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<head>
<title>Class: Net::SSH::Proxy::SOCKS4</title>
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<table width="100%" border='0' cellpadding='0' cellspacing='0' class='banner'><tr>
<td class="file-title"><span class="file-title-prefix">Class</span><br />Net::SSH::Proxy::SOCKS4</td>
<td align="right">
<table cellspacing=0 cellpadding=2>
<tr valign="top">
<td>In:</td>
<td>
<a href="../../../../files/lib/net/ssh/proxy/socks4_rb.html">lib/net/ssh/proxy/socks4.rb</a>
</td>
</tr>
<tr>
<td>Parent:</td>
<td>
Object
</td>
</tr>
</table>
</td>
</tr>
</table>
<!-- banner header -->
<div id="bodyContent">
<div id="content">
<div class="description"><p>
An implementation of a socket factory that returns a socket which will
tunnel the connection through a <a href="SOCKS4.html">SOCKS4</a> proxy. It
allows explicit specification of the user, but if it is not given it will
look in the SOCKS_USER and CONNECT_USER environment variables as well.
</p>
</div>
<div class="sectiontitle">Methods</div>
<ul>
<li><a href="#M000090">new</a></li>
<li><a href="#M000091">open</a></li>
</ul>
<div class="sectiontitle">Constants</div>
<table border='0' cellpadding='5'>
<tr valign='top'>
<td class="attr-name">SOCKS_VERSION</td>
<td>=</td>
<td class="attr-value">4</td>
</tr>
<tr valign='top'>
<td class="attr-name">SOCKS_CMD_CONNECT</td>
<td>=</td>
<td class="attr-value">1</td>
</tr>
<tr valign='top'>
<td class="attr-name">SOCKS_GRANTED</td>
<td>=</td>
<td class="attr-value">90</td>
</tr>
<tr valign='top'>
<td class="attr-name">SOCKS_REJECTED</td>
<td>=</td>
<td class="attr-value">91</td>
</tr>
<tr valign='top'>
<td class="attr-name">SOCKS_IDENTD_REJECT</td>
<td>=</td>
<td class="attr-value">92</td>
</tr>
<tr valign='top'>
<td class="attr-name">SOCKS_IDENTD_BAD</td>
<td>=</td>
<td class="attr-value">93</td>
</tr>
</table>
<div class="sectiontitle">Public Class methods</div>
<div class="method">
<div class="title">
<a name="M000090"></a><b>new</b>( proxy_host, proxy_port=1080, options={} )
</div>
<div class="description">
<p>
Create a <a href="SOCKS4.html#M000090">new</a> proxy connection to the
given proxy host and port. Optionally, a @:user@ option may be given to
identify the username with which to authenticate.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000090_source')" id="l_M000090_source">show source</a> ]</p>
<div id="M000090_source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/proxy/socks4.rb, line 44</span>
44: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>( <span class="ruby-identifier">proxy_host</span>, <span class="ruby-identifier">proxy_port</span>=<span class="ruby-value">1080</span>, <span class="ruby-identifier">options</span>={} )
45: <span class="ruby-ivar">@proxy_host</span> = <span class="ruby-identifier">proxy_host</span>
46: <span class="ruby-ivar">@proxy_port</span> = <span class="ruby-identifier">proxy_port</span>
47: <span class="ruby-ivar">@options</span> = <span class="ruby-identifier">options</span>
48: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="sectiontitle">Public Instance methods</div>
<div class="method">
<div class="title">
<a name="M000091"></a><b>open</b>( host, port )
</div>
<div class="description">
<p>
Return a <a href="SOCKS4.html#M000090">new</a> socket connected to the
given host and port via the proxy that was requested when the socket
factory was instantiated.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000091_source')" id="l_M000091_source">show source</a> ]</p>
<div id="M000091_source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/net/ssh/proxy/socks4.rb, line 52</span>
52: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">open</span>( <span class="ruby-identifier">host</span>, <span class="ruby-identifier">port</span> )
53: <span class="ruby-identifier">sock</span> = <span class="ruby-constant">TCPSocket</span>.<span class="ruby-identifier">new</span>( <span class="ruby-ivar">@proxy_host</span>, <span class="ruby-ivar">@proxy_port</span> )
54:
55: <span class="ruby-identifier">ip_addr</span> = <span class="ruby-constant">IPAddr</span>.<span class="ruby-identifier">new</span>( <span class="ruby-constant">Resolv</span>.<span class="ruby-identifier">getaddress</span>( <span class="ruby-identifier">host</span> ) )
56:
57: <span class="ruby-identifier">packet</span> = [ <span class="ruby-constant">SOCKS_VERSION</span>, <span class="ruby-constant">SOCKS_CMD_CONNECT</span>,
58: <span class="ruby-identifier">port</span>.<span class="ruby-identifier">to_i</span>, <span class="ruby-identifier">ip_addr</span>.<span class="ruby-identifier">to_i</span>,
59: <span class="ruby-identifier">proxy_user</span>, <span class="ruby-value">0</span> ].<span class="ruby-identifier">pack</span>( <span class="ruby-value str">"CCnNA*C"</span> )
60: <span class="ruby-identifier">sock</span>.<span class="ruby-identifier">send</span> <span class="ruby-identifier">packet</span>, <span class="ruby-value">0</span>
61:
62: <span class="ruby-identifier">version</span>, <span class="ruby-identifier">status</span>, <span class="ruby-identifier">port</span>, <span class="ruby-identifier">ip</span> = <span class="ruby-identifier">sock</span>.<span class="ruby-identifier">recv</span>( <span class="ruby-value">8</span> ).<span class="ruby-identifier">unpack</span>( <span class="ruby-value str">"CCnN"</span> )
63: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">status</span> <span class="ruby-operator">!=</span> <span class="ruby-constant">SOCKS_GRANTED</span>
64: <span class="ruby-identifier">sock</span>.<span class="ruby-identifier">close</span>
65: <span class="ruby-identifier">raise</span> <span class="ruby-constant">ConnectError</span>, <span class="ruby-node">"error connecting to proxy (#{status})"</span>
66: <span class="ruby-keyword kw">end</span>
67:
68: <span class="ruby-keyword kw">return</span> <span class="ruby-identifier">sock</span>
69: <span class="ruby-keyword kw">end</span>
</pre>
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