9.3.1 Resource Checking and Claiming Functions

The functions DetectCheckPortUsage and DetectCheckMemoryUsage check to see if a port/memory range is in use by some device in the system other than the current NIC driver. If the port or memory is available, the return value is STATUS_SUCCESS. Otherwise, either of the functions return an error code. The function prototypes are as follows:

NTSTATUS DetectCheckPortUsage(
IN INTERFACE_TYPE InterfaceType,
IN ULONG   BusNumber,
IN ULONG   Port,
IN ULONG   Length
);

NTSTATUS DetectCheckMemoryUsage(
IN INTERFACE_TYPE   InterfaceType,
N ULONG   BusNumber,
IN ULONG   BaseAddress,
IN ULONG                     Length
);

A successful return implies the I/O port or memory range is available for use.