Socket ReceiveAll

Question

I am trying to capture ip packets in c#. Everything is working fine, except that i only get outgoing packets.

My Code:

using (Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP))
{
    sock.Bind(new IPEndPoint(MYADDRESS, 0));
    sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, true);
    sock.IOControl(IOControlCode.ReceiveAll, BitConverter.GetBytes(1), null);

    while (true)
    {
        byte[] buffer = new byte[sock.ReceiveBufferSize];
        int count = sock.Receive(buffer);

        // ...
    }
}

The problem is definitely my pc! But maybe there is a workaround ...

Answer 1

It is likely that that the Windows firewall is blocking incoming packets. Add your program to the firewall exclusions.