netif_open
netdev_sock = netif_open(devname);
if ((tftpdev_sock = netif_open("efinet")) < 0) {
if ((tftpdev_sock = netif_open("efinet")) < 0) {
netdev_sock = netif_open(devname);
if ((netdev_sock = netif_open(op)) < 0) {
if ((tftpdev_sock = netif_open("efinet")) < 0) {
if ((netdev_sock = netif_open(op)) < 0) {
int netif_open(void *);