ffmuc-ipv6-ra-filter: add readme and title

ffmuc-ipv6-ra-filter/Makefile

@@ -7,7 +7,7 @@ PKG_RELEASE:=1
 include $(TOPDIR)/../package/gluon.mk
 
 define Package/$(PKG_NAME)
-  TITLE:=Filters RAs
+  TITLE:=Filters router advertisments of any gateway but the connected gateway
   DEPENDS:=+gluon-ebtables +libgluonutil +libbatadv
 endef
 

ffmuc-ipv6-ra-filter/README.md

@@ -0,0 +1,13 @@
+# ffmuc-ipv6-ra-filter
+
+The package disables forwarding router advertisements on `bat0` which were sent from a different source than the connected gateway. This is based on the output of `batctl gwl` and sets the IPv6 gateway to the IPv4 gateway.
+
+It makes sure that clients only learn the IPv6 gateway of the gateway it is connected to and does not receive other router advertisements in the mesh.
+
+### Credits
+
+This is based on the FFMUC package [ffmuc-simple-radv-filter](https://github.com/freifunkMUC/gluon-packages/tree/7c2e1224c0cfc1e66f93738aefbcd401bfb11f2c/ffmuc-simple-radv-filter).
+
+### Contact
+
+Feel free to ask questions in the [FFMUC chat](https://chat.ffmuc.net).