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84246bea892ed8e06fda967f7978e1e4d348d416
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5 Commits
Author SHA1 Message Date
evgeny a49cf5434e Add randomized ETCP padding and isolate STCP CTR streams per connection 2026-10-07 10:45:42 +02:00
evgeny 38c9f229bc stcp: ed25519 pubkey exchange in handshake, fix instance destroy segfault, fix chat_tcp_test 
- 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
 2026-08-07 00:48:27 +03:00
evgeny d773f1724a refactor: STCP connections as ETCP links (is_tcp) 
- 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)
 2026-08-06 22:14:32 +03:00
Evgeny fcf3fb7f51 refactor: move transport (etcp/stcp/normalizer) to transport_layer/, routing (bgp/pings/topo*) to routing_layer/ 2026-07-21 20:25:41 +03:00
Evgeny f913bdf351 stcp: streaming TCP module + stream cipher + comprehensive tests 
- secure_channel: add sc_stream_state + sc_stream_init/sc_stream_xor/sc_stream_cleanup
  AES-128-CTR streaming cipher for incremental encrypt/decrypt
- stcp.h/c: shared stcp_conn lifecycle, set_on_close, rx/tx queue setup
- stcp_server: listen/accept, handshake (obfuscated pubkey + ECDH + stream), DATA phase
- stcp_client: connect, handshake, DATA phase
- Protocol: key_block(72) + enc(data+crc) + padding for handshake
           size(2 LE) + enc(data+crc) for data messages
- Tests: test_stream_cipher (AES-CTR correctness)
         test_stcp (6 cases: sizes 0..65535, 200 msgs, wrong key,
                    close detection, multi-client, interleaved send/recv)
- Fix: 0-length message handling in tx_queue callbacks
 2026-06-14 10:00:02 +03:00