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12
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1 package jp.ac.u_ryukyu.treevnc.client;
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3
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2
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3 import java.io.DataInputStream;
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4 import java.io.IOException;
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5 import java.io.InputStream;
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6 import java.io.OutputStream;
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4
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7 import java.net.BindException;
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8 import java.net.ServerSocket;
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3
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9 import java.net.Socket;
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10 import java.nio.ByteBuffer;
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4
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11 import java.util.LinkedList;
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12 import java.util.concurrent.atomic.AtomicInteger;
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13 import java.util.zip.DataFormatException;
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14 import java.util.zip.Deflater;
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15 import java.util.zip.Inflater;
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3
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16
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12
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17 import jp.ac.u_ryukyu.treevnc.MulticastQueue;
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18
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3
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19
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20 import com.glavsoft.exceptions.TransportException;
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4
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21 import com.glavsoft.rfb.encoding.EncodingType;
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3
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22 import com.glavsoft.transport.Reader;
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23 import com.glavsoft.viewer.ContainerManager;
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24 import com.glavsoft.viewer.swing.ParametersHandler.ConnectionParams;
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25
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26 public class MyRfbProtoClient {
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4
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27 final static int FramebufferUpdate = 0;
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28 final static int CheckDelay = 11;
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29 final static String versionMsg_3_855 = "RFB 003.855\n";
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30 private static final int INFLATE_BUFSIZE = 1024*100;
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3
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31 private Reader reader;
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32 private EchoClient echoValue = new EchoClient();
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33 private String host,treenum,parent,pHost,leaderflag;
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4
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34 private int echoPort,port,acceptPort;
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3
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35 Socket clientSocket,sock;
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36 DataInputStream is;
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37 OutputStream os;
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38 private ContainerManager containerManager;
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4
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39 private ServerSocket servSock;
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40 private byte initData[];
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41 private int clients = 0;
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42 private MulticastQueue<LinkedList<ByteBuffer>> multicastqueue = new MulticastQueue<LinkedList<ByteBuffer>>();
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43 boolean proxyFlag = false;
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44 int serverMajor, serverMinor;
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45 int clientMajor, clientMinor;
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3
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46
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4
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47 private Inflater inflater = new Inflater();
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48 private Deflater deflater = new Deflater();
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3
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49
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50 public MyRfbProtoClient(Reader reader,String host,String port) {
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51 this.reader = reader;
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52 }
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53
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54 public void setParam(ConnectionParams connectionParams) {
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55 pHost = connectionParams.hostName;
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56 echoPort = connectionParams.portNumber;
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57 }
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58
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59 public boolean readProxyFlag() throws TransportException {
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60 int flag = reader.readUInt8();
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61 if(flag == 1)
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62 return true;
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63 else
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64 return false;
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65 }
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66
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67 public byte[] readEchoPort() throws Exception {
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68 byte[] b = new byte[4];
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69 reader.readBytes(b, 0, b.length);
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70 //readFully(b);
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71 return b;
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72 }
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73
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74 public void getParentName() {
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75 if (echoValue == null) {
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76
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77 if (clientSocket == null) {
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78
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79 // echo = new EchoClient(pHost, this);
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80 echoValue = new EchoClient(pHost, echoPort);
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81 echoValue.openport();
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82
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83 echoValue = echoValue.requestHostName("1");
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84 } else {
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85 echoValue = new EchoClient();
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86 echoValue = echoValue.Interruption(clientSocket);
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87 }
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88 }
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89 // proxyからの返信で接続先を決定する
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90 host = echoValue.responseLine;
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91 parent = echoValue.parent;
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92 if (echoValue.treenum != null) {
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93 treenum = echoValue.treenum;
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94 } else {
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95 treenum = echoValue.treenum;
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96 }
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97
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98 if (echoValue.leaderflag != null) {
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99 leaderflag = echoValue.leaderflag;
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100 } else {
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101 leaderflag = echoValue.leaderflag;
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102 }
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103 }
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104
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105 int castByteInt(byte[] b) {
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106 ByteBuffer bb = ByteBuffer.wrap(b);
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107 int value = bb.getInt();
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108 return value;
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109 }
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110
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111 Socket changeParent(String host, int port) throws IOException {
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112 sock = new Socket(host, port);
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113 return sock;
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114 }
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115
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4
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116 public Socket accept() throws IOException {
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117 return servSock.accept();
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118 }
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119
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120 void initServSock(int port) throws IOException {
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121 servSock = new ServerSocket(port);
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122 acceptPort = port;
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123 }
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124
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125 public void selectPort(int p) {
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126 int port = p;
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127 while (true) {
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128 try {
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129 initServSock(port);
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130 break;
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131 } catch (BindException e) {
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132 port++;
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133 continue;
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134 } catch (IOException e) {
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135
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136 }
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137 }
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138 System.out.println("accept port = " + port);
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139 }
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140
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141 public void newClient(AcceptThread acceptThread, final Socket newCli,
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142 final OutputStream os, final InputStream is) throws IOException {
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143 // createBimgFlag = true;
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144 // rfb.addSockTmp(newCli);
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145 // addSock(newCli);
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146 final int myId = clients;
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147 final MulticastQueue.Client <LinkedList<ByteBuffer>> c = multicastqueue.newClient();
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148 final AtomicInteger writerRunning = new AtomicInteger();
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149 writerRunning.set(1);
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150 /**
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151 * Timeout thread. If a client is suspended, it has top of queue indefinitely, which caused memory
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152 * overflow. After the timeout, we poll the queue and discard it. Start long wait if writer is running.
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153 */
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154 final Runnable timer = new Runnable() {
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155 public void run() {
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156 int count = 0;
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157 for(;;) {
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158 long timeout = 40000/8;
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159 try {
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160 synchronized(this) {
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161 int state,flag;
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162 writerRunning.set(0);
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163 wait(timeout);
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164 flag = 0;
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165 while((state=writerRunning.get())==0) {
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166 c.poll(); // discard, should be timeout
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167 count++;
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168 if (flag==0) {
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169 System.out.println("Discarding "+myId + " count="+ count); flag = 1;
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170 }
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171 wait(10); // if this is too short, writer cannot take the poll, if this is too long, memory will overflow...
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172 }
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173 if (flag==1) System.out.println("Resuming "+myId + " count="+count);
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174 if (state!=1) {
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175 System.out.println("Client died "+myId);
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176 break;
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177 }
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178 }
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179 } catch (InterruptedException e) {
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180 }
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181 }
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182 }
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183 };
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184 new Thread(timer).start();
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185 /**
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186 * discard all incoming from clients
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187 */
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188 final Runnable reader = new Runnable() {
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189 public void run() {
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190 byte b[] = new byte[4096];
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191 for(;;) {
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192 try {
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193 int c = is.read(b);
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194 if (c<=0) throw new IOException();
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195 // System.out.println("client read "+c);
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196 } catch (IOException e) {
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197 try {
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198 writerRunning.set(2);
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199 os.close();
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200 is.close();
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201 } catch (IOException e1) {
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202 }
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203 return;
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204 }
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205 }
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206 }
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207 };
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208 /**
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209 * send packets to a client
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210 */
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211 Runnable sender = new Runnable() {
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212 public void run() {
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213 writerRunning.set(1);
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214 try {
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215 /**
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216 * initial connection of RFB protocol
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217 */
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218 sendRfbVersion(os);
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219 // readVersionMsg(is);
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220 int rfbMinor = readVersionMsg(is,os);
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221 sendSecurityType(os);
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222 readSecType(is);
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223 sendSecResult(os);
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224 readClientInit(is);
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225 sendInitData(os);
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226 new Thread(reader).start(); // discard incoming packet here after.
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227 if(rfbMinor == 855){
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228 //checkDilay(os);
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229 // send jpeg data of full screen.
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230 // sendFullScreen("jpeg" ,os);
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231 } else {
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232 // send raw data of full screen.
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233
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234 }
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235 for (;;) {
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236 LinkedList<ByteBuffer> bufs = c.poll();
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237 int inputIndex = 0;
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238 ByteBuffer header = bufs.get(inputIndex);
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239 if (header==null) continue;
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240 if (header.get(0)==CheckDelay) {
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241 System.out.println("--------------------");
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242 //writeToClient(os, bufs, inputIndex);
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243 }
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244 if (header.get(0)==FramebufferUpdate) {
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245 // System.out.println("client "+ myId);
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246 }
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247 writeToClient(os, bufs, inputIndex);
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248 writerRunning.set(1); // yes my client is awaking.
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249 }
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250 } catch (IOException e) {
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251 try {
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252 writerRunning.set(2);
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253 os.close();
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254 } catch (IOException e1) {
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255 /* if socket closed cliList.remove(newCli); */
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256 }
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257 }
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258 }
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259
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260 public void writeToClient(final OutputStream os,
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261 LinkedList<ByteBuffer> bufs, int inputIndex)
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262 throws IOException {
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263 while(inputIndex < bufs.size()) {
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264 ByteBuffer b = bufs.get(inputIndex++);
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265 os.write(b.array(), b.position(), b.limit());
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266 }
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267 os.flush();
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268 }
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269 };
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270 clients++;
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271 new Thread(sender).start();
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272
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273 }
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274
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275 void sendRfbVersion(OutputStream os) throws IOException {
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276 os.write(versionMsg_3_855.getBytes());
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277 // os.write(versionMsg_3_8.getBytes());
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278 }
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279 int readVersionMsg(InputStream is, OutputStream os) throws IOException {
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280
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281 byte[] b = new byte[12];
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282
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283 is.read(b);
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284
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285 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ')
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286 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9')
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287 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.')
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288 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9')
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289 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) {
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290 throw new IOException("Host " + host + " port " + port
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291 + " is not an RFB server");
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292 }
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293
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294 int rfbMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0');
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295 int rfbMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0');
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296
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297 if (rfbMajor < 3) {
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298 throw new IOException(
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299 "RFB server does not support protocol version 3");
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300 }
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301
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302 if (rfbMinor == 855) {
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303 sendProxyFlag(os);
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304 // if(proxyFlag)sendPortNumber(os);
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305 }
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306 return rfbMinor;
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307
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308 } void readVersionMsg(InputStream is) throws IOException {
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309
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310 byte[] b = new byte[12];
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311
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312 is.read(b);
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313
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314 if ((b[0] != 'R') || (b[1] != 'F') || (b[2] != 'B') || (b[3] != ' ')
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315 || (b[4] < '0') || (b[4] > '9') || (b[5] < '0') || (b[5] > '9')
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316 || (b[6] < '0') || (b[6] > '9') || (b[7] != '.')
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317 || (b[8] < '0') || (b[8] > '9') || (b[9] < '0') || (b[9] > '9')
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318 || (b[10] < '0') || (b[10] > '9') || (b[11] != '\n')) {
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319 throw new IOException("Host " + host + " port " + port
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320 + " is not an RFB server");
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321 }
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322
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323 serverMajor = (b[4] - '0') * 100 + (b[5] - '0') * 10 + (b[6] - '0');
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324 serverMinor = (b[8] - '0') * 100 + (b[9] - '0') * 10 + (b[10] - '0');
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325
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326 if (serverMajor < 3) {
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327 throw new IOException(
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328 "RFB server does not support protocol version 3");
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329 }
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330
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331 }
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332
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333 void sendSecurityType(OutputStream os) throws IOException {
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334 // number-of-security-types
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335 os.write(1);
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336 // security-types
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337 // 1:None
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338 os.write(1);
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339 }
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340 void readSecType(InputStream is) throws IOException {
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341 byte[] b = new byte[1];
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342 is.read(b);
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343
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344 }
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345
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346 void sendSecResult(OutputStream os) throws IOException {
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347 byte[] b = castIntByte(0);
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348 os.write(b);
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349 }
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350
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351 void readClientInit(InputStream in) throws IOException {
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352 byte[] b = new byte[0];
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353 in.read(b);
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354 }
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355
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356 void sendInitData(OutputStream os) throws IOException {
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357 os.write(initData);
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358 }
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359
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360 void sendProxyFlag(OutputStream os) throws IOException {
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361 if(proxyFlag) os.write(1);
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362 else os.write(0);
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363 }
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364
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365 byte[] castIntByte(int len) {
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366 byte[] b = new byte[4];
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367 b[0] = (byte) ((len >>> 24) & 0xFF);
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368 b[1] = (byte) ((len >>> 16) & 0xFF);
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369 b[2] = (byte) ((len >>> 8) & 0xFF);
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370 b[3] = (byte) ((len >>> 0) & 0xFF);
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371 return b;
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372 }
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373
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374 /**
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375 * gzip byte arrays
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376 * @param deflater
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377 * @param inputs
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378 * byte data[]
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379 * @param inputIndex
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380 * @param outputs
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381 * byte data[]
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382 * @return byte length in last byte array
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383 * @throws IOException
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384 */
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385 public int zip(Deflater deflater,LinkedList<ByteBuffer> inputs, int inputIndex, LinkedList<ByteBuffer> outputs) throws IOException {
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386 int len = 0;
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387 ByteBuffer c1= ByteBuffer.allocate(INFLATE_BUFSIZE);
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388 while(inputIndex < inputs.size() ) {
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389 ByteBuffer b1 = inputs.get(inputIndex++);
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390 deflater.setInput(b1.array(),b1.position(),b1.remaining());
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391 /**
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392 * If we finish() stream and reset() it, Deflater start new gzip stream, this makes continuous zlib reader unhappy.
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393 * if we remove finish(), Deflater.deflate() never flushes its output. The original zlib deflate has flush flag. I'm pretty
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394 * sure this a kind of bug of Java library.
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395 */
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396 if (inputIndex==inputs.size())
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397 deflater.finish();
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398 int len1 = 0;
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399 do {
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400 len1 = deflater.deflate(c1.array(),c1.position(),c1.remaining());
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401 if (len1>0) {
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402 len += len1;
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403 c1.position(c1.position()+len1);
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404 if (c1.remaining()==0) {
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405 c1.flip(); outputs.addLast(c1);
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406 c1 = ByteBuffer.allocate(INFLATE_BUFSIZE);
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407 }
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408 }
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409 } while (len1 >0 || !deflater.needsInput()); // &&!deflater.finished());
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410 }
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411 if (c1.position()!=0) {
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412 c1.flip(); outputs.addLast(c1);
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413 }
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414 deflater.reset();
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415 return len;
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416 }
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417
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418
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419 /**
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420 * gunzip byte arrays
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421 * @param inflater
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422 * @param inputs
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423 * byte data[]
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424 * @param outputs
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425 * byte data[]
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426 *@return number of total bytes
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427 * @throws IOException
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428 */
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429 public int unzip(Inflater inflater, LinkedList<ByteBuffer> inputs,
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430 int inputIndex, LinkedList<ByteBuffer> outputs, int bufSize)
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431 throws DataFormatException {
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432 int len = 0;
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433 ByteBuffer buf = ByteBuffer.allocate(bufSize);
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434 while (inputIndex < inputs.size()) {
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435 ByteBuffer input = inputs.get(inputIndex++);
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436 inflater.setInput(input.array(), input.position(), input.limit());
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437 // if (inputIndex==inputs.size()) if inflater/deflater has symmetry,
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438 // we need this
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439 // inflater.end(); but this won't work
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440 do {
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441 int len0 = inflater.inflate(buf.array(), buf.position(),
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442 buf.remaining());
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443 if (len0 > 0) {
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444 buf.position(buf.position() + len0);
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445 len += len0;
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446 if (buf.remaining() == 0) {
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447 buf.flip();
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448 outputs.addLast(buf);
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449 buf = ByteBuffer.allocate(bufSize);
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450 }
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451 }
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452 } while (!inflater.needsInput());
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453 }
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454 if (buf.position() != 0) {
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455 buf.flip();
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456 outputs.addLast(buf);
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457 }
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458 return len;
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459 }
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460
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461 void readSendData(int dataLen,Reader reader) throws IOException, DataFormatException, TransportException {
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462 LinkedList<ByteBuffer>bufs = new LinkedList<ByteBuffer>();
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463 ByteBuffer header = ByteBuffer.allocate(16);
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464 reader.readBytes(header.array(),0,16);
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465 header.limit(16);
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466 if (header.get(0)==FramebufferUpdate) {
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467 int encoding = header.getInt(12);
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468 if (encoding==EncodingType.ZRLE.getId()||encoding==EncodingType.ZLIB.getId()) { // ZRLEE is already recompressed
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469 ByteBuffer len = ByteBuffer.allocate(4);
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470 reader.readBytes(len.array(),0,4); len.limit(4);
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471 ByteBuffer inputData = ByteBuffer.allocate(dataLen-20);
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472 reader.readBytes(inputData.array(),0,inputData.capacity()); inputData.limit(dataLen-20);
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473 LinkedList<ByteBuffer>inputs = new LinkedList<ByteBuffer>();
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474 inputs.add(inputData);
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475
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|
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476 header.putInt(12, EncodingType.ZRLEE.getId()); // means recompress every time
|
|
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477 // using new Deflecter every time is incompatible with the protocol, clients have to be modified.
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|
|
478 Deflater nDeflater = deflater; // new Deflater();
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|
|
479 LinkedList<ByteBuffer> out = new LinkedList<ByteBuffer>();
|
|
|
480 unzip(inflater, inputs, 0 , out, INFLATE_BUFSIZE);
|
|
|
481 // dump32(inputs);
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|
|
482 int len2 = zip(nDeflater, out, 0, bufs);
|
|
|
483 ByteBuffer blen = ByteBuffer.allocate(4); blen.putInt(len2); blen.flip();
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|
|
484 bufs.addFirst(blen);
|
|
|
485
|
|
|
486 bufs.addFirst(header);
|
|
|
487 multicastqueue.put(bufs);
|
|
|
488 is.reset();
|
|
|
489 return ;
|
|
|
490 }
|
|
|
491 }
|
|
|
492 bufs.add(header);
|
|
|
493 if (dataLen>16) {
|
|
|
494 ByteBuffer b = ByteBuffer.allocate(dataLen-16);
|
|
|
495 reader.readBytes(b.array(),0,dataLen-16); b.limit(dataLen-16);
|
|
|
496 bufs.add(b);
|
|
|
497 }
|
|
|
498 multicastqueue.put(bufs);
|
|
|
499 is.reset();
|
|
|
500
|
|
|
501 // It may be compressed. We can inflate here to avoid repeating clients decompressing here,
|
|
|
502 // but it may generate too many large data. It is better to do it in each client.
|
|
|
503 // But we have do inflation for all input data, so we have to do it here.
|
|
|
504 }
|
|
|
505
|
|
|
506
|
|
|
507
|
|
3
|
508 }
|
