网络时间协议 --- 网络对时程序

曾经终败给现在 2022-01-15 01:49 227阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

1 // TCPIP time protocol.cpp : 定义控制台应用程序的入口点。 2 // 3 
     4 #include "stdafx.h"
     5  #include <winsock2.h>
     6  #include <stdio.h>
     7  #pragma comment(lib,"WS2_32")
     8  class CInitSock 9 { 10  public: 11      CInitSock(BYTE minorVer=2,BYTE majorVer=2) 12 { 13 WSADATA wsaData; 14          WORD sockVersion = MAKEWORD(minorVer,majorVer); 15          if(::WSAStartup(sockVersion,&wsaData)!=0) 16 { 17              exit(0); 18 } 19 } 20      ~CInitSock() 21 { 22 ::WSACleanup(); 23 } 24 }; 25 CInitSock initSock; 26 void SetTimeFromTP(ULONG ulTime) 27 { 28 FILETIME ft; 29 SYSTEMTIME st; 30     st.wYear = 1900; 31     st.wMonth = 1; 32     st.wDay = 1; 33     st.wHour = 0; 34     st.wMinute = 0; 35     st.wSecond = 0; 36     st.wMilliseconds = 0; 37     SystemTimeToFileTime(&st,&ft); 38 
    39     LONGLONG *pLLong=(LONGLONG*)&ft; 40     *pLLong +=(LONGLONG)10000000*ulTime; 41     FileTimeToSystemTime(&ft,&st); 42     SetSystemTime(&st); 43 } 44 int main() 45 { 46     SOCKET s = ::socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); 47     if(s == INVALID_SOCKET) 48 { 49         printf("Failed socket()\n"); 50         return 0; 51 } 52 sockaddr_in servAddr; 53     servAddr.sin_family = AF_INET; 54     servAddr.sin_port = htons(37); 55 
    56     servAddr.sin_addr.S_un.S_addr = inet_addr("18.145.0.30"); 57     if(::connect(s,(sockaddr*)&servAddr,sizeof(servAddr)) == -1) 58 { 59         printf("Failed connect()\n"); 60         return 0; 61 } 62 
    63     ULONG ulTime = 0; 64     int nRecv = ::recv(s,(char*)&ulTime,sizeof(ulTime),0); 65     if(nRecv>0) 66 { 67         ulTime=ntohl(ulTime); 68 SetTimeFromTP(ulTime); 69         printf("成功与时间服务器的时间同步！\n"); 70 } 71     else
    72 { 73         printf("时间服务器不能确定当前时间!\n"); 74 } 75 ::closesocket(s); 76     return 0; 77 }

试了好多服务器IP地址，都不好使.....郁闷....

转载于:https://my.oschina.net/u/204616/blog/545062

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220114/75f2f652d8a746aa99c414b62635e16b.png