Merge branch 'master' of https://git.xdrm.io/xdrm-brackets/sysdis-project
This commit is contained in:
xdrm-brackets
commit
e270e47bc1
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@ -6,19 +6,13 @@
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package commandterminal;
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import DatagramSocket.AsynchronousDatagramSocket;
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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.InterfaceAddress;
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import java.net.NetworkInterface;
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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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import java.util.Enumeration;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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/**
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*
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@ -26,96 +20,52 @@ import java.util.logging.Logger;
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*/
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public class CommandTerminal {
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private final static int SGCA_BROADCAST_PORT = 9999;
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private final static int MAX_MESSAGE_SIZE = 300;
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private static AsynchronousDatagramSocket socket;
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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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//the following code go through every interfaces to get broadcasts addresses in order to contact the sgca
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HashSet<InetAddress> listOfBroadcasts = new HashSet<InetAddress>();
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Enumeration list;
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try {
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list = NetworkInterface.getNetworkInterfaces();
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while(list.hasMoreElements()) {
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NetworkInterface iface = (NetworkInterface) list.nextElement();
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if(iface == null) continue;
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//if the interface is not loopback
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if(!iface.isLoopback() && iface.isUp()) {
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Iterator it = iface.getInterfaceAddresses().iterator();
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while (it.hasNext()) {
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InterfaceAddress address = (InterfaceAddress) it.next();
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if(address == null) continue;
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InetAddress broadcast = address.getBroadcast();
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if(broadcast != null)
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{
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//we found it !
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listOfBroadcasts.add(broadcast);
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}
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}
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}
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}
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} catch (SocketException ex) {
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System.err.println("Error while getting network interfaces");
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return;
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}
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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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Integer sgcaPort;
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InetAddress sgcaAddress;
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DatagramPacket packet;
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try {
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//try to send a request to all the broadcasts (usually there is only one) and wait for the response of the sgca
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DatagramSocket broadcastSocket = new DatagramSocket();
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byte[] data;
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for(InetAddress adr : listOfBroadcasts){
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data = new byte[1];
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Integer clientType = 1;
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data[0] = clientType.byteValue();
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packet = new DatagramPacket(data,data.length,adr,SGCA_BROADCAST_PORT);
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broadcastSocket.send(packet);
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}
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data = new byte[1];
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packet = new DatagramPacket(data,data.length);
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broadcastSocket.receive(packet);
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sgcaAddress = packet.getAddress();
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Byte b = new Byte(packet.getData()[0]);
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sgcaPort = b.intValue();
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} catch (Exception ex) {
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Logger.getLogger(CommandTerminal.class.getName()).log(Level.SEVERE, null, ex);
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return;
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}
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//from now we assume that the network discovery part went well and we have the port/address of the sgca
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//send a ISALIVE to ensure the sgca is ready to receive commands
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DatagramSocket comSock;
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ByteBuffer buf = ByteBuffer.allocate(1);
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try {
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comSock = new DatagramSocket(sgcaPort);
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buf.putInt(OpCode.ISALIVE.ordinal());
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packet = new DatagramPacket(buf.array(),buf.arrayOffset(),sgcaAddress,sgcaPort);
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comSock.send(packet);
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//receive response
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comSock.receive(packet);
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Byte response = new Byte(packet.getData()[0]);
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OpCode success = OpCode.values()[response.intValue()];
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if(success != OpCode.SUCCESS){
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System.out.println("SGCA Not ready, exiting");
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return;
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}
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} catch (Exception ex) {
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Logger.getLogger(CommandTerminal.class.getName()).log(Level.SEVERE, null, ex);
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}
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//now the sgca is connected and ready, let's start the real work
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}
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