/*
 * This file is part of the Owl Positioning System (OwlPS).
 * OwlPS is a project of the University of Franche-Comté
 * (Université de Franche-Comté), France.
 */


#include "outputudpsocket.hh"
#include "request.hh"
#include "resultlist.hh"
#include "result.hh"
#include "posexcept.hh"

#include <owlps.h>

#include <cstdio> // For perror()

using namespace std ;



/* *** Constructors *** */


OutputUDPSocket::OutputUDPSocket(const string &_remote_host,
                                 const uint_fast16_t _remote_port):
  OutputNetworkSocket(_remote_host, _remote_port)
{
  if (! init_socket())
    throw error_opening_output_file("UDP socket") ;
}



/* *** Operations *** */


/**
 * @return \em true if the socket were successfully opened.
 * @return \em false in case of error.
 */
bool OutputUDPSocket::init_socket()
{
  sockfd = owl_create_udp_trx_socket(remote_host.c_str(), remote_port,
                                     &server_info, &client_info) ;
  return sockfd >= 0 ;
}


/**
 * Sends the text buffer 'data'.
 */
bool OutputUDPSocket::send_data(const string &data) const
{
  unsigned int data_len = data.size() + 1 ; // +1 for the '\0'
  ssize_t nsent = sendto(sockfd, data.c_str(), data_len, 0,
                         (struct sockaddr *) &server_info,
                         sizeof(server_info)) ;
  if (nsent != static_cast<ssize_t>(data_len))
    {
      perror("Error sending result data through the UDP socket") ;
      return false ;
    }
  return true ;
}