#!/usr/bin/lua

--! LibreMesh
--! Copyright (C) 2019  Gioacchino Mazzurco <gio@altermundi.net>
--!
--! This program is free software: you can redistribute it and/or modify
--! it under the terms of the GNU Affero General Public License as
--! published by the Free Software Foundation, either version 3 of the
--! License, or (at your option) any later version.
--!
--! This program is distributed in the hope that it will be useful,
--! but WITHOUT ANY WARRANTY; without even the implied warranty of
--! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--! GNU Affero General Public License for more details.
--!
--! You should have received a copy of the GNU Affero General Public License
--! along with this program.  If not, see <http://www.gnu.org/licenses/>.

local fs = require("nixio.fs")
local JSON = require("luci.jsonc")

local ifacesPath = "/sys/class/net/"
local hostname = io.input("/proc/sys/kernel/hostname"):read("*line")

local batHostTable = {}

local ignoredIf = { lo=true, anygw=true }

for ifname in fs.dir(ifacesPath) do
	if not ignoredIf[ifname] then
		local macaddr = io.input(ifacesPath..ifname.."/address"):read("*line")
		if type(macaddr) == "string" and macaddr:len() == 17 then
			batHostTable[macaddr] = string.gsub(hostname.."_"..ifname, "%W", "_")
		end
	end
end

io.popen("shared-state insert bat-hosts", "w"):write(JSON.stringify(batHostTable))