Description
int 
radius_send_request ( resource radius_handle )
   After the Radius request has been constructed, it is sent by
   radius_send_request().
  
   The radius_send_request() function sends the request and
   waits for a valid reply, retrying the defined servers in round-robin
   fashion as necessary.
  
Return Values
   If a valid response is received, radius_send_request()
   returns the Radius code which specifies the type of the response. This will
   typically be RADIUS_ACCESS_ACCEPT,
   RADIUS_ACCESS_REJECT, or
   RADIUS_ACCESS_CHALLENGE. If no valid response is
   received, radius_send_request() returns FALSE.