From 8b1e2ba0fa733000dff446d6fe17b2ad00fe1943 Mon Sep 17 00:00:00 2001
From: wuxingzhong <330332812@qq.com>
Date: Thu, 8 Aug 2019 16:13:39 +0800
Subject: [PATCH] judge if interface is up

---
 pkg/net/ip/ip.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkg/net/ip/ip.go b/pkg/net/ip/ip.go
index 54e241d1a..386d7e23f 100644
--- a/pkg/net/ip/ip.go
+++ b/pkg/net/ip/ip.go
@@ -48,6 +48,9 @@ func InternalIP() string {
 		return ""
 	}
 	for _, inter := range inters {
+		if !isUp(inter.Flags) {
+			continue
+		}
 		if !strings.HasPrefix(inter.Name, "lo") {
 			addrs, err := inter.Addrs()
 			if err != nil {
@@ -64,3 +67,8 @@ func InternalIP() string {
 	}
 	return ""
 }
+
+// isUp Interface is up 
+func isUp(v net.Flags) bool {
+	 return v&net.FlagUp == net.FlagUp 
+}