Re: [Libusb-devel] Receiving interrupt transfer packets

[Alan S. <st...@ro...>]

On Tue, 20 Jul 2010, Nikolai Kondrashov wrote:

> Hi everyone,
> 
> I'm implementing this tiny utility called hid-dump [1] and have a problem
> dumping HID reports. I'm quite new to USB so please excuse me if my
> assumptions are wrong.
> 
> The problem with report dumping is that you should know the expected size of
> the reports to display them timely (in order not to wait for the buffer to
> fill up). The problem is report descriptor parsing. I can do it, sure, but I
> think a simple dumping utility is no place for such things. This is
> aggravated by the possibility of variable size reports in the case report
> IDs are used (if I understood it correctly).
> 
> Thus I think that a simple interrupt transfer packet data dumping might be
> appropriate. However, I have a feeling it's not quite possible with libusb
> (at least portably) and that I would need to deal with usbfs myself.
> 
> Am I right, or is there still some way to do it with libusb? Or maybe there
> is some completely different way?

Why write your own utility?  Just use usbmon or wireshark.

Alan Stern