VBoxDragAndDropSvc.cpp@ 86011

Last change on this file since 86011 was 85749, checked in by vboxsync, 4 years ago
DnD/HostService: Guest reboot / shutdown fixes.
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File size: 46.0 KB

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1	/* $Id: VBoxDragAndDropSvc.cpp 85749 2020-08-13 11:18:00Z vboxsync $ */
2	/** @file
3	* Drag and Drop Service.
4	*/
5
6	/*
7	* Copyright (C) 2011-2020 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	/** @page pg_svc_dnd Drag and drop HGCM Service
19	*
20	* @sa See src/VBox/Main/src-client/GuestDnDPrivate.cpp for more information.
21	*/
22
23
24	/*********************************************************************************************************************************
25	* Header Files *
26	*********************************************************************************************************************************/
27	#define LOG_GROUP LOG_GROUP_GUEST_DND
28	#include <VBox/GuestHost/DragAndDrop.h>
29	#include <VBox/GuestHost/DragAndDropDefs.h>
30	#include <VBox/HostServices/Service.h>
31	#include <VBox/HostServices/DragAndDropSvc.h>
32	#include <VBox/AssertGuest.h>
33
34	#include <VBox/err.h>
35
36	#include <algorithm>
37	#include <list>
38	#include <map>
39
40	#include "dndmanager.h"
41
42	using namespace DragAndDropSvc;
43
44
45	/*********************************************************************************************************************************
46	* Service class declaration *
47	*********************************************************************************************************************************/
48
49	class DragAndDropClient : public HGCM::Client
50	{
51	public:
52
53	DragAndDropClient(uint32_t idClient)
54	: HGCM::Client(idClient)
55	, uProtocolVerDeprecated(0)
56	, fGuestFeatures0(VBOX_DND_GF_NONE)
57	, fGuestFeatures1(VBOX_DND_GF_NONE)
58	{
59	RT_ZERO(m_SvcCtx);
60	}
61
62	virtual ~DragAndDropClient(void)
63	{
64	disconnect();
65	}
66
67	public:
68
69	void disconnect(void) RT_NOEXCEPT;
70
71	public:
72
73	/** Protocol version used by this client.
74	* Deprecated; only used for keeping backwards compatibility. */
75	uint32_t uProtocolVerDeprecated;
76	/** Guest feature flags, VBOX_DND_GF_0_XXX. */
77	uint64_t fGuestFeatures0;
78	/** Guest feature flags, VBOX_DND_GF_1_XXX. */
79	uint64_t fGuestFeatures1;
80	};
81
82	/** Map holding pointers to drag and drop clients. Key is the (unique) HGCM client ID. */
83	typedef std::map<uint32_t, DragAndDropClient*> DnDClientMap;
84
85	/** Simple queue (list) which holds deferred (waiting) clients. */
86	typedef std::list<uint32_t> DnDClientQueue;
87
88	/**
89	* Specialized drag & drop service class.
90	*/
91	class DragAndDropService : public HGCM::AbstractService<DragAndDropService>
92	{
93	public:
94	explicit DragAndDropService(PVBOXHGCMSVCHELPERS pHelpers)
95	: HGCM::AbstractService<DragAndDropService>(pHelpers)
96	, m_pManager(NULL)
97	, m_u32Mode(VBOX_DRAG_AND_DROP_MODE_OFF)
98	{}
99
100	protected:
101	int init(VBOXHGCMSVCFNTABLE *pTable) RT_NOEXCEPT RT_OVERRIDE;
102	int uninit(void) RT_NOEXCEPT RT_OVERRIDE;
103	int clientConnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT RT_OVERRIDE;
104	int clientDisconnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT RT_OVERRIDE;
105	int clientQueryFeatures(uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT;
106	int clientReportFeatures(DragAndDropClient *pClient, uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT;
107	void guestCall(VBOXHGCMCALLHANDLE callHandle, uint32_t idClient, void *pvClient, uint32_t u32Function,
108	uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT RT_OVERRIDE;
109	int hostCall(uint32_t u32Function, uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT RT_OVERRIDE;
110
111	private:
112	int modeSet(uint32_t u32Mode) RT_NOEXCEPT;
113	inline uint32_t modeGet(void) const RT_NOEXCEPT
114	{ return m_u32Mode; };
115
116	static DECLCALLBACK(int) progressCallback(uint32_t uStatus, uint32_t uPercentage, int rc, void *pvUser);
117
118	private:
119	/** Pointer to our DnD manager instance. */
120	DnDManager *m_pManager;
121	/** Map of all connected clients.
122	* The primary key is the (unique) client ID, the secondary value
123	* an allocated pointer to the DragAndDropClient class, managed
124	* by this service class. */
125	DnDClientMap m_clientMap;
126	/** List of all clients which are queued up (deferred return) and ready
127	* to process new commands. The key is the (unique) client ID. */
128	DnDClientQueue m_clientQueue;
129	/** Current drag and drop mode, VBOX_DRAG_AND_DROP_MODE_XXX. */
130	uint32_t m_u32Mode;
131	/** Host feature mask (VBOX_DND_HF_0_XXX) for DND_GUEST_REPORT_FEATURES
132	* and DND_GUEST_QUERY_FEATURES. */
133	uint64_t m_fHostFeatures0;
134	};
135
136
137	/*********************************************************************************************************************************
138	* Client implementation *
139	*********************************************************************************************************************************/
140
141	/**
142	* Called when the HGCM client disconnected on the guest side.
143	*
144	* This function takes care of the client's data cleanup and also lets the host
145	* know that the client has been disconnected.
146	*/
147	void DragAndDropClient::disconnect(void) RT_NOEXCEPT
148	{
149	LogFlowThisFunc(("uClient=%RU32\n", m_idClient));
150
151	if (IsDeferred())
152	CompleteDeferred(VERR_INTERRUPTED);
153
154	/*
155	* Let the host know.
156	*/
157	VBOXDNDCBDISCONNECTMSGDATA data;
158	RT_ZERO(data);
159	/** @todo Magic needed? */
160	/** @todo Add context ID. */
161
162	if (m_SvcCtx.pfnHostCallback)
163	{
164	int rc2 = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, GUEST_DND_FN_DISCONNECT, &data, sizeof(data));
165	if (RT_FAILURE(rc2))
166	LogFlowFunc(("Warning: Unable to notify host about client %RU32 disconnect, rc=%Rrc\n", m_idClient, rc2));
167	/* Not fatal. */
168	}
169	}
170
171
172	/*********************************************************************************************************************************
173	* Service class implementation *
174	*********************************************************************************************************************************/
175
176	int DragAndDropService::init(VBOXHGCMSVCFNTABLE *pTable) RT_NOEXCEPT
177	{
178	/* Register functions. */
179	pTable->pfnHostCall = svcHostCall;
180	pTable->pfnSaveState = NULL; /* The service is stateless, so the normal */
181	pTable->pfnLoadState = NULL; /* construction done before restoring suffices */
182	pTable->pfnRegisterExtension = svcRegisterExtension;
183	pTable->pfnNotify = NULL;
184
185	/* Drag'n drop mode is disabled by default. */
186	modeSet(VBOX_DRAG_AND_DROP_MODE_OFF);
187
188	/* Set host features. */
189	m_fHostFeatures0 = VBOX_DND_HF_NONE;
190
191	int rc = VINF_SUCCESS;
192
193	try
194	{
195	m_pManager = new DnDManager(&DragAndDropService::progressCallback, this);
196	}
197	catch (std::bad_alloc &)
198	{
199	rc = VERR_NO_MEMORY;
200	}
201
202	LogFlowFuncLeaveRC(rc);
203	return rc;
204	}
205
206	int DragAndDropService::uninit(void) RT_NOEXCEPT
207	{
208	LogFlowFuncEnter();
209
210	if (m_pManager)
211	{
212	delete m_pManager;
213	m_pManager = NULL;
214	}
215
216	DnDClientMap::iterator itClient = m_clientMap.begin();
217	while (itClient != m_clientMap.end())
218	{
219	delete itClient->second;
220	m_clientMap.erase(itClient);
221	itClient = m_clientMap.begin();
222	}
223
224	LogFlowFuncLeave();
225	return VINF_SUCCESS;
226	}
227
228	int DragAndDropService::clientConnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT
229	{
230	RT_NOREF1(pvClient);
231	if (m_clientMap.size() >= UINT8_MAX) /* Don't allow too much clients at the same time. */
232	{
233	AssertMsgFailed(("Maximum number of clients reached\n"));
234	return VERR_MAX_PROCS_REACHED;
235	}
236
237
238	/*
239	* Add client to our client map.
240	*/
241	if (m_clientMap.find(idClient) != m_clientMap.end())
242	{
243	LogFunc(("Client %RU32 is already connected!\n", idClient));
244	return VERR_ALREADY_EXISTS;
245	}
246
247	try
248	{
249	DragAndDropClient *pClient = new DragAndDropClient(idClient);
250	pClient->SetSvcContext(m_SvcCtx);
251	m_clientMap[idClient] = pClient;
252	}
253	catch (std::bad_alloc &)
254	{
255	LogFunc(("Client %RU32 - VERR_NO_MEMORY!\n", idClient));
256	return VERR_NO_MEMORY;
257	}
258
259	/*
260	* Reset the message queue as soon as a new clients connect
261	* to ensure that every client has the same state.
262	*/
263	if (m_pManager)
264	m_pManager->Reset();
265
266	LogFlowFunc(("Client %RU32 connected (VINF_SUCCESS)\n", idClient));
267	return VINF_SUCCESS;
268	}
269
270	int DragAndDropService::clientDisconnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT
271	{
272	RT_NOREF1(pvClient);
273
274	/* Client not found? Bail out early. */
275	DnDClientMap::iterator itClient = m_clientMap.find(idClient);
276	if (itClient == m_clientMap.end())
277	{
278	LogFunc(("Client %RU32 not found!\n", idClient));
279	return VERR_NOT_FOUND;
280	}
281
282	/*
283	* Remove from waiters queue.
284	*/
285	m_clientQueue.remove(idClient);
286
287	/*
288	* Remove from client map and deallocate.
289	*/
290	AssertPtr(itClient->second);
291	delete itClient->second;
292
293	m_clientMap.erase(itClient);
294
295	LogFlowFunc(("Client %RU32 disconnected\n", idClient));
296	return VINF_SUCCESS;
297	}
298
299	/**
300	* Implements GUEST_DND_FN_REPORT_FEATURES.
301	*
302	* @returns VBox status code.
303	* @retval VINF_HGCM_ASYNC_EXECUTE on success (we complete the message here).
304	* @retval VERR_ACCESS_DENIED if not master
305	* @retval VERR_INVALID_PARAMETER if bit 63 in the 2nd parameter isn't set.
306	* @retval VERR_WRONG_PARAMETER_COUNT
307	*
308	* @param pClient The client state.
309	* @param cParms Number of parameters.
310	* @param paParms Array of parameters.
311	*/
312	int DragAndDropService::clientReportFeatures(DragAndDropClient *pClient, uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
313	{
314	RT_NOREF(pClient);
315
316	/*
317	* Validate the request.
318	*/
319	ASSERT_GUEST_RETURN(cParms == 2, VERR_WRONG_PARAMETER_COUNT);
320	ASSERT_GUEST_RETURN(paParms[0].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
321	uint64_t const fFeatures0 = paParms[0].u.uint64;
322	ASSERT_GUEST_RETURN(paParms[1].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
323	uint64_t const fFeatures1 = paParms[1].u.uint64;
324	ASSERT_GUEST_RETURN(fFeatures1 & VBOX_DND_GF_1_MUST_BE_ONE, VERR_INVALID_PARAMETER);
325
326	/*
327	* Report back the host features.
328	*/
329	paParms[0].u.uint64 = m_fHostFeatures0;
330	paParms[1].u.uint64 = 0;
331
332	pClient->fGuestFeatures0 = fFeatures0;
333	pClient->fGuestFeatures1 = fFeatures1;
334
335	Log(("[Client %RU32] features: %#RX64 %#RX64\n", pClient->GetClientID(), fFeatures0, fFeatures1));
336
337	return VINF_SUCCESS;
338	}
339
340	/**
341	* Implements GUEST_DND_FN_QUERY_FEATURES.
342	*
343	* @returns VBox status code.
344	* @retval VINF_HGCM_ASYNC_EXECUTE on success (we complete the message here).
345	* @retval VERR_WRONG_PARAMETER_COUNT
346	*
347	* @param cParms Number of parameters.
348	* @param paParms Array of parameters.
349	*/
350	int DragAndDropService::clientQueryFeatures(uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
351	{
352	/*
353	* Validate the request.
354	*/
355	ASSERT_GUEST_RETURN(cParms == 2, VERR_WRONG_PARAMETER_COUNT);
356	ASSERT_GUEST_RETURN(paParms[0].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
357	ASSERT_GUEST_RETURN(paParms[1].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
358	ASSERT_GUEST(paParms[1].u.uint64 & RT_BIT_64(63));
359
360	/*
361	* Report back the host features.
362	*/
363	paParms[0].u.uint64 = m_fHostFeatures0;
364	paParms[1].u.uint64 = 0;
365
366	return VINF_SUCCESS;
367	}
368
369	int DragAndDropService::modeSet(uint32_t u32Mode) RT_NOEXCEPT
370	{
371	#ifndef VBOX_WITH_DRAG_AND_DROP_GH
372	if ( u32Mode == VBOX_DRAG_AND_DROP_MODE_GUEST_TO_HOST
373	\|\| u32Mode == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL)
374	{
375	m_u32Mode = VBOX_DRAG_AND_DROP_MODE_OFF;
376	return VERR_NOT_SUPPORTED;
377	}
378	#endif
379
380	switch (u32Mode)
381	{
382	case VBOX_DRAG_AND_DROP_MODE_OFF:
383	case VBOX_DRAG_AND_DROP_MODE_HOST_TO_GUEST:
384	case VBOX_DRAG_AND_DROP_MODE_GUEST_TO_HOST:
385	case VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL:
386	m_u32Mode = u32Mode;
387	break;
388
389	default:
390	m_u32Mode = VBOX_DRAG_AND_DROP_MODE_OFF;
391	break;
392	}
393
394	return VINF_SUCCESS;
395	}
396
397	void DragAndDropService::guestCall(VBOXHGCMCALLHANDLE callHandle, uint32_t idClient,
398	void *pvClient, uint32_t u32Function,
399	uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
400	{
401	RT_NOREF1(pvClient);
402	LogFlowFunc(("idClient=%RU32, u32Function=%RU32, cParms=%RU32\n", idClient, u32Function, cParms));
403
404	/* Check if we've the right mode set. */
405	int rc = VERR_ACCESS_DENIED; /* Play safe. */
406	switch (u32Function)
407	{
408	case GUEST_DND_FN_GET_NEXT_HOST_MSG:
409	{
410	if (modeGet() != VBOX_DRAG_AND_DROP_MODE_OFF)
411	rc = VINF_SUCCESS;
412	else
413	{
414	LogFlowFunc(("DnD disabled, deferring request\n"));
415	rc = VINF_HGCM_ASYNC_EXECUTE;
416	}
417	break;
418	}
419
420	/* New since protocol v2. */
421	case GUEST_DND_FN_CONNECT:
422	RT_FALL_THROUGH();
423	/* New since VBox 6.1.x. */
424	case GUEST_DND_FN_REPORT_FEATURES:
425	RT_FALL_THROUGH();
426	/* New since VBox 6.1.x. */
427	case GUEST_DND_FN_QUERY_FEATURES:
428	{
429	/*
430	* Never block these calls, as the clients issues those when
431	* initializing and might get stuck if drag and drop is set to "disabled" at
432	* that time.
433	*/
434	rc = VINF_SUCCESS;
435	break;
436	}
437
438	case GUEST_DND_FN_HG_ACK_OP:
439	case GUEST_DND_FN_HG_REQ_DATA:
440	case GUEST_DND_FN_HG_EVT_PROGRESS:
441	{
442	if ( modeGet() == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL
443	\|\| modeGet() == VBOX_DRAG_AND_DROP_MODE_HOST_TO_GUEST)
444	rc = VINF_SUCCESS;
445	else
446	LogFlowFunc(("Host -> Guest DnD mode disabled, failing request\n"));
447	break;
448	}
449
450	case GUEST_DND_FN_GH_ACK_PENDING:
451	case GUEST_DND_FN_GH_SND_DATA_HDR:
452	case GUEST_DND_FN_GH_SND_DATA:
453	case GUEST_DND_FN_GH_SND_DIR:
454	case GUEST_DND_FN_GH_SND_FILE_HDR:
455	case GUEST_DND_FN_GH_SND_FILE_DATA:
456	case GUEST_DND_FN_GH_EVT_ERROR:
457	{
458	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
459	if ( modeGet() == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL
460	\|\| modeGet() == VBOX_DRAG_AND_DROP_MODE_GUEST_TO_HOST)
461	rc = VINF_SUCCESS;
462	else
463	#endif
464	LogFlowFunc(("Guest -> Host DnD mode disabled, failing request\n"));
465	break;
466	}
467
468	default:
469	/* Reach through to DnD manager. */
470	rc = VINF_SUCCESS;
471	break;
472	}
473
474	#ifdef DEBUG_andy
475	LogFlowFunc(("Mode (%RU32) check rc=%Rrc\n", modeGet(), rc));
476	#endif
477
478	#define DO_HOST_CALLBACK(); \
479	if ( RT_SUCCESS(rc) \
480	&& m_SvcCtx.pfnHostCallback) \
481	{ \
482	rc = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function, &data, sizeof(data)); \
483	}
484
485	/*
486	* Lookup client.
487	*/
488	DragAndDropClient *pClient = NULL;
489
490	DnDClientMap::iterator itClient = m_clientMap.find(idClient);
491	if (itClient != m_clientMap.end())
492	{
493	pClient = itClient->second;
494	AssertPtr(pClient);
495	}
496	else
497	{
498	LogFunc(("Client %RU32 was not found\n", idClient));
499	rc = VERR_NOT_FOUND;
500	}
501
502	/* Verifies that an uint32 parameter has the expected buffer size set.
503	* Will set rc to VERR_INVALID_PARAMETER otherwise. See #9777. */
504	#define VERIFY_BUFFER_SIZE_UINT32(a_ParmUInt32, a_SizeExpected) \
505	do { \
506	uint32_t cbTemp = 0; \
507	rc = HGCMSvcGetU32(&a_ParmUInt32, &cbTemp); \
508	ASSERT_GUEST_BREAK(RT_SUCCESS(rc) && cbTemp == a_SizeExpected); \
509	} while (0)
510
511	/* Gets the context ID from the first parameter and store it into the data header.
512	* Then increments idxParm by one if more than one parameter is available. */
513	#define GET_CONTEXT_ID_PARM0() \
514	if (fHasCtxID) \
515	{ \
516	ASSERT_GUEST_BREAK(cParms >= 1); \
517	rc = HGCMSvcGetU32(&paParms[0], &data.hdr.uContextID); \
518	ASSERT_GUEST_BREAK(RT_SUCCESS(rc)); \
519	if (cParms > 1) \
520	idxParm++; \
521	}
522
523	if (rc == VINF_SUCCESS) /* Note: rc might be VINF_HGCM_ASYNC_EXECUTE! */
524	{
525	rc = VERR_INVALID_PARAMETER; /* Play safe by default. */
526
527	/* Whether the client's advertised protocol sends context IDs with commands. */
528	const bool fHasCtxID = pClient->uProtocolVerDeprecated >= 3;
529
530	/* Current parameter index to process. */
531	unsigned idxParm = 0;
532
533	switch (u32Function)
534	{
535	/*
536	* Note: Older VBox versions with enabled DnD guest->host support (< 5.0)
537	* used the same message ID (300) for GUEST_DND_FN_GET_NEXT_HOST_MSG and
538	* HOST_DND_FN_GH_REQ_PENDING, which led this service returning
539	* VERR_INVALID_PARAMETER when the guest wanted to actually
540	* handle HOST_DND_FN_GH_REQ_PENDING.
541	*/
542	case GUEST_DND_FN_GET_NEXT_HOST_MSG:
543	{
544	LogFlowFunc(("GUEST_DND_FN_GET_NEXT_HOST_MSG\n"));
545	if (cParms == 3)
546	{
547	rc = m_pManager->GetNextMsgInfo(&paParms[0].u.uint32 /* uMsg /, &paParms[1].u.uint32 / cParms */);
548	if (RT_FAILURE(rc)) /* No queued messages available? */
549	{
550	if (m_SvcCtx.pfnHostCallback) /* Try asking the host. */
551	{
552	VBOXDNDCBHGGETNEXTHOSTMSG data;
553	RT_ZERO(data);
554	data.hdr.uMagic = CB_MAGIC_DND_HG_GET_NEXT_HOST_MSG;
555	rc = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function, &data, sizeof(data));
556	if (RT_SUCCESS(rc))
557	{
558	paParms[0].u.uint32 = data.uMsg; /* uMsg */
559	paParms[1].u.uint32 = data.cParms; /* cParms */
560	/* Note: paParms[2] was set by the guest as blocking flag. */
561	}
562	}
563	else /* No host callback in place, so drag and drop is not supported by the host. */
564	rc = VERR_NOT_SUPPORTED;
565
566	if (RT_FAILURE(rc))
567	rc = m_pManager->GetNextMsg(u32Function, cParms, paParms);
568
569	/* Some error occurred or no (new) messages available? */
570	if (RT_FAILURE(rc))
571	{
572	uint32_t fFlags = 0;
573	int rc2 = HGCMSvcGetU32(&paParms[2], &fFlags);
574	if ( RT_SUCCESS(rc2)
575	&& fFlags) /* Blocking flag set? */
576	{
577	/* Defer client returning. */
578	rc = VINF_HGCM_ASYNC_EXECUTE;
579	}
580	else
581	rc = VERR_INVALID_PARAMETER;
582
583	LogFlowFunc(("Message queue is empty, returning %Rrc to guest\n", rc));
584	}
585	}
586	}
587	break;
588	}
589	case GUEST_DND_FN_CONNECT:
590	{
591	LogFlowFunc(("GUEST_DND_FN_CONNECT\n"));
592
593	ASSERT_GUEST_BREAK(cParms >= 2);
594
595	VBOXDNDCBCONNECTDATA data;
596	RT_ZERO(data);
597	data.hdr.uMagic = CB_MAGIC_DND_CONNECT;
598
599	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.hdr.uContextID); \
600	ASSERT_GUEST_RC_BREAK(rc);
601	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uProtocolVersion);
602	ASSERT_GUEST_RC_BREAK(rc);
603	rc = HGCMSvcGetU32(&paParms[idxParm], &data.fFlags);
604	ASSERT_GUEST_RC_BREAK(rc);
605
606	unsigned uProtocolVer = 3; /* The protocol version we're going to use. */
607
608	/* Make sure we're only setting a protocl version we're supporting on the host. */
609	if (data.uProtocolVersion > uProtocolVer)
610	data.uProtocolVersion = uProtocolVer;
611
612	pClient->uProtocolVerDeprecated = data.uProtocolVersion;
613
614	/* Return the highest protocol version we're supporting. */
615	AssertBreak(idxParm);
616	ASSERT_GUEST_BREAK(idxParm);
617	paParms[idxParm - 1].u.uint32 = data.uProtocolVersion;
618
619	LogFlowFunc(("Client %RU32 is now using protocol v%RU32\n",
620	pClient->GetClientID(), pClient->uProtocolVerDeprecated));
621
622	DO_HOST_CALLBACK();
623	break;
624	}
625	case GUEST_DND_FN_REPORT_FEATURES:
626	{
627	LogFlowFunc(("GUEST_DND_FN_REPORT_FEATURES\n"));
628	rc = clientReportFeatures(pClient, cParms, paParms);
629	if (RT_SUCCESS(rc))
630	{
631	VBOXDNDCBREPORTFEATURESDATA data;
632	RT_ZERO(data);
633	data.hdr.uMagic = CB_MAGIC_DND_REPORT_FEATURES;
634
635	data.fGuestFeatures0 = pClient->fGuestFeatures0;
636	/* fGuestFeatures1 is not used yet. */
637
638	/* Don't touch initial rc. */
639	int rc2 = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function, &data, sizeof(data));
640	AssertRC(rc2);
641	}
642	break;
643	}
644	case GUEST_DND_FN_QUERY_FEATURES:
645	{
646	LogFlowFunc(("GUEST_DND_FN_QUERY_FEATURES"));
647	rc = clientQueryFeatures(cParms, paParms);
648	break;
649	}
650	case GUEST_DND_FN_HG_ACK_OP:
651	{
652	LogFlowFunc(("GUEST_DND_FN_HG_ACK_OP\n"));
653
654	ASSERT_GUEST_BREAK(cParms >= 2);
655
656	VBOXDNDCBHGACKOPDATA data;
657	RT_ZERO(data);
658	data.hdr.uMagic = CB_MAGIC_DND_HG_ACK_OP;
659
660	GET_CONTEXT_ID_PARM0();
661	rc = HGCMSvcGetU32(&paParms[idxParm], &data.uAction); /* Get drop action. */
662	ASSERT_GUEST_RC_BREAK(rc);
663
664	DO_HOST_CALLBACK();
665	break;
666	}
667	case GUEST_DND_FN_HG_REQ_DATA:
668	{
669	LogFlowFunc(("GUEST_DND_FN_HG_REQ_DATA\n"));
670
671	VBOXDNDCBHGREQDATADATA data;
672	RT_ZERO(data);
673	data.hdr.uMagic = CB_MAGIC_DND_HG_REQ_DATA;
674
675	switch (pClient->uProtocolVerDeprecated)
676	{
677	case 3:
678	{
679	ASSERT_GUEST_BREAK(cParms == 3);
680	GET_CONTEXT_ID_PARM0();
681	rc = HGCMSvcGetPv(&paParms[idxParm++], (void **)&data.pszFormat, &data.cbFormat);
682	ASSERT_GUEST_RC_BREAK(rc);
683	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.cbFormat);
684	break;
685	}
686
687	case 2:
688	RT_FALL_THROUGH();
689	default:
690	{
691	ASSERT_GUEST_BREAK(cParms == 1);
692	rc = HGCMSvcGetPv(&paParms[idxParm], (void**)&data.pszFormat, &data.cbFormat);
693	ASSERT_GUEST_RC_BREAK(rc);
694	break;
695	}
696	}
697
698	DO_HOST_CALLBACK();
699	break;
700	}
701	case GUEST_DND_FN_HG_EVT_PROGRESS:
702	{
703	LogFlowFunc(("GUEST_DND_FN_HG_EVT_PROGRESS\n"));
704
705	ASSERT_GUEST_BREAK(cParms >= 3);
706
707	VBOXDNDCBHGEVTPROGRESSDATA data;
708	RT_ZERO(data);
709	data.hdr.uMagic = CB_MAGIC_DND_HG_EVT_PROGRESS;
710
711	GET_CONTEXT_ID_PARM0();
712	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uStatus);
713	ASSERT_GUEST_RC_BREAK(rc);
714	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uPercentage);
715	ASSERT_GUEST_RC_BREAK(rc);
716	rc = HGCMSvcGetU32(&paParms[idxParm], &data.rc);
717	ASSERT_GUEST_RC_BREAK(rc);
718
719	DO_HOST_CALLBACK();
720	break;
721	}
722	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
723	case GUEST_DND_FN_GH_ACK_PENDING:
724	{
725	LogFlowFunc(("GUEST_DND_FN_GH_ACK_PENDING\n"));
726
727	VBOXDNDCBGHACKPENDINGDATA data;
728	RT_ZERO(data);
729	data.hdr.uMagic = CB_MAGIC_DND_GH_ACK_PENDING;
730
731	switch (pClient->uProtocolVerDeprecated)
732	{
733	case 3:
734	{
735	ASSERT_GUEST_BREAK(cParms == 5);
736	GET_CONTEXT_ID_PARM0();
737	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uDefAction);
738	ASSERT_GUEST_RC_BREAK(rc);
739	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uAllActions);
740	ASSERT_GUEST_RC_BREAK(rc);
741	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pszFormat, &data.cbFormat);
742	ASSERT_GUEST_RC_BREAK(rc);
743	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.cbFormat);
744	break;
745	}
746
747	case 2:
748	default:
749	{
750	ASSERT_GUEST_BREAK(cParms == 3);
751	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uDefAction);
752	ASSERT_GUEST_RC_BREAK(rc);
753	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uAllActions);
754	ASSERT_GUEST_RC_BREAK(rc);
755	rc = HGCMSvcGetPv(&paParms[idxParm], (void**)&data.pszFormat, &data.cbFormat);
756	ASSERT_GUEST_RC_BREAK(rc);
757	break;
758	}
759	}
760
761	DO_HOST_CALLBACK();
762	break;
763	}
764	/* New since protocol v3. */
765	case GUEST_DND_FN_GH_SND_DATA_HDR:
766	{
767	LogFlowFunc(("GUEST_DND_FN_GH_SND_DATA_HDR\n"));
768
769	ASSERT_GUEST_BREAK(cParms == 12);
770
771	VBOXDNDCBSNDDATAHDRDATA data;
772	RT_ZERO(data);
773	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DATA_HDR;
774
775	GET_CONTEXT_ID_PARM0();
776	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.uFlags);
777	ASSERT_GUEST_RC_BREAK(rc);
778	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.uScreenId);
779	ASSERT_GUEST_RC_BREAK(rc);
780	rc = HGCMSvcGetU64(&paParms[idxParm++], &data.data.cbTotal);
781	ASSERT_GUEST_RC_BREAK(rc);
782	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.cbMeta);
783	ASSERT_GUEST_RC_BREAK(rc);
784	ASSERT_GUEST_BREAK(data.data.cbMeta <= data.data.cbTotal);
785	rc = HGCMSvcGetPv(&paParms[idxParm++], &data.data.pvMetaFmt, &data.data.cbMetaFmt);
786	ASSERT_GUEST_RC_BREAK(rc);
787	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.data.cbMetaFmt);
788	rc = HGCMSvcGetU64(&paParms[idxParm++], &data.data.cObjects);
789	ASSERT_GUEST_RC_BREAK(rc);
790	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.enmCompression);
791	ASSERT_GUEST_RC_BREAK(rc);
792	rc = HGCMSvcGetU32(&paParms[idxParm++], (uint32_t *)&data.data.enmChecksumType);
793	ASSERT_GUEST_RC_BREAK(rc);
794	rc = HGCMSvcGetPv(&paParms[idxParm++], &data.data.pvChecksum, &data.data.cbChecksum);
795	ASSERT_GUEST_RC_BREAK(rc);
796	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.data.cbChecksum);
797
798	DO_HOST_CALLBACK();
799	break;
800	}
801	case GUEST_DND_FN_GH_SND_DATA:
802	{
803	LogFlowFunc(("GUEST_DND_FN_GH_SND_DATA\n"));
804
805	switch (pClient->uProtocolVerDeprecated)
806	{
807	case 3:
808	{
809	ASSERT_GUEST_BREAK(cParms == 5);
810
811	VBOXDNDCBSNDDATADATA data;
812	RT_ZERO(data);
813	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DATA;
814
815	GET_CONTEXT_ID_PARM0();
816	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.data.u.v3.pvData, &data.data.u.v3.cbData);
817	ASSERT_GUEST_RC_BREAK(rc);
818	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.data.u.v3.cbData);
819	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.data.u.v3.pvChecksum, &data.data.u.v3.cbChecksum);
820	ASSERT_GUEST_RC_BREAK(rc);
821	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.data.u.v3.cbChecksum);
822
823	DO_HOST_CALLBACK();
824	break;
825	}
826
827	case 2:
828	default:
829	{
830	ASSERT_GUEST_BREAK(cParms == 2);
831
832	VBOXDNDCBSNDDATADATA data;
833	RT_ZERO(data);
834	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DATA;
835
836	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.data.u.v1.pvData, &data.data.u.v1.cbData);
837	ASSERT_GUEST_RC_BREAK(rc);
838	rc = HGCMSvcGetU32(&paParms[idxParm], &data.data.u.v1.cbTotalSize);
839	ASSERT_GUEST_RC_BREAK(rc);
840
841	DO_HOST_CALLBACK();
842	break;
843	}
844	}
845	break;
846	}
847	case GUEST_DND_FN_GH_SND_DIR:
848	{
849	LogFlowFunc(("GUEST_DND_FN_GH_SND_DIR\n"));
850
851	ASSERT_GUEST_BREAK(cParms >= 3);
852
853	VBOXDNDCBSNDDIRDATA data;
854	RT_ZERO(data);
855	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DIR;
856
857	GET_CONTEXT_ID_PARM0();
858	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pszPath, &data.cbPath);
859	ASSERT_GUEST_RC_BREAK(rc);
860	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbPath);
861	rc = HGCMSvcGetU32(&paParms[idxParm], &data.fMode);
862	ASSERT_GUEST_RC_BREAK(rc);
863
864	DO_HOST_CALLBACK();
865	break;
866	}
867	/* New since protocol v2 (>= VBox 5.0). */
868	case GUEST_DND_FN_GH_SND_FILE_HDR:
869	{
870	LogFlowFunc(("GUEST_DND_FN_GH_SND_FILE_HDR\n"));
871
872	ASSERT_GUEST_BREAK(cParms == 6);
873
874	VBOXDNDCBSNDFILEHDRDATA data;
875	RT_ZERO(data);
876	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_HDR;
877
878	GET_CONTEXT_ID_PARM0();
879	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pszFilePath, &data.cbFilePath);
880	ASSERT_GUEST_RC_BREAK(rc);
881	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbFilePath);
882	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.fFlags);
883	ASSERT_GUEST_RC_BREAK(rc);
884	rc = HGCMSvcGetU32(&paParms[idxParm++], &data.fMode);
885	ASSERT_GUEST_RC_BREAK(rc);
886	rc = HGCMSvcGetU64(&paParms[idxParm], &data.cbSize);
887	ASSERT_GUEST_RC_BREAK(rc);
888
889	DO_HOST_CALLBACK();
890	break;
891	}
892	case GUEST_DND_FN_GH_SND_FILE_DATA:
893	{
894	LogFlowFunc(("GUEST_DND_FN_GH_SND_FILE_DATA\n"));
895
896	switch (pClient->uProtocolVerDeprecated)
897	{
898	/* Protocol v3 adds (optional) checksums. */
899	case 3:
900	{
901	ASSERT_GUEST_BREAK(cParms == 5);
902
903	VBOXDNDCBSNDFILEDATADATA data;
904	RT_ZERO(data);
905	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_DATA;
906
907	GET_CONTEXT_ID_PARM0();
908	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pvData, &data.cbData);
909	ASSERT_GUEST_RC_BREAK(rc);
910	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbData);
911	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.u.v3.pvChecksum, &data.u.v3.cbChecksum);
912	ASSERT_GUEST_RC_BREAK(rc);
913	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.u.v3.cbChecksum);
914
915	DO_HOST_CALLBACK();
916	break;
917	}
918	/* Protocol v2 only sends the next data chunks to reduce traffic. */
919	case 2:
920	{
921	ASSERT_GUEST_BREAK(cParms == 3);
922
923	VBOXDNDCBSNDFILEDATADATA data;
924	RT_ZERO(data);
925	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_DATA;
926
927	GET_CONTEXT_ID_PARM0();
928	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pvData, &data.cbData);
929	ASSERT_GUEST_RC_BREAK(rc);
930	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.cbData);
931
932	DO_HOST_CALLBACK();
933	break;
934	}
935	/* Protocol v1 sends the file path and attributes for every file chunk (!). */
936	default:
937	{
938	ASSERT_GUEST_BREAK(cParms == 5);
939
940	VBOXDNDCBSNDFILEDATADATA data;
941	RT_ZERO(data);
942	data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_DATA;
943
944	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.u.v1.pszFilePath, &data.u.v1.cbFilePath);
945	ASSERT_GUEST_RC_BREAK(rc);
946	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.u.v1.cbFilePath);
947	rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pvData, &data.cbData);
948	ASSERT_GUEST_RC_BREAK(rc);
949	VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbData);
950	rc = HGCMSvcGetU32(&paParms[idxParm], &data.u.v1.fMode);
951	ASSERT_GUEST_RC_BREAK(rc);
952
953	DO_HOST_CALLBACK();
954	break;
955	}
956	}
957	break;
958	}
959	case GUEST_DND_FN_GH_EVT_ERROR:
960	{
961	LogFlowFunc(("GUEST_DND_FN_GH_EVT_ERROR\n"));
962
963	ASSERT_GUEST_BREAK(cParms >= 1);
964
965	VBOXDNDCBEVTERRORDATA data;
966	RT_ZERO(data);
967	data.hdr.uMagic = CB_MAGIC_DND_GH_EVT_ERROR;
968
969	GET_CONTEXT_ID_PARM0();
970	rc = HGCMSvcGetU32(&paParms[idxParm], (uint32_t *)&data.rc);
971	ASSERT_GUEST_RC_BREAK(rc);
972
973	DO_HOST_CALLBACK();
974	break;
975	}
976	#endif /* VBOX_WITH_DRAG_AND_DROP_GH */
977
978	default:
979	{
980	/* All other messages are handled by the DnD manager. */
981	rc = m_pManager->GetNextMsg(u32Function, cParms, paParms);
982	if (rc == VERR_NO_DATA) /* Manager has no new messsages? Try asking the host. */
983	{
984	if (m_SvcCtx.pfnHostCallback)
985	{
986	VBOXDNDCBHGGETNEXTHOSTMSGDATA data;
987	RT_ZERO(data);
988
989	data.hdr.uMagic = VBOX_DND_CB_MAGIC_MAKE(0 /* uFn /, 0 / uVer */);
990
991	data.uMsg = u32Function;
992	data.cParms = cParms;
993	data.paParms = paParms;
994
995	rc = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function,
996	&data, sizeof(data));
997	if (RT_SUCCESS(rc))
998	{
999	cParms = data.cParms;
1000	paParms = data.paParms;
1001	}
1002	else
1003	{
1004	/*
1005	* In case the guest is too fast asking for the next message
1006	* and the host did not supply it yet, just defer the client's
1007	* return until a response from the host available.
1008	*/
1009	LogFlowFunc(("No new messages from the host (yet), deferring request: %Rrc\n", rc));
1010	rc = VINF_HGCM_ASYNC_EXECUTE;
1011	}
1012	}
1013	else /* No host callback in place, so drag and drop is not supported by the host. */
1014	rc = VERR_NOT_SUPPORTED;
1015	}
1016	break;
1017	}
1018	}
1019	}
1020
1021	#undef VERIFY_BUFFER_SIZE_UINT32
1022
1023	/*
1024	* If async execution is requested, we didn't notify the guest yet about
1025	* completion. The client is queued into the waiters list and will be
1026	* notified as soon as a new event is available.
1027	*/
1028	if (rc == VINF_HGCM_ASYNC_EXECUTE)
1029	{
1030	try
1031	{
1032	AssertPtr(pClient);
1033	pClient->SetDeferred(callHandle, u32Function, cParms, paParms);
1034	m_clientQueue.push_back(idClient);
1035	}
1036	catch (std::bad_alloc &)
1037	{
1038	rc = VERR_NO_MEMORY;
1039	/* Don't report to guest. */
1040	}
1041	}
1042	else if (pClient)
1043	{
1044	/* Complete the call on the guest side. */
1045	pClient->Complete(callHandle, rc);
1046	}
1047	else
1048	{
1049	AssertMsgFailed(("Guest call failed with %Rrc\n", rc));
1050	rc = VERR_NOT_IMPLEMENTED;
1051	}
1052
1053	LogFlowFunc(("Returning rc=%Rrc\n", rc));
1054	}
1055
1056	int DragAndDropService::hostCall(uint32_t u32Function,
1057	uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
1058	{
1059	LogFlowFunc(("u32Function=%RU32, cParms=%RU32, cClients=%zu, cQueue=%zu\n",
1060	u32Function, cParms, m_clientMap.size(), m_clientQueue.size()));
1061
1062	int rc;
1063	bool fSendToGuest = false; /* Whether to send the message down to the guest side or not. */
1064
1065	switch (u32Function)
1066	{
1067	case HOST_DND_FN_SET_MODE:
1068	{
1069	if (cParms != 1)
1070	rc = VERR_INVALID_PARAMETER;
1071	else if (paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT)
1072	rc = VERR_INVALID_PARAMETER;
1073	else
1074	rc = modeSet(paParms[0].u.uint32);
1075	break;
1076	}
1077
1078	case HOST_DND_FN_CANCEL:
1079	{
1080	LogFlowFunc(("Cancelling all waiting clients ...\n"));
1081
1082	/* Reset the message queue as the host cancelled the whole operation. */
1083	m_pManager->Reset();
1084
1085	rc = m_pManager->AddMsg(u32Function, cParms, paParms, true /* fAppend */);
1086	if (RT_FAILURE(rc))
1087	{
1088	AssertMsgFailed(("Adding new message of type=%RU32 failed with rc=%Rrc\n", u32Function, rc));
1089	break;
1090	}
1091
1092	/*
1093	* Wake up all deferred clients and tell them to process
1094	* the cancelling message next.
1095	*/
1096	DnDClientQueue::iterator itQueue = m_clientQueue.begin();
1097	while (itQueue != m_clientQueue.end())
1098	{
1099	DnDClientMap::iterator itClient = m_clientMap.find(*itQueue);
1100	Assert(itClient != m_clientMap.end());
1101
1102	DragAndDropClient *pClient = itClient->second;
1103	AssertPtr(pClient);
1104
1105	int rc2 = pClient->SetDeferredMsgInfo(HOST_DND_FN_CANCEL,
1106	/* Protocol v3+ also contains the context ID. */
1107	pClient->uProtocolVerDeprecated >= 3 ? 1 : 0);
1108	pClient->CompleteDeferred(rc2);
1109
1110	m_clientQueue.erase(itQueue);
1111	itQueue = m_clientQueue.begin();
1112	}
1113
1114	Assert(m_clientQueue.empty());
1115
1116	/* Tell the host that everything went well. */
1117	rc = VINF_SUCCESS;
1118	break;
1119	}
1120
1121	case HOST_DND_FN_HG_EVT_ENTER:
1122	{
1123	/* Reset the message queue as a new DnD operation just began. */
1124	m_pManager->Reset();
1125
1126	fSendToGuest = true;
1127	rc = VINF_SUCCESS;
1128	break;
1129	}
1130
1131	default:
1132	{
1133	fSendToGuest = true;
1134	rc = VINF_SUCCESS;
1135	break;
1136	}
1137	}
1138
1139	do /* goto avoidance break-loop. */
1140	{
1141	if (fSendToGuest)
1142	{
1143	if (modeGet() == VBOX_DRAG_AND_DROP_MODE_OFF)
1144	{
1145	/* Tell the host that a wrong drag'n drop mode is set. */
1146	rc = VERR_ACCESS_DENIED;
1147	break;
1148	}
1149
1150	if (m_clientMap.empty()) /* At least one client on the guest connected? */
1151	{
1152	/*
1153	* Tell the host that the guest does not support drag'n drop.
1154	* This might happen due to not installed Guest Additions or
1155	* not running VBoxTray/VBoxClient.
1156	*/
1157	rc = VERR_NOT_SUPPORTED;
1158	break;
1159	}
1160
1161	rc = m_pManager->AddMsg(u32Function, cParms, paParms, true /* fAppend */);
1162	if (RT_FAILURE(rc))
1163	{
1164	AssertMsgFailed(("Adding new message of type=%RU32 failed with rc=%Rrc\n", u32Function, rc));
1165	break;
1166	}
1167
1168	/* Any clients in our queue ready for processing the next command? */
1169	if (m_clientQueue.empty())
1170	{
1171	LogFlowFunc(("All clients (%zu) busy -- delaying execution\n", m_clientMap.size()));
1172	break;
1173	}
1174
1175	uint32_t uClientNext = m_clientQueue.front();
1176	DnDClientMap::iterator itClientNext = m_clientMap.find(uClientNext);
1177	Assert(itClientNext != m_clientMap.end());
1178
1179	DragAndDropClient *pClient = itClientNext->second;
1180	AssertPtr(pClient);
1181
1182	/*
1183	* Check if this was a request for getting the next host
1184	* message. If so, return the message ID and the parameter
1185	* count. The message itself has to be queued.
1186	*/
1187	uint32_t uMsgClient = pClient->GetMsgType();
1188
1189	uint32_t uMsgNext = 0;
1190	uint32_t cParmsNext = 0;
1191	int rcNext = m_pManager->GetNextMsgInfo(&uMsgNext, &cParmsNext);
1192
1193	LogFlowFunc(("uMsgClient=%RU32, uMsgNext=%RU32, cParmsNext=%RU32, rcNext=%Rrc\n",
1194	uMsgClient, uMsgNext, cParmsNext, rcNext));
1195
1196	if (RT_SUCCESS(rcNext))
1197	{
1198	if (uMsgClient == GUEST_DND_FN_GET_NEXT_HOST_MSG)
1199	{
1200	rc = pClient->SetDeferredMsgInfo(uMsgNext, cParmsNext);
1201
1202	/* Note: Report the current rc back to the guest. */
1203	pClient->CompleteDeferred(rc);
1204	}
1205	/*
1206	* Does the message the client is waiting for match the message
1207	* next in the queue? Process it right away then.
1208	*/
1209	else if (uMsgClient == uMsgNext)
1210	{
1211	rc = m_pManager->GetNextMsg(u32Function, cParms, paParms);
1212
1213	/* Note: Report the current rc back to the guest. */
1214	pClient->CompleteDeferred(rc);
1215	}
1216	else /* Should not happen; cancel the operation on the guest. */
1217	{
1218	LogFunc(("Client ID=%RU32 in wrong state with uMsg=%RU32 (next message in queue: %RU32), cancelling\n",
1219	pClient->GetClientID(), uMsgClient, uMsgNext));
1220
1221	pClient->CompleteDeferred(VERR_CANCELLED);
1222	}
1223
1224	m_clientQueue.pop_front();
1225	}
1226
1227	} /* fSendToGuest */
1228
1229	} while (0); /* To use breaks. */
1230
1231	LogFlowFuncLeaveRC(rc);
1232	return rc;
1233	}
1234
1235	DECLCALLBACK(int) DragAndDropService::progressCallback(uint32_t uStatus, uint32_t uPercentage, int rc, void *pvUser)
1236	{
1237	AssertPtrReturn(pvUser, VERR_INVALID_POINTER);
1238
1239	DragAndDropService pSelf = static_cast<DragAndDropService >(pvUser);
1240	AssertPtr(pSelf);
1241
1242	if (pSelf->m_SvcCtx.pfnHostCallback)
1243	{
1244	LogFlowFunc(("GUEST_DND_FN_HG_EVT_PROGRESS: uStatus=%RU32, uPercentage=%RU32, rc=%Rrc\n",
1245	uStatus, uPercentage, rc));
1246
1247	VBOXDNDCBHGEVTPROGRESSDATA data;
1248	data.hdr.uMagic = CB_MAGIC_DND_HG_EVT_PROGRESS;
1249	data.uPercentage = RT_MIN(uPercentage, 100);
1250	data.uStatus = uStatus;
1251	data.rc = rc; /** @todo uin32_t vs. int. */
1252
1253	return pSelf->m_SvcCtx.pfnHostCallback(pSelf->m_SvcCtx.pvHostData,
1254	GUEST_DND_FN_HG_EVT_PROGRESS,
1255	&data, sizeof(data));
1256	}
1257
1258	return VINF_SUCCESS;
1259	}
1260
1261	/**
1262	* @copydoc FNVBOXHGCMSVCLOAD
1263	*/
1264	extern "C" DECLCALLBACK(DECLEXPORT(int)) VBoxHGCMSvcLoad(VBOXHGCMSVCFNTABLE *pTable)
1265	{
1266	return DragAndDropService::svcLoad(pTable);
1267	}
1268

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source: vbox/trunk/src/VBox/HostServices/DragAndDrop/VBoxDragAndDropSvc.cpp@ 86011

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