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net: Use VRF index for oif in ip_send_unicast_reply

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If output device is not specified use VRF device if input device is
enslaved. This is needed to ensure tcp acks and resets go out VRF device.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2015-08-13 14:59:08 -06:00 committed by David S. Miller
parent 3bfd847203
commit f7ba868b71
1 changed files with 6 additions and 1 deletions
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7
net/ipv4/ip_output.c
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@ -1542,6 +1542,7 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
struct net *net = sock_net(sk);
struct sk_buff *nskb;
int err;
int oif;
if (__ip_options_echo(&replyopts.opt.opt, skb, sopt))
return;
@ -1559,7 +1560,11 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
daddr = replyopts.opt.opt.faddr;
}
flowi4_init_output(&fl4, arg->bound_dev_if,
oif = arg->bound_dev_if;
if (!oif && netif_index_is_vrf(net, skb->skb_iif))
oif = skb->skb_iif;
flowi4_init_output(&fl4, oif,
IP4_REPLY_MARK(net, skb->mark),
RT_TOS(arg->tos),
RT_SCOPE_UNIVERSE, ip_hdr(skb)->protocol,