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<title>Class: TelnetFilter</title>
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<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="107,113,187,161" href="TelnetFilter.html" alt="TelnetFilter
">
<area shape="RECT" coords="7,17,84,65" href="ASCIICodes.html" alt="ASCIICodes
">
<area shape="RECT" coords="108,17,185,65" href="TelnetCodes.html" alt="TelnetCodes
">
<area shape="RECT" coords="209,17,281,65" href="Filter.html" alt="Filter
">
</map>
<img src="../dot/f_39.png" usemap="#map" border=0 alt="TopLevel">
</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="#M000128">desired?</a>
<a href="#M000129">echo</a>
<a href="#M000127">enabled?</a>
<a href="#M000125">filter_in</a>
<a href="#M000126">filter_out</a>
<a href="#M000124">init</a>
<a href="#M000130">init_subneg</a>
<a href="#M000123">new</a>
<a href="#M000131">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-M000123" class="method-detail">
<a name="M000123"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000123.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000123.html');return false;">
<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>
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000128" class="method-detail">
<a name="M000128"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000128.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000128.html');return false;">
<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>
</div>
</div>
<div id="method-M000129" class="method-detail">
<a name="M000129"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000129.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000129.html');return false;">
<span class="method-name">echo</span><span class="method-args">(ch)</span>
</a>
</div>
<div class="method-description">
<p>
Handle server-side echo
</p>
<dl>
<dt><tt>ch</tt></dt><dd>character string to echo
</dd>
</dl>
</div>
</div>
<div id="method-M000127" class="method-detail">
<a name="M000127"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000127.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000127.html');return false;">
<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>
</div>
</div>
<div id="method-M000125" class="method-detail">
<a name="M000125"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000125.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000125.html');return false;">
<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#M000125">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>
</div>
</div>
<div id="method-M000126" class="method-detail">
<a name="M000126"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000126.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000126.html');return false;">
<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#M000126">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>
</div>
</div>
<div id="method-M000124" class="method-detail">
<a name="M000124"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000124.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000124.html');return false;">
<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>
</div>
</div>
<div id="method-M000130" class="method-detail">
<a name="M000130"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000130.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000130.html');return false;">
<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>
</div>
</div>
<div id="method-M000131" class="method-detail">
<a name="M000131"></a>
<div class="method-heading">
<a href="TelnetFilter.src/M000131.html" target="Code" class="method-signature"
onclick="popupCode('TelnetFilter.src/M000131.html');return false;">
<span class="method-name">send_naws</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
</div>
</div>
</div>
</div>
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