netdev - Re: /proc/net/igmp group address encoding

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Message-ID: <alpine.LRH.2.00.0809241418060.31969@netcore.fi>
Date:	Wed, 24 Sep 2008 14:20:48 +0300 (EEST)
From:	Pekka Savola <pekkas@...core.fi>
To:	netdev@...r.kernel.org
Subject: Re: /proc/net/igmp group address encoding

On Wed, 24 Sep 2008, Pekka Savola wrote:
> [psavola@...ps ~]$ more /proc/net/igmp
> Idx	Device    : Count Querier	Group    Users Timer	Reporter
> 1	lo        :     0      V3
> 				010000E0     1 0:00000000		0
> 2	eth0      :     2      V3
> 				010000E0     1 0:00000000		0
> 3	wmaster0  :     3      V3
> 				010000E0     1 0:00000000		0
> 4	wlan0     :     3      V3
> 				 010000E0     1 0:00000000		0
>
> (The header and the fields seem to be a little off in the output..)
>
> [psavola@...ps ~]$ netstat -gn | grep eth0
> eth0            1      224.0.0.1
> eth0            1      ff02::1

Another observation here:  the "Count" field appears to correspond to 
'netstat -gn | wc -l' output.  But this includes both IPv4 and IPv6 
groups.  Is this intentional?  Shouldn't this only count the v4 
entries, just like /proc/net/igmp6 only includes v6 entries?

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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