SIOCGIFINDEX
if (ioctl(fd, SIOCGIFINDEX, (void *) &ifr) < 0) {
#define SIOGIFINDEX SIOCGIFINDEX /* misprint compatibility :-) */
case SIOCGIFINDEX:
case SIOCGIFINDEX:
case SIOCGIFINDEX:
ret = ioctl(s, SIOCGIFINDEX, &ifr);
rc = ioctl(sd, SIOCGIFINDEX, (char *)&ifdata);
assert(ioctl(dev->sock, SIOCGIFINDEX, &ifr) >= 0);