mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-07-01 10:59:46 +02:00
121 lines
2.8 KiB
HTML
121 lines
2.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<title>LuaSocket: Network support for the Lua language</title>
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<link rel="stylesheet" href="reference.css" type="text/css">
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</head>
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<body>
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<!-- header +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
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<div class=header>
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<hr>
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<center>
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<table summary="LuaSocket logo">
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<tr><td align=center><a href="http://www.lua.org">
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<img border=0 alt="LuaSocket" src="luasocket.png">
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</a></td></tr>
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<tr><td align=center valign=top>Network support for the Lua language
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</td></tr>
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</table>
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<p class=bar>
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<a href="home.html">home</a> ·
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<a href="home.html#download">download</a> ·
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<a href="introduction.html">introduction</a> ·
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<a href="reference.html">reference</a>
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</p>
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</center>
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<hr>
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</div>
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<!-- dns ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
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<h2 id=dns>DNS</h2>
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<p>
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The following functions can be used to convert between host names and IP
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addresses. Both functions return <em>all</em> information returned by the
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resolver in a table of the form:
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</p>
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<blockquote><tt>
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resolved = {<br>
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name = <i>canonic-name</i>,<br>
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alias = <i>alias-list</i>,<br>
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ip = <i>ip-address-list</i><br>
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}
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</tt> </blockquote>
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<p>
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Note that the <tt>alias</tt> list can be empty.
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</p>
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<!-- tohostname +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
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<p class=name id=tohostname>
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socket.dns.<b>tohostname()</b>
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</p>
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<p class=description>
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Converts from IP address to host name.
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</p>
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<p class=parameters>
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<tt>Address</tt> can be an IP address or host name.
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</p>
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<p class=return>
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The function a string with the canonic host name of the given
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<tt>address</tt>, followed by a table with all information returned by
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the resolver. In case of error, the function returns <tt>nil</tt>
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followed by an error message.
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</p>
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<!-- toip +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
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<p class=name id=toip>
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socket.dns.<b>toip()</b>
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</p>
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<p class=description>
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Converts from host name to IP address.
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</p>
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<p class=parameters>
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<tt>Address</tt> can be an IP address or host name.
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</p>
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<p class=return>
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Returns a string with the first IP address found for <tt>address</tt>,
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followed by a table with all information returned by the resolver.
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In case of error, the function returns <tt>nil</tt> followed by an error
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message.
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</p>
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<!-- footer +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
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<div class=footer>
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<hr>
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<center>
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<p class=bar>
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<a href="home.html">home</a> ·
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<a href="home.html#down">download</a> ·
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<a href="introduction.html">introduction</a> ·
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<a href="reference.html">reference</a>
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</p>
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<p>
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<small>
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Last modified by Diego Nehab on <br>
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Sat Aug 9 01:00:41 PDT 2003
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</small>
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</p>
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</center>
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</div>
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</body>
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</html>
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