How to multicast using gen_udp in Erlang?

Question

How do you use gen_udp in Erlang to do multicasting? I know its in the code, there is just no documentation behind it. Sending out data is obvious and simple. I

Answer 1

Multicast is specified by IP Address

It's the same in erlang as for all languages. The IP addresses 224.0.0.0 through 239.255.255.255 are multicast addresses.

Pick an address in that range, check that you're not overlapping an already assigned address, and you are good to go.

http://www.iana.org/assignments/multicast-addresses