464xlat: delete SNATed conntracks on interface teardown

Existing conntracks will continue to be SNATed to 192.0.0.1 even after
464xlat interface gets teared down. To prevent this, matching
conntracks must be killed.

Signed-off-by: Alin Nastac <[email protected]>
Signed-off-by: Hans Dedecker <[email protected]> [PKG_RELEASE increase]

package/network/ipv6/464xlat/Makefile

@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=464xlat
-PKG_RELEASE:=12
+PKG_RELEASE:=13
 
 PKG_SOURCE_DATE:=2018-01-16
 PKG_MAINTAINER:=Hans Dedecker <[email protected]>

package/network/ipv6/464xlat/files/464xlat.sh

@@ -98,6 +98,9 @@ proto_464xlat_teardown() {
 		ip -6 rule del from all lookup local
 		ip -6 rule add from all lookup local pref 0
 	fi
+
+	# Kill conntracks SNATed to 192.0.0.1
+	echo 192.0.0.1 > /proc/net/nf_conntrack
 }
 
 proto_464xlat_init_config() {