Hi, I'm trying to develop an application that need to send UDP
Multicast packets to the local network.
There is a few equipments that respond to this packets and send back
some informations.
I'm not worried with the server right now, because there is a server
on the same network that collect all this multicast data.
I just want to make my mobile able to send the request message to
start the process.
My client class is called MCastClient, see below:
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;
public class MCastClient {
private int port = 50000;
private String addr = "239.192.1.100";
private MulticastSocket sock = null;
public void sendData(String data) {
try {
InetAddress group = InetAddress.getByName(addr);
sock = new MulticastSocket(port);
sock.joinGroup(group);
DatagramPacket dataPckt = new
DatagramPacket(data.getBytes(),
data.length(), group, port);
sock.send(dataPckt);
sock.leaveGroup(group);
sock.close();
} catch (Exception e) {}
}
}
It runs perfectly on my computer as a Java Application.
On the Android Emulator i create a simple application with a button
and add a OnClickListener.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final MCastClient mcClient = new MCastClient();
Button btn = (Button)findViewById(R.id.btn_send);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mcClient.sendData("001RequestData");
}
});
I believe that my packet is not arriving on the local network.
I already did some test with the command "redir add udp:50000:50000"
on telnet port of the emulator, that i got from
http://developer.android.com/guide/developing/tools/emulator.html#connecting.
There is any other command that can forward ports to the emulator?
I'm almost putting a port sniffer on my machine just to check what is
happening.
Thanks for the help, it will be very appreciated.
Thiago B.
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