An attempt was made to access a socket in a way forbidden by its access permissions. Why?

Question

private void StartReceivingData(string ipAddress, int iPort)
{
    try
    {
        if (!_bContinueReciving)
        {
            //initializeMainSocket(ipAddress, iPort);
            _mSocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);//<------HERE IS RAISED THE EXCEPTION
            _mSocket.Bind(new IPEndPoint(IPAddress.Parse(ipAddress), iPort));
            //  _mSocket.Bind(new IPEndPoint(IPAddress.Loopback, iPort));
            _mSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, true);
            _mSocket.IOControl(IOControlCode.ReceiveAll, new byte[4] { 1, 0, 0, 0 }, new byte[4] { 0, 0, 0, 0 });
            //var 1
            _mSocket.BeginReceive(_buffReceivedData, 0, _buffReceivedData.Length, SocketFlags.None,
                                 new AsyncCallback(OnReceive), null);
            initializeLocalSocket();
        }
        else
        {
            _bContinueReciving = false;
            _mSocket.Close();
        }
    }
    catch (Exception exception)
    {
        Debug.WriteLine(exception);
    }
}

I'm getting an error when trying to start my program:

An attempt was made to access a socket in a way forbidden by its access permissions.

I don't understand why... it worked fine, and now it doesn't.

I am streaming with VLC, and I want to receive the packets, do some reports, and then restream local to a player.

Answer 1

Most likely the socket is held by some process. Use netstat -o to find which one.