import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
//Name:Muhammad Ashiq Ali bin Abdul Hameed
//Group:SEP1
//IpAddress:
public class Rfc865UdpServer {
	public static void main(String[] argv) {
		 //
		 // 1. Open UDP socket at well-known port
		 //
		String datapacket,dataSentence;
		int port;
		InetAddress IPAddress=null;

		  DatagramSocket socket=null;
	 byte[] receiveData =new byte[65536];
		 byte[] sendData =new byte[65536];
		 while (true) {

		 try {
		 //
		 // 2. Listen for UDP request from client
		 //
		 socket = new DatagramSocket(17);//port 17 is used for qoute of the day protocol
		 DatagramPacket requestData = new DatagramPacket(receiveData,receiveData.length);
		 socket.receive(requestData);
		 dataSentence= new String(requestData.getData());//get the data
		 System.out.println("Received: "+ dataSentence);//print out the data
		 IPAddress=requestData.getAddress();//get the address
		  port = requestData.getPort();//get port number

		 //
		 // 3. Send UDP reply to client
		 //
		// datapacket=sentence.toUpperCase();//caps the received sentence
		  datapacket="Random Qoute of the day";
		 sendData=datapacket.getBytes();//convert it into bytes
		 DatagramPacket reply = new  DatagramPacket(sendData,sendData.length, IPAddress,port);
		 //Transmit the data back to sender stating that you have received the data
		 //Acknowledgement of the received Data
		 socket.send(reply);
		 } catch (Exception e) {
		 	System.out.println(e.getMessage());
		 	}
		 }
		 }

}