[SCTP] Support SO_BINDTODEVICE socket option on incoming packets.
Signed-off-by: Neil Horman <nhorman@redhat.com> Signed-off-by: Sridhar Samudrala <sri@us.ibm.com Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -178,6 +178,37 @@ int sctp_rcv(struct sk_buff *skb)
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asoc = __sctp_rcv_lookup(skb, &src, &dest, &transport);
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if (!asoc)
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ep = __sctp_rcv_lookup_endpoint(&dest);
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/* Retrieve the common input handling substructure. */
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rcvr = asoc ? &asoc->base : &ep->base;
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sk = rcvr->sk;
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/*
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* If a frame arrives on an interface and the receiving socket is
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* bound to another interface, via SO_BINDTODEVICE, treat it as OOTB
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*/
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if (sk->sk_bound_dev_if && (sk->sk_bound_dev_if != af->skb_iif(skb)))
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{
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sock_put(sk);
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if (asoc) {
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sctp_association_put(asoc);
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asoc = NULL;
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} else {
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sctp_endpoint_put(ep);
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ep = NULL;
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}
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sk = sctp_get_ctl_sock();
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ep = sctp_sk(sk)->ep;
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sctp_endpoint_hold(ep);
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sock_hold(sk);
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rcvr = &ep->base;
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}
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if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
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goto discard_release;
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/*
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* RFC 2960, 8.4 - Handle "Out of the blue" Packets.
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* An SCTP packet is called an "out of the blue" (OOTB)
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@ -187,22 +218,12 @@ int sctp_rcv(struct sk_buff *skb)
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* packet belongs.
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*/
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if (!asoc) {
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ep = __sctp_rcv_lookup_endpoint(&dest);
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if (sctp_rcv_ootb(skb)) {
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SCTP_INC_STATS_BH(SCTP_MIB_OUTOFBLUES);
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goto discard_release;
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}
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}
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/* Retrieve the common input handling substructure. */
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rcvr = asoc ? &asoc->base : &ep->base;
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sk = rcvr->sk;
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if ((sk) && (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)) {
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goto discard_release;
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}
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/* SCTP seems to always need a timestamp right now (FIXME) */
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if (skb->stamp.tv_sec == 0) {
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do_gettimeofday(&skb->stamp);
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@ -265,13 +286,11 @@ discard_it:
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discard_release:
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/* Release any structures we may be holding. */
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if (asoc) {
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sock_put(asoc->base.sk);
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sock_put(sk);
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if (asoc)
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sctp_association_put(asoc);
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} else {
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sock_put(ep->base.sk);
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else
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sctp_endpoint_put(ep);
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}
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goto discard_it;
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}
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