FwpmProviderEnum0 function (fwpmu.h)

Article
10/13/2021

The FwpmProviderEnum0 function returns the next page of results from the provider enumerator.

Syntax

DWORD FwpmProviderEnum0(
  [in]  HANDLE         engineHandle,
  [in]  HANDLE         enumHandle,
  [in]  UINT32         numEntriesRequested,
  [out] FWPM_PROVIDER0 ***entries,
  [out] UINT32         *numEntriesReturned
);

Parameters

[in] engineHandle

Type: HANDLE

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

[in] enumHandle

Type: HANDLE

Handle for a provider enumeration created by a call to FwpmProviderCreateEnumHandle0.

[in] numEntriesRequested

Type: UINT32

The number of provider entries requested.

[out] entries

Type: FWPM_PROVIDER0***

Addresses of the enumeration entries.

[out] numEntriesReturned

Type: UINT32*

The number of provider objects returned.

Return value

Type: DWORD

Return code/value	Description
ERROR_SUCCESS 0	The providers 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.

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.

FwpmProviderEnum0 works on a snapshot of the providers taken at the time the enumeration handle was created.

FwpmProviderEnum0 is a specific implementation of FwpmProviderEnum. See WFP Version-Independent Names and Targeting Specific Versions of Windows for more information.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Target Platform	Windows
Header	fwpmu.h
Library	Fwpuclnt.lib
DLL	Fwpuclnt.dll