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[SCTP] Support SO_BINDTODEVICE socket option on incoming packets.

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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>
This commit is contained in:
Neil Horman 2005-06-13 15:11:24 -07:00 committed by David S. Miller
parent 4243cac1e7
commit 0fd9a65a76
1 changed files with 34 additions and 15 deletions
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49
net/sctp/input.c
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@ -178,6 +178,37 @@ int sctp_rcv(struct sk_buff *skb)
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.
* An SCTP packet is called an "out of the blue" (OOTB)
@ -187,22 +218,12 @@ int sctp_rcv(struct sk_buff *skb)
* packet belongs.
*/
if (!asoc) {
ep = __sctp_rcv_lookup_endpoint(&dest);
if (sctp_rcv_ootb(skb)) {
SCTP_INC_STATS_BH(SCTP_MIB_OUTOFBLUES);
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) */
if (skb->stamp.tv_sec == 0) {
do_gettimeofday(&skb->stamp);
@ -265,13 +286,11 @@ int sctp_rcv(struct sk_buff *skb)
discard_release:
/* Release any structures we may be holding. */
if (asoc) {
sock_put(asoc->base.sk);
sock_put(sk);
if (asoc)
sctp_association_put(asoc);
} else {
sock_put(ep->base.sk);
else
sctp_endpoint_put(ep);
}
goto discard_it;
}