Re: [Ntp] 16 bit extension numbers

Watson Ladd <watsonbladd@gmail.com> Thu, 20 February 2020 01:27 UTC

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From: Watson Ladd <watsonbladd@gmail.com>
Date: Wed, 19 Feb 2020 17:27:01 -0800
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To: Harlan Stenn <stenn@nwtime.org>
Cc: NTP WG <ntp@ietf.org>
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Subject: Re: [Ntp] 16 bit extension numbers
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On Wed, Feb 19, 2020, 5:17 PM Harlan Stenn <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
> >
> > _______________________________________________
> > ntp mailing list
> > ntp@ietf.org
> > https://www.ietf.org/mailman/listinfo/ntp
> >
>
> --
> Harlan Stenn <stenn@nwtime.org>
> http://networktimefoundation.org - be a member!
>
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