Mercurial > hg > Applications > TreeVNC

annotate src/main/java/jp/ac/u_ryukyu/treevnc/FindRoot.java @ 514:887ebd993b3d

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separate rfb broadcast
author mir3636
date Thu, 21 Feb 2019 16:52:21 +0900
parents b97fdcd337fe
children 7071b01621c2
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1 package jp.ac.u_ryukyu.treevnc;
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3 import com.glavsoft.rfb.protocol.ProtocolContext.TreeCommand;
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4 import com.glavsoft.viewer.swing.ConnectionParams;
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6 import java.io.BufferedReader;
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7 import java.io.IOException;
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8 import java.net.DatagramPacket;
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9 import java.net.InetAddress;
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10 import java.net.MulticastSocket;
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11 import java.net.ServerSocket;
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12 import java.nio.ByteBuffer;
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13 import java.nio.ByteOrder;
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15 public class FindRoot {
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16 final int BUFSIZE = 1024;
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17 private MulticastSocket soc;
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18 private InetAddress mAddr;
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19 private ServerSocket server = null;
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20 private BufferedReader is;
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21 private int port;
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22 private boolean stopFlag = false;
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23 private String proxyAddr;
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24
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25 /**
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26 * To find vnc root, a client sends a multicast packet.
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27 * @param _port TreeVNC waiting port
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28 * @param createConnectionParam no use now
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29 */
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30 public FindRoot(int _port, CreateConnectionParam createConnectionParam) {
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31 port = _port;
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32 try {
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33 soc = TreeRootFinderListener.createMulticastSocket();
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34 mAddr = InetAddress.getByName(TreeRootFinderListener.McastAddr);
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35 System.out.println("FindRoot socket on " + TreeRootFinderListener.McastAddr + " " + mAddr + " port " + _port);
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36 } catch (IOException e) {
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37 System.out.println("cannot create FindRoot socket. " + e);
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38 }
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39 }
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41 /**
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42 * send find root message.
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43 *
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44 */
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45 public void findRoot() {
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46 ByteBuffer buf = ByteBuffer.allocate(12);
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47 buf.order(ByteOrder.BIG_ENDIAN);
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48 buf.put((byte) TreeCommand.FIND_ROOT.cmd);
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49 buf.put((byte) 0);
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50 buf.put((byte) 0);
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51 buf.put((byte) 0);
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52 buf.putInt(4); // length
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53 buf.putInt(port);
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54 buf.flip();
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57 try {
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58 DatagramPacket sendPacket = new DatagramPacket(buf.array(), buf.limit(), InetAddress.getByName(TreeRootFinderListener.Ipv6McastAddr), ConnectionParams.DEFAULT_VNC_ROOT_FINDER);
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59 soc.send(sendPacket);
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60 } catch (IOException e) {
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61 System.out.println("cannot send FindRoot packet.");
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62 e.printStackTrace();
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63 }
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65 try {
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66 DatagramPacket sendPacket1 = new DatagramPacket(buf.array(), buf.limit(), InetAddress.getByName(TreeRootFinderListener.Ipv4McastAddr), ConnectionParams.DEFAULT_VNC_ROOT_FINDER);
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67 soc.send(sendPacket1);
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68 } catch (IOException e) {
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69 System.out.println("cannot send FindRoot packet.");
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70 e.printStackTrace();
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71 }
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72 soc.close();
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73 }
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77 }