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<h1>TorSocket.cpp</h1><a href="_tor_socket_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">** This file is part of Vidalia, and is subject to the license terms in the</span>
<a name="l00003"></a>00003 <span class="comment">** LICENSE file, found in the top level directory of this distribution. If you</span>
<a name="l00004"></a>00004 <span class="comment">** did not receive the LICENSE file with this file, you may obtain it from the</span>
<a name="l00005"></a>00005 <span class="comment">** Vidalia source package distributed by the Vidalia Project at</span>
<a name="l00006"></a>00006 <span class="comment">** http://www.vidalia-project.net/. No part of Vidalia, including this file,</span>
<a name="l00007"></a>00007 <span class="comment">** may be copied, modified, propagated, or distributed except according to the</span>
<a name="l00008"></a>00008 <span class="comment">** terms described in the LICENSE file.</span>
<a name="l00009"></a>00009 <span class="comment">*/</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="comment">/*</span>
<a name="l00012"></a>00012 <span class="comment">** \file TorSocket.cpp</span>
<a name="l00013"></a>00013 <span class="comment">** \version $Id: TorSocket.cpp 3735 2009-04-28 20:28:01Z edmanm $</span>
<a name="l00014"></a>00014 <span class="comment">** \brief A QTcpSocket that makes requests over Tor</span>
<a name="l00015"></a>00015 <span class="comment">*/</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#include "<a class="code" href="_tor_socket_8h.html">TorSocket.h</a>"</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include <QDataStream></span>
<a name="l00020"></a>00020
<a name="l00021"></a><a class="code" href="_tor_socket_8cpp.html#aec2207ebdfe333d4b66767d2e718e504">00021</a> <span class="preprocessor">#define SOCKS_VERSION 0x04 </span><span class="comment">/**< SOCKS version. */</span>
<a name="l00022"></a><a class="code" href="_tor_socket_8cpp.html#ae518e387a5fac006a144ef146b80e940">00022</a> <span class="preprocessor">#define SOCKS_CONNECT 0x01 </span><span class="comment">/**< SOCKS connect command ID. */</span>
<a name="l00023"></a><a class="code" href="_tor_socket_8cpp.html#a3eceaad37b33fa1d76982a03938868cc">00023</a> <span class="preprocessor">#define SOCKS_FAKE_IP 0x00000001 </span><span class="comment">/**< Bogus IP. */</span>
<a name="l00024"></a><a class="code" href="_tor_socket_8cpp.html#af67beb446e54b08723cc44003b5306cd">00024</a> <span class="preprocessor">#define SOCKS_RESPONSE_LEN 0x08 </span><span class="comment">/**< SOCKS server response length. */</span>
<a name="l00025"></a><a class="code" href="_tor_socket_8cpp.html#a47ff836905cf2a242403e48c88caf82c">00025</a> <span class="preprocessor">#define SOCKS_RESPONSE_VERSION 0x00 </span><span class="comment">/**< SOCKS server response version. */</span>
<a name="l00026"></a><a class="code" href="_tor_socket_8cpp.html#a94dc767181c79544cfb04f11503d3574">00026</a> <span class="preprocessor">#define SOCKS_CONNECT_STATUS_OK 0x5A </span><span class="comment">/**< SOCKS server response status. */</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="comment"></span>
<a name="l00029"></a>00029 <span class="comment">/** Constructor. */</span>
<a name="l00030"></a><a class="code" href="class_tor_socket.html#a2c3fe12ba28708bc074758c869910ea8">00030</a> <a class="code" href="class_tor_socket.html#a2c3fe12ba28708bc074758c869910ea8">TorSocket::TorSocket</a>(<span class="keyword">const</span> QHostAddress &socksAddr,
<a name="l00031"></a>00031 quint16 socksPort, QObject *parent)
<a name="l00032"></a>00032 : QTcpSocket(parent),
<a name="l00033"></a>00033 _socksAddr(socksAddr),
<a name="l00034"></a>00034 _socksPort(socksPort)
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036 QObject::connect(<span class="keyword">this</span>, SIGNAL(<a class="code" href="namespacetc.html#aa7353218fd7baef0876bbb422ce818af">error</a>(QAbstractSocket::SocketError)),
<a name="l00037"></a>00037 <span class="keyword">this</span>, SLOT(<a class="code" href="class_tor_socket.html#ac2ebd30cfcfb4dc7985937995f9ff9e4">onError</a>(QAbstractSocket::SocketError)));
<a name="l00038"></a>00038 QObject::connect(<span class="keyword">this</span>, SIGNAL(readyRead()),
<a name="l00039"></a>00039 <span class="keyword">this</span>, SLOT(<a class="code" href="class_tor_socket.html#a0abb454dac783244f04ca638f7731324">onHandshakeResponse</a>()));
<a name="l00040"></a>00040 QObject::connect(<span class="keyword">this</span>, SIGNAL(connected()),
<a name="l00041"></a>00041 <span class="keyword">this</span>, SLOT(<a class="code" href="class_tor_socket.html#a52a0e8f20ee1f5f30129e9bb2d4eef30">connectedToProxy</a>()));
<a name="l00042"></a>00042 }
<a name="l00043"></a>00043 <span class="comment"></span>
<a name="l00044"></a>00044 <span class="comment">/** Connects to the specified hostname and port via Tor. */</span>
<a name="l00045"></a>00045 <span class="keywordtype">void</span>
<a name="l00046"></a><a class="code" href="class_tor_socket.html#aeefa68b127c44d6b7d8e865c5f34937e">00046</a> <a class="code" href="class_tor_socket.html#aeefa68b127c44d6b7d8e865c5f34937e">TorSocket::connectToRemoteHost</a>(<span class="keyword">const</span> QString &remoteHost, quint16 remotePort)
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048 <a class="code" href="class_tor_socket.html#af1da7a0e54cb24ec84a259ff9ac63829">_remoteHost</a> = remoteHost;
<a name="l00049"></a>00049 <a class="code" href="class_tor_socket.html#a7c4a5eb766c49e8ff4ff3ac75f1c0fcd">_remotePort</a> = remotePort;
<a name="l00050"></a>00050 QTcpSocket::connectToHost(<a class="code" href="class_tor_socket.html#a94fe00f32b7bb997039dec85134e83ab">_socksAddr</a>, <a class="code" href="class_tor_socket.html#abc4b49aee6b4d6c20c42244d4d3f1c9f">_socksPort</a>);
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052 <span class="comment"></span>
<a name="l00053"></a>00053 <span class="comment">/** Called when a connection error has occurred. */</span>
<a name="l00054"></a>00054 <span class="keywordtype">void</span>
<a name="l00055"></a><a class="code" href="class_tor_socket.html#ac2ebd30cfcfb4dc7985937995f9ff9e4">00055</a> <a class="code" href="class_tor_socket.html#ac2ebd30cfcfb4dc7985937995f9ff9e4">TorSocket::onError</a>(QAbstractSocket::SocketError <a class="code" href="namespacetc.html#aa7353218fd7baef0876bbb422ce818af">error</a>)
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057 Q_UNUSED(error);
<a name="l00058"></a>00058 emit <a class="code" href="class_tor_socket.html#a573f63392d7ccae616420b8ccb8c65ef">socketError</a>(errorString());
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060 <span class="comment"></span>
<a name="l00061"></a>00061 <span class="comment">/** Called when the socket is connected to the proxy and sends our</span>
<a name="l00062"></a>00062 <span class="comment"> * half of a Socks4a handshake. */</span>
<a name="l00063"></a>00063 <span class="keywordtype">void</span>
<a name="l00064"></a><a class="code" href="class_tor_socket.html#a52a0e8f20ee1f5f30129e9bb2d4eef30">00064</a> <a class="code" href="class_tor_socket.html#a52a0e8f20ee1f5f30129e9bb2d4eef30">TorSocket::connectedToProxy</a>()
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066 <a class="code" href="class_tor_socket.html#a19f1d9a000e2be1d9cd35cd343268781">sendSocksHandshake</a>(<a class="code" href="class_tor_socket.html#af1da7a0e54cb24ec84a259ff9ac63829">_remoteHost</a>, <a class="code" href="class_tor_socket.html#a7c4a5eb766c49e8ff4ff3ac75f1c0fcd">_remotePort</a>);
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068 <span class="comment"></span>
<a name="l00069"></a>00069 <span class="comment">/** Sends the first part of a Socks4a handshake, using the remote hostname and</span>
<a name="l00070"></a>00070 <span class="comment"> * port specified in the previous call to connectToHost(). The message should</span>
<a name="l00071"></a>00071 <span class="comment"> * be formatted as follows:</span>
<a name="l00072"></a>00072 <span class="comment"> *</span>
<a name="l00073"></a>00073 <span class="comment"> * 0x04 (socks version)</span>
<a name="l00074"></a>00074 <span class="comment"> * 0x01 (connect)</span>
<a name="l00075"></a>00075 <span class="comment"> * PORT (two bytes, most significant byte first)</span>
<a name="l00076"></a>00076 <span class="comment"> * 0x00 0x00 0x00 0x01 (fake IP address: tells proxy to use SOCKS4a)</span>
<a name="l00077"></a>00077 <span class="comment"> * 0x00 (empty username field)</span>
<a name="l00078"></a>00078 <span class="comment"> * HOSTNAME (target hostname)</span>
<a name="l00079"></a>00079 <span class="comment"> * 0x00 (marks the end of the hostname field)</span>
<a name="l00080"></a>00080 <span class="comment"> */</span>
<a name="l00081"></a>00081 <span class="keywordtype">void</span>
<a name="l00082"></a><a class="code" href="class_tor_socket.html#a19f1d9a000e2be1d9cd35cd343268781">00082</a> <a class="code" href="class_tor_socket.html#a19f1d9a000e2be1d9cd35cd343268781">TorSocket::sendSocksHandshake</a>(<span class="keyword">const</span> QString &remoteHost, quint16 remotePort)
<a name="l00083"></a>00083 {
<a name="l00084"></a>00084 QDataStream sock(<span class="keyword">this</span>);
<a name="l00085"></a>00085 sock << (quint8)<a class="code" href="_tor_socket_8cpp.html#aec2207ebdfe333d4b66767d2e718e504">SOCKS_VERSION</a>;
<a name="l00086"></a>00086 sock << (quint8)<a class="code" href="_tor_socket_8cpp.html#ae518e387a5fac006a144ef146b80e940">SOCKS_CONNECT</a>;
<a name="l00087"></a>00087 sock << (quint16)remotePort;
<a name="l00088"></a>00088 sock << (quint32)<a class="code" href="_tor_socket_8cpp.html#a3eceaad37b33fa1d76982a03938868cc">SOCKS_FAKE_IP</a>;
<a name="l00089"></a>00089 sock << (quint8)0;
<a name="l00090"></a>00090 sock.writeRawData(qPrintable(remoteHost), remoteHost.length());
<a name="l00091"></a>00091 sock << (quint8)0;
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093 <span class="comment"></span>
<a name="l00094"></a>00094 <span class="comment">/** Handles the second half of the handshake, received from the SOCKS </span>
<a name="l00095"></a>00095 <span class="comment"> * proxy server. The response should be formatted as follows: </span>
<a name="l00096"></a>00096 <span class="comment"> * </span>
<a name="l00097"></a>00097 <span class="comment"> * 0x00 (response version)</span>
<a name="l00098"></a>00098 <span class="comment"> * STATUS (0x5A means success; other values mean failure)</span>
<a name="l00099"></a>00099 <span class="comment"> * PORT (not set)</span>
<a name="l00100"></a>00100 <span class="comment"> * ADDRESS (not set)</span>
<a name="l00101"></a>00101 <span class="comment"> */</span>
<a name="l00102"></a>00102 <span class="keywordtype">void</span>
<a name="l00103"></a><a class="code" href="class_tor_socket.html#a0abb454dac783244f04ca638f7731324">00103</a> <a class="code" href="class_tor_socket.html#a0abb454dac783244f04ca638f7731324">TorSocket::onHandshakeResponse</a>()
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 QByteArray response;
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (bytesAvailable() >= <a class="code" href="_tor_socket_8cpp.html#af67beb446e54b08723cc44003b5306cd">SOCKS_RESPONSE_LEN</a>) {
<a name="l00107"></a>00107 <span class="comment">/* We've received our response, so stop waiting for it. */</span>
<a name="l00108"></a>00108 QObject::disconnect(<span class="keyword">this</span>, SIGNAL(readyRead()),
<a name="l00109"></a>00109 <span class="keyword">this</span>, SLOT(<a class="code" href="class_tor_socket.html#a0abb454dac783244f04ca638f7731324">onHandshakeResponse</a>()));
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="comment">/* Read the 8-byte response off the socket. */</span>
<a name="l00112"></a>00112 response = read(<a class="code" href="_tor_socket_8cpp.html#af67beb446e54b08723cc44003b5306cd">SOCKS_RESPONSE_LEN</a>);
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">/* Check to make sure we got a good response from the proxy. */</span>
<a name="l00115"></a>00115 <span class="keywordflow">if</span> ((uchar)response[0] == (uchar)<a class="code" href="_tor_socket_8cpp.html#a47ff836905cf2a242403e48c88caf82c">SOCKS_RESPONSE_VERSION</a> &&
<a name="l00116"></a>00116 (uchar)response[1] == (uchar)<a class="code" href="_tor_socket_8cpp.html#a94dc767181c79544cfb04f11503d3574">SOCKS_CONNECT_STATUS_OK</a>) {
<a name="l00117"></a>00117 <span class="comment">/* Connection status was okay. */</span>
<a name="l00118"></a>00118 emit <a class="code" href="class_tor_socket.html#a294e9d079c0745328e13aafe1d5672ca">connectedToRemoteHost</a>();
<a name="l00119"></a>00119 } <span class="keywordflow">else</span> {
<a name="l00120"></a>00120 <span class="comment">/* Remote connection failed, so close the connection to the proxy. */</span>
<a name="l00121"></a>00121 disconnectFromHost();
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125
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