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From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Sun, 1 Dec 2019 16:14:44 +0000 (UTC)
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Subject: svn commit: r355264 - head/sys/netinet6
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Author: tuexen
Date: Sun Dec  1 16:14:44 2019
New Revision: 355264
URL: https://svnweb.freebsd.org/changeset/base/355264

Log:
  Update the hostcache also for PTB messages received for SCTP/IPv6.
  The corresponding code for SCTP/IPv4 was introduced in
  https://svnweb.freebsd.org/base?view=revision&revision=317597
  
  Submitted by:		Julius Flohr
  MFC after:		1 week
  Differential Revision:	https://reviews.freebsd.org/D22605

Modified:
  head/sys/netinet6/sctp6_usrreq.c

Modified: head/sys/netinet6/sctp6_usrreq.c
==============================================================================
--- head/sys/netinet6/sctp6_usrreq.c	Sun Dec  1 16:02:15 2019	(r355263)
+++ head/sys/netinet6/sctp6_usrreq.c	Sun Dec  1 16:14:44 2019	(r355264)
@@ -240,6 +240,11 @@ sctp6_notify(struct sctp_inpcb *inp,
 		}
 		if (net->mtu > next_mtu) {
 			net->mtu = next_mtu;
+			if (net->port) {
+				sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr));
+			} else {
+				sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu);
+			}
 		}
 		/* Update the association MTU */
 		if (stcb->asoc.smallest_mtu > next_mtu) {