From 0fd9a65a76e883b7d16e72dde3f8bf20ebc1e82a Mon Sep 17 00:00:00 2001 From: Neil Horman Date: Mon, 13 Jun 2005 15:11:24 -0700 Subject: [PATCH] [SCTP] Support SO_BINDTODEVICE socket option on incoming packets. Signed-off-by: Neil Horman Signed-off-by: Sridhar Samudrala --- net/sctp/input.c | 49 +++++++++++++++++++++++++++++++++--------------- 1 file changed, 34 insertions(+), 15 deletions(-) diff --git a/net/sctp/input.c b/net/sctp/input.c index b719a77d66b4..fffc880a646d 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -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; }