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Re: New Version Notification for draft-troan-6man-universal-ra-option-03.txt

Ted Lemon <mellon@fugue.com> Fri, 09 October 2020 02:10 UTC

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From: Ted Lemon <mellon@fugue.com>
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Subject: Re: New Version Notification for draft-troan-6man-universal-ra-option-03.txt
Date: Thu, 08 Oct 2020 22:10:37 -0400
Message-Id: <0CC85EA5-8A06-48E9-AE85-70F91A9AE9BC@fugue.com>
References: <CANMZLAb3FdZRcpzctXFE_coUQHKT0aTRn6ymkZQjT-KGuwNRYg@mail.gmail.com>
Cc: Ole Troan <otroan@employees.org>, Michael Richardson <mcr+ietf@sandelman.ca>, ipv6@ietf.org
In-Reply-To: <CANMZLAb3FdZRcpzctXFE_coUQHKT0aTRn6ymkZQjT-KGuwNRYg@mail.gmail.com>
To: Brian Carpenter <brian.e.carpenter@gmail.com>
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Brian, that’s what I’m saying is a problem. You don’t want self describing encodings when the data format is required to be fixed: that just adds an extra step. 

That said, Ole’s point that we don’t have a CDDL-to-tlv compiler is somewhat compelling. 

> On Oct 8, 2020, at 21:02, Brian Carpenter <brian.e.carpenter@gmail.com> wrote:
> 
> 
> The big difference is that CBOR items are self-describing and TLVs are not.
> 
> Regards
>     Brian
>     (via tiny screen & keyboard)
> 
>> On Fri, 9 Oct 2020, 11:32 Ole Troan, <otroan@employees.org> wrote:
>> 
>> 
>>>> On 9 Oct 2020, at 00:19, Ted Lemon <mellon@fugue.com> wrote:
>>>> 
>>> On Oct 8, 2020, at 6:17 PM, Ole Troan <otroan@employees.org> wrote:
>>>> Which is why the objects are described in CDDL. 
>>> 
>>> That’s lovely, but then why not just compile the CDDL into a TLV parser?
>> 
>> The idea here is to allow users of the option to use existing tools and libraries. Shouldn’t we all be tired of hand crafting C code to parse packets by now?
>> 
>> If you want to build a toolset around a modeling language and TLV representations to compete with CDDL, CBOR, JSON feel free. But I don’t think you should expect us to wait for you. :-)
>> 
>> Ole
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