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| <a name="1" href="#1">1</a> <em class="jxr_comment">/*</em> |
| <a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em> |
| <a name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em> |
| <a name="9" href="#9">9</a> <em class="jxr_comment"> *</em> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> *</em> |
| <a name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em> |
| <a name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em> |
| <a name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em> |
| <a name="18" href="#18">18</a> <em class="jxr_comment"> *</em> |
| <a name="19" href="#19">19</a> <em class="jxr_comment"> */</em> |
| <a name="20" href="#20">20</a> <strong class="jxr_keyword">package</strong> org.apache.mina.proxy.handlers.socks; |
| <a name="21" href="#21">21</a> |
| <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.buffer.IoBuffer; |
| <a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.filterchain.IoFilter.NextFilter; |
| <a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> org.apache.mina.proxy.session.ProxyIoSession; |
| <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.mina.proxy.utils.ByteUtilities; |
| <a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.slf4j.Logger; |
| <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory; |
| <a name="28" href="#28">28</a> |
| <a name="29" href="#29">29</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="30" href="#30">30</a> <em class="jxr_javadoccomment"> * Socks4LogicHandler.java - SOCKS4/SOCKS4a authentication mechanisms logic handler.</em> |
| <a name="31" href="#31">31</a> <em class="jxr_javadoccomment"> * </em> |
| <a name="32" href="#32">32</a> <em class="jxr_javadoccomment"> * @author <a href="<a href="http://mina.apache.org" target="alexandria_uri">http://mina.apache.org</a>">Apache MINA Project</a></em> |
| <a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * @since MINA 2.0.0-M3</em> |
| <a name="34" href="#34">34</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="35" href="#35">35</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> Socks4LogicHandler <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/mina/proxy/handlers/socks/AbstractSocksLogicHandler.html">AbstractSocksLogicHandler</a> { |
| <a name="36" href="#36">36</a> |
| <a name="37" href="#37">37</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">static</strong> Logger logger = LoggerFactory |
| <a name="38" href="#38">38</a> .getLogger(Socks4LogicHandler.<strong class="jxr_keyword">class</strong>); |
| <a name="39" href="#39">39</a> |
| <a name="40" href="#40">40</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * {@inheritDoc}</em> |
| <a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="43" href="#43">43</a> <strong class="jxr_keyword">public</strong> Socks4LogicHandler(<strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/mina/proxy/session/ProxyIoSession.html">ProxyIoSession</a> proxyIoSession) { |
| <a name="44" href="#44">44</a> <strong class="jxr_keyword">super</strong>(proxyIoSession); |
| <a name="45" href="#45">45</a> } |
| <a name="46" href="#46">46</a> |
| <a name="47" href="#47">47</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> * Perform the handshake.</em> |
| <a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> * </em> |
| <a name="50" href="#50">50</a> <em class="jxr_javadoccomment"> * @param nextFilter the next filter</em> |
| <a name="51" href="#51">51</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="52" href="#52">52</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> doHandshake(<strong class="jxr_keyword">final</strong> NextFilter nextFilter) { |
| <a name="53" href="#53">53</a> logger.debug(<span class="jxr_string">" doHandshake()"</span>); |
| <a name="54" href="#54">54</a> |
| <a name="55" href="#55">55</a> <em class="jxr_comment">// Send request</em> |
| <a name="56" href="#56">56</a> writeRequest(nextFilter, request); |
| <a name="57" href="#57">57</a> } |
| <a name="58" href="#58">58</a> |
| <a name="59" href="#59">59</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="60" href="#60">60</a> <em class="jxr_javadoccomment"> * Encode a SOCKS4/SOCKS4a request and writes it to the next filter</em> |
| <a name="61" href="#61">61</a> <em class="jxr_javadoccomment"> * so it can be sent to the proxy server.</em> |
| <a name="62" href="#62">62</a> <em class="jxr_javadoccomment"> * </em> |
| <a name="63" href="#63">63</a> <em class="jxr_javadoccomment"> * @param nextFilter the next filter</em> |
| <a name="64" href="#64">64</a> <em class="jxr_javadoccomment"> * @param request the request to send.</em> |
| <a name="65" href="#65">65</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="66" href="#66">66</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> writeRequest(<strong class="jxr_keyword">final</strong> NextFilter nextFilter, |
| <a name="67" href="#67">67</a> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/mina/proxy/handlers/socks/SocksProxyRequest.html">SocksProxyRequest</a> request) { |
| <a name="68" href="#68">68</a> <strong class="jxr_keyword">try</strong> { |
| <a name="69" href="#69">69</a> <strong class="jxr_keyword">boolean</strong> isV4ARequest = request.getHost() != <strong class="jxr_keyword">null</strong>; |
| <a name="70" href="#70">70</a> byte[] userID = request.getUserName().getBytes(<span class="jxr_string">"ASCII"</span>); |
| <a name="71" href="#71">71</a> byte[] host = isV4ARequest ? request.getHost().getBytes(<span class="jxr_string">"ASCII"</span>) |
| <a name="72" href="#72">72</a> : <strong class="jxr_keyword">null</strong>; |
| <a name="73" href="#73">73</a> |
| <a name="74" href="#74">74</a> <strong class="jxr_keyword">int</strong> len = 9 + userID.length; |
| <a name="75" href="#75">75</a> |
| <a name="76" href="#76">76</a> <strong class="jxr_keyword">if</strong> (isV4ARequest) { |
| <a name="77" href="#77">77</a> len += host.length + 1; |
| <a name="78" href="#78">78</a> } |
| <a name="79" href="#79">79</a> |
| <a name="80" href="#80">80</a> <a href="../../../../../../org/apache/mina/core/buffer/IoBuffer.html">IoBuffer</a> buf = IoBuffer.allocate(len); |
| <a name="81" href="#81">81</a> |
| <a name="82" href="#82">82</a> buf.put(request.getProtocolVersion()); |
| <a name="83" href="#83">83</a> buf.put(request.getCommandCode()); |
| <a name="84" href="#84">84</a> buf.put(request.getPort()); |
| <a name="85" href="#85">85</a> buf.put(request.getIpAddress()); |
| <a name="86" href="#86">86</a> buf.put(userID); |
| <a name="87" href="#87">87</a> buf.put(SocksProxyConstants.TERMINATOR); |
| <a name="88" href="#88">88</a> |
| <a name="89" href="#89">89</a> <strong class="jxr_keyword">if</strong> (isV4ARequest) { |
| <a name="90" href="#90">90</a> buf.put(host); |
| <a name="91" href="#91">91</a> buf.put(SocksProxyConstants.TERMINATOR); |
| <a name="92" href="#92">92</a> } |
| <a name="93" href="#93">93</a> |
| <a name="94" href="#94">94</a> <strong class="jxr_keyword">if</strong> (isV4ARequest) { |
| <a name="95" href="#95">95</a> logger.debug(<span class="jxr_string">" sending SOCKS4a request"</span>); |
| <a name="96" href="#96">96</a> } <strong class="jxr_keyword">else</strong> { |
| <a name="97" href="#97">97</a> logger.debug(<span class="jxr_string">" sending SOCKS4 request"</span>); |
| <a name="98" href="#98">98</a> } |
| <a name="99" href="#99">99</a> |
| <a name="100" href="#100">100</a> buf.flip(); |
| <a name="101" href="#101">101</a> writeData(nextFilter, buf); |
| <a name="102" href="#102">102</a> } <strong class="jxr_keyword">catch</strong> (Exception ex) { |
| <a name="103" href="#103">103</a> closeSession(<span class="jxr_string">"Unable to send Socks request: "</span>, ex); |
| <a name="104" href="#104">104</a> } |
| <a name="105" href="#105">105</a> } |
| <a name="106" href="#106">106</a> |
| <a name="107" href="#107">107</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="108" href="#108">108</a> <em class="jxr_javadoccomment"> * Handle incoming data during the handshake process. Should consume only the</em> |
| <a name="109" href="#109">109</a> <em class="jxr_javadoccomment"> * handshake data from the buffer, leaving any extra data in place.</em> |
| <a name="110" href="#110">110</a> <em class="jxr_javadoccomment"> * </em> |
| <a name="111" href="#111">111</a> <em class="jxr_javadoccomment"> * @param nextFilter the next filter</em> |
| <a name="112" href="#112">112</a> <em class="jxr_javadoccomment"> * @param buf the server response data buffer</em> |
| <a name="113" href="#113">113</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="114" href="#114">114</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(<strong class="jxr_keyword">final</strong> NextFilter nextFilter, |
| <a name="115" href="#115">115</a> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/mina/core/buffer/IoBuffer.html">IoBuffer</a> buf) { |
| <a name="116" href="#116">116</a> <strong class="jxr_keyword">try</strong> { |
| <a name="117" href="#117">117</a> <strong class="jxr_keyword">if</strong> (buf.remaining() >= SocksProxyConstants.SOCKS_4_RESPONSE_SIZE) { |
| <a name="118" href="#118">118</a> handleResponse(buf); |
| <a name="119" href="#119">119</a> } |
| <a name="120" href="#120">120</a> } <strong class="jxr_keyword">catch</strong> (Exception ex) { |
| <a name="121" href="#121">121</a> closeSession(<span class="jxr_string">"Proxy handshake failed: "</span>, ex); |
| <a name="122" href="#122">122</a> } |
| <a name="123" href="#123">123</a> } |
| <a name="124" href="#124">124</a> |
| <a name="125" href="#125">125</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="126" href="#126">126</a> <em class="jxr_javadoccomment"> * Handle a SOCKS4/SOCKS4a response from the proxy server. Test</em> |
| <a name="127" href="#127">127</a> <em class="jxr_javadoccomment"> * the response buffer reply code and call {@link #setHandshakeComplete()}</em> |
| <a name="128" href="#128">128</a> <em class="jxr_javadoccomment"> * if access is granted.</em> |
| <a name="129" href="#129">129</a> <em class="jxr_javadoccomment"> * </em> |
| <a name="130" href="#130">130</a> <em class="jxr_javadoccomment"> * @param buf the buffer holding the server response data.</em> |
| <a name="131" href="#131">131</a> <em class="jxr_javadoccomment"> * @throws exception if server response is malformed or if request is rejected</em> |
| <a name="132" href="#132">132</a> <em class="jxr_javadoccomment"> * by the proxy server.</em> |
| <a name="133" href="#133">133</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="134" href="#134">134</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> handleResponse(<strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/mina/core/buffer/IoBuffer.html">IoBuffer</a> buf) <strong class="jxr_keyword">throws</strong> Exception { |
| <a name="135" href="#135">135</a> byte first = buf.get(0); |
| <a name="136" href="#136">136</a> |
| <a name="137" href="#137">137</a> <strong class="jxr_keyword">if</strong> (first != 0) { |
| <a name="138" href="#138">138</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> Exception(<span class="jxr_string">"Socks response seems to be malformed"</span>); |
| <a name="139" href="#139">139</a> } |
| <a name="140" href="#140">140</a> |
| <a name="141" href="#141">141</a> byte status = buf.get(1); |
| <a name="142" href="#142">142</a> |
| <a name="143" href="#143">143</a> <em class="jxr_comment">// Consumes all the response data from the buffer</em> |
| <a name="144" href="#144">144</a> buf.position(buf.position() + SocksProxyConstants.SOCKS_4_RESPONSE_SIZE); |
| <a name="145" href="#145">145</a> |
| <a name="146" href="#146">146</a> <strong class="jxr_keyword">if</strong> (status == SocksProxyConstants.V4_REPLY_REQUEST_GRANTED) { |
| <a name="147" href="#147">147</a> setHandshakeComplete(); |
| <a name="148" href="#148">148</a> } <strong class="jxr_keyword">else</strong> { |
| <a name="149" href="#149">149</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> Exception(<span class="jxr_string">"Proxy handshake failed - Code: 0x"</span> |
| <a name="150" href="#150">150</a> + ByteUtilities.asHex(<strong class="jxr_keyword">new</strong> byte[] { status }) + <span class="jxr_string">" ("</span> |
| <a name="151" href="#151">151</a> + SocksProxyConstants.getReplyCodeAsString(status) + <span class="jxr_string">")"</span>); |
| <a name="152" href="#152">152</a> } |
| <a name="153" href="#153">153</a> } |
| <a name="154" href="#154">154</a> } |
| </pre> |
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