NdisAllocateNetBufferList function

Call the NdisAllocateNetBufferList function to allocate and initialize a NET_BUFFER_LIST structure from a NET_BUFFER_LIST structure pool.

Syntax


PNET_BUFFER_LIST NdisAllocateNetBufferList(
  _In_  NDIS_HANDLE PoolHandle,
  _In_  USHORT ContextSize,
  _In_  USHORT ContextBackFill
);

Parameters

PoolHandle [in]

A NET_BUFFER_LIST structure pool handle that was previously returned from a call to NdisAllocateNetBufferListPool.

ContextSize [in]

The amount of used data space in the NET_BUFFER_LIST_CONTEXT structure to reserve for the caller. The ContextSize must be a multiple of the value defined by MEMORY_ALLOCATION_ALIGNMENT.

ContextBackFill [in]

The amount of unused data space (backfill space) that the caller requires. NDIS adds this value to the ContextSize and allocates additional space. The ContextBackFill must be a multiple of the value defined by MEMORY_ALLOCATION_ALIGNMENT.

Return value

NdisAllocateNetBufferList returns a pointer to the allocated NET_BUFFER_LIST structure. If the allocation was unsuccessful, this pointer is NULL.

Remarks

You can call the NdisAllocateNetBufferList or NdisAllocateNetBufferAndNetBufferList function to allocate a NET_BUFFER_LIST structure from a pool.

Note  NET_BUFFER and NET_BUFFER_LIST structures must be allocated from an NDIS buffer pool. A driver must not allocate and initialize a NET_BUFFER_LIST or NET_BUFFER structure from its private memory pool or the stack.

If you call NdisAllocateNetBufferList and the NET_BUFFER_LIST structure pool was allocated by calling the NdisAllocateNetBufferListPool function with the fAllocateNetBuffer member of the NET_BUFFER_LIST_POOL_PARAMETERS structure set to TRUE, NDIS allocates a NET_BUFFER_LIST, NET_BUFFER, MDL, and data.

Call the NdisFreeNetBufferList function to free a NET_BUFFER_LIST structure.

Requirements

Version

Supported in NDIS 6.0 and later.

Header

Ndis.h (include Ndis.h)

IRQL

<= DISPATCH_LEVEL

DDI compliance rules

Irql_NetBuffer_Function

See also

NdisAllocateNetBufferAndNetBufferList
NdisAllocateNetBufferListPool
NdisFreeNetBufferList
NET_BUFFER_LIST_POOL_PARAMETERS
NET_BUFFER
NET_BUFFER_LIST
NET_BUFFER_LIST_CONTEXT

 

 

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