Merge pull request 'Various improvements and fixes' (#49) from fix/stanza-ordering into master

Reviewed-on: https://codeberg.org/moxxy/moxxmpp/pulls/49

examples_dart/bin/component.dart

@@ -3,6 +3,8 @@ import 'package:moxxmpp/moxxmpp.dart';
 import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
 
 class TestingTCPSocketWrapper extends TCPSocketWrapper {
+  TestingTCPSocketWrapper() : super(true);
+
   @override
   bool onBadCertificate(dynamic certificate, String domain) {
     return true;

examples_dart/bin/muc_client.dart

@@ -75,11 +75,16 @@ void main(List<String> args) async {
   });
 
   // Join room
-  await connection.getManagerById<MUCManager>(mucManager)!.joinRoom(
+  final mm = connection.getManagerById<MUCManager>(mucManager)!;
+  await mm.joinRoom(
     muc,
     nick,
     maxHistoryStanzas: 0,
   );
+  final state = (await mm.getRoomState(muc))!;
+
+  print('=====> ${state.members.length} users in room');
+  print('=====> ${state.members.values.map((m) => m.nick).join(", ")}');
 
   final repl = Repl(prompt: '> ');
   await for (final line in repl.runAsync()) {

examples_dart/bin/omemo_client.dart

@@ -30,7 +30,7 @@ void main(List<String> args) async {
     TestingReconnectionPolicy(),
     AlwaysConnectedConnectivityManager(),
     ClientToServerNegotiator(),
-    ExampleTCPSocketWrapper(parser.srvRecord),
+    ExampleTCPSocketWrapper(parser.srvRecord, true),
   )..connectionSettings = parser.connectionSettings;
 
   // Generate OMEMO data

examples_dart/bin/simple_client.dart

@@ -0,0 +1,112 @@
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/moxxmpp.dart';
+import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
+
+/// The JID we want to authenticate as.
+final xmppUser = JID.fromString('jane@example.com');
+
+/// The password to authenticate with.
+const xmppPass = 'secret';
+
+/// The [xmppHost]:[xmppPort] server address to connect to.
+/// In a real application, one might prefer to use [TCPSocketWrapper]
+/// with a custom DNS implementation to let moxxmpp resolve the XMPP
+/// server's address automatically. However, if we just provide a host
+/// and a port, then [TCPSocketWrapper] will just skip the resolution and
+/// immediately use the provided connection details.
+const xmppHost = 'localhost';
+const xmppPort = 5222;
+
+void main(List<String> args) async {
+  Logger.root.level = Level.ALL;
+  Logger.root.onRecord.listen((record) {
+    print('${record.level.name}|${record.time}: ${record.message}');
+  });
+
+  // This class manages every aspect of handling the XMPP stream.
+  final connection = XmppConnection(
+    // A reconnection policy tells the connection how to handle an error
+    // while or after connecting to the server. The [TestingReconnectionPolicy]
+    // immediately triggers a reconnection. In a real implementation, one might
+    // prefer to use a smarter strategy, like using an exponential backoff.
+    TestingReconnectionPolicy(),
+
+    // A connectivity manager tells the connection when it can connect. This is to
+    // ensure that we're not constantly trying to reconnect because we have no
+    // Internet connection. [AlwaysConnectedConnectivityManager] always says that
+    // we're connected. In a real application, one might prefer to use a smarter
+    // strategy, like using connectivity_plus to query the system's network connectivity
+    // state.
+    AlwaysConnectedConnectivityManager(),
+
+    // This kind of negotiator tells the connection how to handle the stream
+    // negotiations. The [ClientToServerNegotiator] allows to connect to the server
+    // as a regular client. Another negotiator would be the [ComponentToServerNegotiator] that
+    // allows for connections to the server where we're acting as a component.
+    ClientToServerNegotiator(),
+
+    // A wrapper around any kind of connection. In this case, we use the [TCPSocketWrapper], which
+    // uses a dart:io Socket/SecureSocket to connect to the server. If you want, you can also
+    // provide your own socket to use, for example, WebSockets or any other connection
+    // mechanism.
+    TCPSocketWrapper(false),
+  )..connectionSettings = ConnectionSettings(
+      jid: xmppUser,
+      password: xmppPass,
+      host: xmppHost,
+      port: xmppPort,
+    );
+
+  // Register a set of "managers" that provide you with implementations of various
+  // XEPs. Some have interdependencies, which need to be met. However, this example keeps
+  // it simple and just registers a [MessageManager], which has no required dependencies.
+  await connection.registerManagers([
+    // The [MessageManager] handles receiving and sending <message /> stanzas.
+    MessageManager(),
+  ]);
+
+  // Feature negotiators are objects that tell the connection negotiator what stream features
+  // we can negotiate and enable. moxxmpp negotiators always try to enable their features.
+  await connection.registerFeatureNegotiators([
+    // This negotiator authenticates to the server using SASL PLAIN with the provided
+    // credentials.
+    SaslPlainNegotiator(),
+    // This negotiator attempts to bind a resource. By default, it's always a random one.
+    ResourceBindingNegotiator(),
+    // This negotiator attempts to do StartTLS before authenticating.
+    StartTlsNegotiator(),
+  ]);
+
+  // Set up a stream handler for the connection's event stream. Managers and negotiators
+  // may trigger certain events. The [MessageManager], for example, triggers a [MessageEvent]
+  // whenever a message is received. If other managers are registered that parse a message's
+  // contents, then they can add their data to the event.
+  connection.asBroadcastStream().listen((event) {
+    if (event is! MessageEvent) {
+      return;
+    }
+
+    // The text body (contents of the <body /> element) are returned as a
+    // [MessageBodyData] object. However, a message does not have to contain a
+    // body, so it is nullable.
+    final body = event.extensions.get<MessageBodyData>()?.body;
+    print('[<-- ${event.from}] $body');
+  });
+
+  // Connect to the server.
+  final result = await connection.connect(
+    // This flag indicates that we want to reconnect in case something happens.
+    shouldReconnect: true,
+    // This flag indicates that we want the returned Future to only resolve
+    // once the stream negotiations are done and no negotiator has any feature left
+    // to negotiate.
+    waitUntilLogin: true,
+  );
+
+  // Check if the connection was successful. [connection.connect] can return a boolean
+  // to indicate success or a [XmppError] in case the connection attempt failed.
+  if (!result.isType<bool>()) {
+    print('Failed to connect to server');
+    return;
+  }
+}

examples_dart/lib/socket.dart

@@ -3,7 +3,7 @@ import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
 /// A simple socket for examples that allows injection of SRV records (since
 /// we cannot use moxdns here).
 class ExampleTCPSocketWrapper extends TCPSocketWrapper {
-  ExampleTCPSocketWrapper(this.srvRecord);
+  ExampleTCPSocketWrapper(this.srvRecord, bool logData) : super(logData);
 
   /// A potential SRV record to inject for testing.
   final MoxSrvRecord? srvRecord;

examples_dart/pubspec.yaml

@@ -12,10 +12,10 @@ dependencies:
   logging: ^1.0.2
   moxxmpp:
     hosted: https://git.polynom.me/api/packages/Moxxy/pub
-    version: 0.3.1
+    version: 0.4.0
   moxxmpp_socket_tcp:
     hosted: https://git.polynom.me/api/packages/Moxxy/pub
-    version: 0.3.1
+    version: 0.4.0
   omemo_dart:
     hosted: https://git.polynom.me/api/packages/PapaTutuWawa/pub
     version: ^0.5.1

packages/moxxmpp/CHANGELOG.md

@@ -23,6 +23,9 @@
 - *BREAKING*: `UserAvatarManager`'s `getAvatarId` with `getLatestMetadata`.
 - The `PubSubManager` now supports PubSub's `max_items` in `getItems`.
 - *BREAKING*: `vCardManager`'s `VCardAvatarUpdatedEvent` no longer automatically requests the newest VCard avatar.
+- *BREAKING*: `XmppConnection` now tries to ensure that incoming data is processed in-order. The only exception are awaited stanzas as they are allowed to bypass the queue.
+- *BREAKING*: If a stanza handler causes an exception, the handler is simply skipped while processing.
+- Add better logging around what stanza handler is running and if they end processing early.
 
 ## 0.3.1
 

packages/moxxmpp/lib/moxxmpp.dart

@@ -47,6 +47,7 @@ export 'package:moxxmpp/src/xeps/xep_0030/helpers.dart';
 export 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 export 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 export 'package:moxxmpp/src/xeps/xep_0045/errors.dart';
+export 'package:moxxmpp/src/xeps/xep_0045/events.dart';
 export 'package:moxxmpp/src/xeps/xep_0045/types.dart';
 export 'package:moxxmpp/src/xeps/xep_0045/xep_0045.dart';
 export 'package:moxxmpp/src/xeps/xep_0054.dart';

packages/moxxmpp/lib/src/awaiter.dart

@@ -1,35 +1,13 @@
 import 'dart:async';
-import 'package:meta/meta.dart';
-import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 import 'package:synchronized/synchronized.dart';
 
-/// A surrogate key for awaiting stanzas.
+/// (JID we sent a stanza to, the id of the sent stanza, the tag of the sent stanza).
-@immutable
+// ignore: avoid_private_typedef_functions
-class _StanzaSurrogateKey {
+typedef _StanzaCompositeKey = (String?, String, String);
-  const _StanzaSurrogateKey(this.sentTo, this.id, this.tag);
 
-  /// The JID the original stanza was sent to. We expect the result to come from the
+/// Callback function that returns the bare JID of the connection as a String.
-  /// same JID.
+typedef GetBareJidCallback = String Function();
-  final String sentTo;
-
-  /// The ID of the original stanza. We expect the result to have the same ID.
-  final String id;
-
-  /// The tag name of the stanza.
-  final String tag;
-
-  @override
-  int get hashCode => sentTo.hashCode ^ id.hashCode ^ tag.hashCode;
-
-  @override
-  bool operator ==(Object other) {
-    return other is _StanzaSurrogateKey &&
-        other.sentTo == sentTo &&
-        other.id == id &&
-        other.tag == tag;
-  }
-}
 
 /// This class handles the await semantics for stanzas. Stanzas are given a "unique"
 /// key equal to the tuple (to, id, tag) with which their response is identified.
@@ -40,8 +18,12 @@ class _StanzaSurrogateKey {
 ///
 /// This class also handles some "edge cases" of RFC 6120, like an empty "from" attribute.
 class StanzaAwaiter {
+  StanzaAwaiter(this._bareJidCallback);
+
+  final GetBareJidCallback _bareJidCallback;
+
   /// The pending stanzas, identified by their surrogate key.
-  final Map<_StanzaSurrogateKey, Completer<XMLNode>> _pending = {};
+  final Map<_StanzaCompositeKey, Completer<XMLNode>> _pending = {};
 
   /// The critical section for accessing [StanzaAwaiter._pending].
   final Lock _lock = Lock();
@@ -52,30 +34,33 @@ class StanzaAwaiter {
   /// [tag] is the stanza's tag name.
   ///
   /// Returns a future that might resolve to the response to the stanza.
-  Future<Future<XMLNode>> addPending(String to, String id, String tag) async {
+  Future<Future<XMLNode>> addPending(String? to, String id, String tag) async {
+    // Check if we want to send a stanza to our bare JID and replace it with null.
+    final processedTo = to != null && to == _bareJidCallback() ? null : to;
+
     final completer = await _lock.synchronized(() {
       final completer = Completer<XMLNode>();
-      _pending[_StanzaSurrogateKey(to, id, tag)] = completer;
+      _pending[(processedTo, id, tag)] = completer;
       return completer;
     });
 
     return completer.future;
   }
 
-  /// Checks if the stanza [stanza] is being awaited. [bareJid] is the bare JID of
+  /// Checks if the stanza [stanza] is being awaited.
-  /// the connection.
   /// If [stanza] is awaited, resolves the future and returns true. If not, returns
   /// false.
-  Future<bool> onData(XMLNode stanza, JID bareJid) async {
+  Future<bool> onData(XMLNode stanza) async {
-    assert(bareJid.isBare(), 'bareJid must be bare');
-
     final id = stanza.attributes['id'] as String?;
     if (id == null) return false;
 
-    final key = _StanzaSurrogateKey(
+    // Check if we want to send a stanza to our bare JID and replace it with null.
-      // Section 8.1.2.1 § 3 of RFC 6120 says that an empty "from" indicates that the
+    final from = stanza.attributes['from'] as String?;
-      // attribute is implicitly from our own bare JID.
+    final processedFrom =
-      stanza.attributes['from'] as String? ?? bareJid.toString(),
+        from != null && from == _bareJidCallback() ? null : from;
+
+    final key = (
+      processedFrom,
       id,
       stanza.tag,
     );
@@ -91,4 +76,19 @@ class StanzaAwaiter {
       return false;
     });
   }
+
+  /// Checks if [stanza] represents a stanza that is awaited. Returns true, if [stanza]
+  /// is awaited. False, if not.
+  Future<bool> isAwaited(XMLNode stanza) async {
+    final id = stanza.attributes['id'] as String?;
+    if (id == null) return false;
+
+    final key = (
+      stanza.attributes['from'] as String?,
+      id,
+      stanza.tag,
+    );
+
+    return _lock.synchronized(() => _pending.containsKey(key));
+  }
 }

packages/moxxmpp/lib/src/connection.dart

@@ -25,12 +25,12 @@ import 'package:moxxmpp/src/settings.dart';
 import 'package:moxxmpp/src/socket.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/incoming_queue.dart';
 import 'package:moxxmpp/src/util/queue.dart';
 import 'package:moxxmpp/src/util/typed_map.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/xep_0198.dart';
 import 'package:moxxmpp/src/xeps/xep_0352.dart';
-import 'package:synchronized/synchronized.dart';
 import 'package:uuid/uuid.dart';
 
 /// The states the XmppConnection can be in
@@ -49,6 +49,19 @@ enum XmppConnectionState {
   error
 }
 
+/// (The actual stanza handler, Name of the owning manager).
+typedef _StanzaHandlerWrapper = (StanzaHandler, String);
+
+/// Wrapper around [stanzaHandlerSortComparator] for [_StanzaHandlerWrapper].
+int _stanzaHandlerWrapperSortComparator(
+  _StanzaHandlerWrapper a,
+  _StanzaHandlerWrapper b,
+) {
+  final (ha, _) = a;
+  final (hb, _) = b;
+  return stanzaHandlerSortComparator(ha, hb);
+}
+
 /// This class is a connection to the server.
 class XmppConnection {
   XmppConnection(
@@ -58,7 +71,11 @@ class XmppConnection {
     this._socket, {
     this.connectingTimeout = const Duration(minutes: 2),
   })  : _reconnectionPolicy = reconnectionPolicy,
-        _connectivityManager = connectivityManager {
+        _connectivityManager = connectivityManager,
+        assert(
+          _socket.getDataStream().isBroadcast,
+          "The socket's data stream must be a broadcast stream",
+        ) {
     // Allow the reconnection policy to perform reconnections by itself
     _reconnectionPolicy.register(
       _attemptReconnection,
@@ -77,9 +94,15 @@ class XmppConnection {
       },
     );
 
+    _stanzaAwaiter = StanzaAwaiter(
+      () => connectionSettings.jid.toBare().toString(),
+    );
+    _incomingStanzaQueue = IncomingStanzaQueue(handleXmlStream, _stanzaAwaiter);
     _socketStream = _socket.getDataStream();
-    // TODO(Unknown): Handle on done
+    _socketStream
-    _socketStream.transform(_streamParser).forEach(handleXmlStream);
+        .transform(_streamParser)
+        .forEach(_incomingStanzaQueue.addStanza);
+    _socketStream.listen(_handleOnDataCallbacks);
     _socket.getEventStream().listen(handleSocketEvent);
 
     _stanzaQueue = AsyncStanzaQueue(
@@ -109,16 +132,16 @@ class XmppConnection {
   final ConnectivityManager _connectivityManager;
 
   /// A helper for handling await semantics with stanzas
-  final StanzaAwaiter _stanzaAwaiter = StanzaAwaiter();
+  late final StanzaAwaiter _stanzaAwaiter;
 
   /// Sorted list of handlers that we call or incoming and outgoing stanzas
-  final List<StanzaHandler> _incomingStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _incomingStanzaHandlers =
       List.empty(growable: true);
-  final List<StanzaHandler> _incomingPreStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _incomingPreStanzaHandlers =
       List.empty(growable: true);
-  final List<StanzaHandler> _outgoingPreStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _outgoingPreStanzaHandlers =
       List.empty(growable: true);
-  final List<StanzaHandler> _outgoingPostStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _outgoingPostStanzaHandlers =
       List.empty(growable: true);
   final StreamController<XmppEvent> _eventStreamController =
       StreamController.broadcast();
@@ -157,10 +180,6 @@ class XmppConnection {
   T? getNegotiatorById<T extends XmppFeatureNegotiatorBase>(String id) =>
       _negotiationsHandler.getNegotiatorById<T>(id);
 
-  /// Prevent data from being passed to _currentNegotiator.negotiator while the negotiator
-  /// is still running.
-  final Lock _negotiationLock = Lock();
-
   /// The logger for the class
   final Logger _log = Logger('XmppConnection');
 
@@ -169,6 +188,8 @@ class XmppConnection {
 
   bool get isAuthenticated => _isAuthenticated;
 
+  late final IncomingStanzaQueue _incomingStanzaQueue;
+
   late final AsyncStanzaQueue _stanzaQueue;
 
   /// Returns the JID we authenticate with and add the resource that we have bound.
@@ -198,18 +219,25 @@ class XmppConnection {
 
       _xmppManagers[manager.id] = manager;
 
-      _incomingStanzaHandlers.addAll(manager.getIncomingStanzaHandlers());
+      _incomingStanzaHandlers.addAll(
-      _incomingPreStanzaHandlers.addAll(manager.getIncomingPreStanzaHandlers());
+        manager.getIncomingStanzaHandlers().map((h) => (h, manager.name)),
-      _outgoingPreStanzaHandlers.addAll(manager.getOutgoingPreStanzaHandlers());
+      );
-      _outgoingPostStanzaHandlers
+      _incomingPreStanzaHandlers.addAll(
-          .addAll(manager.getOutgoingPostStanzaHandlers());
+        manager.getIncomingPreStanzaHandlers().map((h) => (h, manager.name)),
+      );
+      _outgoingPreStanzaHandlers.addAll(
+        manager.getOutgoingPreStanzaHandlers().map((h) => (h, manager.name)),
+      );
+      _outgoingPostStanzaHandlers.addAll(
+        manager.getOutgoingPostStanzaHandlers().map((h) => (h, manager.name)),
+      );
     }
 
     // Sort them
-    _incomingStanzaHandlers.sort(stanzaHandlerSortComparator);
+    _incomingStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
-    _incomingPreStanzaHandlers.sort(stanzaHandlerSortComparator);
+    _incomingPreStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
-    _outgoingPreStanzaHandlers.sort(stanzaHandlerSortComparator);
+    _outgoingPreStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
-    _outgoingPostStanzaHandlers.sort(stanzaHandlerSortComparator);
+    _outgoingPostStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
 
     // Run the post register callbacks
     for (final manager in _xmppManagers.values) {
@@ -290,6 +318,13 @@ class XmppConnection {
     return getManagerById(csiManager);
   }
 
+  /// Called whenever we receive data on the socket.
+  Future<void> _handleOnDataCallbacks(String _) async {
+    for (final manager in _xmppManagers.values) {
+      unawaited(manager.onData());
+    }
+  }
+
   /// Attempts to reconnect to the server by following an exponential backoff.
   Future<void> _attemptReconnection() async {
     _log.finest('_attemptReconnection: Setting state to notConnected');
@@ -515,7 +550,7 @@ class XmppConnection {
         // A stanza with no to attribute is for direct processing by the server. As such,
         // we can correlate it by just *assuming* we have that attribute
         // (RFC 6120 Section 8.1.1.1)
-        data.stanza.to ?? connectionSettings.jid.toBare().toString(),
+        data.stanza.to,
         data.stanza.id!,
         data.stanza.tag,
       )
@@ -650,15 +685,30 @@ class XmppConnection {
   /// call its callback and end the processing if the callback returned true; continue
   /// if it returned false.
   Future<StanzaHandlerData> _runStanzaHandlers(
-    List<StanzaHandler> handlers,
+    List<_StanzaHandlerWrapper> handlers,
     Stanza stanza, {
     StanzaHandlerData? initial,
   }) async {
     var state = initial ?? StanzaHandlerData(false, false, stanza, TypedMap());
-    for (final handler in handlers) {
+    for (final handlerRaw in handlers) {
+      final (handler, managerName) = handlerRaw;
       if (handler.matches(state.stanza)) {
+        _log.finest(
+          'Running handler for ${stanza.tag} (${stanza.attributes["id"]}) of $managerName',
+        );
+        try {
           state = await handler.callback(state.stanza, state);
-        if (state.done || state.cancel) return state;
+        } catch (ex) {
+          _log.severe(
+            'Handler from $managerName for ${stanza.tag} (${stanza.attributes["id"]}) failed with "$ex"',
+          );
+        }
+        if (state.done || state.cancel) {
+          _log.finest(
+            'Processing ended early for ${stanza.tag} (${stanza.attributes["id"]}) by $managerName',
+          );
+          return state;
+        }
       }
     }
 
@@ -743,7 +793,6 @@ class XmppConnection {
 
     final awaited = await _stanzaAwaiter.onData(
       incomingPreHandlers.stanza,
-      connectionSettings.jid.toBare(),
     );
     if (awaited) {
       return;
@@ -802,14 +851,12 @@ class XmppConnection {
         // causing (a) the negotiator to become confused and (b) the stanzas/nonzas to be
         // missed. This causes the data to wait while the negotiator is running and thus
         // prevent this issue.
-        await _negotiationLock.synchronized(() async {
         if (_routingState != RoutingState.negotiating) {
           unawaited(handleXmlStream(event));
           return;
         }
 
         await _negotiationsHandler.negotiate(event);
-        });
         break;
       case RoutingState.handleStanzas:
         await _handleStanza(node);

packages/moxxmpp/lib/src/managers/base.dart

@@ -80,6 +80,9 @@ abstract class XmppManagerBase {
   /// handler's priority, the earlier it is run.
   List<NonzaHandler> getNonzaHandlers() => [];
 
+  /// Whenever the socket receives data, this method is called, if it is non-null.
+  Future<void> onData() async {}
+
   /// Return a list of features that should be included in a disco response.
   List<String> getDiscoFeatures() => [];
 

packages/moxxmpp/lib/src/parser.dart

@@ -57,9 +57,10 @@ class _ChunkedConversionBuffer<S, T> {
 }
 
 /// A buffer to put between a socket's input and a full XML stream.
-class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
+class XMPPStreamParser
-  final StreamController<XMPPStreamObject> _streamController =
+    extends StreamTransformerBase<String, List<XMPPStreamObject>> {
-      StreamController<XMPPStreamObject>();
+  final StreamController<List<XMPPStreamObject>> _streamController =
+      StreamController<List<XMPPStreamObject>>();
 
   /// Turns a String into a list of [XmlEvent]s in a chunked fashion.
   _ChunkedConversionBuffer<String, XmlEvent> _eventBuffer =
@@ -117,13 +118,14 @@ class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
   }
 
   @override
-  Stream<XMPPStreamObject> bind(Stream<String> stream) {
+  Stream<List<XMPPStreamObject>> bind(Stream<String> stream) {
     // We do not want to use xml's toXmlEvents and toSubtreeEvents methods as they
     // create streams we cannot close. We need to be able to destroy and recreate an
     // XML parser whenever we start a new connection.
     stream.listen((input) {
       final events = _eventBuffer.convert(input);
       final streamHeaderEvents = _streamHeaderSelector.convert(events);
+      final objects = List<XMPPStreamObject>.empty(growable: true);
 
       // Process the stream header separately.
       for (final event in streamHeaderEvents) {
@@ -135,7 +137,7 @@ class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
           continue;
         }
 
-        _streamController.add(
+        objects.add(
           XMPPStreamHeader(
             Map<String, String>.fromEntries(
               event.attributes.map((attr) {
@@ -151,13 +153,15 @@ class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
       final children = _childBuffer.convert(childEvents);
       for (final node in children) {
         if (node.nodeType == XmlNodeType.ELEMENT) {
-          _streamController.add(
+          objects.add(
             XMPPStreamElement(
               XMLNode.fromXmlElement(node as XmlElement),
             ),
           );
         }
       }
+
+      _streamController.add(objects);
     });
 
     return _streamController.stream;

packages/moxxmpp/lib/src/stanza.dart

@@ -102,6 +102,8 @@ class RemoteServerTimeoutError extends StanzaError {
 /// An unknown error.
 class UnknownStanzaError extends StanzaError {}
 
+const _stanzaNotDefined = Object();
+
 class Stanza extends XMLNode {
   // ignore: use_super_parameters
   Stanza({
@@ -216,7 +218,7 @@ class Stanza extends XMLNode {
 
   Stanza copyWith({
     String? id,
-    String? from,
+    Object? from = _stanzaNotDefined,
     String? to,
     String? type,
     List<XMLNode>? children,
@@ -225,7 +227,7 @@ class Stanza extends XMLNode {
     return Stanza(
       tag: tag,
       to: to ?? this.to,
-      from: from ?? this.from,
+      from: from != _stanzaNotDefined ? from as String? : this.from,
       id: id ?? this.id,
       type: type ?? this.type,
       children: children ?? this.children,

packages/moxxmpp/lib/src/util/incoming_queue.dart

@@ -0,0 +1,97 @@
+import 'dart:async';
+import 'dart:collection';
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/src/awaiter.dart';
+import 'package:moxxmpp/src/parser.dart';
+import 'package:synchronized/synchronized.dart';
+
+/// A queue for incoming [XMPPStreamObject]s to ensure "in order"
+/// processing (except for stanzas that are awaited).
+class IncomingStanzaQueue {
+  IncomingStanzaQueue(this._callback, this._stanzaAwaiter);
+
+  /// The queue for storing the completer of each
+  /// incoming stanza (or stream object to be precise).
+  /// Only access while holding the lock [_lock].
+  final Queue<Completer<void>> _queue = Queue();
+
+  /// Flag indicating whether a callback is already running (true)
+  /// or not. "a callback" and not "the callback" because awaited stanzas
+  /// are allowed to bypass the queue.
+  /// Only access while holding the lock [_lock].
+  bool _isRunning = false;
+
+  /// The function to call to process an incoming stream object.
+  final Future<void> Function(XMPPStreamObject) _callback;
+
+  /// Lock guarding both [_queue] and [_isRunning].
+  final Lock _lock = Lock();
+
+  /// Logger.
+  final Logger _log = Logger('IncomingStanzaQueue');
+
+  final StanzaAwaiter _stanzaAwaiter;
+
+  Future<void> _processStreamObject(
+    Future<void>? future,
+    XMPPStreamObject object,
+  ) async {
+    if (future == null) {
+      if (object is XMPPStreamElement) {
+        _log.finest(
+          'Bypassing queue for ${object.node.tag} (${object.node.attributes["id"]})',
+        );
+      }
+      return _callback(object);
+    }
+
+    // Wait for our turn.
+    await future;
+
+    // Run the callback.
+    await _callback(object);
+
+    // Run the next entry.
+    await _lock.synchronized(() {
+      if (_queue.isNotEmpty) {
+        _queue.removeFirst().complete();
+      } else {
+        _isRunning = false;
+      }
+    });
+  }
+
+  Future<void> addStanza(List<XMPPStreamObject> objects) async {
+    await _lock.synchronized(() async {
+      for (final object in objects) {
+        if (await canBypassQueue(object)) {
+          unawaited(
+            _processStreamObject(null, object),
+          );
+          continue;
+        }
+
+        final completer = Completer<void>();
+        if (_isRunning) {
+          _queue.add(completer);
+        } else {
+          _isRunning = true;
+          completer.complete();
+        }
+
+        unawaited(
+          _processStreamObject(completer.future, object),
+        );
+      }
+    });
+  }
+
+  Future<bool> canBypassQueue(XMPPStreamObject object) async {
+    if (object is XMPPStreamHeader) {
+      return false;
+    }
+
+    object as XMPPStreamElement;
+    return _stanzaAwaiter.isAwaited(object.node);
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0045/events.dart

@@ -3,14 +3,25 @@ import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/xeps/xep_0045/types.dart';
 
 /// Triggered when the MUC changes our nickname.
-class NickChangedByMUCEvent extends XmppEvent {
+class OwnDataChangedEvent extends XmppEvent {
-  NickChangedByMUCEvent(this.roomJid, this.nick);
+  OwnDataChangedEvent(
+    this.roomJid,
+    this.nick,
+    this.affiliation,
+    this.role,
+  );
 
   /// The JID of the room.
   final JID roomJid;
 
-  /// The new nickname.
+  /// Our nickname.
   final String nick;
+
+  /// Our affiliation.
+  final Affiliation affiliation;
+
+  /// Our role.
+  final Role role;
 }
 
 /// Triggered when an entity joins the MUC.
@@ -45,3 +56,17 @@ class MemberLeftEvent extends XmppEvent {
   /// The nick of the user who left.
   final String nick;
 }
+
+/// Triggered when an entity changes their nick.
+class MemberChangedNickEvent extends XmppEvent {
+  MemberChangedNickEvent(this.roomJid, this.oldNick, this.newNick);
+
+  /// The JID of the room.
+  final JID roomJid;
+
+  /// The original nick.
+  final String oldNick;
+
+  /// The new nick.
+  final String newNick;
+}

packages/moxxmpp/lib/src/xeps/xep_0045/status_codes.dart

@@ -0,0 +1,2 @@
+const selfPresenceStatus = '110';
+const nicknameChangedStatus = '303';

packages/moxxmpp/lib/src/xeps/xep_0045/types.dart

@@ -5,6 +5,7 @@ import 'package:moxxmpp/src/xeps/xep_0004.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 
 class InvalidAffiliationException implements Exception {}
+
 class InvalidRoleException implements Exception {}
 
 enum Affiliation {
@@ -148,6 +149,13 @@ class RoomState {
   /// Flag whether we're joined and can process messages
   bool joined;
 
+  /// Our own affiliation inside the MUC.
+  Affiliation? affiliation;
+
+  /// Our own role inside the MUC.
+  Role? role;
+
+  /// The list of messages that we sent and are waiting for their echo.
   late final List<PendingMessage> pendingMessages;
 
   /// "List" of entities inside the MUC.

packages/moxxmpp/lib/src/xeps/xep_0045/xep_0045.dart

@@ -14,9 +14,9 @@ import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 import 'package:moxxmpp/src/xeps/xep_0045/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0045/events.dart';
+import 'package:moxxmpp/src/xeps/xep_0045/status_codes.dart';
 import 'package:moxxmpp/src/xeps/xep_0045/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0359.dart';
-import 'package:synchronized/extension.dart';
 import 'package:synchronized/synchronized.dart';
 
 /// (Room JID, nickname)
@@ -251,19 +251,23 @@ class MUCManager extends XmppManagerBase {
     StanzaHandlerData state,
   ) async {
     if (presence.from == null) {
+      logger.finest('Ignoring presence as it has no from attribute');
       return state;
     }
 
     final from = JID.fromString(presence.from!);
     final bareFrom = from.toBare();
     return _cacheLock.synchronized(() {
+      logger.finest('Lock aquired for presence from ${presence.from}');
       final room = _mucRoomCache[bareFrom];
       if (room == null) {
+        logger.finest('Ignoring presence as it does not belong to a room');
         return state;
       }
 
       if (from.resource.isEmpty) {
         // TODO(Unknown): Handle presence from the room itself.
+        logger.finest('Ignoring presence as it has no resource');
         return state;
       }
 
@@ -297,20 +301,33 @@ class MUCManager extends XmppManagerBase {
       final role = Role.fromString(
         item.attributes['role']! as String,
       );
+      final affiliation = Affiliation.fromString(
+        item.attributes['affiliation']! as String,
+      );
 
-      if (statuses.contains('110')) {
+      if (statuses.contains(selfPresenceStatus)) {
-        if (room.nick != from.resource) {
+        if (room.joined) {
-          // Notify us of the changed nick.
+          if (room.nick != from.resource ||
+              room.affiliation != affiliation ||
+              room.role != role) {
+            // Notify us of the changed data.
             getAttributes().sendEvent(
-            NickChangedByMUCEvent(
+              OwnDataChangedEvent(
                 bareFrom,
                 from.resource,
+                affiliation,
+                role,
               ),
             );
           }
+        }
 
-        // Set the nick to make sure we're in sync with the MUC.
+        // Set the data to make sure we're in sync with the MUC.
-        room.nick = from.resource;
+        room
+          ..nick = from.resource
+          ..affiliation = affiliation
+          ..role = role;
+        logger.finest('Self-presence handled');
         return StanzaHandlerData(
           true,
           false,
@@ -319,7 +336,8 @@ class MUCManager extends XmppManagerBase {
         );
       }
 
-      if (presence.attributes['type'] == 'unavailable' && role == Role.none) {
+      if (presence.attributes['type'] == 'unavailable') {
+        if (role == Role.none) {
           // Cannot happen while joining, so we assume we are joined
           assert(
             room.joined,
@@ -332,6 +350,35 @@ class MUCManager extends XmppManagerBase {
               from.resource,
             ),
           );
+        } else if (statuses.contains(nicknameChangedStatus)) {
+          assert(
+            room.joined,
+            'Should not receive nick change while joining',
+          );
+          final newNick = item.attributes['nick']! as String;
+          final member = RoomMember(
+            newNick,
+            Affiliation.fromString(
+              item.attributes['affiliation']! as String,
+            ),
+            role,
+          );
+
+          // Remove the old member.
+          room.members.remove(from.resource);
+
+          // Add the "new" member".
+          room.members[newNick] = member;
+
+          // Trigger an event.
+          getAttributes().sendEvent(
+            MemberChangedNickEvent(
+              bareFrom,
+              from.resource,
+              newNick,
+            ),
+          );
+        }
       } else {
         final member = RoomMember(
           from.resource,
@@ -344,14 +391,14 @@ class MUCManager extends XmppManagerBase {
         if (room.joined) {
           if (room.members.containsKey(from.resource)) {
             getAttributes().sendEvent(
-              MemberJoinedEvent(
+              MemberChangedEvent(
                 bareFrom,
                 member,
               ),
             );
           } else {
             getAttributes().sendEvent(
-              MemberChangedEvent(
+              MemberJoinedEvent(
                 bareFrom,
                 member,
               ),
@@ -360,8 +407,10 @@ class MUCManager extends XmppManagerBase {
         }
 
         room.members[from.resource] = member;
+        logger.finest('${from.resource} added to the member list');
       }
 
+      logger.finest('Ran through');
       return StanzaHandlerData(
         true,
         false,
@@ -398,7 +447,8 @@ class MUCManager extends XmppManagerBase {
   ) async {
     final fromJid = JID.fromString(message.from!);
     final roomJid = fromJid.toBare();
-    return _mucRoomCache.synchronized(() {
+    return _cacheLock.synchronized(() {
+      logger.finest('Lock aquired for message from ${message.from}');
       final roomState = _mucRoomCache[roomJid];
       if (roomState == null) {
         return state;

packages/moxxmpp/lib/src/xeps/xep_0054.dart

@@ -56,14 +56,13 @@ class VCardManager extends XmppManagerBase {
     final x = presence.firstTag('x', xmlns: vCardTempUpdate)!;
     final hash = x.firstTag('photo')!.innerText();
 
-    // TODO(Unknown): Use the presence manager interface.
     getAttributes().sendEvent(
       VCardAvatarUpdatedEvent(
         JID.fromString(presence.from!),
         hash,
       ),
     );
-    return state..done = true;
+    return state;
   }
 
   VCardPhoto? _parseVCardPhoto(XMLNode? node) {

packages/moxxmpp/lib/src/xeps/xep_0115.dart

@@ -173,39 +173,20 @@ class EntityCapabilitiesManager extends XmppManagerBase {
     });
   }
 
-  @visibleForTesting
+  Future<void> _performQuery(
-  Future<StanzaHandlerData> onPresence(
+    Stanza presence,
-    Stanza stanza,
+    String ver,
-    StanzaHandlerData state,
+    String hashFunctionName,
+    String capabilityNode,
+    JID from,
   ) async {
-    if (stanza.from == null) {
-      return state;
-    }
-
-    final from = JID.fromString(stanza.from!);
-    final c = stanza.firstTag('c', xmlns: capsXmlns)!;
-
-    final hashFunctionName = c.attributes['hash'] as String?;
-    final capabilityNode = c.attributes['node'] as String?;
-    final ver = c.attributes['ver'] as String?;
-    if (hashFunctionName == null || capabilityNode == null || ver == null) {
-      return state;
-    }
-
-    // Check if we know of the hash
-    final isCached =
-        await _cacheLock.synchronized(() => _capHashCache.containsKey(ver));
-    if (isCached) {
-      return state;
-    }
-
     final dm = getAttributes().getManagerById<DiscoManager>(discoManager)!;
     final discoRequest = await dm.discoInfoQuery(
       from,
       node: capabilityNode,
     );
     if (discoRequest.isType<StanzaError>()) {
-      return state;
+      return;
     }
     final discoInfo = discoRequest.get<DiscoInfo>();
 
@@ -220,7 +201,7 @@ class EntityCapabilitiesManager extends XmppManagerBase {
           discoInfo,
         ),
       );
-      return state;
+      return;
     }
 
     // Validate the disco#info result according to XEP-0115 § 5.4
@@ -234,7 +215,7 @@ class EntityCapabilitiesManager extends XmppManagerBase {
         logger.warning(
           'Malformed disco#info response: More than one equal identity',
         );
-        return state;
+        return;
       }
     }
 
@@ -245,7 +226,7 @@ class EntityCapabilitiesManager extends XmppManagerBase {
         logger.warning(
           'Malformed disco#info response: More than one equal feature',
         );
-        return state;
+        return;
       }
     }
 
@@ -273,7 +254,7 @@ class EntityCapabilitiesManager extends XmppManagerBase {
           logger.warning(
             'Malformed disco#info response: Extended Info FORM_TYPE contains more than one value(s) of different value.',
           );
-          return state;
+          return;
         }
       }
 
@@ -288,7 +269,7 @@ class EntityCapabilitiesManager extends XmppManagerBase {
         logger.warning(
           'Malformed disco#info response: More than one Extended Disco Info forms with the same FORM_TYPE value',
         );
-        return state;
+        return;
       }
 
       // Check if the field type is hidden
@@ -325,7 +306,43 @@ class EntityCapabilitiesManager extends XmppManagerBase {
         'Capability hash mismatch from $from: Received "$ver", expected "$computedCapabilityHash".',
       );
     }
+  }
 
+  @visibleForTesting
+  Future<StanzaHandlerData> onPresence(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
+    if (stanza.from == null) {
+      return state;
+    }
+
+    final from = JID.fromString(stanza.from!);
+    final c = stanza.firstTag('c', xmlns: capsXmlns)!;
+
+    final hashFunctionName = c.attributes['hash'] as String?;
+    final capabilityNode = c.attributes['node'] as String?;
+    final ver = c.attributes['ver'] as String?;
+    if (hashFunctionName == null || capabilityNode == null || ver == null) {
+      return state;
+    }
+
+    // Check if we know of the hash
+    final isCached =
+        await _cacheLock.synchronized(() => _capHashCache.containsKey(ver));
+    if (isCached) {
+      return state;
+    }
+
+    unawaited(
+      _performQuery(
+        stanza,
+        ver,
+        hashFunctionName,
+        capabilityNode,
+        from,
+      ),
+    );
     return state;
   }
 

packages/moxxmpp/lib/src/xeps/xep_0198/xep_0198.dart

@@ -75,6 +75,17 @@ class StreamManagementManager extends XmppManagerBase {
     return acks;
   }
 
+  @override
+  Future<void> onData() async {
+    // The ack timer does not matter if we are currently in the middle of receiving
+    // data.
+    await _ackLock.synchronized(() {
+      if (_pendingAcks > 0) {
+        _resetAckTimer();
+      }
+    });
+  }
+
   /// Called when a stanza has been acked to decide whether we should trigger a
   /// StanzaAckedEvent.
   ///
@@ -225,6 +236,12 @@ class StreamManagementManager extends XmppManagerBase {
     _ackTimer = null;
   }
 
+  /// Resets the ack timer.
+  void _resetAckTimer() {
+    _stopAckTimer();
+    _startAckTimer();
+  }
+
   @visibleForTesting
   Future<void> handleAckTimeout() async {
     _stopAckTimer();
@@ -315,8 +332,7 @@ class StreamManagementManager extends XmppManagerBase {
 
           // Reset the timer
           if (_pendingAcks > 0) {
-            _stopAckTimer();
+            _resetAckTimer();
-            _startAckTimer();
           }
         }
 

packages/moxxmpp/test/awaiter_test.dart

@@ -2,11 +2,12 @@ import 'package:moxxmpp/moxxmpp.dart';
 import 'package:moxxmpp/src/awaiter.dart';
 import 'package:test/test.dart';
 
-void main() {
+const bareJid = 'user4@example.org';
-  const bareJid = JID('moxxmpp', 'server3.example', '');
+String getBareJidCallback() => bareJid;
 
+void main() {
   test('Test awaiting an awaited stanza with a from attribute', () async {
-    final awaiter = StanzaAwaiter();
+    final awaiter = StanzaAwaiter(getBareJidCallback);
 
     // "Send" a stanza
     final future = await awaiter.addPending(
@@ -20,14 +21,12 @@ void main() {
       XMLNode.fromString(
         '<iq from="user3@server.example" id="abc123" type="result" />',
       ),
-      bareJid,
     );
     expect(result1, false);
     final result2 = await awaiter.onData(
       XMLNode.fromString(
         '<iq from="user1@server.example" id="lol" type="result" />',
       ),
-      bareJid,
     );
     expect(result2, false);
 
@@ -37,22 +36,20 @@ void main() {
     );
     final result3 = await awaiter.onData(
       stanza,
-      bareJid,
     );
     expect(result3, true);
     expect(await future, stanza);
   });
 
   test('Test awaiting an awaited stanza without a from attribute', () async {
-    final awaiter = StanzaAwaiter();
+    final awaiter = StanzaAwaiter(getBareJidCallback);
 
     // "Send" a stanza
-    final future = await awaiter.addPending(bareJid.toString(), 'abc123', 'iq');
+    final future = await awaiter.addPending(null, 'abc123', 'iq');
 
     // Receive the wrong answer
     final result1 = await awaiter.onData(
       XMLNode.fromString('<iq id="lol" type="result" />'),
-      bareJid,
     );
     expect(result1, false);
 
@@ -60,23 +57,21 @@ void main() {
     final stanza = XMLNode.fromString('<iq id="abc123" type="result" />');
     final result2 = await awaiter.onData(
       stanza,
-      bareJid,
     );
     expect(result2, true);
     expect(await future, stanza);
   });
 
   test('Test awaiting a stanza that was already awaited', () async {
-    final awaiter = StanzaAwaiter();
+    final awaiter = StanzaAwaiter(getBareJidCallback);
 
     // "Send" a stanza
-    final future = await awaiter.addPending(bareJid.toString(), 'abc123', 'iq');
+    final future = await awaiter.addPending(null, 'abc123', 'iq');
 
     // Receive the correct answer
     final stanza = XMLNode.fromString('<iq id="abc123" type="result" />');
     final result1 = await awaiter.onData(
       stanza,
-      bareJid,
     );
     expect(result1, true);
     expect(await future, stanza);
@@ -84,31 +79,55 @@ void main() {
     // Receive it again
     final result2 = await awaiter.onData(
       stanza,
-      bareJid,
     );
     expect(result2, false);
   });
 
   test('Test ignoring a stanza that has the wrong tag', () async {
-    final awaiter = StanzaAwaiter();
+    final awaiter = StanzaAwaiter(getBareJidCallback);
 
     // "Send" a stanza
-    final future = await awaiter.addPending(bareJid.toString(), 'abc123', 'iq');
+    final future = await awaiter.addPending(null, 'abc123', 'iq');
 
     // Receive the wrong answer
     final stanza = XMLNode.fromString('<iq id="abc123" type="result" />');
     final result1 = await awaiter.onData(
       XMLNode.fromString('<message id="abc123" type="result" />'),
-      bareJid,
     );
     expect(result1, false);
 
     // Receive the correct answer
     final result2 = await awaiter.onData(
       stanza,
-      bareJid,
     );
     expect(result2, true);
     expect(await future, stanza);
   });
+
+  test('Sending a stanza to our bare JID', () async {
+    final awaiter = StanzaAwaiter(getBareJidCallback);
+
+    // "Send" a stanza
+    final future = await awaiter.addPending(bareJid, 'abc123', 'iq');
+
+    // Receive the response.
+    final stanza = XMLNode.fromString('<iq id="abc123" type="result" />');
+    await awaiter.onData(stanza);
+    expect(await future, stanza);
+  });
+
+  test(
+      'Sending a stanza to our bare JID and receiving stanza with a from attribute',
+      () async {
+    final awaiter = StanzaAwaiter(getBareJidCallback);
+
+    // "Send" a stanza
+    final future = await awaiter.addPending(bareJid, 'abc123', 'iq');
+
+    // Receive the response.
+    final stanza =
+        XMLNode.fromString('<iq from="$bareJid" id="abc123" type="result" />');
+    await awaiter.onData(stanza);
+    expect(await future, stanza);
+  });
 }

packages/moxxmpp/test/xeps/xep_0045_test.dart

@@ -332,4 +332,543 @@ void main() {
       );
     },
   );
+
+  test(
+    'Testing a user joining a room',
+    () async {
+      final fakeSocket = StubTCPSocket([
+        StringExpectation(
+          "<stream:stream xmlns='jabber:client' version='1.0' xmlns:stream='http://etherx.jabber.org/streams' to='test.server' from='polynomdivision@test.server' xml:lang='en'>",
+          '''
+<stream:stream
+    xmlns="jabber:client"
+    version="1.0"
+    xmlns:stream="http://etherx.jabber.org/streams"
+    from="test.server"
+    xml:lang="en">
+  <stream:features xmlns="http://etherx.jabber.org/streams">
+    <mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
+      <mechanism>PLAIN</mechanism>
+    </mechanisms>
+    <bind xmlns="urn:ietf:params:xml:ns:xmpp-bind">
+      <required/>
+    </bind>
+  </stream:features>''',
+        ),
+        StringExpectation(
+          "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>AHBvbHlub21kaXZpc2lvbgBhYWFh</auth>",
+          '<success xmlns="urn:ietf:params:xml:ns:xmpp-sasl" />',
+        ),
+        StringExpectation(
+          "<stream:stream xmlns='jabber:client' version='1.0' xmlns:stream='http://etherx.jabber.org/streams' to='test.server' from='polynomdivision@test.server' xml:lang='en'>",
+          '''
+<stream:stream
+    xmlns="jabber:client"
+    version="1.0"
+    xmlns:stream="http://etherx.jabber.org/streams"
+    from="test.server"
+    xml:lang="en">
+  <stream:features xmlns="http://etherx.jabber.org/streams">
+    <bind xmlns="urn:ietf:params:xml:ns:xmpp-bind">
+      <required/>
+    </bind>
+    <session xmlns="urn:ietf:params:xml:ns:xmpp-session">
+      <optional/>
+    </session>
+    <csi xmlns="urn:xmpp:csi:0"/>
+    <sm xmlns="urn:xmpp:sm:3"/>
+  </stream:features>
+''',
+        ),
+        StanzaExpectation(
+          '<iq xmlns="jabber:client" type="set" id="a"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"/></iq>',
+          '<iq xmlns="jabber:client" type="result" id="a"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><jid>polynomdivision@test.server/MU29eEZn</jid></bind></iq>',
+          ignoreId: true,
+        ),
+        StanzaExpectation(
+          '<presence to="channel@muc.example.org/test" xmlns="jabber:client"><x xmlns="http://jabber.org/protocol/muc"><history maxstanzas="0"/></x></presence>',
+          '',
+          ignoreId: true,
+        ),
+      ]);
+      final conn = XmppConnection(
+        TestingSleepReconnectionPolicy(1),
+        AlwaysConnectedConnectivityManager(),
+        ClientToServerNegotiator(),
+        fakeSocket,
+      )
+        ..connectionSettings = ConnectionSettings(
+          jid: JID.fromString('polynomdivision@test.server'),
+          password: 'aaaa',
+        )
+        ..setResource('test-resource', triggerEvent: false);
+      await conn.registerManagers([
+        DiscoManager([]),
+        MUCManager(),
+      ]);
+
+      await conn.registerFeatureNegotiators([
+        SaslPlainNegotiator(),
+        ResourceBindingNegotiator(),
+      ]);
+
+      await conn.connect(
+        waitUntilLogin: true,
+        shouldReconnect: false,
+      );
+
+      // Join a groupchat
+      final roomJid = JID.fromString('channel@muc.example.org');
+      final joinResult = conn.getManagerById<MUCManager>(mucManager)!.joinRoom(
+            roomJid,
+            'test',
+            maxHistoryStanzas: 0,
+          );
+      await Future<void>.delayed(const Duration(seconds: 1));
+
+      fakeSocket
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/firstwitch'
+           id='3DCB0401-D7CF-4E31-BE05-EDF8D057BFBD'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='owner' role='moderator'/>
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/secondwitch'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23D'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='admin' role='moderator'/>
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/test'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23E'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='member' role='none'/>
+            <status code='110' />
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <message from="channel@muc.example.org" type="groupchat" xmlns="jabber:client">
+          <subject/>
+        </message>
+        ''',
+        );
+
+      await joinResult;
+      final room = (await conn
+          .getManagerById<MUCManager>(mucManager)!
+          .getRoomState(roomJid))!;
+      expect(room.joined, true);
+      expect(
+        room.members.length,
+        2,
+      );
+
+      // Now a new user joins the room.
+      MemberJoinedEvent? event;
+      conn.asBroadcastStream().listen((e) {
+        if (e is MemberJoinedEvent) {
+          event = e;
+        }
+      });
+
+      fakeSocket.injectRawXml(
+        '''
+        <presence
+           from='channel@muc.example.org/papatutuwawa'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23G'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='admin' role='participant'/>
+          </x>
+        </presence>
+        ''',
+      );
+
+      await Future<void>.delayed(const Duration(seconds: 2));
+      expect(event != null, true);
+      expect(event!.member.nick, 'papatutuwawa');
+      expect(event!.member.affiliation, Affiliation.admin);
+      expect(event!.member.role, Role.participant);
+
+      final roomAfterJoin = (await conn
+          .getManagerById<MUCManager>(mucManager)!
+          .getRoomState(roomJid))!;
+      expect(roomAfterJoin.members.length, 3);
+    },
+  );
+
+  test(
+    'Testing a user leaving a room',
+    () async {
+      final fakeSocket = StubTCPSocket([
+        StringExpectation(
+          "<stream:stream xmlns='jabber:client' version='1.0' xmlns:stream='http://etherx.jabber.org/streams' to='test.server' from='polynomdivision@test.server' xml:lang='en'>",
+          '''
+<stream:stream
+    xmlns="jabber:client"
+    version="1.0"
+    xmlns:stream="http://etherx.jabber.org/streams"
+    from="test.server"
+    xml:lang="en">
+  <stream:features xmlns="http://etherx.jabber.org/streams">
+    <mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
+      <mechanism>PLAIN</mechanism>
+    </mechanisms>
+    <bind xmlns="urn:ietf:params:xml:ns:xmpp-bind">
+      <required/>
+    </bind>
+  </stream:features>''',
+        ),
+        StringExpectation(
+          "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>AHBvbHlub21kaXZpc2lvbgBhYWFh</auth>",
+          '<success xmlns="urn:ietf:params:xml:ns:xmpp-sasl" />',
+        ),
+        StringExpectation(
+          "<stream:stream xmlns='jabber:client' version='1.0' xmlns:stream='http://etherx.jabber.org/streams' to='test.server' from='polynomdivision@test.server' xml:lang='en'>",
+          '''
+<stream:stream
+    xmlns="jabber:client"
+    version="1.0"
+    xmlns:stream="http://etherx.jabber.org/streams"
+    from="test.server"
+    xml:lang="en">
+  <stream:features xmlns="http://etherx.jabber.org/streams">
+    <bind xmlns="urn:ietf:params:xml:ns:xmpp-bind">
+      <required/>
+    </bind>
+    <session xmlns="urn:ietf:params:xml:ns:xmpp-session">
+      <optional/>
+    </session>
+    <csi xmlns="urn:xmpp:csi:0"/>
+    <sm xmlns="urn:xmpp:sm:3"/>
+  </stream:features>
+''',
+        ),
+        StanzaExpectation(
+          '<iq xmlns="jabber:client" type="set" id="a"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"/></iq>',
+          '<iq xmlns="jabber:client" type="result" id="a"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><jid>polynomdivision@test.server/MU29eEZn</jid></bind></iq>',
+          ignoreId: true,
+        ),
+        StanzaExpectation(
+          '<presence to="channel@muc.example.org/test" xmlns="jabber:client"><x xmlns="http://jabber.org/protocol/muc"><history maxstanzas="0"/></x></presence>',
+          '',
+          ignoreId: true,
+        ),
+      ]);
+      final conn = XmppConnection(
+        TestingSleepReconnectionPolicy(1),
+        AlwaysConnectedConnectivityManager(),
+        ClientToServerNegotiator(),
+        fakeSocket,
+      )
+        ..connectionSettings = ConnectionSettings(
+          jid: JID.fromString('polynomdivision@test.server'),
+          password: 'aaaa',
+        )
+        ..setResource('test-resource', triggerEvent: false);
+      await conn.registerManagers([
+        DiscoManager([]),
+        MUCManager(),
+      ]);
+
+      await conn.registerFeatureNegotiators([
+        SaslPlainNegotiator(),
+        ResourceBindingNegotiator(),
+      ]);
+
+      await conn.connect(
+        waitUntilLogin: true,
+        shouldReconnect: false,
+      );
+
+      // Join a groupchat
+      final roomJid = JID.fromString('channel@muc.example.org');
+      final joinResult = conn.getManagerById<MUCManager>(mucManager)!.joinRoom(
+            roomJid,
+            'test',
+            maxHistoryStanzas: 0,
+          );
+      await Future<void>.delayed(const Duration(seconds: 1));
+
+      fakeSocket
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/firstwitch'
+           id='3DCB0401-D7CF-4E31-BE05-EDF8D057BFBD'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='owner' role='moderator'/>
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/secondwitch'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23D'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='admin' role='moderator'/>
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/test'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23E'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='member' role='none'/>
+            <status code='110' />
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <message from="channel@muc.example.org" type="groupchat" xmlns="jabber:client">
+          <subject/>
+        </message>
+        ''',
+        );
+
+      await joinResult;
+      final room = (await conn
+          .getManagerById<MUCManager>(mucManager)!
+          .getRoomState(roomJid))!;
+      expect(room.joined, true);
+      expect(
+        room.members.length,
+        2,
+      );
+
+      // Now a user leaves the room.
+      MemberLeftEvent? event;
+      conn.asBroadcastStream().listen((e) {
+        if (e is MemberLeftEvent) {
+          event = e;
+        }
+      });
+
+      fakeSocket.injectRawXml(
+        '''
+        <presence
+           from='channel@muc.example.org/secondwitch'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23G'
+           type='unavailable'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='admin' role='none'/>
+          </x>
+        </presence>
+        ''',
+      );
+
+      await Future<void>.delayed(const Duration(seconds: 2));
+      expect(event != null, true);
+      expect(event!.nick, 'secondwitch');
+
+      final roomAfterLeave = (await conn
+          .getManagerById<MUCManager>(mucManager)!
+          .getRoomState(roomJid))!;
+      expect(roomAfterLeave.members.length, 1);
+    },
+  );
+
+  test(
+    'Test a user changing their nick name',
+    () async {
+      final fakeSocket = StubTCPSocket([
+        StringExpectation(
+          "<stream:stream xmlns='jabber:client' version='1.0' xmlns:stream='http://etherx.jabber.org/streams' to='test.server' from='polynomdivision@test.server' xml:lang='en'>",
+          '''
+<stream:stream
+    xmlns="jabber:client"
+    version="1.0"
+    xmlns:stream="http://etherx.jabber.org/streams"
+    from="test.server"
+    xml:lang="en">
+  <stream:features xmlns="http://etherx.jabber.org/streams">
+    <mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
+      <mechanism>PLAIN</mechanism>
+    </mechanisms>
+    <bind xmlns="urn:ietf:params:xml:ns:xmpp-bind">
+      <required/>
+    </bind>
+  </stream:features>''',
+        ),
+        StringExpectation(
+          "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>AHBvbHlub21kaXZpc2lvbgBhYWFh</auth>",
+          '<success xmlns="urn:ietf:params:xml:ns:xmpp-sasl" />',
+        ),
+        StringExpectation(
+          "<stream:stream xmlns='jabber:client' version='1.0' xmlns:stream='http://etherx.jabber.org/streams' to='test.server' from='polynomdivision@test.server' xml:lang='en'>",
+          '''
+<stream:stream
+    xmlns="jabber:client"
+    version="1.0"
+    xmlns:stream="http://etherx.jabber.org/streams"
+    from="test.server"
+    xml:lang="en">
+  <stream:features xmlns="http://etherx.jabber.org/streams">
+    <bind xmlns="urn:ietf:params:xml:ns:xmpp-bind">
+      <required/>
+    </bind>
+    <session xmlns="urn:ietf:params:xml:ns:xmpp-session">
+      <optional/>
+    </session>
+    <csi xmlns="urn:xmpp:csi:0"/>
+    <sm xmlns="urn:xmpp:sm:3"/>
+  </stream:features>
+''',
+        ),
+        StanzaExpectation(
+          '<iq xmlns="jabber:client" type="set" id="a"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"/></iq>',
+          '<iq xmlns="jabber:client" type="result" id="a"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><jid>polynomdivision@test.server/MU29eEZn</jid></bind></iq>',
+          ignoreId: true,
+        ),
+        StanzaExpectation(
+          '<presence to="channel@muc.example.org/test" xmlns="jabber:client"><x xmlns="http://jabber.org/protocol/muc"><history maxstanzas="0"/></x></presence>',
+          '',
+          ignoreId: true,
+        ),
+      ]);
+      final conn = XmppConnection(
+        TestingSleepReconnectionPolicy(1),
+        AlwaysConnectedConnectivityManager(),
+        ClientToServerNegotiator(),
+        fakeSocket,
+      )
+        ..connectionSettings = ConnectionSettings(
+          jid: JID.fromString('polynomdivision@test.server'),
+          password: 'aaaa',
+        )
+        ..setResource('test-resource', triggerEvent: false);
+      await conn.registerManagers([
+        DiscoManager([]),
+        MUCManager(),
+      ]);
+
+      await conn.registerFeatureNegotiators([
+        SaslPlainNegotiator(),
+        ResourceBindingNegotiator(),
+      ]);
+
+      await conn.connect(
+        waitUntilLogin: true,
+        shouldReconnect: false,
+      );
+
+      // Join a groupchat
+      final roomJid = JID.fromString('channel@muc.example.org');
+      final joinResult = conn.getManagerById<MUCManager>(mucManager)!.joinRoom(
+            roomJid,
+            'test',
+            maxHistoryStanzas: 0,
+          );
+      await Future<void>.delayed(const Duration(seconds: 1));
+
+      fakeSocket
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/firstwitch'
+           id='3DCB0401-D7CF-4E31-BE05-EDF8D057BFBD'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='owner' role='moderator'/>
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/secondwitch'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23D'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='admin' role='moderator'/>
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <presence
+           from='channel@muc.example.org/test'
+           id='C2CD9EE3-8421-431E-854A-A2AD0CE2E23E'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='member' role='none'/>
+            <status code='110' />
+          </x>
+        </presence>
+        ''',
+        )
+        ..injectRawXml(
+          '''
+        <message from="channel@muc.example.org" type="groupchat" xmlns="jabber:client">
+          <subject/>
+        </message>
+        ''',
+        );
+
+      await joinResult;
+      final room = (await conn
+          .getManagerById<MUCManager>(mucManager)!
+          .getRoomState(roomJid))!;
+      expect(room.joined, true);
+      expect(
+        room.members.length,
+        2,
+      );
+
+      // Now a new user changes their nick.
+      MemberChangedNickEvent? event;
+      conn.asBroadcastStream().listen((e) {
+        if (e is MemberChangedNickEvent) {
+          event = e;
+        }
+      });
+
+      fakeSocket.injectRawXml(
+        '''
+        <presence
+           from='channel@muc.example.org/firstwitch'
+           id='3DCB0401-D7CF-4E31-BE05-EDF8D057BFBD'
+           type='unavailable'>
+          <x xmlns='http://jabber.org/protocol/muc#user'>
+            <item affiliation='owner' role='moderator' nick='papatutuwawa'/>
+            <status code='303'/>
+          </x>
+        </presence>
+        ''',
+      );
+
+      await Future<void>.delayed(const Duration(seconds: 2));
+      expect(event != null, true);
+      expect(event!.oldNick, 'firstwitch');
+      expect(event!.newNick, 'papatutuwawa');
+
+      final roomAfterChange = (await conn
+          .getManagerById<MUCManager>(mucManager)!
+          .getRoomState(roomJid))!;
+      expect(roomAfterChange.members.length, 2);
+      expect(roomAfterChange.members['firstwitch'], null);
+      expect(roomAfterChange.members['papatutuwawa'] != null, true);
+    },
+  );
 }

packages/moxxmpp/test/xeps/xep_0115_test.dart

@@ -343,6 +343,7 @@ void main() {
         stanza,
         StanzaHandlerData(false, false, stanza, TypedMap()),
       );
+      await Future<void>.delayed(const Duration(seconds: 2));
 
       expect(
         await manager.getCachedDiscoInfoFromJid(aliceJid) != null,
@@ -513,6 +514,7 @@ void main() {
         stanza,
         StanzaHandlerData(false, false, stanza, TypedMap()),
       );
+      await Future<void>.delayed(const Duration(seconds: 2));
 
       final cachedItem = await manager.getCachedDiscoInfoFromJid(aliceJid);
       expect(
@@ -549,6 +551,7 @@ void main() {
         stanza,
         StanzaHandlerData(false, false, stanza, TypedMap()),
       );
+      await Future<void>.delayed(const Duration(seconds: 2));
 
       final cachedItem = await manager.getCachedDiscoInfoFromJid(aliceJid);
       expect(

packages/moxxmpp/test/xmpp_parser_test.dart

@@ -11,8 +11,9 @@ void main() {
     final controller = StreamController<String>();
 
     unawaited(
-      controller.stream.transform(parser).forEach((event) {
+      controller.stream.transform(parser).forEach((events) {
-        if (event is! XMPPStreamElement) return;
+        for (final event in events) {
+          if (event is! XMPPStreamElement) continue;
           final node = event.node;
 
           if (node.tag == 'childa') {
@@ -20,6 +21,7 @@ void main() {
           } else if (node.tag == 'childb') {
             childb = true;
           }
+        }
       }),
     );
     controller.add('<childa /><childb />');
@@ -36,8 +38,9 @@ void main() {
     final controller = StreamController<String>();
 
     unawaited(
-      controller.stream.transform(parser).forEach((event) {
+      controller.stream.transform(parser).forEach((events) {
-        if (event is! XMPPStreamElement) return;
+        for (final event in events) {
+          if (event is! XMPPStreamElement) continue;
           final node = event.node;
 
           if (node.tag == 'childa') {
@@ -45,6 +48,7 @@ void main() {
           } else if (node.tag == 'childb') {
             childb = true;
           }
+        }
       }),
     );
     controller
@@ -64,8 +68,9 @@ void main() {
     final controller = StreamController<String>();
 
     unawaited(
-      controller.stream.transform(parser).forEach((event) {
+      controller.stream.transform(parser).forEach((events) {
-        if (event is! XMPPStreamElement) return;
+        for (final event in events) {
+          if (event is! XMPPStreamElement) continue;
           final node = event.node;
 
           if (node.tag == 'childa') {
@@ -73,6 +78,7 @@ void main() {
           } else if (node.tag == 'childb') {
             childb = true;
           }
+        }
       }),
     );
     controller
@@ -93,13 +99,15 @@ void main() {
     final controller = StreamController<String>();
 
     unawaited(
-      controller.stream.transform(parser).forEach((node) {
+      controller.stream.transform(parser).forEach((events) {
-        if (node is XMPPStreamElement) {
+        for (final event in events) {
-          if (node.node.tag == 'childa') {
+          if (event is XMPPStreamElement) {
+            if (event.node.tag == 'childa') {
               childa = true;
             }
-        } else if (node is XMPPStreamHeader) {
+          } else if (event is XMPPStreamHeader) {
-          attrs = node.attributes;
+            attrs = event.attributes;
+          }
         }
       }),
     );
@@ -118,12 +126,14 @@ void main() {
     var gotFeatures = false;
     unawaited(
       controller.stream.transform(parser).forEach(
-        (event) {
+        (events) {
-          if (event is! XMPPStreamElement) return;
+          for (final event in events) {
+            if (event is! XMPPStreamElement) continue;
 
             if (event.node.tag == 'stream:features') {
               gotFeatures = true;
             }
+          }
         },
       ),
     );
@@ -157,4 +167,27 @@ void main() {
     await Future<void>.delayed(const Duration(seconds: 1));
     expect(gotFeatures, true);
   });
+
+  test('Test the order of concatenated stanzas', () async {
+    // NOTE: This seems weird, but it turns out that not keeping this order leads to
+    //       MUC joins (on Moxxy) not catching every bit of presence before marking the
+    //       MUC as joined.
+    final parser = XMPPStreamParser();
+    final controller = StreamController<String>();
+    var called = false;
+
+    unawaited(
+      controller.stream.transform(parser).forEach((events) {
+        expect(events.isNotEmpty, true);
+        expect((events[0] as XMPPStreamElement).node.tag, 'childa');
+        expect((events[1] as XMPPStreamElement).node.tag, 'childb');
+        expect((events[2] as XMPPStreamElement).node.tag, 'childc');
+        called = true;
+      }),
+    );
+    controller.add('<childa /><childb /><childc />');
+
+    await Future<void>.delayed(const Duration(seconds: 2));
+    expect(called, true);
+  });
 }

packages/moxxmpp_socket_tcp/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.4.0
+
+- Keep version in sync with moxxmpp
+- *BREAKING*: `TCPSocketWrapper` now takes a boolean parameter that enables logging of all incoming and outgoing data.
+
 ## 0.3.1
 
 - Keep version in sync with moxxmpp

packages/moxxmpp_socket_tcp/integration_test/badxmpp_certificate_test.dart

@@ -5,7 +5,7 @@ import 'package:test/test.dart';
 
 Future<void> _runTest(String domain) async {
   var gotTLSException = false;
-  final socket = TCPSocketWrapper();
+  final socket = TCPSocketWrapper(true);
   final log = Logger('TestLogger');
   socket.getEventStream().listen((event) {
     if (event is XmppSocketTLSFailedEvent) {

packages/moxxmpp_socket_tcp/integration_test/failure_reconnection_test.dart

@@ -19,7 +19,7 @@ void main() {
         TestingSleepReconnectionPolicy(10),
         AlwaysConnectedConnectivityManager(),
         ClientToServerNegotiator(),
-        TCPSocketWrapper(),
+        TCPSocketWrapper(true),
       )..connectionSettings = ConnectionSettings(
           jid: JID.fromString('testuser@no-sasl.badxmpp.eu'),
           password: 'abc123',
@@ -59,7 +59,7 @@ void main() {
         TestingReconnectionPolicy(),
         AlwaysConnectedConnectivityManager(),
         ClientToServerNegotiator(),
-        TCPSocketWrapper(),
+        TCPSocketWrapper(true),
       )..connectionSettings = ConnectionSettings(
           jid: JID.fromString('testuser@no-sasl.badxmpp.eu'),
           password: 'abc123',

packages/moxxmpp_socket_tcp/lib/src/socket.dart

@@ -10,6 +10,11 @@ import 'package:moxxmpp_socket_tcp/src/rfc_2782.dart';
 
 /// TCP socket implementation for XmppConnection
 class TCPSocketWrapper extends BaseSocketWrapper {
+  TCPSocketWrapper(this._logIncomingOutgoing);
+
+  /// Flag controlling whether incoming/outgoing data is logged or not.
+  final bool _logIncomingOutgoing;
+
   /// The underlying Socket/SecureSocket instance.
   Socket? _socket;
 
@@ -212,7 +217,9 @@ class TCPSocketWrapper extends BaseSocketWrapper {
     _socketSubscription = _socket!.listen(
       (List<int> event) {
         final data = utf8.decode(event);
+        if (_logIncomingOutgoing) {
           _log.finest('<== $data');
+        }
         _dataStream.add(data);
       },
       onError: (Object error) {
@@ -297,7 +304,9 @@ class TCPSocketWrapper extends BaseSocketWrapper {
       return;
     }
 
+    if (_logIncomingOutgoing) {
       _log.finest('==> $data');
+    }
 
     try {
       _socket!.write(data);

packages/moxxmpp_socket_tcp/pubspec.yaml

@@ -1,6 +1,6 @@
 name: moxxmpp_socket_tcp
 description: A socket for moxxmpp using TCP that implements the RFC6120 connection algorithm and XEP-0368
-version: 0.3.1
+version: 0.4.0
 homepage: https://codeberg.org/moxxy/moxxmpp
 publish_to: https://git.polynom.me/api/packages/Moxxy/pub