Internet DRAFT - draft-guttman-svrloc-ext-ids
draft-guttman-svrloc-ext-ids
Internet Engineering Task Force Erik Guttman
INTERNET DRAFT Sun Microsystems
20 June 2000
Expires in six months
Service Location Protocol Extension Assignments
<draft-guttman-svrloc-ext-ids-00.txt>
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026.
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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.
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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.
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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 <erik.guttman@sun.com>
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.
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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.
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[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
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Guttman Expires: 20 December 2000 [Page 5]
