UINT
ETH_QUERY_FILTER_CLASSES(
IN PETH_FILTER Filter
);
ETH_QUERY_FILTER_CLASSES is called by the NIC driver to query the Ethernet filter classes for a network interface card.
Parameters
Filter
Points to a previously created and initialized filter library database.
Return Value
ETH_QUERY_FILTER_CLASSES returns a value representing the currently enabled filter classes.
Comments
A NIC driver calls this macro before it alters registers on the network interface card to effect filtering. The timing of the call is important if a binding has altered the multicast address list.
A caller must be holding the database spin lock to use this macro, so the driver is running at IRQL DISPATCH_LEVEL.