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.Socket;
25import java.net.UnknownHostException;
26import java.security.KeyManagementException;
27import java.security.NoSuchAlgorithmException;
28import java.security.Principal;
29import java.security.PrivateKey;
30import java.security.cert.X509Certificate;
31import java.util.ArrayList;
32import java.util.Arrays;
33import java.util.Collections;
34import java.util.HashMap;
35import java.util.HashSet;
36import java.util.Hashtable;
37import java.util.Iterator;
38import java.util.List;
39import java.util.Map.Entry;
40import java.util.Set;
41import java.util.concurrent.CountDownLatch;
42import java.util.concurrent.TimeUnit;
43import java.util.concurrent.atomic.AtomicBoolean;
44import java.util.concurrent.atomic.AtomicInteger;
45import java.util.regex.Matcher;
46
47import javax.net.ssl.KeyManager;
48import javax.net.ssl.SSLContext;
49import javax.net.ssl.SSLPeerUnverifiedException;
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.XmppDomainVerifier;
58import eu.siacs.conversations.crypto.axolotl.AxolotlService;
59import eu.siacs.conversations.crypto.sasl.Anonymous;
60import eu.siacs.conversations.crypto.sasl.DigestMd5;
61import eu.siacs.conversations.crypto.sasl.External;
62import eu.siacs.conversations.crypto.sasl.Plain;
63import eu.siacs.conversations.crypto.sasl.SaslMechanism;
64import eu.siacs.conversations.crypto.sasl.ScramSha1;
65import eu.siacs.conversations.crypto.sasl.ScramSha256;
66import eu.siacs.conversations.crypto.sasl.ScramSha512;
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.http.HttpConnectionManager;
72import eu.siacs.conversations.persistance.FileBackend;
73import eu.siacs.conversations.services.MemorizingTrustManager;
74import eu.siacs.conversations.services.MessageArchiveService;
75import eu.siacs.conversations.services.NotificationService;
76import eu.siacs.conversations.services.XmppConnectionService;
77import eu.siacs.conversations.utils.CryptoHelper;
78import eu.siacs.conversations.utils.Patterns;
79import eu.siacs.conversations.utils.Resolver;
80import eu.siacs.conversations.utils.SSLSocketHelper;
81import eu.siacs.conversations.utils.SocksSocketFactory;
82import eu.siacs.conversations.utils.XmlHelper;
83import eu.siacs.conversations.xml.Element;
84import eu.siacs.conversations.xml.LocalizedContent;
85import eu.siacs.conversations.xml.Namespace;
86import eu.siacs.conversations.xml.Tag;
87import eu.siacs.conversations.xml.TagWriter;
88import eu.siacs.conversations.xml.XmlReader;
89import eu.siacs.conversations.xmpp.forms.Data;
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;
103import okhttp3.HttpUrl;
104
105public class XmppConnection implements Runnable {
106
107 private static final int PACKET_IQ = 0;
108 private static final int PACKET_MESSAGE = 1;
109 private static final int PACKET_PRESENCE = 2;
110 public final OnIqPacketReceived registrationResponseListener = (account, packet) -> {
111 if (packet.getType() == IqPacket.TYPE.RESULT) {
112 account.setOption(Account.OPTION_REGISTER, false);
113 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": successfully registered new account on server");
114 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
115 } else {
116 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
117 "The password is too weak",
118 "Please use a longer password.");
119 Element error = packet.findChild("error");
120 Account.State state = Account.State.REGISTRATION_FAILED;
121 if (error != null) {
122 if (error.hasChild("conflict")) {
123 state = Account.State.REGISTRATION_CONFLICT;
124 } else if (error.hasChild("resource-constraint")
125 && "wait".equals(error.getAttribute("type"))) {
126 state = Account.State.REGISTRATION_PLEASE_WAIT;
127 } else if (error.hasChild("not-acceptable")
128 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
129 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
130 }
131 }
132 throw new StateChangingError(state);
133 }
134 };
135 protected final Account account;
136 private final Features features = new Features(this);
137 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
138 private final HashMap<String, Jid> commands = new HashMap<>();
139 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
140 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
141 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new HashSet<>();
142 private final XmppConnectionService mXmppConnectionService;
143 private Socket socket;
144 private XmlReader tagReader;
145 private TagWriter tagWriter = new TagWriter();
146 private boolean shouldAuthenticate = true;
147 private boolean inSmacksSession = false;
148 private boolean isBound = false;
149 private Element streamFeatures;
150 private String streamId = null;
151 private int smVersion = 3;
152 private int stanzasReceived = 0;
153 private int stanzasSent = 0;
154 private long lastPacketReceived = 0;
155 private long lastPingSent = 0;
156 private long lastConnect = 0;
157 private long lastSessionStarted = 0;
158 private long lastDiscoStarted = 0;
159 private boolean isMamPreferenceAlways = false;
160 private final AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
161 private final AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
162 private final AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
163 private final AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
164 private boolean mInteractive = false;
165 private int attempt = 0;
166 private OnPresencePacketReceived presenceListener = null;
167 private OnJinglePacketReceived jingleListener = null;
168 private OnIqPacketReceived unregisteredIqListener = null;
169 private OnMessagePacketReceived messageListener = null;
170 private OnStatusChanged statusListener = null;
171 private OnBindListener bindListener = null;
172 private OnMessageAcknowledged acknowledgedListener = null;
173 private SaslMechanism saslMechanism;
174 private HttpUrl redirectionUrl = null;
175 private String verifiedHostname = null;
176 private volatile Thread mThread;
177 private CountDownLatch mStreamCountDownLatch;
178
179
180 public XmppConnection(final Account account, final XmppConnectionService service) {
181 this.account = account;
182 this.mXmppConnectionService = service;
183 }
184
185 private static void fixResource(Context context, Account account) {
186 String resource = account.getResource();
187 int fixedPartLength = context.getString(R.string.app_name).length() + 1; //include the trailing dot
188 int randomPartLength = 4; // 3 bytes
189 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
190 if (validBase64(resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
191 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
192 }
193 }
194 }
195
196 private static boolean validBase64(String input) {
197 try {
198 return Base64.decode(input, Base64.URL_SAFE).length == 3;
199 } catch (Throwable throwable) {
200 return false;
201 }
202 }
203
204 private void changeStatus(final Account.State nextStatus) {
205 synchronized (this) {
206 if (Thread.currentThread().isInterrupted()) {
207 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not changing status to " + nextStatus + " because thread was interrupted");
208 return;
209 }
210 if (account.getStatus() != nextStatus) {
211 if ((nextStatus == Account.State.OFFLINE)
212 && (account.getStatus() != Account.State.CONNECTING)
213 && (account.getStatus() != Account.State.ONLINE)
214 && (account.getStatus() != Account.State.DISABLED)) {
215 return;
216 }
217 if (nextStatus == Account.State.ONLINE) {
218 this.attempt = 0;
219 }
220 account.setStatus(nextStatus);
221 } else {
222 return;
223 }
224 }
225 if (statusListener != null) {
226 statusListener.onStatusChanged(account);
227 }
228 }
229
230 public Jid getJidForCommand(final String node) {
231 synchronized (this.commands) {
232 return this.commands.get(node);
233 }
234 }
235
236 public void prepareNewConnection() {
237 this.lastConnect = SystemClock.elapsedRealtime();
238 this.lastPingSent = SystemClock.elapsedRealtime();
239 this.lastDiscoStarted = Long.MAX_VALUE;
240 this.mWaitingForSmCatchup.set(false);
241 this.changeStatus(Account.State.CONNECTING);
242 }
243
244 public boolean isWaitingForSmCatchup() {
245 return mWaitingForSmCatchup.get();
246 }
247
248 public void incrementSmCatchupMessageCounter() {
249 this.mSmCatchupMessageCounter.incrementAndGet();
250 }
251
252 protected void connect() {
253 if (mXmppConnectionService.areMessagesInitialized()) {
254 mXmppConnectionService.resetSendingToWaiting(account);
255 }
256 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
257 features.encryptionEnabled = false;
258 inSmacksSession = false;
259 isBound = false;
260 this.attempt++;
261 this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec
262 try {
263 Socket localSocket;
264 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
265 this.changeStatus(Account.State.CONNECTING);
266 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
267 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
268 if (useTor) {
269 String destination;
270 if (account.getHostname().isEmpty() || account.isOnion()) {
271 destination = account.getServer();
272 } else {
273 destination = account.getHostname();
274 this.verifiedHostname = destination;
275 }
276
277 final int port = account.getPort();
278 final boolean directTls = Resolver.useDirectTls(port);
279
280 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor. directTls=" + directTls);
281 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
282
283 if (directTls) {
284 localSocket = upgradeSocketToTls(localSocket);
285 features.encryptionEnabled = true;
286 }
287
288 try {
289 startXmpp(localSocket);
290 } catch (InterruptedException e) {
291 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
292 return;
293 } catch (Exception e) {
294 throw new IOException(e.getMessage());
295 }
296 } else {
297 final String domain = account.getServer();
298 final List<Resolver.Result> results;
299 final boolean hardcoded = extended && !account.getHostname().isEmpty();
300 if (hardcoded) {
301 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
302 } else {
303 results = Resolver.resolve(domain);
304 }
305 if (Thread.currentThread().isInterrupted()) {
306 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
307 return;
308 }
309 if (results.size() == 0) {
310 Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": Resolver results were empty");
311 return;
312 }
313 final Resolver.Result storedBackupResult;
314 if (hardcoded) {
315 storedBackupResult = null;
316 } else {
317 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
318 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
319 results.add(storedBackupResult);
320 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
321 }
322 }
323 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
324 final Resolver.Result result = iterator.next();
325 if (Thread.currentThread().isInterrupted()) {
326 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
327 return;
328 }
329 try {
330 // if tls is true, encryption is implied and must not be started
331 features.encryptionEnabled = result.isDirectTls();
332 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
333 Log.d(Config.LOGTAG, "verified hostname " + verifiedHostname);
334 final InetSocketAddress addr;
335 if (result.getIp() != null) {
336 addr = new InetSocketAddress(result.getIp(), result.getPort());
337 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
338 + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
339 + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
340 } else {
341 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
342 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
343 + ": using values from resolver "
344 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
345 }
346
347 localSocket = new Socket();
348 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
349
350 if (features.encryptionEnabled) {
351 localSocket = upgradeSocketToTls(localSocket);
352 }
353
354 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
355 if (startXmpp(localSocket)) {
356 localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
357 if (!hardcoded && !result.equals(storedBackupResult)) {
358 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
359 }
360 break; // successfully connected to server that speaks xmpp
361 } else {
362 FileBackend.close(localSocket);
363 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
364 }
365 } catch (final StateChangingException e) {
366 if (!iterator.hasNext()) {
367 throw e;
368 }
369 } catch (InterruptedException e) {
370 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
371 return;
372 } catch (final Throwable e) {
373 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
374 if (!iterator.hasNext()) {
375 throw new UnknownHostException();
376 }
377 }
378 }
379 }
380 processStream();
381 } catch (final SecurityException e) {
382 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
383 } catch (final StateChangingException e) {
384 this.changeStatus(e.state);
385 } catch (final UnknownHostException | ConnectException | SocksSocketFactory.HostNotFoundException e) {
386 this.changeStatus(Account.State.SERVER_NOT_FOUND);
387 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
388 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
389 } catch (final IOException | XmlPullParserException e) {
390 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
391 this.changeStatus(Account.State.OFFLINE);
392 this.attempt = Math.max(0, this.attempt - 1);
393 } finally {
394 if (!Thread.currentThread().isInterrupted()) {
395 forceCloseSocket();
396 } else {
397 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
398 }
399 }
400 }
401
402 /**
403 * Starts xmpp protocol, call after connecting to socket
404 *
405 * @return true if server returns with valid xmpp, false otherwise
406 */
407 private boolean startXmpp(Socket socket) throws Exception {
408 if (Thread.currentThread().isInterrupted()) {
409 throw new InterruptedException();
410 }
411 this.socket = socket;
412 tagReader = new XmlReader();
413 if (tagWriter != null) {
414 tagWriter.forceClose();
415 }
416 tagWriter = new TagWriter();
417 tagWriter.setOutputStream(socket.getOutputStream());
418 tagReader.setInputStream(socket.getInputStream());
419 tagWriter.beginDocument();
420 sendStartStream();
421 final Tag tag = tagReader.readTag();
422 if (Thread.currentThread().isInterrupted()) {
423 throw new InterruptedException();
424 }
425 if (socket instanceof SSLSocket) {
426 SSLSocketHelper.log(account, (SSLSocket) socket);
427 }
428 return tag != null && tag.isStart("stream");
429 }
430
431 private SSLSocketFactory getSSLSocketFactory() throws NoSuchAlgorithmException, KeyManagementException {
432 final SSLContext sc = SSLSocketHelper.getSSLContext();
433 final MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
434 final KeyManager[] keyManager;
435 if (account.getPrivateKeyAlias() != null) {
436 keyManager = new KeyManager[]{new MyKeyManager()};
437 } else {
438 keyManager = null;
439 }
440 final String domain = account.getServer();
441 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
442 return sc.getSocketFactory();
443 }
444
445 @Override
446 public void run() {
447 synchronized (this) {
448 this.mThread = Thread.currentThread();
449 if (this.mThread.isInterrupted()) {
450 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
451 return;
452 }
453 forceCloseSocket();
454 }
455 connect();
456 }
457
458 private void processStream() throws XmlPullParserException, IOException {
459 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
460 this.mStreamCountDownLatch = streamCountDownLatch;
461 Tag nextTag = tagReader.readTag();
462 while (nextTag != null && !nextTag.isEnd("stream")) {
463 if (nextTag.isStart("error")) {
464 processStreamError(nextTag);
465 } else if (nextTag.isStart("features")) {
466 processStreamFeatures(nextTag);
467 } else if (nextTag.isStart("proceed")) {
468 switchOverToTls();
469 } else if (nextTag.isStart("success")) {
470 final String challenge = tagReader.readElement(nextTag).getContent();
471 try {
472 saslMechanism.getResponse(challenge);
473 } catch (final SaslMechanism.AuthenticationException e) {
474 Log.e(Config.LOGTAG, String.valueOf(e));
475 throw new StateChangingException(Account.State.UNAUTHORIZED);
476 }
477 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in");
478 account.setKey(Account.PINNED_MECHANISM_KEY,
479 String.valueOf(saslMechanism.getPriority()));
480 tagReader.reset();
481 sendStartStream();
482 final Tag tag = tagReader.readTag();
483 if (tag != null && tag.isStart("stream")) {
484 processStream();
485 } else {
486 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
487 }
488 break;
489 } else if (nextTag.isStart("failure")) {
490 final Element failure = tagReader.readElement(nextTag);
491 if (Namespace.SASL.equals(failure.getNamespace())) {
492 final String text = failure.findChildContent("text");
493 if (failure.hasChild("account-disabled") && text != null) {
494 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
495 if (matcher.find()) {
496 final HttpUrl url;
497 try {
498 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
499 if (url.isHttps()) {
500 this.redirectionUrl = url;
501 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
502 }
503 } catch (IllegalArgumentException e) {
504 throw new StateChangingException(Account.State.UNAUTHORIZED);
505 }
506 }
507 }
508 throw new StateChangingException(Account.State.UNAUTHORIZED);
509 } else if (Namespace.TLS.equals(failure.getNamespace())) {
510 throw new StateChangingException(Account.State.TLS_ERROR);
511 } else {
512 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
513 }
514 } else if (nextTag.isStart("challenge")) {
515 final String challenge = tagReader.readElement(nextTag).getContent();
516 final Element response = new Element("response", Namespace.SASL);
517 try {
518 response.setContent(saslMechanism.getResponse(challenge));
519 } catch (final SaslMechanism.AuthenticationException e) {
520 // TODO: Send auth abort tag.
521 Log.e(Config.LOGTAG, e.toString());
522 }
523 tagWriter.writeElement(response);
524 } else if (nextTag.isStart("enabled")) {
525 final Element enabled = tagReader.readElement(nextTag);
526 if ("true".equals(enabled.getAttribute("resume"))) {
527 this.streamId = enabled.getAttribute("id");
528 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
529 + ": stream management(" + smVersion
530 + ") enabled (resumable)");
531 } else {
532 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
533 + ": stream management(" + smVersion + ") enabled");
534 }
535 this.stanzasReceived = 0;
536 this.inSmacksSession = true;
537 final RequestPacket r = new RequestPacket(smVersion);
538 tagWriter.writeStanzaAsync(r);
539 } else if (nextTag.isStart("resumed")) {
540 this.inSmacksSession = true;
541 this.isBound = true;
542 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
543 lastPacketReceived = SystemClock.elapsedRealtime();
544 final Element resumed = tagReader.readElement(nextTag);
545 final String h = resumed.getAttribute("h");
546 try {
547 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
548 final boolean acknowledgedMessages;
549 synchronized (this.mStanzaQueue) {
550 final int serverCount = Integer.parseInt(h);
551 if (serverCount < stanzasSent) {
552 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
553 + ": session resumed with lost packages");
554 stanzasSent = serverCount;
555 } else {
556 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
557 }
558 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
559 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
560 failedStanzas.add(mStanzaQueue.valueAt(i));
561 }
562 mStanzaQueue.clear();
563 }
564 if (acknowledgedMessages) {
565 mXmppConnectionService.updateConversationUi();
566 }
567 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
568 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
569 if (packet instanceof MessagePacket) {
570 MessagePacket message = (MessagePacket) packet;
571 mXmppConnectionService.markMessage(account,
572 message.getTo().asBareJid(),
573 message.getId(),
574 Message.STATUS_UNSEND);
575 }
576 sendPacket(packet);
577 }
578 } catch (final NumberFormatException ignored) {
579 }
580 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
581 changeStatus(Account.State.ONLINE);
582 } else if (nextTag.isStart("r")) {
583 tagReader.readElement(nextTag);
584 if (Config.EXTENDED_SM_LOGGING) {
585 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
586 }
587 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
588 tagWriter.writeStanzaAsync(ack);
589 } else if (nextTag.isStart("a")) {
590 boolean accountUiNeedsRefresh = false;
591 synchronized (NotificationService.CATCHUP_LOCK) {
592 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
593 final int messageCount = mSmCatchupMessageCounter.get();
594 final int pendingIQs = packetCallbacks.size();
595 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (messages=" + messageCount + ", pending IQs=" + pendingIQs + ")");
596 accountUiNeedsRefresh = true;
597 if (messageCount > 0) {
598 mXmppConnectionService.getNotificationService().finishBacklog(true, account);
599 }
600 }
601 }
602 if (accountUiNeedsRefresh) {
603 mXmppConnectionService.updateAccountUi();
604 }
605 final Element ack = tagReader.readElement(nextTag);
606 lastPacketReceived = SystemClock.elapsedRealtime();
607 try {
608 final boolean acknowledgedMessages;
609 synchronized (this.mStanzaQueue) {
610 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
611 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
612 }
613 if (acknowledgedMessages) {
614 mXmppConnectionService.updateConversationUi();
615 }
616 } catch (NumberFormatException | NullPointerException e) {
617 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
618 }
619 } else if (nextTag.isStart("failed")) {
620 Element failed = tagReader.readElement(nextTag);
621 try {
622 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
623 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
624 final boolean acknowledgedMessages;
625 synchronized (this.mStanzaQueue) {
626 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
627 }
628 if (acknowledgedMessages) {
629 mXmppConnectionService.updateConversationUi();
630 }
631 } catch (NumberFormatException | NullPointerException e) {
632 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
633 }
634 resetStreamId();
635 sendBindRequest();
636 } else if (nextTag.isStart("iq")) {
637 processIq(nextTag);
638 } else if (nextTag.isStart("message")) {
639 processMessage(nextTag);
640 } else if (nextTag.isStart("presence")) {
641 processPresence(nextTag);
642 }
643 nextTag = tagReader.readTag();
644 }
645 if (nextTag != null && nextTag.isEnd("stream")) {
646 streamCountDownLatch.countDown();
647 }
648 }
649
650 private boolean acknowledgeStanzaUpTo(int serverCount) {
651 if (serverCount > stanzasSent) {
652 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
653 }
654 boolean acknowledgedMessages = false;
655 for (int i = 0; i < mStanzaQueue.size(); ++i) {
656 if (serverCount >= mStanzaQueue.keyAt(i)) {
657 if (Config.EXTENDED_SM_LOGGING) {
658 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
659 }
660 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
661 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
662 final MessagePacket packet = (MessagePacket) stanza;
663 final String id = packet.getId();
664 final Jid to = packet.getTo();
665 if (id != null && to != null) {
666 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, to, id);
667 }
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 SSLSocketFactory sslSocketFactory;
818 try {
819 sslSocketFactory = getSSLSocketFactory();
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) sslSocketFactory.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 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
829 try {
830 if (!xmppDomainVerifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
831 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate domain verification failed");
832 FileBackend.close(sslSocket);
833 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
834 }
835 } catch (final SSLPeerUnverifiedException e) {
836 FileBackend.close(sslSocket);
837 throw new StateChangingException(Account.State.TLS_ERROR);
838 }
839 return sslSocket;
840 }
841
842 private void processStreamFeatures(final Tag currentTag) throws IOException {
843 this.streamFeatures = tagReader.readElement(currentTag);
844 final boolean isSecure = features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
845 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
846 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
847 sendStartTLS();
848 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
849 if (isSecure) {
850 register();
851 } else {
852 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find STARTTLS for registration process " + XmlHelper.printElementNames(this.streamFeatures));
853 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
854 }
855 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
856 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
857 } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && isSecure) {
858 authenticate();
859 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
860 if (Config.EXTENDED_SM_LOGGING) {
861 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resuming after stanza #" + stanzasReceived);
862 }
863 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
864 this.mSmCatchupMessageCounter.set(0);
865 this.mWaitingForSmCatchup.set(true);
866 this.tagWriter.writeStanzaAsync(resume);
867 } else if (needsBinding) {
868 if (this.streamFeatures.hasChild("bind") && isSecure) {
869 sendBindRequest();
870 } else {
871 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find bind feature " + XmlHelper.printElementNames(this.streamFeatures));
872 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
873 }
874 }
875 }
876
877 private void authenticate() throws IOException {
878 final List<String> mechanisms = extractMechanisms(streamFeatures.findChild("mechanisms"));
879 final Element auth = new Element("auth", Namespace.SASL);
880 if (mechanisms.contains(External.MECHANISM) && account.getPrivateKeyAlias() != null) {
881 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
882 } else if (mechanisms.contains(ScramSha512.MECHANISM)) {
883 saslMechanism = new ScramSha512(tagWriter, account, mXmppConnectionService.getRNG());
884 } else if (mechanisms.contains(ScramSha256.MECHANISM)) {
885 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
886 } else if (mechanisms.contains(ScramSha1.MECHANISM)) {
887 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
888 } else if (mechanisms.contains(Plain.MECHANISM) && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
889 saslMechanism = new Plain(tagWriter, account);
890 } else if (mechanisms.contains(DigestMd5.MECHANISM)) {
891 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
892 } else if (mechanisms.contains(Anonymous.MECHANISM)) {
893 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
894 }
895 if (saslMechanism != null) {
896 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
897 if (pinnedMechanism > saslMechanism.getPriority()) {
898 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
899 " has lower priority (" + saslMechanism.getPriority() +
900 ") than pinned priority (" + pinnedMechanism +
901 "). Possible downgrade attack?");
902 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
903 }
904 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
905 auth.setAttribute("mechanism", saslMechanism.getMechanism());
906 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
907 auth.setContent(saslMechanism.getClientFirstMessage());
908 }
909 tagWriter.writeElement(auth);
910 } else {
911 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find supported SASL mechanism in " + mechanisms);
912 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
913 }
914 }
915
916 private List<String> extractMechanisms(final Element stream) {
917 final ArrayList<String> mechanisms = new ArrayList<>(stream
918 .getChildren().size());
919 for (final Element child : stream.getChildren()) {
920 mechanisms.add(child.getContent());
921 }
922 return mechanisms;
923 }
924
925
926 private void register() {
927 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
928 if (preAuth != null && features.invite()) {
929 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
930 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
931 sendUnmodifiedIqPacket(preAuthRequest, (account, response) -> {
932 if (response.getType() == IqPacket.TYPE.RESULT) {
933 sendRegistryRequest();
934 } else {
935 final String error = response.getErrorCondition();
936 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": failed to pre auth. " + error);
937 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
938 }
939 }, true);
940 } else {
941 sendRegistryRequest();
942 }
943 }
944
945 private void sendRegistryRequest() {
946 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
947 register.query(Namespace.REGISTER);
948 register.setTo(account.getDomain());
949 sendUnmodifiedIqPacket(register, (account, packet) -> {
950 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
951 return;
952 }
953 if (packet.getType() == IqPacket.TYPE.ERROR) {
954 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
955 }
956 final Element query = packet.query(Namespace.REGISTER);
957 if (query.hasChild("username") && (query.hasChild("password"))) {
958 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
959 final Element username = new Element("username").setContent(account.getUsername());
960 final Element password = new Element("password").setContent(account.getPassword());
961 register1.query(Namespace.REGISTER).addChild(username);
962 register1.query().addChild(password);
963 register1.setFrom(account.getJid().asBareJid());
964 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
965 } else if (query.hasChild("x", Namespace.DATA)) {
966 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
967 final Element blob = query.findChild("data", "urn:xmpp:bob");
968 final String id = packet.getId();
969 InputStream is;
970 if (blob != null) {
971 try {
972 final String base64Blob = blob.getContent();
973 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
974 is = new ByteArrayInputStream(strBlob);
975 } catch (Exception e) {
976 is = null;
977 }
978 } else {
979 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
980 try {
981 final String url = data.getValue("url");
982 final String fallbackUrl = data.getValue("captcha-fallback-url");
983 if (url != null) {
984 is = HttpConnectionManager.open(url, useTor);
985 } else if (fallbackUrl != null) {
986 is = HttpConnectionManager.open(fallbackUrl, useTor);
987 } else {
988 is = null;
989 }
990 } catch (final IOException e) {
991 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to fetch captcha", e);
992 is = null;
993 }
994 }
995
996 if (is != null) {
997 Bitmap captcha = BitmapFactory.decodeStream(is);
998 try {
999 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
1000 return;
1001 }
1002 } catch (Exception e) {
1003 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1004 }
1005 }
1006 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1007 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
1008 final String instructions = query.findChildContent("instructions");
1009 final Element oob = query.findChild("x", Namespace.OOB);
1010 final String url = oob == null ? null : oob.findChildContent("url");
1011 if (url != null) {
1012 setAccountCreationFailed(url);
1013 } else if (instructions != null) {
1014 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1015 if (matcher.find()) {
1016 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
1017 }
1018 }
1019 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1020 }
1021 }, true);
1022 }
1023
1024 private void setAccountCreationFailed(final String url) {
1025 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1026 if (httpUrl != null && httpUrl.isHttps()) {
1027 this.redirectionUrl = httpUrl;
1028 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1029 }
1030 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1031 }
1032
1033 public HttpUrl getRedirectionUrl() {
1034 return this.redirectionUrl;
1035 }
1036
1037 public void resetEverything() {
1038 resetAttemptCount(true);
1039 resetStreamId();
1040 clearIqCallbacks();
1041 this.stanzasSent = 0;
1042 mStanzaQueue.clear();
1043 this.redirectionUrl = null;
1044 synchronized (this.disco) {
1045 disco.clear();
1046 }
1047 synchronized (this.commands) {
1048 this.commands.clear();
1049 }
1050 }
1051
1052 private void sendBindRequest() {
1053 try {
1054 mXmppConnectionService.restoredFromDatabaseLatch.await();
1055 } catch (InterruptedException e) {
1056 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1057 return;
1058 }
1059 clearIqCallbacks();
1060 if (account.getJid().isBareJid()) {
1061 account.setResource(this.createNewResource());
1062 } else {
1063 fixResource(mXmppConnectionService, account);
1064 }
1065 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1066 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1067 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1068 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1069 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1070 return;
1071 }
1072 final Element bind = packet.findChild("bind");
1073 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1074 isBound = true;
1075 final Element jid = bind.findChild("jid");
1076 if (jid != null && jid.getContent() != null) {
1077 try {
1078 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1079 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1080 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1081 throw new StateChangingError(Account.State.BIND_FAILURE);
1082 }
1083 if (account.setJid(assignedJid)) {
1084 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1085 mXmppConnectionService.databaseBackend.updateAccount(account);
1086 }
1087 if (streamFeatures.hasChild("session")
1088 && !streamFeatures.findChild("session").hasChild("optional")) {
1089 sendStartSession();
1090 } else {
1091 sendPostBindInitialization();
1092 }
1093 return;
1094 } catch (final IllegalArgumentException e) {
1095 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1096 }
1097 } else {
1098 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1099 }
1100 } else {
1101 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1102 }
1103 final Element error = packet.findChild("error");
1104 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1105 account.setResource(createNewResource());
1106 }
1107 throw new StateChangingError(Account.State.BIND_FAILURE);
1108 }, true);
1109 }
1110
1111 private void clearIqCallbacks() {
1112 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1113 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1114 synchronized (this.packetCallbacks) {
1115 if (this.packetCallbacks.size() == 0) {
1116 return;
1117 }
1118 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1119 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1120 while (iterator.hasNext()) {
1121 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1122 callbacks.add(entry.second);
1123 iterator.remove();
1124 }
1125 }
1126 for (OnIqPacketReceived callback : callbacks) {
1127 try {
1128 callback.onIqPacketReceived(account, failurePacket);
1129 } catch (StateChangingError error) {
1130 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1131 //ignore
1132 }
1133 }
1134 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1135 }
1136
1137 public void sendDiscoTimeout() {
1138 if (mWaitForDisco.compareAndSet(true, false)) {
1139 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1140 finalizeBind();
1141 }
1142 }
1143
1144 private void sendStartSession() {
1145 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1146 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1147 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1148 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1149 if (packet.getType() == IqPacket.TYPE.RESULT) {
1150 sendPostBindInitialization();
1151 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1152 throw new StateChangingError(Account.State.SESSION_FAILURE);
1153 }
1154 }, true);
1155 }
1156
1157 private void sendPostBindInitialization() {
1158 smVersion = 0;
1159 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1160 smVersion = 3;
1161 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1162 smVersion = 2;
1163 }
1164 if (smVersion != 0) {
1165 synchronized (this.mStanzaQueue) {
1166 final EnablePacket enable = new EnablePacket(smVersion);
1167 tagWriter.writeStanzaAsync(enable);
1168 stanzasSent = 0;
1169 mStanzaQueue.clear();
1170 }
1171 }
1172 features.carbonsEnabled = false;
1173 features.blockListRequested = false;
1174 synchronized (this.disco) {
1175 this.disco.clear();
1176 }
1177 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1178 mPendingServiceDiscoveries.set(0);
1179 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain().toEscapedString())) {
1180 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1181 mWaitForDisco.set(false);
1182 } else {
1183 mWaitForDisco.set(true);
1184 }
1185 lastDiscoStarted = SystemClock.elapsedRealtime();
1186 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1187 Element caps = streamFeatures.findChild("c");
1188 final String hash = caps == null ? null : caps.getAttribute("hash");
1189 final String ver = caps == null ? null : caps.getAttribute("ver");
1190 ServiceDiscoveryResult discoveryResult = null;
1191 if (hash != null && ver != null) {
1192 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1193 }
1194 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1195 if (requestDiscoItemsFirst) {
1196 sendServiceDiscoveryItems(account.getDomain());
1197 }
1198 if (discoveryResult == null) {
1199 sendServiceDiscoveryInfo(account.getDomain());
1200 } else {
1201 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1202 disco.put(account.getDomain(), discoveryResult);
1203 }
1204 discoverMamPreferences();
1205 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1206 if (!requestDiscoItemsFirst) {
1207 sendServiceDiscoveryItems(account.getDomain());
1208 }
1209
1210 if (!mWaitForDisco.get()) {
1211 finalizeBind();
1212 }
1213 this.lastSessionStarted = SystemClock.elapsedRealtime();
1214 }
1215
1216 private void sendServiceDiscoveryInfo(final Jid jid) {
1217 mPendingServiceDiscoveries.incrementAndGet();
1218 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1219 iq.setTo(jid);
1220 iq.query("http://jabber.org/protocol/disco#info");
1221 this.sendIqPacket(iq, (account, packet) -> {
1222 if (packet.getType() == IqPacket.TYPE.RESULT) {
1223 boolean advancedStreamFeaturesLoaded;
1224 synchronized (XmppConnection.this.disco) {
1225 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1226 if (jid.equals(account.getDomain())) {
1227 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1228 }
1229 disco.put(jid, result);
1230 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain())
1231 && disco.containsKey(account.getJid().asBareJid());
1232 }
1233 if (advancedStreamFeaturesLoaded && (jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid()))) {
1234 enableAdvancedStreamFeatures();
1235 }
1236 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1237 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1238 final boolean serverOrAccount = jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid());
1239 final boolean advancedStreamFeaturesLoaded;
1240 if (serverOrAccount) {
1241 synchronized (XmppConnection.this.disco) {
1242 disco.put(jid, ServiceDiscoveryResult.empty());
1243 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain()) && disco.containsKey(account.getJid().asBareJid());
1244 }
1245 } else {
1246 advancedStreamFeaturesLoaded = false;
1247 }
1248 if (advancedStreamFeaturesLoaded) {
1249 enableAdvancedStreamFeatures();
1250 }
1251 }
1252 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1253 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1254 && mWaitForDisco.compareAndSet(true, false)) {
1255 finalizeBind();
1256 }
1257 }
1258 });
1259 }
1260
1261 private void discoverMamPreferences() {
1262 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1263 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1264 sendIqPacket(request, (account, response) -> {
1265 if (response.getType() == IqPacket.TYPE.RESULT) {
1266 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1267 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1268 }
1269 });
1270 }
1271
1272 private void discoverCommands() {
1273 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1274 request.setTo(account.getDomain());
1275 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1276 sendIqPacket(request, (account, response) -> {
1277 if (response.getType() == IqPacket.TYPE.RESULT) {
1278 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1279 if (query == null) {
1280 return;
1281 }
1282 final HashMap<String, Jid> commands = new HashMap<>();
1283 for (final Element child : query.getChildren()) {
1284 if ("item".equals(child.getName())) {
1285 final String node = child.getAttribute("node");
1286 final Jid jid = child.getAttributeAsJid("jid");
1287 if (node != null && jid != null) {
1288 commands.put(node, jid);
1289 }
1290 }
1291 }
1292 Log.d(Config.LOGTAG, commands.toString());
1293 synchronized (this.commands) {
1294 this.commands.clear();
1295 this.commands.putAll(commands);
1296 }
1297 }
1298 });
1299 }
1300
1301 public boolean isMamPreferenceAlways() {
1302 return isMamPreferenceAlways;
1303 }
1304
1305 private void finalizeBind() {
1306 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1307 if (bindListener != null) {
1308 bindListener.onBind(account);
1309 }
1310 changeStatus(Account.State.ONLINE);
1311 }
1312
1313 private void enableAdvancedStreamFeatures() {
1314 if (getFeatures().blocking() && !features.blockListRequested) {
1315 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1316 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1317 }
1318 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1319 listener.onAdvancedStreamFeaturesAvailable(account);
1320 }
1321 if (getFeatures().carbons() && !features.carbonsEnabled) {
1322 sendEnableCarbons();
1323 }
1324 if (getFeatures().commands()) {
1325 discoverCommands();
1326 }
1327 }
1328
1329 private void sendServiceDiscoveryItems(final Jid server) {
1330 mPendingServiceDiscoveries.incrementAndGet();
1331 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1332 iq.setTo(server.getDomain());
1333 iq.query("http://jabber.org/protocol/disco#items");
1334 this.sendIqPacket(iq, (account, packet) -> {
1335 if (packet.getType() == IqPacket.TYPE.RESULT) {
1336 final HashSet<Jid> items = new HashSet<>();
1337 final List<Element> elements = packet.query().getChildren();
1338 for (final Element element : elements) {
1339 if (element.getName().equals("item")) {
1340 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1341 if (jid != null && !jid.equals(account.getDomain())) {
1342 items.add(jid);
1343 }
1344 }
1345 }
1346 for (Jid jid : items) {
1347 sendServiceDiscoveryInfo(jid);
1348 }
1349 } else {
1350 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1351 }
1352 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1353 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1354 && mWaitForDisco.compareAndSet(true, false)) {
1355 finalizeBind();
1356 }
1357 }
1358 });
1359 }
1360
1361 private void sendEnableCarbons() {
1362 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1363 iq.addChild("enable", "urn:xmpp:carbons:2");
1364 this.sendIqPacket(iq, (account, packet) -> {
1365 if (!packet.hasChild("error")) {
1366 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1367 + ": successfully enabled carbons");
1368 features.carbonsEnabled = true;
1369 } else {
1370 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1371 + ": error enableing carbons " + packet.toString());
1372 }
1373 });
1374 }
1375
1376 private void processStreamError(final Tag currentTag) throws IOException {
1377 final Element streamError = tagReader.readElement(currentTag);
1378 if (streamError == null) {
1379 return;
1380 }
1381 if (streamError.hasChild("conflict")) {
1382 account.setResource(createNewResource());
1383 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1384 throw new IOException();
1385 } else if (streamError.hasChild("host-unknown")) {
1386 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1387 } else if (streamError.hasChild("policy-violation")) {
1388 this.lastConnect = SystemClock.elapsedRealtime();
1389 final String text = streamError.findChildContent("text");
1390 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1391 failPendingMessages(text);
1392 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1393 } else {
1394 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString());
1395 throw new StateChangingException(Account.State.STREAM_ERROR);
1396 }
1397 }
1398
1399 private void failPendingMessages(final String error) {
1400 synchronized (this.mStanzaQueue) {
1401 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1402 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1403 if (stanza instanceof MessagePacket) {
1404 final MessagePacket packet = (MessagePacket) stanza;
1405 final String id = packet.getId();
1406 final Jid to = packet.getTo();
1407 mXmppConnectionService.markMessage(account,
1408 to.asBareJid(),
1409 id,
1410 Message.STATUS_SEND_FAILED,
1411 error);
1412 }
1413 }
1414 }
1415 }
1416
1417 private void sendStartStream() throws IOException {
1418 final Tag stream = Tag.start("stream:stream");
1419 stream.setAttribute("to", account.getServer());
1420 stream.setAttribute("version", "1.0");
1421 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1422 stream.setAttribute("xmlns", "jabber:client");
1423 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1424 tagWriter.writeTag(stream);
1425 }
1426
1427 private String createNewResource() {
1428 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1429 }
1430
1431 private String nextRandomId() {
1432 return nextRandomId(false);
1433 }
1434
1435 private String nextRandomId(boolean s) {
1436 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1437 }
1438
1439 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1440 packet.setFrom(account.getJid());
1441 return this.sendUnmodifiedIqPacket(packet, callback, false);
1442 }
1443
1444 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1445 if (packet.getId() == null) {
1446 packet.setAttribute("id", nextRandomId());
1447 }
1448 if (callback != null) {
1449 synchronized (this.packetCallbacks) {
1450 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1451 }
1452 }
1453 this.sendPacket(packet, force);
1454 return packet.getId();
1455 }
1456
1457 public void sendMessagePacket(final MessagePacket packet) {
1458 this.sendPacket(packet);
1459 }
1460
1461 public void sendPresencePacket(final PresencePacket packet) {
1462 this.sendPacket(packet);
1463 }
1464
1465 private synchronized void sendPacket(final AbstractStanza packet) {
1466 sendPacket(packet, false);
1467 }
1468
1469 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1470 if (stanzasSent == Integer.MAX_VALUE) {
1471 resetStreamId();
1472 disconnect(true);
1473 return;
1474 }
1475 synchronized (this.mStanzaQueue) {
1476 if (force || isBound) {
1477 tagWriter.writeStanzaAsync(packet);
1478 } else {
1479 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1480 }
1481 if (packet instanceof AbstractAcknowledgeableStanza) {
1482 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1483
1484 if (this.mStanzaQueue.size() != 0) {
1485 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1486 if (currentHighestKey != stanzasSent) {
1487 throw new AssertionError("Stanza count messed up");
1488 }
1489 }
1490
1491 ++stanzasSent;
1492 this.mStanzaQueue.append(stanzasSent, stanza);
1493 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1494 if (Config.EXTENDED_SM_LOGGING) {
1495 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1496 }
1497 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1498 }
1499 }
1500 }
1501 }
1502
1503 public void sendPing() {
1504 if (!r()) {
1505 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1506 iq.setFrom(account.getJid());
1507 iq.addChild("ping", Namespace.PING);
1508 this.sendIqPacket(iq, null);
1509 }
1510 this.lastPingSent = SystemClock.elapsedRealtime();
1511 }
1512
1513 public void setOnMessagePacketReceivedListener(
1514 final OnMessagePacketReceived listener) {
1515 this.messageListener = listener;
1516 }
1517
1518 public void setOnUnregisteredIqPacketReceivedListener(
1519 final OnIqPacketReceived listener) {
1520 this.unregisteredIqListener = listener;
1521 }
1522
1523 public void setOnPresencePacketReceivedListener(
1524 final OnPresencePacketReceived listener) {
1525 this.presenceListener = listener;
1526 }
1527
1528 public void setOnJinglePacketReceivedListener(
1529 final OnJinglePacketReceived listener) {
1530 this.jingleListener = listener;
1531 }
1532
1533 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1534 this.statusListener = listener;
1535 }
1536
1537 public void setOnBindListener(final OnBindListener listener) {
1538 this.bindListener = listener;
1539 }
1540
1541 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1542 this.acknowledgedListener = listener;
1543 }
1544
1545 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1546 this.advancedStreamFeaturesLoadedListeners.add(listener);
1547 }
1548
1549 private void forceCloseSocket() {
1550 FileBackend.close(this.socket);
1551 FileBackend.close(this.tagReader);
1552 }
1553
1554 public void interrupt() {
1555 if (this.mThread != null) {
1556 this.mThread.interrupt();
1557 }
1558 }
1559
1560 public void disconnect(final boolean force) {
1561 interrupt();
1562 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1563 if (force) {
1564 forceCloseSocket();
1565 } else {
1566 final TagWriter currentTagWriter = this.tagWriter;
1567 if (currentTagWriter.isActive()) {
1568 currentTagWriter.finish();
1569 final Socket currentSocket = this.socket;
1570 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1571 try {
1572 currentTagWriter.await(1, TimeUnit.SECONDS);
1573 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1574 currentTagWriter.writeTag(Tag.end("stream:stream"));
1575 if (streamCountDownLatch != null) {
1576 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1577 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1578 } else {
1579 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1580 }
1581 }
1582 } catch (InterruptedException e) {
1583 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1584 } catch (final IOException e) {
1585 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1586 } finally {
1587 FileBackend.close(currentSocket);
1588 }
1589 } else {
1590 forceCloseSocket();
1591 }
1592 }
1593 }
1594
1595 private void resetStreamId() {
1596 this.streamId = null;
1597 }
1598
1599 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1600 synchronized (this.disco) {
1601 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1602 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1603 if (cursor.getValue().getFeatures().contains(feature)) {
1604 items.add(cursor);
1605 }
1606 }
1607 return items;
1608 }
1609 }
1610
1611 public Jid findDiscoItemByFeature(final String feature) {
1612 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1613 if (items.size() >= 1) {
1614 return items.get(0).getKey();
1615 }
1616 return null;
1617 }
1618
1619 public boolean r() {
1620 if (getFeatures().sm()) {
1621 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1622 return true;
1623 } else {
1624 return false;
1625 }
1626 }
1627
1628 public List<String> getMucServersWithholdAccount() {
1629 final List<String> servers = getMucServers();
1630 servers.remove(account.getDomain().toEscapedString());
1631 return servers;
1632 }
1633
1634 public List<String> getMucServers() {
1635 List<String> servers = new ArrayList<>();
1636 synchronized (this.disco) {
1637 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1638 final ServiceDiscoveryResult value = cursor.getValue();
1639 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1640 && value.hasIdentity("conference", "text")
1641 && !value.getFeatures().contains("jabber:iq:gateway")
1642 && !value.hasIdentity("conference", "irc")) {
1643 servers.add(cursor.getKey().toString());
1644 }
1645 }
1646 }
1647 return servers;
1648 }
1649
1650 public String getMucServer() {
1651 List<String> servers = getMucServers();
1652 return servers.size() > 0 ? servers.get(0) : null;
1653 }
1654
1655 public int getTimeToNextAttempt() {
1656 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1657 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1658 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1659 return interval - secondsSinceLast;
1660 }
1661
1662 public int getAttempt() {
1663 return this.attempt;
1664 }
1665
1666 public Features getFeatures() {
1667 return this.features;
1668 }
1669
1670 public long getLastSessionEstablished() {
1671 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1672 return System.currentTimeMillis() - diff;
1673 }
1674
1675 public long getLastConnect() {
1676 return this.lastConnect;
1677 }
1678
1679 public long getLastPingSent() {
1680 return this.lastPingSent;
1681 }
1682
1683 public long getLastDiscoStarted() {
1684 return this.lastDiscoStarted;
1685 }
1686
1687 public long getLastPacketReceived() {
1688 return this.lastPacketReceived;
1689 }
1690
1691 public void sendActive() {
1692 this.sendPacket(new ActivePacket());
1693 }
1694
1695 public void sendInactive() {
1696 this.sendPacket(new InactivePacket());
1697 }
1698
1699 public void resetAttemptCount(boolean resetConnectTime) {
1700 this.attempt = 0;
1701 if (resetConnectTime) {
1702 this.lastConnect = 0;
1703 }
1704 }
1705
1706 public void setInteractive(boolean interactive) {
1707 this.mInteractive = interactive;
1708 }
1709
1710 public Identity getServerIdentity() {
1711 synchronized (this.disco) {
1712 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1713 if (result == null) {
1714 return Identity.UNKNOWN;
1715 }
1716 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1717 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1718 switch (id.getName()) {
1719 case "Prosody":
1720 return Identity.PROSODY;
1721 case "ejabberd":
1722 return Identity.EJABBERD;
1723 case "Slack-XMPP":
1724 return Identity.SLACK;
1725 }
1726 }
1727 }
1728 }
1729 return Identity.UNKNOWN;
1730 }
1731
1732 private IqGenerator getIqGenerator() {
1733 return mXmppConnectionService.getIqGenerator();
1734 }
1735
1736 public enum Identity {
1737 FACEBOOK,
1738 SLACK,
1739 EJABBERD,
1740 PROSODY,
1741 NIMBUZZ,
1742 UNKNOWN
1743 }
1744
1745 private class MyKeyManager implements X509KeyManager {
1746 @Override
1747 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1748 return account.getPrivateKeyAlias();
1749 }
1750
1751 @Override
1752 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1753 return null;
1754 }
1755
1756 @Override
1757 public X509Certificate[] getCertificateChain(String alias) {
1758 Log.d(Config.LOGTAG, "getting certificate chain");
1759 try {
1760 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1761 } catch (Exception e) {
1762 Log.d(Config.LOGTAG, e.getMessage());
1763 return new X509Certificate[0];
1764 }
1765 }
1766
1767 @Override
1768 public String[] getClientAliases(String s, Principal[] principals) {
1769 final String alias = account.getPrivateKeyAlias();
1770 return alias != null ? new String[]{alias} : new String[0];
1771 }
1772
1773 @Override
1774 public String[] getServerAliases(String s, Principal[] principals) {
1775 return new String[0];
1776 }
1777
1778 @Override
1779 public PrivateKey getPrivateKey(String alias) {
1780 try {
1781 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1782 } catch (Exception e) {
1783 return null;
1784 }
1785 }
1786 }
1787
1788 private static class StateChangingError extends Error {
1789 private final Account.State state;
1790
1791 public StateChangingError(Account.State state) {
1792 this.state = state;
1793 }
1794 }
1795
1796 private static class StateChangingException extends IOException {
1797 private final Account.State state;
1798
1799 public StateChangingException(Account.State state) {
1800 this.state = state;
1801 }
1802 }
1803
1804 public class Features {
1805 XmppConnection connection;
1806 private boolean carbonsEnabled = false;
1807 private boolean encryptionEnabled = false;
1808 private boolean blockListRequested = false;
1809
1810 public Features(final XmppConnection connection) {
1811 this.connection = connection;
1812 }
1813
1814 private boolean hasDiscoFeature(final Jid server, final String feature) {
1815 synchronized (XmppConnection.this.disco) {
1816 return connection.disco.containsKey(server) &&
1817 connection.disco.get(server).getFeatures().contains(feature);
1818 }
1819 }
1820
1821 public boolean carbons() {
1822 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
1823 }
1824
1825 public boolean commands() {
1826 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
1827 }
1828
1829 public boolean easyOnboardingInvites() {
1830 synchronized (commands) {
1831 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
1832 }
1833 }
1834
1835 public boolean bookmarksConversion() {
1836 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1837 }
1838
1839 public boolean avatarConversion() {
1840 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
1841 }
1842
1843 public boolean blocking() {
1844 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
1845 }
1846
1847 public boolean spamReporting() {
1848 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
1849 }
1850
1851 public boolean flexibleOfflineMessageRetrieval() {
1852 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1853 }
1854
1855 public boolean register() {
1856 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
1857 }
1858
1859 public boolean invite() {
1860 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
1861 }
1862
1863 public boolean sm() {
1864 return streamId != null
1865 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1866 }
1867
1868 public boolean csi() {
1869 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1870 }
1871
1872 public boolean pep() {
1873 synchronized (XmppConnection.this.disco) {
1874 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1875 return info != null && info.hasIdentity("pubsub", "pep");
1876 }
1877 }
1878
1879 public boolean pepPersistent() {
1880 synchronized (XmppConnection.this.disco) {
1881 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1882 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1883 }
1884 }
1885
1886 public boolean pepPublishOptions() {
1887 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1888 }
1889
1890 public boolean pepOmemoWhitelisted() {
1891 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1892 }
1893
1894 public boolean mam() {
1895 return MessageArchiveService.Version.has(getAccountFeatures());
1896 }
1897
1898 public List<String> getAccountFeatures() {
1899 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1900 return result == null ? Collections.emptyList() : result.getFeatures();
1901 }
1902
1903 public boolean push() {
1904 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
1905 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
1906 }
1907
1908 public boolean rosterVersioning() {
1909 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1910 }
1911
1912 public void setBlockListRequested(boolean value) {
1913 this.blockListRequested = value;
1914 }
1915
1916 public boolean httpUpload(long filesize) {
1917 if (Config.DISABLE_HTTP_UPLOAD) {
1918 return false;
1919 } else {
1920 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1921 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1922 if (items.size() > 0) {
1923 try {
1924 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1925 if (filesize <= maxsize) {
1926 return true;
1927 } else {
1928 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
1929 return false;
1930 }
1931 } catch (Exception e) {
1932 return true;
1933 }
1934 }
1935 }
1936 return false;
1937 }
1938 }
1939
1940 public boolean useLegacyHttpUpload() {
1941 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
1942 }
1943
1944 public long getMaxHttpUploadSize() {
1945 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1946 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1947 if (items.size() > 0) {
1948 try {
1949 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1950 } catch (Exception e) {
1951 //ignored
1952 }
1953 }
1954 }
1955 return -1;
1956 }
1957
1958 public boolean stanzaIds() {
1959 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
1960 }
1961
1962 public boolean bookmarks2() {
1963 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
1964 }
1965
1966 public boolean externalServiceDiscovery() {
1967 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
1968 }
1969 }
1970}