added windows support over usbip-win2

internal/usbip/vhci_windows.go

@@ -2,25 +2,78 @@
 
 package usbip
 
-import "fmt"
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
 
+// FindUsbipExe locates the usbip.exe binary from usbip-win2.
+// Checks PATH first, then the standard installation directory.
+func FindUsbipExe() (string, error) {
+	// Check PATH
+	if path, err := exec.LookPath("usbip"); err == nil {
+		return path, nil
+	}
+
+	// Check standard installation path
+	standardPath := filepath.Join(os.Getenv("ProgramFiles"), "USBip", "usbip.exe")
+	if _, err := os.Stat(standardPath); err == nil {
+		return standardPath, nil
+	}
+
+	// Check x86 program files too
+	x86Path := filepath.Join(os.Getenv("ProgramFiles(x86)"), "USBip", "usbip.exe")
+	if _, err := os.Stat(x86Path); err == nil {
+		return x86Path, nil
+	}
+
+	return "", fmt.Errorf("usbip.exe nicht gefunden. Bitte usbip-win2 installieren: https://github.com/cezanne/usbip-win2/releases")
+}
+
+// IsVHCIAvailable checks if usbip-win2 is installed
 func IsVHCIAvailable() bool {
-	return false
+	_, err := FindUsbipExe()
+	return err == nil
 }
 
-// VHCIUnavailableError returns an error describing why VHCI is not available.
+// VHCIUnavailableError returns an error describing why VHCI is not available,
+// or nil if usbip-win2 is installed and ready.
 func VHCIUnavailableError() error {
-	return fmt.Errorf("VHCI wird unter Windows nicht unterstuetzt. Der Use-Modus (USB-Geraete empfangen) ist nur unter Linux verfuegbar")
-}
-
-func FindFreePort(speed uint32) (int, error) {
-	return -1, fmt.Errorf("VHCI not supported on Windows")
-}
-
-func AttachDevice(port int, sockfd int, devID uint32, speed uint32) error {
-	return fmt.Errorf("VHCI not supported on Windows")
+	if IsVHCIAvailable() {
+		return nil
+	}
+	return fmt.Errorf("usbip-win2 nicht installiert. Der Use-Modus benoetigt den usbip-win2 VHCI-Treiber. Download: https://github.com/cezanne/usbip-win2/releases")
 }
 
+// DetachDevice detaches a device from the VHCI driver using usbip.exe
 func DetachDevice(port int) error {
-	return fmt.Errorf("VHCI not supported on Windows")
+	usbipExe, err := FindUsbipExe()
+	if err != nil {
+		return err
+	}
+
+	cmd := exec.Command(usbipExe, "detach", "-p", fmt.Sprintf("%d", port))
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("usbip detach failed: %w (output: %s)", err, strings.TrimSpace(string(output)))
+	}
+
+	log.Printf("[vhci-win] detached port %d", port)
+	return nil
+}
+
+// FindFreePort is not used on Windows (usbip.exe selects the port automatically).
+// Signature required for cross-platform compilation.
+func FindFreePort(speed uint32) (int, error) {
+	return -1, fmt.Errorf("not used on Windows - usbip.exe selects port automatically")
+}
+
+// AttachDevice is not used on Windows (usbip.exe handles attachment).
+// Signature required for cross-platform compilation.
+func AttachDevice(port int, sockfd int, devID uint32, speed uint32) error {
+	return fmt.Errorf("not used on Windows - use createVHCIAttachment instead")
 }