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Universal Plug and Play (UPnP) Internet Gateway Device - Port Control Protocol Interworking Function (IGD-PCP IWF)
RFC 6970

Internet Engineering Task Force (IETF)                      M. Boucadair
Request for Comments: 6970                                France Telecom
Category: Standards Track                                       R. Penno
ISSN: 2070-1721                                                  D. Wing
                                                                   Cisco
                                                               July 2013

                     Universal Plug and Play (UPnP)
 Internet Gateway Device - Port Control Protocol Interworking Function
                             (IGD-PCP IWF)

Abstract

   This document specifies the behavior of the Universal Plug and Play
   (UPnP) Internet Gateway Device - Port Control Protocol Interworking
   Function (IGD-PCP IWF).  A UPnP IGD-PCP IWF is required to be
   embedded in Customer Premises (CP) routers to allow for transparent
   NAT control in environments where a UPnP IGD is used on the LAN side
   and PCP is used on the external side of the CP router.

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/rfc6970.

Boucadair, et al.            Standards Track                    [Page 1]
RFC 6970                    UPnP IGD-PCP IWF                   July 2013

Copyright Notice

   Copyright (c) 2013 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 ......................................3
   2. Acronyms ........................................................4
   3. Architecture Model ..............................................4
   4. UPnP IGD-PCP IWF: Overview ......................................6
      4.1. UPnP IGD-PCP: State Variables ..............................6
      4.2. IGD-PCP: Methods ...........................................7
      4.3. UPnP IGD-PCP: Errors .......................................8
   5. Specification of the IGD-PCP IWF ................................9
      5.1. PCP Server Discovery .......................................9
      5.2. Control of the Firewall ...................................10
      5.3. Port Mapping Table ........................................10
      5.4. Interworking Function without NAT in the IGD ..............10
      5.5. NAT Embedded in the IGD ...................................11
      5.6. Creating a Mapping ........................................12
           5.6.1. AddAnyPortMapping() ................................12
           5.6.2. AddPortMapping() ...................................13
      5.7. Listing One or a Set of Mappings ..........................16
      5.8. Delete One or a Set of Mappings: DeletePortMapping() or
           DeletePortMappingRange() ..................................16
      5.9. Renewing a Mapping ........................................19
      5.10. Rapid Recovery ...........................................20
   6. Security Considerations ........................................21
   7. Acknowledgments ................................................21
   8. References .....................................................22
      8.1. Normative References ......................................22
      8.2. Informative References ....................................22

Boucadair, et al.            Standards Track                    [Page 2]
RFC 6970                    UPnP IGD-PCP IWF                   July 2013

1.  Introduction

   The Port Control Protocol (PCP) specification [RFC6887] discusses the
   implementation of NAT control features that rely upon Carrier Grade
   NAT devices such as a Dual-Stack Lite (DS-Lite) Address Family

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