+check_red_has_carrier_and_ip() {
+ # Interface configured ?
+ [ ! -e "/var/ipfire/red/iface" ] && return 0;
+
+ # Interface present ?
+ [ ! -e "/sys/class/net/$(</var/ipfire/red/iface)" ] && return 0;
+
+ # has carrier ?
+ [ ! "$(</sys/class/net/$(</var/ipfire/red/iface)/carrier)" = "1" ] && return 0;
+
+ # has ip ?
+ [ "$(ip address show dev $(</var/ipfire/red/iface) | grep "inet")" = "" ] && return 0;
+
+ return 1;
+}
+