Re: [quicwg/base-drafts] Padding outside QUIC packet (#3333)

Andy Grover <notifications@github.com> Fri, 17 January 2020 06:53 UTC

Return-Path: <noreply@github.com>
X-Original-To: quic-issues@ietfa.amsl.com
Delivered-To: quic-issues@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AF0D2120236 for <quic-issues@ietfa.amsl.com>; Thu, 16 Jan 2020 22:53:17 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.382
X-Spam-Level:
X-Spam-Status: No, score=-6.382 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_24=1.618, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=github.com
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 09eyBw5c0JAv for <quic-issues@ietfa.amsl.com>; Thu, 16 Jan 2020 22:53:13 -0800 (PST)
Received: from out-19.smtp.github.com (out-19.smtp.github.com [192.30.252.202]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9BEB1120046 for <quic-issues@ietf.org>; Thu, 16 Jan 2020 22:53:13 -0800 (PST)
Date: Thu, 16 Jan 2020 22:53:12 -0800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1579243992; bh=pbLc8L/JIfUkqbpO+vd+3NtFyYEORhs4W0MlKpXGBXs=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=J0Drly4k62XOvud4PlyelT5fGHCNuiRqLchOkBJeZnKHEsD3d5wxxwZmPy/8QHnFp WLJk4GSauq4D82YnPJQKtMLEySqaxJworp/EKYiyqDoOKeV4jcbz7gSzvRuWP4LHB/ 3R1uuP0NbmEPTwT+qz7EURap3/ZR4PhZUOWXmbIs=
From: Andy Grover <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK626WKKFXVBCTISESV4F2GFREVBNHHCBMO65M@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/3333/575499163@github.com>
In-Reply-To: <quicwg/base-drafts/issues/3333@github.com>
References: <quicwg/base-drafts/issues/3333@github.com>
Subject: Re: [quicwg/base-drafts] Padding outside QUIC packet (#3333)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5e2159d837615_3ab23fb37cccd96c12052e"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: agrover
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-GitHub-Recipient-Address: quic-issues@ietf.org
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic-issues/54R0J7yNA0sSMOhQXQMz_rXpGO0>
X-BeenThere: quic-issues@ietf.org
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <quic-issues.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic-issues/>
List-Post: <mailto:quic-issues@ietf.org>
List-Help: <mailto:quic-issues-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Jan 2020 06:53:18 -0000

> I am afraid that the specification would become needlessly complex, if we are to suggest that padding outside of QUIC packet is a possibility.

Many other implementations didn't initially work against Neqo (which pads outside) and the Wireshark QUIC dissector does not currently handle it either. If the spec doesn't say anything then future implementations are bound to incorrectly handle outside padding. People are bound to assume it is not allowed if the spec says nothing, or just not consider the possibility of it.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/quicwg/base-drafts/issues/3333#issuecomment-575499163