136 lines
3.9 KiB
C++
136 lines
3.9 KiB
C++
// wuauserv.cpp
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#include <windows.h>
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#include <ausvc.h>
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#include <wusafefn.h>
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typedef HRESULT (WINAPI *AUSERVICEMAIN)(DWORD dwNumServicesArg,
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LPWSTR *lpServiceArgVectors,
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AUSERVICEHANDLER pfnServiceHandler,
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BOOL fJustSelfUpdated);
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AUSERVICEMAIN g_pfnServiceMain = NULL;
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AUSERVICEHANDLER g_pfnServiceHandler = NULL;
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AUGETENGSTATUS g_pfnGetEngineStatusInfo = NULL;
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AUREGSERVICEVER g_pfnRegisterServiceVersion = NULL;
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CRITICAL_SECTION csWuaueng;
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DWORD WINAPI ServiceHandler(DWORD fdwControl, DWORD dwEventType, LPVOID pEventData, LPVOID lpContext)
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{
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DWORD dwRet = NOERROR;
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EnterCriticalSection(&csWuaueng);
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if ( NULL != g_pfnServiceHandler )
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{
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dwRet = g_pfnServiceHandler(fdwControl, dwEventType, pEventData, lpContext);
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}
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else
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{
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dwRet = ERROR_CALL_NOT_IMPLEMENTED;
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}
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LeaveCriticalSection(&csWuaueng);
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return dwRet;
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}
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void WINAPI ServiceMain(DWORD dwNumServicesArg, LPWSTR *lpServiceArgVectors)
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{
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HRESULT hr = S_OK;
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HMODULE hModule = NULL;
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AUENGINEINFO_VER_1 engineInfo;
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DWORD dwEngineVersion = 0;
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BOOL fCompatibleEngineVersion = FALSE;
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if ( !SafeInitializeCriticalSection(&csWuaueng) )
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{
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return;
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}
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do
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{
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EnterCriticalSection(&csWuaueng);
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fCompatibleEngineVersion = FALSE;
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g_pfnServiceHandler = NULL;
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g_pfnGetEngineStatusInfo = NULL;
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g_pfnRegisterServiceVersion = NULL;
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// check if we need to release wuaueng.dll
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if ( (S_FALSE == hr) && !FreeLibrary(hModule) )
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{
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hr = E_FAIL;
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hModule = NULL;
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g_pfnServiceMain = NULL;
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g_pfnServiceHandler = NULL;
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}
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else
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{
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// if we can't load wuaueng.dll, we fail to start
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if ( (NULL == (hModule = LoadLibraryFromSystemDir(TEXT("wuaueng.dll")))) ||
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(NULL == (g_pfnServiceMain = (AUSERVICEMAIN)::GetProcAddress(hModule, "ServiceMain"))) ||
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(NULL == (g_pfnServiceHandler = (AUSERVICEHANDLER)::GetProcAddress(hModule, "ServiceHandler"))) )
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{
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hr = E_FAIL;
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g_pfnServiceMain = NULL;
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g_pfnServiceHandler = NULL;
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}
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else //wuaueng.dll successfully loaded, check to see if the engine supports following entry points
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{
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if ( (NULL != (g_pfnRegisterServiceVersion = (AUREGSERVICEVER)::GetProcAddress(hModule, "RegisterServiceVersion"))) &&
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(NULL != (g_pfnGetEngineStatusInfo = (AUGETENGSTATUS)::GetProcAddress(hModule, "GetEngineStatusInfo"))) )
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{
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fCompatibleEngineVersion = TRUE;
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}
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}
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}
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LeaveCriticalSection(&csWuaueng);
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if ( SUCCEEDED(hr) )
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{
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if (fCompatibleEngineVersion)
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{
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// Register service version with engine and check if engine supports the service version
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fCompatibleEngineVersion = g_pfnRegisterServiceVersion(AUSRV_VERSION, &dwEngineVersion);
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}
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hr = g_pfnServiceMain(dwNumServicesArg, lpServiceArgVectors, ServiceHandler,
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(S_FALSE == hr) ? TRUE: FALSE /* we just reloaded wuaueng.dll */);
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if(fCompatibleEngineVersion)
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{
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//The engine service main has exited, set the service status to SERVICE_STOP_PENDING
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fCompatibleEngineVersion = g_pfnGetEngineStatusInfo((void*)&engineInfo);
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}
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}
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} while ( S_FALSE == hr );
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EnterCriticalSection(&csWuaueng);
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if ( NULL != hModule )
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{
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FreeLibrary(hModule);
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}
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g_pfnServiceHandler = NULL;
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g_pfnGetEngineStatusInfo = NULL;
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g_pfnRegisterServiceVersion = NULL;
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LeaveCriticalSection(&csWuaueng);
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DeleteCriticalSection(&csWuaueng);
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if(fCompatibleEngineVersion)
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{
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//stop the service
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engineInfo.serviceStatus.dwCurrentState = SERVICE_STOPPED;
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SetServiceStatus(engineInfo.hServiceStatus, &engineInfo.serviceStatus);
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}
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return;
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}
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