MFC 实现ping功能。整理来的

来源：互联网发布：linux安装gcc教程编辑：程序博客网时间：2024/04/29 13:10
// 参数：//     szTarget目标地址（可以是域名、IP地址）//     dwTime返回时间；如果是超时，等于INFINITEBOOL Ping(LPCTSTR szTarget, DWORD &dwTime){    BOOL bSuccess = FALSE;    dwTime = INFINITE;    if(szTarget == NULL)    {        TRACE0("Target Is NULL\n");        return FALSE;    }    TCHAR szCmdLine[80];    if(_sntprintf(szCmdLine, sizeof(szCmdLine) / sizeof(TCHAR),        _T("ping.exe -n 1 %s"), szTarget) == sizeof(szCmdLine) / sizeof(TCHAR))    {        TRACE0("Target Is Too Long\n");        return FALSE;    }    HANDLE hWritePipe = NULL;    HANDLE hReadPipe = NULL;    HANDLE hWriteShell = NULL;    HANDLE hReadShell = NULL;    SECURITY_ATTRIBUTES  sa;    memset(&sa, 0, sizeof(sa));    sa.nLength = sizeof(sa);    sa.bInheritHandle = TRUE;    sa.lpSecurityDescriptor = NULL;    if(CreatePipe(&hReadPipe, &hReadShell, &sa, 0)        && CreatePipe(&hWriteShell, &hWritePipe, &sa, 0))    {        STARTUPINFO            si;        memset(&si, 0, sizeof(si));        si.cb           = sizeof(si);        si.dwFlags      = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;        si.hStdInput    = hWriteShell;        si.hStdOutput   = hReadShell;        si.hStdError    = hReadShell;        si.wShowWindow  = SW_HIDE;                PROCESS_INFORMATION    pi;        memset(&pi, 0, sizeof(pi));                int nMin = -1, nMax = -1, nAvg = -1;        if(CreateProcess(NULL, szCmdLine, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi))        {            if(WaitForSingleObject(pi.hProcess, 10000) == WAIT_OBJECT_0)            {                TCHAR szBuffer[1024];                DWORD dwBytes;                if(ReadFile(hReadPipe, szBuffer, sizeof(szBuffer), &dwBytes, NULL))                {                    szBuffer[dwBytes] = '\0';                    LPTSTR lpszTime = NULL;                    lpszTime = _tcsstr(szBuffer, _T("Request timed out"));                    if(lpszTime == NULL)                    {                        lpszTime = _tcsstr(szBuffer, _T("Minimum"));                        if(lpszTime != NULL)                        {                            if(_stscanf(lpszTime, _T("Minimum = %dms, Maximum = %dms, Average = %dms"),                                &nMin, &nMax, &nAvg) == 3)                            {                                TRACE3("%d, %d, %d\n", nMin, nMax, nAvg);                                dwTime = nAvg;                                bSuccess = TRUE;                            }                        }                        else                        {                            TRACE0("PING FORMAT is Error\n");                        }                    }                    else                    {                        TRACE0("PING is Time Out\n");                        bSuccess = TRUE;                    }                                    }            }            else            {                TRACE1("Process(%d) is Time Out\n", pi.dwProcessId);                TerminateProcess(pi.hProcess, 0);            }            CloseHandle(pi.hThread);            CloseHandle(pi.hProcess);            TRACE3(_T("Minimum = %dms, Maximum = %dms, Average = %dms\n"), nMin, nMax, nAvg);        }    }    if(hWritePipe != NULL)        CloseHandle(hWritePipe);    if(hReadPipe != NULL)        CloseHandle(hReadPipe);    if(hWriteShell != NULL)        CloseHandle(hWriteShell);    if(hReadShell != NULL)        CloseHandle(hReadShell);    return bSuccess;}
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