Filter BlacklistedTopics (topics where only Bridge can publish)

src/Ctrl2MqttBridge/Classes/BlacklistedTopics.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Ctrl2MqttBridge.Classes
+{
+    static class BlacklistedTopics
+    {
+        private static readonly string[] ReservedTopics = { 
+            "/bridgeStatus",
+            "/writeresult",
+            "/readresult",
+            "/subscriptionnotification",
+            "/alarmnotification",
+            "/writevalue"
+        };
+
+        public static bool ContainsBlacklisted(string topic)
+        {
+            bool result = false;
+            foreach(var blacklistedTopic in ReservedTopics)
+            {
+                if (topic.ToLower().Contains(blacklistedTopic.ToLower()))
+                    result = true;
+            }
+            return result;
+        }
+
+    }
+}

src/Ctrl2MqttBridge/Ctrl2MqttBridge.cs

@@ -204,7 +204,9 @@ async Task initMqttServer()
                 })
                 .WithApplicationMessageInterceptor(m =>
                 {
-                    if (ClientRights.ContainsKey(m.ClientId)) //Sollte immer true sein...
+                    if (m.ClientId != ClientId && BlacklistedTopics.ContainsBlacklisted(m.ApplicationMessage.Topic))
+                        m.AcceptPublish = false;
+                    else if (ClientRights.ContainsKey(m.ClientId)) //Sollte immer true sein...
                         m.AcceptPublish = ClientRights[m.ClientId];
                     else
                         m.AcceptPublish = false;