Re: [tcpm] SYN/ACK Payloads, draft 01

"Adam Langley" <agl@imperialviolet.org> Thu, 14 August 2008 23:35 UTC

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Date: Thu, 14 Aug 2008 16:35:47 -0700
From: "Adam Langley" <agl@imperialviolet.org>
To: "Caitlin Bestler" <Caitlin.Bestler@neterion.com>
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Cc: tcpm@ietf.org, Joe Touch <touch@isi.edu>
Subject: Re: [tcpm] SYN/ACK Payloads, draft 01
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On Thu, Aug 14, 2008 at 3:44 PM, Caitlin Bestler
<Caitlin.Bestler@neterion.com> wrote:
> So there *is* rationale for doing this at the transport layer. Whether
> there is *sufficient* rationale is subject to debate. My key reservation
> remains that this breaks a fundamental concept of TCP. Instead of the
> TCP payload being "a stream of bytes" it is now "an optional banner
> message sent only when the peer's TCP options indicate it can be
> parsed followed by a stream of bytes".

Just to correct one point - the banners are still seen as part of the
stream of bytes by both ends. The option communicates a single bit,
out of band, to both ends. I think that's the problem.

So it looks like the concenous for this is pretty thin.

(Un)fortunately, I'm persistant as hell, so I shall consider what
other avenues I have. I still firmly believe that a world with
opportunistic encryption would be a better world than we have now.

Cheers all,


AGL

-- 
Adam Langley agl@imperialviolet.org http://www.imperialviolet.org
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