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player-doc-3.0.2-5.fc14.noarch.rpm

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<h1>service_adv_mdns<br/>
<small>
[<a class="el" href="group__drivers.html">Drivers</a>]</small>
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<p>Multicast DNS service discovery.  
<a href="#_details">More...</a></p>
<table class="memberdecls">
</table>
<p>Multicast DNS service discovery. </p>
<p>This driver can be used to publish information about a Player TCP service using the proposed IETF standard for multicast DNS service discovery (MDNS-SD). MDNS-SD is a part of the <a href="http://www.zeroconf.org">Zeroconf</a> protocols, and has also been called "Rendezvous".</p>
<p>If you use this driver, it is assumed that the standard Player 2 TCP transport is being used; the MDNS-SD service type is "_player2._tcp". In addition to any "service_description" given in the configuration file (see below), any loaded device drivers will be represented in the service's TXT record. Each device will be entered into the TXT record as: <code>device=</code><em>name</em><code>#</code><em>number</em><code>(</code><em>driver name</em><code>)</code>.</p>
<p>The <a href="http://www.porchdogsoft.com/products/howl/">Howl</a> library is used for MDNS-SD and must be available for this driver to be compiled into the server.</p>
<p>This driver has no client proxy. When the driver is loaded and initialized, the service is published, and Howl responds to queries in a background thread. Clients may use Howl or any other MDNS-SD implementation to query and find services.</p>
<dl class="user"><dt><b>Compile-time dependencies</b></dt><dd></dd></dl>
<ul>
<li><a href="http://www.porchdogsoft.com/products/howl/">libhowl</a></li>
</ul>
<dl class="user"><dt><b>Provides</b></dt><dd></dd></dl>
<ul>
<li>none<ul>
<li>Note, however, that you must specify a "provides" field in the config file, anyway. Use "opaque".</li>
</ul>
</li>
</ul>
<dl class="user"><dt><b>Requires</b></dt><dd></dd></dl>
<ul>
<li>None</li>
</ul>
<dl class="user"><dt><b>Configuration requests</b></dt><dd></dd></dl>
<ul>
<li>none</li>
</ul>
<dl class="user"><dt><b>Configuration file options</b></dt><dd></dd></dl>
<ul>
<li>service_name (string)<ul>
<li>A short name for the service. If omitted, a default will be chosen based on the Player port number.</li>
</ul>
</li>
<li>service_description (string)<ul>
<li>A longer "description" for the robot, which will be included in the service TXT record.</li>
</ul>
</li>
<li>service_tags (tuple string)<ul>
<li>Tags to include in the service TXT record, in addition to device names.</li>
</ul>
</li>
</ul>
<dl class="user"><dt><b>Example</b></dt><dd></dd></dl>
<div class="fragment"><pre class="fragment">
driver
(
  name "service_adv_mdns"
  provides ["opaque:0"]
  service_name "robot"
  service_description "This is a groovy robot which can be controlled with Player."
  service_tags [ "job=mapper" "operator=reed" "strength=12" "dexterity=18" "intelligence=4" "thac0=8" ]
)
</pre></div><dl class="author"><dt><b>Author:</b></dt><dd>Reed Hedges &lt;<a href="mailto:reed@mobilerobots.com">reed@mobilerobots.com</a>&gt; </dd></dl>
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Last updated 12 September 2005 21:38:45
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