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
