svn commit: r331201 - in stable/11: sbin/ipfw sys/netpfil/ipfw

[Andrey V. Elsukov]

Author: ae
Date: Mon Mar 19 09:52:16 2018
New Revision: 331201
URL: https://svnweb.freebsd.org/changeset/base/331201

Log:
  MFC r330792:
    Do not try to reassemble IPv6 fragments in "reass" rule.
  
    ip_reass() expects IPv4 packet and will just corrupt any IPv6 packets
    that it gets. Until proper IPv6 fragments handling function will be
    implemented, pass IPv6 packets to next rule.
  
    PR:		170604

Modified:
  stable/11/sbin/ipfw/ipfw.8
  stable/11/sys/netpfil/ipfw/ip_fw2.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sbin/ipfw/ipfw.8
==============================================================================
--- stable/11/sbin/ipfw/ipfw.8	Mon Mar 19 08:28:25 2018	(r331200)
+++ stable/11/sbin/ipfw/ipfw.8	Mon Mar 19 09:52:16 2018	(r331201)
@@ -1,7 +1,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 3, 2017
+.Dd March 12, 2018
 .Dt IPFW 8
 .Os
 .Sh NAME
@@ -1135,7 +1135,7 @@ Regardless of matched a packet or not by the
 .Cm tcp-setmss
 rule, the search continues with the next rule.
 .It Cm reass
-Queue and reassemble IP fragments.
+Queue and reassemble IPv4 fragments.
 If the packet is not fragmented, counters are updated and
 processing continues with the next rule.
 If the packet is the last logical fragment, the packet is reassembled and, if

Modified: stable/11/sys/netpfil/ipfw/ip_fw2.c
==============================================================================
--- stable/11/sys/netpfil/ipfw/ip_fw2.c	Mon Mar 19 08:28:25 2018	(r331200)
+++ stable/11/sys/netpfil/ipfw/ip_fw2.c	Mon Mar 19 09:52:16 2018	(r331201)
@@ -2779,8 +2779,10 @@ do {								\
 			case O_REASS: {
 				int ip_off;
 
-				IPFW_INC_RULE_COUNTER(f, pktlen);
 				l = 0;	/* in any case exit inner loop */
+				if (is_ipv6) /* IPv6 is not supported yet */
+					break;
+				IPFW_INC_RULE_COUNTER(f, pktlen);
 				ip_off = ntohs(ip->ip_off);
 
 				/* if not fragmented, go to next rule */