Retrieving the Capabilities of a PCP-controlled Device
draft-boucadair-pcp-capability-00

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PCP Working Group                                           M. Boucadair
Internet-Draft                                            France Telecom
Intended status: Standards Track                                R. Penno
Expires: March 21, 2013                                          D. Wing
                                                                   Cisco
                                                      September 17, 2012

         Retrieving the Capabilities of a PCP-controlled Device
                   draft-boucadair-pcp-capability-00

Abstract

   This document extends Port Control Protocol (PCP) with the ability to
   retrieve the capabilities of PCP-controlled device: CAPABILITY
   Option.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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 March 21, 2013.

Copyright Notice

   Copyright (c) 2012 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

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   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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  CAPABILITY  . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  Security Considerations . . . . . . . . . . . . . . . . . . . . 6
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 6
     5.1.  Normative References  . . . . . . . . . . . . . . . . . . . 6
     5.2.  Informative References  . . . . . . . . . . . . . . . . . . 7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 7

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1.  Introduction

   This document extends the base PCP [I-D.ietf-pcp-base] with a new
   feature to discover the capabilities of a PCP-controlled device.
   Retrieving the capabilities of a PCP-controlled device would allow to
   avoid error, provide a hint why some applications fails, help select
   the OpCode to issue, etc.

   This option can be elected to be defined as a new OpCode.

   This option has been defined first in [I-D.boucadair-pcp-extensions].

2.  CAPABILITY

   The CAPABILITY option (Code: TBA, Figure 1) is used by a PCP Server
   to indicate to a requesting PCP Client the capabilities it supports
   with regards to port forwarding operations.

   Several Capability options MAY be conveyed in the same PCP response
   message if several functions are co-located in the same PCP-
   controlled device (e.g., NAT44 and NAT64, NAT44 and ports set
   assignment capability, etc.).

   This option, when received from a PCP Server, is used by a PCP Client
   to constraint the content of its requests and therefore avoid errors.

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       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      | CAPABILITY    |  Reserved     |            0x01               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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