Function netdev_low_level_set_link_status

components/net/netdev/src/netdev.c:1070–1105

* This function will set network interface device active link status. * @NOTE it can only be called in the network interface device driver. * * @param netdev the network interface device to change * @param is_up the new link status */

 * @param is_up the new link status
 */
void netdev_low_level_set_link_status(struct netdev *netdev, rt_bool_t is_up)
{
    if (netdev && netdev_is_link_up(netdev) != is_up)
    {
        if (is_up)
        {
            netdev->flags |= NETDEV_FLAG_LINK_UP;

#ifdef RT_USING_SAL
            /* set network interface device flags to internet up */
            if (netdev_is_up(netdev) && !ip_addr_isany(&(netdev->ip_addr)))
            {
                sal_check_netdev_internet_up(netdev);
            }
#endif /* RT_USING_SAL */
        }
        else
        {
            netdev->flags &= ~NETDEV_FLAG_LINK_UP;

            /* set network interface device flags to internet down */
            netdev->flags &= ~NETDEV_FLAG_INTERNET_UP;

#ifdef NETDEV_USING_AUTO_DEFAULT
            /* change to the first link_up network interface device automatically */
            netdev_auto_change_default(netdev);
#endif /* NETDEV_USING_AUTO_DEFAULT */
        }

        /* execute link status change callback function */
        if (netdev->status_callback)
        {
            netdev->status_callback(netdev, is_up ? NETDEV_CB_STATUS_LINK_UP : NETDEV_CB_STATUS_LINK_DOWN);
        }
    }
}

/**
 * This function will set network interface device active internet status.