private void HandleFragmentationMessageTerminated(object sender, FragmentationMessageTerminatedEventArgs args)
{
if (sender is InboundFragmentationMessage)
{
if ((args.FinalState != FragmentationMessageState.Final) || (args.FinalStatus != Status.Success))
{
// do nothing.
return;
}
InboundFragmentationMessage inMsg = sender as InboundFragmentationMessage;
Frame receivedMessage = inMsg.RetrieveData();
if (receivedMessage != null)
{
DataIndicationHandler handler = _dataIndicationHandler;
if (handler != null)
{
handler.Invoke(this, inMsg.Source, inMsg.Destination, receivedMessage);
}
else
{
Frame.Release(ref receivedMessage);
}
}
}
else if (sender is OutboundFragmentationMessage)
{
OutboundFragmentationMessage outMsg, newOutMsg;
lock (_lock)
{
outMsg = sender as OutboundFragmentationMessage;
ushort previousDestination = outMsg.Destination;
_transmissionCharacteristicStorage.UpdateTransmissionCharacteristic(outMsg.Destination, outMsg.TimeoutForResending,
outMsg.MaxFragmentsBeforeAck);
// remove active message from repository
_outboundAssociations.RemoveFragmentationMessage(outMsg);
// try to start new message (if possible)
DataRequestItem newItem;
newOutMsg = null;
if (_dataRequestQueueSet.Dequeue(previousDestination, out newItem))
{
newOutMsg = CreateNewOutboundMessage(newItem);
}
}
// after releasing the lock, call method in FragmentationMessage class.
outMsg.NotifySender(args.FinalState, args.FinalStatus);
outMsg.Dispose();
if (newOutMsg != null)
{
newOutMsg.SendNextDataFragment(true);
}
}
}
public void HandleDataIndication6Low(UInt16 origAddr, UInt16 targetAddr, ref Frame sdu)
{
DataIndicationHandler ind = _dataIndicationHandler6Low;
if (ind != null)
{
ind.Invoke(this, origAddr, targetAddr, sdu);
sdu = null;
}
}
public void HandleDataIndication(UInt16 origAddr, UInt16 targetAddr, ref Frame sdu)
{
#if USE_FRAG
_frag.HandleLowerLayerDataIndication(this, origAddr, targetAddr, sdu);
sdu = null;
#else
DataIndicationHandler ind = _dataIndicationHandler;
if (ind != null)
{
ind.Invoke(this, origAddr, targetAddr, sdu);
sdu = null;
}
#endif
}
public void DataRequest(ushort targetShortAddr, ref Frame sdu, byte sduHandle, DataConfirmHandler handler)
{
if (!_started)
{
if (handler != null)
{
handler.Invoke(this, sduHandle, Status.NotRunning);
}
return;
}
if (targetShortAddr == _localShortAddress)
{
// deliver frame to ourself
if (handler != null)
{
handler.Invoke(this, sduHandle, Status.Success);
}
DataIndicationHandler ind = _dataIndicationHandler;
if (ind != null)
{
ind.Invoke(this, targetShortAddr, targetShortAddr, sdu);
sdu = null;
}
return;
}
DataRequestItem newItem = new DataRequestItem(targetShortAddr, ref sdu, sduHandle, handler);
OutboundFragmentationMessage outMsg = null;
bool queueFull = false;
lock (_lock)
{
// check if one can send directly the message.
if (null == _outboundAssociations.GetFragmentationMessage(_localShortAddress, targetShortAddr))
{
outMsg = CreateNewOutboundMessage(newItem);
}
else
{
// there is already a message being sent to this address. Store to queue.
if (!_dataRequestQueueSet.Add(newItem))
{
queueFull = true;
}
}
}
// release the lock before calling method in FragmentMessage class
if (outMsg != null)
{
outMsg.SendNextDataFragment(true);
}
else if (queueFull)
{
// queue is full.
if (handler != null)
{
handler.Invoke(this, sduHandle, Status.Busy);
}
newItem.Dispose();
}
}
private void ReceiveData(
Header hdr,
ref Frame frame,
Byte linkQuality)
{
MacAddress srcAddr = new MacAddress(); // default: NoAddress
MacAddress dstAddr = new MacAddress(); // default: NoAddress
UInt16 srcPanId = State.cBroadcastPanId;
UInt16 dstPanId = State.cBroadcastPanId;
bool drop = (hdr.fcs.Version != Microsoft.SPOT.Wireless.IEEE_802_15_4.Mac.Frames.Version.IEEE2003 &&
hdr.fcs.Version != Microsoft.SPOT.Wireless.IEEE_802_15_4.Mac.Frames.Version.IEEE2006);
if (!drop)
{
switch (hdr.fcs.DstAddrMode)
{
case AddressingMode.None:
if (!_state.macPromiscousMode && !_state.panCoordinator)
{
drop = true;
}
break;
case AddressingMode.Short:
if (!_state.macPromiscousMode &&
((hdr.dstAddrShort != _state.macShortAddr && hdr.dstAddrShort != State.cBroadcastShortAddr) ||
(hdr.dstPanId != _state.macPanId && hdr.dstPanId != State.cBroadcastPanId)))
{
drop = true;
}
else
{
dstAddr.ShortAddress = hdr.dstAddrShort;
dstPanId = hdr.dstPanId;
}
break;
case AddressingMode.Extended:
if (!_state.macPromiscousMode &&
((hdr.dstAddrExt != _state.aExtendedAddress ||
(hdr.dstPanId != _state.macPanId && hdr.dstPanId != State.cBroadcastPanId))))
{
drop = true;
}
else
{
dstAddr.ExtendedAddress = hdr.dstAddrExt;
dstPanId = hdr.dstPanId;
}
break;
case AddressingMode.Reserved:
drop = true;
break;
}
}
if (!drop)
{
bool havePanId = false;
switch (hdr.fcs.SrcAddrMode)
{
case AddressingMode.None:
if (dstAddr.Mode == MacAddressingMode.NoAddress)
{
drop = true; // at least one address must be valid
}
break;
case AddressingMode.Short:
srcAddr.ShortAddress = hdr.srcAddrShort;
havePanId = true;
break;
case AddressingMode.Extended:
srcAddr.ExtendedAddress = hdr.srcAddrExt;
havePanId = true;
break;
case AddressingMode.Reserved:
drop = true;
break;
}
if (havePanId)
{
if (hdr.fcs.PanIdCompression)
{
if (dstAddr.Mode == MacAddressingMode.NoAddress)
{
drop = true;
}
else
{
srcPanId = dstPanId;
}
}
else
{
srcPanId = hdr.srcPanId;
}
}
}
if (!drop)
{
DataIndicationHandler ind = _DataIndication;
if (ind != null)
{
// synchronous from dataIndicationThread
try
{
ind.Invoke(this, srcAddr, srcPanId, dstAddr, dstPanId,
frame, linkQuality, hdr.seqNo, 0, new SecurityOptions());
}
catch (Exception) { }
frame = null;
}
}
}
private void ReceiveThread()
{
while (!_rxThreadStop)
{
_rxEvent.WaitOne();
lock (_hal)
{
if (_activityLeds)
{
_ledRx.enabled = true;
}
while (_hal._fifopInterrupt.Read())
{
if (_hal._fifoPort.Read())
{
// get frame length, rxFrame is single byte
_hal.WriteRead(_rxReadCmd, _rxFrame, 1);
byte len = _rxFrame[0];
if (len > 0 && len < HALCC2420.FIFOSize)
{
// get frame
byte[] buf = new byte[len];
_hal.WriteRead(_rxReadCmd, buf, 1);
Frame frame = Frame.GetFrame(2, len + 1); // len + LQI byte. Reserve 2 bytes for header in case this exact frame is resent later on.
frame.WriteToBack(buf);
// buf = null; // dispose
bool ok = true;
int lqi = 0;
if (_hal.AutoFCS)
{
// since we are using AutoCRC, MAC FCS is replaced with:
// - RSSI (first byte)
// - LQI (7 bits, lsb)
// - CRC ok (1 bit, msb)
// LQI needs to be scaled from 50..110 to 0..255 [CC.24]
int i = frame.ReadByte(len - 1);
if ((i & 0x80) == 0 || len < 3)
{ // CRC error
ok = false;
}
else
{ // calculate LQI
i &= 0x7f; // should be 50..110
if (i < 50)
{
i = 50;
}
if (i > 110)
{
i = 110;
}
// is 50..110
i -= 50;
// 0..60
lqi = (i * 255) / 60;
// 0..255 (well, within that range at least)
frame.DeleteFromBack(2); // remove FCS
}
}
else
{
lqi = GetNormalizedRSSI();
}
if (ok)
{
DataIndicationHandler ind = _DataIndication;
if (ind == null || frame.LengthDataUsed == 0)
{
Frame.Release(ref frame);
}
else
{
try
{
ind.Invoke(this, frame, (byte)lqi);
// if (buf[2] == 0)
{
DateTime curTime = DateTime.Now;
Debug.Print("Get Frm " + buf[2] + " Len " + len.ToString() + " Data " + ":" + GetHex(buf, 16) + " at " + curTime.Second + ":" + curTime.Millisecond);
}
}
catch (Exception) { }
}
}
else
{
Frame.Release(ref frame);
}
}
else
{
_hal.Command(HALCC2420.Cmd.SFlushRX);
_hal.Command(HALCC2420.Cmd.SFlushRX);
}
}
else // !m_hal.m_fifoPort.Read()
{
_hal.Command(HALCC2420.Cmd.SFlushRX);
_hal.Command(HALCC2420.Cmd.SFlushRX);
}
}
if (_activityLeds)
{
_ledRx.enabled = false;
}
}
}
}
