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<title>OpenSLP Users Guide - The slp.conf File</title>
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<h2>The slp.conf File<br />
<span id="breadcrumbs"><a href="index.html">OpenSLP User's Guide</a> » Configuration » <a href="SlpConf.html">The slp.conf File</a></span></h2>
<p>The slp.conf file contains configuration information that affects the
operation of the OpenSLP daemon (slpd) and any application that uses the OpenSLP
library. The master slp.conf file is located at <tt>
/etc/slp.conf</tt>. There is <a href="CommandLine.html">command line
option</a> that forces slpd to read a different configuration file, but the SLP
library is hard coded to read from <tt>/etc/slp.conf</tt> and can only be
changed by re-compiling the library. </p>
<p>The OpenSLP slp.conf file diverges <i>slightly</i> from the <a
href="../../rfc/rfc2614.txt">RFC 2614</a> specification for the slp
configuration file, so you should probably read <a
href="#Divergence%20from%20RFC%202614">Divergence from RFC 2614</a> even if you
are familiar with the RFC spec.</p>
<h3>File Syntax</h3>
<p>The slp.conf file syntax is very simple. OpenSLP follows the
syntax specified in <a href="../../rfc/rfc2614.txt">RFC 2614</a>
which is simply a list of key/value pairs separated by
newlines; comment lines begin with a '#' or a ';'. A good
example file is copied to <tt>/etc/slp.conf</tt>
with the OpenSLP distribution. Take a look at it or
<a href="../../rfc/rfc2614.txt">read the RFC if you need more details</a>.</p>
<h3>Settings</h3>
<p>The following is a list of settings that are supported by OpenSLP:</p>
<p><b>net.slp.useScopes</b> </p>
<blockquote>This option is a comma delimited list of strings indicating the only
scopes a UA or SA is allowed when making requests or registering or the
scopes a DA must support. The default value is "DEFAULT".</blockquote>
<p><b>net.slp.DAAddresses</b></p>
<blockquote>Allows administrator to force UA and SA agents to use specific DAs.
If this setting is not used dynamic DA discovery will be used to determine
which DAs to use. Default is to use dynamic DA discovery.</blockquote>
<p><b>net.slp.interfaces</b></p>
<blockquote>
<p>A comma-separated list of interfaces (local IP addresses) that will be
used. This parameter is optional for the UA, but required for an SA or DA to
operate properly. Both IPv4 and IPv6 addresses may be specified. While
site-local and global IPv6 addresses are allowed, a DA or SA can only receive
IPv6 multicast on link-local addresses.</p>
</blockquote>
<p><b>net.slp.broadcastAddr</b></p>
<blockquote>
<p>This option is a string indicating the broadcast address to use when
sending broadcast packets. This parameter is only applicable when the other
broadcast configuration variables are set. The default value is
"255.255.255.255".</p>
</blockquote>
<p><b>net.slp.isBroadcastOnly</b> </p>
<blockquote>Force broadcasts to be used instead of multicast. This setting is
seldom necessary since OpenSLP will automatically use broadcast if multicast
is unavailable. Default is false.</blockquote>
<b>net.slp.passiveDADetection</b>
<blockquote>A boolean indicating whether passive DA detection should be used.
Default is true.</blockquote>
<b>net.slp.DAActiveDiscoveryInterval</b>
<blockquote>A 16 bit positive integer giving the number of seconds between DA
active discovery queries. Default is 900 seconds (15 minutes). If the
property is set to zero, active discovery is turned off. This is useful
when the DAs available are explicitly restricted to those obtained from DHCP
or the net.slp.DAAddresses property.</blockquote>
<b>net.slp.multicastTTL</b>
<blockquote>A positive integer that is less than or equal to 255. The default
is 255.</blockquote>
<b>net.slp.multicastMaximumWait</b>
<blockquote>An integer giving the maximum amount of time (in milliseconds) to
perform multicast requests. Default is 15000 ms or 15 secs.</blockquote>
<b>net.slp.unicastMaxi</b>mumWait
<blockquote>An integer giving the maximum amount of time (in milliseconds) to
perform unicast requests. Default is 15000 ms or 15 secs.</blockquote>
<b>net.slp.randomWaitBound</b>
<blockquote>An integer giving the maximum value for all random wait parameters.
Default is 1000 or 1 sec.</blockquote>
<b>net.slp.MTU</b>
<blockquote>A integer giving the network packet MTU in bytes. Default is 1400
bytes.</blockquote>
<b>net.slp.interfaces</b>
<blockquote>A list of IP address of network interfaces on which the DA/SA should
listen for slp requests. By default, OpenSLP will use all interfaces.</blockquote>
<b>net.slp.securityEnabled</b>
<blockquote>Indicates whether all agents should use authentication blocks.</blockquote>
<strong>net.slp.locale</strong>
<blockquote>A RFC 1766 Language Tag [6] for the language locale. Setting this
property causes the property value to become the default locale for SLP
messages. Default is "en". This property is also used for SA and DA
configuration.</blockquote>
<b>net.slp.maxResults</b>
<blockquote>A 32 bit integer giving the maximum number of results to accumulate
and return for a synchronous request before the timeout, or the maximum
number of results to return through a callback if the request results are
reported asynchronously.</blockquote>
<b>net.slp.isDA </b>
<blockquote>A boolean indicating if the SLP server is to act as a DA. If false,
not run as a DA. Default is false.</blockquote>
<b>net.slp.DAHeartBeat</b>
<blockquote>A 32 bit integer giving the number of seconds for the DA heartbeat.
Default is 3 hours (10800 seconds). Ignored if net.slp.isDA is false.</blockquote>
<b>net.slp.DAAttributes</b> (currently ignored)
<blockquote>
<p>A comma-separated list of parenthesized attribute/value list pairs that the
DA must advertise in DAAdverts. The property must be in the SLP
attribute list wire format, including escapes for reserved characters. [7]</p>
</blockquote>
<p><b>net.slp.useIPV4</b></p>
<blockquote>
<p>This parameter specifies whether or not IPv4 should be used for SLP. This
parameter defaults to true.</p>
</blockquote>
<p><b>net.slp.useIPV6</b></p>
<blockquote>
<p>This parameter specifies whether or not IPv6 should be used for SLP. This
parameter defaults to true.</p>
</blockquote>
<h3> <a name="Divergance from RFC 2614"></a>Divergence from RFC 2614</h3>
OpenSLP does not support all of the settings that are
specified by RFC 2614. The reasons for not supporting some
of the settings range from the implementors' opinions that
they are either not useful or very difficult to implement
with regard to their usefulness. The following is a list of
options that OpenSLP has no plans to support.
<p><b>net.slp.serializedRegURL</b> </p>
<blockquote>slpd accepts the [-r] command line parameter that specifies the
serialized registration file to use.</blockquote>
<b>net.slp.multicastTimeouts</b>
<blockquote>OpenSLP does not honor this parameter. Currently multicast timeouts
are generated internally based on the net.slp.multicastMaximumWait
parameter.</blockquote>
<b>net.slp.DADiscoveryTimeouts</b>
<blockquote>OpenSLP does not honor this parameter. Currently multicast timeouts
are generated internally based on the net.slp.multicastMaximumWait
parameter.</blockquote>
<b>net.slp.datagramTimeouts</b>
<blockquote>OpenSLP does not honor this parameter. Currently unicast timeouts
are generated internally based on the net.slp.unicastMaximumWait parameter.</blockquote>
<p id="breadcrumbs0">Prepared by: <a href="http://www.calderasystems.com">Caldera Systems Inc</a><br />
Maintained by: <a href="http://www.openslp.org/">openslp.org</a></p>
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