tree ffc8648efa91f83f81c94ac83447dc5246a835cf
parent 446fab59333dea91e54688f033dd8d788d0486fb
author Hannes Frederic Sowa <hannes@stressinduktion.org> 1390191399 +0100
committer David S. Miller <davem@davemloft.net> 1390352359 -0800

ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts

Some ipv6 protocols cannot handle ipv4 addresses, so we must not allow
connecting and binding to them. sendmsg logic does already check msg->name
for this but must trust already connected sockets which could be set up
for connection to ipv4 address family.

Per-socket flag ipv6only is of no use here, as it is under users control
by setsockopt.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>