hgcmsvc.h@ 102128

Last change on this file since 102128 was 98279, checked in by vboxsync, 22 months ago
Main/src-client: Some more rc -> hrc/vrc stuff found by grep. A build fix. bugref:10223
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1	/** @file
2	* Host-Guest Communication Manager (HGCM) - Service library definitions.
3	*/
4
5	/*
6	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
7	*
8	* This file is part of VirtualBox base platform packages, as
9	* available from https://www.virtualbox.org.
10	*
11	* This program is free software; you can redistribute it and/or
12	* modify it under the terms of the GNU General Public License
13	* as published by the Free Software Foundation, in version 3 of the
14	* License.
15	*
16	* This program is distributed in the hope that it will be useful, but
17	* WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19	* General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with this program; if not, see <https://www.gnu.org/licenses>.
23	*
24	* The contents of this file may alternatively be used under the terms
25	* of the Common Development and Distribution License Version 1.0
26	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
27	* in the VirtualBox distribution, in which case the provisions of the
28	* CDDL are applicable instead of those of the GPL.
29	*
30	* You may elect to license modified versions of this file under the
31	* terms and conditions of either the GPL or the CDDL or both.
32	*
33	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
34	*/
35
36	#ifndef VBOX_INCLUDED_hgcmsvc_h
37	#define VBOX_INCLUDED_hgcmsvc_h
38	#ifndef RT_WITHOUT_PRAGMA_ONCE
39	# pragma once
40	#endif
41
42	#include <iprt/assert.h>
43	#include <iprt/stdarg.h>
44	#include <iprt/string.h>
45	#include <VBox/cdefs.h>
46	#include <VBox/types.h>
47	#include <iprt/err.h>
48	#ifdef IN_RING3
49	# include <iprt/mem.h>
50	# include <VBox/err.h>
51	# include <VBox/vmm/stam.h>
52	# include <VBox/vmm/dbgf.h>
53	# include <VBox/vmm/ssm.h>
54	#endif
55	#ifdef VBOX_TEST_HGCM_PARMS
56	# include <iprt/test.h>
57	#endif
58
59	/** @todo proper comments. */
60
61	/**
62	* Service interface version.
63	*
64	* Includes layout of both VBOXHGCMSVCFNTABLE and VBOXHGCMSVCHELPERS.
65	*
66	* A service can work with these structures if major version
67	* is equal and minor version of service is <= version of the
68	* structures.
69	*
70	* For example when a new helper is added at the end of helpers
71	* structure, then the minor version will be increased. All older
72	* services still can work because they have their old helpers
73	* unchanged.
74	*
75	* Revision history.
76	* 1.1->2.1 Because the pfnConnect now also has the pvClient parameter.
77	* 2.1->2.2 Because pfnSaveState and pfnLoadState were added
78	* 2.2->3.1 Because pfnHostCall is now synchronous, returns rc, and parameters were changed
79	* 3.1->3.2 Because pfnRegisterExtension was added
80	* 3.2->3.3 Because pfnDisconnectClient helper was added
81	* 3.3->4.1 Because the pvService entry and parameter was added
82	* 4.1->4.2 Because the VBOX_HGCM_SVC_PARM_CALLBACK parameter type was added
83	* 4.2->5.1 Removed the VBOX_HGCM_SVC_PARM_CALLBACK parameter type, as
84	* this problem is already solved by service extension callbacks
85	* 5.1->6.1 Because pfnCall got a new parameter. Also new helpers. (VBox 6.0)
86	* 6.1->6.2 Because pfnCallComplete starts returning a status code (VBox 6.0).
87	* 6.2->6.3 Because pfnGetRequestor was added (VBox 6.0).
88	* 6.3->6.4 Because pfnConnect got an additional parameter (VBox 6.0).
89	* 6.4->6.5 Because pfnGetVMMDevSessionId was added pfnLoadState got the version
90	* parameter (VBox 6.0).
91	* 6.5->7.1 Because pfnNotify was added (VBox 6.0).
92	* 7.1->8.1 Because pfnCancelled & pfnIsCallCancelled were added (VBox 6.0).
93	* 8.1->9.1 Because pfnDisconnectClient was (temporarily) removed, and
94	* acMaxClients and acMaxCallsPerClient added (VBox 6.1.26).
95	* 9.1->10.1 Because pfnDisconnectClient was added back (VBox 6.1.28).
96	* 10.1->11.1 Because pVMM added to pfnSaveState & pfnLoadState (VBox 7.0).
97	*/
98	#define VBOX_HGCM_SVC_VERSION_MAJOR (0x000b)
99	#define VBOX_HGCM_SVC_VERSION_MINOR (0x0001)
100	#define VBOX_HGCM_SVC_VERSION ((VBOX_HGCM_SVC_VERSION_MAJOR << 16) + VBOX_HGCM_SVC_VERSION_MINOR)
101
102
103	/** Typed pointer to distinguish a call to service. */
104	struct VBOXHGCMCALLHANDLE_TYPEDEF;
105	typedef struct VBOXHGCMCALLHANDLE_TYPEDEF *VBOXHGCMCALLHANDLE;
106
107	/** Service helpers pointers table. */
108	typedef struct VBOXHGCMSVCHELPERS
109	{
110	/** The service has processed the Call request. */
111	DECLR3CALLBACKMEMBER(int, pfnCallComplete, (VBOXHGCMCALLHANDLE callHandle, int32_t vrc));
112
113	void *pvInstance;
114
115	/**
116	* The service disconnects the client.
117	*
118	* This can only be used during VBOXHGCMSVCFNTABLE::pfnConnect or
119	* VBOXHGCMSVCFNTABLE::pfnDisconnect and will fail if called out side that
120	* context. Using this on the new client during VBOXHGCMSVCFNTABLE::pfnConnect
121	* is not advisable, it would be better to just return a failure status for that
122	* and it will be done automatically. (It is not possible to call this method
123	* on a client passed to VBOXHGCMSVCFNTABLE::pfnDisconnect.)
124	*
125	* There will be no VBOXHGCMSVCFNTABLE::pfnDisconnect callback for a client
126	* disconnected in this manner.
127	*
128	* @returns VBox status code.
129	* @retval VERR_NOT_FOUND if the client ID was not found.
130	* @retval VERR_INVALID_CONTEXT if not called during connect or disconnect.
131	*
132	* @remarks Used by external parties, so don't remove just because we don't use
133	* it ourselves.
134	*/
135	DECLR3CALLBACKMEMBER(int, pfnDisconnectClient, (void *pvInstance, uint32_t idClient));
136
137	/**
138	* Check if the @a callHandle is for a call restored and re-submitted from saved state.
139	*
140	* @returns true if restored, false if not.
141	* @param callHandle The call we're checking up on.
142	*/
143	DECLR3CALLBACKMEMBER(bool, pfnIsCallRestored, (VBOXHGCMCALLHANDLE callHandle));
144
145	/**
146	* Check if the @a callHandle is for a cancelled call.
147	*
148	* @returns true if cancelled, false if not.
149	* @param callHandle The call we're checking up on.
150	*/
151	DECLR3CALLBACKMEMBER(bool, pfnIsCallCancelled, (VBOXHGCMCALLHANDLE callHandle));
152
153	/** Access to STAMR3RegisterV. */
154	DECLR3CALLBACKMEMBER(int, pfnStamRegisterV,(void pvInstance, void pvSample, STAMTYPE enmType, STAMVISIBILITY enmVisibility,
155	STAMUNIT enmUnit, const char pszDesc, const char pszName, va_list va)
156	RT_IPRT_FORMAT_ATTR(7, 0));
157	/** Access to STAMR3DeregisterV. */
158	DECLR3CALLBACKMEMBER(int, pfnStamDeregisterV,(void pvInstance, const char pszPatFmt, va_list va) RT_IPRT_FORMAT_ATTR(2, 0));
159
160	/** Access to DBGFR3InfoRegisterExternal. */
161	DECLR3CALLBACKMEMBER(int, pfnInfoRegister,(void pvInstance, const char pszName, const char *pszDesc,
162	PFNDBGFHANDLEREXT pfnHandler, void *pvUser));
163	/** Access to DBGFR3InfoDeregisterExternal. */
164	DECLR3CALLBACKMEMBER(int, pfnInfoDeregister,(void pvInstance, const char pszName));
165
166	/**
167	* Retrieves the VMMDevRequestHeader::fRequestor value.
168	*
169	* @returns The field value, VMMDEV_REQUESTOR_LEGACY if not supported by the
170	* guest, VMMDEV_REQUESTOR_LOWEST if invalid call.
171	* @param hCall The call we're checking up on.
172	*/
173	DECLR3CALLBACKMEMBER(uint32_t, pfnGetRequestor, (VBOXHGCMCALLHANDLE hCall));
174
175	/**
176	* Retrieves VMMDevState::idSession.
177	*
178	* @returns current VMMDev session ID value.
179	*/
180	DECLR3CALLBACKMEMBER(uint64_t, pfnGetVMMDevSessionId, (void *pvInstance));
181
182	} VBOXHGCMSVCHELPERS;
183
184	typedef VBOXHGCMSVCHELPERS *PVBOXHGCMSVCHELPERS;
185
186	#if defined(IN_RING3) \|\| defined(IN_SLICKEDIT)
187
188	/** Wrapper around STAMR3RegisterF. */
189	DECLINLINE(int) RT_IPRT_FORMAT_ATTR(7, 8)
190	HGCMSvcHlpStamRegister(PVBOXHGCMSVCHELPERS pHlp, void *pvSample, STAMTYPE enmType, STAMVISIBILITY enmVisibility,
191	STAMUNIT enmUnit, const char pszDesc, const char pszName, ...)
192	{
193	int rc;
194	va_list va;
195	va_start(va, pszName);
196	rc = pHlp->pfnStamRegisterV(pHlp->pvInstance, pvSample, enmType, enmVisibility, enmUnit, pszDesc, pszName, va);
197	va_end(va);
198	return rc;
199	}
200
201	/** Wrapper around STAMR3RegisterV. */
202	DECLINLINE(int) RT_IPRT_FORMAT_ATTR(7, 0)
203	HGCMSvcHlpStamRegisterV(PVBOXHGCMSVCHELPERS pHlp, void *pvSample, STAMTYPE enmType, STAMVISIBILITY enmVisibility,
204	STAMUNIT enmUnit, const char pszDesc, const char pszName, va_list va)
205	{
206	return pHlp->pfnStamRegisterV(pHlp->pvInstance, pvSample, enmType, enmVisibility, enmUnit, pszDesc, pszName, va);
207	}
208
209	/** Wrapper around STAMR3DeregisterF. */
210	DECLINLINE(int) RT_IPRT_FORMAT_ATTR(2, 3) HGCMSvcHlpStamDeregister(PVBOXHGCMSVCHELPERS pHlp, const char *pszPatFmt, ...)
211	{
212	int rc;
213	va_list va;
214	va_start(va, pszPatFmt);
215	rc = pHlp->pfnStamDeregisterV(pHlp->pvInstance, pszPatFmt, va);
216	va_end(va);
217	return rc;
218	}
219
220	/** Wrapper around STAMR3DeregisterV. */
221	DECLINLINE(int) RT_IPRT_FORMAT_ATTR(2, 0) HGCMSvcHlpStamDeregisterV(PVBOXHGCMSVCHELPERS pHlp, const char *pszPatFmt, va_list va)
222	{
223	return pHlp->pfnStamDeregisterV(pHlp->pvInstance, pszPatFmt, va);
224	}
225
226	/** Wrapper around DBGFR3InfoRegisterExternal. */
227	DECLINLINE(int) HGCMSvcHlpInfoRegister(PVBOXHGCMSVCHELPERS pHlp, const char pszName, const char pszDesc,
228	PFNDBGFHANDLEREXT pfnHandler, void *pvUser)
229	{
230	return pHlp->pfnInfoRegister(pHlp->pvInstance, pszName, pszDesc, pfnHandler, pvUser);
231	}
232
233	/** Wrapper around DBGFR3InfoDeregisterExternal. */
234	DECLINLINE(int) HGCMSvcHlpInfoDeregister(PVBOXHGCMSVCHELPERS pHlp, const char *pszName)
235	{
236	return pHlp->pfnInfoDeregister(pHlp->pvInstance, pszName);
237	}
238
239	#endif /* IN_RING3 */
240
241
242	#define VBOX_HGCM_SVC_PARM_INVALID (0U)
243	#define VBOX_HGCM_SVC_PARM_32BIT (1U)
244	#define VBOX_HGCM_SVC_PARM_64BIT (2U)
245	#define VBOX_HGCM_SVC_PARM_PTR (3U)
246	#define VBOX_HGCM_SVC_PARM_PAGES (4U)
247
248	/** VBOX_HGCM_SVC_PARM_PAGES specific data. */
249	typedef struct VBOXHGCMSVCPARMPAGES
250	{
251	uint32_t cb;
252	uint16_t cPages;
253	uint16_t u16Padding;
254	void **papvPages;
255	} VBOXHGCMSVCPARMPAGES;
256	typedef VBOXHGCMSVCPARMPAGES *PVBOXHGCMSVCPARMPAGES;
257
258	typedef struct VBOXHGCMSVCPARM
259	{
260	/** VBOX_HGCM_SVC_PARM_* values. */
261	uint32_t type;
262
263	union
264	{
265	uint32_t uint32;
266	uint64_t uint64;
267	struct
268	{
269	uint32_t size;
270	void *addr;
271	} pointer;
272	/** VBOX_HGCM_SVC_PARM_PAGES */
273	VBOXHGCMSVCPARMPAGES Pages;
274	} u;
275	} VBOXHGCMSVCPARM;
276
277	/** Extract an uint32_t value from an HGCM parameter structure. */
278	DECLINLINE(int) HGCMSvcGetU32(VBOXHGCMSVCPARM pParm, uint32_t pu32)
279	{
280	int rc = VINF_SUCCESS;
281	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
282	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
283	AssertPtrReturn(pu32, VERR_INVALID_POINTER);
284	if (pParm->type != VBOX_HGCM_SVC_PARM_32BIT)
285	rc = VERR_INVALID_PARAMETER;
286	if (RT_SUCCESS(rc))
287	*pu32 = pParm->u.uint32;
288	return rc;
289	}
290
291	/** Extract an uint64_t value from an HGCM parameter structure. */
292	DECLINLINE(int) HGCMSvcGetU64(VBOXHGCMSVCPARM pParm, uint64_t pu64)
293	{
294	int rc = VINF_SUCCESS;
295	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
296	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
297	AssertPtrReturn(pu64, VERR_INVALID_POINTER);
298	if (pParm->type != VBOX_HGCM_SVC_PARM_64BIT)
299	rc = VERR_INVALID_PARAMETER;
300	if (RT_SUCCESS(rc))
301	*pu64 = pParm->u.uint64;
302	return rc;
303	}
304
305	/** Extract an pointer value from an HGCM parameter structure. */
306	DECLINLINE(int) HGCMSvcGetPv(VBOXHGCMSVCPARM pParm, void ppv, uint32_t pcb)
307	{
308	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
309	AssertPtrReturn(ppv, VERR_INVALID_POINTER);
310	AssertPtrReturn(pcb, VERR_INVALID_POINTER);
311	if (pParm->type == VBOX_HGCM_SVC_PARM_PTR)
312	{
313	*ppv = pParm->u.pointer.addr;
314	*pcb = pParm->u.pointer.size;
315	return VINF_SUCCESS;
316	}
317
318	return VERR_INVALID_PARAMETER;
319	}
320
321	/** Extract a constant pointer value from an HGCM parameter structure. */
322	DECLINLINE(int) HGCMSvcGetPcv(VBOXHGCMSVCPARM pParm, const void ppv, uint32_t pcb)
323	{
324	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
325	AssertPtrReturn(ppv, VERR_INVALID_POINTER);
326	AssertPtrReturn(pcb, VERR_INVALID_POINTER);
327	if (pParm->type == VBOX_HGCM_SVC_PARM_PTR)
328	{
329	ppv = (const void )pParm->u.pointer.addr;
330	*pcb = pParm->u.pointer.size;
331	return VINF_SUCCESS;
332	}
333
334	return VERR_INVALID_PARAMETER;
335	}
336
337	/** Extract a valid pointer to a non-empty buffer from an HGCM parameter
338	* structure. */
339	DECLINLINE(int) HGCMSvcGetBuf(VBOXHGCMSVCPARM pParm, void ppv, uint32_t pcb)
340	{
341	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
342	AssertPtrReturn(ppv, VERR_INVALID_POINTER);
343	AssertPtrReturn(pcb, VERR_INVALID_POINTER);
344	if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR
345	&& RT_VALID_PTR(pParm->u.pointer.addr)
346	&& pParm->u.pointer.size > 0)
347	{
348	*ppv = pParm->u.pointer.addr;
349	*pcb = pParm->u.pointer.size;
350	return VINF_SUCCESS;
351	}
352
353	return VERR_INVALID_PARAMETER;
354	}
355
356	/** Extract a valid pointer to a non-empty constant buffer from an HGCM
357	* parameter structure. */
358	DECLINLINE(int) HGCMSvcGetCBuf(VBOXHGCMSVCPARM pParm, const void ppv, uint32_t pcb)
359	{
360	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
361	AssertPtrReturn(ppv, VERR_INVALID_POINTER);
362	AssertPtrReturn(pcb, VERR_INVALID_POINTER);
363	if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR
364	&& RT_VALID_PTR(pParm->u.pointer.addr)
365	&& pParm->u.pointer.size > 0)
366	{
367	ppv = (const void )pParm->u.pointer.addr;
368	*pcb = pParm->u.pointer.size;
369	return VINF_SUCCESS;
370	}
371
372	return VERR_INVALID_PARAMETER;
373	}
374
375	/** Extract a string value from an HGCM parameter structure. */
376	DECLINLINE(int) HGCMSvcGetStr(VBOXHGCMSVCPARM pParm, char ppch, uint32_t pcb)
377	{
378	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
379	AssertPtrReturn(ppch, VERR_INVALID_POINTER);
380	AssertPtrReturn(pcb, VERR_INVALID_POINTER);
381	if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR
382	&& RT_VALID_PTR(pParm->u.pointer.addr)
383	&& pParm->u.pointer.size > 0)
384	{
385	int rc = RTStrValidateEncodingEx((char *)pParm->u.pointer.addr,
386	pParm->u.pointer.size,
387	RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED);
388	if (RT_FAILURE(rc))
389	return rc;
390	ppch = (char )pParm->u.pointer.addr;
391	*pcb = pParm->u.pointer.size;
392	return VINF_SUCCESS;
393	}
394
395	return VERR_INVALID_PARAMETER;
396	}
397
398	/** Extract a constant string value from an HGCM parameter structure. */
399	DECLINLINE(int) HGCMSvcGetCStr(VBOXHGCMSVCPARM pParm, const char ppch, uint32_t pcb)
400	{
401	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
402	AssertPtrReturn(ppch, VERR_INVALID_POINTER);
403	AssertPtrReturn(pcb, VERR_INVALID_POINTER);
404	if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR
405	&& RT_VALID_PTR(pParm->u.pointer.addr)
406	&& pParm->u.pointer.size > 0)
407	{
408	int rc = RTStrValidateEncodingEx((char *)pParm->u.pointer.addr,
409	pParm->u.pointer.size,
410	RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED);
411	if (RT_FAILURE(rc))
412	return rc;
413	ppch = (char )pParm->u.pointer.addr;
414	*pcb = pParm->u.pointer.size;
415	return VINF_SUCCESS;
416	}
417
418	return VERR_INVALID_PARAMETER;
419	}
420
421	/** Extract a constant string value from an HGCM parameter structure. */
422	DECLINLINE(int) HGCMSvcGetPsz(VBOXHGCMSVCPARM pParm, const char ppch, uint32_t pcb)
423	{
424	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
425	AssertPtrReturn(ppch, VERR_INVALID_POINTER);
426	AssertPtrReturn(pcb, VERR_INVALID_POINTER);
427	if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR
428	&& RT_VALID_PTR(pParm->u.pointer.addr)
429	&& pParm->u.pointer.size > 0)
430	{
431	int rc = RTStrValidateEncodingEx((const char *)pParm->u.pointer.addr,
432	pParm->u.pointer.size,
433	RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED);
434	if (RT_FAILURE(rc))
435	return rc;
436	ppch = (const char )pParm->u.pointer.addr;
437	*pcb = pParm->u.pointer.size;
438	return VINF_SUCCESS;
439	}
440
441	return VERR_INVALID_PARAMETER;
442	}
443
444	/** Set a uint32_t value to an HGCM parameter structure */
445	DECLINLINE(void) HGCMSvcSetU32(VBOXHGCMSVCPARM *pParm, uint32_t u32)
446	{
447	AssertPtr(pParm);
448	pParm->type = VBOX_HGCM_SVC_PARM_32BIT;
449	pParm->u.uint32 = u32;
450	}
451
452	/** Set a uint64_t value to an HGCM parameter structure */
453	DECLINLINE(void) HGCMSvcSetU64(VBOXHGCMSVCPARM *pParm, uint64_t u64)
454	{
455	AssertPtr(pParm);
456	pParm->type = VBOX_HGCM_SVC_PARM_64BIT;
457	pParm->u.uint64 = u64;
458	}
459
460	/** Set a pointer value to an HGCM parameter structure */
461	DECLINLINE(void) HGCMSvcSetPv(VBOXHGCMSVCPARM pParm, void pv, uint32_t cb)
462	{
463	AssertPtr(pParm);
464	pParm->type = VBOX_HGCM_SVC_PARM_PTR;
465	pParm->u.pointer.addr = pv;
466	pParm->u.pointer.size = cb;
467	}
468
469	/** Set a pointer value to an HGCM parameter structure */
470	DECLINLINE(void) HGCMSvcSetStr(VBOXHGCMSVCPARM pParm, const char psz)
471	{
472	AssertPtr(pParm);
473	pParm->type = VBOX_HGCM_SVC_PARM_PTR;
474	pParm->u.pointer.addr = (void *)psz;
475	pParm->u.pointer.size = (uint32_t)strlen(psz) + 1;
476	}
477
478	#ifdef __cplusplus
479	# ifdef IPRT_INCLUDED_cpp_ministring_h
480	/** Set a const string value to an HGCM parameter structure */
481	DECLINLINE(void) HGCMSvcSetRTCStr(VBOXHGCMSVCPARM *pParm, const RTCString &rString)
482	{
483	AssertPtr(pParm);
484	pParm->type = VBOX_HGCM_SVC_PARM_PTR;
485	pParm->u.pointer.addr = (void *)rString.c_str();
486	pParm->u.pointer.size = (uint32_t)rString.length() + 1;
487	}
488	# endif
489	#endif
490
491	#if defined(IN_RING3) && defined(VBOX_INCLUDED_vmm_vmmr3vtable_h)
492
493	/**
494	* Puts (serializes) a VBOXHGCMSVCPARM struct into SSM.
495	*
496	* @returns VBox status code.
497	* @param pParm VBOXHGCMSVCPARM to serialize.
498	* @param pSSM SSM handle to serialize to.
499	* @param pVMM The VMM vtable.
500	*/
501	DECLINLINE(int) HGCMSvcSSMR3Put(VBOXHGCMSVCPARM *pParm, PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM)
502	{
503	int rc;
504
505	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
506	AssertPtrReturn(pSSM, VERR_INVALID_POINTER);
507
508	rc = pVMM->pfnSSMR3PutU32(pSSM, sizeof(VBOXHGCMSVCPARM));
509	AssertRCReturn(rc, rc);
510	rc = pVMM->pfnSSMR3PutU32(pSSM, pParm->type);
511	AssertRCReturn(rc, rc);
512
513	switch (pParm->type)
514	{
515	case VBOX_HGCM_SVC_PARM_32BIT:
516	rc = pVMM->pfnSSMR3PutU32(pSSM, pParm->u.uint32);
517	break;
518	case VBOX_HGCM_SVC_PARM_64BIT:
519	rc = pVMM->pfnSSMR3PutU64(pSSM, pParm->u.uint64);
520	break;
521	case VBOX_HGCM_SVC_PARM_PTR:
522	rc = pVMM->pfnSSMR3PutU32(pSSM, pParm->u.pointer.size);
523	if (RT_SUCCESS(rc))
524	rc = pVMM->pfnSSMR3PutMem(pSSM, pParm->u.pointer.addr, pParm->u.pointer.size);
525	break;
526	default:
527	AssertMsgFailed(("Paramter type %RU32 not implemented yet\n", pParm->type));
528	rc = VERR_NOT_IMPLEMENTED;
529	break;
530	}
531
532	return rc;
533	}
534
535	/**
536	* Gets (loads) a VBOXHGCMSVCPARM struct from SSM.
537	*
538	* @returns VBox status code.
539	* @param pParm VBOXHGCMSVCPARM to load into. Must be zero'ed.
540	* @param pSSM SSM handle to load from.
541	* @param pVMM The VMM vtable.
542	*/
543	DECLINLINE(int) HGCMSvcSSMR3Get(VBOXHGCMSVCPARM *pParm, PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM)
544	{
545	uint32_t cbParm;
546	int rc;
547
548	AssertPtrReturn(pParm, VERR_INVALID_POINTER);
549	AssertPtrReturn(pSSM, VERR_INVALID_POINTER);
550
551	rc = pVMM->pfnSSMR3GetU32(pSSM, &cbParm);
552	AssertRCReturn(rc, rc);
553	AssertReturn(cbParm == sizeof(VBOXHGCMSVCPARM), VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
554
555	rc = pVMM->pfnSSMR3GetU32(pSSM, &pParm->type);
556	AssertRCReturn(rc, rc);
557
558	switch (pParm->type)
559	{
560	case VBOX_HGCM_SVC_PARM_32BIT:
561	{
562	rc = pVMM->pfnSSMR3GetU32(pSSM, &pParm->u.uint32);
563	AssertRCReturn(rc, rc);
564	break;
565	}
566
567	case VBOX_HGCM_SVC_PARM_64BIT:
568	{
569	rc = pVMM->pfnSSMR3GetU64(pSSM, &pParm->u.uint64);
570	AssertRCReturn(rc, rc);
571	break;
572	}
573
574	case VBOX_HGCM_SVC_PARM_PTR:
575	{
576	AssertMsgReturn(pParm->u.pointer.size == 0,
577	("Pointer size parameter already in use (or not initialized)\n"), VERR_INVALID_PARAMETER);
578
579	rc = pVMM->pfnSSMR3GetU32(pSSM, &pParm->u.pointer.size);
580	AssertRCReturn(rc, rc);
581
582	AssertMsgReturn(pParm->u.pointer.addr == NULL,
583	("Pointer parameter already in use (or not initialized)\n"), VERR_INVALID_PARAMETER);
584
585	pParm->u.pointer.addr = RTMemAlloc(pParm->u.pointer.size);
586	AssertPtrReturn(pParm->u.pointer.addr, VERR_NO_MEMORY);
587	rc = pVMM->pfnSSMR3GetMem(pSSM, pParm->u.pointer.addr, pParm->u.pointer.size);
588
589	AssertRCReturn(rc, rc);
590	break;
591	}
592
593	default:
594	AssertMsgFailedReturn(("Paramter type %RU32 not implemented yet\n", pParm->type),
595	VERR_NOT_IMPLEMENTED);
596	break;
597	}
598
599	return VINF_SUCCESS;
600	}
601
602	#endif /* IN_RING3 */
603
604	typedef VBOXHGCMSVCPARM *PVBOXHGCMSVCPARM;
605
606
607	/** Service specific extension callback.
608	* This callback is called by the service to perform service specific operation.
609	*
610	* @param pvExtension The extension pointer.
611	* @param u32Function What the callback is supposed to do.
612	* @param pvParm The function parameters.
613	* @param cbParms The size of the function parameters.
614	*/
615	typedef DECLCALLBACKTYPE(int, FNHGCMSVCEXT,(void pvExtension, uint32_t u32Function, void pvParm, uint32_t cbParms));
616	typedef FNHGCMSVCEXT *PFNHGCMSVCEXT;
617
618	/**
619	* Notification event.
620	*/
621	typedef enum HGCMNOTIFYEVENT
622	{
623	HGCMNOTIFYEVENT_INVALID = 0,
624	HGCMNOTIFYEVENT_POWER_ON,
625	HGCMNOTIFYEVENT_RESUME,
626	HGCMNOTIFYEVENT_SUSPEND,
627	HGCMNOTIFYEVENT_RESET,
628	HGCMNOTIFYEVENT_POWER_OFF,
629	HGCMNOTIFYEVENT_END,
630	HGCMNOTIFYEVENT_32BIT_HACK = 0x7fffffff
631	} HGCMNOTIFYEVENT;
632
633	/** @name HGCM_CLIENT_CATEGORY_XXX - Client categories
634	* @{ */
635	#define HGCM_CLIENT_CATEGORY_KERNEL 0 /*< Guest kernel mode and legacy client. /
636	#define HGCM_CLIENT_CATEGORY_ROOT 1 /*< Guest root or admin client. /
637	#define HGCM_CLIENT_CATEGORY_USER 2 /*< Regular guest user client. /
638	#define HGCM_CLIENT_CATEGORY_MAX 3 /*< Max number of categories. /
639	/** @} */
640
641
642	/** The Service DLL entry points.
643	*
644	* HGCM will call the DLL "VBoxHGCMSvcLoad"
645	* function and the DLL must fill in the VBOXHGCMSVCFNTABLE
646	* with function pointers.
647	*
648	* @note The structure is used in separately compiled binaries so an explicit
649	* packing is required.
650	*/
651	typedef struct VBOXHGCMSVCFNTABLE
652	{
653	/** @name Filled by HGCM
654	* @{ */
655
656	/** Size of the structure. */
657	uint32_t cbSize;
658
659	/** Version of the structure, including the helpers. (VBOX_HGCM_SVC_VERSION) */
660	uint32_t u32Version;
661
662	PVBOXHGCMSVCHELPERS pHelpers;
663	/** @} */
664
665	/** @name Filled in by the service.
666	* @{ */
667
668	/** Size of client information the service want to have. */
669	uint32_t cbClient;
670
671	/** The maximum number of clients per category. Leave entries as zero for defaults. */
672	uint32_t acMaxClients[HGCM_CLIENT_CATEGORY_MAX];
673	/** The maximum number of concurrent calls per client for each category.
674	* Leave entries as as zero for default. */
675	uint32_t acMaxCallsPerClient[HGCM_CLIENT_CATEGORY_MAX];
676	/** The HGCM_CLIENT_CATEGORY_XXX value for legacy clients.
677	* Defaults to HGCM_CLIENT_CATEGORY_KERNEL. */
678	uint32_t idxLegacyClientCategory;
679
680	/** Uninitialize service */
681	DECLR3CALLBACKMEMBER(int, pfnUnload, (void *pvService));
682
683	/** Inform the service about a client connection. */
684	DECLR3CALLBACKMEMBER(int, pfnConnect, (void pvService, uint32_t u32ClientID, void pvClient, uint32_t fRequestor, bool fRestoring));
685
686	/** Inform the service that the client wants to disconnect. */
687	DECLR3CALLBACKMEMBER(int, pfnDisconnect, (void pvService, uint32_t u32ClientID, void pvClient));
688
689	/** Service entry point.
690	* Return code is passed to pfnCallComplete callback.
691	*/
692	DECLR3CALLBACKMEMBER(void, pfnCall, (void pvService, VBOXHGCMCALLHANDLE callHandle, uint32_t u32ClientID, void pvClient,
693	uint32_t function, uint32_t cParms, VBOXHGCMSVCPARM paParms[], uint64_t tsArrival));
694	/** Informs the service that a call was cancelled by the guest (optional).
695	*
696	* This is called for guest calls, connect requests and disconnect requests.
697	* There is unfortunately no way of obtaining the call handle for a guest call
698	* or otherwise identify the request, so that's left to the service to figure
699	* out using VBOXHGCMSVCHELPERS::pfnIsCallCancelled. Because this is an
700	* asynchronous call, the service may have completed the request already.
701	*/
702	DECLR3CALLBACKMEMBER(void, pfnCancelled, (void pvService, uint32_t idClient, void pvClient));
703
704	/** Host Service entry point meant for privileged features invisible to the guest.
705	* Return code is passed to pfnCallComplete callback.
706	*/
707	DECLR3CALLBACKMEMBER(int, pfnHostCall, (void *pvService, uint32_t function, uint32_t cParms, VBOXHGCMSVCPARM paParms[]));
708
709	/** Inform the service about a VM save operation. */
710	DECLR3CALLBACKMEMBER(int, pfnSaveState, (void pvService, uint32_t u32ClientID, void pvClient,
711	PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM));
712
713	/** Inform the service about a VM load operation. */
714	DECLR3CALLBACKMEMBER(int, pfnLoadState, (void pvService, uint32_t u32ClientID, void pvClient,
715	PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM, uint32_t uVersion));
716
717	/** Register a service extension callback. */
718	DECLR3CALLBACKMEMBER(int, pfnRegisterExtension, (void pvService, PFNHGCMSVCEXT pfnExtension, void pvExtension));
719
720	/** Notification (VM state). */
721	DECLR3CALLBACKMEMBER(void, pfnNotify, (void *pvService, HGCMNOTIFYEVENT enmEvent));
722
723	/** User/instance data pointer for the service. */
724	void *pvService;
725
726	/** @} */
727	} VBOXHGCMSVCFNTABLE;
728
729
730	/** @name HGCM saved state
731	* @note Need to be here so we can add saved to service which doesn't have it.
732	* @{ */
733	/** HGCM saved state version. */
734	#define HGCM_SAVED_STATE_VERSION 3
735	/** HGCM saved state version w/o client state indicators. */
736	#define HGCM_SAVED_STATE_VERSION_V2 2
737	/** @} */
738
739
740	/** Service initialization entry point. */
741	typedef DECLCALLBACKTYPE(int, FNVBOXHGCMSVCLOAD,(VBOXHGCMSVCFNTABLE *ptable));
742	typedef FNVBOXHGCMSVCLOAD *PFNVBOXHGCMSVCLOAD;
743	#define VBOX_HGCM_SVCLOAD_NAME "VBoxHGCMSvcLoad"
744
745	#endif /* !VBOX_INCLUDED_hgcmsvc_h */

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source: vbox/trunk/include/VBox/hgcmsvc.h@ 102128

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