Author: vangyzen Date: Mon Feb 12 19:49:20 2018 New Revision: 329181 URL: https://svnweb.freebsd.org/changeset/base/329181
Log: Update the MTU in affected routes when IPv6 RA changes the MTU ip6_calcmtu() only looks at the interface MTU if neither the TCP hostcache nor the route provides an MTU. Update the routes so they do not provide stale MTUs. This fixes UNH IPv6 conformance test cases v6LC_4_1_08 and v6LC_4_1_09, which use a RA to reduce the link MTU from 1500 to 1280. Reported and tested by: Farrell Woods <farrell_wo...@dell.com> Reviewed by: dab, melifaro Discussed with: ae MFC after: 1 week Sponsored by: Dell EMC Differential Revision: https://reviews.freebsd.org/D14257 Modified: head/sys/netinet6/nd6_rtr.c Modified: head/sys/netinet6/nd6_rtr.c ============================================================================== --- head/sys/netinet6/nd6_rtr.c Mon Feb 12 19:36:26 2018 (r329180) +++ head/sys/netinet6/nd6_rtr.c Mon Feb 12 19:49:20 2018 (r329181) @@ -408,8 +408,11 @@ nd6_ra_input(struct mbuf *m, int off, int icmp6len) int change = (ndi->linkmtu != mtu); ndi->linkmtu = mtu; - if (change) /* in6_maxmtu may change */ + if (change) { + /* in6_maxmtu may change */ in6_setmaxmtu(); + rt_updatemtu(ifp); + } } else { nd6log((LOG_INFO, "nd6_ra_input: bogus mtu " "mtu=%lu sent from %s; " _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
