73 lines
1.8 KiB
Java
73 lines
1.8 KiB
Java
/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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package commandterminal;
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import java.io.IOException;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetAddress;
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import java.net.SocketException;
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import java.net.UnknownHostException;
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import java.nio.ByteBuffer;
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/**
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*
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* @author lmascaro
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*/
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public class CommandTerminal {
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private final static int SGCA_MULTICAST_PORT = 4446;
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private final static String SCGA_MULTICAST_ADDRESS = "224.0.0.3";
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/**
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* @param args the command line arguments
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*/
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public static void main(String[] args){
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/*
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* Handshake
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*/
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try {
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DatagramSocket socket = new DatagramSocket();
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ByteBuffer buf = ByteBuffer.allocate(19);
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buf.clear();
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buf.put((byte)(0x01|0x02));
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DatagramPacket payload = new DatagramPacket(buf.array(),buf.array().length,InetAddress.getByName(SCGA_MULTICAST_ADDRESS),SGCA_MULTICAST_PORT);
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socket.send(payload);
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socket.receive(payload);
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buf = ByteBuffer.wrap(payload.getData());
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if(buf.get() == 3){
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System.out.println("--Connection request successful");
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byte address[] = new byte[9];
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buf = buf.get(address,0,9);
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String addressString = new String(address);
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InetAddress sgcaAddress = InetAddress.getByName(addressString);
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buf = buf.get(address,0,7);
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short shortVal = buf.getShort();
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int port = shortVal >= 0 ? shortVal : 0x10000 + shortVal;
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System.out.println("----Address : "+sgcaAddress.getHostAddress());
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System.out.println("----Port : "+port);
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}
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} catch ( IOException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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}
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