/// <summary>
/// Initiates a worker thread to listen for reports of device
/// changes. Listeners can register for notification of these
/// changes, which the thread will send.
/// </summary>
public void StartStatusMonitoring()
{
if (!Active)
{
// Create a point-to-point message queue to get the
// notifications.
mq = new PointToPointMsgQueue(
null, // unnamed
25, DEVDETAIL.MAX_DEVDETAIL_SIZE,
true, 0);
// Start monitoring thread.
mqt = new ThreadEx(new ThreadStart(this.StatusThread));
mqt.Start();
}
}
/// <summary>
/// Initiates a worker thread to listen for NDIS-reported
/// changes to the status of the adapter. Listeners can
/// register for notification of these changes, which the
/// thread will send.
/// </summary>
public void StartStatusMonitoring()
{
if (!Active)
{
// Create a point-to-point message queue to get the
// notifications.
mq = new PointToPointMsgQueue(
null, // unnamed
25, NDISUIO_DEVICE_NOTIFICATION.Size,
true, 0);
// Start monitoring thread.
mqt = new ThreadEx(new ThreadStart(this.StatusThread));
mqt.Start();
}
}
internal void StatusThread()
{
// Ask the system to notify our message queue when devices of
// the indicated class are added or removed.
IntPtr h = RequestDeviceNotifications(
devClass.ToGuid().ToByteArray(),
mq.Handle, fAll);
// Wait for the queue to be signaled. When it is, decode
// the message and call any listeners for it. If the
// queue closes suddenly, that's our cue to exit, shutting
// down notifications before we leave.
PointToPointMsgQueue q = mq;
while (mq != null) // Check the global object here.
{
// Wait. On return, true indicates that the queue is
// signaled; false is a chance to check whether we should
// exit.
if (q.Wait(-1))
{
// Read the event data.
int bytes = 0;
PointToPointMsgQueueFlags readFlags = 0;
DEVDETAIL devDetail = new DEVDETAIL();
if (q.ReadMsgQueue(devDetail.getBytes(),
DEVDETAIL.MAX_DEVDETAIL_SIZE,
ref bytes, -1, ref readFlags))
{
// Handle the event.
OnDeviceNotification(new DeviceNotificationArgs(
devDetail.guidDevClass, devDetail.fAttached,
devDetail.szName));
}
}
else
{
System.Diagnostics.Debug.WriteLine(this, "mq is null in monitoring thread. Exiting...");
}
}
System.Diagnostics.Debug.WriteLine(this, "exiting DeviceStatusMonitor thread.");
// Stop notifications to us.
StopDeviceNotifications(h);
}
/// <summary>
/// Stops the worker thread which monitors for changes of status
/// of the adapter. This must be done, if monitoring has been
/// started, before the object is destroyed.
/// </summary>
public void StopStatusMonitoring()
{
if (Active)
{
if (mq != null)
{
// Close the point-to-point message queue. This should
// cause any waits on it to return, allowing the thread
// to exit.
PointToPointMsgQueue q = mq;
mq = null;
q.Close();
// Wait for the monitoring thread to exit.
mqt.Join(5000);
mqt = null;
}
}
}
/// <summary>
/// Stops the worker thread which monitors for changes of status
/// of the adapter. This must be done, if monitoring has been
/// started, before the object is destroyed.
/// </summary>
public void StopStatusMonitoring()
{
if ( Active )
{
if ( mq != null )
{
// Close the point-to-point message queue. This should
// cause any waits on it to return, allowing the thread
// to exit.
PointToPointMsgQueue q = mq;
mq = null;
q.Close();
// Wait for the monitoring thread to exit.
mqt.Join( 5000 );
mqt = null;
}
}
}
/// <summary>
/// Initiates a worker thread to listen for reports of device
/// changes. Listeners can register for notification of these
/// changes, which the thread will send.
/// </summary>
public void StartStatusMonitoring()
{
if ( !Active )
{
// Create a point-to-point message queue to get the
// notifications.
mq = new PointToPointMsgQueue(
null, // unnamed
25, DEVDETAIL.MAX_DEVDETAIL_SIZE,
true, 0 );
// Start monitoring thread.
mqt = new ThreadEx( new ThreadStart( this.StatusThread ) );
mqt.Start();
}
}
internal void StatusThread()
{
// Ask NDISUIO to send us notification messages for our
// adapter.
IntPtr ndisAccess = FileEx.CreateFile(
NDISUIOPInvokes.NDISUIO_DEVICE_NAME,
FileAccess.All,
FileShare.None,
FileCreateDisposition.OpenExisting,
NDISUIOPInvokes.FILE_ATTRIBUTE_NORMAL | NDISUIOPInvokes.FILE_FLAG_OVERLAPPED);
if ((int)ndisAccess == FileEx.InvalidHandle)
{
return;
}
NDISUIO_REQUEST_NOTIFICATION ndisRequestNotification =
new NDISUIO_REQUEST_NOTIFICATION();
ndisRequestNotification.hMsgQueue = mq.Handle;
ndisRequestNotification.dwNotificationTypes =
NDISUIOPInvokes.NDISUIO_NOTIFICATION_MEDIA_SPECIFIC_NOTIFICATION |
NDISUIOPInvokes.NDISUIO_NOTIFICATION_MEDIA_CONNECT |
NDISUIOPInvokes.NDISUIO_NOTIFICATION_MEDIA_DISCONNECT |
NDISUIOPInvokes.NDISUIO_NOTIFICATION_BIND |
NDISUIOPInvokes.NDISUIO_NOTIFICATION_UNBIND;
UInt32 xcount = 0;
if (!NDISUIOPInvokes.DeviceIoControl(ndisAccess,
NDISUIOPInvokes.IOCTL_NDISUIO_REQUEST_NOTIFICATION,
ndisRequestNotification.getBytes(),
NDISUIO_REQUEST_NOTIFICATION.Size,
null, 0, ref xcount, IntPtr.Zero))
{
System.Diagnostics.Debug.WriteLine(this, "Error in DeviceIoControl to request notifications!");
}
// Each notification will be of this type.
NDISUIO_DEVICE_NOTIFICATION ndisDeviceNotification =
new NDISUIO_DEVICE_NOTIFICATION();
// Wait for the queue to be signaled. When it is, decode
// the message and call any listeners for it. If the
// queue closes suddenly, that's our cue to exit, shutting
// down NDISUIO notifications before we leave.
PointToPointMsgQueue q = mq;
while (mq != null) // Check the global object here.
{
// Wait. On return, true indicates that the queue is
// signaled; false is a chance to check whether we should
// exit.
if (q.Wait(-1))
{
// Read the event data.
int bytes = 0;
PointToPointMsgQueueFlags readFlags = 0;
if (q.ReadMsgQueue(ndisDeviceNotification.getBytes(),
NDISUIO_DEVICE_NOTIFICATION.Size,
ref bytes, -1, ref readFlags))
{
// Handle the event.
OnAdapterNotification(new AdapterNotificationArgs(
ndisDeviceNotification.ptcDeviceName,
(NdisNotificationType)ndisDeviceNotification.dwNotificationType));
}
}
else
{
System.Diagnostics.Debug.WriteLine(this, "mq is null in monitoring thread. Exiting...");
}
}
System.Diagnostics.Debug.WriteLine(this, "exiting AdapterStatusMonitor thread.");
if (!NDISUIOPInvokes.DeviceIoControl(ndisAccess,
NDISUIOPInvokes.IOCTL_NDISUIO_CANCEL_NOTIFICATION,
null, 0,
null, 0, ref xcount, IntPtr.Zero))
{
System.Diagnostics.Debug.WriteLine(this, "Error in DeviceIoControl to stop notifications!");
// ????
}
// Don't forget to close our handle to NDISUIO.
FileEx.CloseHandle(ndisAccess);
}
