Reverted event changes

This feature was not needed for Android, upon further inspection.

internal/events/event.go

@@ -1,36 +0,0 @@
-package events
-
-import (
-	"sync"
-)
-
-type Event interface {
-	Contains(int) bool
-	Processed()
-	WaitForProcessed()
-}
-
-type EventStruct struct {
-	code int
-	lock sync.Mutex
-}
-
-func (event EventStruct) Contains(code int) bool {
-	return event.code&code != 0
-}
-
-func (event *EventStruct) WaitForProcessed() {
-	event.lock.Lock()
-}
-
-func (event *EventStruct) Processed() {
-	event.lock.Unlock()
-}
-
-func NewEvent(code int) Event {
-	event := &EventStruct{
-		code: code,
-	}
-	event.lock.Lock()
-	return event
-}

tun.go

@@ -1,13 +1,14 @@
 package main
 
 import (
-	"git.zx2c4.com/wireguard-go/internal/events"
 	"os"
 	"sync/atomic"
 )
 
 const DefaultMTU = 1420
 
+type TUNEvent int
+
 const (
 	TUNEventUp = 1 << iota
 	TUNEventDown
@@ -20,7 +21,7 @@ type TUNDevice interface {
 	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                   // returns the current name
-	Events() chan events.Event      // returns a constant channel of events related to the device
+	Events() chan TUNEvent          // returns a constant channel of events related to the device
 	Close() error                   // stops the device and closes the event channel
 }
 
@@ -29,8 +30,7 @@ func (device *Device) RoutineTUNEventReader() {
 	logError := device.log.Error
 
 	for event := range device.tun.device.Events() {
-
+		if event&TUNEventMTUUpdate != 0 {
-		if event.Contains(TUNEventMTUUpdate) {
 			mtu, err := device.tun.device.MTU()
 			old := atomic.LoadInt32(&device.tun.mtu)
 			if err != nil {
@@ -45,16 +45,14 @@ func (device *Device) RoutineTUNEventReader() {
 			}
 		}
 
-		if event.Contains(TUNEventUp) && !device.isUp.Get() {
+		if event&TUNEventUp != 0 && !device.isUp.Get() {
 			logInfo.Println("Interface set up")
 			device.Up()
 		}
 
-		if event.Contains(TUNEventDown) && device.isUp.Get() {
+		if event&TUNEventDown != 0 && device.isUp.Get() {
 			logInfo.Println("Interface set down")
 			device.Down()
 		}
-
-		event.Processed()
 	}
 }

tun_linux.go

@@ -7,7 +7,6 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"git.zx2c4.com/wireguard-go/internal/events"
 	"golang.org/x/net/ipv6"
 	"golang.org/x/sys/unix"
 	"net"
@@ -56,7 +55,7 @@ type NativeTun struct {
 	index  int32         // if index
 	name   string        // name of interface
 	errors chan error    // async error handling
-	events chan events.Event // device related events
+	events chan TUNEvent // device related events
 }
 
 func (tun *NativeTun) File() *os.File {
@@ -72,9 +71,9 @@ func (tun *NativeTun) RoutineHackListener() {
 		_, err := unix.Write(fd, nil)
 		switch err {
 		case unix.EINVAL:
-			tun.events <- events.NewEvent(TUNEventUp)
+			tun.events <- TUNEventUp
 		case unix.EIO:
-			tun.events <- events.NewEvent(TUNEventDown)
+			tun.events <- TUNEventDown
 		default:
 		}
 		time.Sleep(time.Second / 10)
@@ -119,14 +118,14 @@ func (tun *NativeTun) RoutineNetlinkListener() {
 				}
 
 				if info.Flags&unix.IFF_RUNNING != 0 {
-					tun.events <- events.NewEvent(TUNEventUp)
+					tun.events <- TUNEventUp
 				}
 
 				if info.Flags&unix.IFF_RUNNING == 0 {
-					tun.events <- events.NewEvent(TUNEventDown)
+					tun.events <- TUNEventDown
 				}
 
-				tun.events <- events.NewEvent(TUNEventMTUUpdate)
+				tun.events <- TUNEventMTUUpdate
 
 			default:
 				remain = remain[hdr.Len:]
@@ -289,7 +288,7 @@ func (tun *NativeTun) Read(buff []byte, offset int) (int, error) {
 	}
 }
 
-func (tun *NativeTun) Events() chan events.Event {
+func (tun *NativeTun) Events() chan TUNEvent {
 	return tun.events
 }
 
@@ -301,7 +300,7 @@ func CreateTUNFromFile(name string, fd *os.File) (TUNDevice, error) {
 	device := &NativeTun{
 		fd:     fd,
 		name:   name,
-		events: make(chan events.Event, 5),
+		events: make(chan TUNEvent, 5),
 		errors: make(chan error, 5),
 	}
 
@@ -358,7 +357,7 @@ func CreateTUN(name string) (TUNDevice, error) {
 	device := &NativeTun{
 		fd:     fd,
 		name:   newName,
-		events: make(chan events.Event, 5),
+		events: make(chan TUNEvent, 5),
 		errors: make(chan error, 5),
 	}