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SocketLogin函数过程:Socket连接网易邮件服务器,接收服务器欢迎消息,向服务器发送退出指令,接收服务器Bye消息,关闭socket
SocketGetTime函数过程:Socket连接授时服务器,接收服务器时间消息,关闭socket
效果图:
源代码:
#include "stdafx.h" #include <windows.h> #include <windowsx.h> #include "resource.h" #include "MainDlg.h" #include "winsock2.h" #define HIGHTIME 21968699 // 21968708 // Jan 1, 1900 FILETIME.highTime #define LOWTIME 4259332096 // 1604626432 // Jan 1, 1900 FILETIME.lowtime BOOL WINAPI Main_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { switch(uMsg) { HANDLE_MSG(hWnd, WM_INITDIALOG, Main_OnInitDialog); HANDLE_MSG(hWnd, WM_COMMAND, Main_OnCommand); HANDLE_MSG(hWnd,WM_CLOSE, Main_OnClose); } return FALSE; } BOOL Main_OnInitDialog(HWND hwnd, HWND hwndFocus, LPARAM lParam) { return TRUE; } //声明 void SocketLogin(HWND hwnd); void SocketGetTime(HWND hwnd); void ConvertToSystemTime(DWORD dwTime,LPSYSTEMTIME st); void ShowError(HWND hwnd); void Main_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify) { switch(id) { case IDC_BUTTON_LOGIN: //登录按钮ID { SocketLogin(hwnd); } break; case IDC_BUTTON_GETTIME: //获取时间按钮ID { SocketGetTime(hwnd); } break; default: break; } } void Main_OnClose(HWND hwnd) //此处询问是否退出,关闭窗口时执行,如果不执行函数EndDialog(hwnd, 0)则不退出,可以恶搞哦 ^_^ { int i=MessageBox(NULL,TEXT("您真的退出?"),TEXT("退出"),MB_YESNO);//是、否 if(IDYES==i){ //如果选择"是",选择"否"默认不执行 EndDialog(hwnd, 0); } } void SocketLogin(HWND hwnd){ WSADATA wsaData; //初始化Socket库 WSAStartup(MAKEWORD(2,0),&wsaData); //创建一根电线 SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); SOCKADDR_IN sa; sa.sin_family=AF_INET; //设置电线连接服务器端的端口 sa.sin_port = htons(IPPORT_SMTP); //sa.sin_port = htons(IPPORT_FTP); //123.125.50.135是ping smtp.163.com出来的 sa.sin_addr.S_un.S_addr = inet_addr("220.181.12.16"); if(connect(sock,(SOCKADDR *)&sa,sizeof(sa))==SOCKET_ERROR) //如果发生错误,则调用ShowError(hwnd); { ShowError(hwnd); return; } //接收问候语 TCHAR buff[256]; ZeroMemory(buff,sizeof(buff)/sizeof(TCHAR)); recv(sock,buff,sizeof(buff)/sizeof(TCHAR),0); MessageBox(hwnd,buff,TEXT("返回消息"),MB_OK); //发送消息;注意不能忘了末尾的回车 TCHAR cQuit[] = "QUIT\n"; send(sock,cQuit,lstrlen(cQuit),0); //接收 ZeroMemory(buff,sizeof(buff)/sizeof(TCHAR)); recv(sock,buff,sizeof(buff)/sizeof(TCHAR),0); MessageBox(hwnd,buff,TEXT("返回消息"),MB_OK); closesocket(sock); WSACleanup(); } void SocketGetTime(HWND hwnd){ WSADATA wsaData; //初始化Socket库 WSAStartup(MAKEWORD(2,0),&wsaData); //创建一根电线 SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); SOCKADDR_IN sa; sa.sin_family=AF_INET; //设置电线连接服务器端的端口 sa.sin_port = htons(IPPORT_TIMESERVER); //sa.sin_port = htons(IPPORT_FTP); //128.138.141.172是ping time.nist.gov出来的 sa.sin_addr.S_un.S_addr = inet_addr("128.138.141.172"); if(connect(sock,(SOCKADDR *)&sa,sizeof(sa))==SOCKET_ERROR) { ShowError(hwnd); return; } unsigned long uTime; recv(sock,(char *)&uTime,sizeof(unsigned long),0); uTime = ntohl(uTime); //从网络字节顺序转换为主机字节顺序。不同的CPU中处理整数的方式不一样,有的是低位在前、有的是高位在前。 SYSTEMTIME st; ConvertToSystemTime(uTime,&st); //SetSystemTime(&st);//设置系统时间 TCHAR timeStr[256]; ZeroMemory(timeStr,sizeof(timeStr)/sizeof(TCHAR)); wsprintf(timeStr,"时间正确吗?%i年%i月%i日%i时%i分%i秒",st.wYear,st.wMonth,st.wDay,st.wHour+8,st.wMinute,st.wSecond); MessageBox(NULL,timeStr,TEXT("网络时间"),MB_OK); closesocket(sock); WSACleanup(); } void ConvertToSystemTime(DWORD dwTime,LPSYSTEMTIME st) { UINT64 uiCurTime, uiBaseTime, uiResult; uiBaseTime = ((UINT64) HIGHTIME << 32) + LOWTIME; uiCurTime = (UINT64)dwTime * (UINT64)10000000; uiResult = uiBaseTime + uiCurTime; FileTimeToSystemTime((LPFILETIME)&uiResult, st); } void ShowError(HWND hwnd) { TCHAR* lpMsgBuf; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER| //自动分配消息缓冲区 FORMAT_MESSAGE_FROM_SYSTEM, //从系统获取信息 NULL,GetLastError(), //获取错误信息标识 MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),//使用系统缺省语言 (LPTSTR)&lpMsgBuf, //消息缓冲区 0, NULL); MessageBox(hwnd,lpMsgBuf,"",MB_ICONERROR); }