[lwip-users] lwip_select never returns value > 0

[pekez]

Hi people,

I am trying to use lwip_select in combination with lwip_recv. I have 
done it like this so far:
FD_ZERO(&rfds);
FD_SET(new_sd, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 200000;

if (lwip_select(new_sd + 1, &rfds, NULL, NULL, &tv) > 0)
{
    lwip_recv()

}

No matter what, timeout always exceeds. Am I doing anything wrong? 
Should I include some lwip option in order to use lwip_select()?
I am using lwip v1.4.1.

Regards,
Nenad