Re: [Libusb-devel] Converting Win32 code to libusb

[Xiaofan C. <xia...@gm...>]

On Thu, Jun 30, 2011 at 7:45 AM, Xiaofan Chen <xia...@gm...> wrote:
> On Thursday, June 30, 2011, Yann Renard
> <yan...@al...> wrote:
>> I am on the process of porting some Win32 code to libusb under Linux.
>> The Win32 code basically uses CreateFile to open the device, followed by
>> DeviceIOControl / ReadFile calls to configure / request / read the device.
>>
>> I'm stuck with the DeviceIOControl calls which, I believe, should be
>> mapped to libusb_control_transfer.
>
> No, unfortunately it is not that simple. The device must have a driver
> under Windows. The ioctl is one of the ways that your user space
> program communicates with the kernel driver. If you do not know the
> protocol of the device, then you may have to do reverse engineering by
> using USB sniffers under Windows.
>

Just for your information, here is the MSDN info on IOCTL.
http://msdn.microsoft.com/en-us/library/aa363219%28v=vs.85%29.aspx

If you have a hardware USB analyzer, then it will make things easier as well.
Eg: http://www.ladyada.net/learn/diykinect/

You can also using a Windows VM under Linux and then try to use
usbmon.
http://www.mjmwired.net/kernel/Documentation/usb/usbmon.txt
http://people.redhat.com/zaitcev/linux/

As for Software only USB Sniffer Under Windows, you can try out the following.
Windows 7 only, quite good:
http://blogs.msdn.com/b/usbcoreblog/archive/2009/12/04/etw-in-the-windows-7-usb-core-stack.aspx
http://blogs.msdn.com/usbcoreblog/archive/2010/02/05/how-to-generate-and-view-a-winusb-debug-trace-log.aspx

32/64bit XP and above (you may need to disable code signing for
64bit Vista/7),relatively new.
http://code.google.com/p/busdog/

Relatively old, 32/64bit XP only:
http://www.pcausa.com/Utilities/UsbSnoop/

Old, 32bit XP or lower, may work for 32bit Vista/Win7, YMMV.
http://sourceforge.net/projects/usbsnoop/

Or you can use trial version of commercial USB Sniffer for Windows.
Eg: http://www.makestuff.eu/wordpress/?p=985
http://www.sysnucleus.com/usbtrace_download.html
http://www.usblyzer.com/
http://www.sourcequest.com/
http://www.perisoft.net/bushound/
http://www.hhdsoftware.com/Products/home/usb-monitor.html
http://www.aggsoft.com/usb-port-monitor.htm



-- 
Xiaofan