UDP Encapsulation of Stream Control Transmission Protocol (SCTP) Packets for End-Host to End-Host Communication
RFC 6951
Document | Type |
RFC - Proposed Standard
(May 2013; No errata)
Updated by RFC 8899
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Authors | Michael Tüxen , Randall Stewart | ||
Last updated | 2018-12-20 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6951 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Martin Stiemerling | ||
IESG note | Gorry Fairhurst (gorry@erg.abdn.ac.uk) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) M. Tuexen Request for Comments: 6951 Muenster Univ. of Appl. Sciences Category: Standards Track R. Stewart ISSN: 2070-1721 Adara Networks May 2013 UDP Encapsulation of Stream Control Transmission Protocol (SCTP) Packets for End-Host to End-Host Communication Abstract This document describes a simple method of encapsulating Stream Control Transmission Protocol (SCTP) packets into UDP packets and its limitations. This allows the usage of SCTP in networks with legacy NATs that do not support SCTP. It can also be used to implement SCTP on hosts without directly accessing the IP layer, for example, implementing it as part of the application without requiring special privileges. Please note that this document only describes the functionality required within an SCTP stack to add on UDP encapsulation, providing only those mechanisms for two end-hosts to communicate with each other over UDP ports. In particular, it does not provide mechanisms to determine whether UDP encapsulation is being used by the peer, nor the mechanisms for determining which remote UDP port number can be used. These functions are out of scope for this document. This document covers only end-hosts and not tunneling (egress or ingress) endpoints. 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/rfc6951. Tuexen & Stewart Standards Track [Page 1] RFC 6951 UDP Encapsulation of SCTP Packets May 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 . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1. Portable SCTP Implementations . . . . . . . . . . . . . . 3 3.2. Legacy NAT Traversal . . . . . . . . . . . . . . . . . . 4 4. Unilateral Self-Address Fixing (UNSAF) Considerations . . . . 4 5. SCTP over UDP . . . . . . . . . . . . . . . . . . . . . . . . 4 5.1. Architectural Considerations . . . . . . . . . . . . . . 4 5.2. Packet Format . . . . . . . . . . . . . . . . . . . . . . 5 5.3. Encapsulation Procedure . . . . . . . . . . . . . . . . . 6 5.4. Decapsulation Procedure . . . . . . . . . . . . . . . . . 7 5.5. ICMP Considerations . . . . . . . . . . . . . . . . . . . 7 5.6. Path MTU Considerations . . . . . . . . . . . . . . . . . 7 5.7. Handling of Embedded IP Addresses . . . . . . . . . . . . 8 5.8. Explicit Congestion Notification (ECN) Considerations . . 8 6. Socket API Considerations . . . . . . . . . . . . . . . . . . 8 6.1. Get or Set the Remote UDP Encapsulation Port Number (SCTP_REMOTE_UDP_ENCAPS_PORT) . . . . . . . . . . . . . . 9 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9 8. Security Considerations . . . . . . . . . . . . . . . . . . . 9 9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 10 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 10 10.1. Normative References . . . . . . . . . . . . . . . . . . 10 10.2. Informative References . . . . . . . . . . . . . . . . . 11 Tuexen & Stewart Standards Track [Page 2] RFC 6951 UDP Encapsulation of SCTP Packets May 2013 1. Introduction This document describes a simple method of encapsulating SCTP packets into UDP packets. SCTP, as defined in [RFC4960], runs directly overShow full document text