VirtualBoxClientImpl.cpp@ 94267

Last change on this file since 94267 was 93115, checked in by vboxsync, 3 years ago
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1	/* $Id: VirtualBoxClientImpl.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* VirtualBox COM class implementation
4	*/
5
6	/*
7	* Copyright (C) 2010-2022 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. 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	#define LOG_GROUP LOG_GROUP_MAIN_VIRTUALBOXCLIENT
19	#include "LoggingNew.h"
20
21	#include "VirtualBoxClientImpl.h"
22
23	#include "AutoCaller.h"
24	#include "VBoxEvents.h"
25	#include "VBox/com/ErrorInfo.h"
26	#include "VBox/com/listeners.h"
27
28	#include <iprt/asm.h>
29	#include <iprt/thread.h>
30	#include <iprt/critsect.h>
31	#include <iprt/path.h>
32	#include <iprt/semaphore.h>
33	#include <iprt/cpp/utils.h>
34	#include <iprt/utf16.h>
35	#ifdef RT_OS_WINDOWS
36	# include <iprt/err.h>
37	# include <iprt/ldr.h>
38	# include <msi.h>
39	# include <WbemIdl.h>
40	#endif
41
42	#include <new>
43
44
45	/** Waiting time between probing whether VBoxSVC is alive. */
46	#define VBOXCLIENT_DEFAULT_INTERVAL 30000
47
48
49	/** Initialize instance counter class variable */
50	uint32_t VirtualBoxClient::g_cInstances = 0;
51
52	LONG VirtualBoxClient::s_cUnnecessaryAtlModuleLocks = 0;
53
54	#ifdef VBOX_WITH_MAIN_NLS
55
56	/* listener class for language updates */
57	class VBoxEventListener
58	{
59	public:
60	VBoxEventListener()
61	{}
62
63
64	HRESULT init(void *)
65	{
66	return S_OK;
67	}
68
69	HRESULT init()
70	{
71	return S_OK;
72	}
73
74	void uninit()
75	{
76	}
77
78	virtual ~VBoxEventListener()
79	{
80	}
81
82	STDMETHOD(HandleEvent)(VBoxEventType_T aType, IEvent *aEvent)
83	{
84	switch(aType)
85	{
86	case VBoxEventType_OnLanguageChanged:
87	{
88	/*
89	* Proceed with uttmost care as we might be racing com::Shutdown()
90	* and have the ground open up beneath us.
91	*/
92	LogFunc(("VBoxEventType_OnLanguageChanged\n"));
93	VirtualBoxTranslator *pTranslator = VirtualBoxTranslator::tryInstance();
94	if (pTranslator)
95	{
96	ComPtr<ILanguageChangedEvent> pEvent = aEvent;
97	Assert(pEvent);
98
99	/* This call may fail if we're racing COM shutdown. */
100	com::Bstr bstrLanguageId;
101	HRESULT hrc = pEvent->COMGETTER(LanguageId)(bstrLanguageId.asOutParam());
102	if (SUCCEEDED(hrc))
103	{
104	try
105	{
106	com::Utf8Str strLanguageId(bstrLanguageId);
107	LogFunc(("New language ID: %s\n", strLanguageId.c_str()));
108	pTranslator->i_loadLanguage(strLanguageId.c_str());
109	}
110	catch (std::bad_alloc &)
111	{
112	LogFunc(("Caught bad_alloc"));
113	}
114	}
115	else
116	LogFunc(("Failed to get new language ID: %Rhrc\n", hrc));
117
118	pTranslator->release();
119	}
120	break;
121	}
122
123	default:
124	AssertFailed();
125	}
126
127	return S_OK;
128	}
129	};
130
131	typedef ListenerImpl<VBoxEventListener> VBoxEventListenerImpl;
132
133	VBOX_LISTENER_DECLARE(VBoxEventListenerImpl)
134
135	#endif /* VBOX_WITH_MAIN_NLS */
136
137	// constructor / destructor
138	/////////////////////////////////////////////////////////////////////////////
139
140	/** @relates VirtualBoxClient::FinalConstruct() */
141	HRESULT VirtualBoxClient::FinalConstruct()
142	{
143	HRESULT rc = init();
144	BaseFinalConstruct();
145	return rc;
146	}
147
148	void VirtualBoxClient::FinalRelease()
149	{
150	uninit();
151	BaseFinalRelease();
152	}
153
154
155	// public initializer/uninitializer for internal purposes only
156	/////////////////////////////////////////////////////////////////////////////
157
158	/**
159	* Initializes the VirtualBoxClient object.
160	*
161	* @returns COM result indicator
162	*/
163	HRESULT VirtualBoxClient::init()
164	{
165	LogFlowThisFuncEnter();
166
167	/* Enclose the state transition NotReady->InInit->Ready */
168	AutoInitSpan autoInitSpan(this);
169	AssertReturn(autoInitSpan.isOk(), E_FAIL);
170
171	/* Important: DO NOT USE any kind of "early return" (except the single
172	* one above, checking the init span success) in this method. It is vital
173	* for correct error handling that it has only one point of return, which
174	* does all the magic on COM to signal object creation success and
175	* reporting the error later for every API method. COM translates any
176	* unsuccessful object creation to REGDB_E_CLASSNOTREG errors or similar
177	* unhelpful ones which cause us a lot of grief with troubleshooting. */
178
179	HRESULT rc = S_OK;
180	try
181	{
182	if (ASMAtomicIncU32(&g_cInstances) != 1)
183	AssertFailedStmt(throw setError(E_FAIL, "Attempted to create more than one VirtualBoxClient instance"));
184
185	mData.m_ThreadWatcher = NIL_RTTHREAD;
186	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
187
188	rc = mData.m_pVirtualBox.createLocalObject(CLSID_VirtualBox);
189	if (FAILED(rc))
190	#ifdef RT_OS_WINDOWS
191	throw i_investigateVirtualBoxObjectCreationFailure(rc);
192	#else
193	throw rc;
194	#endif
195
196	/* VirtualBox error return is postponed to method calls, fetch it. */
197	ULONG rev;
198	rc = mData.m_pVirtualBox->COMGETTER(Revision)(&rev);
199	if (FAILED(rc))
200	throw rc;
201
202	rc = unconst(mData.m_pEventSource).createObject();
203	AssertComRCThrow(rc, setError(rc, "Could not create EventSource for VirtualBoxClient"));
204	rc = mData.m_pEventSource->init();
205	AssertComRCThrow(rc, setError(rc, "Could not initialize EventSource for VirtualBoxClient"));
206
207	/* HACK ALERT! This is for DllCanUnloadNow(). */
208	s_cUnnecessaryAtlModuleLocks++;
209	AssertMsg(s_cUnnecessaryAtlModuleLocks == 1, ("%d\n", s_cUnnecessaryAtlModuleLocks));
210
211	int vrc;
212	#ifdef VBOX_WITH_MAIN_NLS
213	/* Create the translator singelton (must work) and try load translations (non-fatal). */
214	mData.m_pVBoxTranslator = VirtualBoxTranslator::instance();
215	if (mData.m_pVBoxTranslator == NULL)
216	throw setError(VBOX_E_IPRT_ERROR, "Failed to create translator instance");
217
218	char szNlsPath[RTPATH_MAX];
219	vrc = RTPathAppPrivateNoArch(szNlsPath, sizeof(szNlsPath));
220	if (RT_SUCCESS(vrc))
221	vrc = RTPathAppend(szNlsPath, sizeof(szNlsPath), "nls" RTPATH_SLASH_STR "VirtualBoxAPI");
222
223	if (RT_SUCCESS(vrc))
224	{
225	vrc = mData.m_pVBoxTranslator->registerTranslation(szNlsPath, true, &mData.m_pTrComponent);
226	if (RT_SUCCESS(vrc))
227	{
228	rc = i_reloadApiLanguage();
229	if (SUCCEEDED(rc))
230	i_registerEventListener(); /* for updates */
231	else
232	LogRelFunc(("i_reloadApiLanguage failed: %Rhrc\n", rc));
233	}
234	else
235	LogRelFunc(("Register translation failed: %Rrc\n", vrc));
236	}
237	else
238	LogRelFunc(("Path constructing failed: %Rrc\n", vrc));
239	#endif
240	/* Setting up the VBoxSVC watcher thread. If anything goes wrong here it
241	* is not considered important enough to cause any sort of visible
242	* failure. The monitoring will not be done, but that's all. */
243	vrc = RTSemEventCreate(&mData.m_SemEvWatcher);
244	if (RT_FAILURE(vrc))
245	{
246	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
247	AssertRCStmt(vrc, throw setErrorBoth(VBOX_E_IPRT_ERROR, vrc, tr("Failed to create semaphore (rc=%Rrc)"), vrc));
248	}
249
250	vrc = RTThreadCreate(&mData.m_ThreadWatcher, SVCWatcherThread, this, 0,
251	RTTHREADTYPE_INFREQUENT_POLLER, RTTHREADFLAGS_WAITABLE, "VBoxSVCWatcher");
252	if (RT_FAILURE(vrc))
253	{
254	RTSemEventDestroy(mData.m_SemEvWatcher);
255	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
256	AssertRCStmt(vrc, throw setErrorBoth(VBOX_E_IPRT_ERROR, vrc, tr("Failed to create watcher thread (rc=%Rrc)"), vrc));
257	}
258	}
259	catch (HRESULT err)
260	{
261	/* we assume that error info is set by the thrower */
262	rc = err;
263	}
264	catch (...)
265	{
266	rc = VirtualBoxBase::handleUnexpectedExceptions(this, RT_SRC_POS);
267	}
268
269	/* Confirm a successful initialization when it's the case. Must be last,
270	* as on failure it will uninitialize the object. */
271	if (SUCCEEDED(rc))
272	autoInitSpan.setSucceeded();
273	else
274	autoInitSpan.setFailed(rc);
275
276	LogFlowThisFunc(("rc=%Rhrc\n", rc));
277	LogFlowThisFuncLeave();
278	/* Unconditionally return success, because the error return is delayed to
279	* the attribute/method calls through the InitFailed object state. */
280	return S_OK;
281	}
282
283	#ifdef RT_OS_WINDOWS
284
285	/**
286	* Looks into why we failed to create the VirtualBox object.
287	*
288	* @returns hrcCaller thru setError.
289	* @param hrcCaller The failure status code.
290	*/
291	HRESULT VirtualBoxClient::i_investigateVirtualBoxObjectCreationFailure(HRESULT hrcCaller)
292	{
293	HRESULT hrc;
294
295	# ifdef VBOX_WITH_SDS
296	/*
297	* Check that the VBoxSDS service is configured to run as LocalSystem and is enabled.
298	*/
299	WCHAR wszBuffer[256];
300	uint32_t uStartType;
301	int vrc = i_getServiceAccountAndStartType(L"VBoxSDS", wszBuffer, RT_ELEMENTS(wszBuffer), &uStartType);
302	if (RT_SUCCESS(vrc))
303	{
304	LogRelFunc(("VBoxSDS service is running under the '%ls' account with start type %u.\n", wszBuffer, uStartType));
305	if (RTUtf16Cmp(wszBuffer, L"LocalSystem") != 0)
306	return setError(hrcCaller,
307	tr("VBoxSDS is misconfigured to run under the '%ls' account instead of the SYSTEM one.\n"
308	"Reinstall VirtualBox to fix it. Alternatively you can fix it using the Windows Service Control "
309	"Manager or by running 'sc config VBoxSDS obj=LocalSystem' on a command line."), wszBuffer);
310	if (uStartType == SERVICE_DISABLED)
311	return setError(hrcCaller,
312	tr("The VBoxSDS windows service is disabled.\n"
313	"Reinstall VirtualBox to fix it. Alternatively try reenable the service by setting it to "
314	" 'Manual' startup type in the Windows Service management console, or by runing "
315	"'sc config VBoxSDS start=demand' on the command line."));
316	}
317	else if (vrc == VERR_NOT_FOUND)
318	return setError(hrcCaller,
319	tr("The VBoxSDS windows service was not found.\n"
320	"Reinstall VirtualBox to fix it. Alternatively you can try start VirtualBox as Administrator, this "
321	"should automatically reinstall the service, or you can run "
322	"'VBoxSDS.exe --regservice' command from an elevated Administrator command line."));
323	else
324	LogRelFunc(("VirtualBoxClient::i_getServiceAccount failed: %Rrc\n", vrc));
325	# endif
326
327	/*
328	* First step is to try get an IUnknown interface of the VirtualBox object.
329	*
330	* This will succeed even when oleaut32.msm (see @bugref{8016}, @ticketref{12087})
331	* is accidentally installed and messes up COM. It may also succeed when the COM
332	* registration is partially broken (though that's unlikely to happen these days).
333	*/
334	IUnknown *pUnknown = NULL;
335	hrc = CoCreateInstance(CLSID_VirtualBox, NULL, CLSCTX_LOCAL_SERVER, IID_IUnknown, (void **)&pUnknown);
336	if (FAILED(hrc))
337	{
338	if (hrc == hrcCaller)
339	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox: %Rhrc"), hrcCaller);
340	return setError(hrcCaller, tr("Completely failed to instantiate CLSID_VirtualBox: %Rhrc & %Rhrc"), hrcCaller, hrc);
341	}
342
343	/*
344	* Try query the IVirtualBox interface (should fail), if it succeed we return
345	* straight away so we have more columns to spend on long messages below.
346	*/
347	IVirtualBox *pVirtualBox;
348	hrc = pUnknown->QueryInterface(IID_IVirtualBox, (void **)&pVirtualBox);
349	if (SUCCEEDED(hrc))
350	{
351	pVirtualBox->Release();
352	pUnknown->Release();
353	return setError(hrcCaller,
354	tr("Failed to instantiate CLSID_VirtualBox the first time, but worked when checking out why ... weird"));
355	}
356
357	/*
358	* Check for oleaut32.msm traces in the registry.
359	*/
360	HKEY hKey;
361	LSTATUS lrc = RegOpenKeyExW(HKEY_CLASSES_ROOT, L"CLSID\\{00020420-0000-0000-C000-000000000046}\\InprocServer32",
362	0 /fFlags/, KEY_QUERY_VALUE \| KEY_ENUMERATE_SUB_KEYS \| STANDARD_RIGHTS_READ, &hKey);
363	if (lrc == ERROR_SUCCESS)
364	{
365	wchar_t wszBuf[8192];
366	DWORD cbBuf = sizeof(wszBuf) - sizeof(wchar_t);
367	DWORD dwType = 0;
368	lrc = RegQueryValueExW(hKey, L"InprocServer32", NULL /pvReserved/, &dwType, (BYTE *)&wszBuf[0], &cbBuf);
369	if (lrc == ERROR_SUCCESS)
370	{
371	wszBuf[cbBuf / sizeof(wchar_t)] = '\0';
372	bool fSetError = false;
373
374	/*
375	* Try decode the string and improve the message.
376	*/
377	typedef UINT (WINAPI *PFNMSIDECOMPOSEDESCRIPTORW)(PCWSTR pwszDescriptor,
378	LPWSTR pwszProductCode /[40]/,
379	LPWSTR pwszFeatureId /[40]/,
380	LPWSTR pwszComponentCode /[40]/,
381	DWORD *poffArguments);
382	PFNMSIDECOMPOSEDESCRIPTORW pfnMsiDecomposeDescriptorW;
383	pfnMsiDecomposeDescriptorW = (PFNMSIDECOMPOSEDESCRIPTORW)RTLdrGetSystemSymbol("msi.dll", "MsiDecomposeDescriptorW");
384	if ( pfnMsiDecomposeDescriptorW
385	&& ( dwType == REG_SZ
386	\|\| dwType == REG_MULTI_SZ))
387	{
388	wchar_t wszProductCode[RTUUID_STR_LENGTH + 2 + 16] = { 0 };
389	wchar_t wszFeatureId[RTUUID_STR_LENGTH + 2 + 16] = { 0 };
390	wchar_t wszComponentCode[RTUUID_STR_LENGTH + 2 + 16] = { 0 };
391	DWORD offArguments = ~(DWORD)0;
392	UINT uRc = pfnMsiDecomposeDescriptorW(wszBuf, wszProductCode, wszFeatureId, wszComponentCode, &offArguments);
393	if (uRc == 0)
394	{
395	/*
396	* Can we resolve the product code into a name?
397	*/
398	typedef UINT (WINAPI PFNMSIOPENPRODUCTW)(PCWSTR, MSIHANDLE );
399	PFNMSIOPENPRODUCTW pfnMsiOpenProductW;
400	pfnMsiOpenProductW = (PFNMSIOPENPRODUCTW)RTLdrGetSystemSymbol("msi.dll", "MsiOpenProductW");
401
402	typedef UINT (WINAPI *PFNMSICLOSEHANDLE)(MSIHANDLE);
403	PFNMSICLOSEHANDLE pfnMsiCloseHandle;
404	pfnMsiCloseHandle = (PFNMSICLOSEHANDLE)RTLdrGetSystemSymbol("msi.dll", "MsiCloseHandle");
405
406	typedef UINT (WINAPI *PFNGETPRODUCTPROPERTYW)(MSIHANDLE, PCWSTR, PWSTR, PDWORD);
407	PFNGETPRODUCTPROPERTYW pfnMsiGetProductPropertyW;
408	pfnMsiGetProductPropertyW = (PFNGETPRODUCTPROPERTYW)RTLdrGetSystemSymbol("msi.dll", "MsiGetProductPropertyW");
409	if ( pfnMsiGetProductPropertyW
410	&& pfnMsiCloseHandle
411	&& pfnMsiOpenProductW)
412	{
413	MSIHANDLE hMsi = 0;
414	uRc = pfnMsiOpenProductW(wszProductCode, &hMsi);
415	if (uRc == 0)
416	{
417	static wchar_t const * const s_apwszProps[] =
418	{
419	INSTALLPROPERTY_INSTALLEDPRODUCTNAME,
420	INSTALLPROPERTY_PRODUCTNAME,
421	INSTALLPROPERTY_PACKAGENAME,
422	};
423
424	wchar_t wszProductName[1024];
425	DWORD cwcProductName;
426	unsigned i = 0;
427	do
428	{
429	cwcProductName = RT_ELEMENTS(wszProductName) - 1;
430	uRc = pfnMsiGetProductPropertyW(hMsi, s_apwszProps[i], wszProductName, &cwcProductName);
431	}
432	while ( ++i < RT_ELEMENTS(s_apwszProps)
433	&& ( uRc != 0
434	\|\| cwcProductName < 2
435	\|\| cwcProductName >= RT_ELEMENTS(wszProductName)) );
436	uRc = pfnMsiCloseHandle(hMsi);
437	if (uRc == 0 && cwcProductName >= 2)
438	{
439	wszProductName[RT_MIN(cwcProductName, RT_ELEMENTS(wszProductName) - 1)] = '\0';
440	setError(hrcCaller,
441	tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, but CLSID_VirtualBox w/ IUnknown works.\n"
442	"PSDispatch looks broken by the '%ls' (%ls) program, suspecting that it features the broken oleaut32.msm module as component %ls.\n"
443	"\n"
444	"We suggest you try uninstall '%ls'.\n"
445	"\n"
446	"See also https://support.microsoft.com/en-us/kb/316911 "),
447	wszProductName, wszProductCode, wszComponentCode, wszProductName);
448	fSetError = true;
449	}
450	}
451	}
452
453	/* MSI uses COM and may mess up our stuff. So, we wait with the fallback till afterwards in this case. */
454	if (!fSetError)
455	{
456	setError(hrcCaller,
457	tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, CLSID_VirtualBox w/ IUnknown works.\n"
458	"PSDispatch looks broken by installer %ls featuring the broken oleaut32.msm module as component %ls.\n"
459	"\n"
460	"See also https://support.microsoft.com/en-us/kb/316911 "),
461	wszProductCode, wszComponentCode);
462	fSetError = true;
463	}
464	}
465	}
466	if (!fSetError)
467	setError(hrcCaller, tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, CLSID_VirtualBox w/ IUnknown works.\n"
468	"PSDispatch looks broken by some installer featuring the broken oleaut32.msm module as a component.\n"
469	"\n"
470	"See also https://support.microsoft.com/en-us/kb/316911 "));
471	}
472	else if (lrc == ERROR_FILE_NOT_FOUND)
473	setError(hrcCaller, tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, but CLSID_VirtualBox w/ IUnknown works.\n"
474	"PSDispatch looks fine. Weird"));
475	else
476	setError(hrcCaller, tr("Failed to instantiate CLSID_VirtualBox w/ IVirtualBox, but CLSID_VirtualBox w/ IUnknown works.\n"
477	"Checking out PSDispatch registration ended with error: %u (%#x)"), lrc, lrc);
478	RegCloseKey(hKey);
479	}
480
481	pUnknown->Release();
482	return hrcCaller;
483	}
484
485	# ifdef VBOX_WITH_SDS
486	/**
487	* Gets the service account name and start type for the given service.
488	*
489	* @returns IPRT status code (for some reason).
490	* @param pwszServiceName The name of the service.
491	* @param pwszAccountName Where to return the account name.
492	* @param cwcAccountName The length of the account name buffer (in WCHARs).
493	* @param puStartType Where to return the start type.
494	*/
495	int VirtualBoxClient::i_getServiceAccountAndStartType(const wchar_t *pwszServiceName,
496	wchar_t pwszAccountName, size_t cwcAccountName, uint32_t puStartType)
497	{
498	AssertPtr(pwszServiceName);
499	AssertPtr(pwszAccountName);
500	Assert(cwcAccountName);
501	*pwszAccountName = '\0';
502	*puStartType = SERVICE_DEMAND_START;
503
504	int vrc;
505
506	// Get a handle to the SCM database.
507	SC_HANDLE hSCManager = OpenSCManagerW(NULL /pwszMachineName/, NULL /pwszDatabaseName/, SC_MANAGER_CONNECT);
508	if (hSCManager != NULL)
509	{
510	SC_HANDLE hService = OpenServiceW(hSCManager, pwszServiceName, SERVICE_QUERY_CONFIG);
511	if (hService != NULL)
512	{
513	DWORD cbNeeded = sizeof(QUERY_SERVICE_CONFIGW) + _1K;
514	if (!QueryServiceConfigW(hService, NULL, 0, &cbNeeded))
515	{
516	Assert(GetLastError() == ERROR_INSUFFICIENT_BUFFER);
517	LPQUERY_SERVICE_CONFIGW pSc = (LPQUERY_SERVICE_CONFIGW)RTMemTmpAllocZ(cbNeeded + _1K);
518	if (pSc)
519	{
520	DWORD cbNeeded2 = 0;
521	if (QueryServiceConfigW(hService, pSc, cbNeeded + _1K, &cbNeeded2))
522	{
523	*puStartType = pSc->dwStartType;
524	vrc = RTUtf16Copy(pwszAccountName, cwcAccountName, pSc->lpServiceStartName);
525	if (RT_FAILURE(vrc))
526	LogRel(("Error: SDS service name is too long (%Rrc): %ls\n", vrc, pSc->lpServiceStartName));
527	}
528	else
529	{
530	int dwError = GetLastError();
531	vrc = RTErrConvertFromWin32(dwError);
532	LogRel(("Error: Failed querying '%ls' service config: %Rwc (%u) -> %Rrc; cbNeeded=%d cbNeeded2=%d\n",
533	pwszServiceName, dwError, dwError, vrc, cbNeeded, cbNeeded2));
534	}
535	RTMemTmpFree(pSc);
536	}
537	else
538	{
539	LogRel(("Error: Failed allocating %#x bytes of memory for service config!\n", cbNeeded + _1K));
540	vrc = VERR_NO_TMP_MEMORY;
541	}
542	}
543	else
544	{
545	AssertLogRelMsgFailed(("Error: QueryServiceConfigW returns success with zero buffer!\n"));
546	vrc = VERR_IPE_UNEXPECTED_STATUS;
547	}
548	CloseServiceHandle(hService);
549	}
550	else
551	{
552	int dwError = GetLastError();
553	vrc = RTErrConvertFromWin32(dwError);
554	LogRel(("Error: Could not open service '%ls': %Rwc (%u) -> %Rrc\n", pwszServiceName, dwError, dwError, vrc));
555	}
556	CloseServiceHandle(hSCManager);
557	}
558	else
559	{
560	int dwError = GetLastError();
561	vrc = RTErrConvertFromWin32(dwError);
562	LogRel(("Error: Could not open SCM: %Rwc (%u) -> %Rrc\n", dwError, dwError, vrc));
563	}
564	return vrc;
565	}
566	# endif /* VBOX_WITH_SDS */
567
568	#endif /* RT_OS_WINDOWS */
569
570	/**
571	* Uninitializes the instance and sets the ready flag to FALSE.
572	* Called either from FinalRelease() or by the parent when it gets destroyed.
573	*/
574	void VirtualBoxClient::uninit()
575	{
576	LogFlowThisFunc(("\n"));
577
578	/* Enclose the state transition Ready->InUninit->NotReady */
579	AutoUninitSpan autoUninitSpan(this);
580	if (autoUninitSpan.uninitDone())
581	{
582	LogFlowThisFunc(("already done\n"));
583	return;
584	}
585
586	#ifdef VBOX_WITH_MAIN_NLS
587	i_unregisterEventListener();
588	#endif
589
590	if (mData.m_ThreadWatcher != NIL_RTTHREAD)
591	{
592	/* Signal the event semaphore and wait for the thread to terminate.
593	* if it hangs for some reason exit anyway, this can cause a crash
594	* though as the object will no longer be available. */
595	RTSemEventSignal(mData.m_SemEvWatcher);
596	RTThreadWait(mData.m_ThreadWatcher, 30000, NULL);
597	mData.m_ThreadWatcher = NIL_RTTHREAD;
598	RTSemEventDestroy(mData.m_SemEvWatcher);
599	mData.m_SemEvWatcher = NIL_RTSEMEVENT;
600	}
601	#ifdef VBOX_WITH_MAIN_NLS
602	if (mData.m_pVBoxTranslator != NULL)
603	{
604	mData.m_pVBoxTranslator->release();
605	mData.m_pVBoxTranslator = NULL;
606	mData.m_pTrComponent = NULL;
607	}
608	#endif
609	mData.m_pToken.setNull();
610	mData.m_pVirtualBox.setNull();
611
612	ASMAtomicDecU32(&g_cInstances);
613
614	LogFlowThisFunc(("returns\n"));
615	}
616
617	// IVirtualBoxClient properties
618	/////////////////////////////////////////////////////////////////////////////
619
620	/**
621	* Returns a reference to the VirtualBox object.
622	*
623	* @returns COM status code
624	* @param aVirtualBox Address of result variable.
625	*/
626	HRESULT VirtualBoxClient::getVirtualBox(ComPtr<IVirtualBox> &aVirtualBox)
627	{
628	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
629	aVirtualBox = mData.m_pVirtualBox;
630	return S_OK;
631	}
632
633	/**
634	* Create a new Session object and return a reference to it.
635	*
636	* @returns COM status code
637	* @param aSession Address of result variable.
638	*/
639	HRESULT VirtualBoxClient::getSession(ComPtr<ISession> &aSession)
640	{
641	/* this is not stored in this object, no need to lock */
642	ComPtr<ISession> pSession;
643	HRESULT rc = pSession.createInprocObject(CLSID_Session);
644	if (SUCCEEDED(rc))
645	aSession = pSession;
646	return rc;
647	}
648
649	/**
650	* Return reference to the EventSource associated with this object.
651	*
652	* @returns COM status code
653	* @param aEventSource Address of result variable.
654	*/
655	HRESULT VirtualBoxClient::getEventSource(ComPtr<IEventSource> &aEventSource)
656	{
657	/* this is const, no need to lock */
658	aEventSource = mData.m_pEventSource;
659	return aEventSource.isNull() ? E_FAIL : S_OK;
660	}
661
662	// IVirtualBoxClient methods
663	/////////////////////////////////////////////////////////////////////////////
664
665	/**
666	* Checks a Machine object for any pending errors.
667	*
668	* @returns COM status code
669	* @param aMachine Machine object to check.
670	*/
671	HRESULT VirtualBoxClient::checkMachineError(const ComPtr<IMachine> &aMachine)
672	{
673	BOOL fAccessible = FALSE;
674	HRESULT rc = aMachine->COMGETTER(Accessible)(&fAccessible);
675	if (FAILED(rc))
676	return setError(rc, tr("Could not check the accessibility status of the VM"));
677	else if (!fAccessible)
678	{
679	ComPtr<IVirtualBoxErrorInfo> pAccessError;
680	rc = aMachine->COMGETTER(AccessError)(pAccessError.asOutParam());
681	if (FAILED(rc))
682	return setError(rc, tr("Could not get the access error message of the VM"));
683	else
684	{
685	ErrorInfo info(pAccessError);
686	ErrorInfoKeeper eik(info);
687	return info.getResultCode();
688	}
689	}
690	return S_OK;
691	}
692
693	// private methods
694	/////////////////////////////////////////////////////////////////////////////
695
696
697	/// @todo AM Add pinging of VBoxSDS
698	/static/
699	DECLCALLBACK(int) VirtualBoxClient::SVCWatcherThread(RTTHREAD ThreadSelf,
700	void *pvUser)
701	{
702	NOREF(ThreadSelf);
703	Assert(pvUser);
704	VirtualBoxClient pThis = (VirtualBoxClient )pvUser;
705	RTSEMEVENT sem = pThis->mData.m_SemEvWatcher;
706	RTMSINTERVAL cMillies = VBOXCLIENT_DEFAULT_INTERVAL;
707	int vrc;
708
709	/* The likelihood of early crashes are high, so start with a short wait. */
710	vrc = RTSemEventWait(sem, cMillies / 2);
711
712	/* As long as the waiting times out keep retrying the wait. */
713	while (RT_FAILURE(vrc))
714	{
715	{
716	HRESULT rc = S_OK;
717	ComPtr<IVirtualBox> pV;
718	{
719	AutoReadLock alock(pThis COMMA_LOCKVAL_SRC_POS);
720	pV = pThis->mData.m_pVirtualBox;
721	}
722	if (!pV.isNull())
723	{
724	ULONG rev;
725	rc = pV->COMGETTER(Revision)(&rev);
726	if (FAILED_DEAD_INTERFACE(rc))
727	{
728	LogRel(("VirtualBoxClient: detected unresponsive VBoxSVC (rc=%Rhrc)\n", rc));
729	{
730	AutoWriteLock alock(pThis COMMA_LOCKVAL_SRC_POS);
731	/* Throw away the VirtualBox reference, it's no longer
732	* usable as VBoxSVC terminated in the mean time. */
733	pThis->mData.m_pVirtualBox.setNull();
734	}
735	::FireVBoxSVCAvailabilityChangedEvent(pThis->mData.m_pEventSource, FALSE);
736	}
737	}
738	else
739	{
740	/* Try to get a new VirtualBox reference straight away, and if
741	* this fails use an increased waiting time as very frequent
742	* restart attempts in some wedged config can cause high CPU
743	* and disk load. */
744	ComPtr<IVirtualBox> pVirtualBox;
745	ComPtr<IToken> pToken;
746	rc = pVirtualBox.createLocalObject(CLSID_VirtualBox);
747	if (FAILED(rc))
748	cMillies = 3 * VBOXCLIENT_DEFAULT_INTERVAL;
749	else
750	{
751	LogRel(("VirtualBoxClient: detected working VBoxSVC (rc=%Rhrc)\n", rc));
752	{
753	AutoWriteLock alock(pThis COMMA_LOCKVAL_SRC_POS);
754	/* Update the VirtualBox reference, there's a working
755	* VBoxSVC again from now on. */
756	pThis->mData.m_pVirtualBox = pVirtualBox;
757	pThis->mData.m_pToken = pToken;
758	#ifdef VBOX_WITH_MAIN_NLS
759	/* update language using new instance of IVirtualBox in case the language settings was changed */
760	pThis->i_reloadApiLanguage();
761	pThis->i_registerEventListener();
762	#endif
763	}
764	::FireVBoxSVCAvailabilityChangedEvent(pThis->mData.m_pEventSource, TRUE);
765	cMillies = VBOXCLIENT_DEFAULT_INTERVAL;
766	}
767	}
768	}
769	vrc = RTSemEventWait(sem, cMillies);
770	}
771	return 0;
772	}
773
774	#ifdef VBOX_WITH_MAIN_NLS
775
776	HRESULT VirtualBoxClient::i_reloadApiLanguage()
777	{
778	if (mData.m_pVBoxTranslator == NULL)
779	return S_OK;
780
781	HRESULT rc = mData.m_pVBoxTranslator->loadLanguage(mData.m_pVirtualBox);
782	if (FAILED(rc))
783	setError(rc, tr("Failed to load user language instance"));
784	return rc;
785	}
786
787	HRESULT VirtualBoxClient::i_registerEventListener()
788	{
789	HRESULT rc = mData.m_pVirtualBox->COMGETTER(EventSource)(mData.m_pVBoxEventSource.asOutParam());
790	if (SUCCEEDED(rc))
791	{
792	ComObjPtr<VBoxEventListenerImpl> pVBoxListener;
793	pVBoxListener.createObject();
794	pVBoxListener->init(new VBoxEventListener());
795	mData.m_pVBoxEventListener = pVBoxListener;
796	com::SafeArray<VBoxEventType_T> eventTypes;
797	eventTypes.push_back(VBoxEventType_OnLanguageChanged);
798	rc = mData.m_pVBoxEventSource->RegisterListener(pVBoxListener, ComSafeArrayAsInParam(eventTypes), true);
799	if (FAILED(rc))
800	{
801	rc = setError(rc, tr("Failed to register listener"));
802	mData.m_pVBoxEventListener.setNull();
803	mData.m_pVBoxEventSource.setNull();
804	}
805	}
806	else
807	rc = setError(rc, tr("Failed to get event source from VirtualBox"));
808	return rc;
809	}
810
811	void VirtualBoxClient::i_unregisterEventListener()
812	{
813	if (mData.m_pVBoxEventListener.isNotNull())
814	{
815	if (mData.m_pVBoxEventSource.isNotNull())
816	mData.m_pVBoxEventSource->UnregisterListener(mData.m_pVBoxEventListener);
817	mData.m_pVBoxEventListener.setNull();
818	}
819	mData.m_pVBoxEventSource.setNull();
820	}
821
822	#endif /* VBOX_WITH_MAIN_NLS */
823
824	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-client/VirtualBoxClientImpl.cpp@ 94267

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