Internet DRAFT - draft-sipforum-ua-config
draft-sipforum-ua-config
Network Working Group M. Procter
Internet-Draft VoIP.co.uk
Intended status: Informational S. Lawrence
Expires: July 31, 2010 Avaya Inc.
January 27, 2010
IANA Registration of the SFUACFG Application Service Tags
draft-sipforum-ua-config-02
Abstract
This document defines two application service tags for use according
to RFC 3958 and RFC 4848 in the automated SIP User Agent
configuration procedures defined by the SIP Forum.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. SFUA.PAN Application Service Tag Registration . . . . . . . . . 3
3. SFUA.CFG Application Service Tag Registration . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.1. Normative References . . . . . . . . . . . . . . . . . . . 4
6.2. Informative References . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5
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1. Introduction
The SIP Forum [1] User Agent Configuration Recommendation [SFUACFG]
defines a procedure for SIP [RFC3261] User Agents to
1. determine the SIP domain from which to request configuration,
2. construct a URL for and request configuration from the
configuration service provide by that domain,
3. request that the configuration service send notices of any
changes to that configuration.
Two of the steps (1 and 2) in this process are accomplished in whole
or in part using the DDDS Applications defined in [RFC3958] and
[RFC4848].
This document registers the application service tags for use with
these applications.
2. SFUA.PAN Application Service Tag Registration
One of the mechanisms by which a SIP User Agent can determine the DNS
name for the SIP domain for which it is to be configured is to accept
as user input a string of decimal digits to identify the SIP domain.
This digit string is called a "Provider Alias Number" (PAN). The PAN
is resolved to a DNS domain name using the S-NAPTR (Simple NAPTR)
DDDS application defined in [RFC3958].
This document registers the following S-NAPTR application service tag
for this purpose:
+-------------------------+-----------+
| Application Service Tag | SFUA.PAN |
| Defining Publication | [SFUACFG] |
+-------------------------+-----------+
3. SFUA.CFG Application Service Tag Registration
Having obtained the DNS name of a SIP domain from which to request
configuration, the SIP User Agent must construct an https base URL
with which to request configuration from the the configuration
service for that domain. To obtain the base URL, the User Agent
resolves the SIP domain name using the U-NAPTR (URI-Enabled NAPTR)
DDDS application defined in [RFC4848].
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This document registers the following U-NAPTR application service tag
for this purpose:
+-------------------------+-----------+
| Application Service Tag | SFUA.CFG |
| Defining Publication | [SFUACFG] |
+-------------------------+-----------+
4. Security Considerations
The security considerations of the various parts of the SIP Forum
User Agent Configuration Recommendation are discussed in its defining
specification: [SFUACFG]. There are no known security implications
of registering these specific application service tag values.
5. IANA Considerations
This document requests registration of the Application Service Tag
values "SFUA.PAN" and "SFUA.CFG" in the registry defined by
[RFC3958].
6. References
6.1. Normative References
[SFUACFG] Lawrence, S., Ed., "SIP Forum User Agent Configuration
Recommendation", December 2009.
Status: this document has successfully completed SIP Forum
Technical Working Group Last Call. The only substantive
changes anticipated between the current draft and the
final 1.0 version of the Recommendation are the references
to this document and two other Internet Drafts on which it
depends, and any revisions needed to harmonize it with the
final versions of those dependencies.
[RFC3958] Daigle, L. and A. Newton, "Domain-Based Application
Service Location Using SRV RRs and the Dynamic Delegation
Discovery Service (DDDS)", RFC 3958, January 2005.
[RFC4848] Daigle, L., "Domain-Based Application Service Location
Using URIs and the Dynamic Delegation Discovery Service
(DDDS)", RFC 4848, April 2007.
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6.2. Informative 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,
June 2002.
URIs
[1] <http://www.sipforum.org/>
Authors' Addresses
Michael Procter
VoIP.co.uk
Commerce House
Telford Road
Bicester, Oxfordshire OX26 4LD
UK
Email: michael@voip.co.uk
URI: http://voip.co.uk
Scott Lawrence
Avaya Inc.
Phone: +1 978 288 5508
Email: scottlawrenc@avaya.com
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