Service Location Protocol Extensions, Version 2 (SLPv2)
-------------------------------------------------------

(last updated 2003-05-06)

See RFC 2608 for the specification of SLPv2 and how it can be
extended.

New SLP Extensions with types in the range 2-65535 may be
registered following review by a Designated Expert.  Please
submit new extension requests to iana&iana.org with
"SVRLOC-Extension Request" in the subject field.

The following is a list of current SLPv2 Extensions.


SLPv2 Extension ID Assignments

ID #    Extension Name                   Contact                Reference
------  --------------                   -------                ---------

0x0001  Attribute Missing                Erik Guttman           [RFC2609]
                                         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 associated with the 
        service type MAY send this
        extension to warn the message
        sender.

0x0002  Attribute List                   Erik Guttman           [RFC3059]
                                         erik.guttman&sun.com
        UAs may request and obtain
        attribute lists along with
        Service Replies.  

0x0003  Vendor Opaque                    Erik Guttman           [0x0003]
                                         erik.guttman&sun.com
        Vendors may attach specific
        extensions to SLP messages
        for their own purposes.

0x0004  Subscribe                        James Kempf            [RFC3082]
                                         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            [RFC3082]
                                         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            [RFC3528] 
                                         zwb&cs.columbia.edu
        DA mesh control messages are
        sent as extensions to DAAdvert
        messages between mesh-enhanced
        DAs.

0x4001  SLP Local Service                Matt Peterson          [AUTODE]
        Autoderegistration Extension     matt&caldera.com

        This extension effects SrvReg
        messages sent from a local SA
        client to a SA server (as 
        described by [rfc2614bis].  A
        process ID is included.  The
        SA will deregister the service
        if the process ID is no longer
        valid.

0x4002  Select                           Weibin Zhao            [RFC3421] 
                                         zwb&cs.columbia.edu
        UAs use this extension in a SrvRqst 
        to request DAs/SAs limit the maximum 
        number of URL entries in the corresponding 
        SrvRply.  DAs/SAs use this extension in a 
        SrvRply to inform UAs the total number of 
        matching URL entries. 

0x4003  Sort                             Weibin Zhao            [RFC3421] 
                                         zwb&cs.columbia.edu
        UAs use this extension in a SrvRqst 
        to request DAs/SAs sort the URL entries 
        in the corresponding SrvRply according to
        to the specified sort key list.
  
REFERENCES
----------

[AUTODE]   http://www.srvloc.org/autodereg-ext.txt

[RFC2608]  Guttman, E., Perkins, C., Veizades, J., Day, M., 
           "Service Location Protocol, Version 2", RFC 2608, 
           July 1999.

[RFC2609]  Guttman, E., Perkins, C. and J. Kempf, "Service 
           Templates and service: Schemes", RFC 2609, June 1999.

[RFC3059]  E. Guttman, "Attribute List Extension for the Service
           Location Protocol", RFC 3059, February 2001.

[RFC3082]  Kempf, J. and J. Goldschmidt, "Notification and
           Subscription for SLP", RFC 3082, March 2001.

[RFC3421]  W. Zhao, H. Schulzrinne, E. Guttman, C. Bisdikian, and
           W. Jerome, "Select and Sort Extensions for the Service
           Location Protocol (SLP)", RFC 3421,
           November 2002.

[0x0003]   draft-guttman-svrloc-vendor-ext-01.txt

[RFC3528]  W. Zhao, H. Schulzrinne, and E. Guttman, "Mesh-enhanced 
           Service Location Protocol", RFC 3528, April 2003.

[2614bis]  draft-kempf-svrloc-rfc2614-00.txt

(created 2000-10)

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