misc/159006: net/quagga - multicast broken in ripd

[Eugene M. Zheganin]

>Number:         159006
>Category:       misc
>Synopsis:       net/quagga - multicast broken in ripd
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 18 04:20:07 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Eugene M. Zheganin
>Release:        8.2-RELEASE
>Organization:
RealService LLC
>Environment:
FreeBSD wizard.hq.norma.perm.ru 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Fri Mar 25 13:08:09 YEKT 2011     emz at ns.hq.norma.perm.ru:/usr/obj/usr/src/sys/WIZARD  i386
>Description:
Multicast not working in ripd.

I recieve tonns of messages like:

Jul  1 15:35:24 wizard ripd[68677]: Can't setsockopt IP_MULTICAST_IF on fd 11
to source address 172.16.0.7 for interface gre14

gre14 (like any other gre interface) may look like:

# ifconfig gre14
gre14: flags=b051<UP,POINTOPOINT,RUNNING,LINK0,LINK1,MULTICAST> metric 0 mtu
1476
        tunnel inet 89.250.210.69 --> 89.250.210.142
        inet 172.16.0.6 --> 172.16.0.7 netmask 0xffffffff

Packets sent to 224.0.0.9:520 cannot traverse gre interface, and they go using
default route.
However, multicast works just fine on gre interfaces in ospfd.

I use unicast and direct neighbor defining as a temporary solution.

Unfortunately, I'm stuck with the RIP as it's the only routing protocol on the Cisco routers series 85[, 86x and I have lots of these.

I have filled a bug in quagga's bugzilla, but noone reacted so far.
>How-To-Repeat:
Install FreeBSD net/quagga port, get one of the low-end Cisco routers, confugure RIP, see the logs.
>Fix:
None known.

>Release-Note:
>Audit-Trail:
>Unformatted: