title: How to find the MAC address of Wi-Fi devices connected to socket
body: <p>I am developing a web application which acts as a server. In this application I have implimented ServerSocket for two way communication between server application and wi-fi device which acts as client. I am not connecting to my server directly, I am connecting to my router which port forwards to my system and two way communication is successful. All I want now is to find the MAC address of Wi-fi device which is connected.I have done some research and tried to get the MAC address but failed.Can anyone help me on this.Below is the part of my code.</p>
  
  <pre><code>public class ScheduleJob extends ServletApp implements Job{
  
  private int port = 1717;
  public static String number;
  String ReceivedData = "";
  
  public void execute(JobExecutionContext context)throws JobExecutionException {
      System.out.println("Starting ... ");
  
      ServerSocket Sersocket = null;
      System.out.println("Starting the socket server at port:" +port);
      boolean listeningSocket = true;
      try {
          Sersocket = new ServerSocket(port);
          System.out.println("Waiting for clients...");
      } catch (IOException e) {
          System.err.println("Could not listen on port: 1717");
      }
      try {
  
          while (listeningSocket) {
              Socket scokt = Sersocket.accept();
               InetAddress MachineAdd = scokt.getInetAddress();
              System.out.println("Response-----:" +MachineAdd);
              InetAddress ip = InetAddress.getLocalHost();
              System.out.println("current ip : "+ip);
              NetworkInterface network = NetworkInterface.getByInetAddress(ip);
  
              byte[] mac = network.getHardwareAddress();
              System.out.print("Current MAC address : ");
  
              StringBuilder sb = new StringBuilder();
              for (int i = 0; i &lt; mac.length; i++) {
                  sb.append(String.format("%02X%s", mac[i], (i &lt; mac.length - 1) ? "-" : ""));        
              }
              System.out.println(sb.toString());
  </code></pre>