Internet DRAFT - draft-holmberg-dispatch-pani-abnf
draft-holmberg-dispatch-pani-abnf
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.
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This Internet-Draft will expire on October 10, 2016.
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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.
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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
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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,
<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>.
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[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
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