c: shaper formula fixed (80000 -> 80)
- dummynet.c: queue_data_put call fixed (3 args -> 2)
- etcp.c: SIZE ERROR format string (missing log_name argument)
- etcp_request_pkt: FILLER leaves room for PAYLOAD overhead

Tests:
- test_etcp_congestion.c: single-threaded, 5-phase BW/delay/loss test
  - sender + receiver + dummynet in one uasync
  - CSV metrics output every 100ms
- All 29 existing tests pass
 2026-04-26 00:17:32 +03:00
Evgeny edfe665837 log: move individual ping logs from INFO/TRACE to DEBUG level 2026-04-25 21:59:34 +03:00
Evgeny 6c057ca89a fix BGP: delay up_cbk until connection initialized, fix send_table_request leak 2026-04-25 21:46:35 +03:00
Evgeny a356eedc0d cleanup BGP/connection logging 
- Consolidate on_up/on_down to single INFO line with peer_id
- Remove DEBUG_CATEGORY_DEBUG duplications from route_bgp.c
- NODEINFO: inline lightweight dump (no malloc), verbose log -> DEBUG
- NAT_INFO: remove hex dump duplications, single clean INFO line
- Send NODEINFO per-recipient: INFO->DEBUG_DEBUG
- Per-ping callbacks: INFO->DEBUG_TRACE
- Per-packet traffic direction: INFO->DEBUG_TRACE
- route_insert/delete: use node_id instead of pointer
- Add cancel_all log, add_to_senders conn name
- send_full_table: ERROR->WARN for consistency checks
- is_local_subnet: DEBUG->TRACE
- Fix etcp_send_ping BGP category
 2026-04-25 20:06:48 +03:00
Evgeny 227a1aafad cleanup debug logging 2026-04-25 19:43:51 +03:00
Evgeny 048d1c18b1 fix: restore lost if(changed) block in update_my_nodeinfo + add debug warnings 2026-04-25 19:41:17 +03:00