mouse_driver

1：function.h

#ifndef FUNCTION_H
#define FUNCTION_H

#define DRIVER_FUNCTION_ADD_DEVICE
#define DRIVER_FUNCTION_UNLOAD
#define DRIVER_FUNCTION_INTERNAL_DEVICE_CONTROL
#define DRIVER_FUNCTION_PNP
#define DRIVER_FUNCTION_POWER
#define DRIVER_FUNCTION_STARTIO
#endif

2：hidemouse.h

#ifndef HIDMOUSE_H_
#defin HIDMOUSE_H_
#define IOCTL_VHIDMOU_MOVE \
CTL_CODE(FILE_DEVICE_MOUSE, 0x801, METHOD_NEITHER, FILE_ANY_ACCESS)

#define IOCTL_VHIDMOU_CLICK \
CTL_CODE(FILE_DEVICE_MOUSE, 0x802, METHOD_NEITHER, FILE_ANY_ACCESS)

struct MOUSE_MOVE_INFO
{
ULONG deltaX;
ULONG deltaY;
};

struct MOUSE_CLICK_INFO
{
ULONG LeftOrRight;
ULONG UpOrDown;
};
#endif
3:vhidmou.h

#ifndef VHIDMOU_H_
#define VHIDMOU_H_
class VirtualHidMouseDriver : public KHidMiniDriver
{
SAFE_DESTRUCTORS
virtual NTSTATUS AddDevice(PDEVICE_OBJECT PnpDeviceObject);
};
#endif
4:vmoudev.h

#ifndef MODEV_H_
#define MODEV_H_

#define MY_VENDOR_ID 0x0001
#define MY_PRODUCT_ID 0x0002
#define VERSION_NUMBER 0x0101

class VirtualHidMouse : public KHidDevice
{
SAFE_DESTRUCTORS
public:
VirtualHidMouse(PDEVICE_OBJECT Fdo);

virtual NTSTATUS DefaultHidRequestHandler(KIrp I);
virtual NTSTATUS DefaultPnp(KIrp I);
virtual NTSTATUS DefaultPower(KIrp I);

virtual NTSTATUS OnStartDevice(KIrp I);
   virtual NTSTATUS OnStopDevice(KIrp I);
   virtual NTSTATUS OnQueryRemoveDevice(KIrp I);
   virtual NTSTATUS OnQueryStopDevice(KIrp I);
   virtual NTSTATUS OnCancelRemoveDevice(KIrp I);
   virtual NTSTATUS OnCancelStopDevice(KIrp I);
   virtual NTSTATUS OnRemoveDevice(KIrp I);

virtual VOID StartIo(KIrp I);

virtual NTSTATUS ReadReport(KIrp I);

// Other
   VOID Move(CHAR deltaX, CHAR deltaY);
   VOID Click(ULONG LeftOrRight, ULONG UpOrDown);
   VOID UpdateState(void);

DEVMEMBER_CANCELIRP (VirtualHidMouse, CancelQueuedIrp)

#ifdef __COMMENT_ONLY
VOID CancelQueuedIrp(KIrp I);
#endif

NTSTATUS IsStoppable(void) { return STATUS_SUCCESS; }
NTSTATUS IsRemovable(void) { return STATUS_SUCCESS; }

// Data

CHAR m_DeltaX;
   CHAR m_DeltaY;
   UCHAR m_OldButtonState;
   UCHAR m_NewButtonState;

KSpinLock m_Lock;
KVxDInterface m_Vxd;
KPnpLowerDevice m_Pdo;
};

// Handler for VxD interface
ULONG __stdcall VxdControlMessageHandler(
   ULONG Edi,
   ULONG Esi,
   ULONG Ebp,
   ULONG Esp,
   ULONG Ebx,
   ULONG Edx,
   ULONG Ecx,
   ULONG ControlMessage,
   PVOID Context,
   ULONG* pCarryBitReturn
   );

struct MouseReport
{
   CHAR buttons;
   CHAR deltaX;
   CHAR deltaY;
};

#define LEFT_BUTTON 1
#define RIGHT_BUTTON 2

#endif
5:vhidmou.cpp

#define VDW_MAIN
#include <khid.h>
#include "vhidmou.h" // the device class
#include "vmoudev.h" // the driver class

#pragma code_seg("INIT")

DECLARE_DRIVER_CLASS(VirtualHidMouseDriver, NULL)

#pragma code_seg()

NTSTATUS VirtualHidMouseDriver::AddDevice(PDEVICE_OBJECT Fdo)
{
NTSTATUS status;

VirtualHidMouse* p = new (NonPagedPool) VirtualHidMouse(Fdo);

if (p == NULL)
status = STATUS_INSUFFICIENT_RESOURCES;

else
   {
       status = p->ConstructorStatus();
       if ( !NT_SUCCESS(status) )
           delete p;
   }

return status;
}

6:vmoudev.cpp

#include <khid.h>
#include "vmoudev.h"
#include "hidmouse.h"

KTrace T("",TRACE_MONITOR, TraceAlways, BreakNever, KUstring(L"HidMouse"));

#define SCALEX 3
#define SCALEY 3

HID_REPORT_DESCRIPTOR MouseHidReportDesc[] = {
   0x05, 0x01,   // Usage Page (Generic Desktop),
   0x09, 0x02,   // Usage (Mouse),
   0xA1, 0x01,   // Collection (Application),
   0x09, 0x01,   // Usage (Pointer),
   0xA1, 0x00,   // Collection (Physical),
   0x05, 0x09,   // Usage Page (Buttons),
   0x19, 0x01,   // Usage Minimum (01),
   0x29, 0x03,   // Usage Maximun (03),
   0x15, 0x00,   // Logical Minimum (0),
   0x25, 0x01,   // Logical Maximum (1),
   0x95, 0x03,   // Report Count (3),
   0x75, 0x01,   // Report Size (1),
   0x81, 0x02,   // Input (Data, Variable, Absolute),   ;3 button bits
   0x95, 0x01,   // Report Count (1),
   0x75, 0x05,   // Report Size (5),
   0x81, 0x01,   // Input (Constant),           ;5 bit padding
   0x05, 0x01,   // Usage Page (Generic Desktop),
   0x09, 0x30,   // Usage (X),
   0x09, 0x31,   // Usage (Y),
   0x15, 0x81,   // Logical Minimum (-127),
   0x25, 0x7F,   // Logical Maximum (127),
   0x75, 0x08,   // Report Size (8),
   0x95, 0x02,   // Report Count (2),
   0x81, 0x06,   // Input (Data, Variable, Relative),   ;2 position bytes (X & Y)
   0xC0,        // End Collection,
   0xC0       // End Collection
   };

WCHAR HardwareID[]={L"ROOT\\NUMEGA_VIRTUAL_HID_MOUSE\0"};
WCHAR DeviceID[] ={L"ROOT\\NUMEGA_VIRTUAL_HID_MOUSE\0"};

HID_DEVICE_ATTRIBUTES DeviceAttributes = {
   sizeof(HID_DEVICE_ATTRIBUTES),
   MY_VENDOR_ID,
   MY_PRODUCT_ID,
   VERSION_NUMBER
   };

// Device String
struct
{
   HID_STRING_DESCRIPTOR Sd1;
   WCHAR Str1[14];
   HID_STRING_DESCRIPTOR Sd2;
   WCHAR Str2[9];
} TheDeviceString = {
       { 30, 3}, {'V','i','r','e','o',' ','S','o','f','t','w','a','r','e'},
       { 20, 3}, {'H','i','d',' ','M','o','u','s','e'}
   };

VirtualHidMouse* DeviceInstance=NULL;

VirtualHidMouse::VirtualHidMouse(PDEVICE_OBJECT Fdo) :
   KHidDevice(
       Fdo,
       MouseHidReportDesc,
       sizeof MouseHidReportDesc,
       DeviceID,
       HardwareID,
       NULL,
       NULL,
       &DeviceAttributes,
       &TheDeviceString.Sd1,
       sizeof TheDeviceString,
       0
       )
{
   DeviceInstance = this;

m_DeltaX = m_DeltaY = 0;
m_OldButtonState = m_NewButtonState = 0;

// Set up the PDO connection

m_Pdo.Initialize(PDO(), TopOfStack());

SetLowerDevice(&m_Pdo);

// Set standard policies
SetPnpPolicy();

// Customize the policy for canceling the current IRP
m_Policies.m_QueryRemovePolicy.m_CancelCurrentIrp = TRUE;

// Set up the VxD interface
m_Vxd.Initialize("VHIDMSE", VxdControlMessageHandler, this);
}

NTSTATUS VirtualHidMouse::ReadReport(KIrp I)
{
return QueueIrp(I, LinkTo(CancelQueuedIrp)); // queue to device queue.

}

VOID VirtualHidMouse::CancelQueuedIrp(KIrp I)
{
KDeviceQueue dq(DeviceQueue());

if ( (PIRP)I == CurrentIrp() )
   {
       CurrentIrp() = NULL;
       CancelSpinLock::Release(I.CancelIrql());
       T << "Read IRP canceled " << I << "\n";
        I.Information() = 0;
       I.Status() = STATUS_CANCELLED;
       PnpNextIrp(I);
   }
   else if (dq.RemoveSpecificEntry(I))
   {
       CancelSpinLock::Release(I.CancelIrql());
       T << "Read IRP canceled " << I << "\n";
        I.Information() = 0;
       I.PnpComplete(this, STATUS_CANCELLED);
   }
   else
   {
       CancelSpinLock::Release(I.CancelIrql());
   }
}

// StartIo

VOID VirtualHidMouse::StartIo(KIrp I)
{
ASSERT (I.MajorFunction() == IRP_MJ_INTERNAL_DEVICE_CONTROL);
ASSERT (I.IoctlCode() == IOCTL_HID_READ_REPORT);

UpdateState();
}

VOID VirtualHidMouse::UpdateState(void)
{
KIrp I=CurrentIrp();

if ( !I.IsNull() )
{
m_Lock.Lock();

if ( (m_DeltaX != 0) ||
             (m_DeltaY != 0) ||
             (m_NewButtonState != m_OldButtonState)
           )
       {

if ( !I.TestAndSetCancelRoutine(
               LinkTo(CancelQueuedIrp),
               NULL,
               CurrentIrp()) )
           {

               return;
           }

MouseReport* pReport = (MouseReport*)I.UserBuffer();

pReport->buttons = m_NewButtonState;
pReport->deltaX = m_DeltaX;
pReport->deltaY = m_DeltaY;

m_DeltaX = m_DeltaY = 0;
m_OldButtonState = m_NewButtonState;

I.Information() = sizeof(MouseReport);
I.Status() = STATUS_SUCCESS;

m_Lock.Unlock();
           PnpNextIrp(I);
       }
       else
           m_Lock.Unlock();
   }
}

VOID VirtualHidMouse::Move(CHAR DeltaX, CHAR DeltaY)
{
m_Lock.Lock();

m_DeltaX += DeltaX*SCALEX;
m_DeltaY += DeltaY*SCALEY;

m_Lock.Unlock();

UpdateState();
}

VOID VirtualHidMouse::Click(ULONG LeftOrRight, ULONG DownOrUp)
{
m_Lock.Lock();

if (DownOrUp != 0)    // down
   {
       if (LeftOrRight != 0) // left
           m_NewButtonState = (m_OldButtonState | LEFT_BUTTON);
       else // right
           m_NewButtonState = (m_OldButtonState | RIGHT_BUTTON);
   }
   else   // up
   {
       if (LeftOrRight != 0) // left
           m_NewButtonState = (m_OldButtonState & ~LEFT_BUTTON);
       else // right
           m_NewButtonState = (m_OldButtonState & ~RIGHT_BUTTON);
   }

m_Lock.Unlock();

UpdateState();
}

NTSTATUS VirtualHidMouse::DefaultHidRequestHandler(KIrp I)
{
T << "Unhandled HID request\n";

I.ForceReuseOfCurrentStackLocationInCalldown();
return m_Pdo.PnpCall(this, I);
}

NTSTATUS VirtualHidMouse::DefaultPnp(KIrp I)
{
   T << "Unhandled Pnp request, minor=" << ULONG(I.MinorFunction()) << "\n";

   I.ForceReuseOfCurrentStackLocationInCalldown();
   return m_Pdo.PnpCall(this, I);
}

NTSTATUS VirtualHidMouse::DefaultPower(KIrp I)
{
T << "Unhandled Power request, minor=" << ULONG(I.MinorFunction()) << "\n";

I.IndicatePowerIrpProcessed();
I.CopyParametersDown();
return m_Pdo.PnpPowerCall(this, I);
}

NTSTATUS VirtualHidMouse::OnQueryStopDevice(KIrp I)
{
T << "Query Stop\n";
return STATUS_SUCCESS;
}

NTSTATUS VirtualHidMouse::OnQueryRemoveDevice(KIrp I)
{
T << "Query Remove\n";
return STATUS_SUCCESS;
}

NTSTATUS VirtualHidMouse::OnCancelStopDevice(KIrp I)
{
T << "Cancel Stop\n";
return STATUS_SUCCESS;
}

NTSTATUS VirtualHidMouse::OnCancelRemoveDevice(KIrp I)
{
T << "Cancel Remove\n";
return STATUS_SUCCESS;
}

NTSTATUS VirtualHidMouse::OnStartDevice(KIrp I)
{
T << "Start Device\n";

if (!m_State.m_Started)
{

}

return STATUS_SUCCESS;
}

NTSTATUS VirtualHidMouse::OnStopDevice(KIrp I)
{
T << "Stop Device\n";

if (m_State.m_Started)
{

}

return STATUS_SUCCESS;
}

NTSTATUS VirtualHidMouse::OnRemoveDevice(KIrp I)
{
return STATUS_SUCCESS;
}

ULONG __stdcall VxdControlMessageHandler(
   ULONG Edi,
   ULONG Esi,
   ULONG Ebp,
   ULONG Esp,
   ULONG Ebx,
   ULONG Edx,
   ULONG Ecx,
   ULONG ControlMessage,
   PVOID Context,
   ULONG* pCarryBitReturn
   )
{
   if (ControlMessage == W32_DEVICEIOCONTROL)
   {
       PIOCTLPARAMS p = PIOCTLPARAMS(Esi);
       MOUSE_MOVE_INFO* pMove = (MOUSE_MOVE_INFO*)p->dioc_InBuf;
       MOUSE_CLICK_INFO* pClick = (MOUSE_CLICK_INFO*)p->dioc_InBuf;

switch (p->dioc_IOCtlCode)
{
case IOCTL_VHIDMOU_MOVE:

T << "Move x=" << pMove->deltaX << " y=" << pMove->deltaY << "\n";

DeviceInstance->Move(UCHAR(pMove->deltaX), UCHAR(pMove->deltaY));
return STATUS_SUCCESS;

case IOCTL_VHIDMOU_CLICK:

T << "Click U/D=" << pClick->UpOrDown << " L/R=" << pClick->LeftOrRight << "\n";

DeviceInstance->Click(pClick->LeftOrRight, pClick->UpOrDown);
return STATUS_SUCCESS;

default:
           return STATUS_NOT_IMPLEMENTED;
       }
   }
   else
   {
       *pCarryBitReturn = 0;
       return 0;
   }
}

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