P-Access-Network-Info ABNF Update
draft-holmberg-dispatch-pani-abnf-02

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft that was ultimately published as RFC 7913.
Author Christer Holmberg
Last updated 2016-02-11 (Latest revision 2015-11-01)
RFC stream Internet Engineering Task Force (IETF)
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Document shepherd Gonzalo Salgueiro
Shepherd write-up Show Last changed 2015-12-14
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draft-holmberg-dispatch-pani-abnf-02 
Network Working Group                                        C. Holmberg
Internet-Draft                                                  Ericsson
Updates: 7315 (if approved)                             November 1, 2015
Intended status: Informational
Expires: May 4, 2016

                   P-Access-Network-Info ABNF Update
                  draft-holmberg-dispatch-pani-abnf-02

Abstract

   This document updates RFC 7315, by modifying the extension-access-
   info part of the P-Access-Network-Info header field Augmented Backus-
   Naur Form (ABNF).

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 4, 2016.

Copyright Notice

   Copyright (c) 2015 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.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Update to RFC 7315  . . . . . . . . . . . . . . . . . . . . .   2
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   3
   7.  Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   3
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   [RFC7315] defines the Session Initiation Protocol (SIP) [RFC3261] P-
   Access-Network-Info header field.

   The header field syntax contains an 'access-info' header field
   parameter, with a set of pre-defined values.  Most pre-defined values
   follow the 'generic-param' rule [RFC3261].  However, currently the
   Augmented Backus-Naur Form (ABNF) [RFC5234] requires new values to
   follow the 'gen-value' rule [RFC3261], which is more restrictive than
   'generic-param'.  There is no justification for the restriction, and
   new values have already been defined following the 'generic-param'
   rule.

   This document updates section 5.4 of [RFC7315], by modifying the
   extension-access-info part of the P-Access-Network-Info header field
   ABNF.

   As the P-Access-Network-Info header field is mainly used in networks
   defined by the 3rd-Generation Partnership Project (3GPP), where new
   values following the 'generic-param' rule have been defined
   [TS.3GPP.24.229], the update is not seen to cause backward
   compatibility concerns.

2.  Conventions

   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 [RFC2119].

3.  Update to RFC 7315

   This section updates the ABNF defined in section 5.4 of RFC 7315, as
   described below:

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   Old syntax:

       extension-access-info  = gen-value

   New syntax:

       extension-access-info  = generic-param

4.  Security Considerations

   The security considerations for the P-Access-Network-Info header
   field are defined in [RFC7315].  The ABNF update defined in this
   document does not impact the security considerations.

5.  IANA Considerations

   This document makes no requests from IANA.

6.  Acknowledgments

   TBD

7.  Change Log

   [RFC EDITOR NOTE: Please remove this section when publishing]

   Changes from draft-holmberg-dispatch-pani-abnf-01

   o  - Editorial fixes based on comments from Jean Mahoney.

   o  - Reference to 3GPP 24.229 added.

   Changes from draft-holmberg-dispatch-pani-abnf-00

   o  - Category changed to 'Informational'.

8.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.

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   [RFC3261]  Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston,
              A., Peterson, J., Sparks, R., Handley, M., and E.
              Schooler, "SIP: Session Initiation Protocol", RFC 3261,
              DOI 10.17487/RFC3261, June 2002,
              <http://www.rfc-editor.org/info/rfc3261>.

   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
              Specifications: ABNF", STD 68, RFC 5234,
              DOI 10.17487/RFC5234, January 2008,
              <http://www.rfc-editor.org/info/rfc5234>.

   [RFC7315]  Jesske, R., Drage, K., and C. Holmberg, "Private Header
              (P-Header) Extensions to the Session Initiation Protocol
              (SIP) for the 3GPP", RFC 7315, DOI 10.17487/RFC7315, July
              2014, <http://www.rfc-editor.org/info/rfc7315>.

   [TS.3GPP.24.229]
              3GPP, "IP multimedia call control protocol based on
              Session Initiation Protocol (SIP) and Session Description
              Protocol (SDP);Stage 3", 3GPP TS 24.229 13.3.1, September
              2015.

Author's Address

   Christer Holmberg
   Ericsson
   Hirsalantie 11
   Jorvas  02420
   Finland

   Email: christer.holmberg@ericsson.com

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