service.cpp@ 76474

Last change on this file since 76474 was 76389, checked in by vboxsync, 6 years ago
VBox/sup.h: Don't include VBox/err.h for no good reason. bugref:9344
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1	/* $Id: service.cpp 76389 2018-12-23 01:39:48Z vboxsync $ */
2	/** @file
3	* Shared Clipboard Service - Host service entry points.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 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
19	/** @page pg_hostclip The Shared Clipboard Host Service
20	*
21	* The shared clipboard host service provides a proxy between the host's
22	* clipboard and a similar proxy running on a guest. The service is split
23	* into a platform-independent core and platform-specific backends. The
24	* service defines two communication protocols - one to communicate with the
25	* clipboard service running on the guest, and one to communicate with the
26	* backend. These will be described in a very skeletal fashion here.
27	*
28	* @section sec_hostclip_guest_proto The guest communication protocol
29	*
30	* The guest clipboard service communicates with the host service via HGCM
31	* (the host service runs as an HGCM service). The guest clipboard must
32	* connect to the host service before all else (Windows hosts currently only
33	* support one simultaneous connection). Once it has connected, it can send
34	* HGCM messages to the host services, some of which will receive replies from
35	* the host. The host can only reply to a guest message, it cannot initiate
36	* any communication. The guest can in theory send any number of messages in
37	* parallel (see the descriptions of the messages for the practice), and the
38	* host will receive these in sequence, and may reply to them at once
39	* (releasing the caller in the guest) or defer the reply until later.
40	*
41	* There are currently four messages defined. The first is
42	* VBOX_SHARED_CLIPBOARD_FN_GET_HOST_MSG, which waits for a message from the
43	* host. Host messages currently defined are
44	* VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT (unused),
45	* VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA (request that the guest send the
46	* contents of its clipboard to the host) and
47	* VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS (to notify the guest that new
48	* clipboard data is available). If a host message is sent while the guest is
49	* not waiting, it will be queued until the guest requests it. At most one
50	* host message of each type will be kept in the queue. The host code only
51	* supports a single simultaneous VBOX_SHARED_CLIPBOARD_FN_GET_HOST_MSG call
52	* from the guest.
53	*
54	* The second guest message is VBOX_SHARED_CLIPBOARD_FN_FORMATS, which tells
55	* the host that the guest has new clipboard data available. The third is
56	* VBOX_SHARED_CLIPBOARD_FN_READ_DATA, which asks the host to send its
57	* clipboard data and waits until it arrives. The host supports at most one
58	* simultaneous VBOX_SHARED_CLIPBOARD_FN_READ_DATA call from the guest - if a
59	* second call is made before the first has returned, the first will be
60	* aborted.
61	*
62	* The last guest message is VBOX_SHARED_CLIPBOARD_FN_WRITE_DATA, which is
63	* used to send the contents of the guest clipboard to the host. This call
64	* should be used after the host has requested data from the guest.
65	*
66	* @section sec_hostclip_backend_proto The communication protocol with the
67	* platform-specific backend
68	*
69	* This section may be written in the future :)
70	*/
71
72
73	/*********************************************************************************************************************************
74	* Header Files *
75	*********************************************************************************************************************************/
76	#define LOG_GROUP LOG_GROUP_SHARED_CLIPBOARD
77	#include <VBox/HostServices/VBoxClipboardSvc.h>
78	#include <VBox/HostServices/VBoxClipboardExt.h>
79
80	#include <iprt/alloc.h>
81	#include <iprt/string.h>
82	#include <iprt/assert.h>
83	#include <iprt/critsect.h>
84	#include <VBox/err.h>
85	#include <VBox/vmm/ssm.h>
86
87	#include "VBoxClipboard.h"
88
89
90	/*********************************************************************************************************************************
91	* Global Variables *
92	*********************************************************************************************************************************/
93	static PVBOXHGCMSVCHELPERS g_pHelpers;
94
95	static RTCRITSECT critsect;
96	static uint32_t g_u32Mode;
97
98	static PFNHGCMSVCEXT g_pfnExtension;
99	static void *g_pvExtension;
100
101	static VBOXCLIPBOARDCLIENTDATA *g_pClient;
102
103	/* Serialization of data reading and format announcements from the RDP client. */
104	static bool g_fReadingData = false;
105	static bool g_fDelayedAnnouncement = false;
106	static uint32_t g_u32DelayedFormats = 0;
107
108	/** Is the clipboard running in headless mode? */
109	static bool g_fHeadless = false;
110
111
112	static void VBoxHGCMParmUInt32Set (VBOXHGCMSVCPARM *pParm, uint32_t u32)
113	{
114	pParm->type = VBOX_HGCM_SVC_PARM_32BIT;
115	pParm->u.uint32 = u32;
116	}
117
118	static int VBoxHGCMParmUInt32Get (VBOXHGCMSVCPARM pParm, uint32_t pu32)
119	{
120	if (pParm->type == VBOX_HGCM_SVC_PARM_32BIT)
121	{
122	*pu32 = pParm->u.uint32;
123	return VINF_SUCCESS;
124	}
125
126	return VERR_INVALID_PARAMETER;
127	}
128
129	#if 0
130	static void VBoxHGCMParmPtrSet (VBOXHGCMSVCPARM pParm, void pv, uint32_t cb)
131	{
132	pParm->type = VBOX_HGCM_SVC_PARM_PTR;
133	pParm->u.pointer.size = cb;
134	pParm->u.pointer.addr = pv;
135	}
136	#endif
137
138	static int VBoxHGCMParmPtrGet (VBOXHGCMSVCPARM pParm, void ppv, uint32_t pcb)
139	{
140	if (pParm->type == VBOX_HGCM_SVC_PARM_PTR)
141	{
142	*ppv = pParm->u.pointer.addr;
143	*pcb = pParm->u.pointer.size;
144	return VINF_SUCCESS;
145	}
146
147	return VERR_INVALID_PARAMETER;
148	}
149
150
151	static uint32_t vboxSvcClipboardMode (void)
152	{
153	return g_u32Mode;
154	}
155
156	#ifdef UNIT_TEST
157	/** Testing interface, getter for clipboard mode */
158	uint32_t TestClipSvcGetMode(void)
159	{
160	return vboxSvcClipboardMode();
161	}
162	#endif
163
164	/** Getter for headless setting */
165	bool vboxSvcClipboardGetHeadless(void)
166	{
167	return g_fHeadless;
168	}
169
170	static void vboxSvcClipboardModeSet (uint32_t u32Mode)
171	{
172	switch (u32Mode)
173	{
174	case VBOX_SHARED_CLIPBOARD_MODE_OFF:
175	case VBOX_SHARED_CLIPBOARD_MODE_HOST_TO_GUEST:
176	case VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST:
177	case VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL:
178	g_u32Mode = u32Mode;
179	break;
180
181	default:
182	g_u32Mode = VBOX_SHARED_CLIPBOARD_MODE_OFF;
183	}
184	}
185
186	bool vboxSvcClipboardLock (void)
187	{
188	return RT_SUCCESS(RTCritSectEnter (&critsect));
189	}
190
191	void vboxSvcClipboardUnlock (void)
192	{
193	RTCritSectLeave (&critsect);
194	}
195
196	/* Set the HGCM parameters according to pending messages.
197	* Executed under the clipboard lock.
198	*/
199	static bool vboxSvcClipboardReturnMsg (VBOXCLIPBOARDCLIENTDATA *pClient, VBOXHGCMSVCPARM paParms[])
200	{
201	/* Message priority is taken into account. */
202	if (pClient->fMsgQuit)
203	{
204	LogRelFlow(("vboxSvcClipboardReturnMsg: Quit\n"));
205	VBoxHGCMParmUInt32Set (&paParms[0], VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT);
206	VBoxHGCMParmUInt32Set (&paParms[1], 0);
207	pClient->fMsgQuit = false;
208	}
209	else if (pClient->fMsgReadData)
210	{
211	uint32_t fFormat = 0;
212
213	LogRelFlow(("vboxSvcClipboardReturnMsg: ReadData %02X\n", pClient->u32RequestedFormat));
214	if (pClient->u32RequestedFormat & VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
215	fFormat = VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT;
216	else if (pClient->u32RequestedFormat & VBOX_SHARED_CLIPBOARD_FMT_BITMAP)
217	fFormat = VBOX_SHARED_CLIPBOARD_FMT_BITMAP;
218	else if (pClient->u32RequestedFormat & VBOX_SHARED_CLIPBOARD_FMT_HTML)
219	fFormat = VBOX_SHARED_CLIPBOARD_FMT_HTML;
220	else
221	AssertStmt(pClient->u32RequestedFormat == 0, pClient->u32RequestedFormat = 0);
222	pClient->u32RequestedFormat &= ~fFormat;
223	VBoxHGCMParmUInt32Set (&paParms[0], VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA);
224	VBoxHGCMParmUInt32Set (&paParms[1], fFormat);
225	if (pClient->u32RequestedFormat == 0)
226	pClient->fMsgReadData = false;
227	}
228	else if (pClient->fMsgFormats)
229	{
230	LogRelFlow(("vboxSvcClipboardReturnMsg: Formats %02X\n", pClient->u32AvailableFormats));
231	VBoxHGCMParmUInt32Set (&paParms[0], VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS);
232	VBoxHGCMParmUInt32Set (&paParms[1], pClient->u32AvailableFormats);
233	pClient->fMsgFormats = false;
234	}
235	else
236	{
237	/* No pending messages. */
238	LogRelFlow(("vboxSvcClipboardReturnMsg: no message\n"));
239	return false;
240	}
241
242	/* Message information assigned. */
243	return true;
244	}
245
246	void vboxSvcClipboardReportMsg (VBOXCLIPBOARDCLIENTDATA *pClient, uint32_t u32Msg, uint32_t u32Formats)
247	{
248	if (vboxSvcClipboardLock ())
249	{
250	switch (u32Msg)
251	{
252	case VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT:
253	{
254	LogRelFlow(("vboxSvcClipboardReportMsg: Quit\n"));
255	pClient->fMsgQuit = true;
256	} break;
257	case VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA:
258	{
259	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST
260	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
261	{
262	/* Skip the message. */
263	break;
264	}
265
266	LogRelFlow(("vboxSvcClipboardReportMsg: ReadData %02X\n", u32Formats));
267	pClient->u32RequestedFormat = u32Formats;
268	pClient->fMsgReadData = true;
269	} break;
270	case VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS:
271	{
272	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_HOST_TO_GUEST
273	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
274	{
275	/* Skip the message. */
276	break;
277	}
278
279	LogRelFlow(("vboxSvcClipboardReportMsg: Formats %02X\n", u32Formats));
280	pClient->u32AvailableFormats = u32Formats;
281	pClient->fMsgFormats = true;
282	} break;
283	default:
284	{
285	/* Invalid message. */
286	LogRelFlow(("vboxSvcClipboardReportMsg: invalid message %d\n", u32Msg));
287	} break;
288	}
289
290	if (pClient->fAsync)
291	{
292	/* The client waits for a response. */
293	bool fMessageReturned = vboxSvcClipboardReturnMsg (pClient, pClient->async.paParms);
294
295	/* Make a copy of the handle. */
296	VBOXHGCMCALLHANDLE callHandle = pClient->async.callHandle;
297
298	if (fMessageReturned)
299	{
300	/* There is a response. */
301	pClient->fAsync = false;
302	}
303
304	vboxSvcClipboardUnlock ();
305
306	if (fMessageReturned)
307	{
308	LogRelFlow(("vboxSvcClipboardReportMsg: CallComplete\n"));
309	g_pHelpers->pfnCallComplete (callHandle, VINF_SUCCESS);
310	}
311	}
312	else
313	{
314	vboxSvcClipboardUnlock ();
315	}
316	}
317	}
318
319	static int svcInit (void)
320	{
321	int rc = RTCritSectInit (&critsect);
322
323	if (RT_SUCCESS (rc))
324	{
325	vboxSvcClipboardModeSet (VBOX_SHARED_CLIPBOARD_MODE_OFF);
326
327	rc = vboxClipboardInit ();
328
329	/* Clean up on failure, because 'svnUnload' will not be called
330	* if the 'svcInit' returns an error.
331	*/
332	if (RT_FAILURE (rc))
333	{
334	RTCritSectDelete (&critsect);
335	}
336	}
337
338	return rc;
339	}
340
341	static DECLCALLBACK(int) svcUnload (void *)
342	{
343	vboxClipboardDestroy ();
344	RTCritSectDelete (&critsect);
345	return VINF_SUCCESS;
346	}
347
348	/**
349	* Disconnect the host side of the shared clipboard and send a "host disconnected" message
350	* to the guest side.
351	*/
352	static DECLCALLBACK(int) svcDisconnect (void , uint32_t u32ClientID, void pvClient)
353	{
354	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
355
356	LogRel2(("svcDisconnect: u32ClientID = %d\n", u32ClientID));
357
358	vboxSvcClipboardReportMsg (pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT, 0);
359
360	vboxSvcClipboardCompleteReadData(pClient, VERR_NO_DATA, 0);
361
362	vboxClipboardDisconnect (pClient);
363
364	memset (pClient, 0, sizeof (*pClient));
365
366	g_pClient = NULL;
367
368	return VINF_SUCCESS;
369	}
370
371	static DECLCALLBACK(int) svcConnect (void , uint32_t u32ClientID, void pvClient, uint32_t fRequestor, bool fRestoring)
372	{
373	RT_NOREF(fRequestor, fRestoring);
374	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
375
376	int rc = VINF_SUCCESS;
377
378	/* If there is already a client connected then we want to release it first. */
379	if (g_pClient != NULL)
380	{
381	uint32_t u32OldClientID = g_pClient->u32ClientID;
382
383	svcDisconnect(NULL, u32OldClientID, g_pClient);
384	/* And free the resources in the hgcm subsystem. */
385	g_pHelpers->pfnDisconnectClient(g_pHelpers->pvInstance, u32OldClientID);
386	}
387
388	/* Register the client. */
389	memset (pClient, 0, sizeof (*pClient));
390
391	pClient->u32ClientID = u32ClientID;
392
393	rc = vboxClipboardConnect (pClient, vboxSvcClipboardGetHeadless());
394
395	if (RT_SUCCESS (rc))
396	{
397	g_pClient = pClient;
398	}
399
400	LogRel2(("vboxClipboardConnect: rc = %Rrc\n", rc));
401
402	return rc;
403	}
404
405	static DECLCALLBACK(void) svcCall (void *,
406	VBOXHGCMCALLHANDLE callHandle,
407	uint32_t u32ClientID,
408	void *pvClient,
409	uint32_t u32Function,
410	uint32_t cParms,
411	VBOXHGCMSVCPARM paParms[],
412	uint64_t tsArrival)
413	{
414	RT_NOREF_PV(tsArrival);
415	int rc = VINF_SUCCESS;
416
417	LogRel2(("svcCall: u32ClientID = %d, fn = %d, cParms = %d, pparms = %d\n",
418	u32ClientID, u32Function, cParms, paParms));
419
420	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
421
422	bool fAsynchronousProcessing = false;
423
424	#ifdef DEBUG
425	uint32_t i;
426
427	for (i = 0; i < cParms; i++)
428	{
429	/** @todo parameters other than 32 bit */
430	LogRel2((" pparms[%d]: type %d value %d\n", i, paParms[i].type, paParms[i].u.uint32));
431	}
432	#endif
433
434	switch (u32Function)
435	{
436	case VBOX_SHARED_CLIPBOARD_FN_GET_HOST_MSG:
437	{
438	/* The quest requests a host message. */
439	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_GET_HOST_MSG\n"));
440
441	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_GET_HOST_MSG)
442	{
443	rc = VERR_INVALID_PARAMETER;
444	}
445	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* msg */
446	\|\| paParms[1].type != VBOX_HGCM_SVC_PARM_32BIT /* formats */
447	)
448	{
449	rc = VERR_INVALID_PARAMETER;
450	}
451	else
452	{
453	/* Atomically verify the client's state. */
454	if (vboxSvcClipboardLock ())
455	{
456	bool fMessageReturned = vboxSvcClipboardReturnMsg (pClient, paParms);
457
458	if (fMessageReturned)
459	{
460	/* Just return to the caller. */
461	pClient->fAsync = false;
462	}
463	else
464	{
465	/* No event available at the time. Process asynchronously. */
466	fAsynchronousProcessing = true;
467
468	pClient->fAsync = true;
469	pClient->async.callHandle = callHandle;
470	pClient->async.paParms = paParms;
471
472	LogRel2(("svcCall: async.\n"));
473	}
474
475	vboxSvcClipboardUnlock ();
476	}
477	else
478	{
479	rc = VERR_NOT_SUPPORTED;
480	}
481	}
482	} break;
483
484	case VBOX_SHARED_CLIPBOARD_FN_FORMATS:
485	{
486	/* The guest reports that some formats are available. */
487	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_FORMATS\n"));
488
489	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_FORMATS)
490	{
491	rc = VERR_INVALID_PARAMETER;
492	}
493	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* formats */
494	)
495	{
496	rc = VERR_INVALID_PARAMETER;
497	}
498	else
499	{
500	uint32_t u32Formats;
501
502	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Formats);
503
504	if (RT_SUCCESS (rc))
505	{
506	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST
507	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
508	{
509	rc = VERR_NOT_SUPPORTED;
510	break;
511	}
512
513	if (g_pfnExtension)
514	{
515	VBOXCLIPBOARDEXTPARMS parms;
516
517	parms.u32Format = u32Formats;
518
519	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_FORMAT_ANNOUNCE, &parms, sizeof (parms));
520	}
521	else
522	{
523	vboxClipboardFormatAnnounce (pClient, u32Formats);
524	}
525	}
526	}
527	} break;
528
529	case VBOX_SHARED_CLIPBOARD_FN_READ_DATA:
530	{
531	/* The guest wants to read data in the given format. */
532	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_READ_DATA\n"));
533
534	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_READ_DATA)
535	{
536	rc = VERR_INVALID_PARAMETER;
537	}
538	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* format */
539	\|\| paParms[1].type != VBOX_HGCM_SVC_PARM_PTR /* ptr */
540	\|\| paParms[2].type != VBOX_HGCM_SVC_PARM_32BIT /* size */
541	)
542	{
543	rc = VERR_INVALID_PARAMETER;
544	}
545	else
546	{
547	uint32_t u32Format;
548	void *pv;
549	uint32_t cb;
550
551	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Format);
552
553	if (RT_SUCCESS (rc))
554	{
555	rc = VBoxHGCMParmPtrGet (&paParms[1], &pv, &cb);
556
557	if (RT_SUCCESS (rc))
558	{
559	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_HOST_TO_GUEST
560	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
561	{
562	rc = VERR_NOT_SUPPORTED;
563	break;
564	}
565
566	uint32_t cbActual = 0;
567
568	if (g_pfnExtension)
569	{
570	VBOXCLIPBOARDEXTPARMS parms;
571
572	parms.u32Format = u32Format;
573	parms.u.pvData = pv;
574	parms.cbData = cb;
575
576	g_fReadingData = true;
577	rc = g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_DATA_READ, &parms, sizeof (parms));
578	LogRelFlow(("DATA: g_fDelayedAnnouncement = %d, g_u32DelayedFormats = 0x%x\n", g_fDelayedAnnouncement, g_u32DelayedFormats));
579	if (g_fDelayedAnnouncement)
580	{
581	vboxSvcClipboardReportMsg (g_pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS, g_u32DelayedFormats);
582	g_fDelayedAnnouncement = false;
583	g_u32DelayedFormats = 0;
584	}
585	g_fReadingData = false;
586
587	if (RT_SUCCESS (rc))
588	{
589	cbActual = parms.cbData;
590	}
591	}
592	else
593	{
594	/* Release any other pending read, as we only
595	* support one pending read at one time. */
596	vboxSvcClipboardCompleteReadData(pClient, VERR_NO_DATA, 0);
597	rc = vboxClipboardReadData (pClient, u32Format, pv, cb, &cbActual);
598	}
599
600	/* Remember our read request until it is completed.
601	* See the protocol description above for more
602	* information. */
603	if (rc == VINF_HGCM_ASYNC_EXECUTE)
604	{
605	if (vboxSvcClipboardLock())
606	{
607	pClient->asyncRead.callHandle = callHandle;
608	pClient->asyncRead.paParms = paParms;
609	pClient->fReadPending = true;
610	fAsynchronousProcessing = true;
611	vboxSvcClipboardUnlock();
612	}
613	else
614	rc = VERR_NOT_SUPPORTED;
615	}
616	else if (RT_SUCCESS (rc))
617	{
618	VBoxHGCMParmUInt32Set (&paParms[2], cbActual);
619	}
620	}
621	}
622	}
623	} break;
624
625	case VBOX_SHARED_CLIPBOARD_FN_WRITE_DATA:
626	{
627	/* The guest writes the requested data. */
628	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_WRITE_DATA\n"));
629
630	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_WRITE_DATA)
631	{
632	rc = VERR_INVALID_PARAMETER;
633	}
634	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* format */
635	\|\| paParms[1].type != VBOX_HGCM_SVC_PARM_PTR /* ptr */
636	)
637	{
638	rc = VERR_INVALID_PARAMETER;
639	}
640	else
641	{
642	void *pv;
643	uint32_t cb;
644	uint32_t u32Format;
645
646	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Format);
647
648	if (RT_SUCCESS (rc))
649	{
650	rc = VBoxHGCMParmPtrGet (&paParms[1], &pv, &cb);
651
652	if (RT_SUCCESS (rc))
653	{
654	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST
655	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
656	{
657	rc = VERR_NOT_SUPPORTED;
658	break;
659	}
660
661	if (g_pfnExtension)
662	{
663	VBOXCLIPBOARDEXTPARMS parms;
664
665	parms.u32Format = u32Format;
666	parms.u.pvData = pv;
667	parms.cbData = cb;
668
669	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_DATA_WRITE, &parms, sizeof (parms));
670	}
671	else
672	{
673	vboxClipboardWriteData (pClient, pv, cb, u32Format);
674	}
675	}
676	}
677	}
678	} break;
679
680	default:
681	{
682	rc = VERR_NOT_IMPLEMENTED;
683	}
684	}
685
686	LogRelFlow(("svcCall: rc = %Rrc\n", rc));
687
688	if (!fAsynchronousProcessing)
689	{
690	g_pHelpers->pfnCallComplete (callHandle, rc);
691	}
692	}
693
694	/** If the client in the guest is waiting for a read operation to complete
695	* then complete it, otherwise return. See the protocol description in the
696	* shared clipboard module description. */
697	void vboxSvcClipboardCompleteReadData(VBOXCLIPBOARDCLIENTDATA *pClient, int rc, uint32_t cbActual)
698	{
699	VBOXHGCMCALLHANDLE callHandle = NULL;
700	VBOXHGCMSVCPARM *paParms = NULL;
701	bool fReadPending = false;
702	if (vboxSvcClipboardLock()) /* if not can we do anything useful? */
703	{
704	callHandle = pClient->asyncRead.callHandle;
705	paParms = pClient->asyncRead.paParms;
706	fReadPending = pClient->fReadPending;
707	pClient->fReadPending = false;
708	vboxSvcClipboardUnlock();
709	}
710	if (fReadPending)
711	{
712	VBoxHGCMParmUInt32Set (&paParms[2], cbActual);
713	g_pHelpers->pfnCallComplete (callHandle, rc);
714	}
715	}
716
717	/*
718	* We differentiate between a function handler for the guest and one for the host.
719	*/
720	static DECLCALLBACK(int) svcHostCall (void *,
721	uint32_t u32Function,
722	uint32_t cParms,
723	VBOXHGCMSVCPARM paParms[])
724	{
725	int rc = VINF_SUCCESS;
726
727	LogRel2(("svcHostCall: fn = %d, cParms = %d, pparms = %d\n",
728	u32Function, cParms, paParms));
729
730	switch (u32Function)
731	{
732	case VBOX_SHARED_CLIPBOARD_HOST_FN_SET_MODE:
733	{
734	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_HOST_FN_SET_MODE\n"));
735
736	if (cParms != 1)
737	{
738	rc = VERR_INVALID_PARAMETER;
739	}
740	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* mode */
741	)
742	{
743	rc = VERR_INVALID_PARAMETER;
744	}
745	else
746	{
747	uint32_t u32Mode = VBOX_SHARED_CLIPBOARD_MODE_OFF;
748
749	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Mode);
750
751	/* The setter takes care of invalid values. */
752	vboxSvcClipboardModeSet (u32Mode);
753	}
754	} break;
755
756	case VBOX_SHARED_CLIPBOARD_HOST_FN_SET_HEADLESS:
757	{
758	uint32_t u32Headless = g_fHeadless;
759
760	rc = VERR_INVALID_PARAMETER;
761	if (cParms != 1)
762	break;
763	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Headless);
764	if (RT_SUCCESS(rc))
765	LogRelFlow(("svcCall: VBOX_SHARED_CLIPBOARD_HOST_FN_SET_HEADLESS, u32Headless=%u\n",
766	(unsigned) u32Headless));
767	g_fHeadless = RT_BOOL(u32Headless);
768	} break;
769
770	default:
771	break;
772	}
773
774	LogRelFlow(("svcHostCall: rc = %Rrc\n", rc));
775	return rc;
776	}
777
778	#ifndef UNIT_TEST
779	/**
780	* SSM descriptor table for the VBOXCLIPBOARDCLIENTDATA structure.
781	*/
782	static SSMFIELD const g_aClipboardClientDataFields[] =
783	{
784	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, u32ClientID), /* for validation purposes */
785	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, fMsgQuit),
786	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, fMsgReadData),
787	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, fMsgFormats),
788	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, u32RequestedFormat),
789	SSMFIELD_ENTRY_TERM()
790	};
791	#endif
792
793	static DECLCALLBACK(int) svcSaveState(void , uint32_t u32ClientID, void pvClient, PSSMHANDLE pSSM)
794	{
795	#ifndef UNIT_TEST
796	/*
797	* When the state will be restored, pending requests will be reissued
798	* by VMMDev. The service therefore must save state as if there were no
799	* pending request.
800	* Pending requests, if any, will be completed in svcDisconnect.
801	*/
802	LogRel2 (("svcSaveState: u32ClientID = %d\n", u32ClientID));
803
804	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
805
806	/* This field used to be the length. We're using it as a version field
807	with the high bit set. */
808	SSMR3PutU32 (pSSM, UINT32_C (0x80000002));
809	int rc = SSMR3PutStructEx (pSSM, pClient, sizeof(pClient), 0 /fFlags*/, &g_aClipboardClientDataFields[0], NULL);
810	AssertRCReturn (rc, rc);
811
812	#else /* UNIT_TEST */
813	RT_NOREF3(u32ClientID, pvClient, pSSM);
814	#endif /* UNIT_TEST */
815	return VINF_SUCCESS;
816	}
817
818	/**
819	* This structure corresponds to the original layout of the
820	* VBOXCLIPBOARDCLIENTDATA structure. As the structure was saved as a whole
821	* when saving state, we need to remember it forever in order to preserve
822	* compatibility.
823	*
824	* (Starting with 3.1 this is no longer used.)
825	*
826	* @remarks Putting this outside svcLoadState to avoid visibility warning caused
827	* by -Wattributes.
828	*/
829	typedef struct CLIPSAVEDSTATEDATA
830	{
831	struct CLIPSAVEDSTATEDATA *pNext;
832	struct CLIPSAVEDSTATEDATA *pPrev;
833
834	VBOXCLIPBOARDCONTEXT *pCtx;
835
836	uint32_t u32ClientID;
837
838	bool fAsync: 1; /* Guest is waiting for a message. */
839
840	bool fMsgQuit: 1;
841	bool fMsgReadData: 1;
842	bool fMsgFormats: 1;
843
844	struct {
845	VBOXHGCMCALLHANDLE callHandle;
846	VBOXHGCMSVCPARM *paParms;
847	} async;
848
849	struct {
850	void *pv;
851	uint32_t cb;
852	uint32_t u32Format;
853	} data;
854
855	uint32_t u32AvailableFormats;
856	uint32_t u32RequestedFormat;
857
858	} CLIPSAVEDSTATEDATA;
859
860	static DECLCALLBACK(int) svcLoadState(void , uint32_t u32ClientID, void pvClient, PSSMHANDLE pSSM, uint32_t uVersion)
861	{
862	#ifndef UNIT_TEST
863	RT_NOREF(uVersion);
864	LogRel2 (("svcLoadState: u32ClientID = %d\n", u32ClientID));
865
866	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
867
868	/* Existing client can not be in async state yet. */
869	Assert (!pClient->fAsync);
870
871	/* Save the client ID for data validation. */
872	/** @todo isn't this the same as u32ClientID? Playing safe for now... */
873	uint32_t const u32ClientIDOld = pClient->u32ClientID;
874
875	/* Restore the client data. */
876	uint32_t lenOrVer;
877	int rc = SSMR3GetU32 (pSSM, &lenOrVer);
878	AssertRCReturn (rc, rc);
879	if (lenOrVer == UINT32_C (0x80000002))
880	{
881	rc = SSMR3GetStructEx (pSSM, pClient, sizeof(pClient), 0 /fFlags*/, &g_aClipboardClientDataFields[0], NULL);
882	AssertRCReturn (rc, rc);
883	}
884	else if (lenOrVer == (SSMR3HandleHostBits (pSSM) == 64 ? 72U : 48U))
885	{
886	/**
887	* SSM descriptor table for the CLIPSAVEDSTATEDATA structure.
888	*/
889	static SSMFIELD const s_aClipSavedStateDataFields30[] =
890	{
891	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, pNext),
892	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, pPrev),
893	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, pCtx),
894	SSMFIELD_ENTRY( CLIPSAVEDSTATEDATA, u32ClientID),
895	SSMFIELD_ENTRY_CUSTOM(fMsgQuit + fMsgReadData + fMsgFormats, RT_UOFFSETOF(CLIPSAVEDSTATEDATA, u32ClientID) + 4, 4),
896	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, async.callHandle),
897	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, async.paParms),
898	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, data.pv),
899	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, data.cb),
900	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, data.u32Format),
901	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, u32AvailableFormats),
902	SSMFIELD_ENTRY( CLIPSAVEDSTATEDATA, u32RequestedFormat),
903	SSMFIELD_ENTRY_TERM()
904	};
905
906	CLIPSAVEDSTATEDATA savedState;
907	RT_ZERO (savedState);
908	rc = SSMR3GetStructEx (pSSM, &savedState, sizeof(savedState), SSMSTRUCT_FLAGS_MEM_BAND_AID,
909	&s_aClipSavedStateDataFields30[0], NULL);
910	AssertRCReturn (rc, rc);
911
912	pClient->fMsgQuit = savedState.fMsgQuit;
913	pClient->fMsgReadData = savedState.fMsgReadData;
914	pClient->fMsgFormats = savedState.fMsgFormats;
915	pClient->u32RequestedFormat = savedState.u32RequestedFormat;
916	}
917	else
918	{
919	LogRel (("Client data size mismatch: got %#x\n", lenOrVer));
920	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
921	}
922
923	/* Verify the client ID. */
924	if (pClient->u32ClientID != u32ClientIDOld)
925	{
926	LogRel (("Client ID mismatch: expected %d, got %d\n", u32ClientIDOld, pClient->u32ClientID));
927	pClient->u32ClientID = u32ClientIDOld;
928	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
929	}
930
931	/* Actual host data are to be reported to guest (SYNC). */
932	vboxClipboardSync (pClient);
933
934	#else /* UNIT_TEST*/
935	RT_NOREF(u32ClientID, pvClient, pSSM, uVersion);
936	#endif /* UNIT_TEST */
937	return VINF_SUCCESS;
938	}
939
940	static DECLCALLBACK(int) extCallback (uint32_t u32Function, uint32_t u32Format, void *pvData, uint32_t cbData)
941	{
942	RT_NOREF2(pvData, cbData);
943	if (g_pClient != NULL)
944	{
945	switch (u32Function)
946	{
947	case VBOX_CLIPBOARD_EXT_FN_FORMAT_ANNOUNCE:
948	{
949	LogRelFlow(("ANNOUNCE: g_fReadingData = %d\n", g_fReadingData));
950	if (g_fReadingData)
951	{
952	g_fDelayedAnnouncement = true;
953	g_u32DelayedFormats = u32Format;
954	}
955	else
956	{
957	vboxSvcClipboardReportMsg (g_pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS, u32Format);
958	}
959	} break;
960
961	case VBOX_CLIPBOARD_EXT_FN_DATA_READ:
962	{
963	vboxSvcClipboardReportMsg (g_pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA, u32Format);
964	} break;
965
966	default:
967	return VERR_NOT_SUPPORTED;
968	}
969	}
970
971	return VINF_SUCCESS;
972	}
973
974	static DECLCALLBACK(int) svcRegisterExtension(void , PFNHGCMSVCEXT pfnExtension, void pvExtension)
975	{
976	LogRelFlowFunc(("pfnExtension = %p\n", pfnExtension));
977
978	VBOXCLIPBOARDEXTPARMS parms;
979
980	if (pfnExtension)
981	{
982	/* Install extension. */
983	g_pfnExtension = pfnExtension;
984	g_pvExtension = pvExtension;
985
986	parms.u.pfnCallback = extCallback;
987	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_SET_CALLBACK, &parms, sizeof (parms));
988	}
989	else
990	{
991	if (g_pfnExtension)
992	{
993	parms.u.pfnCallback = NULL;
994	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_SET_CALLBACK, &parms, sizeof (parms));
995	}
996
997	/* Uninstall extension. */
998	g_pfnExtension = NULL;
999	g_pvExtension = NULL;
1000	}
1001
1002	return VINF_SUCCESS;
1003	}
1004
1005	extern "C" DECLCALLBACK(DECLEXPORT(int)) VBoxHGCMSvcLoad (VBOXHGCMSVCFNTABLE *ptable)
1006	{
1007	int rc = VINF_SUCCESS;
1008
1009	LogRelFlowFunc(("ptable = %p\n", ptable));
1010
1011	if (!ptable)
1012	{
1013	rc = VERR_INVALID_PARAMETER;
1014	}
1015	else
1016	{
1017	LogRel2(("VBoxHGCMSvcLoad: ptable->cbSize = %d, ptable->u32Version = 0x%08X\n", ptable->cbSize, ptable->u32Version));
1018
1019	if ( ptable->cbSize != sizeof (VBOXHGCMSVCFNTABLE)
1020	\|\| ptable->u32Version != VBOX_HGCM_SVC_VERSION)
1021	{
1022	rc = VERR_INVALID_PARAMETER;
1023	}
1024	else
1025	{
1026	g_pHelpers = ptable->pHelpers;
1027
1028	ptable->cbClient = sizeof (VBOXCLIPBOARDCLIENTDATA);
1029
1030	ptable->pfnUnload = svcUnload;
1031	ptable->pfnConnect = svcConnect;
1032	ptable->pfnDisconnect = svcDisconnect;
1033	ptable->pfnCall = svcCall;
1034	ptable->pfnHostCall = svcHostCall;
1035	ptable->pfnSaveState = svcSaveState;
1036	ptable->pfnLoadState = svcLoadState;
1037	ptable->pfnRegisterExtension = svcRegisterExtension;
1038	ptable->pfnNotify = NULL;
1039	ptable->pvService = NULL;
1040
1041	/* Service specific initialization. */
1042	rc = svcInit ();
1043	}
1044	}
1045
1046	return rc;
1047	}

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source: vbox/trunk/src/VBox/HostServices/SharedClipboard/service.cpp@ 76474

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