Mercurial > hg > Applications > TreeVNC
annotate src/main/java/jp/ac/u_ryukyu/treevnc/MyRfbProto.java @ 52:986f16afb753
update before change host.
| author | one |
|---|---|
| date | Sat, 02 Nov 2013 17:55:10 +0900 |
| parents | 20326a4b9d88 |
| children | 0ae87c7e767c |
| 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; | |
| 25 final static String versionMsg_3_855 = "RFB 003.855\n"; | |
| 26 private int clients; | |
| 32 | 27 protected MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new MulticastQueue<LinkedList<ByteBuffer>>(); |
| 28 | 28 private RequestScreenThread rThread; |
| 29 private boolean proxyFlag = true; | |
| 35 | 30 private EchoClient echo; |
| 45 | 31 private String proxyAddr; |
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32 |
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33 public MyRfbProto() { |
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34 rThread = new RequestScreenThread(this); |
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35 } |
| 28 | 36 |
| 37 | |
| 38 public void newClient(AcceptThread acceptThread, final Socket newCli, | |
| 39 final Writer os, final Reader is) throws IOException { | |
| 40 // createBimgFlag = true; | |
| 41 // rfb.addSockTmp(newCli); | |
| 42 // addSock(newCli); | |
| 43 final int myId = clients; | |
| 44 final MulticastQueue.Client<LinkedList<ByteBuffer>> c = multicastqueue.newClient(); | |
| 45 final AtomicInteger writerRunning = new AtomicInteger(); | |
| 46 writerRunning.set(1); | |
| 47 /** | |
| 48 * Timeout thread. If a client is suspended, it has top of queue | |
| 49 * indefinitely, which caused memory overflow. After the timeout, we | |
| 50 * poll the queue and discard it. Start long wait if writer is running. | |
| 51 */ | |
| 52 final Runnable timer = new Runnable() { | |
| 53 public void run() { | |
| 54 int count = 0; | |
| 55 for (;;) { | |
| 56 long timeout = 50000 / 8; | |
| 57 try { | |
| 58 synchronized (this) { | |
| 59 int state, flag; | |
| 60 writerRunning.set(0); | |
| 61 wait(timeout); | |
| 62 flag = 0; | |
| 63 while ((state = writerRunning.get()) == 0) { | |
| 64 c.poll(); // discard, should be timeout | |
| 65 count++; | |
| 66 if (flag == 0) { | |
| 67 System.out.println("Discarding " + myId | |
| 68 + " count=" + count); | |
| 69 flag = 1; | |
| 70 } | |
| 71 wait(10); // if this is too short, writer cannot | |
| 72 // take the poll, if this is too | |
| 73 // long, memory will overflow... | |
| 74 } | |
| 75 if (flag == 1) | |
| 76 System.out.println("Resuming " + myId | |
| 77 + " count=" + count); | |
| 78 if (state != 1) { | |
| 79 System.out.println("Client died " + myId); | |
| 80 break; | |
| 81 } | |
| 82 } | |
| 83 } catch (InterruptedException e) { | |
| 84 } | |
| 85 } | |
| 86 } | |
| 87 }; | |
| 88 new Thread(timer).start(); | |
| 89 /** | |
| 90 * discard all incoming from clients | |
| 91 */ | |
| 92 final Runnable reader = new Runnable() { | |
| 93 public void run() { | |
| 94 byte b[] = new byte[4096]; | |
| 95 for (;;) { | |
| 96 try { | |
| 97 int c = is.readByte(b); | |
| 98 if (c <= 0) | |
| 99 throw new IOException(); | |
| 100 // System.out.println("client read "+c); | |
| 101 } catch (IOException e) { | |
| 102 try { | |
| 103 writerRunning.set(2); | |
| 104 os.close(); | |
| 105 is.close(); | |
| 36 | 106 break; |
| 28 | 107 } catch (IOException e1) { |
| 108 } catch (TransportException e1) { | |
| 109 e1.printStackTrace(); | |
| 110 } | |
| 111 return; | |
| 112 } catch (TransportException e) { | |
| 113 e.printStackTrace(); | |
| 114 } | |
| 115 } | |
| 116 } | |
| 117 }; | |
| 118 /** | |
| 119 * send packets to a client | |
| 120 */ | |
| 121 Runnable sender = new Runnable() { | |
| 122 public void run() { | |
| 123 writerRunning.set(1); | |
| 124 try { | |
| 125 requestThreadNotify(); | |
| 126 // rThread.checkDelay(); | |
| 127 | |
| 128 /** | |
| 129 * initial connection of RFB protocol | |
| 130 */ | |
| 131 sendRfbVersion(os); | |
| 132 // readVersionMsg(is); | |
| 133 readVersionMsg(is, os); | |
| 134 sendSecurityType(os); | |
| 135 readSecType(is); | |
| 136 sendSecResult(os); | |
| 137 readClientInit(is); | |
| 138 sendInitData(os); | |
| 139 new Thread(reader).start(); // discard incoming packet here | |
| 140 // after. | |
| 141 // writeFramebufferUpdateRequest(0,0, framebufferWidth, | |
| 142 // framebufferHeight, false ); | |
| 143 for (;;) { | |
| 144 LinkedList<ByteBuffer> bufs = c.poll(); | |
| 145 int inputIndex = 0; | |
| 146 ByteBuffer header = bufs.get(inputIndex); | |
| 147 if (header == null) | |
| 148 continue; | |
| 149 else if (header.get(0) == CheckDelay) { | |
| 150 writeToClient(os, bufs, inputIndex); | |
| 151 continue; | |
| 152 } else if (header.get(0) == FramebufferUpdate) { | |
| 153 // System.out.println("client "+ myId); | |
| 154 } | |
| 155 /* | |
| 156 * if(i%20==0){ sendDataCheckDelay(); } i++; | |
| 157 */ | |
| 158 writeToClient(os, bufs, inputIndex); | |
| 159 writerRunning.set(1); // yes my client is awaking. | |
| 160 } | |
| 161 } catch (IOException e) { | |
| 162 try { | |
| 163 writerRunning.set(2); | |
| 164 os.close(); | |
| 165 } catch (IOException e1) { | |
| 166 } | |
| 167 /* if socket closed cliList.remove(newCli); */ | |
| 168 } catch (TransportException e) { | |
| 169 e.printStackTrace(); | |
| 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(); | |
| 181 } | |
| 182 }; | |
| 183 clients++; | |
| 184 new Thread(sender).start(); | |
| 185 | |
| 186 } | |
| 187 | |
| 188 public synchronized void requestThreadNotify() { | |
| 189 rThread.reStart(); | |
| 190 } | |
| 191 | |
| 192 private void sendRfbVersion(Writer writer) throws IOException, TransportException { | |
| 193 // os.write(versionMsg_3_8.getBytes()); | |
| 194 writer.write(versionMsg_3_855.getBytes()); | |
| 195 } | |
| 196 | |
| 197 private int readVersionMsg(Reader reader, Writer writer) throws IOException, TransportException { | |
| 198 | |
| 199 byte[] b = new byte[12]; | |
| 200 | |
| 201 reader.readBytes(b); | |
| 202 | |
| 203 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ') | |
| 204 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9') | |
| 205 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.') | |
| 206 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9') | |
| 207 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) { | |
| 208 throw new IOException("this is not an RFB server"); | |
| 209 } | |
| 210 | |
| 211 int rfbMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0'); | |
| 212 int rfbMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0'); | |
| 213 | |
| 214 if (rfbMajor < 3) { | |
| 215 throw new IOException( | |
| 216 "RFB server does not support protocol version 3"); | |
| 217 } | |
| 218 | |
| 219 if (rfbMinor == 855) { | |
| 220 sendProxyFlag(writer); | |
| 221 if (proxyFlag) | |
| 222 sendPortNumber(writer); | |
| 223 } | |
| 224 return rfbMinor; | |
| 225 } | |
| 45 | 226 |
| 227 public void screenChangeRequest() throws IOException { | |
| 228 Socket echoSocket; | |
| 229 echoSocket = new Socket(proxyAddr, 10001); | |
| 230 DataOutputStream os = new DataOutputStream(echoSocket.getOutputStream()); | |
| 231 os.writeBytes(echo.getMyAddress()+"\n"); | |
| 232 System.out.println("---------push-------"); | |
| 233 // os.writeBytes("1240\n"); | |
| 234 // os.writeBytes("880\n"); | |
| 235 os.close(); | |
| 236 } | |
| 28 | 237 |
| 238 private void sendProxyFlag(Writer writer) throws TransportException { | |
| 239 if (proxyFlag) | |
| 240 writer.writeInt(1); | |
| 241 else | |
| 242 writer.writeInt(0); | |
| 243 } | |
| 244 | |
| 245 private void sendPortNumber(Writer writer) throws TransportException { | |
| 246 byte[] b = new byte[4]; | |
| 247 //b = castIntByte(getHost.getPort()); | |
| 248 b = castIntByte(9999); | |
| 249 writer.write(b); | |
| 250 } | |
| 251 | |
| 252 private byte[] castIntByte(int len) { | |
| 253 byte[] b = new byte[4]; | |
| 254 b[0] = (byte) ((len >>> 24) & 0xFF); | |
| 255 b[1] = (byte) ((len >>> 16) & 0xFF); | |
| 256 b[2] = (byte) ((len >>> 8) & 0xFF); | |
| 257 b[3] = (byte) ((len >>> 0) & 0xFF); | |
| 258 return b; | |
| 259 } | |
| 260 | |
| 45 | 261 |
| 28 | 262 private void readSecType(Reader reader) throws TransportException { |
| 263 byte[] b = new byte[1]; | |
| 264 reader.read(b); | |
| 265 } | |
| 266 | |
| 267 private void sendSecurityType(Writer os) throws TransportException { | |
| 268 // number-of-security-types | |
| 269 os.writeInt(1); | |
| 270 // security-types | |
| 271 // 1:None | |
| 272 os.writeInt(1); | |
| 273 | |
| 274 /* | |
| 275 * os.write(4); os.write(30); os.write(31); os.write(32); os.write(35); | |
| 276 * os.flush(); | |
| 277 */ | |
| 278 } | |
| 279 | |
| 280 private void sendSecResult(Writer os) throws TransportException { | |
| 281 byte[] b = castIntByte(0); | |
| 282 os.write(b); | |
| 283 } | |
| 284 | |
| 285 private void readClientInit(Reader in) throws TransportException { | |
| 286 byte[] b = new byte[0]; | |
| 287 in.readBytes(b); | |
| 288 } | |
| 289 | |
| 290 private void sendInitData(Writer os) throws TransportException { | |
| 291 os.write(context.getInitData()); | |
| 292 } | |
| 293 | |
| 294 public void setProtocolContext(Protocol workingProtocol) { | |
| 295 context = workingProtocol; | |
| 296 } | |
| 29 | 297 |
| 298 | |
| 299 public void readSendData(int dataLen, Reader reader) throws TransportException { | |
| 300 | |
| 301 } | |
| 31 | 302 |
| 303 public Socket accept() throws IOException { | |
| 304 return null; | |
| 305 } | |
| 306 | |
| 38 | 307 public int selectPort(int port) { |
| 308 return port; | |
| 31 | 309 } |
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310 |
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311 |
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312 public void writeFramebufferUpdateRequest(int x, int y, int w, int h, |
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313 boolean incremental) throws TransportException { |
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314 byte[] b = new byte[10]; |
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315 |
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316 b[0] = (byte) FramebufferUpdateRequest; // 3 is FrameBufferUpdateRequest |
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317 b[1] = (byte) (incremental ? 1 : 0); |
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318 b[2] = (byte) ((x >> 8) & 0xff); |
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319 b[3] = (byte) (x & 0xff); |
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320 b[4] = (byte) ((y >> 8) & 0xff); |
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321 b[5] = (byte) (y & 0xff); |
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322 b[6] = (byte) ((w >> 8) & 0xff); |
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323 b[7] = (byte) (w & 0xff); |
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324 b[8] = (byte) ((h >> 8) & 0xff); |
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325 b[9] = (byte) (h & 0xff); |
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326 |
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327 // os.write(b); |
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328 } |
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329 |
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330 public void notProxy() { |
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331 proxyFlag = false; |
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332 } |
| 35 | 333 |
| 334 public void setEcho(EchoClient _echo) { | |
| 335 echo = _echo; | |
| 336 } | |
| 337 | |
| 36 | 338 public void setViewer(Viewer v) { |
| 339 echo.setViewer(v); | |
| 340 } | |
| 341 | |
| 35 | 342 public EchoClient getEcho() { |
| 343 return echo; | |
| 344 } | |
| 43 | 345 |
| 346 public void setTerminationType(boolean setType) { | |
| 347 /*nop*/ | |
| 348 } | |
| 349 | |
| 350 public boolean getTerminationType() { | |
| 351 /*nop*/ | |
| 352 return true; | |
| 353 } | |
| 45 | 354 |
| 355 public void setProxyAddr(String proxyAddr) { | |
| 356 this.proxyAddr = proxyAddr; | |
| 357 } | |
| 52 | 358 |
| 359 | |
| 360 public void close() { | |
| 361 //nothing | |
| 362 } | |
| 45 | 363 |
| 28 | 364 } |