From 5a61fca55aaabf08585ad64542b3da789415662a Mon Sep 17 00:00:00 2001
From: Wiebe Cazemier <wiebe@halfgaar.net>
Date: Mon, 20 May 2024 11:59:44 +1000
Subject: [PATCH] Use string of reason code in connack failure

---
 mqttpacket.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mqttpacket.cpp b/mqttpacket.cpp
index 16f9232..b78a9d3 100644
--- a/mqttpacket.cpp
+++ b/mqttpacket.cpp
@@ -1135,7 +1135,8 @@ void MqttPacket::handleConnAck()
 
     if (data.reasonCode != ReasonCodes::Success)
     {
-        throw std::runtime_error(formatString("Client '%s' connection failed. Reason code: %d", sender->repr().c_str(), data.reasonCode));
+        const std::string err = "Client '" + sender->repr() + "' connection failed. Reason: " + reasonCodeToString(data.reasonCode) ;
+        throw std::runtime_error(err);
     }
 
     if (!settings->allowUnsafeClientidChars && containsDangerousCharacters(data.assigned_client_id))