Re: [core] CoAP option for Well-Known Uri-Path

[Christian Amsüss <[e-mail]>]

On Sun, Sep 19, 2021 at 04:15:33PM -0400, Michael Richardson wrote:
> Has anyone considered a CoAP-Option that would compress well-known prefixes?
> So, instead of:
>     Uri-Path ".well-known"
>     Uri-Path "brski"
>     Uri-Path "sen"
> 
> one could have:
>     Well-Known-Uri-Path [CBOR-int from to be created .well-known Registry column]
>     Uri-Path "sen"
> 
> Takes some coordination to get it deployed, but in some greenfields we could
> do this now.

I have a rough sketch, presented at [1]. In its minimal form it'd only
be a replacement for Uri-Path (ie. .well-known/brski/sen would need a
point just as any other brski path), but "prepend to actual path"
semantics are feasible at slightly increased processing effort for those
who use it.

Main stopper for further work since May was that I'd like to build it on
SCHC semantically, but if urgency comes to it, the option could just as
well be defined, and the SCHC semantics retconned into it.

BR
c

[1]: https://datatracker.ietf.org/meeting/interim-2021-core-05/session/core

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