76299389ce
This is needed in case client sends the same IRP for a few times. Signed-off-by: Dmitry Fleytman <dfleytma@redhat.com>
132 lines
3.3 KiB
C++
132 lines
3.3 KiB
C++
/**********************************************************************
|
|
* Copyright (c) 2013-2014 Red Hat, Inc.
|
|
*
|
|
* Developed by Daynix Computing LTD.
|
|
*
|
|
* Authors:
|
|
* Dmitry Fleytman <dmitry@daynix.com>
|
|
* Pavel Gurvich <pavel@daynix.com>
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
**********************************************************************/
|
|
|
|
#include "stdafx.h"
|
|
#include "Irp.h"
|
|
|
|
CIrp::~CIrp()
|
|
{
|
|
if (m_Irp != nullptr)
|
|
{
|
|
DestroyIrp();
|
|
ReleaseTarget();
|
|
}
|
|
}
|
|
|
|
void CIrp::DestroyIrp()
|
|
{
|
|
ASSERT(m_Irp != nullptr);
|
|
|
|
IoFreeIrp(m_Irp);
|
|
m_Irp = nullptr;
|
|
}
|
|
|
|
void CIrp::ReleaseTarget()
|
|
{
|
|
ASSERT(m_TargetDevice != nullptr);
|
|
|
|
ObDereferenceObject(m_TargetDevice);
|
|
m_TargetDevice = nullptr;
|
|
}
|
|
|
|
void CIrp::Destroy()
|
|
{
|
|
DestroyIrp();
|
|
ReleaseTarget();
|
|
}
|
|
|
|
NTSTATUS CIrp::Create(PDEVICE_OBJECT TargetDevice)
|
|
{
|
|
ASSERT(m_TargetDevice == nullptr);
|
|
ASSERT(m_Irp == nullptr);
|
|
|
|
m_Irp = IoAllocateIrp(TargetDevice->StackSize, FALSE);
|
|
if (m_Irp == nullptr)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
m_Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
|
|
|
|
ObReferenceObject(TargetDevice);
|
|
m_TargetDevice = TargetDevice;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
CIoControlIrp::~CIoControlIrp()
|
|
{
|
|
if (m_TargetDevice != nullptr)
|
|
{
|
|
Destroy();
|
|
}
|
|
}
|
|
|
|
void CIoControlIrp::Destroy()
|
|
{
|
|
ASSERT(m_TargetDevice != nullptr);
|
|
|
|
ObDereferenceObject(m_TargetDevice);
|
|
m_TargetDevice = nullptr;
|
|
}
|
|
|
|
NTSTATUS CIoControlIrp::Create(PDEVICE_OBJECT TargetDevice,
|
|
ULONG IoControlCode,
|
|
bool IsInternal,
|
|
PVOID InputBuffer,
|
|
ULONG InputBufferLength,
|
|
PVOID OutputBuffer,
|
|
ULONG OutputBufferLength)
|
|
{
|
|
m_Irp = IoBuildDeviceIoControlRequest(IoControlCode,
|
|
TargetDevice,
|
|
InputBuffer,
|
|
InputBufferLength,
|
|
OutputBuffer,
|
|
OutputBufferLength,
|
|
IsInternal ? TRUE : FALSE,
|
|
m_Event,
|
|
&m_IoControlStatus);
|
|
|
|
if (m_Irp == nullptr)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
ObReferenceObject(TargetDevice);
|
|
m_TargetDevice = TargetDevice;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS CIoControlIrp::SendSynchronously()
|
|
{
|
|
m_Event.Clear();
|
|
|
|
auto res = IoCallDriver(m_TargetDevice, m_Irp);
|
|
if (res == STATUS_PENDING)
|
|
{
|
|
KeWaitForSingleObject(&m_Event, Executive, KernelMode, FALSE, nullptr);
|
|
return m_IoControlStatus.Status;
|
|
}
|
|
|
|
return res;
|
|
}
|