IANA Registration of the SFUACFG Application Service Tag
draft-sipforum-ua-config-01

Abstract

This document defines an application service tag for use according to RFC 4848 in the automated SIP User Agent configuration process defined by the SIP Forum.

Status of this Memo

This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts.

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.”

The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt.

The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html.

This Internet-Draft will expire on May 21, 2010.

Copyright Notice

Copyright (c) 2009 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 BSD License.

Table of Contents

1.  Introduction
2.  SFUA:PAN Application Service Tag Registration
3.  SFUA:CFG Application Service Tag Registration
4.  Security Considerations
5.  IANA Considerations
6.  References
    6.1.  Normative References
    6.2.  Informative References
§  Authors' Addresses

1.  Introduction

The SIP Forum User Agent Configuration Recommendation (Lawrence, S., Ed., “User Agent Configuration Recommendation,” December 2009.) [SFUACFG] defines a procedure for SIP [RFC3261] (Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M., and E. Schooler, “SIP: Session Initiation Protocol,” June 2002.) User Agents to

1. determine the SIP domain from which to request configuration,
2. locate one or more server(s) that provide the configuration service for that domain,
3. construct a URL for and request configuration from that service,
4. request that the service send notices of any changes to that configuration.

Two of the steps in this process are accomplished in whole or in part using DDDS Applications.

The first step, determining the SIP domain from which to request configuration, allows for multiple mechanisms; one of the mechanisms uses as input a string of decimal numbers to identify the SIP domain. This string is called a "SIPForum Provider Alias Number" (SPAN). The SPAN is resolved to a DNS domain name using a DDDS application, described in section Section 2 (SFUA:PAN Application Service Tag Registration).

The second step, locating the configuration service for a given domain, resolves a configuration service domain name to an https base URL by using the U-NAPTR (URI-Enabled NAPTR) application defined in [RFC4848] (Daigle, L., “Domain-Based Application Service Location Using URIs and the Dynamic Delegation Discovery Service (DDDS),” April 2007.), which builds upon the S-NAPTR (Simple NAPTR) application defined in [RFC3958] (Daigle, L. and A. Newton, “Domain-Based Application Service Location Using SRV RRs and the Dynamic Delegation Discovery Service (DDDS),” January 2005.). This domain to URL resolution DDDS application is described in section Section 3 (SFUA:CFG Application Service Tag Registration).

This document registers the application service tags for these applications.

2.  SFUA:PAN Application Service Tag Registration

This document registers the following S-NAPTR application service tag:

3.  SFUA:CFG Application Service Tag Registration

This document registers the following U-NAPTR application service tag:

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] (Lawrence, S., Ed., “User Agent Configuration Recommendation,” December 2009.). 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] (Daigle, L. and A. Newton, “Domain-Based Application Service Location Using SRV RRs and the Dynamic Delegation Discovery Service (DDDS),” January 2005.).

6.  References

6.1. Normative References

6.2. Informative References

Authors' Addresses