Registration Event Package Extension for Session Initiation Protocol (SIP) Globally Routable User Agent URIs (GRUUs)
RFC 5628
Network Working Group P. Kyzivat
Request for Comments: 5628 Cisco Systems, Inc.
Category: Standards Track October 2009
Registration Event Package Extension for
Session Initiation Protocol (SIP)
Globally Routable User Agent URIs (GRUUs)
Abstract
RFC 3680 defines a Session Initiation Protocol (SIP) event package
for registration state. This package allows a watcher to learn about
information stored by a SIP registrar, including its registered
contact.
However, the registered contact is frequently unreachable and thus
not useful for watchers. The Globally Routable User Agent URI
(GRUU), defined in RFC 5627, is a URI that is capable of reaching a
particular contact. However this URI is not included in the document
format defined in RFC 3680. This specification defines an extension
to the registration event package to include GRUUs assigned by the
registrar.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
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.
Kyzivat Standards Track [Page 1]
RFC 5628 Reg Event GRUU Extension October 2009
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Description . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Notifier Processing of SUBSCRIBE Requests . . . . . . . . . . 4
5. Notifier Generation of NOTIFY Requests . . . . . . . . . . . . 4
6. Subscriber Processing of NOTIFY Requests . . . . . . . . . . . 5
6.1. Managing Temporary GRUU Lifetime . . . . . . . . . . . . . 5
7. Sample reginfo Document . . . . . . . . . . . . . . . . . . . 7
8. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.1. Example: Welcome Notice . . . . . . . . . . . . . . . . . 8
8.2. Example: Implicit Registration . . . . . . . . . . . . . . 8
9. XML Schema Definition . . . . . . . . . . . . . . . . . . . . 11
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
10.1. URN Sub-Namespace Registration . . . . . . . . . . . . . . 12
10.2. XML Schema Registration . . . . . . . . . . . . . . . . . 13
11. Security Considerations . . . . . . . . . . . . . . . . . . . 13
12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 14
13.1. Normative References . . . . . . . . . . . . . . . . . . . 14
13.2. Informative References . . . . . . . . . . . . . . . . . . 14
Kyzivat Standards Track [Page 2]
RFC 5628 Reg Event GRUU Extension October 2009
1. Introduction
RFC 3680 [2] defines a Session Initiation Protocol (SIP) [5] event
package for registration state. This package allows a watcher to
learn about information stored by a SIP registrar, including the
registered contacts.
However, a registered contact is frequently unreachable from hosts
outside of the domain of the User Agent (UA). It is commonly a
Show full document text