Hi Németh, I was doing something similar to this using USB/IP 0.1.6 - just from a few USB log files I created a device model for hardware (a USB handset) I do not own. However for my tests I eventually switched to a virtual environment as my system stopped responding rather frequently. I also experienced this problem connecting to a real device over the internet. So this is a possible solution, but might not be the best one. Regards, -Thomas References: USB/IP: http://sourceforge.net/projects/usbip/ My handset models: http://www.devbase.at/svn/view.cgi/phone-models/trunk/?root=experimental Discussions on this list: http://search.gmane.org/?query=usbip&group=gmane.linux.usb.general&sort=relevance Am Sonntag, den 04.01.2009, 14:46 +0100 schrieb Németh Márton: > Hi, > > I am currently working on a project to test video devices (webcams, > tuners, etc.) which using the V4L2 API ( http://v4l-test.sourceforge.net/ ). > > There are a lot of video devices which are connected to the computer > via USB. If I have a device available I can run the test against it. > Some problems are exists, for example it is not so easy to create > an automatic test which unplugs an USB device at a certain test step and > replugs it later. > > If a hardware device is not available the related software driver cannot > be tested either. > > I wonder if a software "USB loopback device" driver already exists, > similar to the "lo" device in networking. This device would show up > as a USB hardware device when it is asked to do so from the user > space. Then the user space "simulator" would receive all USB packets > which would normally be sent to the USB device and the "simulator" > could react and send USB packets in the other direction. > > Do you know about such a driver? If not, do you think that the USB > subsystem has a point or an interface where this can be implemented? > > Regards, > > Márton Németh > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
