Re: [quicwg/base-drafts] Handling of corrupt Retry packets (#3014)

ianswett <notifications@github.com> Tue, 10 September 2019 15:10 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 8A3981208A2 for <quic-issues@ietfa.amsl.com>; Tue, 10 Sep 2019 08:10:13 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.454
X-Spam-Level:
X-Spam-Status: No, score=-6.454 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_20=1.546, 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 f3ur9ZRtax-Z for <quic-issues@ietfa.amsl.com>; Tue, 10 Sep 2019 08:10:10 -0700 (PDT)
Received: from out-23.smtp.github.com (out-23.smtp.github.com [192.30.252.206]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7B9631208BD for <quic-issues@ietf.org>; Tue, 10 Sep 2019 08:10:10 -0700 (PDT)
Date: Tue, 10 Sep 2019 08:10:09 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1568128209; bh=VLwx8IdhGnRyl1rRZraEQ8QE/zTbQIWaiZfLh+G3eIM=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=r3vUoTRVBu0B3h69orr/b7k16YvX2AOnjaCGkxp/QjJh8TwHymGpBkvaxQHlAbl3m UallzVxtXZXJ2KaAahCADs8RRRTLszX1Nd1ByzRThOSVYfYR77YsJQWjQ8K84sES+g aeJawHkgtPhFr6AxScQwaGNsyhXrVj3cpQ8HPe2E=
From: ianswett <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK4FVPZ4X2MTIAXAPCN3QT6WDEVBNHHB2TYBKQ@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/3014/529982122@github.com>
In-Reply-To: <quicwg/base-drafts/issues/3014@github.com>
References: <quicwg/base-drafts/issues/3014@github.com>
Subject: Re: [quicwg/base-drafts] Handling of corrupt Retry packets (#3014)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5d77bcd1a783c_74223fb9806cd96825617d"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: ianswett
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/R_c9HF4bO8u1rI9l-AP2U9Dqt4k>
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, 10 Sep 2019 15:10:14 -0000

I think it's reasonable to recommend using UDP checksums, particularly for unprotected packets such as Retry and VN.

I hadn't thought through the implications of a corrupted Retry token to realize it makes the handshake unrecoverable.  I'm not sure I want to fix that issue now, but I think it's worth documenting.

-- 
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/3014#issuecomment-529982122