net: ipv6: add second dif to udp socket lookups
Add a second device index, sdif, to udp socket lookups. sdif is the index for ingress devices enslaved to an l3mdev. It allows the lookups to consider the enslaved device as well as the L3 domain when searching for a socket. Early demux lookups are handled in the next patch as part of INET_MATCH changes. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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