from libusb.h:1013
struct libusb_platform_descriptor
{
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bDevCapabilityType;
uint8_t bReserved;
uint8_t PlatformCapabilityUUID[16];
uint8_t CapabilityData[LIBUSB_FLEXIBLE_ARRAY];
};