Mercurial > hg > Applications > TreeVNC
annotate src/main/java/jp/ac/u_ryukyu/treevnc/MyRfbProto.java @ 60:ac6f9e46566f
proxy mode ok.
| author | Taninari YU <you@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sat, 21 Dec 2013 18:46:54 +0900 |
| parents | 433c79184c05 |
| children | d9cf08c6415c |
| 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; | |
| 36 | 18 import com.glavsoft.viewer.Viewer; |
| 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; |
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34 |
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35 public MyRfbProto() { |
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36 rThread = new RequestScreenThread(this); |
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37 } |
| 28 | 38 |
| 39 | |
| 40 public void newClient(AcceptThread acceptThread, final Socket newCli, | |
| 41 final Writer os, final Reader is) throws IOException { | |
| 42 // createBimgFlag = true; | |
| 43 // rfb.addSockTmp(newCli); | |
| 44 // addSock(newCli); | |
| 45 final int myId = clients; | |
| 46 final MulticastQueue.Client<LinkedList<ByteBuffer>> c = multicastqueue.newClient(); | |
| 47 final AtomicInteger writerRunning = new AtomicInteger(); | |
| 48 writerRunning.set(1); | |
| 49 /** | |
| 50 * Timeout thread. If a client is suspended, it has top of queue | |
| 51 * indefinitely, which caused memory overflow. After the timeout, we | |
| 52 * poll the queue and discard it. Start long wait if writer is running. | |
| 53 */ | |
| 54 final Runnable timer = new Runnable() { | |
| 55 public void run() { | |
| 56 int count = 0; | |
| 57 for (;;) { | |
| 58 long timeout = 50000 / 8; | |
| 59 try { | |
| 60 synchronized (this) { | |
| 61 int state, flag; | |
| 62 writerRunning.set(0); | |
| 63 wait(timeout); | |
| 64 flag = 0; | |
| 65 while ((state = writerRunning.get()) == 0) { | |
| 66 c.poll(); // discard, should be timeout | |
| 67 count++; | |
| 68 if (flag == 0) { | |
| 69 System.out.println("Discarding " + myId | |
| 70 + " count=" + count); | |
| 71 flag = 1; | |
| 72 } | |
| 73 wait(10); // if this is too short, writer cannot | |
| 74 // take the poll, if this is too | |
| 75 // long, memory will overflow... | |
| 76 } | |
| 77 if (flag == 1) | |
| 78 System.out.println("Resuming " + myId | |
| 79 + " count=" + count); | |
| 80 if (state != 1) { | |
| 81 System.out.println("Client died " + myId); | |
| 82 break; | |
| 83 } | |
| 84 } | |
| 85 } catch (InterruptedException e) { | |
| 86 } | |
| 87 } | |
| 88 } | |
| 89 }; | |
| 90 new Thread(timer).start(); | |
| 91 /** | |
| 92 * discard all incoming from clients | |
| 93 */ | |
| 94 final Runnable reader = new Runnable() { | |
| 95 public void run() { | |
| 96 byte b[] = new byte[4096]; | |
| 97 for (;;) { | |
| 98 try { | |
| 99 int c = is.readByte(b); | |
| 100 if (c <= 0) | |
| 101 throw new IOException(); | |
| 102 // System.out.println("client read "+c); | |
| 103 } catch (IOException e) { | |
| 104 try { | |
| 105 writerRunning.set(2); | |
| 106 os.close(); | |
| 107 is.close(); | |
| 36 | 108 break; |
| 28 | 109 } catch (IOException e1) { |
| 110 } catch (TransportException e1) { | |
| 111 e1.printStackTrace(); | |
| 112 } | |
| 113 return; | |
| 114 } catch (TransportException e) { | |
| 115 e.printStackTrace(); | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 }; | |
| 120 /** | |
| 121 * send packets to a client | |
| 122 */ | |
| 123 Runnable sender = new Runnable() { | |
| 124 public void run() { | |
| 125 writerRunning.set(1); | |
| 126 try { | |
| 127 requestThreadNotify(); | |
| 128 // rThread.checkDelay(); | |
| 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); | |
| 141 new Thread(reader).start(); // discard incoming packet here | |
| 142 // after. | |
| 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) { | |
| 155 // System.out.println("client "+ myId); | |
| 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 } | |
| 163 } catch (IOException e) { | |
| 164 try { | |
| 165 writerRunning.set(2); | |
| 166 os.close(); | |
| 167 } catch (IOException e1) { | |
| 168 } | |
| 169 /* if socket closed cliList.remove(newCli); */ | |
| 170 } catch (TransportException e) { | |
| 171 e.printStackTrace(); | |
| 172 } | |
| 173 } | |
| 174 | |
| 175 public void writeToClient(final Writer os, | |
| 176 LinkedList<ByteBuffer> bufs, int inputIndex) | |
| 177 throws TransportException { | |
| 178 while (inputIndex < bufs.size()) { | |
| 179 ByteBuffer b = bufs.get(inputIndex++); | |
| 180 os.write(b.array(), b.position(), b.limit()); | |
| 181 } | |
| 182 os.flush(); | |
| 183 } | |
| 184 }; | |
| 185 clients++; | |
| 186 new Thread(sender).start(); | |
| 187 | |
| 188 } | |
| 189 | |
| 190 public synchronized void requestThreadNotify() { | |
| 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 { | |
| 230 Socket echoSocket; | |
| 231 echoSocket = new Socket(proxyAddr, 10001); | |
| 232 DataOutputStream os = new DataOutputStream(echoSocket.getOutputStream()); | |
| 233 os.writeBytes(echo.getMyAddress()+"\n"); | |
| 59 | 234 //os.writeBytes(String.valueOf(echo.client.getFrameWidth())+"\n"); temp comment out for rebuild |
| 235 //os.writeBytes(String.valueOf(echo.client.getFrameHeight())+"\n"); temp comment out for rebuild | |
| 45 | 236 System.out.println("---------push-------"); |
| 237 // os.writeBytes("1240\n"); | |
| 238 // os.writeBytes("880\n"); | |
| 239 os.close(); | |
| 240 } | |
| 28 | 241 |
| 242 private void sendProxyFlag(Writer writer) throws TransportException { | |
| 243 if (proxyFlag) | |
| 244 writer.writeInt(1); | |
| 245 else | |
| 246 writer.writeInt(0); | |
| 247 } | |
| 248 | |
| 249 private void sendPortNumber(Writer writer) throws TransportException { | |
| 250 byte[] b = new byte[4]; | |
| 251 //b = castIntByte(getHost.getPort()); | |
| 252 b = castIntByte(9999); | |
| 253 writer.write(b); | |
| 254 } | |
| 255 | |
| 256 private byte[] castIntByte(int len) { | |
| 257 byte[] b = new byte[4]; | |
| 258 b[0] = (byte) ((len >>> 24) & 0xFF); | |
| 259 b[1] = (byte) ((len >>> 16) & 0xFF); | |
| 260 b[2] = (byte) ((len >>> 8) & 0xFF); | |
| 261 b[3] = (byte) ((len >>> 0) & 0xFF); | |
| 262 return b; | |
| 263 } | |
| 264 | |
| 45 | 265 |
| 28 | 266 private void readSecType(Reader reader) throws TransportException { |
| 267 byte[] b = new byte[1]; | |
| 268 reader.read(b); | |
| 269 } | |
| 270 | |
| 271 private void sendSecurityType(Writer os) throws TransportException { | |
| 272 // number-of-security-types | |
| 273 os.writeInt(1); | |
| 274 // security-types | |
| 275 // 1:None | |
| 276 os.writeInt(1); | |
| 277 | |
| 278 /* | |
| 279 * os.write(4); os.write(30); os.write(31); os.write(32); os.write(35); | |
| 280 * os.flush(); | |
| 281 */ | |
| 282 } | |
| 283 | |
| 284 private void sendSecResult(Writer os) throws TransportException { | |
| 285 byte[] b = castIntByte(0); | |
| 286 os.write(b); | |
| 287 } | |
| 288 | |
| 289 private void readClientInit(Reader in) throws TransportException { | |
| 290 byte[] b = new byte[0]; | |
| 291 in.readBytes(b); | |
| 292 } | |
| 293 | |
| 294 private void sendInitData(Writer os) throws TransportException { | |
| 295 os.write(context.getInitData()); | |
| 296 } | |
| 297 | |
| 298 public void setProtocolContext(Protocol workingProtocol) { | |
| 299 context = workingProtocol; | |
| 300 } | |
| 29 | 301 |
| 302 | |
| 303 public void readSendData(int dataLen, Reader reader) throws TransportException { | |
| 304 | |
| 305 } | |
| 31 | 306 |
| 307 public Socket accept() throws IOException { | |
| 308 return null; | |
| 309 } | |
| 310 | |
| 38 | 311 public int selectPort(int port) { |
| 312 return port; | |
| 31 | 313 } |
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314 |
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315 |
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316 public void writeFramebufferUpdateRequest(int x, int y, int w, int h, |
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317 boolean incremental) throws TransportException { |
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318 byte[] b = new byte[10]; |
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319 |
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320 b[0] = (byte) FramebufferUpdateRequest; // 3 is FrameBufferUpdateRequest |
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321 b[1] = (byte) (incremental ? 1 : 0); |
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322 b[2] = (byte) ((x >> 8) & 0xff); |
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323 b[3] = (byte) (x & 0xff); |
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324 b[4] = (byte) ((y >> 8) & 0xff); |
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325 b[5] = (byte) (y & 0xff); |
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326 b[6] = (byte) ((w >> 8) & 0xff); |
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327 b[7] = (byte) (w & 0xff); |
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328 b[8] = (byte) ((h >> 8) & 0xff); |
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329 b[9] = (byte) (h & 0xff); |
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330 |
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331 // os.write(b); |
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332 } |
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333 |
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334 public void notProxy() { |
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335 proxyFlag = false; |
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336 } |
| 35 | 337 |
| 338 public void setEcho(EchoClient _echo) { | |
| 339 echo = _echo; | |
| 340 } | |
| 341 | |
| 36 | 342 public void setViewer(Viewer v) { |
| 343 echo.setViewer(v); | |
| 344 } | |
| 345 | |
| 35 | 346 public EchoClient getEcho() { |
| 347 return echo; | |
| 348 } | |
| 43 | 349 |
| 350 public void setTerminationType(boolean setType) { | |
| 351 /*nop*/ | |
| 352 } | |
| 353 | |
| 354 public boolean getTerminationType() { | |
| 355 /*nop*/ | |
| 356 return true; | |
| 357 } | |
| 45 | 358 |
| 359 public void setProxyAddr(String proxyAddr) { | |
| 360 this.proxyAddr = proxyAddr; | |
| 361 } | |
| 52 | 362 |
| 363 | |
| 364 public void close() { | |
| 365 //nothing | |
| 366 } | |
| 45 | 367 |
| 60 | 368 public int getAcceptPort() { |
| 369 return 0; | |
| 370 } | |
| 371 | |
| 28 | 372 } |