From nobody Thu Mar 19 11:30:04 2020 Return-Path: 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 682533A0CD2 for ; Thu, 19 Mar 2020 11:30:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.008 X-Spam-Level: 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: 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 ouNLstYmxuBv for ; Thu, 19 Mar 2020 11:30:00 -0700 (PDT) Received: from out-22.smtp.github.com (out-22.smtp.github.com [192.30.252.205]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (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; d=github.com; 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: In-Reply-To: References: 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 X-GitHub-Recipient-Address: quic-issues@ietf.org Archived-At: X-BeenThere: quic-issues@ietf.org 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 ----==_mimepart_5e73ba27bd6f_73d63ff8c02cd960118647 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 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: https://github.com/quicwg/base-drafts/issues/3523#issuecomment-601343746 ----==_mimepart_5e73ba27bd6f_73d63ff8c02cd960118647 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

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.

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