Add USB packet capture

[dorssel]

No description provided.

[codecov]

Codecov Report

Merging #242 (14c7a51) into master (00c08d8) will increase coverage by 7.34%.
The diff coverage is 90.06%.

@@            Coverage Diff             @@
##           master     #242      +/-   ##
==========================================
+ Coverage   32.69%   40.03%   +7.34%     
==========================================
  Files          27       28       +1     
  Lines        2083     2358     +275     
==========================================
+ Hits          681      944     +263     
- Misses       1402     1414      +12     

Impacted Files	Coverage Δ
UsbIpServer/AttachedClient.cs	0.00% <0.00%> (ø)
UsbIpServer/CommandHandlers.cs	0.00% <ø> (ø)
UsbIpServer/ConnectedClient.cs	0.00% <ø> (ø)
UsbIpServer/Server.cs	0.00% <0.00%> (ø)
UsbIpServer/PcapNg.cs	94.46% <94.46%> (ø)
UsbIpServer/Tools.cs	100.00% <100.00%> (ø)

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[vmarrazz]

Hi @dorssel
I have found usbipd a powerful tool for my testing activity for a device connected via "USB to serial" converter.

I have some question on this feature/PR:

• Where is possible to find a description of this feature/PR?
• Does it allow to capture messages exchanged without any interference with application running into WSL2?

Regards
Vincenzo

[dorssel]

@vmarrazz

• No description yet. This PR is still in draft and probably not functional. It doesn't even have the latest commits due to lack of time.
• Yes, it eventually will.

For the time being, you can achieve (nearly) the same by using tcpdump or tshark on /dev/usbmon on the Linux side of things, but for WSL that would mean compiling your own kernel with support for usbmon.

[vmarrazz]

@dorssel thanks for feedback
Do you have a guide to compile kernel specific for WSL2?

Regards

[dorssel]

@vmarrazz
Other than https://github.com/dorssel/usbipd-win/wiki/WSL-support? No. You probably will have to enable some CONFIG_XXX referring to usbmon, but I have no clue which one.

[vmarrazz]

Thank you @dorssel

The WSL-support link provide me all necessary information to compile kernel for WSL.
Other information I need was related usbmon capture but Wireshark/tshark has many wiki about it ;-)

Regards