Re: Kernel Routing sequence
From: Al Boldi
Date: Mon Aug 15 2005 - 14:50:20 EST
Soininen Jonne (Nokia-NET/Helsinki) wrote:
> Al, why are you worried that the echo reply goes out from a
> different interface? It might be easier to understand what you want
> if we would understand the problem.
The problem is that the kernel is routing according to a fixed view of
allowed subnets, ie: overlapping subnets are not treated distinctly.
It should be possible for the kernel to detect an IP subnet-collision
on packet pickup, something like:
eth0 is listening on 10.0.0.0/8
eth0 picks up 10.0.1.2 on 10.0.0.0/8
kernel checks the route table
kernel discovers collision with 10.0.1.0/24 on eth1
kernel adds 10.0.1.2/32 route on eth0 to ensure correct routing for
This behaviour should be the default and be transparent.
This is the idea, although it will eventually overflow the route
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