public void DataRequest(
UInt16 targetAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
if (targetAddr == _addrShort)
{
// deliver frame to ourself
if (handler != null)
handler.Invoke(_net, sduHandle, Status.Success);
_data.HandleDataIndication(targetAddr, targetAddr, ref sdu);
}
else
{
// encapsulate and sent as 6LoWPAN
Message.Data data = new Message.Data();
if (data.WriteToFrameHeader(sdu))
{
DataRequest6LoWPAN(targetAddr, ref sdu, sduHandle, handler);
}
else
{
if (handler != null)
handler.Invoke(_net, sduHandle, Status.InvalidFrame);
}
}
Frame.Release(ref sdu);
}
public void DataRequest(
MacAddressingMode srcAddrMode,
MacAddress dstAddr,
UInt16 dstPanId,
ref Frame msdu,
Byte msduHandle,
TxOptions options,
SecurityOptions securityOptions,
DataConfirmHandler handler)
{
TaskDataRequest task = new TaskDataRequest(
srcAddrMode,
dstAddr,
dstPanId,
msdu,
msduHandle,
options,
securityOptions,
handler);
if (!_taskQueue.Add(task))
{
Frame.Release(ref msdu);
if (handler != null)
{
handler.Invoke(this, msduHandle, MacEnum.Congested);
}
}
msdu = null; // in any case, remove frame ownership from caller
}
/// <summary>
/// Send 6LoWPAN SDU to another device.
/// SDU must begin with a valid dispatch value and not contain any mesh header or brodcast header.
/// </summary>
/// <param name="targetShortAddr">targetAddr node, use 0xFFFF for broadcasting</param>
/// <param name="sdu">data to send. Must have sufficient space in head/tail as indicated by GetFrameHeaders.</param>
/// <param name="sduHandle">user-defined handle that is provided in result handler to identify the sdu.</param>
/// <param name="handler">handler for result</param>
public void DataRequest6Low(
UInt16 targetShortAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
_route.DataRequest6LoWPAN(targetShortAddr, ref sdu, sduHandle, handler);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="targetShortAddr">destination short address</param>
/// <param name="sdu">data to send</param>
/// <param name="sduHandle">handle associated to sdu</param>
/// <param name="handler">handler used to notify when message transmission is finished</param>
public DataRequestItem(ushort targetShortAddr, ref Frame sdu, byte sduHandle, DataConfirmHandler handler)
{
_targetShortAddress = targetShortAddr;
_sdu = sdu;
sdu = null; // take ownership of the frame
_sduHandle = sduHandle;
_handler = handler;
}
private void MacDataRequest(
UInt16 nextHopAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
MacDataRequestReal(false, nextHopAddr, 0, ref sdu, sduHandle, handler);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="targetShortAddr">destination short address</param>
/// <param name="sdu">data to send</param>
/// <param name="sduHandle">handle associated to sdu</param>
/// <param name="handler">handler used to notify when message transmission is finished</param>
public DataRequestItem(ushort targetShortAddr, ref Frame sdu, byte sduHandle, DataConfirmHandler handler)
{
_targetShortAddress = targetShortAddr;
_sdu = sdu;
sdu = null; // take ownership of the frame
_sduHandle = sduHandle;
_handler = handler;
}
/// <summary>
/// discard queued data at local node
/// </summary>
/// <param name="target">target node of message</param>
/// <param name="sduHandle">sdu handle of message</param>
/// <param name="handler">confirmation handler provided for message</param>
/// <param name="isControlMsg">true if message is control message</param>
public void DataRequestTimeout(
UInt16 target,
Byte sduHandle,
DataConfirmHandler handler,
bool isControlMsg)
{
if (handler != null)
handler.Invoke(_net, sduHandle, Status.NoRoute);
}
/// <summary>
/// Send SDU to another device.
/// </summary>
/// <param name="targetShortAddr">targetAddr node, use 0xFFFF for broadcasting</param>
/// <param name="sdu">data to send. Must have sufficient space in head/tail as indicated by GetFrameHeaders.</param>
/// <param name="sduHandle">user-defined handle that is provided in result handler to identify the sdu.</param>
/// <param name="handler">handler for result</param>
public void DataRequest(
UInt16 targetShortAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
#if USE_FRAG
_frag.DataRequest(targetShortAddr, ref sdu, sduHandle, handler);
#else
_route.DataRequest(targetShortAddr, ref sdu, sduHandle, handler);
#endif
}
public void DataRequest6LoWPAN(
UInt16 targetAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
Status result = Status.Success;
if (sdu == null || sdu.LengthHeaderAvail < _netHeader6Low || sdu.LengthDataAvail < _netTailer6Low || sdu.LengthDataUsed > _netMtu6Low)
{
result = Status.InvalidFrame;
}
else if (!_isRunning)
{
result = Status.NotRunning;
}
else
{
if (targetAddr == _addrShort)
{
// deliver frame to ourself
if (handler != null)
handler.Invoke(_net, sduHandle, Status.Success);
_data.HandleDataIndication(targetAddr, targetAddr, ref sdu);
}
else
{
// send frame to another node
if (IsMulticast(targetAddr))
{
SendData(_addrShort, targetAddr, cBroadcastShortAddr, ref sdu, sduHandle, handler);
}
else
{
// unicast
_routingTable.DataRequest(targetAddr, ref sdu, sduHandle, handler, false);
}
}
}
if (result != Status.Success)
{ // perform callback
if (handler != null)
handler.Invoke(_net, sduHandle, result);
}
Frame.Release(ref sdu);
}
/// <summary>
/// trigger data transmission from local node
/// </summary>
/// <param name="targetAddr">target node</param>
/// <param name="nextHopAddr">next hop address</param>
/// <param name="sdu">data to send</param>
/// <param name="sduHandle">handle to use in confirmation message</param>
/// <param name="handler">confirmation handler</param>
/// <param name="isControlMsg">true is message is control message, so no additional header will be added</param>
public void DataRequest(
UInt16 targetAddr,
UInt16 nextHopAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler,
bool isControlMsg)
{
if (isControlMsg)
{
MacDataRequest(nextHopAddr, ref sdu); // do not add any headers
}
else
{
SendData(_addrShort, targetAddr, nextHopAddr, ref sdu, sduHandle, handler);
}
}
/// <summary>
/// Adds broadcast/mesh headers and sends SDU to MAC
/// </summary>
/// <returns>True on success</returns>
private void SendData(
UInt16 orgAddr,
UInt16 tgtAddr,
UInt16 nextHopAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
bool success = false;
if (orgAddr != cInvalidShortAddr)
{
bool ok = true;
bool multicast = false;
if (IsMulticast(tgtAddr))
{
multicast = true;
Messages6LoWPAN.BroadcastHeader bh = new Messages6LoWPAN.BroadcastHeader();
bh.seqNo = IncSeqNoBroadcast();
ok = bh.WriteToFrameHeader(sdu);
}
if (ok && (multicast || (tgtAddr != nextHopAddr)))
{
// add mesh header
Messages6LoWPAN.MeshHeader mh = new Messages6LoWPAN.MeshHeader();
mh.originatorAddress = orgAddr;
mh.finalAddress = tgtAddr;
mh.HopsLeft = cDefaultHopLimit;
ok = mh.WriteToFrameHeader(sdu);
}
if (ok)
{
MacDataRequest(nextHopAddr, ref sdu, sduHandle, handler);
success = true;
}
}
Frame.Release(ref sdu);
if (!success && handler != null)
handler.Invoke(_net, sduHandle, Status.Busy);
}
public TaskDataRequest(
MacAddressingMode srcAddrMode,
MacAddress dstAddr,
UInt16 dstPANId,
Frame msdu,
Byte msduHandle,
TxOptions options,
SecurityOptions securityOptions,
DataConfirmHandler handler)
: base(TaskType.DataRequest)
{
this.srcAddrMode = srcAddrMode;
this.dstAddr = dstAddr;
this.dstPANId = dstPANId;
this.msdu = msdu;
this.msduHandle = msduHandle;
this.options = options;
this.securityOptions = securityOptions;
this.handler = handler;
}
public TaskDataRequest(
MacAddressingMode srcAddrMode,
MacAddress dstAddr,
UInt16 dstPANId,
Frame msdu,
Byte msduHandle,
TxOptions options,
SecurityOptions securityOptions,
DataConfirmHandler handler)
: base(TaskType.DataRequest)
{
this.srcAddrMode = srcAddrMode;
this.dstAddr = dstAddr;
this.dstPANId = dstPANId;
this.msdu = msdu;
this.msduHandle = msduHandle;
this.options = options;
this.securityOptions = securityOptions;
this.handler = handler;
}
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();
}
}
/// <summary>
/// Send SDU to another device.
/// </summary>
/// <param name="targetShortAddr">targetAddr node, use 0xFFFF for broadcasting</param>
/// <param name="sdu">data to send. Must have sufficient space in head/tail as indicated by GetFrameHeaders.</param>
/// <param name="sduHandle">user-defined handle that is provided in result handler to identify the sdu.</param>
/// <param name="handler">handler for result</param>
public void DataRequest(
UInt16 targetShortAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
#if USE_FRAG
_frag.DataRequest(targetShortAddr, ref sdu, sduHandle, handler);
#else
_route.DataRequest(targetShortAddr, ref sdu, sduHandle, handler);
#endif
}
/// <summary>
/// Send a Mac SDU using context information. SrcAddr is automatically choosen.
/// </summary>
/// <param name="msdu">The frame to sent.</param>
/// <param name="context">Sent context. If null, frame is broadcasted</param>
private void MacDataRequestReal(
bool useExtAddr,
UInt16 nextHopAddrShort,
UInt64 nextHopAddrExt,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
// srcAddr: always use short addr when available
MacAddressingMode srcAddrMode = new MacAddressingMode();
if (_addrShort == cUnallocatedShortAddr)
srcAddrMode = MacAddressingMode.ExtendedAddress;
else
srcAddrMode = MacAddressingMode.ShortAddress;
MacAddress dstAddr = new MacAddress();
if (useExtAddr)
dstAddr.ExtendedAddress = nextHopAddrExt;
else
dstAddr.ShortAddress = nextHopAddrShort;
byte msduHandle;
Mac.DataConfirmHandler macHandler;
bool broadcast = (!useExtAddr) && IsMulticast(nextHopAddrShort);
if (!broadcast || handler != null)
{ // need a send context
MessageContext.Context context = _messageContext.GetFreeContext();
if (context == null)
{ // busy
if (handler != null)
handler.Invoke(_net, sduHandle, Status.Busy);
Frame.Release(ref sdu);
return;
}
context.useExtAddr = useExtAddr;
context.nextHopShort = nextHopAddrShort;
context.nextHopExt = nextHopAddrExt;
context.dataSduHandle = sduHandle;
context.dataHandler = handler;
macHandler = MacDataConfirmHandler;
msduHandle = context.macSduHandle;
}
else
{
macHandler = null;
msduHandle = MessageContext.cHandleDontCare;
}
TxOptions tx = new TxOptions();
if (!broadcast)
tx.AcknowledgedTransmission = true;
_mac.DataRequest(
srcAddrMode,
dstAddr,
_panId,
ref sdu,
msduHandle,
tx,
new SecurityOptions(),
macHandler);
Frame.Release(ref sdu);
}
/// <summary>
/// To send sdu from local node
/// </summary>
/// <param name="tgtAddrExt"></param>
/// <param name="sduHandle"></param>
/// <param name="sdu"></param>
/// <param name="handler"></param>
public void DataRequest(
UInt16 targetAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler,
bool isControlMsg)
{
lock (_lock)
{
int i = FindTargetAddr(targetAddr);
Entry entry;
if (i == -1)
{
// create new entry
entry = AddEntry(targetAddr);
}
else
{
entry = _table[i] as Entry;
}
bool doRouteRequest = false;
if (entry.nextHopAddr == cInvalidAddr || entry.routeHasError)
{ // no route to targetAddr
// queue this message
if (entry.pendingMessages.Count == cMaxPendingMsg)
{ // delete oldest waiting msg
PendingMessage pmOld = (PendingMessage)entry.pendingMessages[0];
entry.pendingMessages.RemoveAt(0);
_routing.DataRequestTimeout(targetAddr, pmOld.sduHandle, pmOld.handler, pmOld.isControlMsg);
Frame.Release(ref pmOld.sdu);
}
PendingMessage pm = new PendingMessage();
pm.sdu = sdu;
sdu = null;
pm.sduHandle = sduHandle;
pm.handler = handler;
pm.isControlMsg = isControlMsg;
entry.pendingMessages.Add(pm);
doRouteRequest = true;
}
else
{
entry.routeInUse = true;
_routing.DataRequest(targetAddr, entry.nextHopAddr, ref sdu, sduHandle, handler, isControlMsg);
if (entry.routeHasError)
{
doRouteRequest = true;
entry.routeHasError = false;
}
}
if (doRouteRequest)
{
// initiate route request
if (!entry.routePending)
{
// we haven't asked for a route yet, start now
entry.routePending = true;
entry.requestRetryCnt = cRouteRequestRetryCnt;
entry.timeOutSet = cRouteRequestWaitTime;
_timerEvent.Set();
Trace.Print("Sending route request for 0x" + HexConverter.ConvertUintToHex(entry.targetAddr, 4) + " for data");
_routing.RouteRequest(targetAddr);
} // else: wait for ongoing request
}
}
}
public void DataRequest(
MacAddressingMode srcAddrMode,
MacAddress dstAddr,
UInt16 dstPanId,
ref Frame msdu,
Byte msduHandle,
TxOptions options,
SecurityOptions securityOptions,
DataConfirmHandler handler)
{
TaskDataRequest task = new TaskDataRequest(
srcAddrMode,
dstAddr,
dstPanId,
msdu,
msduHandle,
options,
securityOptions,
handler);
if (!_taskQueue.Add(task))
{
Frame.Release(ref msdu);
if (handler != null)
handler.Invoke(this, msduHandle, MacEnum.Congested);
}
msdu = null; // in any case, remove frame ownership from caller
}
internal OutboundFragmentationMessage(
UInt16 source,
UInt16 destination,
byte messageSeqNumber,
DataRequestHandler lowerLayerRequestHandler,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler,
int maxPduSize,
int reservedHeaderSize,
int reservedTailSize,
FragmentationMessageTimer timer
)
: base(source, destination, messageSeqNumber, lowerLayerRequestHandler, maxPduSize, reservedHeaderSize, reservedTailSize, timer)
{
if (sdu.LengthDataUsed == 0)
{
Frame.Release(ref sdu);
throw new ArgumentException("sdu is empty", "sdu");
}
int payloadSize = maxPduSize - 2 - 2; // 2 for our own header, 1 for nb fragment, 1 for fragment id
if (payloadSize == 0)
{
Frame.Release(ref sdu);
throw new ArgumentException("PDU is too small", "maxPduSize");
}
ushort flag = (ushort)(1 << 15);
_isBroadcast = (destination & flag) > 0 ? true : false;
_sdu = sdu;
sdu = null;
_sduHandle = sduHandle;
_dataConfirmHandler = handler;
_messageSeqNumber = messageSeqNumber;
_timeoutForResending = c_defaultTimeoutForResending;
_maxFragmentsBeforeAck = c_defaultMaxFragmentsBeforeAck;
// compute required nb fragments and respective indices.
int nbFragments = ((_sdu.LengthDataUsed % payloadSize) == 0) ? _sdu.LengthDataUsed / payloadSize : 1 + _sdu.LengthDataUsed / payloadSize;
if (nbFragments > byte.MaxValue)
{
throw new ArgumentException("sdu is too large.");
}
_nbFragments = (byte)nbFragments;
_endingIndices = new int[_nbFragments];
int lastIndex = -1;
for (int i = 0; i + 1 < _nbFragments; i++)
{
lastIndex += payloadSize;
_endingIndices[i] = lastIndex;
}
lastIndex += ((_sdu.LengthDataUsed % payloadSize) == 0) ? payloadSize : _sdu.LengthDataUsed % payloadSize;
_endingIndices[_nbFragments - 1] = lastIndex;
_successfullyTransmittedFragments = new BitArray(_nbFragments, false);
_lastFragmentSent = new BitArray(_nbFragments, false);
}
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();
}
}
internal OutboundFragmentationMessage(
UInt16 source,
UInt16 destination,
byte messageSeqNumber,
DataRequestHandler lowerLayerRequestHandler,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler,
int maxPduSize,
int reservedHeaderSize,
int reservedTailSize,
FragmentationMessageTimer timer
)
: base(source, destination, messageSeqNumber, lowerLayerRequestHandler, maxPduSize, reservedHeaderSize, reservedTailSize, timer)
{
if (sdu.LengthDataUsed == 0)
{
Frame.Release(ref sdu);
throw new ArgumentException("sdu is empty", "sdu");
}
int payloadSize = maxPduSize - 2 - 2; // 2 for our own header, 1 for nb fragment, 1 for fragment id
if (payloadSize == 0)
{
Frame.Release(ref sdu);
throw new ArgumentException("PDU is too small", "maxPduSize");
}
ushort flag = (ushort)(1 << 15);
_isBroadcast = (destination & flag) > 0 ? true : false;
_sdu = sdu;
sdu = null;
_sduHandle = sduHandle;
_dataConfirmHandler = handler;
_messageSeqNumber = messageSeqNumber;
_timeoutForResending = c_defaultTimeoutForResending;
_maxFragmentsBeforeAck = c_defaultMaxFragmentsBeforeAck;
// compute required nb fragments and respective indices.
int nbFragments = ((_sdu.LengthDataUsed % payloadSize) == 0) ? _sdu.LengthDataUsed / payloadSize : 1 + _sdu.LengthDataUsed / payloadSize;
if (nbFragments > byte.MaxValue)
throw new ArgumentException("sdu is too large.");
_nbFragments = (byte)nbFragments;
_endingIndices = new int[_nbFragments];
int lastIndex = -1;
for (int i = 0; i + 1 < _nbFragments; i++)
{
lastIndex += payloadSize;
_endingIndices[i] = lastIndex;
}
lastIndex += ((_sdu.LengthDataUsed % payloadSize) == 0) ? payloadSize : _sdu.LengthDataUsed % payloadSize;
_endingIndices[_nbFragments - 1] = lastIndex;
_successfullyTransmittedFragments = new BitArray(_nbFragments, false);
_lastFragmentSent = new BitArray(_nbFragments, false);
}
/// <summary>
/// To send sdu from local node
/// </summary>
/// <param name="tgtAddrExt"></param>
/// <param name="sduHandle"></param>
/// <param name="sdu"></param>
/// <param name="handler"></param>
public void DataRequest(
UInt16 targetAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler,
bool isControlMsg)
{
lock (_lock)
{
int i = FindTargetAddr(targetAddr);
Entry entry;
if (i == -1)
{
// create new entry
entry = AddEntry(targetAddr);
}
else
{
entry = _table[i] as Entry;
}
bool doRouteRequest = false;
if (entry.nextHopAddr == cInvalidAddr || entry.routeHasError)
{ // no route to targetAddr
// queue this message
if (entry.pendingMessages.Count == cMaxPendingMsg)
{ // delete oldest waiting msg
PendingMessage pmOld = (PendingMessage)entry.pendingMessages[0];
entry.pendingMessages.RemoveAt(0);
_routing.DataRequestTimeout(targetAddr, pmOld.sduHandle, pmOld.handler, pmOld.isControlMsg);
Frame.Release(ref pmOld.sdu);
}
PendingMessage pm = new PendingMessage();
pm.sdu = sdu;
sdu = null;
pm.sduHandle = sduHandle;
pm.handler = handler;
pm.isControlMsg = isControlMsg;
entry.pendingMessages.Add(pm);
doRouteRequest = true;
}
else
{
entry.routeInUse = true;
_routing.DataRequest(targetAddr, entry.nextHopAddr, ref sdu, sduHandle, handler, isControlMsg);
if (entry.routeHasError)
{
doRouteRequest = true;
entry.routeHasError = false;
}
}
if (doRouteRequest)
{
// initiate route request
if (!entry.routePending)
{
// we haven't asked for a route yet, start now
entry.routePending = true;
entry.requestRetryCnt = cRouteRequestRetryCnt;
entry.timeOutSet = cRouteRequestWaitTime;
_timerEvent.Set();
Trace.Print("Sending route request for 0x" + HexConverter.ConvertUintToHex(entry.targetAddr, 4) + " for data");
_routing.RouteRequest(targetAddr);
} // else: wait for ongoing request
}
}
}
/// <summary>
/// Send 6LoWPAN SDU to another device.
/// SDU must begin with a valid dispatch value and not contain any mesh header or brodcast header.
/// </summary>
/// <param name="targetShortAddr">targetAddr node, use 0xFFFF for broadcasting</param>
/// <param name="sdu">data to send. Must have sufficient space in head/tail as indicated by GetFrameHeaders.</param>
/// <param name="sduHandle">user-defined handle that is provided in result handler to identify the sdu.</param>
/// <param name="handler">handler for result</param>
public void DataRequest6Low(
UInt16 targetShortAddr,
ref Frame sdu,
Byte sduHandle,
DataConfirmHandler handler)
{
_route.DataRequest6LoWPAN(targetShortAddr, ref sdu, sduHandle, handler);
}