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Re: [Iot-directorate] Segmented strings (Re: [Rats] [Last-Call] EAT profiles (was Re: Iotdir last call review of draft-ietf-rats-eat-13))

Laurence Lundblade <lgl@island-resort.com> Thu, 09 June 2022 20:00 UTC

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From: Laurence Lundblade <lgl@island-resort.com>
In-Reply-To: <6CDA1CA0-A59A-4ED7-903F-0B6829F08075@tzi.org>
Date: Thu, 09 Jun 2022 12:57:57 -0700
Cc: Eliot Lear <lear@cisco.com>, iot-directorate@ietf.org, draft-ietf-rats-eat.all@ietf.org, last-call@ietf.org, rats <rats@ietf.org>, cbor@ietf.org
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To: Carsten Bormann <cabo@tzi.org>
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Subject: Re: [Iot-directorate] Segmented strings (Re: [Rats] [Last-Call] EAT profiles (was Re: Iotdir last call review of draft-ietf-rats-eat-13))
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> On Jun 9, 2022, at 12:30 PM, Carsten Bormann <cabo@tzi.org> wrote:
> 
> On 2022-06-09, at 21:17, Laurence Lundblade <lgl@island-resort.com> wrote:
>> 
>> One person legitimately implements sending EATS with  segmented strings  Another person legitimately implements without being able to decode  segmented strings. 
> 
> Well, an implementation that doesn’t handle segmented strings may be “legitimate”, but it won’t be a complete implementation (and thus not interoperable) if you decide EAT to make no restrictions on generating segmented strings.

Maybe use the term “fully conforming” rather than “legitimate” or “complete” where "fully conforming" means adherence to what is in the specification and its normative references and no more. No tacit assumptions about the way typical libraries behave or their level of completeness are required to guarantee interoperability.

I kind of expected the IETF to harass me if fully conforming implementations of something I wrote aren’t 100% guaranteed interoperable. That during review all the nooks and crannies where there might be interoperability issues would be ferreted out.

LL

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