Build  
1) apt install libncurses-dev build-essential

Doc
  https://www.kernel.org/doc/html/latest/driver-api/usb/usb.html#c.urb
  https://www.kernel.org/doc/html/latest/driver-api/usb/URB.html

  How to use

  Vhci is controlled a user application throw vusb char driver.
  Char driver has major num = 42 and minor in range 0 to 5.
  
  sudo mknod /dev/vusb1 c 42 0    # for char driver need create a file
  sudo chmod go+rw /dev/vusb1     # for write operations into char driver

  ls -l /dev/vusb1                # see current file access