#ifndef _NTP_CLIENT_H_#define _NTP_CLIENT_H_#include "config.h"#include "mynic.h"#include "../io/clock.h"#include <stdint.h>#include <avr/pgmspace.h>#define NTP_DATALENGTH 48#define NTP_POS_FLAGS          (UDP_POS_DATA + 0)#define NTP_POS_STRATUM        (UDP_POS_DATA + 1)#define NTP_POS_POLL_INTERVAL  (UDP_POS_DATA + 2)#define NTP_POS_PRECISION      (UDP_POS_DATA + 3)#define NTP_POS_ROOT_DELAY     (UDP_POS_DATA + 4)#define NTP_POS_CLOCK_DISP     (UDP_POS_DATA + 8)//...#define NTP_POS_TX_TIMESTAMP   (UDP_POS_DATA + 40)#define NTP_POS_LAST_DATA      (UDP_POS_DATA + NTP_DATALENGTH)#define NTP_FLAG_NTP4_SERVER   0x24#define NTP_TIME_YEAR  0 #define NTP_TIME_MONTH 1#define NTP_TIME_DAY   2#define NTP_TIME_HOUR  3#define NTP_TIME_MIN   4#define NTP_TIME_SEC   5extern PROGMEM char NTP_MONTH_TO_DAYS[12];extern uint32_t ntp_server_ip;extern char ntp_client_call_again;//ntp client init void ntp_client_init(void);//send NTP requestvoid ntp_client_send_request(unsigned char *buffer);//decode an ntp packet & extract time datavoid ntp_client_decode_packet(unsigned char *buffer, unsigned int len);//convert unix timestamp to date/time.void ntp_client_timestamp_to_time(unsigned long timestamp, unsigned char *time);#endif