From cdaacdcfed754ef6be6dfb2df7c60fbd5e54427e Mon Sep 17 00:00:00 2001
From: fumiama <s862105088@gmail.com>
Date: Sat, 1 Jan 2022 17:52:14 +0800
Subject: [PATCH] fix out of bound

---
 gold/link/me.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gold/link/me.go b/gold/link/me.go
index b64acb6..0f7e720 100644
--- a/gold/link/me.go
+++ b/gold/link/me.go
@@ -163,7 +163,7 @@ func (m *Me) sendAllSameDst(packet []byte) (n int, rem []byte) {
 			n += pktl
 			rem = packet[n:]
 		}
-		if !waterutil.IsIPv4(rem) {
+		if len(rem) == 0 || !waterutil.IsIPv4(rem) {
 			logrus.Warnln("[me] skip to send", len(rem), "bytes non-ipv4/v6 packet")
 			return len(packet), nil
 		}