sctp: set the value of flowi6_oif to sk_bound_dev_if to make sctp_v6_get_dst to find...

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@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index f5b45b8b8b16e6965d24cd79b150828a608c2121..2a186b201ad2c20594169633b241dacd0cc971c0 100644 (file)
--- 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);