gluon-mesh-vpn-tunneldigger: add package for tunneldigger L2TP support

package/gluon-mesh-vpn-tunneldigger/Makefile

+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gluon-mesh-vpn-tunneldigger
+PKG_VERSION:=3
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include ../gluon.mk
+
+define Package/gluon-mesh-vpn-tunneldigger
+  SECTION:=gluon
+  CATEGORY:=Gluon
+  TITLE:=Support for connecting meshes via tunneltigger/L2TPv3 pseudowire
+  DEPENDS:=+gluon-core +gluon-mesh-vpn-core +tunneldigger
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+	$(call GluonSrcDiet,./luasrc,$(PKG_BUILD_DIR)/luadest/)
+endef
+
+define Package/gluon-mesh-vpn-tunneldigger/install
+	$(CP) ./files/* $(1)/
+	$(CP) $(PKG_BUILD_DIR)/luadest/* $(1)/
+endef
+
+define Package/gluon-mesh-vpn-tunneldigger/postinst
+#!/bin/sh
+$(call GluonCheckSite,check_site.lua)
+endef
+
+$(eval $(call BuildPackage,gluon-mesh-vpn-tunneldigger))

package/gluon-mesh-vpn-tunneldigger/check_site.lua

+need_string_array('mesh_vpn.tunneldigger.brokers')

package/gluon-mesh-vpn-tunneldigger/luasrc/lib/gluon/upgrade/400-mesh-vpn-tunneldigger

+#!/usr/bin/lua
+
+local site = require 'gluon.site_config'
+local util = require 'gluon.util'
+
+local uci = require('simple-uci').cursor()
+
+
+local enabled = uci:get('tunneldigger', 'mesh_vpn', 'enabled')
+if enabled == nil then
+	enabled = uci:get_first('tunneldigger', 'broker', 'enabled')
+end
+if enabled == nil then
+	enabled = site.mesh_vpn.enabled or false
+end
+
+-- Delete old broker config section
+if not uci:get('tunneldigger', 'mesh_vpn') then
+	uci:delete_all('tunneldigger', 'broker')
+end
+
+uci:section('tunneldigger', 'broker', 'mesh_vpn', {
+	enabled = enabled,
+	uuid = util.node_id(),
+	interface = 'mesh-vpn',
+	bind_interface = 'br-wan',
+	group = 'gluon-mesh-vpn',
+	broker_selection = 'usage',
+	address = site.mesh_vpn.tunneldigger.brokers,
+})
+
+uci:save('tunneldigger')