nebula/overlay/tun_windows.go

60 lines
1.3 KiB
Go

//go:build !e2e_testing
// +build !e2e_testing
package overlay
import (
"fmt"
"net"
"os"
"path/filepath"
"runtime"
"syscall"
"github.com/sirupsen/logrus"
"github.com/slackhq/nebula/config"
)
func newTunFromFd(_ *config.C, _ *logrus.Logger, _ int, _ *net.IPNet) (Device, error) {
return nil, fmt.Errorf("newTunFromFd not supported in Windows")
}
func newTun(c *config.C, l *logrus.Logger, cidr *net.IPNet, multiqueue bool) (Device, error) {
useWintun := true
if err := checkWinTunExists(); err != nil {
l.WithError(err).Warn("Check Wintun driver failed, fallback to wintap driver")
useWintun = false
}
if useWintun {
device, err := newWinTun(c, l, cidr, multiqueue)
if err != nil {
return nil, fmt.Errorf("create Wintun interface failed, %w", err)
}
return device, nil
}
device, err := newWaterTun(c, l, cidr, multiqueue)
if err != nil {
return nil, fmt.Errorf("create wintap driver failed, %w", err)
}
return device, 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
}