Internet Engineering Task Force Erik Guttman INTERNET DRAFT Sun Microsystems 20 June 2000 Expires in six months Service Location Protocol Extension Assignments Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Copyright (C) The Internet Society (2000). All Rights Reserved. Abstract SLPv2 [1] allows protocol extensions to be defined. Each must be assigned an extension ID. This document lists all extension IDs which have been assigned and describes the process by which further extension IDs may be acquired. Extension ID assignments SLPv2 [1] defines the mechanism by which new extension IDs are assigned to be Designated Expert. [2] I am currently that designated expert and I wanted to inform those implementing SLP as well as those involved in using it what the current assignments are as well as how to get more assignments in the future. Guttman Expires: 18 November 2000 [Page 1] Internet Draft SLPv2 Extension Assignments June 2000 Notation 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 RFC 2119 [3]. Current Assignments 0x0001 SLPv2 [1] defines the 'Attribute Missing Extension. This extension is used to help SAs and UAs issue messages which conform to Service Templates [4]. 0x0002 The Attribute List Extension [5] is an optimization which allows UAs to obtain attribute lists with Service Reply messages. That way they don't have to issue a second message to obtain them. 0x0003 The Vendor Opaque Extension [6] provides a simple hook for vendors to extend SLP in a standard and interoperable way. 0x0004 The Subscribe Extension [7] allows to UAs request that DAs inform them when services of a particular service type and scope appear or disappear. 0x0005 The NotifyAt Extension [7] is used by DAs inform SAs and UAs of what service types and scopes to multicast notifications for, and which multicast groups to use. 0x0006 The Mesh-enhancement extension [8] is used by DAs to send mesh control messages as extensions to DAAdvert messages. Future Assignments When internet drafts containing new SLPv2 extensions appear, the new extension ID is listed as TBD (To Be Determined). The new extension is assigned by the Designated Expert for SLPv2 extensions: [1] New SLP Extensions with types in the range 2-65535 may be registered following review by a Designated Expert. The designated expert requests that IANA post a registration of the extension ID number for the desired purpose. The current list of SLPv2 extension IDs is maintained by IANA. In principal, IDs are assigned to every well specified protocol which requires one. The decision is left to the discretion of the Designated Expert. Guttman Expires: 18 November 2000 [Page 2] Internet Draft SLPv2 Extension Assignments June 2000 IANA Considerations IANA will maintain a file called: ftp://ftp.isi.edu/in-notes/iana/assignments/svrloc-extensions The contents of this file will be managed by the SLPv2 extension Designated Expert. He or she will send IANA specific requests to update the file. The current contents of the file would be the following: ----------------------------------------------------------------- SLPv2 Extension ID assignments. See RFC 2608 for the specification of SLPv2 and how it can be extended. The current 'Designated Expert' for submission of SLPv2 Extensions is Erik Guttman ID # Extension Name Contact 0x0001 Attribute Missing Erik Guttman erik.guttman@sun.com SAs or DAs which receive a SrvReg or SrvRqst which omits an attribute which is marked 'required' in the Service Template [4] associated with the service type MAY send this extension to warn the message sender. 0x0002 Attribute List Erik Guttman erik.guttman@sun.com UAs may request and obtain attribute lists along with Service Replies. 0x0003 Vendor Opaque Erik Guttman erik.guttman@sun.com Vendors may attach specific extensions to SLP messages for their own purposes. Guttman Expires: 20 December 2000 [Page 3] Internet Draft SLPv2 Extension Assignments June 2000 0x0004 Subscribe James Kempf james.kempf@sun.com UAs request DAs inform them when services of a particular service type and scope appear or disappear. 0x0005 NotifyAt James Kempf james.kempf@sun.com DAs inform SAs what service types and scopes to multicast notifications for, and which multicast groups to use. 0x0006 Mesh-enhancement Weibin Zhao zwb@cs.columbia.edu DA mesh control messages are sent as extensions to DAAdvert messages between mesh-enhanced DAs. ----------------------------------------------------------------- Security Considerations This memo concerns IANA registration of network parameters. It has no security implications. References [1] Guttman, E., Perkins, C., Veizades, J., Day, M., "Service Location Protocol, Version 2", RFC 2608, July 1999. [2] T. Narten, H. Alvestrand. Guidelines for Writing an IANA Considerations Section in RFCs. RFC 2434, October 1998. [3] Bradner, S., "Key Words for Use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [4] Guttman, E., Perkins, C. and J. Kempf, "Service Templates and service: Schemes", RFC 2609, June 1999. [5] Guttman, E., "Attribute List Extension for the Service Location Protocol", draft-guttman-svrloc-attrlist-ext-02.txt, March 1999, a work in progress. Guttman Expires: 20 December 2000 [Page 4] Internet Draft SLPv2 Extension Assignments June 2000 [6] Guttman, E., "Vendor Extensions for Service Location Protocol, Version 2", draft-guttman-svrloc-vendor-ext-01.txt, March 1999, A work in progress. [7] Kempf, J., Goldschmidt, J., "Notification and Subscription for SLP", draft-kempf-srvloc-notify-03.txt, January 2000, A work in progress. [8] Zhao, W., Schulzrinne, H., Guttman, E., "mSLP - Mesh-enhanced Service Location Protocol", draft-zhao-slp-da-interaction-06.txt, June 2000, A work in progress. Author's Contact Information Erik Guttman Network and Security Research Center, Sun Laboratories Sun Microsystems, Inc. Eichhoelzelstr. 7 74915 Waibstadt Germany Phone: +49 172 865 5497 Fax: +49 7263 911 701 Email: Erik.Guttman@Sun.Com Full Copyright Statement Copyright (C) The Internet Society (2000). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE." Guttman Expires: 20 December 2000 [Page 5]