[Bug 274656] net/igmpproxy: Patch to fix membership query packet checksums.

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 22 Oct 2023 20:30:36 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274656

            Bug ID: 274656
           Summary: net/igmpproxy:  Patch to fix membership query packet
                    checksums.
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: blubblub@mail.ru
                CC: franco@opnsense.org
             Flags: maintainer-feedback?(franco@opnsense.org)
                CC: franco@opnsense.org

Created attachment 245806
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=245806&action=edit
Patch that fixes the issue for me.

igmpproxy for quite some while, I suspect some change in 14.0, did not seem to
work for me. After some debugging it seems the IGMPv2 membership query packets
created had a wrong checksum, which lead some clients to ignore those and not
send answers, thereby causing them to be dropped and streams being interrupted
(after roughly ~12.5 sec, which is the protocol timeout).

Given that information I then found https://redmine.pfsense.org/issues/13929
and did some testing and that patch seems to fix the issue for me.

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