An Extension to the REsource LOcation And Discovery (RELOAD) Protocol to Support Relay Peer Routing
RFC 7264

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Internet Engineering Task Force (IETF)                           N. Zong
Request for Comments: 7264                                      X. Jiang
Category: Standards Track                                        R. Even
ISSN: 2070-1721                                      Huawei Technologies
                                                                Y. Zhang
                                                  CoolPad / China Mobile
                                                               June 2014

 An Extension to the REsource LOcation And Discovery (RELOAD) Protocol
                     to Support Relay Peer Routing

Abstract

   This document defines an optional extension to the REsource LOcation
   And Discovery (RELOAD) protocol to support the relay peer routing
   mode.  RELOAD recommends symmetric recursive routing for routing
   messages.  The new optional extension provides a shorter route for
   responses, thereby reducing overhead on intermediate peers.  This
   document also describes potential cases where this extension can be
   used.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7264.

Zong, et al.                 Standards Track                    [Page 1]
RFC 7264                       P2PSIP RPR                      June 2014

Copyright Notice

   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.

Zong, et al.                 Standards Track                    [Page 2]
RFC 7264                       P2PSIP RPR                      June 2014

Table of Contents
   1. Introduction ....................................................3
   2. Terminology .....................................................4
   3. Overview ........................................................5
      3.1. RPR ........................................................5
      3.2. Scenarios Where RPR Can Be Used ............................6
           3.2.1. Managed or Closed P2P Systems .......................6
           3.2.2. Using Bootstrap Nodes as Relay Peers ................7
           3.2.3. Wireless Scenarios ..................................7
   4. Relationship between SRR and RPR ................................7
      4.1. How RPR Works ..............................................7
      4.2. How SRR and RPR Work Together ..............................7
   5. RPR Extensions to RELOAD ........................................8
      5.1. Basic Requirements .........................................8
      5.2. Modification to RELOAD Message Structure ...................8
           5.2.1. Extensive Routing Mode ..............................8
      5.3. Creating a Request .........................................9
           5.3.1. Creating a Request for RPR ..........................9
      5.4. Request and Response Processing ............................9
           5.4.1. Destination Peer: Receiving a Request and
                  Sending a Response ..................................9
           5.4.2. Sending Peer: Receiving a Response .................10
           5.4.3. Relay Peer Processing ..............................10
   6. Overlay Configuration Extension ................................10
   7. Discovery of Relay Peers .......................................11
   8. Security Considerations ........................................11
   9. IANA Considerations ............................................11
      9.1. A New RELOAD Forwarding Option ............................11
   10. Acknowledgments ...............................................11
   11. References ....................................................12
      11.1. Normative References .....................................12
      11.2. Informative References ...................................12
   Appendix A. Optional Methods to Investigate Peer Connectivity .....13