MIB_IPSTATS_LH structure (ipmib.h)

The MIB_IPSTATS structure stores information about the IP protocol running on a particular computer.

Syntax

typedef struct _MIB_IPSTATS_LH {
  union {
    DWORD                  dwForwarding;
    MIB_IPSTATS_FORWARDING Forwarding;
  };
  DWORD dwDefaultTTL;
  DWORD dwInReceives;
  DWORD dwInHdrErrors;
  DWORD dwInAddrErrors;
  DWORD dwForwDatagrams;
  DWORD dwInUnknownProtos;
  DWORD dwInDiscards;
  DWORD dwInDelivers;
  DWORD dwOutRequests;
  DWORD dwRoutingDiscards;
  DWORD dwOutDiscards;
  DWORD dwOutNoRoutes;
  DWORD dwReasmTimeout;
  DWORD dwReasmReqds;
  DWORD dwReasmOks;
  DWORD dwReasmFails;
  DWORD dwFragOks;
  DWORD dwFragFails;
  DWORD dwFragCreates;
  DWORD dwNumIf;
  DWORD dwNumAddr;
  DWORD dwNumRoutes;
} MIB_IPSTATS_LH, *PMIB_IPSTATS_LH;

Members

dwForwarding

Type: DWORD

Specifies whether IP forwarding is enabled or disabled for a protocol (IPv4 or IPv6).

On Windows Vista and later, this member is defined as a union containing a DWORD dwForwarding member and a MIB_IPSTATS_FORWARDING Forwarding member where MIB_IPSTATS_FORWARDING is an enumeration defined in the Ipmib.h header file.

Value	Meaning
MIB_IP_FORWARDING 1	IP forwarding is enabled.
MIB_IP_NOT_FORWARDING 2	IP forwarding is not enabled.
MIB_USE_CURRENT_FORWARDING 0xffff	Use the current IP forwarding setting. This value is only applicable when setting the forwarding and time-to-live (TTL) options using the SetIpStatistics and SetIpStatisticsEx functions.

Forwarding

dwDefaultTTL

Type: DWORD

The default initial time-to-live (TTL) for datagrams originating on a particular computer.

This member can be set to MIB_USE_CURRENT_TTL to use the current default TTL value when setting the forwarding and time-to-live (TTL) options using the SetIpStatistics and SetIpStatisticsEx functions.

dwInReceives

Type: DWORD

The number of datagrams received.

dwInHdrErrors

Type: DWORD

The number of datagrams received that have header errors.

dwInAddrErrors

Type: DWORD

The number of datagrams received that have address errors.

dwForwDatagrams

Type: DWORD

The number of datagrams forwarded.

dwInUnknownProtos

Type: DWORD

The number of datagrams received that have an unknown protocol.

dwInDiscards

Type: DWORD

The number of received datagrams discarded.

dwInDelivers

Type: DWORD

The number of received datagrams delivered.

dwOutRequests

Type: DWORD

The number of outgoing datagrams that IP is requested to transmit. This number does not include forwarded datagrams.

dwRoutingDiscards

Type: DWORD

The number of outgoing datagrams discarded.

dwOutDiscards

Type: DWORD

The number of transmitted datagrams discarded.

dwOutNoRoutes

Type: DWORD

The number of datagrams for which this computer did not have a route to the destination IP address. These datagrams were discarded.

dwReasmTimeout

Type: DWORD

The amount of time allowed for all pieces of a fragmented datagram to arrive. If all pieces do not arrive within this time, the datagram is discarded.

dwReasmReqds

Type: DWORD

The number of datagrams that require re-assembly.

dwReasmOks

Type: DWORD

The number of datagrams that were successfully reassembled.

dwReasmFails

Type: DWORD

The number of datagrams that cannot be reassembled.

dwFragOks

Type: DWORD

The number of datagrams that were fragmented successfully.

dwFragFails

Type: DWORD

The number of datagrams that have not been fragmented because the IP header specifies no fragmentation. These datagrams are discarded.

dwFragCreates

Type: DWORD

The number of fragments created.

dwNumIf

Type: DWORD

The number of interfaces.

dwNumAddr

Type: DWORD

The number of IP addresses associated with this computer.

dwNumRoutes

Type: DWORD

The number of routes in the IP routing table.

Remarks

The MIB_IPSTATS structure stores information per protocol (IPv4 or IPv6).

The dwForwarding member specifies the per-protocol forwarding state for IPv4 or IPv6, not the forwarding state for an interface. The forwarding state of each interface state is the state that is in affect for that interface. The per-protocol state returned by the GetIpStatistics or the GetIpStatisticsEx function is not the forwarding state in affect. The dwForwarding member exists to serve two purposes:

• Provides a default value for the forwarding state when a new interface is created with no specific forwarding state (neither disabled nor enabled) . This value is inherited per-protocol state.
• Provides a value set by a domain administrator to enable or disable a per-protocol forwarding state. The forwarding states of all interfaces using that protocol are also enabled or disabled.

On the Microsoft Windows Software Development Kit (SDK) released for Windows Vista and later, the organization of header files has changed and the MIB_IPSTATS structure is defined in the Ipmib.h header file not in the Iprtrmib.h header file. Note that the Ipmib.h header file is automatically included in Iprtrmib.h which is automatically included in the Iphlpapi.h header file. The Ipmib.h and Iprtrmib.h header files should never be used directly.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	ipmib.h (include Iphlpapi.h)

See also

GetIpStatistics

GetIpStatisticsEx

SetIpStatistics

SetIpStatisticsEx