From 8c34c4cbb3780c433148966a004f5a51aace0f64 Mon Sep 17 00:00:00 2001
From: Mathias Hall-Andersen <mathias@hall-andersen.dk>
Date: Fri, 4 Aug 2017 16:15:53 +0200
Subject: First set of code review patches

---
 src/tun_linux.go | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/tun_linux.go')

diff --git a/src/tun_linux.go b/src/tun_linux.go
index 261d142..d0e2f47 100644
--- a/src/tun_linux.go
+++ b/src/tun_linux.go
@@ -7,6 +7,7 @@ import (
 	"encoding/binary"
 	"errors"
 	"golang.org/x/sys/unix"
+	"net"
 	"os"
 	"strings"
 	"unsafe"
@@ -19,6 +20,11 @@ type NativeTun struct {
 	name string
 }
 
+func (tun *NativeTun) IsUp() (bool, error) {
+	inter, err := net.InterfaceByName(tun.name)
+	return inter.Flags&net.FlagUp != 0, err
+}
+
 func (tun *NativeTun) Name() string {
 	return tun.name
 }
-- 
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