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Re: [TLS] Questions about ALPN

Martin Thomson <martin.thomson@gmail.com> Wed, 09 April 2014 16:28 UTC

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Date: Wed, 09 Apr 2014 09:28:38 -0700
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From: Martin Thomson <martin.thomson@gmail.com>
To: Adam Langley <agl@google.com>
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Subject: Re: [TLS] Questions about ALPN
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What Adam said, except...

On 9 April 2014 09:04, Adam Langley <agl@google.com> wrote:
>> - Specify guidelines for when it is appropriate to add a new protocol
>>   to the ALPN registry. (E.g., when it is intended to be used in
>>   NPN negotiation in TLS and DTLS.)
>
> I would hope the expert in the Expert Review would notice a request
> that was so confused that they were applying for an ALPN string when
> not using (D)TLS!

Oops:
http://tools.ietf.org/html/draft-ietf-httpbis-http2-11#section-11.1

Actually, I think that this is a good (re)use of the registry.  Sure,
it doesn't make sense to identify protocols within (D)TLS, but often
non-(D)TLS protocols need to be identified alongside (D)TLS protocols,
as is the case with the above.  (If you are confused about the where
this happens exactly, see
http://tools.ietf.org/html/draft-ietf-httpbis-http2-11#section-6.11).

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