Re: [Ethereal-dev] Re: Getting signal from USB port

[Guy Harris <gharris@xxxxxxxxx>]

hasna dahnini wrote:

> I've yet developed a Profibus dissector that is able to analyse Profibus 
> signals stored in a file. Now, I want to think on the link between an 
> hard system that gets the signals on a real network and send them into a 
> PC through a USB port. Moreover, my hard system will work with different 
> network protocols and not only Profibus. Therefore, I choose Ethereal as 
> network analyser. And, I don't know how I can get signals on my PC !

I can't help you on the issue of how to get the Profibus signals over 
the USB bus to your PC; Ethereal doesn't have any code that does 
capturing directly, it relies on libpcap/WinPcap, and the OS/driver code 
libpcap/WinPcap uses, to do that.

If you have a file format for the Profibus signals, you'd have to write 
code for Ethereal to read those files in the Wiretap library (in the 
"wiretap" subdirectory - I'd suggest that you arrange that the Profibus 
files have a "magic number" at the beginning, so that Wiretap can easily 
determine the type of the file), define a Wiretap encapsulation type for 
Profibus, and add Ethereal dissector code that registers for that 
encapsulation type.