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 CAF12120122 for ; Wed, 16 Oct 2019 14:10:23 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.596 X-Spam-Level: X-Spam-Status: No, score=-6.596 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_28=1.404, 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 3KzHAP3WQJnr for ; Wed, 16 Oct 2019 14:10:22 -0700 (PDT) Received: from out-6.smtp.github.com (out-6.smtp.github.com [192.30.252.197]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0303712007C for ; Wed, 16 Oct 2019 14:10:22 -0700 (PDT) Received: from github-lowworker-c5134a3.ac4-iad.github.net (github-lowworker-c5134a3.ac4-iad.github.net [10.52.23.55]) by smtp.github.com (Postfix) with ESMTP id D175B1C0730 for ; Wed, 16 Oct 2019 14:10:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1571260220; bh=LNYzQhHXc+PxidX60FxVW08H5vZsqaslnfspi+jqlC8=; h=Date:From:Reply-To:To:Cc:Subject:List-ID:List-Archive:List-Post: List-Unsubscribe:From; b=CsqP+FpkAntTogWHI09qIt4KR7A360XwThehLA6PP+XmUT02f0JScAqaB+X+ETjtK L7LHuubCipqthwGrrSQabA8TYonA77NKF1BNDhX5pevqwhbm579lwE2RT11Ks4AK3z n0DGgfD7yB6bVtqr/jBdh401RGwiD0ONM/C/FpAg= Date: Wed, 16 Oct 2019 14:10:20 -0700 From: martinduke Reply-To: quicwg/base-drafts To: quicwg/base-drafts Cc: Subscribed Message-ID: Subject: [quicwg/base-drafts] ACK+PADDING in response to ACK should be illegal (#3100) Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="--==_mimepart_5da7873cc2500_687f3fdd60ccd96821408f"; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: list X-GitHub-Sender: martinduke 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: Wed, 16 Oct 2019 21:10:24 -0000 ----==_mimepart_5da7873cc2500_687f3fdd60ccd96821408f Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit quic-transport draft 13.2.1: An endpoint MUST NOT send a packet containing only an ACK frame in response to a non-ACK-eliciting packet (one containing only ACK and/or PADDING frames), @marten-seemann points out that this allows one to send an ACK+PADDING packet, which seems to violate the spirit of the rule. This loophole breaks #3093. I believe this may be Editorial if we all know what we meant. -- 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/3100 ----==_mimepart_5da7873cc2500_687f3fdd60ccd96821408f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

quic-transport draft 13.2.1:

An endpoint MUST NOT send a packet containing
only an ACK frame in response to a non-ACK-eliciting packet (one
containing only ACK and/or PADDING frames),

@marten-seemann points out that this allows one to send an ACK+PADDING packet, which seems to violate the spirit of the rule. This loophole breaks #3093. I believe this may be Editorial if we all know what we meant.

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