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annotate src/net/sourceforge/jsocks/CProxy.java @ 396:1f625669d89d
Added tag stable-1.9.0.6 for changeset 74d527fe7f5f
author | Carl Byington <carl@five-ten-sg.com> |
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date | Fri, 19 Sep 2014 15:27:51 -0700 |
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1 package net.sourceforge.jsocks; |
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2 import java.net.*; |
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3 import java.io.*; |
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4 import java.util.Hashtable; |
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5 import java.util.Enumeration; |
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6 |
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7 /** |
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8 Abstract class CProxy, base for classes Socks4Proxy and Socks5Proxy. |
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9 Defines methods for specifying default proxy, to be |
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10 used by all classes of this package. |
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11 */ |
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12 |
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13 public abstract class CProxy{ |
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14 |
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15 //Data members |
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16 protected InetRange directHosts = new InetRange(); |
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17 |
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18 protected InetAddress proxyIP = null; |
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19 protected String proxyHost = null; |
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20 protected int proxyPort; |
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21 protected Socket proxySocket = null; |
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22 |
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23 protected InputStream in; |
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24 protected OutputStream out; |
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25 |
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26 protected int version; |
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27 |
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28 protected CProxy chainProxy = null; |
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29 |
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30 |
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31 //Protected static/class variables |
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32 protected static CProxy defaultProxy = null; |
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33 |
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34 //Constructors |
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35 //==================== |
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36 CProxy(CProxy chainProxy, |
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37 String proxyHost,int proxyPort)throws UnknownHostException{ |
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38 this.chainProxy = chainProxy; |
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39 this.proxyHost = proxyHost; |
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40 |
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41 if(chainProxy == null) |
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42 this.proxyIP = InetAddress.getByName(proxyHost); |
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43 |
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44 this.proxyPort = proxyPort; |
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45 } |
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46 |
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47 |
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48 CProxy(String proxyHost,int proxyPort)throws UnknownHostException{ |
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49 this(null,proxyHost,proxyPort); |
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50 } |
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51 |
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52 CProxy(CProxy chainProxy,InetAddress proxyIP,int proxyPort){ |
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53 this.chainProxy = chainProxy; |
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54 this.proxyIP = proxyIP; |
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55 this.proxyPort = proxyPort; |
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56 } |
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57 |
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58 CProxy(InetAddress proxyIP,int proxyPort){ |
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59 this(null,proxyIP,proxyPort); |
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60 } |
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61 |
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62 CProxy(CProxy p){ |
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63 this.proxyIP = p.proxyIP; |
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64 this.proxyPort = p.proxyPort; |
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65 this.version = p.version; |
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66 this.directHosts = p.directHosts; |
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67 } |
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68 |
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69 //Public instance methods |
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70 //======================== |
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71 |
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72 /** |
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73 Get the port on which proxy server is running. |
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74 * @return CProxy port. |
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75 */ |
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76 public int getPort(){ |
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77 return proxyPort; |
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78 } |
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79 /** |
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80 Get the ip address of the proxy server host. |
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81 * @return CProxy InetAddress. |
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82 */ |
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83 public InetAddress getInetAddress(){ |
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84 return proxyIP; |
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85 } |
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86 /** |
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87 * Adds given ip to the list of direct addresses. |
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88 * This machine will be accessed without using proxy. |
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89 */ |
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90 public void addDirect(InetAddress ip){ |
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91 directHosts.add(ip); |
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92 } |
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93 /** |
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94 * Adds host to the list of direct addresses. |
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95 * This machine will be accessed without using proxy. |
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96 */ |
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97 public boolean addDirect(String host){ |
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98 return directHosts.add(host); |
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99 } |
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100 /** |
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101 * Adds given range of addresses to the lsit of direct addresses, |
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102 * machines within this range will be accessed without using proxy. |
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103 */ |
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104 public void addDirect(InetAddress from,InetAddress to){ |
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105 directHosts.add(from,to); |
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106 } |
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107 /** |
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108 * Sets given InetRange as the list of direct address, previous |
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109 * list will be discarded, any changes done previously with |
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110 * addDirect(Inetaddress) will be lost. |
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111 * The machines in this range will be accessed without using proxy. |
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112 * @param ir InetRange which should be used to look up direct addresses. |
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113 * @see InetRange |
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114 */ |
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115 public void setDirect(InetRange ir){ |
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116 directHosts = ir; |
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117 } |
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118 |
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119 /** |
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120 Get the list of direct hosts. |
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121 * @return Current range of direct address as InetRange object. |
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122 * @see InetRange |
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123 */ |
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124 public InetRange getDirect(){ |
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125 return directHosts; |
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126 } |
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127 /** |
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128 Check wether the given host is on the list of direct address. |
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129 @param host Host name to check. |
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130 * @return true if the given host is specified as the direct addresses. |
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131 */ |
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132 public boolean isDirect(String host){ |
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133 return directHosts.contains(host); |
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134 } |
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135 /** |
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136 Check wether the given host is on the list of direct addresses. |
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137 @param host Host address to check. |
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138 * @return true if the given host is specified as the direct address. |
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139 */ |
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140 public boolean isDirect(InetAddress host){ |
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141 return directHosts.contains(host); |
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142 } |
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143 /** |
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144 Set the proxy which should be used to connect to given proxy. |
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145 @param chainProxy CProxy to use to connect to this proxy. |
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146 */ |
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147 public void setChainProxy(CProxy chainProxy){ |
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148 this.chainProxy = chainProxy; |
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149 } |
354
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150 |
349
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151 /** |
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152 Get proxy which is used to connect to this proxy. |
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153 @return CProxy which is used to connect to this proxy, or null |
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154 if proxy is to be contacted directly. |
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155 */ |
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156 public CProxy getChainProxy(){ |
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157 return chainProxy; |
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158 } |
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159 |
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160 /** |
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161 Get string representation of this proxy. |
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162 * @returns string in the form:proxyHost:proxyPort \t Version versionNumber |
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163 */ |
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164 public String toString(){ |
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165 return (""+proxyIP.getHostName()+":"+proxyPort+"\tVersion "+version); |
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166 } |
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167 |
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168 |
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169 //Public Static(Class) Methods |
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170 //============================== |
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171 |
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172 /** |
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173 * Sets SOCKS4 proxy as default. |
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174 @param hostName Host name on which SOCKS4 server is running. |
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175 @param port Port on which SOCKS4 server is running. |
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176 @param user Username to use for communications with proxy. |
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177 */ |
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178 public static void setDefaultProxy(String hostName,int port,String user) |
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179 throws UnknownHostException{ |
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180 defaultProxy = new Socks4Proxy(hostName,port,user); |
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181 } |
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182 |
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183 /** |
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184 * Sets SOCKS4 proxy as default. |
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185 @param ipAddress Host address on which SOCKS4 server is running. |
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186 @param port Port on which SOCKS4 server is running. |
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187 @param user Username to use for communications with proxy. |
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188 */ |
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189 public static void setDefaultProxy(InetAddress ipAddress,int port, |
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190 String user){ |
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191 defaultProxy = new Socks4Proxy(ipAddress,port,user); |
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192 } |
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193 /** |
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194 * Sets SOCKS5 proxy as default. |
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195 * Default proxy only supports no-authentication. |
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196 @param hostName Host name on which SOCKS5 server is running. |
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197 @param port Port on which SOCKS5 server is running. |
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198 */ |
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199 public static void setDefaultProxy(String hostName,int port) |
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200 throws UnknownHostException{ |
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201 defaultProxy = new Socks5Proxy(hostName,port); |
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202 } |
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203 /** |
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204 * Sets SOCKS5 proxy as default. |
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205 * Default proxy only supports no-authentication. |
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206 @param ipAddress Host address on which SOCKS5 server is running. |
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207 @param port Port on which SOCKS5 server is running. |
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208 */ |
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209 public static void setDefaultProxy(InetAddress ipAddress,int port){ |
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210 defaultProxy = new Socks5Proxy(ipAddress,port); |
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211 } |
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212 /** |
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213 * Sets default proxy. |
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214 @param p CProxy to use as default proxy. |
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215 */ |
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216 public static void setDefaultProxy(CProxy p){ |
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217 defaultProxy = p; |
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218 } |
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219 |
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220 /** |
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221 Get current default proxy. |
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222 * @return Current default proxy, or null if none is set. |
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223 */ |
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224 public static CProxy getDefaultProxy(){ |
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225 return defaultProxy; |
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226 } |
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227 |
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228 /** |
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229 Parses strings in the form: host[:port:user:password], and creates |
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230 proxy from information obtained from parsing. |
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231 <p> |
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232 Defaults: port = 1080.<br> |
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233 If user specified but not password, creates Socks4Proxy, if user |
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234 not specified creates Socks5Proxy, if both user and password are |
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235 speciefied creates Socks5Proxy with user/password authentication. |
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236 @param proxy_entry String in the form host[:port:user:password] |
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237 @return CProxy created from the string, null if entry was somehow |
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238 invalid(host unknown for example, or empty string) |
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239 */ |
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240 public static CProxy parseProxy(String proxy_entry){ |
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241 |
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242 String proxy_host; |
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243 int proxy_port = 1080; |
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244 String proxy_user = null; |
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245 String proxy_password = null; |
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246 CProxy proxy; |
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247 |
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248 java.util.StringTokenizer st = new java.util.StringTokenizer( |
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249 proxy_entry,":"); |
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250 if(st.countTokens() < 1) return null; |
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251 |
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252 proxy_host = st.nextToken(); |
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253 if(st.hasMoreTokens()) |
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254 try{ |
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255 proxy_port = Integer.parseInt(st.nextToken().trim()); |
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256 }catch(NumberFormatException nfe){} |
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257 |
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258 if(st.hasMoreTokens()) |
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259 proxy_user = st.nextToken(); |
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260 |
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261 if(st.hasMoreTokens()) |
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262 proxy_password = st.nextToken(); |
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263 |
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264 try{ |
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265 if(proxy_user == null) |
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266 proxy = new Socks5Proxy(proxy_host,proxy_port); |
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267 else if(proxy_password == null) |
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268 proxy = new Socks4Proxy(proxy_host,proxy_port,proxy_user); |
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269 else{ |
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270 proxy = new Socks5Proxy(proxy_host,proxy_port); |
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271 UserPasswordAuthentication upa = new UserPasswordAuthentication( |
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272 proxy_user, proxy_password); |
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273 |
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274 ((Socks5Proxy)proxy).setAuthenticationMethod(upa.METHOD_ID,upa); |
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275 } |
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276 }catch(UnknownHostException uhe){ |
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277 return null; |
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278 } |
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279 |
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280 return proxy; |
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281 } |
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282 |
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283 |
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284 //Protected Methods |
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285 //================= |
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286 |
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287 protected void startSession()throws SocksException{ |
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288 try{ |
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289 if(chainProxy == null) |
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290 proxySocket = new Socket(proxyIP,proxyPort); |
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291 else if(proxyIP != null) |
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292 proxySocket = new SocksSocket(chainProxy,proxyIP,proxyPort); |
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293 else |
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294 proxySocket = new SocksSocket(chainProxy,proxyHost,proxyPort); |
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295 |
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296 in = proxySocket.getInputStream(); |
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297 out = proxySocket.getOutputStream(); |
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298 }catch(SocksException se){ |
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299 throw se; |
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300 }catch(IOException io_ex){ |
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301 throw new SocksException(SOCKS_PROXY_IO_ERROR,""+io_ex); |
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302 } |
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303 } |
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304 |
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305 protected abstract CProxy copy(); |
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306 protected abstract ProxyMessage formMessage(int cmd,InetAddress ip,int port); |
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307 protected abstract ProxyMessage formMessage(int cmd,String host,int port) |
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308 throws UnknownHostException; |
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309 protected abstract ProxyMessage formMessage(InputStream in) |
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310 throws SocksException, |
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311 IOException; |
354
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312 |
349
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313 |
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314 protected ProxyMessage connect(InetAddress ip,int port) |
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315 throws SocksException{ |
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316 try{ |
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317 startSession(); |
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318 ProxyMessage request = formMessage(SOCKS_CMD_CONNECT, |
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319 ip,port); |
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320 return exchange(request); |
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321 }catch(SocksException se){ |
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322 endSession(); |
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323 throw se; |
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324 } |
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325 } |
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326 protected ProxyMessage connect(String host,int port) |
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327 throws UnknownHostException,SocksException{ |
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328 try{ |
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329 startSession(); |
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330 ProxyMessage request = formMessage(SOCKS_CMD_CONNECT, |
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331 host,port); |
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332 return exchange(request); |
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333 }catch(SocksException se){ |
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334 endSession(); |
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335 throw se; |
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336 } |
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337 } |
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338 |
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339 protected ProxyMessage bind(InetAddress ip,int port) |
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340 throws SocksException{ |
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341 try{ |
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342 startSession(); |
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343 ProxyMessage request = formMessage(SOCKS_CMD_BIND, |
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344 ip,port); |
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345 return exchange(request); |
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346 }catch(SocksException se){ |
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347 endSession(); |
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348 throw se; |
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349 } |
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350 } |
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351 protected ProxyMessage bind(String host,int port) |
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352 throws UnknownHostException,SocksException{ |
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353 try{ |
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354 startSession(); |
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355 ProxyMessage request = formMessage(SOCKS_CMD_BIND, |
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356 host,port); |
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357 return exchange(request); |
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358 }catch(SocksException se){ |
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359 endSession(); |
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360 throw se; |
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361 } |
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362 } |
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363 |
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364 protected ProxyMessage accept() |
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365 throws IOException,SocksException{ |
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366 ProxyMessage msg; |
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367 try{ |
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368 msg = formMessage(in); |
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369 }catch(InterruptedIOException iioe){ |
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370 throw iioe; |
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371 }catch(IOException io_ex){ |
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372 endSession(); |
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373 throw new SocksException(SOCKS_PROXY_IO_ERROR,"While Trying accept:" |
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374 +io_ex); |
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375 } |
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376 return msg; |
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377 } |
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378 |
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379 protected ProxyMessage udpAssociate(InetAddress ip,int port) |
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380 throws SocksException{ |
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381 try{ |
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382 startSession(); |
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383 ProxyMessage request = formMessage(SOCKS_CMD_UDP_ASSOCIATE, |
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384 ip,port); |
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385 if(request != null) |
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386 return exchange(request); |
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387 }catch(SocksException se){ |
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388 endSession(); |
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389 throw se; |
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390 } |
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391 //Only get here if request was null |
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392 endSession(); |
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393 throw new SocksException(SOCKS_METHOD_NOTSUPPORTED, |
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394 "This version of proxy does not support UDP associate, use version 5"); |
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395 } |
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396 protected ProxyMessage udpAssociate(String host,int port) |
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397 throws UnknownHostException,SocksException{ |
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398 try{ |
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399 startSession(); |
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400 ProxyMessage request = formMessage(SOCKS_CMD_UDP_ASSOCIATE, |
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401 host,port); |
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402 if(request != null) return exchange(request); |
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403 }catch(SocksException se){ |
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404 endSession(); |
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405 throw se; |
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|
406 } |
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407 //Only get here if request was null |
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408 endSession(); |
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409 throw new SocksException(SOCKS_METHOD_NOTSUPPORTED, |
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410 "This version of proxy does not support UDP associate, use version 5"); |
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411 } |
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412 |
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413 |
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414 protected void endSession(){ |
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415 try{ |
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416 if(proxySocket!=null) proxySocket.close(); |
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417 proxySocket = null; |
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418 }catch(IOException io_ex){ |
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419 } |
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420 } |
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421 |
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422 /** |
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423 *Sends the request to SOCKS server |
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424 */ |
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425 protected void sendMsg(ProxyMessage msg)throws SocksException, |
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426 IOException{ |
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427 msg.write(out); |
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428 } |
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429 |
354
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430 /** |
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431 * Reads the reply from the SOCKS server |
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432 */ |
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433 protected ProxyMessage readMsg()throws SocksException, |
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434 IOException{ |
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435 return formMessage(in); |
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436 } |
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437 /** |
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438 *Sends the request reads reply and returns it |
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439 *throws exception if something wrong with IO |
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440 *or the reply code is not zero |
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441 */ |
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442 protected ProxyMessage exchange(ProxyMessage request) |
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443 throws SocksException{ |
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444 ProxyMessage reply; |
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445 try{ |
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446 request.write(out); |
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447 reply = formMessage(in); |
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448 }catch(SocksException s_ex){ |
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449 throw s_ex; |
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450 }catch(IOException ioe){ |
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451 throw(new SocksException(SOCKS_PROXY_IO_ERROR,""+ioe)); |
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452 } |
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453 return reply; |
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454 } |
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455 |
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456 |
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457 //Private methods |
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458 //=============== |
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459 |
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460 |
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461 //Constants |
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462 |
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463 public static final int SOCKS_SUCCESS =0; |
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464 public static final int SOCKS_FAILURE =1; |
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465 public static final int SOCKS_BADCONNECT =2; |
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466 public static final int SOCKS_BADNETWORK =3; |
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467 public static final int SOCKS_HOST_UNREACHABLE =4; |
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468 public static final int SOCKS_CONNECTION_REFUSED =5; |
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469 public static final int SOCKS_TTL_EXPIRE =6; |
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470 public static final int SOCKS_CMD_NOT_SUPPORTED =7; |
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471 public static final int SOCKS_ADDR_NOT_SUPPORTED =8; |
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472 |
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473 public static final int SOCKS_NO_PROXY =1<<16; |
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474 public static final int SOCKS_PROXY_NO_CONNECT =2<<16; |
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475 public static final int SOCKS_PROXY_IO_ERROR =3<<16; |
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476 public static final int SOCKS_AUTH_NOT_SUPPORTED =4<<16; |
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477 public static final int SOCKS_AUTH_FAILURE =5<<16; |
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478 public static final int SOCKS_JUST_ERROR =6<<16; |
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479 |
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480 public static final int SOCKS_DIRECT_FAILED =7<<16; |
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481 public static final int SOCKS_METHOD_NOTSUPPORTED =8<<16; |
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482 |
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483 |
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484 public static final int SOCKS_CMD_CONNECT =0x1; |
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485 static final int SOCKS_CMD_BIND =0x2; |
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486 static final int SOCKS_CMD_UDP_ASSOCIATE =0x3; |
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487 |
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488 } |