service.cpp@ 44824

Last change on this file since 44824 was 44528, checked in by vboxsync, 12 years ago
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1	/* $Id: service.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */
2	/** @file
3	* Shared Clipboard: Host service entry points.
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 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	#include <VBox/HostServices/VBoxClipboardSvc.h>
73	#include <VBox/HostServices/VBoxClipboardExt.h>
74
75	#include <iprt/alloc.h>
76	#include <iprt/string.h>
77	#include <iprt/assert.h>
78	#include <iprt/critsect.h>
79	#include <VBox/vmm/ssm.h>
80
81	#include "VBoxClipboard.h"
82
83	static void VBoxHGCMParmUInt32Set (VBOXHGCMSVCPARM *pParm, uint32_t u32)
84	{
85	pParm->type = VBOX_HGCM_SVC_PARM_32BIT;
86	pParm->u.uint32 = u32;
87	}
88
89	static int VBoxHGCMParmUInt32Get (VBOXHGCMSVCPARM pParm, uint32_t pu32)
90	{
91	if (pParm->type == VBOX_HGCM_SVC_PARM_32BIT)
92	{
93	*pu32 = pParm->u.uint32;
94	return VINF_SUCCESS;
95	}
96
97	return VERR_INVALID_PARAMETER;
98	}
99
100	#if 0
101	static void VBoxHGCMParmPtrSet (VBOXHGCMSVCPARM pParm, void pv, uint32_t cb)
102	{
103	pParm->type = VBOX_HGCM_SVC_PARM_PTR;
104	pParm->u.pointer.size = cb;
105	pParm->u.pointer.addr = pv;
106	}
107	#endif
108
109	static int VBoxHGCMParmPtrGet (VBOXHGCMSVCPARM pParm, void ppv, uint32_t pcb)
110	{
111	if (pParm->type == VBOX_HGCM_SVC_PARM_PTR)
112	{
113	*ppv = pParm->u.pointer.addr;
114	*pcb = pParm->u.pointer.size;
115	return VINF_SUCCESS;
116	}
117
118	return VERR_INVALID_PARAMETER;
119	}
120
121	static PVBOXHGCMSVCHELPERS g_pHelpers;
122
123	static RTCRITSECT critsect;
124	static uint32_t g_u32Mode;
125
126	static PFNHGCMSVCEXT g_pfnExtension;
127	static void *g_pvExtension;
128
129	static VBOXCLIPBOARDCLIENTDATA *g_pClient;
130
131	/* Serialization of data reading and format announcements from the RDP client. */
132	static bool g_fReadingData = false;
133	static bool g_fDelayedAnnouncement = false;
134	static uint32_t g_u32DelayedFormats = 0;
135
136	/** Is the clipboard running in headless mode? */
137	static bool g_fHeadless = false;
138
139	static uint32_t vboxSvcClipboardMode (void)
140	{
141	return g_u32Mode;
142	}
143
144	#ifdef UNIT_TEST
145	/** Testing interface, getter for clipboard mode */
146	uint32_t TestClipSvcGetMode(void)
147	{
148	return vboxSvcClipboardMode();
149	}
150	#endif
151
152	/** Getter for headless setting */
153	bool vboxSvcClipboardGetHeadless(void)
154	{
155	return g_fHeadless;
156	}
157
158	static void vboxSvcClipboardModeSet (uint32_t u32Mode)
159	{
160	switch (u32Mode)
161	{
162	case VBOX_SHARED_CLIPBOARD_MODE_OFF:
163	case VBOX_SHARED_CLIPBOARD_MODE_HOST_TO_GUEST:
164	case VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST:
165	case VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL:
166	g_u32Mode = u32Mode;
167	break;
168
169	default:
170	g_u32Mode = VBOX_SHARED_CLIPBOARD_MODE_OFF;
171	}
172	}
173
174	bool vboxSvcClipboardLock (void)
175	{
176	return RT_SUCCESS(RTCritSectEnter (&critsect));
177	}
178
179	void vboxSvcClipboardUnlock (void)
180	{
181	RTCritSectLeave (&critsect);
182	}
183
184	/* Set the HGCM parameters according to pending messages.
185	* Executed under the clipboard lock.
186	*/
187	static bool vboxSvcClipboardReturnMsg (VBOXCLIPBOARDCLIENTDATA *pClient, VBOXHGCMSVCPARM paParms[])
188	{
189	/* Message priority is taken into account. */
190	if (pClient->fMsgQuit)
191	{
192	LogRelFlow(("vboxSvcClipboardReturnMsg: Quit\n"));
193	VBoxHGCMParmUInt32Set (&paParms[0], VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT);
194	VBoxHGCMParmUInt32Set (&paParms[1], 0);
195	pClient->fMsgQuit = false;
196	}
197	else if (pClient->fMsgReadData)
198	{
199	LogRelFlow(("vboxSvcClipboardReturnMsg: ReadData %02X\n", pClient->u32RequestedFormat));
200	VBoxHGCMParmUInt32Set (&paParms[0], VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA);
201	VBoxHGCMParmUInt32Set (&paParms[1], pClient->u32RequestedFormat);
202	pClient->fMsgReadData = false;
203	}
204	else if (pClient->fMsgFormats)
205	{
206	LogRelFlow(("vboxSvcClipboardReturnMsg: Formats %02X\n", pClient->u32AvailableFormats));
207	VBoxHGCMParmUInt32Set (&paParms[0], VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS);
208	VBoxHGCMParmUInt32Set (&paParms[1], pClient->u32AvailableFormats);
209	pClient->fMsgFormats = false;
210	}
211	else
212	{
213	/* No pending messages. */
214	LogRelFlow(("vboxSvcClipboardReturnMsg: no message\n"));
215	return false;
216	}
217
218	/* Message information assigned. */
219	return true;
220	}
221
222	void vboxSvcClipboardReportMsg (VBOXCLIPBOARDCLIENTDATA *pClient, uint32_t u32Msg, uint32_t u32Formats)
223	{
224	if (vboxSvcClipboardLock ())
225	{
226	switch (u32Msg)
227	{
228	case VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT:
229	{
230	LogRelFlow(("vboxSvcClipboardReportMsg: Quit\n"));
231	pClient->fMsgQuit = true;
232	} break;
233	case VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA:
234	{
235	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST
236	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
237	{
238	/* Skip the message. */
239	break;
240	}
241
242	LogRelFlow(("vboxSvcClipboardReportMsg: ReadData %02X\n", u32Formats));
243	pClient->u32RequestedFormat = u32Formats;
244	pClient->fMsgReadData = true;
245	} break;
246	case VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS:
247	{
248	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_HOST_TO_GUEST
249	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
250	{
251	/* Skip the message. */
252	break;
253	}
254
255	LogRelFlow(("vboxSvcClipboardReportMsg: Formats %02X\n", u32Formats));
256	pClient->u32AvailableFormats = u32Formats;
257	pClient->fMsgFormats = true;
258	} break;
259	default:
260	{
261	/* Invalid message. */
262	LogRelFlow(("vboxSvcClipboardReportMsg: invalid message %d\n", u32Msg));
263	} break;
264	}
265
266	if (pClient->fAsync)
267	{
268	/* The client waits for a response. */
269	bool fMessageReturned = vboxSvcClipboardReturnMsg (pClient, pClient->async.paParms);
270
271	/* Make a copy of the handle. */
272	VBOXHGCMCALLHANDLE callHandle = pClient->async.callHandle;
273
274	if (fMessageReturned)
275	{
276	/* There is a response. */
277	pClient->fAsync = false;
278	}
279
280	vboxSvcClipboardUnlock ();
281
282	if (fMessageReturned)
283	{
284	LogRelFlow(("vboxSvcClipboardReportMsg: CallComplete\n"));
285	g_pHelpers->pfnCallComplete (callHandle, VINF_SUCCESS);
286	}
287	}
288	else
289	{
290	vboxSvcClipboardUnlock ();
291	}
292	}
293	}
294
295	static int svcInit (void)
296	{
297	int rc = RTCritSectInit (&critsect);
298
299	if (RT_SUCCESS (rc))
300	{
301	vboxSvcClipboardModeSet (VBOX_SHARED_CLIPBOARD_MODE_OFF);
302
303	rc = vboxClipboardInit ();
304
305	/* Clean up on failure, because 'svnUnload' will not be called
306	* if the 'svcInit' returns an error.
307	*/
308	if (RT_FAILURE (rc))
309	{
310	RTCritSectDelete (&critsect);
311	}
312	}
313
314	return rc;
315	}
316
317	static DECLCALLBACK(int) svcUnload (void *)
318	{
319	vboxClipboardDestroy ();
320	RTCritSectDelete (&critsect);
321	return VINF_SUCCESS;
322	}
323
324	/**
325	* Disconnect the host side of the shared clipboard and send a "host disconnected" message
326	* to the guest side.
327	*/
328	static DECLCALLBACK(int) svcDisconnect (void , uint32_t u32ClientID, void pvClient)
329	{
330	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
331
332	vboxSvcClipboardReportMsg (pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT, 0);
333
334	vboxClipboardDisconnect (pClient);
335
336	memset (pClient, 0, sizeof (*pClient));
337
338	g_pClient = NULL;
339
340	return VINF_SUCCESS;
341	}
342
343	static DECLCALLBACK(int) svcConnect (void , uint32_t u32ClientID, void pvClient)
344	{
345	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
346
347	int rc = VINF_SUCCESS;
348
349	/* If there is already a client connected then we want to release it first. */
350	if (g_pClient != NULL)
351	{
352	uint32_t u32OldClientID = g_pClient->u32ClientID;
353
354	svcDisconnect(NULL, u32OldClientID, g_pClient);
355	/* And free the resources in the hgcm subsystem. */
356	g_pHelpers->pfnDisconnectClient(g_pHelpers->pvInstance, u32OldClientID);
357	}
358
359	/* Register the client. */
360	memset (pClient, 0, sizeof (*pClient));
361
362	pClient->u32ClientID = u32ClientID;
363
364	rc = vboxClipboardConnect (pClient, vboxSvcClipboardGetHeadless());
365
366	if (RT_SUCCESS (rc))
367	{
368	g_pClient = pClient;
369	}
370
371	LogRel2(("vboxClipboardConnect: rc = %Rrc\n", rc));
372
373	return rc;
374	}
375
376	static DECLCALLBACK(void) svcCall (void *,
377	VBOXHGCMCALLHANDLE callHandle,
378	uint32_t u32ClientID,
379	void *pvClient,
380	uint32_t u32Function,
381	uint32_t cParms,
382	VBOXHGCMSVCPARM paParms[])
383	{
384	int rc = VINF_SUCCESS;
385
386	LogRel2(("svcCall: u32ClientID = %d, fn = %d, cParms = %d, pparms = %d\n",
387	u32ClientID, u32Function, cParms, paParms));
388
389	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
390
391	bool fAsynchronousProcessing = false;
392
393	#ifdef DEBUG
394	uint32_t i;
395
396	for (i = 0; i < cParms; i++)
397	{
398	/** @todo parameters other than 32 bit */
399	LogRel2((" pparms[%d]: type %d value %d\n", i, paParms[i].type, paParms[i].u.uint32));
400	}
401	#endif
402
403	switch (u32Function)
404	{
405	case VBOX_SHARED_CLIPBOARD_FN_GET_HOST_MSG:
406	{
407	/* The quest requests a host message. */
408	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_GET_HOST_MSG\n"));
409
410	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_GET_HOST_MSG)
411	{
412	rc = VERR_INVALID_PARAMETER;
413	}
414	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* msg */
415	\|\| paParms[1].type != VBOX_HGCM_SVC_PARM_32BIT /* formats */
416	)
417	{
418	rc = VERR_INVALID_PARAMETER;
419	}
420	else
421	{
422	/* Atomically verify the client's state. */
423	if (vboxSvcClipboardLock ())
424	{
425	bool fMessageReturned = vboxSvcClipboardReturnMsg (pClient, paParms);
426
427	if (fMessageReturned)
428	{
429	/* Just return to the caller. */
430	pClient->fAsync = false;
431	}
432	else
433	{
434	/* No event available at the time. Process asynchronously. */
435	fAsynchronousProcessing = true;
436
437	pClient->fAsync = true;
438	pClient->async.callHandle = callHandle;
439	pClient->async.paParms = paParms;
440
441	LogRel2(("svcCall: async.\n"));
442	}
443
444	vboxSvcClipboardUnlock ();
445	}
446	else
447	{
448	rc = VERR_NOT_SUPPORTED;
449	}
450	}
451	} break;
452
453	case VBOX_SHARED_CLIPBOARD_FN_FORMATS:
454	{
455	/* The guest reports that some formats are available. */
456	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_FORMATS\n"));
457
458	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_FORMATS)
459	{
460	rc = VERR_INVALID_PARAMETER;
461	}
462	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* formats */
463	)
464	{
465	rc = VERR_INVALID_PARAMETER;
466	}
467	else
468	{
469	uint32_t u32Formats;
470
471	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Formats);
472
473	if (RT_SUCCESS (rc))
474	{
475	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST
476	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
477	{
478	rc = VERR_NOT_SUPPORTED;
479	break;
480	}
481
482	if (g_pfnExtension)
483	{
484	VBOXCLIPBOARDEXTPARMS parms;
485
486	parms.u32Format = u32Formats;
487
488	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_FORMAT_ANNOUNCE, &parms, sizeof (parms));
489	}
490	else
491	{
492	vboxClipboardFormatAnnounce (pClient, u32Formats);
493	}
494	}
495	}
496	} break;
497
498	case VBOX_SHARED_CLIPBOARD_FN_READ_DATA:
499	{
500	/* The guest wants to read data in the given format. */
501	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_READ_DATA\n"));
502
503	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_READ_DATA)
504	{
505	rc = VERR_INVALID_PARAMETER;
506	}
507	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* format */
508	\|\| paParms[1].type != VBOX_HGCM_SVC_PARM_PTR /* ptr */
509	\|\| paParms[2].type != VBOX_HGCM_SVC_PARM_32BIT /* size */
510	)
511	{
512	rc = VERR_INVALID_PARAMETER;
513	}
514	else
515	{
516	uint32_t u32Format;
517	void *pv;
518	uint32_t cb;
519
520	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Format);
521
522	if (RT_SUCCESS (rc))
523	{
524	rc = VBoxHGCMParmPtrGet (&paParms[1], &pv, &cb);
525
526	if (RT_SUCCESS (rc))
527	{
528	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_HOST_TO_GUEST
529	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
530	{
531	rc = VERR_NOT_SUPPORTED;
532	break;
533	}
534
535	uint32_t cbActual = 0;
536
537	if (g_pfnExtension)
538	{
539	VBOXCLIPBOARDEXTPARMS parms;
540
541	parms.u32Format = u32Format;
542	parms.u.pvData = pv;
543	parms.cbData = cb;
544
545	g_fReadingData = true;
546	rc = g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_DATA_READ, &parms, sizeof (parms));
547	LogRelFlow(("DATA: g_fDelayedAnnouncement = %d, g_u32DelayedFormats = 0x%x\n", g_fDelayedAnnouncement, g_u32DelayedFormats));
548	if (g_fDelayedAnnouncement)
549	{
550	vboxSvcClipboardReportMsg (g_pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS, g_u32DelayedFormats);
551	g_fDelayedAnnouncement = false;
552	g_u32DelayedFormats = 0;
553	}
554	g_fReadingData = false;
555
556	if (RT_SUCCESS (rc))
557	{
558	cbActual = parms.cbData;
559	}
560	}
561	else
562	{
563	/* Release any other pending read, as we only
564	* support one pending read at one time. */
565	vboxSvcClipboardCompleteReadData(pClient, VERR_NO_DATA, 0);
566	rc = vboxClipboardReadData (pClient, u32Format, pv, cb, &cbActual);
567	}
568
569	/* Remember our read request until it is completed.
570	* See the protocol description above for more
571	* information. */
572	if (rc == VINF_HGCM_ASYNC_EXECUTE)
573	{
574	if (vboxSvcClipboardLock())
575	{
576	pClient->asyncRead.callHandle = callHandle;
577	pClient->asyncRead.paParms = paParms;
578	pClient->fReadPending = true;
579	fAsynchronousProcessing = true;
580	vboxSvcClipboardUnlock();
581	}
582	else
583	rc = VERR_NOT_SUPPORTED;
584	}
585	else if (RT_SUCCESS (rc))
586	{
587	VBoxHGCMParmUInt32Set (&paParms[2], cbActual);
588	}
589	}
590	}
591	}
592	} break;
593
594	case VBOX_SHARED_CLIPBOARD_FN_WRITE_DATA:
595	{
596	/* The guest writes the requested data. */
597	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_FN_WRITE_DATA\n"));
598
599	if (cParms != VBOX_SHARED_CLIPBOARD_CPARMS_WRITE_DATA)
600	{
601	rc = VERR_INVALID_PARAMETER;
602	}
603	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* format */
604	\|\| paParms[1].type != VBOX_HGCM_SVC_PARM_PTR /* ptr */
605	)
606	{
607	rc = VERR_INVALID_PARAMETER;
608	}
609	else
610	{
611	void *pv;
612	uint32_t cb;
613	uint32_t u32Format;
614
615	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Format);
616
617	if (RT_SUCCESS (rc))
618	{
619	rc = VBoxHGCMParmPtrGet (&paParms[1], &pv, &cb);
620
621	if (RT_SUCCESS (rc))
622	{
623	if ( vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_GUEST_TO_HOST
624	&& vboxSvcClipboardMode () != VBOX_SHARED_CLIPBOARD_MODE_BIDIRECTIONAL)
625	{
626	rc = VERR_NOT_SUPPORTED;
627	break;
628	}
629
630	if (g_pfnExtension)
631	{
632	VBOXCLIPBOARDEXTPARMS parms;
633
634	parms.u32Format = u32Format;
635	parms.u.pvData = pv;
636	parms.cbData = cb;
637
638	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_DATA_WRITE, &parms, sizeof (parms));
639	}
640	else
641	{
642	vboxClipboardWriteData (pClient, pv, cb, u32Format);
643	}
644	}
645	}
646	}
647	} break;
648
649	default:
650	{
651	rc = VERR_NOT_IMPLEMENTED;
652	}
653	}
654
655	LogRelFlow(("svcCall: rc = %Rrc\n", rc));
656
657	if (!fAsynchronousProcessing)
658	{
659	g_pHelpers->pfnCallComplete (callHandle, rc);
660	}
661	}
662
663	/** If the client in the guest is waiting for a read operation to complete
664	* then complete it, otherwise return. See the protocol description in the
665	* shared clipboard module description. */
666	void vboxSvcClipboardCompleteReadData(VBOXCLIPBOARDCLIENTDATA *pClient, int rc, uint32_t cbActual)
667	{
668	VBOXHGCMCALLHANDLE callHandle = NULL;
669	VBOXHGCMSVCPARM *paParms = NULL;
670	bool fReadPending = false;
671	if (vboxSvcClipboardLock()) /* if not can we do anything useful? */
672	{
673	callHandle = pClient->asyncRead.callHandle;
674	paParms = pClient->asyncRead.paParms;
675	fReadPending = pClient->fReadPending;
676	pClient->fReadPending = false;
677	vboxSvcClipboardUnlock();
678	}
679	if (fReadPending)
680	{
681	VBoxHGCMParmUInt32Set (&paParms[2], cbActual);
682	g_pHelpers->pfnCallComplete (callHandle, rc);
683	}
684	}
685
686	/*
687	* We differentiate between a function handler for the guest and one for the host.
688	*/
689	static DECLCALLBACK(int) svcHostCall (void *,
690	uint32_t u32Function,
691	uint32_t cParms,
692	VBOXHGCMSVCPARM paParms[])
693	{
694	int rc = VINF_SUCCESS;
695
696	LogRel2(("svcHostCall: fn = %d, cParms = %d, pparms = %d\n",
697	u32Function, cParms, paParms));
698
699	switch (u32Function)
700	{
701	case VBOX_SHARED_CLIPBOARD_HOST_FN_SET_MODE:
702	{
703	LogRel2(("svcCall: VBOX_SHARED_CLIPBOARD_HOST_FN_SET_MODE\n"));
704
705	if (cParms != 1)
706	{
707	rc = VERR_INVALID_PARAMETER;
708	}
709	else if ( paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT /* mode */
710	)
711	{
712	rc = VERR_INVALID_PARAMETER;
713	}
714	else
715	{
716	uint32_t u32Mode = VBOX_SHARED_CLIPBOARD_MODE_OFF;
717
718	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Mode);
719
720	/* The setter takes care of invalid values. */
721	vboxSvcClipboardModeSet (u32Mode);
722	}
723	} break;
724
725	case VBOX_SHARED_CLIPBOARD_HOST_FN_SET_HEADLESS:
726	{
727	uint32_t u32Headless = g_fHeadless;
728
729	rc = VERR_INVALID_PARAMETER;
730	if (cParms != 1)
731	break;
732	rc = VBoxHGCMParmUInt32Get (&paParms[0], &u32Headless);
733	if (RT_SUCCESS(rc))
734	LogRelFlow(("svcCall: VBOX_SHARED_CLIPBOARD_HOST_FN_SET_HEADLESS, u32Headless=%u\n",
735	(unsigned) u32Headless));
736	g_fHeadless = RT_BOOL(u32Headless);
737	} break;
738
739	default:
740	break;
741	}
742
743	LogRelFlow(("svcHostCall: rc = %Rrc\n", rc));
744	return rc;
745	}
746
747	/**
748	* SSM descriptor table for the VBOXCLIPBOARDCLIENTDATA structure.
749	*/
750	static SSMFIELD const g_aClipboardClientDataFields[] =
751	{
752	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, u32ClientID), /* for validation purposes */
753	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, fMsgQuit),
754	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, fMsgReadData),
755	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, fMsgFormats),
756	SSMFIELD_ENTRY(VBOXCLIPBOARDCLIENTDATA, u32RequestedFormat),
757	SSMFIELD_ENTRY_TERM()
758	};
759
760	static DECLCALLBACK(int) svcSaveState(void , uint32_t u32ClientID, void pvClient, PSSMHANDLE pSSM)
761	{
762	#ifndef UNIT_TEST
763	/* If there are any pending requests, they must be completed here. Since
764	* the service is single threaded, there could be only requests
765	* which the service itself has postponed.
766	*
767	* HGCM knows that the state is being saved and that the pfnComplete
768	* calls are just clean ups. These requests are saved by the VMMDev.
769	*
770	* When the state will be restored, these requests will be reissued
771	* by VMMDev. The service therefore must save state as if there were no
772	* pending request.
773	*/
774	LogRel2 (("svcSaveState: u32ClientID = %d\n", u32ClientID));
775
776	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
777
778	/* This field used to be the length. We're using it as a version field
779	with the high bit set. */
780	SSMR3PutU32 (pSSM, UINT32_C (0x80000002));
781	int rc = SSMR3PutStructEx (pSSM, pClient, sizeof(pClient), 0 /fFlags*/, &g_aClipboardClientDataFields[0], NULL);
782	AssertRCReturn (rc, rc);
783
784	if (pClient->fAsync)
785	{
786	g_pHelpers->pfnCallComplete (pClient->async.callHandle, VINF_SUCCESS /* error code is not important here. */);
787	pClient->fAsync = false;
788	}
789
790	vboxSvcClipboardCompleteReadData (pClient, VINF_SUCCESS, 0);
791
792	#endif /* !UNIT_TEST */
793	return VINF_SUCCESS;
794	}
795
796	/**
797	* This structure corresponds to the original layout of the
798	* VBOXCLIPBOARDCLIENTDATA structure. As the structure was saved as a whole
799	* when saving state, we need to remember it forever in order to preserve
800	* compatibility.
801	*
802	* (Starting with 3.1 this is no longer used.)
803	*
804	* @remarks Putting this outside svcLoadState to avoid visibility warning caused
805	* by -Wattributes.
806	*/
807	typedef struct CLIPSAVEDSTATEDATA
808	{
809	struct CLIPSAVEDSTATEDATA *pNext;
810	struct CLIPSAVEDSTATEDATA *pPrev;
811
812	VBOXCLIPBOARDCONTEXT *pCtx;
813
814	uint32_t u32ClientID;
815
816	bool fAsync: 1; /* Guest is waiting for a message. */
817
818	bool fMsgQuit: 1;
819	bool fMsgReadData: 1;
820	bool fMsgFormats: 1;
821
822	struct {
823	VBOXHGCMCALLHANDLE callHandle;
824	VBOXHGCMSVCPARM *paParms;
825	} async;
826
827	struct {
828	void *pv;
829	uint32_t cb;
830	uint32_t u32Format;
831	} data;
832
833	uint32_t u32AvailableFormats;
834	uint32_t u32RequestedFormat;
835
836	} CLIPSAVEDSTATEDATA;
837
838	static DECLCALLBACK(int) svcLoadState(void , uint32_t u32ClientID, void pvClient, PSSMHANDLE pSSM)
839	{
840	#ifndef UNIT_TEST
841	LogRel2 (("svcLoadState: u32ClientID = %d\n", u32ClientID));
842
843	VBOXCLIPBOARDCLIENTDATA pClient = (VBOXCLIPBOARDCLIENTDATA )pvClient;
844
845	/* Existing client can not be in async state yet. */
846	Assert (!pClient->fAsync);
847
848	/* Save the client ID for data validation. */
849	/** @todo isn't this the same as u32ClientID? Playing safe for now... */
850	uint32_t const u32ClientIDOld = pClient->u32ClientID;
851
852	/* Restore the client data. */
853	uint32_t lenOrVer;
854	int rc = SSMR3GetU32 (pSSM, &lenOrVer);
855	AssertRCReturn (rc, rc);
856	if (lenOrVer == UINT32_C (0x80000002))
857	{
858	rc = SSMR3GetStructEx (pSSM, pClient, sizeof(pClient), 0 /fFlags*/, &g_aClipboardClientDataFields[0], NULL);
859	AssertRCReturn (rc, rc);
860	}
861	else if (lenOrVer == (SSMR3HandleHostBits (pSSM) == 64 ? 72 : 48))
862	{
863	/**
864	* SSM descriptor table for the CLIPSAVEDSTATEDATA structure.
865	*/
866	static SSMFIELD const s_aClipSavedStateDataFields30[] =
867	{
868	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, pNext),
869	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, pPrev),
870	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, pCtx),
871	SSMFIELD_ENTRY( CLIPSAVEDSTATEDATA, u32ClientID),
872	SSMFIELD_ENTRY_CUSTOM(fMsgQuit+fMsgReadData+fMsgFormats, RT_OFFSETOF(CLIPSAVEDSTATEDATA, u32ClientID) + 4, 4),
873	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, async.callHandle),
874	SSMFIELD_ENTRY_IGN_HCPTR( CLIPSAVEDSTATEDATA, async.paParms),
875	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, data.pv),
876	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, data.cb),
877	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, data.u32Format),
878	SSMFIELD_ENTRY_IGNORE( CLIPSAVEDSTATEDATA, u32AvailableFormats),
879	SSMFIELD_ENTRY( CLIPSAVEDSTATEDATA, u32RequestedFormat),
880	SSMFIELD_ENTRY_TERM()
881	};
882
883	CLIPSAVEDSTATEDATA savedState;
884	RT_ZERO (savedState);
885	rc = SSMR3GetStructEx (pSSM, &savedState, sizeof(savedState), SSMSTRUCT_FLAGS_MEM_BAND_AID,
886	&s_aClipSavedStateDataFields30[0], NULL);
887	AssertRCReturn (rc, rc);
888
889	pClient->fMsgQuit = savedState.fMsgQuit;
890	pClient->fMsgReadData = savedState.fMsgReadData;
891	pClient->fMsgFormats = savedState.fMsgFormats;
892	pClient->u32RequestedFormat = savedState.u32RequestedFormat;
893	}
894	else
895	{
896	LogRel (("Client data size mismatch: got %#x\n", lenOrVer));
897	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
898	}
899
900	/* Verify the client ID. */
901	if (pClient->u32ClientID != u32ClientIDOld)
902	{
903	LogRel (("Client ID mismatch: expected %d, got %d\n", u32ClientIDOld, pClient->u32ClientID));
904	pClient->u32ClientID = u32ClientIDOld;
905	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
906	}
907
908	/* Actual host data are to be reported to guest (SYNC). */
909	vboxClipboardSync (pClient);
910
911	#endif /* !UNIT_TEST */
912	return VINF_SUCCESS;
913	}
914
915	static DECLCALLBACK(int) extCallback (uint32_t u32Function, uint32_t u32Format, void *pvData, uint32_t cbData)
916	{
917	if (g_pClient != NULL)
918	{
919	switch (u32Function)
920	{
921	case VBOX_CLIPBOARD_EXT_FN_FORMAT_ANNOUNCE:
922	{
923	LogRelFlow(("ANNOUNCE: g_fReadingData = %d\n", g_fReadingData));
924	if (g_fReadingData)
925	{
926	g_fDelayedAnnouncement = true;
927	g_u32DelayedFormats = u32Format;
928	}
929	else
930	{
931	vboxSvcClipboardReportMsg (g_pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS, u32Format);
932	}
933	} break;
934
935	case VBOX_CLIPBOARD_EXT_FN_DATA_READ:
936	{
937	vboxSvcClipboardReportMsg (g_pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA, u32Format);
938	} break;
939
940	default:
941	return VERR_NOT_SUPPORTED;
942	}
943	}
944
945	return VINF_SUCCESS;
946	}
947
948	static DECLCALLBACK(int) svcRegisterExtension(void , PFNHGCMSVCEXT pfnExtension, void pvExtension)
949	{
950	LogRelFlowFunc(("pfnExtension = %p\n", pfnExtension));
951
952	VBOXCLIPBOARDEXTPARMS parms;
953
954	if (pfnExtension)
955	{
956	/* Install extension. */
957	g_pfnExtension = pfnExtension;
958	g_pvExtension = pvExtension;
959
960	parms.u.pfnCallback = extCallback;
961	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_SET_CALLBACK, &parms, sizeof (parms));
962	}
963	else
964	{
965	if (g_pfnExtension)
966	{
967	parms.u.pfnCallback = NULL;
968	g_pfnExtension (g_pvExtension, VBOX_CLIPBOARD_EXT_FN_SET_CALLBACK, &parms, sizeof (parms));
969	}
970
971	/* Uninstall extension. */
972	g_pfnExtension = NULL;
973	g_pvExtension = NULL;
974	}
975
976	return VINF_SUCCESS;
977	}
978
979	extern "C" DECLCALLBACK(DECLEXPORT(int)) VBoxHGCMSvcLoad (VBOXHGCMSVCFNTABLE *ptable)
980	{
981	int rc = VINF_SUCCESS;
982
983	LogRelFlowFunc(("ptable = %p\n", ptable));
984
985	if (!ptable)
986	{
987	rc = VERR_INVALID_PARAMETER;
988	}
989	else
990	{
991	LogRel2(("VBoxHGCMSvcLoad: ptable->cbSize = %d, ptable->u32Version = 0x%08X\n", ptable->cbSize, ptable->u32Version));
992
993	if ( ptable->cbSize != sizeof (VBOXHGCMSVCFNTABLE)
994	\|\| ptable->u32Version != VBOX_HGCM_SVC_VERSION)
995	{
996	rc = VERR_INVALID_PARAMETER;
997	}
998	else
999	{
1000	g_pHelpers = ptable->pHelpers;
1001
1002	ptable->cbClient = sizeof (VBOXCLIPBOARDCLIENTDATA);
1003
1004	ptable->pfnUnload = svcUnload;
1005	ptable->pfnConnect = svcConnect;
1006	ptable->pfnDisconnect = svcDisconnect;
1007	ptable->pfnCall = svcCall;
1008	ptable->pfnHostCall = svcHostCall;
1009	ptable->pfnSaveState = svcSaveState;
1010	ptable->pfnLoadState = svcLoadState;
1011	ptable->pfnRegisterExtension = svcRegisterExtension;
1012	ptable->pvService = NULL;
1013
1014	/* Service specific initialization. */
1015	rc = svcInit ();
1016	}
1017	}
1018
1019	return rc;
1020	}

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source: vbox/trunk/src/VBox/HostServices/SharedClipboard/service.cpp@ 44824

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