LIFC_ENABLED
ret = getallifs(sock4, af, &buf, &numifs, (flags & ~LIFC_ENABLED));
if ((flags & LIFC_ENABLED) && !(lifrl.lifr_flags & IFF_UP))
err = getallifaddrs(AF_UNSPEC, ifap, LIFC_ENABLED);
err = getallifaddrs(AF_INET, ifap, LIFC_ENABLED);
LIFC_ENABLED);