The following is the listen function I used to receive multicast
packets.
"socket.receive" can not receive packets from remote peer, but it can
receive packets sent from local.
public static void listen() throws IOException {
Runnable r = new Runnable() {
public void run() {
while (true) {
try {
MulticastSocket socket = new MulticastSocket
(1900);
Log.v(TAG, "Setting multicast network
interface: " + ni);
socket.setNetworkInterface(ni);
socket.setTimeToLive(4);
socket.setReuseAddress(true);
socket.joinGroup(getMulticastAddress());
while(true)
{
byte[] buf = new byte[1024];
DatagramPacket packet_r = new
DatagramPacket(buf, buf.length);
socket.receive(packet_r);
String s = new String(packet_r.getData());
Log.v(TAG, "Receiving a Multicast from ["
+ packet_r.getAddress().getHostAddress() + ":" + packet_r.getPort() +
"]");
Log.v(TAG, "Data: " + s);
CharSequence data = packet_r.getAddress
().getHostAddress() + ":" + packet_r.getPort();
Toast.makeText(view, data,
Toast.LENGTH_SHORT).show();
}
} catch (IOException e) {
Log.v(TAG, "UPNP network exception", e);
try {
Thread.sleep(1000);
} catch (InterruptedException e1) {}
}
}
}};
sListener = new Thread(r);
sListener.start();
}
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