UDP connection test on BlackBerry Simulator

Question

Hi,

I am trying to send data using UDP (datagram). I am not able to test application on simulator. I tried running MDS first and then simulator,but it did not work. The error is displayed as Port 8080 already in use on BlackBerry simulator console. How do I change port in simulator? The UDP port to which I am connecting is localhost:5014 I am using simulator for BlackBerry Pearl 8100. I am new to BlackBerry networking. Please help me.

Thanks.

Answer 1

On the Blackberry forum there are comments about issues with datagram under 4.5.0.x up to 4.5.0.83. No wonder there are no UDP samples in sdk. You always can download 8100 with 4.5.0.108 simulator from http://na.blackberry.com/eng/developers/

Another thing is to use ip, although hostname is allowed in api reference, but when you use MDS simulator it grabs localhost alias.

In the following code you have simple server which is listening to port 135, and bb client which is sending data packet to 127.0.0.1 on port 135.

Desktop server code:

public static void main(String[] args) {
 byte[] inBuff = new byte[32];
 DatagramSocket socket;
 try {
  socket = new DatagramSocket(137);
  DatagramPacket pckt = new DatagramPacket(inBuff, inBuff.length);
  while (true) {
   socket.receive(pckt);
   System.out.println(new Date() + " " + pckt.getAddress()
     + ":" + pckt.getPort());
   socket.send(pckt);
  }
 } catch (Exception e) {
  System.out.println(e.getMessage()+":");
  System.out.println(e.getClass().getName());
 }
}

BlackBerry client code (tested with Bold 8900 under 4.6.1):

 UDPDatagramConnection connection = null;
 byte[] outBuff = "Hello!".getBytes();
 Datagram outDatagram = null;
 try {
  connection = (UDPDatagramConnection) Connector
    .open("datagram://127.0.0.1:137");
  outDatagram = connection.newDatagram(outBuff, outBuff.length);
  connection.send(outDatagram);
  System.out.println("Datagram packet was sent");
 } catch (Exception e) {
  System.out.println(e.getMessage()+":");
  System.out.println(e.getClass().getName());
 }