Thread: need technical help regarding multicasting

Hi Gurus,
This is my first thread here.

I m developing p2p multicasting subtrate which is intended to multicast a query string and wait for a response from its groups nodes.

here i need to wait for some time (eg 5 seconds ) for a response after i multicast the message and print the response. how can i implement this? i know this is simple but as im new to C i hv no idea how to do this.

here is my code fragment

Code:

 
  // some code here
    if(fork())
    {
            while(1){
              new_mcast_recieve( host ,port );
              // todo here how can i wait for 5 seconds for a response. if not exit from the loop
           }
    }
   mcast_send(mc , query , sizeof(query));      

  //.some code here

if you hv a better structure about how to implemet this please sugest me.

thanks you.