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/* $Id: VBoxGuestR0LibIdc-win.cpp $ */
/** @file
* VBoxGuestLib - Ring-0 Support Library for VBoxGuest, IDC, Windows specific.
*/
/*
* Copyright (C) 2008-2023 Oracle and/or its affiliates.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/nt/nt.h>
#include "VBoxGuestR0LibInternal.h"
#include <VBox/VBoxGuest.h>
#include <iprt/errcore.h>
#include <VBox/log.h>
/**
* Internal I/O Control call worker.
*
* @returns VBox status code.
* @param pDeviceObject The device object to call.
* @param pFileObject The file object for the connection.
* @param uReq The request.
* @param pReq The request packet.
*/
static int vbglR0IdcNtCallInternal(PDEVICE_OBJECT pDeviceObject, PFILE_OBJECT pFileObject, uint32_t uReq, PVBGLREQHDR pReq)
{
int rc;
NTSTATUS rcNt;
/*
* Build the request.
*
* We want to avoid double buffering of the request, therefore we don't
* specify any request pointers or sizes when asking the kernel to build
* the IRP for us, but instead do that part our selves.
*
* See https://www.osr.com/blog/2018/02/14/beware-iobuilddeviceiocontrolrequest/
* for how fun this is when we're not at IRQL PASSIVE (HACK ALERT futher down).
* Ran into this little issue when LoadLibraryEx on a .NET DLL using the
* LOAD_LIBRARY_AS_DATAFILE and LOAD_LIBRARY_AS_IMAGE_RESOURCE flags.
*/
KEVENT Event;
KeInitializeEvent(&Event, NotificationEvent, FALSE);
IO_STATUS_BLOCK IoStatusBlock = RTNT_IO_STATUS_BLOCK_INITIALIZER;
#if 0
PIRP pIrp = IoBuildDeviceIoControlRequest(uReq, /* IoControlCode */
pDeviceObject,
pReq, /* InputBuffer */
pReq->cbIn, /* InputBufferLength */
pReq, /* OutputBuffer */
pReq->cbOut, /* OutputBufferLength */
TRUE, /* InternalDeviceIoControl (=> IRP_MJ_INTERNAL_DEVICE_CONTROL) */
&Event, /* Event */
&IoStatusBlock); /* IoStatusBlock */
#else
PIRP pIrp = IoBuildDeviceIoControlRequest(uReq, /* IoControlCode */
pDeviceObject,
NULL, /* InputBuffer */
0, /* InputBufferLength */
NULL, /* OutputBuffer */
0, /* OutputBufferLength */
TRUE, /* InternalDeviceIoControl (=> IRP_MJ_INTERNAL_DEVICE_CONTROL) */
&Event, /* Event */
&IoStatusBlock); /* IoStatusBlock */
#endif
if (pIrp)
{
#if 0
IoGetNextIrpStackLocation(pIrp)->FileObject = pFileObject;
#else
//w2k3sp1+: if (!KeAreAllApcsDisabled())
//w2k3sp1+: pIrp->Flags |= IRP_SYNCHRONOUS_API;
//w2k3sp1+: else
{
/* HACK ALERT! Causes IoCompleteRequest to update UserIosb and free the IRP w/o any APC happening. */
pIrp->Flags |= IRP_SYNCHRONOUS_API | IRP_PAGING_IO | IRP_SYNCHRONOUS_PAGING_IO;
KIRQL bIrqlSaved;
KeRaiseIrql(APC_LEVEL, &bIrqlSaved);
RemoveEntryList(&pIrp->ThreadListEntry);
InitializeListHead(&pIrp->ThreadListEntry);
KeLowerIrql(bIrqlSaved);
}
pIrp->UserBuffer = pReq;
pIrp->AssociatedIrp.SystemBuffer = pReq;
PIO_STACK_LOCATION pStack = IoGetNextIrpStackLocation(pIrp);
pStack->FileObject = pFileObject;
pStack->Parameters.DeviceIoControl.OutputBufferLength = pReq->cbOut;
pStack->Parameters.DeviceIoControl.InputBufferLength = pReq->cbIn;
#endif
/*
* Call the driver, wait for an async request to complete (should never happen).
*/
rcNt = IoCallDriver(pDeviceObject, pIrp);
if (rcNt == STATUS_PENDING)
rcNt = KeWaitForSingleObject(&Event, /* Object */
Executive, /* WaitReason */
KernelMode, /* WaitMode */
FALSE, /* Alertable */
NULL); /* TimeOut */
if (NT_SUCCESS(rcNt))
rcNt = IoStatusBlock.Status;
if (NT_SUCCESS(rcNt))
rc = pReq->rc;
else
rc = RTErrConvertFromNtStatus(rcNt);
}
else
rc = VERR_NO_MEMORY;
return rc;
}
int VBOXCALL vbglR0IdcNativeOpen(PVBGLIDCHANDLE pHandle, PVBGLIOCIDCCONNECT pReq)
{
PDEVICE_OBJECT pDeviceObject = NULL;
PFILE_OBJECT pFileObject = NULL;
UNICODE_STRING wszDeviceName;
NTSTATUS rcNt;
int rc;
/*
* Get the device object pointer.
*/
RtlInitUnicodeString(&wszDeviceName, VBOXGUEST_DEVICE_NAME_NT);
rcNt = IoGetDeviceObjectPointer(&wszDeviceName, FILE_ALL_ACCESS, &pFileObject, &pDeviceObject);
if (NT_SUCCESS(rcNt))
{
/*
* Make the connection call.
*/
rc = vbglR0IdcNtCallInternal(pDeviceObject, pFileObject, VBGL_IOCTL_IDC_CONNECT, &pReq->Hdr);
if (RT_SUCCESS(rc) && RT_SUCCESS(pReq->Hdr.rc))
{
pHandle->s.pDeviceObject = pDeviceObject;
pHandle->s.pFileObject = pFileObject;
return rc;
}
/* only the file object. */
ObDereferenceObject(pFileObject);
}
else
rc = RTErrConvertFromNtStatus(rcNt);
pHandle->s.pDeviceObject = NULL;
pHandle->s.pFileObject = NULL;
return rc;
}
int VBOXCALL vbglR0IdcNativeClose(PVBGLIDCHANDLE pHandle, PVBGLIOCIDCDISCONNECT pReq)
{
PFILE_OBJECT pFileObject = pHandle->s.pFileObject;
int rc = vbglR0IdcNtCallInternal(pHandle->s.pDeviceObject, pFileObject, VBGL_IOCTL_IDC_DISCONNECT, &pReq->Hdr);
if (RT_SUCCESS(rc) && RT_SUCCESS(pReq->Hdr.rc))
{
pHandle->s.pDeviceObject = NULL;
pHandle->s.pFileObject = NULL;
ObDereferenceObject(pFileObject);
}
return rc;
}
/**
* Makes an IDC call, returning only the I/O control status code.
*
* @returns VBox status code (the I/O control failure status).
* @param pHandle The IDC handle.
* @param uReq The request number.
* @param pReqHdr The request header.
* @param cbReq The request size.
*/
DECLR0VBGL(int) VbglR0IdcCallRaw(PVBGLIDCHANDLE pHandle, uintptr_t uReq, PVBGLREQHDR pReqHdr, uint32_t cbReq)
{
NOREF(cbReq);
return vbglR0IdcNtCallInternal(pHandle->s.pDeviceObject, pHandle->s.pFileObject, (uint32_t)uReq, pReqHdr);
}
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