Mercurial > hg > Applications > TreeVNC
annotate src/main/java/jp/ac/u_ryukyu/treevnc/MyRfbProto.java @ 94:75879c316796
synchronized wait for Rfb initialization in change server.
| author | oc |
|---|---|
| date | Mon, 19 May 2014 19:57:32 +0900 |
| parents | 1503a373ab73 |
| children | 76e49dd9c9c5 |
| 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; |
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12 import jp.ac.u_ryukyu.treevnc.server.VncProxyService; |
| 28 | 13 |
| 14 import com.glavsoft.exceptions.TransportException; | |
| 15 import com.glavsoft.rfb.protocol.Protocol; | |
| 16 import com.glavsoft.rfb.protocol.ProtocolContext; | |
| 17 import com.glavsoft.transport.Reader; | |
| 18 import com.glavsoft.transport.Writer; | |
| 65 | 19 import com.glavsoft.viewer.ViewerImpl; |
| 28 | 20 |
| 21 public class MyRfbProto { | |
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22 final static int FramebufferUpdateRequest = 3; |
| 28 | 23 final static int CheckDelay = 11; |
| 24 final static int FramebufferUpdate = 0; | |
| 25 private ProtocolContext context; | |
| 54 | 26 //final static String versionMsg_3_855 = "RFB 003.855\n"; |
| 27 final static String versionMsg_3_856 = "RFB 003.856\n"; | |
| 28 | 28 private int clients; |
| 32 | 29 protected MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new MulticastQueue<LinkedList<ByteBuffer>>(); |
| 28 | 30 private RequestScreenThread rThread; |
| 31 private boolean proxyFlag = true; | |
| 35 | 32 private EchoClient echo; |
| 45 | 33 private String proxyAddr; |
| 60 | 34 public int acceptPort; |
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35 protected boolean readyReconnect = false; |
| 65 | 36 private boolean cuiVersion; |
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37 |
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38 public MyRfbProto() { |
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39 rThread = new RequestScreenThread(this); |
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40 } |
| 28 | 41 |
| 42 | |
| 43 public void newClient(AcceptThread acceptThread, final Socket newCli, | |
| 44 final Writer os, final Reader is) throws IOException { | |
| 45 // createBimgFlag = true; | |
| 46 // rfb.addSockTmp(newCli); | |
| 47 // addSock(newCli); | |
| 48 final int myId = clients; | |
| 49 final MulticastQueue.Client<LinkedList<ByteBuffer>> c = multicastqueue.newClient(); | |
| 50 final AtomicInteger writerRunning = new AtomicInteger(); | |
| 51 writerRunning.set(1); | |
| 52 /** | |
| 53 * Timeout thread. If a client is suspended, it has top of queue | |
| 54 * indefinitely, which caused memory overflow. After the timeout, we | |
| 55 * poll the queue and discard it. Start long wait if writer is running. | |
| 56 */ | |
| 57 final Runnable timer = new Runnable() { | |
| 58 public void run() { | |
| 59 int count = 0; | |
| 60 for (;;) { | |
| 61 long timeout = 50000 / 8; | |
| 62 try { | |
| 63 synchronized (this) { | |
| 64 int state, flag; | |
| 65 writerRunning.set(0); | |
| 66 wait(timeout); | |
| 67 flag = 0; | |
| 68 while ((state = writerRunning.get()) == 0) { | |
| 69 c.poll(); // discard, should be timeout | |
| 70 count++; | |
| 71 if (flag == 0) { | |
| 72 System.out.println("Discarding " + myId | |
| 73 + " count=" + count); | |
| 74 flag = 1; | |
| 75 } | |
| 76 wait(10); // if this is too short, writer cannot | |
| 77 // take the poll, if this is too | |
| 78 // long, memory will overflow... | |
| 79 } | |
| 80 if (flag == 1) | |
| 81 System.out.println("Resuming " + myId | |
| 82 + " count=" + count); | |
| 83 if (state != 1) { | |
| 84 System.out.println("Client died " + myId); | |
| 85 break; | |
| 86 } | |
| 87 } | |
| 88 } catch (InterruptedException e) { | |
| 89 } | |
| 90 } | |
| 91 } | |
| 92 }; | |
| 88 | 93 new Thread(timer, "timer-discard-multicastqueue").start(); |
| 28 | 94 /** |
| 95 * discard all incoming from clients | |
| 96 */ | |
| 97 final Runnable reader = new Runnable() { | |
| 98 public void run() { | |
| 99 byte b[] = new byte[4096]; | |
| 100 for (;;) { | |
| 101 try { | |
| 102 int c = is.readByte(b); | |
| 103 if (c <= 0) | |
| 104 throw new IOException(); | |
| 105 // System.out.println("client read "+c); | |
| 89 | 106 } catch (Exception e) { |
| 28 | 107 try { |
| 108 writerRunning.set(2); | |
| 109 os.close(); | |
| 110 is.close(); | |
| 36 | 111 break; |
| 28 | 112 } catch (IOException e1) { |
| 113 } catch (TransportException e1) { | |
| 114 e1.printStackTrace(); | |
| 115 } | |
| 116 return; | |
| 117 } | |
| 118 } | |
| 119 } | |
| 120 }; | |
| 121 /** | |
| 122 * send packets to a client | |
| 123 */ | |
| 124 Runnable sender = new Runnable() { | |
| 125 public void run() { | |
| 126 writerRunning.set(1); | |
| 127 try { | |
| 128 requestThreadNotify(); | |
| 129 | |
| 130 /** | |
| 131 * initial connection of RFB protocol | |
| 132 */ | |
| 133 sendRfbVersion(os); | |
| 134 // readVersionMsg(is); | |
| 135 readVersionMsg(is, os); | |
| 136 sendSecurityType(os); | |
| 137 readSecType(is); | |
| 138 sendSecResult(os); | |
| 139 readClientInit(is); | |
| 140 sendInitData(os); | |
| 88 | 141 // after this, we discard upward packet. |
| 142 new Thread(reader, "discard-upward-comm").start(); | |
| 28 | 143 // writeFramebufferUpdateRequest(0,0, framebufferWidth, |
| 144 // framebufferHeight, false ); | |
| 145 for (;;) { | |
| 146 LinkedList<ByteBuffer> bufs = c.poll(); | |
| 147 int inputIndex = 0; | |
| 148 ByteBuffer header = bufs.get(inputIndex); | |
| 149 if (header == null) | |
| 150 continue; | |
| 151 else if (header.get(0) == CheckDelay) { | |
| 152 writeToClient(os, bufs, inputIndex); | |
| 153 continue; | |
| 154 } else if (header.get(0) == FramebufferUpdate) { | |
| 63 | 155 //System.out.println("client "+ myId); |
| 28 | 156 } |
| 157 /* | |
| 158 * if(i%20==0){ sendDataCheckDelay(); } i++; | |
| 159 */ | |
| 160 writeToClient(os, bufs, inputIndex); | |
| 161 writerRunning.set(1); // yes my client is awaking. | |
| 162 } | |
| 89 | 163 } catch (Exception e) { |
| 28 | 164 try { |
| 165 writerRunning.set(2); | |
| 166 os.close(); | |
| 167 } catch (IOException e1) { | |
| 168 } | |
| 169 /* if socket closed cliList.remove(newCli); */ | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 public void writeToClient(final Writer os, | |
| 174 LinkedList<ByteBuffer> bufs, int inputIndex) | |
| 175 throws TransportException { | |
| 176 while (inputIndex < bufs.size()) { | |
| 177 ByteBuffer b = bufs.get(inputIndex++); | |
| 178 os.write(b.array(), b.position(), b.limit()); | |
| 179 } | |
| 180 os.flush(); | |
| 74 | 181 bufs = null; |
| 182 multicastqueue.heapAvailable(); | |
| 28 | 183 } |
| 184 }; | |
| 185 clients++; | |
| 88 | 186 new Thread(sender, "writer-to-lower-node").start(); |
| 28 | 187 |
| 188 } | |
| 189 | |
| 88 | 190 public void requestThreadNotify() { |
| 28 | 191 rThread.reStart(); |
| 192 } | |
| 193 | |
| 194 private void sendRfbVersion(Writer writer) throws IOException, TransportException { | |
| 195 // os.write(versionMsg_3_8.getBytes()); | |
| 54 | 196 writer.write(versionMsg_3_856.getBytes()); |
| 28 | 197 } |
| 198 | |
| 199 private int readVersionMsg(Reader reader, Writer writer) throws IOException, TransportException { | |
| 200 | |
| 201 byte[] b = new byte[12]; | |
| 202 | |
| 203 reader.readBytes(b); | |
| 204 | |
| 205 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ') | |
| 206 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9') | |
| 207 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.') | |
| 208 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9') | |
| 209 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) { | |
| 210 throw new IOException("this is not an RFB server"); | |
| 211 } | |
| 212 | |
| 213 int rfbMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0'); | |
| 214 int rfbMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0'); | |
| 215 | |
| 216 if (rfbMajor < 3) { | |
| 217 throw new IOException( | |
| 218 "RFB server does not support protocol version 3"); | |
| 219 } | |
| 220 | |
| 221 if (rfbMinor == 855) { | |
| 222 sendProxyFlag(writer); | |
| 223 if (proxyFlag) | |
| 224 sendPortNumber(writer); | |
| 225 } | |
| 226 return rfbMinor; | |
| 227 } | |
| 45 | 228 |
| 229 public void screenChangeRequest() throws IOException { | |
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230 Socket echoSocket = new Socket(proxyAddr, 10002); |
| 45 | 231 DataOutputStream os = new DataOutputStream(echoSocket.getOutputStream()); |
| 232 os.writeBytes(echo.getMyAddress()+"\n"); | |
| 59 | 233 //os.writeBytes(String.valueOf(echo.client.getFrameWidth())+"\n"); temp comment out for rebuild |
| 234 //os.writeBytes(String.valueOf(echo.client.getFrameHeight())+"\n"); temp comment out for rebuild | |
| 45 | 235 os.close(); |
| 77 | 236 echoSocket.close(); |
| 45 | 237 } |
| 28 | 238 |
| 239 private void sendProxyFlag(Writer writer) throws TransportException { | |
| 240 if (proxyFlag) | |
| 241 writer.writeInt(1); | |
| 242 else | |
| 243 writer.writeInt(0); | |
| 244 } | |
| 245 | |
| 246 private void sendPortNumber(Writer writer) throws TransportException { | |
| 247 byte[] b = new byte[4]; | |
| 248 //b = castIntByte(getHost.getPort()); | |
| 249 b = castIntByte(9999); | |
| 250 writer.write(b); | |
| 251 } | |
| 252 | |
| 253 private byte[] castIntByte(int len) { | |
| 254 byte[] b = new byte[4]; | |
| 255 b[0] = (byte) ((len >>> 24) & 0xFF); | |
| 256 b[1] = (byte) ((len >>> 16) & 0xFF); | |
| 257 b[2] = (byte) ((len >>> 8) & 0xFF); | |
| 258 b[3] = (byte) ((len >>> 0) & 0xFF); | |
| 259 return b; | |
| 260 } | |
| 261 | |
| 45 | 262 |
| 28 | 263 private void readSecType(Reader reader) throws TransportException { |
| 264 byte[] b = new byte[1]; | |
| 265 reader.read(b); | |
| 266 } | |
| 267 | |
| 268 private void sendSecurityType(Writer os) throws TransportException { | |
| 269 // number-of-security-types | |
| 270 os.writeInt(1); | |
| 271 // security-types | |
| 272 // 1:None | |
| 273 os.writeInt(1); | |
| 274 | |
| 275 /* | |
| 276 * os.write(4); os.write(30); os.write(31); os.write(32); os.write(35); | |
| 277 * os.flush(); | |
| 278 */ | |
| 279 } | |
| 280 | |
| 281 private void sendSecResult(Writer os) throws TransportException { | |
| 282 byte[] b = castIntByte(0); | |
| 283 os.write(b); | |
| 284 } | |
| 285 | |
| 286 private void readClientInit(Reader in) throws TransportException { | |
| 287 byte[] b = new byte[0]; | |
| 288 in.readBytes(b); | |
| 289 } | |
| 290 | |
| 85 | 291 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}; |
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292 protected VncProxyService waiter; |
| 28 | 293 private void sendInitData(Writer os) throws TransportException { |
| 85 | 294 // In case of "-d" we have no context |
| 295 if (context != null){ | |
| 296 os.write(context.getInitData()); | |
| 297 } else { | |
| 298 // Send dummy data | |
| 299 os.write(initData); | |
| 300 | |
| 301 } | |
| 28 | 302 } |
| 303 | |
| 304 public void setProtocolContext(Protocol workingProtocol) { | |
| 305 context = workingProtocol; | |
| 306 } | |
| 29 | 307 |
| 308 | |
| 309 public void readSendData(int dataLen, Reader reader) throws TransportException { | |
| 310 | |
| 311 } | |
| 31 | 312 |
| 313 public Socket accept() throws IOException { | |
| 314 return null; | |
| 315 } | |
| 316 | |
| 38 | 317 public int selectPort(int port) { |
| 318 return port; | |
| 31 | 319 } |
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320 |
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321 |
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322 public void writeFramebufferUpdateRequest(int x, int y, int w, int h, |
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323 boolean incremental) throws TransportException { |
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324 byte[] b = new byte[10]; |
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325 |
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326 b[0] = (byte) FramebufferUpdateRequest; // 3 is FrameBufferUpdateRequest |
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327 b[1] = (byte) (incremental ? 1 : 0); |
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328 b[2] = (byte) ((x >> 8) & 0xff); |
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329 b[3] = (byte) (x & 0xff); |
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330 b[4] = (byte) ((y >> 8) & 0xff); |
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331 b[5] = (byte) (y & 0xff); |
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332 b[6] = (byte) ((w >> 8) & 0xff); |
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333 b[7] = (byte) (w & 0xff); |
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334 b[8] = (byte) ((h >> 8) & 0xff); |
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335 b[9] = (byte) (h & 0xff); |
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336 |
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337 // os.write(b); |
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338 } |
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339 |
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340 public void notProxy() { |
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341 proxyFlag = false; |
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342 } |
| 35 | 343 |
| 344 public void setEcho(EchoClient _echo) { | |
| 345 echo = _echo; | |
| 346 } | |
| 347 | |
| 65 | 348 public void setViewer(ViewerImpl v) { |
| 36 | 349 echo.setViewer(v); |
| 350 } | |
| 351 | |
| 65 | 352 public ViewerImpl getViewer() { |
| 353 return echo.getViewer(); | |
| 354 } | |
| 355 | |
| 35 | 356 public EchoClient getEcho() { |
| 357 return echo; | |
| 358 } | |
| 43 | 359 |
| 360 public void setTerminationType(boolean setType) { | |
| 361 /*nop*/ | |
| 362 } | |
| 363 | |
| 364 public boolean getTerminationType() { | |
| 365 /*nop*/ | |
| 366 return true; | |
| 367 } | |
| 45 | 368 |
| 369 public void setProxyAddr(String proxyAddr) { | |
| 370 this.proxyAddr = proxyAddr; | |
| 371 } | |
| 52 | 372 |
| 373 | |
| 374 public void close() { | |
| 375 //nothing | |
| 376 } | |
| 45 | 377 |
| 60 | 378 public int getAcceptPort() { |
| 379 return 0; | |
| 380 } | |
| 381 | |
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382 public boolean getReadyReconnect() { |
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383 return readyReconnect; |
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384 } |
| 65 | 385 |
| 386 | |
| 387 public boolean getCuiVersion() { | |
| 388 return cuiVersion; | |
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389 } |
| 65 | 390 |
| 391 public void setCuiVersion(boolean flag) { | |
| 392 cuiVersion = flag; | |
| 393 } | |
| 66 | 394 |
| 395 public void readCheckDelay(Reader reader) throws TransportException { | |
| 396 | |
| 397 } | |
| 398 | |
| 399 public String getProxyAddr() { | |
| 400 return proxyAddr; | |
| 401 } | |
| 65 | 402 |
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403 public synchronized void setReadyReconnect(boolean ready) { |
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404 readyReconnect = ready; |
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405 if (ready) { |
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406 notifyAll(); |
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407 } |
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408 } |
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409 |
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410 public synchronized void waitForReady(VncProxyService vncProxyService) throws InterruptedException { |
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411 while (!readyReconnect) { |
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412 wait(); |
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413 } |
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75879c316796
synchronized wait for Rfb initialization in change server.
oc
parents:
89
diff
changeset
|
414 } |
|
75879c316796
synchronized wait for Rfb initialization in change server.
oc
parents:
89
diff
changeset
|
415 |
| 28 | 416 } |