isUsbMassStorageDevice()

// Returns true if this UsbDevice has the necessary interface and endpoints to qualify as a UsbMassStorageDevice.
fun UsbDevice.isUsbMassStorageDevice(): Boolean {
    (0 until this.interfaceCount).map { getInterface(it) }
        .filter { it.interfaceClass == UsbConstants.USB_CLASS_MASS_STORAGE }
        .map { usbInterface ->
            logMessage("Tools", "Found usb interface: $usbInterface")

            // Every mass storage device has exactly two endpoints
            // One IN and one OUT endpoint
            val endpointCount = usbInterface.endpointCount
            if (endpointCount != 2) {
                logMessage("Tools", "Interface endpoint count != 2")
            }

            var outEndpoint: UsbEndpoint? = null
            var inEndpoint: UsbEndpoint? = null

            for (j in 0 until endpointCount) {
                val endpoint = usbInterface.getEndpoint(j)
                logMessage("Tools", "Found usb endpoint: $endpoint")
                if (endpoint.type == UsbConstants.USB_ENDPOINT_XFER_BULK) {
                    if (endpoint.direction == UsbConstants.USB_DIR_OUT) {
                        outEndpoint = endpoint
                    } else {
                        inEndpoint = endpoint
                    }
                }
            }

            if (outEndpoint == null || inEndpoint == null) {
                logMessage("Tools", "Not all needed endpoints found. In: ${outEndpoint != null}, Out: ${outEndpoint != null}")
                return@map null
            } else {
                return true
            }
        }
    return false
}