Re: EXTENSION frame

Willy Tarreau <w@1wt.eu> Thu, 25 January 2018 04:09 UTC

Return-Path: <w@1wt.eu>
X-Original-To: quic@ietfa.amsl.com
Delivered-To: quic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4A62212E042 for <quic@ietfa.amsl.com>; Wed, 24 Jan 2018 20:09:23 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.901
X-Spam-Level:
X-Spam-Status: No, score=-1.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5t7Jy5gbIysB for <quic@ietfa.amsl.com>; Wed, 24 Jan 2018 20:09:21 -0800 (PST)
Received: from 1wt.eu (wtarreau.pck.nerim.net [62.212.114.60]) by ietfa.amsl.com (Postfix) with ESMTP id 1AEC612D893 for <quic@ietf.org>; Wed, 24 Jan 2018 20:09:20 -0800 (PST)
Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id w0P49ES3022287; Thu, 25 Jan 2018 05:09:14 +0100
Date: Thu, 25 Jan 2018 05:09:14 +0100
From: Willy Tarreau <w@1wt.eu>
To: Martin Thomson <martin.thomson@gmail.com>
Cc: Victor Vasiliev <vasilvv@google.com>, QUIC WG <quic@ietf.org>
Subject: Re: EXTENSION frame
Message-ID: <20180125040914.GB22267@1wt.eu>
References: <CABkgnnWxGu3z6DG1cE4MmMwvcZQrJ3QQ3j7k=R_77_1PYUjHmg@mail.gmail.com> <CAAZdMad6Suk_LTxHzbFKG_h2Rbna0LuGVuUf2AnD1KoYb3_x6A@mail.gmail.com> <CABkgnnUkW==kUqM07RoBijir+RoW2OJVoPOBFpwAKjMM5vpSuA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <CABkgnnUkW==kUqM07RoBijir+RoW2OJVoPOBFpwAKjMM5vpSuA@mail.gmail.com>
User-Agent: Mutt/1.6.1 (2016-04-27)
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic/Bk7rbUlpibTWaUrS6CHL6DdeHkQ>
X-BeenThere: quic@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Main mailing list of the IETF QUIC working group <quic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic>, <mailto:quic-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic/>
List-Post: <mailto:quic@ietf.org>
List-Help: <mailto:quic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic>, <mailto:quic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 25 Jan 2018 04:09:23 -0000

On Thu, Jan 25, 2018 at 03:02:38PM +1100, Martin Thomson wrote:
> Creating reasons to tear down connections doesn't seem like a goal.
> 
> If you are concerned about the need to send things that the other side
> doesn't support, then by all means negotiate the use of an extension
> before sending it.  This only makes it *possible* to send something
> without first negotiating support.

Indeed, that's exactly what TCP does and the level of interoperability
is extremely good, without requiring to break connections and try again.

Willy