A Mechanism for Transporting User-to-User Call Control Information in SIP
RFC 7433
| Document | Type | RFC - Proposed Standard (January 2015; No errata) | |
|---|---|---|---|
| Authors | Alan Johnston , James Rafferty | ||
| Last updated | 2015-10-14 | ||
| Replaces | draft-johnston-cuss-sip-uui | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Vijay Gurbani | ||
| Shepherd write-up | Show (last changed 2012-09-24) | ||
| IESG | IESG state | RFC 7433 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alissa Cooper | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) A. Johnston
Request for Comments: 7433 Avaya
Category: Standards Track J. Rafferty
ISSN: 2070-1721 Human Communications
January 2015
A Mechanism for Transporting User-to-User Call Control Information
in SIP
Abstract
There is a class of applications that benefit from using SIP to
exchange User-to-User Information (UUI) data during session
establishment. This information, known as call control UUI data, is
a small piece of data inserted by an application initiating the
session and utilized by an application accepting the session. The
syntax and semantics for the UUI data used by a specific application
are defined by a UUI package. This UUI data is opaque to SIP and its
function is unrelated to any basic SIP function. This document
defines a new SIP header field, User-to-User, to transport UUI data,
along with an extension mechanism.
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/rfc7433.
Johnston & Rafferty Standards Track [Page 1]
RFC 7433 SIP UUI for CC January 2015
Copyright Notice
Copyright (c) 2015 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. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Requirements Discussion . . . . . . . . . . . . . . . . . . . 4
4. Normative Definition . . . . . . . . . . . . . . . . . . . . 5
4.1. Syntax for UUI Header Field . . . . . . . . . . . . . . . 6
4.2. Hex Encoding Definition . . . . . . . . . . . . . . . . . 7
4.3. Source Identity of UUI Data . . . . . . . . . . . . . . . 7
5. Guidelines for UUI Packages . . . . . . . . . . . . . . . . . 9
5.1. Extensibility . . . . . . . . . . . . . . . . . . . . . . 10
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
6.1. Registration of User-to-User Header Field . . . . . . . . 11
6.2. Registration of User-to-User Header Field Parameters . . 11
6.3. Registration of UUI Packages . . . . . . . . . . . . . . 11
6.4. Registration of UUI Content Parameters . . . . . . . . . 12
6.5. Registration of UUI Encoding Parameters . . . . . . . . . 12
6.6. Registration of SIP Option Tag . . . . . . . . . . . . . 13
7. Security Considerations . . . . . . . . . . . . . . . . . . . 13
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.1. Normative References . . . . . . . . . . . . . . . . . . 14
8.2. Informative References . . . . . . . . . . . . . . . . . 15
Appendix A. Other Possible Mechanisms . . . . . . . . . . . . . 17
A.1. Why INFO is Not Used . . . . . . . . . . . . . . . . . . 17
A.2. Why Other Protocol Encapsulation UUI Mechanisms Are Not
Used . . . . . . . . . . . . . . . . . . . . . . . . . . 17
A.3. MIME Body Approach . . . . . . . . . . . . . . . . . . . 17
A.4. URI Parameter . . . . . . . . . . . . . . . . . . . . . . 18
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 19
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 19
Johnston & Rafferty Standards Track [Page 2]
RFC 7433 SIP UUI for CC January 2015
1. Overview
This document describes the transport of UUI data using SIP
[RFC3261]. It defines a mechanism for the transport of general
application UUI data and for the transport of the call control
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