/// <summary>
/// Stops this UPnP network tracker's activity, i.e. closes the UPnP network listener and clears all
/// <see cref="KnownRootDevices"/>.
/// </summary>
public void Close()
{
lock (_cpData.SyncObj)
{
if (!_active)
{
return;
}
_active = false;
foreach (RootEntry entry in _cpData.SSDPController.RootEntries)
{
RootDescriptor rd = GetRootDescriptor(entry);
if (rd == null)
{
continue;
}
InvalidateDescriptor(rd);
}
SSDPClientController ssdpController = _cpData.SSDPController;
ssdpController.Close();
ssdpController.RootDeviceAdded -= OnSSDPRootDeviceAdded;
ssdpController.RootDeviceRemoved -= OnSSDPRootDeviceRemoved;
ssdpController.DeviceRebooted -= OnSSDPDeviceRebooted;
ssdpController.DeviceConfigurationChanged -= OnSSDPDeviceConfigurationChanged;
_cpData.SSDPController = null;
foreach (DescriptionRequestState state in _pendingRequests)
{
state.Request.Abort();
}
_pendingRequests.Clear();
}
}
/// <summary>
/// Starts this UPnP network tracker. After the tracker is started, its <see cref="RootDeviceAdded"/> and
/// <see cref="RootDeviceRemoved"/> events will begin to be raised when UPnP devices become available at the network of when
/// UPnP devices disappear from the network.
/// </summary>
public void Start()
{
lock (_cpData.SyncObj)
{
if (_active)
{
throw new IllegalCallException("UPnPNetworkTracker is already active");
}
_active = true;
SSDPClientController ssdpController = new SSDPClientController(_cpData);
ssdpController.RootDeviceAdded += OnSSDPRootDeviceAdded;
ssdpController.RootDeviceRemoved += OnSSDPRootDeviceRemoved;
ssdpController.DeviceRebooted += OnSSDPDeviceRebooted;
ssdpController.DeviceConfigurationChanged += OnSSDPDeviceConfigurationChanged;
_cpData.SSDPController = ssdpController;
ssdpController.Start();
ssdpController.SearchAll(null);
}
}