use Socket;

socket (S,PF_INET,SOCK_RAW,getprotobyname('icmp')) or die "socket: $!\n";

setsockopt (S, SOL_SOCKET, SO_BROADCAST,1) or die "setsocket: $!\n";

$magic = '17';

defined(send(S,$magic,0,sockaddr_in(0x2ffff,INADDR_BROADCAST)))
 or print "send: $!\n";

close (S);