NET_BUFFER_DATA_OFFSET macro (ndis/nblaccessors.h)

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

#define NET_BUFFER_DATA_OFFSET(_NB) ((_NB)->DataOffset)

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

See also

NET_BUFFER