removed up check and header

tun/tun.go

@@ -5,19 +5,12 @@ import (
 	"io"
 	"log"
 	"mpbl3p/proxy"
-	"net"
 	"os"
-	"strings"
-	"sync"
-	"time"
 )
 
 type SourceSink struct {
 	tun wgtun.Device
 	mtu int
-
-	up   bool
-	upMu sync.Mutex
 }
 
 func NewTun(name string, mtu int) (t wgtun.Device, err error) {
@@ -34,46 +27,14 @@ func NewFromFile(fd uintptr, mtu int) (ss *SourceSink, err error) {
 	}
 
 	ss.mtu = mtu
-
-	ss.upMu.Lock()
-	go func() {
-		defer ss.upMu.Unlock()
-
-		for {
-			tunName, err := ss.tun.Name()
-			if err != nil {
-				panic(err)
-			}
-			iface, err := net.InterfaceByName(tunName)
-			if err != nil {
-				panic(err)
-			}
-
-			if strings.Contains(iface.Flags.String(), "up") {
-				log.Println("tun is up")
-				ss.up = true
-				return
-			}
-			time.Sleep(100 * time.Millisecond)
-		}
-	}()
-
 	return
 }
 
 func (t *SourceSink) Close() error {
-	t.upMu.Lock()
-	t.up = false
-
 	return t.tun.Close()
 }
 
 func (t *SourceSink) Source() (proxy.Packet, error) {
-	if !t.up {
-		t.upMu.Lock()
-		t.upMu.Unlock()
-	}
-
 	buf := make([]byte, t.mtu)
 
 	read, err := t.tun.Read(buf, 4)
@@ -85,17 +46,12 @@ func (t *SourceSink) Source() (proxy.Packet, error) {
 		return nil, io.EOF
 	}
 
-	return proxy.SimplePacket(buf[:read]), nil
+	return proxy.SimplePacket(buf[4:read]), nil
 }
 
 var good, bad float64
 
 func (t *SourceSink) Sink(packet proxy.Packet) error {
-	if !t.up {
-		t.upMu.Lock()
-		t.upMu.Unlock()
-	}
-
 	_, err := t.tun.Write(packet.Contents(), 4)
 	if err != nil {
 		switch err.(type) {