GSoC Week 6-8, add usbdump file-format to Wireshark

[Hans Petter Selasky]

On 07/25/17 04:36, Jie Weng wrote:
> Hi everyone,
> 
> I'm really sorry for the late status updates.
> 
> In the first week I fixed several crashes when opening files in which the
> length of some packets is a little longer. It was caused by a wrongly
> explicit cast, the cast shorten the proper length it should be. Besides, I
> was diving into learning the Epan lib of Wireshark to make ready for
> dissection phase.
> 
> In the second week I register the usbdump file format to FreeBSD USB
> encapsulation of Wireshark. The built-in dissectors can dissect the urb
> part for each packet, but it does nothing about the frames and payloads.
> 
> Last week I was mainly focus on dissecting usbdump packets. I reused a lot
> of built-in dissectors. These dissectors cannot be called directly since
> the built-in FreeBSD USB dissector didn't offer enough information, so I
> added many content to the built-in dissectors to collect necessary
> information, the information is also needed for identifying the kind of
> each packet and constructing important data structures. Currently I
> finished the control transfers dissection, but it's still not 100%
> functional. I think this is due to that I'm not classifying each packet
> properly. This faultiness also infects the other dissection phases.
> 
> The code is at
> https://github.com/jerrywossion/wireshark/tree/usbdump_dissector. I make a
> new branch for current work, and I will clean the code and merge it when
> dissection phase is completed.
> 

Hi,

Thank you for the work you are doing. I hope this project will help 
diagnose USB problems under FreeBSD more easily.

--HPS