Session Description Protocol (SDP) Offer/Answer Procedures for Interactive Connectivity Establishment (ICE)
RFC 8839
- Versions
- 00
- 01
- 02
- 03
- 04
- 05
- 06
- 07
- 08
- 09
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
Document | Type | RFC - Proposed Standard (January 2021; No errata) | |
---|---|---|---|
Authors | Marc Petit-Huguenin , Suhas Nandakumar , Christer Holmberg , Ari Keränen , Roman Shpount | ||
Last updated | 2021-01-18 | ||
Replaces | draft-petithuguenin-mmusic-ice-sip-sdp | ||
Stream | IETF | ||
Formats | plain text html xml pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Flemming Andreasen | ||
Shepherd write-up | Show (last changed 2019-06-06) | ||
IESG | IESG state | RFC 8839 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Adam Roach | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) M. Petit-Huguenin Request for Comments: 8839 Impedance Mismatch Obsoletes: 5245, 6336 S. Nandakumar Category: Standards Track Cisco Systems ISSN: 2070-1721 C. Holmberg A. Keränen Ericsson R. Shpount TurboBridge January 2021 Session Description Protocol (SDP) Offer/Answer Procedures for Interactive Connectivity Establishment (ICE) Abstract This document describes Session Description Protocol (SDP) Offer/ Answer procedures for carrying out Interactive Connectivity Establishment (ICE) between the agents. This document obsoletes RFCs 5245 and 6336. 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 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8839. Copyright Notice Copyright (c) 2021 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 (https://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. 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 2. Conventions 3. Terminology 4. SDP Offer/Answer Procedures 4.1. Introduction 4.2. Generic Procedures 4.2.1. Encoding 4.2.2. RTP/RTCP Considerations 4.2.3. Determining Role 4.2.4. STUN Considerations 4.2.5. Verifying ICE Support Procedures 4.2.6. SDP Example 4.3. Initial Offer/Answer Exchange 4.3.1. Sending the Initial Offer 4.3.2. Sending the Initial Answer 4.3.3. Receiving the Initial Answer 4.3.4. Concluding ICE 4.4. Subsequent Offer/Answer Exchanges 4.4.1. Sending Subsequent Offer 4.4.2. Sending Subsequent Answer 4.4.3. Receiving Answer for a Subsequent Offer 5. Grammar 5.1. "candidate" Attribute 5.2. "remote-candidates" Attribute 5.3. "ice-lite" and "ice-mismatch" Attributes 5.4. "ice-ufrag" and "ice-pwd" Attributes 5.5. "ice-pacing" Attribute 5.6. "ice-options" Attribute 6. Keepalives 7. SIP Considerations 7.1. Latency Guidelines 7.1.1. Offer in INVITE 7.1.2. Offer in Response 7.2. SIP Option Tags and Media Feature Tags 7.3. Interactions with Forking 7.4. Interactions with Preconditions 7.5. Interactions with Third Party Call Control 8. Interactions with Application Layer Gateways and SIP 9. Security Considerations 9.1. IP Address Privacy 9.2. Attacks on the Offer/Answer Exchanges 9.3. The Voice Hammer Attack 10. IANA Considerations 10.1. SDP Attributes 10.1.1. "candidate" Attribute 10.1.2. "remote-candidates" Attribute 10.1.3. "ice-lite" Attribute 10.1.4. "ice-mismatch" Attribute 10.1.5. "ice-pwd" Attribute 10.1.6. "ice-ufrag" Attribute 10.1.7. "ice-options" Attribute 10.1.8. "ice-pacing" Attribute 10.2. Interactive Connectivity Establishment (ICE) OptionsShow full document text