Mercurial > hg > Applications > TreeVNC
annotate src/main/java/jp/ac/u_ryukyu/treevnc/MyRfbProto.java @ 111:a7988d3c0266
minor fix.
| author | oc |
|---|---|
| date | Fri, 23 May 2014 20:24:43 +0900 |
| parents | 464eb64e3fd6 |
| children | 918dc3ee1c79 |
| 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 |
| 111 | 46 public void setVncProxy(VncProxyService viewer) { |
| 107 | 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); | |
| 111 | 127 System.out.println("Root server change request :" + newHostName); |
| 107 | 128 // please remove these numbers. |
| 129 if (viewer != null) { | |
| 130 viewer.changeVNCServer(newHostName, 3200, 1980); | |
| 131 } | |
| 132 } else { | |
| 133 continue; | |
| 134 } | |
| 135 } | |
| 110 | 136 } else if (b[0] == ClientToServerMessage.SERVER_CHANGE_REQUEST) { |
| 107 | 137 context.getWriter().write(b); |
| 138 } | |
| 28 | 139 // System.out.println("client read "+c); |
| 89 | 140 } catch (Exception e) { |
| 28 | 141 try { |
| 142 writerRunning.set(2); | |
| 143 os.close(); | |
| 144 is.close(); | |
| 36 | 145 break; |
| 28 | 146 } catch (IOException e1) { |
| 147 } catch (TransportException e1) { | |
| 148 e1.printStackTrace(); | |
| 149 } | |
| 150 return; | |
| 151 } | |
| 152 } | |
| 153 } | |
| 107 | 154 |
| 155 private boolean permitChangeScreen() { | |
| 109 | 156 return true; |
| 107 | 157 } |
| 28 | 158 }; |
| 159 /** | |
| 160 * send packets to a client | |
| 161 */ | |
| 162 Runnable sender = new Runnable() { | |
| 163 public void run() { | |
| 164 writerRunning.set(1); | |
| 165 try { | |
| 166 requestThreadNotify(); | |
| 167 | |
| 168 /** | |
| 169 * initial connection of RFB protocol | |
| 170 */ | |
| 171 sendRfbVersion(os); | |
| 172 // readVersionMsg(is); | |
| 173 readVersionMsg(is, os); | |
| 174 sendSecurityType(os); | |
| 175 readSecType(is); | |
| 176 sendSecResult(os); | |
| 177 readClientInit(is); | |
| 178 sendInitData(os); | |
| 88 | 179 // after this, we discard upward packet. |
| 180 new Thread(reader, "discard-upward-comm").start(); | |
| 28 | 181 // writeFramebufferUpdateRequest(0,0, framebufferWidth, |
| 182 // framebufferHeight, false ); | |
| 183 for (;;) { | |
| 184 LinkedList<ByteBuffer> bufs = c.poll(); | |
| 185 int inputIndex = 0; | |
| 186 ByteBuffer header = bufs.get(inputIndex); | |
| 187 if (header == null) | |
| 188 continue; | |
| 189 else if (header.get(0) == CheckDelay) { | |
| 190 writeToClient(os, bufs, inputIndex); | |
| 191 continue; | |
| 192 } else if (header.get(0) == FramebufferUpdate) { | |
| 63 | 193 //System.out.println("client "+ myId); |
| 28 | 194 } |
| 195 /* | |
| 196 * if(i%20==0){ sendDataCheckDelay(); } i++; | |
| 197 */ | |
| 198 writeToClient(os, bufs, inputIndex); | |
| 199 writerRunning.set(1); // yes my client is awaking. | |
| 200 } | |
| 89 | 201 } catch (Exception e) { |
| 28 | 202 try { |
| 203 writerRunning.set(2); | |
| 204 os.close(); | |
| 205 } catch (IOException e1) { | |
| 206 } | |
| 207 /* if socket closed cliList.remove(newCli); */ | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 public void writeToClient(final Writer os, | |
| 212 LinkedList<ByteBuffer> bufs, int inputIndex) | |
| 213 throws TransportException { | |
| 214 while (inputIndex < bufs.size()) { | |
| 215 ByteBuffer b = bufs.get(inputIndex++); | |
| 216 os.write(b.array(), b.position(), b.limit()); | |
| 217 } | |
| 218 os.flush(); | |
| 74 | 219 bufs = null; |
| 220 multicastqueue.heapAvailable(); | |
| 28 | 221 } |
| 222 }; | |
| 223 clients++; | |
| 88 | 224 new Thread(sender, "writer-to-lower-node").start(); |
| 28 | 225 |
| 226 } | |
| 227 | |
| 88 | 228 public void requestThreadNotify() { |
| 28 | 229 rThread.reStart(); |
| 230 } | |
| 231 | |
| 232 private void sendRfbVersion(Writer writer) throws IOException, TransportException { | |
| 233 // os.write(versionMsg_3_8.getBytes()); | |
| 54 | 234 writer.write(versionMsg_3_856.getBytes()); |
| 28 | 235 } |
| 236 | |
| 237 private int readVersionMsg(Reader reader, Writer writer) throws IOException, TransportException { | |
| 238 | |
| 239 byte[] b = new byte[12]; | |
| 240 | |
| 241 reader.readBytes(b); | |
| 242 | |
| 243 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ') | |
| 244 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9') | |
| 245 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.') | |
| 246 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9') | |
| 247 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) { | |
| 248 throw new IOException("this is not an RFB server"); | |
| 249 } | |
| 250 | |
| 251 int rfbMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0'); | |
| 252 int rfbMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0'); | |
| 253 | |
| 254 if (rfbMajor < 3) { | |
| 255 throw new IOException( | |
| 256 "RFB server does not support protocol version 3"); | |
| 257 } | |
| 258 | |
| 259 if (rfbMinor == 855) { | |
| 260 sendProxyFlag(writer); | |
| 261 if (proxyFlag) | |
| 262 sendPortNumber(writer); | |
| 263 } | |
| 264 return rfbMinor; | |
| 265 } | |
| 45 | 266 |
| 107 | 267 public void screenChangeRequest() throws TransportException { |
| 268 new ScreenChangeRequest(echo.getMyAddress().getBytes()).send(context.getWriter()); | |
| 45 | 269 } |
| 28 | 270 |
| 271 private void sendProxyFlag(Writer writer) throws TransportException { | |
| 272 if (proxyFlag) | |
| 273 writer.writeInt(1); | |
| 274 else | |
| 275 writer.writeInt(0); | |
| 276 } | |
| 277 | |
| 278 private void sendPortNumber(Writer writer) throws TransportException { | |
| 279 byte[] b = new byte[4]; | |
| 280 //b = castIntByte(getHost.getPort()); | |
| 281 b = castIntByte(9999); | |
| 282 writer.write(b); | |
| 283 } | |
| 284 | |
| 285 private byte[] castIntByte(int len) { | |
| 286 byte[] b = new byte[4]; | |
| 287 b[0] = (byte) ((len >>> 24) & 0xFF); | |
| 288 b[1] = (byte) ((len >>> 16) & 0xFF); | |
| 289 b[2] = (byte) ((len >>> 8) & 0xFF); | |
| 290 b[3] = (byte) ((len >>> 0) & 0xFF); | |
| 291 return b; | |
| 292 } | |
| 293 | |
| 45 | 294 |
| 28 | 295 private void readSecType(Reader reader) throws TransportException { |
| 296 byte[] b = new byte[1]; | |
| 297 reader.read(b); | |
| 298 } | |
| 299 | |
| 300 private void sendSecurityType(Writer os) throws TransportException { | |
| 301 // number-of-security-types | |
| 302 os.writeInt(1); | |
| 303 // security-types | |
| 304 // 1:None | |
| 305 os.writeInt(1); | |
| 306 | |
| 307 /* | |
| 308 * os.write(4); os.write(30); os.write(31); os.write(32); os.write(35); | |
| 309 * os.flush(); | |
| 310 */ | |
| 311 } | |
| 312 | |
| 313 private void sendSecResult(Writer os) throws TransportException { | |
| 314 byte[] b = castIntByte(0); | |
| 315 os.write(b); | |
| 316 } | |
| 317 | |
| 318 private void readClientInit(Reader in) throws TransportException { | |
| 319 byte[] b = new byte[0]; | |
| 320 in.readBytes(b); | |
| 321 } | |
| 322 | |
| 85 | 323 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 | 324 private void sendInitData(Writer os) throws TransportException { |
| 85 | 325 // In case of "-d" we have no context |
| 326 if (context != null){ | |
| 327 os.write(context.getInitData()); | |
| 328 } else { | |
| 329 // Send dummy data | |
| 330 os.write(initData); | |
| 331 } | |
| 28 | 332 } |
| 333 | |
| 334 public void setProtocolContext(Protocol workingProtocol) { | |
| 335 context = workingProtocol; | |
| 336 } | |
| 29 | 337 |
| 338 | |
| 339 public void readSendData(int dataLen, Reader reader) throws TransportException { | |
| 340 | |
| 341 } | |
| 31 | 342 |
| 343 public Socket accept() throws IOException { | |
| 344 return null; | |
| 345 } | |
| 346 | |
| 38 | 347 public int selectPort(int port) { |
| 348 return port; | |
| 31 | 349 } |
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350 |
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351 |
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352 public void writeFramebufferUpdateRequest(int x, int y, int w, int h, |
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353 boolean incremental) throws TransportException { |
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354 byte[] b = new byte[10]; |
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355 |
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356 b[0] = (byte) FramebufferUpdateRequest; // 3 is FrameBufferUpdateRequest |
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357 b[1] = (byte) (incremental ? 1 : 0); |
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358 b[2] = (byte) ((x >> 8) & 0xff); |
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359 b[3] = (byte) (x & 0xff); |
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360 b[4] = (byte) ((y >> 8) & 0xff); |
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361 b[5] = (byte) (y & 0xff); |
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362 b[6] = (byte) ((w >> 8) & 0xff); |
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363 b[7] = (byte) (w & 0xff); |
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364 b[8] = (byte) ((h >> 8) & 0xff); |
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365 b[9] = (byte) (h & 0xff); |
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366 |
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367 // os.write(b); |
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368 } |
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369 |
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370 public void notProxy() { |
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371 proxyFlag = false; |
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372 } |
| 35 | 373 |
| 374 public void setEcho(EchoClient _echo) { | |
| 375 echo = _echo; | |
| 376 } | |
| 377 | |
| 65 | 378 public void setViewer(ViewerImpl v) { |
| 36 | 379 echo.setViewer(v); |
| 380 } | |
| 381 | |
| 65 | 382 public ViewerImpl getViewer() { |
| 383 return echo.getViewer(); | |
| 384 } | |
| 385 | |
| 35 | 386 public EchoClient getEcho() { |
| 387 return echo; | |
| 388 } | |
| 43 | 389 |
| 390 public void setTerminationType(boolean setType) { | |
| 391 /*nop*/ | |
| 392 } | |
| 393 | |
| 394 public boolean getTerminationType() { | |
| 395 /*nop*/ | |
| 396 return true; | |
| 397 } | |
| 45 | 398 |
| 399 public void setProxyAddr(String proxyAddr) { | |
| 400 this.proxyAddr = proxyAddr; | |
| 401 } | |
| 52 | 402 |
| 403 | |
| 404 public void close() { | |
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405 // none |
| 52 | 406 } |
| 45 | 407 |
| 60 | 408 public int getAcceptPort() { |
| 409 return 0; | |
| 410 } | |
| 411 | |
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412 public boolean getReadyReconnect() { |
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413 return readyReconnect; |
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414 } |
| 65 | 415 |
| 416 | |
| 417 public boolean getCuiVersion() { | |
| 418 return cuiVersion; | |
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419 } |
| 65 | 420 |
| 421 public void setCuiVersion(boolean flag) { | |
| 422 cuiVersion = flag; | |
| 423 } | |
| 66 | 424 |
| 425 public void readCheckDelay(Reader reader) throws TransportException { | |
| 426 | |
| 427 } | |
| 428 | |
| 429 public String getProxyAddr() { | |
| 430 return proxyAddr; | |
| 431 } | |
| 65 | 432 |
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433 public synchronized void setReadyReconnect(boolean ready) { |
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434 readyReconnect = ready; |
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435 if (ready) { |
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436 notifyAll(); |
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437 } |
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438 } |
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439 |
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440 public synchronized void waitForReady(VncProxyService vncProxyService) throws InterruptedException { |
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441 while (!readyReconnect) { |
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442 wait(); |
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443 } |
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444 } |
| 96 | 445 |
| 446 | |
| 447 public void sendDesktopSizeChange() { | |
| 448 LinkedList<ByteBuffer> desktopSize = new LinkedList<ByteBuffer>(); | |
| 97 | 449 int width = context.getFbWidth(); |
| 450 int height = context.getFbHeight(); | |
| 451 desktopSize.add(new UpdateRectangleMessage(0,0, width, height, EncodingType.DESKTOP_SIZE).getMessage()); | |
| 99 | 452 addSerialNumber(desktopSize); |
| 96 | 453 multicastqueue.put(desktopSize); |
| 454 } | |
| 98 | 455 |
| 456 | |
| 457 public void addSerialNumber(LinkedList<ByteBuffer> bufs) { | |
| 458 ByteBuffer serialNum = multicastqueue.allocate(8); | |
| 459 serialNum.putLong(counter++); | |
| 460 serialNum.flip(); | |
| 461 bufs.addFirst(serialNum); | |
| 462 } | |
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463 |
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464 |
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465 public void resetDecoder() { |
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466 context.resetDecoder(); |
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467 } |
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468 |
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469 public void stopReceiverTask() { |
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470 if (context!=null) |
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471 context.cleanUpSession(null); |
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472 } |
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473 |
| 28 | 474 } |