diff options
Diffstat (limited to 'tun/tun_linux.go')
| -rw-r--r-- | tun/tun_linux.go | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/tun/tun_linux.go b/tun/tun_linux.go index 466a805..1cc84cb 100644 --- a/tun/tun_linux.go +++ b/tun/tun_linux.go @@ -419,6 +419,7 @@ func CreateTUN(name string, mtu int) (Device, error) { var flags uint16 = unix.IFF_TUN // | unix.IFF_NO_PI (disabled for TUN status hack) nameBytes := []byte(name) if len(nameBytes) >= unix.IFNAMSIZ { + unix.Close(nfd) return nil, fmt.Errorf("interface name too long: %w", unix.ENAMETOOLONG) } copy(ifr[:], nameBytes) @@ -431,17 +432,19 @@ func CreateTUN(name string, mtu int) (Device, error) { uintptr(unsafe.Pointer(&ifr[0])), ) if errno != 0 { + unix.Close(nfd) return nil, errno } - err = unix.SetNonblock(nfd, true) - - // Note that the above -- open,ioctl,nonblock -- must happen prior to handing it to netpoll as below this line. - fd := os.NewFile(uintptr(nfd), cloneDevicePath) + err = unix.SetNonblock(nfd, true) if err != nil { + unix.Close(nfd) return nil, err } + // Note that the above -- open,ioctl,nonblock -- must happen prior to handing it to netpoll as below this line. + + fd := os.NewFile(uintptr(nfd), cloneDevicePath) return CreateTUNFromFile(fd, mtu) } |