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


int main(char[][] args) {
  if (args.length != 4) {
    printf("illegal arguments\n");
    return 1;
  }

  char[] DYN_ID        = args[1];
  char[] SHARED_SECRET = args[2];

  char[] SERVER_IP     = args[3];
  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();

  return 0;
}