import std.stdio;
import std.socket;
import std.date;
import std.string;
import std.md5;


void main() {
  const char[] DYN_ID        = "test";
  const char[] SHARED_SECRET = "geheim";

  const char[] SERVER_IP     = "172.16.2.1";
  const int SERVER_PORT      = 8053;

  
  long time = getUTCtime() / TicksPerSecond;
  char[] data = format("%s %s %d", DYN_ID, SHARED_SECRET, time);

  ubyte[16] checksum;
  sum(checksum, data);

  char[] dataToSend = format("%s %d %s", DYN_ID, time, tolower(digestToString(checksum)));

  Socket sock = new UdpSocket(AddressFamily.INET);
  InternetAddress serverAddress = new InternetAddress(SERVER_IP, SERVER_PORT);
  sock.sendTo(dataToSend, serverAddress);
  sock.close();
}