add mac tcp and udp receiver (as backup)

osx_as_ap/TCPReceiver.java

@@ -0,0 +1,62 @@
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.nio.ByteBuffer;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+
+
+public class TCPReceiver  {
+  ServerSocketChannel listener = null;
+  protected void mySetup()
+  {
+    InetSocketAddress listenAddr =  new InetSocketAddress(4444);
+
+    try {
+      listener = ServerSocketChannel.open();
+      ServerSocket ss = listener.socket();
+      ss.setReuseAddress(true);
+      ss.bind(listenAddr);
+      System.out.println("Listening on port : "+ listenAddr.toString());
+    } catch (IOException e) {
+      System.out.println("Failed to bind, is port : "+ listenAddr.toString()
+          + " already in use ? Error Msg : "+e.getMessage());
+      e.printStackTrace();
+    }
+
+  }
+
+  public static void main(String[] args)
+  {
+    TCPReceiver dns = new TCPReceiver();
+    dns.mySetup();
+    dns.readData();
+  }
+
+  private void readData()  {
+      ByteBuffer dst = ByteBuffer.allocate(4096);
+      try {
+          while(true) {
+              SocketChannel conn = listener.accept();
+              System.out.println("Accepted : "+conn);
+              conn.configureBlocking(true);
+              int nread = 0;
+              int data_recv = 0;
+              while (nread != -1)  {
+                  try {
+                      nread = conn.read(dst);
+                      data_recv += nread;
+                      // System.out.println("data: " +nread);
+                  } catch (IOException e) {
+                      e.printStackTrace();
+                      nread = -1;
+                  }
+                  dst.rewind();
+              }
+              System.out.println("Received data: "+data_recv);
+          }
+      } catch (IOException e) {
+          e.printStackTrace();
+      }
+  }
+}

osx_as_ap/UDPReceiver.java

@@ -0,0 +1,25 @@
+import java.io.*;
+import java.net.*;
+
+
+public class UDPReceiver {    
+    public static void main(String args[]) throws Exception       
+        { 
+             DatagramSocket serverSocket = new DatagramSocket(8888);
+             byte[] receiveData = new byte[1024];             
+             byte[] sendData = new byte[1024];             
+             while(true)                
+                {                   
+                    DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
+                    serverSocket.receive(receivePacket);
+                    //String sentence = new String( receivePacket.getData());
+                    //System.out.println("RECEIVED: " + sentence);
+                    //InetAddress IPAddress = receivePacket.getAddress();
+                    //int port = receivePacket.getPort();
+                    //String capitalizedSentence = sentence.toUpperCase();                   
+                    //sendData = capitalizedSentence.getBytes();
+                    //DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port);
+                    //serverSocket.send(sendPacket);                
+                }       
+        } 
+}