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1 package jp.ac.u_ryukyu.treevnc.server;
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11
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2
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3 import static org.junit.Assert.*;
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4
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5 import java.awt.Graphics;
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6 import java.awt.Image;
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7 import java.awt.image.BufferedImage;
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8 import java.io.BufferedOutputStream;
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9 import java.io.BufferedReader;
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10 import java.io.ByteArrayInputStream;
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11 import java.io.ByteArrayOutputStream;
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12 import java.io.IOException;
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13 import java.io.InputStream;
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14 import java.io.InputStreamReader;
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15 import java.net.BindException;
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16 import java.net.ServerSocket;
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17 import java.net.Socket;
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18 import java.nio.ByteBuffer;
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19 import java.util.Iterator;
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20 import java.util.LinkedList;
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21
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22 import javax.imageio.ImageIO;
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23
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24 import org.junit.Test;
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25
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26
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27 //import myVncProxy.MulticastQueue.Client;
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28
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29 import java.util.concurrent.ExecutorService;
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30 import java.util.concurrent.atomic.AtomicInteger;
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31 import java.util.zip.DataFormatException;
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32 import java.util.zip.Deflater;
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33 import java.util.zip.Inflater;
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34 import java.io.OutputStream;
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35
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12
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36 import jp.ac.u_ryukyu.treevnc.MulticastQueue;
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37
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11
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38 public class MyRfbProtoProxy {
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39 final static String versionMsg_3_855 = "RFB 003.855\n";
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40 /**
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41 * CheckMillis is one of new msgType for RFB 3.855.
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42 */
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43 final static byte SpeedCheckMillis = 4;
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44
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45 // Secyrity type of OS X
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46 final static int SecTypeReqAccess = 32;
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47
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48 // Supported authentication types
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49 final static int AuthAccess = 32;
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50
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51 private static final int INFLATE_BUFSIZE = 1024 * 100;
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52 boolean printStatusFlag = false;
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53 long startCheckTime;
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54 private int messageType;
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55 private int rectangles;
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56 private int rectX;
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57 private int rectY;
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58 private int rectW;
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59 private int rectH;
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60 private int encoding;
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61 private int zLen;
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62 private boolean clicomp = false;
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63
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64 private ServerSocket servSock;
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65 protected int acceptPort;
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66 // private byte initData[];
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67 byte initData[];
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68 private LinkedList<Socket> cliListTmp;
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69 private LinkedList<Socket> cliList;
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70 boolean createBimgFlag;
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71 boolean proxyFlag = true;
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72
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73 ExecutorService executor;
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74
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75 byte[] pngBytes;
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76
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77 // private MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new
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78 // MostRecentMultiCast<LinkedList<ByteBuffer>>(10);
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79 private MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new MulticastQueue<LinkedList<ByteBuffer>>();
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80 private int clients = 0;
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81 private Inflater inflater = new Inflater();
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82 private Deflater deflater = new Deflater();
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83 private CreateThread geth;
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84 // private Thread requestThread;
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85 private RequestScreenThread rThread;
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86 private Thread requestThread;
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87
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88 public MyRfbProtoProxy() throws IOException {
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89 }
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90
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91
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92 void initServSock(int port) throws IOException {
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93 servSock = new ServerSocket(port);
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94 acceptPort = port;
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95 }
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96
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97 /*
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98 * default port number is 5999.
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99 */
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100 public void selectPort(int p) {
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101 if (servSock != null)
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102 return;
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103 int port = p;
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104 while (true) {
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105 try {
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106 initServSock(port);
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107 break;
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108 } catch (BindException e) {
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109 port++;
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110 continue;
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111 } catch (IOException e) {
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112
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113 }
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114 }
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115 System.out.println("accept port = " + port);
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116 }
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117
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118 int getAcceptPort() {
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119 return acceptPort;
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120 }
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121
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122 void setSoTimeout(int num) throws IOException {
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123 servSock.setSoTimeout(num);
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124 }
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125
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126 public Socket accept() throws IOException {
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127 return servSock.accept();
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128 }
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129
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130 void addSock(Socket sock) {
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131 cliList.add(sock);
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132 }
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133
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134 void addSockTmp(Socket sock) {
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135 System.out.println("connected " + sock.getInetAddress());
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136 cliListTmp.add(sock);
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137 }
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138
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139 synchronized void changeStatusFlag() {
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140 printStatusFlag = true;
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141 }
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142
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143 void printMills() {
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144 if (printStatusFlag) {
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145
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146 changeStatusFlag();
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147 } else {
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148 changeStatusFlag();
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149 }
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150 }
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151
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152
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153 void requestThreadStart() {
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154 requestThread.start();
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155 }
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156
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157 public synchronized void requestThreadNotify() {
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158 rThread.reStart();
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159 }
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160
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161 /**
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162 * gzip byte arrays
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163 *
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164 * @param deflater
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165 * @param inputs
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166 * byte data[]
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167 * @param inputIndex
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168 * @param outputs
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169 * byte data[]
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170 * @return byte length in last byte array
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171 * @throws IOException
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172 */
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173 public int zip(Deflater deflater, LinkedList<ByteBuffer> inputs,
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174 int inputIndex, LinkedList<ByteBuffer> outputs) throws IOException {
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175 int len = 0;
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176 ByteBuffer c1 = ByteBuffer.allocate(INFLATE_BUFSIZE);
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177 while (inputIndex < inputs.size()) {
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178 ByteBuffer b1 = inputs.get(inputIndex++);
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179 deflater.setInput(b1.array(), b1.position(), b1.remaining());
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180 /**
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181 * If we finish() stream and reset() it, Deflater start new gzip
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182 * stream, this makes continuous zlib reader unhappy. if we remove
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183 * finish(), Deflater.deflate() never flushes its output. The
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184 * original zlib deflate has flush flag. I'm pretty sure this a kind
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185 * of bug of Java library.
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186 */
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187 if (inputIndex == inputs.size())
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188 deflater.finish();
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189 int len1 = 0;
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190 do {
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191 len1 = deflater.deflate(c1.array(), c1.position(),
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192 c1.remaining());
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193 if (len1 > 0) {
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194 len += len1;
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195 c1.position(c1.position() + len1);
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196 if (c1.remaining() == 0) {
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197 c1.flip();
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198 outputs.addLast(c1);
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199 c1 = ByteBuffer.allocate(INFLATE_BUFSIZE);
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200 }
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201 }
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202 } while (len1 > 0 || !deflater.needsInput()); // &&!deflater.finished());
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203 }
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204 if (c1.position() != 0) {
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205 c1.flip();
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206 outputs.addLast(c1);
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207 }
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208 deflater.reset();
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209 return len;
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210 }
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211
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212 /**
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213 * gunzip byte arrays
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214 *
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215 * @param inflater
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216 * @param inputs
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217 * byte data[]
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218 * @param outputs
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219 * byte data[]
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220 * @return number of total bytes
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221 * @throws IOException
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222 */
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223 public int unzip(Inflater inflater, LinkedList<ByteBuffer> inputs,
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224 int inputIndex, LinkedList<ByteBuffer> outputs, int bufSize)
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225 throws DataFormatException {
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226 int len = 0;
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227 ByteBuffer buf = ByteBuffer.allocate(bufSize);
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228 while (inputIndex < inputs.size()) {
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229 ByteBuffer input = inputs.get(inputIndex++);
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230 inflater.setInput(input.array(), input.position(), input.limit());
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231 // if (inputIndex==inputs.size()) if inflater/deflater has symmetry,
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232 // we need this
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233 // inflater.end(); but this won't work
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234 do {
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235 int len0 = inflater.inflate(buf.array(), buf.position(),
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236 buf.remaining());
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237 if (len0 > 0) {
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238 buf.position(buf.position() + len0);
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239 len += len0;
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240 if (buf.remaining() == 0) {
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241 buf.flip();
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242 outputs.addLast(buf);
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243 buf = ByteBuffer.allocate(bufSize);
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244 }
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245 }
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246 } while (!inflater.needsInput());
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247 }
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248 if (buf.position() != 0) {
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249 buf.flip();
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250 outputs.addLast(buf);
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251 }
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252 return len;
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253 }
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254
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255 float maxMag = 1;
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256
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257 /**
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258 * send data to clients
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259 *
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260 * @param dataLen
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261 * @throws IOException
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262 * @throws DataFormatException
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263 *
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264 * Zlibed packet is compressed in context dependent way, that
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265 * is, it have to send from the beginning. But this is
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266 * impossible. So we have to compress it again for each clients.
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267 * Separate deflater for each clients is necessary.
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268 *
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269 * Java's deflater does not support flush. This means to get the
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270 * result, we have to finish the compression. Reseting start new
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271 * compression, but it is not accepted well in zlib continuous
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272 * reading. So we need new Encoding ZRLEE which reset decoder
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273 * for each packet. ZRLEE can be invisible from user, but it
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274 * have to be implemented in the clients. ZRLEE compression is
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275 * not context dependent, so no recompression is necessary.
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276 */
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277
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278 void readSendData(int dataLen) throws IOException, DataFormatException {
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279 LinkedList<ByteBuffer> bufs = new LinkedList<ByteBuffer>();
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280 ByteBuffer header = ByteBuffer.allocate(16);
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281 readFully(header.array(), 0, 16);
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282 header.limit(16);
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283 if (header.get(0) == RfbProto.FramebufferUpdate) {
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284 int encoding = header.getInt(12);
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285 if (encoding == RfbProto.EncodingZRLE
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286 || encoding == RfbProto.EncodingZlib) { // ZRLEE is already
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287 // recompressed
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288 ByteBuffer len = ByteBuffer.allocate(4);
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289 readFully(len.array(), 0, 4);
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290 len.limit(4);
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291 ByteBuffer inputData = ByteBuffer.allocate(dataLen - 20);
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292
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293 readFully(inputData.array(), 0, inputData.capacity());
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294 // System.out.println(dataLen);
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295 inputData.limit(dataLen - 20);
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296
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297 LinkedList<ByteBuffer> inputs = new LinkedList<ByteBuffer>();
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298 inputs.add(inputData);
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299
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300 header.putInt(12, RfbProto.EncodingZRLEE); // means recompress
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301 // every time
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302 // using new Deflecter every time is incompatible with the
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303 // protocol, clients have to be modified.
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304 Deflater nDeflater = deflater; // new Deflater();
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305 LinkedList<ByteBuffer> out = new LinkedList<ByteBuffer>();
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306 unzip(inflater, inputs, 0, out, INFLATE_BUFSIZE);
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307 // dump32(inputs);
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308 int len2 = zip(nDeflater, out, 0, bufs);
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309 ByteBuffer blen = ByteBuffer.allocate(4);
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310 blen.putInt(len2);
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311 blen.flip();
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312 bufs.addFirst(blen);
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313
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314 bufs.addFirst(header);
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315 // if(dataLen<=64000)
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316 multicastqueue.put(bufs);
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317 // is.reset();
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318
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319 /*
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320 * System.out.println("ZRLE = "+dataLen);
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321 * System.out.println("ZRLEE = "+(len2+20)); float mag =
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322 * (float)dataLen / (float)(len2 + 20);
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323 * System.out.println("ZRLE / ZRLEE = "+ mag); if(mag > maxMag)
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324 * maxMag = mag; System.out.println("maxMag = "+maxMag);
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325 */
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326 return;
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327 }
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328 bufs.add(header);
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329 if (dataLen > 16) {
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330 ByteBuffer b = ByteBuffer.allocate(dataLen - 16);
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331 readFully(b.array(), 0, dataLen - 16);
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332 b.limit(dataLen - 16);
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333 bufs.add(b);
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334 }
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335 multicastqueue.put(bufs);
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336 // is.reset();
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337 return;
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338 }
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339 is.reset();
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340
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341 // It may be compressed. We can inflate here to avoid repeating clients
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342 // decompressing here,
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343 // but it may generate too many large data. It is better to do it in
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344 // each client.
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345 // But we have do inflation for all input data, so we have to do it
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346 // here.
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347 }
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348
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349 public void newClient(AcceptThread acceptThread, final Socket newCli,
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350 final OutputStream os, final InputStream is) throws IOException {
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351 // createBimgFlag = true;
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352 // rfb.addSockTmp(newCli);
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353 // addSock(newCli);
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354 final int myId = clients;
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355 final MulticastQueue.Client<LinkedList<ByteBuffer>> c = multicastqueue
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356 .newClient();
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357 final AtomicInteger writerRunning = new AtomicInteger();
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358 writerRunning.set(1);
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359 /**
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360 * Timeout thread. If a client is suspended, it has top of queue
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361 * indefinitely, which caused memory overflow. After the timeout, we
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362 * poll the queue and discard it. Start long wait if writer is running.
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363 */
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364 final Runnable timer = new Runnable() {
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365 public void run() {
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366 int count = 0;
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367 for (;;) {
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368 long timeout = 50000 / 8;
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369 try {
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370 synchronized (this) {
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371 int state, flag;
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372 writerRunning.set(0);
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373 wait(timeout);
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374 flag = 0;
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375 while ((state = writerRunning.get()) == 0) {
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376 c.poll(); // discard, should be timeout
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377 count++;
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378 if (flag == 0) {
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379 System.out.println("Discarding " + myId
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380 + " count=" + count);
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381 flag = 1;
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382 }
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383 wait(10); // if this is too short, writer cannot
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384 // take the poll, if this is too
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385 // long, memory will overflow...
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386 }
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387 if (flag == 1)
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388 System.out.println("Resuming " + myId
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389 + " count=" + count);
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390 if (state != 1) {
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391 System.out.println("Client died " + myId);
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392 break;
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393 }
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394 }
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395 } catch (InterruptedException e) {
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396 }
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397 }
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398 }
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399 };
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400 new Thread(timer).start();
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401 /**
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402 * discard all incoming from clients
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403 */
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404 final Runnable reader = new Runnable() {
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405 public void run() {
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406 byte b[] = new byte[4096];
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407 for (;;) {
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408 try {
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409 int c = is.read(b);
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410 if (c <= 0)
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411 throw new IOException();
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412 // System.out.println("client read "+c);
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413 } catch (IOException e) {
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414 try {
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415 writerRunning.set(2);
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416 os.close();
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417 is.close();
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418 } catch (IOException e1) {
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419 }
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420 return;
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421 }
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422 }
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423 }
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424 };
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425 /**
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426 * send packets to a client
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427 */
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428 Runnable sender = new Runnable() {
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429 public void run() {
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430 writerRunning.set(1);
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431 try {
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432 requestThreadNotify();
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433 // rThread.checkDelay();
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434
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435 /**
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436 * initial connection of RFB protocol
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437 */
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438 sendRfbVersion(os);
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439 // readVersionMsg(is);
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440 int rfbMinor = readVersionMsg(is, os);
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441 sendSecurityType(os);
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442 readSecType(is);
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443 sendSecResult(os);
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444 readClientInit(is);
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445 sendInitData(os);
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446 new Thread(reader).start(); // discard incoming packet here
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447 // after.
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448 // writeFramebufferUpdateRequest(0,0, framebufferWidth,
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449 // framebufferHeight, false );
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450 int i = 0;
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451 for (;;) {
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452 LinkedList<ByteBuffer> bufs = c.poll();
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453 int inputIndex = 0;
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454 ByteBuffer header = bufs.get(inputIndex);
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455 if (header == null)
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456 continue;
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457 else if (header.get(0) == RfbProto.CheckDelay) {
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458 writeToClient(os, bufs, inputIndex);
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459 continue;
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460 } else if (header.get(0) == RfbProto.FramebufferUpdate) {
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461 // System.out.println("client "+ myId);
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462 }
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463 /*
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464 if(i%20==0){
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465 sendDataCheckDelay();
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466 }
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467 i++;
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|
|
468 */
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469 writeToClient(os, bufs, inputIndex);
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470 writerRunning.set(1); // yes my client is awaking.
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471 }
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472 } catch (IOException e) {
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473 try {
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474 writerRunning.set(2);
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475 os.close();
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476 } catch (IOException e1) {
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477 }
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478 /* if socket closed cliList.remove(newCli); */
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479 }
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|
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480 }
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|
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481
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482 public void writeToClient(final OutputStream os,
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483 LinkedList<ByteBuffer> bufs, int inputIndex)
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484 throws IOException {
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485 while (inputIndex < bufs.size()) {
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486 ByteBuffer b = bufs.get(inputIndex++);
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487 os.write(b.array(), b.position(), b.limit());
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488 }
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489 os.flush();
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490 }
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491 };
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|
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492 clients++;
|
|
|
493 new Thread(sender).start();
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|
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494
|
|
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495 }
|
|
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496
|
|
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497 public void dump32(LinkedList<ByteBuffer> bufs) {
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|
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498 int len = 0;
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|
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499 for (ByteBuffer b : bufs)
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500 len += b.remaining();
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|
|
501 ByteBuffer top = bufs.getFirst();
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|
|
502 ByteBuffer end = bufs.getLast();
|
|
|
503 System.err.println("length: " + len);
|
|
|
504 System.err.print("head 0: ");
|
|
|
505 for (int i = 0; i < 16 && i < top.remaining(); i++) {
|
|
|
506 System.err.print(" " + top.get(i));
|
|
|
507 }
|
|
|
508 System.err.print("tail 0: ");
|
|
|
509 for (int i = 0; i < 16 && i < end.remaining(); i++) {
|
|
|
510 System.err.print(" " + end.get(i));
|
|
|
511 }
|
|
|
512 System.err.println();
|
|
|
513 }
|
|
|
514
|
|
|
515 @Test
|
|
|
516 public void test1() {
|
|
|
517 try {
|
|
|
518 LinkedList<ByteBuffer> in = new LinkedList<ByteBuffer>();
|
|
|
519 LinkedList<ByteBuffer> out = new LinkedList<ByteBuffer>();
|
|
|
520 LinkedList<ByteBuffer> out2 = new LinkedList<ByteBuffer>();
|
|
|
521 // if (false) {
|
|
|
522 // for(int i=0;i<10;i++) {
|
|
|
523 // in.add(ByteBuffer.wrap("test1".getBytes()));
|
|
|
524 // in.add(ByteBuffer.wrap("test2".getBytes()));
|
|
|
525 // in.add(ByteBuffer.wrap("test3".getBytes()));
|
|
|
526 // in.add(ByteBuffer.wrap("test44".getBytes()));
|
|
|
527 // }
|
|
|
528 // } else
|
|
|
529 {
|
|
|
530 String t = "";
|
|
|
531 for (int i = 0; i < 10; i++) {
|
|
|
532 t += "test1";
|
|
|
533 t += "test2";
|
|
|
534 t += "test3";
|
|
|
535 t += "test44";
|
|
|
536 }
|
|
|
537 in.add(ByteBuffer.wrap(t.getBytes()));
|
|
|
538 }
|
|
|
539
|
|
|
540 LinkedList<ByteBuffer> in1 = clone(in);
|
|
|
541
|
|
|
542 Deflater deflater = new Deflater();
|
|
|
543 zip(deflater, in, 0, out);
|
|
|
544 // LinkedList<ByteBuffer> out3 = clone(out); zipped result is depend
|
|
|
545 // on deflator's state
|
|
|
546 unzip(inflater, out, 0, out2, INFLATE_BUFSIZE);
|
|
|
547 // inflater.reset();
|
|
|
548 equalByteBuffers(in1, out2);
|
|
|
549 LinkedList<ByteBuffer> out4 = new LinkedList<ByteBuffer>();
|
|
|
550 deflater = new Deflater();
|
|
|
551 zip(deflater, out2, 0, out4);
|
|
|
552 LinkedList<ByteBuffer> out5 = new LinkedList<ByteBuffer>();
|
|
|
553 unzip(inflater, out4, 0, out5, INFLATE_BUFSIZE);
|
|
|
554 int len = equalByteBuffers(in1, out5);
|
|
|
555
|
|
|
556 System.out.println("Test Ok. " + len);
|
|
|
557 } catch (Exception e) {
|
|
|
558 assertEquals(0, 1);
|
|
|
559 }
|
|
|
560 }
|
|
|
561
|
|
|
562 private LinkedList<ByteBuffer> clone(LinkedList<ByteBuffer> in) {
|
|
|
563 LinkedList<ByteBuffer> copy = new LinkedList<ByteBuffer>();
|
|
|
564 for (ByteBuffer b : in) {
|
|
|
565 ByteBuffer c = b.duplicate();
|
|
|
566 copy.add(c);
|
|
|
567 }
|
|
|
568 return copy;
|
|
|
569 }
|
|
|
570
|
|
|
571 public int equalByteBuffers(LinkedList<ByteBuffer> in,
|
|
|
572 LinkedList<ByteBuffer> out2) {
|
|
|
573 int len = 0;
|
|
|
574 Iterable<Byte> i = byteBufferIterator(in);
|
|
|
575 Iterator<Byte> o = byteBufferIterator(out2).iterator();
|
|
|
576
|
|
|
577 for (int b : i) {
|
|
|
578 len++;
|
|
|
579 if (o.hasNext()) {
|
|
|
580 int c = o.next();
|
|
|
581 assertEquals(b, c);
|
|
|
582 } else
|
|
|
583 assertEquals(0, 1);
|
|
|
584 }
|
|
|
585 if (o.hasNext())
|
|
|
586 assertEquals(0, 1);
|
|
|
587 // System.out.println();
|
|
|
588 return len;
|
|
|
589 }
|
|
|
590
|
|
|
591 private Iterable<Byte> byteBufferIterator(final LinkedList<ByteBuffer> in) {
|
|
|
592 return new Iterable<Byte>() {
|
|
|
593 public Iterator<Byte> iterator() {
|
|
|
594 return new Iterator<Byte>() {
|
|
|
595 int bytes = 0;
|
|
|
596 int buffers = 0;
|
|
|
597
|
|
|
598 public boolean hasNext() {
|
|
|
599 for (;;) {
|
|
|
600 if (buffers >= in.size())
|
|
|
601 return false;
|
|
|
602 ByteBuffer b = in.get(buffers);
|
|
|
603 if (!(bytes < b.remaining())) {
|
|
|
604 buffers++;
|
|
|
605 bytes = 0;
|
|
|
606 } else
|
|
|
607 return true;
|
|
|
608 }
|
|
|
609 }
|
|
|
610
|
|
|
611 public Byte next() {
|
|
|
612 ByteBuffer bf = in.get(buffers);
|
|
|
613 byte b = bf.get(bytes++);
|
|
|
614 if (bf.remaining() <= bytes) {
|
|
|
615 buffers++;
|
|
|
616 bytes = 0;
|
|
|
617 }
|
|
|
618 // System.out.print(b);
|
|
|
619 return b;
|
|
|
620 }
|
|
|
621
|
|
|
622 public void remove() {
|
|
|
623 }
|
|
|
624 };
|
|
|
625 }
|
|
|
626 };
|
|
|
627 }
|
|
|
628
|
|
|
629 }
|
