From abd287159e7eb7d20ee46c03d1a8cb9a645735e4 Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Fri, 28 Feb 2020 08:53:29 -0800
Subject: [PATCH] tun: remove unused isUp method

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
---
 tun/tun_linux.go | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/tun/tun_linux.go b/tun/tun_linux.go
index 7ab0623..17b8822 100644
--- a/tun/tun_linux.go
+++ b/tun/tun_linux.go
@@ -12,7 +12,6 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"net"
 	"os"
 	"sync"
 	"syscall"
@@ -164,11 +163,6 @@ func (tun *NativeTun) routineNetlinkListener() {
 	}
 }
 
-func (tun *NativeTun) isUp() (bool, error) {
-	inter, err := net.InterfaceByName(tun.name)
-	return inter.Flags&net.FlagUp != 0, err
-}
-
 func getIFIndex(name string) (int32, error) {
 	fd, err := unix.Socket(
 		unix.AF_INET,