EmulatedUSBImpl.cpp@ 63495

Last change on this file since 63495 was 62485, checked in by vboxsync, 8 years ago
(C) 2016
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 17.5 KB

Line
1	/* $Id: EmulatedUSBImpl.cpp 62485 2016-07-22 18:36:43Z vboxsync $ */
2	/** @file
3	*
4	* Emulated USB manager implementation.
5	*/
6
7	/*
8	* Copyright (C) 2013-2016 Oracle Corporation
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19	#define LOG_GROUP_MAIN_OVERRIDE LOG_GROUP_MAIN_EMULATEDUSB
20
21	#include "EmulatedUSBImpl.h"
22	#include "ConsoleImpl.h"
23	#include "Logging.h"
24
25	#include <VBox/vmm/pdmusb.h>
26
27
28	/*
29	* Emulated USB webcam device instance.
30	*/
31	typedef std::map <Utf8Str, Utf8Str> EUSBSettingsMap;
32
33	typedef enum EUSBDEVICESTATUS
34	{
35	EUSBDEVICE_CREATED,
36	EUSBDEVICE_ATTACHING,
37	EUSBDEVICE_ATTACHED
38	} EUSBDEVICESTATUS;
39
40	class EUSBWEBCAM /* : public EUSBDEVICE */
41	{
42	private:
43	int32_t volatile mcRefs;
44
45	EmulatedUSB *mpEmulatedUSB;
46
47	RTUUID mUuid;
48	char mszUuid[RTUUID_STR_LENGTH];
49
50	Utf8Str mPath;
51	Utf8Str mSettings;
52
53	EUSBSettingsMap mDevSettings;
54	EUSBSettingsMap mDrvSettings;
55
56	void *mpvObject;
57
58	static DECLCALLBACK(int) emulatedWebcamAttach(PUVM pUVM, EUSBWEBCAM pThis, const char pszDriver);
59	static DECLCALLBACK(int) emulatedWebcamDetach(PUVM pUVM, EUSBWEBCAM *pThis);
60
61	HRESULT settingsParse(void);
62
63	~EUSBWEBCAM()
64	{
65	}
66
67	public:
68	EUSBWEBCAM()
69	:
70	mcRefs(1),
71	mpEmulatedUSB(NULL),
72	mpvObject(NULL),
73	enmStatus(EUSBDEVICE_CREATED)
74	{
75	RT_ZERO(mUuid);
76	RT_ZERO(mszUuid);
77	}
78
79	int32_t AddRef(void)
80	{
81	return ASMAtomicIncS32(&mcRefs);
82	}
83
84	void Release(void)
85	{
86	int32_t c = ASMAtomicDecS32(&mcRefs);
87	if (c == 0)
88	{
89	delete this;
90	}
91	}
92
93	HRESULT Initialize(Console *pConsole,
94	EmulatedUSB *pEmulatedUSB,
95	const com::Utf8Str *aPath,
96	const com::Utf8Str *aSettings,
97	void *pvObject);
98	HRESULT Attach(Console *pConsole,
99	PUVM pUVM,
100	const char *pszDriver);
101	HRESULT Detach(Console *pConsole,
102	PUVM pUVM);
103
104	bool HasId(const char *pszId) { return RTStrCmp(pszId, mszUuid) == 0;}
105
106	EUSBDEVICESTATUS enmStatus;
107	};
108
109	static int emulatedWebcamInsertSettings(PCFGMNODE pConfig, EUSBSettingsMap *pSettings)
110	{
111	int rc = VINF_SUCCESS;
112
113	EUSBSettingsMap::const_iterator it;
114	for (it = pSettings->begin(); it != pSettings->end(); ++it)
115	{
116	/* Convert some well known settings for backward compatibility. */
117	if ( RTStrCmp(it->first.c_str(), "MaxPayloadTransferSize") == 0
118	\|\| RTStrCmp(it->first.c_str(), "MaxFramerate") == 0)
119	{
120	uint32_t u32 = 0;
121	rc = RTStrToUInt32Full(it->second.c_str(), 10, &u32);
122	if (rc == VINF_SUCCESS)
123	{
124	rc = CFGMR3InsertInteger(pConfig, it->first.c_str(), u32);
125	}
126	else
127	{
128	if (RT_SUCCESS(rc)) /* VWRN_* */
129	{
130	rc = VERR_INVALID_PARAMETER;
131	}
132	}
133	}
134	else
135	{
136	rc = CFGMR3InsertString(pConfig, it->first.c_str(), it->second.c_str());
137	}
138
139	if (RT_FAILURE(rc))
140	{
141	break;
142	}
143	}
144
145	return rc;
146	}
147
148	/* static / DECLCALLBACK(int) EUSBWEBCAM::emulatedWebcamAttach(PUVM pUVM, EUSBWEBCAM pThis, const char *pszDriver)
149	{
150	PCFGMNODE pInstance = CFGMR3CreateTree(pUVM);
151	PCFGMNODE pConfig;
152	CFGMR3InsertNode(pInstance, "Config", &pConfig);
153	int rc = emulatedWebcamInsertSettings(pConfig, &pThis->mDevSettings);
154	if (RT_FAILURE(rc))
155	return rc;
156	PCFGMNODE pEUSB;
157	CFGMR3InsertNode(pConfig, "EmulatedUSB", &pEUSB);
158	CFGMR3InsertString(pEUSB, "Id", pThis->mszUuid);
159	CFGMR3InsertInteger(pEUSB, "pfnCallback", (uintptr_t)EmulatedUSB::i_eusbCallback);
160	CFGMR3InsertInteger(pEUSB, "pvCallback", (uintptr_t)pThis->mpEmulatedUSB);
161
162	PCFGMNODE pLunL0;
163	CFGMR3InsertNode(pInstance, "LUN#0", &pLunL0);
164	CFGMR3InsertString(pLunL0, "Driver", pszDriver);
165	CFGMR3InsertNode(pLunL0, "Config", &pConfig);
166	CFGMR3InsertString(pConfig, "DevicePath", pThis->mPath.c_str());
167	CFGMR3InsertInteger(pConfig, "Object", (uintptr_t)pThis->mpvObject);
168	rc = emulatedWebcamInsertSettings(pConfig, &pThis->mDrvSettings);
169	if (RT_FAILURE(rc))
170	return rc;
171
172	/* pInstance will be used by PDM and deallocated on error. */
173	rc = PDMR3UsbCreateEmulatedDevice(pUVM, "Webcam", pInstance, &pThis->mUuid, NULL);
174	LogRelFlowFunc(("PDMR3UsbCreateEmulatedDevice %Rrc\n", rc));
175	return rc;
176	}
177
178	/* static / DECLCALLBACK(int) EUSBWEBCAM::emulatedWebcamDetach(PUVM pUVM, EUSBWEBCAM pThis)
179	{
180	return PDMR3UsbDetachDevice(pUVM, &pThis->mUuid);
181	}
182
183	HRESULT EUSBWEBCAM::Initialize(Console *pConsole,
184	EmulatedUSB *pEmulatedUSB,
185	const com::Utf8Str *aPath,
186	const com::Utf8Str *aSettings,
187	void *pvObject)
188	{
189	HRESULT hrc = S_OK;
190
191	int vrc = RTUuidCreate(&mUuid);
192	if (RT_SUCCESS(vrc))
193	{
194	RTStrPrintf(mszUuid, sizeof(mszUuid), "%RTuuid", &mUuid);
195	hrc = mPath.assignEx(*aPath);
196	if (SUCCEEDED(hrc))
197	{
198	hrc = mSettings.assignEx(*aSettings);
199	}
200
201	if (SUCCEEDED(hrc))
202	{
203	hrc = settingsParse();
204
205	if (SUCCEEDED(hrc))
206	{
207	mpEmulatedUSB = pEmulatedUSB;
208	mpvObject = pvObject;
209	}
210	}
211	}
212
213	if (SUCCEEDED(hrc) && RT_FAILURE(vrc))
214	{
215	LogFlowThisFunc(("%Rrc\n", vrc));
216	hrc = pConsole->setError(VBOX_E_IPRT_ERROR,
217	"Init emulated USB webcam (%Rrc)", vrc);
218	}
219
220	return hrc;
221	}
222
223	HRESULT EUSBWEBCAM::settingsParse(void)
224	{
225	HRESULT hr = S_OK;
226
227	/* Parse mSettings string:
228	* "[dev:\|drv:]Name1=Value1;[dev:\|drv:]Name2=Value2"
229	*/
230	char *pszSrc = mSettings.mutableRaw();
231
232	if (pszSrc)
233	{
234	while (*pszSrc)
235	{
236	/* Does the setting belong to device of driver. Default is both. */
237	bool fDev = true;
238	bool fDrv = true;
239	if (RTStrNICmp(pszSrc, RT_STR_TUPLE("drv:")) == 0)
240	{
241	pszSrc += sizeof("drv:")-1;
242	fDev = false;
243	}
244	else if (RTStrNICmp(pszSrc, RT_STR_TUPLE("dev:")) == 0)
245	{
246	pszSrc += sizeof("dev:")-1;
247	fDrv = false;
248	}
249
250	char *pszEq = RTStrStr(pszSrc, "=");
251	if (!pszEq)
252	{
253	hr = E_INVALIDARG;
254	break;
255	}
256
257	char *pszEnd = RTStrStr(pszEq, ";");
258	if (!pszEnd)
259	{
260	pszEnd = pszEq + strlen(pszEq);
261	}
262
263	*pszEq = 0;
264	char chEnd = *pszEnd;
265	*pszEnd = 0;
266
267	/* Empty strings not allowed. */
268	if (*pszSrc != 0 && pszEq[1] != 0)
269	{
270	if (fDev)
271	{
272	mDevSettings[pszSrc] = &pszEq[1];
273	}
274	if (fDrv)
275	{
276	mDrvSettings[pszSrc] = &pszEq[1];
277	}
278	}
279
280	*pszEq = '=';
281	*pszEnd = chEnd;
282
283	pszSrc = pszEnd;
284	if (*pszSrc == ';')
285	{
286	pszSrc++;
287	}
288	}
289
290	if (SUCCEEDED(hr))
291	{
292	EUSBSettingsMap::const_iterator it;
293	for (it = mDevSettings.begin(); it != mDevSettings.end(); ++it)
294	LogRelFlowFunc(("[dev:%s] = [%s]\n", it->first.c_str(), it->second.c_str()));
295	for (it = mDrvSettings.begin(); it != mDrvSettings.end(); ++it)
296	LogRelFlowFunc(("[drv:%s] = [%s]\n", it->first.c_str(), it->second.c_str()));
297	}
298	}
299
300	return hr;
301	}
302
303	HRESULT EUSBWEBCAM::Attach(Console *pConsole,
304	PUVM pUVM,
305	const char *pszDriver)
306	{
307	HRESULT hrc = S_OK;
308
309	int vrc = VMR3ReqCallWaitU(pUVM, 0 /* idDstCpu (saved state, see #6232) */,
310	(PFNRT)emulatedWebcamAttach, 3,
311	pUVM, this, pszDriver);
312
313	if (SUCCEEDED(hrc) && RT_FAILURE(vrc))
314	{
315	LogFlowThisFunc(("%Rrc\n", vrc));
316	hrc = pConsole->setError(VBOX_E_IPRT_ERROR,
317	"Attach emulated USB webcam (%Rrc)", vrc);
318	}
319
320	return hrc;
321	}
322
323	HRESULT EUSBWEBCAM::Detach(Console *pConsole,
324	PUVM pUVM)
325	{
326	HRESULT hrc = S_OK;
327
328	int vrc = VMR3ReqCallWaitU(pUVM, 0 /* idDstCpu (saved state, see #6232) */,
329	(PFNRT)emulatedWebcamDetach, 2,
330	pUVM, this);
331
332	if (SUCCEEDED(hrc) && RT_FAILURE(vrc))
333	{
334	LogFlowThisFunc(("%Rrc\n", vrc));
335	hrc = pConsole->setError(VBOX_E_IPRT_ERROR,
336	"Detach emulated USB webcam (%Rrc)", vrc);
337	}
338
339	return hrc;
340	}
341
342
343	/*
344	* EmulatedUSB implementation.
345	*/
346	DEFINE_EMPTY_CTOR_DTOR(EmulatedUSB)
347
348	HRESULT EmulatedUSB::FinalConstruct()
349	{
350	return BaseFinalConstruct();
351	}
352
353	void EmulatedUSB::FinalRelease()
354	{
355	uninit();
356
357	BaseFinalRelease();
358	}
359
360	/*
361	* Initializes the instance.
362	*
363	* @param pConsole The owner.
364	*/
365	HRESULT EmulatedUSB::init(ComObjPtr<Console> pConsole)
366	{
367	LogFlowThisFunc(("\n"));
368
369	ComAssertRet(!pConsole.isNull(), E_INVALIDARG);
370
371	/* Enclose the state transition NotReady->InInit->Ready */
372	AutoInitSpan autoInitSpan(this);
373	AssertReturn(autoInitSpan.isOk(), E_FAIL);
374
375	m.pConsole = pConsole;
376
377	/* Confirm a successful initialization */
378	autoInitSpan.setSucceeded();
379
380	return S_OK;
381	}
382
383	/*
384	* Uninitializes the instance.
385	* Called either from FinalRelease() or by the parent when it gets destroyed.
386	*/
387	void EmulatedUSB::uninit()
388	{
389	LogFlowThisFunc(("\n"));
390
391	m.pConsole.setNull();
392
393	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
394	WebcamsMap::iterator it = m.webcams.begin();
395	while (it != m.webcams.end())
396	{
397	EUSBWEBCAM *p = it->second;
398	m.webcams.erase(it++);
399	p->Release();
400	}
401	alock.release();
402
403	/* Enclose the state transition Ready->InUninit->NotReady */
404	AutoUninitSpan autoUninitSpan(this);
405	if (autoUninitSpan.uninitDone())
406	return;
407	}
408
409	HRESULT EmulatedUSB::getWebcams(std::vector<com::Utf8Str> &aWebcams)
410	{
411	HRESULT hrc = S_OK;
412
413	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
414
415	try
416	{
417	aWebcams.resize(m.webcams.size());
418	}
419	catch (std::bad_alloc &)
420	{
421	hrc = E_OUTOFMEMORY;
422	}
423	catch (...)
424	{
425	hrc = E_FAIL;
426	}
427
428	if (SUCCEEDED(hrc))
429	{
430	size_t i;
431	WebcamsMap::const_iterator it;
432	for (i = 0, it = m.webcams.begin(); it != m.webcams.end(); ++it)
433	aWebcams[i++] = it->first;
434	}
435
436	return hrc;
437	}
438
439	static const Utf8Str s_pathDefault(".0");
440
441	HRESULT EmulatedUSB::webcamAttach(const com::Utf8Str &aPath,
442	const com::Utf8Str &aSettings)
443	{
444	return i_webcamAttachInternal(aPath, aSettings, "HostWebcam", NULL);
445	}
446
447	HRESULT EmulatedUSB::i_webcamAttachInternal(const com::Utf8Str &aPath,
448	const com::Utf8Str &aSettings,
449	const char *pszDriver,
450	void *pvObject)
451	{
452	HRESULT hrc = S_OK;
453
454	const Utf8Str &path = aPath.isEmpty() \|\| aPath == "."? s_pathDefault: aPath;
455
456	Console::SafeVMPtr ptrVM(m.pConsole);
457	if (ptrVM.isOk())
458	{
459	EUSBWEBCAM *p = new EUSBWEBCAM();
460	if (p)
461	{
462	hrc = p->Initialize(m.pConsole, this, &path, &aSettings, pvObject);
463	if (SUCCEEDED(hrc))
464	{
465	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
466	WebcamsMap::const_iterator it = m.webcams.find(path);
467	if (it == m.webcams.end())
468	{
469	p->AddRef();
470	try
471	{
472	m.webcams[path] = p;
473	}
474	catch (std::bad_alloc &)
475	{
476	hrc = E_OUTOFMEMORY;
477	}
478	catch (...)
479	{
480	hrc = E_FAIL;
481	}
482	p->enmStatus = EUSBDEVICE_ATTACHING;
483	}
484	else
485	{
486	hrc = E_FAIL;
487	}
488	}
489
490	if (SUCCEEDED(hrc))
491	{
492	hrc = p->Attach(m.pConsole, ptrVM.rawUVM(), pszDriver);
493	}
494
495	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
496	if (SUCCEEDED(hrc))
497	{
498	p->enmStatus = EUSBDEVICE_ATTACHED;
499	}
500	else
501	{
502	if (p->enmStatus != EUSBDEVICE_CREATED)
503	{
504	m.webcams.erase(path);
505	}
506	}
507	alock.release();
508
509	p->Release();
510	}
511	else
512	{
513	hrc = E_OUTOFMEMORY;
514	}
515	}
516	else
517	{
518	hrc = VBOX_E_INVALID_VM_STATE;
519	}
520
521	return hrc;
522	}
523
524	HRESULT EmulatedUSB::webcamDetach(const com::Utf8Str &aPath)
525	{
526	return i_webcamDetachInternal(aPath);
527	}
528
529	HRESULT EmulatedUSB::i_webcamDetachInternal(const com::Utf8Str &aPath)
530	{
531	HRESULT hrc = S_OK;
532
533	const Utf8Str &path = aPath.isEmpty() \|\| aPath == "."? s_pathDefault: aPath;
534
535	Console::SafeVMPtr ptrVM(m.pConsole);
536	if (ptrVM.isOk())
537	{
538	EUSBWEBCAM *p = NULL;
539
540	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
541	WebcamsMap::iterator it = m.webcams.find(path);
542	if (it != m.webcams.end())
543	{
544	if (it->second->enmStatus == EUSBDEVICE_ATTACHED)
545	{
546	p = it->second;
547	m.webcams.erase(it);
548	}
549	}
550	alock.release();
551
552	if (p)
553	{
554	hrc = p->Detach(m.pConsole, ptrVM.rawUVM());
555	p->Release();
556	}
557	else
558	{
559	hrc = E_INVALIDARG;
560	}
561	}
562	else
563	{
564	hrc = VBOX_E_INVALID_VM_STATE;
565	}
566
567	return hrc;
568	}
569
570	/* static / DECLCALLBACK(int) EmulatedUSB::eusbCallbackEMT(EmulatedUSB pThis, char *pszId, uint32_t iEvent,
571	void *pvData, uint32_t cbData)
572	{
573	LogRelFlowFunc(("id %s event %d, data %p %d\n", pszId, iEvent, pvData, cbData));
574
575	NOREF(cbData);
576
577	int rc = VINF_SUCCESS;
578	if (iEvent == 0)
579	{
580	com::Utf8Str path;
581	HRESULT hr = pThis->webcamPathFromId(&path, pszId);
582	if (SUCCEEDED(hr))
583	{
584	hr = pThis->webcamDetach(path);
585	if (FAILED(hr))
586	{
587	rc = VERR_INVALID_STATE;
588	}
589	}
590	else
591	{
592	rc = VERR_NOT_FOUND;
593	}
594	}
595	else
596	{
597	rc = VERR_INVALID_PARAMETER;
598	}
599
600	RTMemFree(pszId);
601	RTMemFree(pvData);
602
603	LogRelFlowFunc(("rc %Rrc\n", rc));
604	return rc;
605	}
606
607	/* static / DECLCALLBACK(int) EmulatedUSB::i_eusbCallback(void pv, const char *pszId, uint32_t iEvent,
608	const void *pvData, uint32_t cbData)
609	{
610	/* Make a copy of parameters, forward to EMT and leave the callback to not hold any lock in the device. */
611	int rc = VINF_SUCCESS;
612
613	void *pvIdCopy = NULL;
614	void *pvDataCopy = NULL;
615	if (cbData > 0)
616	{
617	pvDataCopy = RTMemDup(pvData, cbData);
618	if (!pvDataCopy)
619	{
620	rc = VERR_NO_MEMORY;
621	}
622	}
623
624	if (RT_SUCCESS(rc))
625	{
626	pvIdCopy = RTMemDup(pszId, strlen(pszId) + 1);
627	if (!pvIdCopy)
628	{
629	rc = VERR_NO_MEMORY;
630	}
631	}
632
633	if (RT_SUCCESS(rc))
634	{
635	EmulatedUSB pThis = (EmulatedUSB )pv;
636	Console::SafeVMPtr ptrVM(pThis->m.pConsole);
637	if (ptrVM.isOk())
638	{
639	/* No wait. */
640	rc = VMR3ReqCallNoWaitU(ptrVM.rawUVM(), 0 /* idDstCpu */,
641	(PFNRT)EmulatedUSB::eusbCallbackEMT, 5,
642	pThis, pvIdCopy, iEvent, pvDataCopy, cbData);
643	}
644	else
645	{
646	rc = VERR_INVALID_STATE;
647	}
648	}
649
650	if (RT_FAILURE(rc))
651	{
652	RTMemFree(pvIdCopy);
653	RTMemFree(pvDataCopy);
654	}
655
656	return rc;
657	}
658
659	HRESULT EmulatedUSB::webcamPathFromId(com::Utf8Str pPath, const char pszId)
660	{
661	HRESULT hr = S_OK;
662
663	Console::SafeVMPtr ptrVM(m.pConsole);
664	if (ptrVM.isOk())
665	{
666	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
667	WebcamsMap::const_iterator it;
668	for (it = m.webcams.begin(); it != m.webcams.end(); ++it)
669	{
670	EUSBWEBCAM *p = it->second;
671	if (p->HasId(pszId))
672	{
673	*pPath = it->first;
674	break;
675	}
676	}
677
678	if (it == m.webcams.end())
679	{
680	hr = E_FAIL;
681	}
682	alock.release();
683	}
684	else
685	{
686	hr = VBOX_E_INVALID_VM_STATE;
687	}
688
689	return hr;
690	}
691
692	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-client/EmulatedUSBImpl.cpp@ 63495

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