NET_BUFFER_DATA_OFFSET macro

NET_BUFFER_DATA_OFFSET is a macro that NDIS drivers use to get the current offset from the beginning of the data space to the start of the used data space in a NET_BUFFER structure.

Syntax


ULONG NET_BUFFER_DATA_OFFSET(
  PNET_BUFFER _NB
);

Parameters

_NB

A pointer to a NET_BUFFER structure.

Return value

NET_BUFFER_DATA_OFFSET returns the offset, in bytes, from the beginning of the data space to the start of the used data space of the indicated NET_BUFFER structure. This value also represents the size of the unused data space (available backfill).

Remarks

NET_BUFFER_DATA_OFFSET gets the return value from the DataOffset member of the NET_BUFFER structure.

Requirements

Version

Supported in NDIS 6.0 and later.

Header

Ndis.h (include Ndis.h)

See also

NET_BUFFER

 

 

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