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GetIpPathEntry (NETIOAPI) (Compact 7)

  • Article

3/12/2014

This function retrieves information for an IP path entry on a local device.

Syntax

NETIOAPI_API
  GetIpPathEntry(
    IN OUT PMIB_IPPATH_ROW  Row
    );

Parameters

  • Row
    A pointer to a MIB_IPPATH_ROW structure entry for an IP path entry. On successful return, this structure is updated with the properties for IP path entry.

Return Value

GetIpPathEntry returns STATUS_SUCCESS if the function succeeds.

If the function fails, GetIpPathEntry returns one of the following error codes:

Error Code Meaning

STATUS_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 si_family member in the Destination member of the MIB_IPPATH_ROW structure that the Row parameter points to was not set to AF_INET or AF_INET6, or both InterfaceLuid and InterfaceIndex members of the MIB_IPPATH_ROW structure were unspecified. This error is also returned if the si_family member in the Source member of the MIB_IPPATH_ROW structure did not match the destination IP address family and the si_family for the source IP address was not specified as AF_UNSPEC.

STATUS_NOT_FOUND

The specified interface could not be found. This error is returned if the function cannot find the network interface that is specified by the InterfaceLuid or InterfaceIndex member of the MIB_IPPATH_ROW structure that the Row parameter points to.

STATUS_NOT_SUPPORTED

The request is not supported. This error is returned if no IPv4 stack is located on the local device and an IPv4 address was specified in the Source and Destination members of the MIB_IPPATH_ROW structure that the Row parameter points to, or if no IPv6 stack is located on the local device and an IPv6 address was specified in the Source and Destination members.

Other

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

Remarks

The GetIpPathEntry function is used to retrieve a MIB_IPPATH_ROW structure entry.

On input, your driver must initialize the following members of the MIB_IPPATH_ROW structure that the Row parameter points to.

  • Destination
    Set to a valid IPv4 or IPv6 address and family.
  • Source
    Set the address family that is specified in the Source member to the destination IP address family that is specified in the Destination member, or to AF_UNSPEC.
  • InterfaceLuid or InterfaceIndex
    These members are used in the order that is listed earlier. So if InterfaceLuid is specified, this member is used to determine the interface. If no value was set for the InterfaceLuid member (the value of this member was set to zero), the InterfaceIndex member is next used to determine the interface.

On output, when the call is successful, GetIpPathEntry retrieves the other properties for the IP path entry and fills in the MIB_IPPATH_ROW structure that the Row parameter points to.

Your driver can call the GetIpPathTable (NETIOAPI) function to enumerate the IP path entries on a local device.

See Also

Reference

IP Helper Kernel-Mode Functions
FlushIpPathTable (NETIOAPI)
GetIpPathTable (NETIOAPI)
MIB_IPPATH_ROW
MIB_IPPATH_TABLE