#!/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 JSON = require("luci.jsonc")

local outputTable = {}
local localHostname = io.input("/proc/sys/kernel/hostname"):read("*line")

for key,value in pairs(JSON.parse(io.stdin:read("*all"))) do
	if value.data and value.data.mac and value.author ~= localHostname then
		local hwaddr = value.data.mac
		local ipaddr = key
		if ipaddr:find(":") then ipaddr = "[" .. ipaddr .. "]" end
		ipaddr = ","..ipaddr

	table.insert(outputTable, hwaddr..ipaddr)
	end
end

local outFile = io.open("/tmp/dhcp.hosts_remote", "w")
outFile:write(table.concat(outputTable,"\n").."\n")
outFile:close()
outFile = nil

os.execute("killall -HUP dnsmasq 2>/dev/null")