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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+ "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+
+<head>
+<meta name="description" content="LuaSocket: DNS support">
+<meta name="keywords" content="Lua, LuaSocket, DNS, Network, Library, Support">
+<title>LuaSocket: DNS support</title>
+<link rel="stylesheet" href="reference.css" type="text/css">
+</head>
+
+<body>
+
+<!-- header +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<div class=header>
+<hr>
+<center>
+<table summary="LuaSocket logo">
+<tr><td align=center><a href="http://www.lua.org">
+<img width=128 height=128 border=0 alt="LuaSocket" src="luasocket.png">
+</a></td></tr>
+<tr><td align=center valign=top>Network support for the Lua language
+</td></tr>
+</table>
+<p class=bar>
+<a href="home.html">home</a> &middot;
+<a href="home.html#download">download</a> &middot;
+<a href="installation.html">installation</a> &middot;
+<a href="introduction.html">introduction</a> &middot;
+<a href="reference.html">reference</a>
+</p>
+</center>
+<hr>
+</div>
+
+<!-- dns ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<h2 id=dns>DNS</h2>
+
+<p>
+Name resolution functions return <em>all</em> information obtained from the
+resolver in a table of the form:
+</p>
+
+<blockquote><tt>
+resolved = {<br>
+&nbsp;&nbsp;name = <i>canonic-name</i>,<br>
+&nbsp;&nbsp;alias = <i>alias-list</i>,<br>
+&nbsp;&nbsp;ip = <i>ip-address-list</i><br>
+}
+</tt> </blockquote>
+
+<p>
+Note that the <tt>alias</tt> list can be empty.
+</p>
+
+<!-- gethostname ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<p class=name id=gethostname>
+socket.dns.<b>gethostname()</b>
+</p>
+
+<p class=description>
+Returns the standard host name for the machine as a string.
+</p>
+
+<!-- tohostname +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<p class=name id=tohostname>
+socket.dns.<b>tohostname(</b>address<b>)</b>
+</p>
+
+<p class=description>
+Converts from IP address to host name.
+</p>
+
+<p class=parameters>
+<tt>Address</tt> can be an IP address or host name.
+</p>
+
+<p class=return>
+The function returns a string with the canonic host name of the given
+<tt>address</tt>, followed by a table with all information returned by
+the resolver. In case of error, the function returns <b><tt>nil</tt></b>
+followed by an error message.
+</p>
+
+<!-- toip +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<p class=name id=toip>
+socket.dns.<b>toip(</b>address<b>)</b>
+</p>
+
+<p class=description>
+Converts from host name to IP address.
+</p>
+
+<p class=parameters>
+<tt>Address</tt> can be an IP address or host name.
+</p>
+
+<p class=return>
+Returns a string with the first IP address found for <tt>address</tt>,
+followed by a table with all information returned by the resolver.
+In case of error, the function returns <b><tt>nil</tt></b> followed by an error
+message.
+</p>
+
+<!-- footer +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<div class=footer>
+<hr>
+<center>
+<p class=bar>
+<a href="home.html">home</a> &middot;
+<a href="home.html#down">download</a> &middot;
+<a href="installation.html">installation</a> &middot;
+<a href="introduction.html">introduction</a> &middot;
+<a href="reference.html">reference</a>
+</p>
+<p>
+<small>
+Last modified by Diego Nehab on <br>
+Thu Apr 20 00:25:07 EDT 2006
+</small>
+</p>
+</center>
+</div>
+
+</body>
+</html>