SIP-Specific Event Notification
RFC 6665
| Document | Type |
RFC - Proposed Standard
(July 2012; No errata)
Updated by RFC 7621
Obsoletes RFC 3265
|
|
|---|---|---|---|
| Last updated | 2018-12-20 | ||
| Replaces | draft-roach-sipcore-rfc3265bis | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 6665 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Robert Sparks | ||
| IESG note | Paul Kyzivat (pkyzivat@alum.mit.edu) is the document shepherd. | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) A.B. Roach
Request for Comments: 6665 Tekelec
Obsoletes: 3265 July 2012
Updates: 3261, 4660
Category: Standards Track
ISSN: 2070-1721
SIP-Specific Event Notification
Abstract
This document describes an extension to the Session Initiation
Protocol (SIP) defined by RFC 3261. The purpose of this extension is
to provide an extensible framework by which SIP nodes can request
notification from remote nodes indicating that certain events have
occurred.
Note that the event notification mechanisms defined herein are NOT
intended to be a general-purpose infrastructure for all classes of
event subscription and notification.
This document represents a backwards-compatible improvement on the
original mechanism described by RFC 3265, taking into account several
years of implementation experience. Accordingly, this document
obsoletes RFC 3265. This document also updates RFC 4660 slightly to
accommodate some small changes to the mechanism that were discussed
in that document.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6665.
Roach Standards Track [Page 1]
RFC 6665 SIP-Specific Event Notification July 2012
Copyright Notice
Copyright (c) 2012 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 Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Overview of Operation . . . . . . . . . . . . . . . . . . 5
1.2. Documentation Conventions . . . . . . . . . . . . . . . . 6
2. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. SIP Methods for Event Notification . . . . . . . . . . . . . . 7
3.1. SUBSCRIBE . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.1. Subscription Duration . . . . . . . . . . . . . . . . 7
3.1.2. Identification of Subscribed Events and Event
Classes . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.3. Additional SUBSCRIBE Header Field Values . . . . . . . 9
3.2. NOTIFY . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.1. Identification of Reported Events, Event Classes,
and Current State . . . . . . . . . . . . . . . . . . 9
4. Node Behavior . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1. Subscriber Behavior . . . . . . . . . . . . . . . . . . . 10
4.1.1. Detecting Support for SIP Events . . . . . . . . . . . 10
4.1.2. Creating and Maintaining Subscriptions . . . . . . . . 10
4.1.3. Receiving and Processing State Information . . . . . . 14
4.1.4. Forking of SUBSCRIBE Requests . . . . . . . . . . . . 16
4.2. Notifier Behavior . . . . . . . . . . . . . . . . . . . . 17
4.2.1. Subscription Establishment and Maintenance . . . . . . 17
4.2.2. Sending State Information to Subscribers . . . . . . . 20
4.2.3. PSTN/Internet Interworking (PINT) Compatibility . . . 23
4.3. Proxy Behavior . . . . . . . . . . . . . . . . . . . . . . 23
4.4. Common Behavior . . . . . . . . . . . . . . . . . . . . . 24
4.4.1. Dialog Creation and Termination . . . . . . . . . . . 24
4.4.2. Notifier Migration . . . . . . . . . . . . . . . . . . 24
4.4.3. Polling Resource State . . . . . . . . . . . . . . . . 25
4.4.4. "Allow-Events" Header Field Usage . . . . . . . . . . 26
4.5. Targeting Subscriptions at Devices . . . . . . . . . . . . 26
4.5.1. Using GRUUs to Route to Devices . . . . . . . . . . . 27
Roach Standards Track [Page 2]
RFC 6665 SIP-Specific Event Notification July 2012
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