mirror of https://github.com/AxioDL/boo.git
261 lines
8.2 KiB
C++
261 lines
8.2 KiB
C++
#include "boo/inputdev/IHIDListener.hpp"
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#include "boo/inputdev/DeviceFinder.hpp"
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#include "boo/inputdev/HIDParser.hpp"
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#include <libudev.h>
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#include <cstring>
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#include <cstdio>
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#include <signal.h>
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#include <fcntl.h>
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#include <linux/hidraw.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <thread>
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namespace boo
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{
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static udev* UDEV_INST = nullptr;
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udev* GetUdev()
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{
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if (!UDEV_INST)
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UDEV_INST = udev_new();
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return UDEV_INST;
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}
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class HIDListenerUdev final : public IHIDListener
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{
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DeviceFinder& m_finder;
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udev_monitor* m_udevMon;
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std::thread m_udevThread;
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bool m_scanningEnabled;
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static void deviceConnected(HIDListenerUdev* listener,
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udev_device* device)
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{
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if (!listener->m_scanningEnabled)
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return;
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/* Prevent redundant registration */
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const char* devPath = udev_device_get_syspath(device);
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if (listener->m_finder._hasToken(devPath))
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return;
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/* Filter to USB/BT */
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const char* dt = udev_device_get_devtype(device);
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DeviceType type;
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int vid = 0, pid = 0;
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const char* manuf = nullptr;
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const char* product = nullptr;
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if (dt)
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{
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if (!strcmp(dt, "usb_device"))
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type = DeviceType::USB;
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else if (!strcmp(dt, "bluetooth_device"))
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type = DeviceType::Bluetooth;
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else
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return;
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udev_list_entry* attrs = udev_device_get_properties_list_entry(device);
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udev_list_entry* vide = udev_list_entry_get_by_name(attrs, "ID_VENDOR_ID");
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if (vide)
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vid = strtol(udev_list_entry_get_value(vide), nullptr, 16);
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udev_list_entry* pide = udev_list_entry_get_by_name(attrs, "ID_MODEL_ID");
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if (pide)
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pid = strtol(udev_list_entry_get_value(pide), nullptr, 16);
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udev_list_entry* manufe = udev_list_entry_get_by_name(attrs, "ID_VENDOR");
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if (manufe)
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manuf = udev_list_entry_get_value(manufe);
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udev_list_entry* producte = udev_list_entry_get_by_name(attrs, "ID_MODEL");
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if (producte)
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product = udev_list_entry_get_value(producte);
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}
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else if (!strcmp(udev_device_get_subsystem(device), "hidraw"))
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{
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type = DeviceType::HID;
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udev_device* parent = udev_device_get_parent(device);
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udev_list_entry* attrs = udev_device_get_properties_list_entry(parent);
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udev_list_entry* hidide = udev_list_entry_get_by_name(attrs, "HID_ID");
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if (hidide)
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{
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const char* hidid = udev_list_entry_get_value(hidide);
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const char* vids = strchr(hidid, ':') + 1;
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const char* pids = strchr(vids, ':') + 1;
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vid = strtol(vids, nullptr, 16);
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pid = strtol(pids, nullptr, 16);
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}
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udev_list_entry* hidnamee = udev_list_entry_get_by_name(attrs, "HID_NAME");
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if (hidnamee)
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{
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product = udev_list_entry_get_value(hidnamee);
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manuf = product;
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}
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/* Get device file */
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const char* dp = udev_device_get_devnode(device);
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int fd = open(dp, O_RDWR);
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if (fd < 0)
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return;
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/* Report descriptor size */
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int reportDescSize;
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if (ioctl(fd, HIDIOCGRDESCSIZE, &reportDescSize) == -1)
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{
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const char* err = strerror(errno);
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close(fd);
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return;
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}
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/* Get report descriptor */
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hidraw_report_descriptor reportDesc;
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reportDesc.size = reportDescSize;
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if (ioctl(fd, HIDIOCGRDESC, &reportDesc) == -1)
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{
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const char* err = strerror(errno);
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close(fd);
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return;
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}
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close(fd);
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std::pair<HIDUsagePage, HIDUsage> usage =
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HIDParser::GetApplicationUsage(reportDesc.value, reportDesc.size);
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if (usage.first != HIDUsagePage::GenericDesktop ||
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(usage.second != HIDUsage::Joystick && usage.second != HIDUsage::GamePad))
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return;
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}
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#if 0
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udev_list_entry* att = nullptr;
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udev_list_entry_foreach(att, attrs)
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{
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const char* name = udev_list_entry_get_name(att);
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const char* val = udev_list_entry_get_value(att);
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fprintf(stderr, "%s %s\n", name, val);
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}
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fprintf(stderr, "\n\n");
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#endif
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listener->m_finder._insertToken(
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std::make_unique<DeviceToken>(type, vid, pid, manuf, product, devPath));
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}
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static void deviceDisconnected(HIDListenerUdev* listener,
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udev_device* device)
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{
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const char* devPath = udev_device_get_syspath(device);
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listener->m_finder._removeToken(devPath);
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}
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static void _udevProc(HIDListenerUdev* listener)
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{
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udev_monitor_enable_receiving(listener->m_udevMon);
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int fd = udev_monitor_get_fd(listener->m_udevMon);
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while (true)
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{
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fd_set fds;
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FD_ZERO(&fds);
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FD_SET(fd, &fds);
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if (pselect(fd+1, &fds, nullptr, nullptr, nullptr, nullptr) < 0)
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{
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/* SIGTERM handled here */
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if (errno == EINTR)
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break;
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}
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int oldtype;
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pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldtype);
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udev_device* dev = udev_monitor_receive_device(listener->m_udevMon);
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if (dev)
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{
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const char* action = udev_device_get_action(dev);
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if (!strcmp(action, "add"))
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deviceConnected(listener, dev);
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else if (!strcmp(action, "remove"))
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deviceDisconnected(listener, dev);
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udev_device_unref(dev);
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}
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pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldtype);
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pthread_testcancel();
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}
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}
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public:
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HIDListenerUdev(DeviceFinder& finder)
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: m_finder(finder)
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{
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/* Setup hotplug events */
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m_udevMon = udev_monitor_new_from_netlink(GetUdev(), "udev");
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if (!m_udevMon)
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{
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fprintf(stderr, "unable to init udev_monitor");
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abort();
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}
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udev_monitor_filter_add_match_subsystem_devtype(m_udevMon, "usb", "usb_device");
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udev_monitor_filter_add_match_subsystem_devtype(m_udevMon, "bluetooth", "bluetooth_device");
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udev_monitor_filter_add_match_subsystem_devtype(m_udevMon, "hidraw", nullptr);
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udev_monitor_filter_update(m_udevMon);
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/* Initial HID Device Add */
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m_scanningEnabled = true;
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scanNow();
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m_scanningEnabled = false;
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/* Start hotplug thread */
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m_udevThread = std::thread(_udevProc, this);
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}
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~HIDListenerUdev()
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{
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pthread_cancel(m_udevThread.native_handle());
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if (m_udevThread.joinable())
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m_udevThread.join();
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udev_monitor_unref(m_udevMon);
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}
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/* Automatic device scanning */
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bool startScanning()
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{
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m_scanningEnabled = true;
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return true;
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}
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bool stopScanning()
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{
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m_scanningEnabled = false;
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return true;
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}
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/* Manual device scanning */
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bool scanNow()
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{
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udev_enumerate* uenum = udev_enumerate_new(GetUdev());
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udev_enumerate_add_match_subsystem(uenum, "usb");
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udev_enumerate_add_match_subsystem(uenum, "bluetooth");
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udev_enumerate_add_match_subsystem(uenum, "hidraw");
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udev_enumerate_scan_devices(uenum);
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udev_list_entry* uenumList = udev_enumerate_get_list_entry(uenum);
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udev_list_entry* uenumItem;
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udev_list_entry_foreach(uenumItem, uenumList)
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{
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const char* devPath = udev_list_entry_get_name(uenumItem);
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udev_device* dev = udev_device_new_from_syspath(UDEV_INST, devPath);
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if (dev)
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deviceConnected(this, dev);
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udev_device_unref(dev);
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}
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udev_enumerate_unref(uenum);
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return true;
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}
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};
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std::unique_ptr<IHIDListener> IHIDListenerNew(DeviceFinder& finder)
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{
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return std::make_unique<HIDListenerUdev>(finder);
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}
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}
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