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.

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 July 31, 2010.

Copyright Notice

Copyright (c) 2010 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., “SIP Forum 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. 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] (Daigle, L. and A. Newton, “Domain-Based Application Service Location Using SRV RRs and the Dynamic Delegation Discovery Service (DDDS),” January 2005.) and [RFC4848] (Daigle, L., “Domain-Based Application Service Location Using URIs and the Dynamic Delegation Discovery Service (DDDS),” April 2007.).

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] (Daigle, L. and A. Newton, “Domain-Based Application Service Location Using SRV RRs and the Dynamic Delegation Discovery Service (DDDS),” January 2005.).

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

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] (Daigle, L., “Domain-Based Application Service Location Using URIs and the Dynamic Delegation Discovery Service (DDDS),” April 2007.).

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

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., “SIP Forum 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