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#11 Wrong transfert buffer size?

open
nobody
None
5
2005-04-19
2005-04-19
Benjamin Gerard
No

I am running snoopy pro on W2K pro.
I am not a expert in USB transfert but something looks
very strange to me. I have join a copy of the log in
this report.

Here is what seems suspicious to me:
Line 13: Sequence#3 SetupPacket finish by 3e 00 which
seems to be the size of the transfert buffer.
Line 24: Sequence#3 TransfertBuffer has a 002E size
that oes not match previous value (003e)

Analysing this TransfertBuffer shows more suspicious
things:
Line 25, first byte of transfert buffer (which seems to
be a block length) is 09. Since the transfert buffer is
2e (or 3e) bytes long others bloks should be analysed,
shouldn't they ?

After that sequence everything seems to be wrong. I
assumed it was because of the 2e/3e mess.

What do you think of this ? I may be completely wrong
since as I have laready written I am quiet rookie with
USB stuff. If it is the case please forgive me to waste
your time.

best regards,
Benjamin Gerard

Discussion

  • usblog that looks buggy to me.

     
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