Emul8.HostInterfaces.Network.LinuxTapInterface.Init C# (CSharp) Method

        private void Init()
        {
            active = false;
            // if there is no /dev/net/tun, run in a "dummy" mode
            if(!File.Exists("/dev/net/tun"))
            {
                this.Log(LogLevel.Warning, "No TUN device found, running in dummy mode.");
                return;
            }

            IntPtr devName;
            if(deviceName != "")
            {
                // non-anonymous mapping
                devName = Marshal.StringToHGlobalAnsi(deviceName);
            }
            else
            {
                devName = Marshal.AllocHGlobal(DeviceNameBufferSize);
                Marshal.WriteByte(devName, 0); // null termination
            }
            try
            {
                tapFileDescriptor = LibC.OpenTAP(devName, persistent);
                if(tapFileDescriptor < 0)
                {
                    var process = new Process();
                    var output = string.Empty;
                    process.StartInfo.FileName = "mono";
                    process.StartInfo.Arguments = string.Format("{0} {1} true", DynamicModuleSpawner.GetTAPHelper(), deviceName);

                    try
                    {
                        SudoTools.EnsureSudoProcess(process, "TAP creator");
                    }
                    catch(Exception ex)
                    {
                        throw new RecoverableException("Process elevation failed: " + ex.Message);
                    }

                    process.EnableRaisingEvents = true;
                    process.StartInfo.CreateNoWindow = false;
                    process.StartInfo.UseShellExecute = false;
                    process.StartInfo.RedirectStandardError = true;
                    process.StartInfo.RedirectStandardOutput = true;

                    var started = process.Start();
                    if(started)
                    {
                        output = process.StandardError.ReadToEnd();
                        process.WaitForExit();
                    }
                    if(!started || process.ExitCode != 0)
                    {
                        this.Log(LogLevel.Warning, "Could not create TUN/TAP interface, running in dummy mode.");
                        this.Log(LogLevel.Debug, "Error {0} while opening tun device '{1}': {2}", process.ExitCode, deviceName, output);
                        return;
                    }
                    Init();
                    return;
                }
                stream = new UnixStream(tapFileDescriptor, true);
                InterfaceName = Marshal.PtrToStringAnsi(devName);
                this.Log(LogLevel.Info,
                    "Opened interface {0}.", InterfaceName);
            }
            finally
            {
                Marshal.FreeHGlobal(devName);
            }
            active = true;
        }