Author: tuexen
Date: Wed Apr 26 20:21:05 2017
New Revision: 317464
URL: https://svnweb.freebsd.org/changeset/base/317464
Log:
Fix an issue with MTU calculation if an ICMP messaeg is received
for an SCTP/UDP packet.
MFC after: 1 week
Modified:
head/sys/netinet/sctp_usrreq.c
head/sys/netinet6/sctp6_usrreq.c
Modified: head/sys/netinet/sctp_usrreq.c
==============================================================================
--- head/sys/netinet/sctp_usrreq.c Wed Apr 26 19:51:10 2017
(r317463)
+++ head/sys/netinet/sctp_usrreq.c Wed Apr 26 20:21:05 2017
(r317464)
@@ -220,11 +220,11 @@ sctp_notify(struct sctp_inpcb *inp,
timer_stopped = 0;
}
/* Update the path MTU. */
+ if (net->port) {
+ next_mtu -= sizeof(struct udphdr);
+ }
if (net->mtu > next_mtu) {
net->mtu = next_mtu;
- if (net->port) {
- net->mtu -= sizeof(struct udphdr);
- }
}
/* Update the association MTU */
if (stcb->asoc.smallest_mtu > next_mtu) {
Modified: head/sys/netinet6/sctp6_usrreq.c
==============================================================================
--- head/sys/netinet6/sctp6_usrreq.c Wed Apr 26 19:51:10 2017
(r317463)
+++ head/sys/netinet6/sctp6_usrreq.c Wed Apr 26 20:21:05 2017
(r317464)
@@ -237,11 +237,11 @@ sctp6_notify(struct sctp_inpcb *inp,
timer_stopped = 0;
}
/* Update the path MTU. */
+ if (net->port) {
+ next_mtu -= sizeof(struct udphdr);
+ }
if (net->mtu > next_mtu) {
net->mtu = next_mtu;
- if (net->port) {
- net->mtu -= sizeof(struct udphdr);
- }
}
/* Update the association MTU */
if (stcb->asoc.smallest_mtu > next_mtu) {
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