CoRE Resource Directory Extensions
draft-amsuess-core-resource-directory-extensions-04

Document Type Active Internet-Draft (individual)
Author Christian Amsüss 
Last updated 2020-11-02
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CoRE                                                           C. Amsüss
Internet-Draft                                           2 November 2020
Intended status: Experimental                                           
Expires: 6 May 2021

                   CoRE Resource Directory Extensions
          draft-amsuess-core-resource-directory-extensions-04

Abstract

   A collection of extensions to the Resource Directory
   [I-D.ietf-core-resource-directory] that can stand on their own, and
   have no clear future in specification yet.

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 6 May 2021.

Copyright Notice

   Copyright (c) 2020 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
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   Please review these documents carefully, as they describe your rights
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   provided without warranty as described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Reverse Proxy requests  . . . . . . . . . . . . . . . . . . .   3
     2.1.  Discovery . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Registration  . . . . . . . . . . . . . . . . . . . . . .   3
       2.2.1.  Registration updates  . . . . . . . . . . . . . . . .   4
       2.2.2.  Proxy behavior  . . . . . . . . . . . . . . . . . . .   4
       2.2.3.  On-Demand proxying  . . . . . . . . . . . . . . . . .   5
       2.2.4.  Multiple upstreams  . . . . . . . . . . . . . . . . .   5
       2.2.5.  Examples  . . . . . . . . . . . . . . . . . . . . . .   5
       2.2.6.  Notes on stability and maturity . . . . . . . . . . .   7
       2.2.7.  Security considerations . . . . . . . . . . . . . . .   7
   3.  Infinite lifetime . . . . . . . . . . . . . . . . . . . . . .   7
     3.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Lookup across link relations  . . . . . . . . . . . . . . . .   8
     4.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Lifetime Age  . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Zone identifier introspection . . . . . . . . . . . . . . . .   9
     6.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .  10
   7.  Proxying multicast requests . . . . . . . . . . . . . . . . .  10
     7.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .  11
   8.  Opportunistic RD  . . . . . . . . . . . . . . . . . . . . . .  11
     8.1.  Applications  . . . . . . . . . . . . . . . . . . . . . .  14
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  14
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  15
   Appendix A.  Change log . . . . . . . . . . . . . . . . . . . . .  16
   Appendix B.  Acknowledgements . . . . . . . . . . . . . . . . . .  17
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   This document pools some extensions to the Resource Directory
   [I-D.ietf-core-resource-directory] that might be useful but have no
   place in the original document.

   They might become individual documents for IETF submission, simple
   registrations in the RD Parameter Registry at IANA, or grow into a
   shape where they can be submitted as a collection of tools.

   At its current state, this draft is a collection of ideas.

   [ This document is being developed at https://gitlab.com/chrysn/
   resource-directory-extensions (https://gitlab.com/chrysn/resource-
   directory-extensions). ]

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2.  Reverse Proxy requests

   When a registrant registers at a Resource Directory, it might not
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