diff options
Diffstat (limited to 'net/sctp/input.c')
| -rw-r--r-- | net/sctp/input.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/net/sctp/input.c b/net/sctp/input.c index 83d58d42ea45..fe6429cc012f 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -645,6 +645,36 @@ int sctp_v4_err(struct sk_buff *skb, __u32 info) return 0; } +int sctp_udp_v4_err(struct sock *sk, struct sk_buff *skb) +{ + struct net *net = dev_net(skb->dev); + struct sctp_association *asoc; + struct sctp_transport *t; + struct icmphdr *hdr; + __u32 info = 0; + + skb->transport_header += sizeof(struct udphdr); + sk = sctp_err_lookup(net, AF_INET, skb, sctp_hdr(skb), &asoc, &t); + if (!sk) { + __ICMP_INC_STATS(net, ICMP_MIB_INERRORS); + return -ENOENT; + } + + skb->transport_header -= sizeof(struct udphdr); + hdr = (struct icmphdr *)(skb_network_header(skb) - sizeof(struct icmphdr)); + if (hdr->type == ICMP_REDIRECT) { + /* can't be handled without outer iphdr known, leave it to udp_err */ + sctp_err_finish(sk, t); + return 0; + } + if (hdr->type == ICMP_DEST_UNREACH && hdr->code == ICMP_FRAG_NEEDED) + info = ntohs(hdr->un.frag.mtu); + sctp_v4_err_handle(t, skb, hdr->type, hdr->code, info); + + sctp_err_finish(sk, t); + return 1; +} + /* * RFC 2960, 8.4 - Handle "Out of the blue" Packets. * |