repair pipe

lower/nic.go

@@ -2,7 +2,6 @@ package lower
 
 import (
 	"encoding/binary"
-	"io"
 	"os"
 	"os/exec"
 	"strconv"
@@ -50,7 +49,8 @@ func (nc *NIC) Start(m *link.Me) {
 	nc.hasstart = true
 	go func() { // 接收到 NIC
 		for nc.hasstart {
-			n, err := io.Copy(nc.ifce, m)
+			data := m.Read()
+			n, err := nc.ifce.Write(data)
 			if err != nil {
 				logrus.Errorln("[lower] recv write to nic err:", err)
 				break