NdisCreateLookaheadBufferFromSharedMemory function
Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.
NdisCreateLookaheadBufferFromSharedMemory returns the virtual address of a buffer within a block of memory shared with a bus-master DMA NIC.
Syntax
VOID NdisCreateLookaheadBufferFromSharedMemory(
_In_ PVOID pSharedMemory,
_In_ UINT LookaheadLength,
_Out_ PVOID *pLookaheadBuffer
);
Parameters
pSharedMemory [in]
Specifies the base address of the shared memory range containing the data for the lookahead buffer.LookaheadLength [in]
Specifies the length in bytes for the lookahead buffer.pLookaheadBuffer [out]
Pointer to a caller-supplied variable in which this function returns the virtual address of the lookahead buffer.
Return value
None
Remarks
NdisCreateLookaheadBufferFromSharedMemory provides a lookahead buffer that is a virtual memory copy of shared memory for miniport driver receive indications. To bound protocol drivers, such a lookahead buffer represents a read-only version of the shared memory.
This function accommodates system architectures that do not allow the NIC driver to read shared memory on a network interface card directly.
Requirements
Target platform |
Desktop |
Version |
Not supported for NDIS 6.0 drivers in Windows Vista. Supported for NDIS 5.1 drivers in Windows Vista and Windows XP. |
Header |
Ndis.h (include Ndis.h) |
IRQL |
Any level |
See also
NdisDestroyLookaheadBufferFromSharedMemory