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inet: fill request sock ir_iif for IPv4

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Once request socks will be in ehash table, they will need to have
a valid ir_iff field.

This is currently true only for IPv6. This patch extends support
for IPv4 as well.

This means inet_diag_fill_req() can now properly use ir_iif,
which is better for IPv6 link locals anyway, as request sockets
and established sockets will propagate consistent netlink idiag_if.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2015-03-13 15:51:10 -07:00
committed by David S. Miller
parent a3795208b9
commit 16f86165bd
5 changed files with 7 additions and 3 deletions
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3
net/ipv4/tcp_input.c
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@@ -5967,6 +5967,9 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
tcp_openreq_init(req, &tmp_opt, skb, sk);
write_pnet(&inet_rsk(req)->ireq_net, sock_net(sk));
/* Note: tcp_v6_init_req() might override ir_iif for link locals */
inet_rsk(req)->ir_iif = sk->sk_bound_dev_if;
af_ops->init_req(req, sk, skb);
if (security_inet_conn_request(sk, skb, req))