#!/usr/bin/lua

local site = require 'gluon.site_config'

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


local function configure_mtu(radio, config, mtu)
  if config.ibss then
    local network = 'ibss_' .. radio

    if config.ibss.vlan then
      uci:set('network', network, 'mtu', mtu + 4)
      uci:set('network', network .. '_vlan', 'mtu', mtu)
    else
      uci:set('network', network, 'mtu', mtu)
    end
  end

  if config.mesh then
    uci:set('network', 'mesh_' .. radio, 'mtu', mtu)
  end
end


local radios = {}

uci:foreach('wireless', 'wifi-device',
	    function(s)
	      table.insert(radios, s['.name'])
	    end
)

local mtu = 1532

for _, radio in ipairs(radios) do
	local hwmode = uci:get('wireless', radio, 'hwmode')

	if hwmode == '11g' or hwmode == '11ng' then
	  configure_mtu(radio, site.wifi24, mtu)
	elseif hwmode == '11a' or hwmode == '11na' then
	  configure_mtu(radio, site.wifi5, mtu)
	end
end


uci:save('network')