时间同步程序 命令行版 

  1 #include <iostream>
  2 #include <stddef.h>
  3 #include <time.h>
  4 #include <WinSock.h>
  5 #pragma comment (lib,"Ws2_32")
  6 
  7 using namespace std;
  8 
  9 struct   NTP_Packet
 10 {
 11     int      Control_Word;   
 12     int      root_delay;   
 13     int      root_dispersion;   
 14     int      reference_identifier;   
 15     __int64    reference_timestamp;   
 16     __int64 originate_timestamp;   
 17     __int64 receive_timestamp;   
 18     int      transmit_timestamp_seconds;   
 19     int      transmit_timestamp_fractions;   
 20 };
 21 
 22 /************************************************************************/
 23 /* 函数说明:自动与时间服务器同步更新
 24 /* 参数说明:无
 25 /* 返 回 值:成功返回TRUE，失败返回FALSE
 26 /************************************************************************/
 27 BOOL UpdateSysTime()
 28 {
 29     WORD    wVersionRequested;
 30     WSADATA wsaData;
 31     
 32     // 初始化版本
 33     wVersionRequested = MAKEWORD( 1, 1 );
 34     if (0!=WSAStartup(wVersionRequested, &wsaData)) 
 35     {
 36         WSACleanup();
 37         return FALSE;
 38     }
 39     if (LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1) 
 40     {
 41         WSACleanup( );
 42         return FALSE; 
 43     }
 44 
 45     // 这个IP是中国大陆时间同步服务器地址，可自行修改
 46     SOCKET soc=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
 47     struct sockaddr_in addrSrv;
 48     addrSrv.sin_addr.S_un.S_addr=inet_addr("132.163.4.101");//美国国家标准化研究所 
 49     addrSrv.sin_family=AF_INET;
 50     addrSrv.sin_port=htons(37);//端口是37 
 51     
 52     NTP_Packet NTP_Send,NTP_Recv; 
 53     NTP_Send.Control_Word   =   htonl(0x0B000000);   
 54     NTP_Send.root_delay        =   0;   
 55     NTP_Send.root_dispersion   =   0;   
 56     NTP_Send.reference_identifier    =   0;   
 57     NTP_Send.reference_timestamp    =   0;   
 58     NTP_Send.originate_timestamp    =   0;   
 59     NTP_Send.receive_timestamp        =   0;   
 60     NTP_Send.transmit_timestamp_seconds        =   0;   
 61     NTP_Send.transmit_timestamp_fractions   =   0; 
 62 
 63     if(SOCKET_ERROR==sendto(soc,(const char*)&NTP_Send,sizeof(NTP_Send),
 64         0,(struct sockaddr*)&addrSrv,sizeof(addrSrv)))
 65     {
 66         closesocket(soc);
 67         return FALSE;
 68     }
 69     
 70     int sockaddr_Size =sizeof(addrSrv);
 71     if(SOCKET_ERROR==recvfrom(soc,(char*)&NTP_Recv,sizeof(NTP_Recv),
 72         0,(struct sockaddr*)&addrSrv,&sockaddr_Size))
 73     {
 74         closesocket(soc);
 75         return FALSE;
 76     }
 77 
 78     closesocket(soc);
 79     WSACleanup();
 80 
 81     SYSTEMTIME    newtime;
 82     float        Splitseconds;
 83     struct        tm    *lpLocalTime;
 84     time_t        ntp_time;
 85 
 86     // 获取时间服务器的时间
 87     ntp_time    = ntohl(NTP_Recv.transmit_timestamp_seconds)-2208988800;
 88     lpLocalTime = localtime(&ntp_time);
 89     if(lpLocalTime == NULL)
 90     {
 91         return FALSE;
 92     }
 93     
 94     // 获取新的时间
 95     newtime.wYear      =lpLocalTime->tm_year+1900;
 96     newtime.wMonth     =lpLocalTime->tm_mon+1;
 97     newtime.wDayOfWeek =lpLocalTime->tm_wday;
 98     newtime.wDay       =lpLocalTime->tm_mday;
 99     newtime.wHour      =lpLocalTime->tm_hour;
100     newtime.wMinute    =lpLocalTime->tm_min;
101     newtime.wSecond    =lpLocalTime->tm_sec;
102     
103     // 设置时间精度
104     Splitseconds=(float)ntohl(NTP_Recv.transmit_timestamp_fractions);
105     Splitseconds=(float)0.000000000200 * Splitseconds;
106     Splitseconds=(float)1000.0 * Splitseconds;
107     newtime.wMilliseconds   =   (unsigned   short)Splitseconds;
108 
109 
110     // 修改本机系统时间
111     SetLocalTime(&newtime);
112     return TRUE;
113 }
114 
115 int main(int argc, char *argv[])
116 {
117     UpdateSysTime(); 
118     return 0;
119 }

 

posted @ 2013-01-05 18:39  syrchina  阅读(423)  评论(0)    收藏  举报