How to write an application to control a driver which is pnp and in kmdf? - windows

Question

so I will detail so that we can easily understand
I have to make a driver for a pcie card, I already have the driver that I wrote in kmdf, now I am using this driver, unfortunately I find myself stuck, I have to write an application (which for example would call the METHOD_IN_DIRECT function that I defined in a switch case in my IoDeviceControl)
I therefore tried to start from an example on github and modified it so that it works ... but obviously as this example is for a NONpnp driver it is not usable for my driver which is pnp.
So I looked for examples of applications that worked with a pnp driver to see the model / shape, but I can't find a tutorial / sites / example on the realization of this famous application, one of the only sites that spoke about it was saying:
"Set an interface guide so the application can find the device and talk to it."
now my question is:
"how to write an aplication to control a PNP driver"
the main in "test.c":
int __cdecl
main(
_In_ ULONG argc,
_In_reads_(argc) PCHAR argv[]
)
{
HANDLE hDevice;
DWORD errNum = 0;
CHAR driverLocation[MAX_PATH];
BOOL ok;
LONG error;
// ULONG bytesReturned;
printf("main start. \n");
//
//open the device
printf("createFile. \n");
hDevice = CreateFileA(DRIVER_NAME,
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hDevice == INVALID_HANDLE_VALUE){...}
printf("press enter \n");
int c = getchar();
printf("reception d'un charactere . \n");
if (c) {
printf("ioctl go \n");
DoIoctls(hDevice);
printf("ioctl end \n");
//
// Close the handle to the device before unloading the driver.
//
CloseHandle(hDevice);
//
// Unload the driver. Ignore any errors.
//
ManageDriver(DRIVER_NAME, driverLocation, DRIVER_FUNC_REMOVE);
}
c = getchar();
return;
}
here is the main of "test.c" which is at the base for nonpnp but that I modified that said I do not know how to embed the use of the GUID in my application (I imagine that it is because of that that it does not work).
the function DoIoctl :
VOID
DoIoctls(
HANDLE hDevice
)
{
char OutputBuffer[100];
char InputBuffer[200];
BOOL bRc;
ULONG bytesReturned;
//
// Printing Input & Output buffer pointers and size
//
printf("\nInputBuffer Pointer = %p, BufLength = %Id\n", InputBuffer,sizeof(InputBuffer));
printf("OutputBuffer Pointer = %p BufLength = %Id\n", OutputBuffer,sizeof(OutputBuffer));
//
// Performing METHOD_IN_DIRECT
//
printf("\nCalling DeviceIoControl METHOD_IN_DIRECT\n");
if (FAILED(StringCchCopy(InputBuffer, sizeof(InputBuffer),"this String is from User Application; using METHOD_IN_DIRECT")))
{
return;
}
if (FAILED(StringCchCopy(OutputBuffer, sizeof(OutputBuffer),"This String is from User Application in OutBuffer; using METHOD_IN_DIRECT")))
{
return;
}
bRc = DeviceIoControl(hDevice,
(DWORD)Spw_PCIe_IOCTL_IN_BUFFERED,
InputBuffer,
(DWORD)strlen(InputBuffer) + 1,
OutputBuffer,
sizeof(OutputBuffer),
&bytesReturned,
NULL
);
if (!bRc)
{
printf("Error in DeviceIoControl : %d \n", GetLastError());
return;
}
printf(" Number of bytes transfered from OutBuffer: %d\n",bytesReturned);
//
// Performing METHOD_OUT_DIRECT
//
printf("\nCalling DeviceIoControl METHOD_OUT_DIRECT\n");
if (FAILED(StringCchCopy(InputBuffer, sizeof(InputBuffer), "this String is from User Application; using METHOD_OUT_DIRECT"))) {
return;
}
memset(OutputBuffer, 0, sizeof(OutputBuffer));
bRc = DeviceIoControl(hDevice,
(DWORD)Spw_PCIe_IOCTL_OUT_BUFFERED,
InputBuffer,
(DWORD)strlen(InputBuffer) + 1,
OutputBuffer,
sizeof(OutputBuffer),
&bytesReturned,
NULL
);
if (!bRc)
{
printf("Error in DeviceIoControl : : %d", GetLastError());
return;
}
printf(" OutBuffer (%d): %s\n", bytesReturned, OutputBuffer);
return;
}
function ManageDriver :
BOOLEAN
ManageDriver( // <- ManageDriver
IN LPCTSTR DriverName,
IN LPCTSTR ServiceName,
IN USHORT Function
)
{
SC_HANDLE schSCManager;
BOOLEAN rCode = TRUE;
schSCManager = OpenSCManager(NULL, // local machine
NULL, // local database
SC_MANAGER_ALL_ACCESS // access required
)
// Do the requested function.
switch (Function) {;
case DRIVER_FUNC_REMOVE: // REMOVE
printf("remove case. \n");
// Stop the driver.
StopDriver(schSCManager,DriverName);
// Remove the driver service.
RemoveDriver(schSCManager,DriverName);
// Ignore all errors.
rCode = TRUE;
break;
default:
printf("Unknown ManageDriver() function. \n");
rCode = FALSE;
break;
}
// Close handle to service control manager.
if (schSCManager) {
CloseServiceHandle(schSCManager);
}
return rCode;
} // ManageDriver fin
function remove :
BOOLEAN
RemoveDriver( // <- RemoveDriver
_In_ SC_HANDLE SchSCManager,
_In_ LPCTSTR DriverName
)
{
SC_HANDLE schService;
BOOLEAN rCode;
// Open the handle to the existing service.
schService = OpenService(SchSCManager,DriverName,SERVICE_ALL_ACCESS);
// Mark the service for deletion from the service control manager database.
DeleteService(schService)
if (schService) {
CloseServiceHandle(schService);
}
return rCode;
} // RemoveDriver fin
function StartDriver :
BOOLEAN
StartDriver(
_In_ SC_HANDLE SchSCManager,
_In_ LPCTSTR DriverName
)
{
SC_HANDLE schService;
DWORD err;
// Open the handle to the existing service.
schService = OpenService(SchSCManager, DriverName,SERVICE_ALL_ACCESS );
// Start the execution of the service (i.e. start the driver).
StartService(schService, // service identifier
0, // number of arguments
NULL // pointer to arguments
)
// Close the service object.
if (schService) {
CloseServiceHandle(schService);
}
return TRUE;
} // StartDriver fin
function StopDriver :
BOOLEAN
StopDriver(
_In_ SC_HANDLE SchSCManager,
_In_ LPCTSTR DriverName
)
{
BOOLEAN rCode = TRUE;
SC_HANDLE schService;
SERVICE_STATUS serviceStatus;
//
// Open the handle to the existing service.
//
schService = OpenService(SchSCManager,
DriverName,
SERVICE_ALL_ACCESS
);
//
// Request that the service stop.
//
ControlService(schService,
SERVICE_CONTROL_STOP,
&serviceStatus
)
//
// Close the service object.
//
if (schService) {
CloseServiceHandle(schService);
}
return rCode;
} // StopDriver fin
I deleted everything that is debugger otherwise there is sure that it would not be clear
if you had any indication maybe I'm wrong about the nature of applications maybe the solution is very dumb but if you know anything about writing application for pnp driver I'm a taker
to shorten it :
i would need an application skeleton, but not just any, i need one that works for a pnp driver.
(it doesn't matter which driver as long as it's a pnp)
this is to be able to compare with my application and see what is missing from my aplication to support plug and play
cordially thank you all

Answer 1

You need to obtain the device path using the SetupDi functions as shown in this answer.