[chirp_devel] Linux USB sniffing

[Ryan Fuller]

Hi Rich, I'm on mobile so no inline reply this time.

If you can copy/paste the TSV file to pastebin.com or similar place I can inspect the file and see what tidy is choking on.

As far as next steps go, it seems you are on the right track. Make a small change, get another radiotrace file and do a difference/comparison.

I have a regular expression I use (on my computer) that adds spaces in between the hex characters so graphical diff programs like Meld work better when they perform highlighting. I can pull that up if you (or anyone in chirp-devel) is interested.

Tony
________________________________
From: Richard Gordon <rich at lowswr.com>
Sent: Wednesday, March 4, 2020 7:01:45 PM
To: goldstar611 at hotmail.com <goldstar611 at hotmail.com>
Cc: chirp_devel at intrepid.danplanet.com <chirp_devel at intrepid.danplanet.com>
Subject: Re: [chirp_devel] Linux USB sniffing

Thanks for the reply Tony.
TShark version is 2.6.8.
Yes, I have to remove the space between the dash and the i in the start_trace command. I also have to 'sudo modprobe usbmon' and 'touch cap.pcap'  before starting.
(time goes by)
I was trying to capture a read from the radio. If I run tidy on this data to stdout I can see where the fault takes place in the tsv but I don't know why.
I had success sniffing a write to the radio and I now have a nice radiotrace file.
What is the next step? I will make some subtle changes and figure out how the memories are laid out.
Rich


On Tue, Mar 3, 2020 at 7:49 PM <goldstar611 at hotmail.com<mailto:goldstar611 at hotmail.com>> wrote:
Hi Rich,

I've added some thoughts in line.

Tony

On Tue, 2020-03-03 at 17:25 -0700, Richard Gordon via chirp_devel wrote:
> I really like Chirp and I thought I might try to help out with adding a new old radio.
> I recently bought a used Icom IC-V8 and I have a programming cable.
> Programming software runs fine under Wine.
> I followed the directions on the Linux USB sniffing page.
> I can capture fine and I end up with a cap.pcap file that is about 1 MB in size.
Did you have to update the start_trace.sh script and remove the space between the dash and the i? start_trace.sh didnt work for me until I did that
tshark - i usbmon$bus -w cap.pcap
vs
tshark -i usbmon$bus -w cap.pcap
> I can then run the first 2 commands in the clean script and end up with the capdev and capdev.tsv files.
> But when I try to run the tsv file through tidy, I get a segmentation fault but it does create an empty radiotrace.
Just ensuring that you are compiling tidy.c using the info at the wiki: https://chirp.danplanet.com/projects/chirp/wiki/DevelopersUSB_Sniffing_in_Linux
> Any ideas?
This doesn't help but I can reliably crash tidy with the non-tsv file so, maybe open up the TSV file in a text editor and ensure it "looks good"?

The c file is written with a pretty high expectation that the TSV file is perfect so I suspect the TSV file formatting.

What version of tshark are you using (tshark --version from a command line should be sufficient)
> Thanks,
> Rich Gordon k0eb
>
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