/* Helpers for USB node-types. * * Author: Steffen Vogel * SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University * SPDX-License-Identifier: Apache-2.0 */ #pragma once #include #include namespace villas { namespace usb { struct Filter { int bus; int port; int vendor_id; int product_id; }; class Error : public std::runtime_error { protected: enum libusb_error err; char *msg; public: Error(enum libusb_error e, const std::string &what) : std::runtime_error(what), err(e) { int ret __attribute__((unused)); ret = asprintf(&msg, "%s: %s", std::runtime_error::what(), libusb_strerror(err)); } template Error(enum libusb_error e, const std::string &what, Args &&...args) : usb::Error(e, fmt::format(what, std::forward(args)...)) {} // Same as above but with int Error(int e, const std::string &what) : usb::Error((enum libusb_error)e, what) {} template Error(int e, const std::string &what, Args &&...args) : usb::Error((enum libusb_error)e, what, std::forward(args)...) {} ~Error() { if (msg) free(msg); } virtual const char *what() const noexcept { return msg; } }; class Device { protected: struct libusb_device *device; struct libusb_device_handle *handle; struct libusb_device_descriptor desc; std::string getStringDescriptor(uint8_t desc_id) const; public: Device(struct libusb_device *dev) : device(dev), handle(nullptr) {} const struct libusb_device_descriptor &getDescriptor() const { return desc; } int getBus() const { return libusb_get_bus_number(device); } int getPort() const { return libusb_get_port_number(device); } std::string getManufacturer() const { return getStringDescriptor(desc.iManufacturer); } std::string getProduct() const { return getStringDescriptor(desc.iProduct); } std::string getSerial() const { return getStringDescriptor(desc.iSerialNumber); } bool match(const Filter *flt) const; }; struct libusb_context *init(); void deinit_context(struct libusb_context *ctx); struct libusb_context *get_context(); void detach(struct libusb_device_handle *hdl, int iface); } // namespace usb } // namespace villas