mirror of
https://github.com/KusakabeShi/EtherGuard-VPN.git
synced 2024-12-26 15:48:47 +01:00
d840445e9b
We already track this state elsewhere. No need to duplicate. The cost of calling changeState is negligible. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
/* SPDX-License-Identifier: MIT
|
|
*
|
|
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
|
|
*/
|
|
|
|
package device
|
|
|
|
import (
|
|
"fmt"
|
|
"sync/atomic"
|
|
|
|
"golang.zx2c4.com/wireguard/tun"
|
|
)
|
|
|
|
const DefaultMTU = 1420
|
|
|
|
func (device *Device) RoutineTUNEventReader() {
|
|
device.log.Verbosef("Routine: event worker - started")
|
|
|
|
for event := range device.tun.device.Events() {
|
|
if event&tun.EventMTUUpdate != 0 {
|
|
mtu, err := device.tun.device.MTU()
|
|
if err != nil {
|
|
device.log.Errorf("Failed to load updated MTU of device: %v", err)
|
|
continue
|
|
}
|
|
if mtu < 0 {
|
|
device.log.Errorf("MTU not updated to negative value: %v", mtu)
|
|
continue
|
|
}
|
|
var tooLarge string
|
|
if mtu > MaxContentSize {
|
|
tooLarge = fmt.Sprintf(" (too large, capped at %v)", MaxContentSize)
|
|
mtu = MaxContentSize
|
|
}
|
|
old := atomic.SwapInt32(&device.tun.mtu, int32(mtu))
|
|
if int(old) != mtu {
|
|
device.log.Verbosef("MTU updated: %v%s", mtu, tooLarge)
|
|
}
|
|
}
|
|
|
|
if event&tun.EventUp != 0 {
|
|
device.log.Verbosef("Interface up requested")
|
|
device.Up()
|
|
}
|
|
|
|
if event&tun.EventDown != 0 {
|
|
device.log.Verbosef("Interface down requested")
|
|
device.Down()
|
|
}
|
|
}
|
|
|
|
device.log.Verbosef("Routine: event worker - stopped")
|
|
}
|