DLL prototype issue for loading PCAP File

[billko]

Great news!

[PalanivelThiruvenkadam]

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@TenJigoku77 wrote:

Hi guys !

I'm happy to announce you that the solution with tshark is working fine.
I didn't finalize my application but it is well on track.

So I launch tshark from "system exec.vi" and I execute severals command line to : 

1) Select the interface

2) Acquire frames during a specified amoung of time, or after n packets acquired

3) Store those data in a pcap file

4) Read the pcap file and extract data as a json or xml file

I even succeed in selecting the correct channel for my zigbee network by re-writting the correct file.

Idem for the zigbee network key.

Anyway thanks guys for your help, you changed my week ^^

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I have a similar requirement of Capturing the UDP data Frame Data )and Saving the same as pcap file and load/replay  back the saved pcap file in LabVIEW UI.

Please share the one you have tried to check whether that suits my requirement

[TenJigoku77]

Hi !
I used the following command line :

the description of the command lines elements can be found here :
https://www.wireshark.org/docs/man-pages/tshark.html

I chosed to save the data as a json file, in order to read the data later with a labview thread, and as a pcap to be able to read the data back with wireshark if needed.
After that I needed to extract all the desired data from the json file. It's here that I spent a lot of time ^^'

[PalanivelThiruvenkadam]

Thanks for the response, I will try based on the suggestion.

What does the sub vi does, does it logs the data. If yes how?

Thanks a million.

[TenJigoku77]

Hi !
This sub vi starts tshark, and then tshark will log acquire data and log them as specified in the command line.
In this command line, for example I specified the path file and the extension (pcap and json).
So technically it's tshark that does all the work, this sub vi just call tshark. 

[cubedcheese]

Hi!

How do you stop the tshark capture?  Do you send a Ctrl-C command through the system exec?

Thanks!

[billko]

I think you have two options.  The first is to configure tshark to run for a certain amount of time and then it exits by itself.  The other is to kill it from the taskkill command (from a new prompt).