public List <DfuDevice> GetDfuDevices(ushort idVendor, ushort idProduct)
{
var list = IntPtr.Zero;
var dfu_devices = new List <DfuDevice>();
var ret = NativeMethods.libusb_get_device_list(handle, ref list);
if (ret < 0)
{
throw new Exception(string.Format("Error: {0} while trying to get the device list", ret));
}
var devices = new IntPtr[ret];
Marshal.Copy(list, devices, 0, ret);
// This is awful nested looping -- we should fix it.
for (int i = 0; i < ret; i++)
{
var device_descriptor = new DeviceDescriptor();
var ptr = IntPtr.Zero;
if (NativeMethods.libusb_get_device_descriptor(devices[i], ref device_descriptor) != 0)
{
continue;
}
if (device_descriptor.idVendor != idVendor && device_descriptor.idProduct != idProduct)
{
continue;
}
for (int j = 0; j < device_descriptor.bNumConfigurations; j++)
{
ret = NativeMethods.libusb_get_config_descriptor(devices[i], (ushort)j, out ptr);
if (ret < 0)
{
throw new Exception(string.Format("Error: {0} while trying to get the config descriptor", ret));
}
var config_descriptor = Marshal.PtrToStructure <ConfigDescriptor>(ptr);
for (int k = 0; k < config_descriptor.bNumInterfaces; k++)
{
var p = config_descriptor.interfaces + j * Marshal.SizeOf <@Interface>();
if (p == IntPtr.Zero)
{
continue;
}
var @interface = Marshal.PtrToStructure <@Interface>(p);
for (int l = 0; l < @interface.num_altsetting; l++)
{
var interface_descriptor = @interface.Altsetting[l];
// Ensure this is a DFU descriptor
if (interface_descriptor.bInterfaceClass != 0xfe || interface_descriptor.bInterfaceSubClass != 0x1)
{
continue;
}
var dfu_descriptor = FindDescriptor(interface_descriptor.extra, interface_descriptor.extra_length, (byte)Consts.USB_DT_DFU);
if (dfu_descriptor != null)
{
dfu_devices.Add(new DfuDevice(devices[i], interface_descriptor, dfu_descriptor.Value));
}
}
}
}
}
NativeMethods.libusb_free_device_list(list, 1);
return(dfu_devices);
}
internal static extern int libusb_get_device_descriptor(IntPtr dev, ref DeviceDescriptor desc);
