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!ndiskd.nb

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The !ndiskd.nb extension displays information about a NET_BUFFER (NB) structure.

!ndiskd.nb [-handle <x>] [-verbosity <x>] [-basic] [-chain] [-data]

Parameters

-handle
Required. Address of a NET_BUFFER structure.

-verbosity
Level of detail to display.

-basic
Displays basic information about an NB.

-chain
Displays all the MDLs associated with an NB.

-data
Dumps the actual data payload of an NB.

DLL

Ndiskd.dll

Examples

The NET_BUFFER in the following examples was obtained from the NET_BUFFER_LIST in the Examples section of the !ndiskd.nbl topic. The NB's handle is ffffdf8014952610.

2: kd> !ndiskd.nbl ffffdf80149524a0 -data
NET_BUFFER ffffdf8014952610

You can click the NET_BUFFER's handle or run the !ndiskd.nb -handle command to see its details.

2: kd> !ndiskd.nb ffffdf8014952610
    NB                 ffffdf8014952610    Next NB            0
    Length             0                   Source pool        ffffdf80147e4a40
    First MDL          ffffdf8014a37930    DataOffset         0
    Current MDL        [First MDL]         Current MDL offset 0

    View associated NBL

Use the !ndiskd.nb -chain command to see this NET_BUFFER's MDL chain in addition to its basic details. In the following example, there is only one MDL. Its handle is ffffdf8014a37930.

2: kd> !ndiskd.nb ffffdf8014952610 -chain
    NB                 ffffdf8014952610    Next NB            0
    Length             0                   Source pool        ffffdf80147e4a40
    First MDL          ffffdf8014a37930    DataOffset         0
    Current MDL        [First MDL]         Current MDL offset 0
        MDL [current]      ffffdf8014a37930    MDL Flags             c
        MappedSystemVa     ffffdf8014bf0024    ByteCount          0n1514
        Process            [System process]    ByteOffset         0n36

See also

Network Driver Design Guide

Windows Vista and Later Networking Reference

Debugging the Network Stack

NDIS extensions (Ndiskd.dll)

!ndiskd.help

NET_BUFFER

NET_BUFFER_LIST

!ndiskd.nbl