IETF Logo Mail Archive

Re: [quicwg/base-drafts] loss of only two packets can lead to an unrecoverable situation (#2267)

Marten Seemann <notifications@github.com> Mon, 28 January 2019 04:41 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 87F2B130FA0 for <quic-issues@ietfa.amsl.com>; Sun, 27 Jan 2019 20:41:56 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -11.149
X-Spam-Level:
X-Spam-Status: No, score=-11.149 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-4.553, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_28=1.404, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, 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 p6pLJ7layCmx for <quic-issues@ietfa.amsl.com>; Sun, 27 Jan 2019 20:41:55 -0800 (PST)
Received: from out-7.smtp.github.com (out-7.smtp.github.com [192.30.252.198]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0FF03130F8B for <quic-issues@ietf.org>; Sun, 27 Jan 2019 20:41:55 -0800 (PST)
Date: Sun, 27 Jan 2019 20:41:54 -0800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1548650514; bh=v+XAz4mx6tShV03MUGWNk4P1WLFAGwluWIVJe/+v4jk=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=Q/syrUhHj4DcJBDU5rgpsoNo72e1C19i3lby7kpFHERBAq0pT5Ed/siq1uCHHjrpP j0PSNMcUrE/QrPnhFQeHZr463xBLI0MFF9UlNDbfvt0v9R9PbF52Gc5DtYZwPybPFF O6pPnoMl9f7W5bHS8/RLzY5ur3CZ8dCRqTFPg9VA=
From: Marten Seemann <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+0166e4aba9247feafe90dca6b352cffba30c2dfaf596f95892cf0000000118664a1292a169ce1784eaec@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/2267/457997260@github.com>
In-Reply-To: <quicwg/base-drafts/issues/2267@github.com>
References: <quicwg/base-drafts/issues/2267@github.com>
Subject: Re: [quicwg/base-drafts] loss of only two packets can lead to an unrecoverable situation (#2267)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5c4e88123a1b1_d743fd1ed0d45b8971336"; 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/87p8oIpXCRrWK93JvK_4Vhh-YRk>
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: Mon, 28 Jan 2019 04:41:56 -0000

The issue is that the ACK for the CFIN is lost.

I think the cleanest solution here is making the server send a HANDSHAKE_DONE frame in 1-RTT once the handshake is complete. At this point, it can immediately drop the Handshake keys. The HANDSHAKE_DONE is retransmitted according to normal 1-RTT retransmission rules, and as soon as the client receives it, it also drops Handshake keys and switches loss recovery to 1-RTT mode.


-- 
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/2267#issuecomment-457997260

v2.43.4 | Report a Bug | By Email | System Status