Problem with USBIP

There's already a more general solution exists for device forwarding, USB/IP. However, there are several problems with USB/IP which has driven me to roll my own wheel.

1. No graceful handling of disconnect. If the receiving end dropped, user have to bind/unbind the forwarded device at the sending end to regain the ability of using that device.
2. USB/IP blocks suspension. User have to setup suspension hooks to attach/detach the device when suspending/resuming. This is error prone.
3. Race conditions when attaching/detaching multiple devices at the same time.
4. Exclusive. Device cannot be used when it's bound to USB/IP.
5. No authentication/encryption. Anyone one the network can grab/eavesdrop on the USB device.
6. Based on TCP. TCP is a poor fit for input devices, but because USB/IP has to support general USB devices, it has to use TCP to have the same level of data loss guarantee as USB.