private void ReceiveBeacon(
Header hdr,
ref Frame frame,
Byte linkQuality)
{
bool ok = true;
ok &= hdr.fcs.DstAddrMode == AddressingMode.None;
ok &= (hdr.fcs.SrcAddrMode == AddressingMode.Short || hdr.fcs.SrcAddrMode == AddressingMode.Extended);
ok &= (_state.macPromiscousMode || hdr.srcPanId == _state.macPanId || _state.macPanId == State.cBroadcastPanId);
if (hdr.fcs.Security)
ok &= (hdr.fcs.Version == Microsoft.SPOT.Wireless.IEEE_802_15_4.Mac.Frames.Version.IEEE2006);
else
ok &= (hdr.fcs.Version == Microsoft.SPOT.Wireless.IEEE_802_15_4.Mac.Frames.Version.IEEE2003);
if (!ok)
return;
Beacon beacon = new Beacon();
if (beacon.ReadFromFrame(ref frame))
{
PanDescriptor pd = new PanDescriptor();
if (hdr.fcs.SrcAddrMode == AddressingMode.Short)
pd.coordAddr.ShortAddress = hdr.srcAddrShort;
else
pd.coordAddr.ExtendedAddress = hdr.srcAddrExt;
pd.coordPanId = hdr.srcPanId;
pd.logicalChannel = _state.phyChannelNumber;
pd.channelPage = _state.phyChannelPage;
//pd.superframeSpec
pd.gtsPermit = (beacon.gtsPermit > 0);
pd.linkQuality = linkQuality;
//pd.timeStamp
//pd.securityFailure
//pd.securityOptions
if (!_state.scanning || beacon.payload != null)
{ // signal upper layer
BeaconNotifyIndicationHandler ind = _BeaconNotifyIndication;
if (ind != null)
{
ind.Invoke(this, hdr.seqNo, pd, beacon.shortAddrPending, beacon.extAddrPending, beacon.payload);
beacon.payload = null;
}
}
if (_state.scanning)
{
lock (_scannedBeacons)
{
_scannedBeacons.Add(pd);
}
}
}
}
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);
}
