[PATCH] sctp: set the value of flowi6_oif to sk_bound_dev_if to make sctp_v6_get_dst to find the correct route entry.

[Zheng Li]

From: Zheng Li <james.z.li@xxxxxxxxxxxx>

if there are several same route entries with different outgoing net device,
application's socket specifies the oif through setsockopt with
SO_BINDTODEVICE, sctpv6 should choose the route entry whose outgoing net
device is the oif which was specified by socket, set the value of
flowi6_oif to sk->sk_bound_dev_if to make sctp_v6_get_dst to find the
correct route entry.

Signed-off-by: Zheng Li <james.z.li@xxxxxxxxxxxx>
---
 net/sctp/ipv6.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index f5b45b8..2a186b20 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -252,6 +252,8 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
 	fl6->flowi6_proto = IPPROTO_SCTP;
 	if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
 		fl6->flowi6_oif = daddr->v6.sin6_scope_id;
+	else if (asoc)
+		fl6->flowi6_oif = asoc->base.sk->sk_bound_dev_if;
 
 	pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr);
 
-- 
2.7.4