Datagram Congestion Control Protocol (DCCP) Encapsulation for NAT Traversal (DCCP-UDP)
draft-ietf-dccp-udpencap-10

The information below is for an old version of the document
Document Type Active Internet-Draft (dccp WG)
Last updated 2012-06-07 (latest revision 2012-03-26)
Replaces draft-phelan-dccp-natencap
Stream IETF
Intended RFC status Proposed Standard
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IESG IESG state IESG Evaluation::Revised I-D Needed
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Needs a YES. Needs 5 more YES or NO OBJECTION positions to pass.
Responsible AD Wesley Eddy
IESG note Pasi Sarolahti (pasi.sarolahti@iki.fi) is the document shepherd.
Send notices to dccp-chairs@tools.ietf.org, draft-ietf-dccp-udpencap@tools.ietf.org
DCCP Working Group                                             T. Phelan
Internet-Draft                                                     Sonus
Intended status: Standards Track                            G. Fairhurst
Expires: September 27, 2012                       University of Aberdeen
                                                              C. Perkins
                                                   University of Glasgow
                                                          March 26, 2012

   Datagram Congestion Control Protocol (DCCP) Encapsulation for NAT
                          Traversal (DCCP-UDP)
                      draft-ietf-dccp-udpencap-10

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
   SDP information for DCCP defined in RFC 5762.

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 September 27, 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

Phelan, et al.         Expires September 27, 2012               [Page 1]
Internet-Draft           DCCP-UDP Encapsulation               March 2012

   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  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  DCCP-UDP . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
     3.1.  The UDP Header . . . . . . . . . . . . . . . . . . . . . .  4
     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  . . . . . . . . . . . . . . . . . .  7
     3.5.  Explicit Congestion Notification . . . . . . . . . . . . .  7
     3.6.  ICMP handling for messages relating to DCCP-UDP  . . . . .  8
     3.7.  Path Maximum Transmission Unit Discovery . . . . . . . . .  8
     3.8.  Usage of the UDP port by DCCP-UDP  . . . . . . . . . . . .  8
     3.9.  Service Codes and the DCCP Port Registry . . . . . . . . . 10
   4.  DCCP-UDP and Higher-Layer Protocols  . . . . . . . . . . . . . 10
     5.1.  Protocol Identification  . . . . . . . . . . . . . . . . . 11
     5.2.  Signalling Encapsulated DCCP Ports . . . . . . . . . . . . 12
     5.3.  Connection Management  . . . . . . . . . . . . . . . . . . 13
     5.4.  Negotiating the DCCP-UDP encapsulation versus native
           DCCP . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     5.5.  Example of SDP use . . . . . . . . . . . . . . . . . . . . 14
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 15
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 15
     7.1.  UDP Port Allocation  . . . . . . . . . . . . . . . . . . . 15
     7.2.  DCCP Reset . . . . . . . . . . . . . . . . . . . . . . . . 15
     7.3.  SDP Attribute Allocation . . . . . . . . . . . . . . . . . 16
   8.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 16
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 16
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 17
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