Service Location Working Group Erik Guttman
INTERNET DRAFT Sun Microsystems, Inc
11 October 1999
The Directory Agent Service Type
draft-guttman-svrloc-da-scheme-00.txt
Status of This Memo
This document is a submission by the Service Location Working Group
of the Internet Engineering Task Force (IETF). Comments should be
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all provisions of Section 10 of RFC 2026 [1].
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Abstract
This document describes the Directory Agent service type. Directory
Agents are one of three types of agents used in the Service Location
Protocol, Version 2 [1]. The Directory Agent caches services for a
set of Service Agents which have been enabled to use SLPv2. User
Agents issue requests of Directory Agents to discover services.
1. Introduction
This document provides a Service Template for SLPv2 Directory Agents.
Service templates are defined in [2].
SLPv2 may be used to discover Directory Agents. Directory Agents
respond with DAAdvert messages which include attributes. This
document describes the standard attributes which Directory Agents
MAY include in their DAAdverts.
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2. The Directory-Agent Service Type
-------------------------template begins here-----------------------
template-type=directory-agent
template-version=0.1
template-lang=en
template-description=
This defines the directory-agent service type. This service is
used by SLPv2 User Agents, who issue service discovery requests
and by SLPv2 Service Agents, who register their services with
the Directory Agent. The SLPv2 Directory Agent caches the service
information and provides scalability to the SLPv2 protocol. The
Directory Agent MAY include attribute information in its DAAdvert
messages. User Agents and Service Agents MAY also use attributes
to select Directory Agents, by issuing SLPv2 Directory Agent
discovery Service Requests messages which include a search filter.
template-url-syntax=
url-path= ; The URL of the service agent. Defined in [1].
min-refresh-interval=string L O
; The minimum lifetime the Directory Agent will accept in service
; registrations.
--------------------------template ends here------------------------
3. Security Considerations
Authentication of Directory Agent URLs is possible within the context
of SLPv2 [1]. Directory Agent URLs may be used by SLPv2 UAs and SAs.
If SLPv2 security mechanisms are not used, UAs and SAs will have no
guarantee these services actually conform to the selected subset.
References:
[1] E. Guttman, C. Perkins, J. Veizades, M. Day. Service Location
Protocol. RFC 2608, June 1999.
[2] E. Guttman, C. Perkins, J. Kempf, Service Templates and service:
Schemes. RFC 2609, June 1999.
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Author Contact Information:
Erik Guttman
Sun Microsystems
Bahnstr. 2
74915 Waibstadt Germany
Erik.Guttman@sun.com
+49 7263 911 701
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