diff options
| -rw-r--r-- | tun/tun_openbsd.go | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/tun/tun_openbsd.go b/tun/tun_openbsd.go index 1e6191f..bbc0432 100644 --- a/tun/tun_openbsd.go +++ b/tun/tun_openbsd.go @@ -173,10 +173,13 @@ func CreateTUNFromFile(file *os.File, mtu int) (Device, error) { go tun.routineRouteListener(tunIfindex) - err = tun.setMTU(mtu) - if err != nil { - tun.Close() - return nil, err + currentMTU, err := tun.MTU() + if err != nil || currentMTU != mtu { + err = tun.setMTU(mtu) + if err != nil { + tun.Close() + return nil, err + } } return tun, nil |