tcp: keep SYN-cache entry when sending of challenge ACK fails
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Authored by tuexen on Oct 1 2025, 8:55 PM.

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Reviewers

cc
rscheff
rrs
nickbanks_netflix.com
peter.lei_ieee.org
lstewart
glebius
jtl

Group Reviewers

transport

Commits

rG81ea2bdab13b: tcp: keep SYN-cache entry when sending of challenge ACK fails
rGb7b48ba8420f: tcp: keep SYN-cache entry when sending of challenge ACK fails
rG7841b44f8491: tcp: keep SYN-cache entry when sending of challenge ACK fails

Summary

Don't drop a SYN-cache entry just because a challenge ACK couldn't be sent. This might only be a temporary failure.

Diff Detail

Repository

rG FreeBSD src repository

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Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

tuexen created this revision.Oct 1 2025, 8:55 PM

Herald added a reviewer: transport. · View Herald TranscriptOct 1 2025, 8:55 PM

Herald added subscribers: melifaro, imp. · View Herald Transcript

tuexen requested review of this revision.Oct 1 2025, 8:55 PM

jtl accepted this revision.Oct 1 2025, 9:00 PM

This revision is now accepted and ready to land.Oct 1 2025, 9:00 PM

nickbanks_netflix.com accepted this revision.Oct 1 2025, 9:02 PM

glebius accepted this revision.Oct 1 2025, 11:14 PM

Closed by commit rG7841b44f8491: tcp: keep SYN-cache entry when sending of challenge ACK fails (authored by tuexen). · Explain WhyOct 2 2025, 7:00 AM

This revision was automatically updated to reflect the committed changes.

tuexen added a commit: rG7841b44f8491: tcp: keep SYN-cache entry when sending of challenge ACK fails.

tuexen added a commit: rGb7b48ba8420f: tcp: keep SYN-cache entry when sending of challenge ACK fails.Oct 5 2025, 1:20 PM

tuexen added a commit: rG81ea2bdab13b: tcp: keep SYN-cache entry when sending of challenge ACK fails.Oct 5 2025, 1:31 PM

Revision Contents
Changeset List

Path

Size

sys/

netinet/

tcp_syncache.c

17 lines

Diff 163298

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sys/netinet/tcp_syncache.c

tcp: keep SYN-cache entry when sending of challenge ACK failsClosedPublicActions