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Subject: [Bug 193246] Bug in IPv6 multicast join(), uncovered by Jenkins
Date: Thu, 04 Sep 2014 16:22:08 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193246

--- Comment #6 from Craig Rodrigues <rodrigc@FreeBSD.org> ---
I'm looking at this from the perspective that
3rd party multicast code written in Java "just works" under Linux
and Solaris, but fails under FreeBSD.

Sure, using an IPv4 socket from the beginning would be the way to go,
but now that will require pushing patches upstream to all Java software
using multicast, in order to accomodate FreeBSD.  It's possible, but not
practical.

It would be nice if the FreeBSD IPv6 stack could be modified
to deal with IPv4-mapped multicast addresses for IPv6, similar to
how Solaris does it.  See comment from Andrey,
http://lists.freebsd.org/pipermail/freebsd-net/2014-September/039686.html

If that could be made to work, then no changes to upstream code would be
required.

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