sockstat(1): print out full connection graph for unix(4) sockets
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Authored by glebius on Jul 6 2022, 9:21 AM.

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network
manpages

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rG2c436d4890c7: sockstat(1): print out full connection graph for unix(4) sockets

Summary

Kernel provides us with enough information to display all possible
connections between UNIX sockets.

o Store unp_conn, xu_firstref and xu_nextref in the faddr of a UNIX sock.
o Build tree of file descriptors, indexed by the socket pointer.
o In displaysock() print out all possible information:

if socket is bound, print name of this socket
if socket has connected to a peer with a name, print peers name
if socket has connected to a peer without a name, print [pid fd]
if a bound socket has received connections, print list of them as [pid fd] Previously, only 1) either 2) were printed.

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Repository

rG FreeBSD src repository

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Event Timeline

glebius created this revision.Jul 6 2022, 9:21 AM

Herald added a reviewer: manpages. · View Herald TranscriptJul 6 2022, 9:21 AM

Herald added a subscriber: imp. · View Herald Transcript

glebius requested review of this revision.Jul 6 2022, 9:21 AM

Harbormaster completed remote builds in B46282: Diff 107813.Jul 6 2022, 9:21 AM

glebius added a parent revision: D35725: sockstat(1): widen the FD printing format.Jul 6 2022, 9:21 AM

glebius added a child revision: D35727: sockstat(1): print PID adjusted to the right.

Example output lines:

glebius  pulseaudio  1843 32  stream /tmp/pulse-NlQ2RYGlYGh0/native -> [71518 116]
glebius  firefox    71518 116 stream -> /tmp/pulse-NlQ2RYGlYGh0/native
root     automountd  1477 3   dgram  -> /var/run/log
root     syslogd     1440 6   dgram  /var/run/log <- [1824 15],[1843 3],[1506 3],[1477 3],[1168 8]
unbound  local-unbo  1242 5   stream /var/run/local_unbound.ctl
unbound  local-unbo  1242 6   stream -> [1242 7]
glebius  sockstat   76162 6   stream -> [76155 8]
glebius  sockstat   76155 8   stream -> [76162 6]

tuexen accepted this revision.Jul 6 2022, 9:52 AM

This revision is now accepted and ready to land.Jul 6 2022, 9:52 AM

Rebase

This revision now requires review to proceed.Jul 6 2022, 8:03 PM

Harbormaster completed remote builds in B46300: Diff 107861.Jul 6 2022, 8:03 PM

tuexen accepted this revision.Jul 6 2022, 8:21 PM

This revision is now accepted and ready to land.Jul 6 2022, 8:21 PM

Closed by commit rG2c436d4890c7: sockstat(1): print out full connection graph for unix(4) sockets (authored by glebius). · Explain WhyJul 7 2022, 5:22 AM

This revision was automatically updated to reflect the committed changes.

glebius added a commit: rG2c436d4890c7: sockstat(1): print out full connection graph for unix(4) sockets.