Lua udp server

local udp = socket.udp()
udp:setsockname('127.0.0.1', 5000)
udp:settimeout(0.001)
local char, ip, port
timer.performWithDelay(200, function ()
        char, ip, port = udp:receivefrom()
        if char then
            local scene = storyboard.getScene(storyboard.getCurrentSceneName())
            if type(scene.keyboardPressed) == 'function' then
                scene:keyboardPressed(char)
            end
        end
    end, 0)