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FwpmLayerEnum0 function (fwpmk.h)

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The FwpmLayerEnum0 function returns the next page of results from the layer enumerator.

Syntax

NTSTATUS FwpmLayerEnum0(
  [in]  HANDLE      engineHandle,
  [in]  HANDLE      enumHandle,
  [in]  UINT32      numEntriesRequested,
  [out] FWPM_LAYER0 ***entries,
  [out] UINT32      *numEntriesReturned
);

Parameters

[in] engineHandle

Handle for an open session to the filter engine. Call FwpmEngineOpen0 to open a session to the filter engine.

[in] enumHandle

Handle for a layer enumeration created by a call to FwpmLayerCreateEnumHandle0.

[in] numEntriesRequested

The number of layer entries requested.

[out] entries

Addresses of the enumeration entries.

[out] numEntriesReturned

The number of layer entries returned.

Return value

Return code/value Description
ERROR_SUCCESS
0		 The layers were enumerated successfully.
FWP_E_* error code
0x80320001—0x80320039		 A Windows Filtering Platform (WFP) specific error. See WFP Error Codes for details.
RPC_* error code
0x80010001—0x80010122		 Failure to communicate with the remote or local firewall engine.
Other NTSTATUS codes An error occurred.

Remarks

If the numEntriesReturned is less than the numEntriesRequested, the enumeration is exhausted.

The returned array of entries (but not the individual entries themselves) must be freed by a call to FwpmFreeMemory0.

A subsequent call using the same enumeration handle will return the next set of items following those in the last output buffer.

FwpmLayerEnum0 is a specific implementation of FwpmLayerEnum. See WFP Version-Independent Names and Targeting Specific Versions of Windows for more information.

Requirements

Requirement Value
Minimum supported client Available starting with Windows Vista.
Target Platform Universal
Header fwpmk.h
Library fwpkclnt.lib
IRQL <= PASSIVE_LEVEL

See also