netdev - Re: Established sockets remain open after iface down or address lost

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Message-ID: <20131001170740.GA9331@cverges-dev-lnx.sentient-energy.com>
Date:	Tue, 1 Oct 2013 10:07:40 -0700
From:	Chris Verges <cverges@...tient-energy.com>
To:	Alexey Kuznetsov <kuznet@....inr.ac.ru>
Cc:	David Miller <davem@...emloft.net>, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, netdev@...r.kernel.org
Subject: Re: Established sockets remain open after iface down or address lost

On Tue, Oct 01, 2013 at 08:33:04PM +0400, Alexey Kuznetsov wrote:
> > P.S.  I apologize in advance if I missed this answer in the netdev
> > archives.
> 
> FYI googling f.e. "netdev tcp remove local address" instantly  finds
> all that you want to know. Namrly, subj: Re: "TCP shutdown behaviour
> when deleting local IP addresses"

Oustanding.  Thank you!  I really appreciate the pointer to bring me up
to speed on the history.  It sounds like Mikael and I share a similar
desire and rationale for why such a thing would be useful.

Your comment regarding the tcp hash table scanning is what I was
planning to code up, though it sounds like some amount of effort was
made in this attempt and abandoned.  Would you happen to know where any
out-of-kernel code related to this might be parked if one wanted to
continue this effort?

I do agree with Mikael that offloading this from the kernel to some kind
of connection manager would be ideal.  I'll ponder this some more....

Again, many thanks for the help.

Chris
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