Network Working Group M. Procter Internet-Draft VoIP.co.uk Intended status: Informational S. Lawrence Expires: May 21, 2010 Nortel Networks, Inc. November 17, 2009 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 Procter & Lawrence Expires May 21, 2010 [Page 1] Internet-Draft SIP Forum UA Config Service Tag November 2009 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 . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. SFUA:PAN Application Service Tag Registration . . . . . . . . . 3 3. SFUA:CFG Application Service Tag Registration . . . . . . . . . 4 4. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4 6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.1. Normative References . . . . . . . . . . . . . . . . . . . 4 6.2. Informative References . . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5 Procter & Lawrence Expires May 21, 2010 [Page 2] Internet-Draft SIP Forum UA Config Service Tag November 2009 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. 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. 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], which builds upon the S-NAPTR (Simple NAPTR) application defined in [RFC3958]. This domain to URL resolution DDDS application is described in section Section 3. 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: +-------------------------+-----------+ | Application Service Tag | SFUA:PAN | | Defining Publication | [SFUACFG] | +-------------------------+-----------+ Procter & Lawrence Expires May 21, 2010 [Page 3] Internet-Draft SIP Forum UA Config Service Tag November 2009 3. SFUA:CFG Application Service Tag Registration This document registers the following U-NAPTR application service tag: +-------------------------+-----------+ | 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., "User Agent Configuration Recommendation", December 2009. [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. 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. Procter & Lawrence Expires May 21, 2010 [Page 4] Internet-Draft SIP Forum UA Config Service Tag November 2009 URIs [1] 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 Nortel Networks, Inc. 600 Technology Park Billerica, MA 01821 USA Phone: +1 978 288 5508 Email: scott.lawrence@nortel.com Procter & Lawrence Expires May 21, 2010 [Page 5]