tree 58bf7212d6bebd30ec6477f84440cbbd8dbb3bb1
parent 5962b35c1de3254a2f03b95efd3b7854b874d7b7
author Shawn Lu <shawn.lu@ericsson.com> 1328359089 +0000
committer David S. Miller <davem@davemloft.net> 1328397605 -0500

tcp_v4_send_reset: binding oif to iif in no sock case

Binding RST packet outgoing interface to incoming interface
for tcp v4 when there is no socket associate with it.
when sk is not NULL, using sk->sk_bound_dev_if instead.
(suggested by Eric Dumazet).

This has few benefits:
1. tcp_v6_send_reset already did that.
2. This helps tcp connect with SO_BINDTODEVICE set. When
connection is lost, we still able to sending out RST using
same interface.
3. we are sending reply, it is most likely to be succeed
if iif is used

Signed-off-by: Shawn Lu <shawn.lu@ericsson.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>