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/* SPDX-License-Identifier: Apache-2.0
*
* Copyright (C) 2017-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
package tun
import (
"golang.zx2c4.com/wireguard/rwcancel"
"os"
)
func CreateTUNFromFD(tunFd int) (TUNDevice, string, error) {
file := os.NewFile(uintptr(tunFd), "/dev/tun")
tun := &nativeTun{
tunFile: file,
fd: file.Fd(),
events: make(chan TUNEvent, 5),
errors: make(chan error, 5),
nopi: true,
}
var err error
tun.fdCancel, err = rwcancel.NewRWCancel(int(tun.fd))
if err != nil {
return nil, "", err
}
name, err := tun.Name()
if err != nil {
tun.fdCancel.Cancel()
return nil, "", err
}
return tun, name, nil
}
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