System.IO.BACnet.BacnetEthernetProtocolTransport.Open C# (CSharp) Méthode

        private LibPcapLiveDevice Open()
        {
            var devices = LibPcapLiveDeviceList.Instance.Where(dev => dev.Interface != null);

            if ((deviceName != null) && (deviceName != "")) // specified interface
            {
                try
                {
                    var device = devices.Where(dev => dev.Interface.FriendlyName == deviceName).FirstOrDefault();
                    device.Open(DeviceMode.Normal, 1000);  // 1000 ms read timeout
                    return device;
                }
                catch
                {
                    return null;
                }

            }
            else // no interface specified, open the first Ethernet link layer (included Wifi).
            {
                foreach (var device in devices)
                {
                    device.Open(DeviceMode.Normal, 1000);  // 1000 ms read timeout
                    if (device.LinkType == PacketDotNet.LinkLayers.Ethernet
                        && device.Interface.MacAddress != null)
                        return device;
                    device.Close();
                }

                return null;
            }
        }