/*
   * Copyright (C) 2016 Luminița Lăzărescu <cluminita.lazarescu@gmail.com>
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  /**
   * @ingroup     sys_shell_commands
   * @{
   *
   * @file
   * @brief       Prints the real time offset from the system time
   *
   * @author      Luminița Lăzărescu <cluminita.lazarescu@gmail.com>
   */
  

  #include <stdio.h>

  #include "net/sntp.h"
  #include "net/ntp_packet.h"
  #include "net/af.h"
  #include "net/ipv6/addr.h"
  
  #define _DEFAULT_TIMEOUT (5000U);
  
  static void _usage(char *cmd)
  {
      printf("Usage: %s <server addr> [<timeout>]\n", cmd);
      puts("default: timeout = 5000");
  }
  
  int _ntpdate(int argc, char **argv)
  {
      uint32_t timeout = _DEFAULT_TIMEOUT;
  
      if (argc < 2) {
          _usage(argv[0]);
          return 1;
      }
      sock_udp_ep_t server = { .port = NTP_PORT, .family = AF_INET6 };
      ipv6_addr_from_str((ipv6_addr_t *)&server.addr, argv[1]);
      if (argc > 2) {
          timeout = atoi(argv[2]);
      }
      if (sntp_sync(&server, timeout) < 0) {
          puts("Error in synchronization");
          return 1;
      }
      printf("Offset: %i\n", (int)sntp_get_offset());
      return 0;
  }