[Bug 261565] [tcpdump] [divert] Permit tcpdump to use a divert(4) socket as a packet source

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 30 Jan 2022 05:20:19 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261565

            Bug ID: 261565
           Summary: [tcpdump] [divert] Permit tcpdump to use a divert(4)
                    socket as a packet source
           Product: Base System
           Version: Unspecified
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: bsdpr@phoe.frmug.org

This is not a bug report but a feature request.

It would be extremely handy if tcpdump(1) could be able to use a divert(4)
socket as a packet source. It could even be handier if several of such sockets
could be used at the same time. For multi-socket operation, the port of the
source socket should be part of the dissection output.

The intended use is to help troubleshoot a defective ipfw ruleset live without
deferring through the ipfwpcap(8) intermediate step.

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