How does the Control Point know if the Device disappears without saying goodbye?

[dough]

It seems that my Control Point only receives the device removed notification/callback when the Device explicitly removes itself from the network by calling DvDeviceSetDisabled.

In my device, I am catching SIGINT and SIGABRT so that if anything goes wrong, I can disable the device and clean up, and the Control Point will get the removed notification.

However, if the device is simply powered off, the Control Point doesn't receive such a notification and therefore cannot pass on the news to the user that the device has gone AWOL.

Should I be doing something explicitly to poll the device for it's presence?
Am I missing something obvious? Or should I really be getting the removed callback/notification in this scenario?


Happy for your advice...

Doug