Remove timeout from send method.

Source/MQTTnet/Server/MqttClientConnection.cs

@@ -100,7 +100,7 @@ namespace MQTTnet.Server
                     await _channelAdapter.SendPacketAsync(new MqttDisconnectPacket
                     {
                         ReasonCode = reason
-                    }, _serverOptions.DefaultCommunicationTimeout, CancellationToken.None).ConfigureAwait(false);
+                    }, CancellationToken.None).ConfigureAwait(false);
                 }
                 catch (Exception exception)
                 {
@@ -485,16 +485,17 @@ namespace MQTTnet.Server
             }
         }
 
-        async Task SendAsync(MqttBasePacket packet, CancellationToken cancellationToken)
+        Task SendAsync(MqttBasePacket packet, CancellationToken cancellationToken)
         {
-            await _channelAdapter.SendPacketAsync(packet, _serverOptions.DefaultCommunicationTimeout, cancellationToken).ConfigureAwait(false);
-
-            Interlocked.Increment(ref _receivedPacketsCount);
-
-            if (packet is MqttPublishPacket)
+            return _channelAdapter.SendPacketAsync(packet, cancellationToken).ContinueWith(task =>
             {
-                Interlocked.Increment(ref _receivedApplicationMessagesCount);
-            }
+                Interlocked.Increment(ref _receivedPacketsCount);
+
+                if (packet is MqttPublishPacket)
+                {
+                    Interlocked.Increment(ref _receivedApplicationMessagesCount);
+                }
+            }, cancellationToken);
         }
     }
 }

Source/MQTTnet/Server/MqttClientSessionsManager.cs

@@ -18,7 +18,7 @@ namespace MQTTnet.Server
 {
     public sealed class MqttClientSessionsManager : IDisposable
     {
-        readonly BlockingCollection<MqttEnqueuedApplicationMessage> _messageQueue = new BlockingCollection<MqttEnqueuedApplicationMessage>();
+        readonly BlockingCollection<MqttPendingApplicationMessage> _messageQueue = new BlockingCollection<MqttPendingApplicationMessage>();
 
         readonly object _createConnectionSyncRoot = new object();
         readonly Dictionary<string, MqttClientConnection> _connections = new Dictionary<string, MqttClientConnection>();
@@ -92,7 +92,7 @@ namespace MQTTnet.Server
                     // Send failure response here without preparing a session. The result for a successful connect
                     // will be sent from the session itself.
                     var connAckPacket = channelAdapter.PacketFormatterAdapter.DataConverter.CreateConnAckPacket(connectionValidatorContext);
-                    await channelAdapter.SendPacketAsync(connAckPacket, _options.DefaultCommunicationTimeout, cancellationToken).ConfigureAwait(false);
+                    await channelAdapter.SendPacketAsync(connAckPacket, cancellationToken).ConfigureAwait(false);
 
                     return;
                 }
@@ -177,7 +177,7 @@ namespace MQTTnet.Server
         {
             if (applicationMessage == null) throw new ArgumentNullException(nameof(applicationMessage));
 
-            _messageQueue.Add(new MqttEnqueuedApplicationMessage(applicationMessage, sender));
+            _messageQueue.Add(new MqttPendingApplicationMessage(applicationMessage, sender));
         }
 
         public Task SubscribeAsync(string clientId, ICollection<MqttTopicFilter> topicFilters)
@@ -273,7 +273,7 @@ namespace MQTTnet.Server
             {
                 cancellationToken.ThrowIfCancellationRequested();
 
-                MqttEnqueuedApplicationMessage queuedApplicationMessage;
+                MqttPendingApplicationMessage queuedApplicationMessage;
                 try
                 {
                      queuedApplicationMessage = _messageQueue.Take(cancellationToken);

Source/MQTTnet/Server/MqttPendingApplicationMessage.cs

@@ -1,8 +1,8 @@
 namespace MQTTnet.Server
 {
-    public class MqttEnqueuedApplicationMessage
+    public sealed class MqttPendingApplicationMessage
     {
-        public MqttEnqueuedApplicationMessage(MqttApplicationMessage applicationMessage, MqttClientConnection sender)
+        public MqttPendingApplicationMessage(MqttApplicationMessage applicationMessage, MqttClientConnection sender)
         {
             Sender = sender;
             ApplicationMessage = applicationMessage;