/*!
 * \file      udp_layer.hh
 * \brief     Header file for ITS UDP/IP protocol layer definition.
 * \author    ETSI STF525
 * \copyright ETSI Copyright Notification
 *            No part may be reproduced except as authorized by written permission.
 *            The copyright and the foregoing restriction extend to reproduction in all media.
 *            All rights reserved.
 * \version   0.1
 */
#pragma once

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include "t_layer.hh"
#include "params.hh"

class PORT; //! Forward declaration of TITAN class

/*!
 * \class udp_layer
 * \brief  This class provides description of ITS UDP/IP protocol layer
 */
class udp_layer : public layer, public PORT {
  params _params;            //! Layer parameters
  struct sockaddr_in _saddr; //! Source socket address description
  struct sockaddr_in _daddr; //! Destination socket address description
  boolean _reuse_incoming_source_adddress;
                             //! This flag must be set to true if the UpperTester/UDP layer must act as an IUT, not as a Test System. Default value: Test System
  int _fd;                   // Socket file descriptor
  std::string _time_key;     //! \todo

public: //! \publicsection
  /*!
   * \brief Specialised constructor
   *        Create a new instance of the udp_layer class
   * \param[in] p_type \todo
   * \param[in] p_param \todo
   */
  udp_layer(const std::string & p_type, const std::string & p_param);
  /*!
   * \brief Default destructor
   */
  virtual ~udp_layer();

  /*!
   * \virtual
   * \fn void send_data(OCTETSTRING& data, params& params);
   * \brief Send bytes formated data to the lower layers
   * \param[in] p_data The data to be sent
   * \param[in] p_params Some parameters to overwrite default value of the lower layers parameters
   */
  virtual void send_data(OCTETSTRING& data, params& params);
  /*!
   * \virtual
   * \fn void receive_data(OCTETSTRING& data, params& params);
   * \brief Receive bytes formated data from the lower layers
   * \param[in] p_data The bytes formated data received
   * \param[in] p_params Some lower layers parameters values when data was received
   */
  virtual void receive_data(OCTETSTRING& data, params& info);
  
  void Handle_Fd_Event_Readable(int fd);

private:
  unsigned long get_host_id(const std::string& p_host_name);
  void close();
}; // End of class udp_layer