Awesome work Victor! Thanks! I'll give it a try. One thing I see mising though (if I understand well) is the allocation of three fd_sets (I posted a comment on github regarding that).
Those fd_sets are currently allocated on stack and the array they contain is determined currently by FD_SETSIZE.
We'll basically need a similar structure that we can allocate dynamically, and cast it to fd_set when passing it to the select call.
I can go ahead and try implement the feedback and test it together with the changes in Victor's PR.