#define MAX_BROADCAST_MSG_LEN 1472

int  openBroadcastSocket ( /* void */ );
void closeBroadcastSocket( /* sendSocket */ );
int  sendBroadcastMessage( /* sendSocket, sendPort, sndMsg, sndMsgLen */ );

int  openReceiveSocket   ( /* port */ );
int  readReceiveSocket   ( /* recvSocket, buff, len */ );
int  selectReceiveSocket ( /* recvSocket, usec */ );