Differential D48663

tcp: Add a sysctl to affect listening socket behaviour
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Authored by markj on Jan 24 2025, 5:04 PM.

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network
transport

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rGaa6163ff658b: tcp: Add a sysctl to modify listening socket FIB inheritance
rG5dc99e9bb985: tcp: Add a sysctl to modify listening socket FIB inheritance

Summary

Introduce the net.inet.tcp.bind_all_fibs tunable, set to 1 by default
for compatibility with current behaviour. When set to 0, all TCP
listening sockets are private to their FIB. Inbound connection requests
will only succeed if a matching inpcb is bound to the same FIB as the
request.

No functional change intended, as the new behaviour is not enabled by
default.

Sponsored by: Klara, Inc.
Sponsored by: Stormshield

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rG FreeBSD src repository

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Event Timeline

markj created this revision.Jan 24 2025, 5:04 PM

Herald added a reviewer: transport. · View Herald TranscriptJan 24 2025, 5:04 PM

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

markj requested review of this revision.Jan 24 2025, 5:04 PM

Harbormaster completed remote builds in B62005: Diff 149925.Jan 24 2025, 5:04 PM

markj added a parent revision: D48662: inpcb: Add FIB-aware inpcb lookup.Jan 24 2025, 5:04 PM

markj added a child revision: D48664: udp: Add a sysctl to control binding.

glebius accepted this revision as: glebius.Jan 24 2025, 5:37 PM

This revision was not accepted when it landed; it landed in state Needs Review.Feb 6 2025, 4:28 PM

Closed by commit rG5dc99e9bb985: tcp: Add a sysctl to modify listening socket FIB inheritance (authored by markj). · Explain Why

This revision was automatically updated to reflect the committed changes.

markj added a commit: rG5dc99e9bb985: tcp: Add a sysctl to modify listening socket FIB inheritance.

markj added a commit: rGaa6163ff658b: tcp: Add a sysctl to modify listening socket FIB inheritance.Feb 21 2025, 1:57 AM

Herald added a subscriber: ziaee. · View Herald TranscriptFeb 21 2025, 1:57 AM

Revision Contents
Changeset List

Path

Size

share/

man/

man4/

32 lines

sys/

netinet/

8 lines

12 lines

2 lines

Diff 150630

share/man/man4/tcp.4

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sys/netinet/tcp_input.c

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sys/netinet/tcp_usrreq.c

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sys/netinet/tcp_var.h

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