1package eu.siacs.conversations.xmpp;
2
3import android.content.Context;
4import android.graphics.Bitmap;
5import android.graphics.BitmapFactory;
6import android.os.SystemClock;
7import android.security.KeyChain;
8import android.support.annotation.NonNull;
9import android.util.Base64;
10import android.util.Log;
11import android.util.Pair;
12import android.util.SparseArray;
13
14import org.xmlpull.v1.XmlPullParserException;
15
16import java.io.ByteArrayInputStream;
17import java.io.IOException;
18import java.io.InputStream;
19import java.net.ConnectException;
20import java.net.IDN;
21import java.net.InetAddress;
22import java.net.InetSocketAddress;
23import java.net.MalformedURLException;
24import java.net.Socket;
25import java.net.URL;
26import java.net.UnknownHostException;
27import java.security.KeyManagementException;
28import java.security.NoSuchAlgorithmException;
29import java.security.Principal;
30import java.security.PrivateKey;
31import java.security.cert.X509Certificate;
32import java.util.ArrayList;
33import java.util.Arrays;
34import java.util.Collections;
35import java.util.HashMap;
36import java.util.HashSet;
37import java.util.Hashtable;
38import java.util.Iterator;
39import java.util.List;
40import java.util.Map.Entry;
41import java.util.Set;
42import java.util.concurrent.CountDownLatch;
43import java.util.concurrent.TimeUnit;
44import java.util.concurrent.atomic.AtomicBoolean;
45import java.util.concurrent.atomic.AtomicInteger;
46import java.util.regex.Matcher;
47
48import javax.net.ssl.KeyManager;
49import javax.net.ssl.SSLContext;
50import javax.net.ssl.SSLSocket;
51import javax.net.ssl.SSLSocketFactory;
52import javax.net.ssl.X509KeyManager;
53import javax.net.ssl.X509TrustManager;
54
55import eu.siacs.conversations.Config;
56import eu.siacs.conversations.R;
57import eu.siacs.conversations.crypto.DomainHostnameVerifier;
58import eu.siacs.conversations.crypto.XmppDomainVerifier;
59import eu.siacs.conversations.crypto.axolotl.AxolotlService;
60import eu.siacs.conversations.crypto.sasl.Anonymous;
61import eu.siacs.conversations.crypto.sasl.DigestMd5;
62import eu.siacs.conversations.crypto.sasl.External;
63import eu.siacs.conversations.crypto.sasl.Plain;
64import eu.siacs.conversations.crypto.sasl.SaslMechanism;
65import eu.siacs.conversations.crypto.sasl.ScramSha1;
66import eu.siacs.conversations.crypto.sasl.ScramSha256;
67import eu.siacs.conversations.entities.Account;
68import eu.siacs.conversations.entities.Message;
69import eu.siacs.conversations.entities.ServiceDiscoveryResult;
70import eu.siacs.conversations.generator.IqGenerator;
71import eu.siacs.conversations.persistance.FileBackend;
72import eu.siacs.conversations.services.MemorizingTrustManager;
73import eu.siacs.conversations.services.MessageArchiveService;
74import eu.siacs.conversations.services.NotificationService;
75import eu.siacs.conversations.services.XmppConnectionService;
76import eu.siacs.conversations.utils.CryptoHelper;
77import eu.siacs.conversations.utils.Patterns;
78import eu.siacs.conversations.utils.Resolver;
79import eu.siacs.conversations.utils.SSLSocketHelper;
80import eu.siacs.conversations.utils.SocksSocketFactory;
81import eu.siacs.conversations.utils.XmlHelper;
82import eu.siacs.conversations.xml.Element;
83import eu.siacs.conversations.xml.LocalizedContent;
84import eu.siacs.conversations.xml.Namespace;
85import eu.siacs.conversations.xml.Tag;
86import eu.siacs.conversations.xml.TagWriter;
87import eu.siacs.conversations.xml.XmlReader;
88import eu.siacs.conversations.xmpp.forms.Data;
89import eu.siacs.conversations.xmpp.forms.Field;
90import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
91import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
92import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
93import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
94import eu.siacs.conversations.xmpp.stanzas.IqPacket;
95import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
96import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
97import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
98import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
99import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
100import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
101import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
102import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
103
104public class XmppConnection implements Runnable {
105
106 private static final int PACKET_IQ = 0;
107 private static final int PACKET_MESSAGE = 1;
108 private static final int PACKET_PRESENCE = 2;
109 public final OnIqPacketReceived registrationResponseListener = new OnIqPacketReceived() {
110 @Override
111 public void onIqPacketReceived(Account account, IqPacket packet) {
112 if (packet.getType() == IqPacket.TYPE.RESULT) {
113 account.setOption(Account.OPTION_REGISTER, false);
114 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": successfully registered new account on server");
115 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
116 } else {
117 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
118 "The password is too weak",
119 "Please use a longer password.");
120 Element error = packet.findChild("error");
121 Account.State state = Account.State.REGISTRATION_FAILED;
122 if (error != null) {
123 if (error.hasChild("conflict")) {
124 state = Account.State.REGISTRATION_CONFLICT;
125 } else if (error.hasChild("resource-constraint")
126 && "wait".equals(error.getAttribute("type"))) {
127 state = Account.State.REGISTRATION_PLEASE_WAIT;
128 } else if (error.hasChild("not-acceptable")
129 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
130 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
131 }
132 }
133 throw new StateChangingError(state);
134 }
135 }
136 };
137 protected final Account account;
138 private final Features features = new Features(this);
139 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
140 private final HashMap<String, Jid> commands = new HashMap<>();
141 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
142 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
143 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new HashSet<>();
144 private final XmppConnectionService mXmppConnectionService;
145 private Socket socket;
146 private XmlReader tagReader;
147 private TagWriter tagWriter = new TagWriter();
148 private boolean shouldAuthenticate = true;
149 private boolean inSmacksSession = false;
150 private boolean isBound = false;
151 private Element streamFeatures;
152 private String streamId = null;
153 private int smVersion = 3;
154 private int stanzasReceived = 0;
155 private int stanzasSent = 0;
156 private long lastPacketReceived = 0;
157 private long lastPingSent = 0;
158 private long lastConnect = 0;
159 private long lastSessionStarted = 0;
160 private long lastDiscoStarted = 0;
161 private boolean isMamPreferenceAlways = false;
162 private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
163 private AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
164 private AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
165 private AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
166 private boolean mInteractive = false;
167 private int attempt = 0;
168 private OnPresencePacketReceived presenceListener = null;
169 private OnJinglePacketReceived jingleListener = null;
170 private OnIqPacketReceived unregisteredIqListener = null;
171 private OnMessagePacketReceived messageListener = null;
172 private OnStatusChanged statusListener = null;
173 private OnBindListener bindListener = null;
174 private OnMessageAcknowledged acknowledgedListener = null;
175 private SaslMechanism saslMechanism;
176 private URL redirectionUrl = null;
177 private String verifiedHostname = null;
178 private volatile Thread mThread;
179 private CountDownLatch mStreamCountDownLatch;
180
181
182 public XmppConnection(final Account account, final XmppConnectionService service) {
183 this.account = account;
184 this.mXmppConnectionService = service;
185 }
186
187 private static void fixResource(Context context, Account account) {
188 String resource = account.getResource();
189 int fixedPartLength = context.getString(R.string.app_name).length() + 1; //include the trailing dot
190 int randomPartLength = 4; // 3 bytes
191 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
192 if (validBase64(resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
193 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
194 }
195 }
196 }
197
198 private static boolean validBase64(String input) {
199 try {
200 return Base64.decode(input, Base64.URL_SAFE).length == 3;
201 } catch (Throwable throwable) {
202 return false;
203 }
204 }
205
206 private void changeStatus(final Account.State nextStatus) {
207 synchronized (this) {
208 if (Thread.currentThread().isInterrupted()) {
209 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not changing status to " + nextStatus + " because thread was interrupted");
210 return;
211 }
212 if (account.getStatus() != nextStatus) {
213 if ((nextStatus == Account.State.OFFLINE)
214 && (account.getStatus() != Account.State.CONNECTING)
215 && (account.getStatus() != Account.State.ONLINE)
216 && (account.getStatus() != Account.State.DISABLED)) {
217 return;
218 }
219 if (nextStatus == Account.State.ONLINE) {
220 this.attempt = 0;
221 }
222 account.setStatus(nextStatus);
223 } else {
224 return;
225 }
226 }
227 if (statusListener != null) {
228 statusListener.onStatusChanged(account);
229 }
230 }
231
232 public Jid getJidForCommand(final String node) {
233 synchronized (this.commands) {
234 return this.commands.get(node);
235 }
236 }
237
238 public void prepareNewConnection() {
239 this.lastConnect = SystemClock.elapsedRealtime();
240 this.lastPingSent = SystemClock.elapsedRealtime();
241 this.lastDiscoStarted = Long.MAX_VALUE;
242 this.mWaitingForSmCatchup.set(false);
243 this.changeStatus(Account.State.CONNECTING);
244 }
245
246 public boolean isWaitingForSmCatchup() {
247 return mWaitingForSmCatchup.get();
248 }
249
250 public void incrementSmCatchupMessageCounter() {
251 this.mSmCatchupMessageCounter.incrementAndGet();
252 }
253
254 protected void connect() {
255 if (mXmppConnectionService.areMessagesInitialized()) {
256 mXmppConnectionService.resetSendingToWaiting(account);
257 }
258 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
259 features.encryptionEnabled = false;
260 inSmacksSession = false;
261 isBound = false;
262 this.attempt++;
263 this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec
264 try {
265 Socket localSocket;
266 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
267 this.changeStatus(Account.State.CONNECTING);
268 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
269 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
270 if (useTor) {
271 String destination;
272 if (account.getHostname().isEmpty() || account.isOnion()) {
273 destination = account.getServer();
274 } else {
275 destination = account.getHostname();
276 this.verifiedHostname = destination;
277 }
278
279 final int port = account.getPort();
280 final boolean directTls = Resolver.useDirectTls(port);
281
282 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor. directTls=" + directTls);
283 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
284
285 if (directTls) {
286 localSocket = upgradeSocketToTls(localSocket);
287 features.encryptionEnabled = true;
288 }
289
290 try {
291 startXmpp(localSocket);
292 } catch (InterruptedException e) {
293 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
294 return;
295 } catch (Exception e) {
296 throw new IOException(e.getMessage());
297 }
298 } else {
299 final String domain = account.getServer();
300 final List<Resolver.Result> results;
301 final boolean hardcoded = extended && !account.getHostname().isEmpty();
302 if (hardcoded) {
303 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
304 } else {
305 results = Resolver.resolve(domain);
306 }
307 if (Thread.currentThread().isInterrupted()) {
308 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
309 return;
310 }
311 if (results.size() == 0) {
312 Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": Resolver results were empty");
313 return;
314 }
315 final Resolver.Result storedBackupResult;
316 if (hardcoded) {
317 storedBackupResult = null;
318 } else {
319 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
320 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
321 results.add(storedBackupResult);
322 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
323 }
324 }
325 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
326 final Resolver.Result result = iterator.next();
327 if (Thread.currentThread().isInterrupted()) {
328 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
329 return;
330 }
331 try {
332 // if tls is true, encryption is implied and must not be started
333 features.encryptionEnabled = result.isDirectTls();
334 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
335 Log.d(Config.LOGTAG, "verified hostname " + verifiedHostname);
336 final InetSocketAddress addr;
337 if (result.getIp() != null) {
338 addr = new InetSocketAddress(result.getIp(), result.getPort());
339 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
340 + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
341 + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
342 } else {
343 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
344 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
345 + ": using values from resolver "
346 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
347 }
348
349 localSocket = new Socket();
350 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
351
352 if (features.encryptionEnabled) {
353 localSocket = upgradeSocketToTls(localSocket);
354 }
355
356 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
357 if (startXmpp(localSocket)) {
358 localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
359 if (!hardcoded && !result.equals(storedBackupResult)) {
360 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
361 }
362 break; // successfully connected to server that speaks xmpp
363 } else {
364 FileBackend.close(localSocket);
365 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
366 }
367 } catch (final StateChangingException e) {
368 if (!iterator.hasNext()) {
369 throw e;
370 }
371 } catch (InterruptedException e) {
372 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
373 return;
374 } catch (final Throwable e) {
375 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
376 if (!iterator.hasNext()) {
377 throw new UnknownHostException();
378 }
379 }
380 }
381 }
382 processStream();
383 } catch (final SecurityException e) {
384 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
385 } catch (final StateChangingException e) {
386 this.changeStatus(e.state);
387 } catch (final UnknownHostException | ConnectException e) {
388 this.changeStatus(Account.State.SERVER_NOT_FOUND);
389 } catch (final SocksSocketFactory.HostNotFoundException e) {
390 this.changeStatus(Account.State.SERVER_NOT_FOUND);
391 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
392 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
393 } catch (final IOException | XmlPullParserException e) {
394 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
395 this.changeStatus(Account.State.OFFLINE);
396 this.attempt = Math.max(0, this.attempt - 1);
397 } finally {
398 if (!Thread.currentThread().isInterrupted()) {
399 forceCloseSocket();
400 } else {
401 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
402 }
403 }
404 }
405
406 /**
407 * Starts xmpp protocol, call after connecting to socket
408 *
409 * @return true if server returns with valid xmpp, false otherwise
410 */
411 private boolean startXmpp(Socket socket) throws Exception {
412 if (Thread.currentThread().isInterrupted()) {
413 throw new InterruptedException();
414 }
415 this.socket = socket;
416 tagReader = new XmlReader();
417 if (tagWriter != null) {
418 tagWriter.forceClose();
419 }
420 tagWriter = new TagWriter();
421 tagWriter.setOutputStream(socket.getOutputStream());
422 tagReader.setInputStream(socket.getInputStream());
423 tagWriter.beginDocument();
424 sendStartStream();
425 final Tag tag = tagReader.readTag();
426 if (Thread.currentThread().isInterrupted()) {
427 throw new InterruptedException();
428 }
429 if (socket instanceof SSLSocket) {
430 SSLSocketHelper.log(account, (SSLSocket) socket);
431 }
432 return tag != null && tag.isStart("stream");
433 }
434
435 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
436 final SSLContext sc = SSLSocketHelper.getSSLContext();
437 final MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
438 final KeyManager[] keyManager;
439 if (account.getPrivateKeyAlias() != null) {
440 keyManager = new KeyManager[]{new MyKeyManager()};
441 } else {
442 keyManager = null;
443 }
444 final String domain = account.getServer();
445 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
446 final SSLSocketFactory factory = sc.getSocketFactory();
447 final DomainHostnameVerifier verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier(), mInteractive);
448 return new TlsFactoryVerifier(factory, verifier);
449 }
450
451 @Override
452 public void run() {
453 synchronized (this) {
454 this.mThread = Thread.currentThread();
455 if (this.mThread.isInterrupted()) {
456 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
457 return;
458 }
459 forceCloseSocket();
460 }
461 connect();
462 }
463
464 private void processStream() throws XmlPullParserException, IOException {
465 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
466 this.mStreamCountDownLatch = streamCountDownLatch;
467 Tag nextTag = tagReader.readTag();
468 while (nextTag != null && !nextTag.isEnd("stream")) {
469 if (nextTag.isStart("error")) {
470 processStreamError(nextTag);
471 } else if (nextTag.isStart("features")) {
472 processStreamFeatures(nextTag);
473 } else if (nextTag.isStart("proceed")) {
474 switchOverToTls();
475 } else if (nextTag.isStart("success")) {
476 final String challenge = tagReader.readElement(nextTag).getContent();
477 try {
478 saslMechanism.getResponse(challenge);
479 } catch (final SaslMechanism.AuthenticationException e) {
480 Log.e(Config.LOGTAG, String.valueOf(e));
481 throw new StateChangingException(Account.State.UNAUTHORIZED);
482 }
483 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in");
484 account.setKey(Account.PINNED_MECHANISM_KEY,
485 String.valueOf(saslMechanism.getPriority()));
486 tagReader.reset();
487 sendStartStream();
488 final Tag tag = tagReader.readTag();
489 if (tag != null && tag.isStart("stream")) {
490 processStream();
491 } else {
492 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
493 }
494 break;
495 } else if (nextTag.isStart("failure")) {
496 final Element failure = tagReader.readElement(nextTag);
497 if (Namespace.SASL.equals(failure.getNamespace())) {
498 final String text = failure.findChildContent("text");
499 if (failure.hasChild("account-disabled") && text != null) {
500 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
501 if (matcher.find()) {
502 try {
503 URL url = new URL(text.substring(matcher.start(), matcher.end()));
504 if (url.getProtocol().equals("https")) {
505 this.redirectionUrl = url;
506 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
507 }
508 } catch (MalformedURLException e) {
509 throw new StateChangingException(Account.State.UNAUTHORIZED);
510 }
511 }
512 }
513 throw new StateChangingException(Account.State.UNAUTHORIZED);
514 } else if (Namespace.TLS.equals(failure.getNamespace())) {
515 throw new StateChangingException(Account.State.TLS_ERROR);
516 } else {
517 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
518 }
519 } else if (nextTag.isStart("challenge")) {
520 final String challenge = tagReader.readElement(nextTag).getContent();
521 final Element response = new Element("response", Namespace.SASL);
522 try {
523 response.setContent(saslMechanism.getResponse(challenge));
524 } catch (final SaslMechanism.AuthenticationException e) {
525 // TODO: Send auth abort tag.
526 Log.e(Config.LOGTAG, e.toString());
527 }
528 tagWriter.writeElement(response);
529 } else if (nextTag.isStart("enabled")) {
530 final Element enabled = tagReader.readElement(nextTag);
531 if ("true".equals(enabled.getAttribute("resume"))) {
532 this.streamId = enabled.getAttribute("id");
533 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
534 + ": stream management(" + smVersion
535 + ") enabled (resumable)");
536 } else {
537 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
538 + ": stream management(" + smVersion + ") enabled");
539 }
540 this.stanzasReceived = 0;
541 this.inSmacksSession = true;
542 final RequestPacket r = new RequestPacket(smVersion);
543 tagWriter.writeStanzaAsync(r);
544 } else if (nextTag.isStart("resumed")) {
545 this.inSmacksSession = true;
546 this.isBound = true;
547 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
548 lastPacketReceived = SystemClock.elapsedRealtime();
549 final Element resumed = tagReader.readElement(nextTag);
550 final String h = resumed.getAttribute("h");
551 try {
552 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
553 final boolean acknowledgedMessages;
554 synchronized (this.mStanzaQueue) {
555 final int serverCount = Integer.parseInt(h);
556 if (serverCount < stanzasSent) {
557 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
558 + ": session resumed with lost packages");
559 stanzasSent = serverCount;
560 } else {
561 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
562 }
563 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
564 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
565 failedStanzas.add(mStanzaQueue.valueAt(i));
566 }
567 mStanzaQueue.clear();
568 }
569 if (acknowledgedMessages) {
570 mXmppConnectionService.updateConversationUi();
571 }
572 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
573 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
574 if (packet instanceof MessagePacket) {
575 MessagePacket message = (MessagePacket) packet;
576 mXmppConnectionService.markMessage(account,
577 message.getTo().asBareJid(),
578 message.getId(),
579 Message.STATUS_UNSEND);
580 }
581 sendPacket(packet);
582 }
583 } catch (final NumberFormatException ignored) {
584 }
585 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
586 changeStatus(Account.State.ONLINE);
587 } else if (nextTag.isStart("r")) {
588 tagReader.readElement(nextTag);
589 if (Config.EXTENDED_SM_LOGGING) {
590 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
591 }
592 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
593 tagWriter.writeStanzaAsync(ack);
594 } else if (nextTag.isStart("a")) {
595 boolean accountUiNeedsRefresh = false;
596 synchronized (NotificationService.CATCHUP_LOCK) {
597 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
598 final int messageCount = mSmCatchupMessageCounter.get();
599 final int pendingIQs = packetCallbacks.size();
600 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (messages=" + messageCount + ", pending IQs=" + pendingIQs + ")");
601 accountUiNeedsRefresh = true;
602 if (messageCount > 0) {
603 mXmppConnectionService.getNotificationService().finishBacklog(true, account);
604 }
605 }
606 }
607 if (accountUiNeedsRefresh) {
608 mXmppConnectionService.updateAccountUi();
609 }
610 final Element ack = tagReader.readElement(nextTag);
611 lastPacketReceived = SystemClock.elapsedRealtime();
612 try {
613 final boolean acknowledgedMessages;
614 synchronized (this.mStanzaQueue) {
615 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
616 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
617 }
618 if (acknowledgedMessages) {
619 mXmppConnectionService.updateConversationUi();
620 }
621 } catch (NumberFormatException | NullPointerException e) {
622 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
623 }
624 } else if (nextTag.isStart("failed")) {
625 Element failed = tagReader.readElement(nextTag);
626 try {
627 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
628 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
629 final boolean acknowledgedMessages;
630 synchronized (this.mStanzaQueue) {
631 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
632 }
633 if (acknowledgedMessages) {
634 mXmppConnectionService.updateConversationUi();
635 }
636 } catch (NumberFormatException | NullPointerException e) {
637 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
638 }
639 resetStreamId();
640 sendBindRequest();
641 } else if (nextTag.isStart("iq")) {
642 processIq(nextTag);
643 } else if (nextTag.isStart("message")) {
644 processMessage(nextTag);
645 } else if (nextTag.isStart("presence")) {
646 processPresence(nextTag);
647 }
648 nextTag = tagReader.readTag();
649 }
650 if (nextTag != null && nextTag.isEnd("stream")) {
651 streamCountDownLatch.countDown();
652 }
653 }
654
655 private boolean acknowledgeStanzaUpTo(int serverCount) {
656 if (serverCount > stanzasSent) {
657 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
658 }
659 boolean acknowledgedMessages = false;
660 for (int i = 0; i < mStanzaQueue.size(); ++i) {
661 if (serverCount >= mStanzaQueue.keyAt(i)) {
662 if (Config.EXTENDED_SM_LOGGING) {
663 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
664 }
665 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
666 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
667 MessagePacket packet = (MessagePacket) stanza;
668 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, packet.getId());
669 }
670 mStanzaQueue.removeAt(i);
671 i--;
672 }
673 }
674 return acknowledgedMessages;
675 }
676
677 private @NonNull
678 Element processPacket(final Tag currentTag, final int packetType) throws IOException {
679 final Element element;
680 switch (packetType) {
681 case PACKET_IQ:
682 element = new IqPacket();
683 break;
684 case PACKET_MESSAGE:
685 element = new MessagePacket();
686 break;
687 case PACKET_PRESENCE:
688 element = new PresencePacket();
689 break;
690 default:
691 throw new AssertionError("Should never encounter invalid type");
692 }
693 element.setAttributes(currentTag.getAttributes());
694 Tag nextTag = tagReader.readTag();
695 if (nextTag == null) {
696 throw new IOException("interrupted mid tag");
697 }
698 while (!nextTag.isEnd(element.getName())) {
699 if (!nextTag.isNo()) {
700 element.addChild(tagReader.readElement(nextTag));
701 }
702 nextTag = tagReader.readTag();
703 if (nextTag == null) {
704 throw new IOException("interrupted mid tag");
705 }
706 }
707 if (stanzasReceived == Integer.MAX_VALUE) {
708 resetStreamId();
709 throw new IOException("time to restart the session. cant handle >2 billion pcks");
710 }
711 if (inSmacksSession) {
712 ++stanzasReceived;
713 } else if (features.sm()) {
714 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
715 }
716 lastPacketReceived = SystemClock.elapsedRealtime();
717 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
718 Log.d(Config.LOGTAG, "[background stanza] " + element);
719 }
720 if (element instanceof IqPacket
721 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
722 && element.hasChild("jingle", Namespace.JINGLE)) {
723 return JinglePacket.upgrade((IqPacket) element);
724 } else {
725 return element;
726 }
727 }
728
729 private void processIq(final Tag currentTag) throws IOException {
730 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
731 if (!packet.valid()) {
732 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
733 return;
734 }
735 if (packet instanceof JinglePacket) {
736 if (this.jingleListener != null) {
737 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
738 }
739 } else {
740 OnIqPacketReceived callback = null;
741 synchronized (this.packetCallbacks) {
742 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
743 if (packetCallbackDuple != null) {
744 // Packets to the server should have responses from the server
745 if (packetCallbackDuple.first.toServer(account)) {
746 if (packet.fromServer(account)) {
747 callback = packetCallbackDuple.second;
748 packetCallbacks.remove(packet.getId());
749 } else {
750 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
751 }
752 } else {
753 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
754 callback = packetCallbackDuple.second;
755 packetCallbacks.remove(packet.getId());
756 } else {
757 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
758 }
759 }
760 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
761 callback = this.unregisteredIqListener;
762 }
763 }
764 if (callback != null) {
765 try {
766 callback.onIqPacketReceived(account, packet);
767 } catch (StateChangingError error) {
768 throw new StateChangingException(error.state);
769 }
770 }
771 }
772 }
773
774 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
775 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
776 if (!packet.valid()) {
777 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
778 return;
779 }
780 this.messageListener.onMessagePacketReceived(account, packet);
781 }
782
783 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
784 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
785 if (!packet.valid()) {
786 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
787 return;
788 }
789 this.presenceListener.onPresencePacketReceived(account, packet);
790 }
791
792 private void sendStartTLS() throws IOException {
793 final Tag startTLS = Tag.empty("starttls");
794 startTLS.setAttribute("xmlns", Namespace.TLS);
795 tagWriter.writeTag(startTLS);
796 }
797
798 private void switchOverToTls() throws XmlPullParserException, IOException {
799 tagReader.readTag();
800 final Socket socket = this.socket;
801 final SSLSocket sslSocket = upgradeSocketToTls(socket);
802 tagReader.setInputStream(sslSocket.getInputStream());
803 tagWriter.setOutputStream(sslSocket.getOutputStream());
804 sendStartStream();
805 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
806 features.encryptionEnabled = true;
807 final Tag tag = tagReader.readTag();
808 if (tag != null && tag.isStart("stream")) {
809 SSLSocketHelper.log(account, sslSocket);
810 processStream();
811 } else {
812 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
813 }
814 sslSocket.close();
815 }
816
817 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
818 final TlsFactoryVerifier tlsFactoryVerifier;
819 try {
820 tlsFactoryVerifier = getTlsFactoryVerifier();
821 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
822 throw new StateChangingException(Account.State.TLS_ERROR);
823 }
824 final InetAddress address = socket.getInetAddress();
825 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
826 SSLSocketHelper.setSecurity(sslSocket);
827 SSLSocketHelper.setHostname(sslSocket, account.getServer());
828 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
829 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
830 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
831 FileBackend.close(sslSocket);
832 throw new StateChangingException(Account.State.TLS_ERROR);
833 }
834 return sslSocket;
835 }
836
837 private void processStreamFeatures(final Tag currentTag) throws XmlPullParserException, IOException {
838 this.streamFeatures = tagReader.readElement(currentTag);
839 final boolean isSecure = features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
840 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
841 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
842 sendStartTLS();
843 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
844 if (isSecure) {
845 register();
846 } else {
847 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find STARTTLS for registration process " + XmlHelper.printElementNames(this.streamFeatures));
848 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
849 }
850 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
851 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
852 } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && isSecure) {
853 authenticate();
854 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
855 if (Config.EXTENDED_SM_LOGGING) {
856 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resuming after stanza #" + stanzasReceived);
857 }
858 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
859 this.mSmCatchupMessageCounter.set(0);
860 this.mWaitingForSmCatchup.set(true);
861 this.tagWriter.writeStanzaAsync(resume);
862 } else if (needsBinding) {
863 if (this.streamFeatures.hasChild("bind") && isSecure) {
864 sendBindRequest();
865 } else {
866 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find bind feature " + XmlHelper.printElementNames(this.streamFeatures));
867 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
868 }
869 }
870 }
871
872 private void authenticate() throws IOException {
873 final List<String> mechanisms = extractMechanisms(streamFeatures
874 .findChild("mechanisms"));
875 final Element auth = new Element("auth", Namespace.SASL);
876 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
877 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
878 } else if (mechanisms.contains("SCRAM-SHA-256")) {
879 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
880 } else if (mechanisms.contains("SCRAM-SHA-1")) {
881 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
882 } else if (mechanisms.contains("PLAIN") && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
883 saslMechanism = new Plain(tagWriter, account);
884 } else if (mechanisms.contains("DIGEST-MD5")) {
885 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
886 } else if (mechanisms.contains("ANONYMOUS")) {
887 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
888 }
889 if (saslMechanism != null) {
890 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
891 if (pinnedMechanism > saslMechanism.getPriority()) {
892 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
893 " has lower priority (" + saslMechanism.getPriority() +
894 ") than pinned priority (" + pinnedMechanism +
895 "). Possible downgrade attack?");
896 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
897 }
898 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
899 auth.setAttribute("mechanism", saslMechanism.getMechanism());
900 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
901 auth.setContent(saslMechanism.getClientFirstMessage());
902 }
903 tagWriter.writeElement(auth);
904 } else {
905 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find supported SASL mechanism in " + mechanisms);
906 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
907 }
908 }
909
910 private List<String> extractMechanisms(final Element stream) {
911 final ArrayList<String> mechanisms = new ArrayList<>(stream
912 .getChildren().size());
913 for (final Element child : stream.getChildren()) {
914 mechanisms.add(child.getContent());
915 }
916 return mechanisms;
917 }
918
919
920 private void register() {
921 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
922 if (preAuth != null && features.invite()) {
923 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
924 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
925 sendUnmodifiedIqPacket(preAuthRequest, (account, response) -> {
926 if (response.getType() == IqPacket.TYPE.RESULT) {
927 sendRegistryRequest();
928 } else {
929 final Element error = response.getError();
930 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": failed to pre auth. " + error);
931 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
932 }
933 }, true);
934 } else {
935 sendRegistryRequest();
936 }
937 }
938
939 private void sendRegistryRequest() {
940 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
941 register.query(Namespace.REGISTER);
942 register.setTo(account.getDomain());
943 sendUnmodifiedIqPacket(register, (account, packet) -> {
944 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
945 return;
946 }
947 if (packet.getType() == IqPacket.TYPE.ERROR) {
948 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
949 }
950 final Element query = packet.query(Namespace.REGISTER);
951 if (query.hasChild("username") && (query.hasChild("password"))) {
952 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
953 final Element username = new Element("username").setContent(account.getUsername());
954 final Element password = new Element("password").setContent(account.getPassword());
955 register1.query(Namespace.REGISTER).addChild(username);
956 register1.query().addChild(password);
957 register1.setFrom(account.getJid().asBareJid());
958 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
959 } else if (query.hasChild("x", Namespace.DATA)) {
960 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
961 final Element blob = query.findChild("data", "urn:xmpp:bob");
962 final String id = packet.getId();
963 InputStream is;
964 if (blob != null) {
965 try {
966 final String base64Blob = blob.getContent();
967 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
968 is = new ByteArrayInputStream(strBlob);
969 } catch (Exception e) {
970 is = null;
971 }
972 } else {
973 try {
974 Field field = data.getFieldByName("url");
975 URL url = field != null && field.getValue() != null ? new URL(field.getValue()) : null;
976 is = url != null ? url.openStream() : null;
977 } catch (IOException e) {
978 is = null;
979 }
980 }
981
982 if (is != null) {
983 Bitmap captcha = BitmapFactory.decodeStream(is);
984 try {
985 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
986 return;
987 }
988 } catch (Exception e) {
989 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
990 }
991 }
992 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
993 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
994 final String instructions = query.findChildContent("instructions");
995 final Element oob = query.findChild("x", Namespace.OOB);
996 final String url = oob == null ? null : oob.findChildContent("url");
997 if (url != null) {
998 setAccountCreationFailed(url);
999 } else if (instructions != null) {
1000 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1001 if (matcher.find()) {
1002 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
1003 }
1004 }
1005 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1006 }
1007 }, true);
1008 }
1009
1010 private void setAccountCreationFailed(String url) {
1011 if (url != null) {
1012 try {
1013 this.redirectionUrl = new URL(url);
1014 if (this.redirectionUrl.getProtocol().equals("https")) {
1015 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1016 }
1017 } catch (MalformedURLException e) {
1018 //fall through
1019 }
1020 }
1021 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1022 }
1023
1024 public URL getRedirectionUrl() {
1025 return this.redirectionUrl;
1026 }
1027
1028 public void resetEverything() {
1029 resetAttemptCount(true);
1030 resetStreamId();
1031 clearIqCallbacks();
1032 this.stanzasSent = 0;
1033 mStanzaQueue.clear();
1034 this.redirectionUrl = null;
1035 synchronized (this.disco) {
1036 disco.clear();
1037 }
1038 synchronized (this.commands) {
1039 this.commands.clear();
1040 }
1041 }
1042
1043 private void sendBindRequest() {
1044 try {
1045 mXmppConnectionService.restoredFromDatabaseLatch.await();
1046 } catch (InterruptedException e) {
1047 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1048 return;
1049 }
1050 clearIqCallbacks();
1051 if (account.getJid().isBareJid()) {
1052 account.setResource(this.createNewResource());
1053 } else {
1054 fixResource(mXmppConnectionService, account);
1055 }
1056 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1057 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1058 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1059 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1060 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1061 return;
1062 }
1063 final Element bind = packet.findChild("bind");
1064 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1065 isBound = true;
1066 final Element jid = bind.findChild("jid");
1067 if (jid != null && jid.getContent() != null) {
1068 try {
1069 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1070 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1071 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1072 throw new StateChangingError(Account.State.BIND_FAILURE);
1073 }
1074 if (account.setJid(assignedJid)) {
1075 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1076 mXmppConnectionService.databaseBackend.updateAccount(account);
1077 }
1078 if (streamFeatures.hasChild("session")
1079 && !streamFeatures.findChild("session").hasChild("optional")) {
1080 sendStartSession();
1081 } else {
1082 sendPostBindInitialization();
1083 }
1084 return;
1085 } catch (final IllegalArgumentException e) {
1086 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1087 }
1088 } else {
1089 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1090 }
1091 } else {
1092 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1093 }
1094 final Element error = packet.findChild("error");
1095 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1096 account.setResource(createNewResource());
1097 }
1098 throw new StateChangingError(Account.State.BIND_FAILURE);
1099 }, true);
1100 }
1101
1102 private void clearIqCallbacks() {
1103 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1104 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1105 synchronized (this.packetCallbacks) {
1106 if (this.packetCallbacks.size() == 0) {
1107 return;
1108 }
1109 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1110 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1111 while (iterator.hasNext()) {
1112 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1113 callbacks.add(entry.second);
1114 iterator.remove();
1115 }
1116 }
1117 for (OnIqPacketReceived callback : callbacks) {
1118 try {
1119 callback.onIqPacketReceived(account, failurePacket);
1120 } catch (StateChangingError error) {
1121 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1122 //ignore
1123 }
1124 }
1125 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1126 }
1127
1128 public void sendDiscoTimeout() {
1129 if (mWaitForDisco.compareAndSet(true, false)) {
1130 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1131 finalizeBind();
1132 }
1133 }
1134
1135 private void sendStartSession() {
1136 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1137 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1138 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1139 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1140 if (packet.getType() == IqPacket.TYPE.RESULT) {
1141 sendPostBindInitialization();
1142 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1143 throw new StateChangingError(Account.State.SESSION_FAILURE);
1144 }
1145 }, true);
1146 }
1147
1148 private void sendPostBindInitialization() {
1149 smVersion = 0;
1150 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1151 smVersion = 3;
1152 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1153 smVersion = 2;
1154 }
1155 if (smVersion != 0) {
1156 synchronized (this.mStanzaQueue) {
1157 final EnablePacket enable = new EnablePacket(smVersion);
1158 tagWriter.writeStanzaAsync(enable);
1159 stanzasSent = 0;
1160 mStanzaQueue.clear();
1161 }
1162 }
1163 features.carbonsEnabled = false;
1164 features.blockListRequested = false;
1165 synchronized (this.disco) {
1166 this.disco.clear();
1167 }
1168 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1169 mPendingServiceDiscoveries.set(0);
1170 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain().toEscapedString())) {
1171 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1172 mWaitForDisco.set(false);
1173 } else {
1174 mWaitForDisco.set(true);
1175 }
1176 lastDiscoStarted = SystemClock.elapsedRealtime();
1177 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1178 Element caps = streamFeatures.findChild("c");
1179 final String hash = caps == null ? null : caps.getAttribute("hash");
1180 final String ver = caps == null ? null : caps.getAttribute("ver");
1181 ServiceDiscoveryResult discoveryResult = null;
1182 if (hash != null && ver != null) {
1183 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1184 }
1185 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1186 if (requestDiscoItemsFirst) {
1187 sendServiceDiscoveryItems(account.getDomain());
1188 }
1189 if (discoveryResult == null) {
1190 sendServiceDiscoveryInfo(account.getDomain());
1191 } else {
1192 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1193 disco.put(account.getDomain(), discoveryResult);
1194 }
1195 discoverMamPreferences();
1196 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1197 if (!requestDiscoItemsFirst) {
1198 sendServiceDiscoveryItems(account.getDomain());
1199 }
1200
1201 if (!mWaitForDisco.get()) {
1202 finalizeBind();
1203 }
1204 this.lastSessionStarted = SystemClock.elapsedRealtime();
1205 }
1206
1207 private void sendServiceDiscoveryInfo(final Jid jid) {
1208 mPendingServiceDiscoveries.incrementAndGet();
1209 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1210 iq.setTo(jid);
1211 iq.query("http://jabber.org/protocol/disco#info");
1212 this.sendIqPacket(iq, (account, packet) -> {
1213 if (packet.getType() == IqPacket.TYPE.RESULT) {
1214 boolean advancedStreamFeaturesLoaded;
1215 synchronized (XmppConnection.this.disco) {
1216 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1217 if (jid.equals(account.getDomain())) {
1218 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1219 }
1220 disco.put(jid, result);
1221 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain())
1222 && disco.containsKey(account.getJid().asBareJid());
1223 }
1224 if (advancedStreamFeaturesLoaded && (jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid()))) {
1225 enableAdvancedStreamFeatures();
1226 }
1227 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1228 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1229 final boolean serverOrAccount = jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid());
1230 final boolean advancedStreamFeaturesLoaded;
1231 if (serverOrAccount) {
1232 synchronized (XmppConnection.this.disco) {
1233 disco.put(jid, ServiceDiscoveryResult.empty());
1234 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain()) && disco.containsKey(account.getJid().asBareJid());
1235 }
1236 } else {
1237 advancedStreamFeaturesLoaded = false;
1238 }
1239 if (advancedStreamFeaturesLoaded) {
1240 enableAdvancedStreamFeatures();
1241 }
1242 }
1243 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1244 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1245 && mWaitForDisco.compareAndSet(true, false)) {
1246 finalizeBind();
1247 }
1248 }
1249 });
1250 }
1251
1252 private void discoverMamPreferences() {
1253 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1254 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1255 sendIqPacket(request, (account, response) -> {
1256 if (response.getType() == IqPacket.TYPE.RESULT) {
1257 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1258 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1259 }
1260 });
1261 }
1262
1263 private void discoverCommands() {
1264 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1265 request.setTo(account.getDomain());
1266 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1267 sendIqPacket(request, (account, response) -> {
1268 if (response.getType() == IqPacket.TYPE.RESULT) {
1269 final Element query = response.findChild("query",Namespace.DISCO_ITEMS);
1270 if (query == null) {
1271 return;
1272 }
1273 final HashMap<String, Jid> commands = new HashMap<>();
1274 for(final Element child : query.getChildren()) {
1275 if ("item".equals(child.getName())) {
1276 final String node = child.getAttribute("node");
1277 final Jid jid = child.getAttributeAsJid("jid");
1278 if (node != null && jid != null) {
1279 commands.put(node, jid);
1280 }
1281 }
1282 }
1283 Log.d(Config.LOGTAG,commands.toString());
1284 synchronized (this.commands) {
1285 this.commands.clear();
1286 this.commands.putAll(commands);
1287 }
1288 }
1289 });
1290 }
1291
1292 public boolean isMamPreferenceAlways() {
1293 return isMamPreferenceAlways;
1294 }
1295
1296 private void finalizeBind() {
1297 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1298 if (bindListener != null) {
1299 bindListener.onBind(account);
1300 }
1301 changeStatus(Account.State.ONLINE);
1302 }
1303
1304 private void enableAdvancedStreamFeatures() {
1305 if (getFeatures().blocking() && !features.blockListRequested) {
1306 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1307 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1308 }
1309 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1310 listener.onAdvancedStreamFeaturesAvailable(account);
1311 }
1312 if (getFeatures().carbons() && !features.carbonsEnabled) {
1313 sendEnableCarbons();
1314 }
1315 if (getFeatures().commands()) {
1316 discoverCommands();
1317 }
1318 }
1319
1320 private void sendServiceDiscoveryItems(final Jid server) {
1321 mPendingServiceDiscoveries.incrementAndGet();
1322 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1323 iq.setTo(server.getDomain());
1324 iq.query("http://jabber.org/protocol/disco#items");
1325 this.sendIqPacket(iq, (account, packet) -> {
1326 if (packet.getType() == IqPacket.TYPE.RESULT) {
1327 HashSet<Jid> items = new HashSet<Jid>();
1328 final List<Element> elements = packet.query().getChildren();
1329 for (final Element element : elements) {
1330 if (element.getName().equals("item")) {
1331 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1332 if (jid != null && !jid.equals(account.getDomain())) {
1333 items.add(jid);
1334 }
1335 }
1336 }
1337 for (Jid jid : items) {
1338 sendServiceDiscoveryInfo(jid);
1339 }
1340 } else {
1341 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1342 }
1343 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1344 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1345 && mWaitForDisco.compareAndSet(true, false)) {
1346 finalizeBind();
1347 }
1348 }
1349 });
1350 }
1351
1352 private void sendEnableCarbons() {
1353 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1354 iq.addChild("enable", "urn:xmpp:carbons:2");
1355 this.sendIqPacket(iq, new OnIqPacketReceived() {
1356
1357 @Override
1358 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1359 if (!packet.hasChild("error")) {
1360 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1361 + ": successfully enabled carbons");
1362 features.carbonsEnabled = true;
1363 } else {
1364 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1365 + ": error enableing carbons " + packet.toString());
1366 }
1367 }
1368 });
1369 }
1370
1371 private void processStreamError(final Tag currentTag) throws XmlPullParserException, IOException {
1372 final Element streamError = tagReader.readElement(currentTag);
1373 if (streamError == null) {
1374 return;
1375 }
1376 if (streamError.hasChild("conflict")) {
1377 account.setResource(createNewResource());
1378 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1379 throw new IOException();
1380 } else if (streamError.hasChild("host-unknown")) {
1381 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1382 } else if (streamError.hasChild("policy-violation")) {
1383 this.lastConnect = SystemClock.elapsedRealtime();
1384 final String text = streamError.findChildContent("text");
1385 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1386 failPendingMessages(text);
1387 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1388 } else {
1389 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString());
1390 throw new StateChangingException(Account.State.STREAM_ERROR);
1391 }
1392 }
1393
1394 private void failPendingMessages(final String error) {
1395 synchronized (this.mStanzaQueue) {
1396 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1397 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1398 if (stanza instanceof MessagePacket) {
1399 final MessagePacket packet = (MessagePacket) stanza;
1400 final String id = packet.getId();
1401 final Jid to = packet.getTo();
1402 mXmppConnectionService.markMessage(account,
1403 to.asBareJid(),
1404 id,
1405 Message.STATUS_SEND_FAILED,
1406 error);
1407 }
1408 }
1409 }
1410 }
1411
1412 private void sendStartStream() throws IOException {
1413 final Tag stream = Tag.start("stream:stream");
1414 stream.setAttribute("to", account.getServer());
1415 stream.setAttribute("version", "1.0");
1416 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1417 stream.setAttribute("xmlns", "jabber:client");
1418 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1419 tagWriter.writeTag(stream);
1420 }
1421
1422 private String createNewResource() {
1423 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1424 }
1425
1426 private String nextRandomId() {
1427 return nextRandomId(false);
1428 }
1429
1430 private String nextRandomId(boolean s) {
1431 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1432 }
1433
1434 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1435 packet.setFrom(account.getJid());
1436 return this.sendUnmodifiedIqPacket(packet, callback, false);
1437 }
1438
1439 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1440 if (packet.getId() == null) {
1441 packet.setAttribute("id", nextRandomId());
1442 }
1443 if (callback != null) {
1444 synchronized (this.packetCallbacks) {
1445 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1446 }
1447 }
1448 this.sendPacket(packet, force);
1449 return packet.getId();
1450 }
1451
1452 public void sendMessagePacket(final MessagePacket packet) {
1453 this.sendPacket(packet);
1454 }
1455
1456 public void sendPresencePacket(final PresencePacket packet) {
1457 this.sendPacket(packet);
1458 }
1459
1460 private synchronized void sendPacket(final AbstractStanza packet) {
1461 sendPacket(packet, false);
1462 }
1463
1464 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1465 if (stanzasSent == Integer.MAX_VALUE) {
1466 resetStreamId();
1467 disconnect(true);
1468 return;
1469 }
1470 synchronized (this.mStanzaQueue) {
1471 if (force || isBound) {
1472 tagWriter.writeStanzaAsync(packet);
1473 } else {
1474 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1475 }
1476 if (packet instanceof AbstractAcknowledgeableStanza) {
1477 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1478
1479 if (this.mStanzaQueue.size() != 0) {
1480 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1481 if (currentHighestKey != stanzasSent) {
1482 throw new AssertionError("Stanza count messed up");
1483 }
1484 }
1485
1486 ++stanzasSent;
1487 this.mStanzaQueue.append(stanzasSent, stanza);
1488 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1489 if (Config.EXTENDED_SM_LOGGING) {
1490 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1491 }
1492 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1493 }
1494 }
1495 }
1496 }
1497
1498 public void sendPing() {
1499 if (!r()) {
1500 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1501 iq.setFrom(account.getJid());
1502 iq.addChild("ping", Namespace.PING);
1503 this.sendIqPacket(iq, null);
1504 }
1505 this.lastPingSent = SystemClock.elapsedRealtime();
1506 }
1507
1508 public void setOnMessagePacketReceivedListener(
1509 final OnMessagePacketReceived listener) {
1510 this.messageListener = listener;
1511 }
1512
1513 public void setOnUnregisteredIqPacketReceivedListener(
1514 final OnIqPacketReceived listener) {
1515 this.unregisteredIqListener = listener;
1516 }
1517
1518 public void setOnPresencePacketReceivedListener(
1519 final OnPresencePacketReceived listener) {
1520 this.presenceListener = listener;
1521 }
1522
1523 public void setOnJinglePacketReceivedListener(
1524 final OnJinglePacketReceived listener) {
1525 this.jingleListener = listener;
1526 }
1527
1528 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1529 this.statusListener = listener;
1530 }
1531
1532 public void setOnBindListener(final OnBindListener listener) {
1533 this.bindListener = listener;
1534 }
1535
1536 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1537 this.acknowledgedListener = listener;
1538 }
1539
1540 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1541 this.advancedStreamFeaturesLoadedListeners.add(listener);
1542 }
1543
1544 private void forceCloseSocket() {
1545 FileBackend.close(this.socket);
1546 FileBackend.close(this.tagReader);
1547 }
1548
1549 public void interrupt() {
1550 if (this.mThread != null) {
1551 this.mThread.interrupt();
1552 }
1553 }
1554
1555 public void disconnect(final boolean force) {
1556 interrupt();
1557 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1558 if (force) {
1559 forceCloseSocket();
1560 } else {
1561 final TagWriter currentTagWriter = this.tagWriter;
1562 if (currentTagWriter.isActive()) {
1563 currentTagWriter.finish();
1564 final Socket currentSocket = this.socket;
1565 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1566 try {
1567 currentTagWriter.await(1, TimeUnit.SECONDS);
1568 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1569 currentTagWriter.writeTag(Tag.end("stream:stream"));
1570 if (streamCountDownLatch != null) {
1571 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1572 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1573 } else {
1574 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1575 }
1576 }
1577 } catch (InterruptedException e) {
1578 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1579 } catch (final IOException e) {
1580 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1581 } finally {
1582 FileBackend.close(currentSocket);
1583 }
1584 } else {
1585 forceCloseSocket();
1586 }
1587 }
1588 }
1589
1590 private void resetStreamId() {
1591 this.streamId = null;
1592 }
1593
1594 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1595 synchronized (this.disco) {
1596 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1597 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1598 if (cursor.getValue().getFeatures().contains(feature)) {
1599 items.add(cursor);
1600 }
1601 }
1602 return items;
1603 }
1604 }
1605
1606 public Jid findDiscoItemByFeature(final String feature) {
1607 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1608 if (items.size() >= 1) {
1609 return items.get(0).getKey();
1610 }
1611 return null;
1612 }
1613
1614 public boolean r() {
1615 if (getFeatures().sm()) {
1616 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1617 return true;
1618 } else {
1619 return false;
1620 }
1621 }
1622
1623 public List<String> getMucServersWithholdAccount() {
1624 List<String> servers = getMucServers();
1625 servers.remove(account.getDomain());
1626 return servers;
1627 }
1628
1629 public List<String> getMucServers() {
1630 List<String> servers = new ArrayList<>();
1631 synchronized (this.disco) {
1632 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1633 final ServiceDiscoveryResult value = cursor.getValue();
1634 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1635 && value.hasIdentity("conference", "text")
1636 && !value.getFeatures().contains("jabber:iq:gateway")
1637 && !value.hasIdentity("conference", "irc")) {
1638 servers.add(cursor.getKey().toString());
1639 }
1640 }
1641 }
1642 return servers;
1643 }
1644
1645 public String getMucServer() {
1646 List<String> servers = getMucServers();
1647 return servers.size() > 0 ? servers.get(0) : null;
1648 }
1649
1650 public int getTimeToNextAttempt() {
1651 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1652 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1653 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1654 return interval - secondsSinceLast;
1655 }
1656
1657 public int getAttempt() {
1658 return this.attempt;
1659 }
1660
1661 public Features getFeatures() {
1662 return this.features;
1663 }
1664
1665 public long getLastSessionEstablished() {
1666 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1667 return System.currentTimeMillis() - diff;
1668 }
1669
1670 public long getLastConnect() {
1671 return this.lastConnect;
1672 }
1673
1674 public long getLastPingSent() {
1675 return this.lastPingSent;
1676 }
1677
1678 public long getLastDiscoStarted() {
1679 return this.lastDiscoStarted;
1680 }
1681
1682 public long getLastPacketReceived() {
1683 return this.lastPacketReceived;
1684 }
1685
1686 public void sendActive() {
1687 this.sendPacket(new ActivePacket());
1688 }
1689
1690 public void sendInactive() {
1691 this.sendPacket(new InactivePacket());
1692 }
1693
1694 public void resetAttemptCount(boolean resetConnectTime) {
1695 this.attempt = 0;
1696 if (resetConnectTime) {
1697 this.lastConnect = 0;
1698 }
1699 }
1700
1701 public void setInteractive(boolean interactive) {
1702 this.mInteractive = interactive;
1703 }
1704
1705 public Identity getServerIdentity() {
1706 synchronized (this.disco) {
1707 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1708 if (result == null) {
1709 return Identity.UNKNOWN;
1710 }
1711 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1712 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1713 switch (id.getName()) {
1714 case "Prosody":
1715 return Identity.PROSODY;
1716 case "ejabberd":
1717 return Identity.EJABBERD;
1718 case "Slack-XMPP":
1719 return Identity.SLACK;
1720 }
1721 }
1722 }
1723 }
1724 return Identity.UNKNOWN;
1725 }
1726
1727 private IqGenerator getIqGenerator() {
1728 return mXmppConnectionService.getIqGenerator();
1729 }
1730
1731 public enum Identity {
1732 FACEBOOK,
1733 SLACK,
1734 EJABBERD,
1735 PROSODY,
1736 NIMBUZZ,
1737 UNKNOWN
1738 }
1739
1740 private static class TlsFactoryVerifier {
1741 private final SSLSocketFactory factory;
1742 private final DomainHostnameVerifier verifier;
1743
1744 TlsFactoryVerifier(final SSLSocketFactory factory, final DomainHostnameVerifier verifier) throws IOException {
1745 this.factory = factory;
1746 this.verifier = verifier;
1747 if (factory == null || verifier == null) {
1748 throw new IOException("could not setup ssl");
1749 }
1750 }
1751 }
1752
1753 private class MyKeyManager implements X509KeyManager {
1754 @Override
1755 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1756 return account.getPrivateKeyAlias();
1757 }
1758
1759 @Override
1760 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1761 return null;
1762 }
1763
1764 @Override
1765 public X509Certificate[] getCertificateChain(String alias) {
1766 Log.d(Config.LOGTAG, "getting certificate chain");
1767 try {
1768 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1769 } catch (Exception e) {
1770 Log.d(Config.LOGTAG, e.getMessage());
1771 return new X509Certificate[0];
1772 }
1773 }
1774
1775 @Override
1776 public String[] getClientAliases(String s, Principal[] principals) {
1777 final String alias = account.getPrivateKeyAlias();
1778 return alias != null ? new String[]{alias} : new String[0];
1779 }
1780
1781 @Override
1782 public String[] getServerAliases(String s, Principal[] principals) {
1783 return new String[0];
1784 }
1785
1786 @Override
1787 public PrivateKey getPrivateKey(String alias) {
1788 try {
1789 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1790 } catch (Exception e) {
1791 return null;
1792 }
1793 }
1794 }
1795
1796 private class StateChangingError extends Error {
1797 private final Account.State state;
1798
1799 public StateChangingError(Account.State state) {
1800 this.state = state;
1801 }
1802 }
1803
1804 private class StateChangingException extends IOException {
1805 private final Account.State state;
1806
1807 public StateChangingException(Account.State state) {
1808 this.state = state;
1809 }
1810 }
1811
1812 public class Features {
1813 XmppConnection connection;
1814 private boolean carbonsEnabled = false;
1815 private boolean encryptionEnabled = false;
1816 private boolean blockListRequested = false;
1817
1818 public Features(final XmppConnection connection) {
1819 this.connection = connection;
1820 }
1821
1822 private boolean hasDiscoFeature(final Jid server, final String feature) {
1823 synchronized (XmppConnection.this.disco) {
1824 return connection.disco.containsKey(server) &&
1825 connection.disco.get(server).getFeatures().contains(feature);
1826 }
1827 }
1828
1829 public boolean carbons() {
1830 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
1831 }
1832
1833 public boolean commands() {
1834 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
1835 }
1836
1837 public boolean easyOnboardingInvites() {
1838 synchronized (commands) {
1839 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
1840 }
1841 }
1842
1843 public boolean bookmarksConversion() {
1844 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1845 }
1846
1847 public boolean avatarConversion() {
1848 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
1849 }
1850
1851 public boolean blocking() {
1852 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
1853 }
1854
1855 public boolean spamReporting() {
1856 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
1857 }
1858
1859 public boolean flexibleOfflineMessageRetrieval() {
1860 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1861 }
1862
1863 public boolean register() {
1864 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
1865 }
1866
1867 public boolean invite() {
1868 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
1869 }
1870
1871 public boolean sm() {
1872 return streamId != null
1873 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1874 }
1875
1876 public boolean csi() {
1877 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1878 }
1879
1880 public boolean pep() {
1881 synchronized (XmppConnection.this.disco) {
1882 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1883 return info != null && info.hasIdentity("pubsub", "pep");
1884 }
1885 }
1886
1887 public boolean pepPersistent() {
1888 synchronized (XmppConnection.this.disco) {
1889 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1890 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1891 }
1892 }
1893
1894 public boolean pepPublishOptions() {
1895 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1896 }
1897
1898 public boolean pepOmemoWhitelisted() {
1899 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1900 }
1901
1902 public boolean mam() {
1903 return MessageArchiveService.Version.has(getAccountFeatures());
1904 }
1905
1906 public List<String> getAccountFeatures() {
1907 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1908 return result == null ? Collections.emptyList() : result.getFeatures();
1909 }
1910
1911 public boolean push() {
1912 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
1913 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
1914 }
1915
1916 public boolean rosterVersioning() {
1917 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1918 }
1919
1920 public void setBlockListRequested(boolean value) {
1921 this.blockListRequested = value;
1922 }
1923
1924 public boolean p1S3FileTransfer() {
1925 return hasDiscoFeature(account.getDomain(), Namespace.P1_S3_FILE_TRANSFER);
1926 }
1927
1928 public boolean httpUpload(long filesize) {
1929 if (Config.DISABLE_HTTP_UPLOAD) {
1930 return false;
1931 } else {
1932 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1933 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1934 if (items.size() > 0) {
1935 try {
1936 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1937 if (filesize <= maxsize) {
1938 return true;
1939 } else {
1940 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
1941 return false;
1942 }
1943 } catch (Exception e) {
1944 return true;
1945 }
1946 }
1947 }
1948 return false;
1949 }
1950 }
1951
1952 public boolean useLegacyHttpUpload() {
1953 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
1954 }
1955
1956 public long getMaxHttpUploadSize() {
1957 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1958 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1959 if (items.size() > 0) {
1960 try {
1961 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1962 } catch (Exception e) {
1963 //ignored
1964 }
1965 }
1966 }
1967 return -1;
1968 }
1969
1970 public boolean stanzaIds() {
1971 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
1972 }
1973
1974 public boolean bookmarks2() {
1975 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
1976 }
1977
1978 public boolean externalServiceDiscovery() {
1979 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
1980 }
1981 }
1982}