VirtualBoxClientImpl.cpp@ 66411

Last change on this file since 66411 was 66411, checked in by vboxsync, 8 years ago
VBox/Main: bugref:3300: VBoxSVC from terminal server session is not 'visible' - extended validation for VBoxSDS issues
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1	/* $Id: VirtualBoxClientImpl.cpp 66411 2017-04-03 21:09:37Z vboxsync $ */
2	/** @file
3	* VirtualBox COM class implementation
4	*/
5
6	/*
7	* Copyright (C) 2010-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.215389.xyz. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	#include "VirtualBoxClientImpl.h"
19
20	#include "AutoCaller.h"
21	#include "VBoxEvents.h"
22	#include "Logging.h"
23	#include "VBox/com/ErrorInfo.h"
24
25	#include <iprt/asm.h>
26	#include <iprt/thread.h>
27	#include <iprt/critsect.h>
28	#include <iprt/semaphore.h>
29	#include <iprt/cpp/utils.h>
30	#include <iprt/utf16.h>
31	#ifdef RT_OS_WINDOWS
32	# include <iprt/ldr.h>
33	# include <msi.h>
34	# include <WbemIdl.h>
35	#endif
36
37
38	/** Waiting time between probing whether VBoxSVC is alive. */
39	#define VBOXCLIENT_DEFAULT_INTERVAL 30000
40
41
42	/** Initialize instance counter class variable */
43	uint32_t VirtualBoxClient::g_cInstances = 0;
44
45	LONG VirtualBoxClient::s_cUnnecessaryAtlModuleLocks = 0;
46
47	// constructor / destructor
48	/////////////////////////////////////////////////////////////////////////////
49
50	HRESULT VirtualBoxClient::FinalConstruct()
51	{
52	HRESULT rc = init();
53	BaseFinalConstruct();
54	return rc;
55	}
56
57	void VirtualBoxClient::FinalRelease()
58	{
59	uninit();
60	BaseFinalRelease();
61	}
62
63
64	// public initializer/uninitializer for internal purposes only
65	/////////////////////////////////////////////////////////////////////////////
66
67	#ifdef VBOX_WITH_SDS
68
69	HRESULT CreateVirtualBoxThroughSDS(ComPtr<IVirtualBox> &aVirtualBox)
70	{
71	ComPtr<IVirtualBoxSDS> aVirtualBoxSDS;
72
73	HRESULT rc = CoCreateInstance(CLSID_VirtualBoxSDS, /* the VirtualBoxSDS object */
74	NULL, /* no aggregation */
75	CLSCTX_LOCAL_SERVER, /* the object lives in the current process */
76	IID_IVirtualBoxSDS, /* IID of the interface */
77	(void **)aVirtualBoxSDS.asOutParam());
78	if (FAILED(rc))
79	{
80	Assert(SUCCEEDED(rc));
81	return rc;
82	}
83
84	rc = aVirtualBoxSDS->get_VirtualBox(aVirtualBox.asOutParam());
85	if (FAILED(rc))
86	Assert(SUCCEEDED(rc));
87
88	return rc;
89	}
90
91	HRESULT ReleaseVirtualBoxThroughSDS()
92	{
93	ComPtr<IVirtualBoxSDS> aVirtualBoxSDS;
94
95	HRESULT rc = CoCreateInstance(CLSID_VirtualBoxSDS, /* the VirtualBoxSDS object */
96	NULL, /* no aggregation */
97	CLSCTX_LOCAL_SERVER, /* the object lives in the current process */
98	IID_IVirtualBoxSDS, /* IID of the interface */
99	(void **)aVirtualBoxSDS.asOutParam());
100	if (FAILED(rc))
101	{
102	LogRel(("ReleaseVirtualBox - instantiation of IVirtualBoxSDS failed, %x\n", rc));
103	Assert(SUCCEEDED(rc));
104	return rc;
105	}
106
107	rc = aVirtualBoxSDS->ReleaseVirtualBox();
108	if (FAILED(rc))
109	{
110	LogRel(("DeregisterVirtualBox() failed, %x\n", rc));
111	Assert(SUCCEEDED(rc));
112	}
113	return rc;
114	}
115
116
117	DWORD VirtualBoxClient::getServiceAccount(
118	const wchar_t* wszServiceName,
119	wchar_t* wszAccountName,
120	size_t cbAccountNameSize
121	)
122	{
123	SC_HANDLE schSCManager;
124	SC_HANDLE schService;
125	LPQUERY_SERVICE_CONFIG pSc = NULL;
126	DWORD dwBytesNeeded;
127	int dwError;
128
129	Assert(wszServiceName);
130	Assert(wszAccountName);
131	Assert(cbAccountNameSize);
132
133	// Get a handle to the SCM database.
134	schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
135	if (NULL == schSCManager)
136	{
137	dwError = GetLastError();
138	LogRel(("Error: could not open SCM: %Rhrc\n"));
139	return RTErrConvertFromWin32(dwError);
140	}
141
142	// Get a handle to the service.
143	schService = OpenService(schSCManager, wszServiceName, SERVICE_QUERY_CONFIG);
144	if (schService == NULL)
145	{
146	dwError = GetLastError();
147	CloseServiceHandle(schSCManager);
148	LogRel(("Error: Could not open service: %Rwc\n", dwError));
149	return RTErrConvertFromWin32(dwError);
150	}
151
152	// Get the configuration information.
153	if (!QueryServiceConfig(schService, NULL, 0, &dwBytesNeeded))
154	{
155	dwError = GetLastError();
156	if (ERROR_INSUFFICIENT_BUFFER == dwError)
157	{
158	pSc = (LPQUERY_SERVICE_CONFIG)malloc(dwBytesNeeded);
159	if (!pSc)
160	{
161	LogRel(("Error: allocating memory for service config, %Rwc\n", dwError));
162	CloseServiceHandle(schSCManager);
163	CloseServiceHandle(schService);
164	return RTErrConvertFromWin32(dwError);
165	}
166	if (!QueryServiceConfig(schService, pSc, dwBytesNeeded, &dwBytesNeeded))
167	{
168	dwError = GetLastError();
169	LogRel(("Error: error in querying service config, %Rwc\n", dwError));
170	free(pSc);
171	CloseServiceHandle(schService);
172	CloseServiceHandle(schSCManager);
173	return RTErrConvertFromWin32(dwError);
174	}
175	}
176	}
177
178	dwError = RTUtf16Copy((RTUTF16*)wszAccountName, cbAccountNameSize / sizeof(RTUTF16),
179	(RTUTF16*)pSc->lpServiceStartName);
180	if (RT_FAILURE(dwError))
181	{
182	LogRel(("Error: cannot copy account name to destination, %Rrc\n", dwError));
183	free(pSc);
184	CloseServiceHandle(schService);
185	CloseServiceHandle(schSCManager);
186	return RTErrConvertFromWin32(dwError);
187	}
188
189	free(pSc);
190	CloseServiceHandle(schService);
191	CloseServiceHandle(schSCManager);
192	return VINF_SUCCESS;
193	}
194
195
196	HRESULT VirtualBoxClient::isServiceDisabled(const wchar_t* wszServiceName, bool* pOutIsDisabled)
197	{
198	Assert(pOutIsDisabled);
199	Assert(wszServiceName);
200	ComPtr<IWbemLocator> aLocator;
201	ComPtr<IWbemServices> aService;
202
203	HRESULT hr = CoCreateInstance(CLSID_WbemLocator, 0,
204	CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *)aLocator.asOutParam());
205	if (FAILED(hr))
206	{
207	LogRel(("Error: Cannot instantiate WbemLocator: %Rhrc", hr));
208	return hr;
209	}
210
211	hr = aLocator->ConnectServer(
212	com::Bstr(L"ROOT\\CIMV2").raw(), // Object path of WMI namespace
213	NULL, // User name. NULL = current user
214	NULL, // User password. NULL = current
215	0, // Locale. NULL indicates current
216	NULL, // Security flags.
217	0, // Authority (for example, Kerberos)
218	0, // Context object
219	aService.asOutParam() // pointer to IWbemServices proxy
220	);
221	if (FAILED(hr))
222	{
223	LogRel(("Error: Cannot connect to Wbem Service: %Rhrc\n", hr));
224	return hr;
225	}
226
227	// query settings for VBoxSDS windows service
228	ComPtr<IEnumWbemClassObject> aEnumerator;
229	hr = aService->ExecQuery(
230	com::Bstr("WQL").raw(),
231	com::BstrFmt("SELECT * FROM Win32_Service WHERE Name='%ls'", wszServiceName).raw(),
232	WBEM_FLAG_FORWARD_ONLY \| WBEM_FLAG_RETURN_IMMEDIATELY,
233	NULL,
234	aEnumerator.asOutParam());
235	if (FAILED(hr) \|\| aEnumerator == NULL)
236	{
237	LogRel(("Error: querying service settings from WMI: %Rhrc\n", hr));
238	return hr;
239	}
240
241	ULONG uReturn = 0;
242	ComPtr<IWbemClassObject> aVBoxSDSObj;
243	hr = aEnumerator->Next(WBEM_INFINITE, 1, aVBoxSDSObj.asOutParam(), &uReturn);
244	if (FAILED(hr))
245	{
246	LogRel(("Error: Cannot get Service WMI record: %Rhrc\n", hr));
247	return hr;
248	}
249	if (aVBoxSDSObj == NULL \|\| uReturn == 0)
250	{
251	LogRel(("Error: Service record didn't exist in WMI: %Rhrc\n", hr));
252	return hr;
253	}
254
255	VARIANT vtProp;
256	VariantInit(&vtProp);
257
258	// Get "StartMode" property
259	hr = aVBoxSDSObj->Get(L"StartMode", 0, &vtProp, 0, 0);
260	if (FAILED(hr) \|\| (vtProp.vt & VT_NULL) == VT_NULL)
261	{
262	LogRel(("Error: Didn't found StartMode property: %Rhrc\n", hr));
263	return hr;
264	}
265
266	Assert((vtProp.vt & VT_BSTR) == VT_BSTR);
267
268	pOutIsDisabled = RTUtf16Cmp((RTUTF16)vtProp.bstrVal,
269	(RTUTF16*)L"Disabled") == 0;
270
271	LogRel(("Service start mode is '%ls' \n", vtProp.bstrVal));
272
273	VariantClear(&vtProp);
274
275	return S_OK;
276	}
277
278	#endif
279
280	/**
281	* Initializes the VirtualBoxClient object.
282	*
283	* @returns COM result indicator
284	*/
285	HRESULT VirtualBoxClient::init()
286	{
287
288	#ifdef VBOX_WITH_SDS
289	// setup COM Security to enable impersonation
290	// This works for console Virtual Box clients, GUI has own security settings
291	// For GUI Virtual Box it will be second call so can return TOO_LATE error
292	HRESULT hrGUICoInitializeSecurity = CoInitializeSecurity(NULL,
293	-1,
294	NULL,
295	NULL,
296	RPC_C_AUTHN_LEVEL_DEFAULT,
297	RPC_C_IMP_LEVEL_IMPERSONATE,
298	NULL,
299	EOAC_NONE,
300	NULL);
301	Assert(SUCCEEDED(hrGUICoInitializeSecurity) \|\| hrGUICoInitializeSecurity == RPC_E_TOO_LATE);
302	#endif
303
304	LogFlowThisFuncEnter();
305
306	/* Enclose the state transition NotReady->InInit->Ready */
307	AutoInitSpan autoInitSpan(this);
308	AssertReturn(autoInitSpan.isOk(), E_FAIL);
309
310	/* Important: DO NOT USE any kind of "early return" (except the single
311	* one above, checking the init span success) in this method. It is vital
312	* for correct error handling that it has only one point of return, which
313	* does all the magic on COM to signal object creation success and
314	* reporting the error later for every API method. COM translates any
315	* unsuccessful object creation to REGDB_E_CLASSNOTREG errors or similar
316	* unhelpful ones which cause us a lot of grief with troubleshooting. */
317
318	HRESULT rc = S_OK;
319	try
320	{
321	if (ASMAtomicIncU32(&g_cInstances) != 1)
322	AssertFailedStmt(throw setError(E_FAIL,
323	tr("Attempted to create more than one VirtualBoxClient instance")));
324
325	mData.m_ThreadWatcher = NIL_RTTHREAD;
326	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
327
328	#ifdef VBOX_WITH_SDS
329	// TODO: AM create virtual box through SDS
330	rc = CreateVirtualBoxThroughSDS(mData.m_pVirtualBox);
331	#else
332	rc = mData.m_pVirtualBox.createLocalObject(CLSID_VirtualBox);
333	#endif
334	if (FAILED(rc))
335	#ifdef RT_OS_WINDOWS
336	throw i_investigateVirtualBoxObjectCreationFailure(rc);
337	#else
338	throw rc;
339	#endif
340
341	/* VirtualBox error return is postponed to method calls, fetch it. */
342	ULONG rev;
343	rc = mData.m_pVirtualBox->COMGETTER(Revision)(&rev);
344	if (FAILED(rc))
345	throw rc;
346
347	rc = unconst(mData.m_pEventSource).createObject();
348	AssertComRCThrow(rc, setError(rc,
349	tr("Could not create EventSource for VirtualBoxClient")));
350	rc = mData.m_pEventSource->init();
351	AssertComRCThrow(rc, setError(rc,
352	tr("Could not initialize EventSource for VirtualBoxClient")));
353
354	/* HACK ALERT! This is for DllCanUnloadNow(). */
355	s_cUnnecessaryAtlModuleLocks++;
356	AssertMsg(s_cUnnecessaryAtlModuleLocks == 1, ("%d\n", s_cUnnecessaryAtlModuleLocks));
357
358	/* Setting up the VBoxSVC watcher thread. If anything goes wrong here it
359	* is not considered important enough to cause any sort of visible
360	* failure. The monitoring will not be done, but that's all. */
361	int vrc = RTSemEventCreate(&mData.m_SemEvWatcher);
362	if (RT_FAILURE(vrc))
363	{
364	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
365	AssertRCStmt(vrc, throw setError(VBOX_E_IPRT_ERROR,
366	tr("Failed to create semaphore (rc=%Rrc)"),
367	vrc));
368	}
369
370	vrc = RTThreadCreate(&mData.m_ThreadWatcher, SVCWatcherThread, this, 0,
371	RTTHREADTYPE_INFREQUENT_POLLER, RTTHREADFLAGS_WAITABLE, "VBoxSVCWatcher");
372	if (RT_FAILURE(vrc))
373	{
374	RTSemEventDestroy(mData.m_SemEvWatcher);
375	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
376	AssertRCStmt(vrc, throw setError(VBOX_E_IPRT_ERROR,
377	tr("Failed to create watcher thread (rc=%Rrc)"),
378	vrc));
379	}
380	}
381	catch (HRESULT err)
382	{
383	/* we assume that error info is set by the thrower */
384	rc = err;
385	}
386	catch (...)
387	{
388	rc = VirtualBoxBase::handleUnexpectedExceptions(this, RT_SRC_POS);
389	}
390
391	/* Confirm a successful initialization when it's the case. Must be last,
392	* as on failure it will uninitialize the object. */
393	if (SUCCEEDED(rc))
394	autoInitSpan.setSucceeded();
395	else
396	autoInitSpan.setFailed(rc);
397
398	LogFlowThisFunc(("rc=%Rhrc\n", rc));
399	LogFlowThisFuncLeave();
400	/* Unconditionally return success, because the error return is delayed to
401	* the attribute/method calls through the InitFailed object state. */
402	return S_OK;
403	}
404
405	#ifdef RT_OS_WINDOWS
406	/**
407	* Looks into why we failed to create the VirtualBox object.
408	*
409	* @returns hrcCaller thru setError.
410	* @param hrcCaller The failure status code.
411	*/
412	HRESULT VirtualBoxClient::i_investigateVirtualBoxObjectCreationFailure(HRESULT hrcCaller)
413	{
414	/*
415	* First step is to try get an IUnknown interface of the VirtualBox object.
416	*
417	* This will succeed even when oleaut32.msm (see @bugref{8016}, @ticketref{12087})
418	* is accidentally installed and messes up COM. It may also succeed when the COM
419	* registration is partially broken (though that's unlikely to happen these days).
420	*/
421	IUnknown *pUnknown = NULL;
422
423	#ifdef VBOX_WITH_SDS
424	// Check the VBOXSDS service running account name is SYSTEM
425	wchar_t wszBuffer[256];
426	int dwError = getServiceAccount(L"VBoxSDS", wszBuffer, sizeof(wszBuffer));
427	if(RT_FAILURE(dwError))
428	return setError(hrcCaller, tr("Failed to instantiate CLSID_VirtualBox using VBoxSDS: The VBoxSDS is unavailable: %Rwc"), dwError);
429
430	LogRelFunc(("VBoxSDS service is running under '%ls' account.\n", wszBuffer));
431
432	if(RTUtf16Cmp(L"LocalSystem", wszBuffer) != 0)
433	return setError(hrcCaller,
434	tr("VBoxSDS should be run under SYSTEM account, but it started under '%ls' account:\n"
435	"Change VBoxSDS Windows Service Logon parameters in Service Control Manager. \n%Rhrc"
436	), wszBuffer, hrcCaller);
437
438	bool bIsVBoxSDSDisabled = false;
439	HRESULT hrc = isServiceDisabled(L"VBoxSDS", &bIsVBoxSDSDisabled);
440	if (FAILED(hrc))
441	{
442	return setError(hrcCaller, tr("Failed to get information about VBoxSDS using WMI:: %Rhrc & %Rhrc"), hrcCaller, hrc);
443	}
444	if (bIsVBoxSDSDisabled)
445	{
446	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox using VBoxSDS: "
447	"VBoxSDS windows service disabled.\n"
448	"Enable VBoxSDS Windows Service using Windows Service Management Console.\n %Rhrc"), hrcCaller);
449	}
450
451	// Check the VBoxSDS windows service is enabled
452	ComPtr<IVirtualBox> aVirtualBox;
453	hrc = CreateVirtualBoxThroughSDS(aVirtualBox);
454	if (FAILED(hrc))
455	{
456	if (hrc == hrcCaller)
457	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox using VBoxSDS: %Rhrc"), hrcCaller);
458	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox using VBoxSDS: %Rhrc & %Rhrc"), hrcCaller, hrc);
459	}
460
461	hrc = aVirtualBox.queryInterfaceTo<IUnknown>(&pUnknown);
462	if (FAILED(hrc))
463	{
464	if (hrc == hrcCaller)
465	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox using VBoxSDS: %Rhrc"), hrcCaller);
466	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox using VBoxSDS: %Rhrc & %Rhrc"), hrcCaller, hrc);
467	}
468	#else
469	HRESULT hrc = CoCreateInstance(CLSID_VirtualBox, NULL, CLSCTX_LOCAL_SERVER, IID_IUnknown, (void **)&pUnknown);
470	if (FAILED(hrc))
471	{
472	if (hrc == hrcCaller)
473	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox: %Rhrc"), hrcCaller);
474	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox: %Rhrc & %Rhrc"), hrcCaller, hrc);
475	}
476	#endif
477
478	/*
479	* Try query the IVirtualBox interface (should fail), if it succeed we return
480	* straight away so we have more columns to spend on long messages below.
481	*/
482	IVirtualBox *pVirtualBox;
483	hrc = pUnknown->QueryInterface(IID_IVirtualBox, (void **)&pVirtualBox);
484	if (SUCCEEDED(hrc))
485	{
486	pVirtualBox->Release();
487	pUnknown->Release();
488	return setError(hrcCaller,
489	tr("Failed to instantiate CLSID_VirtualBox the first time, but worked when checking out why ... weird"));
490	}
491
492	/*
493	* Check for oleaut32.msm traces in the registry.
494	*/
495	HKEY hKey;
496	LSTATUS lrc = RegOpenKeyExW(HKEY_CLASSES_ROOT, L"CLSID\\{00020420-0000-0000-C000-000000000046}\\InprocServer32",
497	0 /fFlags/, KEY_QUERY_VALUE \| KEY_ENUMERATE_SUB_KEYS \| STANDARD_RIGHTS_READ, &hKey);
498	if (lrc == ERROR_SUCCESS)
499	{
500	wchar_t wszBuf[8192];
501	DWORD cbBuf = sizeof(wszBuf) - sizeof(wchar_t);
502	DWORD dwType = 0;
503	lrc = RegQueryValueExW(hKey, L"InprocServer32", NULL /pvReserved/, &dwType, (BYTE *)&wszBuf[0], &cbBuf);
504	if (lrc == ERROR_SUCCESS)
505	{
506	wszBuf[cbBuf / sizeof(wchar_t)] = '\0';
507	bool fSetError = false;
508
509	/*
510	* Try decode the string and improve the message.
511	*/
512	typedef UINT (WINAPI *PFNMSIDECOMPOSEDESCRIPTORW)(PCWSTR pwszDescriptor,
513	LPWSTR pwszProductCode /[40]/,
514	LPWSTR pwszFeatureId /[40]/,
515	LPWSTR pwszComponentCode /[40]/,
516	DWORD *poffArguments);
517	PFNMSIDECOMPOSEDESCRIPTORW pfnMsiDecomposeDescriptorW;
518	pfnMsiDecomposeDescriptorW = (PFNMSIDECOMPOSEDESCRIPTORW)RTLdrGetSystemSymbol("msi.dll", "MsiDecomposeDescriptorW");
519	if ( pfnMsiDecomposeDescriptorW
520	&& ( dwType == REG_SZ
521	\|\| dwType == REG_MULTI_SZ))
522	{
523	wchar_t wszProductCode[RTUUID_STR_LENGTH + 2 + 16] = { 0 };
524	wchar_t wszFeatureId[RTUUID_STR_LENGTH + 2 + 16] = { 0 };
525	wchar_t wszComponentCode[RTUUID_STR_LENGTH + 2 + 16] = { 0 };
526	DWORD offArguments = ~(DWORD)0;
527	UINT uRc = pfnMsiDecomposeDescriptorW(wszBuf, wszProductCode, wszFeatureId, wszComponentCode, &offArguments);
528	if (uRc == 0)
529	{
530	/*
531	* Can we resolve the product code into a name?
532	*/
533	typedef UINT (WINAPI PFNMSIOPENPRODUCTW)(PCWSTR, MSIHANDLE );
534	PFNMSIOPENPRODUCTW pfnMsiOpenProductW;
535	pfnMsiOpenProductW = (PFNMSIOPENPRODUCTW)RTLdrGetSystemSymbol("msi.dll", "MsiOpenProductW");
536
537	typedef UINT (WINAPI *PFNMSICLOSEHANDLE)(MSIHANDLE);
538	PFNMSICLOSEHANDLE pfnMsiCloseHandle;
539	pfnMsiCloseHandle = (PFNMSICLOSEHANDLE)RTLdrGetSystemSymbol("msi.dll", "MsiCloseHandle");
540
541	typedef UINT (WINAPI *PFNGETPRODUCTPROPERTYW)(MSIHANDLE, PCWSTR, PWSTR, PDWORD);
542	PFNGETPRODUCTPROPERTYW pfnMsiGetProductPropertyW;
543	pfnMsiGetProductPropertyW = (PFNGETPRODUCTPROPERTYW)RTLdrGetSystemSymbol("msi.dll", "MsiGetProductPropertyW");
544	if ( pfnMsiGetProductPropertyW
545	&& pfnMsiCloseHandle
546	&& pfnMsiOpenProductW)
547	{
548	MSIHANDLE hMsi = 0;
549	uRc = pfnMsiOpenProductW(wszProductCode, &hMsi);
550	if (uRc == 0)
551	{
552	static wchar_t const * const s_apwszProps[] =
553	{
554	INSTALLPROPERTY_INSTALLEDPRODUCTNAME,
555	INSTALLPROPERTY_PRODUCTNAME,
556	INSTALLPROPERTY_PACKAGENAME,
557	};
558
559	wchar_t wszProductName[1024];
560	DWORD cwcProductName;
561	unsigned i = 0;
562	do
563	{
564	cwcProductName = RT_ELEMENTS(wszProductName) - 1;
565	uRc = pfnMsiGetProductPropertyW(hMsi, s_apwszProps[i], wszProductName, &cwcProductName);
566	}
567	while ( ++i < RT_ELEMENTS(s_apwszProps)
568	&& ( uRc != 0
569	\|\| cwcProductName < 2
570	\|\| cwcProductName >= RT_ELEMENTS(wszProductName)) );
571	uRc = pfnMsiCloseHandle(hMsi);
572	if (uRc == 0 && cwcProductName >= 2)
573	{
574	wszProductName[RT_MIN(cwcProductName, RT_ELEMENTS(wszProductName) - 1)] = '\0';
575	setError(hrcCaller,
576	tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, but CLSID_VirtualBox w/ IUnknown works.\n"
577	"PSDispatch looks broken by the '%ls' (%ls) program, suspecting that it features the broken oleaut32.msm module as component %ls.\n"
578	"\n"
579	"We suggest you try uninstall '%ls'.\n"
580	"\n"
581	"See also https://support.microsoft.com/en-us/kb/316911 "),
582	wszProductName, wszProductCode, wszComponentCode, wszProductName);
583	fSetError = true;
584	}
585	}
586	}
587
588	/* MSI uses COM and may mess up our stuff. So, we wait with the fallback till afterwards in this case. */
589	if (!fSetError)
590	{
591	setError(hrcCaller,
592	tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, CLSID_VirtualBox w/ IUnknown works.\n"
593	"PSDispatch looks broken by installer %ls featuring the broken oleaut32.msm module as component %ls.\n"
594	"\n"
595	"See also https://support.microsoft.com/en-us/kb/316911 "),
596	wszProductCode, wszComponentCode);
597	fSetError = true;
598	}
599	}
600	}
601	if (!fSetError)
602	setError(hrcCaller, tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, CLSID_VirtualBox w/ IUnknown works.\n"
603	"PSDispatch looks broken by some installer featuring the broken oleaut32.msm module as a component.\n"
604	"\n"
605	"See also https://support.microsoft.com/en-us/kb/316911 "));
606	}
607	else if (lrc == ERROR_FILE_NOT_FOUND)
608	setError(hrcCaller, tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, but CLSID_VirtualBox w/ IUnknown works.\n"
609	"PSDispatch looks fine. Weird"));
610	else
611	setError(hrcCaller, tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, but CLSID_VirtualBox w/ IUnknown works.\n"
612	"Checking out PSDispatch registration ended with error: %u (%#x)"), lrc, lrc);
613	RegCloseKey(hKey);
614	}
615
616	pUnknown->Release();
617	return hrcCaller;
618	}
619	#endif /* RT_OS_WINDOWS */
620
621	/**
622	* Uninitializes the instance and sets the ready flag to FALSE.
623	* Called either from FinalRelease() or by the parent when it gets destroyed.
624	*/
625	void VirtualBoxClient::uninit()
626	{
627	LogFlowThisFunc(("\n"));
628
629	#ifdef VBOX_WITH_SDS
630	ReleaseVirtualBoxThroughSDS();
631	#endif
632
633	/* Enclose the state transition Ready->InUninit->NotReady */
634	AutoUninitSpan autoUninitSpan(this);
635	if (autoUninitSpan.uninitDone())
636	return;
637
638	if (mData.m_ThreadWatcher != NIL_RTTHREAD)
639	{
640	/* Signal the event semaphore and wait for the thread to terminate.
641	* if it hangs for some reason exit anyway, this can cause a crash
642	* though as the object will no longer be available. */
643	RTSemEventSignal(mData.m_SemEvWatcher);
644	RTThreadWait(mData.m_ThreadWatcher, 30000, NULL);
645	mData.m_ThreadWatcher = NIL_RTTHREAD;
646	RTSemEventDestroy(mData.m_SemEvWatcher);
647	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
648	}
649
650	mData.m_pVirtualBox.setNull();
651
652	ASMAtomicDecU32(&g_cInstances);
653	}
654
655	// IVirtualBoxClient properties
656	/////////////////////////////////////////////////////////////////////////////
657
658	/**
659	* Returns a reference to the VirtualBox object.
660	*
661	* @returns COM status code
662	* @param aVirtualBox Address of result variable.
663	*/
664	HRESULT VirtualBoxClient::getVirtualBox(ComPtr<IVirtualBox> &aVirtualBox)
665	{
666	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
667	aVirtualBox = mData.m_pVirtualBox;
668	return S_OK;
669	}
670
671	/**
672	* Create a new Session object and return a reference to it.
673	*
674	* @returns COM status code
675	* @param aSession Address of result variable.
676	*/
677	HRESULT VirtualBoxClient::getSession(ComPtr<ISession> &aSession)
678	{
679	/* this is not stored in this object, no need to lock */
680	ComPtr<ISession> pSession;
681	HRESULT rc = pSession.createInprocObject(CLSID_Session);
682	if (SUCCEEDED(rc))
683	aSession = pSession;
684	return rc;
685	}
686
687	/**
688	* Return reference to the EventSource associated with this object.
689	*
690	* @returns COM status code
691	* @param aEventSource Address of result variable.
692	*/
693	HRESULT VirtualBoxClient::getEventSource(ComPtr<IEventSource> &aEventSource)
694	{
695	/* this is const, no need to lock */
696	aEventSource = mData.m_pEventSource;
697	return aEventSource.isNull() ? E_FAIL : S_OK;
698	}
699
700	// IVirtualBoxClient methods
701	/////////////////////////////////////////////////////////////////////////////
702
703	/**
704	* Checks a Machine object for any pending errors.
705	*
706	* @returns COM status code
707	* @param aMachine Machine object to check.
708	*/
709	HRESULT VirtualBoxClient::checkMachineError(const ComPtr<IMachine> &aMachine)
710	{
711	BOOL fAccessible = FALSE;
712	HRESULT rc = aMachine->COMGETTER(Accessible)(&fAccessible);
713	if (FAILED(rc))
714	return setError(rc, tr("Could not check the accessibility status of the VM"));
715	else if (!fAccessible)
716	{
717	ComPtr<IVirtualBoxErrorInfo> pAccessError;
718	rc = aMachine->COMGETTER(AccessError)(pAccessError.asOutParam());
719	if (FAILED(rc))
720	return setError(rc, tr("Could not get the access error message of the VM"));
721	else
722	{
723	ErrorInfo info(pAccessError);
724	ErrorInfoKeeper eik(info);
725	return info.getResultCode();
726	}
727	}
728	return S_OK;
729	}
730
731	// private methods
732	/////////////////////////////////////////////////////////////////////////////
733
734
735	// TODO: AM Add pinging of VBoxSDS
736	/static/
737	DECLCALLBACK(int) VirtualBoxClient::SVCWatcherThread(RTTHREAD ThreadSelf,
738	void *pvUser)
739	{
740	NOREF(ThreadSelf);
741	Assert(pvUser);
742	VirtualBoxClient pThis = (VirtualBoxClient )pvUser;
743	RTSEMEVENT sem = pThis->mData.m_SemEvWatcher;
744	RTMSINTERVAL cMillies = VBOXCLIENT_DEFAULT_INTERVAL;
745	int vrc;
746
747	/* The likelihood of early crashes are high, so start with a short wait. */
748	vrc = RTSemEventWait(sem, cMillies / 2);
749
750	/* As long as the waiting times out keep retrying the wait. */
751	while (RT_FAILURE(vrc))
752	{
753	{
754	HRESULT rc = S_OK;
755	ComPtr<IVirtualBox> pV;
756	{
757	AutoReadLock alock(pThis COMMA_LOCKVAL_SRC_POS);
758	pV = pThis->mData.m_pVirtualBox;
759	}
760	if (!pV.isNull())
761	{
762	ULONG rev;
763	rc = pV->COMGETTER(Revision)(&rev);
764	if (FAILED_DEAD_INTERFACE(rc))
765	{
766	LogRel(("VirtualBoxClient: detected unresponsive VBoxSVC (rc=%Rhrc)\n", rc));
767	{
768	AutoWriteLock alock(pThis COMMA_LOCKVAL_SRC_POS);
769	/* Throw away the VirtualBox reference, it's no longer
770	* usable as VBoxSVC terminated in the mean time. */
771	pThis->mData.m_pVirtualBox.setNull();
772	}
773	fireVBoxSVCAvailabilityChangedEvent(pThis->mData.m_pEventSource, FALSE);
774	}
775	}
776	else
777	{
778	/* Try to get a new VirtualBox reference straight away, and if
779	* this fails use an increased waiting time as very frequent
780	* restart attempts in some wedged config can cause high CPU
781	* and disk load. */
782	ComPtr<IVirtualBox> pVirtualBox;
783	rc = pVirtualBox.createLocalObject(CLSID_VirtualBox);
784	if (FAILED(rc))
785	cMillies = 3 * VBOXCLIENT_DEFAULT_INTERVAL;
786	else
787	{
788	LogRel(("VirtualBoxClient: detected working VBoxSVC (rc=%Rhrc)\n", rc));
789	{
790	AutoWriteLock alock(pThis COMMA_LOCKVAL_SRC_POS);
791	/* Update the VirtualBox reference, there's a working
792	* VBoxSVC again from now on. */
793	pThis->mData.m_pVirtualBox = pVirtualBox;
794	}
795	fireVBoxSVCAvailabilityChangedEvent(pThis->mData.m_pEventSource, TRUE);
796	cMillies = VBOXCLIENT_DEFAULT_INTERVAL;
797	}
798	}
799	}
800	vrc = RTSemEventWait(sem, cMillies);
801	}
802	return 0;
803	}
804
805	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-client/VirtualBoxClientImpl.cpp@ 66411

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