DTLS Encapsulation of SCTP Packets
draft-ietf-tsvwg-sctp-dtls-encaps-01

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Document Type Active Internet-Draft (tsvwg WG)
Last updated 2013-07-15
Replaces draft-tuexen-tsvwg-sctp-dtls-encaps
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Network Working Group                                           R. Jesup
Internet-Draft                                  WorldGate Communications
Intended status: Standards Track                               S. Loreto
Expires: January 16, 2014                                       Ericsson
                                                              R. Stewart
                                                          Adara Networks
                                                               M. Tuexen
                                        Muenster Univ. of Appl. Sciences
                                                           July 15, 2013

                   DTLS Encapsulation of SCTP Packets
                draft-ietf-tsvwg-sctp-dtls-encaps-01.txt

Abstract

   The Stream Control Transmission Protocol (SCTP) is a transport
   protocol originally defined to run on top of the network protocols
   IPv4 or IPv6.  This document specifies how SCTP can be used on top of
   the Datagram Transport Layer Security (DTLS) protocol.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on January 16, 2014.

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

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   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
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Encapsulation and Decapsulation Procedure . . . . . . . . . .   3
   4.  DTLS Considerations . . . . . . . . . . . . . . . . . . . . .   3
   5.  SCTP Considerations . . . . . . . . . . . . . . . . . . . . .   3
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   5
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

1.1.  Overview

   The Stream Control Transmission Protocol (SCTP) as defined in
   [RFC4960] is a transport protocol running on top of the network
   protocols IPv4 or IPv6.  This document specifies how SCTP is used on
   top of the Datagram Transport Layer Security (DTLS) protocol.  This
   encapsulation is used for example within the RTCWeb protocol suite
   (see [I-D.ietf-rtcweb-overview] for an overview) for transporting
   non-media data between browsers.  The architecture of this stack is
   described in [I-D.ietf-rtcweb-data-channel].

1.2.  Terminology

   This document uses the following terms:

   Association:  An SCTP association.

   Stream:  A unidirectional stream of an SCTP association.  It is
      uniquely identified by a stream identifier.

1.3.  Abbreviations

   DTLS:  Datagram Transport Layer Security.

   MTU:  Maximum Transmission Unit.

   PPID:  Payload Protocol Identifier.

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   SCTP:  Stream Control Transmission Protocol.

   TCP:  Transmission Control Protocol.

   TLS:  Transport Layer Security.

2.  Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

3.  Encapsulation and Decapsulation Procedure

   When an SCTP packet is sent down to the DTLS layer, the complete SCTP
   packet, consisting of the SCTP common header and a number of SCTP
   chunks, MUST be handled as the payload of the application layer
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