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Re: draft-30 non-implementable, please

Christian Huitema <huitema@huitema.net> Tue, 11 August 2020 18:25 UTC

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Subject: Re: draft-30 non-implementable, please
To: Ian Swett <ianswett=40google.com@dmarc.ietf.org>, Martin Duke <martin.h.duke@gmail.com>
Cc: IETF QUIC WG <quic@ietf.org>, Ryan Hamilton <ryan@optimism.cc>, Lucas Pardue <lucaspardue.24.7@gmail.com>
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From: Christian Huitema <huitema@huitema.net>
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Date: Tue, 11 Aug 2020 11:24:41 -0700
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If that's true, then supporting draft-30 in picoquic in addition to
draft 29 is just a one-line change. Good way to test version aliasing.

On 8/11/2020 11:13 AM, Ian Swett wrote:
> I'm not aware of anything that I expect to cause interop problems, but
> the other editors may have something in mind.  In particular, there
> are no wire format changes or new mechanisms that if you don't
> implement, the connection fails.
>
> I was thinking we would roll the changes into the existing -29, rather
> than shipping -30 as an ALPN and Alt-Svc.
>
> On Tue, Aug 11, 2020 at 2:04 PM Martin Duke <martin.h.duke@gmail.com
> <mailto:martin.h.duke@gmail.com>> wrote:
>
>     I am happy to defer to the editors as to whether their change
>     requires interoperability changes or not. My quick scan of the
>     diff doesn't immediately reveal anything that would actually cause
>     an issue, but I might be wrong.
>
>     On Tue, Aug 11, 2020 at 10:55 AM Lucas Pardue
>     <lucaspardue.24.7@gmail.com <mailto:lucaspardue.24.7@gmail.com>>
>     wrote:
>
>         whoops [1]
>
>         [1] -
>         https://tools.ietf.org/rfcdiff?url1=https://tools.ietf.org/id/draft-ietf-quic-transport&url2=https://quicwg.github.io/base-drafts/draft-ietf-quic-transport.txt
>
>         On Tue, Aug 11, 2020 at 6:54 PM Lucas Pardue
>         <lucaspardue.24.7@gmail.com
>         <mailto:lucaspardue.24.7@gmail.com>> wrote:
>
>
>             On Tue, Aug 11, 2020 at 6:46 PM Ryan Hamilton
>             <ryan@optimism.cc> wrote:
>
>                 Completely agree. If -30 is compatible with -29 let's
>                 keep the same "on the wire" versioning so that we can
>                 maximize the probability of successful communication!
>
>
>             Speaking as an individual, the struggle I have is that 29
>             to 30 is not a no-op. You can look at the current diff for
>             transport [1] and see that we're sarig down the barrel of
>             10 design issues with proposals. So as an endpoint that
>             implements 30-not-30, if I speak to an endpoint that is
>             barely-29 and I have issues, what is my recourse? I really
>             don't want to get into UA sniffing to build in branching
>             code...
>
>             Lucas
>
>

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