ConvertInterfaceLuidToNameW function (netioapi.h)

Article
02/09/2023

The ConvertInterfaceLuidToNameW function converts a locally unique identifier (LUID) for a network interface to the Unicode interface name.

Syntax

IPHLPAPI_DLL_LINKAGE _NETIOAPI_SUCCESS_ NETIOAPI_API ConvertInterfaceLuidToNameW(
  [in]  const NET_LUID *InterfaceLuid,
  [out] PWSTR          InterfaceName,
  [in]  SIZE_T         Length
);

Parameters

[in] InterfaceLuid

A pointer to a NET_LUID for a network interface.

[out] InterfaceName

A pointer to a buffer to hold the NULL-terminated Unicode string containing the interface name when the function returns successfully.

[in] Length

The number of characters in the array pointed to by the InterfaceName parameter. This value must be large enough to accommodate the interface name and the terminating null character. The maximum required length is NDIS_IF_MAX_STRING_SIZE + 1.

Return value

On success, ConvertInterfaceLuidToNameW returns NETIO_ERROR_SUCCESS. Any nonzero return value indicates failure.

Error code	Meaning
ERROR_INVALID_PARAMETER	One of the parameters was invalid. This error is returned if either the InterfaceLuid or the InterfaceName parameter was NULL or if the InterfaceLuid parameter was invalid.
ERROR_NOT_ENOUGH_MEMORY	Not enough storage is available to process this command. This error is returned if the size of the buffer pointed to by InterfaceName parameter was not large enough as specified in the Length parameter to hold the interface name.

Remarks

The ConvertInterfaceLuidToNameW function is available on Windows Vista and later.

The ConvertInterfaceLuidToNameW function is protocol independent and works with network interfaces for both the IPv6 and IPv4 protocol. The ConvertInterfaceLuidToNameW converts a network interface LUID to a Unicode interface name.

The ConvertInterfaceLuidToNameA converts an ANSI interface name to a LUID.

The maximum length of an interface name, NDIS_IF_MAX_STRING_SIZE, without the terminating NULL is declared in the Ntddndis.h header file. The NDIS_IF_MAX_STRING_SIZE is defined to be the IF_MAX_STRING_SIZE constant defined in the Ifdef.h header file. The Ntddndis.h and Ifdef.h header files are automatically included in the Netioapi.h header file which is automatically included by the Iphlpapi.h header file. The Ntddndis.h, Ifdef.h, and Netioapi.h header files should never be used directly.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Target Platform	Windows
Header	netioapi.h (include Iphlpapi.h)
Library	Iphlpapi.lib
DLL	Iphlpapi.dll