netdev - Re: The mystery of optimistic ipv6 DAD handling

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Message-ID: <20111229000044.GA7513@hmsreliant.think-freely.org>
Date:	Wed, 28 Dec 2011 19:00:44 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: The mystery of optimistic ipv6 DAD handling

On Wed, Dec 28, 2011 at 02:38:12PM -0500, David Miller wrote:
> From: Neil Horman <nhorman@...driver.com>
> Date: Wed, 28 Dec 2011 14:21:50 -0500
> 
> > Clearly I misread the RFC the first time through and the test as it existed is
> > incorrect.  I'm wondering though if what we need is a way to lookup if we've
> > received a RA on the interface, and check to see if it has a source link layer
> > option attached to it.
> 
> Yes, we could implement this with a new neigh lookup routine, that allows
> keying on device pointer and flags.
> 
> So in this case we'd pass the device and NTF_ROUTER.  If the lookup returns
> non-NULL then we've seen an RA with SLLAO specified.
> 

Agreed.  If its ok with you I'll start working on that in a few days, once we
get through the holidays here.  

Happy New Year!
Best
Neil
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