From bdaf81e88e51a7b8090c04ed399054b178cacc78 Mon Sep 17 00:00:00 2001
From: xtaci <daniel820313@gmail.com>
Date: Fri, 9 Oct 2020 22:38:31 +0800
Subject: [PATCH] add loc

---
 sess.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sess.go b/sess.go
index 7af2a0e..dc693a0 100644
--- a/sess.go
+++ b/sess.go
@@ -814,12 +814,14 @@ func (l *Listener) packetInput(data []byte, addr net.Addr) {
 		convRecovered := false
 		fecFlag := binary.LittleEndian.Uint16(data[4:])
 		if fecFlag == typeData || fecFlag == typeParity { // 16bit kcp cmd [81-84] and frg [0-255] will not overlap with FEC type 0x00f1 0x00f2
+			// packet with FEC
 			if fecFlag == typeData && len(data) >= fecHeaderSizePlus2+IKCP_OVERHEAD {
 				conv = binary.LittleEndian.Uint32(data[fecHeaderSizePlus2:])
 				sn = binary.LittleEndian.Uint32(data[fecHeaderSizePlus2+IKCP_SN_OFFSET:])
 				convRecovered = true
 			}
 		} else {
+			// packet without FEC
 			conv = binary.LittleEndian.Uint32(data)
 			sn = binary.LittleEndian.Uint32(data[IKCP_SN_OFFSET:])
 			convRecovered = true