/// <summary>
/// Called once the connection timer got triggered.
/// </summary>
private async Task OnConnetionTimerTimeoutAsync()
{
string errorMessage = "Connection timeout got triggered for account: " + account.getBareJid();
Logger.Warn(LOGGER_TAG + errorMessage);
lastConnectionError = new ConnectionError(ConnectionErrorCode.XMPP_CONNECTION_TIMEOUT, errorMessage);
await OnConnectionErrorAsync();
}
/// <summary>
/// Called once the connection timer got triggered.
/// </summary>
private async Task onConnetionTimerTimeoutAsync()
{
string errorMessage = "Connection timeout got triggered for account: " + account.getIdAndDomain();
Logger.Warn(errorMessage);
lastConnectionError = new ConnectionError(ConnectionErrorCode.XMPP_CONNECTION_TIMEOUT, errorMessage);
await onConnectionErrorAsync();
}
private async void TCPConnection_ConnectionStateChanged(AbstractConnection2 connection, ConnectionStateChangedEventArgs args)
{
switch (args.newState)
{
case ConnectionState.CONNECTED:
// TCP connection established start reading:
TCP_CONNECTION.startReaderTask();
// Send initial stream header:
await softRestartAsync();
break;
case ConnectionState.ERROR:
if (args.param is ConnectionError cError)
{
lastConnectionError = cError;
}
if (args.oldState == ConnectionState.CONNECTED)
{
switch (state)
{
case ConnectionState.CONNECTING:
case ConnectionState.CONNECTED:
await onConnectionErrorAsync();
break;
case ConnectionState.DISCONNECTING:
setState(ConnectionState.DISCONNECTED);
break;
}
}
else
{
// Unable to connect to server:
connectionErrorCount = 3;
await internalDisconnectAsync();
setState(ConnectionState.ERROR, args.param);
}
break;
case ConnectionState.DISCONNECTED when holdConnection:
await reconnectAsync(false);
break;
}
}
//--------------------------------------------------------Set-, Get- Methods:---------------------------------------------------------\\
#region --Set-, Get- Methods--
protected override void setState(ConnectionState newState, object param)
{
base.setState(newState, param);
switch (newState)
{
case ConnectionState.DISCONNECTED:
onDisconnected();
break;
case ConnectionState.CONNECTED:
// Reset last error message:
lastConnectionError = null;
break;
}
}
//--------------------------------------------------------Constructor:----------------------------------------------------------------\\
#region --Constructors--
/// <summary>
/// Basic Constructor
/// </summary>
/// <history>
/// 05/05/2018 Created [Fabian Sauter]
/// </history>
public XMPPConnection2(XMPPAccount account) : base(account)
{
this.holdConnection = false;
this.connectionErrorCount = 0;
this.lastConnectionError = null;
this.TCP_CONNECTION = new TCPConnection2(account);
this.TCP_CONNECTION.ConnectionStateChanged += TCPConnection_ConnectionStateChanged;
this.TCP_CONNECTION.NewDataReceived += TCPConnection_NewDataReceived;
this.PARSER = new MessageParser2();
this.MESSAGE_PROCESSORS = new AbstractMessageProcessor[4];
this.streamId = null;
this.messageIdCache = new TSTimedList <string>();
this.connectionTimer = null;
this.reconnectRequested = false;
this.timeout = TimeSpan.FromMilliseconds(CONNECTION_TIMEOUT);
this.GENERAL_COMMAND_HELPER = new GeneralCommandHelper(this);
this.MUC_COMMAND_HELPER = new MUCCommandHelper(this);
this.PUB_SUB_COMMAND_HELPER = new PubSubCommandHelper(this);
this.OMEMO_COMMAND_HELPER = new OmemoCommandHelper(this);
// The order in which new messages should get processed (TLS -- SASL -- Stream Management -- Resource binding -- ...).
// https://xmpp.org/extensions/xep-0170.html
//-------------------------------------------------------------
// TLS:
this.MESSAGE_PROCESSORS[0] = new TLSConnection(TCP_CONNECTION, this);
// SASL:
this.MESSAGE_PROCESSORS[1] = new SASLConnection(TCP_CONNECTION, this);
// XEP-0198 (Stream Management):
this.MESSAGE_PROCESSORS[2] = new SMConnection(TCP_CONNECTION, this);
// Resource binding:
RecourceBindingConnection recourceBindingConnection = new RecourceBindingConnection(TCP_CONNECTION, this);
recourceBindingConnection.ResourceBound += RecourceBindingConnection_ResourceBound;
this.MESSAGE_PROCESSORS[3] = recourceBindingConnection;
//-------------------------------------------------------------
NetworkHelper.Instance.NetworkChanged += Instance_NetworkChanged;
this.omemoHelper = null;
this.DISCO_FEATURE_HELPER = new DiscoFeatureHelper(this);
}
/// <summary>
/// Connects to the XMPP server.
/// </summary>
private async Task connectAsync()
{
if (!NetworkHelper.Instance.ConnectionInformation.IsInternetAvailable)
{
connectionErrorCount = 3;
lastConnectionError = new ConnectionError(ConnectionErrorCode.NO_INTERNET);
setState(ConnectionState.ERROR, lastConnectionError);
reconnectRequested = false;
holdConnection = false;
Logger.Warn("[XMPPConnection2]: Unable to connect to " + account.serverAddress + " - no internet!");
return;
}
switch (state)
{
case ConnectionState.DISCONNECTED:
case ConnectionState.ERROR:
if (connectionErrorCount < 3)
{
setState(ConnectionState.CONNECTING);
// Reset stuff:
streamId = null;
messageIdCache = new TSTimedList <string>();
resetMessageProcessors();
await TCP_CONNECTION.connectAsync();
}
break;
default:
Logger.Warn("[XMPPConnection2]: Trying to connect but state is not " + ConnectionState.DISCONNECTED + " or " + ConnectionState.ERROR + "! State = " + state);
await reconnectAsync(false);
break;
}
}
/// <summary>
/// Parses the given messages and invokes the ConnectionNewValidMessage event for each message.
/// </summary>
/// <param name="data">The messages string to parse.</param>
private async Task ParseMessageAsync(string data)
{
// Parse message:
List <AbstractMessage> messages = null;
try
{
messages = PARSER.parseMessages(ref data);
}
catch (Exception e)
{
Logger.Error("[XMPPConnection2]: Error during message parsing." + e);
return;
}
// Process messages:
foreach (AbstractMessage msg in messages)
{
// Stream error messages:
if (msg is StreamErrorMessage errorMessage)
{
Logger.Warn("[XMPPConnection2]: Received stream error message: " + errorMessage.ToString());
lastConnectionError = new ConnectionError(ConnectionErrorCode.SERVER_ERROR, errorMessage.ToString());
await OnConnectionErrorAsync();
await SendStreamCloseMessageAsync();
return;
}
// Filter IQ messages which ids are not valid:
if (msg is IQMessage iq)
{
if (iq.GetType().Equals(IQMessage.RESULT) && messageIdCache.GetTimed(iq.ID) != null)
{
Logger.Warn("[XMPPConnection2]: Invalid message id received!");
return;
}
}
// Respond to XEP-0199 (XMPP Ping) messages:
if (msg is PingMessage pingMsg)
{
Logger.Debug("[XMPPConnection2]: XMPP ping received from " + pingMsg.getFrom());
await SendAsync(pingMsg.generateResponse(), true);
}
// Invoke message processors:
NewValidMessage?.Invoke(this, new NewValidMessageEventArgs(msg));
// Should restart connection?
if (msg.getRestartConnection() != AbstractMessage.NO_RESTART)
{
if (msg.getRestartConnection() == AbstractMessage.SOFT_RESTART)
{
await SoftRestartAsync();
}
else if (msg.getRestartConnection() == AbstractMessage.HARD_RESTART)
{
await HardRestartAsync();
}
else
{
throw new ArgumentException("[XMPPConnection2]: Invalid restart type: " + msg.getRestartConnection());
}
}
// Filter already processed messages:
if (msg.isProcessed())
{
return;
}
// --------------------------------------------------------------------
// Open stream:
if (msg is OpenStreamAnswerMessage oA)
{
if (oA.ID is null)
{
// TODO Handle OpenStreamAnswerMessage id is null
//Error throw exception?!
return;
}
}
// Close stream message:
else if (msg is CloseStreamMessage)
{
switch (state)
{
case ConnectionState.CONNECTING:
case ConnectionState.CONNECTED:
await InternalDisconnectAsync(false);
break;
}
}
// Rooster:
else if (msg is RosterResultMessage)
{
NewRoosterMessage?.Invoke(this, new NewValidMessageEventArgs(msg));
}
// Presence:
else if (msg is PresenceMessage presenceMessage && !(presenceMessage.getFrom() is null))
{
NewPresenceMessage?.Invoke(this, new NewValidMessageEventArgs(msg));
}