世界
6a4ae5263e
Both the existing darwin backend and the upcoming windows backend drive USB devices from user space (IOUSBHost CGO calls vs. VBoxUSB IOCTLs). Refactor the per-attachment URB loop out of host_darwin.go into a platform-agnostic userspaceURBSession that talks to a URBEngine interface; the darwin-specific dispatch becomes a 30-line darwinIOUSBHostEngine. Linux's kernelHandoffSession is untouched. Move hex8 into shared.go and add usbipStatusEIO so the shared session does not depend on golang.org/x/sys/unix (Windows has no equivalent).
40 lines
1.4 KiB
Go
40 lines
1.4 KiB
Go
//go:build darwin && cgo
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package usbip
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// darwinIOUSBHostEngine drives one captured IOUSBHost device for the
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// duration of one USBIP attachment. The device handle itself is owned
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// by darwinExportHost (kept across attachments for re-capture), so
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// Close here is intentionally a no-op.
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type darwinIOUSBHostEngine struct {
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device *darwinUSBHostDevice
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}
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func newDarwinIOUSBHostEngine(device *darwinUSBHostDevice) *darwinIOUSBHostEngine {
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return &darwinIOUSBHostEngine{device: device}
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}
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func (e *darwinIOUSBHostEngine) Submit(req URBRequest) URBResponse {
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command := req.Command
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switch {
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case command.Header.Endpoint == 0:
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status, actual, outBuf, err := e.device.control(command.Setup, req.Buffer)
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return URBResponse{Status: status, ActualLength: actual, Buffer: outBuf, Error: err}
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case command.NumberOfPackets > 0:
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asap := command.TransferFlags&usbipTransferFlagIsoASAP != 0
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status, actual, outBuf, isoOut, err := e.device.iso(req.Endpoint, req.Buffer, command.StartFrame, asap, req.IsoPackets)
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return URBResponse{Status: status, ActualLength: actual, Buffer: outBuf, IsoPackets: isoOut, Error: err}
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default:
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status, actual, outBuf, err := e.device.io(req.Endpoint, req.Buffer)
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return URBResponse{Status: status, ActualLength: actual, Buffer: outBuf, Error: err}
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}
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}
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func (e *darwinIOUSBHostEngine) AbortEndpoint(endpoint uint8) error {
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return e.device.abortEndpoint(endpoint)
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}
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func (e *darwinIOUSBHostEngine) Close() error {
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return nil
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}
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