Exemplo n.º 1
0
 public static extern int SCardGetStatusChange(IntPtr hContext,
                                               int value_Timeout,
                                               ref SCARD_READERSTATE ReaderState,
                                               uint ReaderCount);
Exemplo n.º 2
0
 public static extern int SCardGetStatusChange(IntPtr hContext,
 int value_Timeout,
 ref SCARD_READERSTATE ReaderState,
 uint ReaderCount);
Exemplo n.º 3
0
        private async Task CardDetectionLoop(CancellationToken token)
        {

            await Task.Delay(1, token)
                      .ConfigureAwait(false); // resume on threadpool thread

            while (!token.IsCancellationRequested)
            {
                try
                {
                    var currentState = new SCARD_READERSTATE
                    {
                        RdrName = Name,
                        RdrCurrState = Constants.SCARD_STATE_UNAWARE,
                        RdrEventState = 0

                    };
                    const int readerCount = 1;
                    const int timeout = 0;

                    var retval = SafeNativeMethods.SCardGetStatusChange(hContext, timeout, ref currentState, readerCount);

                    if (retval == 0 && currentState.ATRLength > 0)
                    {
                        // Card inserted
                        if (!cardInserted)
                        {
                            cardInserted = true;

                            OnDisconnect(); // clean up if needed


                            var card = new SmartCard(hContext, Name, currentState.ATRValue);
                            if (Interlocked.CompareExchange(ref currentCard, card, null) == null)
                            {
                                // card was not inserted, now it is
                                // Raise on another thread to not block this loop
                                var evt = CardAdded;
                                if (evt != null)
                                {
                                    Task.Run(() => evt(this, new CardAddedEventArgs(card)));
                                }
                            }
                        }
                    }
                    else
                    {
                        // Card removed
                        if (cardInserted)
                        {
                            cardInserted = false;

                            // HACK: Let our tranceive method know it's gone for one buggy reader
            
                            // bug in the 5427 CK reader
                            if (Name.Contains("5427 CK"))
                            {
                                SmartCardConnectionExtension.IsFirstConnection = false;
                            }

                            OnDisconnect();
                        }
                    }

                    await Task.Delay(250, token);
                }
                catch (Exception ex)
                {
                    Debug.WriteLine("Exception from card monitor thread: " + ex);
                }
            }
        }