nebula/overlay/tun_windows.go

75 lines
1.7 KiB
Go

//go:build !e2e_testing
// +build !e2e_testing
package overlay
import (
"fmt"
"io"
"net"
"os"
"path/filepath"
"runtime"
"syscall"
"github.com/sirupsen/logrus"
)
type Tun struct {
Device
}
func newTunFromFd(l *logrus.Logger, deviceFd int, cidr *net.IPNet, defaultMTU int, routes []Route, unsafeRoutes []Route, txQueueLen int) (ifce *Tun, err error) {
return nil, fmt.Errorf("newTunFromFd not supported in Windows")
}
func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, routes []Route, unsafeRoutes []Route, txQueueLen int, multiqueue bool) (ifce *Tun, err error) {
if len(routes) > 0 {
return nil, fmt.Errorf("route MTU not supported in Windows")
}
useWintun := true
if err = checkWinTunExists(); err != nil {
l.WithError(err).Warn("Check Wintun driver failed, fallback to wintap driver")
useWintun = false
}
var inside Device
if useWintun {
inside, err = newWinTun(deviceName, cidr, defaultMTU, unsafeRoutes, txQueueLen)
if err != nil {
return nil, fmt.Errorf("Create Wintun interface failed, %w", err)
}
} else {
inside, err = newWindowsWaterTun(deviceName, cidr, defaultMTU, unsafeRoutes, txQueueLen)
if err != nil {
return nil, fmt.Errorf("Create wintap driver failed, %w", err)
}
}
return &Tun{
Device: inside,
}, nil
}
func checkWinTunExists() error {
myPath, err := os.Executable()
if err != nil {
return err
}
arch := runtime.GOARCH
switch arch {
case "386":
//NOTE: wintun bundles 386 as x86
arch = "x86"
}
_, err = syscall.LoadDLL(filepath.Join(filepath.Dir(myPath), "dist", "windows", "wintun", "bin", arch, "wintun.dll"))
return err
}
func (t *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
return nil, fmt.Errorf("TODO: multiqueue not implemented for windows")
}