firewall: rework interface address determination to skip ipv6 addresses

SVN-Revision: 31755

package/firewall/files/reflection.hotplug

@@ -9,24 +9,34 @@ find_iface_address()
 	local ipaddr="$2"
 	local prefix="$3"
 
+	local idx=1
 	local tmp="$(ubus call network.interface."$iface" status 2>/dev/null)"
 
 	json_load "${tmp:-{}}"
 	json_get_type tmp address
 
 	if [ "$tmp" = array ]; then
-
 		json_select address
-		json_get_type tmp 1
 
-		if [ "$tmp" = object ]; then
+		while true; do
+			json_get_type tmp $idx
+			[ "$tmp" = object ] || break
 
-			json_select 1
-			[ -n "$ipaddr" ] && json_get_var "$ipaddr" address
-			[ -n "$prefix" ] && json_get_var "$prefix" mask
+			json_select $((idx++))
+			json_get_var tmp address
 
+			case "$tmp" in
+				*:*) json_select .. ;;
+				*)
+					[ -n "$ipaddr" ] && json_get_var $ipaddr address
+					[ -n "$prefix" ] && json_get_var $prefix mask
+					return 0 
+				;;
+			esac
+		done
 	fi
-	fi
+
+	return 1
 }
 
 if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then