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24
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1 package myVncProxy;
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25
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2 import java.awt.Graphics;
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3 import java.awt.Image;
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4 import java.awt.image.BufferedImage;
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5 import java.io.BufferedOutputStream;
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6 import java.io.BufferedReader;
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7 import java.io.ByteArrayInputStream;
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8 import java.io.ByteArrayOutputStream;
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10
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9 import java.io.IOException;
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43
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10 import java.io.InputStream;
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11 import java.io.InputStreamReader;
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12 import java.net.BindException;
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13 import java.net.ServerSocket;
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14 import java.net.Socket;
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15 import java.util.LinkedList;
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16
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17 import javax.imageio.ImageIO;
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18
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40
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19 import java.util.concurrent.ExecutorService;
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20 import java.util.concurrent.Executors;
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21 import java.io.OutputStream;
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10
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22
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23 class MyRfbProto extends RfbProto {
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24
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43
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25 final static String versionMsg_3_998 = "RFB 003.998\n";
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26
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27
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18
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28 private int messageType;
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29 private int rectangles;
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23
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30 private int rectX;
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31 private int rectY;
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32 private int rectW;
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33 private int rectH;
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34 private int encoding;
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35 private int zLen;
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36 private int dataLen;
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37
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38 private ServerSocket servSock;
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39 private int acceptPort;
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40 private byte initData[];
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41 private LinkedList <Socket> cliListTmp;
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42 private LinkedList <Socket> cliList;
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43 private LinkedList <Thread> sendThreads;
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44 boolean createBimgFlag;
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45
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46 ExecutorService executor;
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47
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48
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49 byte[] pngBytes;
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50
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51 MyRfbProto(String h, int p, VncViewer v ) throws IOException {
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52 super(h, p, v);
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53 cliList = new LinkedList <Socket>();
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54 cliListTmp = new LinkedList <Socket>();
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55 createBimgFlag = false;
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56 sendThreads = new LinkedList <Thread>();
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40
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57 // executor = Executors.newCachedThreadPool();
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58 executor = Executors.newSingleThreadExecutor();
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59 }
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60
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61 MyRfbProto(String h, int p) throws IOException {
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62 super(h, p);
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63 cliList = new LinkedList <Socket>();
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64 cliListTmp = new LinkedList <Socket>();
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65 createBimgFlag = false;
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66 sendThreads = new LinkedList <Thread>();
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67 // executor = Executors.newCachedThreadPool();
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68 executor = Executors.newSingleThreadExecutor();
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13
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69 }
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70
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43
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71 // override
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72 void writeVersionMsg() throws IOException {
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73 clientMajor = 3;
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74 if (serverMinor >= 9) {
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75 clientMinor = 9;
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76 os.write(versionMsg_3_998.getBytes());
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77 } else if (serverMajor > 3 || serverMinor >= 8) {
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78 clientMinor = 8;
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79 os.write(versionMsg_3_8.getBytes());
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80 } else if (serverMinor >= 9) {
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81 clientMinor = 9;
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82 os.write(versionMsg_3_998.getBytes());
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83 } else if (serverMinor >= 7) {
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84 clientMinor = 7;
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85 os.write(versionMsg_3_7.getBytes());
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86 } else {
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87 clientMinor = 3;
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88 os.write(versionMsg_3_3.getBytes());
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89 }
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90 protocolTightVNC = false;
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91 initCapabilities();
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92 }
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93
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94
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95
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96 void initServSock(int port) throws IOException{
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97 servSock = new ServerSocket(port);
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98 acceptPort = port;
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99 }
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100 void selectPort(){
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101 int i = 5550;
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102 while(true){
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103 try{
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104 initServSock(i);
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105 break;
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106 }catch(BindException e){
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107 i++;
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108 continue;
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109 }catch(IOException e){
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110
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111 }
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112 }
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113 System.out.println("accept port = "+i);
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114 }
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115 int getAcceptPort(){
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116 return acceptPort;
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117 }
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118 void setSoTimeout(int num) throws IOException {
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119 servSock.setSoTimeout(num);
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120 }
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121
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122 Socket accept() throws IOException {
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123 return servSock.accept();
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124 }
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125
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126 void addSock(Socket sock){
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127 cliList.add(sock);
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128 }
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129 void addSockTmp(Socket sock){
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130 System.out.println("connected "+sock.getInetAddress());
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131 cliListTmp.add(sock);
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132 }
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133
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134 void mark(int len) throws IOException {
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135 is.mark(len);
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136 }
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137
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138 void reset() throws IOException {
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139 is.reset();
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140 }
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141
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142 boolean markSupported() {
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143 return is.markSupported();
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144 }
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145
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146 void readServerInit() throws IOException {
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147
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148 mark(255);
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149 skipBytes(20);
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150 int nlen = readU32();
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151 int blen = 20+4+nlen;
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152 initData = new byte[blen];
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153 reset();
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154
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155 mark(blen);
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156 readFully(initData);
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157 reset();
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158
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159 framebufferWidth = readU16();
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160 framebufferHeight = readU16();
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161 bitsPerPixel = readU8();
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162 depth = readU8();
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163 bigEndian = (readU8() != 0);
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164 trueColour = (readU8() != 0);
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165 redMax = readU16();
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166 greenMax = readU16();
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167 blueMax = readU16();
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168 redShift = readU8();
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169 greenShift = readU8();
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170 blueShift = readU8();
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171 byte[] pad = new byte[3];
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172 readFully(pad);
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173 int nameLength = readU32();
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174 byte[] name = new byte[nameLength];
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175 readFully(name);
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176 desktopName = new String(name);
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177
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178 // Read interaction capabilities (TightVNC protocol extensions)
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179 if (protocolTightVNC) {
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180 int nServerMessageTypes = readU16();
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181 int nClientMessageTypes = readU16();
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182 int nEncodingTypes = readU16();
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183 readU16();
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184 readCapabilityList(serverMsgCaps, nServerMessageTypes);
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185 readCapabilityList(clientMsgCaps, nClientMessageTypes);
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186 readCapabilityList(encodingCaps, nEncodingTypes);
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187 }
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188
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189 inNormalProtocol = true;
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190 }
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191
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43
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192 void sendRfbVersion(OutputStream os) throws IOException{
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193 os.write(versionMsg_3_998.getBytes());
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194 }
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195 void sendSecurityType(OutputStream os) throws IOException {
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196 // number-of-security-types
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197 os.write(1);
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198 // security-types
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199 // 1:None
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200 os.write(1);
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201 }
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202 void readClientInit(InputStream in) throws IOException {
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203 byte[] b = new byte[0];
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204 in.read(b);
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205 }
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206
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207 void sendInitData(OutputStream os) throws IOException{
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208 os.write(initData);
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209 }
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210
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211 void sendData(byte b[]){
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212 try{
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213 for(Socket cli : cliList){
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214 try{
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215 cli.getOutputStream().write(b, 0, b.length);
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216 }catch(IOException e){
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217 // if socket closed
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218 cliList.remove(cli);
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219 }
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220 }
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20
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221 // System.out.println("cliSize="+cliSize());
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222 }catch(Exception e){
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223 }
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224 }
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225
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226 void sendPngImage(){
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227 try{
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228 for(Socket cli : cliListTmp){
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229 try{
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230 sendPngData(cli);
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231 addSock(cli);
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232 }catch(IOException e){
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233 // if socket closed
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234 cliListTmp.remove(cli);
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235 }
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236 }
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237 // System.out.println("cliSize="+cliSize());
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238 }catch(Exception e){
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239 }
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240 cliListTmp.clear();
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241 }
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242
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243
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244
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245 boolean ready() throws IOException {
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246 BufferedReader br = new BufferedReader(new InputStreamReader(is));
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247 return br.ready();
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248 }
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249
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250 int cliSize(){
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251 return cliList.size();
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252 }
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253 void printNumBytesRead(){
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254 System.out.println("numBytesRead="+numBytesRead);
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255 }
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256 void bufResetSend(int size) throws IOException {
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257 reset();
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258 int len = size;
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259 if(available() < size )
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260 len = available();
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261 byte buffer[] = new byte[len];
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262 readFully(buffer);
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263 sendData(buffer);
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264 }
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265 void readSendData()throws IOException{
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266 byte buffer[] = new byte[dataLen];
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267 readFully(buffer);
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268 reset();
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269
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270 for(Socket cli : cliList){
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271 try{
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272 OutputStream out = cli.getOutputStream();
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273 executor.execute(new SendThread(out, buffer));
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274 }catch(IOException e){
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275 // if client socket closed
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276 cliListTmp.remove(cli);
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277 }catch(Exception e){
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278
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279 }
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280
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281 }
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282 }
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283 void regiFramebufferUpdate()throws IOException{
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284 mark(20);
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285 messageType = readU8();
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286 skipBytes(1);
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287 rectangles = readU16();
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288 rectX = readU16();
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289 rectY = readU16();
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290 rectW = readU16();
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291 rectH = readU16();
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292 encoding = readU32();
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293 if(encoding == 16)
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294 zLen = readU32();
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295 reset();
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296 }
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297 void checkAndMark() throws IOException{
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298 switch(encoding){
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299 case RfbProto.EncodingRaw:
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300 dataLen = rectW * rectH * 4 + 16;
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301 mark(dataLen);
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302 break;
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303 case RfbProto.EncodingZRLE:
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304 dataLen = zLen+20;
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305 mark(dataLen);
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306 break;
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307 default:
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308 mark(1000000);
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309 }
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310 }
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311 BufferedImage createBufferedImage(Image img){
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312 BufferedImage bimg = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB );
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313
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314 Graphics g = bimg.getGraphics();
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315 g.drawImage(img, 0, 0, null);
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316 g.dispose();
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317 return bimg;
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318 }
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319
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320 void createPngBytes(BufferedImage bimg)throws IOException {
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321 pngBytes = getImageBytes(bimg , "png");
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322 }
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323 byte[] getBytes(BufferedImage img)throws IOException {
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324 byte[] b = getImageBytes(img, "png");
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325 return b;
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326 }
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327
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328 byte[] getImageBytes(BufferedImage image, String imageFormat) throws IOException {
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329 ByteArrayOutputStream bos = new ByteArrayOutputStream();
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330 BufferedOutputStream os = new BufferedOutputStream(bos);
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331 image.flush();
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332 ImageIO.write(image, imageFormat, os);
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333 os.flush();
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334 os.close();
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335 return bos.toByteArray();
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336 }
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337
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338 void sendPngData(Socket sock)throws IOException{
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339 byte[] dataLength = castIntByte(pngBytes.length);
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340 sock.getOutputStream().write(dataLength);
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341 sock.getOutputStream().write(pngBytes);
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342 }
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26
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343 byte[] castIntByte(int len){
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344 byte[] b = new byte[4];
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345 b[0] = (byte)((len >>> 24 ) & 0xFF);
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346 b[1] = (byte)((len >>> 16 ) & 0xFF);
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347 b[2] = (byte)((len >>> 8 ) & 0xFF);
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348 b[3] = (byte)((len >>> 0 ) & 0xFF);
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349 return b;
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350 }
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25
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351
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352 BufferedImage createBimg()throws IOException{
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353 BufferedImage bimg = ImageIO.read(new ByteArrayInputStream(pngBytes));
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354 return bimg;
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355 }
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356 void readPngData()throws IOException{
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357 pngBytes = new byte[is.available()];
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358 readFully(pngBytes);
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359 }
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18
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360 void printFramebufferUpdate(){
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361
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362 System.out.println("messageType=" + messageType);
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363 System.out.println("rectangles="+rectangles);
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364 System.out.println("encoding=" + encoding);
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23
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365 switch(encoding){
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366 case RfbProto.EncodingRaw:
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367 System.out.println("rectW * rectH * 4 + 16 =" + rectW * rectH * 4 + 16);
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368 break;
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369 default:
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370 }
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18
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371 }
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10
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372 }
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43
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373
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374
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