MprConfigInterfaceTransportEnum

[This is preliminary documentation and subject to change.]

The MprConfigInterfaceTransportEnum function enumerates the transports configured on the specified interface.

DWORD  MprConfigInterfaceTransportEnum(
  HANDLE hMprConfig,           // handle to the router configuration
  HANDLE hRouterInterface,     // handle to the interface configuration
  DWORD dwLevel,               // level of information requested
  LPBYTE * lplpBuffer,         // array of MPR_IFTRANSPORT_0 structures
  DWORD dwPrefMaxLen,          // maximum length of data to return
  LPDWORD lpdwEntriesRead,     // number of entries enumerated
  LPDWORD lpdwTotalEntries,    // number of entries that could've
                               // been enumerated
  LPDWORD lpdwResumeHandle     // handle for continuing the enumeration
);

Parameters

hMprConfig

Handle to the router configuration. Obtain this handle by calling MprConfigServerConnect.

hRouterInterface

Handle to the interface configuration from which to enumerate the transports. Obtain this handle by calling MprConfigInterfaceCreate, or MprConfigInterfaceEnum.

dwLevel

Level of the information returned in the lplpBuffer parameter. This parameter must be zero.

lplpBuffer

Pointer to pointer variable. On successful return, this pointer variable will point to an array of MPR_IFTRANSPORT_0 structures This memory should be freed by calling MprConfigBufferFree.

dwPrefMaxLen

Specifies the preferred maximum length of returned data (in 8-bit bytes). If this parameter is -1, the buffer returned will be large enough to hold all available information.

lpdwEntriesRead

Pointer to a DWORD variable. On successful return, this variable contains the total number of entries that were enumerated from the current resume position.

lpdwTotalEntries

Pointer to a DWORD variable. On successful return, this variable contains the total number of entries that could have been enumerated from the current resume position.

lpdwResumeHandle

Pointer to a DWORD variable. On successful return, this variable contains a resume handle that can be used to continue the enumeration. The handle should be zero on the first call, and left unchanged on subsequent calls. If on return, the handle is NULL, the enumeration cannot be continued. For other types of error returns, this handle is invalid.

This parameter is optional. If the caller specifies NULL for this parameter, the function will not return a resume handle.

Return Values

NO_ERROR

The interface transports were enumerated successfully.

ERROR_INVALID_PARAMETER

One of the following is true:

hMprConfig is NULL.

HRouterInterface is NULL.

dwLevel is not zero.

lplpBuffer is NULL.

dwPrefMaxLen is smaller than the size of a single MPR_TRANSPORT_0 structure.

lpdwEntriesRead is NULL.

lpdwTotalEntries is NULL.

ERROR_NOT_ENOUGH_MEMORY

Insufficient resources to complete the operation.

ERROR_NO_MORE_ITEMS

No more entries available from the current resume position.

Other

Use FormatMessage to retrieve the system error message corresponding to the error code returned.

QuickInfo

  Windows NT: Use version 5.0 and later.
  Windows: Unsupported.
  Windows CE: Unsupported.
  Header: Declared in mprapi.h.
  Import Library: Link with mprapi.lib.

See Also

FormatMessage, MPR_IFTRANSPORT_0, MprConfigBufferFree, MprConfigInterfaceCreate, MprConfigInterfaceEnum, MprConfigInterfaceGetHandle