netdev - Re: [PATCH net-next] ipv6: mld: answer mldv2 queries with mldv1 reports in mldv1 fallback

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Message-Id: <1411220173.3064805.169748713.764DF711@webmail.messagingengine.com>
Date:	Sat, 20 Sep 2014 15:36:13 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Daniel Borkmann <dborkman@...hat.com>, davem@...emloft.net
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] ipv6: mld: answer mldv2 queries with mldv1 reports
 in mldv1 fallback

On Sat, Sep 20, 2014, at 14:03, Daniel Borkmann wrote:
> Since the mapping of MRC to MRD in exactly such cases can make use of
> the exponential algorithm from 5.1.3, we cannot [strictly speaking] be
> aware in MLDv1 of the encoding in MRC, it seems also not mentioned by
> the RFC. Since encodings are the same up to 32767, assume in such a
> situation this value as a hard upper limit we would clamp. We have asked
> one of the RFC authors on that regard, and he mentioned that there seem
> not to be any implementations that make use of that exponential algorithm
> on startup messages. In any case, this patch fixes this MLD
> interoperability issue.
> 
> Signed-off-by: Daniel Borkmann <dborkman@...hat.com>

Acked-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
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