NdisIfGetInterfaceIndexFromNetLuid function (ndis.h)

Article
04/18/2022

The NdisIfGetInterfaceIndexFromNetLuid function gets the network interface index that is associated with a NET_LUID value.

Syntax

NDIS_STATUS NdisIfGetInterfaceIndexFromNetLuid(
  [in]  NET_LUID     NetLuid,
  [out] PNET_IFINDEX pIfIndex
);

Parameters

[in] NetLuid

A NET_LUID value that identifies a network interface.

[out] pIfIndex

A pointer to a caller-supplied interface index variable. If NdisIfGetInterfaceIndexFromNetLuid succeeds, NDIS writes the network interface index that is associated with the specified NET_LUID to this variable.

Return value

NdisIfGetInterfaceIndexFromNetLuid returns one of the following status values:

Return code	Description
NDIS_STATUS_SUCCESS	The operation completed successfully.
NDIS_STATUS_INTERFACE_NOT_FOUND	NdisIfGetInterfaceIndexFromNetLuid failed because the specified NET_LUID was not present in the list of registered interfaces.

Remarks

NDIS drivers can call the NdisIfGetInterfaceIndexFromNetLuid function to get the network interface index that is associated with a NET_LUID value.

For the interfaces that the NDIS proxy provider service manages, NDIS provides the interface index and NET_LUID in various driver initialization structures:

Miniport drivers can obtain the interface index and NET_LUID for a miniport adapter in the NDIS_MINIPORT_INIT_PARAMETERS structure.
Filter drivers can obtain the interface index and NET_LUID for a filter module in the NDIS_FILTER_ATTACH_PARAMETERS structure.
Protocol drivers can obtain the interface index and NET_LUID of the highest and the lowest interfaces on a driver stack in the NDIS_BIND_PARAMETERS structure.

NDIS assigns an interface index to a network interface when the interface provider calls the NdisIfRegisterInterface function. An interface provider calls the NDIS_MAKE_NET_LUID macro to create the NET_LUID value before it registers an interface.

The interface index value can change without a computer restart. Deregistering and re-registering an interface that is associated with a NET_LUID value might result in different interface index values. Do not confuse the interface index with the NET_LUID index that persists after a computer restarts.

NDIS provides the NdisIfGetNetLuidFromInterfaceIndex function to get the NET_LUID value that is associated with a specified interface index.

Requirements

Requirement	Value
Minimum supported client	Supported in NDIS 6.0 and later.
Target Platform	Desktop
Header	ndis.h (include Ndis.h)
Library	Ndis.lib
IRQL	PASSIVE_LEVEL
DDI compliance rules	Irql_Interfaces_Function(ndis)