[Mono-winforms-list] No UDP broadcast messages received

sharkal wolfgang.ginner at kapsch.net
Tue Nov 29 08:40:50 EST 2011

i want to listen to a specific UDP port and receiving all messages, which
are sent on that port.
I only receive messages, which are sent directly to my IP address, but do
not receive messages, which are sent broadcast.
My openSuse is receiving the messages for sure, since i checked it with
wireshark,  turned off the firewall and also can receive the messages, if i
do the same with python.
In Windows i can receive also the broadcast messages.
Any idea, how to deal with it?

The socket is configured something like this:

Socket clientSocket = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
clientSocket.ReceiveBufferSize = 2 * 1024 * 1024; 
clientSocket.BeginReceiveFrom(receivebuffer, 0, receivebuffer.Length,
                    SocketFlags.None, ref localEndPoint, OnReceiveCallback,

SocketOptionName.Broadcast, 1);
clientSocket.EnableBroadcast = true;
remoteIpAddress = IPAddress.Broadcast;
remoteEndPoint = new IPEndPoint(remoteIpAddress, ADMIN_PORT);
clientSocket.SendTo(sendbuffer, sendbuffer.Length, SocketFlags.None,

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