Both req (INIT_REQUEST) and resp (INIT_RESPONSE) point to pkt->data.
resp->peer_port at offset 23-24 overwrites req->src_ipv4[0..1] at same offset.
Save src_ipv4/src_port before building the response.
- Extract ETCP_INIT_REQUEST_PKT / ETCP_INIT_RESPONSE_PKT named structs
- Replace anonymous structs and manual offset parsing with typed struct access
- Add src_ipv4/src_port fields (V2) to INIT REQUEST for DIRECT detection
- Server compares reported client addr with observed src; match + public IP → NAT_TYPE_DIRECT
- Skip STUN NAT check for DIRECT links
- route_bgp: handle NAT_TYPE_DIRECT → NAT_VERIFIED_DIRECT in handle_nat_info
last_recv_local_time was not set in the server INIT processing path,
causing the keepalive timer to see a stale timestamp and trigger a
false link-down → route_bgp_remove_conn() right after reconnect.
Routes could be deleted before the first normal packet from the
client updated the timestamp via process_decrypted.
- Add acked_bytes/acked_packets to struct ETCP_LINK (init, reset, increment per ACK)
- Add DEBUG_CATEGORY_BBR (23) for BBR-specific debug output
- Add BBR input/output DEBUG_DEBUG around bbr_main call in etcp_ack_recv
- Add "bbr" category name to debug_config and etcpmon GUI
- etcp_link_update_inflight_lim: self-contained method with clamping,
send_blocked_inflight check, loadbalancer_link_ready on cwnd increase
- etcp_conn_on_inflight_lim_changed: recalc optimal_inflight + resume input
- etcp_ack_recv: use etcp_link_update_inflight_lim instead of manual set
- etcp_request_pkt: fix line 928 check old link (inf_pkt->last_link) not new
- etcp_link_close: recalc optimal_inflight on link removal (both branches)
- etcp_socket_remove: fix dangling pointer loop (nullify after close)
- uasync_print_resources: show timer names, remain time, deleted entries
- diagnostics in utun_instance_destroy and test_etcp_reconnect
memory_pool: memory_pool_is_freed(pool,obj) — поиск obj в free-списке
tw_pcbs (3 места): !ctx→halt и is_freed→halt в начале итерации
— ловит висячий PCB до re-alloc и после re-alloc
etcp: is_freed→halt перед etcp_conn_input (caller + callee)
— ловит pkt освобождённый до входа
tcp_alloc: убран старый скан tw_pcbs (заменён на is_freed)
все dangling проверки — halt (while(1)) вместо break/return
Shows mtu, s_rand, s_max, offset/xoffset, and whether capped.
RESP: removed old hardcoded 1472+26 cap, replaced by formula.
Both paths use consistent formula based on #defines.
Hardcoded 1472-46 cap exceeded link MTU=1460, causing 'packet too long'
error on INIT handshake. Use link->mtu - UDP_HDR_SIZE - offset - 19
instead of fixed 1472.
- link_status теперь требует двусторонней слышимости: remote && local
- recv_keepalive восстанавливается ДО вычисления link_status (избегает заклинивания)
- loadbalancer_link_ready по переходу 0→1 с проверкой was_up
- 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_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
- etcp_connections.c:1142: remove & before addr in sockaddr_storage_to_str call
- test_etcp_simple_traffic.c: add #include <process.h> and #define getpid _getpid for Windows
The allowed_keys authorization was incorrectly checking all INIT-decrypted
packets including PING/PONG. Moved the check after packet type validation
so it only applies to ETCP_INIT_REQUEST/NOINIT (incoming connection requests).
Fixes test_etcp_ping and test_nat_detection failures.
- Add lib/getmyip.c/h with get_outgoing_local_ip() using UDP connect+getsockname
- Update etcp_socket_add() to use new function for 0.0.0.0 and :: bindings
- Support both IPv4 (8.8.8.8) and IPv6 (2001:4860:4860::8888) auto-detection
- Remove broken get_default_route_ip() from platform_compat (it returned gateway IP, not local IP)
- Keep get_interface_ip_by_index() for explicit interface bindings
- Update Makefile.am to include new getmyip module
- New lib/getmyip.c/h with get_outgoing_ip(), get_default_local_ip(), get_local_ip_by_index()
- Uses UDP connect + getsockname instead of /proc/net/route parsing
- Supports both IPv4 and IPv6
- Updated etcp_socket_add() to use new functions for interface_addr detection
- Added CFG_ALLOWED_KEY struct with binary key storage (64 bytes) for fast memcmp comparison
- Implemented parsing of [allowed_keys] section with allow_all flag and per-key entries
- Added key validation in etcp_connections.c server handler (errorcode=8 for rejected keys)
- Default behavior: deny all if [allowed_keys] section is missing or allow_all=0 with no keys
- Added proper memory cleanup and debug logging for allowed_keys configuration
- Updated all test configs to include [allowed_keys] allow_all=1 for backward compatibility
Evgeny
jeka