From ba37b0e02b48906d0f2903eedd30c8ce0067b1a7 Mon Sep 17 00:00:00 2001
From: Marten Seemann <martenseemann@gmail.com>
Date: Fri, 6 Nov 2020 17:09:21 +0700
Subject: [PATCH] replace the RWMutex with a Mutex in the packet handler map

---
 packet_handler_map.go | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/packet_handler_map.go b/packet_handler_map.go
index a458ee98..ae542e59 100644
--- a/packet_handler_map.go
+++ b/packet_handler_map.go
@@ -30,7 +30,7 @@ func (e statelessResetErr) Error() string {
 // * by the server to store sessions
 // * when multiplexing outgoing connections to store clients
 type packetHandlerMap struct {
-	mutex sync.RWMutex
+	mutex sync.Mutex
 
 	conn      connection
 	connIDLen int
@@ -320,16 +320,14 @@ func (h *packetHandlerMap) handlePacket(p *receivedPacket) {
 		return
 	}
 
-	h.mutex.RLock()
-	defer h.mutex.RUnlock()
+	h.mutex.Lock()
+	defer h.mutex.Unlock()
 
 	if isStatelessReset := h.maybeHandleStatelessReset(p.data); isStatelessReset {
 		return
 	}
 
-	handler, handlerFound := h.handlers[string(connID)]
-
-	if handlerFound { // existing session
+	if handler, ok := h.handlers[string(connID)]; ok { // existing session
 		handler.handlePacket(p)
 		return
 	}