ipv4: early demux should be aware of fragments
We should not assume a valid protocol header is present, as this is not the case for IPv4 fragments. Lets avoid extra cache line misses and potential bugs if we actually find a socket and incorrectly uses its dst. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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