- keepalive_adaptive=0 disables adaptive keepalive period growth,
keeping it fixed at 200ms for faster timeout detection in tests
- test_bgp_triangle: 5-node triangle topology test (6 phases):
validates alternative path recording (fix#1), cascading node
removal on full isolation, and full recovery
- config generation via utun_instance_create_from_str() with
pre-generated keys — no temp files needed
- Add ed25519_public_key[32] to NODEINFO struct for pubkey distribution
- Add ed25519_public_key[32] to ROUTE_BGP (derived from X25519 privkey at init)
- Add ROUTER_FLAG_SIGNED (0x08) to SVC_ROUTE_HDR flags byte
- router_send_one_flags: when is_signed, sign [hdr][payload] and append 64-byte sig
- etcp_router_recv_cb: verify Ed25519 signature when ROUTER_FLAG_SIGNED set
- New API: etcp_router_conn_send_signed()
- Drop signed packets if sender node not in routing table or no Ed25519 key
- 5 unit tests in test_etcp_router_unit.c covering OK/tampered/unknown/no-key/short
lib/u_async: uasync_set_socket_read/write — O(1) EPOLL_CTL_MOD toggle per socket
lib/ll_queue: queue_set_empty_callback — one-shot deferred callback on queue drain
lib/tcp_io: TCP connection management via uasync + ll_queue with pool alloc
- read: direct recv into pool buffer, high/low water flow control
- write: autofetch via ll_queue callback, partial send via write_buf
- on_fin/on_error/on_flushed callbacks, FIN deferred until read_queue drained
- getpeername for pre-connected socket detection
tcp_proxy_server: migrated to tcp_io (22→13 fields, 437→270 lines, -7 functions)
tests: test_tcp_io (5 tests), test_tcp_proxy_server rewritten for tcp_conn
- New SVC_ROUTE_HDR (packed struct, 22 bytes): cmd+dst+src+seq+svc_id
- ETCP_ROUTER_CONN: state per (remote_node_id, svc_id), hash-indexed in router_conns
- Reorder via recv_q (hash by seq), dedup with 32-bit circular compare
- Periodic ACK (100ms), idle ACK (500ms), inflight limit via tx_seq - rx_acked
- Legacy mode: no conn → direct delivery without reorder
- etcp_router_conn_get/send/close API for seq-managed connections
- Unit test test_etcp_router_unit: 18 tests, 3ms, no ETCP/sockets/BGP
- 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
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)
- 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
- Rename NAT types: OPEN->EIM, RESTRICTED->STRICT across all code
- Add flat addr list {type,ip,port,socket_id} to NODEINFO (NODEINFO_IPV4_ADDR)
- Add NODEINFO_IPV4_SOCKET_META for per-socket metadata
- Add NODE_CONNECTIVITY with per-type probe status and min_rtt
- New module: route_connectivity.c/h (probing engine with socket fallback)
- STRICT verified addresses excluded from NODEINFO broadcast
- Trigger probing on new/updated BGP node, cancel on remove/withdraw
- Update NAT type names in etcpmon GUI
- route_ping.c: burst mode - send next ping immediately on response
- route_ping.h: add target_ipv4/target_port/pubkey to BGP_PING_REQUEST
- test_nat_detection.c: add test for ping without embedded pubkey
- test_etcp_simple_traffic.c: use dynamic ports + fix timebase units
- Makefile.am: show test execution time in ms
- build.sh: added --full flag for full rebuild (autoreconf + configure + make)
- build_direct.sh: incremental compilation (skips unchanged files)
- build_full.bat: new Windows batch for full rebuild
- configure.ac: fixed Windows detection using AC_COMPILE_IFELSE
- lib/u_async.c/h: Windows wakeup socket support, uasync_post for thread-safe callbacks
- src/tun_if.c/h: cross-platform TUN refactoring, Windows read thread support
- src/tun_windows.c: Windows TUN implementation improvements
- src/control_server.c: removed premature return statement
- src/routing.c: include ordering fix
- src/utun.c: windows compat includes
- Deleted obsolete net_emulator/Makefile and tinycrypt/Makefile
- Implement control_server.c/h for monitoring and management
- Add Windows-compatible uasync_poll using select() instead of WSAPoll
- Fix Wintun adapter creation to open existing adapters first
- Add debug category for control server operations
- Update build files to include control server in compilation
- Add test_control_server to test suite
Evgeny
jeka