DHCP_SUBNET_ELEMENT_DATA structure (dhcpsapi.h)

The DHCP_SUBNET_ELEMENT_DATA structure defines an element that describes a feature or restriction of a subnet. Together, a set of elements describes the set of IP addresses served for a subnet by DHCP.

Syntax

typedef struct _DHCP_SUBNET_ELEMENT_DATA {
  DHCP_SUBNET_ELEMENT_TYPE   ElementType;
#if ...
  union {
    DHCP_IP_RANGE       *IpRange;
    DHCP_HOST_INFO      *SecondaryHost;
    DHCP_IP_RESERVATION *ReservedIp;
    DHCP_IP_RANGE       *ExcludeIpRange;
    DHCP_IP_CLUSTER     *IpUsedCluster;
  } Element;
#if ...
  _DHCP_SUBNET_ELEMENT_UNION _DHCP_SUBNET_ELEMENT_UNION;
#else
  union {
    DHCP_IP_RANGE       *IpRange;
    DHCP_HOST_INFO      *SecondaryHost;
    DHCP_IP_RESERVATION *ReservedIp;
    DHCP_IP_RANGE       *ExcludeIpRange;
    DHCP_IP_CLUSTER     *IpUsedCluster;
  } Element;
#endif
#else
  _DHCP_SUBNET_ELEMENT_UNION _DHCP_SUBNET_ELEMENT_UNION;
#endif
} DHCP_SUBNET_ELEMENT_DATA, *LPDHCP_SUBNET_ELEMENT_DATA;

Members

ElementType

DHCP_SUBNET_ELEMENT_TYPE enumeration value describing the type of element in the subsequent field.

Element

Element.IpRange

DHCP_IP_RANGE structure that contains the set of DHCP-served IP addresses. This member is present if ElementType is set to DhcpIpRanges.

Element.SecondaryHost

DHCP_HOST_INFO structure that contains the IP addresses of secondary DHCP servers available on the subnet. This member is present if ElementType is set to DhcpSecondaryHosts.

Element.ReservedIp

DHCP_IP_RESERVATION structure that contains the set of reserved IP addresses for the subnet. This member is present if ElementType is set to DhcpExcludedIpRanges.

Element.ExcludeIpRange

DHCP_IP_RANGE structure that contains the set of excluded IP addresses. This member is present if ElementType is set to DhcpExcludedIpRanges.

Element.IpUsedCluster

DHCP_IP_CLUSTER structure that contains the set of clusters within the subnet. This member is present if ElementType is set to DhcpIpUsedClusters.

_DHCP_SUBNET_ELEMENT_UNION

Requirements

Requirement	Value
Minimum supported client	None supported
Minimum supported server	Windows Server 2008, Windows Server 2008 R2 [desktop apps only]
Header	dhcpsapi.h

See also

DHCP_SUBNET_ELEMENT_INFO_ARRAY

DHCP_SUBNET_ELEMENT_TYPE