Date: Fri, 12 Mar 2004 17:43:53 +0100 (CET) From: Antonio Tapiador del Dujo <atapiador@dit.upm.es> To: FreeBSD-gnats-submit@FreeBSD.org Cc: atd@dit.upm.es Subject: kern/64167: [patch] IPFilter IPv6 fastroute - MTU bug Message-ID: <200403121643.i2CGhrua000948@curie.dit.upm.es> Resent-Message-ID: <200403121550.i2CFoLka054077@freefall.freebsd.org>
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>Number: 64167 >Category: kern >Synopsis: [patch] IPFilter IPv6 fastroute - MTU bug >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Mar 12 07:50:19 PST 2004 >Closed-Date: >Last-Modified: >Originator: Antonio Tapiador del Dujo >Release: FreeBSD 5.2.1-RELEASE >Organization: DIT - UPM >Environment: System: FreeBSD x.dit.upm.es 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #8: Fri Mar 12 16:09:48 CET 2004 root@x.dit.upm.es:/usr/src/sys/i386/compile/MH-2 i386 IP Filter: v3.4.31 >Description: Using ipfilter IPv6 fastroute on rl0 to gif0:<ip6_addr> (moving packets to IPv6 over IPv6 tunnel interface) fails. In /usr/src/sys/contrib/ipfilter/netinet/ip_fil.c, function fastroute6, line 2022, ND_IFINFO(ifp)->linkmtu gives 0 mtu size >How-To-Repeat: Creating an IPv6oIPv6 tunnel and setting ipfilter ipv6 rule like: pass out on rl0 to gif0:<ip6_addr> from <ip6_prefix>::/80 to any >Fix: Remplacing ND_IFINFO(ifp)->linkmtu with IN6_LINKMTU(ifp) gives the correct mtu value >Release-Note: >Audit-Trail: >Unformatted:
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