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/**********************************************************************
* 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.
*
**********************************************************************/
#pragma once
#include "Alloc.h"
#include "UsbDkUtil.h"
class CUsbDkFilterDevice;
class CUsbDkChildDevice;
class CUsbDkControlDevice;
class CWdfRequest;
class CUsbDkFilterStrategy
{
public:
virtual NTSTATUS Create(CUsbDkFilterDevice *Owner);
virtual void Delete();
virtual NTSTATUS PNPPreProcess(PIRP Irp);
virtual void IoInCallerContext(WDFDEVICE Device, WDFREQUEST Request);
virtual void IoDeviceControl(WDFREQUEST Request,
size_t OutputBufferLength, size_t InputBufferLength,
ULONG IoControlCode);
virtual void WritePipe(WDFREQUEST Request, size_t Length);
virtual void ReadPipe(WDFREQUEST Request, size_t Length);
virtual NTSTATUS MakeAvailable() = 0;
typedef CWdmList<CUsbDkChildDevice, CLockedAccess, CCountingObject> TChildrenList;
virtual TChildrenList& Children()
{ return m_Children; }
static size_t GetRequestContextSize()
{ return 0; }
CUsbDkControlDevice* GetControlDevice()
{ return m_ControlDevice; }
virtual void OnClose(){}
protected:
CUsbDkFilterDevice *m_Owner = nullptr;
CUsbDkControlDevice *m_ControlDevice = nullptr;
template<typename PostProcessFuncT>
NTSTATUS PostProcessOnSuccess(PIRP Irp, PostProcessFuncT PostProcessFunc)
{
IoCopyCurrentIrpStackLocationToNext(Irp);
auto status = CIrp::ForwardAndWait(Irp, [this, Irp]()
{ return WdfDeviceWdmDispatchPreprocessedIrp(m_Owner->WdfObject(), Irp); });
if (NT_SUCCESS(status))
{
PostProcessFunc(Irp);
}
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return status;
}
private:
void ForwardRequest(WDFREQUEST Request);
TChildrenList m_Children;
};
class CUsbDkNullFilterStrategy : public CUsbDkFilterStrategy
{
public:
virtual NTSTATUS MakeAvailable() override
{ return STATUS_SUCCESS; }
};
typedef struct _USBDK_FILTER_REQUEST_CONTEXT {
} USBDK_FILTER_REQUEST_CONTEXT, *PUSBDK_FILTER_REQUEST_CONTEXT;
WDF_DECLARE_CONTEXT_TYPE_WITH_NAME(USBDK_FILTER_REQUEST_CONTEXT, UsbDkFilterRequestGetContext);
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