38c9f229bc
stcp: ed25519 pubkey exchange in handshake, fix instance destroy segfault, fix chat_tcp_test
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- u_async.c: process immediate_queue BEFORE epoll_wait in uasync_poll
- stcp_link.c: defensive NULL etcp_conn/etcp_link in stcp_link_close
- utun_instance.c: move stcp_server_list_destroy_all to Phase J (before ETCP),
add deferred drain in both Phase J and L
- stcp.h/c: STCP_HS_ENC_CLIENT 6→38, STCP_HS_ENC_SERVER 7→39,
exchange ed25519_pubkey in both handshake directions
- etcp_connections.c: copy peer_ed25519 from STCP to ETCP_CONN in
etcp_link_enter_ready_tcp; guard link->etcp in tcp_link_close_cb
- chat_sync.c: fix lk->conn NULL dereference for TCP links
- test_stcp.c: update stcp_server_create/stcp_client_connect callsites
- tools/chat_tcp_test: change transport udp→tcp
3 months ago
d773f1724a
refactor: STCP connections as ETCP links (is_tcp)
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- Add is_tcp, tcp_link, tcp_reconnect_* fields to ETCP_LINK
- Remove transport_link from ETCP_CONN, add tcp_link_count
- stcp_link: replace embedded etcp_conn with pointer; add etcp_link backpointer
- stcp_link: link_rx_cb routes ETCP data to etcp_conn_input
- stcp_link: call on_close_cb in close
- New TCP functions: etcp_link_enter_ready_tcp, etcp_tcp_link_start_connect,
etcp_tcp_link_start_reconnect, tcp_link_close_cb, etcp_tcp_send
- etcp_link_new: handle NULL conn for TCP links; skip enter_init for TCP
- etcp_link_close: close stcp_link for TCP
- etcp_encrypt_send: redirect TCP to etcp_tcp_send (skips AES-CCM)
- tcp_server_on_link: create ETCP_LINK(is_tcp=1) + enter_ready_tcp
- etcp_connect: TCP addrs -> etcp_tcp_link_start_connect
- Remove ctx->tcp_link/tcp_ready
- test_stcp_traffic: find stcp_link via links->is_tcp instead of transport_link
- 66/68 tests pass; 2 STCP tests expected to fail (integration not complete)
3 months ago
fcf3fb7f51
refactor: move transport (etcp/stcp/normalizer) to transport_layer/, routing (bgp/pings/topo*) to routing_layer/
3 months ago
a7ecee01f5
etcp: replace connections linked-list with indexed ll_queue, add state/ref_count lifecycle
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- Remove ETCP_CONN.next linked-list, UTUN_INSTANCE.connections list/count
- Unified connections in single ll_queue indexed by peer_node_id (0=pending)
- struct conn_queue_entry { peer_node_id, conn* } for uniform queue data
- Connection lifecycle via etcp.c: create→pending, conn_ready→indexed, close→detach+deferred free
- Close split: phase1 detach from external world, phase2 deferred via uasync_call_soon
- etcp_conn_set_peer_node_id: reindex on ID change (WARN)
- etcp_conn_ref_take/free: blocking close until refcount returns to 0
- Remove chat_connections — use unified connections queue directly
- Update all iteration/search patterns across 40 files (src + tests + chatgui)
3 months ago
8756f561be
build: extract libutun.a from src/ + add db_sync module + etcp API, BBR improvements
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- Add libutun.a (noinst) containing all src/*.c except utun.c
- utun binary now links libutun.a + libuasync.a
- tests/Makefile.am simplified: all tests link libutun.a instead of
manual .o file lists (removed ~70 lines of boilerplate)
- Add db_sync module: distributed content-addressed DB with LMDB
backend, peer-to-peer sync via etcp_router (svc 0x20)
- etcp API: etcp_send_in_order(), etcp_clear_inflight_queues(),
verify_packet_signature(), BBR getters
- BBR: adaptive threshold (1/4 of pipe-min instead of hardcoded)
- route_bgp/etcp_connect: STCP transport support in NODEINFO
- conn_mgr: NODEINFO_ADDRS doc for nat_type/transport/proto fields
- Cleanup: removed AUDIT_FINDINGS.txt, filelist.txt, nat.txt
4 months ago
7139969acd
fix: Windows/MSYS2 build compatibility
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- proxy/icmp_proxy.c: define struct icmp/ip + ICMP constants for _WIN32
- lwip_tcp_priv.h: use #include <winsock2.h> instead of #define htonl/htons
- lwip_tcp.h/c: rename poll field to pollfn (avoid WSAPoll macro conflict)
- tests: guard Unix-only headers with #ifndef _WIN32, skip fork/socketpair tests
4 months ago
0b5a710fe6
etcp_connect + BGP_READY callbacks + router reconnect test
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- etcp_connect.c: async connect API with EARLY/LATE/BGP_READY callbacks
- etcp_connect.h: declaration (via etcp_api.h)
- connect_deliver: fix to preserve unfired callback nodes
- etcp_set_routing_exchange_state: fires bgp_ready_cbk on TABLE_COMPLETE
- route_bgp: TABLE_COMPLETE handler + route_bgp_send_table_complete
- etcp.c: connections_count tracking, cleanup on close
- test_etcp_router_reconnect: a-b-c topology with b restart (etcp_connect)
- test_etcp_connect: unit tests for async connect API
- etcp_router: inflight/retrans/close improvements
- Various proxy/NAT/router cleanups
4 months ago
73f707ef9b
crypto: migrate ECDH(secp256r1) to X25519, drop TinyCrypt
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- SC_PUBKEY_SIZE: 64 -> 32 bytes, SC_PUBKEY_ENC_SIZE: 72 -> 40
- sc_set_peer_public_key uses EVP_PKEY_derive with X25519
- sc_generate_keypair via EVP_PKEY_keygen(EVP_PKEY_X25519)
- sc_compute_public_key_from_private via EVP_PKEY_new_raw_private_key
- sc_validate_key: check non-zero (X25519 has no invalid keys)
- sc_obfuscate_pubkey: XOR now 32 bytes
- Remove all TinyCrypt code (~860 lines), always use OpenSSL
- Remove TinyCrypt from build system, drop test_crypto/test_ecc_encrypt
- Update all test keys (128 hex -> 64 hex)
- Fix bbr_integration.c split-line pubkeys
4 months ago
075c4f4583
memory_pool: name field — идентификация пула в диагностике коррапшна
5 months ago
61fee27478
congestion: burst-based BW measurement + adaptive inflight (slow start/cong avoidance/loss response)
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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
6 months ago
evgeny
Evgeny