Host

The host side drives a USB device instead of being one. It talks USB/IP itself, so it needs no kernel driver, no vhci and no root - serve a device in one process and drive it from another, on any OS. The device can be virtual (either library) or genuine hardware exported by a real usbipd.

Two ways in, from most to least code you write:

• Host driver - the native libusb-shaped API: open a device, run control/bulk/interrupt/iso transfers, or subclass a reusable Driver.
• pyusb - code already written against pyusb drives a virtual device by loading the C libusb wrapper as its backend.

In USB/IP terms this side is the client (which end is the server) - something must already be serving before any host call can succeed.