P-Access-Network-Info ABNF Update
RFC 7913

Document Type RFC - Informational (June 2016; No errata)
Updates RFC 7315
Last updated 2016-09-13
Stream IETF
Formats plain text pdf html bibtex
Reviews
Stream WG state (None)
Document shepherd Gonzalo Salgueiro
Shepherd write-up Show (last changed 2015-12-14)
IESG IESG state RFC 7913 (Informational)
Consensus Boilerplate Yes
Telechat date
Responsible AD Ben Campbell
Send notices to (None)
IANA IANA review state IANA OK - No Actions Needed
IANA action state No IANA Actions
Internet Engineering Task Force (IETF)                       C. Holmberg
Request for Comments: 7913                                      Ericsson
Updates: 7315                                                  June 2016
Category: Informational
ISSN: 2070-1721

                   P-Access-Network-Info ABNF Update

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), and by adding the following 'access-info' header
   field parameter values to the list of 'access-info' header field
   parameter values in the ABNF: 'operator-specific-GI' and
   'utran-sai-3gpp'.  The values are defined in the ABNF but are not
   included in the list.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 7841.

   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/rfc7913.

Holmberg                      Informational                     [Page 1]
RFC 7913                        PANI ABNF                      June 2016

Copyright Notice

   Copyright (c) 2016 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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Update to RFC 7315  . . . . . . . . . . . . . . . . . . . . .   3
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   4.  Normative References  . . . . . . . . . . . . . . . . . . . .   4
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .   4
   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] in [RFC7315] 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.

   The ABNF also defines the following 'access-info' header field
   parameter values: 'operator-specific-GI' and 'utran-sai-3gpp'.
   However, the values are not included in the list of 'access-info'
   values.

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

Holmberg                      Informational                     [Page 2]
RFC 7913                        PANI ABNF                      June 2016

   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 considered to cause issues with
   backward compatibility.

2.  Update to RFC 7315

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

  Old syntax:

      access-info            = cgi-3gpp / utran-cell-id-3gpp /
                               dsl-location / i-wlan-node-id /
                               ci-3gpp2 / eth-location /
                               ci-3gpp2-femto / fiber-location /
                               np / gstn-location /local-time-zone /
                               dvb-rcs2-node-id / extension-access-info
      np                     = "network-provided"
      extension-access-info  = gen-value

  New syntax:

      access-info            = cgi-3gpp / utran-cell-id-3gpp /
                               dsl-location / i-wlan-node-id /
                               ci-3gpp2 / eth-location /
Show full document text