diff options
| author | Michael Zeltner <m@niij.org> | 2019-07-17 23:04:01 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2019-07-18 10:25:20 +0200 |
| commit | 4d5819183e218e040fa0a73df560b4a4a9a768d7 (patch) | |
| tree | 02243d898e9f676b784c3c5bbe947d3fe2ff0c50 | |
| parent | 9ea9a921178fe6b0e1e823cea2cd73d654217b4c (diff) | |
tun: openbsd: don't change MTU when it's already the expected size
Allows for running wireguard-go as non-root user.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -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 |