Function netdev_set_dns_server

components/net/netdev/src/netdev.c:777–796

* This function will set network interface device DNS server address. * * @param netdev the network interface device to change * @param dns_num the number of the DNS server * @param dns_server the new DNS server address * * @return 0: set netmask address successfully * -1: set netmask address failed */

 *         -1: set netmask address failed
 */
int netdev_set_dns_server(struct netdev *netdev, uint8_t dns_num, const ip_addr_t *dns_server)
{
    RT_ASSERT(netdev);
    RT_ASSERT(dns_server);

    if (dns_num >= NETDEV_DNS_SERVERS_NUM)
    {
        LOG_E("The number of DNS servers(%d) set exceeds the maximum number(%d).", dns_num + 1, NETDEV_DNS_SERVERS_NUM);
        return -RT_ERROR;
    }

    if (!netdev->ops || !netdev->ops->set_dns_server)
    {
        LOG_E("The network interface device(%s) not support to set DNS server address.", netdev->name);
        return -RT_ERROR;
    }

    /* execute network interface device set DNS server address operations */
    return netdev->ops->set_dns_server(netdev, dns_num, (ip_addr_t *)dns_server);
}

/**
 * This function will set network interface device IP, gateway and netmask address according to device name.