This crate (`usbip-sim`) is a vendored, trimmed copy of:

    usbip v0.8.0
    Copyright (c) Jiajie Chen <c@jia.je> and contributors
    https://github.com/jiegec/usbip
    Licensed under the MIT License.

Modifications by the punktfunk project:
  - Removed the USB host modules (`src/host.rs`) and the `rusb`/`nusb` device
    constructors in `src/lib.rs` (`with_rusb_*`, `with_nusb_*`, `new_from_host*`),
    eliminating the libusb runtime dependency (which also broke `musl`).
  - Removed the example helper interface handlers `src/cdc.rs` and `src/hid.rs`.
  - Replaced the `rusb::Direction` re-export and `rusb::Version` conversions with
    local definitions.
  - Dropped the in-crate test modules (kept the library surface only).
  - Paced interrupt/bulk IN endpoint transfers by bInterval in `device.rs`
    `handle_urb` (so a simulated interrupt-IN mimics a real device's
    NAK-until-bInterval behaviour rather than free-running over the loopback
    link); added the tokio `time` feature for it.

Only the USB/IP server *simulation* path is retained: the device model, the
USB/IP wire protocol, and the `UsbInterfaceHandler` trait. The original MIT
license text is reproduced in LICENSE-MIT.