netdev - Re: TCP-MD5 checksum failure on x86

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Message-Id: <70125082-4A0B-4E54-A7F6-B6CDC0375E78@nokia.com>
Date:	Fri, 7 May 2010 11:46:40 +0300
From:	Lars Eggert <lars.eggert@...ia.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Bhaskar Dutta <bhaskie@...il.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: TCP-MD5 checksum failure on x86_64 SMP

On 2010-5-6, at 15:06, Eric Dumazet wrote:
> This code should be completely rewritten for linux-2.6.35, its very ugly
> and over complex, yet it is not scalable.

Let me quickly point out that the IETF has recently replaced TCP-MD5 with TCP-AO (http://tools.ietf.org/html/draft-ietf-tcpm-tcp-auth-opt-11) which is days or weeks away from being published as an RFC. (The draft has been approved and it waiting for the RFC Editor to finish the final copy-editing.)

You'll obviously still want TCP-MD5 support for talking to existing equipment, but significant cycles would IMO be better spent on TCP-AO.

Lars
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