Re: [tcpm] Definition of SMSS/RMSS in RFC5681 are inaccurate?!

Alexander Zimmermann <alexander.zimmermann@nets.rwth-aachen.de> Mon, 26 July 2010 15:55 UTC

Return-Path: <alexander.zimmermann@nets.rwth-aachen.de>
X-Original-To: tcpm@core3.amsl.com
Delivered-To: tcpm@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 273A53A6880 for <tcpm@core3.amsl.com>; Mon, 26 Jul 2010 08:55:15 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.411
X-Spam-Level:
X-Spam-Status: No, score=-3.411 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HELO_EQ_DE=0.35, HELO_MISMATCH_DE=1.448, PLING_QUERY=1.39, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vcepkHGeoVNQ for <tcpm@core3.amsl.com>; Mon, 26 Jul 2010 08:55:14 -0700 (PDT)
Received: from mta-2.ms.rz.rwth-aachen.de (mta-2.ms.rz.RWTH-Aachen.DE [134.130.7.73]) by core3.amsl.com (Postfix) with ESMTP id 015863A67DA for <tcpm@ietf.org>; Mon, 26 Jul 2010 08:55:14 -0700 (PDT)
MIME-version: 1.0
Received: from ironport-out-1.rz.rwth-aachen.de ([134.130.5.40]) by mta-2.ms.rz.RWTH-Aachen.de (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008)) with ESMTP id <0L6600GFD9KMWF40@mta-2.ms.rz.RWTH-Aachen.de> for tcpm@ietf.org; Mon, 26 Jul 2010 17:55:34 +0200 (CEST)
X-IronPort-AV: E=Sophos; i="4.55,261,1278280800"; d="sig'?scan'208"; a="66639616"
Received: from relay-auth-1.ms.rz.rwth-aachen.de (HELO relay-auth-1) ([134.130.7.78]) by ironport-in-1.rz.rwth-aachen.de with ESMTP; Mon, 26 Jul 2010 17:55:33 +0200
Received: from [192.168.4.13] ([unknown] [77.109.116.197]) by relay-auth-1.ms.rz.rwth-aachen.de (Sun Java(tm) System Messaging Server 7.0-3.01 64bit (built Dec 9 2008)) with ESMTPA id <0L6600GZV9KLBS00@relay-auth-1.ms.rz.rwth-aachen.de> for tcpm@ietf.org; Mon, 26 Jul 2010 17:55:34 +0200 (CEST)
Content-type: multipart/signed; protocol="application/pgp-signature"; micalg="pgp-sha1"; boundary="Apple-Mail-2--942659921"
From: Alexander Zimmermann <alexander.zimmermann@nets.rwth-aachen.de>
In-reply-to: <07e7e311cf5541066605d58353cc4681@localhost>
Date: Mon, 26 Jul 2010 17:55:34 +0200
Content-transfer-encoding: 7bit
Message-id: <EEC54358-4B01-42D0-A160-BBD7AE065B4D@nets.rwth-aachen.de>
References: <62315AD7-72BE-42A1-AEFB-E706C54BF50A@nets.rwth-aachen.de> <07e7e311cf5541066605d58353cc4681@localhost>
To: Hagen Paul Pfeifer <hagen@jauu.net>
X-Pgp-Agent: GPGMail 1.2.3
X-Mailer: Apple Mail (2.1081)
Cc: "tcpm@ietf.org Extensions" <tcpm@ietf.org>, David Borman <david.borman@windriver.com>
Subject: Re: [tcpm] Definition of SMSS/RMSS in RFC5681 are inaccurate?!
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/tcpm>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 26 Jul 2010 15:55:15 -0000

Hi Hagen,

Am 26.07.2010 um 17:43 schrieb Hagen Paul Pfeifer:

> 
> On Mon, 26 Jul 2010 14:33:26 +0200, Alexander Zimmermann wrote:
> 
> 
> 
>> The size does not include the TCP/IP headers and options. This is wrong!
> 
>> The options are the TCP/IP headers.
> 
> 
> 
> Strange that nobody spotted this. "The options are the TCP/IP headers",
> 
> what does this mean?

Nothing :-)

I was too quick. Copy & Paste inattention.
I wanted to write: The size does not include the TCP/IP options.

Alex


> draft-ietf-tcpm-tcpmss-03 should be mentioned instead:
> 
> 
> 
>   The MSS value to be sent in an MSS option should be equal to the
> 
>   effective MTU minus the fixed IP and TCP headers.
> 
> 
> 
> 
> 
> Hagen