CoRE Resource Directory Extensions
draft-amsuess-core-resource-directory-extensions-02

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CoRE                                                          C. Amsuess
Internet-Draft                                        September 23, 2019
Intended status: Experimental
Expires: March 26, 2020

                   CoRE Resource Directory Extensions
          draft-amsuess-core-resource-directory-extensions-02

Abstract

   [ See Introduction ]

Status of This Memo

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   This Internet-Draft will expire on March 26, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
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   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.  Examples  . . . . . . . . . . . . . . . . . . . . . .   5
       2.2.5.  Notes on stability and maturity . . . . . . . . . . .   6
       2.2.6.  Security considerations . . . . . . . . . . . . . . .   6
   3.  Infinite lifetime . . . . . . . . . . . . . . . . . . . . . .   7
     3.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Lookup across link relations  . . . . . . . . . . . . . . . .   7
     4.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Lifetime Age  . . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Zone identifier introspection . . . . . . . . . . . . . . . .   8
     6.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   9
   7.  Proxying multicast requests . . . . . . . . . . . . . . . . .   9
     7.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .  10
   8.  Opportunistic RD  . . . . . . . . . . . . . . . . . . . . . .  10
     8.1.  Applications  . . . . . . . . . . . . . . . . . . . . . .  13
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
     9.3.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .  14
   Appendix A.  Change log . . . . . . . . . . . . . . . . . . . . .  15
   Appendix B.  Acknowledgements . . . . . . . . . . . . . . . . . .  15
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  15

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 [1].  ]

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2.  Reverse Proxy requests

   When a registrant registers at a Resource Directory, it might not
   have a suitable address it can use as a base address.  Typical
   reasons include being inside a NAT without control over port
   forwarding, or only being able to open outgoing connections (as