mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
/* Helpers for USB node-types.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <villas/exceptions.hpp>
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#include <libusb-1.0/libusb.h>
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namespace villas {
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namespace usb {
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struct Filter {
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int bus;
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int port;
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int vendor_id;
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int product_id;
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};
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class Error : public std::runtime_error {
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protected:
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enum libusb_error err;
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char *msg;
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public:
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Error(enum libusb_error e, const std::string &what)
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: std::runtime_error(what), err(e) {
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int ret __attribute__((unused));
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ret = asprintf(&msg, "%s: %s", std::runtime_error::what(),
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libusb_strerror(err));
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}
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template <typename... Args>
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Error(enum libusb_error e, const std::string &what, Args &&...args)
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: usb::Error(e, fmt::format(what, std::forward<Args>(args)...)) {}
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// Same as above but with int
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Error(int e, const std::string &what)
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: usb::Error((enum libusb_error)e, what) {}
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template <typename... Args>
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Error(int e, const std::string &what, Args &&...args)
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: usb::Error((enum libusb_error)e, what, std::forward<Args>(args)...) {}
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~Error() {
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if (msg)
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free(msg);
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}
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virtual const char *what() const noexcept { return msg; }
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};
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class Device {
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protected:
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struct libusb_device *device;
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struct libusb_device_handle *handle;
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struct libusb_device_descriptor desc;
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std::string getStringDescriptor(uint8_t desc_id) const;
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public:
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Device(struct libusb_device *dev) : device(dev), handle(nullptr) {}
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const struct libusb_device_descriptor &getDescriptor() const { return desc; }
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int getBus() const { return libusb_get_bus_number(device); }
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int getPort() const { return libusb_get_port_number(device); }
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std::string getManufacturer() const {
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return getStringDescriptor(desc.iManufacturer);
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}
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std::string getProduct() const { return getStringDescriptor(desc.iProduct); }
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std::string getSerial() const {
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return getStringDescriptor(desc.iSerialNumber);
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}
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bool match(const Filter *flt) const;
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};
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struct libusb_context *init();
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void deinit_context(struct libusb_context *ctx);
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struct libusb_context *get_context();
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void detach(struct libusb_device_handle *hdl, int iface);
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} // namespace usb
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} // namespace villas
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