[libhid-discuss] Totally Stuck - Need Help Deciphering Log

[Christopher Moore]

Hello everyone,

I've spent the last 2 days trying to figure these out.  One is a Control
Transfer to the device , which returns a setup packet.  The setup packet I
understand, but I'm unsure as to what the request is.  The second is a
bulk/interrupt transfer.  I also think/know these are HID requests.

1)

[2268420 ms]  >>>  URB 9 going down  >>>
-- URB_FUNCTION_CLASS_INTERFACE:
  TransferFlags          = 00000000 (USBD_TRANSFER_DIRECTION_OUT,
~USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000009
  TransferBuffer       = 82764200
  TransferBufferMDL    = 00000000
    00000000: 04 c1 33 00 43 07 9a 4f 68
  UrbLink                 = 00000000
  RequestTypeReservedBits = 00000022
  Request                 = 00000009
  Value                   = 00000304
  Index                   = 00000003
[2268426 ms] UsbSnoop - MyInternalIOCTLCompletion(f5c81126) :
fido=827d3498, Irp=826293a8, Context=8255cbf0, IRQL=2
[2268427 ms]  <<<  URB 9 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 825616c8
  TransferFlags        = 0000000a (USBD_TRANSFER_DIRECTION_OUT,
USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000009
  TransferBuffer       = 82764200
  TransferBufferMDL    = 827c7d00
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 21 09 04 03 03 00 09 00

I believe this is a set idle request (0x0a). Should I even be concerned
with TransferBufferMDL: 04 c1 33 00 43 07 9a 4f 68 (from the going down
request) or am I driving myself crazy over nothing?

2)
[2253160 ms]  >>>  URB 7 going down  >>>
-- URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER:
  PipeHandle           = 8272e024 [endpoint 0x00000083]
  TransferFlags        = 00000003 (USBD_TRANSFER_DIRECTION_IN,
USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000008
  TransferBuffer       = 828fef00
  TransferBufferMDL    = 00000000
  UrbLink              = 00000000

[2268496 ms]  <<<  URB 7 coming back  <<<
-- URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER:
  PipeHandle           = 8272e024 [endpoint 0x00000083]
  TransferFlags        = 00000003 (USBD_TRANSFER_DIRECTION_IN,
USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000008
  TransferBuffer       = 828fef00
  TransferBufferMDL    = 8258e5d0
    00000000: 03 83 34 00 43 00 00 00
  UrbLink              = 00000000

This is a transfer to the HID endpoint (0x83) and appears to be either a
"report" or get_protocol (0x03).  Here, what does TransferBufferMDL: 03 83
34 00 43 00 00 00, mean ?

If these are setting reports... either to #3 or #4, they are alphanumeric
displays (14-segment according to the usage tables and have values between
0 and 255).  Reports #3 and #4 are 7 fields of 8 bits each and are
Input(Report #3) and Feature (Report #4)

If someone could please help, I would greatly appreciate it.  I've looked
forwards and backwards through the usb and hid pdf files and no table
seems to make sense with these values.

Attached is the rest of the log for reference.

Thanks

Christopher
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