VBoxUsbHook.cpp revision 97b634ea021fd984782256de4ba4ff31cdb96c47
/* $Id$ */
/** @file
* Driver Dispatch Table Hooking API
*/
/*
* Copyright (C) 2011 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#include "VBoxUsbMon.h"
#define VBOXUSBHOOK_MEMTAG 'HUBV'
{
if (pHook->fIsInstalled)
{
AssertFailed();
return STATUS_UNSUCCESSFUL;
}
pHook->pfnOldHandler = (PDRIVER_DISPATCH)InterlockedExchangePointer((PVOID*)&pHook->pDrvObj->MajorFunction[pHook->iMjFunction], pHook->pfnHook);
return STATUS_SUCCESS;
}
{
if (!pHook->fIsInstalled)
{
return STATUS_SUCCESS;
}
PDRIVER_DISPATCH pfnOldVal = (PDRIVER_DISPATCH)InterlockedCompareExchangePointer((PVOID*)&pHook->pDrvObj->MajorFunction[pHook->iMjFunction], pHook->pfnOldHandler, pHook->pfnHook);
{
AssertFailed();
/* this is bad! this could happen if someone else has chained another hook,
* return the failure and don't do anything else */
return STATUS_UNSUCCESSFUL;
}
/* wait for the current handlers to exit */
return STATUS_SUCCESS;
}
{
return fIsInstalled;
}
VOID VBoxUsbHookInit(PVBOXUSBHOOK_ENTRY pHook, PDRIVER_OBJECT pDrvObj, UCHAR iMjFunction, PDRIVER_DISPATCH pfnHook)
{
}
static void vboxUsbHookRequestRegisterCompletion(PVBOXUSBHOOK_ENTRY pHook, PDEVICE_OBJECT pDevObj, PIRP pIrp, PIO_COMPLETION_ROUTINE pfnCompletion, PVBOXUSBHOOK_REQUEST pRequest)
{
}
NTSTATUS VBoxUsbHookRequestPassDownHookCompletion(PVBOXUSBHOOK_ENTRY pHook, PDEVICE_OBJECT pDevObj, PIRP pIrp, PIO_COMPLETION_ROUTINE pfnCompletion, PVBOXUSBHOOK_REQUEST pRequest)
{
}
NTSTATUS VBoxUsbHookRequestPassDownHookSkip(PVBOXUSBHOOK_ENTRY pHook, PDEVICE_OBJECT pDevObj, PIRP pIrp)
{
}
NTSTATUS VBoxUsbHookRequestMoreProcessingRequired(PVBOXUSBHOOK_ENTRY pHook, PDEVICE_OBJECT pDevObj, PIRP pIrp, PVBOXUSBHOOK_REQUEST pRequest)
{
return STATUS_MORE_PROCESSING_REQUIRED;
}
NTSTATUS VBoxUsbHookRequestComplete(PVBOXUSBHOOK_ENTRY pHook, PDEVICE_OBJECT pDevObj, PIRP pIrp, PVBOXUSBHOOK_REQUEST pRequest)
{
{
}
{
if (pRequest->bCompletionStopped)
{
}
}
/*
* else - in case driver returned STATUS_MORE_PROCESSING_REQUIRED,
* it will call IoCompleteRequest itself
*/
return Status;
}