tree cc6b01589816d1e450f0d0ba56d388c44db9d7b9
parent 77544e6953d8a4c7d271b0da299092b980b15fda
author Mikio Hara <mikioh.public.networking@gmail.com> 1552988187 +0900
committer Mikio Hara <mikioh.public.networking@gmail.com> 1553064053 +0000

ipv4: work around FreeBSD 11.3 or 12 kernel running COMPAT_FREEBSD32

On FreeBSD 11.3 or 12 kernel running COMPAT_FREEBSD32, it looks like the
system call recvmsg always returns an incorrect length for the
out-of-band data. This change adjusts the length when it looks incorrect
and the running kernel is FreeBSD 11.3 or above.

Fixes golang/go#30899.

Change-Id: Ia58d8b4bd4caf3783d2e38161ee4afd1a64ca522
Reviewed-on: https://go-review.googlesource.com/c/net/+/168297
Run-TryBot: Mikio Hara <mikioh.public.networking@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>