The IP_ADDRESS_PREFIX structure stores an IP address prefix.

Syntax

typedef struct _IP_ADDRESS_PREFIX {
  SOCKADDR_INET Prefix;
  UINT8         PrefixLength;
}IP_ADDRESS_PREFIX, *PIP_ADDRESS_PREFIX;

Members

Prefix

The prefix or network part of IP the address represented as an IP address.

The SOCKADDR_INET union is defined in the Ws2ipdef.h header.

PrefixLength

The length, in bits, of the prefix or network part of the IP address. For a unicast IPv4 address, any value greater than 32 is an illegal value. For a unicast IPv6 address, any value greater than 128 is an illegal value. A value of 255 is commonly used to represent an illegal value.

Remarks

The IP_ADDRESS_PREFIX structure is defined on Windows Vista and later.

The IP_ADDRESS_PREFIX structure is the data type of the DestinationPrefix member in the MIB_IPFORWARD_ROW2 structure. A number of functions use the MIB_IPFORWARD_ROW2 structure including CreateIpForwardEntry2, DeleteIpForwardEntry2, GetBestRoute2, GetIpForwardEntry2, GetIpForwardTable2, InitializeIpForwardEntry, NotifyRouteChange2, and SetIpForwardEntry2.

Requirements

See Also

CreateIpForwardEntry2

DeleteIpForwardEntry2

GetBestRoute2

GetIpForwardEntry2

GetIpForwardTable2

InitializeIpForwardEntry

MIB_IPFORWARD_ROW2

NotifyRouteChange2

SetIpForwardEntry2

SOCKADDR_INET

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Build date: 11/12/2009