linux-kernel - Re: Killing a network connection

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Date:	Tue, 16 Oct 2007 11:31:21 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Bodo Eggert <7eggert@....de>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Stefan Monnier <monnier@....umontreal.ca>
Subject: Re: Killing a network connection

On Tue, Oct 16, 2007 at 01:50:55AM +0200, Bodo Eggert wrote:
> Andi Kleen <andi@...stfloor.org> wrote:
> > Stefan Monnier <monnier@....umontreal.ca> writes:
> 
> >> The main use for me is to deal with dangling connections due to taking
> >> network interfaces up&down with different IP addresses (typically the wlan0
> >> interface where the IP is different because I've modes from an AP to
> >> another).  Of course, maybe there's another way to solve this particular
> >> problem, in case I'd like to hear about it as well.
> > 
> > Long ago I did a 2.4 patch that solved exactly this problem. It introduced
> > a new ifconfig flag "dynamic" and when a dynamic address went down
> > all TCP connections originating from it were killed. It's still available
> > in older SUSE releases. I might post a forward port later.
> 
> There is a /proc/sys/net/ipv4/ip_dynaddr sysctl in 2.6.21.

That only handles SYN_SENT and does something different (it rewrites
the source address)

-Andi
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