map: delete map-t device when tearing down map interface

Delete the map-t device when tearing down the map-t interface; as such
there's no conflict when the map-t interface comes up again when trying
to add the map-t device as the map-t device was still present
(Can not add: device 'map-wan6_4' already exists!).

Only call ifdown in teardown for map-e and lw6o4 map interfaces types
in order to suppress the trace "wan6_4 (6652): Interface wan6_4_ not found"

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

package/network/ipv6/map/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=map
 PKG_VERSION:=4
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 PKG_LICENSE:=GPL-2.0
 
 include $(INCLUDE_DIR)/package.mk

package/network/ipv6/map/files/map.sh

@@ -192,7 +192,17 @@ proto_map_setup() {
 
 proto_map_teardown() {
 	local cfg="$1"
-	ifdown "${cfg}_"
+	local link="map-$cfg"
+
+	json_get_var type type
+
+	[ -z "$type" ] && type="map-e"
+
+	case "$type" in
+		"map-e"|"lw4o6") ifdown "${cfg}_" ;;
+		"map-t") [ -f "/proc/net/nat46/control" ] && echo del $link > /proc/net/nat46/control ;;
+	esac
+
 	rm -f /tmp/map-$cfg.rules
 }