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Commit 0fd9a65a authored by Neil Horman's avatar Neil Horman Committed by David S. Miller
Browse files

[SCTP] Support SO_BINDTODEVICE socket option on incoming packets. 



Signed-off-by: default avatarNeil Horman <nhorman@redhat.com>
Signed-off-by: default avatarSridhar Samudrala <sri@us.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4243cac1

net/sctp/input.c

+34 −15
Original line number Original line Diff line number Diff line
@@ -178,6 +178,37 @@ int sctp_rcv(struct sk_buff *skb) 




	asoc = __sctp_rcv_lookup(skb, &src, &dest, &transport);

	asoc = __sctp_rcv_lookup(skb, &src, &dest, &transport);





	if (!asoc)

		ep = __sctp_rcv_lookup_endpoint(&dest);



	/* Retrieve the common input handling substructure. */

	rcvr = asoc ? &asoc->base : &ep->base;

	sk = rcvr->sk;



	/*

	 * If a frame arrives on an interface and the receiving socket is

	 * bound to another interface, via SO_BINDTODEVICE, treat it as OOTB

	 */

	if (sk->sk_bound_dev_if && (sk->sk_bound_dev_if != af->skb_iif(skb)))

	{

		sock_put(sk);

		if (asoc) {

			sctp_association_put(asoc);

			asoc = NULL;

		} else {

			sctp_endpoint_put(ep);

			ep = NULL;

		}

		sk = sctp_get_ctl_sock();

		ep = sctp_sk(sk)->ep;

		sctp_endpoint_hold(ep);

		sock_hold(sk);

		rcvr = &ep->base;

	}



	if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)

		goto discard_release;



	/*

	/*

	 * RFC 2960, 8.4 - Handle "Out of the blue" Packets.

	 * RFC 2960, 8.4 - Handle "Out of the blue" Packets.

	 * An SCTP packet is called an "out of the blue" (OOTB)

	 * An SCTP packet is called an "out of the blue" (OOTB)
@@ -187,22 +218,12 @@ int sctp_rcv(struct sk_buff *skb) 
	 * packet belongs.

	 * packet belongs.

	 */

	 */

	if (!asoc) {

	if (!asoc) {

		ep = __sctp_rcv_lookup_endpoint(&dest);

		if (sctp_rcv_ootb(skb)) {

		if (sctp_rcv_ootb(skb)) {

			SCTP_INC_STATS_BH(SCTP_MIB_OUTOFBLUES);

			SCTP_INC_STATS_BH(SCTP_MIB_OUTOFBLUES);

			goto discard_release;

			goto discard_release;

		}

		}

	}

	}





	/* Retrieve the common input handling substructure. */

	rcvr = asoc ? &asoc->base : &ep->base;

	sk = rcvr->sk;



	if ((sk) && (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)) {

		goto discard_release;

	}





	/* SCTP seems to always need a timestamp right now (FIXME) */

	/* SCTP seems to always need a timestamp right now (FIXME) */

	if (skb->stamp.tv_sec == 0) {

	if (skb->stamp.tv_sec == 0) {

		do_gettimeofday(&skb->stamp);

		do_gettimeofday(&skb->stamp);
@@ -265,13 +286,11 @@ discard_it: 




discard_release:

discard_release:

	/* Release any structures we may be holding. */

	/* Release any structures we may be holding. */

	if (asoc) {

	sock_put(sk);

		sock_put(asoc->base.sk);

	if (asoc)

		sctp_association_put(asoc);

		sctp_association_put(asoc);

	} else {

	else

		sock_put(ep->base.sk);

		sctp_endpoint_put(ep);

		sctp_endpoint_put(ep);

	}





	goto discard_it;

	goto discard_it;

}

}