39 lines
629 B
Go
39 lines
629 B
Go
|
package tun
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"fmt"
|
||
|
|
"os"
|
||
|
|
"path/filepath"
|
||
|
|
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Creator interface {
|
||
|
|
Create(path string) error
|
||
|
|
}
|
||
|
|
|
||
|
|
var (
|
||
|
|
ErrMknod = errors.New("cannot create TUN device file node")
|
||
|
|
)
|
||
|
|
|
||
|
|
// Create creates a TUN device at the path specified.
|
||
|
|
func (t *Tun) Create(path string) error {
|
||
|
|
parentDir := filepath.Dir(path)
|
||
|
|
if err := os.MkdirAll(parentDir, 0751); err != nil { //nolint:gomnd
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
const (
|
||
|
|
major = 10
|
||
|
|
minor = 200
|
||
|
|
)
|
||
|
|
dev := unix.Mkdev(major, minor)
|
||
|
|
err := t.mknod(path, unix.S_IFCHR, int(dev))
|
||
|
|
if err != nil {
|
||
|
|
return fmt.Errorf("%w: %s", ErrMknod, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|