/// <summary>
/// Processes a received complex ack
/// </summary>
/// <param name="source">The address of the device that sent the ack</param>
/// <param name="message">The complex ack header</param>
/// <param name="segment">The buffer segment containing the ack content</param>
public void ProcessComplexAck(Address source, ComplexAckMessage message, BufferSegment segment)
{
ClientTransaction tx = null;
lock (_lock)
{
tx = _getClientTransaction(source, message.InvokeId);
}
if(tx != null)
tx.OnComplexAck(message, segment);
}
/// <summary> /// Notifies the handle that a new response segment /// is available /// </summary> /// <param name="message">The complex ack message</param> /// <param name="segment">The response segment</param> public abstract void FeedComplexAck(ComplexAckMessage message, BufferSegment segment);
/// <summary>
/// Notifies the handle that a new response segment
/// is available
/// </summary>
/// <param name="message">The complex ack message</param>
/// <param name="segment">The response segment</param>
public override void FeedComplexAck(ComplexAckMessage message, BufferSegment segment)
{
_source.SetException(new AbortException(AbortReason.InvalidApduInThisState));
}
/// <summary>
/// Called whenever a complex ack is received
/// for this transaction
/// </summary>
/// <param name="message">The received message</param>
/// <param name="segment">The segment</param>
public void OnComplexAck(ComplexAckMessage message, BufferSegment segment)
{
lock(_lock)
{
bool dispose = false;
if (_state == ClientState.AwaitConfirmation)
{
if(!message.Segmented)
{
_handle.FeedComplexAck(message, segment);
dispose = true;
}
else if(message.SequenceNumber == 0)
{
_sequenceNumber = 1;
_windowSize = message.ProposedWindowSize;
_sendSegmentAck();
_handle.FeedComplexAck(message, segment);
_transitionTo(ClientState.SegmentedConfirmation);
}
else
{
_sendAbort(AbortReason.InvalidApduInThisState);
_handle.FeedAbort(AbortReason.InvalidApduInThisState);
dispose = true;
}
}
else if(_state == ClientState.SegmentedConfirmation)
{
int sequenceNumber;
if ((sequenceNumber = _inWindow(message.SequenceNumber)) != -1
&& sequenceNumber == _sequenceNumber)
{
_handle.FeedComplexAck(message, segment);
_windowSize = message.ProposedWindowSize;
_sequenceNumber++;
dispose = !message.MoreFollows;
if (dispose || _sequenceNumber == _windowStart + _windowSize)
_sendSegmentAck();
else if (!dispose)
_transitionTo(ClientState.SegmentedConfirmation);
}
else
{
_sendSegmentAck(nack:true);
_transitionTo(ClientState.SegmentedConfirmation);
}
}
if(dispose)
_transitionTo(ClientState.Disposed);
}
}