From b439ca2c6635ff9de79628b9e7120e57764fd66c Mon Sep 17 00:00:00 2001
From: e1732a364fed <75717694+e1732a364fed@users.noreply.github.com>
Date: Sat, 1 Jan 2000 00:00:00 +0000
Subject: [PATCH] fdbased tun, close #227

---
 netLayer/tun/tun.go | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/netLayer/tun/tun.go b/netLayer/tun/tun.go
index 3a6a9c30..989a7865 100644
--- a/netLayer/tun/tun.go
+++ b/netLayer/tun/tun.go
@@ -19,7 +19,7 @@ import (
 	"io"
 	"log"
 	"net"
-	"runtime"
+	"strconv"
 	"time"
 
 	"github.com/e1732a364fed/v2ray_simple/netLayer"
@@ -40,18 +40,18 @@ import (
 	"gvisor.dev/gvisor/pkg/waiter"
 )
 
-// 若name为空则会返回错误
+// 若name为空则会返回错误. 若name可转换为数字，则会将其解析为fd 号
 func Open(name string) (device.Device, error) {
 	if name == "" {
 		return nil, errors.New("tun: dev name can't be empty")
 	}
 
-	if runtime.GOOS == "android" {
+	_, err := strconv.Atoi(name)
+	if err == nil {
 		return fdbased.Open(name, uint32(utils.MTU))
-
-	} else {
-		return tun.Open(name, uint32(utils.MTU))
 	}
+
+	return tun.Open(name, uint32(utils.MTU))
 }
 
 type StackCloser struct {