windows系统下向NTP服务器请求时间代码 C语言 vs windows socket udp

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#ifdef _WIN32

#include <string.h>

#include<WS2tcpip.h>

#include <windows.h>

#pragma comment(lib,"ws2_32.lib")

#else

＃include "logLib.h"

＃include "socket.h"

#endif

#define DIFF 4294.967296

#define GAP 2208988800

#define NTP_VERSION 3

#define NTP_MODE_CLIENT 0x3

#define NTP_HEADER_VERSION_SET(_header, _x) (_header |= ((_x & 0x7) << 0))

#define NTP_HEADER_MODE_SET(_header, _x) (_header |= ((_x & 0x7) << 3))

typedef struct

{

unsigned int seconds;

unsigned int fraction;

} ntp_timestamp;

typedef struct

{

int header;

int root_delay;

int root_dispersion;

int reference_identifier;

ntp_timestamp