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Publish Option for CoAP
draft-fossati-core-publish-option-03

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Last updated: 2014-01-06
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Internet Engineering Task Force                               T. Fossati
Internet-Draft                                            Alcatel-Lucent
Intended status: Standards Track                             P. Giacomin
Expires: July 10, 2014                                         Freelance
                                                               S. Loreto
                                                                Ericsson
                                                        January 06, 2014

                        Publish Option for CoAP
                  draft-fossati-core-publish-option-03

Abstract

   This memo defines the Publish Option for the Constrained Application
   Protocol (CoAP).  The Publish Option is used by a CoAP Endpoint to
   control the authority delegation of one of its resources to another
   Endpoint.  All the phases of the authority delegation process (setup,
   renewal, cancellation) are controlled by a simple RESTful protocol.

   This memo also introduces the 'proxies' Web Linking relation type, to
   be used by a CoAP Proxy to explicitly advertise the resources that it
   can serve - either from its cache, or by forwarding the Client's
   request upstream.

   The Publish Option and the 'proxies' relation provide the building
   blocks for a comprehensive, in-protocol, solution to the sleepy/
   intermittent Endpoint use case.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on July 10, 2014.

Copyright Notice

Fossati, et al.           Expires July 10, 2014                 [Page 1]
Internet-Draft           Publish Option for CoAP            January 2014

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language and Motivation  . . . . . . . . . .   3
   2.  Publish Option  . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Value Format  . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Operations  . . . . . . . . . . . . . . . . . . . . . . .   4
       2.2.1.  Publishing a Resource . . . . . . . . . . . . . . . .   4
       2.2.2.  Updating a Resource . . . . . . . . . . . . . . . . .   6
       2.2.3.  Unpublishing a Resource . . . . . . . . . . . . . . .   6
       2.2.4.  Checking for Change . . . . . . . . . . . . . . . . .   7
   3.  The 'proxies' Relation Type . . . . . . . . . . . . . . . . .   7
     3.1.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .   7
       3.1.1.  Discover the Proxy for a Resource . . . . . . . . . .   8
       3.1.2.  Discover all the Resources that an Endpoint 'proxies'   8
     3.2.  Publish Link-Format Attributes  . . . . . . . . . . . . .   9
       3.2.1.  Implicitly  . . . . . . . . . . . . . . . . . . . . .   9
       3.2.2.  Explicitly  . . . . . . . . . . . . . . . . . . . . .   9
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
     6.1.  Securing the Delegation . . . . . . . . . . . . . . . . .  10
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Appendix A.  A (fairly) Comprehensive Example . . . . . . . . . .  11
     A.1.  Actors  . . . . . . . . . . . . . . . . . . . . . . . . .  12

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