Re: [quicwg/base-drafts] Required state for retaining unacked RETIRE_CONNECTION_ID frames is unbound (#3509)

Kazuho Oku <> Tue, 24 March 2020 02:31 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 6C1143A0F98 for <>; Mon, 23 Mar 2020 19:31:54 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -3.098
X-Spam-Status: No, score=-3.098 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_32=0.001, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=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 51HTsp2vk2kl for <>; Mon, 23 Mar 2020 19:31:52 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 035833A0F95 for <>; Mon, 23 Mar 2020 19:31:49 -0700 (PDT)
Date: Mon, 23 Mar 2020 19:31:48 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=pf2014; t=1585017108; bh=qwE1tNNGXfMzRzbm7folshj1aRd5vrRGw2pCzN//OpU=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=KyNttzJUf6mnKK0f0d2cqRUxjLbE4pOf9tRNMo5zQL1NBIOxhwru44FZ2kTRLVyQW W5iQjJl/kVGewaoh7vjE5zIuG/q+CosQGvws228ScZjD3VZVrO0YwcuB4PYn/nGcJE RGtT+2GkYwZGHLKOKwB0Cm1YVwlrvxZzWAG12yvM=
From: Kazuho Oku <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/issues/3509/>
In-Reply-To: <quicwg/base-drafts/issues/>
References: <quicwg/base-drafts/issues/>
Subject: Re: [quicwg/base-drafts] Required state for retaining unacked RETIRE_CONNECTION_ID frames is unbound (#3509)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5e797114d5ce6_4533fb5574cd960105679"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: kazuho
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, 24 Mar 2020 02:31:55 -0000

@MikeBishop I think your summarization of the problem is accurate.

Regarding an attacker selectively acking packets carrying STREAM frames, yes, the attack exists, but it the sender can mitigate that problem in certain ways. We already state that in [section 21.5](

This issue is the only case that a protocol cannot be implemented properly, with a bounded amount of state.

Regarding how we should fix the problem, _if_ we are going make a protocol change, my preference goes to applying the same design principle that we have in other places (i.e. introduce MAX_CONNECTIONS_IDS frame). I do not like designing a mechanism specific for this purpose, as there is a chance that we might make mistakes.

I can also live with what @martinthomson proposed in (i.e. encourage leaky behavior).

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