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