/// <summary>
/// Decodes a header
/// </summary>
/// <param name="frame">The frame containing the header</param>
/// <param name="removeHeader">If true, the header will be removed from the frame after decoding</param>
/// <returns>True on success, false on decoding error</returns>
public bool ReadFromFrameHeader(Frame frame, bool removeHeader)
{
int len = 2 + 1; // fcs + seqNo
// check minimum length
if (frame.LengthDataUsed < len)
return false;
fcs.Value = frame.ReadUInt16Canonical(0);
seqNo = frame.ReadByte(2);
// calculate variable length
len = Length();
if (frame.LengthDataUsed < len)
return false;
AddressingMode dstMode = fcs.DstAddrMode;
AddressingMode srcMode = fcs.SrcAddrMode;
bool panIdCompression = fcs.PanIdCompression;
int offset = 3;
if (dstMode != AddressingMode.None)
{ // dstPanId
dstPanId = frame.ReadUInt16Canonical(offset);
offset += 2;
}
if (dstMode == AddressingMode.Short)
{ // dstAddrShort
dstAddrShort = frame.ReadUInt16Canonical(offset);
offset += 2;
}
if (dstMode == AddressingMode.Extended)
{ // dstAddrShort
dstAddrExt = frame.ReadUInt64Canonical(offset);
offset += 8;
}
if (srcMode != AddressingMode.None && !panIdCompression)
{ // srcPanId
srcPanId = frame.ReadUInt16Canonical(offset);
offset += 2;
}
if (srcMode == AddressingMode.Short)
{ // dstAddrShort
srcAddrShort = frame.ReadUInt16Canonical(offset);
offset += 2;
}
if (srcMode == AddressingMode.Extended)
{ // dstAddrShort
srcAddrExt = frame.ReadUInt64Canonical(offset);
offset += 8;
}
// FIXME: secHeader
if (removeHeader)
frame.DeleteFromFront(len);
return true;
}
/// <summary>
/// handler for mac beacon notifications
/// </summary>
/// <param name="sender"></param>
/// <param name="BSN"></param>
/// <param name="panDescriptor"></param>
/// <param name="pendingShortAddrs"></param>
/// <param name="pendingExtendedAddrs"></param>
/// <param name="beaconPayload"></param>
public void MacBeaconNotifyIndication(
IMacMgmtSap sender,
ushort BSN,
PanDescriptor panDescriptor,
ushort[] pendingShortAddrs,
UInt64[] pendingExtendedAddrs,
Frame beaconPayload)
{
if (!_scanning)
return;
ScanResultInternal res = new ScanResultInternal();
res.panDescriptor = panDescriptor;
res.isMeshProtocol = false;
if (beaconPayload.LengthDataUsed == 8)
{
UInt64 meshId = beaconPayload.ReadUInt64Canonical(0);
if (meshId == NetworkLayer.cMeshId)
{
res.isMeshProtocol = true;
}
Frame.Release(ref beaconPayload);
}
lock (_scanResults)
{
_scanResults.Add(res);
}
}
