277 lines
6.2 KiB
C++
277 lines
6.2 KiB
C++
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#include "precomp.h"
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#include "ping.h"
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#include "avutil.h" // for RtStrToInt
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const CHAR g_cszPingData[] = "NetMeetingPing";
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const int PING_BUFFERSIZE = 1024;
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const DWORD PING_TIMEOUT = 4000; // 4 seconds
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const DWORD PING_RETRIES = 4;
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const TCHAR g_cszICMPDLLName[] = _TEXT("icmp.dll");
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//
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// CPing::Ping()
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//
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// Return value:
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// E_FAIL: Function failed
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// S_FALSE: Function succeeded, ping failed
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// S_OK: Function succeeded, ping succeeded
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//
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HRESULT CPing::Ping(DWORD dwAddr, DWORD dwTimeout, DWORD dwRetries)
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{
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DebugEntry(CPing::Ping);
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HRESULT hr = E_FAIL;
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if (0 != dwAddr)
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{
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if (NULL == m_hICMPDLL)
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{
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m_hICMPDLL = ::LoadLibrary(g_cszICMPDLLName);
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}
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if (NULL != m_hICMPDLL)
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{
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m_pfnCreateFile = (PFNIcmpCreateFile)
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::GetProcAddress(m_hICMPDLL, "IcmpCreateFile");
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m_pfnCloseHandle = (PFNIcmpCloseHandle)
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::GetProcAddress(m_hICMPDLL, "IcmpCloseHandle");
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m_pfnSendEcho = (PFNIcmpSendEcho)
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::GetProcAddress(m_hICMPDLL, "IcmpSendEcho");
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if ((NULL != m_pfnCreateFile) &&
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(NULL != m_pfnCloseHandle) &&
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(NULL != m_pfnSendEcho))
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{
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HANDLE hPing = m_pfnCreateFile();
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if (NULL != hPing)
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{
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BYTE buffer[PING_BUFFERSIZE];
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for (DWORD dwTry = 0; dwTry < dwRetries; dwTry++)
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{
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DWORD dwStatus = m_pfnSendEcho( hPing,
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dwAddr,
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(LPVOID) g_cszPingData,
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(WORD) CCHMAX(g_cszPingData),
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NULL,
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buffer,
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sizeof(buffer),
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dwTimeout);
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if (0 != dwStatus)
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{
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if (((PICMP_ECHO_REPLY)buffer)->Status == IP_SUCCESS)
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{
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TRACE_OUT(("ping: %d.%d.%d.%d succeeded",
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((LPBYTE)&dwAddr)[0],
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((LPBYTE)&dwAddr)[1],
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((LPBYTE)&dwAddr)[2],
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((LPBYTE)&dwAddr)[3]));
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hr = S_OK; // function succeeded - ping succeeded
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}
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else
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{
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TRACE_OUT(("ping: %d.%d.%d.%d failed",
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((LPBYTE)&dwAddr)[0],
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((LPBYTE)&dwAddr)[1],
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((LPBYTE)&dwAddr)[2],
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((LPBYTE)&dwAddr)[3]));
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hr = S_FALSE; // function succeeded - ping failed
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}
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break;
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}
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else
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{
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TRACE_OUT(("ping: %d.%d.%d.%d did not respond",
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((LPBYTE)&dwAddr)[0],
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((LPBYTE)&dwAddr)[1],
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((LPBYTE)&dwAddr)[2],
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((LPBYTE)&dwAddr)[3]));
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}
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}
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m_pfnCloseHandle(hPing);
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}
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else
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{
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ERROR_OUT(("IcmpCreateFile() failed"));
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}
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}
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else
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{
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ERROR_OUT(("Could not find icmp.dll entry points"));
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}
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}
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else
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{
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ERROR_OUT(("Could not load icmp.dll"));
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}
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}
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DebugExitHRESULT(CPing::Ping, hr);
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return hr;
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}
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BOOL CPing::IsAutodialEnabled ( VOID )
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{
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// Figure out the os platform if not done so
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//
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if (m_dwPlatformId == PLATFORM_UNKNOWN)
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{
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OSVERSIONINFO osvi;
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ZeroMemory (&osvi, sizeof (osvi));
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osvi.dwOSVersionInfoSize = sizeof (osvi);
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if (GetVersionEx (&osvi))
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{
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m_dwPlatformId = osvi.dwPlatformId;
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}
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else
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{
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return FALSE;
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}
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}
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// Check autodial enabling for either platform
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//
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BOOL fEnabled;
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switch (m_dwPlatformId)
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{
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case VER_PLATFORM_WIN32_WINDOWS: // 1, Windows 95
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fEnabled = IsWin95AutodialEnabled ();
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break;
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case VER_PLATFORM_WIN32_NT: // 2, Windows NT
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fEnabled = IsWinNTAutodialEnabled ();
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break;
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case VER_PLATFORM_WIN32s: // 0, Windows 3.1
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default: // unknown
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ASSERT (FALSE);
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fEnabled = FALSE;
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break;
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}
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return fEnabled;
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}
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#define c_szWin95AutodialRegFolder TEXT ("Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings")
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#define c_szWin95AutodialRegKey TEXT ("EnableAutodial")
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BOOL CPing::IsWin95AutodialEnabled ( VOID )
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{
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// Always check the registry
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//
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BOOL fEnabled = FALSE;
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// Need to check the registry setting.
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// In case of error, report no autodial.
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//
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HKEY hKey;
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if (RegOpenKeyEx ( HKEY_CURRENT_USER,
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c_szWin95AutodialRegFolder,
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0,
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KEY_READ,
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&hKey) == NOERROR)
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{
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TCHAR szValue[16];
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ZeroMemory (&szValue[0], sizeof (DWORD));
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ULONG cb = sizeof (szValue);
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DWORD dwType;
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if (RegQueryValueEx (hKey, c_szWin95AutodialRegKey, NULL,
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&dwType, (BYTE *) &szValue[0], &cb)
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== NOERROR)
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{
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switch (dwType)
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{
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case REG_DWORD:
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case REG_BINARY:
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fEnabled = (BOOL) *(LONG *) &szValue[0];
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break;
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#if 0 // do not need to worry about this case, IE must maintain backward compatibility
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case REG_SZ:
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fEnabled = (BOOL) RtStrToInt (&szValue[0]);
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break;
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#endif // 0
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default:
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ASSERT (FALSE);
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break;
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}
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}
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RegCloseKey (hKey);
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}
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return fEnabled;
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}
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// RAS only runs on NT 4.0 or later, as a result, WINVER must be 0x401 or larger
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//
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#if (WINVER < 0x401)
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#undef WINVER
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#define WINVER 0x401
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#endif
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#include <ras.h>
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// DWORD APIENTRY RasGetAutodialParamA( DWORD, LPVOID, LPDWORD ); // defined in <ras.h>
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// DWORD APIENTRY RasGetAutodialParamW( DWORD, LPVOID, LPDWORD ); // defined in <ras.h>
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typedef DWORD (APIENTRY *PFN_RasGetAutodialParam) ( DWORD, LPVOID, LPDWORD );
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#define c_szRasGetAutodialParam "RasGetAutodialParamW"
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#define c_szRasApi32Dll TEXT ("rasapi32.dll")
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BOOL CPing::IsWinNTAutodialEnabled ( VOID )
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{
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// Decide if we want to check autodial registry setting
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//
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BOOL fEnabled = FALSE;
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if (m_fWinNTAutodialEnabled == AUTODIAL_UNKNOWN)
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{
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// We do not want to have initialization error
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//
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UINT uErrMode = SetErrorMode (SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
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// Load the library rasapi32.dll from the system directory
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//
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HINSTANCE hRasApi32Dll = LoadLibrary (c_szRasApi32Dll);
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if (hRasApi32Dll != NULL)
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{
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// Get the proc address for RasGetAutodialParam()
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//
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PFN_RasGetAutodialParam pfn = (PFN_RasGetAutodialParam)
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GetProcAddress (hRasApi32Dll, c_szRasGetAutodialParam);
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if (pfn != NULL)
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{
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// Query RAS if it disables autodial
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//
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DWORD dwVal, dwSize = sizeof (DWORD);
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DWORD dwErr = (*pfn) (RASADP_LoginSessionDisable, &dwVal, &dwSize);
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if (dwErr == 0)
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{
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// Set the autodial flag only when everything succeeds
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//
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fEnabled = (dwVal == 0);
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}
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}
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FreeLibrary (hRasApi32Dll);
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}
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// Restore error mode
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//
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SetErrorMode (uErrMode);
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m_fWinNTAutodialEnabled = fEnabled;
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}
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else
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{
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// Do not need to check the registry setting.
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// Simply use the cached one.
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//
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fEnabled = m_fWinNTAutodialEnabled;
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}
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return fEnabled;
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}
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