internal BluetoothDevice(BluetoothRadio radio, BluetoothInterop.BluetoothDeviceInfo devInfo)
{
Contract.Requires(radio != null && !radio.IsDisposed);
this.radio = radio;
this.devInfo = devInfo;
}
public BluetoothDevice[] FindDevices(TimeSpan timeout,
bool includeAuthenticated = true,
bool includeConnected = true, bool includeRemembered = true,
bool includeUnknown = true, bool issueInquiry = true)
{
Contract.Requires(timeout >= TimeSpan.Zero);
Contract.Requires(timeout <= TimeSpan.FromSeconds(48 * BluetoothInterop.TIMEOUT_MULTIPLIER_UNIT_SEC));
Contract.Requires(!IsDisposed);
Contract.Ensures(Contract.Result <BluetoothDevice[]>() != null);
Contract.Ensures(Contract.ForAll(Contract.Result <BluetoothDevice[]>(), d => d != null && d.Radio == this));
var prms = new BluetoothInterop.BluetoothDeviceSearchParams
{
Size = BluetoothInterop.BluetoothDeviceSearchParams.SIZE,
hRadio = handle,
ReturnAuthenticated = includeAuthenticated,
ReturnConnected = includeConnected,
ReturnRemembered = includeRemembered,
ReturnUnknown = includeUnknown,
IssueInquiry = issueInquiry,
TimeoutMultiplier = Convert.ToByte(Math.Round(timeout.TotalSeconds / BluetoothInterop.TIMEOUT_MULTIPLIER_UNIT_SEC)),
};
var devInfo = new BluetoothInterop.BluetoothDeviceInfo
{
Size = BluetoothInterop.BluetoothDeviceInfo.SIZE
};
var res = new List <BluetoothDevice>();
var hFind = BluetoothInterop.BluetoothFindFirstDevice(ref prms, ref devInfo);
if (hFind != IntPtr.Zero)
{
while (true)
{
res.Add(new BluetoothDevice(this, devInfo));
if (!BluetoothInterop.BluetoothFindNextDevice(hFind, ref devInfo))
{
var hr = Marshal.GetLastWin32Error();
if (hr != 0 && hr != BluetoothInterop.ERROR_NO_MORE_ITEMS)
{
Trace.TraceWarning("BluetoothFindNextDevice failed with error code {0}", hr);
BluetoothInterop.ThrowBluetoothException(hr);
}
break;
}
}
if (!BluetoothInterop.BluetoothFindDeviceClose(hFind))
{
var hr = Marshal.GetLastWin32Error();
Trace.TraceWarning("BluetoothFindDeviceClose failed with error code {0}", hr);
}
}
else
{
var hr = Marshal.GetLastWin32Error();
if (hr != 0 && hr != BluetoothInterop.ERROR_NO_MORE_ITEMS)
{
Trace.TraceWarning("BluetoothFindFirstDevice failed with error code {0}", hr);
BluetoothInterop.ThrowBluetoothException(hr);
}
}
return(res.ToArray());
}
