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![Hannes Frederic Sowa](https://secure.gravatar.com/avatar/10c9b35ebec59e674bfa641e3b17a9b8.jpg?s=96&d=mm)
Hannes Frederic Sowa committed 82b276cd2b0
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>