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 x has been deprecated and is superseded by NDIS 6.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.
NdisQueryBuffer retrieves the size of the range, and optionally the base virtual address, from a buffer descriptor.
VOID NdisQueryBuffer( _In_ PNDIS_BUFFER Buffer, _Out_opt_ PVOID *VirtualAddress, _Out_ PUINT Length );
- Buffer [in]
Pointer to the buffer descriptor.
- VirtualAddress [out, optional]
Pointer to a caller-supplied variable in which this function returns the base virtual address of the range described.
- Length [out]
Pointer to to a caller-supplied variable in which this function returns the number of bytes in the virtual range.
Drivers should call NdisQueryBufferSafe instead of NdisQueryBuffer. NDIS 5.1 miniport drivers must call NdisQueryBufferSafe instead of NdisQueryBuffer. Unlike NdisQueryBuffer, NdisQueryBufferSafe does not cause a bug check if system resources are low or exhausted.
NDIS drivers call NdisQueryBuffer to retrieve information from the buffer descriptors chained to incoming packets for subsequent transfer operations.
The driver must release any spin lock it is holding before calling NdisQueryBuffer.
|Not supported for NDIS 6.0 drivers in Windows Vista. Use NdisQueryMdlinstead. Supported for NDIS 5.1 drivers in Windows Vista and Windows XP. Use NdisQueryBufferSafeinstead.|