Mercurial > hg > Applications > TreeVNC
annotate src/main/java/jp/ac/u_ryukyu/treevnc/MyRfbProto.java @ 38:c2f0b6907448
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| author | one |
|---|---|
| date | Thu, 27 Sep 2012 19:32:25 +0900 |
| parents | b7d4d0349f99 |
| children | 6687aa9dd55e |
| 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; | |
| 6 import java.util.LinkedList; | |
| 7 import java.util.concurrent.atomic.AtomicInteger; | |
| 8 | |
| 35 | 9 import jp.ac.u_ryukyu.treevnc.client.EchoClient; |
| 28 | 10 import jp.ac.u_ryukyu.treevnc.server.RequestScreenThread; |
| 11 | |
| 12 import com.glavsoft.exceptions.TransportException; | |
| 13 import com.glavsoft.rfb.protocol.Protocol; | |
| 14 import com.glavsoft.rfb.protocol.ProtocolContext; | |
| 15 import com.glavsoft.transport.Reader; | |
| 16 import com.glavsoft.transport.Writer; | |
| 36 | 17 import com.glavsoft.viewer.Viewer; |
| 28 | 18 |
| 19 public class MyRfbProto { | |
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20 final static int FramebufferUpdateRequest = 3; |
| 28 | 21 final static int CheckDelay = 11; |
| 22 final static int FramebufferUpdate = 0; | |
| 23 private ProtocolContext context; | |
| 24 final static String versionMsg_3_855 = "RFB 003.855\n"; | |
| 25 private int clients; | |
| 32 | 26 protected MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new MulticastQueue<LinkedList<ByteBuffer>>(); |
| 28 | 27 private RequestScreenThread rThread; |
| 28 private boolean proxyFlag = true; | |
| 35 | 29 private EchoClient echo; |
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30 |
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31 public MyRfbProto() { |
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32 rThread = new RequestScreenThread(this); |
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33 } |
| 28 | 34 |
| 35 | |
| 36 public void newClient(AcceptThread acceptThread, final Socket newCli, | |
| 37 final Writer os, final Reader is) throws IOException { | |
| 38 // createBimgFlag = true; | |
| 39 // rfb.addSockTmp(newCli); | |
| 40 // addSock(newCli); | |
| 41 final int myId = clients; | |
| 42 final MulticastQueue.Client<LinkedList<ByteBuffer>> c = multicastqueue.newClient(); | |
| 43 final AtomicInteger writerRunning = new AtomicInteger(); | |
| 44 writerRunning.set(1); | |
| 45 /** | |
| 46 * Timeout thread. If a client is suspended, it has top of queue | |
| 47 * indefinitely, which caused memory overflow. After the timeout, we | |
| 48 * poll the queue and discard it. Start long wait if writer is running. | |
| 49 */ | |
| 50 final Runnable timer = new Runnable() { | |
| 51 public void run() { | |
| 52 int count = 0; | |
| 53 for (;;) { | |
| 54 long timeout = 50000 / 8; | |
| 55 try { | |
| 56 synchronized (this) { | |
| 57 int state, flag; | |
| 58 writerRunning.set(0); | |
| 59 wait(timeout); | |
| 60 flag = 0; | |
| 61 while ((state = writerRunning.get()) == 0) { | |
| 62 c.poll(); // discard, should be timeout | |
| 63 count++; | |
| 64 if (flag == 0) { | |
| 65 System.out.println("Discarding " + myId | |
| 66 + " count=" + count); | |
| 67 flag = 1; | |
| 68 } | |
| 69 wait(10); // if this is too short, writer cannot | |
| 70 // take the poll, if this is too | |
| 71 // long, memory will overflow... | |
| 72 } | |
| 73 if (flag == 1) | |
| 74 System.out.println("Resuming " + myId | |
| 75 + " count=" + count); | |
| 76 if (state != 1) { | |
| 77 System.out.println("Client died " + myId); | |
| 78 break; | |
| 79 } | |
| 80 } | |
| 81 } catch (InterruptedException e) { | |
| 82 } | |
| 83 } | |
| 84 } | |
| 85 }; | |
| 86 new Thread(timer).start(); | |
| 87 /** | |
| 88 * discard all incoming from clients | |
| 89 */ | |
| 90 final Runnable reader = new Runnable() { | |
| 91 public void run() { | |
| 92 byte b[] = new byte[4096]; | |
| 93 for (;;) { | |
| 94 try { | |
| 95 int c = is.readByte(b); | |
| 96 if (c <= 0) | |
| 97 throw new IOException(); | |
| 98 // System.out.println("client read "+c); | |
| 99 } catch (IOException e) { | |
| 100 try { | |
| 101 writerRunning.set(2); | |
| 102 os.close(); | |
| 103 is.close(); | |
| 36 | 104 break; |
| 28 | 105 } catch (IOException e1) { |
| 106 } catch (TransportException e1) { | |
| 107 e1.printStackTrace(); | |
| 108 } | |
| 109 return; | |
| 110 } catch (TransportException e) { | |
| 111 e.printStackTrace(); | |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 }; | |
| 116 /** | |
| 117 * send packets to a client | |
| 118 */ | |
| 119 Runnable sender = new Runnable() { | |
| 120 public void run() { | |
| 121 writerRunning.set(1); | |
| 122 try { | |
| 123 requestThreadNotify(); | |
| 124 // rThread.checkDelay(); | |
| 125 | |
| 126 /** | |
| 127 * initial connection of RFB protocol | |
| 128 */ | |
| 129 sendRfbVersion(os); | |
| 130 // readVersionMsg(is); | |
| 131 readVersionMsg(is, os); | |
| 132 sendSecurityType(os); | |
| 133 readSecType(is); | |
| 134 sendSecResult(os); | |
| 135 readClientInit(is); | |
| 136 sendInitData(os); | |
| 137 new Thread(reader).start(); // discard incoming packet here | |
| 138 // after. | |
| 139 // writeFramebufferUpdateRequest(0,0, framebufferWidth, | |
| 140 // framebufferHeight, false ); | |
| 141 for (;;) { | |
| 142 LinkedList<ByteBuffer> bufs = c.poll(); | |
| 143 int inputIndex = 0; | |
| 144 ByteBuffer header = bufs.get(inputIndex); | |
| 145 if (header == null) | |
| 146 continue; | |
| 147 else if (header.get(0) == CheckDelay) { | |
| 148 writeToClient(os, bufs, inputIndex); | |
| 149 continue; | |
| 150 } else if (header.get(0) == FramebufferUpdate) { | |
| 151 // System.out.println("client "+ myId); | |
| 152 } | |
| 153 /* | |
| 154 * if(i%20==0){ sendDataCheckDelay(); } i++; | |
| 155 */ | |
| 156 writeToClient(os, bufs, inputIndex); | |
| 157 writerRunning.set(1); // yes my client is awaking. | |
| 158 } | |
| 159 } catch (IOException e) { | |
| 160 try { | |
| 161 writerRunning.set(2); | |
| 162 os.close(); | |
| 163 } catch (IOException e1) { | |
| 164 } | |
| 165 /* if socket closed cliList.remove(newCli); */ | |
| 166 } catch (TransportException e) { | |
| 167 e.printStackTrace(); | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 public void writeToClient(final Writer os, | |
| 172 LinkedList<ByteBuffer> bufs, int inputIndex) | |
| 173 throws TransportException { | |
| 174 while (inputIndex < bufs.size()) { | |
| 175 ByteBuffer b = bufs.get(inputIndex++); | |
| 176 os.write(b.array(), b.position(), b.limit()); | |
| 177 } | |
| 178 os.flush(); | |
| 179 } | |
| 180 }; | |
| 181 clients++; | |
| 182 new Thread(sender).start(); | |
| 183 | |
| 184 } | |
| 185 | |
| 186 public synchronized void requestThreadNotify() { | |
| 187 rThread.reStart(); | |
| 188 } | |
| 189 | |
| 190 private void sendRfbVersion(Writer writer) throws IOException, TransportException { | |
| 191 // os.write(versionMsg_3_8.getBytes()); | |
| 192 writer.write(versionMsg_3_855.getBytes()); | |
| 193 } | |
| 194 | |
| 195 private int readVersionMsg(Reader reader, Writer writer) throws IOException, TransportException { | |
| 196 | |
| 197 byte[] b = new byte[12]; | |
| 198 | |
| 199 reader.readBytes(b); | |
| 200 | |
| 201 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ') | |
| 202 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9') | |
| 203 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.') | |
| 204 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9') | |
| 205 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) { | |
| 206 throw new IOException("this is not an RFB server"); | |
| 207 } | |
| 208 | |
| 209 int rfbMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0'); | |
| 210 int rfbMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0'); | |
| 211 | |
| 212 if (rfbMajor < 3) { | |
| 213 throw new IOException( | |
| 214 "RFB server does not support protocol version 3"); | |
| 215 } | |
| 216 | |
| 217 if (rfbMinor == 855) { | |
| 218 sendProxyFlag(writer); | |
| 219 if (proxyFlag) | |
| 220 sendPortNumber(writer); | |
| 221 } | |
| 222 return rfbMinor; | |
| 223 } | |
| 224 | |
| 225 private void sendProxyFlag(Writer writer) throws TransportException { | |
| 226 if (proxyFlag) | |
| 227 writer.writeInt(1); | |
| 228 else | |
| 229 writer.writeInt(0); | |
| 230 } | |
| 231 | |
| 232 private void sendPortNumber(Writer writer) throws TransportException { | |
| 233 byte[] b = new byte[4]; | |
| 234 //b = castIntByte(getHost.getPort()); | |
| 235 b = castIntByte(9999); | |
| 236 writer.write(b); | |
| 237 } | |
| 238 | |
| 239 private byte[] castIntByte(int len) { | |
| 240 byte[] b = new byte[4]; | |
| 241 b[0] = (byte) ((len >>> 24) & 0xFF); | |
| 242 b[1] = (byte) ((len >>> 16) & 0xFF); | |
| 243 b[2] = (byte) ((len >>> 8) & 0xFF); | |
| 244 b[3] = (byte) ((len >>> 0) & 0xFF); | |
| 245 return b; | |
| 246 } | |
| 247 | |
| 248 private void readSecType(Reader reader) throws TransportException { | |
| 249 byte[] b = new byte[1]; | |
| 250 reader.read(b); | |
| 251 } | |
| 252 | |
| 253 private void sendSecurityType(Writer os) throws TransportException { | |
| 254 // number-of-security-types | |
| 255 os.writeInt(1); | |
| 256 // security-types | |
| 257 // 1:None | |
| 258 os.writeInt(1); | |
| 259 | |
| 260 /* | |
| 261 * os.write(4); os.write(30); os.write(31); os.write(32); os.write(35); | |
| 262 * os.flush(); | |
| 263 */ | |
| 264 } | |
| 265 | |
| 266 private void sendSecResult(Writer os) throws TransportException { | |
| 267 byte[] b = castIntByte(0); | |
| 268 os.write(b); | |
| 269 } | |
| 270 | |
| 271 private void readClientInit(Reader in) throws TransportException { | |
| 272 byte[] b = new byte[0]; | |
| 273 in.readBytes(b); | |
| 274 } | |
| 275 | |
| 276 private void sendInitData(Writer os) throws TransportException { | |
| 277 os.write(context.getInitData()); | |
| 278 } | |
| 279 | |
| 280 public void setProtocolContext(Protocol workingProtocol) { | |
| 281 context = workingProtocol; | |
| 282 } | |
| 29 | 283 |
| 284 | |
| 285 public void readSendData(int dataLen, Reader reader) throws TransportException { | |
| 286 | |
| 287 } | |
| 31 | 288 |
| 289 public Socket accept() throws IOException { | |
| 290 return null; | |
| 291 } | |
| 292 | |
| 38 | 293 public int selectPort(int port) { |
| 294 return port; | |
| 31 | 295 } |
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296 |
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297 |
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298 public void writeFramebufferUpdateRequest(int x, int y, int w, int h, |
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299 boolean incremental) throws TransportException { |
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300 byte[] b = new byte[10]; |
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301 |
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302 b[0] = (byte) FramebufferUpdateRequest; // 3 is FrameBufferUpdateRequest |
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303 b[1] = (byte) (incremental ? 1 : 0); |
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304 b[2] = (byte) ((x >> 8) & 0xff); |
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305 b[3] = (byte) (x & 0xff); |
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306 b[4] = (byte) ((y >> 8) & 0xff); |
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307 b[5] = (byte) (y & 0xff); |
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308 b[6] = (byte) ((w >> 8) & 0xff); |
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309 b[7] = (byte) (w & 0xff); |
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310 b[8] = (byte) ((h >> 8) & 0xff); |
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311 b[9] = (byte) (h & 0xff); |
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312 |
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313 // os.write(b); |
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314 } |
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315 |
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316 public void notProxy() { |
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317 proxyFlag = false; |
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318 } |
| 35 | 319 |
| 320 | |
| 321 public void setEcho(EchoClient _echo) { | |
| 322 echo = _echo; | |
| 323 } | |
| 324 | |
| 36 | 325 public void setViewer(Viewer v) { |
| 326 echo.setViewer(v); | |
| 327 } | |
| 328 | |
| 35 | 329 public EchoClient getEcho() { |
| 330 return echo; | |
| 331 } | |
| 28 | 332 } |