CODEWITHSUNDEEP
c++windowsdriverdeviceioctl
bmotmans
bmotmans

Reputation: 15820

Send IOCTL to Windows device driver - CreateFile fails

I want to send an IOCTL command to a PC/SC reader connected to my computer (win7 64 bit). In order to send an IOCTL command I need a HANDLE to the device, which I'm unable to create.

The device is listed as "OMNIKEY 1021" in the device manager, the physical device object name is "\Device\USBPDO-15". Using the "WinObj" tool, I can detect 2 symlinks: USB#VID_076B&PID_1021#5&291f6990&0&1#{50dd5230-ba8a-11d1-bf5d-0000f805f530} USB#VID_076B&PID_1021#5&291f6990&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}

My problem: I cannot create a valid handle to this device with the CreateFile function:

I found several possible formats on MSDN/Google to use as the lpFileName param of the CreateFile function, but none of them seem to work:

\\?\Device\USBPDO-15
\\.\Device\USBPDO-15
\\GLOBAL??\Device\USBPDO-15
\GLOBAL??\Device\USBPDO-15
\\.\USBPDO-15
\\?\USB#VID_076B&PID_1021#5&291f6990&0&1#{50dd5230-ba8a-11d1-bf5d-0000f805f530}
\\.\USB#VID_076B&PID_1021#5&291f6990&0&1#{50dd5230-ba8a-11d1-bf5d-0000f805f530}
\\GLOBAL??\USB#VID_076B&PID_1021#5&291f6990&0&1#{50dd5230-ba8a-11d1-bf5d-0000f805f530}
\GLOBAL??\USB#VID_076B&PID_1021#5&291f6990&0&1#{50dd5230-ba8a-11d1-bf5d-0000f805f530}
\\?\USB#VID_076B&PID_1021#5&291f6990&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
\\.\USB#VID_076B&PID_1021#5&291f6990&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
\\GLOBAL??\USB#VID_076B&PID_1021#5&291f6990&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
\GLOBAL??\USB#VID_076B&PID_1021#5&291f6990&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}

Code sample:

#include <iostream>
#include <Windows.h>

int main (int argc, char* argv[])
{
    HANDLE handle = CreateFile (
        L"\\\\.\\Device\\USBPDO-15",
        0,
        FILE_SHARE_READ, //FILE_SHARE_WRITE,
        NULL,
        OPEN_EXISTING,
        0, //FILE_FLAG_OVERLAPPED,
        NULL
    );

    if (handle == INVALID_HANDLE_VALUE)
        std::cout << "INVALID HANDLE" << std::endl;
    else
        std::cout << "HANDLE: " << std::hex << handle << std::endl;
}

Notes:

edit:

Solution:

Upvotes: 9

Views: 17248

Answers (2)

user2986042
user2986042

Reputation: 1270

Just try with CreateFile(L"\\\\.\\{GUID}",etc...

Upvotes: 1

Violet Giraffe
Violet Giraffe

Reputation: 33605

Try it my way. I'm using Setup API to enumerate all USB active devices in the system and get paths. That way you can find out whether it's the path or other arguments that CreateFile doesn't like.

I'll add some comments a bit later, if anyone's interested.

HDEVINFO hDevInfo = SetupDiGetClassDevs( &_DEVINTERFACE_USB_DEVICE, 0, 0, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
    if(hDevInfo == INVALID_HANDLE_VALUE)
    {
        return ERR_FAIL;
    }

    std::vector<SP_INTERFACE_DEVICE_DATA> interfaces;

    for (DWORD i = 0; true; ++i)
    {
        SP_DEVINFO_DATA devInfo;
        devInfo.cbSize = sizeof(SP_DEVINFO_DATA);
        BOOL succ = SetupDiEnumDeviceInfo(hDevInfo, i, &devInfo);
        if (GetLastError() == ERROR_NO_MORE_ITEMS)
            break;
        if (!succ) continue;

        SP_INTERFACE_DEVICE_DATA ifInfo;
        ifInfo.cbSize = sizeof(SP_INTERFACE_DEVICE_DATA);
        if (TRUE != SetupDiEnumDeviceInterfaces(hDevInfo, &devInfo,  &(_DEVINTERFACE_USB_DEVICE), 0, &ifInfo))
        {
            if (GetLastError() != ERROR_NO_MORE_ITEMS)
                break;
        }
        interfaces.push_back(ifInfo);
    }

    std::vector<SP_INTERFACE_DEVICE_DETAIL_DATA*> devicePaths;
    for (size_t i = 0; i < interfaces.size(); ++i)
    {
        DWORD requiredSize = 0;
        SetupDiGetDeviceInterfaceDetail(hDevInfo, &(interfaces.at(i)), NULL, NULL, &requiredSize, NULL);
        SP_INTERFACE_DEVICE_DETAIL_DATA* data = (SP_INTERFACE_DEVICE_DETAIL_DATA*) malloc(requiredSize);
        assert (data);
        data->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);

        if (!SetupDiGetDeviceInterfaceDetail(hDevInfo, &(interfaces.at(i)), data, requiredSize, NULL, NULL))
        {
            continue;
        }
        devicePaths.push_back(data);
    }

Upvotes: 9

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