Network Working Group C. Holmberg Internet-Draft Ericsson Updates: 7315 (if approved) April 8, 2016 Intended status: Informational Expires: October 10, 2016 P-Access-Network-Info ABNF Update draft-holmberg-dispatch-pani-abnf-03 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 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 October 10, 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 Holmberg Expires October 10, 2016 [Page 1] Internet-Draft PANI ABNF April 2016 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. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3 5. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 3 6. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . 4 7. Normative References . . . . . . . . . . . . . . . . . . . . 4 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 5 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. 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. Holmberg Expires October 10, 2016 [Page 2] Internet-Draft PANI ABNF April 2016 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 / ci-3gpp2-femto / fiber-location / np / gstn-location /local-time-zone / dvb-rcs2-node-id / operator-specific-GI / utran-sai-3gpp / extension-access-info np = "network-provided" extension-access-info = generic-param 3. 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. 4. IANA Considerations This document makes no requests from IANA. 5. Acknowledgments TBD Holmberg Expires October 10, 2016 [Page 3] Internet-Draft PANI ABNF April 2016 6. Change Log [RFC EDITOR NOTE: Please remove this section when publishing] Changes from draft-holmberg-dispatch-pani-abnf-02 o Changes based on AD review by Ben Campbell. o - 'Conventions' section removed, as the draft does not contain any RFC 2119 keywords. o - Reference to RFC 2119 removed. o 'operator-specific-GI' and 'utran-sai-3gpp' values added to list of 'access-info' values. o 24.229 reference version updated. 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'. 7. Normative References [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, . [RFC5234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, DOI 10.17487/RFC5234, January 2008, . [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, . Holmberg Expires October 10, 2016 [Page 4] Internet-Draft PANI ABNF April 2016 [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 13.5.1, March 2016. Author's Address Christer Holmberg Ericsson Hirsalantie 11 Jorvas 02420 Finland Email: christer.holmberg@ericsson.com Holmberg Expires October 10, 2016 [Page 5]