private void RxReset()
{
_nodeIdWaitResponded = 0;
_srcNodeId = 0;
_reassemblingData = null;
_rxTimerAction = null;
}
protected override CustomDataFrame SubstituteIncomingInternal(CustomDataFrame packet, byte destNodeId, byte srcNodeId, byte[] cmdData, int lenIndex, out ActionBase additionalAction, out ActionBase completeAction)
{
CustomDataFrame ret = packet;
additionalAction = null;
completeAction = null;
if (IsActive)
{
if (cmdData.Length > 1 && cmdData[0] == COMMAND_CLASS_TRANSPORT_SERVICE_V2.ID && ValidateCRC16Checksum(cmdData))
{
byte id = (byte)(cmdData[1] & COMMAND_CLASS_TRANSPORT_SERVICE_V2.COMMAND_FIRST_SEGMENT.ID_MASK);
if (id == (COMMAND_CLASS_TRANSPORT_SERVICE_V2.COMMAND_FIRST_SEGMENT.ID) &&
TransportServiceManagerInfo.TestNeedToIgnoreFirstSegment.CanBeUsed &&
TransportServiceManagerInfo.TestNeedToIgnoreFirstSegment.PullValue().Value
)
{
return(ret);
}
if (id == (COMMAND_CLASS_TRANSPORT_SERVICE_V2.COMMAND_SUBSEQUENT_SEGMENT.ID) &&
TransportServiceManagerInfo.TestNeedToIgnoreSubsequentSegment.CanBeUsed &&
TransportServiceManagerInfo.TestOffset.CanBeUsed
)
{
var datagramOffset = SegmentsContainer.GetSegmentOffset(cmdData);
var payloadLength = SegmentsContainer.GetSegmentPayloadLength(cmdData);
if (TransportServiceManagerInfo.TestOffset.PullValue(
val =>
{
return(val >= datagramOffset && val <= (datagramOffset + payloadLength));
}) != null &&
TransportServiceManagerInfo.TestNeedToIgnoreSubsequentSegment.PullValue().Value
)
{
return(ret);
}
}
lock (_lockObject)
{
if (_reassemblingData == null || _reassemblingData.SegmentsContainer.IsCompleted)
{
if (id == (COMMAND_CLASS_TRANSPORT_SERVICE_V2.COMMAND_FIRST_SEGMENT.ID))
{
RxReset();
_srcNodeId = srcNodeId;
var cmdHeader = new byte[lenIndex];
Array.Copy(packet.Data, 0, cmdHeader, 0, cmdHeader.Length);
var cmdFooter = new byte[packet.Data.Length - cmdHeader.Length - cmdData.Length - 1];
Array.Copy(packet.Data, lenIndex + packet.Data[lenIndex] + 1, cmdFooter, 0, cmdFooter.Length);
_reassemblingData = new ReassemblingData
{
SegmentsContainer = new SegmentsContainer(cmdData),
CompletedCmdHeader = cmdHeader,
CompletedCmdFooter = cmdFooter
};
if (_reassemblingData.SegmentsContainer.IsCompleted)
{
additionalAction = new SendDataOperation(srcNodeId, CreateSegmentCompletedCmd(), TransportServiceManagerInfo.TxOptions)
{
SubstituteSettings = new SubstituteSettings(SubstituteFlags.DenySecurity, 0)
};
ret = CreateDataFrameOnReassemblingCompleted(packet);
}
else
{
// Start fragment rx timer.
_rxTimerAction = CreateRxTimerAction();
additionalAction = _rxTimerAction;
}
}
else if (id == (COMMAND_CLASS_TRANSPORT_SERVICE_V2.COMMAND_SUBSEQUENT_SEGMENT.ID))
{
if (_reassemblingData != null && _reassemblingData.SegmentsContainer.CheckForLastSegment(cmdData))
{
additionalAction = new SendDataOperation(srcNodeId, CreateSegmentCompletedCmd(), TransportServiceManagerInfo.TxOptions)
{
SubstituteSettings = new SubstituteSettings(SubstituteFlags.DenySecurity, 0)
};
}
else if (srcNodeId != _nodeIdWaitResponded)
{
_nodeIdWaitResponded = srcNodeId;
additionalAction = new SendDataOperation(srcNodeId, CreateSegmentWaitCmd(1), TransportServiceManagerInfo.TxOptions)
{
SubstituteSettings = new SubstituteSettings(SubstituteFlags.DenySecurity, 0)
};
}
}
}
else if (_srcNodeId == srcNodeId && id == (COMMAND_CLASS_TRANSPORT_SERVICE_V2.COMMAND_SUBSEQUENT_SEGMENT.ID))
{
if (_rxTimerAction != null)
{
_rxTimerAction.Actions[0].Token.Reset(FRAGMENT_RX_TIMEOUT); // Reset fragment rx timer.
}
else
{
_rxTimerAction = CreateRxTimerAction();
additionalAction = _rxTimerAction;
}
_reassemblingData.SegmentsContainer.AddSegment(cmdData);
if (_reassemblingData.SegmentsContainer.IsLastSegmentReceived)
{
if (_reassemblingData.SegmentsContainer.IsCompleted)
{
_rxTimerAction.Token.SetCompleted(); // Complete fragment rx timer.
completeAction = _rxTimerAction;
_rxTimerAction = null;
additionalAction = new SendDataOperation(srcNodeId, CreateSegmentCompletedCmd(), TransportServiceManagerInfo.TxOptions)
{
SubstituteSettings = new SubstituteSettings(SubstituteFlags.DenySecurity, 0)
};
ret = CreateDataFrameOnReassemblingCompleted(packet);
}
else
{
ushort missingOffset = _reassemblingData.SegmentsContainer.GetFirstMissingFragmentOffset();
additionalAction = new SendDataOperation(srcNodeId,
CreateSegmentRequestCmd(missingOffset),
TransportServiceManagerInfo.TxOptions)
{
SubstituteSettings = new SubstituteSettings(SubstituteFlags.DenySecurity, 0)
};
}
}
}
else
{
if (srcNodeId != _nodeIdWaitResponded)
{
_nodeIdWaitResponded = srcNodeId;
additionalAction = new SendDataOperation(srcNodeId,
CreateSegmentWaitCmd(_reassemblingData.SegmentsContainer.PendingSegmentsCount),
TransportServiceManagerInfo.TxOptions)
{
SubstituteSettings = new SubstituteSettings(SubstituteFlags.DenySecurity, 0)
};
}
}
}
}
}
return(ret);
}