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303 Commits
Author SHA1 Message Date
Evgeny 63f019530b feat: tcp_io library + uasync socket toggle + ll_queue empty_callback 
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
 2026-06-03 16:24:46 +03:00
Evgeny ac3fe79db8 etcp_router: consumer-driven ACK with interval throttle (10ms) 
- consumer_ack flag: ACK sent only on consumption, not assembly
- etcp_router_consumer_ack() — called from tcp_proxy_client feed_from_transport
- last_ack_sent_tb: interval-based throttle — send immediately if >=10ms passed,
  otherwise timer for remaining time
- timer rules: NULL handle after cancel/fire, NULL check before start
- ROUTER_ACK_INTERVAL_TB 1000→100 (100ms→10ms)
- test_etcp_router_unit: updated test 14 for new immediate-send behavior
 2026-06-03 11:50:50 +03:00
Evgeny 2a259191b9 feat: queue_set_waiter_defer — immediate or call_soon callback mode 
queue_waiter_handle stores defer_q/cb/arg, no extra malloc.
queue_set_waiter_defer(q, 1) enables call_soon dispatch for waiter callbacks.
bbr_integration uses it instead of manual send_waiter_cb wrapper.
 2026-06-03 02:18:46 +03:00
Evgeny 331d43c6f7 fix: proxy ERROR loop, BBR test backpressure, O(1) u_free, test ordering 
- tcp_proxy: ERROR silently dropped (no ERROR->ERROR loop), Russian removed from logs
- etcp_bbr: swap min(lo) and max(4*mss) in bbr_bound_cwnd_for_inflight_model
- test_etcp_bbr: fix cwnd comparison (packets vs bytes)
- ll_queue: double-put detection (abort), Floyd cycle detection in consistency check
- ll_queue: QUEUE_DEBUG commented out (was always-on, O(N) per put)
- mem: u_free_impl now O(1) via doubly-linked list, double-free detection
- bbr_integration: queue_waiter_wait + call_soon backpressure (threshold=1)
- tests/Makefile.am: fast tests first, *.log cleanup before run
 2026-06-03 02:06:09 +03:00
Evgeny fceec1aea6 fix: move debug logs before async operations (queue_put, timer_set, resume) for meaningful log ordering 2026-06-02 21:53:51 +03:00
Evgeny 4556f327c2 1 2026-06-02 21:05:06 +03:00
Evgeny 1f4fe37fe5 proxy: rename + simplify + backpressure 
- tcp_proxy/remote_proxy → tcp_proxy_client/tcp_proxy_server
- Все proxy файлы перенесены в src/proxy/
- Конфиг: [tcp_proxy]→[tcp_proxy_client], [remote_proxy]→[tcp_proxy_server]
- Убран subcmd CONNECTED (0x02) — клиент шлёт DATA сразу после CONNECT
- Backpressure: etcp_router_waiter_register/cancel через ll_queue threshold waiter
- Клиент: recv_cb send fail → tx_buf+waiter, не tcp_recved() (окно lwIP=0)
- Сервер: read_cb send fail → pause_buf+waiter, пауза read_id
- CLOSE/ERROR отправляется только после drain всех очередей
- Fail: conn не найден/closed → send ERROR вместо CLOSE/silent drop
- PROTOCOL.md: полная архитектура с диаграммами состояний и потоков
 2026-06-02 18:02:37 +03:00
Evgeny ed6b4d1046 debug: выделить link keepalive в отдельную категорию KEEPALIVE (21), добавить DEBUG_DEBUG при приёме keepalive-пакета 2026-06-01 10:03:14 +03:00
Evgeny 4e6d57e371 clear freed memory in u_free_impl to catch UAF earlier 2026-05-30 20:03:33 +03:00
Evgeny 6521451493 disable BACKTRACE_ENABLED to fix lld linker error with backtrace symbols 2026-05-30 02:17:46 +03:00
Evgeny 7c71ef683c add lwIP TCP stack test with fixes: rcv_wnd tracking, FIN compensation, tmr_phase dual-counter, trace ring buffer, stats counters 2026-05-30 01:39:34 +03:00
Evgeny 8994d7a834 update timeout_heap and u_async: O(1) cancel, heap cancel bubble-up fix, epoll callback safety, uasync_stop, socket_array u_realloc 2026-05-29 01:11:37 +03:00
Evgeny 4d5afe5ae9 fix uasync: posted_tasks delivery on Linux, create cleanup leaks, atomic array expand 2026-05-14 03:32:23 +03:00
Evgeny 1a4b0a9de6 fix stale pointer after realloc in uasync socket/event handlers 2026-05-14 01:24:06 +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 a0e5446790 migrate NAT and DATA to etcp_router, fix warnings and destroy order 2026-05-10 14:00:49 +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 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 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 39544e6b2b Fix: Add bounds/mtu checks, underflow protection and null deref fix for ETCP robustness 2026-04-25 12:38:05 +03:00
Evgeny 595d2b177b Refactor: Replace custom tc_hton*/tc_ntoh* with standard htobe16/be16toh/htobe32/be32toh, move htobe16/be16toh to platform_compat.h 2026-04-25 01:16:09 +03:00
Evgeny 69b49d424b Fix: Include platform_compat.h before winsock2.h in debug_config.h so tc_htonl/tc_htons macros are defined first 2026-04-25 01:02:50 +03:00
Evgeny 6284a95267 Fix: Define tc_htonl/tc_htons as macros before winsock2.h to avoid struct-in_addr redefinition 2026-04-25 00:59:50 +03:00
Evgeny aafa0cfcab Fix: Add portable tc_htonl/tc_htons/tc_ntohl/tc_ntohs macros, replace winsock2-incompatible hton*/nto* in NAT test files 2026-04-25 00:52:33 +03:00
Evgeny 907ef244c6 NAT: Full Cone (EIM) NAT with ETCP_ID_NAT protocol, per-node routing, and comprehensive test suite 
- New ETCP protocol ETCP_ID_NAT (0x02) for NAT traffic between nodes
- eim_nat.c/h: Pure NAT engine (table, port allocation, checksum updates, egress/ingress)
- nat_transport.c/h: Transport layer (NAT TUN, ETCP binding, client/provider roles)
- route_bgp_find_conn_for_node(): shared utility for optimal connection lookup
- tun_init_nat(): dedicated TUN creation for NAT
- Config: [nat] section with tun_ip, port_start/end, nat_via, forward rules
- Fix: csum_update_ip/transport use htonl() halves (correct on LE systems)
- Fix: IP_FRAG_MF_MASK changed to 0x2000 (after ntohs, MF is bit 13)
- Tests: 26 engine unit + 4 transport integration + 7 stress (29 total)
 2026-04-25 00:43:25 +03:00
Evgeny 45a181370f Add htobe32/be32toh macros for Windows build 2026-04-24 14:44:24 +03:00
Evgeny 27df3355f1 Fix getmyip.h Windows build: use winsock2.h instead of sys/socket.h 2026-04-24 14:39:12 +03:00
Evgeny 6aedf5fe91 Replace buggy get_default_route_ip() with get_outgoing_local_ip() for reliable local IP detection 
- 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
 2026-04-24 14:07:41 +03:00
Evgeny 724a9ff5c7 Add getmyip module for reliable local IP detection 
- 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
 2026-04-24 13:58:24 +03:00
Evgeny b466d14fe4 Добавлено поле interface_addr в ETCP_SOCKET и interface_ip/port в BGP_NAT_CHECK_REQ 
- platform_compat: get_interface_ip_by_index() для получения IP по ifindex
- ETCP_SOCKET: interface_addr заполняется из конфига/interface/default route
- BGP_NAT_CHECK_REQ: добавлены interface_ip/interface_port (network byte order)
- route_bgp_send_nat_check_req: отправляет interface_addr линка
- route_bgp_handle_nat_check_req: принимает interface данные в sockaddr-заглушку
 2026-04-22 18:16:49 +03:00
Evgeny cbde38d52a Remove accidentally committed binaries and temp files 2026-04-22 11:45:54 +03:00
Evgeny 77fd7c19de WIP: debug byte order diagnostics 2026-04-22 02:14:47 +03:00
Evgeny d74ab1c1c6 Add name parameter to uasync_set_timeout for timer identification in dumps 2026-04-21 19:06:45 +03:00
Evgeny 3c0b5f501a Fix: use allocated_count from mem.c for busy memory calculation 
busy = u_get_allocated_count() - memory_pool_get_total_free_blocks()
 2026-04-21 17:41:45 +03:00
Evgeny cee9a04348 GUI: add active timeouts and busy memory blocks counters 
- Add timeout_heap_get_size() to get active timer count
- Add global counters in memory_pool: g_total_free and g_total_allocated
- Simplify busy memory calculation to single formula:
  busy = memory_pool_get_total_allocated() - memory_pool_get_total_free_blocks()
- Add new IDC_EDIT_ACTIVE_TIMEOUTS and IDC_EDIT_BUSY_MEMORY to GUI
 2026-04-21 17:22:58 +03:00
Charlie Root e596564abd 1 2026-04-21 17:13:11 +03:00
Evgeny cfd1e53ee9 mem: add allocations and frees counters with u_mem_get_counters() 2026-04-21 15:35:46 +03:00
Charlie Root 4e2b1c0c01 1 2026-04-21 15:33:46 +03:00
jeka c57f94f38d 1 2026-04-21 15:18:09 +03:00
Charlie Root 09248bdbb6 1 2026-04-21 02:29:31 +03:00
Evgeny 41952703d9 Memory: use DEBUG for hex_dump output instead of printf 2026-04-21 02:27:33 +03:00
Evgeny f195d1d91e Memory: refactor hex_dump to use buffer with DEBUG output 2026-04-21 02:26:27 +03:00
Evgeny 7b305e820f 1 2026-04-21 02:20:53 +03:00
Evgeny 912eb8480c Memory: add hex dump for unfreed blocks in u_report_unfreed_blocks 2026-04-21 01:54:20 +03:00
Evgeny 2558942da1 Memory: add location tracking to pool alloc/free with debug logging 2026-04-20 22:48:27 +03:00
jeka d975696543 1 2026-04-15 15:29:26 +03:00
Evgeny 8bad15b7bb 1 2026-04-15 15:15:15 +03:00
Evgeny 122e619649 1 2026-04-15 10:13:38 +03:00
jeka c1d2d26cae 1 2026-04-15 09:00:12 +03:00