Re: [quicwg/base-drafts] Padding overhead in DNS over QUIC scenarios (#3523)

Christian Huitema <> Thu, 19 March 2020 18:30 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 682533A0CD2 for <>; Thu, 19 Mar 2020 11:30:01 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -2.008
X-Spam-Status: No, score=-2.008 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, DKIM_VALID_EF=-0.1, HTML_IMAGE_ONLY_16=1.092, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (1024-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id ouNLstYmxuBv for <>; Thu, 19 Mar 2020 11:30:00 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id D93163A0CCB for <>; Thu, 19 Mar 2020 11:29:59 -0700 (PDT)
Date: Thu, 19 Mar 2020 11:29:59 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=pf2014; t=1584642599; bh=fMe/7s1a9WWtCw9HxJvcttrl2eRzu+DmN2+7j7fnOdM=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=sr2jXYhIztfqdRnLwz8vadjEMwZOKYijiSh2LHoI6CEdbnwKsmQc0gyaZXaVmotEl IdAbo+k/TmHu+u3OMOxhUah9w9PlrcWyFofLaFzecucZdef4x8Jgha2DU3c+etcaDf hTTmd+E5Hc/tnv14bS2LeKTq4B/hdBFpo7aDr8p4=
From: Christian Huitema <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/issues/3523/>
In-Reply-To: <quicwg/base-drafts/issues/>
References: <quicwg/base-drafts/issues/>
Subject: Re: [quicwg/base-drafts] Padding overhead in DNS over QUIC scenarios (#3523)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5e73ba27bd6f_73d63ff8c02cd960118647"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: huitema
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
Archived-At: <>
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Thu, 19 Mar 2020 18:30:02 -0000

Yes, DNS over QUIC uses its own ALPN.  The draft specifies "doq". (The "sticking out" issue is hopefully solved with ESNI/ECHO.) But in the QUIC stack, the test for Initial packet length is performed before parsing the content of the Client Hello. Short Initial packets are just discarded before processing.

You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub: