KarpelesLab / slirp / 23952021400

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push

github

Committed by MagicalTux

Commit Message

RFC 9293 compliance: 8 fixes + keepalive idle 300s

1. FIN in SYN-RECEIVED: handleSynReceived now delegates to
   handleDataState after transitioning to ESTABLISHED, ensuring
   FIN flags in handshake-completing segments are processed.

2. TIME-WAIT 2MSL restart: store timer in timeWaitTimer field,
   restart it on each segment received in TIME-WAIT state per
   RFC 9293 §3.10.7.4.

3. CLOSE from SYN-RECEIVED: send FIN and transition to FIN-WAIT-1
   instead of jumping directly to CLOSED (RFC 9293 §3.10.4).

4. CLOSE from FIN-WAIT-1/2: return "connection closing" error
   instead of silently transitioning to CLOSED.

5. CLOSE-WAIT sndWnd update: update the send window from incoming
   ACKs so outbound data isn't stalled by a stale window.

6. ACK beyond SND.NXT: send ACK before dropping the segment per
   RFC 9293 §3.10.7.4 step 5.

7. SWS avoidance (RFC 9293 §3.8.6): receiver suppresses small
   window advertisements below min(MSS, bufSize/2); sender defers
   sub-MSS segments when unacked data is in flight (Nagle-like).

8. PAWS validation (RFC 7323 §5): reject segments with timestamp
   regression (TSval < tsRecent), send challenge ACK on drop.

9. Increase DefaultKeepaliveIdle from 30s to 300s.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Coverage Stats

24 of 78 new or added lines in 1 file covered. (30.77%)

2 existing lines in 1 file now uncovered.

3063 of 4327 relevant lines covered (70.79%)

4667.06 hits per line