04-06-2009
Thank you for using code tags.
First off, you're using a stream socket, not a datagram(i.e. UDP) socket. UDP sockets let you send to(and receive from) arbitrary destinations and ports at any time without making any connections, with the caveat you can only send packets up to about 1 kilobyte at a time.
Once you've made a datagram socket, you can just send to the IP address INADDR_ANY to broadcast.
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