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Re: Speed specific Link-Layer Header Types for USB 2.0


From: Tomasz Moń via tcpdump-workers <tcpdump-workers () lists tcpdump org>
Date: Tue, 10 May 2022 07:05:34 +0200

--- Begin Message --- From: Tomasz Moń <desowin () gmail com>
Date: Tue, 10 May 2022 07:05:34 +0200
On Tue, May 10, 2022 at 6:57 AM Guy Harris <gharris () sonic net> wrote:
On May 9, 2022, at 9:41 PM, Tomasz Moń <desowin () gmail com> wrote:
Also Wireshark would have to show "USB Full/Low speed capture" section with only the single byte denoting
full or low speed, followed by "USB Link Layer" (as shown currently for
usbll captures).

No, it wouldn't.  It would just display that as an item in "USB Link Layer".

If you displayed that in USB Link Layer, without marking it as
Wireshark generated field (and it shouldn't be marked as Wireshark
generated because it was in capture file) it would be confusing.
Currently everything that is shown under the USB Link Layer except the
clearly marked Wireshark-generated fields, are the actual contents of
what USB calls a packet.

--- End Message ---
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