Move tun to subpackage

tun.go

@@ -7,30 +7,12 @@
 package main
 
 import (
-	"os"
+	"./tun"
 	"sync/atomic"
 )
 
 const DefaultMTU = 1420
 
-type TUNEvent int
-
-const (
-	TUNEventUp = 1 << iota
-	TUNEventDown
-	TUNEventMTUUpdate
-)
-
-type TUNDevice interface {
-	File() *os.File                 // returns the file descriptor of the device
-	Read([]byte, int) (int, error)  // read a packet from the device (without any additional headers)
-	Write([]byte, int) (int, error) // writes a packet to the device (without any additional headers)
-	MTU() (int, error)              // returns the MTU of the device
-	Name() (string, error)          // fetches and returns the current name
-	Events() chan TUNEvent          // returns a constant channel of events related to the device
-	Close() error                   // stops the device and closes the event channel
-}
-
 func (device *Device) RoutineTUNEventReader() {
 	setUp := false
 	logDebug := device.log.Debug
@@ -41,7 +23,7 @@ func (device *Device) RoutineTUNEventReader() {
 	device.state.starting.Done()
 
 	for event := range device.tun.device.Events() {
-		if event&TUNEventMTUUpdate != 0 {
+		if event&tun.TUNEventMTUUpdate != 0 {
 			mtu, err := device.tun.device.MTU()
 			old := atomic.LoadInt32(&device.tun.mtu)
 			if err != nil {
@@ -56,13 +38,13 @@ func (device *Device) RoutineTUNEventReader() {
 			}
 		}
 
-		if event&TUNEventUp != 0 && !setUp {
+		if event&tun.TUNEventUp != 0 && !setUp {
 			logInfo.Println("Interface set up")
 			setUp = true
 			device.Up()
 		}
 
-		if event&TUNEventDown != 0 && setUp {
+		if event&tun.TUNEventDown != 0 && setUp {
 			logInfo.Println("Interface set down")
 			setUp = false
 			device.Down()