Message Body Handling in the Session Initiation Protocol (SIP)
RFC 5621
| Document | Type |
RFC - Proposed Standard
(September 2009; No errata)
Updated by RFC 8262
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-camarillo-sip-body-handling | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5621 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Robert Sparks | ||
| Send notices to | theo@voip.co.uk | ||
Network Working Group G. Camarillo
Request for Comments: 5621 Ericsson
Updates: 3204, 3261, 3459 September 2009
Category: Standards Track
Message Body Handling in the Session Initiation Protocol (SIP)
Abstract
This document specifies how message bodies are handled in SIP.
Additionally, this document specifies SIP user agent support for MIME
(Multipurpose Internet Mail Extensions) in message bodies.
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 in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Camarillo Standards Track [Page 1]
RFC 5621 Message Body Handling in SIP September 2009
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Message Body Encoding . . . . . . . . . . . . . . . . . . . . 3
3.1. Background on Message Body Encoding . . . . . . . . . . . 3
3.2. UA Behavior to Encode Binary Message Bodies . . . . . . . 5
4. 'multipart' Message Bodies . . . . . . . . . . . . . . . . . . 6
4.1. Background on 'multipart' Message Bodies . . . . . . . . . 6
4.2. Mandatory Support for 'multipart' Message Bodies . . . . . 7
4.3. UA Behavior to Generate 'multipart' Message Bodies . . . . 7
5. 'multipart/mixed' Message Bodies . . . . . . . . . . . . . . . 7
6. 'multipart/alternative' Message Bodies . . . . . . . . . . . . 8
6.1. Background on 'multipart/alternative' Message Bodies . . . 8
6.2. UA Behavior to Generate 'multipart/alternative'
Message Bodies . . . . . . . . . . . . . . . . . . . . . . 8
6.3. UA Behavior to Process 'multipart/alternative' Message
Bodies . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7. 'multipart/related' Message Bodies . . . . . . . . . . . . . . 9
7.1. Background on 'multipart/related' Message Bodies . . . . . 9
7.2. UA Behavior to Generate 'multipart/related' Message
Bodies . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.3. UA Behavior to Process 'multipart/related' Message
Bodies . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8. Disposition Types . . . . . . . . . . . . . . . . . . . . . . 10
8.1. Background on Content and Disposition Types in SIP . . . . 10
8.2. UA Behavior to Set the 'handling' Parameter . . . . . . . 12
8.3. UA Behavior to Process 'multipart/alternative' . . . . . . 13
8.4. UAS Behavior to Report Unsupported Message Bodies . . . . 13
9. Message Body Processing . . . . . . . . . . . . . . . . . . . 14
9.1. Background on References to Message Body Parts . . . . . . 14
9.2. UA Behavior to Generate References to Message Bodies . . . 14
9.3. UA Behavior to Process Message Bodies . . . . . . . . . . 14
9.4. The 'by-reference' Disposition Type . . . . . . . . . . . 15
10. Guidelines to Authors of SIP Extensions . . . . . . . . . . . 16
11. Security Considerations . . . . . . . . . . . . . . . . . . . 16
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
12.1. Registration of the 'by-reference' Disposition Type . . . 17
12.2. Update of the 'handling' Parameter Registration . . . . . 17
13. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 17
14. References . . . . . . . . . . . . . . . . . . . . . . . . . . 17
14.1. Normative References . . . . . . . . . . . . . . . . . . . 17
14.2. Informative References . . . . . . . . . . . . . . . . . . 18
Camarillo Standards Track [Page 2]
RFC 5621 Message Body Handling in SIP September 2009
1. Introduction
Message body handling in SIP was originally specified in [RFC3261],
which relied on earlier specifications (e.g., MIME) to describe some
areas. This document contains background material on how bodies are
handled in SIP and normative material on areas that had not been
specified before or whose specifications needed to be completed.
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