Mercurial > hg > Applications > TreeVNC
annotate src/main/java/jp/ac/u_ryukyu/treevnc/MyRfbProto.java @ 110:464eb64e3fd6
minor fix.
| author | oc |
|---|---|
| date | Fri, 23 May 2014 19:58:35 +0900 |
| parents | 457f9dfbf7ce |
| children | a7988d3c0266 |
| rev | line source |
|---|---|
| 32 | 1 package jp.ac.u_ryukyu.treevnc; |
| 28 | 2 |
| 3 import java.io.IOException; | |
| 4 import java.net.Socket; | |
| 5 import java.nio.ByteBuffer; | |
| 109 | 6 import java.nio.ByteOrder; |
| 28 | 7 import java.util.LinkedList; |
| 8 import java.util.concurrent.atomic.AtomicInteger; | |
| 9 | |
| 35 | 10 import jp.ac.u_ryukyu.treevnc.client.EchoClient; |
| 28 | 11 import jp.ac.u_ryukyu.treevnc.server.RequestScreenThread; |
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12 import jp.ac.u_ryukyu.treevnc.server.VncProxyService; |
| 28 | 13 |
| 14 import com.glavsoft.exceptions.TransportException; | |
| 107 | 15 import com.glavsoft.rfb.client.ClientToServerMessage; |
| 96 | 16 import com.glavsoft.rfb.encoding.EncodingType; |
| 28 | 17 import com.glavsoft.rfb.protocol.Protocol; |
| 18 import com.glavsoft.rfb.protocol.ProtocolContext; | |
| 19 import com.glavsoft.transport.Reader; | |
| 20 import com.glavsoft.transport.Writer; | |
| 65 | 21 import com.glavsoft.viewer.ViewerImpl; |
| 28 | 22 |
| 23 public class MyRfbProto { | |
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24 final static int FramebufferUpdateRequest = 3; |
| 28 | 25 final static int CheckDelay = 11; |
| 103 | 26 protected final static int FramebufferUpdate = 0; |
| 28 | 27 private ProtocolContext context; |
| 103 | 28 protected final static String versionMsg_3_856 = "RFB 003.856\n"; |
| 28 | 29 private int clients; |
| 98 | 30 public MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new MulticastQueue<LinkedList<ByteBuffer>>(); |
| 28 | 31 private RequestScreenThread rThread; |
| 32 private boolean proxyFlag = true; | |
| 35 | 33 private EchoClient echo; |
| 45 | 34 private String proxyAddr; |
| 60 | 35 public int acceptPort; |
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36 protected boolean readyReconnect = false; |
| 98 | 37 private boolean cuiVersion; |
| 107 | 38 private long counter = 0; // packet serial number |
| 39 private VncProxyService viewer = null; | |
| 40 | |
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41 |
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42 public MyRfbProto() { |
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43 rThread = new RequestScreenThread(this); |
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44 } |
| 107 | 45 |
| 46 public void setViewer(VncProxyService viewer) { | |
| 47 this.viewer = viewer; | |
| 48 } | |
| 28 | 49 |
| 103 | 50 public boolean isRoot() { |
| 51 return false; | |
| 52 } | |
| 28 | 53 |
| 54 public void newClient(AcceptThread acceptThread, final Socket newCli, | |
| 55 final Writer os, final Reader is) throws IOException { | |
| 56 // createBimgFlag = true; | |
| 57 // rfb.addSockTmp(newCli); | |
| 58 // addSock(newCli); | |
| 59 final int myId = clients; | |
| 60 final MulticastQueue.Client<LinkedList<ByteBuffer>> c = multicastqueue.newClient(); | |
| 61 final AtomicInteger writerRunning = new AtomicInteger(); | |
| 62 writerRunning.set(1); | |
| 63 /** | |
| 64 * Timeout thread. If a client is suspended, it has top of queue | |
| 65 * indefinitely, which caused memory overflow. After the timeout, we | |
| 66 * poll the queue and discard it. Start long wait if writer is running. | |
| 67 */ | |
| 68 final Runnable timer = new Runnable() { | |
| 69 public void run() { | |
| 70 int count = 0; | |
| 71 for (;;) { | |
| 72 long timeout = 50000 / 8; | |
| 73 try { | |
| 74 synchronized (this) { | |
| 75 int state, flag; | |
| 76 writerRunning.set(0); | |
| 77 wait(timeout); | |
| 78 flag = 0; | |
| 79 while ((state = writerRunning.get()) == 0) { | |
| 80 c.poll(); // discard, should be timeout | |
| 81 count++; | |
| 82 if (flag == 0) { | |
| 83 System.out.println("Discarding " + myId | |
| 84 + " count=" + count); | |
| 85 flag = 1; | |
| 86 } | |
| 87 wait(10); // if this is too short, writer cannot | |
| 88 // take the poll, if this is too | |
| 89 // long, memory will overflow... | |
| 90 } | |
| 91 if (flag == 1) | |
| 92 System.out.println("Resuming " + myId | |
| 93 + " count=" + count); | |
| 94 if (state != 1) { | |
| 95 System.out.println("Client died " + myId); | |
| 96 break; | |
| 97 } | |
| 98 } | |
| 99 } catch (InterruptedException e) { | |
| 100 } | |
| 101 } | |
| 102 } | |
| 103 }; | |
| 88 | 104 new Thread(timer, "timer-discard-multicastqueue").start(); |
| 28 | 105 /** |
| 107 | 106 * send all incoming from clients to parent. |
| 28 | 107 */ |
| 108 final Runnable reader = new Runnable() { | |
| 107 | 109 |
| 110 | |
| 28 | 111 public void run() { |
| 112 byte b[] = new byte[4096]; | |
| 113 for (;;) { | |
| 114 try { | |
| 115 int c = is.readByte(b); | |
| 116 if (c <= 0) | |
| 117 throw new IOException(); | |
| 107 | 118 if (isRoot()) { |
| 119 if (b[0] == ClientToServerMessage.SERVER_CHANGE_REQUEST) { | |
| 120 if (permitChangeScreen()) { | |
| 109 | 121 ByteBuffer buf = ByteBuffer.wrap(b); |
| 122 buf.order(ByteOrder.BIG_ENDIAN); | |
| 123 int length = buf.getInt(4); | |
| 107 | 124 if (length == 0) |
| 125 continue; | |
| 126 String newHostName = new String(b, 8, length); | |
| 127 // please remove these numbers. | |
| 128 if (viewer != null) { | |
| 129 viewer.changeVNCServer(newHostName, 3200, 1980); | |
| 130 } | |
| 131 } else { | |
| 132 continue; | |
| 133 } | |
| 134 } | |
| 110 | 135 } else if (b[0] == ClientToServerMessage.SERVER_CHANGE_REQUEST) { |
| 107 | 136 context.getWriter().write(b); |
| 137 } | |
| 28 | 138 // System.out.println("client read "+c); |
| 89 | 139 } catch (Exception e) { |
| 28 | 140 try { |
| 141 writerRunning.set(2); | |
| 142 os.close(); | |
| 143 is.close(); | |
| 36 | 144 break; |
| 28 | 145 } catch (IOException e1) { |
| 146 } catch (TransportException e1) { | |
| 147 e1.printStackTrace(); | |
| 148 } | |
| 149 return; | |
| 150 } | |
| 151 } | |
| 152 } | |
| 107 | 153 |
| 154 private boolean permitChangeScreen() { | |
| 109 | 155 return true; |
| 107 | 156 } |
| 28 | 157 }; |
| 158 /** | |
| 159 * send packets to a client | |
| 160 */ | |
| 161 Runnable sender = new Runnable() { | |
| 162 public void run() { | |
| 163 writerRunning.set(1); | |
| 164 try { | |
| 165 requestThreadNotify(); | |
| 166 | |
| 167 /** | |
| 168 * initial connection of RFB protocol | |
| 169 */ | |
| 170 sendRfbVersion(os); | |
| 171 // readVersionMsg(is); | |
| 172 readVersionMsg(is, os); | |
| 173 sendSecurityType(os); | |
| 174 readSecType(is); | |
| 175 sendSecResult(os); | |
| 176 readClientInit(is); | |
| 177 sendInitData(os); | |
| 88 | 178 // after this, we discard upward packet. |
| 179 new Thread(reader, "discard-upward-comm").start(); | |
| 28 | 180 // writeFramebufferUpdateRequest(0,0, framebufferWidth, |
| 181 // framebufferHeight, false ); | |
| 182 for (;;) { | |
| 183 LinkedList<ByteBuffer> bufs = c.poll(); | |
| 184 int inputIndex = 0; | |
| 185 ByteBuffer header = bufs.get(inputIndex); | |
| 186 if (header == null) | |
| 187 continue; | |
| 188 else if (header.get(0) == CheckDelay) { | |
| 189 writeToClient(os, bufs, inputIndex); | |
| 190 continue; | |
| 191 } else if (header.get(0) == FramebufferUpdate) { | |
| 63 | 192 //System.out.println("client "+ myId); |
| 28 | 193 } |
| 194 /* | |
| 195 * if(i%20==0){ sendDataCheckDelay(); } i++; | |
| 196 */ | |
| 197 writeToClient(os, bufs, inputIndex); | |
| 198 writerRunning.set(1); // yes my client is awaking. | |
| 199 } | |
| 89 | 200 } catch (Exception e) { |
| 28 | 201 try { |
| 202 writerRunning.set(2); | |
| 203 os.close(); | |
| 204 } catch (IOException e1) { | |
| 205 } | |
| 206 /* if socket closed cliList.remove(newCli); */ | |
| 207 } | |
| 208 } | |
| 209 | |
| 210 public void writeToClient(final Writer os, | |
| 211 LinkedList<ByteBuffer> bufs, int inputIndex) | |
| 212 throws TransportException { | |
| 213 while (inputIndex < bufs.size()) { | |
| 214 ByteBuffer b = bufs.get(inputIndex++); | |
| 215 os.write(b.array(), b.position(), b.limit()); | |
| 216 } | |
| 217 os.flush(); | |
| 74 | 218 bufs = null; |
| 219 multicastqueue.heapAvailable(); | |
| 28 | 220 } |
| 221 }; | |
| 222 clients++; | |
| 88 | 223 new Thread(sender, "writer-to-lower-node").start(); |
| 28 | 224 |
| 225 } | |
| 226 | |
| 88 | 227 public void requestThreadNotify() { |
| 28 | 228 rThread.reStart(); |
| 229 } | |
| 230 | |
| 231 private void sendRfbVersion(Writer writer) throws IOException, TransportException { | |
| 232 // os.write(versionMsg_3_8.getBytes()); | |
| 54 | 233 writer.write(versionMsg_3_856.getBytes()); |
| 28 | 234 } |
| 235 | |
| 236 private int readVersionMsg(Reader reader, Writer writer) throws IOException, TransportException { | |
| 237 | |
| 238 byte[] b = new byte[12]; | |
| 239 | |
| 240 reader.readBytes(b); | |
| 241 | |
| 242 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ') | |
| 243 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9') | |
| 244 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.') | |
| 245 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9') | |
| 246 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) { | |
| 247 throw new IOException("this is not an RFB server"); | |
| 248 } | |
| 249 | |
| 250 int rfbMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0'); | |
| 251 int rfbMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0'); | |
| 252 | |
| 253 if (rfbMajor < 3) { | |
| 254 throw new IOException( | |
| 255 "RFB server does not support protocol version 3"); | |
| 256 } | |
| 257 | |
| 258 if (rfbMinor == 855) { | |
| 259 sendProxyFlag(writer); | |
| 260 if (proxyFlag) | |
| 261 sendPortNumber(writer); | |
| 262 } | |
| 263 return rfbMinor; | |
| 264 } | |
| 45 | 265 |
| 107 | 266 public void screenChangeRequest() throws TransportException { |
| 267 new ScreenChangeRequest(echo.getMyAddress().getBytes()).send(context.getWriter()); | |
| 45 | 268 } |
| 28 | 269 |
| 270 private void sendProxyFlag(Writer writer) throws TransportException { | |
| 271 if (proxyFlag) | |
| 272 writer.writeInt(1); | |
| 273 else | |
| 274 writer.writeInt(0); | |
| 275 } | |
| 276 | |
| 277 private void sendPortNumber(Writer writer) throws TransportException { | |
| 278 byte[] b = new byte[4]; | |
| 279 //b = castIntByte(getHost.getPort()); | |
| 280 b = castIntByte(9999); | |
| 281 writer.write(b); | |
| 282 } | |
| 283 | |
| 284 private byte[] castIntByte(int len) { | |
| 285 byte[] b = new byte[4]; | |
| 286 b[0] = (byte) ((len >>> 24) & 0xFF); | |
| 287 b[1] = (byte) ((len >>> 16) & 0xFF); | |
| 288 b[2] = (byte) ((len >>> 8) & 0xFF); | |
| 289 b[3] = (byte) ((len >>> 0) & 0xFF); | |
| 290 return b; | |
| 291 } | |
| 292 | |
| 45 | 293 |
| 28 | 294 private void readSecType(Reader reader) throws TransportException { |
| 295 byte[] b = new byte[1]; | |
| 296 reader.read(b); | |
| 297 } | |
| 298 | |
| 299 private void sendSecurityType(Writer os) throws TransportException { | |
| 300 // number-of-security-types | |
| 301 os.writeInt(1); | |
| 302 // security-types | |
| 303 // 1:None | |
| 304 os.writeInt(1); | |
| 305 | |
| 306 /* | |
| 307 * os.write(4); os.write(30); os.write(31); os.write(32); os.write(35); | |
| 308 * os.flush(); | |
| 309 */ | |
| 310 } | |
| 311 | |
| 312 private void sendSecResult(Writer os) throws TransportException { | |
| 313 byte[] b = castIntByte(0); | |
| 314 os.write(b); | |
| 315 } | |
| 316 | |
| 317 private void readClientInit(Reader in) throws TransportException { | |
| 318 byte[] b = new byte[0]; | |
| 319 in.readBytes(b); | |
| 320 } | |
| 321 | |
| 85 | 322 byte initData[] = {7, -128, 4, 56, 32, 24, 0, 1, 0, -1, 0, -1, 0, -1, 16, 8, 0, 0, 0, 0, 0, 0, 0, 7, 102, 105, 114, 101, 102, 108, 121}; |
| 28 | 323 private void sendInitData(Writer os) throws TransportException { |
| 85 | 324 // In case of "-d" we have no context |
| 325 if (context != null){ | |
| 326 os.write(context.getInitData()); | |
| 327 } else { | |
| 328 // Send dummy data | |
| 329 os.write(initData); | |
| 330 } | |
| 28 | 331 } |
| 332 | |
| 333 public void setProtocolContext(Protocol workingProtocol) { | |
| 334 context = workingProtocol; | |
| 335 } | |
| 29 | 336 |
| 337 | |
| 338 public void readSendData(int dataLen, Reader reader) throws TransportException { | |
| 339 | |
| 340 } | |
| 31 | 341 |
| 342 public Socket accept() throws IOException { | |
| 343 return null; | |
| 344 } | |
| 345 | |
| 38 | 346 public int selectPort(int port) { |
| 347 return port; | |
| 31 | 348 } |
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349 |
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350 |
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351 public void writeFramebufferUpdateRequest(int x, int y, int w, int h, |
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352 boolean incremental) throws TransportException { |
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353 byte[] b = new byte[10]; |
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354 |
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355 b[0] = (byte) FramebufferUpdateRequest; // 3 is FrameBufferUpdateRequest |
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356 b[1] = (byte) (incremental ? 1 : 0); |
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357 b[2] = (byte) ((x >> 8) & 0xff); |
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358 b[3] = (byte) (x & 0xff); |
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359 b[4] = (byte) ((y >> 8) & 0xff); |
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360 b[5] = (byte) (y & 0xff); |
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361 b[6] = (byte) ((w >> 8) & 0xff); |
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362 b[7] = (byte) (w & 0xff); |
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363 b[8] = (byte) ((h >> 8) & 0xff); |
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364 b[9] = (byte) (h & 0xff); |
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365 |
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366 // os.write(b); |
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367 } |
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368 |
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369 public void notProxy() { |
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370 proxyFlag = false; |
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371 } |
| 35 | 372 |
| 373 public void setEcho(EchoClient _echo) { | |
| 374 echo = _echo; | |
| 375 } | |
| 376 | |
| 65 | 377 public void setViewer(ViewerImpl v) { |
| 36 | 378 echo.setViewer(v); |
| 379 } | |
| 380 | |
| 65 | 381 public ViewerImpl getViewer() { |
| 382 return echo.getViewer(); | |
| 383 } | |
| 384 | |
| 35 | 385 public EchoClient getEcho() { |
| 386 return echo; | |
| 387 } | |
| 43 | 388 |
| 389 public void setTerminationType(boolean setType) { | |
| 390 /*nop*/ | |
| 391 } | |
| 392 | |
| 393 public boolean getTerminationType() { | |
| 394 /*nop*/ | |
| 395 return true; | |
| 396 } | |
| 45 | 397 |
| 398 public void setProxyAddr(String proxyAddr) { | |
| 399 this.proxyAddr = proxyAddr; | |
| 400 } | |
| 52 | 401 |
| 402 | |
| 403 public void close() { | |
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404 // none |
| 52 | 405 } |
| 45 | 406 |
| 60 | 407 public int getAcceptPort() { |
| 408 return 0; | |
| 409 } | |
| 410 | |
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411 public boolean getReadyReconnect() { |
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412 return readyReconnect; |
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413 } |
| 65 | 414 |
| 415 | |
| 416 public boolean getCuiVersion() { | |
| 417 return cuiVersion; | |
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418 } |
| 65 | 419 |
| 420 public void setCuiVersion(boolean flag) { | |
| 421 cuiVersion = flag; | |
| 422 } | |
| 66 | 423 |
| 424 public void readCheckDelay(Reader reader) throws TransportException { | |
| 425 | |
| 426 } | |
| 427 | |
| 428 public String getProxyAddr() { | |
| 429 return proxyAddr; | |
| 430 } | |
| 65 | 431 |
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432 public synchronized void setReadyReconnect(boolean ready) { |
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433 readyReconnect = ready; |
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434 if (ready) { |
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435 notifyAll(); |
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436 } |
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437 } |
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438 |
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439 public synchronized void waitForReady(VncProxyService vncProxyService) throws InterruptedException { |
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440 while (!readyReconnect) { |
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441 wait(); |
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442 } |
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443 } |
| 96 | 444 |
| 445 | |
| 446 public void sendDesktopSizeChange() { | |
| 447 LinkedList<ByteBuffer> desktopSize = new LinkedList<ByteBuffer>(); | |
| 97 | 448 int width = context.getFbWidth(); |
| 449 int height = context.getFbHeight(); | |
| 450 desktopSize.add(new UpdateRectangleMessage(0,0, width, height, EncodingType.DESKTOP_SIZE).getMessage()); | |
| 99 | 451 addSerialNumber(desktopSize); |
| 96 | 452 multicastqueue.put(desktopSize); |
| 453 } | |
| 98 | 454 |
| 455 | |
| 456 public void addSerialNumber(LinkedList<ByteBuffer> bufs) { | |
| 457 ByteBuffer serialNum = multicastqueue.allocate(8); | |
| 458 serialNum.putLong(counter++); | |
| 459 serialNum.flip(); | |
| 460 bufs.addFirst(serialNum); | |
| 461 } | |
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462 |
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463 |
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464 public void resetDecoder() { |
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465 context.resetDecoder(); |
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466 } |
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467 |
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468 public void stopReceiverTask() { |
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469 if (context!=null) |
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470 context.cleanUpSession(null); |
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471 } |
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472 |
| 28 | 473 } |