Re: [Ntp] 16 bit extension numbers

Harlan Stenn <stenn@nwtime.org> Thu, 20 February 2020 01:40 UTC

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To: Watson Ladd <watsonbladd@gmail.com>
Cc: NTP WG <ntp@ietf.org>
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From: Harlan Stenn <stenn@nwtime.org>
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Date: Wed, 19 Feb 2020 17:40:45 -0800
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Subject: Re: [Ntp] 16 bit extension numbers
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I will hold my response until either/both of the Chairs responds.

H

On 2/19/2020 5:27 PM, Watson Ladd wrote:
> 
> 
> On Wed, Feb 19, 2020, 5:17 PM Harlan Stenn <stenn@nwtime.org
> <mailto:stenn@nwtime.org>> wrote:
> 
>     Do I need to repeat why this is a bad idea?
> 
> 
> What is a bad idea? TLS does just fine with a flat extension space.
> 
> 
>     H
> 
>     On 2/19/2020 5:08 PM, Watson Ladd wrote:
>     > Dear all,
>     >
>     > The value of having all 16 bits available, and reserving 1/2 the space
>     > (or maybe a bit less) as experimental is tremendous: it means we don't
>     > have to worry about coordinating values and can let IANA assign them
>     > from the bottom to the top of the space.
>     >
>     > Grouping related extensions by having a code and a type as Harlan is
>     > proposing wastes space: a type with no codes consumes 256 possible
>     > extension values, and the greatest number of codes ever used is 10.
>     > Each flag bit cuts the number of extensions in half: one has to be
>     > really sure that bit is valuable, and they aren't: one of them is
>     > depreciated and reserved for a protocol you shouldn't use.
>     >
>     > I don't see any reason to be so profligate.
>     >
>     > Sincerely,
>     > Watson
>     >
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>     >
> 
>     -- 
>     Harlan Stenn <stenn@nwtime.org <mailto:stenn@nwtime.org>>
>     http://networktimefoundation.org - be a member!
> 
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-- 
Harlan Stenn <stenn@nwtime.org>
http://networktimefoundation.org - be a member!