Jails & multicast?

[Alexander Leidinger]

Hi,

does someone know if multicast is supposed to work in a jail?

I'm playing around with avahi (mDNS / DNS-SD) in a jail. Now that I  
defined a lot of service descriptions for all my jails, I wanted to  
test this and tried to browse the service descriptions via mDNS. But  
somehow I get no output.

The avahi server is in the same jail as the avahi browser. In the  
server output I see connections from the browser, but the browser  
hangs and does not return (-> ctrl+c to abort = last line in the  
following output):
---snip---
dbus-protocol.c: interface=org.freedesktop.Avahi.Server, path=/,  
member=GetAPIVersion
dbus-protocol.c: interface=org.freedesktop.Avahi.Server, path=/,  
member=GetState
dbus-protocol.c: interface=org.freedesktop.Avahi.Server, path=/,  
member=DomainBrowserNew
dbus-protocol.c: client :1.51 vanished.
---snip---

And here some info from ifmcstat.

In the jail:
---snip---
# ifmcstat
dc0:
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
         inet 0.0.0.0
                 group 224.0.0.251
                         igmpv2
                         mcast-macaddr 01:00:5e:00:00:fb refcnt 1
                 group 224.0.0.1
                         mcast-macaddr 01:00:5e:00:00:01 refcnt 1
lo0:
         inet 0.0.0.0
                 group 224.0.0.1
         inet6 ::1:0:0
         inet6 ::1:0:0
                 group ff02::202%lo0 refcnt 1
                 group ff01::1%lo0 refcnt 2
                 group ff02::2:82d1:3fc1%lo0 refcnt 2
                 group ff02::1%lo0 refcnt 2
                 group ff02::1:ff00:1%lo0 refcnt 2
---snip---

And outside the jail:
---snip---
# ifmcstat
dc0:
         inet 192.168.1.2
         inet 192.168.1.100
         inet 192.168.1.101
         inet 192.168.1.102
         inet 192.168.1.103
         inet 192.168.1.104
         inet 192.168.1.105
         inet 192.168.1.106
         inet 192.168.1.107
         inet 192.168.1.108
         inet 192.168.1.110
         inet 192.168.1.111
         inet 192.168.1.113
         inet 192.168.1.114
                 group 224.0.0.251
                         igmpv2
                         mcast-macaddr 01:00:5e:00:00:fb refcnt 1
                 group 224.0.0.1
                         mcast-macaddr 01:00:5e:00:00:01 refcnt 1
lo0:
         inet 127.0.0.1
                 group 224.0.0.1
         inet6 fe80::1%lo0
         inet6 ::1
                 group ff02::202%lo0 refcnt 1
                 group ff01::1%lo0 refcnt 2
                 group ff02::2:82d1:3fc1%lo0 refcnt 2
                 group ff02::1%lo0 refcnt 2
                 group ff02::1:ff00:1%lo0 refcnt 2
---snip---

It's the first time I play around with multicast, any hints how to  
debug this further are welcome. Anything I need to setup so that this  
works? I have options MROUTING in the kernel, but that's all I did  
related to multicast.

Bye,
Alexander.

-- 
The light at the end of the tunnel can be a helluva
nuisance, especially if you're using the tunnel
as a darkroom.

http://www.Leidinger.net    Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org       netchild @ FreeBSD.org  : PGP ID = 72077137