141 lines
No EOL
3.9 KiB
C
141 lines
No EOL
3.9 KiB
C
#include "virt_mouse.h"
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#include <linux/input-event-codes.h>
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#include <linux/input.h>
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#include <sys/time.h>
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int virt_mouse_init(virt_mouse_t *const mouse) {
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int ret = -EINVAL;
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mouse->status_recv = 0;
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int fd = open("/dev/uinput", O_RDWR);
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if(fd < 0) {
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ret = errno;
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goto virt_mouse_init_err;
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}
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ioctl(fd, UI_SET_EVBIT, EV_REL);
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ioctl(fd, UI_SET_EVBIT, EV_KEY);
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ioctl(fd, UI_SET_EVBIT, EV_MSC);
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ioctl(fd, UI_SET_EVBIT, EV_SYN);
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ioctl(fd, UI_SET_MSCBIT, MSC_TIMESTAMP);
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ioctl(fd, UI_SET_KEYBIT, BTN_LEFT);
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ioctl(fd, UI_SET_KEYBIT, BTN_MIDDLE);
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ioctl(fd, UI_SET_KEYBIT, BTN_RIGHT);
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ioctl(fd, UI_SET_RELBIT, REL_X);
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ioctl(fd, UI_SET_RELBIT, REL_Y);
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ioctl(fd, UI_SET_RELBIT, REL_WHEEL);
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ioctl(fd, UI_SET_RELBIT, REL_WHEEL_HI_RES);
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struct uinput_setup dev = {0};
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strncpy(dev.name, VIRT_MOUSE_DEV_NAME, UINPUT_MAX_NAME_SIZE-1);
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dev.id.bustype = BUS_VIRTUAL;
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dev.id.vendor = VIRT_MOUSE_DEV_VENDOR_ID;
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dev.id.product = VIRT_MOUSE_DEV_PRODUCT_ID;
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dev.id.version = VIRT_MOUSE_DEV_VERSION;
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if(ioctl(fd, UI_DEV_SETUP, &dev) < 0) {
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ret = errno > 0 ? errno : -1 * errno;
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ret = ret == 0 ? -EIO : ret;
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goto virt_mouse_init_err;
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}
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if(ioctl(fd, UI_DEV_CREATE) < 0) {
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ret = errno > 0 ? errno : -1 * errno;
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ret = ret == 0 ? -EIO : ret;
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goto virt_mouse_init_err;
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}
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// initialization ok
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mouse->prev_btn_left = 0;
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mouse->prev_btn_right = 0;
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mouse->prev_btn_middle = 0;
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mouse->fd = fd;
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ret = 0;
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virt_mouse_init_err:
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if (ret != 0) {
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mouse->fd = -1;
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close(fd);
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}
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return ret;
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}
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int virt_mouse_get_fd(virt_mouse_t *const mouse) {
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return mouse->fd;
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}
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int virt_mouse_send(virt_mouse_t *const mouse, mouse_status_t *const status, struct timeval *const now) {
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int res = 0;
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struct input_event tmp_ev;
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if (now == NULL) {
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gettimeofday(&tmp_ev.time, NULL);
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} else {
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tmp_ev.time = *now;
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}
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tmp_ev.type = EV_REL;
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if (status->x > 0) {
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tmp_ev.code = REL_X;
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tmp_ev.value = status->x;
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if (write(mouse->fd, &tmp_ev, sizeof(tmp_ev)) != sizeof(struct input_event)) {
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res = errno < 0 ? errno : -1 * errno;
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goto virt_mouse_send_err;
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} else {
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status->x = 0;
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}
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}
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if (status->y > 0) {
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tmp_ev.code = REL_Y;
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tmp_ev.value = status->y;
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if (write(mouse->fd, &tmp_ev, sizeof(tmp_ev)) != sizeof(struct input_event)) {
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res = errno < 0 ? errno : -1 * errno;
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goto virt_mouse_send_err;
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} else {
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status->y = 0;
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}
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}
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tmp_ev.type = EV_KEY;
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if (status->btn_left != mouse->prev_btn_left) {
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mouse->prev_btn_left = status->btn_left;
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tmp_ev.code = BTN_LEFT;
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tmp_ev.value = status->btn_left;
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if (write(mouse->fd, &tmp_ev, sizeof(tmp_ev)) != sizeof(struct input_event)) {
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res = errno < 0 ? errno : -1 * errno;
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goto virt_mouse_send_err;
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}
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}
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if (status->btn_middle != mouse->prev_btn_middle) {
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mouse->prev_btn_middle = status->btn_middle;
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tmp_ev.code = BTN_MIDDLE;
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tmp_ev.value = status->btn_middle;
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if (write(mouse->fd, &tmp_ev, sizeof(tmp_ev)) != sizeof(struct input_event)) {
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res = errno < 0 ? errno : -1 * errno;
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goto virt_mouse_send_err;
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}
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}
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if (status->btn_right != mouse->prev_btn_right) {
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mouse->prev_btn_right = status->btn_right;
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tmp_ev.code = BTN_RIGHT;
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tmp_ev.value = status->btn_right;
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if (write(mouse->fd, &tmp_ev, sizeof(tmp_ev)) != sizeof(struct input_event)) {
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res = errno < 0 ? errno : -1 * errno;
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goto virt_mouse_send_err;
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}
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}
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virt_mouse_send_err:
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return res;
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}
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void virt_mouse_close(virt_mouse_t *const mouse) {
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close(mouse->fd);
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} |