Mercurial > 510Connectbot
annotate app/src/main/java/ch/ethz/ssh2/channel/DynamicAcceptThread.java @ 461:8ac203bbd3c2
Added tag stable-1.9.3-4 for changeset 4776062555f3
author | Carl Byington <carl@five-ten-sg.com> |
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date | Sun, 28 Apr 2019 17:10:22 -0700 |
parents | d29cce60f393 |
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1 /* |
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2 * ConnectBot: simple, powerful, open-source SSH client for Android |
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3 * Copyright 2007 Kenny Root, Jeffrey Sharkey |
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4 * |
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5 * Licensed under the Apache License, Version 2.0 (the "License"); |
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6 * you may not use this file except in compliance with the License. |
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7 * You may obtain a copy of the License at |
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8 * |
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9 * http://www.apache.org/licenses/LICENSE-2.0 |
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10 * |
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11 * Unless required by applicable law or agreed to in writing, software |
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12 * distributed under the License is distributed on an "AS IS" BASIS, |
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13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 * See the License for the specific language governing permissions and |
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15 * limitations under the License. |
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16 */ |
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17 |
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18 package ch.ethz.ssh2.channel; |
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19 |
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20 import java.io.IOException; |
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21 import java.io.InputStream; |
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22 import java.io.InterruptedIOException; |
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23 import java.io.OutputStream; |
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24 import java.io.PushbackInputStream; |
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25 import java.net.ConnectException; |
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26 import java.net.InetAddress; |
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27 import java.net.InetSocketAddress; |
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28 import java.net.NoRouteToHostException; |
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29 import java.net.ServerSocket; |
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30 import java.net.Socket; |
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31 |
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32 import net.sourceforge.jsocks.CProxy; |
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33 import net.sourceforge.jsocks.ProxyMessage; |
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34 import net.sourceforge.jsocks.Socks4Message; |
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35 import net.sourceforge.jsocks.Socks5Message; |
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36 import net.sourceforge.jsocks.SocksException; |
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37 import net.sourceforge.jsocks.server.ServerAuthenticator; |
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38 import net.sourceforge.jsocks.server.ServerAuthenticatorNone; |
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39 |
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40 /** |
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41 * DynamicAcceptThread. |
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42 * |
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43 * @author Kenny Root |
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44 * @version $Id$ |
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45 */ |
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46 public class DynamicAcceptThread extends Thread implements IChannelWorkerThread { |
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47 private ChannelManager cm; |
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48 private ServerSocket ss; |
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49 |
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50 class DynamicAcceptRunnable implements Runnable { |
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51 private static final int idleTimeout = 180000; //3 minutes |
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52 |
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53 private ServerAuthenticator auth; |
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54 private Socket sock; |
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55 private InputStream in; |
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56 private OutputStream out; |
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57 private ProxyMessage msg; |
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58 |
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59 public DynamicAcceptRunnable(ServerAuthenticator auth, Socket sock) { |
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60 this.auth = auth; |
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61 this.sock = sock; |
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62 setName("DynamicAcceptRunnable"); |
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63 } |
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64 |
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65 public void run() { |
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66 try { |
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67 startSession(); |
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68 } |
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69 catch (IOException ioe) { |
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70 int error_code = CProxy.SOCKS_FAILURE; |
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71 |
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72 if (ioe instanceof SocksException) |
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73 error_code = ((SocksException) ioe).errCode; |
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74 else if (ioe instanceof NoRouteToHostException) |
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75 error_code = CProxy.SOCKS_HOST_UNREACHABLE; |
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76 else if (ioe instanceof ConnectException) |
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77 error_code = CProxy.SOCKS_CONNECTION_REFUSED; |
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78 else if (ioe instanceof InterruptedIOException) |
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79 error_code = CProxy.SOCKS_TTL_EXPIRE; |
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80 |
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81 if (error_code > CProxy.SOCKS_ADDR_NOT_SUPPORTED |
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82 || error_code < 0) { |
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83 error_code = CProxy.SOCKS_FAILURE; |
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84 } |
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85 |
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86 sendErrorMessage(error_code); |
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87 } |
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88 finally { |
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89 if (auth != null) |
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90 auth.endSession(); |
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91 } |
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92 } |
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93 |
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94 private ProxyMessage readMsg(InputStream in) throws IOException { |
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95 PushbackInputStream push_in; |
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96 |
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97 if (in instanceof PushbackInputStream) |
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98 push_in = (PushbackInputStream) in; |
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99 else |
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100 push_in = new PushbackInputStream(in); |
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101 |
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102 int version = push_in.read(); |
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103 push_in.unread(version); |
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104 ProxyMessage msg; |
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105 |
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106 if (version == 5) { |
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107 msg = new Socks5Message(push_in, false); |
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108 } |
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109 else if (version == 4) { |
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110 msg = new Socks4Message(push_in, false); |
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111 } |
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112 else { |
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113 throw new SocksException(CProxy.SOCKS_FAILURE); |
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114 } |
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115 |
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116 return msg; |
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117 } |
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118 |
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119 private void sendErrorMessage(int error_code) { |
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120 ProxyMessage err_msg; |
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121 |
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122 if (msg instanceof Socks4Message) |
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123 err_msg = new Socks4Message(Socks4Message.REPLY_REJECTED); |
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124 else |
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125 err_msg = new Socks5Message(error_code); |
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126 |
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127 try { |
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128 err_msg.write(out); |
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129 } |
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130 catch (IOException ioe) { |
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131 } |
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132 } |
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133 |
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134 private void handleRequest(ProxyMessage msg) throws IOException { |
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135 if (!auth.checkRequest(msg)) |
353
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136 throw new SocksException(CProxy.SOCKS_FAILURE); |
294
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137 |
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138 switch (msg.command) { |
353
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351
diff
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139 case CProxy.SOCKS_CMD_CONNECT: |
294
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140 onConnect(msg); |
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141 break; |
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142 |
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143 default: |
353
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144 throw new SocksException(CProxy.SOCKS_CMD_NOT_SUPPORTED); |
294
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145 } |
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146 } |
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147 |
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148 private void startSession() throws IOException { |
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149 sock.setSoTimeout(idleTimeout); |
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150 |
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151 try { |
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152 auth = auth.startSession(sock); |
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153 } |
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154 catch (IOException ioe) { |
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155 System.out.println("Could not start SOCKS session"); |
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156 ioe.printStackTrace(); |
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157 auth = null; |
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158 return; |
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159 } |
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160 |
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161 if (auth == null) { // Authentication failed |
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162 System.out.println("SOCKS auth failed"); |
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163 return; |
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|
164 } |
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165 |
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166 in = auth.getInputStream(); |
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167 out = auth.getOutputStream(); |
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168 msg = readMsg(in); |
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|
169 handleRequest(msg); |
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|
170 } |
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171 |
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172 private void onConnect(ProxyMessage msg) throws IOException { |
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173 ProxyMessage response = null; |
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174 Channel cn = null; |
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175 StreamForwarder r2l = null; |
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176 StreamForwarder l2r = null; |
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177 |
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178 if (msg instanceof Socks5Message) { |
353
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351
diff
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179 response = new Socks5Message(CProxy.SOCKS_SUCCESS, (InetAddress)null, 0); |
294
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180 } |
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181 else { |
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182 response = new Socks4Message(Socks4Message.REPLY_OK, (InetAddress)null, 0); |
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183 } |
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184 |
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185 response.write(out); |
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186 String destHost = msg.host; |
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187 |
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188 if (msg.ip != null) |
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189 destHost = msg.ip.getHostAddress(); |
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190 |
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191 try { |
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192 /* |
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193 * This may fail, e.g., if the remote port is closed (in |
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194 * optimistic terms: not open yet) |
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195 */ |
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196 cn = cm.openDirectTCPIPChannel(destHost, msg.port, |
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197 "127.0.0.1", 0); |
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|
198 } |
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|
199 catch (IOException e) { |
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parents:
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changeset
|
200 /* |
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201 * Simply close the local socket and wait for the next incoming |
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changeset
|
202 * connection |
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|
203 */ |
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parents:
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changeset
|
204 try { |
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parents:
diff
changeset
|
205 sock.close(); |
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parents:
diff
changeset
|
206 } |
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parents:
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changeset
|
207 catch (IOException ignore) { |
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parents:
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changeset
|
208 } |
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parents:
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changeset
|
209 |
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parents:
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changeset
|
210 return; |
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parents:
diff
changeset
|
211 } |
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parents:
diff
changeset
|
212 |
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parents:
diff
changeset
|
213 try { |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
214 r2l = new StreamForwarder(cn, null, sock, cn.stdoutStream, out, "RemoteToLocal"); |
c41a399da303
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parents:
diff
changeset
|
215 l2r = new StreamForwarder(cn, r2l, sock, in, cn.stdinStream, "LocalToRemote"); |
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parents:
diff
changeset
|
216 } |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
217 catch (IOException e) { |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
218 try { |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
219 /* |
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parents:
diff
changeset
|
220 * This message is only visible during debugging, since we |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
221 * discard the channel immediatelly |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
222 */ |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
223 cn.cm.closeChannel(cn, |
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parents:
diff
changeset
|
224 "Weird error during creation of StreamForwarder (" |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
225 + e.getMessage() + ")", true); |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
226 } |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
227 catch (IOException ignore) { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
228 } |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
229 |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
230 return; |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
231 } |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
232 |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
233 r2l.setDaemon(true); |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
234 l2r.setDaemon(true); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
235 r2l.start(); |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
236 l2r.start(); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
237 } |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
238 } |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
239 |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
240 public DynamicAcceptThread(ChannelManager cm, int local_port) |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
241 throws IOException { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
242 this.cm = cm; |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
243 setName("DynamicAcceptThread"); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
244 ss = new ServerSocket(local_port); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
245 } |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
246 |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
247 public DynamicAcceptThread(ChannelManager cm, InetSocketAddress localAddress) |
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parents:
diff
changeset
|
248 throws IOException { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
249 this.cm = cm; |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
250 ss = new ServerSocket(); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
251 ss.bind(localAddress); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
252 } |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
253 |
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
254 @Override |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
255 public void run() { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
256 try { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
257 cm.registerThread(this); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
258 } |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
259 catch (IOException e) { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
260 stopWorking(); |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
261 return; |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
262 } |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
263 |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
264 while (true) { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
265 Socket sock = null; |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
266 |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
|
267 try { |
c41a399da303
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Carl Byington <carl@five-ten-sg.com>
parents:
diff
changeset
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268 sock = ss.accept(); |
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269 } |
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270 catch (IOException e) { |
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271 stopWorking(); |
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272 return; |
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273 } |
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274 |
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275 DynamicAcceptRunnable dar = new DynamicAcceptRunnable(new ServerAuthenticatorNone(), sock); |
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276 Thread t = new Thread(dar); |
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277 t.setDaemon(true); |
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278 t.start(); |
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279 } |
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280 } |
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281 |
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282 /* |
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283 * (non-Javadoc) |
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284 * |
328
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285 * @see ch.ethz.ssh2.channel.IChannelWorkerThread#stopWorking() |
294
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286 */ |
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287 public void stopWorking() { |
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288 try { |
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289 /* This will lead to an IOException in the ss.accept() call */ |
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290 ss.close(); |
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291 } |
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292 catch (IOException e) { |
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293 } |
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294 } |
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295 } |