net: Socket filter ancilliary data access for skb->dev->type
Add an SKF_AD_HATYPE field to the packet ancilliary data area, giving access to skb->dev->type, as reported in the sll_hatype field. When capturing packets on a PF_PACKET/SOCK_RAW socket bound to all interfaces, there doesn't appear to be a way for the filter program to actually find out the underlying hardware type the packet was captured on. This patch adds such ability. This patch also handles the case where skb->dev can be NULL, such as on netlink sockets. Signed-off-by:Paul Evans <leonerd@leonerd.org.uk> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
aa2ea058
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