Re: system/5063: OpenBGP kroute problem

[Claudio Jeker <claudio_(_at_)_openbsd_(_dot_)_org>]

The following reply was made to PR system/5063; it has been noted by GNATS.

From: Claudio Jeker <claudio_(_at_)_openbsd_(_dot_)_org>
To: cinos_(_at_)_sonic_(_dot_)_netfort_(_dot_)_ru
Cc: gnats_(_at_)_openbsd_(_dot_)_org
Subject: Re: system/5063: OpenBGP kroute problem
Date: Tue, 4 Apr 2006 11:45:32 +0200

 On Fri, Mar 24, 2006 at 06:08:42PM +0300, cinos_(_at_)_sonic_(_dot_)_netfort_(_dot_)_ru wrote:
 > >Number:         5063
 > >Category:       system
 > >Synopsis:       OpenBGP kroute problem
 > >Description:
 > 	OpenBGP kroute.c problem with add and remove tun link0 routing 
 > >How-To-Repeat:
 > 	Step1. ifconfig tun10001 inet 10.0.0.1 netmask 255.255.255.0 link0 up
 > 	Step2. bgpctl show fib connect
 > 	Step3. run bgpd
 > 	Step4. ifconfig tun0 inet 10.0.5.1 netmask 255.255.255.0 link0 up
 > 	Step5. bgpctl show fib connect
 > 	*C    10.0.0.0/24          link#51
 > 	*C    10.0.5.0/24          link#53 - Normal link index
 > 	*C    fe80::%tun10001/64   link#51
 > 	*C    fe80::%tun0/64       link#0  - Error link index
 > 	*C    ff02::%tun10001/32   link#51
 
 I could verfiy this. This is a netinet6 bug. The RTM_ADD sent while adding
 the link local fe80::%tun0 link does not have the correct interface set.
 It seems to be a issue inside netinet6/in6.c:in6_update_ifa() which is
 called by netinet6/in6_ifattach.c:in6_ifattach_linklocal().
 I currently do not have the time to fully debug the problem.
 
 Btw. I created and destroyed multiple tun(4) interfaces but never got a
 bgpd crash. Could you send me your bgpd.conf file (I guess in my config
 something is missinging).
 -- 
 :wq Claudio