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

Marten Seemann <notifications@github.com> Tue, 14 January 2020 01:57 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 CAFEC120091 for <quic-issues@ietfa.amsl.com>; Mon, 13 Jan 2020 17:57:18 -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 8rl_xxoYVAr2 for <quic-issues@ietfa.amsl.com>; Mon, 13 Jan 2020 17:57:17 -0800 (PST)
Received: from out-17.smtp.github.com (out-17.smtp.github.com [192.30.252.200]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0310E12001B for <quic-issues@ietf.org>; Mon, 13 Jan 2020 17:57:17 -0800 (PST)
Date: Mon, 13 Jan 2020 17:57:16 -0800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1578967036; bh=ft5jhWfcGO0FdhtfhXPQMw7jZNdqWzrzyi1n2r2M1Cg=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=z8TeKxz1DwulaJgCei7zeVxgU21s7/0Ncj8ZvtIPoJpJmTn72vPp+H+R7IJP5aCKi k/GrNpSBaOBycglB3abU4xV8MyH8XfEQsEod1mBWi1rWEECKiuIaASwsMfloCV6gR5 78FdiRtkgwhPqW+nI7t9ECKYtqxtmOKJAjB+ZZME=
From: Marten Seemann <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK4EF7P4WRNQZ657YPF4FJJHZEVBNHHCBMO65M@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/3333/573961938@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_5e1d1ffc17313_7cf13fc253ccd96893762"; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: marten-seemann
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/dINuCoA5KReO7bne7TjGPxQi9z8>
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: Tue, 14 Jan 2020 01:57:19 -0000

> Because bytes outside of QUIC packet are most likely unprocessable, it is not counted to the data size that server has received. That means that server might get choked during handshake with packet losses.

@tatsuhiro-t raises an interesting point here. While it's certainly not impossible to use the size of the UDP datagram for the amplification limit, this would be quite hard to do in my implementation. Undecryptable packets are discarded way down in the stack, and passing up that information to the congestion controller would require quite a bit of extra work.

-- 
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-573961938