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Re: [core] Eric Rescorla's Discuss on draft-ietf-core-coap-tcp-tls-08: (with DISCUSS and COMMENT)

Adam Roach <adam@nostrum.com> Wed, 24 May 2017 01:22 UTC

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To: Brian Raymor <Brian.Raymor@microsoft.com>, Hannes Tschofenig <hannes.tschofenig@gmx.net>, Carsten Bormann <cabo@tzi.org>, Eric Rescorla <ekr@rtfm.com>
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Subject: Re: [core] Eric Rescorla's Discuss on draft-ietf-core-coap-tcp-tls-08: (with DISCUSS and COMMENT)
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On 5/23/17 20:11, Brian Raymor wrote:
>      I can give you the motivation why we are interested in CoAP over TLS /TCP. We have an existing implementation of LWM2M,
>      which uses CoAP. We spent a lot of time getting that implementation rock-solid. Some enterprise deployments, which happen
>      to have interesting firewall policies, do not allow us to use UDP. Hence, we were interested to add a TCP-based transport to CoAP.
>      Making this enhancement turns out to be reasonably simple.


I'll note that the rationale for using WebSockets for this purpose 
appears to be significantly less clear, and the combination of TCP and 
WebSockets into a single document even more so.

/a

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