DCCP-UDP: A Datagram Congestion Control Protocol UDP Encapsulation for NAT Traversal
RFC 6773
Document | Type | RFC - Proposed Standard (November 2012; Errata) | |
---|---|---|---|
Authors | Thomas Phelan , Gorry Fairhurst , Colin Perkins | ||
Last updated | 2020-01-21 | ||
Replaces | draft-phelan-dccp-natencap | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized with errata bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6773 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Wesley Eddy | ||
IESG note | Pasi Sarolahti (pasi.sarolahti@iki.fi) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) T. Phelan Request for Comments: 6773 Sonus Updates: 4340, 5762 G. Fairhurst Category: Standards Track University of Aberdeen ISSN: 2070-1721 C. Perkins University of Glasgow November 2012 DCCP-UDP: A Datagram Congestion Control Protocol UDP Encapsulation for NAT Traversal Abstract This document specifies an alternative encapsulation of the Datagram Congestion Control Protocol (DCCP), referred to as DCCP-UDP. This encapsulation allows DCCP to be carried through the current generation of Network Address Translation (NAT) middleboxes without modification of those middleboxes. This document also updates the Session Description Protocol (SDP) information for DCCP defined in RFC 5762. 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/rfc6773. Phelan, et al. Standards Track [Page 1] RFC 6773 DCCP-UDP Encapsulation November 2012 Copyright Notice Copyright (c) 2012 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. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. DCCP-UDP . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.1. The UDP Header . . . . . . . . . . . . . . . . . . . . . . 5 3.2. The DCCP Generic Header . . . . . . . . . . . . . . . . . 5 3.3. DCCP-UDP Checksum Procedures . . . . . . . . . . . . . . . 6 3.3.1. Partial Checksums and the Minimum Checksum Coverage Feature . . . . . . . . . . . . . . . . . . . 7 3.4. Network-Layer Options . . . . . . . . . . . . . . . . . . 8 3.5. Explicit Congestion Notification . . . . . . . . . . . . . 8 3.6. ICMP Handling for Messages Relating to DCCP-UDP . . . . . 8 3.7. Path Maximum Transmission Unit Discovery . . . . . . . . . 9 3.8. Usage of the UDP Port by DCCP-UDP . . . . . . . . . . . . 9 3.9. Service Codes and the DCCP Port Registry . . . . . . . . . 11 4. DCCP-UDP and Higher-Layer Protocols . . . . . . . . . . . . . 11 5.1. Protocol Identification . . . . . . . . . . . . . . . . . 12 5.2. Signalling Encapsulated DCCP Ports . . . . . . . . . . . . 13 5.3. Connection Management . . . . . . . . . . . . . . . . . . 14 5.4. Negotiating the DCCP-UDP Encapsulation versus Native DCCP . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.5. Example of SDP Use . . . . . . . . . . . . . . . . . . . . 15 6. Security Considerations . . . . . . . . . . . . . . . . . . . 16 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17 7.1. UDP Port Allocation . . . . . . . . . . . . . . . . . . . 17 7.2. DCCP Reset . . . . . . . . . . . . . . . . . . . . . . . . 17 7.3. SDP Attribute Allocation . . . . . . . . . . . . . . . . . 17 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 18 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18 9.1. Normative References . . . . . . . . . . . . . . . . . . . 18 9.2. Informative References . . . . . . . . . . . . . . . . . . 18 Phelan, et al. Standards Track [Page 2] RFC 6773 DCCP-UDP Encapsulation November 2012 1. Introduction The Datagram Congestion Control Protocol (DCCP) [RFC4340] is a transport-layer protocol that provides upper layers with the abilityShow full document text