K 10
svn:author
V 6
bryanv
K 8
svn:date
V 27
2014-10-09T05:17:47.667045Z
K 7
svn:log
V 460
Check for mbuf copy failure when there are multiple multicast sockets

This partitular case is the only path where the mbuf could be NULL.
udp_append() checked for a NULL mbuf only after invoking the tunneling
callback. Our only in tree tunneling callback - SCTP - assumed a non
NULL mbuf, and it is a bit odd to make the callbacks responsible for
checking this condition.

This also reduces the differences between the IPv4 and IPv6 code.

MFC after:	1 month

END