private void ScanHandlerStartRequest(
object sender,
Status status,
ScanResult[] networks)
{
_logicalChannel = 0;
_channelPage = 0;
if (status == Status.Success)
{
// first check if there are nodes of target network already -> use same channel
UInt16[] neighborAddr;
status = FindNetwork(out neighborAddr);
if (status == Status.NoNeighbor)
{
// perform ED scan
bool found = true;
byte energy = 0xff; // max
AutoResetEvent callbackEvent = new AutoResetEvent(false);
Trace.Print("Performing ED scan");
int length = _scanChannels.Length;
for (int i = 0; i < length; i++)
{
UInt32 channels = (UInt32)_scanChannels[i];
UInt32 page = (channels >> 27);
channels &= 0x07FFFFFF; // remove page
// FIXME: how to select scanDuration?
byte scanDuration = 5;
_net.Mac.ScanRequest(ScanType.ED, channels, scanDuration, (byte)page, new SecurityOptions(), delegate(
IMacMgmtSap senderDlgt,
MacEnum statusDlgt,
ScanType scanTypeDlgt,
Byte channelPageDlgt,
UInt32 unscannedChannelDlgt,
byte[] energyDetectListDlgt,
PanDescriptor[] panDescriptorListDlgt)
{
if (statusDlgt == MacEnum.Success && energyDetectListDlgt != null)
{
int idx = 0;
for (int c = 0; c < 27; c++)
{
if ((channels & (1 << c)) > 0)
{ // channel 'c' was requested
if (((unscannedChannelDlgt & (1 << c)) == 0) && // channel was measured
(idx < energyDetectListDlgt.Length))
{ // result is avaiable
Trace.Print("channel " + c + ": energy level " + energyDetectListDlgt[idx]);
if (energyDetectListDlgt[idx] < energy)
{ // result is better
found = true;
energy = energyDetectListDlgt[idx];
_logicalChannel = (byte)c;
_channelPage = channelPageDlgt;
}
}
idx++;
}
}
}
callbackEvent.Set();
});
callbackEvent.WaitOne();
}
if (found)
{
status = Status.Success;
Trace.Print("Starting new network on channel " + _logicalChannel + ", page " + _channelPage);
}
else
{
status = Status.Error;
Trace.Print("ED scan failed");
}
}
if (status == Status.Success)
{
Trace.Print("Using Pan Id=0x" + HexConverter.ConvertUintToHex(_panId, 4) +
", logicalChannel=" + _logicalChannel + ", channelPage=" + _channelPage);
_net.Routing.Start(_panId, true, _logicalChannel, _channelPage, null, StartHandlerStartRequest);
return;
}
}
// scanning failed
StartHandlerStartRequest(null, status, 0);
}
private void ScanHandlerJoinRequest(
object sender,
Status status,
ScanResult[] networks)
{
_logicalChannel = 0;
_channelPage = 0;
if (status == Status.Success)
{
// find properties of target network
UInt16[] neighborAddr;
status = FindNetwork(out neighborAddr);
if (status == Status.Success)
{
Trace.Print("Joining network on Pan Id=0x" + HexConverter.ConvertUintToHex(_panId, 4) +
", logicalChannel=" + _logicalChannel + ", channelPage=" + _channelPage);
_net.Routing.Start(_panId, false, _logicalChannel, _channelPage, neighborAddr, StartHandlerJoinRequest);
return;
}
}
StartHandlerJoinRequest(null, status, 0);
}
private void FinishScanningThread()
{
Status status = _scanStatus;
ScanResult[] networks = null;
if (status == Status.Success)
{
lock (_scanResults)
{
int countMesh = 0;
int countAll = _scanResults.Count;
for (int i = 0; i < countAll; i++)
{
ScanResultInternal itemInt = (ScanResultInternal)_scanResults[i];
if (itemInt.isMeshProtocol)
countMesh++;
}
if (countMesh > 0)
{
networks = new ScanResult[countMesh];
countMesh = 0;
for (int i = 0; i < countAll; i++)
{
ScanResultInternal itemInt = (ScanResultInternal)_scanResults[i];
if (itemInt.isMeshProtocol)
{
ScanResult itemExt = new ScanResult();
itemExt.panId = itemInt.panDescriptor.coordPanId;
itemExt.linkQuality = itemInt.panDescriptor.linkQuality;
networks[countMesh++] = itemExt;
}
}
}
}
}
ScanConfirmHandler handler = _scanConfirmHandler;
_scanning = false; // when invoking handler, handler can start next scan
handler.Invoke(_net, status, networks);
}
