Re: [net-next PATCH] ip: fix mc_loop checks for tunnels with multicast outer addresses

[David Miller <davem@davemloft.net>]

From: Octavian Purdila <opurdila@ixiacom.com>
Date: Mon, 4 Jan 2010 12:48:25 +0200

> On Monday 04 January 2010 07:58:55 you wrote:
> 
>> This won't compile with IPV6 disabled.  Switch closing brace is
>> erroneously inside of the ifdef test.
>> 
> 
> Oops... Here is a new version:
> 
> [PATCH] ip: fix mc_loop checks for tunnels with multicast outer addresses
> 
> When we have L3 tunnels with different inner/outer families
> (i.e. IPV4/IPV6) which use a multicast address as the outer tunnel
> destination address, multicast packets will be loopbacked back to the
> sending socket even if IP*_MULTICAST_LOOP is set to disabled.
> 
> The mc_loop flag is present in the family specific part of the socket
> (e.g. the IPv4 or IPv4 specific part).  setsockopt sets the inner
> family mc_loop flag. When the packet is pushed through the L3 tunnel
> it will eventually be processed by the outer family which if different
> will check the flag in a different part of the socket then it was set.
> 
> Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>

Applied to net-2.6, thanks!