mirror of
https://github.com/KusakabeShi/EtherGuard-VPN.git
synced 2024-11-22 23:33:09 +01:00
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
/* SPDX-License-Identifier: GPL-2.0
|
|
*
|
|
* Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
|
* Copyright (C) 2017-2018 Mathias N. Hall-Andersen <mathias@hall-andersen.dk>.
|
|
*/
|
|
|
|
package main
|
|
|
|
import (
|
|
"./tun"
|
|
"sync/atomic"
|
|
)
|
|
|
|
const DefaultMTU = 1420
|
|
|
|
func (device *Device) RoutineTUNEventReader() {
|
|
setUp := false
|
|
logDebug := device.log.Debug
|
|
logInfo := device.log.Info
|
|
logError := device.log.Error
|
|
|
|
logDebug.Println("Routine: event worker - started")
|
|
device.state.starting.Done()
|
|
|
|
for event := range device.tun.device.Events() {
|
|
if event&tun.TUNEventMTUUpdate != 0 {
|
|
mtu, err := device.tun.device.MTU()
|
|
old := atomic.LoadInt32(&device.tun.mtu)
|
|
if err != nil {
|
|
logError.Println("Failed to load updated MTU of device:", err)
|
|
} else if int(old) != mtu {
|
|
if mtu+MessageTransportSize > MaxMessageSize {
|
|
logInfo.Println("MTU updated:", mtu, "(too large)")
|
|
} else {
|
|
logInfo.Println("MTU updated:", mtu)
|
|
}
|
|
atomic.StoreInt32(&device.tun.mtu, int32(mtu))
|
|
}
|
|
}
|
|
|
|
if event&tun.TUNEventUp != 0 && !setUp {
|
|
logInfo.Println("Interface set up")
|
|
setUp = true
|
|
device.Up()
|
|
}
|
|
|
|
if event&tun.TUNEventDown != 0 && setUp {
|
|
logInfo.Println("Interface set down")
|
|
setUp = false
|
|
device.Down()
|
|
}
|
|
}
|
|
|
|
logDebug.Println("Routine: event worker - stopped")
|
|
device.state.stopping.Done()
|
|
}
|