From: YenForYang <YenForYang@users.noreply.github.com>
Date: Tue, 14 Sep 2021 11:54:37 +0000 (-0500)
Subject: Optimize `LoopbackListenHost()` (#615)
X-Git-Tag: v1.32.0~62
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=be8b7b7d35b2eff9fd4d639b041448afe740bf20;p=btrtrc.git

Optimize `LoopbackListenHost()` (#615)
---

diff --git a/listen.go b/listen.go
index 29015c10..3840cc14 100644
--- a/listen.go
+++ b/listen.go
@@ -3,7 +3,7 @@ package torrent
 import "strings"
 
 func LoopbackListenHost(network string) string {
-	if strings.Contains(network, "4") {
+	if strings.IndexByte(network, '4') != -1 {
 		return "127.0.0.1"
 	} else {
 		return "::1"