1907 lines
85 KiB
Java
1907 lines
85 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.tcp;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.io.Writer;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.Socket;
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import java.security.cert.CertificateException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.LinkedHashSet;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.ArrayBlockingQueue;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentLinkedQueue;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.net.SocketFactory;
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import javax.net.ssl.HostnameVerifier;
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import javax.net.ssl.SSLSession;
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import javax.net.ssl.SSLSocket;
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import javax.net.ssl.SSLSocketFactory;
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import org.jivesoftware.smack.AbstractXMPPConnection;
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import org.jivesoftware.smack.ConnectionConfiguration;
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import org.jivesoftware.smack.ConnectionConfiguration.SecurityMode;
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import org.jivesoftware.smack.ConnectionListener;
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import org.jivesoftware.smack.SmackConfiguration;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.SmackException.AlreadyConnectedException;
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import org.jivesoftware.smack.SmackException.AlreadyLoggedInException;
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import org.jivesoftware.smack.SmackException.ConnectionException;
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import org.jivesoftware.smack.SmackException.EndpointConnectionException;
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import org.jivesoftware.smack.SmackException.NotConnectedException;
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import org.jivesoftware.smack.SmackException.NotLoggedInException;
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import org.jivesoftware.smack.SmackException.SecurityNotPossibleException;
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import org.jivesoftware.smack.SmackException.SecurityRequiredByServerException;
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import org.jivesoftware.smack.SmackFuture;
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import org.jivesoftware.smack.StanzaListener;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.XMPPException.FailedNonzaException;
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import org.jivesoftware.smack.XMPPException.StreamErrorException;
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import org.jivesoftware.smack.compress.packet.Compress;
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import org.jivesoftware.smack.compress.packet.Compressed;
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import org.jivesoftware.smack.compression.XMPPInputOutputStream;
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import org.jivesoftware.smack.datatypes.UInt16;
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import org.jivesoftware.smack.filter.StanzaFilter;
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import org.jivesoftware.smack.internal.SmackTlsContext;
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import org.jivesoftware.smack.packet.Element;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.packet.Message;
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import org.jivesoftware.smack.packet.Nonza;
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import org.jivesoftware.smack.packet.Presence;
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import org.jivesoftware.smack.packet.Stanza;
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import org.jivesoftware.smack.packet.StartTls;
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import org.jivesoftware.smack.packet.StreamError;
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import org.jivesoftware.smack.packet.StreamOpen;
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import org.jivesoftware.smack.proxy.ProxyInfo;
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import org.jivesoftware.smack.sasl.packet.SaslNonza;
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import org.jivesoftware.smack.sm.SMUtils;
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import org.jivesoftware.smack.sm.StreamManagementException;
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import org.jivesoftware.smack.sm.StreamManagementException.StreamIdDoesNotMatchException;
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import org.jivesoftware.smack.sm.StreamManagementException.StreamManagementCounterError;
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import org.jivesoftware.smack.sm.StreamManagementException.StreamManagementNotEnabledException;
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import org.jivesoftware.smack.sm.packet.StreamManagement;
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import org.jivesoftware.smack.sm.packet.StreamManagement.AckAnswer;
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import org.jivesoftware.smack.sm.packet.StreamManagement.AckRequest;
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import org.jivesoftware.smack.sm.packet.StreamManagement.Enable;
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import org.jivesoftware.smack.sm.packet.StreamManagement.Enabled;
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import org.jivesoftware.smack.sm.packet.StreamManagement.Failed;
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import org.jivesoftware.smack.sm.packet.StreamManagement.Resume;
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import org.jivesoftware.smack.sm.packet.StreamManagement.Resumed;
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import org.jivesoftware.smack.sm.packet.StreamManagement.StreamManagementFeature;
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import org.jivesoftware.smack.sm.predicates.Predicate;
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import org.jivesoftware.smack.sm.provider.ParseStreamManagement;
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import org.jivesoftware.smack.tcp.rce.RemoteXmppTcpConnectionEndpoints;
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import org.jivesoftware.smack.tcp.rce.Rfc6120TcpRemoteConnectionEndpoint;
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import org.jivesoftware.smack.util.ArrayBlockingQueueWithShutdown;
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import org.jivesoftware.smack.util.Async;
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import org.jivesoftware.smack.util.CloseableUtil;
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import org.jivesoftware.smack.util.PacketParserUtils;
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import org.jivesoftware.smack.util.StringUtils;
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import org.jivesoftware.smack.util.TLSUtils;
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import org.jivesoftware.smack.util.XmlStringBuilder;
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import org.jivesoftware.smack.util.rce.RemoteConnectionException;
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import org.jivesoftware.smack.xml.SmackXmlParser;
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import org.jivesoftware.smack.xml.XmlPullParser;
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import org.jivesoftware.smack.xml.XmlPullParserException;
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import org.jxmpp.jid.impl.JidCreate;
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import org.jxmpp.jid.parts.Resourcepart;
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import org.jxmpp.stringprep.XmppStringprepException;
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import org.minidns.dnsname.DnsName;
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/**
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* Creates a socket connection to an XMPP server. This is the default connection
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* to an XMPP server and is specified in the XMPP Core (RFC 6120).
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*
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* @see XMPPConnection
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* @author Matt Tucker
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*/
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public class XMPPTCPConnection extends AbstractXMPPConnection {
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private static final int QUEUE_SIZE = 500;
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private static final Logger LOGGER = Logger.getLogger(XMPPTCPConnection.class.getName());
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/**
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* The socket which is used for this connection.
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*/
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private Socket socket;
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/**
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*
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*/
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private boolean disconnectedButResumeable = false;
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private SSLSocket secureSocket;
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/**
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* Protected access level because of unit test purposes
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*/
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protected final PacketWriter packetWriter = new PacketWriter();
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/**
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* Protected access level because of unit test purposes
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*/
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protected final PacketReader packetReader = new PacketReader();
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/**
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*
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*/
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private boolean streamFeaturesAfterAuthenticationReceived;
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/**
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*
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*/
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private boolean compressSyncPoint;
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/**
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* The default bundle and defer callback, used for new connections.
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* @see bundleAndDeferCallback
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*/
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private static BundleAndDeferCallback defaultBundleAndDeferCallback;
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/**
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* The used bundle and defer callback.
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* <p>
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* Although this field may be set concurrently, the 'volatile' keyword was deliberately not added, in order to avoid
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* having a 'volatile' read within the writer threads loop.
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* </p>
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*/
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private BundleAndDeferCallback bundleAndDeferCallback = defaultBundleAndDeferCallback;
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private static boolean useSmDefault = true;
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private static boolean useSmResumptionDefault = true;
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/**
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* The stream ID of the stream that is currently resumable, ie. the stream we hold the state
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* for in {@link #clientHandledStanzasCount}, {@link #serverHandledStanzasCount} and
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* {@link #unacknowledgedStanzas}.
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*/
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private String smSessionId;
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/**
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* Represents the state of stream management resumption.
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* <p>
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* Unlike other sync points, this sync point is marked volatile because it is also read by the reader thread.
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* </p>
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*/
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private volatile SyncPointState smResumedSyncPoint;
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private Failed smResumptionFailed;
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/**
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* Represents the state of stream magement.
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* <p>
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* This boolean is marked volatile as it is read by various threads, including the reader thread via {@link #isSmEnabled()}.
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* </p>
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*/
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private volatile boolean smEnabledSyncPoint;
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/**
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* The client's preferred maximum resumption time in seconds.
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*/
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private int smClientMaxResumptionTime = -1;
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/**
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* The server's preferred maximum resumption time in seconds.
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*/
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private int smServerMaxResumptionTime = -1;
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/**
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* Indicates whether Stream Management (XEP-198) should be used if it's supported by the server.
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*/
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private boolean useSm = useSmDefault;
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private boolean useSmResumption = useSmResumptionDefault;
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/**
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* The counter that the server sends the client about it's current height. For example, if the server sends
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* {@code <a h='42'/>}, then this will be set to 42 (while also handling the {@link #unacknowledgedStanzas} queue).
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*/
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private long serverHandledStanzasCount = 0;
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/**
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* The counter for stanzas handled ("received") by the client.
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* <p>
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* Note that we don't need to synchronize this counter. Although JLS 17.7 states that reads and writes to longs are
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* not atomic, it guarantees that there are at most 2 separate writes, one to each 32-bit half. And since
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* {@link SMUtils#incrementHeight(long)} masks the lower 32 bit, we only operate on one half of the long and
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* therefore have no concurrency problem because the read/write operations on one half are guaranteed to be atomic.
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* </p>
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*/
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private long clientHandledStanzasCount = 0;
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private BlockingQueue<Stanza> unacknowledgedStanzas;
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/**
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* Set to true if Stream Management was at least once enabled for this connection.
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*/
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private boolean smWasEnabledAtLeastOnce = false;
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/**
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* This listeners are invoked for every stanza that got acknowledged.
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* <p>
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* We use a {@link ConcurrentLinkedQueue} here in order to allow the listeners to remove
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* themselves after they have been invoked.
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* </p>
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*/
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private final Collection<StanzaListener> stanzaAcknowledgedListeners = new ConcurrentLinkedQueue<>();
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/**
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* These listeners are invoked for every stanza that got dropped.
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* <p>
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* We use a {@link ConcurrentLinkedQueue} here in order to allow the listeners to remove
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* themselves after they have been invoked.
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* </p>
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*/
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private final Collection<StanzaListener> stanzaDroppedListeners = new ConcurrentLinkedQueue<>();
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/**
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* This listeners are invoked for a acknowledged stanza that has the given stanza ID. They will
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* only be invoked once and automatically removed after that.
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*/
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private final Map<String, StanzaListener> stanzaIdAcknowledgedListeners = new ConcurrentHashMap<>();
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/**
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* Predicates that determine if an stream management ack should be requested from the server.
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* <p>
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* We use a linked hash set here, so that the order how the predicates are added matches the
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* order in which they are invoked in order to determine if an ack request should be send or not.
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* </p>
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*/
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private final Set<StanzaFilter> requestAckPredicates = new LinkedHashSet<>();
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@SuppressWarnings("HidingField")
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private final XMPPTCPConnectionConfiguration config;
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/**
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* Creates a new XMPP connection over TCP (optionally using proxies).
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* <p>
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* Note that XMPPTCPConnection constructors do not establish a connection to the server
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* and you must call {@link #connect()}.
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* </p>
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*
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* @param config the connection configuration.
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*/
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public XMPPTCPConnection(XMPPTCPConnectionConfiguration config) {
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super(config);
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this.config = config;
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addConnectionListener(new ConnectionListener() {
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@Override
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public void connectionClosedOnError(Exception e) {
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if (e instanceof XMPPException.StreamErrorException || e instanceof StreamManagementException) {
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dropSmState();
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}
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}
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});
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// Re-init the reader and writer in case of SASL <success/>. This is done to reset the parser since a new stream
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// is initiated.
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buildNonzaCallback().listenFor(SaslNonza.Success.class, s -> resetParser()).install();
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}
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/**
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* Creates a new XMPP connection over TCP.
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* <p>
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* Note that {@code jid} must be the bare JID, e.g. "user@example.org". More fine-grained control over the
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* connection settings is available using the {@link #XMPPTCPConnection(XMPPTCPConnectionConfiguration)}
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* constructor.
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* </p>
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*
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* @param jid the bare JID used by the client.
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* @param password the password or authentication token.
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* @throws XmppStringprepException if the provided string is invalid.
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*/
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public XMPPTCPConnection(CharSequence jid, String password) throws XmppStringprepException {
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this(XMPPTCPConnectionConfiguration.builder().setXmppAddressAndPassword(jid, password).build());
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}
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/**
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* Creates a new XMPP connection over TCP.
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* <p>
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* This is the simplest constructor for connecting to an XMPP server. Alternatively,
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* you can get fine-grained control over connection settings using the
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* {@link #XMPPTCPConnection(XMPPTCPConnectionConfiguration)} constructor.
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* </p>
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* @param username TODO javadoc me please
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* @param password TODO javadoc me please
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* @param serviceName TODO javadoc me please
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* @throws XmppStringprepException if the provided string is invalid.
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*/
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public XMPPTCPConnection(CharSequence username, String password, String serviceName) throws XmppStringprepException {
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this(XMPPTCPConnectionConfiguration.builder().setUsernameAndPassword(username, password).setXmppDomain(
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JidCreate.domainBareFrom(serviceName)).build());
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}
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@Override
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protected void throwNotConnectedExceptionIfAppropriate() throws NotConnectedException {
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if (packetWriter == null) {
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throw new NotConnectedException();
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}
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packetWriter.throwNotConnectedExceptionIfDoneAndResumptionNotPossible();
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}
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@Override
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protected void throwAlreadyConnectedExceptionIfAppropriate() throws AlreadyConnectedException {
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if (isConnected() && !disconnectedButResumeable) {
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throw new AlreadyConnectedException();
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}
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}
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@Override
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protected void throwAlreadyLoggedInExceptionIfAppropriate() throws AlreadyLoggedInException {
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if (isAuthenticated() && !disconnectedButResumeable) {
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throw new AlreadyLoggedInException();
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}
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}
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@Override
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protected void afterSuccessfulLogin(final boolean resumed) throws NotConnectedException, InterruptedException {
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// Reset the flag in case it was set
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disconnectedButResumeable = false;
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super.afterSuccessfulLogin(resumed);
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}
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@Override
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protected synchronized void loginInternal(String username, String password, Resourcepart resource) throws XMPPException,
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SmackException, IOException, InterruptedException {
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// Authenticate using SASL
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SSLSession sslSession = secureSocket != null ? secureSocket.getSession() : null;
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streamFeaturesAfterAuthenticationReceived = false;
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authenticate(username, password, config.getAuthzid(), sslSession);
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// Wait for stream features after the authentication.
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// TODO: The name of this synchronization point "maybeCompressFeaturesReceived" is not perfect. It should be
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// renamed to "streamFeaturesAfterAuthenticationReceived".
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waitForConditionOrThrowConnectionException(() -> streamFeaturesAfterAuthenticationReceived, "compress features from server");
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// If compression is enabled then request the server to use stream compression. XEP-170
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// recommends to perform stream compression before resource binding.
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maybeEnableCompression();
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smResumedSyncPoint = SyncPointState.initial;
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smResumptionFailed = null;
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if (isSmResumptionPossible()) {
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smResumedSyncPoint = SyncPointState.request_sent;
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sendNonza(new Resume(clientHandledStanzasCount, smSessionId));
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waitForConditionOrConnectionException(() -> smResumedSyncPoint == SyncPointState.successful || smResumptionFailed != null, "resume previous stream");
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if (smResumedSyncPoint == SyncPointState.successful) {
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// We successfully resumed the stream, be done here
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afterSuccessfulLogin(true);
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return;
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}
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// SM resumption failed, what Smack does here is to report success of
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// lastFeaturesReceived in case of sm resumption was answered with 'failed' so that
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// normal resource binding can be tried.
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assert smResumptionFailed != null;
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LOGGER.fine("Stream resumption failed, continuing with normal stream establishment process: " + smResumptionFailed);
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}
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// We either failed to resume a previous stream management (SM) session, or we did not even try. In any case,
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// mark SM as not enabled. Most importantly, we do this prior calling bindResourceAndEstablishSession(), as the
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// bind IQ may trigger a SM ack request, which would be invalid in the pre resource bound state.
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smEnabledSyncPoint = false;
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List<Stanza> previouslyUnackedStanzas = new LinkedList<Stanza>();
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if (unacknowledgedStanzas != null) {
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// There was a previous connection with SM enabled but that was either not resumable or
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// failed to resume. Make sure that we (re-)send the unacknowledged stanzas.
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unacknowledgedStanzas.drainTo(previouslyUnackedStanzas);
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// Reset unacknowledged stanzas to 'null' to signal that we never send 'enable' in this
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// XMPP session (There maybe was an enabled in a previous XMPP session of this
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// connection instance though). This is used in writePackets to decide if stanzas should
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// be added to the unacknowledged stanzas queue, because they have to be added right
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// after the 'enable' stream element has been sent.
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dropSmState();
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}
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// Now bind the resource. It is important to do this *after* we dropped an eventually
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// existing Stream Management state. As otherwise <bind/> and <session/> may end up in
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// unacknowledgedStanzas and become duplicated on reconnect. See SMACK-706.
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bindResourceAndEstablishSession(resource);
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if (isSmAvailable() && useSm) {
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// Remove what is maybe left from previously stream managed sessions
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serverHandledStanzasCount = 0;
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sendNonza(new Enable(useSmResumption, smClientMaxResumptionTime));
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// XEP-198 3. Enabling Stream Management. If the server response to 'Enable' is 'Failed'
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// then this is a non recoverable error and we therefore throw an exception.
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waitForConditionOrThrowConnectionException(() -> smEnabledSyncPoint, "enabling stream mangement");
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synchronized (requestAckPredicates) {
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if (requestAckPredicates.isEmpty()) {
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// Assure that we have at lest one predicate set up that so that we request acks
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// for the server and eventually flush some stanzas from the unacknowledged
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// stanza queue
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requestAckPredicates.add(Predicate.forMessagesOrAfter5Stanzas());
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}
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}
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}
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// Inform client about failed resumption if possible, resend stanzas otherwise
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// Process the stanzas synchronously so a client can re-queue them for transmission
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// before it is informed about connection success
|
|
if (!stanzaDroppedListeners.isEmpty()) {
|
|
for (Stanza stanza : previouslyUnackedStanzas) {
|
|
for (StanzaListener listener : stanzaDroppedListeners) {
|
|
try {
|
|
listener.processStanza(stanza);
|
|
}
|
|
catch (InterruptedException | NotConnectedException | NotLoggedInException e) {
|
|
LOGGER.log(Level.FINER, "StanzaDroppedListener received exception", e);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (Stanza stanza : previouslyUnackedStanzas) {
|
|
sendStanzaInternal(stanza);
|
|
}
|
|
}
|
|
|
|
afterSuccessfulLogin(false);
|
|
}
|
|
|
|
@Override
|
|
public boolean isSecureConnection() {
|
|
return secureSocket != null;
|
|
}
|
|
|
|
/**
|
|
* Shuts the current connection down. After this method returns, the connection must be ready
|
|
* for re-use by connect.
|
|
*/
|
|
@Override
|
|
protected void shutdown() {
|
|
if (isSmEnabled()) {
|
|
try {
|
|
// Try to send a last SM Acknowledgement. Most servers won't find this information helpful, as the SM
|
|
// state is dropped after a clean disconnect anyways. OTOH it doesn't hurt much either.
|
|
sendSmAcknowledgementInternal();
|
|
} catch (InterruptedException | NotConnectedException e) {
|
|
LOGGER.log(Level.FINE, "Can not send final SM ack as connection is not connected", e);
|
|
}
|
|
}
|
|
shutdown(false);
|
|
}
|
|
|
|
@Override
|
|
public synchronized void instantShutdown() {
|
|
shutdown(true);
|
|
}
|
|
|
|
private void shutdown(boolean instant) {
|
|
// The writer thread may already been finished at this point, for example when the connection is in the
|
|
// disconnected-but-resumable state. There is no need to wait for the closing stream tag from the server in this
|
|
// case.
|
|
if (!packetWriter.done()) {
|
|
// First shutdown the writer, this will result in a closing stream element getting send to
|
|
// the server
|
|
LOGGER.finer(packetWriter.threadName + " shutdown()");
|
|
packetWriter.shutdown(instant);
|
|
LOGGER.finer(packetWriter.threadName + " shutdown() returned");
|
|
|
|
if (!instant) {
|
|
waitForClosingStreamTagFromServer();
|
|
}
|
|
}
|
|
|
|
LOGGER.finer(packetReader.threadName + " shutdown()");
|
|
packetReader.shutdown();
|
|
LOGGER.finer(packetReader.threadName + " shutdown() returned");
|
|
|
|
CloseableUtil.maybeClose(socket, LOGGER);
|
|
|
|
setWasAuthenticated();
|
|
|
|
try {
|
|
boolean readerAndWriterThreadsTermianted = waitFor(() -> !packetWriter.running && !packetReader.running);
|
|
if (!readerAndWriterThreadsTermianted) {
|
|
LOGGER.severe("Reader and/or writer threads did not terminate timely. Writer running: "
|
|
+ packetWriter.running + ", Reader running: " + packetReader.running);
|
|
} else {
|
|
LOGGER.fine("Reader and writer threads terminated");
|
|
}
|
|
} catch (InterruptedException e) {
|
|
LOGGER.log(Level.FINE, "Interrupted while waiting for reader and writer threads to terminate", e);
|
|
}
|
|
|
|
if (disconnectedButResumeable) {
|
|
return;
|
|
}
|
|
|
|
// If we are able to resume the stream, then don't set
|
|
// connected/authenticated/usingTLS to false since we like to behave like we are still
|
|
// connected (e.g. sendStanza should not throw a NotConnectedException).
|
|
if (instant) {
|
|
disconnectedButResumeable = isSmResumptionPossible();
|
|
if (!disconnectedButResumeable) {
|
|
// Reset the stream management session id to null, since the stream is no longer resumable. Note that we
|
|
// keep the unacknowledgedStanzas queue, because we want to resend them when we are reconnected.
|
|
smSessionId = null;
|
|
}
|
|
} else {
|
|
disconnectedButResumeable = false;
|
|
|
|
// Drop the stream management state if this is not an instant shutdown. We send
|
|
// a </stream> close tag and now the stream management state is no longer valid.
|
|
// This also prevents that we will potentially (re-)send any unavailable presence we
|
|
// may have send, because it got put into the unacknowledged queue and was not acknowledged before the
|
|
// connection terminated.
|
|
dropSmState();
|
|
// Note that we deliberately do not reset authenticatedConnectionInitiallyEstablishedTimestamp here, so that the
|
|
// information is available in the connectionClosedOnError() listeners.
|
|
}
|
|
authenticated = false;
|
|
connected = false;
|
|
secureSocket = null;
|
|
reader = null;
|
|
writer = null;
|
|
|
|
initState();
|
|
}
|
|
|
|
@Override
|
|
public void sendNonza(Nonza element) throws NotConnectedException, InterruptedException {
|
|
packetWriter.sendStreamElement(element);
|
|
}
|
|
|
|
@Override
|
|
protected void sendStanzaInternal(Stanza packet) throws NotConnectedException, InterruptedException {
|
|
packetWriter.sendStreamElement(packet);
|
|
if (isSmEnabled()) {
|
|
for (StanzaFilter requestAckPredicate : requestAckPredicates) {
|
|
if (requestAckPredicate.accept(packet)) {
|
|
requestSmAcknowledgementInternal();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private void connectUsingConfiguration() throws ConnectionException, IOException, InterruptedException {
|
|
RemoteXmppTcpConnectionEndpoints.Result<Rfc6120TcpRemoteConnectionEndpoint> result = RemoteXmppTcpConnectionEndpoints.lookup(config);
|
|
|
|
List<RemoteConnectionException<Rfc6120TcpRemoteConnectionEndpoint>> connectionExceptions = new ArrayList<>();
|
|
|
|
SocketFactory socketFactory = config.getSocketFactory();
|
|
ProxyInfo proxyInfo = config.getProxyInfo();
|
|
int timeout = config.getConnectTimeout();
|
|
if (socketFactory == null) {
|
|
socketFactory = SocketFactory.getDefault();
|
|
}
|
|
for (Rfc6120TcpRemoteConnectionEndpoint endpoint : result.discoveredRemoteConnectionEndpoints) {
|
|
Iterator<? extends InetAddress> inetAddresses;
|
|
String host = endpoint.getHost().toString();
|
|
UInt16 portUint16 = endpoint.getPort();
|
|
int port = portUint16.intValue();
|
|
if (proxyInfo == null) {
|
|
inetAddresses = endpoint.getInetAddresses().iterator();
|
|
assert inetAddresses.hasNext();
|
|
|
|
innerloop: while (inetAddresses.hasNext()) {
|
|
// Create a *new* Socket before every connection attempt, i.e. connect() call, since Sockets are not
|
|
// re-usable after a failed connection attempt. See also SMACK-724.
|
|
SmackFuture.SocketFuture socketFuture = new SmackFuture.SocketFuture(socketFactory);
|
|
|
|
final InetAddress inetAddress = inetAddresses.next();
|
|
final InetSocketAddress inetSocketAddress = new InetSocketAddress(inetAddress, port);
|
|
LOGGER.finer("Trying to establish TCP connection to " + inetSocketAddress);
|
|
socketFuture.connectAsync(inetSocketAddress, timeout);
|
|
|
|
try {
|
|
socket = socketFuture.getOrThrow();
|
|
} catch (IOException e) {
|
|
RemoteConnectionException<Rfc6120TcpRemoteConnectionEndpoint> rce = new RemoteConnectionException<>(
|
|
endpoint, inetAddress, e);
|
|
connectionExceptions.add(rce);
|
|
if (inetAddresses.hasNext()) {
|
|
continue innerloop;
|
|
} else {
|
|
break innerloop;
|
|
}
|
|
}
|
|
LOGGER.finer("Established TCP connection to " + inetSocketAddress);
|
|
// We found a host to connect to, return here
|
|
this.host = host;
|
|
this.port = portUint16;
|
|
return;
|
|
}
|
|
} else {
|
|
// TODO: Move this into the inner-loop above. There appears no reason why we should not try a proxy
|
|
// connection to every inet address of each connection endpoint.
|
|
socket = socketFactory.createSocket();
|
|
StringUtils.requireNotNullNorEmpty(host, "Host of endpoint " + endpoint + " must not be null when using a Proxy");
|
|
final String hostAndPort = host + " at port " + port;
|
|
LOGGER.finer("Trying to establish TCP connection via Proxy to " + hostAndPort);
|
|
try {
|
|
proxyInfo.getProxySocketConnection().connect(socket, host, port, timeout);
|
|
} catch (IOException e) {
|
|
CloseableUtil.maybeClose(socket, LOGGER);
|
|
RemoteConnectionException<Rfc6120TcpRemoteConnectionEndpoint> rce = new RemoteConnectionException<>(endpoint, null, e);
|
|
connectionExceptions.add(rce);
|
|
continue;
|
|
}
|
|
LOGGER.finer("Established TCP connection to " + hostAndPort);
|
|
// We found a host to connect to, return here
|
|
this.host = host;
|
|
this.port = portUint16;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// There are no more host addresses to try
|
|
// throw an exception and report all tried
|
|
// HostAddresses in the exception
|
|
throw EndpointConnectionException.from(result.lookupFailures, connectionExceptions);
|
|
}
|
|
|
|
/**
|
|
* Initializes the connection by creating a stanza reader and writer and opening a
|
|
* XMPP stream to the server.
|
|
*
|
|
* @throws IOException if an I/O error occurred.
|
|
* @throws InterruptedException if the calling thread was interrupted.
|
|
*/
|
|
private void initConnection() throws IOException, InterruptedException {
|
|
compressionHandler = null;
|
|
|
|
// Set the reader and writer instance variables
|
|
initReaderAndWriter();
|
|
|
|
// Start the writer thread. This will open an XMPP stream to the server
|
|
packetWriter.init();
|
|
// Start the reader thread. The startup() method will block until we
|
|
// get an opening stream packet back from server
|
|
packetReader.init();
|
|
}
|
|
|
|
private void initReaderAndWriter() throws IOException {
|
|
InputStream is = socket.getInputStream();
|
|
OutputStream os = socket.getOutputStream();
|
|
if (compressionHandler != null) {
|
|
is = compressionHandler.getInputStream(is);
|
|
os = compressionHandler.getOutputStream(os);
|
|
}
|
|
// OutputStreamWriter is already buffered, no need to wrap it into a BufferedWriter
|
|
writer = new OutputStreamWriter(os, "UTF-8");
|
|
reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
|
|
|
|
// If debugging is enabled, we open a window and write out all network traffic.
|
|
initDebugger();
|
|
}
|
|
|
|
/**
|
|
* The server has indicated that TLS negotiation can start. We now need to secure the
|
|
* existing plain connection and perform a handshake. This method won't return until the
|
|
* connection has finished the handshake or an error occurred while securing the connection.
|
|
* @throws IOException if an I/O error occurred.
|
|
* @throws SecurityNotPossibleException if TLS is not possible.
|
|
* @throws CertificateException if there is an issue with the certificate.
|
|
*/
|
|
@SuppressWarnings("LiteralClassName")
|
|
private void proceedTLSReceived() throws IOException, SecurityNotPossibleException, CertificateException {
|
|
SmackTlsContext smackTlsContext = getSmackTlsContext();
|
|
|
|
Socket plain = socket;
|
|
int port = plain.getPort();
|
|
String xmppServiceDomainString = config.getXMPPServiceDomain().toString();
|
|
SSLSocketFactory sslSocketFactory = smackTlsContext.sslContext.getSocketFactory();
|
|
// Secure the plain connection
|
|
socket = sslSocketFactory.createSocket(plain, xmppServiceDomainString, port, true);
|
|
|
|
final SSLSocket sslSocket = (SSLSocket) socket;
|
|
// Immediately set the enabled SSL protocols and ciphers. See SMACK-712 why this is
|
|
// important (at least on certain platforms) and it seems to be a good idea anyways to
|
|
// prevent an accidental implicit handshake.
|
|
TLSUtils.setEnabledProtocolsAndCiphers(sslSocket, config.getEnabledSSLProtocols(), config.getEnabledSSLCiphers());
|
|
|
|
// Initialize the reader and writer with the new secured version
|
|
initReaderAndWriter();
|
|
|
|
// Proceed to do the handshake
|
|
sslSocket.startHandshake();
|
|
|
|
if (smackTlsContext.daneVerifier != null) {
|
|
smackTlsContext.daneVerifier.finish(sslSocket.getSession());
|
|
}
|
|
|
|
final HostnameVerifier verifier = getConfiguration().getHostnameVerifier();
|
|
if (verifier == null) {
|
|
throw new IllegalStateException("No HostnameVerifier set. Use connectionConfiguration.setHostnameVerifier() to configure.");
|
|
}
|
|
|
|
final String verifierHostname;
|
|
{
|
|
DnsName xmppServiceDomainDnsName = getConfiguration().getXmppServiceDomainAsDnsNameIfPossible();
|
|
// Try to convert the XMPP service domain, which potentially includes Unicode characters, into ASCII
|
|
// Compatible Encoding (ACE) to match RFC3280 dNSname IA5String constraint.
|
|
// See also: https://bugzilla.mozilla.org/show_bug.cgi?id=280839#c1
|
|
if (xmppServiceDomainDnsName != null) {
|
|
verifierHostname = xmppServiceDomainDnsName.ace;
|
|
}
|
|
else {
|
|
LOGGER.log(Level.WARNING, "XMPP service domain name '" + getXMPPServiceDomain()
|
|
+ "' can not be represented as DNS name. TLS X.509 certificate validiation may fail.");
|
|
verifierHostname = getXMPPServiceDomain().toString();
|
|
}
|
|
}
|
|
|
|
final boolean verificationSuccessful;
|
|
// Verify the TLS session.
|
|
verificationSuccessful = verifier.verify(verifierHostname, sslSocket.getSession());
|
|
if (!verificationSuccessful) {
|
|
throw new CertificateException(
|
|
"Hostname verification of certificate failed. Certificate does not authenticate "
|
|
+ getXMPPServiceDomain());
|
|
}
|
|
|
|
// Set that TLS was successful
|
|
secureSocket = sslSocket;
|
|
}
|
|
|
|
/**
|
|
* Returns the compression handler that can be used for one compression methods offered by the server.
|
|
*
|
|
* @return a instance of XMPPInputOutputStream or null if no suitable instance was found
|
|
*
|
|
*/
|
|
private static XMPPInputOutputStream maybeGetCompressionHandler(Compress.Feature compression) {
|
|
for (XMPPInputOutputStream handler : SmackConfiguration.getCompressionHandlers()) {
|
|
String method = handler.getCompressionMethod();
|
|
if (compression.getMethods().contains(method))
|
|
return handler;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public boolean isUsingCompression() {
|
|
return compressionHandler != null && compressSyncPoint;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Starts using stream compression that will compress network traffic. Traffic can be
|
|
* reduced up to 90%. Therefore, stream compression is ideal when using a slow speed network
|
|
* connection. However, the server and the client will need to use more CPU time in order to
|
|
* un/compress network data so under high load the server performance might be affected.
|
|
* </p>
|
|
* <p>
|
|
* Stream compression has to have been previously offered by the server. Currently only the
|
|
* zlib method is supported by the client. Stream compression negotiation has to be done
|
|
* before authentication took place.
|
|
* </p>
|
|
*
|
|
* @throws NotConnectedException if the XMPP connection is not connected.
|
|
* @throws SmackException if Smack detected an exceptional situation.
|
|
* @throws InterruptedException if the calling thread was interrupted.
|
|
* @throws XMPPException if an XMPP protocol error was received.
|
|
*/
|
|
private void maybeEnableCompression() throws SmackException, InterruptedException, XMPPException {
|
|
if (!config.isCompressionEnabled()) {
|
|
return;
|
|
}
|
|
|
|
Compress.Feature compression = getFeature(Compress.Feature.class);
|
|
if (compression == null) {
|
|
// Server does not support compression
|
|
return;
|
|
}
|
|
// If stream compression was offered by the server and we want to use
|
|
// compression then send compression request to the server
|
|
if ((compressionHandler = maybeGetCompressionHandler(compression)) != null) {
|
|
compressSyncPoint = false;
|
|
sendNonza(new Compress(compressionHandler.getCompressionMethod()));
|
|
waitForConditionOrThrowConnectionException(() -> compressSyncPoint, "establishing stream compression");
|
|
} else {
|
|
LOGGER.warning("Could not enable compression because no matching handler/method pair was found");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Establishes a connection to the XMPP server. It basically
|
|
* creates and maintains a socket connection to the server.
|
|
* <p>
|
|
* Listeners will be preserved from a previous connection if the reconnection
|
|
* occurs after an abrupt termination.
|
|
* </p>
|
|
*
|
|
* @throws XMPPException if an error occurs while trying to establish the connection.
|
|
* @throws SmackException if Smack detected an exceptional situation.
|
|
* @throws IOException if an I/O error occurred.
|
|
* @throws InterruptedException if the calling thread was interrupted.
|
|
*/
|
|
@Override
|
|
protected void connectInternal() throws SmackException, IOException, XMPPException, InterruptedException {
|
|
// Establishes the TCP connection to the server and does setup the reader and writer. Throws an exception if
|
|
// there is an error establishing the connection
|
|
connectUsingConfiguration();
|
|
|
|
connected = true;
|
|
|
|
// We connected successfully to the servers TCP port
|
|
initConnection();
|
|
|
|
// TLS handled will be true either if TLS was established, or if it was not mandatory.
|
|
waitForConditionOrThrowConnectionException(() -> tlsHandled, "establishing TLS");
|
|
|
|
// Wait with SASL auth until the SASL mechanisms have been received
|
|
waitForConditionOrThrowConnectionException(() -> saslFeatureReceived, "SASL mechanisms stream feature from server");
|
|
}
|
|
|
|
/**
|
|
* For unit testing purposes
|
|
*
|
|
* @param writer TODO javadoc me please
|
|
*/
|
|
protected void setWriter(Writer writer) {
|
|
this.writer = writer;
|
|
}
|
|
|
|
@Override
|
|
protected void afterFeaturesReceived() throws NotConnectedException, InterruptedException, SecurityRequiredByServerException {
|
|
StartTls startTlsFeature = getFeature(StartTls.class);
|
|
if (startTlsFeature != null) {
|
|
if (startTlsFeature.required() && config.getSecurityMode() == SecurityMode.disabled) {
|
|
SecurityRequiredByServerException smackException = new SecurityRequiredByServerException();
|
|
currentSmackException = smackException;
|
|
notifyWaitingThreads();
|
|
throw smackException;
|
|
}
|
|
|
|
if (config.getSecurityMode() != ConnectionConfiguration.SecurityMode.disabled) {
|
|
sendNonza(new StartTls());
|
|
} else {
|
|
tlsHandled = true;
|
|
notifyWaitingThreads();
|
|
}
|
|
} else {
|
|
tlsHandled = true;
|
|
notifyWaitingThreads();
|
|
}
|
|
|
|
if (isSaslAuthenticated()) {
|
|
// If we have received features after the SASL has been successfully completed, then we
|
|
// have also *maybe* received, as it is an optional feature, the compression feature
|
|
// from the server.
|
|
streamFeaturesAfterAuthenticationReceived = true;
|
|
notifyWaitingThreads();
|
|
}
|
|
}
|
|
|
|
private void resetParser() throws IOException {
|
|
try {
|
|
packetReader.parser = SmackXmlParser.newXmlParser(reader);
|
|
} catch (XmlPullParserException e) {
|
|
throw new IOException(e);
|
|
}
|
|
}
|
|
|
|
private void openStreamAndResetParser() throws IOException, NotConnectedException, InterruptedException {
|
|
sendStreamOpen();
|
|
resetParser();
|
|
}
|
|
|
|
protected class PacketReader {
|
|
|
|
private final String threadName = "Smack Reader (" + getConnectionCounter() + ')';
|
|
|
|
XmlPullParser parser;
|
|
|
|
private volatile boolean done;
|
|
|
|
private boolean running;
|
|
|
|
/**
|
|
* Initializes the reader in order to be used. The reader is initialized during the
|
|
* first connection and when reconnecting due to an abruptly disconnection.
|
|
*/
|
|
void init() {
|
|
done = false;
|
|
|
|
running = true;
|
|
Async.go(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
LOGGER.finer(threadName + " start");
|
|
try {
|
|
parsePackets();
|
|
} finally {
|
|
LOGGER.finer(threadName + " exit");
|
|
running = false;
|
|
notifyWaitingThreads();
|
|
}
|
|
}
|
|
}, threadName);
|
|
}
|
|
|
|
/**
|
|
* Shuts the stanza reader down. This method simply sets the 'done' flag to true.
|
|
*/
|
|
void shutdown() {
|
|
done = true;
|
|
}
|
|
|
|
/**
|
|
* Parse top-level packets in order to process them further.
|
|
*/
|
|
private void parsePackets() {
|
|
try {
|
|
openStreamAndResetParser();
|
|
XmlPullParser.Event eventType = parser.getEventType();
|
|
while (!done) {
|
|
switch (eventType) {
|
|
case START_ELEMENT:
|
|
final String name = parser.getName();
|
|
final String namespace = parser.getNamespace();
|
|
|
|
switch (name) {
|
|
case Message.ELEMENT:
|
|
case IQ.IQ_ELEMENT:
|
|
case Presence.ELEMENT:
|
|
try {
|
|
parseAndProcessStanza(parser);
|
|
} finally {
|
|
clientHandledStanzasCount = SMUtils.incrementHeight(clientHandledStanzasCount);
|
|
}
|
|
break;
|
|
case "stream":
|
|
if (StreamOpen.ETHERX_JABBER_STREAMS_NAMESPACE.equals(namespace)) {
|
|
onStreamOpen(parser);
|
|
}
|
|
break;
|
|
case "error":
|
|
StreamError streamError = PacketParserUtils.parseStreamError(parser);
|
|
// Stream errors are non recoverable, throw this exceptions. Also note that this will set
|
|
// this exception as current connection exceptions and notify any waiting threads.
|
|
throw new StreamErrorException(streamError);
|
|
case "features":
|
|
parseFeaturesAndNotify(parser);
|
|
break;
|
|
case "proceed":
|
|
// Secure the connection by negotiating TLS
|
|
proceedTLSReceived();
|
|
// Send a new opening stream to the server
|
|
openStreamAndResetParser();
|
|
break;
|
|
case "failure":
|
|
switch (namespace) {
|
|
case "urn:ietf:params:xml:ns:xmpp-tls":
|
|
// TLS negotiation has failed. The server will close the connection
|
|
// TODO Parse failure stanza
|
|
throw new SmackException.SmackMessageException("TLS negotiation has failed");
|
|
case "http://jabber.org/protocol/compress":
|
|
// Stream compression has been denied. This is a recoverable
|
|
// situation. It is still possible to authenticate and
|
|
// use the connection but using an uncompressed connection
|
|
// TODO Parse failure stanza
|
|
currentSmackException = new SmackException.SmackMessageException("Could not establish compression");
|
|
notifyWaitingThreads();
|
|
break;
|
|
default:
|
|
parseAndProcessNonza(parser);
|
|
}
|
|
break;
|
|
case Compressed.ELEMENT:
|
|
// Server confirmed that it's possible to use stream compression. Start
|
|
// stream compression
|
|
// Initialize the reader and writer with the new compressed version
|
|
initReaderAndWriter();
|
|
// Send a new opening stream to the server
|
|
openStreamAndResetParser();
|
|
// Notify that compression is being used
|
|
compressSyncPoint = true;
|
|
notifyWaitingThreads();
|
|
break;
|
|
case Enabled.ELEMENT:
|
|
Enabled enabled = ParseStreamManagement.enabled(parser);
|
|
if (enabled.isResumeSet()) {
|
|
smSessionId = enabled.getId();
|
|
if (StringUtils.isNullOrEmpty(smSessionId)) {
|
|
SmackException xmppException = new SmackException.SmackMessageException("Stream Management 'enabled' element with resume attribute but without session id received");
|
|
setCurrentConnectionExceptionAndNotify(xmppException);
|
|
throw xmppException;
|
|
}
|
|
smServerMaxResumptionTime = enabled.getMaxResumptionTime();
|
|
} else {
|
|
// Mark this a non-resumable stream by setting smSessionId to null
|
|
smSessionId = null;
|
|
}
|
|
clientHandledStanzasCount = 0;
|
|
smWasEnabledAtLeastOnce = true;
|
|
smEnabledSyncPoint = true;
|
|
notifyWaitingThreads();
|
|
break;
|
|
case Failed.ELEMENT:
|
|
Failed failed = ParseStreamManagement.failed(parser);
|
|
if (smResumedSyncPoint == SyncPointState.request_sent) {
|
|
// This is a <failed/> nonza in a response to resuming a previous stream, failure to do
|
|
// so is non-fatal as we can simply continue with resource binding in this case.
|
|
smResumptionFailed = failed;
|
|
notifyWaitingThreads();
|
|
} else {
|
|
FailedNonzaException xmppException = new FailedNonzaException(failed, failed.getStanzaErrorCondition());
|
|
setCurrentConnectionExceptionAndNotify(xmppException);
|
|
}
|
|
break;
|
|
case Resumed.ELEMENT:
|
|
Resumed resumed = ParseStreamManagement.resumed(parser);
|
|
if (!smSessionId.equals(resumed.getPrevId())) {
|
|
throw new StreamIdDoesNotMatchException(smSessionId, resumed.getPrevId());
|
|
}
|
|
// Mark SM as enabled
|
|
smEnabledSyncPoint = true;
|
|
// First, drop the stanzas already handled by the server
|
|
processHandledCount(resumed.getHandledCount());
|
|
// Then re-send what is left in the unacknowledged queue
|
|
List<Stanza> stanzasToResend = new ArrayList<>(unacknowledgedStanzas.size());
|
|
unacknowledgedStanzas.drainTo(stanzasToResend);
|
|
for (Stanza stanza : stanzasToResend) {
|
|
sendStanzaInternal(stanza);
|
|
}
|
|
// If there where stanzas resent, then request a SM ack for them.
|
|
// Writer's sendStreamElement() won't do it automatically based on
|
|
// predicates.
|
|
if (!stanzasToResend.isEmpty()) {
|
|
requestSmAcknowledgementInternal();
|
|
}
|
|
// Mark SM resumption as successful
|
|
smResumedSyncPoint = SyncPointState.successful;
|
|
notifyWaitingThreads();
|
|
break;
|
|
case AckAnswer.ELEMENT:
|
|
AckAnswer ackAnswer = ParseStreamManagement.ackAnswer(parser);
|
|
processHandledCount(ackAnswer.getHandledCount());
|
|
break;
|
|
case AckRequest.ELEMENT:
|
|
ParseStreamManagement.ackRequest(parser);
|
|
if (smEnabledSyncPoint) {
|
|
sendSmAcknowledgementInternal();
|
|
} else {
|
|
LOGGER.warning("SM Ack Request received while SM is not enabled");
|
|
}
|
|
break;
|
|
default:
|
|
parseAndProcessNonza(parser);
|
|
break;
|
|
}
|
|
break;
|
|
case END_ELEMENT:
|
|
final String endTagName = parser.getName();
|
|
if ("stream".equals(endTagName)) {
|
|
if (!parser.getNamespace().equals("http://etherx.jabber.org/streams")) {
|
|
LOGGER.warning(XMPPTCPConnection.this + " </stream> but different namespace " + parser.getNamespace());
|
|
break;
|
|
}
|
|
|
|
// Check if the queue was already shut down before reporting success on closing stream tag
|
|
// received. This avoids a race if there is a disconnect(), followed by a connect(), which
|
|
// did re-start the queue again, causing this writer to assume that the queue is not
|
|
// shutdown, which results in a call to disconnect().
|
|
final boolean queueWasShutdown = packetWriter.queue.isShutdown();
|
|
closingStreamReceived = true;
|
|
notifyWaitingThreads();
|
|
|
|
if (queueWasShutdown) {
|
|
// We received a closing stream element *after* we initiated the
|
|
// termination of the session by sending a closing stream element to
|
|
// the server first
|
|
return;
|
|
} else {
|
|
// We received a closing stream element from the server without us
|
|
// sending a closing stream element first. This means that the
|
|
// server wants to terminate the session, therefore disconnect
|
|
// the connection
|
|
LOGGER.info(XMPPTCPConnection.this
|
|
+ " received closing </stream> element."
|
|
+ " Server wants to terminate the connection, calling disconnect()");
|
|
ASYNC_BUT_ORDERED.performAsyncButOrdered(XMPPTCPConnection.this, new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
disconnect();
|
|
}});
|
|
}
|
|
}
|
|
break;
|
|
case END_DOCUMENT:
|
|
// END_DOCUMENT only happens in an error case, as otherwise we would see a
|
|
// closing stream element before.
|
|
throw new SmackException.SmackMessageException(
|
|
"Parser got END_DOCUMENT event. This could happen e.g. if the server closed the connection without sending a closing stream element");
|
|
default:
|
|
// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
|
|
break;
|
|
}
|
|
eventType = parser.next();
|
|
}
|
|
}
|
|
catch (Exception e) {
|
|
// Set running to false since this thread will exit here and notifyConnectionError() will wait until
|
|
// the reader and writer thread's 'running' value is false. Hence we need to set it to false before calling
|
|
// notifyConnetctionError() below, even though run() also sets it to false. Therefore, do not remove this.
|
|
running = false;
|
|
|
|
String ignoreReasonThread = null;
|
|
|
|
boolean writerThreadWasShutDown = packetWriter.queue.isShutdown();
|
|
if (writerThreadWasShutDown) {
|
|
ignoreReasonThread = "writer";
|
|
} else if (done) {
|
|
ignoreReasonThread = "reader";
|
|
}
|
|
|
|
if (ignoreReasonThread != null) {
|
|
LOGGER.log(Level.FINER, "Ignoring " + e + " as " + ignoreReasonThread + " was already shut down");
|
|
return;
|
|
}
|
|
|
|
// Close the connection and notify connection listeners of the error.
|
|
notifyConnectionError(e);
|
|
}
|
|
}
|
|
}
|
|
|
|
protected class PacketWriter {
|
|
public static final int QUEUE_SIZE = XMPPTCPConnection.QUEUE_SIZE;
|
|
public static final int UNACKKNOWLEDGED_STANZAS_QUEUE_SIZE = 1024;
|
|
public static final int UNACKKNOWLEDGED_STANZAS_QUEUE_SIZE_HIGH_WATER_MARK = (int) (0.3 * UNACKKNOWLEDGED_STANZAS_QUEUE_SIZE);
|
|
|
|
private final String threadName = "Smack Writer (" + getConnectionCounter() + ')';
|
|
|
|
private final ArrayBlockingQueueWithShutdown<Element> queue = new ArrayBlockingQueueWithShutdown<>(
|
|
QUEUE_SIZE, true);
|
|
|
|
/**
|
|
* If set, the stanza writer is shut down
|
|
*/
|
|
protected volatile Long shutdownTimestamp = null;
|
|
|
|
private volatile boolean instantShutdown;
|
|
|
|
/**
|
|
* True if some preconditions are given to start the bundle and defer mechanism.
|
|
* <p>
|
|
* This will likely get set to true right after the start of the writer thread, because
|
|
* {@link #nextStreamElement()} will check if {@link queue} is empty, which is probably the case, and then set
|
|
* this field to true.
|
|
* </p>
|
|
*/
|
|
private boolean shouldBundleAndDefer;
|
|
|
|
private boolean running;
|
|
|
|
/**
|
|
* Initializes the writer in order to be used. It is called at the first connection and also
|
|
* is invoked if the connection is disconnected by an error.
|
|
*/
|
|
void init() {
|
|
shutdownTimestamp = null;
|
|
|
|
if (unacknowledgedStanzas != null) {
|
|
// It's possible that there are new stanzas in the writer queue that
|
|
// came in while we were disconnected but resumable, drain those into
|
|
// the unacknowledged queue so that they get resent now
|
|
drainWriterQueueToUnacknowledgedStanzas();
|
|
}
|
|
|
|
queue.start();
|
|
running = true;
|
|
Async.go(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
LOGGER.finer(threadName + " start");
|
|
try {
|
|
writePackets();
|
|
} finally {
|
|
LOGGER.finer(threadName + " exit");
|
|
running = false;
|
|
notifyWaitingThreads();
|
|
}
|
|
}
|
|
}, threadName);
|
|
}
|
|
|
|
private boolean done() {
|
|
return shutdownTimestamp != null;
|
|
}
|
|
|
|
protected void throwNotConnectedExceptionIfDoneAndResumptionNotPossible() throws NotConnectedException {
|
|
final boolean done = done();
|
|
if (done) {
|
|
final boolean smResumptionPossible = isSmResumptionPossible();
|
|
// Don't throw a NotConnectedException is there is an resumable stream available
|
|
if (!smResumptionPossible) {
|
|
throw new NotConnectedException(XMPPTCPConnection.this, "done=" + done
|
|
+ " smResumptionPossible=" + smResumptionPossible);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sends the specified element to the server.
|
|
*
|
|
* @param element the element to send.
|
|
* @throws NotConnectedException if the XMPP connection is not connected.
|
|
* @throws InterruptedException if the calling thread was interrupted.
|
|
*/
|
|
protected void sendStreamElement(Element element) throws NotConnectedException, InterruptedException {
|
|
throwNotConnectedExceptionIfDoneAndResumptionNotPossible();
|
|
try {
|
|
queue.put(element);
|
|
}
|
|
catch (InterruptedException e) {
|
|
// put() may throw an InterruptedException for two reasons:
|
|
// 1. If the queue was shut down
|
|
// 2. If the thread was interrupted
|
|
// so we have to check which is the case
|
|
throwNotConnectedExceptionIfDoneAndResumptionNotPossible();
|
|
// If the method above did not throw, then the sending thread was interrupted
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Shuts down the stanza writer. Once this method has been called, no further
|
|
* packets will be written to the server.
|
|
*/
|
|
void shutdown(boolean instant) {
|
|
instantShutdown = instant;
|
|
queue.shutdown();
|
|
shutdownTimestamp = System.currentTimeMillis();
|
|
}
|
|
|
|
/**
|
|
* Maybe return the next available element from the queue for writing. If the queue is shut down <b>or</b> a
|
|
* spurious interrupt occurs, <code>null</code> is returned. So it is important to check the 'done' condition in
|
|
* that case.
|
|
*
|
|
* @return the next element for writing or null.
|
|
*/
|
|
private Element nextStreamElement() {
|
|
// It is important the we check if the queue is empty before removing an element from it
|
|
if (queue.isEmpty()) {
|
|
shouldBundleAndDefer = true;
|
|
}
|
|
Element packet = null;
|
|
try {
|
|
packet = queue.take();
|
|
}
|
|
catch (InterruptedException e) {
|
|
if (!queue.isShutdown()) {
|
|
// Users shouldn't try to interrupt the packet writer thread
|
|
LOGGER.log(Level.WARNING, "Writer thread was interrupted. Don't do that. Use disconnect() instead.", e);
|
|
}
|
|
}
|
|
return packet;
|
|
}
|
|
|
|
private void writePackets() {
|
|
try {
|
|
// Write out packets from the queue.
|
|
while (!done()) {
|
|
Element element = nextStreamElement();
|
|
if (element == null) {
|
|
continue;
|
|
}
|
|
|
|
// Get a local version of the bundle and defer callback, in case it's unset
|
|
// between the null check and the method invocation
|
|
final BundleAndDeferCallback localBundleAndDeferCallback = bundleAndDeferCallback;
|
|
// If the preconditions are given (e.g. bundleAndDefer callback is set, queue is
|
|
// empty), then we could wait a bit for further stanzas attempting to decrease
|
|
// our energy consumption
|
|
if (localBundleAndDeferCallback != null && isAuthenticated() && shouldBundleAndDefer) {
|
|
// Reset shouldBundleAndDefer to false, nextStreamElement() will set it to true once the
|
|
// queue is empty again.
|
|
shouldBundleAndDefer = false;
|
|
final AtomicBoolean bundlingAndDeferringStopped = new AtomicBoolean();
|
|
final int bundleAndDeferMillis = localBundleAndDeferCallback.getBundleAndDeferMillis(new BundleAndDefer(
|
|
bundlingAndDeferringStopped));
|
|
if (bundleAndDeferMillis > 0) {
|
|
long remainingWait = bundleAndDeferMillis;
|
|
final long waitStart = System.currentTimeMillis();
|
|
synchronized (bundlingAndDeferringStopped) {
|
|
while (!bundlingAndDeferringStopped.get() && remainingWait > 0) {
|
|
bundlingAndDeferringStopped.wait(remainingWait);
|
|
remainingWait = bundleAndDeferMillis
|
|
- (System.currentTimeMillis() - waitStart);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
Stanza packet = null;
|
|
if (element instanceof Stanza) {
|
|
packet = (Stanza) element;
|
|
}
|
|
else if (element instanceof Enable) {
|
|
// The client needs to add messages to the unacknowledged stanzas queue
|
|
// right after it sent 'enabled'. Stanza will be added once
|
|
// unacknowledgedStanzas is not null.
|
|
unacknowledgedStanzas = new ArrayBlockingQueue<>(UNACKKNOWLEDGED_STANZAS_QUEUE_SIZE);
|
|
}
|
|
maybeAddToUnacknowledgedStanzas(packet);
|
|
|
|
CharSequence elementXml = element.toXML(outgoingStreamXmlEnvironment);
|
|
if (elementXml instanceof XmlStringBuilder) {
|
|
try {
|
|
((XmlStringBuilder) elementXml).write(writer, outgoingStreamXmlEnvironment);
|
|
} catch (NullPointerException npe) {
|
|
LOGGER.log(Level.FINE, "NPE in XmlStringBuilder of " + element.getClass() + ": " + element, npe);
|
|
throw npe;
|
|
}
|
|
}
|
|
else {
|
|
writer.write(elementXml.toString());
|
|
}
|
|
|
|
if (queue.isEmpty()) {
|
|
writer.flush();
|
|
}
|
|
if (packet != null) {
|
|
firePacketSendingListeners(packet);
|
|
}
|
|
}
|
|
if (!instantShutdown) {
|
|
// Flush out the rest of the queue.
|
|
try {
|
|
while (!queue.isEmpty()) {
|
|
Element packet = queue.remove();
|
|
if (packet instanceof Stanza) {
|
|
Stanza stanza = (Stanza) packet;
|
|
maybeAddToUnacknowledgedStanzas(stanza);
|
|
}
|
|
writer.write(packet.toXML().toString());
|
|
}
|
|
}
|
|
catch (Exception e) {
|
|
LOGGER.log(Level.WARNING,
|
|
"Exception flushing queue during shutdown, ignore and continue",
|
|
e);
|
|
}
|
|
|
|
// Close the stream.
|
|
try {
|
|
writer.write("</stream:stream>");
|
|
writer.flush();
|
|
}
|
|
catch (Exception e) {
|
|
LOGGER.log(Level.WARNING, "Exception writing closing stream element", e);
|
|
}
|
|
|
|
// Delete the queue contents (hopefully nothing is left).
|
|
queue.clear();
|
|
} else if (instantShutdown && isSmEnabled()) {
|
|
// This was an instantShutdown and SM is enabled, drain all remaining stanzas
|
|
// into the unacknowledgedStanzas queue
|
|
drainWriterQueueToUnacknowledgedStanzas();
|
|
}
|
|
// Do *not* close the writer here, as it will cause the socket
|
|
// to get closed. But we may want to receive further stanzas
|
|
// until the closing stream tag is received. The socket will be
|
|
// closed in shutdown().
|
|
}
|
|
catch (Exception e) {
|
|
// The exception can be ignored if the the connection is 'done'
|
|
// or if the it was caused because the socket got closed
|
|
if (!(done() || queue.isShutdown())) {
|
|
// Set running to false since this thread will exit here and notifyConnectionError() will wait until
|
|
// the reader and writer thread's 'running' value is false.
|
|
running = false;
|
|
notifyConnectionError(e);
|
|
} else {
|
|
LOGGER.log(Level.FINE, "Ignoring Exception in writePackets()", e);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void drainWriterQueueToUnacknowledgedStanzas() {
|
|
List<Element> elements = new ArrayList<>(queue.size());
|
|
queue.drainTo(elements);
|
|
for (int i = 0; i < elements.size(); i++) {
|
|
Element element = elements.get(i);
|
|
// If the unacknowledgedStanza queue is full, then bail out with a warning message. See SMACK-844.
|
|
if (unacknowledgedStanzas.remainingCapacity() == 0) {
|
|
StreamManagementException.UnacknowledgedQueueFullException exception = StreamManagementException.UnacknowledgedQueueFullException
|
|
.newWith(i, elements, unacknowledgedStanzas);
|
|
LOGGER.log(Level.WARNING,
|
|
"Some stanzas may be lost as not all could be drained to the unacknowledged stanzas queue", exception);
|
|
return;
|
|
}
|
|
if (element instanceof Stanza) {
|
|
unacknowledgedStanzas.add((Stanza) element);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void maybeAddToUnacknowledgedStanzas(Stanza stanza) throws IOException {
|
|
// Check if the stream element should be put to the unacknowledgedStanza
|
|
// queue. Note that we can not do the put() in sendStanzaInternal() and the
|
|
// packet order is not stable at this point (sendStanzaInternal() can be
|
|
// called concurrently).
|
|
if (unacknowledgedStanzas != null && stanza != null) {
|
|
// If the unacknowledgedStanza queue reaching its high water mark, request an new ack
|
|
// from the server in order to drain it
|
|
if (unacknowledgedStanzas.size() == UNACKKNOWLEDGED_STANZAS_QUEUE_SIZE_HIGH_WATER_MARK) {
|
|
writer.write(AckRequest.INSTANCE.toXML().toString());
|
|
}
|
|
|
|
try {
|
|
// It is important the we put the stanza in the unacknowledged stanza
|
|
// queue before we put it on the wire
|
|
unacknowledgedStanzas.put(stanza);
|
|
}
|
|
catch (InterruptedException e) {
|
|
throw new IllegalStateException(e);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set if Stream Management should be used by default for new connections.
|
|
*
|
|
* @param useSmDefault true to use Stream Management for new connections.
|
|
*/
|
|
public static void setUseStreamManagementDefault(boolean useSmDefault) {
|
|
XMPPTCPConnection.useSmDefault = useSmDefault;
|
|
}
|
|
|
|
/**
|
|
* Set if Stream Management resumption should be used by default for new connections.
|
|
*
|
|
* @param useSmResumptionDefault true to use Stream Management resumption for new connections.
|
|
* @deprecated use {@link #setUseStreamManagementResumptionDefault(boolean)} instead.
|
|
*/
|
|
@Deprecated
|
|
public static void setUseStreamManagementResumptiodDefault(boolean useSmResumptionDefault) {
|
|
setUseStreamManagementResumptionDefault(useSmResumptionDefault);
|
|
}
|
|
|
|
/**
|
|
* Set if Stream Management resumption should be used by default for new connections.
|
|
*
|
|
* @param useSmResumptionDefault true to use Stream Management resumption for new connections.
|
|
*/
|
|
public static void setUseStreamManagementResumptionDefault(boolean useSmResumptionDefault) {
|
|
if (useSmResumptionDefault) {
|
|
// Also enable SM is resumption is enabled
|
|
setUseStreamManagementDefault(useSmResumptionDefault);
|
|
}
|
|
XMPPTCPConnection.useSmResumptionDefault = useSmResumptionDefault;
|
|
}
|
|
|
|
/**
|
|
* Set if Stream Management should be used if supported by the server.
|
|
*
|
|
* @param useSm true to use Stream Management.
|
|
*/
|
|
public void setUseStreamManagement(boolean useSm) {
|
|
this.useSm = useSm;
|
|
}
|
|
|
|
/**
|
|
* Set if Stream Management resumption should be used if supported by the server.
|
|
*
|
|
* @param useSmResumption true to use Stream Management resumption.
|
|
*/
|
|
public void setUseStreamManagementResumption(boolean useSmResumption) {
|
|
if (useSmResumption) {
|
|
// Also enable SM is resumption is enabled
|
|
setUseStreamManagement(useSmResumption);
|
|
}
|
|
this.useSmResumption = useSmResumption;
|
|
}
|
|
|
|
/**
|
|
* Set the preferred resumption time in seconds.
|
|
* @param resumptionTime the preferred resumption time in seconds
|
|
*/
|
|
public void setPreferredResumptionTime(int resumptionTime) {
|
|
smClientMaxResumptionTime = resumptionTime;
|
|
}
|
|
|
|
/**
|
|
* Add a predicate for Stream Management acknowledgment requests.
|
|
* <p>
|
|
* Those predicates are used to determine when a Stream Management acknowledgement request is send to the server.
|
|
* Some pre-defined predicates are found in the <code>org.jivesoftware.smack.sm.predicates</code> package.
|
|
* </p>
|
|
* <p>
|
|
* If not predicate is configured, the {@link Predicate#forMessagesOrAfter5Stanzas()} will be used.
|
|
* </p>
|
|
*
|
|
* @param predicate the predicate to add.
|
|
* @return if the predicate was not already active.
|
|
*/
|
|
public boolean addRequestAckPredicate(StanzaFilter predicate) {
|
|
synchronized (requestAckPredicates) {
|
|
return requestAckPredicates.add(predicate);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove the given predicate for Stream Management acknowledgment request.
|
|
* @param predicate the predicate to remove.
|
|
* @return true if the predicate was removed.
|
|
*/
|
|
public boolean removeRequestAckPredicate(StanzaFilter predicate) {
|
|
synchronized (requestAckPredicates) {
|
|
return requestAckPredicates.remove(predicate);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove all predicates for Stream Management acknowledgment requests.
|
|
*/
|
|
public void removeAllRequestAckPredicates() {
|
|
synchronized (requestAckPredicates) {
|
|
requestAckPredicates.clear();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Send an unconditional Stream Management acknowledgement request to the server.
|
|
*
|
|
* @throws StreamManagementNotEnabledException if Stream Management is not enabled.
|
|
* @throws NotConnectedException if the connection is not connected.
|
|
* @throws InterruptedException if the calling thread was interrupted.
|
|
*/
|
|
public void requestSmAcknowledgement() throws StreamManagementNotEnabledException, NotConnectedException, InterruptedException {
|
|
if (!isSmEnabled()) {
|
|
throw new StreamManagementException.StreamManagementNotEnabledException();
|
|
}
|
|
requestSmAcknowledgementInternal();
|
|
}
|
|
|
|
private void requestSmAcknowledgementInternal() throws NotConnectedException, InterruptedException {
|
|
packetWriter.sendStreamElement(AckRequest.INSTANCE);
|
|
}
|
|
|
|
/**
|
|
* Send a unconditional Stream Management acknowledgment to the server.
|
|
* <p>
|
|
* See <a href="http://xmpp.org/extensions/xep-0198.html#acking">XEP-198: Stream Management § 4. Acks</a>:
|
|
* "Either party MAY send an <a/> element at any time (e.g., after it has received a certain number of stanzas,
|
|
* or after a certain period of time), even if it has not received an <r/> element from the other party."
|
|
* </p>
|
|
*
|
|
* @throws StreamManagementNotEnabledException if Stream Management is not enabled.
|
|
* @throws NotConnectedException if the connection is not connected.
|
|
* @throws InterruptedException if the calling thread was interrupted.
|
|
*/
|
|
public void sendSmAcknowledgement() throws StreamManagementNotEnabledException, NotConnectedException, InterruptedException {
|
|
if (!isSmEnabled()) {
|
|
throw new StreamManagementException.StreamManagementNotEnabledException();
|
|
}
|
|
sendSmAcknowledgementInternal();
|
|
}
|
|
|
|
private void sendSmAcknowledgementInternal() throws NotConnectedException, InterruptedException {
|
|
AckAnswer ackAnswer = new AckAnswer(clientHandledStanzasCount);
|
|
// Do net put an ack to the queue if it has already been shutdown. Some servers, like ejabberd, like to request
|
|
// an ack even after we have send a stream close (and hance the queue was shutdown). If we would not check here,
|
|
// then the ack would dangle around in the queue, and be send on the next re-connection attempt even before the
|
|
// stream open.
|
|
packetWriter.queue.putIfNotShutdown(ackAnswer);
|
|
}
|
|
|
|
/**
|
|
* Add a Stanza acknowledged listener.
|
|
* <p>
|
|
* Those listeners will be invoked every time a Stanza has been acknowledged by the server. The will not get
|
|
* automatically removed. Consider using {@link #addStanzaIdAcknowledgedListener(String, StanzaListener)} when
|
|
* possible.
|
|
* </p>
|
|
*
|
|
* @param listener the listener to add.
|
|
*/
|
|
public void addStanzaAcknowledgedListener(StanzaListener listener) {
|
|
stanzaAcknowledgedListeners.add(listener);
|
|
}
|
|
|
|
/**
|
|
* Remove the given Stanza acknowledged listener.
|
|
*
|
|
* @param listener the listener.
|
|
* @return true if the listener was removed.
|
|
*/
|
|
public boolean removeStanzaAcknowledgedListener(StanzaListener listener) {
|
|
return stanzaAcknowledgedListeners.remove(listener);
|
|
}
|
|
|
|
/**
|
|
* Remove all stanza acknowledged listeners.
|
|
*/
|
|
public void removeAllStanzaAcknowledgedListeners() {
|
|
stanzaAcknowledgedListeners.clear();
|
|
}
|
|
|
|
/**
|
|
* Add a Stanza dropped listener.
|
|
* <p>
|
|
* Those listeners will be invoked every time a Stanza has been dropped due to a failed SM resume. They will not get
|
|
* automatically removed. If at least one StanzaDroppedListener is configured, no attempt will be made to retransmit
|
|
* the Stanzas.
|
|
* </p>
|
|
*
|
|
* @param listener the listener to add.
|
|
* @since 4.3.3
|
|
*/
|
|
public void addStanzaDroppedListener(StanzaListener listener) {
|
|
stanzaDroppedListeners.add(listener);
|
|
}
|
|
|
|
/**
|
|
* Remove the given Stanza dropped listener.
|
|
*
|
|
* @param listener the listener.
|
|
* @return true if the listener was removed.
|
|
* @since 4.3.3
|
|
*/
|
|
public boolean removeStanzaDroppedListener(StanzaListener listener) {
|
|
return stanzaDroppedListeners.remove(listener);
|
|
}
|
|
|
|
/**
|
|
* Add a new Stanza ID acknowledged listener for the given ID.
|
|
* <p>
|
|
* The listener will be invoked if the stanza with the given ID was acknowledged by the server. It will
|
|
* automatically be removed after the listener was run.
|
|
* </p>
|
|
*
|
|
* @param id the stanza ID.
|
|
* @param listener the listener to invoke.
|
|
* @return the previous listener for this stanza ID or null.
|
|
* @throws StreamManagementNotEnabledException if Stream Management is not enabled.
|
|
*/
|
|
@SuppressWarnings("FutureReturnValueIgnored")
|
|
public StanzaListener addStanzaIdAcknowledgedListener(final String id, StanzaListener listener) throws StreamManagementNotEnabledException {
|
|
// Prevent users from adding callbacks that will never get removed
|
|
if (!smWasEnabledAtLeastOnce) {
|
|
throw new StreamManagementException.StreamManagementNotEnabledException();
|
|
}
|
|
// Remove the listener after max. 3 hours
|
|
final int removeAfterSeconds = Math.min(getMaxSmResumptionTime(), 3 * 60 * 60);
|
|
schedule(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
stanzaIdAcknowledgedListeners.remove(id);
|
|
}
|
|
}, removeAfterSeconds, TimeUnit.SECONDS);
|
|
return stanzaIdAcknowledgedListeners.put(id, listener);
|
|
}
|
|
|
|
/**
|
|
* Remove the Stanza ID acknowledged listener for the given ID.
|
|
*
|
|
* @param id the stanza ID.
|
|
* @return true if the listener was found and removed, false otherwise.
|
|
*/
|
|
public StanzaListener removeStanzaIdAcknowledgedListener(String id) {
|
|
return stanzaIdAcknowledgedListeners.remove(id);
|
|
}
|
|
|
|
/**
|
|
* Removes all Stanza ID acknowledged listeners.
|
|
*/
|
|
public void removeAllStanzaIdAcknowledgedListeners() {
|
|
stanzaIdAcknowledgedListeners.clear();
|
|
}
|
|
|
|
/**
|
|
* Returns true if Stream Management is supported by the server.
|
|
*
|
|
* @return true if Stream Management is supported by the server.
|
|
*/
|
|
public boolean isSmAvailable() {
|
|
return hasFeature(StreamManagementFeature.ELEMENT, StreamManagement.NAMESPACE);
|
|
}
|
|
|
|
/**
|
|
* Returns true if Stream Management was successfully negotiated with the server.
|
|
*
|
|
* @return true if Stream Management was negotiated.
|
|
*/
|
|
public boolean isSmEnabled() {
|
|
return smEnabledSyncPoint;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the stream was successfully resumed with help of Stream Management.
|
|
*
|
|
* @return true if the stream was resumed.
|
|
*/
|
|
public boolean streamWasResumed() {
|
|
return smResumedSyncPoint == SyncPointState.successful;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the connection is disconnected by a Stream resumption via Stream Management is possible.
|
|
*
|
|
* @return true if disconnected but resumption possible.
|
|
*/
|
|
public boolean isDisconnectedButSmResumptionPossible() {
|
|
return disconnectedButResumeable && isSmResumptionPossible();
|
|
}
|
|
|
|
/**
|
|
* Returns true if the stream is resumable.
|
|
*
|
|
* @return true if the stream is resumable.
|
|
*/
|
|
public boolean isSmResumptionPossible() {
|
|
// There is no resumable stream available
|
|
if (smSessionId == null)
|
|
return false;
|
|
|
|
final Long shutdownTimestamp = packetWriter.shutdownTimestamp;
|
|
// Seems like we are already reconnected, report true
|
|
if (shutdownTimestamp == null) {
|
|
return true;
|
|
}
|
|
|
|
// See if resumption time is over
|
|
long current = System.currentTimeMillis();
|
|
long maxResumptionMillies = ((long) getMaxSmResumptionTime()) * 1000;
|
|
if (current > shutdownTimestamp + maxResumptionMillies) {
|
|
// Stream resumption is *not* possible if the current timestamp is greater then the greatest timestamp where
|
|
// resumption is possible
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Drop the stream management state. Sets {@link #smSessionId} and
|
|
* {@link #unacknowledgedStanzas} to <code>null</code>.
|
|
*/
|
|
private void dropSmState() {
|
|
// clientHandledCount and serverHandledCount will be reset on <enable/> and <enabled/>
|
|
// respective. No need to reset them here.
|
|
smSessionId = null;
|
|
unacknowledgedStanzas = null;
|
|
}
|
|
|
|
/**
|
|
* Get the maximum resumption time in seconds after which a managed stream can be resumed.
|
|
* <p>
|
|
* This method will return {@link Integer#MAX_VALUE} if neither the client nor the server specify a maximum
|
|
* resumption time. Be aware of integer overflows when using this value, e.g. do not add arbitrary values to it
|
|
* without checking for overflows before.
|
|
* </p>
|
|
*
|
|
* @return the maximum resumption time in seconds or {@link Integer#MAX_VALUE} if none set.
|
|
*/
|
|
public int getMaxSmResumptionTime() {
|
|
int clientResumptionTime = smClientMaxResumptionTime > 0 ? smClientMaxResumptionTime : Integer.MAX_VALUE;
|
|
int serverResumptionTime = smServerMaxResumptionTime > 0 ? smServerMaxResumptionTime : Integer.MAX_VALUE;
|
|
return Math.min(clientResumptionTime, serverResumptionTime);
|
|
}
|
|
|
|
private void processHandledCount(long handledCount) throws StreamManagementCounterError {
|
|
long ackedStanzasCount = SMUtils.calculateDelta(handledCount, serverHandledStanzasCount);
|
|
final List<Stanza> ackedStanzas = new ArrayList<>(
|
|
ackedStanzasCount <= Integer.MAX_VALUE ? (int) ackedStanzasCount
|
|
: Integer.MAX_VALUE);
|
|
for (long i = 0; i < ackedStanzasCount; i++) {
|
|
Stanza ackedStanza = unacknowledgedStanzas.poll();
|
|
// If the server ack'ed a stanza, then it must be in the
|
|
// unacknowledged stanza queue. There can be no exception.
|
|
if (ackedStanza == null) {
|
|
throw new StreamManagementCounterError(handledCount, serverHandledStanzasCount,
|
|
ackedStanzasCount, ackedStanzas);
|
|
}
|
|
ackedStanzas.add(ackedStanza);
|
|
}
|
|
|
|
boolean atLeastOneStanzaAcknowledgedListener = false;
|
|
if (!stanzaAcknowledgedListeners.isEmpty()) {
|
|
// If stanzaAcknowledgedListeners is not empty, the we have at least one
|
|
atLeastOneStanzaAcknowledgedListener = true;
|
|
}
|
|
else {
|
|
// Otherwise we look for a matching id in the stanza *id* acknowledged listeners
|
|
for (Stanza ackedStanza : ackedStanzas) {
|
|
String id = ackedStanza.getStanzaId();
|
|
if (id != null && stanzaIdAcknowledgedListeners.containsKey(id)) {
|
|
atLeastOneStanzaAcknowledgedListener = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Only spawn a new thread if there is a chance that some listener is invoked
|
|
if (atLeastOneStanzaAcknowledgedListener) {
|
|
asyncGo(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
for (Stanza ackedStanza : ackedStanzas) {
|
|
for (StanzaListener listener : stanzaAcknowledgedListeners) {
|
|
try {
|
|
listener.processStanza(ackedStanza);
|
|
}
|
|
catch (InterruptedException | NotConnectedException | NotLoggedInException e) {
|
|
LOGGER.log(Level.FINER, "Received exception", e);
|
|
}
|
|
}
|
|
String id = ackedStanza.getStanzaId();
|
|
if (StringUtils.isNullOrEmpty(id)) {
|
|
continue;
|
|
}
|
|
StanzaListener listener = stanzaIdAcknowledgedListeners.remove(id);
|
|
if (listener != null) {
|
|
try {
|
|
listener.processStanza(ackedStanza);
|
|
}
|
|
catch (InterruptedException | NotConnectedException | NotLoggedInException e) {
|
|
LOGGER.log(Level.FINER, "Received exception", e);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
serverHandledStanzasCount = handledCount;
|
|
}
|
|
|
|
/**
|
|
* Set the default bundle and defer callback used for new connections.
|
|
*
|
|
* @param defaultBundleAndDeferCallback TODO javadoc me please
|
|
* @see BundleAndDeferCallback
|
|
* @since 4.1
|
|
*/
|
|
public static void setDefaultBundleAndDeferCallback(BundleAndDeferCallback defaultBundleAndDeferCallback) {
|
|
XMPPTCPConnection.defaultBundleAndDeferCallback = defaultBundleAndDeferCallback;
|
|
}
|
|
|
|
/**
|
|
* Set the bundle and defer callback used for this connection.
|
|
* <p>
|
|
* You can use <code>null</code> as argument to reset the callback. Outgoing stanzas will then
|
|
* no longer get deferred.
|
|
* </p>
|
|
*
|
|
* @param bundleAndDeferCallback the callback or <code>null</code>.
|
|
* @see BundleAndDeferCallback
|
|
* @since 4.1
|
|
*/
|
|
public void setBundleandDeferCallback(BundleAndDeferCallback bundleAndDeferCallback) {
|
|
this.bundleAndDeferCallback = bundleAndDeferCallback;
|
|
}
|
|
|
|
}
|