netdev - Re: [PATCH] ipv6: addrconf: clear IPv6 addresses and routes when losing link

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Message-Id: <20101026.104710.232747902.davem@davemloft.net>
Date:	Tue, 26 Oct 2010 10:47:10 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	lorenzo@...gle.com
Cc:	brian.haley@...com, shemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: [PATCH] ipv6: addrconf: clear IPv6 addresses and routes when
 losing link

From: Lorenzo Colitti <lorenzo@...gle.com>
Date: Tue, 26 Oct 2010 10:37:53 -0700

> So when the link comes back, we'd have to wait for all RAs to come in
> (there could be multiple routers on a link, each announcing different
> prefixes), and when this is all done, compare the list of addresses to
> the prefixes that are currently on the link and delete the ones that
> don't match. We'd have to do the same with default routers and /64
> routes to all the link prefixes.

Why would you do this when there are link layer indications that
we are attached to a different network?

The only thing missing is a new device notification type, some code to
generate it in the wireless subsystem, and an ipv6 handler to zap the
addresses when received.

Please think out of the box for a second, thanks :-)
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