On Mon, Jan 16, 2006 at 08:08:19AM +0100, Patrick McHardy wrote:
> 
> I can't figure out how this can happen. If a local outgoing multicast
> packet would have been SNATed to a non-local IP, ip_route_input would
> have been used by ip_route_me_harder. In that case we should see
> ip_output instead of ip_mc_output in the backtrace. But it definitely
> looks related to the rerouting changes in the NAT code.

The reason it stays in ip_mc_output is because the SNAT is performed
by the POST_ROUTING hook in ip_mc_output.  So it's too late to get out
of it.  

Because at this stage in the stack we no longer look at dst->output the
skb is simply passed onto ip_finish_output and then ip_finish_output2.

Cheers,
-- 
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