The Datagram Congestion Control Protocol (DCCP) Service Codes
RFC 5595
| Document | Type |
RFC - Proposed Standard
(September 2009; Errata)
Updated by RFC 6335
Updates RFC 4340
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-fairhurst-dccp-serv-codes | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5595 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Lars Eggert | ||
| Send notices to | (None) | ||
Network Working Group G. Fairhurst
Request for Comments: 5595 University of Aberdeen
Updates: 4340 September 2009
Category: Standards Track
The Datagram Congestion Control Protocol (DCCP) Service Codes
Abstract
This document describes the usage of Service Codes by the Datagram
Congestion Control Protocol, RFC 4340. It motivates the setting of a
Service Code by applications. Service Codes provide a method to
identify the intended service/application to process a DCCP
connection request. This provides improved flexibility in the use
and assignment of port numbers for connection multiplexing. The use
of a DCCP Service Code can also enable more explicit coordination of
services with middleboxes (e.g., network address translators and
firewalls). This document updates the specification provided in RFC
4340.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright and License Notice
Copyright (c) 2009 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 BSD License.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
Fairhurst Standards Track [Page 1]
RFC 5595 DCCP Service Codes September 2009
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Introduction ....................................................3
1.1. History ....................................................3
1.2. Conventions Used in This Document ..........................6
2. An Architecture for Service Codes ...............................6
2.1. IANA Port Numbers ..........................................6
2.2. DCCP Service Code Values ...................................7
2.2.1. New Versions of Applications or Protocols ...........8
2.3. Service Code Registry ......................................8
2.4. Zero Service Code ..........................................9
2.5. Invalid Service Code .......................................9
2.6. SDP for Describing Service Codes ...........................9
2.7. A Method to Hash the Service Code to a Dynamic Port ........9
3. Use of the DCCP Service Code ...................................10
3.1. Setting Service Codes at the Client .......................11
3.2. Using Service Codes in the Network ........................11
3.3. Using Service Codes at the Server .........................12
3.3.1. Reception of a DCCP-Request ........................13
3.3.2. Multiple Associations of a Service Code
with Ports .........................................14
3.3.3. Automatically Launching a Server ...................14
4. Security Considerations ........................................14
4.1. Server Port Number Reuse ..................................15
4.2. Association of Applications with Service Codes ............15
4.3. Interactions with IPsec ...................................15
5. IANA Considerations ............................................16
6. Acknowledgments ................................................16
7. References .....................................................17
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