Use IConnectionEndPointFeature to get IMqttChannelAdapter.Endpoint in aspnetcore31

Source/MQTTnet.AspnetCore/MqttConnectionContext.cs

@@ -25,7 +25,7 @@ namespace MQTTnet.AspNetCore
                 _input = Connection.Transport.Input;
                 _output = Connection.Transport.Output;
             }
-            
+
             _reader = new SpanBasedMqttPacketBodyReader();
         }
 
@@ -37,6 +37,13 @@ namespace MQTTnet.AspNetCore
         {
             get
             {
+#if NETCOREAPP3_1
+                var endpointFeature = Connection.Features.Get<Microsoft.AspNetCore.Connections.Features.IConnectionEndPointFeature>();
+                if (endpointFeature != null)
+                {
+                    return endpointFeature.RemoteEndPoint.ToString();
+                }
+#endif
                 var connection = Http?.HttpContext?.Connection;
                 if (connection == null)
                 {