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.util.Base64;
9import android.util.Log;
10import android.util.Pair;
11import android.util.SparseArray;
12
13import androidx.annotation.NonNull;
14
15import org.xmlpull.v1.XmlPullParserException;
16
17import java.io.ByteArrayInputStream;
18import java.io.IOException;
19import java.io.InputStream;
20import java.net.ConnectException;
21import java.net.IDN;
22import java.net.InetAddress;
23import java.net.InetSocketAddress;
24import java.net.MalformedURLException;
25import java.net.Socket;
26import java.net.URL;
27import java.net.UnknownHostException;
28import java.security.KeyManagementException;
29import java.security.NoSuchAlgorithmException;
30import java.security.Principal;
31import java.security.PrivateKey;
32import java.security.cert.X509Certificate;
33import java.util.ArrayList;
34import java.util.Arrays;
35import java.util.Collections;
36import java.util.HashMap;
37import java.util.HashSet;
38import java.util.Hashtable;
39import java.util.Iterator;
40import java.util.List;
41import java.util.Map.Entry;
42import java.util.Set;
43import java.util.concurrent.CountDownLatch;
44import java.util.concurrent.TimeUnit;
45import java.util.concurrent.atomic.AtomicBoolean;
46import java.util.concurrent.atomic.AtomicInteger;
47import java.util.regex.Matcher;
48
49import javax.net.ssl.KeyManager;
50import javax.net.ssl.SSLContext;
51import javax.net.ssl.SSLSocket;
52import javax.net.ssl.SSLSocketFactory;
53import javax.net.ssl.X509KeyManager;
54import javax.net.ssl.X509TrustManager;
55
56import eu.siacs.conversations.Config;
57import eu.siacs.conversations.R;
58import eu.siacs.conversations.crypto.DomainHostnameVerifier;
59import eu.siacs.conversations.crypto.XmppDomainVerifier;
60import eu.siacs.conversations.crypto.axolotl.AxolotlService;
61import eu.siacs.conversations.crypto.sasl.Anonymous;
62import eu.siacs.conversations.crypto.sasl.DigestMd5;
63import eu.siacs.conversations.crypto.sasl.External;
64import eu.siacs.conversations.crypto.sasl.Plain;
65import eu.siacs.conversations.crypto.sasl.SaslMechanism;
66import eu.siacs.conversations.crypto.sasl.ScramSha1;
67import eu.siacs.conversations.crypto.sasl.ScramSha256;
68import eu.siacs.conversations.crypto.sasl.ScramSha512;
69import eu.siacs.conversations.entities.Account;
70import eu.siacs.conversations.entities.Message;
71import eu.siacs.conversations.entities.ServiceDiscoveryResult;
72import eu.siacs.conversations.generator.IqGenerator;
73import eu.siacs.conversations.persistance.FileBackend;
74import eu.siacs.conversations.services.MemorizingTrustManager;
75import eu.siacs.conversations.services.MessageArchiveService;
76import eu.siacs.conversations.services.NotificationService;
77import eu.siacs.conversations.services.XmppConnectionService;
78import eu.siacs.conversations.utils.CryptoHelper;
79import eu.siacs.conversations.utils.Patterns;
80import eu.siacs.conversations.utils.Resolver;
81import eu.siacs.conversations.utils.SSLSocketHelper;
82import eu.siacs.conversations.utils.SocksSocketFactory;
83import eu.siacs.conversations.utils.XmlHelper;
84import eu.siacs.conversations.xml.Element;
85import eu.siacs.conversations.xml.LocalizedContent;
86import eu.siacs.conversations.xml.Namespace;
87import eu.siacs.conversations.xml.Tag;
88import eu.siacs.conversations.xml.TagWriter;
89import eu.siacs.conversations.xml.XmlReader;
90import eu.siacs.conversations.xmpp.forms.Data;
91import eu.siacs.conversations.xmpp.forms.Field;
92import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
93import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
94import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
95import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
96import eu.siacs.conversations.xmpp.stanzas.IqPacket;
97import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
98import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
99import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
100import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
101import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
102import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
103import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
104import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
105
106public class XmppConnection implements Runnable {
107
108 private static final int PACKET_IQ = 0;
109 private static final int PACKET_MESSAGE = 1;
110 private static final int PACKET_PRESENCE = 2;
111 public final OnIqPacketReceived registrationResponseListener = (account, 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 protected final Account account;
137 private final Features features = new Features(this);
138 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
139 private final HashMap<String, Jid> commands = new HashMap<>();
140 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
141 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
142 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new HashSet<>();
143 private final XmppConnectionService mXmppConnectionService;
144 private Socket socket;
145 private XmlReader tagReader;
146 private TagWriter tagWriter = new TagWriter();
147 private boolean shouldAuthenticate = true;
148 private boolean inSmacksSession = false;
149 private boolean isBound = false;
150 private Element streamFeatures;
151 private String streamId = null;
152 private int smVersion = 3;
153 private int stanzasReceived = 0;
154 private int stanzasSent = 0;
155 private long lastPacketReceived = 0;
156 private long lastPingSent = 0;
157 private long lastConnect = 0;
158 private long lastSessionStarted = 0;
159 private long lastDiscoStarted = 0;
160 private boolean isMamPreferenceAlways = false;
161 private final AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
162 private final AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
163 private final AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
164 private final AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
165 private boolean mInteractive = false;
166 private int attempt = 0;
167 private OnPresencePacketReceived presenceListener = null;
168 private OnJinglePacketReceived jingleListener = null;
169 private OnIqPacketReceived unregisteredIqListener = null;
170 private OnMessagePacketReceived messageListener = null;
171 private OnStatusChanged statusListener = null;
172 private OnBindListener bindListener = null;
173 private OnMessageAcknowledged acknowledgedListener = null;
174 private SaslMechanism saslMechanism;
175 private URL redirectionUrl = null;
176 private String verifiedHostname = null;
177 private volatile Thread mThread;
178 private CountDownLatch mStreamCountDownLatch;
179
180
181 public XmppConnection(final Account account, final XmppConnectionService service) {
182 this.account = account;
183 this.mXmppConnectionService = service;
184 }
185
186 private static void fixResource(Context context, Account account) {
187 String resource = account.getResource();
188 int fixedPartLength = context.getString(R.string.app_name).length() + 1; //include the trailing dot
189 int randomPartLength = 4; // 3 bytes
190 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
191 if (validBase64(resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
192 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
193 }
194 }
195 }
196
197 private static boolean validBase64(String input) {
198 try {
199 return Base64.decode(input, Base64.URL_SAFE).length == 3;
200 } catch (Throwable throwable) {
201 return false;
202 }
203 }
204
205 private void changeStatus(final Account.State nextStatus) {
206 synchronized (this) {
207 if (Thread.currentThread().isInterrupted()) {
208 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not changing status to " + nextStatus + " because thread was interrupted");
209 return;
210 }
211 if (account.getStatus() != nextStatus) {
212 if ((nextStatus == Account.State.OFFLINE)
213 && (account.getStatus() != Account.State.CONNECTING)
214 && (account.getStatus() != Account.State.ONLINE)
215 && (account.getStatus() != Account.State.DISABLED)) {
216 return;
217 }
218 if (nextStatus == Account.State.ONLINE) {
219 this.attempt = 0;
220 }
221 account.setStatus(nextStatus);
222 } else {
223 return;
224 }
225 }
226 if (statusListener != null) {
227 statusListener.onStatusChanged(account);
228 }
229 }
230
231 public Jid getJidForCommand(final String node) {
232 synchronized (this.commands) {
233 return this.commands.get(node);
234 }
235 }
236
237 public void prepareNewConnection() {
238 this.lastConnect = SystemClock.elapsedRealtime();
239 this.lastPingSent = SystemClock.elapsedRealtime();
240 this.lastDiscoStarted = Long.MAX_VALUE;
241 this.mWaitingForSmCatchup.set(false);
242 this.changeStatus(Account.State.CONNECTING);
243 }
244
245 public boolean isWaitingForSmCatchup() {
246 return mWaitingForSmCatchup.get();
247 }
248
249 public void incrementSmCatchupMessageCounter() {
250 this.mSmCatchupMessageCounter.incrementAndGet();
251 }
252
253 protected void connect() {
254 if (mXmppConnectionService.areMessagesInitialized()) {
255 mXmppConnectionService.resetSendingToWaiting(account);
256 }
257 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
258 features.encryptionEnabled = false;
259 inSmacksSession = false;
260 isBound = false;
261 this.attempt++;
262 this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec
263 try {
264 Socket localSocket;
265 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
266 this.changeStatus(Account.State.CONNECTING);
267 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
268 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
269 if (useTor) {
270 String destination;
271 if (account.getHostname().isEmpty() || account.isOnion()) {
272 destination = account.getServer();
273 } else {
274 destination = account.getHostname();
275 this.verifiedHostname = destination;
276 }
277
278 final int port = account.getPort();
279 final boolean directTls = Resolver.useDirectTls(port);
280
281 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor. directTls=" + directTls);
282 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
283
284 if (directTls) {
285 localSocket = upgradeSocketToTls(localSocket);
286 features.encryptionEnabled = true;
287 }
288
289 try {
290 startXmpp(localSocket);
291 } catch (InterruptedException e) {
292 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
293 return;
294 } catch (Exception e) {
295 throw new IOException(e.getMessage());
296 }
297 } else {
298 final String domain = account.getServer();
299 final List<Resolver.Result> results;
300 final boolean hardcoded = extended && !account.getHostname().isEmpty();
301 if (hardcoded) {
302 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
303 } else {
304 results = Resolver.resolve(domain);
305 }
306 if (Thread.currentThread().isInterrupted()) {
307 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
308 return;
309 }
310 if (results.size() == 0) {
311 Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": Resolver results were empty");
312 return;
313 }
314 final Resolver.Result storedBackupResult;
315 if (hardcoded) {
316 storedBackupResult = null;
317 } else {
318 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
319 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
320 results.add(storedBackupResult);
321 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
322 }
323 }
324 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
325 final Resolver.Result result = iterator.next();
326 if (Thread.currentThread().isInterrupted()) {
327 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
328 return;
329 }
330 try {
331 // if tls is true, encryption is implied and must not be started
332 features.encryptionEnabled = result.isDirectTls();
333 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
334 Log.d(Config.LOGTAG, "verified hostname " + verifiedHostname);
335 final InetSocketAddress addr;
336 if (result.getIp() != null) {
337 addr = new InetSocketAddress(result.getIp(), result.getPort());
338 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
339 + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
340 + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
341 } else {
342 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
343 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
344 + ": using values from resolver "
345 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
346 }
347
348 localSocket = new Socket();
349 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
350
351 if (features.encryptionEnabled) {
352 localSocket = upgradeSocketToTls(localSocket);
353 }
354
355 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
356 if (startXmpp(localSocket)) {
357 localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
358 if (!hardcoded && !result.equals(storedBackupResult)) {
359 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
360 }
361 break; // successfully connected to server that speaks xmpp
362 } else {
363 FileBackend.close(localSocket);
364 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
365 }
366 } catch (final StateChangingException e) {
367 if (!iterator.hasNext()) {
368 throw e;
369 }
370 } catch (InterruptedException e) {
371 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
372 return;
373 } catch (final Throwable e) {
374 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
375 if (!iterator.hasNext()) {
376 throw new UnknownHostException();
377 }
378 }
379 }
380 }
381 processStream();
382 } catch (final SecurityException e) {
383 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
384 } catch (final StateChangingException e) {
385 this.changeStatus(e.state);
386 } catch (final UnknownHostException | ConnectException e) {
387 this.changeStatus(Account.State.SERVER_NOT_FOUND);
388 } catch (final SocksSocketFactory.HostNotFoundException e) {
389 this.changeStatus(Account.State.SERVER_NOT_FOUND);
390 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
391 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
392 } catch (final IOException | XmlPullParserException e) {
393 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
394 this.changeStatus(Account.State.OFFLINE);
395 this.attempt = Math.max(0, this.attempt - 1);
396 } finally {
397 if (!Thread.currentThread().isInterrupted()) {
398 forceCloseSocket();
399 } else {
400 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
401 }
402 }
403 }
404
405 /**
406 * Starts xmpp protocol, call after connecting to socket
407 *
408 * @return true if server returns with valid xmpp, false otherwise
409 */
410 private boolean startXmpp(Socket socket) throws Exception {
411 if (Thread.currentThread().isInterrupted()) {
412 throw new InterruptedException();
413 }
414 this.socket = socket;
415 tagReader = new XmlReader();
416 if (tagWriter != null) {
417 tagWriter.forceClose();
418 }
419 tagWriter = new TagWriter();
420 tagWriter.setOutputStream(socket.getOutputStream());
421 tagReader.setInputStream(socket.getInputStream());
422 tagWriter.beginDocument();
423 sendStartStream();
424 final Tag tag = tagReader.readTag();
425 if (Thread.currentThread().isInterrupted()) {
426 throw new InterruptedException();
427 }
428 if (socket instanceof SSLSocket) {
429 SSLSocketHelper.log(account, (SSLSocket) socket);
430 }
431 return tag != null && tag.isStart("stream");
432 }
433
434 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
435 final SSLContext sc = SSLSocketHelper.getSSLContext();
436 final MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
437 final KeyManager[] keyManager;
438 if (account.getPrivateKeyAlias() != null) {
439 keyManager = new KeyManager[]{new MyKeyManager()};
440 } else {
441 keyManager = null;
442 }
443 final String domain = account.getServer();
444 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
445 final SSLSocketFactory factory = sc.getSocketFactory();
446 final DomainHostnameVerifier verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier(), mInteractive);
447 return new TlsFactoryVerifier(factory, verifier);
448 }
449
450 @Override
451 public void run() {
452 synchronized (this) {
453 this.mThread = Thread.currentThread();
454 if (this.mThread.isInterrupted()) {
455 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
456 return;
457 }
458 forceCloseSocket();
459 }
460 connect();
461 }
462
463 private void processStream() throws XmlPullParserException, IOException {
464 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
465 this.mStreamCountDownLatch = streamCountDownLatch;
466 Tag nextTag = tagReader.readTag();
467 while (nextTag != null && !nextTag.isEnd("stream")) {
468 if (nextTag.isStart("error")) {
469 processStreamError(nextTag);
470 } else if (nextTag.isStart("features")) {
471 processStreamFeatures(nextTag);
472 } else if (nextTag.isStart("proceed")) {
473 switchOverToTls();
474 } else if (nextTag.isStart("success")) {
475 final String challenge = tagReader.readElement(nextTag).getContent();
476 try {
477 saslMechanism.getResponse(challenge);
478 } catch (final SaslMechanism.AuthenticationException e) {
479 Log.e(Config.LOGTAG, String.valueOf(e));
480 throw new StateChangingException(Account.State.UNAUTHORIZED);
481 }
482 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in");
483 account.setKey(Account.PINNED_MECHANISM_KEY,
484 String.valueOf(saslMechanism.getPriority()));
485 tagReader.reset();
486 sendStartStream();
487 final Tag tag = tagReader.readTag();
488 if (tag != null && tag.isStart("stream")) {
489 processStream();
490 } else {
491 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
492 }
493 break;
494 } else if (nextTag.isStart("failure")) {
495 final Element failure = tagReader.readElement(nextTag);
496 if (Namespace.SASL.equals(failure.getNamespace())) {
497 final String text = failure.findChildContent("text");
498 if (failure.hasChild("account-disabled") && text != null) {
499 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
500 if (matcher.find()) {
501 try {
502 URL url = new URL(text.substring(matcher.start(), matcher.end()));
503 if (url.getProtocol().equals("https")) {
504 this.redirectionUrl = url;
505 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
506 }
507 } catch (MalformedURLException e) {
508 throw new StateChangingException(Account.State.UNAUTHORIZED);
509 }
510 }
511 }
512 throw new StateChangingException(Account.State.UNAUTHORIZED);
513 } else if (Namespace.TLS.equals(failure.getNamespace())) {
514 throw new StateChangingException(Account.State.TLS_ERROR);
515 } else {
516 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
517 }
518 } else if (nextTag.isStart("challenge")) {
519 final String challenge = tagReader.readElement(nextTag).getContent();
520 final Element response = new Element("response", Namespace.SASL);
521 try {
522 response.setContent(saslMechanism.getResponse(challenge));
523 } catch (final SaslMechanism.AuthenticationException e) {
524 // TODO: Send auth abort tag.
525 Log.e(Config.LOGTAG, e.toString());
526 }
527 tagWriter.writeElement(response);
528 } else if (nextTag.isStart("enabled")) {
529 final Element enabled = tagReader.readElement(nextTag);
530 if ("true".equals(enabled.getAttribute("resume"))) {
531 this.streamId = enabled.getAttribute("id");
532 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
533 + ": stream management(" + smVersion
534 + ") enabled (resumable)");
535 } else {
536 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
537 + ": stream management(" + smVersion + ") enabled");
538 }
539 this.stanzasReceived = 0;
540 this.inSmacksSession = true;
541 final RequestPacket r = new RequestPacket(smVersion);
542 tagWriter.writeStanzaAsync(r);
543 } else if (nextTag.isStart("resumed")) {
544 this.inSmacksSession = true;
545 this.isBound = true;
546 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
547 lastPacketReceived = SystemClock.elapsedRealtime();
548 final Element resumed = tagReader.readElement(nextTag);
549 final String h = resumed.getAttribute("h");
550 try {
551 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
552 final boolean acknowledgedMessages;
553 synchronized (this.mStanzaQueue) {
554 final int serverCount = Integer.parseInt(h);
555 if (serverCount < stanzasSent) {
556 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
557 + ": session resumed with lost packages");
558 stanzasSent = serverCount;
559 } else {
560 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
561 }
562 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
563 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
564 failedStanzas.add(mStanzaQueue.valueAt(i));
565 }
566 mStanzaQueue.clear();
567 }
568 if (acknowledgedMessages) {
569 mXmppConnectionService.updateConversationUi();
570 }
571 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
572 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
573 if (packet instanceof MessagePacket) {
574 MessagePacket message = (MessagePacket) packet;
575 mXmppConnectionService.markMessage(account,
576 message.getTo().asBareJid(),
577 message.getId(),
578 Message.STATUS_UNSEND);
579 }
580 sendPacket(packet);
581 }
582 } catch (final NumberFormatException ignored) {
583 }
584 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
585 changeStatus(Account.State.ONLINE);
586 } else if (nextTag.isStart("r")) {
587 tagReader.readElement(nextTag);
588 if (Config.EXTENDED_SM_LOGGING) {
589 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
590 }
591 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
592 tagWriter.writeStanzaAsync(ack);
593 } else if (nextTag.isStart("a")) {
594 boolean accountUiNeedsRefresh = false;
595 synchronized (NotificationService.CATCHUP_LOCK) {
596 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
597 final int messageCount = mSmCatchupMessageCounter.get();
598 final int pendingIQs = packetCallbacks.size();
599 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (messages=" + messageCount + ", pending IQs=" + pendingIQs + ")");
600 accountUiNeedsRefresh = true;
601 if (messageCount > 0) {
602 mXmppConnectionService.getNotificationService().finishBacklog(true, account);
603 }
604 }
605 }
606 if (accountUiNeedsRefresh) {
607 mXmppConnectionService.updateAccountUi();
608 }
609 final Element ack = tagReader.readElement(nextTag);
610 lastPacketReceived = SystemClock.elapsedRealtime();
611 try {
612 final boolean acknowledgedMessages;
613 synchronized (this.mStanzaQueue) {
614 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
615 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
616 }
617 if (acknowledgedMessages) {
618 mXmppConnectionService.updateConversationUi();
619 }
620 } catch (NumberFormatException | NullPointerException e) {
621 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
622 }
623 } else if (nextTag.isStart("failed")) {
624 Element failed = tagReader.readElement(nextTag);
625 try {
626 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
627 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
628 final boolean acknowledgedMessages;
629 synchronized (this.mStanzaQueue) {
630 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
631 }
632 if (acknowledgedMessages) {
633 mXmppConnectionService.updateConversationUi();
634 }
635 } catch (NumberFormatException | NullPointerException e) {
636 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
637 }
638 resetStreamId();
639 sendBindRequest();
640 } else if (nextTag.isStart("iq")) {
641 processIq(nextTag);
642 } else if (nextTag.isStart("message")) {
643 processMessage(nextTag);
644 } else if (nextTag.isStart("presence")) {
645 processPresence(nextTag);
646 }
647 nextTag = tagReader.readTag();
648 }
649 if (nextTag != null && nextTag.isEnd("stream")) {
650 streamCountDownLatch.countDown();
651 }
652 }
653
654 private boolean acknowledgeStanzaUpTo(int serverCount) {
655 if (serverCount > stanzasSent) {
656 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
657 }
658 boolean acknowledgedMessages = false;
659 for (int i = 0; i < mStanzaQueue.size(); ++i) {
660 if (serverCount >= mStanzaQueue.keyAt(i)) {
661 if (Config.EXTENDED_SM_LOGGING) {
662 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
663 }
664 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
665 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
666 MessagePacket packet = (MessagePacket) stanza;
667 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, packet.getId());
668 }
669 mStanzaQueue.removeAt(i);
670 i--;
671 }
672 }
673 return acknowledgedMessages;
674 }
675
676 private @NonNull
677 Element processPacket(final Tag currentTag, final int packetType) throws IOException {
678 final Element element;
679 switch (packetType) {
680 case PACKET_IQ:
681 element = new IqPacket();
682 break;
683 case PACKET_MESSAGE:
684 element = new MessagePacket();
685 break;
686 case PACKET_PRESENCE:
687 element = new PresencePacket();
688 break;
689 default:
690 throw new AssertionError("Should never encounter invalid type");
691 }
692 element.setAttributes(currentTag.getAttributes());
693 Tag nextTag = tagReader.readTag();
694 if (nextTag == null) {
695 throw new IOException("interrupted mid tag");
696 }
697 while (!nextTag.isEnd(element.getName())) {
698 if (!nextTag.isNo()) {
699 element.addChild(tagReader.readElement(nextTag));
700 }
701 nextTag = tagReader.readTag();
702 if (nextTag == null) {
703 throw new IOException("interrupted mid tag");
704 }
705 }
706 if (stanzasReceived == Integer.MAX_VALUE) {
707 resetStreamId();
708 throw new IOException("time to restart the session. cant handle >2 billion pcks");
709 }
710 if (inSmacksSession) {
711 ++stanzasReceived;
712 } else if (features.sm()) {
713 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
714 }
715 lastPacketReceived = SystemClock.elapsedRealtime();
716 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
717 Log.d(Config.LOGTAG, "[background stanza] " + element);
718 }
719 if (element instanceof IqPacket
720 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
721 && element.hasChild("jingle", Namespace.JINGLE)) {
722 return JinglePacket.upgrade((IqPacket) element);
723 } else {
724 return element;
725 }
726 }
727
728 private void processIq(final Tag currentTag) throws IOException {
729 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
730 if (!packet.valid()) {
731 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
732 return;
733 }
734 if (packet instanceof JinglePacket) {
735 if (this.jingleListener != null) {
736 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
737 }
738 } else {
739 OnIqPacketReceived callback = null;
740 synchronized (this.packetCallbacks) {
741 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
742 if (packetCallbackDuple != null) {
743 // Packets to the server should have responses from the server
744 if (packetCallbackDuple.first.toServer(account)) {
745 if (packet.fromServer(account)) {
746 callback = packetCallbackDuple.second;
747 packetCallbacks.remove(packet.getId());
748 } else {
749 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
750 }
751 } else {
752 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
753 callback = packetCallbackDuple.second;
754 packetCallbacks.remove(packet.getId());
755 } else {
756 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
757 }
758 }
759 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
760 callback = this.unregisteredIqListener;
761 }
762 }
763 if (callback != null) {
764 try {
765 callback.onIqPacketReceived(account, packet);
766 } catch (StateChangingError error) {
767 throw new StateChangingException(error.state);
768 }
769 }
770 }
771 }
772
773 private void processMessage(final Tag currentTag) throws IOException {
774 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
775 if (!packet.valid()) {
776 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
777 return;
778 }
779 this.messageListener.onMessagePacketReceived(account, packet);
780 }
781
782 private void processPresence(final Tag currentTag) throws IOException {
783 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
784 if (!packet.valid()) {
785 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
786 return;
787 }
788 this.presenceListener.onPresencePacketReceived(account, packet);
789 }
790
791 private void sendStartTLS() throws IOException {
792 final Tag startTLS = Tag.empty("starttls");
793 startTLS.setAttribute("xmlns", Namespace.TLS);
794 tagWriter.writeTag(startTLS);
795 }
796
797 private void switchOverToTls() throws XmlPullParserException, IOException {
798 tagReader.readTag();
799 final Socket socket = this.socket;
800 final SSLSocket sslSocket = upgradeSocketToTls(socket);
801 tagReader.setInputStream(sslSocket.getInputStream());
802 tagWriter.setOutputStream(sslSocket.getOutputStream());
803 sendStartStream();
804 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
805 features.encryptionEnabled = true;
806 final Tag tag = tagReader.readTag();
807 if (tag != null && tag.isStart("stream")) {
808 SSLSocketHelper.log(account, sslSocket);
809 processStream();
810 } else {
811 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
812 }
813 sslSocket.close();
814 }
815
816 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
817 final TlsFactoryVerifier tlsFactoryVerifier;
818 try {
819 tlsFactoryVerifier = getTlsFactoryVerifier();
820 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
821 throw new StateChangingException(Account.State.TLS_ERROR);
822 }
823 final InetAddress address = socket.getInetAddress();
824 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
825 SSLSocketHelper.setSecurity(sslSocket);
826 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
827 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
828 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
829 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
830 FileBackend.close(sslSocket);
831 throw new StateChangingException(Account.State.TLS_ERROR);
832 }
833 return sslSocket;
834 }
835
836 private void processStreamFeatures(final Tag currentTag) throws IOException {
837 this.streamFeatures = tagReader.readElement(currentTag);
838 final boolean isSecure = features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
839 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
840 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
841 sendStartTLS();
842 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
843 if (isSecure) {
844 register();
845 } else {
846 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find STARTTLS for registration process " + XmlHelper.printElementNames(this.streamFeatures));
847 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
848 }
849 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
850 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
851 } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && isSecure) {
852 authenticate();
853 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
854 if (Config.EXTENDED_SM_LOGGING) {
855 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resuming after stanza #" + stanzasReceived);
856 }
857 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
858 this.mSmCatchupMessageCounter.set(0);
859 this.mWaitingForSmCatchup.set(true);
860 this.tagWriter.writeStanzaAsync(resume);
861 } else if (needsBinding) {
862 if (this.streamFeatures.hasChild("bind") && isSecure) {
863 sendBindRequest();
864 } else {
865 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find bind feature " + XmlHelper.printElementNames(this.streamFeatures));
866 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
867 }
868 }
869 }
870
871 private void authenticate() throws IOException {
872 final List<String> mechanisms = extractMechanisms(streamFeatures.findChild("mechanisms"));
873 final Element auth = new Element("auth", Namespace.SASL);
874 if (mechanisms.contains(External.MECHANISM) && account.getPrivateKeyAlias() != null) {
875 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
876 } else if (mechanisms.contains(ScramSha512.MECHANISM)) {
877 saslMechanism = new ScramSha512(tagWriter, account, mXmppConnectionService.getRNG());
878 } else if (mechanisms.contains(ScramSha256.MECHANISM)) {
879 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
880 } else if (mechanisms.contains(ScramSha1.MECHANISM)) {
881 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
882 } else if (mechanisms.contains(Plain.MECHANISM) && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
883 saslMechanism = new Plain(tagWriter, account);
884 } else if (mechanisms.contains(DigestMd5.MECHANISM)) {
885 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
886 } else if (mechanisms.contains(Anonymous.MECHANISM)) {
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 final HashSet<Jid> items = new HashSet<>();
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, (account, packet) -> {
1356 if (!packet.hasChild("error")) {
1357 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1358 + ": successfully enabled carbons");
1359 features.carbonsEnabled = true;
1360 } else {
1361 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1362 + ": error enableing carbons " + packet.toString());
1363 }
1364 });
1365 }
1366
1367 private void processStreamError(final Tag currentTag) throws IOException {
1368 final Element streamError = tagReader.readElement(currentTag);
1369 if (streamError == null) {
1370 return;
1371 }
1372 if (streamError.hasChild("conflict")) {
1373 account.setResource(createNewResource());
1374 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1375 throw new IOException();
1376 } else if (streamError.hasChild("host-unknown")) {
1377 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1378 } else if (streamError.hasChild("policy-violation")) {
1379 this.lastConnect = SystemClock.elapsedRealtime();
1380 final String text = streamError.findChildContent("text");
1381 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1382 failPendingMessages(text);
1383 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1384 } else {
1385 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString());
1386 throw new StateChangingException(Account.State.STREAM_ERROR);
1387 }
1388 }
1389
1390 private void failPendingMessages(final String error) {
1391 synchronized (this.mStanzaQueue) {
1392 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1393 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1394 if (stanza instanceof MessagePacket) {
1395 final MessagePacket packet = (MessagePacket) stanza;
1396 final String id = packet.getId();
1397 final Jid to = packet.getTo();
1398 mXmppConnectionService.markMessage(account,
1399 to.asBareJid(),
1400 id,
1401 Message.STATUS_SEND_FAILED,
1402 error);
1403 }
1404 }
1405 }
1406 }
1407
1408 private void sendStartStream() throws IOException {
1409 final Tag stream = Tag.start("stream:stream");
1410 stream.setAttribute("to", account.getServer());
1411 stream.setAttribute("version", "1.0");
1412 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1413 stream.setAttribute("xmlns", "jabber:client");
1414 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1415 tagWriter.writeTag(stream);
1416 }
1417
1418 private String createNewResource() {
1419 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1420 }
1421
1422 private String nextRandomId() {
1423 return nextRandomId(false);
1424 }
1425
1426 private String nextRandomId(boolean s) {
1427 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1428 }
1429
1430 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1431 packet.setFrom(account.getJid());
1432 return this.sendUnmodifiedIqPacket(packet, callback, false);
1433 }
1434
1435 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1436 if (packet.getId() == null) {
1437 packet.setAttribute("id", nextRandomId());
1438 }
1439 if (callback != null) {
1440 synchronized (this.packetCallbacks) {
1441 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1442 }
1443 }
1444 this.sendPacket(packet, force);
1445 return packet.getId();
1446 }
1447
1448 public void sendMessagePacket(final MessagePacket packet) {
1449 this.sendPacket(packet);
1450 }
1451
1452 public void sendPresencePacket(final PresencePacket packet) {
1453 this.sendPacket(packet);
1454 }
1455
1456 private synchronized void sendPacket(final AbstractStanza packet) {
1457 sendPacket(packet, false);
1458 }
1459
1460 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1461 if (stanzasSent == Integer.MAX_VALUE) {
1462 resetStreamId();
1463 disconnect(true);
1464 return;
1465 }
1466 synchronized (this.mStanzaQueue) {
1467 if (force || isBound) {
1468 tagWriter.writeStanzaAsync(packet);
1469 } else {
1470 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1471 }
1472 if (packet instanceof AbstractAcknowledgeableStanza) {
1473 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1474
1475 if (this.mStanzaQueue.size() != 0) {
1476 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1477 if (currentHighestKey != stanzasSent) {
1478 throw new AssertionError("Stanza count messed up");
1479 }
1480 }
1481
1482 ++stanzasSent;
1483 this.mStanzaQueue.append(stanzasSent, stanza);
1484 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1485 if (Config.EXTENDED_SM_LOGGING) {
1486 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1487 }
1488 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1489 }
1490 }
1491 }
1492 }
1493
1494 public void sendPing() {
1495 if (!r()) {
1496 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1497 iq.setFrom(account.getJid());
1498 iq.addChild("ping", Namespace.PING);
1499 this.sendIqPacket(iq, null);
1500 }
1501 this.lastPingSent = SystemClock.elapsedRealtime();
1502 }
1503
1504 public void setOnMessagePacketReceivedListener(
1505 final OnMessagePacketReceived listener) {
1506 this.messageListener = listener;
1507 }
1508
1509 public void setOnUnregisteredIqPacketReceivedListener(
1510 final OnIqPacketReceived listener) {
1511 this.unregisteredIqListener = listener;
1512 }
1513
1514 public void setOnPresencePacketReceivedListener(
1515 final OnPresencePacketReceived listener) {
1516 this.presenceListener = listener;
1517 }
1518
1519 public void setOnJinglePacketReceivedListener(
1520 final OnJinglePacketReceived listener) {
1521 this.jingleListener = listener;
1522 }
1523
1524 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1525 this.statusListener = listener;
1526 }
1527
1528 public void setOnBindListener(final OnBindListener listener) {
1529 this.bindListener = listener;
1530 }
1531
1532 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1533 this.acknowledgedListener = listener;
1534 }
1535
1536 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1537 this.advancedStreamFeaturesLoadedListeners.add(listener);
1538 }
1539
1540 private void forceCloseSocket() {
1541 FileBackend.close(this.socket);
1542 FileBackend.close(this.tagReader);
1543 }
1544
1545 public void interrupt() {
1546 if (this.mThread != null) {
1547 this.mThread.interrupt();
1548 }
1549 }
1550
1551 public void disconnect(final boolean force) {
1552 interrupt();
1553 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1554 if (force) {
1555 forceCloseSocket();
1556 } else {
1557 final TagWriter currentTagWriter = this.tagWriter;
1558 if (currentTagWriter.isActive()) {
1559 currentTagWriter.finish();
1560 final Socket currentSocket = this.socket;
1561 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1562 try {
1563 currentTagWriter.await(1, TimeUnit.SECONDS);
1564 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1565 currentTagWriter.writeTag(Tag.end("stream:stream"));
1566 if (streamCountDownLatch != null) {
1567 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1568 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1569 } else {
1570 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1571 }
1572 }
1573 } catch (InterruptedException e) {
1574 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1575 } catch (final IOException e) {
1576 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1577 } finally {
1578 FileBackend.close(currentSocket);
1579 }
1580 } else {
1581 forceCloseSocket();
1582 }
1583 }
1584 }
1585
1586 private void resetStreamId() {
1587 this.streamId = null;
1588 }
1589
1590 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1591 synchronized (this.disco) {
1592 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1593 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1594 if (cursor.getValue().getFeatures().contains(feature)) {
1595 items.add(cursor);
1596 }
1597 }
1598 return items;
1599 }
1600 }
1601
1602 public Jid findDiscoItemByFeature(final String feature) {
1603 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1604 if (items.size() >= 1) {
1605 return items.get(0).getKey();
1606 }
1607 return null;
1608 }
1609
1610 public boolean r() {
1611 if (getFeatures().sm()) {
1612 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1613 return true;
1614 } else {
1615 return false;
1616 }
1617 }
1618
1619 public List<String> getMucServersWithholdAccount() {
1620 final List<String> servers = getMucServers();
1621 servers.remove(account.getDomain().toEscapedString());
1622 return servers;
1623 }
1624
1625 public List<String> getMucServers() {
1626 List<String> servers = new ArrayList<>();
1627 synchronized (this.disco) {
1628 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1629 final ServiceDiscoveryResult value = cursor.getValue();
1630 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1631 && value.hasIdentity("conference", "text")
1632 && !value.getFeatures().contains("jabber:iq:gateway")
1633 && !value.hasIdentity("conference", "irc")) {
1634 servers.add(cursor.getKey().toString());
1635 }
1636 }
1637 }
1638 return servers;
1639 }
1640
1641 public String getMucServer() {
1642 List<String> servers = getMucServers();
1643 return servers.size() > 0 ? servers.get(0) : null;
1644 }
1645
1646 public int getTimeToNextAttempt() {
1647 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1648 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1649 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1650 return interval - secondsSinceLast;
1651 }
1652
1653 public int getAttempt() {
1654 return this.attempt;
1655 }
1656
1657 public Features getFeatures() {
1658 return this.features;
1659 }
1660
1661 public long getLastSessionEstablished() {
1662 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1663 return System.currentTimeMillis() - diff;
1664 }
1665
1666 public long getLastConnect() {
1667 return this.lastConnect;
1668 }
1669
1670 public long getLastPingSent() {
1671 return this.lastPingSent;
1672 }
1673
1674 public long getLastDiscoStarted() {
1675 return this.lastDiscoStarted;
1676 }
1677
1678 public long getLastPacketReceived() {
1679 return this.lastPacketReceived;
1680 }
1681
1682 public void sendActive() {
1683 this.sendPacket(new ActivePacket());
1684 }
1685
1686 public void sendInactive() {
1687 this.sendPacket(new InactivePacket());
1688 }
1689
1690 public void resetAttemptCount(boolean resetConnectTime) {
1691 this.attempt = 0;
1692 if (resetConnectTime) {
1693 this.lastConnect = 0;
1694 }
1695 }
1696
1697 public void setInteractive(boolean interactive) {
1698 this.mInteractive = interactive;
1699 }
1700
1701 public Identity getServerIdentity() {
1702 synchronized (this.disco) {
1703 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1704 if (result == null) {
1705 return Identity.UNKNOWN;
1706 }
1707 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1708 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1709 switch (id.getName()) {
1710 case "Prosody":
1711 return Identity.PROSODY;
1712 case "ejabberd":
1713 return Identity.EJABBERD;
1714 case "Slack-XMPP":
1715 return Identity.SLACK;
1716 }
1717 }
1718 }
1719 }
1720 return Identity.UNKNOWN;
1721 }
1722
1723 private IqGenerator getIqGenerator() {
1724 return mXmppConnectionService.getIqGenerator();
1725 }
1726
1727 public enum Identity {
1728 FACEBOOK,
1729 SLACK,
1730 EJABBERD,
1731 PROSODY,
1732 NIMBUZZ,
1733 UNKNOWN
1734 }
1735
1736 private static class TlsFactoryVerifier {
1737 private final SSLSocketFactory factory;
1738 private final DomainHostnameVerifier verifier;
1739
1740 TlsFactoryVerifier(final SSLSocketFactory factory, final DomainHostnameVerifier verifier) throws IOException {
1741 this.factory = factory;
1742 this.verifier = verifier;
1743 if (factory == null || verifier == null) {
1744 throw new IOException("could not setup ssl");
1745 }
1746 }
1747 }
1748
1749 private class MyKeyManager implements X509KeyManager {
1750 @Override
1751 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1752 return account.getPrivateKeyAlias();
1753 }
1754
1755 @Override
1756 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1757 return null;
1758 }
1759
1760 @Override
1761 public X509Certificate[] getCertificateChain(String alias) {
1762 Log.d(Config.LOGTAG, "getting certificate chain");
1763 try {
1764 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1765 } catch (Exception e) {
1766 Log.d(Config.LOGTAG, e.getMessage());
1767 return new X509Certificate[0];
1768 }
1769 }
1770
1771 @Override
1772 public String[] getClientAliases(String s, Principal[] principals) {
1773 final String alias = account.getPrivateKeyAlias();
1774 return alias != null ? new String[]{alias} : new String[0];
1775 }
1776
1777 @Override
1778 public String[] getServerAliases(String s, Principal[] principals) {
1779 return new String[0];
1780 }
1781
1782 @Override
1783 public PrivateKey getPrivateKey(String alias) {
1784 try {
1785 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1786 } catch (Exception e) {
1787 return null;
1788 }
1789 }
1790 }
1791
1792 private static class StateChangingError extends Error {
1793 private final Account.State state;
1794
1795 public StateChangingError(Account.State state) {
1796 this.state = state;
1797 }
1798 }
1799
1800 private static class StateChangingException extends IOException {
1801 private final Account.State state;
1802
1803 public StateChangingException(Account.State state) {
1804 this.state = state;
1805 }
1806 }
1807
1808 public class Features {
1809 XmppConnection connection;
1810 private boolean carbonsEnabled = false;
1811 private boolean encryptionEnabled = false;
1812 private boolean blockListRequested = false;
1813
1814 public Features(final XmppConnection connection) {
1815 this.connection = connection;
1816 }
1817
1818 private boolean hasDiscoFeature(final Jid server, final String feature) {
1819 synchronized (XmppConnection.this.disco) {
1820 return connection.disco.containsKey(server) &&
1821 connection.disco.get(server).getFeatures().contains(feature);
1822 }
1823 }
1824
1825 public boolean carbons() {
1826 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
1827 }
1828
1829 public boolean commands() {
1830 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
1831 }
1832
1833 public boolean easyOnboardingInvites() {
1834 synchronized (commands) {
1835 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
1836 }
1837 }
1838
1839 public boolean bookmarksConversion() {
1840 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1841 }
1842
1843 public boolean avatarConversion() {
1844 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
1845 }
1846
1847 public boolean blocking() {
1848 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
1849 }
1850
1851 public boolean spamReporting() {
1852 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
1853 }
1854
1855 public boolean flexibleOfflineMessageRetrieval() {
1856 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1857 }
1858
1859 public boolean register() {
1860 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
1861 }
1862
1863 public boolean invite() {
1864 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
1865 }
1866
1867 public boolean sm() {
1868 return streamId != null
1869 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1870 }
1871
1872 public boolean csi() {
1873 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1874 }
1875
1876 public boolean pep() {
1877 synchronized (XmppConnection.this.disco) {
1878 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1879 return info != null && info.hasIdentity("pubsub", "pep");
1880 }
1881 }
1882
1883 public boolean pepPersistent() {
1884 synchronized (XmppConnection.this.disco) {
1885 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1886 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1887 }
1888 }
1889
1890 public boolean pepPublishOptions() {
1891 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1892 }
1893
1894 public boolean pepOmemoWhitelisted() {
1895 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1896 }
1897
1898 public boolean mam() {
1899 return MessageArchiveService.Version.has(getAccountFeatures());
1900 }
1901
1902 public List<String> getAccountFeatures() {
1903 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1904 return result == null ? Collections.emptyList() : result.getFeatures();
1905 }
1906
1907 public boolean push() {
1908 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
1909 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
1910 }
1911
1912 public boolean rosterVersioning() {
1913 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1914 }
1915
1916 public void setBlockListRequested(boolean value) {
1917 this.blockListRequested = value;
1918 }
1919
1920 public boolean p1S3FileTransfer() {
1921 return hasDiscoFeature(account.getDomain(), Namespace.P1_S3_FILE_TRANSFER);
1922 }
1923
1924 public boolean httpUpload(long filesize) {
1925 if (Config.DISABLE_HTTP_UPLOAD) {
1926 return false;
1927 } else {
1928 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1929 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1930 if (items.size() > 0) {
1931 try {
1932 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1933 if (filesize <= maxsize) {
1934 return true;
1935 } else {
1936 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
1937 return false;
1938 }
1939 } catch (Exception e) {
1940 return true;
1941 }
1942 }
1943 }
1944 return false;
1945 }
1946 }
1947
1948 public boolean useLegacyHttpUpload() {
1949 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
1950 }
1951
1952 public long getMaxHttpUploadSize() {
1953 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1954 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1955 if (items.size() > 0) {
1956 try {
1957 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1958 } catch (Exception e) {
1959 //ignored
1960 }
1961 }
1962 }
1963 return -1;
1964 }
1965
1966 public boolean stanzaIds() {
1967 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
1968 }
1969
1970 public boolean bookmarks2() {
1971 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
1972 }
1973
1974 public boolean externalServiceDiscovery() {
1975 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
1976 }
1977 }
1978}