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Accessing configuration information

The NetAdapterCx class extension supports a set of functions that provide access to client driver registry parameters.

Typically, the client driver reads configuration info from its EVT_WDF_DRIVER_DEVICE_ADD callback function.

For a NetAdapter object, start by calling NetAdapterOpenConfiguration to get a handle to a configuration object. You can then query it:

NETCONFIGURATION configuration;

status = NetAdapterOpenConfiguration(NetAdapter, 
                                     WDF_NO_OBJECT_ATTRIBUTES, 
                                     &configuration);
if (!NT_SUCCESS(status)) {
    return status;
}

status = NetConfigurationQueryUlong(configuration, 
                                    NET_CONFIGURATION_QUERY_ULONG_NO_FLAGS, 
                                    &SomeValue, 
                                    &myvalue);

NetConfigurationClose(configuration);

Opening and querying a configuration object for a net device is similar:

status = NetDeviceOpenConfiguration(Device, 
                                    WDF_NO_OBJECT_ATTRIBUTES, 
                                    &configuration);
if(!NT_SUCCESS(status))
{
    return status;
}

WDFCOLLECTION myStrings;

DECLARE_CONST_UNICODE_STRING(myValueName, L"ExampleValueName");

status = NetConfigurationQueryMultiString(configuration,
                                          myValueName,
                                          WDF_NO_OBJECT_ATTRIBUTES,
                                          myStrings);

There are NetConfiguration* functions for querying ULONG data, strings, multi-strings (similar to REG_MULTI_SZ), binary blobs, and software-configurable network addresses: