iface_conf_cmp
} else if (iface_conf_cmp(iface_conf, oiface_conf) != 0) {
int iface_conf_cmp(struct iface_conf *, struct iface_conf *);
int iface_conf_cmp(struct iface_conf *, struct iface_conf *);
} else if (iface_conf_cmp(iface_conf, oiface_conf) != 0) {