From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Tue, 18 Feb 2014 20:38:08 +0000 (+0100)
Subject: ipv6: honor IPV6_PKTINFO with v4 mapped addresses on sendmsg
X-Git-Tag: v3.15-rc1~113^2~297
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c8e6ad0829a723a74cd2fea9996a3392d2579a18;p=pandora-kernel.git

ipv6: honor IPV6_PKTINFO with v4 mapped addresses on sendmsg

In case we decide in udp6_sendmsg to send the packet down the ipv4
udp_sendmsg path because the destination is either of family AF_INET or
the destination is an ipv4 mapped ipv6 address, we don't honor the
maybe specified ipv4 mapped ipv6 address in IPV6_PKTINFO.

We simply can check for this option in ip_cmsg_send because no calls to
ipv6 module functions are needed to do so.

Reported-by: Gert Doering <gert@space.net>
Cc: Tore Anderson <tore@fud.no>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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