Author: sbruno
Date: Mon Oct 13 21:05:29 2014
New Revision: 273062
URL: https://svnweb.freebsd.org/changeset/base/273062
Log:
Catch ipv6 case when attempting to do PLPMTUD blackhole detection.
Submitted by: Mikhail <m...@lenta.ru>
MFC after: 2 weeks
Relnotes: yes
Modified:
head/sys/netinet/tcp_output.c
Modified: head/sys/netinet/tcp_output.c
==============================================================================
--- head/sys/netinet/tcp_output.c Mon Oct 13 21:04:14 2014
(r273061)
+++ head/sys/netinet/tcp_output.c Mon Oct 13 21:05:29 2014
(r273062)
@@ -1273,6 +1273,11 @@ send:
*/
ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(*ip6));
+ if (V_path_mtu_discovery && tp->t_maxopd > V_tcp_minmss)
+ tp->t_flags2 |= TF2_PLPMTU_PMTUD;
+ else
+ tp->t_flags2 &= ~TF2_PLPMTU_PMTUD;
+
if (tp->t_state == TCPS_SYN_SENT)
TCP_PROBE5(connect__request, NULL, tp, ip6, tp, th);
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