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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
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   <title>OpenSLP - Static Registration File</title>
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<body text="#000000" bgcolor="#FFFFFF" link="#0000EE" vlink="#551A8B" alink="#FF0000">

<h2>
The Static Registration File</h2>

<hr WIDTH="100%">
<p>Often it will be very useful for OpenSLP users to be able to statically
register legacy services (applications that were not compiled to use the
SLP library).&nbsp; To accommodate this need <a href="../../rfc/rfc2614.txt">RFC
2614</a> specifies a syntax for a registration file that is read by the
OpenSLP daemon (slpd).&nbsp; All of the registrations from the registration
file are maintained by slpd and will remain registered as long as slpd
is alive.&nbsp; The default location for the registration can be changed
from <tt>/etc/slp.reg
</tt>to another location using the <a href="CommandLine.html">-r
command line option</a><tt>.&nbsp; slpd reads the slp.reg </tt>file on
startup and re-reads it when ever the SIGHUP signal is received.
<h3>
<tt>Syntax</tt></h3>
The registration file format is pretty easy to understand.&nbsp; It can
get complicated so if you have any questions after reading this please
consult <a href="../../rfc/rfc2614.txt">RFC 2614.</a>
Each registration consists of several lines with the following format:
<br>&nbsp;
<blockquote><b><tt>#comment</tt></b>
<br><b><tt>;comment</tt></b>
<br><b><tt>service-url,language-tag,lifetime,[service-type]&lt;newline></tt></b>
<br><b><tt>"scopes="[scope-list]&lt;newline></tt></b>
<br><b><tt>[attrid]"="val1&lt;newline></tt></b>
<br><b><tt>[attrid]"="val1,val2,val3&lt;newline></tt></b>
<br><b><tt>&lt;newline></tt></b></blockquote>

<p><br><b><tt>service-url</tt></b>
<blockquote>(Required) The service-url which must follow the Service URL
syntax explained <a href="#Service URL Syntax">below</a>.</blockquote>
<b><tt>language-tag</tt></b>
<blockquote>(Required) The language-tag uses the (two character) language
tags as specified by <a href="../../rfc/rfc1766.txt">RFC
1766</a> ("en" "fr", "de", etc...)</blockquote>
<b><tt>lifetime</tt></b>
<blockquote>(Required) The lifetime of the registration in seconds.&nbsp;
Value must be between 0 and 65535.&nbsp; Use 65535 if you want the registration
to be maintained for the life of slpd.</blockquote>
<b><tt>service-type</tt></b>
<blockquote>(Optional) The type of service being registered.&nbsp; Ignored
by OpenSLP because service-url must conform to the SLP Service URL format.</blockquote>
<b><tt>scope-list</tt></b>
<blockquote>(Optional) List of comma delimited scopes to register the service
in.&nbsp; If omitted then service is registered in all scopes specified
by the <tt><a href="SlpConf.html">slp.conf</a></tt>
file.</blockquote>
<b><tt>attrs</tt></b>
<blockquote>(Optional) The attributes to register along with the service.&nbsp;
Any string but "scopes" or "SCOPES" can be used as an attrid.&nbsp; Note
that the '"' character has no real significance.&nbsp; Strings should not be
quoted!</blockquote>

<h3>
Examples</h3>
Several examples of registration entries are provided below:
<br>&nbsp;
<blockquote><tt>#Register a OpenSLP testing service</tt>
<br><tt>service:test.openslp://192.168.100.1,en,65535</tt>
<br><tt>scopes=test1,test2</tt>
<br><tt>description=OpenSLP Testing Service</tt>
<br><tt>authors=mpeterson,jcarey</tt>
<p><tt>#Register ssh service</tt>
<br><tt>service:ssh.openslp://192.168.100.1,en,65535</tt>
<br><tt>#use default scopes</tt>
<br><tt>description=Secure Shell</tt>
<p><tt>#Register telnet service with no attributes</tt>
<br><tt>service:telnet.myorg://192.168.100.1,en,65535</tt>
<br><tt>#use default scopes</tt></blockquote>

<h3>
<a NAME="Service URL Syntax"></a>Service URL Syntax</h3>
If you decide to use Service URLs extensively, you should probably
read <a href="../../rfc/rfc2609.txt">RFC 2609</a>,
but if you just want to know what they look like, the following explanation
should be good enough:
<blockquote><tt>service-url = "service:"&lt;service-type>"://"&lt;addrspec></tt></blockquote>
The service-type is a service type as explained <a href="#SLP Service Type Syntax">below</a>.
addrspec can be just about anything you want that fits URL syntax (see
<a href="../../rfc/rfc2396.txt">RFC 2396</a>) and can be translated as a network location.&nbsp; The "<tt>service:</tt>"
and "<tt>://</tt>" strings are required.

<p><b>Service URL Examples</b>
<p><tt>service:weather.nasa:wtp://weather.nasa.com:12000</tt>
<br><tt>service:weather.nasa:swtp://weather.nasa.com:12001</tt>
<br><tt>service:chat.superchat://chat.superchat.com;auth=ldap</tt>
<br>&nbsp;
<h3>
<a NAME="SLP Service Type Syntax"></a>SLP Service Type Syntax</h3>
The official definition of Service Type strings can be found in 
<a href="../../rfc/rfc2609.txt">RFC 2609</a>, 
"Service Templates and Service Schemes".&nbsp; If you will be
working with "well known" (IANA) service types, you should read it.&nbsp;
If you are developing applications for "proprietary" services then you
will probably be satisfied with the following explanation:
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <tt>service-type = &lt;abstract-type.naming-authority>":"&lt;concrete-type></tt>
<p>The abstract-type is simple (hopefully short) descriptive string that
describes the type of service.&nbsp; The naming-authority is the name (hopefully
unique) name of the organization that named the service.&nbsp; The naming-authority
is optional, but if it is omitted then IANA is assumed to be the naming
authority and IANA requires service-types to be registered 
(see <a href="../../rfc/rfc2609.txt">RFC 2609</a>).&nbsp; The 
concrete-type is also optional.&nbsp; Think of a concrete-type
as a kind of sub-type of the abstract-type.&nbsp; For example, "printer"
is an abstract type (owned by IANA) and "printer:lpr" is a concrete type
(owned by IANA).
<p><b>Service Type Examples</b>
<p><tt>weather.nasa:wtp</tt>&nbsp; - A (fictitious) weather service type
owned by NASA that uses Weather Transfer protocol
<br>weather.nasa:swtp - A (fictitious) weather service type owned by NASA
that uses Simple Weather Transfer protocol.
<br><tt>chat.superchat</tt> - A chat service type owned by SuperChat
<br><tt>printer.samba</tt> - A samba printer service type
<br><tt>ftp</tt> - An IANA ftp service type
<br><tt>telnet</tt> - An IANA telnet service type
<br>&nbsp;
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