How to get beacons.

See more:

C#

I have some devices that send a standard beacon and then a user data(38 bytes). So to get it I set a socket. I'm programming in C#.

private void buttonStart_Click(object sender, EventArgs e)
    {
        if (comboBoxInterfaces.SelectedIndex == -1)
        {
            MessageBox.Show("Select an Interface to capture the   packets.", "WIFI Sniffer",
               MessageBoxButtons.OK, MessageBoxIcon.Error);
            return;
        }

        try
        {
            if (!continue_capturing)
            {
                //Start capturing the packets...

                buttonStart.Text = "&Stop";

                continue_capturing = true;

                //For sniffing the socket to capture the packets has to be a raw socket, with the
                //address family being of type internetwork, and protocol being IP
                mainSocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);

                //Bind the socket to the selected IP address
                mainSocket.Bind(new IPEndPoint(IPAddress.Parse(comboBoxInterfaces.SelectedItem.ToString()), 0));

                //Set the socket  options
                mainSocket.SetSocketOption(SocketOptionLevel.IP,            //Applies only to IP packets
                                           SocketOptionName.HeaderIncluded, //Set the include the header
                                           true);                           //option to true

                byte[] byTrue = new byte[4] { 1, 0, 0, 0 };
                byte[] byOut = new byte[4] { 1, 0, 0, 0 }; //Capture outgoing packets

                //Socket.IOControl is analogous to the WSAIoctl method of Winsock 2
                mainSocket.IOControl(IOControlCode.ReceiveAll,              //Equivalent to SIO_RCVALL constant
                    //of Winsock 2
                                     byTrue,
                                     byOut);

                //Start receiving the packets asynchronously
                mainSocket.BeginReceive(byte_data, 0, byte_data.Length, SocketFlags.None,
                    new AsyncCallback(OnReceive), null);
            }
            else
            {
                buttonStart.Text = "&Start";
                continue_capturing = false;
                //To stop capturing the packets close the socket
                mainSocket.Close();
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "WIFI Sniffer", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

When I parse received packets I see only TCP, UDP packets also socket type - SocketType.Raw. How can I get beacons? May be I should configure it differently?