#!/usr/bin/lua

local sysconfig = require 'gluon.sysconfig'
local gluon_util = require 'gluon.util'
local platform = require 'gluon.platform'

local fs = require 'luci.fs'
local uci = require('luci.model.uci').cursor()
local util = require 'luci.util'


if platform.match('ar71xx', 'generic', {'tl-wdr3600', 'tl-wdr4300'}) then
   sysconfig.primary_mac = util.trim(fs.readfile('/sys/class/ieee80211/phy1/macaddress'))
else
   sysconfig.primary_mac = util.trim(fs.readfile('/sys/class/ieee80211/phy0/macaddress'))
end


local function iface_exists(name)
   return (gluon_util.exec('ip', 'link', 'show', 'dev', (name:gsub('%..*$', ''))) == 0)
end


local lan_ifname = uci:get('network', 'lan', 'ifname')
local wan_ifname = uci:get('network', 'wan', 'ifname')


if platform.match('ar71xx', 'generic', {'nanostation-m', 'cpe510'}) then
   lan_ifname, wan_ifname = wan_ifname, lan_ifname
end


if wan_ifname and iface_exists(wan_ifname) then
   sysconfig.wan_ifname = wan_ifname
   sysconfig.lan_ifname = lan_ifname
else
   sysconfig.wan_ifname = lan_ifname
end