Re: [quicwg/base-drafts] Invariant independent (#3684)

Jana Iyengar <> Tue, 26 May 2020 23:06 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 28C603A0B82 for <>; Tue, 26 May 2020 16:06:49 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -1.483
X-Spam-Status: No, score=-1.483 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_24=1.618, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_MSPIKE_H2=-0.001, 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 sVuQUpiEs5pq for <>; Tue, 26 May 2020 16:06:48 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id F3B6B3A0B81 for <>; Tue, 26 May 2020 16:06:47 -0700 (PDT)
Received: from ( []) by (Postfix) with ESMTP id 580E0280365 for <>; Tue, 26 May 2020 16:06:47 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=pf2014; t=1590534407; bh=BE4SEs8553kvLPHlKUtufeTndNmMqg+Nt4VwzP8RPzU=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=oJFJ+E3V8TkKdFtpGHypgQ6kCwM9bXjzt2fEgpmMb15aXERq9XFnXLD4+dYCC6btM YX5HulBU/HclrcYKDdMc5l5STAkme0XwaGnq+pxqUvjWh4ONCeT683aRAZbEw7t9z+ j6OTvQlYsIMe97mLJS/3oZSmYhlerC0kv+qj4leE=
Date: Tue, 26 May 2020 16:06:47 -0700
From: Jana Iyengar <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/pull/3684/review/>
In-Reply-To: <quicwg/base-drafts/pull/>
References: <quicwg/base-drafts/pull/>
Subject: Re: [quicwg/base-drafts] Invariant independent (#3684)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5ecda10748d8c_cbd3fe81f2cd96c2515a"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: janaiyengar
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: Tue, 26 May 2020 23:06:49 -0000

@janaiyengar commented on this pull request.

>  # QUIC Packet Headers
-A QUIC packet is the content of the UDP datagrams exchanged by QUIC endpoints.
-This document describes the contents of those datagrams.
+QUIC endpoints exchange UDP datagrams that contain one or more QUIC packets.
+This section describes the invariant characteristics of a QUIC packet.  A
+version of QUIC could permit multiple QUIC packets in a single UDP datagram, but
+the invariant properties only describe the first packet in a datagram.

I'll take back my suggestion that this should be a design issue. I agree that this new text is consistent with what is possible. (To answer myself, a new version of QUIC could just as well define coalescing as using "sub packets" with other headers, so there's no way to require a header format for a second packet in a coalesced datagram.)

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