52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
package openvpn
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/qdm12/gluetun/internal/constants"
|
|
"github.com/qdm12/gluetun/internal/unix"
|
|
)
|
|
|
|
// CheckTUN checks the tunnel device is present and accessible.
|
|
func (c *configurator) CheckTUN() error {
|
|
c.logger.Info("checking for device %s", constants.TunnelDevice)
|
|
f, err := c.os.OpenFile(string(constants.TunnelDevice), os.O_RDWR, 0)
|
|
if err != nil {
|
|
return fmt.Errorf("TUN device is not available: %w", err)
|
|
}
|
|
if err := f.Close(); err != nil {
|
|
c.logger.Warn("Could not close TUN device file: %s", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (c *configurator) CreateTUN() error {
|
|
c.logger.Info("creating %s", constants.TunnelDevice)
|
|
if err := c.os.MkdirAll("/dev/net", 0751); err != nil {
|
|
return err
|
|
}
|
|
|
|
const (
|
|
major = 10
|
|
minor = 200
|
|
)
|
|
dev := c.unix.Mkdev(major, minor)
|
|
if err := c.unix.Mknod(string(constants.TunnelDevice), unix.S_IFCHR, int(dev)); err != nil {
|
|
return err
|
|
}
|
|
|
|
const filepath = string(constants.TunnelDevice)
|
|
file, err := c.os.OpenFile(filepath, os.O_WRONLY, 0666)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
const readWriteAllPerms os.FileMode = 0666
|
|
if err := file.Chmod(readWriteAllPerms); err != nil {
|
|
_ = file.Close()
|
|
return err
|
|
}
|
|
|
|
return file.Close()
|
|
}
|