Receiving UDP broadcast

Question

I have to receive an UDP broadcast (in Ubuntu if that makes any difference). Using Wireshark, I can see the packet being sent from the server machine, and I can see it being rec

Answer 1

To send and receive broadcast

1. Be sure that netmask is correct. in windows mask for broadcast packets does not matters, but not in linux.

2. bind socket to INADDR_ANY

3. setsockopt to BROADCAST

4. call sendto with sendaddr.sin_addr.s_addr = inet_addr("your_interface_broadcast_address"). or - call sento several times for each interface with its broadcast ip address.

5. call recvfrom. any time before calling recvfrom, set up length parameter.