irc/doc/luasocket/dns.html
2012-12-01 01:06:15 -02:00

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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<head>
<meta name="description" content="LuaSocket: DNS support">
<meta name="keywords" content="Lua, LuaSocket, DNS, Network, Library, Support">
<title>LuaSocket: DNS support</title>
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<body>
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<tr><td align=center><a href="http://www.lua.org">
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<tr><td align=center valign=top>Network support for the Lua language
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<!-- 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>
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<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.
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<small>
Last modified by Diego Nehab on <br>
Mon Nov 21 01:56:09 EST 2005
</small>
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