<!DOCTYPE html> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> <title>class TelnetFilter - TeensyMUD 3.0.0 Mud Server</title> <link type="text/css" media="screen" href="./rdoc.css" rel="stylesheet"> <script type="text/javascript"> var rdoc_rel_prefix = "./"; </script> <script type="text/javascript" charset="utf-8" src="./js/jquery.js"></script> <script type="text/javascript" charset="utf-8" src="./js/navigation.js"></script> <script type="text/javascript" charset="utf-8" src="./js/search_index.js"></script> <script type="text/javascript" charset="utf-8" src="./js/search.js"></script> <script type="text/javascript" charset="utf-8" src="./js/searcher.js"></script> <script type="text/javascript" charset="utf-8" src="./js/darkfish.js"></script> <body id="top" class="class"> <nav id="metadata"> <nav id="home-section" class="section"> <h3 class="section-header"> <a href="./index.html">Home</a> <a href="./table_of_contents.html#classes">Classes</a> <a 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href="./ConsoleClient.html">ConsoleClient</a> <li><a href="./CursesClient.html">CursesClient</a> <li><a href="./DbmStore.html">DbmStore</a> <li><a href="./DebugFilter.html">DebugFilter</a> <li><a href="./Dumper.html">Dumper</a> <li><a href="./Engine.html">Engine</a> <li><a href="./Event.html">Event</a> <li><a href="./EventManager.html">EventManager</a> <li><a href="./Exit.html">Exit</a> <li><a href="./Filter.html">Filter</a> <li><a href="./GameObject.html">GameObject</a> <li><a href="./GdbmStore.html">GdbmStore</a> <li><a href="./LineIO.html">LineIO</a> <li><a href="./Loader.html">Loader</a> <li><a href="./Log.html">Log</a> <li><a href="./Module.html">Module</a> <li><a href="./Obj.html">Obj</a> <li><a href="./ObjCmd.html">ObjCmd</a> <li><a href="./Object.html">Object</a> <li><a href="./PacketIO.html">PacketIO</a> <li><a href="./ProtocolStack.html">ProtocolStack</a> <li><a href="./Publisher.html">Publisher</a> <li><a href="./Reactor.html">Reactor</a> <li><a href="./Room.html">Room</a> <li><a href="./Root.html">Root</a> <li><a href="./Script.html">Script</a> <li><a href="./SdbmStore.html">SdbmStore</a> <li><a href="./Session.html">Session</a> <li><a href="./SockIO.html">SockIO</a> <li><a href="./Sqlite3Store.html">Sqlite3Store</a> <li><a href="./SqliteStore.html">SqliteStore</a> <li><a href="./Store.html">Store</a> <li><a href="./String.html">String</a> <li><a href="./TelnetCodes.html">TelnetCodes</a> <li><a href="./TelnetFilter.html">TelnetFilter</a> <li><a href="./TerminalFilter.html">TerminalFilter</a> <li><a href="./Timer.html">Timer</a> <li><a href="./Utility.html">Utility</a> <li><a href="./VT100Codes.html">VT100Codes</a> <li><a href="./World.html">World</a> <li><a href="./XmlStore.html">XmlStore</a> <li><a href="./YamlStore.html">YamlStore</a> </ul> </nav> </div> </nav> <div id="documentation"> <h1 class="class">class TelnetFilter</h1> <div id="description" class="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><!-- description --> <section id="5Buntitled-5D" class="documentation-section"> <!-- Methods --> <section id="public-class-5Buntitled-5D-method-details" class="method-section section"> <h3 class="section-header">Public Class Methods</h3> <div id="method-c-new" class="method-detail "> <div class="method-heading"> <span class="method-name">new</span><span class="method-args">(pstack, server)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>Initialize state of filter</p> <dl class="rdoc-list label-list"><dt><code>pstack</code> <dd> <p>The <a href="ProtocolStack.html">ProtocolStack</a> associated with this filter</p> </dd><dt><code>server</code> <dd> <p>An optional hash of desired initial options</p> </dd></dl> <div class="method-source-code" id="new-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 37</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">pstack</span>, <span class="ruby-identifier">server</span>) <span class="ruby-keyword">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-value">:normal</span> <span class="ruby-comment"># Parse mode :normal, :cmd, :cr</span> <span class="ruby-ivar">@state</span> = {} <span class="ruby-ivar">@sc</span> = <span class="ruby-keyword">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"># supported options which imply an initial</span> <span class="ruby-comment"># 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"># Number of tries at negotitating sub options</span> <span class="ruby-ivar">@synch</span> = <span class="ruby-keyword">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">end</span></pre> </div><!-- new-source --> </div> </div><!-- new-method --> </section><!-- public-class-method-details --> <section id="public-instance-5Buntitled-5D-method-details" class="method-section section"> <h3 class="section-header">Public Instance Methods</h3> <div id="method-i-desired-3F" class="method-detail "> <div class="method-heading"> <span class="method-name">desired?</span><span class="method-args">(opt)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>Test to see which state we prefer this option to be in</p> <dl class="rdoc-list label-list"><dt><code>opt</code> <dd> <p>The Telnet option code</p> </dd></dl> <div class="method-source-code" id="desired-3F-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 286</span> <span class="ruby-keyword">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">false</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">st</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-identifier">st</span> <span class="ruby-keyword">end</span></pre> </div><!-- desired-3F-source --> </div> </div><!-- desired-3F-method --> <div id="method-i-echo" class="method-detail "> <div class="method-heading"> <span class="method-name">echo</span><span class="method-args">(ch)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>Handle server-side echo</p> <dl class="rdoc-list label-list"><dt><code>ch</code> <dd> <p>character string to echo</p> </dd></dl> <div class="method-source-code" id="echo-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 294</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">echo</span>(<span class="ruby-identifier">ch</span>) <span class="ruby-keyword">return</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@server</span>.<span class="ruby-identifier">service_type</span> <span class="ruby-operator">==</span> <span class="ruby-value">:client</span> <span class="ruby-comment"># Never echo for server when client</span> <span class="ruby-comment"># Remove this if it makes sense for peer to peer</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">echo_on</span> <span class="ruby-keyword">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-identifier">getbyte</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-string">'*'</span>,<span class="ruby-value">0</span>) <span class="ruby-keyword">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">end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">end</span></pre> </div><!-- echo-source --> </div> </div><!-- echo-method --> <div id="method-i-enabled-3F" class="method-detail "> <div class="method-heading"> <span class="method-name">enabled?</span><span class="method-args">(opt, who)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>Test to see if option is enabled</p> <dl class="rdoc-list label-list"><dt><code>opt</code> <dd> <p>The Telnet option code</p> </dd><dt><code>who</code> <dd> <p>The side to check :us or :him</p> </dd></dl> <div class="method-source-code" id="enabled-3F-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 278</span> <span class="ruby-keyword">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-value">:yes</span> <span class="ruby-operator">?</span> <span class="ruby-keyword">true</span> <span class="ruby-operator">:</span> <span class="ruby-keyword">false</span> <span class="ruby-keyword">end</span></pre> </div><!-- enabled-3F-source --> </div> </div><!-- enabled-3F-method --> <div id="method-i-filter_in" class="method-detail "> <div class="method-heading"> <span class="method-name">filter_in</span><span class="method-args">(str)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>The <a href="TelnetFilter.html#method-i-filter_in">#filter_in</a> method filters input data</p> <dl class="rdoc-list label-list"><dt><code>str</code> <dd> <p>The string to be processed</p> </dd><dt><code>return</code> <dd> <p>The filtered data</p> </dd></dl> <div class="method-source-code" id="filter_in-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 84</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">filter_in</span>(<span class="ruby-identifier">str</span>) <span class="ruby-comment"># init_subneg</span> <span class="ruby-keyword">return</span> <span class="ruby-string">""</span> <span class="ruby-keyword">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-string">""</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">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"># OOB sync data</span> <span class="ruby-keyword">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-identifier">getbyte</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">false</span> <span class="ruby-ivar">@synch</span> = <span class="ruby-keyword">true</span> <span class="ruby-keyword">break</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">case</span> <span class="ruby-identifier">mode?</span> <span class="ruby-keyword">when</span> <span class="ruby-value">:normal</span> <span class="ruby-keyword">case</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">CR</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@synch</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:cr</span>) <span class="ruby-keyword">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">binary_on</span> <span class="ruby-keyword">when</span> <span class="ruby-constant">LF</span> <span class="ruby-comment"># LF or LF/CR may be issued by broken mud servers and clients</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@synch</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:lf</span>) <span class="ruby-keyword">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">when</span> <span class="ruby-constant">IAC</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:cmd</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">NUL</span> <span class="ruby-comment"># ignore NULs in stream when in normal mode</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@synch</span> <span class="ruby-keyword">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">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">end</span> <span class="ruby-keyword">when</span> <span class="ruby-constant">BS</span>, <span class="ruby-constant">DEL</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@synch</span> <span class="ruby-comment"># 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">else</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@synch</span> <span class="ruby-comment">### NOTE - we will allow 8-bit NVT against RFC 1123 recommendation "should not"</span> <span class="ruby-comment">###</span> <span class="ruby-comment"># Only let 7-bit values through in normal mode</span> <span class="ruby-comment">#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">#else</span> <span class="ruby-comment"># log.debug("(#{@pstack.conn.object_id}) unexpected 8-bit byte found in stream '#{b[0]}'")</span> <span class="ruby-comment">#end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">when</span> <span class="ruby-value">:cr</span> <span class="ruby-comment"># handle CRLF and CRNUL by insertion of LF into buffer</span> <span class="ruby-keyword">case</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>) <span class="ruby-keyword">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">when</span> <span class="ruby-constant">NUL</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@server</span>.<span class="ruby-identifier">service_type</span> <span class="ruby-operator">==</span> <span class="ruby-value">:client</span> <span class="ruby-comment"># 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">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">end</span> <span class="ruby-keyword">else</span> <span class="ruby-comment"># 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">end</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">when</span> <span class="ruby-value">:lf</span> <span class="ruby-comment"># liberally handle LF, LFCR for clients that aren't telnet correct</span> <span class="ruby-keyword">case</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">CR</span> <span class="ruby-comment"># Handle LFCR by swallowing CR</span> <span class="ruby-keyword">else</span> <span class="ruby-comment"># 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">end</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">when</span> <span class="ruby-value">:cmd</span> <span class="ruby-keyword">case</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">IAC</span> <span class="ruby-comment"># 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-value">:normal</span>) <span class="ruby-keyword">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-string">"TeensyMUD is here.\n"</span>,<span class="ruby-value">0</span>) <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">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-value">:normal</span>) <span class="ruby-keyword">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-value">:normal</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">GA</span>, <span class="ruby-constant">NOP</span>, <span class="ruby-constant">BRK</span> <span class="ruby-comment"># 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-value">:normal</span>) <span class="ruby-keyword">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">false</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">EC</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">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">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">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">end</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">EL</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">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-string">"\n"</span>) <span class="ruby-keyword">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">else</span> <span class="ruby-identifier">buf</span> = <span class="ruby-string">""</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-string">"\n"</span>) <span class="ruby-keyword">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">end</span> <span class="ruby-keyword">end</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">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">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">break</span> <span class="ruby-keyword">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">case</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">WILL</span> <span class="ruby-identifier">replies_him</span>(<span class="ruby-identifier">opt</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>),<span class="ruby-keyword">true</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">WONT</span> <span class="ruby-identifier">replies_him</span>(<span class="ruby-identifier">opt</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>),<span class="ruby-keyword">false</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">DO</span> <span class="ruby-identifier">requests_us</span>(<span class="ruby-identifier">opt</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>),<span class="ruby-keyword">true</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">DONT</span> <span class="ruby-identifier">requests_us</span>(<span class="ruby-identifier">opt</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>),<span class="ruby-keyword">false</span>) <span class="ruby-keyword">end</span> <span class="ruby-comment"># Update interesting things in ProtocolStack after negotiation</span> <span class="ruby-keyword">case</span> <span class="ruby-identifier">opt</span>.<span class="ruby-identifier">getbyte</span>(<span class="ruby-value">0</span>) <span class="ruby-keyword">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-value">:us</span>) <span class="ruby-keyword">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-value">:us</span>) <span class="ruby-keyword">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-value">:us</span>) <span class="ruby-keyword">end</span> <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">when</span> <span class="ruby-constant">SB</span> <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">unscan</span> <span class="ruby-keyword">break</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">check_until</span>(<span class="ruby-node">%r#{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">%r#{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-identifier">getbyte</span>(<span class="ruby-value">0</span>),<span class="ruby-identifier">data</span>) <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">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.getbyte(0)}"</span>) <span class="ruby-identifier">set_mode</span>(<span class="ruby-value">:normal</span>) <span class="ruby-keyword">end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">end</span> <span class="ruby-comment"># while b</span> <span class="ruby-ivar">@sc</span> = <span class="ruby-keyword">nil</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@sc</span>.<span class="ruby-identifier">eos?</span> <span class="ruby-identifier">buf</span> <span class="ruby-keyword">end</span></pre> </div><!-- filter_in-source --> </div> </div><!-- filter_in-method --> <div id="method-i-filter_out" class="method-detail "> <div class="method-heading"> <span class="method-name">filter_out</span><span class="method-args">(str)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>The <a href="TelnetFilter.html#method-i-filter_out">#filter_out</a> method filters output data</p> <dl class="rdoc-list label-list"><dt><code>str</code> <dd> <p>The string to be processed</p> </dd><dt><code>return</code> <dd> <p>The filtered data</p> </dd></dl> <div class="method-source-code" id="filter_out-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 265</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">filter_out</span>(<span class="ruby-identifier">str</span>) <span class="ruby-keyword">return</span> <span class="ruby-string">''</span> <span class="ruby-keyword">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">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">%r\n/</span>, <span class="ruby-string">"\r\n"</span>) <span class="ruby-keyword">end</span> <span class="ruby-identifier">str</span> <span class="ruby-keyword">end</span></pre> </div><!-- filter_out-source --> </div> </div><!-- filter_out-method --> <div id="method-i-init" class="method-detail "> <div class="method-heading"> <span class="method-name">init</span><span class="method-args">(args)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>Negotiate starting wanted options</p> <dl class="rdoc-list label-list"><dt><code>args</code> <dd> <p>Optional initial options</p> </dd></dl> <div class="method-source-code" id="init-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 56</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">init</span>(<span class="ruby-identifier">args</span>) <span class="ruby-keyword">if</span> <span class="ruby-ivar">@server</span>.<span class="ruby-identifier">service_type</span> <span class="ruby-operator">==</span> <span class="ruby-value">:client</span> <span class="ruby-comment"># let server offer and ask for client</span> <span class="ruby-comment"># 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">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">case</span> <span class="ruby-identifier">key</span> <span class="ruby-keyword">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">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">end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">else</span> <span class="ruby-comment"># 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">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">case</span> <span class="ruby-identifier">key</span> <span class="ruby-keyword">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">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">end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">true</span> <span class="ruby-keyword">end</span></pre> </div><!-- init-source --> </div> </div><!-- init-method --> <div id="method-i-init_subneg" class="method-detail "> <div class="method-heading"> <span class="method-name">init_subneg</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <p>Negotiate starting wanted options that imply subnegotation So far only terminal type</p> <div class="method-source-code" id="init_subneg-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 308</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">init_subneg</span> <span class="ruby-keyword">return</span> <span class="ruby-keyword">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">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">opt</span><span class="ruby-operator">|</span> <span class="ruby-keyword">next</span> <span class="ruby-keyword">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">case</span> <span class="ruby-identifier">opt</span> <span class="ruby-keyword">when</span> <span class="ruby-constant">TTYPE</span> <span class="ruby-identifier">who</span> = <span class="ruby-value">:him</span> <span class="ruby-keyword">else</span> <span class="ruby-identifier">who</span> = <span class="ruby-value">:us</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">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">case</span> <span class="ruby-identifier">opt</span> <span class="ruby-keyword">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">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">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">end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">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">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">terminal</span> <span class="ruby-keyword">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-string">"dumb"</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">end</span> <span class="ruby-keyword">end</span></pre> </div><!-- init_subneg-source --> </div> </div><!-- init_subneg-method --> <div id="method-i-send_naws" class="method-detail "> <div class="method-heading"> <span class="method-name">send_naws</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <div class="method-source-code" id="send_naws-source"> <pre><span class="ruby-comment"># File lib/network/protocol/telnetfilter.rb, line 353</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">send_naws</span> <span class="ruby-keyword">return</span> <span class="ruby-keyword">if</span> <span class="ruby-operator">!</span><span class="ruby-identifier">enabled?</span>(<span class="ruby-constant">NAWS</span>, <span class="ruby-value">:us</span>) <span class="ruby-identifier">ts</span> = <span class="ruby-ivar">@pstack</span>.<span class="ruby-identifier">query</span>(<span class="ruby-value">: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-string">'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-string">'n'</span>) <span class="ruby-identifier">data</span>.<span class="ruby-identifier">gsub!</span>(<span class="ruby-node">%r#{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"># 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">end</span></pre> </div><!-- send_naws-source --> </div> </div><!-- send_naws-method --> </section><!-- public-instance-method-details --> </section><!-- 5Buntitled-5D --> </div><!-- documentation --> <footer id="validator-badges"> <p><a href="http://validator.w3.org/check/referer">[Validate]</a> <p>Generated by <a href="https://github.com/rdoc/rdoc">RDoc</a> 3.12.1. <p>Generated with the <a href="http://deveiate.org/projects/Darkfish-Rdoc/">Darkfish Rdoc Generator</a> 3. </footer>