>Number: 183065
>Category: kern
>Synopsis: ipfilter to/fastroute should use correct FIB
>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: Thu Oct 17 17:10:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: G. Paul Ziemba
>Release: 9.1
>Organization:
>Environment:
FreeBSD hairball.ziemba.us 9.1-STABLE FreeBSD 9.1-STABLE #10 r249454M: Mon Oct
7 23:27:47 PDT 2013 root@hairball:/usr/obj/usr/src/sys/GPZ-130412 amd64
>Description:
If you have an ipfilter rule using option "to <interface name>" such as:
pass in log quick on em0.101 to dc0 from any to 192.168.0.0/24
and the interfaces in question have a non-default FIB associated with them, e.g.
dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=80008<VLAN_MTU,LINKSTATE>
ether 00:00:d1:1a:c0:e5
inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
fib: 1
em0.101: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
1500
options=103<RXCSUM,TXCSUM,TSO4>
ether 00:30:48:dd:37:ac
inet 10.126.0.1 netmask 0xffff0000 broadcast 10.126.255.255
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
fib: 1
vlan: 101 parent interface: em0
then ipfilter wrongly looks up the destination in FIB 0.
>How-To-Repeat:
Configure ipfilter to use to/fastforward between interfaces using non-0 FIB.
>Fix:
Please see attached patch
Patch attached with submission follows:
--- /usr/src/sys/contrib/ipfilter/netinet/ip_fil_freebsd.c.orig 2013-04-12
23:27:26.000000000 -0700
+++ /usr/src/sys/contrib/ipfilter/netinet/ip_fil_freebsd.c 2013-10-06
23:19:59.000000000 -0700
@@ -984,7 +984,7 @@
dst->sin_addr = fdp->fd_ip;
dst->sin_len = sizeof(*dst);
- in_rtalloc(ro, 0);
+ in_rtalloc(ro, M_GETFIB(m0));
if ((ifp == NULL) && (ro->ro_rt != NULL))
ifp = ro->ro_rt->rt_ifp;
>Release-Note:
>Audit-Trail:
>Unformatted:
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