Miscellaneous Capabilities Negotiation in the Session Description Protocol (SDP)
RFC 7006
Document | Type | RFC - Proposed Standard (September 2013; Errata) | |
---|---|---|---|
Authors | Miguel GarcĂa , Simo Veikkolainen , Robert Gilman | ||
Last updated | 2018-12-20 | ||
Replaces | draft-garcia-mmusic-sdp-miscellaneous-caps | ||
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 | Flemming Andreasen | ||
Shepherd write-up | Show (last changed 2013-05-20) | ||
IESG | IESG state | RFC 7006 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Gonzalo Camarillo | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) M. Garcia-Martin Request for Comments: 7006 Ericsson Category: Standards Track S. Veikkolainen ISSN: 2070-1721 Nokia R. Gilman September 2013 Miscellaneous Capabilities Negotiation in the Session Description Protocol (SDP) Abstract The Session Description Protocol (SDP) has been extended with a capability negotiation mechanism framework that allows the endpoints to negotiate transport protocols and attributes. This framework has been extended with a media capabilities negotiation mechanism that allows endpoints to negotiate additional media-related capabilities. This negotiation is embedded into the widely used SDP offer/answer procedures. This memo extends the SDP capability negotiation framework to allow endpoints to negotiate three additional SDP capabilities. In particular, this memo provides a mechanism to negotiate bandwidth ("b=" line), connection data ("c=" line), and session or media titles ("i=" line for each session or media). 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/rfc7006. Garcia-Martin, et al. Standards Track [Page 1] RFC 7006 SDP Misc. Capabilities Negotiation September 2013 Copyright Notice Copyright (c) 2013 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 ....................................................3 2. Conventions Used in This Document ...............................3 3. Protocol Description ............................................4 3.1. Extensions to SDP ..........................................4 3.1.1. Bandwidth Capability ................................6 3.1.2. Connection Data Capability ..........................8 3.1.3. Title Capability ...................................12 3.2. Session Level versus Media Level ..........................16 3.3. Offer/Answer Model Extensions .............................17 3.3.1. Generating the Initial Offer .......................17 3.3.2. Generating the Answer ..............................17 3.3.3. Offerer Processing of the Answer ...................18 3.3.4. Modifying the Session ..............................18 4. Field Replacement Rules ........................................18 5. Security Considerations ........................................18 6. IANA Considerations ............................................19 6.1. New SDP Attributes ........................................19 6.2. New Option Tags ...........................................20 6.3. New SDP Capability Negotiation Configuration Parameters ...20 7. Acknowledgments ................................................20 8. References .....................................................20 8.1. Normative References ......................................20 8.2. Informative References ....................................21 Garcia-Martin, et al. Standards Track [Page 2] RFC 7006 SDP Misc. Capabilities Negotiation September 2013 1. Introduction The Session Description Protocol (SDP) [RFC4566] is intended for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation. SDP has been extended with an SDP Capability Negotiation Mechanism Framework [RFC5939] that allows the endpoints to negotiate capabilities, such as support for the Real-timeShow full document text