/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2015-2017 Vladimir Kondratyev <wulf@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/kbio.h>
#include <sys/sysctl.h>

#include <dev/evdev/input.h>
#include <dev/evdev/uinput.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>

#include <assert.h>
#define L2CAP_SOCKET_CHECKED
#include <bluetooth.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <usbhid.h>

#include "bthid_config.h"
#include "bthidd.h"
#include "btuinput.h"

static int16_t const mbuttons[8] = {
        BTN_LEFT,
        BTN_MIDDLE,
        BTN_RIGHT,
        BTN_SIDE,
        BTN_EXTRA,
        BTN_FORWARD,
        BTN_BACK,
        BTN_TASK
};

static uint16_t const led_codes[3] = {
        LED_CAPSL,      /* CLKED */
        LED_NUML,       /* NLKED */
        LED_SCROLLL,    /* SLKED */
};

#define NONE    KEY_RESERVED

static uint16_t const keymap[0x100] = {
        /* 0x00 - 0x27 */
        NONE,   NONE,   NONE,   NONE,   KEY_A,  KEY_B,  KEY_C,  KEY_D,
        KEY_E,  KEY_F,  KEY_G,  KEY_H,  KEY_I,  KEY_J,  KEY_K,  KEY_L,
        KEY_M,  KEY_N,  KEY_O,  KEY_P,  KEY_Q,  KEY_R,  KEY_S,  KEY_T,
        KEY_U,  KEY_V,  KEY_W,  KEY_X,  KEY_Y,  KEY_Z,  KEY_1,  KEY_2,
        KEY_3,  KEY_4,  KEY_5,  KEY_6,  KEY_7,  KEY_8,  KEY_9,  KEY_0,
        /* 0x28 - 0x3f */
        KEY_ENTER,      KEY_ESC,        KEY_BACKSPACE,  KEY_TAB,
        KEY_SPACE,      KEY_MINUS,      KEY_EQUAL,      KEY_LEFTBRACE,
        KEY_RIGHTBRACE, KEY_BACKSLASH,  KEY_BACKSLASH,  KEY_SEMICOLON,
        KEY_APOSTROPHE, KEY_GRAVE,      KEY_COMMA,      KEY_DOT,
        KEY_SLASH,      KEY_CAPSLOCK,   KEY_F1,         KEY_F2,
        KEY_F3,         KEY_F4,         KEY_F5,         KEY_F6,
        /* 0x40 - 0x5f */
        KEY_F7,         KEY_F8,         KEY_F9,         KEY_F10,
        KEY_F11,        KEY_F12,        KEY_SYSRQ,      KEY_SCROLLLOCK,
        KEY_PAUSE,      KEY_INSERT,     KEY_HOME,       KEY_PAGEUP,
        KEY_DELETE,     KEY_END,        KEY_PAGEDOWN,   KEY_RIGHT,
        KEY_LEFT,       KEY_DOWN,       KEY_UP,         KEY_NUMLOCK,
        KEY_KPSLASH,    KEY_KPASTERISK, KEY_KPMINUS,    KEY_KPPLUS,
        KEY_KPENTER,    KEY_KP1,        KEY_KP2,        KEY_KP3,
        KEY_KP4,        KEY_KP5,        KEY_KP6,        KEY_KP7,
        /* 0x60 - 0x7f */
        KEY_KP8,        KEY_KP9,        KEY_KP0,        KEY_KPDOT,
        KEY_102ND,      KEY_COMPOSE,    KEY_POWER,      KEY_KPEQUAL,
        KEY_F13,        KEY_F14,        KEY_F15,        KEY_F16,
        KEY_F17,        KEY_F18,        KEY_F19,        KEY_F20,
        KEY_F21,        KEY_F22,        KEY_F23,        KEY_F24,
        KEY_OPEN,       KEY_HELP,       KEY_PROPS,      KEY_FRONT,
        KEY_STOP,       KEY_AGAIN,      KEY_UNDO,       KEY_CUT,
        KEY_COPY,       KEY_PASTE,      KEY_FIND,       KEY_MUTE,
        /* 0x80 - 0x9f */
        KEY_VOLUMEUP,   KEY_VOLUMEDOWN, NONE,           NONE,
        NONE,           KEY_KPCOMMA,    NONE,           KEY_RO,
        KEY_KATAKANAHIRAGANA,   KEY_YEN,KEY_HENKAN,     KEY_MUHENKAN,
        KEY_KPJPCOMMA,  NONE,           NONE,           NONE,
        KEY_HANGEUL,    KEY_HANJA,      KEY_KATAKANA,   KEY_HIRAGANA,
        KEY_ZENKAKUHANKAKU,     NONE,   NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        /* 0xa0 - 0xbf */
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        /* 0xc0 - 0xdf */
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        NONE,           NONE,           NONE,           NONE,
        /* 0xe0 - 0xff */
        KEY_LEFTCTRL,   KEY_LEFTSHIFT,  KEY_LEFTALT,    KEY_LEFTMETA,
        KEY_RIGHTCTRL,  KEY_RIGHTSHIFT, KEY_RIGHTALT,   KEY_RIGHTMETA,
        KEY_PLAYPAUSE,  KEY_STOPCD,     KEY_PREVIOUSSONG,KEY_NEXTSONG,
        KEY_EJECTCD,    KEY_VOLUMEUP,   KEY_VOLUMEDOWN, KEY_MUTE,
        KEY_WWW,        KEY_BACK,       KEY_FORWARD,    KEY_STOP,
        KEY_FIND,       KEY_SCROLLUP,   KEY_SCROLLDOWN, KEY_EDIT,
        KEY_SLEEP,      KEY_COFFEE,     KEY_REFRESH,    KEY_CALC,
        NONE,           NONE,           NONE,           NONE,
};

/* Consumer page usage mapping */
static uint16_t const consmap[0x300] = {
        [0x030] = KEY_POWER,
        [0x031] = KEY_RESTART,
        [0x032] = KEY_SLEEP,
        [0x034] = KEY_SLEEP,
        [0x035] = KEY_KBDILLUMTOGGLE,
        [0x036] = BTN_MISC,
        [0x040] = KEY_MENU,
        [0x041] = KEY_SELECT,
        [0x042] = KEY_UP,
        [0x043] = KEY_DOWN,
        [0x044] = KEY_LEFT,
        [0x045] = KEY_RIGHT,
        [0x046] = KEY_ESC,
        [0x047] = KEY_KPPLUS,
        [0x048] = KEY_KPMINUS,
        [0x060] = KEY_INFO,
        [0x061] = KEY_SUBTITLE,
        [0x063] = KEY_VCR,
        [0x065] = KEY_CAMERA,
        [0x069] = KEY_RED,
        [0x06a] = KEY_GREEN,
        [0x06b] = KEY_BLUE,
        [0x06c] = KEY_YELLOW,
        [0x06d] = KEY_ZOOM,
        [0x06f] = KEY_BRIGHTNESSUP,
        [0x070] = KEY_BRIGHTNESSDOWN,
        [0x072] = KEY_BRIGHTNESS_TOGGLE,
        [0x073] = KEY_BRIGHTNESS_MIN,
        [0x074] = KEY_BRIGHTNESS_MAX,
        [0x075] = KEY_BRIGHTNESS_AUTO,
        [0x082] = KEY_VIDEO_NEXT,
        [0x083] = KEY_LAST,
        [0x084] = KEY_ENTER,
        [0x088] = KEY_PC,
        [0x089] = KEY_TV,
        [0x08a] = KEY_WWW,
        [0x08b] = KEY_DVD,
        [0x08c] = KEY_PHONE,
        [0x08d] = KEY_PROGRAM,
        [0x08e] = KEY_VIDEOPHONE,
        [0x08f] = KEY_GAMES,
        [0x090] = KEY_MEMO,
        [0x091] = KEY_CD,
        [0x092] = KEY_VCR,
        [0x093] = KEY_TUNER,
        [0x094] = KEY_EXIT,
        [0x095] = KEY_HELP,
        [0x096] = KEY_TAPE,
        [0x097] = KEY_TV2,
        [0x098] = KEY_SAT,
        [0x09a] = KEY_PVR,
        [0x09c] = KEY_CHANNELUP,
        [0x09d] = KEY_CHANNELDOWN,
        [0x0a0] = KEY_VCR2,
        [0x0b0] = KEY_PLAY,
        [0x0b1] = KEY_PAUSE,
        [0x0b2] = KEY_RECORD,
        [0x0b3] = KEY_FASTFORWARD,
        [0x0b4] = KEY_REWIND,
        [0x0b5] = KEY_NEXTSONG,
        [0x0b6] = KEY_PREVIOUSSONG,
        [0x0b7] = KEY_STOPCD,
        [0x0b8] = KEY_EJECTCD,
        [0x0bc] = KEY_MEDIA_REPEAT,
        [0x0b9] = KEY_SHUFFLE,
        [0x0bf] = KEY_SLOW,
        [0x0cd] = KEY_PLAYPAUSE,
        [0x0cf] = KEY_VOICECOMMAND,
        [0x0e2] = KEY_MUTE,
        [0x0e5] = KEY_BASSBOOST,
        [0x0e9] = KEY_VOLUMEUP,
        [0x0ea] = KEY_VOLUMEDOWN,
        [0x0f5] = KEY_SLOW,
        [0x181] = KEY_BUTTONCONFIG,
        [0x182] = KEY_BOOKMARKS,
        [0x183] = KEY_CONFIG,
        [0x184] = KEY_WORDPROCESSOR,
        [0x185] = KEY_EDITOR,
        [0x186] = KEY_SPREADSHEET,
        [0x187] = KEY_GRAPHICSEDITOR,
        [0x188] = KEY_PRESENTATION,
        [0x189] = KEY_DATABASE,
        [0x18a] = KEY_MAIL,
        [0x18b] = KEY_NEWS,
        [0x18c] = KEY_VOICEMAIL,
        [0x18d] = KEY_ADDRESSBOOK,
        [0x18e] = KEY_CALENDAR,
        [0x18f] = KEY_TASKMANAGER,
        [0x190] = KEY_JOURNAL,
        [0x191] = KEY_FINANCE,
        [0x192] = KEY_CALC,
        [0x193] = KEY_PLAYER,
        [0x194] = KEY_FILE,
        [0x196] = KEY_WWW,
        [0x199] = KEY_CHAT,
        [0x19c] = KEY_LOGOFF,
        [0x19e] = KEY_COFFEE,
        [0x19f] = KEY_CONTROLPANEL,
        [0x1a2] = KEY_APPSELECT,
        [0x1a3] = KEY_NEXT,
        [0x1a4] = KEY_PREVIOUS,
        [0x1a6] = KEY_HELP,
        [0x1a7] = KEY_DOCUMENTS,
        [0x1ab] = KEY_SPELLCHECK,
        [0x1ae] = KEY_KEYBOARD,
        [0x1b1] = KEY_SCREENSAVER,
        [0x1b4] = KEY_FILE,
        [0x1b6] = KEY_IMAGES,
        [0x1b7] = KEY_AUDIO,
        [0x1b8] = KEY_VIDEO,
        [0x1bc] = KEY_MESSENGER,
        [0x1bd] = KEY_INFO,
        [0x201] = KEY_NEW,
        [0x202] = KEY_OPEN,
        [0x203] = KEY_CLOSE,
        [0x204] = KEY_EXIT,
        [0x207] = KEY_SAVE,
        [0x208] = KEY_PRINT,
        [0x209] = KEY_PROPS,
        [0x21a] = KEY_UNDO,
        [0x21b] = KEY_COPY,
        [0x21c] = KEY_CUT,
        [0x21d] = KEY_PASTE,
        [0x21f] = KEY_FIND,
        [0x221] = KEY_SEARCH,
        [0x222] = KEY_GOTO,
        [0x223] = KEY_HOMEPAGE,
        [0x224] = KEY_BACK,
        [0x225] = KEY_FORWARD,
        [0x226] = KEY_STOP,
        [0x227] = KEY_REFRESH,
        [0x22a] = KEY_BOOKMARKS,
        [0x22d] = KEY_ZOOMIN,
        [0x22e] = KEY_ZOOMOUT,
        [0x22f] = KEY_ZOOMRESET,
        [0x233] = KEY_SCROLLUP,
        [0x234] = KEY_SCROLLDOWN,
        [0x23d] = KEY_EDIT,
        [0x25f] = KEY_CANCEL,
        [0x269] = KEY_INSERT,
        [0x26a] = KEY_DELETE,
        [0x279] = KEY_REDO,
        [0x289] = KEY_REPLY,
        [0x28b] = KEY_FORWARDMAIL,
        [0x28c] = KEY_SEND,
        [0x2c7] = KEY_KBDINPUTASSIST_PREV,
        [0x2c8] = KEY_KBDINPUTASSIST_NEXT,
        [0x2c9] = KEY_KBDINPUTASSIST_PREVGROUP,
        [0x2ca] = KEY_KBDINPUTASSIST_NEXTGROUP,
        [0x2cb] = KEY_KBDINPUTASSIST_ACCEPT,
        [0x2cc] = KEY_KBDINPUTASSIST_CANCEL,
};

static int32_t
uinput_open_common(hid_device_p const p, bdaddr_p local, const uint8_t *name)
{
        struct uinput_setup     uisetup;
        uint8_t                 phys[UINPUT_MAX_NAME_SIZE];
        uint8_t                 uniq[UINPUT_MAX_NAME_SIZE];
        int32_t                 fd;

        /* Take local and remote bdaddr */
        bt_ntoa(local, phys);
        bt_ntoa(&p->bdaddr, uniq);

        /* Take device name from bthidd.conf. Fallback to generic name. */
        if (p->name != NULL)
                name = p->name;

        /* Set device name and bus/vendor information */
        memset(&uisetup, 0, sizeof(uisetup));
        snprintf(uisetup.name, UINPUT_MAX_NAME_SIZE,
            "%s, bdaddr %s", name, uniq);
        uisetup.id.bustype = BUS_BLUETOOTH;
        uisetup.id.vendor  = p->vendor_id;
        uisetup.id.product = p->product_id;
        uisetup.id.version = p->version;

        fd = open("/dev/uinput", O_RDWR | O_NONBLOCK);

        if (ioctl(fd, UI_SET_PHYS, phys) < 0 ||
            ioctl(fd, UI_SET_BSDUNIQ, uniq) < 0 ||
            ioctl(fd, UI_DEV_SETUP, &uisetup) < 0)
                return (-1);

        return (fd);
}

/*
 * Setup uinput device as 8button mouse with wheel(s)
 * TODO: bring in more feature detection code from ums
 */
int32_t
uinput_open_mouse(hid_device_p const p, bdaddr_p local)
{
        size_t  i;
        int32_t fd;

        assert(p != NULL);

        if ((fd = uinput_open_common(p, local, "Bluetooth Mouse")) < 0)
                goto bail_out;

        /* Advertise events and axes */
        if (ioctl(fd, UI_SET_EVBIT, EV_SYN) < 0 ||
            ioctl(fd, UI_SET_EVBIT, EV_KEY) < 0 ||
            ioctl(fd, UI_SET_EVBIT, EV_REL) < 0 ||
            ioctl(fd, UI_SET_RELBIT, REL_X) < 0 ||
            ioctl(fd, UI_SET_RELBIT, REL_Y) < 0 ||
            (p->has_wheel && ioctl(fd, UI_SET_RELBIT, REL_WHEEL) < 0) ||
            (p->has_hwheel && ioctl(fd, UI_SET_RELBIT, REL_HWHEEL) < 0) ||
            ioctl(fd, UI_SET_PROPBIT, INPUT_PROP_POINTER) < 0)
                goto bail_out;

        /* Advertise mouse buttons */
        for (i = 0; i < nitems(mbuttons); i++)
                if (ioctl(fd, UI_SET_KEYBIT, mbuttons[i]) < 0)
                        goto bail_out;

        if (ioctl(fd, UI_DEV_CREATE) >= 0)
                return (fd); /* SUCCESS */

bail_out:
        if (fd >= 0)
                close(fd);
        return (-1);
}

/*
 * Setup uinput keyboard
 */
int32_t
uinput_open_keyboard(hid_device_p const p, bdaddr_p local)
{
        size_t  i;
        int32_t fd;

        assert(p != NULL);

        if ((fd = uinput_open_common(p, local, "Bluetooth Keyboard")) < 0)
                goto bail_out;

        /* Advertise key events and LEDs */
        if (ioctl(fd, UI_SET_EVBIT, EV_KEY) < 0 ||
            ioctl(fd, UI_SET_EVBIT, EV_LED) < 0 ||
            ioctl(fd, UI_SET_EVBIT, EV_SYN) < 0 ||
            ioctl(fd, UI_SET_EVBIT, EV_REP) < 0 ||
            ioctl(fd, UI_SET_LEDBIT, LED_CAPSL) < 0 ||
            ioctl(fd, UI_SET_LEDBIT, LED_NUML) < 0 ||
            ioctl(fd, UI_SET_LEDBIT, LED_SCROLLL))
                goto bail_out;

        /* Advertise keycodes */
        for (i = 0; i < nitems(keymap); i++)
                if (keymap[i] != NONE &&
                    ioctl(fd, UI_SET_KEYBIT, keymap[i]) < 0)
                        goto bail_out;

        /* Advertise consumer page keys if any */
        if (p->has_cons) {
                for (i = 0; i < nitems(consmap); i++) {
                        if (consmap[i] != NONE &&
                            ioctl(fd, UI_SET_KEYBIT, consmap[i]) < 0)
                                goto bail_out;
                }
        }

        if (ioctl(fd, UI_DEV_CREATE) >= 0)
                return (fd); /* SUCCESS */

bail_out:
        if (fd >= 0)
                close(fd);
        return (-1);
}

/* from sys/dev/evdev/evdev.h */
#define EVDEV_RCPT_HW_MOUSE     (1<<2)
#define EVDEV_RCPT_HW_KBD       (1<<3)

#define MASK_POLL_INTERVAL      5 /* seconds */
#define MASK_SYSCTL             "kern.evdev.rcpt_mask"

static int32_t
uinput_get_rcpt_mask(void)
{
        static struct timespec last = { 0, 0 };
        struct timespec now;
        static int32_t mask = 0;
        size_t len;
        time_t elapsed;

        if (clock_gettime(CLOCK_MONOTONIC_FAST, &now) == -1)
                return mask;

        elapsed = now.tv_sec - last.tv_sec;
        if (now.tv_nsec < last.tv_nsec)
                elapsed--;

        if (elapsed >= MASK_POLL_INTERVAL) {
                len = sizeof(mask);
                if (sysctlbyname(MASK_SYSCTL, &mask, &len, NULL, 0) < 0) {
                        if (errno == ENOENT)
                                /* kernel is compiled w/o EVDEV_SUPPORT */
                                mask = EVDEV_RCPT_HW_MOUSE | EVDEV_RCPT_HW_KBD;
                        else
                                mask = 0;
                }
                last = now;
        }
        return mask;
}

static int32_t
uinput_write_event(int32_t fd, uint16_t type, uint16_t code, int32_t value)
{
        struct input_event ie;

        assert(fd >= 0);

        memset(&ie, 0, sizeof(ie));
        ie.type = type;
        ie.code = code;
        ie.value = value;
        return (write(fd, &ie, sizeof(ie)));
}

int32_t
uinput_rep_mouse(int32_t fd, int32_t x, int32_t y, int32_t z, int32_t t,
    int32_t buttons, int32_t obuttons)
{
        size_t i;
        int32_t rcpt_mask, mask;

        assert(fd >= 0);

        rcpt_mask = uinput_get_rcpt_mask();
        if (!(rcpt_mask & EVDEV_RCPT_HW_MOUSE))
                return (0);

        if ((x != 0 && uinput_write_event(fd, EV_REL, REL_X, x) < 0) ||
            (y != 0 && uinput_write_event(fd, EV_REL, REL_Y, y) < 0) ||
            (z != 0 && uinput_write_event(fd, EV_REL, REL_WHEEL, -z) < 0) ||
            (t != 0 && uinput_write_event(fd, EV_REL, REL_HWHEEL, t) < 0))
                return (-1);

        for (i = 0; i < nitems(mbuttons); i++) {
                mask = 1 << i;
                if ((buttons & mask) == (obuttons & mask))
                        continue;
                if (uinput_write_event(fd, EV_KEY, mbuttons[i],
                    (buttons & mask) != 0) < 0)
                        return (-1);
        }

        if (uinput_write_event(fd, EV_SYN, SYN_REPORT, 0) < 0)
                return (-1);

        return (0);
}

/*
 * Translate and report keyboard page key events
 */
int32_t
uinput_rep_key(int32_t fd, int32_t key, int32_t make)
{
        int32_t rcpt_mask;

        assert(fd >= 0);

        rcpt_mask = uinput_get_rcpt_mask();
        if (!(rcpt_mask & EVDEV_RCPT_HW_KBD))
                return (0);

        if (key >= 0 && key < (int32_t)nitems(keymap) &&
            keymap[key] != NONE) {
                if (uinput_write_event(fd, EV_KEY, keymap[key], make) > 0 &&
                    uinput_write_event(fd, EV_SYN, SYN_REPORT, 0) > 0)
                        return (0);
        }
        return (-1);
}

/*
 * Translate and report consumer page key events
 */
int32_t
uinput_rep_cons(int32_t fd, int32_t key, int32_t make)
{
        int32_t rcpt_mask;

        assert(fd >= 0);

        rcpt_mask = uinput_get_rcpt_mask();
        if (!(rcpt_mask & EVDEV_RCPT_HW_KBD))
                return (0);

        if (key >= 0 && key < (int32_t)nitems(consmap) &&
            consmap[key] != NONE) {
                if (uinput_write_event(fd, EV_KEY, consmap[key], make) > 0 &&
                    uinput_write_event(fd, EV_SYN, SYN_REPORT, 0) > 0)
                        return (0);
        }
        return (-1);
}

/*
 * Translate and report LED events
 */
int32_t
uinput_rep_leds(int32_t fd, int state, int mask)
{
        size_t i;
        int32_t rcpt_mask;

        assert(fd >= 0);

        rcpt_mask = uinput_get_rcpt_mask();
        if (!(rcpt_mask & EVDEV_RCPT_HW_KBD))
                return (0);

        for (i = 0; i < nitems(led_codes); i++) {
                if (mask & (1 << i) &&
                    uinput_write_event(fd, EV_LED, led_codes[i],
                                        state & (1 << i) ? 1 : 0) < 0)
                        return (-1);
        }

        return (0);
}

/*
 * Process status change from evdev
 */
int32_t
uinput_kbd_status_changed(bthid_session_p s, uint8_t *data, int32_t len)
{
        struct input_event ie;
        int32_t leds, oleds;
        size_t i;

        assert(s != NULL);
        assert(s->vkbd >= 0);
        assert(len == sizeof(struct input_event));

        memcpy(&ie, data, sizeof(ie));
        switch (ie.type) {
        case EV_LED:
                ioctl(s->vkbd, KDGETLED, &oleds);
                leds = oleds;
                for (i = 0; i < nitems(led_codes); i++) {
                        if (led_codes[i] == ie.code) {
                                if (ie.value)
                                        leds |= 1 << i;
                                else
                                        leds &= ~(1 << i);
                                if (leds != oleds)
                                        ioctl(s->vkbd, KDSETLED, leds);
                                break;
                        }
                }
                break;
        case EV_REP:
                /* FALLTHROUGH. Repeats are handled by evdev subsystem */
        default:
                break;
        }

        return (0);
}