UNIX for Advanced & Expert Users

I have a requirement to wait for broadcast as well as unicast request.
i have a infinite while loop , that has logic for handing udp requests (recv_from)
it blocks on recvfrom for request , once it get request it has to process the request and again blocks for another request if the request is a broadcast.
if it receive a uni-cast request , it has to process it and comes out of while loop.
code looks like

Code:

while(1)
{
recvfrom();
if unicast
break;
if broadcast
process and continue;
}

i was able to wait for broadcast alone or unicast alone
but i failed to wait on a single socket for both requests
is there any way to do that ????