#45 PcapDevice.MacAddress throws NullReferenceException

[Diamondo25]

On some machines, the property MacAddress from PcapDevice throws a NullReferenceException.
This is the code I use:

    public void SetUp()
    {
        var devices = CaptureDeviceList.Instance;
        // Sniff all devices
        foreach (var device in devices)
        {
            device.Open(DeviceMode.Promiscuous);
            device.Filter = "tcp portrange 8383-9000";
            Logger.WriteLine("[DEBUG] Set filter for {0}", device.Description);
            device.OnPacketArrival += device_OnPacketArrival;
            device.StartCapture();
            _devices.Add(device);

            if (device.LinkType != LinkLayers.Ethernet)
            {
                Logger.WriteLine("Skipped sniffing {0} ({1})", device.Description, device.MacAddress);
                StopCapture(device);
            }
            else
            {
                Logger.WriteLine("Started sniffing {0} ({1})", device.Description, device.MacAddress);
            }
        }
    }

I have no idea what triggers this, but I think I'll add a throw ... catch block for now.

[TJ Tunnell]

One reason I found for this happening is if you have a virtual Ethernet adapter enabled such as the one that comes with Hyper-V. I disabled my virtual adapter and the problem ceased.