Re: max_ack_delay for handshake

Martin Duke <martin.h.duke@gmail.com> Tue, 09 July 2019 17:00 UTC

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From: Martin Duke <martin.h.duke@gmail.com>
Date: Tue, 09 Jul 2019 10:00:18 -0700
Message-ID: <CAM4esxQgzYaZp_MosB94kHEK_Tx4FO1bo1ykbP=KXimVnAwBVA@mail.gmail.com>
Subject: Re: max_ack_delay for handshake
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Ah, I see now that Section 5.3 makes it clear that we must use a value of
zero. Never mind!

On Tue, Jul 9, 2019 at 9:59 AM Martin Duke <martin.h.duke@gmail.com> wrote:

> New to section 4.4 of quic-recovery;
>
> *For Initial and Handshake packets, a
>    max_ack_delay of 0 is used.*
>
>
> I see two possible meanings of this:
> 1) endpoints MUST not intentionally delay acks of Initial and Handshake
> packets;
> 2) In RTT calculation, endpoints should assume a peer max_ack_delay of
> zero.
>
> (2) is a little hairy because there is one RTT estimate, not a per-context
> one. But what is the intent here?
>