Re: [tcpm] another review of draft-ietf-tcpm-tcpsecure[-10]

"Anantha Ramaiah (ananth)" <ananth@cisco.com> Mon, 29 September 2008 16:14 UTC

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Thread-Topic: [tcpm] another review of draft-ietf-tcpm-tcpsecure[-10]
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From: "Anantha Ramaiah (ananth)" <ananth@cisco.com>
To: "Lars Eggert" <lars.eggert@nokia.com>
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Cc: tcpm@ietf.org, =?iso-8859-1?Q?Alfred_H=CEnes?= <ah@tr-sys.de>, "Mitesh Dalal \(mdalal\)" <mdalal@cisco.com>, rrs@cisco.com
Subject: Re: [tcpm] another review of draft-ietf-tcpm-tcpsecure[-10]
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Lars,

Confused here. The TCP timestamps, SACK etc., are NOT specified in RFC 793. Hence they don't update RFC 793 in any sense, these are independent.

Now, RFC 2001 is a separate RFC by itself which was obsoleted by RFC 2581. Yes, this is pretty close since this talks about congestion control which is central to TCP, so may be it updates some sections of RFC 793, I haven't taken a close look.

Tcpsecure on the other hand does update the processing rules of 793 ( pl see sections 3.2, 4.2, and 5.2), and hence Alfred's point makes sense to me. 
FWIW, I never thought about this until Alfred brought this point up, IMO, this is a good point.

-Anantha

-----Original Message-----
From: Lars Eggert [mailto:lars.eggert@nokia.com] 
Sent: Monday, September 29, 2008 8:26 AM
To: Anantha Ramaiah (ananth)
Cc: Alfred HÎnes; rrs@cisco.com; Mitesh Dalal (mdalal); tcpm@ietf.org
Subject: Re: [tcpm] another review of draft-ietf-tcpm-tcpsecure[-10]

Hi,

(individual hat on)

On 2008-9-29, at 0:08, ext Anantha Ramaiah (ananth) wrote:
> In particular, regarding your observation of mentioning what the 
> document is doing, I agree that we should mention that it "updates 
> 793". I am hoping that nobody has any objection to this point.

since this document specifies an optional component to TCP, I'd argue that it should not update RFC793. If you look at the RFC Editor page, almost no other RFC updates RFC793, because even widely-deployed extensions (timestamps, SACK, etc.) are all optional. Even RFC2581 doesn't update RFC793.

Lars
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