Socket tips: Allow socket to send UDP Broadcast

If you create a UDP Socket:

SocketHandle = socket (serverAddr-> ai_family, serverAddr-> ai_socktype, serverAddr-> ai_protocol );

If you use it to send Broadcast now, errors will occur. This is not allowed by the Socket API. So how can we make it support broadcast? You need to continue to make some settings:

Int broadcastPermission = 1; setsockopt (socketHandle, SOL_SOCKET, SO_BROADCAST, (void *) & broadcastPermission, sizeof (broadcastPermission ));

For a complete UDP broadcast example, see Socket tips: UDP Echo service-Client code.