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| -rw-r--r-- | include/VBox/hgcmsvc.h | 745 |
1 files changed, 745 insertions, 0 deletions
diff --git a/include/VBox/hgcmsvc.h b/include/VBox/hgcmsvc.h new file mode 100644 index 00000000..eba36f40 --- /dev/null +++ b/include/VBox/hgcmsvc.h @@ -0,0 +1,745 @@ +/** @file + * Host-Guest Communication Manager (HGCM) - Service library definitions. + */ + +/* + * Copyright (C) 2006-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#ifndef VBOX_INCLUDED_hgcmsvc_h +#define VBOX_INCLUDED_hgcmsvc_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/assert.h> +#include <iprt/stdarg.h> +#include <iprt/string.h> +#include <VBox/cdefs.h> +#include <VBox/types.h> +#include <iprt/err.h> +#ifdef IN_RING3 +# include <iprt/mem.h> +# include <VBox/err.h> +# include <VBox/vmm/stam.h> +# include <VBox/vmm/dbgf.h> +# include <VBox/vmm/ssm.h> +#endif +#ifdef VBOX_TEST_HGCM_PARMS +# include <iprt/test.h> +#endif + +/** @todo proper comments. */ + +/** + * Service interface version. + * + * Includes layout of both VBOXHGCMSVCFNTABLE and VBOXHGCMSVCHELPERS. + * + * A service can work with these structures if major version + * is equal and minor version of service is <= version of the + * structures. + * + * For example when a new helper is added at the end of helpers + * structure, then the minor version will be increased. All older + * services still can work because they have their old helpers + * unchanged. + * + * Revision history. + * 1.1->2.1 Because the pfnConnect now also has the pvClient parameter. + * 2.1->2.2 Because pfnSaveState and pfnLoadState were added + * 2.2->3.1 Because pfnHostCall is now synchronous, returns rc, and parameters were changed + * 3.1->3.2 Because pfnRegisterExtension was added + * 3.2->3.3 Because pfnDisconnectClient helper was added + * 3.3->4.1 Because the pvService entry and parameter was added + * 4.1->4.2 Because the VBOX_HGCM_SVC_PARM_CALLBACK parameter type was added + * 4.2->5.1 Removed the VBOX_HGCM_SVC_PARM_CALLBACK parameter type, as + * this problem is already solved by service extension callbacks + * 5.1->6.1 Because pfnCall got a new parameter. Also new helpers. (VBox 6.0) + * 6.1->6.2 Because pfnCallComplete starts returning a status code (VBox 6.0). + * 6.2->6.3 Because pfnGetRequestor was added (VBox 6.0). + * 6.3->6.4 Because pfnConnect got an additional parameter (VBox 6.0). + * 6.4->6.5 Because pfnGetVMMDevSessionId was added pfnLoadState got the version + * parameter (VBox 6.0). + * 6.5->7.1 Because pfnNotify was added (VBox 6.0). + * 7.1->8.1 Because pfnCancelled & pfnIsCallCancelled were added (VBox 6.0). + * 8.1->9.1 Because pfnDisconnectClient was (temporarily) removed, and + * acMaxClients and acMaxCallsPerClient added (VBox 6.1.26). + * 9.1->10.1 Because pfnDisconnectClient was added back (VBox 6.1.28). + * 10.1->11.1 Because pVMM added to pfnSaveState & pfnLoadState (VBox 7.0). + */ +#define VBOX_HGCM_SVC_VERSION_MAJOR (0x000b) +#define VBOX_HGCM_SVC_VERSION_MINOR (0x0001) +#define VBOX_HGCM_SVC_VERSION ((VBOX_HGCM_SVC_VERSION_MAJOR << 16) + VBOX_HGCM_SVC_VERSION_MINOR) + + +/** Typed pointer to distinguish a call to service. */ +struct VBOXHGCMCALLHANDLE_TYPEDEF; +typedef struct VBOXHGCMCALLHANDLE_TYPEDEF *VBOXHGCMCALLHANDLE; + +/** Service helpers pointers table. */ +typedef struct VBOXHGCMSVCHELPERS +{ + /** The service has processed the Call request. */ + DECLR3CALLBACKMEMBER(int, pfnCallComplete, (VBOXHGCMCALLHANDLE callHandle, int32_t rc)); + + void *pvInstance; + + /** + * The service disconnects the client. + * + * This can only be used during VBOXHGCMSVCFNTABLE::pfnConnect or + * VBOXHGCMSVCFNTABLE::pfnDisconnect and will fail if called out side that + * context. Using this on the new client during VBOXHGCMSVCFNTABLE::pfnConnect + * is not advisable, it would be better to just return a failure status for that + * and it will be done automatically. (It is not possible to call this method + * on a client passed to VBOXHGCMSVCFNTABLE::pfnDisconnect.) + * + * There will be no VBOXHGCMSVCFNTABLE::pfnDisconnect callback for a client + * disconnected in this manner. + * + * @returns VBox status code. + * @retval VERR_NOT_FOUND if the client ID was not found. + * @retval VERR_INVALID_CONTEXT if not called during connect or disconnect. + * + * @remarks Used by external parties, so don't remove just because we don't use + * it ourselves. + */ + DECLR3CALLBACKMEMBER(int, pfnDisconnectClient, (void *pvInstance, uint32_t idClient)); + + /** + * Check if the @a callHandle is for a call restored and re-submitted from saved state. + * + * @returns true if restored, false if not. + * @param callHandle The call we're checking up on. + */ + DECLR3CALLBACKMEMBER(bool, pfnIsCallRestored, (VBOXHGCMCALLHANDLE callHandle)); + + /** + * Check if the @a callHandle is for a cancelled call. + * + * @returns true if cancelled, false if not. + * @param callHandle The call we're checking up on. + */ + DECLR3CALLBACKMEMBER(bool, pfnIsCallCancelled, (VBOXHGCMCALLHANDLE callHandle)); + + /** Access to STAMR3RegisterV. */ + DECLR3CALLBACKMEMBER(int, pfnStamRegisterV,(void *pvInstance, void *pvSample, STAMTYPE enmType, STAMVISIBILITY enmVisibility, + STAMUNIT enmUnit, const char *pszDesc, const char *pszName, va_list va) + RT_IPRT_FORMAT_ATTR(7, 0)); + /** Access to STAMR3DeregisterV. */ + DECLR3CALLBACKMEMBER(int, pfnStamDeregisterV,(void *pvInstance, const char *pszPatFmt, va_list va) RT_IPRT_FORMAT_ATTR(2, 0)); + + /** Access to DBGFR3InfoRegisterExternal. */ + DECLR3CALLBACKMEMBER(int, pfnInfoRegister,(void *pvInstance, const char *pszName, const char *pszDesc, + PFNDBGFHANDLEREXT pfnHandler, void *pvUser)); + /** Access to DBGFR3InfoDeregisterExternal. */ + DECLR3CALLBACKMEMBER(int, pfnInfoDeregister,(void *pvInstance, const char *pszName)); + + /** + * Retrieves the VMMDevRequestHeader::fRequestor value. + * + * @returns The field value, VMMDEV_REQUESTOR_LEGACY if not supported by the + * guest, VMMDEV_REQUESTOR_LOWEST if invalid call. + * @param hCall The call we're checking up on. + */ + DECLR3CALLBACKMEMBER(uint32_t, pfnGetRequestor, (VBOXHGCMCALLHANDLE hCall)); + + /** + * Retrieves VMMDevState::idSession. + * + * @returns current VMMDev session ID value. + */ + DECLR3CALLBACKMEMBER(uint64_t, pfnGetVMMDevSessionId, (void *pvInstance)); + +} VBOXHGCMSVCHELPERS; + +typedef VBOXHGCMSVCHELPERS *PVBOXHGCMSVCHELPERS; + +#if defined(IN_RING3) || defined(IN_SLICKEDIT) + +/** Wrapper around STAMR3RegisterF. */ +DECLINLINE(int) RT_IPRT_FORMAT_ATTR(7, 8) +HGCMSvcHlpStamRegister(PVBOXHGCMSVCHELPERS pHlp, void *pvSample, STAMTYPE enmType, STAMVISIBILITY enmVisibility, + STAMUNIT enmUnit, const char *pszDesc, const char *pszName, ...) +{ + int rc; + va_list va; + va_start(va, pszName); + rc = pHlp->pfnStamRegisterV(pHlp->pvInstance, pvSample, enmType, enmVisibility, enmUnit, pszDesc, pszName, va); + va_end(va); + return rc; +} + +/** Wrapper around STAMR3RegisterV. */ +DECLINLINE(int) RT_IPRT_FORMAT_ATTR(7, 0) +HGCMSvcHlpStamRegisterV(PVBOXHGCMSVCHELPERS pHlp, void *pvSample, STAMTYPE enmType, STAMVISIBILITY enmVisibility, + STAMUNIT enmUnit, const char *pszDesc, const char *pszName, va_list va) +{ + return pHlp->pfnStamRegisterV(pHlp->pvInstance, pvSample, enmType, enmVisibility, enmUnit, pszDesc, pszName, va); +} + +/** Wrapper around STAMR3DeregisterF. */ +DECLINLINE(int) RT_IPRT_FORMAT_ATTR(2, 3) HGCMSvcHlpStamDeregister(PVBOXHGCMSVCHELPERS pHlp, const char *pszPatFmt, ...) +{ + int rc; + va_list va; + va_start(va, pszPatFmt); + rc = pHlp->pfnStamDeregisterV(pHlp->pvInstance, pszPatFmt, va); + va_end(va); + return rc; +} + +/** Wrapper around STAMR3DeregisterV. */ +DECLINLINE(int) RT_IPRT_FORMAT_ATTR(2, 0) HGCMSvcHlpStamDeregisterV(PVBOXHGCMSVCHELPERS pHlp, const char *pszPatFmt, va_list va) +{ + return pHlp->pfnStamDeregisterV(pHlp->pvInstance, pszPatFmt, va); +} + +/** Wrapper around DBGFR3InfoRegisterExternal. */ +DECLINLINE(int) HGCMSvcHlpInfoRegister(PVBOXHGCMSVCHELPERS pHlp, const char *pszName, const char *pszDesc, + PFNDBGFHANDLEREXT pfnHandler, void *pvUser) +{ + return pHlp->pfnInfoRegister(pHlp->pvInstance, pszName, pszDesc, pfnHandler, pvUser); +} + +/** Wrapper around DBGFR3InfoDeregisterExternal. */ +DECLINLINE(int) HGCMSvcHlpInfoDeregister(PVBOXHGCMSVCHELPERS pHlp, const char *pszName) +{ + return pHlp->pfnInfoDeregister(pHlp->pvInstance, pszName); +} + +#endif /* IN_RING3 */ + + +#define VBOX_HGCM_SVC_PARM_INVALID (0U) +#define VBOX_HGCM_SVC_PARM_32BIT (1U) +#define VBOX_HGCM_SVC_PARM_64BIT (2U) +#define VBOX_HGCM_SVC_PARM_PTR (3U) +#define VBOX_HGCM_SVC_PARM_PAGES (4U) + +/** VBOX_HGCM_SVC_PARM_PAGES specific data. */ +typedef struct VBOXHGCMSVCPARMPAGES +{ + uint32_t cb; + uint16_t cPages; + uint16_t u16Padding; + void **papvPages; +} VBOXHGCMSVCPARMPAGES; +typedef VBOXHGCMSVCPARMPAGES *PVBOXHGCMSVCPARMPAGES; + +typedef struct VBOXHGCMSVCPARM +{ + /** VBOX_HGCM_SVC_PARM_* values. */ + uint32_t type; + + union + { + uint32_t uint32; + uint64_t uint64; + struct + { + uint32_t size; + void *addr; + } pointer; + /** VBOX_HGCM_SVC_PARM_PAGES */ + VBOXHGCMSVCPARMPAGES Pages; + } u; +} VBOXHGCMSVCPARM; + +/** Extract an uint32_t value from an HGCM parameter structure. */ +DECLINLINE(int) HGCMSvcGetU32(VBOXHGCMSVCPARM *pParm, uint32_t *pu32) +{ + int rc = VINF_SUCCESS; + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(pu32, VERR_INVALID_POINTER); + if (pParm->type != VBOX_HGCM_SVC_PARM_32BIT) + rc = VERR_INVALID_PARAMETER; + if (RT_SUCCESS(rc)) + *pu32 = pParm->u.uint32; + return rc; +} + +/** Extract an uint64_t value from an HGCM parameter structure. */ +DECLINLINE(int) HGCMSvcGetU64(VBOXHGCMSVCPARM *pParm, uint64_t *pu64) +{ + int rc = VINF_SUCCESS; + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(pu64, VERR_INVALID_POINTER); + if (pParm->type != VBOX_HGCM_SVC_PARM_64BIT) + rc = VERR_INVALID_PARAMETER; + if (RT_SUCCESS(rc)) + *pu64 = pParm->u.uint64; + return rc; +} + +/** Extract an pointer value from an HGCM parameter structure. */ +DECLINLINE(int) HGCMSvcGetPv(VBOXHGCMSVCPARM *pParm, void **ppv, uint32_t *pcb) +{ + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(ppv, VERR_INVALID_POINTER); + AssertPtrReturn(pcb, VERR_INVALID_POINTER); + if (pParm->type == VBOX_HGCM_SVC_PARM_PTR) + { + *ppv = pParm->u.pointer.addr; + *pcb = pParm->u.pointer.size; + return VINF_SUCCESS; + } + + return VERR_INVALID_PARAMETER; +} + +/** Extract a constant pointer value from an HGCM parameter structure. */ +DECLINLINE(int) HGCMSvcGetPcv(VBOXHGCMSVCPARM *pParm, const void **ppv, uint32_t *pcb) +{ + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(ppv, VERR_INVALID_POINTER); + AssertPtrReturn(pcb, VERR_INVALID_POINTER); + if (pParm->type == VBOX_HGCM_SVC_PARM_PTR) + { + *ppv = (const void *)pParm->u.pointer.addr; + *pcb = pParm->u.pointer.size; + return VINF_SUCCESS; + } + + return VERR_INVALID_PARAMETER; +} + +/** Extract a valid pointer to a non-empty buffer from an HGCM parameter + * structure. */ +DECLINLINE(int) HGCMSvcGetBuf(VBOXHGCMSVCPARM *pParm, void **ppv, uint32_t *pcb) +{ + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(ppv, VERR_INVALID_POINTER); + AssertPtrReturn(pcb, VERR_INVALID_POINTER); + if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR + && RT_VALID_PTR(pParm->u.pointer.addr) + && pParm->u.pointer.size > 0) + { + *ppv = pParm->u.pointer.addr; + *pcb = pParm->u.pointer.size; + return VINF_SUCCESS; + } + + return VERR_INVALID_PARAMETER; +} + +/** Extract a valid pointer to a non-empty constant buffer from an HGCM + * parameter structure. */ +DECLINLINE(int) HGCMSvcGetCBuf(VBOXHGCMSVCPARM *pParm, const void **ppv, uint32_t *pcb) +{ + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(ppv, VERR_INVALID_POINTER); + AssertPtrReturn(pcb, VERR_INVALID_POINTER); + if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR + && RT_VALID_PTR(pParm->u.pointer.addr) + && pParm->u.pointer.size > 0) + { + *ppv = (const void *)pParm->u.pointer.addr; + *pcb = pParm->u.pointer.size; + return VINF_SUCCESS; + } + + return VERR_INVALID_PARAMETER; +} + +/** Extract a string value from an HGCM parameter structure. */ +DECLINLINE(int) HGCMSvcGetStr(VBOXHGCMSVCPARM *pParm, char **ppch, uint32_t *pcb) +{ + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(ppch, VERR_INVALID_POINTER); + AssertPtrReturn(pcb, VERR_INVALID_POINTER); + if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR + && RT_VALID_PTR(pParm->u.pointer.addr) + && pParm->u.pointer.size > 0) + { + int rc = RTStrValidateEncodingEx((char *)pParm->u.pointer.addr, + pParm->u.pointer.size, + RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED); + if (RT_FAILURE(rc)) + return rc; + *ppch = (char *)pParm->u.pointer.addr; + *pcb = pParm->u.pointer.size; + return VINF_SUCCESS; + } + + return VERR_INVALID_PARAMETER; +} + +/** Extract a constant string value from an HGCM parameter structure. */ +DECLINLINE(int) HGCMSvcGetCStr(VBOXHGCMSVCPARM *pParm, const char **ppch, uint32_t *pcb) +{ + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(ppch, VERR_INVALID_POINTER); + AssertPtrReturn(pcb, VERR_INVALID_POINTER); + if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR + && RT_VALID_PTR(pParm->u.pointer.addr) + && pParm->u.pointer.size > 0) + { + int rc = RTStrValidateEncodingEx((char *)pParm->u.pointer.addr, + pParm->u.pointer.size, + RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED); + if (RT_FAILURE(rc)) + return rc; + *ppch = (char *)pParm->u.pointer.addr; + *pcb = pParm->u.pointer.size; + return VINF_SUCCESS; + } + + return VERR_INVALID_PARAMETER; +} + +/** Extract a constant string value from an HGCM parameter structure. */ +DECLINLINE(int) HGCMSvcGetPsz(VBOXHGCMSVCPARM *pParm, const char **ppch, uint32_t *pcb) +{ + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(ppch, VERR_INVALID_POINTER); + AssertPtrReturn(pcb, VERR_INVALID_POINTER); + if ( pParm->type == VBOX_HGCM_SVC_PARM_PTR + && RT_VALID_PTR(pParm->u.pointer.addr) + && pParm->u.pointer.size > 0) + { + int rc = RTStrValidateEncodingEx((const char *)pParm->u.pointer.addr, + pParm->u.pointer.size, + RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED); + if (RT_FAILURE(rc)) + return rc; + *ppch = (const char *)pParm->u.pointer.addr; + *pcb = pParm->u.pointer.size; + return VINF_SUCCESS; + } + + return VERR_INVALID_PARAMETER; +} + +/** Set a uint32_t value to an HGCM parameter structure */ +DECLINLINE(void) HGCMSvcSetU32(VBOXHGCMSVCPARM *pParm, uint32_t u32) +{ + AssertPtr(pParm); + pParm->type = VBOX_HGCM_SVC_PARM_32BIT; + pParm->u.uint32 = u32; +} + +/** Set a uint64_t value to an HGCM parameter structure */ +DECLINLINE(void) HGCMSvcSetU64(VBOXHGCMSVCPARM *pParm, uint64_t u64) +{ + AssertPtr(pParm); + pParm->type = VBOX_HGCM_SVC_PARM_64BIT; + pParm->u.uint64 = u64; +} + +/** Set a pointer value to an HGCM parameter structure */ +DECLINLINE(void) HGCMSvcSetPv(VBOXHGCMSVCPARM *pParm, void *pv, uint32_t cb) +{ + AssertPtr(pParm); + pParm->type = VBOX_HGCM_SVC_PARM_PTR; + pParm->u.pointer.addr = pv; + pParm->u.pointer.size = cb; +} + +/** Set a pointer value to an HGCM parameter structure */ +DECLINLINE(void) HGCMSvcSetStr(VBOXHGCMSVCPARM *pParm, const char *psz) +{ + AssertPtr(pParm); + pParm->type = VBOX_HGCM_SVC_PARM_PTR; + pParm->u.pointer.addr = (void *)psz; + pParm->u.pointer.size = (uint32_t)strlen(psz) + 1; +} + +#ifdef __cplusplus +# ifdef IPRT_INCLUDED_cpp_ministring_h +/** Set a const string value to an HGCM parameter structure */ +DECLINLINE(void) HGCMSvcSetRTCStr(VBOXHGCMSVCPARM *pParm, const RTCString &rString) +{ + AssertPtr(pParm); + pParm->type = VBOX_HGCM_SVC_PARM_PTR; + pParm->u.pointer.addr = (void *)rString.c_str(); + pParm->u.pointer.size = (uint32_t)rString.length() + 1; +} +# endif +#endif + +#if defined(IN_RING3) && defined(VBOX_INCLUDED_vmm_vmmr3vtable_h) + +/** + * Puts (serializes) a VBOXHGCMSVCPARM struct into SSM. + * + * @returns VBox status code. + * @param pParm VBOXHGCMSVCPARM to serialize. + * @param pSSM SSM handle to serialize to. + * @param pVMM The VMM vtable. + */ +DECLINLINE(int) HGCMSvcSSMR3Put(VBOXHGCMSVCPARM *pParm, PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM) +{ + int rc; + + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(pSSM, VERR_INVALID_POINTER); + + rc = pVMM->pfnSSMR3PutU32(pSSM, sizeof(VBOXHGCMSVCPARM)); + AssertRCReturn(rc, rc); + rc = pVMM->pfnSSMR3PutU32(pSSM, pParm->type); + AssertRCReturn(rc, rc); + + switch (pParm->type) + { + case VBOX_HGCM_SVC_PARM_32BIT: + rc = pVMM->pfnSSMR3PutU32(pSSM, pParm->u.uint32); + break; + case VBOX_HGCM_SVC_PARM_64BIT: + rc = pVMM->pfnSSMR3PutU64(pSSM, pParm->u.uint64); + break; + case VBOX_HGCM_SVC_PARM_PTR: + rc = pVMM->pfnSSMR3PutU32(pSSM, pParm->u.pointer.size); + if (RT_SUCCESS(rc)) + rc = pVMM->pfnSSMR3PutMem(pSSM, pParm->u.pointer.addr, pParm->u.pointer.size); + break; + default: + AssertMsgFailed(("Paramter type %RU32 not implemented yet\n", pParm->type)); + rc = VERR_NOT_IMPLEMENTED; + break; + } + + return rc; +} + +/** + * Gets (loads) a VBOXHGCMSVCPARM struct from SSM. + * + * @returns VBox status code. + * @param pParm VBOXHGCMSVCPARM to load into. Must be zero'ed. + * @param pSSM SSM handle to load from. + * @param pVMM The VMM vtable. + */ +DECLINLINE(int) HGCMSvcSSMR3Get(VBOXHGCMSVCPARM *pParm, PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM) +{ + uint32_t cbParm; + int rc; + + AssertPtrReturn(pParm, VERR_INVALID_POINTER); + AssertPtrReturn(pSSM, VERR_INVALID_POINTER); + + rc = pVMM->pfnSSMR3GetU32(pSSM, &cbParm); + AssertRCReturn(rc, rc); + AssertReturn(cbParm == sizeof(VBOXHGCMSVCPARM), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); + + rc = pVMM->pfnSSMR3GetU32(pSSM, &pParm->type); + AssertRCReturn(rc, rc); + + switch (pParm->type) + { + case VBOX_HGCM_SVC_PARM_32BIT: + { + rc = pVMM->pfnSSMR3GetU32(pSSM, &pParm->u.uint32); + AssertRCReturn(rc, rc); + break; + } + + case VBOX_HGCM_SVC_PARM_64BIT: + { + rc = pVMM->pfnSSMR3GetU64(pSSM, &pParm->u.uint64); + AssertRCReturn(rc, rc); + break; + } + + case VBOX_HGCM_SVC_PARM_PTR: + { + AssertMsgReturn(pParm->u.pointer.size == 0, + ("Pointer size parameter already in use (or not initialized)\n"), VERR_INVALID_PARAMETER); + + rc = pVMM->pfnSSMR3GetU32(pSSM, &pParm->u.pointer.size); + AssertRCReturn(rc, rc); + + AssertMsgReturn(pParm->u.pointer.addr == NULL, + ("Pointer parameter already in use (or not initialized)\n"), VERR_INVALID_PARAMETER); + + pParm->u.pointer.addr = RTMemAlloc(pParm->u.pointer.size); + AssertPtrReturn(pParm->u.pointer.addr, VERR_NO_MEMORY); + rc = pVMM->pfnSSMR3GetMem(pSSM, pParm->u.pointer.addr, pParm->u.pointer.size); + + AssertRCReturn(rc, rc); + break; + } + + default: + AssertMsgFailedReturn(("Paramter type %RU32 not implemented yet\n", pParm->type), + VERR_NOT_IMPLEMENTED); + break; + } + + return VINF_SUCCESS; +} + +#endif /* IN_RING3 */ + +typedef VBOXHGCMSVCPARM *PVBOXHGCMSVCPARM; + + +/** Service specific extension callback. + * This callback is called by the service to perform service specific operation. + * + * @param pvExtension The extension pointer. + * @param u32Function What the callback is supposed to do. + * @param pvParm The function parameters. + * @param cbParms The size of the function parameters. + */ +typedef DECLCALLBACKTYPE(int, FNHGCMSVCEXT,(void *pvExtension, uint32_t u32Function, void *pvParm, uint32_t cbParms)); +typedef FNHGCMSVCEXT *PFNHGCMSVCEXT; + +/** + * Notification event. + */ +typedef enum HGCMNOTIFYEVENT +{ + HGCMNOTIFYEVENT_INVALID = 0, + HGCMNOTIFYEVENT_POWER_ON, + HGCMNOTIFYEVENT_RESUME, + HGCMNOTIFYEVENT_SUSPEND, + HGCMNOTIFYEVENT_RESET, + HGCMNOTIFYEVENT_POWER_OFF, + HGCMNOTIFYEVENT_END, + HGCMNOTIFYEVENT_32BIT_HACK = 0x7fffffff +} HGCMNOTIFYEVENT; + +/** @name HGCM_CLIENT_CATEGORY_XXX - Client categories + * @{ */ +#define HGCM_CLIENT_CATEGORY_KERNEL 0 /**< Guest kernel mode and legacy client. */ +#define HGCM_CLIENT_CATEGORY_ROOT 1 /**< Guest root or admin client. */ +#define HGCM_CLIENT_CATEGORY_USER 2 /**< Regular guest user client. */ +#define HGCM_CLIENT_CATEGORY_MAX 3 /**< Max number of categories. */ +/** @} */ + + +/** The Service DLL entry points. + * + * HGCM will call the DLL "VBoxHGCMSvcLoad" + * function and the DLL must fill in the VBOXHGCMSVCFNTABLE + * with function pointers. + * + * @note The structure is used in separately compiled binaries so an explicit + * packing is required. + */ +typedef struct VBOXHGCMSVCFNTABLE +{ + /** @name Filled by HGCM + * @{ */ + + /** Size of the structure. */ + uint32_t cbSize; + + /** Version of the structure, including the helpers. (VBOX_HGCM_SVC_VERSION) */ + uint32_t u32Version; + + PVBOXHGCMSVCHELPERS pHelpers; + /** @} */ + + /** @name Filled in by the service. + * @{ */ + + /** Size of client information the service want to have. */ + uint32_t cbClient; + + /** The maximum number of clients per category. Leave entries as zero for defaults. */ + uint32_t acMaxClients[HGCM_CLIENT_CATEGORY_MAX]; + /** The maximum number of concurrent calls per client for each category. + * Leave entries as as zero for default. */ + uint32_t acMaxCallsPerClient[HGCM_CLIENT_CATEGORY_MAX]; + /** The HGCM_CLIENT_CATEGORY_XXX value for legacy clients. + * Defaults to HGCM_CLIENT_CATEGORY_KERNEL. */ + uint32_t idxLegacyClientCategory; + + /** Uninitialize service */ + DECLR3CALLBACKMEMBER(int, pfnUnload, (void *pvService)); + + /** Inform the service about a client connection. */ + DECLR3CALLBACKMEMBER(int, pfnConnect, (void *pvService, uint32_t u32ClientID, void *pvClient, uint32_t fRequestor, bool fRestoring)); + + /** Inform the service that the client wants to disconnect. */ + DECLR3CALLBACKMEMBER(int, pfnDisconnect, (void *pvService, uint32_t u32ClientID, void *pvClient)); + + /** Service entry point. + * Return code is passed to pfnCallComplete callback. + */ + DECLR3CALLBACKMEMBER(void, pfnCall, (void *pvService, VBOXHGCMCALLHANDLE callHandle, uint32_t u32ClientID, void *pvClient, + uint32_t function, uint32_t cParms, VBOXHGCMSVCPARM paParms[], uint64_t tsArrival)); + /** Informs the service that a call was cancelled by the guest (optional). + * + * This is called for guest calls, connect requests and disconnect requests. + * There is unfortunately no way of obtaining the call handle for a guest call + * or otherwise identify the request, so that's left to the service to figure + * out using VBOXHGCMSVCHELPERS::pfnIsCallCancelled. Because this is an + * asynchronous call, the service may have completed the request already. + */ + DECLR3CALLBACKMEMBER(void, pfnCancelled, (void *pvService, uint32_t idClient, void *pvClient)); + + /** Host Service entry point meant for privileged features invisible to the guest. + * Return code is passed to pfnCallComplete callback. + */ + DECLR3CALLBACKMEMBER(int, pfnHostCall, (void *pvService, uint32_t function, uint32_t cParms, VBOXHGCMSVCPARM paParms[])); + + /** Inform the service about a VM save operation. */ + DECLR3CALLBACKMEMBER(int, pfnSaveState, (void *pvService, uint32_t u32ClientID, void *pvClient, + PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM)); + + /** Inform the service about a VM load operation. */ + DECLR3CALLBACKMEMBER(int, pfnLoadState, (void *pvService, uint32_t u32ClientID, void *pvClient, + PSSMHANDLE pSSM, PCVMMR3VTABLE pVMM, uint32_t uVersion)); + + /** Register a service extension callback. */ + DECLR3CALLBACKMEMBER(int, pfnRegisterExtension, (void *pvService, PFNHGCMSVCEXT pfnExtension, void *pvExtension)); + + /** Notification (VM state). */ + DECLR3CALLBACKMEMBER(void, pfnNotify, (void *pvService, HGCMNOTIFYEVENT enmEvent)); + + /** User/instance data pointer for the service. */ + void *pvService; + + /** @} */ +} VBOXHGCMSVCFNTABLE; + + +/** @name HGCM saved state + * @note Need to be here so we can add saved to service which doesn't have it. + * @{ */ +/** HGCM saved state version. */ +#define HGCM_SAVED_STATE_VERSION 3 +/** HGCM saved state version w/o client state indicators. */ +#define HGCM_SAVED_STATE_VERSION_V2 2 +/** @} */ + + +/** Service initialization entry point. */ +typedef DECLCALLBACKTYPE(int, FNVBOXHGCMSVCLOAD,(VBOXHGCMSVCFNTABLE *ptable)); +typedef FNVBOXHGCMSVCLOAD *PFNVBOXHGCMSVCLOAD; +#define VBOX_HGCM_SVCLOAD_NAME "VBoxHGCMSvcLoad" + +#endif /* !VBOX_INCLUDED_hgcmsvc_h */ |