ntp_server.h

#pragma once
 
/************************************************************************************************
 * @file   ntp_server.h
 *
 * @brief  Header file defining the NTPServer class
 *
 * @date   2025-01-04
 * @author Aryan Kashem
 ************************************************************************************************/
 
/* Standard library Headers */
#include <atomic>
#include <chrono>
#include <ctime>
#include <string>
 
/* Inter-component Headers */
#include <arpa/inet.h>
#include <pthread.h>
#include <sys/socket.h>
#include <unistd.h>
 
#include "network_time_protocol.h"
 
/* Intra-component Headers */
 
class NTPServer {
 private:
  static constexpr int NTP_PORT = 123;                   
  static constexpr unsigned int NTP_SYNC_PERIOD_S = 60U; 
  int m_NTPSocket;                 
  std::string m_bindAddress;       
  std::string m_NTPServerAddress;  
  pthread_t m_NTPServerThreadId;   
  std::atomic<bool> m_isListening; 
  NTPPacket processNTPRequest(const NTPPacket &request);
 
  bool queryNTPServer(NTPPacket &response);
 
 public:
  NTPServer();
 
  void NTPServerProcedure();
 
  void startListening(const std::string &bindAddress, const std::string &NTPServerAddress);
};