private void handlePacket(DatagramPacket receivedDatagram) throws IOException {
byte[] received = receivedDatagram.getData();
if (received[2] == 2) {
System.out.println(" Discovery packet received ");
this.remoteAddress = receivedDatagram.getAddress();
this.remotePort = receivedDatagram.getPort();
System.out.println(
" Discovery Remote Address " + this.remoteAddress + " Remote Port " + this.remotePort);
byte[] response = getDiscoveryReplyMessage();
DatagramPacket datagram =
new DatagramPacket(response, response.length, this.remoteAddress, this.remotePort);
socket.send(datagram);
System.out.println(" Discovery reply packet sent ");
return;
} else if (received[2] == 4) {
if (received[3] == 1 || received[3] == 3) {
running = true;
this.remotePort = receivedDatagram.getPort();
System.out.println(
" Data Remote Address " + this.remoteAddress + " Remote Port " + this.remotePort);
System.out.println(" SDR Program sends Start command ");
return;
} else {
last_sequence_number = 0;
running = false;
System.out.println(" SDR Program sends Stop command ");
return;
}
}
if (isValidFrame(received)) {
// packet contains 2 hpsdr frames; so 2 c&c's
byte[] cc = new byte[5];
System.arraycopy(received, 11, cc, 0, 5); // index 11 .... 15
ccontrol.CommandAndControl(cc);
System.arraycopy(received, 523, cc, 0, 5); // index 523 .... 531 (8
// + 512 + 3 sync)
ccontrol.CommandAndControl(cc);
nrx = ccontrol.getNrOfReceivers();
if (ccontrol.isControlDataChanged()) {
rxHandler.setRXFrequency(ccontrol.getRXFrequency());
System.out.println("Number of receivers " + nrx);
}
// lees data en vul buffers
for (int frame = 0; frame < 2; frame++) {
int coarse_pointer = frame * 512 + 8;
for (int j = 8; j < 512; j += 8) {
int k = coarse_pointer + j;
// M
// No codec.. skip
// TX IQ
// No tx yet
}
}
} else {
System.out.println(" Invalid frame ");
}
}
