private void BeaconRequest()
{
bool send = true;
Frame frame = null;
lock (_state)
{
if (_state.autoBeacon)
{
Header hdr = new Header();
hdr.fcs.SrcAddrMode = AddressingMode.Short;
hdr.srcAddrShort = _state.macShortAddr;
hdr.srcPanId = _state.macPanId;
hdr.seqNo = _state.macBSN++;
Beacon bc = new Beacon();
bc.beaconOrder = _state.macBeaconOrder;
bc.superframeOrder = _state.macSuperframeOrder;
// finalCapSlot
// batteryLifeExtension
if (_state.panCoordinator)
bc.panCoordinator = 1;
bc.associationPermit = 0;
// gtsPermit
// gtsDirectionsMask
// gtsDescriptor;
// shortAddrPending;
// extAddrPending;
bc.payload = _state.macBeaconPayload;
int lenHeader = hdr.Length();
int len = _state.phyFrameHead + lenHeader; ;
frame = Frame.GetFrame(len + bc.Length() + _state.phyFrameTail);
frame.ReserveHeader(len);
if (bc.WriteToFrame(frame) && hdr.WriteToFrameHeader(frame))
{
send = true;
}
}
}
if (send)
{
_sendReceive.SendFrame(ref frame, false, 0);
}
Frame.Release(ref frame);
}
private Frame Encode(Header header, Command.Base cmd)
{
int lenHeader = header.Length();
int len = _state.phyFrameHead + lenHeader; ;
Frame frame = Frame.GetFrame(len, cmd.LengthMax + _state.phyFrameTail);
if (!cmd.WriteToFrame(frame) || !header.WriteToFrameHeader(frame))
{
Frame.Release(ref frame);
Trace.Print("Mac: unable to create command frame");
return null;
}
return frame;
}
private void DataRequest(TaskDataRequest task)
{
if (task == null)
return;
MacEnum result = MacEnum.Success;
bool is2006 = false;
// check frame
if (task.msdu == null || task.msdu.LengthDataUsed == 0)
{
result = MacEnum.InvalidParameter;
}
else if (task.msdu.LengthDataUsed > State.aMaxMACSafePayloadSize)
{
if (_state.phySupports2006)
{
is2006 = true;
}
else
{
result = MacEnum.FrameTooLong;
}
}
if (result == MacEnum.Success)
{
// data request is a value type, cannot be null
Header hdr = new Header();
hdr.fcs.Type = Frames.Type.Data;
if (is2006)
hdr.fcs.Version = Frames.Version.IEEE2006;
else
hdr.fcs.Version = Frames.Version.IEEE2003;
if (task.options.AcknowledgedTransmission)
hdr.fcs.Ack = true;
// FIXME: security
lock (_state)
{
hdr.seqNo = _state.macDSN++;
// dst address
hdr.dstPanId = task.dstPANId;
switch (task.dstAddr.Mode)
{
case MacAddressingMode.NoAddress:
hdr.fcs.DstAddrMode = AddressingMode.None;
break;
case MacAddressingMode.ShortAddress:
hdr.fcs.DstAddrMode = AddressingMode.Short;
hdr.dstAddrShort = task.dstAddr.ShortAddress;
break;
case MacAddressingMode.ExtendedAddress:
hdr.fcs.DstAddrMode = AddressingMode.Extended;
hdr.dstAddrExt = task.dstAddr.ExtendedAddress;
break;
}
// src addr
if (_state.macPanId == task.dstPANId)
{
hdr.fcs.PanIdCompression = true;
}
else
{
hdr.srcPanId = _state.macPanId;
}
switch (task.srcAddrMode)
{
case MacAddressingMode.NoAddress:
hdr.fcs.SrcAddrMode = AddressingMode.None;
break;
case MacAddressingMode.ShortAddress:
hdr.fcs.SrcAddrMode = AddressingMode.Short;
hdr.srcAddrShort = _state.macShortAddr;
break;
case MacAddressingMode.ExtendedAddress:
hdr.fcs.SrcAddrMode = AddressingMode.Extended;
hdr.srcAddrExt = _state.aExtendedAddress;
break;
}
}
// encode
result = MacEnum.Congested;
if (hdr.WriteToFrameHeader(task.msdu))
{
if (task.msdu.LengthDataUsed > State.aMaxPhyPacketSize)
{
result = MacEnum.FrameTooLong;
}
else
{
result = _sendReceive.SendFrame(ref task.msdu, task.options.AcknowledgedTransmission, hdr.seqNo);
}
}
else
{
Trace.Print("Mac: DataRequest: cannot add Mac header");
}
}
Frame.Release(ref task.msdu);
if (task.handler != null)
{
task.handler.Invoke(this, task.msduHandle, result);
}
}