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tun: linux: account for interface removal from outside

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On Linux we can run `ip link del wg0`, in which case the fd becomes
stale, and we should exit. Since this is an intentional action, don't
treat it as an error.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
2021-05-20 18:26:01 +02:00
parent bd83f0ac99
commit 99e8b4ba60
2 changed files with 34 additions and 27 deletions
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6
device/send.go
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@@ -8,7 +8,9 @@ package device
import (
"bytes"
"encoding/binary"
"errors"
"net"
"os"
"sync"
"sync/atomic"
"time"
@@ -227,7 +229,9 @@ func (device *Device) RoutineReadFromTUN() {
if err != nil {
if !device.isClosed() {
device.log.Errorf("Failed to read packet from TUN device: %v", err)
if !errors.Is(err, os.ErrClosed) {
device.log.Errorf("Failed to read packet from TUN device: %v", err)
}
go device.Close()
}
device.PutMessageBuffer(elem.buffer)