[TCP]: Honour sk_bound_dev_if in tcp_v4_send_ack A time_wait socket inherits sk_bound_dev_if from the original socket, but it is not used when sending ACK packets using ip_send_reply. Fix by passing the oif to ip_send_reply in struct ip_reply_arg and use it for output routing. Signed-off-by: Patrick McHardy --- commit 19b6cbad06d246d48168fc6c493a7c3d9db58e1f tree a355cf3bf552a5fbab5b874f38a964f5f90a68c5 parent 184b812f7da6726d7ea4ca409c7a8762ff6c6df6 author Patrick McHardy Fri, 01 Jun 2007 17:52:23 +0200 committer Patrick McHardy Fri, 01 Jun 2007 17:52:23 +0200 include/net/ip.h | 1 + net/ipv4/ip_output.c | 4 +++- net/ipv4/tcp_ipv4.c | 1 + 3 files changed, 5 insertions(+), 1 deletions(-) diff --git a/include/net/ip.h b/include/net/ip.h index bb207db..abf2820 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -143,6 +143,7 @@ struct ip_reply_arg { __wsum csum; int csumoffset; /* u16 offset of csum in iov[0].iov_base */ /* -1 if not needed */ + int bound_dev_if; }; void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg, diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index d6427d9..34ea454 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -1352,7 +1352,8 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar } { - struct flowi fl = { .nl_u = { .ip4_u = + struct flowi fl = { .oif = arg->bound_dev_if, + .nl_u = { .ip4_u = { .daddr = daddr, .saddr = rt->rt_spec_dst, .tos = RT_TOS(ip_hdr(skb)->tos) } }, @@ -1376,6 +1377,7 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar inet->tos = ip_hdr(skb)->tos; sk->sk_priority = skb->priority; sk->sk_protocol = ip_hdr(skb)->protocol; + sk->sk_bound_dev_if = arg->bound_dev_if; ip_append_data(sk, ip_reply_glue_bits, arg->iov->iov_base, len, 0, &ipc, rt, MSG_DONTWAIT); if ((skb = skb_peek(&sk->sk_write_queue)) != NULL) { diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 5a3e7f8..d3924c7 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -702,6 +702,7 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk, ip_hdr(skb)->saddr, /* XXX */ arg.iov[0].iov_len, IPPROTO_TCP, 0); arg.csumoffset = offsetof(struct tcphdr, check) / 2; + arg.bound_dev_if = twsk->tw_sk.tw_bound_dev_if; ip_send_reply(tcp_socket->sk, skb, &arg, arg.iov[0].iov_len);