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1 package treeVnc;
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2
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3 import java.io.ByteArrayInputStream;
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4 import java.io.IOException;
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5 import java.net.DatagramPacket;
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6 import java.net.InetAddress;
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7 import java.net.MulticastSocket;
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8 import java.net.SocketAddress;
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9
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10 //import TextBoxProxy;
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11
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12 public class GetBroadCastProxy implements Runnable {
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13 static final String McastAddr = "224.0.0.1";
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14 static final int Port = 8183;
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15 static final int BufSize = 1024;
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16 private byte[] buf = new byte[BufSize];
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17 private byte[] resorve = new byte[BufSize];
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18 private ByteArrayInputStream inputStream;
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19 private boolean stopFlag = false;
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20 private VncProxyService vps;
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21 private BroadCastProxy bCast;
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22 private String address;
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23
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24 public GetBroadCastProxy(VncProxyService _vps){
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25 vps = _vps;
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26 bCast = new BroadCastProxy(vps.rfb.acceptPort+":"+vps.host+":"
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27 +vps.rfb.desktopName+":"+vps.acc.getMyAddress()+":");
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28 }
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29
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30 private synchronized void getData() {
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31 try {
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32 InetAddress mAddr = InetAddress.getByName(McastAddr);
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33 MulticastSocket soc = new MulticastSocket(Port);
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34 DatagramPacket recvPacket = new DatagramPacket(buf, BufSize);
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35 soc.joinGroup(mAddr);
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36 while (true) {
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37 soc.receive(recvPacket);
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38 address = getAddress(recvPacket.getSocketAddress());
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39 inputStream = new ByteArrayInputStream(recvPacket.getData());
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40 inputStream.read(resorve);
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41 if("who".equals(castString(resorve))){
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42 replyBroadCast();
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43 }
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44 }
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45 } catch (IOException e) {
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46 e.printStackTrace();
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47 }
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48 }
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49
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50 private void replyBroadCast() {
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51 Runnable sender = new Runnable() {
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52 public void run() {
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53 bCast.createSocket(address);
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54 }
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55 };
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56 new Thread(sender).start();
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57 }
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58
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59 private String getAddress(SocketAddress addr) {
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60 String str = addr.toString();
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61 str = str.substring(1,str.indexOf(":"));
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62 return str;
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63 }
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64 /*
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65 private int castBytoToInt(byte[] a) {
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66 int value = 0;
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67 ByteArrayInputStream bais = new ByteArrayInputStream(a);
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68 DataInputStream dis = new DataInputStream(bais);
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69 try {
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70 value = dis.readInt();
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71 } catch (IOException e) {
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72 }
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73 System.out.println(value);
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74 return value;
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75 }
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76 */
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77 private String castString(byte[] a) {
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78 String recover = new String(a);
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79 recover = recover.replace("¥n", "");
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80 recover = recover.trim();
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81 System.out.println(recover);
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82 return recover;
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83 }
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84
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85
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86 public void run() {
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87 getData();
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88 }
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89
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90 public void setStopFlag(boolean stopFlag) {
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91 this.stopFlag = stopFlag;
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92 }
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93
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94 public boolean isStopFlag() {
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95 return stopFlag;
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96 }
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97
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98 }
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