// 1394.h

typedef struct _TOPOLOGY_MAP {
  USHORT  TOP_Length;
  USHORT  TOP_CRC;
  ULONG   TOP_Generation;
  USHORT  TOP_Node_Count;
  USHORT  TOP_Self_ID_Count;
  SELF_ID TOP_Self_ID_Array[1];
} TOPOLOGY_MAP, *PTOPOLOGY_MAP;
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Windows Driver Kit DDI reference (ns-1394-_topology_map)

_TOPOLOGY_MAP structure

Description

The TOPOLOGY_MAP structure is used to store an IEEE 1394 bus topology map. The relations between devices are found in the port members of the entries in TOP_Self_ID_Array.

Members

`TOP_Length`

Specifies the length in quadlets of the topology map.

`TOP_CRC`

Specifies the CRC value for the topology map.

`TOP_Generation`

Specifies the bus reset generation for which the topology map was created.

`TOP_Node_Count`

Specifies the number of nodes in the topology map.

`TOP_Self_ID_Count`

Specifies the number of entries in TOP_Self_ID_Array.

`TOP_Self_ID_Array`

Pointer to an array of SELF_ID and SELF_ID_MORE structures (the two structures are the same size).

Remarks

All data will be in big-endian format.

TOPOLOGY_MAP - NtDoc