UDP Packets over LAN

Networking & Multiplayer
#1

I am actually trying to make a game that is played on a pc , controlled by an android tablet. UDP Packets from the android device (ma nexus 7) never reach the PC . Here is the code. Im so fcking mad btw…
Android:

final int bn = b.num;
Log.i(tag, "creating");
Thread t = new Thread(){

@Override
public void run(){
    try {
        sendPacket(bn);
    } catch (SocketException e) {
        e.printStackTrace();
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }
}

private void sendPacket(int i) throws SocketException, UnknownHostException{
    Log.i(tag, "creating buffer");
     String t = ""+1;
     byte[] buf = t.getBytes();
     Log.i(tag, "creating address");
     InetAddress ip = InetAddress.getByName(Dataholder.ip);
     Log.i(tag, "creating socket");//EADDRNOTAVAIL error here
     DatagramSocket s = new DatagramSocket(port , ip);
     Log.i(tag, "creating packet");
     DatagramPacket p = new DatagramPacket(buf , buf.length, ip,port);

     try {
         Log.i(tag, "sending");                      
         s.send(p); 
    } catch (IOException e) {
    }finally{
        s.close();
    }
 }

};
Log.i(tag, "running");
t.run();`

PC:

byte[] data = new byte[1];//I only send 1 digit integers

@SuppressWarnings("resource")//nevermind closing the socket :D
DatagramSocket s = new DatagramSocket(4442);
DatagramPacket p = new DatagramPacket(data, data.length);

System.out.println("Now monitoring...");

while(true){

    s.receive(p);
    System.out.println("Button Pressed! --> "+new             String(p.getData(),0,p.getData().length));//this works the best (I tested it myself)
}

It just stays at monitoring stage^

I am using the port 4442 on both of the machines. Also , the IP that is used on the android part is this one:

#2

Dataholder.ip?

#3

Take a loop at the link I provided on the bottom of the first post!

#4

I did.

#5

Start with TCP. Only move to UDP if you really need it. Which i doubt you do.

Then use something like tcpdump to inspect packets and see if your are in fact sending packets you expect and double check that ip address are right or that your not trying to go across subnet boundaries etc. ie can you ftp/ssh between these devices.