Add package gluon-radv-filterd

This package drops all incoming router advertisements except for the
default router with the best metric according to B.A.T.M.A.N. advanced.

Note that advertisements originating from the node itself (for example
via gluon-radvd) are not affected.

package/gluon-radv-filterd/Makefile

@@ -0,0 +1,41 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gluon-radv-filterd
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/gluon-radv-filterd
+  SECTION:=gluon
+  CATEGORY:=Gluon
+  TITLE:=Filter IPv6 router advertisements
+  DEPENDS:=+gluon-ebtables
+endef
+
+define Package/gluon-radv-filterd/description
+	Gluon community wifi mesh firmware framework: filter IPv6 router advertisements
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+	$(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+	CFLAGS="$(TARGET_CFLAGS)" CPPFLAGS="$(TARGET_CPPFLAGS)" $(MAKE) -C $(PKG_BUILD_DIR) $(TARGET_CONFIGURE_OPTS)
+endef
+
+define Package/gluon-radv-filterd/install
+	$(CP) ./files/* $(1)/
+
+	$(INSTALL_DIR) $(1)/usr/sbin/
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/gluon-radv-filterd $(1)/usr/sbin/
+endef
+
+$(eval $(call BuildPackage,gluon-radv-filterd))

package/gluon-radv-filterd/README.md

@@ -0,0 +1,7 @@
+gluon-radv-filterd
+==================
+This package drops all incoming router advertisements except for the 
+default router with the best metric according to B.A.T.M.A.N. advanced.
+
+Note that advertisements originating from the node itself (for example
+via gluon-radvd) are not affected.

package/gluon-radv-filterd/files/etc/init.d/gluon-radv-filterd

@@ -0,0 +1,17 @@
+#!/bin/sh /etc/rc.common
+
+START=50
+
+SERVICE_WRITE_PID=1
+SERVICE_DAEMONIZE=1
+
+DAEMON=/usr/sbin/gluon-radv-filterd
+
+
+start() {
+    service_start $DAEMON
+}
+
+stop() {
+    service_stop $DAEMON
+}

package/gluon-radv-filterd/files/lib/gluon/ebtables/400-radv-filterd

@@ -0,0 +1,3 @@
+chain('RADV_FILTER', 'DROP')
+rule 'FORWARD -p IPv6 -i bat0 --ip6-protocol ipv6-icmp --ip6-icmp-type router-advertisement -j RADV_FILTER'
+rule 'RADV_FILTER -j ACCEPT'

package/gluon-radv-filterd/src/Makefile

@@ -0,0 +1,4 @@
+all: gluon-radv-filterd
+
+gluon-radv-filterd: gluon-radv-filterd.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -Wall -o $@ $^ $(LDLIBS)