[quicwg/base-drafts] More detail regarding dropping of ACK Ranges (#3581)

Martin Thomson <notifications@github.com> Wed, 15 April 2020 01:35 UTC

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Date: Tue, 14 Apr 2020 18:35:48 -0700
From: Martin Thomson <notifications@github.com>
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Subject: [quicwg/base-drafts] More detail regarding dropping of ACK Ranges (#3581)
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This explains what needs to be kept and why.  Specifically, you need to
keep ranges unless you have other means of ensuring that you don&#39;t
accept packets from those ranges again.  You also need to keep the
largest acknowledged so that you can get a packet number from subsequent
packets.

This also recommends that ACK frames include the largest acknowledged
always.  That is primarily to ensure that ECN works properly, and even
there, you only disable ECN if you get some weird reordering, so it&#39;s
probably not a big deal if you don&#39;t follow this recommendation.

The issue is marked design, but the resolution here is basically a restatement of other text.  I think we can run this through the design process, but it isn&#39;t really worth flagging this in a change log in my opinion.

Closes #3541.
Closes #3537.
You can view, comment on, or merge this pull request online at:

  https://github.com/quicwg/base-drafts/pull/3581

-- Commit Summary --

  * More detail regarding dropping of ACK Ranges

-- File Changes --

    M draft-ietf-quic-transport.md (17)

-- Patch Links --

https://github.com/quicwg/base-drafts/pull/3581.patch
https://github.com/quicwg/base-drafts/pull/3581.diff

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