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Update the path mtu when turning on/off UDP encapsulation for SCTP.

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MFC after: 3 days
This commit is contained in:
Michael Tuexen 2016-01-30 16:56:39 +00:00
parent 0edc8cc831
commit 3cf729a920
1 changed files with 33 additions and 12 deletions
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45
sys/netinet/sctp_input.c
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@ -5684,11 +5684,18 @@ sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int lengt
stcb = sctp_findassociation_addr(m, offset, src, dst,
sh, ch, &inp, &net, vrf_id);
#if defined(INET) || defined(INET6)
if ((net != NULL) &&
(ch->chunk_type != SCTP_INITIATION) &&
(port != 0)) {
if ((ch->chunk_type != SCTP_INITIATION) &&
(net != NULL) && (net->port != port)) {
if (net->port == 0) {
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
/* UDP encapsulation turned on. */
net->mtu -= sizeof(struct udphdr);
if (stcb->asoc.smallest_mtu > net->mtu) {
sctp_pathmtu_adjustment(stcb, net->mtu);
}
} else if (port == 0) {
/* UDP encapsulation turned off. */
net->mtu += sizeof(struct udphdr);
/* XXX Update smallest_mtu */
}
net->port = port;
}
@ -5717,11 +5724,18 @@ sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int lengt
stcb = sctp_findassociation_addr(m, offset, src, dst,
sh, ch, &inp, &net, vrf_id);
#if defined(INET) || defined(INET6)
if ((net != NULL) &&
(ch->chunk_type != SCTP_INITIATION) &&
(port != 0)) {
if ((ch->chunk_type != SCTP_INITIATION) &&
(net != NULL) && (net->port != port)) {
if (net->port == 0) {
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
/* UDP encapsulation turned on. */
net->mtu -= sizeof(struct udphdr);
if (stcb->asoc.smallest_mtu > net->mtu) {
sctp_pathmtu_adjustment(stcb, net->mtu);
}
} else if (port == 0) {
/* UDP encapsulation turned off. */
net->mtu += sizeof(struct udphdr);
/* XXX Update smallest_mtu */
}
net->port = port;
}
@ -5831,11 +5845,18 @@ sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int lengt
*/
inp = stcb->sctp_ep;
#if defined(INET) || defined(INET6)
if ((net != NULL) &&
(ch->chunk_type != SCTP_INITIATION) &&
(port != 0)) {
if ((ch->chunk_type != SCTP_INITIATION) &&
(net != NULL) && (net->port != port)) {
if (net->port == 0) {
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
/* UDP encapsulation turned on. */
net->mtu -= sizeof(struct udphdr);
if (stcb->asoc.smallest_mtu > net->mtu) {
sctp_pathmtu_adjustment(stcb, net->mtu);
}
} else if (port == 0) {
/* UDP encapsulation turned off. */
net->mtu += sizeof(struct udphdr);
/* XXX Update smallest_mtu */
}
net->port = port;
}