From 608bd97d7ba75e913e7a11c09c771add11c6d7d5 Mon Sep 17 00:00:00 2001
From: xtaci <daniel820313@gmail.com>
Date: Wed, 30 Sep 2020 15:26:09 +0800
Subject: [PATCH] use rwlock for sessions object

---
 sess.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sess.go b/sess.go
index 7bce126..cd02163 100644
--- a/sess.go
+++ b/sess.go
@@ -776,7 +776,7 @@ type (
 		ownConn      bool           // true if we created conn internally, false if provided by caller
 
 		sessions        map[string]*UDPSession // all sessions accepted by this Listener
-		sessionLock     sync.Mutex
+		sessionLock     sync.RWMutex
 		chAccepts       chan *UDPSession // Listen() backlog
 		chSessionClosed chan net.Addr    // session close queue
 		headerSize      int              // the additional header to a KCP frame
@@ -811,9 +811,9 @@ func (l *Listener) packetInput(data []byte, addr net.Addr) {
 	}
 
 	if dataValid {
-		l.sessionLock.Lock()
+		l.sessionLock.RLock()
 		s, ok := l.sessions[addr.String()]
-		l.sessionLock.Unlock()
+		l.sessionLock.RUnlock()
 
 		var conv, sn uint32
 		convValid := false