Session Description Protocol (SDP) Offer/Answer Procedures for Stream Control Transmission Protocol (SCTP) over Datagram Transport Layer Security (DTLS) Transport
RFC 8841
Document | Type | RFC - Proposed Standard (January 2021; No errata) | |
---|---|---|---|
Authors | Christer Holmberg , Roman Shpount , Salvatore Loreto , Gonzalo Camarillo | ||
Last updated | 2021-01-18 | ||
Replaces | draft-loreto-mmusic-sctp-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 2017-01-12) | ||
IESG | IESG state | RFC 8841 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Ben Campbell | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) C. Holmberg Request for Comments: 8841 Ericsson Category: Standards Track R. Shpount ISSN: 2070-1721 TurboBridge S. Loreto G. Camarillo Ericsson January 2021 Session Description Protocol (SDP) Offer/Answer Procedures for Stream Control Transmission Protocol (SCTP) over Datagram Transport Layer Security (DTLS) Transport Abstract The Stream Control Transmission Protocol (SCTP) is a transport protocol used to establish associations between two endpoints. RFC 8261 specifies how SCTP can be used on top of the Datagram Transport Layer Security (DTLS) protocol, which is referred to as SCTP-over- DTLS. This specification defines the following new Session Description Protocol (SDP) protocol identifiers (proto values): "UDP/DTLS/SCTP" and "TCP/DTLS/SCTP". This specification also specifies how to use the new proto values with the SDP offer/answer mechanism for negotiating SCTP-over-DTLS associations. 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/rfc8841. 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. Table of Contents 1. Introduction 2. Conventions 3. SCTP Terminology 4. SDP Media Descriptions 4.1. General 4.2. Protocol Identifiers 4.3. Media-Format Management 4.4. Syntax 4.4.1. General 4.4.2. SDP Media Description Values 4.5. Example 5. SDP "sctp-port" Attribute 5.1. General 5.2. Syntax 5.3. Mux Category 6. SDP "max-message-size" Attribute 6.1. General 6.2. Syntax 6.3. Mux Category 7. UDP/DTLS/SCTP Transport Realization 8. TCP/DTLS/SCTP Transport Realization 9. Association and Connection Management 9.1. General 9.2. SDP "sendrecv"/"sendonly"/"recvonly"/"inactive" Attributes 9.3. SCTP Association 9.4. DTLS Association (UDP/DTLS/SCTP and TCP/DTLS/SCTP) 9.5. TCP Connection (TCP/DTLS/SCTP) 10. SDP Offer/Answer Procedures 10.1. General 10.2. Generating the Initial SDP Offer 10.3. Generating the SDP Answer 10.4. Offerer Processing of the SDP Answer 10.5. Modifying the Session 11. Multihoming Considerations 12. NAT Considerations 12.1. General 12.2. ICE Considerations 13. Examples 13.1. Establishment of UDP/DTLS/SCTP Association 14. Security Considerations 15. IANA Considerations 15.1. New SDP Proto Values 15.2. New SDP Attributes 15.2.1. sctp-port 15.2.2. max-message-size 15.3. association-usage Name Registry 16. References 16.1. Normative References 16.2. Informative References Acknowledgements Authors' Addresses 1. Introduction The Session Description Protocol (SDP) [RFC4566] provides a general- purpose format for describing multimedia sessions in announcements or invitations. "TCP-Based Media Transport in the Session Description Protocol (SDP)" [RFC4145] specifies a general mechanism for describing and establishing TCP [RFC0793] streams. "Connection- Oriented Media Transport over the Transport Layer Security (TLS) Protocol in the Session Description Protocol (SDP)" [RFC8122] extends [RFC4145] to describe TCP-based media streams that are protected using TLS. The Stream Control Transmission Protocol (SCTP) [RFC4960] is a reliable transport protocol used to transport data between twoShow full document text