| 1 | /* $Id: VBoxGuestR3LibGR.cpp 70873 2018-02-05 18:13:55Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, GR.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2007-2017 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <iprt/mem.h>
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| 32 | #include <iprt/assert.h>
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| 33 | #include <iprt/string.h>
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| 34 | #include <iprt/err.h>
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| 35 | #include "VBoxGuestR3LibInternal.h"
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| 36 |
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| 37 |
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| 38 | int vbglR3GRAlloc(VMMDevRequestHeader **ppReq, size_t cb, VMMDevRequestType enmReqType)
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| 39 | {
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| 40 | VMMDevRequestHeader *pReq;
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| 41 |
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| 42 | AssertPtrReturn(ppReq, VERR_INVALID_PARAMETER);
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| 43 | AssertMsgReturn(cb >= sizeof(VMMDevRequestHeader) && cb < _1G, ("%#zx vs %#zx\n", cb, sizeof(VMMDevRequestHeader)),
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| 44 | VERR_INVALID_PARAMETER);
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| 45 |
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| 46 | pReq = (VMMDevRequestHeader *)RTMemTmpAlloc(cb);
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| 47 | if (RT_LIKELY(pReq))
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| 48 | {
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| 49 | pReq->size = (uint32_t)cb;
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| 50 | pReq->version = VMMDEV_REQUEST_HEADER_VERSION;
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| 51 | pReq->requestType = enmReqType;
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| 52 | pReq->rc = VERR_GENERAL_FAILURE;
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| 53 | pReq->reserved1 = 0;
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| 54 | pReq->fRequestor = 0;
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| 55 |
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| 56 | *ppReq = pReq;
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| 57 |
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| 58 | return VINF_SUCCESS;
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| 59 | }
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| 60 | return VERR_NO_MEMORY;
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| 61 | }
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| 62 |
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| 63 |
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| 64 | int vbglR3GRPerform(VMMDevRequestHeader *pReq)
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| 65 | {
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| 66 | PVBGLREQHDR pReqHdr = (PVBGLREQHDR)pReq;
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| 67 | uint32_t const cbReq = pReqHdr->cbIn;
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| 68 | Assert(pReqHdr->cbOut == 0 || pReqHdr->cbOut == cbReq);
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| 69 | pReqHdr->cbOut = cbReq;
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| 70 | if (pReq->size < _1K)
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| 71 | return vbglR3DoIOCtl(VBGL_IOCTL_VMMDEV_REQUEST(cbReq), pReqHdr, cbReq);
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| 72 | return vbglR3DoIOCtl(VBGL_IOCTL_VMMDEV_REQUEST_BIG, pReqHdr, cbReq);
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| 73 | }
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| 74 |
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| 75 |
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| 76 | void vbglR3GRFree(VMMDevRequestHeader *pReq)
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| 77 | {
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| 78 | RTMemTmpFree(pReq);
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| 79 | }
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| 80 |
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