Send back the response in a DatagramPacket : DatagramSocket « Network Protocol « Java

1. Java
2. Network Protocol
3. DatagramSocket

Send back the response in a DatagramPacket

 


import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Date;

public class Main {
  final private static int DAYTIME_PORT = 13;

  public static void main(String args[]) throws IOException {
    DatagramSocket socket = new DatagramSocket(DAYTIME_PORT);
    while (true) {
      byte buffer[] = new byte[256];
      DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
      socket.receive(packet);
      String date = new Date().toString();
      buffer = date.getBytes();
      // Get response address/port for client from packet
      InetAddress address = packet.getAddress();
      int port = packet.getPort();
      packet = new DatagramPacket(buffer, buffer.length, address, port);
      socket.send(packet);
    }
  }
}

   
  

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