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NL_PREFIX_ORIGIN enumeration (nldef.h)

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The IP_PREFIX_ORIGIN enumeration specifies the origin of an IPv4 or IPv6 address prefix, and is used with the IP_ADAPTER_UNICAST_ADDRESS structure.

Syntax

typedef enum {
  IpPrefixOriginOther = 0,
  IpPrefixOriginManual,
  IpPrefixOriginWellKnown,
  IpPrefixOriginDhcp,
  IpPrefixOriginRouterAdvertisement,
  IpPrefixOriginUnchanged = 1 << 4
} NL_PREFIX_ORIGIN;

Constants

 
IpPrefixOriginOther
Value: 0
The IP prefix was provided by a source other than those defined in this enumeration.
IpPrefixOriginManual
The IP address prefix was manually specified.
IpPrefixOriginWellKnown
The IP address prefix is from a well known source.
IpPrefixOriginDhcp
The IP address prefix was provided by DHCP settings.
IpPrefixOriginRouterAdvertisement
The IP address prefix was obtained through a router advertisement (RA).
IpPrefixOriginUnchanged
Value: 1
The IP address prefix should be unchanged. This value is used when setting the properties for a unicast IP interface when the value for the IP prefix origin should be left unchanged.



Note  This enumeration value is only available on Windows Vista and later.

 

Remarks

The IP_PREFIX_ORIGIN enumeration is used in the PrefixOrigin member of the IP_ADAPTER_UNICAST_ADDRESS structure.

On the Microsoft Windows Software Development Kit (SDK) released for Windows Vista and later, the organization of header files has changed and the IP_PREFIX_ORIGIN enumeration is defined in the Nldef.h header file which is automatically included by the Iptypes.h header file. In order to use the IP_PREFIX_ORIGIN enumeration, the Winsock2.h header file must be included before the Iptypes.h header file.

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header nldef.h (include Iphlpapi.h on Windows 8, Windows Server 2008 R2, Windows 7, Windows Server 2008 Windows Vista)

See also

IP_ADAPTER_UNICAST_ADDRESS