<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Class: TelnetFilter</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<link rel="stylesheet" href=".././rdoc-style.css" type="text/css" media="screen" />
<script type="text/javascript">
// <![CDATA[
function popupCode( url ) {
window.open(url, "Code", "resizable=yes,scrollbars=yes,toolbar=no,status=no,height=150,width=400")
}
function toggleCode( id ) {
if ( document.getElementById )
elem = document.getElementById( id );
else if ( document.all )
elem = eval( "document.all." + id );
else
return false;
elemStyle = elem.style;
if ( elemStyle.display != "block" ) {
elemStyle.display = "block"
} else {
elemStyle.display = "none"
}
return true;
}
// Make codeblocks hidden by default
document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }</style>" )
// ]]>
</script>
</head>
<body>
<div id="classHeader">
<table class="header-table">
<tr class="top-aligned-row">
<td><strong>Class</strong></td>
<td class="class-name-in-header">TelnetFilter</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td>
<a href="../files/lib/network/protocol/telnetfilter_rb.html">
lib/network/protocol/telnetfilter.rb
</a>
<br />
</td>
</tr>
<tr class="top-aligned-row">
<td><strong>Parent:</strong></td>
<td>
<a href="Filter.html">
Filter
</a>
</td>
</tr>
</table>
</div>
<!-- banner header -->
<div id="bodyContent">
<div id="contextContent">
<div id="diagram">
<map id="map" name="map">
<area shape="rect" coords="104,101,192,149" href="TelnetFilter.html" alt="TelnetFilter
" />
<area shape="rect" coords="5,5,83,53" href="ASCIICodes.html" alt="ASCIICodes
" />
<area shape="rect" coords="107,5,189,53" href="TelnetCodes.html" alt="TelnetCodes
" />
<area shape="rect" coords="213,5,285,53" href="Filter.html" alt="Filter
" />
</map>
<img src="../dot/f_36.png" usemap="#map" border="0" alt="dot/f_36.png">
</div>
<div id="description">
<p>
The <a href="TelnetFilter.html">TelnetFilter</a> class implements the
Telnet protocol.
</p>
<p>
This implements most of basic Telnet as per RFCs 854/855/1129/1143 and
options in RFCs 857/858/1073/1091
</p>
</div>
</div>
<div id="method-list">
<h3 class="section-bar">Methods</h3>
<div class="name-list">
<a href="#M000189">desired?</a>
<a href="#M000190">echo</a>
<a href="#M000188">enabled?</a>
<a href="#M000186">filter_in</a>
<a href="#M000187">filter_out</a>
<a href="#M000185">init</a>
<a href="#M000191">init_subneg</a>
<a href="#M000184">new</a>
<a href="#M000192">send_naws</a>
</div>
</div>
</div>
<!-- if includes -->
<div id="includes">
<h3 class="section-bar">Included Modules</h3>
<div id="includes-list">
<span class="include-name"><a href="ASCIICodes.html">ASCIICodes</a></span>
<span class="include-name"><a href="TelnetCodes.html">TelnetCodes</a></span>
</div>
</div>
<div id="section">
<!-- if method_list -->
<div id="methods">
<h3 class="section-bar">Public Class methods</h3>
<div id="method-M000184" class="method-detail">
<a name="M000184"></a>
<div class="method-heading">
<a href="#M000184" class="method-signature">
<span class="method-name">new</span><span class="method-args">(pstack, server)</span>
</a>
</div>
<div class="method-description">
<p>
Initialize state of filter
</p>
<dl>
<dt><tt>pstack</tt></dt><dd>The <a href="ProtocolStack.html">ProtocolStack</a> associated with this
filter
</dd>
<dt><tt>server</tt></dt><dd>An optional hash of desired initial options
</dd>
</dl>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000184-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000184-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 37</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">pstack</span>, <span class="ruby-identifier">server</span>)
<span class="ruby-keyword kw">super</span>(<span class="ruby-identifier">pstack</span>)
<span class="ruby-ivar">@server</span> = <span class="ruby-identifier">server</span>
<span class="ruby-ivar">@wopts</span> = {}
<span class="ruby-identifier">getopts</span>(<span class="ruby-ivar">@server</span>.<span class="ruby-identifier">service_negotiation</span>)
<span class="ruby-ivar">@mode</span> = <span class="ruby-identifier">:normal</span> <span class="ruby-comment cmt"># Parse mode :normal, :cmd, :cr</span>
<span class="ruby-ivar">@state</span> = {}
<span class="ruby-ivar">@sc</span> = <span class="ruby-keyword kw">nil</span>
<span class="ruby-ivar">@sneg_opts</span> = [ <span class="ruby-constant">TTYPE</span>, <span class="ruby-constant">ZMP</span> ] <span class="ruby-comment cmt"># supported options which imply an initial</span>
<span class="ruby-comment cmt"># sub negotiation of options</span>
<span class="ruby-ivar">@ttype</span> = []
<span class="ruby-ivar">@init_tries</span> = <span class="ruby-value">0</span> <span class="ruby-comment cmt"># Number of tries at negotitating sub options</span>
<span class="ruby-ivar">@synch</span> = <span class="ruby-keyword kw">false</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span> <span class="ruby-node">"telnet filter initialized - #{@init_tries}"</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000189" class="method-detail">
<a name="M000189"></a>
<div class="method-heading">
<a href="#M000189" class="method-signature">
<span class="method-name">desired?</span><span class="method-args">(opt)</span>
</a>
</div>
<div class="method-description">
<p>
Test to see which state we prefer this option to be in
</p>
<dl>
<dt><tt>opt</tt></dt><dd>The Telnet option code
</dd>
</dl>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000189-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000189-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 286</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">desired?</span>(<span class="ruby-identifier">opt</span>)
<span class="ruby-identifier">st</span> = <span class="ruby-ivar">@wopts</span>[<span class="ruby-identifier">opt</span>]
<span class="ruby-identifier">st</span> = <span class="ruby-keyword kw">false</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">st</span>.<span class="ruby-identifier">nil?</span>
<span class="ruby-identifier">st</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000190" class="method-detail">
<a name="M000190"></a>
<div class="method-heading">
<a href="#M000190" class="method-signature">
<span class="method-name">echo</span><span class="method-args">(ch)</span>
</a>
</div>
<div class="method-description">
<p>
Handle server-side <a href="TelnetFilter.html#M000190">echo</a>
</p>
<dl>
<dt><tt>ch</tt></dt><dd>character string to <a href="TelnetFilter.html#M000190">echo</a>
</dd>
</dl>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000190-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000190-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 294</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">echo</span>(<span class="ruby-identifier">ch</span>)
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@server</span>.<span class="ruby-identifier">service_type</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">:client</span> <span class="ruby-comment cmt"># Never echo for server when client</span>
<span class="ruby-comment cmt"># Remove this if it makes sense for peer to peer</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">echo_on</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">hide_on</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">ch</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">!=</span> <span class="ruby-constant">CR</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sock</span>.<span class="ruby-identifier">send</span>(<span class="ruby-value str">'*'</span>,<span class="ruby-value">0</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sock</span>.<span class="ruby-identifier">send</span>(<span class="ruby-identifier">ch</span>,<span class="ruby-value">0</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000188" class="method-detail">
<a name="M000188"></a>
<div class="method-heading">
<a href="#M000188" class="method-signature">
<span class="method-name">enabled?</span><span class="method-args">(opt, who)</span>
</a>
</div>
<div class="method-description">
<p>
Test to see if option is enabled
</p>
<dl>
<dt><tt>opt</tt></dt><dd>The Telnet option code
</dd>
<dt><tt>who</tt></dt><dd>The side to check :us or :him
</dd>
</dl>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000188-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000188-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 278</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">enabled?</span>(<span class="ruby-identifier">opt</span>, <span class="ruby-identifier">who</span>)
<span class="ruby-identifier">option</span>(<span class="ruby-identifier">opt</span>)
<span class="ruby-identifier">e</span> = <span class="ruby-ivar">@state</span>[<span class="ruby-identifier">opt</span>].<span class="ruby-identifier">send</span>(<span class="ruby-identifier">who</span>)
<span class="ruby-identifier">e</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">:yes</span> <span class="ruby-operator">?</span> <span class="ruby-keyword kw">true</span> <span class="ruby-operator">:</span> <span class="ruby-keyword kw">false</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000186" class="method-detail">
<a name="M000186"></a>
<div class="method-heading">
<a href="#M000186" class="method-signature">
<span class="method-name">filter_in</span><span class="method-args">(str)</span>
</a>
</div>
<div class="method-description">
<p>
The <a href="TelnetFilter.html#M000186">filter_in</a> method filters input
data
</p>
<dl>
<dt><tt>str</tt></dt><dd>The string to be processed
</dd>
<dt><tt>return</tt></dt><dd>The filtered data
</dd>
</dl>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000186-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000186-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 84</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">filter_in</span>(<span class="ruby-identifier">str</span>)
<span class="ruby-comment cmt"># init_subneg</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-value str">""</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">str</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">str</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-identifier">buf</span> = <span class="ruby-value str">""</span>
<span class="ruby-ivar">@sc</span> <span class="ruby-operator">?</span> <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">concat</span>(<span class="ruby-identifier">str</span>) <span class="ruby-operator">:</span> <span class="ruby-ivar">@sc</span> = <span class="ruby-constant">StringScanner</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">str</span>)
<span class="ruby-keyword kw">while</span> <span class="ruby-identifier">b</span> = <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">get_byte</span>
<span class="ruby-comment cmt"># OOB sync data</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">urgent_on</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">b</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">==</span> <span class="ruby-constant">DM</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) Sync mode on"</span>)
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">urgent_on</span> = <span class="ruby-keyword kw">false</span>
<span class="ruby-ivar">@synch</span> = <span class="ruby-keyword kw">true</span>
<span class="ruby-keyword kw">break</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">mode?</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-identifier">:normal</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">b</span>[<span class="ruby-value">0</span>]
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">CR</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@synch</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:cr</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">binary_on</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">LF</span> <span class="ruby-comment cmt"># LF or LF/CR may be issued by broken mud servers and clients</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@synch</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:lf</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">binary_on</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-constant">LF</span>.<span class="ruby-identifier">chr</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-constant">CR</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">LF</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">IAC</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:cmd</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">NUL</span> <span class="ruby-comment cmt"># ignore NULs in stream when in normal mode</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@synch</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">binary_on</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">b</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-identifier">b</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) unexpected NUL found in stream"</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">BS</span>, <span class="ruby-constant">DEL</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@synch</span>
<span class="ruby-comment cmt"># Leaves BS, DEL in input stream for higher filter to deal with.</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">b</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-constant">BS</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@synch</span>
<span class="ruby-comment cmt">### NOTE - we will allow 8-bit NVT against RFC 1123 recommendation "should not"</span>
<span class="ruby-comment cmt">###</span>
<span class="ruby-comment cmt"># Only let 7-bit values through in normal mode</span>
<span class="ruby-comment cmt">#if (b[0] & 0x80 == 0) && !@pstack.binary_on</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">b</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-identifier">b</span>)
<span class="ruby-comment cmt">#else</span>
<span class="ruby-comment cmt"># log.debug("(#{@pstack.conn.object_id}) unexpected 8-bit byte found in stream '#{b[0]}'")</span>
<span class="ruby-comment cmt">#end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-identifier">:cr</span>
<span class="ruby-comment cmt"># handle CRLF and CRNUL by insertion of LF into buffer</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">b</span>[<span class="ruby-value">0</span>]
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">LF</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-constant">LF</span>.<span class="ruby-identifier">chr</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-constant">CR</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">LF</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">NUL</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@server</span>.<span class="ruby-identifier">service_type</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">:client</span> <span class="ruby-comment cmt"># Don't xlate CRNUL when client</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-constant">CR</span>.<span class="ruby-identifier">chr</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-constant">CR</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-constant">LF</span>.<span class="ruby-identifier">chr</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-constant">CR</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">LF</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">else</span> <span class="ruby-comment cmt"># eat lone CR</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">b</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-identifier">b</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-identifier">:lf</span>
<span class="ruby-comment cmt"># liberally handle LF, LFCR for clients that aren't telnet correct</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">b</span>[<span class="ruby-value">0</span>]
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">CR</span> <span class="ruby-comment cmt"># Handle LFCR by swallowing CR</span>
<span class="ruby-keyword kw">else</span> <span class="ruby-comment cmt"># Handle other stuff that follows - single LF</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">b</span>
<span class="ruby-identifier">echo</span>(<span class="ruby-identifier">b</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-identifier">:cmd</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">b</span>[<span class="ruby-value">0</span>]
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">IAC</span>
<span class="ruby-comment cmt"># IAC escapes IAC</span>
<span class="ruby-identifier">buf</span> <span class="ruby-operator"><<</span> <span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">AYT</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) AYT sent - Msg returned"</span>)
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sock</span>.<span class="ruby-identifier">send</span>(<span class="ruby-value str">"TeensyMUD is here.\n"</span>,<span class="ruby-value">0</span>)
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">AO</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) AO sent - Synch returned"</span>)
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sockio</span>.<span class="ruby-identifier">write_flush</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sock</span>.<span class="ruby-identifier">send</span>(<span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">DM</span>.<span class="ruby-identifier">chr</span>, <span class="ruby-value">0</span>)
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sockio</span>.<span class="ruby-identifier">write_urgent</span>(<span class="ruby-constant">DM</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">IP</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sockio</span>.<span class="ruby-identifier">read_flush</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sockio</span>.<span class="ruby-identifier">write_flush</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) IP sent"</span>)
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">GA</span>, <span class="ruby-constant">NOP</span>, <span class="ruby-constant">BRK</span> <span class="ruby-comment cmt"># not implemented or ignored</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) GA, NOP or BRK sent"</span>)
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">DM</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) Synch mode off"</span>)
<span class="ruby-ivar">@synch</span> = <span class="ruby-keyword kw">false</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">EC</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@synch</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) EC sent"</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">buf</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">></span> <span class="ruby-value">1</span>
<span class="ruby-identifier">buf</span>.<span class="ruby-identifier">slice!</span>(<span class="ruby-value">-1</span>)
<span class="ruby-keyword kw">elsif</span> <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">inbuffer</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">></span> <span class="ruby-value">0</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">inbuffer</span>.<span class="ruby-identifier">slice</span>(<span class="ruby-value">-1</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">EL</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@synch</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) EL sent"</span>)
<span class="ruby-identifier">p</span> = <span class="ruby-identifier">buf</span>.<span class="ruby-identifier">rindex</span>(<span class="ruby-value str">"\n"</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">p</span>
<span class="ruby-identifier">buf</span>.<span class="ruby-identifier">slice!</span>(<span class="ruby-identifier">p</span><span class="ruby-operator">+</span><span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-value">-1</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">buf</span> = <span class="ruby-value str">""</span>
<span class="ruby-identifier">p</span> = <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">inbuffer</span>.<span class="ruby-identifier">rindex</span>(<span class="ruby-value str">"\n"</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">p</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">inbuffer</span>.<span class="ruby-identifier">slice!</span>(<span class="ruby-identifier">p</span><span class="ruby-operator">+</span><span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-value">-1</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">DO</span>, <span class="ruby-constant">DONT</span>, <span class="ruby-constant">WILL</span>, <span class="ruby-constant">WONT</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">eos?</span>
<span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">unscan</span>
<span class="ruby-keyword kw">break</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">opt</span> = <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">get_byte</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">b</span>[<span class="ruby-value">0</span>]
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">WILL</span>
<span class="ruby-identifier">replies_him</span>(<span class="ruby-identifier">opt</span>[<span class="ruby-value">0</span>],<span class="ruby-keyword kw">true</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">WONT</span>
<span class="ruby-identifier">replies_him</span>(<span class="ruby-identifier">opt</span>[<span class="ruby-value">0</span>],<span class="ruby-keyword kw">false</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">DO</span>
<span class="ruby-identifier">requests_us</span>(<span class="ruby-identifier">opt</span>[<span class="ruby-value">0</span>],<span class="ruby-keyword kw">true</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">DONT</span>
<span class="ruby-identifier">requests_us</span>(<span class="ruby-identifier">opt</span>[<span class="ruby-value">0</span>],<span class="ruby-keyword kw">false</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-comment cmt"># Update interesting things in ProtocolStack after negotiation</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">opt</span>[<span class="ruby-value">0</span>]
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">ECHO</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">echo_on</span> = <span class="ruby-identifier">enabled?</span>(<span class="ruby-constant">ECHO</span>, <span class="ruby-identifier">:us</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">BINARY</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">binary_on</span> = <span class="ruby-identifier">enabled?</span>(<span class="ruby-constant">BINARY</span>, <span class="ruby-identifier">:us</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">ZMP</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">zmp_on</span> = <span class="ruby-identifier">enabled?</span>(<span class="ruby-constant">ZMP</span>, <span class="ruby-identifier">:us</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">SB</span>
<span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">unscan</span>
<span class="ruby-keyword kw">break</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">check_until</span>(<span class="ruby-node">/#{IAC.chr}#{SE.chr}/</span>).<span class="ruby-identifier">nil?</span>
<span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">get_byte</span>
<span class="ruby-identifier">opt</span> = <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">get_byte</span>
<span class="ruby-identifier">data</span> = <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">scan_until</span>(<span class="ruby-node">/#{IAC.chr}#{SE.chr}/</span>).<span class="ruby-identifier">chop</span>.<span class="ruby-identifier">chop</span>
<span class="ruby-identifier">parse_subneg</span>(<span class="ruby-identifier">opt</span>[<span class="ruby-value">0</span>],<span class="ruby-identifier">data</span>)
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) Unknown Telnet command - #{b[0]}"</span>)
<span class="ruby-identifier">set_mode</span>(<span class="ruby-identifier">:normal</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span> <span class="ruby-comment cmt"># while b</span>
<span class="ruby-ivar">@sc</span> = <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">eos?</span>
<span class="ruby-identifier">buf</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000187" class="method-detail">
<a name="M000187"></a>
<div class="method-heading">
<a href="#M000187" class="method-signature">
<span class="method-name">filter_out</span><span class="method-args">(str)</span>
</a>
</div>
<div class="method-description">
<p>
The <a href="TelnetFilter.html#M000187">filter_out</a> method filters
output data
</p>
<dl>
<dt><tt>str</tt></dt><dd>The string to be processed
</dd>
<dt><tt>return</tt></dt><dd>The filtered data
</dd>
</dl>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000187-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000187-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 265</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">filter_out</span>(<span class="ruby-identifier">str</span>)
<span class="ruby-keyword kw">return</span> <span class="ruby-value str">''</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">str</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">str</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">binary_on</span>
<span class="ruby-identifier">str</span>.<span class="ruby-identifier">gsub!</span>(<span class="ruby-regexp re">/\n/</span>, <span class="ruby-value str">"\r\n"</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">str</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000185" class="method-detail">
<a name="M000185"></a>
<div class="method-heading">
<a href="#M000185" class="method-signature">
<span class="method-name">init</span><span class="method-args">(args)</span>
</a>
</div>
<div class="method-description">
<p>
Negotiate starting wanted options
</p>
<dl>
<dt><tt>args</tt></dt><dd>Optional initial options
</dd>
</dl>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000185-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000185-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 56</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">init</span>(<span class="ruby-identifier">args</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@server</span>.<span class="ruby-identifier">service_type</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">:client</span> <span class="ruby-comment cmt"># let server offer and ask for client</span>
<span class="ruby-comment cmt"># several sorts of options here - server offer, ask client or both</span>
<span class="ruby-ivar">@wopts</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">key</span>,<span class="ruby-identifier">val</span><span class="ruby-operator">|</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">key</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">ECHO</span>, <span class="ruby-constant">SGA</span>, <span class="ruby-constant">BINARY</span>, <span class="ruby-constant">ZMP</span>, <span class="ruby-constant">EOREC</span>
<span class="ruby-identifier">ask_him</span>(<span class="ruby-identifier">key</span>,<span class="ruby-identifier">val</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">offer_us</span>(<span class="ruby-identifier">key</span>,<span class="ruby-identifier">val</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-comment cmt"># several sorts of options here - server offer, ask client or both</span>
<span class="ruby-ivar">@wopts</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">key</span>,<span class="ruby-identifier">val</span><span class="ruby-operator">|</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">key</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">ECHO</span>, <span class="ruby-constant">SGA</span>, <span class="ruby-constant">BINARY</span>, <span class="ruby-constant">ZMP</span>, <span class="ruby-constant">EOREC</span>
<span class="ruby-identifier">offer_us</span>(<span class="ruby-identifier">key</span>,<span class="ruby-identifier">val</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">ask_him</span>(<span class="ruby-identifier">key</span>,<span class="ruby-identifier">val</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">true</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000191" class="method-detail">
<a name="M000191"></a>
<div class="method-heading">
<a href="#M000191" class="method-signature">
<span class="method-name">init_subneg</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
Negotiate starting wanted options that imply subnegotation So far only
terminal type
</p>
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000191-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000191-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 308</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">init_subneg</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@init_tries</span> <span class="ruby-operator">></span> <span class="ruby-value">20</span>
<span class="ruby-ivar">@init_tries</span> <span class="ruby-operator">+=</span> <span class="ruby-value">1</span>
<span class="ruby-ivar">@wopts</span>.<span class="ruby-identifier">each_key</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">opt</span><span class="ruby-operator">|</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@sneg_opts</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">opt</span>)
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) Subnegotiation attempt for option #{opt}."</span>)
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">opt</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">TTYPE</span>
<span class="ruby-identifier">who</span> = <span class="ruby-identifier">:him</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">who</span> = <span class="ruby-identifier">:us</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">desired?</span>(<span class="ruby-identifier">opt</span>) <span class="ruby-operator">==</span> <span class="ruby-identifier">enabled?</span>(<span class="ruby-identifier">opt</span>, <span class="ruby-identifier">who</span>)
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">opt</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">TTYPE</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sendmsg</span>(<span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">SB</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">TTYPE</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-value">1</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">SE</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-constant">ZMP</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">info</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) ZMP successfully negotiated."</span> )
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sendmsg</span>(<span class="ruby-node">"#{IAC.chr}#{SB.chr}#{ZMP.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"zmp.check#{NUL.chr}color.#{NUL.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"#{IAC.chr}#{SE.chr}"</span>)
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sendmsg</span>(<span class="ruby-node">"#{IAC.chr}#{SB.chr}#{ZMP.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"zmp.ident#{NUL.chr}TeensyMUD#{NUL.chr}#{Version}#{NUL.chr}A sexy mud server#{NUL.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"#{IAC.chr}#{SE.chr}"</span>)
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sendmsg</span>(<span class="ruby-node">"#{IAC.chr}#{SB.chr}#{ZMP.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"zmp.ping#{NUL.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"#{IAC.chr}#{SE.chr}"</span>)
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sendmsg</span>(<span class="ruby-node">"#{IAC.chr}#{SB.chr}#{ZMP.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"zmp.input#{NUL.chr}\n I see you support...\n ZMP protocol\n#{NUL.chr}"</span> <span class="ruby-operator">+</span>
<span class="ruby-node">"#{IAC.chr}#{SE.chr}"</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-ivar">@sneg_opts</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-identifier">opt</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@init_tries</span> <span class="ruby-operator">></span> <span class="ruby-value">20</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"(#{@pstack.conn.object_id}) Telnet init_subneg option - Timed out after #{@init_tries} tries."</span>)
<span class="ruby-ivar">@sneg_opts</span> = []
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">set_initdone</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">terminal</span> <span class="ruby-keyword kw">or</span> <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">terminal</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">terminal</span> = <span class="ruby-value str">"dumb"</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000192" class="method-detail">
<a name="M000192"></a>
<div class="method-heading">
<a href="#M000192" class="method-signature">
<span class="method-name">send_naws</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000192-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000192-source">
<pre>
<span class="ruby-comment cmt"># File lib/network/protocol/telnetfilter.rb, line 353</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">send_naws</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-identifier">enabled?</span>(<span class="ruby-constant">NAWS</span>, <span class="ruby-identifier">:us</span>)
<span class="ruby-identifier">ts</span> = <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">query</span>(<span class="ruby-identifier">:termsize</span>)
<span class="ruby-identifier">data</span> = [<span class="ruby-identifier">ts</span>[<span class="ruby-value">0</span>]].<span class="ruby-identifier">pack</span>(<span class="ruby-value str">'n'</span>) <span class="ruby-operator">+</span> [<span class="ruby-identifier">ts</span>[<span class="ruby-value">1</span>]].<span class="ruby-identifier">pack</span>(<span class="ruby-value str">'n'</span>)
<span class="ruby-identifier">data</span>.<span class="ruby-identifier">gsub!</span>(<span class="ruby-node">/#{IAC}/</span>, <span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span>) <span class="ruby-comment cmt"># 255 needs to be doubled</span>
<span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">conn</span>.<span class="ruby-identifier">sendmsg</span>(<span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">SB</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">NAWS</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">data</span> <span class="ruby-operator">+</span> <span class="ruby-constant">IAC</span>.<span class="ruby-identifier">chr</span> <span class="ruby-operator">+</span> <span class="ruby-constant">SE</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
</div>
</div>
<div id="validator-badges">
<p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p>
</div>
</body>
</html>
