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ResolveIpNetEntry2 function

The ResolveIpNetEntry2 function resolves the physical address for a neighbor IP address entry on the local computer.

Syntax


NETIOAPI_API ResolveIpNetEntry2(
  _Inout_   PMIB_IPNET_ROW2 Row,
  _In_opt_  const SOCKADDR_INET *SourceAddress
);

Parameters

Row [in, out]

A pointer to a MIB_IPNET_ROW2 structure entry for a neighbor IP address entry. On successful return, this structure will be updated with the properties for neighbor IP address.

SourceAddress [in, optional]

A pointer to a an optional source IP address used to select the interface to send the requests on for the neighbor IP address entry.

Return value

If the function succeeds, the return value is NO_ERROR.

If the function fails, the return value is one of the following error codes.

Return codeDescription
ERROR_BAD_NET_NAME

The network name cannot be found. This error is returned if the network with the neighbor IP address is unreachable.

ERROR_INVALID_PARAMETER

An invalid parameter was passed to the function. This error is returned if a NULL pointer is passed in the Row parameter, the Address member of the MIB_IPNET_ROW2 pointed to by the Row parameter was not set to a valid IPv4 or IPv6 address, or both the InterfaceLuid or InterfaceIndex members of the MIB_IPNET_ROW2 pointed to by the Row parameter were unspecified. This error is also returned if a loopback address was passed in the Address member.

ERROR_NOT_FOUND

The specified interface could not be found. This error is returned if the network interface specified by the InterfaceLuid or InterfaceIndex member of the MIB_IPNET_ROW2 pointed to by the Row parameter could not be found.

ERROR_NOT_SUPPORTED

The request is not supported. This error is returned if no IPv4 stack is on the local computer and an IPv4 address was specified in the Address member of the MIB_IPNET_ROW2 pointed to by the Row parameter or no IPv6 stack is on the local computer and an IPv6 address was specified in the Address member.

Other

Use FormatMessage to obtain the message string for the returned error.

 

Remarks

The ResolveIpNetEntry2 function is defined on Windows Vista and later.

The ResolveIpNetEntry2 function is used to resolve the physical address for a neighbor IP address entry on a local computer. This function flushes any existing neighbor entry that matches the IP address on the interface and then resolves the physical address (MAC) address by sending ARP requests for an IPv4 address or neighbor solicitation requests for an IPv6 address. If the SourceAddress parameter is specified, the ResolveIpNetEntry2 function will select the interface with this source IP address to send the requests on. If the SourceAddress parameter is not specified (NULL was passed in this parameter), the ResolveIpNetEntry2 function will automatically select the best interface to send the requests on.

The Address member in the MIB_IPNET_ROW2 structure pointed to by the Row parameter must be initialized to a valid IPv4 or IPv6 address and family. In addition, at least one of the following members in the MIB_IPNET_ROW2 structure pointed to the Row parameter must be initialized to the interface: the InterfaceLuid or InterfaceIndex. The fields are used in the order listed above. So if the InterfaceLuid is specified, then this member is used to determine the interface on which to add the unicast IP address. If no value was set for the InterfaceLuid member (the values of this member was set to zero), then the InterfaceIndex member is next used to determine the interface.

If the IP address passed in the Address member of the MIB_IPNET_ROW2 pointed to by the Row parameter is a duplicate of an existing neighbor IP address on the interface, the ResolveIpNetEntry2 function will flush the existing entry before resolving the IP address.

On output when the call is successful, ResolveIpNetEntry2 retrieves the other properties for the neighbor IP address and fills out the MIB_IPNET_ROW2 structure pointed to by the Row parameter. The PhysicalAddress and PhysicalAddressLength members in the MIB_IPNET_ROW2 structure pointed to by the Row parameter will be initialized to a valid physical address.

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

Netioapi.h (include Iphlpapi.h)

Library

Iphlpapi.lib

DLL

Iphlpapi.dll

See also

CreateIpNetEntry2
DeleteIpNetEntry2
FlushIpNetTable2
GetIpNetEntry2
GetIpNetTable2
MIB_IPNET_ROW2
MIB_IPNET_TABLE2
SetIpNetEntry2
SOCKADDR_INET

 

 

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