kifioctl
if (rc = kifioctl(tiptr, SIOCSLIFADDR, &sbuf, ifname)) {
if (rc = kifioctl(tiptr, SIOCSLIFBRDADDR, &sbuf,
if (rc = kifioctl(tiptr, SIOCADDRT, &sbuf, ifname)) {
if (rc = kifioctl(tiptr, SIOCSLIFNETMASK, &sbuf, ifname)) {
kifioctl(TIUSER *tiptr, int cmd, struct netbuf *nbuf, char *ifname);