Re: Fix ipt_REJECT problem with nf_bridge

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Jan Engelhardt wrote:
> FYI: This is talking about "pure"-bridged traffic, i.e. traffic that will
> go from one bridge port to another without touching the "routing decision"
> box in [1]. In iptables terminology, that's
> 
> 	FORWARD -i br0 -o br0
> 
> style traffic. Since the RST packet REJECT creates goes through
> OUTPUT, so I would assume no forwarding would take place, and the
> ip_forward flag not be relevant. The BRNF_BRIDGED clause therefore
> seems wrong because it will always be a non-local saddr.

I can understand this better now based on your explanation :-)
But I think this clause is okay.

The addr_type == RTN_LOCAL path works for pure bridged traffic
because ip_route_me_harder() avoids routing using saddr if
saddr is foreign.

We can't specify addr_type != RTN_LOCAL for the pure bridging case,
because that tries to route the RST as though we received it
from the network, which will fail if ip forwarding is disabled.

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