Mercurial > hg > Applications > TreeVNC
annotate src/main/java/jp/ac/u_ryukyu/treevnc/MyRfbProto.java @ 77:cdf7bbe45885
remove some warnings
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 29 Apr 2014 18:00:34 +0900 |
| parents | f1938dd3b518 |
| children | 432dac0b9dae |
| rev | line source |
|---|---|
| 32 | 1 package jp.ac.u_ryukyu.treevnc; |
| 28 | 2 |
| 45 | 3 import java.io.DataOutputStream; |
| 28 | 4 import java.io.IOException; |
| 5 import java.net.Socket; | |
| 6 import java.nio.ByteBuffer; | |
| 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; |
| 12 | |
| 13 import com.glavsoft.exceptions.TransportException; | |
| 14 import com.glavsoft.rfb.protocol.Protocol; | |
| 15 import com.glavsoft.rfb.protocol.ProtocolContext; | |
| 16 import com.glavsoft.transport.Reader; | |
| 17 import com.glavsoft.transport.Writer; | |
| 65 | 18 import com.glavsoft.viewer.ViewerImpl; |
| 28 | 19 |
| 20 public class MyRfbProto { | |
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21 final static int FramebufferUpdateRequest = 3; |
| 28 | 22 final static int CheckDelay = 11; |
| 23 final static int FramebufferUpdate = 0; | |
| 24 private ProtocolContext context; | |
| 54 | 25 //final static String versionMsg_3_855 = "RFB 003.855\n"; |
| 26 final static String versionMsg_3_856 = "RFB 003.856\n"; | |
| 28 | 27 private int clients; |
| 32 | 28 protected MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new MulticastQueue<LinkedList<ByteBuffer>>(); |
| 28 | 29 private RequestScreenThread rThread; |
| 30 private boolean proxyFlag = true; | |
| 35 | 31 private EchoClient echo; |
| 45 | 32 private String proxyAddr; |
| 60 | 33 public int acceptPort; |
| 65 | 34 protected boolean readyReconnect; |
| 35 private boolean cuiVersion; | |
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36 |
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37 public MyRfbProto() { |
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38 rThread = new RequestScreenThread(this); |
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39 } |
| 28 | 40 |
| 41 | |
| 42 public void newClient(AcceptThread acceptThread, final Socket newCli, | |
| 43 final Writer os, final Reader is) throws IOException { | |
| 44 // createBimgFlag = true; | |
| 45 // rfb.addSockTmp(newCli); | |
| 46 // addSock(newCli); | |
| 47 final int myId = clients; | |
| 48 final MulticastQueue.Client<LinkedList<ByteBuffer>> c = multicastqueue.newClient(); | |
| 49 final AtomicInteger writerRunning = new AtomicInteger(); | |
| 50 writerRunning.set(1); | |
| 51 /** | |
| 52 * Timeout thread. If a client is suspended, it has top of queue | |
| 53 * indefinitely, which caused memory overflow. After the timeout, we | |
| 54 * poll the queue and discard it. Start long wait if writer is running. | |
| 55 */ | |
| 56 final Runnable timer = new Runnable() { | |
| 57 public void run() { | |
| 58 int count = 0; | |
| 59 for (;;) { | |
| 60 long timeout = 50000 / 8; | |
| 61 try { | |
| 62 synchronized (this) { | |
| 63 int state, flag; | |
| 64 writerRunning.set(0); | |
| 65 wait(timeout); | |
| 66 flag = 0; | |
| 67 while ((state = writerRunning.get()) == 0) { | |
| 68 c.poll(); // discard, should be timeout | |
| 69 count++; | |
| 70 if (flag == 0) { | |
| 71 System.out.println("Discarding " + myId | |
| 72 + " count=" + count); | |
| 73 flag = 1; | |
| 74 } | |
| 75 wait(10); // if this is too short, writer cannot | |
| 76 // take the poll, if this is too | |
| 77 // long, memory will overflow... | |
| 78 } | |
| 79 if (flag == 1) | |
| 80 System.out.println("Resuming " + myId | |
| 81 + " count=" + count); | |
| 82 if (state != 1) { | |
| 83 System.out.println("Client died " + myId); | |
| 84 break; | |
| 85 } | |
| 86 } | |
| 87 } catch (InterruptedException e) { | |
| 88 } | |
| 89 } | |
| 90 } | |
| 91 }; | |
| 92 new Thread(timer).start(); | |
| 93 /** | |
| 94 * discard all incoming from clients | |
| 95 */ | |
| 96 final Runnable reader = new Runnable() { | |
| 97 public void run() { | |
| 98 byte b[] = new byte[4096]; | |
| 99 for (;;) { | |
| 100 try { | |
| 101 int c = is.readByte(b); | |
| 102 if (c <= 0) | |
| 103 throw new IOException(); | |
| 104 // System.out.println("client read "+c); | |
| 105 } catch (IOException e) { | |
| 106 try { | |
| 107 writerRunning.set(2); | |
| 108 os.close(); | |
| 109 is.close(); | |
| 36 | 110 break; |
| 28 | 111 } catch (IOException e1) { |
| 112 } catch (TransportException e1) { | |
| 113 e1.printStackTrace(); | |
| 114 } | |
| 115 return; | |
| 116 } catch (TransportException e) { | |
| 117 e.printStackTrace(); | |
| 118 } | |
| 119 } | |
| 120 } | |
| 121 }; | |
| 122 /** | |
| 123 * send packets to a client | |
| 124 */ | |
| 125 Runnable sender = new Runnable() { | |
| 126 public void run() { | |
| 127 writerRunning.set(1); | |
| 128 try { | |
| 129 requestThreadNotify(); | |
| 130 // rThread.checkDelay(); | |
| 131 | |
| 132 /** | |
| 133 * initial connection of RFB protocol | |
| 134 */ | |
| 135 sendRfbVersion(os); | |
| 136 // readVersionMsg(is); | |
| 137 readVersionMsg(is, os); | |
| 138 sendSecurityType(os); | |
| 139 readSecType(is); | |
| 140 sendSecResult(os); | |
| 141 readClientInit(is); | |
| 142 sendInitData(os); | |
| 143 new Thread(reader).start(); // discard incoming packet here | |
| 144 // after. | |
| 145 // writeFramebufferUpdateRequest(0,0, framebufferWidth, | |
| 146 // framebufferHeight, false ); | |
| 147 for (;;) { | |
| 148 LinkedList<ByteBuffer> bufs = c.poll(); | |
| 149 int inputIndex = 0; | |
| 150 ByteBuffer header = bufs.get(inputIndex); | |
| 151 if (header == null) | |
| 152 continue; | |
| 153 else if (header.get(0) == CheckDelay) { | |
| 154 writeToClient(os, bufs, inputIndex); | |
| 155 continue; | |
| 156 } else if (header.get(0) == FramebufferUpdate) { | |
| 63 | 157 //System.out.println("client "+ myId); |
| 28 | 158 } |
| 159 /* | |
| 160 * if(i%20==0){ sendDataCheckDelay(); } i++; | |
| 161 */ | |
| 162 writeToClient(os, bufs, inputIndex); | |
| 163 writerRunning.set(1); // yes my client is awaking. | |
| 164 } | |
| 165 } catch (IOException e) { | |
| 166 try { | |
| 167 writerRunning.set(2); | |
| 168 os.close(); | |
| 169 } catch (IOException e1) { | |
| 170 } | |
| 171 /* if socket closed cliList.remove(newCli); */ | |
| 172 } catch (TransportException e) { | |
| 173 e.printStackTrace(); | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 public void writeToClient(final Writer os, | |
| 178 LinkedList<ByteBuffer> bufs, int inputIndex) | |
| 179 throws TransportException { | |
| 180 while (inputIndex < bufs.size()) { | |
| 181 ByteBuffer b = bufs.get(inputIndex++); | |
| 182 os.write(b.array(), b.position(), b.limit()); | |
| 183 } | |
| 184 os.flush(); | |
| 74 | 185 bufs = null; |
| 186 multicastqueue.heapAvailable(); | |
| 28 | 187 } |
| 188 }; | |
| 189 clients++; | |
| 190 new Thread(sender).start(); | |
| 191 | |
| 192 } | |
| 193 | |
| 194 public synchronized void requestThreadNotify() { | |
| 195 rThread.reStart(); | |
| 196 } | |
| 197 | |
| 198 private void sendRfbVersion(Writer writer) throws IOException, TransportException { | |
| 199 // os.write(versionMsg_3_8.getBytes()); | |
| 54 | 200 writer.write(versionMsg_3_856.getBytes()); |
| 28 | 201 } |
| 202 | |
| 203 private int readVersionMsg(Reader reader, Writer writer) throws IOException, TransportException { | |
| 204 | |
| 205 byte[] b = new byte[12]; | |
| 206 | |
| 207 reader.readBytes(b); | |
| 208 | |
| 209 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ') | |
| 210 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9') | |
| 211 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.') | |
| 212 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9') | |
| 213 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) { | |
| 214 throw new IOException("this is not an RFB server"); | |
| 215 } | |
| 216 | |
| 217 int rfbMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0'); | |
| 218 int rfbMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0'); | |
| 219 | |
| 220 if (rfbMajor < 3) { | |
| 221 throw new IOException( | |
| 222 "RFB server does not support protocol version 3"); | |
| 223 } | |
| 224 | |
| 225 if (rfbMinor == 855) { | |
| 226 sendProxyFlag(writer); | |
| 227 if (proxyFlag) | |
| 228 sendPortNumber(writer); | |
| 229 } | |
| 230 return rfbMinor; | |
| 231 } | |
| 45 | 232 |
| 233 public void screenChangeRequest() throws IOException { | |
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234 Socket echoSocket = new Socket(proxyAddr, 10002); |
| 45 | 235 DataOutputStream os = new DataOutputStream(echoSocket.getOutputStream()); |
| 236 os.writeBytes(echo.getMyAddress()+"\n"); | |
| 59 | 237 //os.writeBytes(String.valueOf(echo.client.getFrameWidth())+"\n"); temp comment out for rebuild |
| 238 //os.writeBytes(String.valueOf(echo.client.getFrameHeight())+"\n"); temp comment out for rebuild | |
| 45 | 239 os.close(); |
| 77 | 240 echoSocket.close(); |
| 45 | 241 } |
| 28 | 242 |
| 243 private void sendProxyFlag(Writer writer) throws TransportException { | |
| 244 if (proxyFlag) | |
| 245 writer.writeInt(1); | |
| 246 else | |
| 247 writer.writeInt(0); | |
| 248 } | |
| 249 | |
| 250 private void sendPortNumber(Writer writer) throws TransportException { | |
| 251 byte[] b = new byte[4]; | |
| 252 //b = castIntByte(getHost.getPort()); | |
| 253 b = castIntByte(9999); | |
| 254 writer.write(b); | |
| 255 } | |
| 256 | |
| 257 private byte[] castIntByte(int len) { | |
| 258 byte[] b = new byte[4]; | |
| 259 b[0] = (byte) ((len >>> 24) & 0xFF); | |
| 260 b[1] = (byte) ((len >>> 16) & 0xFF); | |
| 261 b[2] = (byte) ((len >>> 8) & 0xFF); | |
| 262 b[3] = (byte) ((len >>> 0) & 0xFF); | |
| 263 return b; | |
| 264 } | |
| 265 | |
| 45 | 266 |
| 28 | 267 private void readSecType(Reader reader) throws TransportException { |
| 268 byte[] b = new byte[1]; | |
| 269 reader.read(b); | |
| 270 } | |
| 271 | |
| 272 private void sendSecurityType(Writer os) throws TransportException { | |
| 273 // number-of-security-types | |
| 274 os.writeInt(1); | |
| 275 // security-types | |
| 276 // 1:None | |
| 277 os.writeInt(1); | |
| 278 | |
| 279 /* | |
| 280 * os.write(4); os.write(30); os.write(31); os.write(32); os.write(35); | |
| 281 * os.flush(); | |
| 282 */ | |
| 283 } | |
| 284 | |
| 285 private void sendSecResult(Writer os) throws TransportException { | |
| 286 byte[] b = castIntByte(0); | |
| 287 os.write(b); | |
| 288 } | |
| 289 | |
| 290 private void readClientInit(Reader in) throws TransportException { | |
| 291 byte[] b = new byte[0]; | |
| 292 in.readBytes(b); | |
| 293 } | |
| 294 | |
| 295 private void sendInitData(Writer os) throws TransportException { | |
| 296 os.write(context.getInitData()); | |
| 297 } | |
| 298 | |
| 299 public void setProtocolContext(Protocol workingProtocol) { | |
| 300 context = workingProtocol; | |
| 301 } | |
| 29 | 302 |
| 303 | |
| 304 public void readSendData(int dataLen, Reader reader) throws TransportException { | |
| 305 | |
| 306 } | |
| 31 | 307 |
| 308 public Socket accept() throws IOException { | |
| 309 return null; | |
| 310 } | |
| 311 | |
| 38 | 312 public int selectPort(int port) { |
| 313 return port; | |
| 31 | 314 } |
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315 |
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316 |
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317 public void writeFramebufferUpdateRequest(int x, int y, int w, int h, |
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318 boolean incremental) throws TransportException { |
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319 byte[] b = new byte[10]; |
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320 |
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321 b[0] = (byte) FramebufferUpdateRequest; // 3 is FrameBufferUpdateRequest |
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322 b[1] = (byte) (incremental ? 1 : 0); |
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323 b[2] = (byte) ((x >> 8) & 0xff); |
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324 b[3] = (byte) (x & 0xff); |
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325 b[4] = (byte) ((y >> 8) & 0xff); |
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326 b[5] = (byte) (y & 0xff); |
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327 b[6] = (byte) ((w >> 8) & 0xff); |
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328 b[7] = (byte) (w & 0xff); |
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329 b[8] = (byte) ((h >> 8) & 0xff); |
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330 b[9] = (byte) (h & 0xff); |
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331 |
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332 // os.write(b); |
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333 } |
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334 |
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335 public void notProxy() { |
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336 proxyFlag = false; |
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337 } |
| 35 | 338 |
| 339 public void setEcho(EchoClient _echo) { | |
| 340 echo = _echo; | |
| 341 } | |
| 342 | |
| 65 | 343 public void setViewer(ViewerImpl v) { |
| 36 | 344 echo.setViewer(v); |
| 345 } | |
| 346 | |
| 65 | 347 public ViewerImpl getViewer() { |
| 348 return echo.getViewer(); | |
| 349 } | |
| 350 | |
| 35 | 351 public EchoClient getEcho() { |
| 352 return echo; | |
| 353 } | |
| 43 | 354 |
| 355 public void setTerminationType(boolean setType) { | |
| 356 /*nop*/ | |
| 357 } | |
| 358 | |
| 359 public boolean getTerminationType() { | |
| 360 /*nop*/ | |
| 361 return true; | |
| 362 } | |
| 45 | 363 |
| 364 public void setProxyAddr(String proxyAddr) { | |
| 365 this.proxyAddr = proxyAddr; | |
| 366 } | |
| 52 | 367 |
| 368 | |
| 369 public void close() { | |
| 370 //nothing | |
| 371 } | |
| 45 | 372 |
| 60 | 373 public int getAcceptPort() { |
| 374 return 0; | |
| 375 } | |
| 376 | |
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377 public boolean getReadyReconnect() { |
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378 return readyReconnect; |
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379 } |
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380 |
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381 public void setReadyReconnect(boolean ready) { |
| 65 | 382 } |
| 383 | |
| 384 | |
| 385 public boolean getCuiVersion() { | |
| 386 return cuiVersion; | |
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387 } |
| 65 | 388 |
| 389 public void setCuiVersion(boolean flag) { | |
| 390 cuiVersion = flag; | |
| 391 } | |
| 66 | 392 |
| 393 public void readCheckDelay(Reader reader) throws TransportException { | |
| 394 | |
| 395 } | |
| 396 | |
| 397 public String getProxyAddr() { | |
| 398 return proxyAddr; | |
| 399 } | |
| 65 | 400 |
| 28 | 401 } |