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Re: Go Back to Single Packet Number Space

Tommy Pauly <tpauly@apple.com> Thu, 26 July 2018 04:26 UTC

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Subject: Re: Go Back to Single Packet Number Space
From: Tommy Pauly <tpauly@apple.com>
In-reply-to: <20180726030135.GA19322@ubuntu-dmitri>
Date: Wed, 25 Jul 2018 21:26:49 -0700
Cc: Martin Thomson <martin.thomson@gmail.com>, Nick Banks <nibanks=40microsoft.com@dmarc.ietf.org>, QUIC WG <quic@ietf.org>
Message-id: <E2CFE327-4F6B-4217-B248-CE049764187A@apple.com>
References: <DM5PR2101MB09016D44959E5796570F3CB7B3540@DM5PR2101MB0901.namprd21.prod.outlook.com> <CABkgnnUTPvrVALX0Xr9xGpJnTHq=yWN48NRqtcQSZ4bzGFjAYA@mail.gmail.com> <20180726030135.GA19322@ubuntu-dmitri>
To: Dmitri Tikhonov <dtikhonov@litespeedtech.com>
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As another implementer, I also prefer having the split packet spaces. The point isn't necessarily that it's good to have the triple spaces, but rather that it's nice to have the packet number spaces correspond tightly with the packet types and protection. The logic for handling a space can be treated more uniformly in that way, although it does involve potentially more memory to store the state.

Thanks,
Tommy

> On Jul 25, 2018, at 8:01 PM, Dmitri Tikhonov <dtikhonov@litespeedtech.com> wrote:
> 
> On Thu, Jul 26, 2018 at 11:41:48AM +1000, Martin Thomson wrote:
>> The feedback I've heard is that the simplification is subjective.
>> Others have said that a single space would complicate their
>> implementation considerably more.
> 
> EKR is one of the "others" [1] -- are there other implementers who
> prefer the triple packet space?
> 
>  - Dmitri.
> 
> 1. https://github.com/quicwg/base-drafts/issues/1579#issuecomment-405720217
>

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