Network Working Group M. Tuexen Internet-Draft Muenster Univ. of Applied Sciences Updates: 4960 (if approved) R. Stewart Intended status: Standards Track Huawei Expires: March 11, 2011 September 7, 2010 Stream Control Transmission Protocol (SCTP) Chunk Flags Registration draft-ietf-tsvwg-sctp-chunk-flags-01.txt Abstract This document defines the procedure for registering chunk flags with the Internet Assigned Numbers Authority (IANA) for the Stream Control Transmission Protocol (SCTP). It updates RFC 4960, and also defines the IANA registry for contents for currently defined chunk types. It does not change SCTP in any other way. 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 Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on March 11, 2011. Copyright Notice Copyright (c) 2010 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 Tuexen & Stewart Expires March 11, 2011 [Page 1]
Internet-Draft SCTP Chunk Flags Registration September 2010 described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3 3.1. Updated IETF-Defined Chunk Extension . . . . . . . . . . . 3 3.2. New IETF Chunk Flags Registration . . . . . . . . . . . . . 4 3.3. Initial Registrations . . . . . . . . . . . . . . . . . . . 4 3.3.1. DATA Chunk Flags . . . . . . . . . . . . . . . . . . . 4 3.3.2. INIT Chunk Flags . . . . . . . . . . . . . . . . . . . 5 3.3.3. INIT ACK Chunk Flags . . . . . . . . . . . . . . . . . 5 3.3.4. SACK Chunk Flags . . . . . . . . . . . . . . . . . . . 5 3.3.5. HEARTBEAT Chunk Flags . . . . . . . . . . . . . . . . . 5 3.3.6. HEARTBEAT ACK Chunk Flags . . . . . . . . . . . . . . . 5 3.3.7. ABORT Chunk Flags . . . . . . . . . . . . . . . . . . . 5 3.3.8. SHUTDOWN Chunk Flags . . . . . . . . . . . . . . . . . 5 3.3.9. SHUTDOWN ACK Chunk Flags . . . . . . . . . . . . . . . 6 3.3.10. ERROR Chunk Flags . . . . . . . . . . . . . . . . . . . 6 3.3.11. COOKIE ECHO Chunk Flags . . . . . . . . . . . . . . . . 6 3.3.12. COOKIE ACK Chunk Flags . . . . . . . . . . . . . . . . 6 3.3.13. ECNE Chunk Flags . . . . . . . . . . . . . . . . . . . 6 3.3.14. CWR Chunk Flags . . . . . . . . . . . . . . . . . . . . 6 3.3.15. SHUTDOWN COMPLETE Chunk Flags . . . . . . . . . . . . . 6 3.3.16. AUTH Chunk Flags . . . . . . . . . . . . . . . . . . . 7 3.3.17. ASCONF ACK Chunk Flags . . . . . . . . . . . . . . . . 7 3.3.18. PAD Chunk Flags . . . . . . . . . . . . . . . . . . . . 7 3.3.19. FORWARD TSN Chunk Flags . . . . . . . . . . . . . . . . 7 3.3.20. ASCONF Chunk Flags . . . . . . . . . . . . . . . . . . 7 4. Security Considerations . . . . . . . . . . . . . . . . . . . . 7 5. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 7 6. Normative References . . . . . . . . . . . . . . . . . . . . . 7 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 8 Tuexen & Stewart Expires March 11, 2011 [Page 2]
Internet-Draft SCTP Chunk Flags Registration September 2010 1. Introduction [RFC4960], which currently defines the Stream Control Transmission Protocol (SCTP), provides a procedure to define new chunk types. However, several protocol extensions currently being discussed need to define new chunk flags for existing chunks. Without publication of this document, the only way to have done this would have been to obsolete [RFC4960], which is not appropriate. This document updates RFC 4960 to overcome this limitation. It defines the procedure to register chunk flags, and specifies the registry entries for for existing chunk types. The protocol is not changed in any other way. Therefore only Section 14.1 of [RFC4960] is affected. 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. IANA Considerations Section 3.1 describes the updated procedure for chunk type registration and replaces Section 14.1 of [RFC4960]. Section 3.2 adds a new procedure for chunk flag registration to the updated section 14.1 of [RFC4960]. IANA is requested to create an SCTP Chunk Flag registry. The initial contents of the registry should be assigned using the values specified in Section 3.3. 3.1. Updated IETF-Defined Chunk Extension The assignment of new chunk parameter type codes is done through an IETF Review action, as defined in [RFC5226]. Documentation of a new chunk MUST contain the following information: a) A long and short name for the new chunk type; b) A detailed description of the structure of the chunk, which MUST conform to the basic structure defined in section 3.2 of [RFC4960]; Tuexen & Stewart Expires March 11, 2011 [Page 3]
Internet-Draft SCTP Chunk Flags Registration September 2010 c) A detailed definition and description of intended use of each field within the chunk, including the chunk flags if any. Defined chunk flags will be used as initial entries in the chunk flags table for the new chunk type; d) A detailed procedural description of the use of the new chunk type within the operation of the protocol. The last chunk type (255) is reserved for future extension if necessary. IANA creates for each new chunk type a registration table for the chunk flags for this type. The procedure for registering particular chunk flags is described in the following Section 3.2. 3.2. New IETF Chunk Flags Registration The assignment of new chunk flags is done through an RFC required action, as defined in [RFC5226]. Documentation of the chunk flags MUST contain the following information: a) A name for the new chunk flag; b) A detailed procedural description of the use of the new chunk flag within the operation of the protocol. It MUST be considered that implementations not supporting the flag will just ignore it. IANA selects a chunk flags value. This must be one of 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, or 0x80, which MUST be unique within the chunk flag values for the specific chunk type. 3.3. Initial Registrations This section describes the initial values of the chunk flag tables, one table for each chunk. Most tables are currently empty. IANA is to use these value to create the new registry. 3.3.1. DATA Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ | 0x01 | E bit | [RFC4960] | | 0x02 | B bit | [RFC4960] | | 0x04 | U bit | [RFC4960] | +------------------+-----------------+-----------+ Tuexen & Stewart Expires March 11, 2011 [Page 4]
Internet-Draft SCTP Chunk Flags Registration September 2010 3.3.2. INIT Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.3. INIT ACK Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.4. SACK Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.5. HEARTBEAT Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.6. HEARTBEAT ACK Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.7. ABORT Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ | 0x01 | T bit | [RFC4960] | +------------------+-----------------+-----------+ 3.3.8. SHUTDOWN Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ Tuexen & Stewart Expires March 11, 2011 [Page 5]
Internet-Draft SCTP Chunk Flags Registration September 2010 3.3.9. SHUTDOWN ACK Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.10. ERROR Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.11. COOKIE ECHO Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.12. COOKIE ACK Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.13. ECNE Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.14. CWR Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.15. SHUTDOWN COMPLETE Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ | 0x01 | T bit | [RFC4960] | +------------------+-----------------+-----------+ Tuexen & Stewart Expires March 11, 2011 [Page 6]
Internet-Draft SCTP Chunk Flags Registration September 2010 3.3.16. AUTH Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.17. ASCONF ACK Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.18. PAD Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.19. FORWARD TSN Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 3.3.20. ASCONF Chunk Flags +------------------+-----------------+-----------+ | Chunk Flag Value | Chunk Flag Name | Reference | +------------------+-----------------+-----------+ 4. Security Considerations This document does not add any additional security considerations in addition to the ones given in [RFC4960]. 5. Acknowledgments The authors wish to thank Gorry Fairhurst, and Anna Brunstroem for their invaluable comments. 6. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. Tuexen & Stewart Expires March 11, 2011 [Page 7]
Internet-Draft SCTP Chunk Flags Registration September 2010 [RFC4960] Stewart, R., "Stream Control Transmission Protocol", RFC 4960, September 2007. [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 5226, May 2008. Authors' Addresses Michael Tuexen Muenster University of Applied Sciences Stegerwaldstr. 39 48565 Steinfurt DE Email: tuexen@fh-muenster.de Randall R. Stewart Huawei Chapin, SC 29036 US Email: rstewart@huawei.com Tuexen & Stewart Expires March 11, 2011 [Page 8]
