1package eu.siacs.conversations.xmpp;
2
3import android.content.Context;
4import android.graphics.Bitmap;
5import android.graphics.BitmapFactory;
6import android.os.SystemClock;
7import android.security.KeyChain;
8import android.support.annotation.NonNull;
9import android.util.Base64;
10import android.util.Log;
11import android.util.Pair;
12import android.util.SparseArray;
13
14import org.xmlpull.v1.XmlPullParserException;
15
16import java.io.ByteArrayInputStream;
17import java.io.IOException;
18import java.io.InputStream;
19import java.net.ConnectException;
20import java.net.IDN;
21import java.net.InetAddress;
22import java.net.InetSocketAddress;
23import java.net.MalformedURLException;
24import java.net.Socket;
25import java.net.URL;
26import java.net.UnknownHostException;
27import java.security.KeyManagementException;
28import java.security.NoSuchAlgorithmException;
29import java.security.Principal;
30import java.security.PrivateKey;
31import java.security.cert.X509Certificate;
32import java.util.ArrayList;
33import java.util.Arrays;
34import java.util.Collections;
35import java.util.HashMap;
36import java.util.HashSet;
37import java.util.Hashtable;
38import java.util.Iterator;
39import java.util.List;
40import java.util.Map.Entry;
41import java.util.Set;
42import java.util.concurrent.CountDownLatch;
43import java.util.concurrent.TimeUnit;
44import java.util.concurrent.atomic.AtomicBoolean;
45import java.util.concurrent.atomic.AtomicInteger;
46import java.util.regex.Matcher;
47
48import javax.net.ssl.KeyManager;
49import javax.net.ssl.SSLContext;
50import javax.net.ssl.SSLSession;
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.entities.Account;
69import eu.siacs.conversations.entities.Message;
70import eu.siacs.conversations.entities.ServiceDiscoveryResult;
71import eu.siacs.conversations.generator.IqGenerator;
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.IP;
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.xml.Element;
84import eu.siacs.conversations.xml.Namespace;
85import eu.siacs.conversations.xml.Tag;
86import eu.siacs.conversations.xml.TagWriter;
87import eu.siacs.conversations.xml.XmlReader;
88import eu.siacs.conversations.xmpp.forms.Data;
89import eu.siacs.conversations.xmpp.forms.Field;
90import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
91import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
92import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
93import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
94import eu.siacs.conversations.xmpp.stanzas.IqPacket;
95import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
96import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
97import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
98import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
99import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
100import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
101import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
102import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
103import rocks.xmpp.addr.Jid;
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 = new OnIqPacketReceived() {
111 @Override
112 public void onIqPacketReceived(Account account, IqPacket packet) {
113 if (packet.getType() == IqPacket.TYPE.RESULT) {
114 account.setOption(Account.OPTION_REGISTER, false);
115 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
116 } else {
117 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
118 "The password is too weak",
119 "Please use a longer password.");
120 Element error = packet.findChild("error");
121 Account.State state = Account.State.REGISTRATION_FAILED;
122 if (error != null) {
123 if (error.hasChild("conflict")) {
124 state = Account.State.REGISTRATION_CONFLICT;
125 } else if (error.hasChild("resource-constraint")
126 && "wait".equals(error.getAttribute("type"))) {
127 state = Account.State.REGISTRATION_PLEASE_WAIT;
128 } else if (error.hasChild("not-acceptable")
129 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
130 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
131 }
132 }
133 throw new StateChangingError(state);
134 }
135 }
136 };
137 protected final Account account;
138 private final Features features = new Features(this);
139 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
140 private final 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 AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
161 private AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
162 private AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
163 private 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 URL 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 void prepareNewConnection() {
231 this.lastConnect = SystemClock.elapsedRealtime();
232 this.lastPingSent = SystemClock.elapsedRealtime();
233 this.lastDiscoStarted = Long.MAX_VALUE;
234 this.mWaitingForSmCatchup.set(false);
235 this.changeStatus(Account.State.CONNECTING);
236 }
237
238 public boolean isWaitingForSmCatchup() {
239 return mWaitingForSmCatchup.get();
240 }
241
242 public void incrementSmCatchupMessageCounter() {
243 this.mSmCatchupMessageCounter.incrementAndGet();
244 }
245
246 protected void connect() {
247 if (mXmppConnectionService.areMessagesInitialized()) {
248 mXmppConnectionService.resetSendingToWaiting(account);
249 }
250 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
251 features.encryptionEnabled = false;
252 inSmacksSession = false;
253 isBound = false;
254 this.attempt++;
255 this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec
256 try {
257 Socket localSocket;
258 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
259 this.changeStatus(Account.State.CONNECTING);
260 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
261 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
262 if (useTor) {
263 String destination;
264 if (account.getHostname().isEmpty()) {
265 destination = account.getServer();
266 } else {
267 destination = account.getHostname();
268 this.verifiedHostname = destination;
269 }
270 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor");
271 localSocket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
272 try {
273 startXmpp(localSocket);
274 } catch (InterruptedException e) {
275 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
276 return;
277 } catch (Exception e) {
278 throw new IOException(e.getMessage());
279 }
280 } else {
281 final String domain = account.getJid().getDomain();
282 final List<Resolver.Result> results;
283 final boolean hardcoded = extended && !account.getHostname().isEmpty();
284 if (hardcoded) {
285 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
286 } else {
287 results = Resolver.resolve(domain);
288 }
289 if (Thread.currentThread().isInterrupted()) {
290 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
291 return;
292 }
293 if (results.size() == 0) {
294 Log.e(Config.LOGTAG,account.getJid().asBareJid()+": Resolver results were empty");
295 return;
296 }
297 final Resolver.Result storedBackupResult;
298 if (hardcoded) {
299 storedBackupResult = null;
300 } else {
301 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
302 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
303 results.add(storedBackupResult);
304 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
305 }
306 }
307 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
308 final Resolver.Result result = iterator.next();
309 if (Thread.currentThread().isInterrupted()) {
310 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
311 return;
312 }
313 try {
314 // if tls is true, encryption is implied and must not be started
315 features.encryptionEnabled = result.isDirectTls();
316 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
317 Log.d(Config.LOGTAG,"verified hostname "+verifiedHostname);
318 final InetSocketAddress addr;
319 if (result.getIp() != null) {
320 addr = new InetSocketAddress(result.getIp(), result.getPort());
321 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
322 + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
323 + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
324 } else {
325 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
326 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
327 + ": using values from resolver "
328 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
329 }
330
331 if (!features.encryptionEnabled) {
332 localSocket = new Socket();
333 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
334 } else {
335 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
336 localSocket = tlsFactoryVerifier.factory.createSocket();
337
338 if (localSocket == null) {
339 throw new IOException("could not initialize ssl socket");
340 }
341
342 SSLSocketHelper.setSecurity((SSLSocket) localSocket);
343 SSLSocketHelper.setHostname((SSLSocket) localSocket, account.getServer());
344 SSLSocketHelper.setApplicationProtocol((SSLSocket) localSocket, "xmpp-client");
345
346 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
347
348 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), verifiedHostname, ((SSLSocket) localSocket).getSession())) {
349 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
350 if (!iterator.hasNext()) {
351 throw new StateChangingException(Account.State.TLS_ERROR);
352 }
353 }
354 }
355 if (startXmpp(localSocket)) {
356 if (!result.equals(storedBackupResult)) {
357 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
358 }
359 break; // successfully connected to server that speaks xmpp
360 } else {
361 localSocket.close();
362 if (!iterator.hasNext()) {
363 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
364 }
365 }
366 } catch (final StateChangingException e) {
367 throw e;
368 } catch (InterruptedException e) {
369 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
370 return;
371 } catch (final Throwable e) {
372 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
373 if (!iterator.hasNext()) {
374 throw new UnknownHostException();
375 }
376 }
377 }
378 }
379 processStream();
380 } catch (final SecurityException e) {
381 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
382 } catch (final StateChangingException e) {
383 this.changeStatus(e.state);
384 } catch (final UnknownHostException | ConnectException e) {
385 this.changeStatus(Account.State.SERVER_NOT_FOUND);
386 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
387 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
388 } catch (final IOException | XmlPullParserException e) {
389 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
390 this.changeStatus(Account.State.OFFLINE);
391 this.attempt = Math.max(0, this.attempt - 1);
392 } finally {
393 if (!Thread.currentThread().isInterrupted()) {
394 forceCloseSocket();
395 } else {
396 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
397 }
398 }
399 }
400
401 /**
402 * Starts xmpp protocol, call after connecting to socket
403 *
404 * @return true if server returns with valid xmpp, false otherwise
405 */
406 private boolean startXmpp(Socket socket) throws Exception {
407 if (Thread.currentThread().isInterrupted()) {
408 throw new InterruptedException();
409 }
410 this.socket = socket;
411 tagReader = new XmlReader();
412 if (tagWriter != null) {
413 tagWriter.forceClose();
414 }
415 tagWriter = new TagWriter();
416 tagWriter.setOutputStream(socket.getOutputStream());
417 tagReader.setInputStream(socket.getInputStream());
418 tagWriter.beginDocument();
419 sendStartStream();
420 final Tag tag = tagReader.readTag();
421 if (Thread.currentThread().isInterrupted()) {
422 throw new InterruptedException();
423 }
424 if (socket instanceof SSLSocket) {
425 SSLSocketHelper.log(account, (SSLSocket) socket);
426 }
427 return tag != null && tag.isStart("stream");
428 }
429
430 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
431 final SSLContext sc = SSLSocketHelper.getSSLContext();
432 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
433 KeyManager[] keyManager;
434 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
435 keyManager = new KeyManager[]{new MyKeyManager()};
436 } else {
437 keyManager = null;
438 }
439 String domain = account.getJid().getDomain();
440 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
441 final SSLSocketFactory factory = sc.getSocketFactory();
442 final DomainHostnameVerifier verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier(), mInteractive);
443 return new TlsFactoryVerifier(factory, verifier);
444 }
445
446 @Override
447 public void run() {
448 synchronized (this) {
449 this.mThread = Thread.currentThread();
450 if (this.mThread.isInterrupted()) {
451 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
452 return;
453 }
454 forceCloseSocket();
455 }
456 connect();
457 }
458
459 private void processStream() throws XmlPullParserException, IOException {
460 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
461 this.mStreamCountDownLatch = streamCountDownLatch;
462 Tag nextTag = tagReader.readTag();
463 while (nextTag != null && !nextTag.isEnd("stream")) {
464 if (nextTag.isStart("error")) {
465 processStreamError(nextTag);
466 } else if (nextTag.isStart("features")) {
467 processStreamFeatures(nextTag);
468 } else if (nextTag.isStart("proceed")) {
469 switchOverToTls();
470 } else if (nextTag.isStart("success")) {
471 final String challenge = tagReader.readElement(nextTag).getContent();
472 try {
473 saslMechanism.getResponse(challenge);
474 } catch (final SaslMechanism.AuthenticationException e) {
475 Log.e(Config.LOGTAG, String.valueOf(e));
476 throw new StateChangingException(Account.State.UNAUTHORIZED);
477 }
478 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in");
479 account.setKey(Account.PINNED_MECHANISM_KEY,
480 String.valueOf(saslMechanism.getPriority()));
481 tagReader.reset();
482 sendStartStream();
483 final Tag tag = tagReader.readTag();
484 if (tag != null && tag.isStart("stream")) {
485 processStream();
486 } else {
487 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
488 }
489 break;
490 } else if (nextTag.isStart("failure")) {
491 final Element failure = tagReader.readElement(nextTag);
492 if (Namespace.SASL.equals(failure.getNamespace())) {
493 final String text = failure.findChildContent("text");
494 if (failure.hasChild("account-disabled") && text != null) {
495 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
496 if (matcher.find()) {
497 try {
498 URL url = new URL(text.substring(matcher.start(), matcher.end()));
499 if (url.getProtocol().equals("https")) {
500 this.redirectionUrl = url;
501 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
502 }
503 } catch (MalformedURLException 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 int count = mSmCatchupMessageCounter.get();
594 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (" + count + ")");
595 accountUiNeedsRefresh = true;
596 if (count > 0) {
597 mXmppConnectionService.getNotificationService().finishBacklog(true, account);
598 }
599 }
600 }
601 if (accountUiNeedsRefresh) {
602 mXmppConnectionService.updateAccountUi();
603 }
604 final Element ack = tagReader.readElement(nextTag);
605 lastPacketReceived = SystemClock.elapsedRealtime();
606 try {
607 final boolean acknowledgedMessages;
608 synchronized (this.mStanzaQueue) {
609 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
610 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
611 }
612 if (acknowledgedMessages) {
613 mXmppConnectionService.updateConversationUi();
614 }
615 } catch (NumberFormatException | NullPointerException e) {
616 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
617 }
618 } else if (nextTag.isStart("failed")) {
619 Element failed = tagReader.readElement(nextTag);
620 try {
621 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
622 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
623 final boolean acknowledgedMessages;
624 synchronized (this.mStanzaQueue) {
625 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
626 }
627 if (acknowledgedMessages) {
628 mXmppConnectionService.updateConversationUi();
629 }
630 } catch (NumberFormatException | NullPointerException e) {
631 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
632 }
633 resetStreamId();
634 sendBindRequest();
635 } else if (nextTag.isStart("iq")) {
636 processIq(nextTag);
637 } else if (nextTag.isStart("message")) {
638 processMessage(nextTag);
639 } else if (nextTag.isStart("presence")) {
640 processPresence(nextTag);
641 }
642 nextTag = tagReader.readTag();
643 }
644 if (nextTag != null && nextTag.isEnd("stream")) {
645 streamCountDownLatch.countDown();
646 }
647 }
648
649 private boolean acknowledgeStanzaUpTo(int serverCount) {
650 if (serverCount > stanzasSent) {
651 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
652 }
653 boolean acknowledgedMessages = false;
654 for (int i = 0; i < mStanzaQueue.size(); ++i) {
655 if (serverCount >= mStanzaQueue.keyAt(i)) {
656 if (Config.EXTENDED_SM_LOGGING) {
657 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
658 }
659 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
660 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
661 MessagePacket packet = (MessagePacket) stanza;
662 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, packet.getId());
663 }
664 mStanzaQueue.removeAt(i);
665 i--;
666 }
667 }
668 return acknowledgedMessages;
669 }
670
671 private @NonNull
672 Element processPacket(final Tag currentTag, final int packetType) throws XmlPullParserException, IOException {
673 Element element;
674 switch (packetType) {
675 case PACKET_IQ:
676 element = new IqPacket();
677 break;
678 case PACKET_MESSAGE:
679 element = new MessagePacket();
680 break;
681 case PACKET_PRESENCE:
682 element = new PresencePacket();
683 break;
684 default:
685 throw new AssertionError("Should never encounter invalid type");
686 }
687 element.setAttributes(currentTag.getAttributes());
688 Tag nextTag = tagReader.readTag();
689 if (nextTag == null) {
690 throw new IOException("interrupted mid tag");
691 }
692 while (!nextTag.isEnd(element.getName())) {
693 if (!nextTag.isNo()) {
694 final Element child = tagReader.readElement(nextTag);
695 final String type = currentTag.getAttribute("type");
696 if (packetType == PACKET_IQ
697 && "jingle".equals(child.getName())
698 && ("set".equalsIgnoreCase(type) || "get"
699 .equalsIgnoreCase(type))) {
700 element = new JinglePacket();
701 element.setAttributes(currentTag.getAttributes());
702 }
703 element.addChild(child);
704 }
705 nextTag = tagReader.readTag();
706 if (nextTag == null) {
707 throw new IOException("interrupted mid tag");
708 }
709 }
710 if (stanzasReceived == Integer.MAX_VALUE) {
711 resetStreamId();
712 throw new IOException("time to restart the session. cant handle >2 billion pcks");
713 }
714 if (inSmacksSession) {
715 ++stanzasReceived;
716 } else if (features.sm()) {
717 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
718 }
719 lastPacketReceived = SystemClock.elapsedRealtime();
720 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
721 Log.d(Config.LOGTAG, "[background stanza] " + element);
722 }
723 return element;
724 }
725
726 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
727 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
728 if (!packet.valid()) {
729 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
730 return;
731 }
732 if (packet instanceof JinglePacket) {
733 if (this.jingleListener != null) {
734 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
735 }
736 } else {
737 OnIqPacketReceived callback = null;
738 synchronized (this.packetCallbacks) {
739 if (packetCallbacks.containsKey(packet.getId())) {
740 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
741 // Packets to the server should have responses from the server
742 if (packetCallbackDuple.first.toServer(account)) {
743 if (packet.fromServer(account)) {
744 callback = packetCallbackDuple.second;
745 packetCallbacks.remove(packet.getId());
746 } else {
747 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
748 }
749 } else {
750 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
751 callback = packetCallbackDuple.second;
752 packetCallbacks.remove(packet.getId());
753 } else {
754 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
755 }
756 }
757 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
758 callback = this.unregisteredIqListener;
759 }
760 }
761 if (callback != null) {
762 try {
763 callback.onIqPacketReceived(account, packet);
764 } catch (StateChangingError error) {
765 throw new StateChangingException(error.state);
766 }
767 }
768 }
769 }
770
771 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
772 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
773 if (!packet.valid()) {
774 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
775 return;
776 }
777 this.messageListener.onMessagePacketReceived(account, packet);
778 }
779
780 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
781 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
782 if (!packet.valid()) {
783 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
784 return;
785 }
786 this.presenceListener.onPresencePacketReceived(account, packet);
787 }
788
789 private void sendStartTLS() throws IOException {
790 final Tag startTLS = Tag.empty("starttls");
791 startTLS.setAttribute("xmlns", Namespace.TLS);
792 tagWriter.writeTag(startTLS);
793 }
794
795 private void switchOverToTls() throws XmlPullParserException, IOException {
796 tagReader.readTag();
797 try {
798 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
799 final InetAddress address = socket == null ? null : socket.getInetAddress();
800
801 if (address == null) {
802 throw new IOException("could not setup ssl");
803 }
804
805 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
806
807
808 if (sslSocket == null) {
809 throw new IOException("could not initialize ssl socket");
810 }
811
812 SSLSocketHelper.setSecurity(sslSocket);
813 SSLSocketHelper.setHostname(sslSocket, account.getServer());
814 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
815
816 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
817 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
818 throw new StateChangingException(Account.State.TLS_ERROR);
819 }
820 tagReader.setInputStream(sslSocket.getInputStream());
821 tagWriter.setOutputStream(sslSocket.getOutputStream());
822 sendStartStream();
823 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
824 features.encryptionEnabled = true;
825 final Tag tag = tagReader.readTag();
826 if (tag != null && tag.isStart("stream")) {
827 SSLSocketHelper.log(account, sslSocket);
828 processStream();
829 } else {
830 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
831 }
832 sslSocket.close();
833 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
834 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
835 throw new StateChangingException(Account.State.TLS_ERROR);
836 }
837 }
838
839 private void processStreamFeatures(final Tag currentTag) throws XmlPullParserException, IOException {
840 this.streamFeatures = tagReader.readElement(currentTag);
841 final boolean isSecure = features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS;
842 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
843 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
844 sendStartTLS();
845 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
846 if (isSecure) {
847 sendRegistryRequest();
848 } else {
849 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
850 }
851 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
852 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
853 } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && isSecure) {
854 authenticate();
855 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
856 if (Config.EXTENDED_SM_LOGGING) {
857 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resuming after stanza #" + stanzasReceived);
858 }
859 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
860 this.mSmCatchupMessageCounter.set(0);
861 this.mWaitingForSmCatchup.set(true);
862 this.tagWriter.writeStanzaAsync(resume);
863 } else if (needsBinding) {
864 if (this.streamFeatures.hasChild("bind") && isSecure) {
865 sendBindRequest();
866 } else {
867 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
868 }
869 }
870 }
871
872 private void authenticate() throws IOException {
873 final List<String> mechanisms = extractMechanisms(streamFeatures
874 .findChild("mechanisms"));
875 final Element auth = new Element("auth", Namespace.SASL);
876 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
877 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
878 } else if (mechanisms.contains("SCRAM-SHA-256")) {
879 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
880 } else if (mechanisms.contains("SCRAM-SHA-1")) {
881 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
882 } else if (mechanisms.contains("PLAIN") && !account.getJid().getDomain().equals("nimbuzz.com")) {
883 saslMechanism = new Plain(tagWriter, account);
884 } else if (mechanisms.contains("DIGEST-MD5")) {
885 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
886 } else if (mechanisms.contains("ANONYMOUS")) {
887 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
888 }
889 if (saslMechanism != null) {
890 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
891 if (pinnedMechanism > saslMechanism.getPriority()) {
892 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
893 " has lower priority (" + String.valueOf(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 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
906 }
907 }
908
909 private List<String> extractMechanisms(final Element stream) {
910 final ArrayList<String> mechanisms = new ArrayList<>(stream
911 .getChildren().size());
912 for (final Element child : stream.getChildren()) {
913 mechanisms.add(child.getContent());
914 }
915 return mechanisms;
916 }
917
918 private void sendRegistryRequest() {
919 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
920 register.query("jabber:iq:register");
921 register.setTo(Jid.of(account.getServer()));
922 sendUnmodifiedIqPacket(register, (account, packet) -> {
923 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
924 return;
925 }
926 if (packet.getType() == IqPacket.TYPE.ERROR) {
927 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
928 }
929 final Element query = packet.query("jabber:iq:register");
930 if (query.hasChild("username") && (query.hasChild("password"))) {
931 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
932 final Element username = new Element("username").setContent(account.getUsername());
933 final Element password = new Element("password").setContent(account.getPassword());
934 register1.query("jabber:iq:register").addChild(username);
935 register1.query().addChild(password);
936 register1.setFrom(account.getJid().asBareJid());
937 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
938 } else if (query.hasChild("x", Namespace.DATA)) {
939 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
940 final Element blob = query.findChild("data", "urn:xmpp:bob");
941 final String id = packet.getId();
942 InputStream is;
943 if (blob != null) {
944 try {
945 final String base64Blob = blob.getContent();
946 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
947 is = new ByteArrayInputStream(strBlob);
948 } catch (Exception e) {
949 is = null;
950 }
951 } else {
952 try {
953 Field field = data.getFieldByName("url");
954 URL url = field != null && field.getValue() != null ? new URL(field.getValue()) : null;
955 is = url != null ? url.openStream() : null;
956 } catch (IOException e) {
957 is = null;
958 }
959 }
960
961 if (is != null) {
962 Bitmap captcha = BitmapFactory.decodeStream(is);
963 try {
964 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
965 return;
966 }
967 } catch (Exception e) {
968 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
969 }
970 }
971 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
972 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
973 final String instructions = query.findChildContent("instructions");
974 final Element oob = query.findChild("x", Namespace.OOB);
975 final String url = oob == null ? null : oob.findChildContent("url");
976 if (url != null) {
977 setAccountCreationFailed(url);
978 } else if (instructions != null) {
979 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
980 if (matcher.find()) {
981 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
982 }
983 }
984 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
985 }
986 }, true);
987 }
988
989 private void setAccountCreationFailed(String url) {
990 if (url != null) {
991 try {
992 this.redirectionUrl = new URL(url);
993 if (this.redirectionUrl.getProtocol().equals("https")) {
994 throw new StateChangingError(Account.State.REGISTRATION_WEB);
995 }
996 } catch (MalformedURLException e) {
997 //fall through
998 }
999 }
1000 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1001 }
1002
1003 public URL getRedirectionUrl() {
1004 return this.redirectionUrl;
1005 }
1006
1007 public void resetEverything() {
1008 resetAttemptCount(true);
1009 resetStreamId();
1010 clearIqCallbacks();
1011 this.stanzasSent = 0;
1012 mStanzaQueue.clear();
1013 this.redirectionUrl = null;
1014 synchronized (this.disco) {
1015 disco.clear();
1016 }
1017 }
1018
1019 private void sendBindRequest() {
1020 try {
1021 mXmppConnectionService.restoredFromDatabaseLatch.await();
1022 } catch (InterruptedException e) {
1023 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1024 return;
1025 }
1026 clearIqCallbacks();
1027 if (account.getJid().isBareJid()) {
1028 account.setResource(this.createNewResource());
1029 } else {
1030 fixResource(mXmppConnectionService, account);
1031 }
1032 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1033 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1034 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1035 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1036 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1037 return;
1038 }
1039 final Element bind = packet.findChild("bind");
1040 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1041 isBound = true;
1042 final Element jid = bind.findChild("jid");
1043 if (jid != null && jid.getContent() != null) {
1044 try {
1045 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1046 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1047 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1048 throw new StateChangingError(Account.State.BIND_FAILURE);
1049 }
1050 if (account.setJid(assignedJid)) {
1051 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1052 mXmppConnectionService.databaseBackend.updateAccount(account);
1053 }
1054 if (streamFeatures.hasChild("session")
1055 && !streamFeatures.findChild("session").hasChild("optional")) {
1056 sendStartSession();
1057 } else {
1058 sendPostBindInitialization();
1059 }
1060 return;
1061 } catch (final IllegalArgumentException e) {
1062 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1063 }
1064 } else {
1065 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1066 }
1067 } else {
1068 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1069 }
1070 final Element error = packet.findChild("error");
1071 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1072 account.setResource(createNewResource());
1073 }
1074 throw new StateChangingError(Account.State.BIND_FAILURE);
1075 }, true);
1076 }
1077
1078 private void clearIqCallbacks() {
1079 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1080 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1081 synchronized (this.packetCallbacks) {
1082 if (this.packetCallbacks.size() == 0) {
1083 return;
1084 }
1085 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1086 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1087 while (iterator.hasNext()) {
1088 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1089 callbacks.add(entry.second);
1090 iterator.remove();
1091 }
1092 }
1093 for (OnIqPacketReceived callback : callbacks) {
1094 try {
1095 callback.onIqPacketReceived(account, failurePacket);
1096 } catch (StateChangingError error) {
1097 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1098 //ignore
1099 }
1100 }
1101 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1102 }
1103
1104 public void sendDiscoTimeout() {
1105 if (mWaitForDisco.compareAndSet(true, false)) {
1106 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1107 finalizeBind();
1108 }
1109 }
1110
1111 private void sendStartSession() {
1112 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1113 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1114 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1115 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1116 if (packet.getType() == IqPacket.TYPE.RESULT) {
1117 sendPostBindInitialization();
1118 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1119 throw new StateChangingError(Account.State.SESSION_FAILURE);
1120 }
1121 }, true);
1122 }
1123
1124 private void sendPostBindInitialization() {
1125 smVersion = 0;
1126 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1127 smVersion = 3;
1128 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1129 smVersion = 2;
1130 }
1131 if (smVersion != 0) {
1132 synchronized (this.mStanzaQueue) {
1133 final EnablePacket enable = new EnablePacket(smVersion);
1134 tagWriter.writeStanzaAsync(enable);
1135 stanzasSent = 0;
1136 mStanzaQueue.clear();
1137 }
1138 }
1139 features.carbonsEnabled = false;
1140 features.blockListRequested = false;
1141 synchronized (this.disco) {
1142 this.disco.clear();
1143 }
1144 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1145 mPendingServiceDiscoveries.set(0);
1146 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain())) {
1147 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1148 mWaitForDisco.set(false);
1149 } else {
1150 mWaitForDisco.set(true);
1151 }
1152 lastDiscoStarted = SystemClock.elapsedRealtime();
1153 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1154 Element caps = streamFeatures.findChild("c");
1155 final String hash = caps == null ? null : caps.getAttribute("hash");
1156 final String ver = caps == null ? null : caps.getAttribute("ver");
1157 ServiceDiscoveryResult discoveryResult = null;
1158 if (hash != null && ver != null) {
1159 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1160 }
1161 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1162 if (requestDiscoItemsFirst) {
1163 sendServiceDiscoveryItems(Jid.of(account.getServer()));
1164 }
1165 if (discoveryResult == null) {
1166 sendServiceDiscoveryInfo(Jid.of(account.getServer()));
1167 } else {
1168 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1169 disco.put(Jid.of(account.getServer()), discoveryResult);
1170 }
1171 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1172 if (!requestDiscoItemsFirst) {
1173 sendServiceDiscoveryItems(Jid.of(account.getServer()));
1174 }
1175
1176 if (!mWaitForDisco.get()) {
1177 finalizeBind();
1178 }
1179 this.lastSessionStarted = SystemClock.elapsedRealtime();
1180 }
1181
1182 private void sendServiceDiscoveryInfo(final Jid jid) {
1183 mPendingServiceDiscoveries.incrementAndGet();
1184 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1185 iq.setTo(jid);
1186 iq.query("http://jabber.org/protocol/disco#info");
1187 this.sendIqPacket(iq, (account, packet) -> {
1188 if (packet.getType() == IqPacket.TYPE.RESULT) {
1189 boolean advancedStreamFeaturesLoaded;
1190 synchronized (XmppConnection.this.disco) {
1191 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1192 if (jid.equals(Jid.of(account.getServer()))) {
1193 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1194 }
1195 disco.put(jid, result);
1196 advancedStreamFeaturesLoaded = disco.containsKey(Jid.of(account.getServer()))
1197 && disco.containsKey(account.getJid().asBareJid());
1198 }
1199 if (advancedStreamFeaturesLoaded && (jid.equals(Jid.of(account.getServer())) || jid.equals(account.getJid().asBareJid()))) {
1200 enableAdvancedStreamFeatures();
1201 }
1202 } else {
1203 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1204 }
1205 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1206 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1207 && mWaitForDisco.compareAndSet(true, false)) {
1208 finalizeBind();
1209 }
1210 }
1211 });
1212 }
1213
1214 private void finalizeBind() {
1215 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1216 if (bindListener != null) {
1217 bindListener.onBind(account);
1218 }
1219 changeStatus(Account.State.ONLINE);
1220 }
1221
1222 private void enableAdvancedStreamFeatures() {
1223 if (getFeatures().carbons() && !features.carbonsEnabled) {
1224 sendEnableCarbons();
1225 }
1226 if (getFeatures().blocking() && !features.blockListRequested) {
1227 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1228 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1229 }
1230 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1231 listener.onAdvancedStreamFeaturesAvailable(account);
1232 }
1233 }
1234
1235 private void sendServiceDiscoveryItems(final Jid server) {
1236 mPendingServiceDiscoveries.incrementAndGet();
1237 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1238 iq.setTo(Jid.ofDomain(server.getDomain()));
1239 iq.query("http://jabber.org/protocol/disco#items");
1240 this.sendIqPacket(iq, (account, packet) -> {
1241 if (packet.getType() == IqPacket.TYPE.RESULT) {
1242 HashSet<Jid> items = new HashSet<Jid>();
1243 final List<Element> elements = packet.query().getChildren();
1244 for (final Element element : elements) {
1245 if (element.getName().equals("item")) {
1246 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1247 if (jid != null && !jid.equals(Jid.of(account.getServer()))) {
1248 items.add(jid);
1249 }
1250 }
1251 }
1252 for (Jid jid : items) {
1253 sendServiceDiscoveryInfo(jid);
1254 }
1255 } else {
1256 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1257 }
1258 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1259 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1260 && mWaitForDisco.compareAndSet(true, false)) {
1261 finalizeBind();
1262 }
1263 }
1264 });
1265 }
1266
1267 private void sendEnableCarbons() {
1268 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1269 iq.addChild("enable", "urn:xmpp:carbons:2");
1270 this.sendIqPacket(iq, new OnIqPacketReceived() {
1271
1272 @Override
1273 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1274 if (!packet.hasChild("error")) {
1275 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1276 + ": successfully enabled carbons");
1277 features.carbonsEnabled = true;
1278 } else {
1279 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1280 + ": error enableing carbons " + packet.toString());
1281 }
1282 }
1283 });
1284 }
1285
1286 private void processStreamError(final Tag currentTag) throws XmlPullParserException, IOException {
1287 final Element streamError = tagReader.readElement(currentTag);
1288 if (streamError == null) {
1289 return;
1290 }
1291 if (streamError.hasChild("conflict")) {
1292 account.setResource(createNewResource());
1293 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1294 throw new IOException();
1295 } else if (streamError.hasChild("host-unknown")) {
1296 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1297 } else if (streamError.hasChild("policy-violation")) {
1298 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1299 } else {
1300 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString());
1301 throw new StateChangingException(Account.State.STREAM_ERROR);
1302 }
1303 }
1304
1305 private void sendStartStream() throws IOException {
1306 final Tag stream = Tag.start("stream:stream");
1307 stream.setAttribute("to", account.getServer());
1308 stream.setAttribute("version", "1.0");
1309 stream.setAttribute("xml:lang", "en");
1310 stream.setAttribute("xmlns", "jabber:client");
1311 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1312 tagWriter.writeTag(stream);
1313 }
1314
1315 private String createNewResource() {
1316 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1317 }
1318
1319 private String nextRandomId() {
1320 return nextRandomId(false);
1321 }
1322
1323 private String nextRandomId(boolean s) {
1324 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1325 }
1326
1327 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1328 packet.setFrom(account.getJid());
1329 return this.sendUnmodifiedIqPacket(packet, callback, false);
1330 }
1331
1332 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1333 if (packet.getId() == null) {
1334 packet.setAttribute("id", nextRandomId());
1335 }
1336 if (callback != null) {
1337 synchronized (this.packetCallbacks) {
1338 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1339 }
1340 }
1341 this.sendPacket(packet, force);
1342 return packet.getId();
1343 }
1344
1345 public void sendMessagePacket(final MessagePacket packet) {
1346 this.sendPacket(packet);
1347 }
1348
1349 public void sendPresencePacket(final PresencePacket packet) {
1350 this.sendPacket(packet);
1351 }
1352
1353 private synchronized void sendPacket(final AbstractStanza packet) {
1354 sendPacket(packet, false);
1355 }
1356
1357 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1358 if (stanzasSent == Integer.MAX_VALUE) {
1359 resetStreamId();
1360 disconnect(true);
1361 return;
1362 }
1363 synchronized (this.mStanzaQueue) {
1364 if (force || isBound) {
1365 tagWriter.writeStanzaAsync(packet);
1366 } else {
1367 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1368 }
1369 if (packet instanceof AbstractAcknowledgeableStanza) {
1370 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1371
1372 if (this.mStanzaQueue.size() != 0) {
1373 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1374 if (currentHighestKey != stanzasSent) {
1375 throw new AssertionError("Stanza count messed up");
1376 }
1377 }
1378
1379 ++stanzasSent;
1380 this.mStanzaQueue.append(stanzasSent, stanza);
1381 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1382 if (Config.EXTENDED_SM_LOGGING) {
1383 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1384 }
1385 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1386 }
1387 }
1388 }
1389 }
1390
1391 public void sendPing() {
1392 if (!r()) {
1393 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1394 iq.setFrom(account.getJid());
1395 iq.addChild("ping", "urn:xmpp:ping");
1396 this.sendIqPacket(iq, null);
1397 }
1398 this.lastPingSent = SystemClock.elapsedRealtime();
1399 }
1400
1401 public void setOnMessagePacketReceivedListener(
1402 final OnMessagePacketReceived listener) {
1403 this.messageListener = listener;
1404 }
1405
1406 public void setOnUnregisteredIqPacketReceivedListener(
1407 final OnIqPacketReceived listener) {
1408 this.unregisteredIqListener = listener;
1409 }
1410
1411 public void setOnPresencePacketReceivedListener(
1412 final OnPresencePacketReceived listener) {
1413 this.presenceListener = listener;
1414 }
1415
1416 public void setOnJinglePacketReceivedListener(
1417 final OnJinglePacketReceived listener) {
1418 this.jingleListener = listener;
1419 }
1420
1421 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1422 this.statusListener = listener;
1423 }
1424
1425 public void setOnBindListener(final OnBindListener listener) {
1426 this.bindListener = listener;
1427 }
1428
1429 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1430 this.acknowledgedListener = listener;
1431 }
1432
1433 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1434 this.advancedStreamFeaturesLoadedListeners.add(listener);
1435 }
1436
1437 private void forceCloseSocket() {
1438 if (socket != null) {
1439 try {
1440 socket.close();
1441 } catch (IOException e) {
1442 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception " + e.getMessage() + " during force close");
1443 }
1444 } else {
1445 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": socket was null during force close");
1446 }
1447 }
1448
1449 public void interrupt() {
1450 if (this.mThread != null) {
1451 this.mThread.interrupt();
1452 }
1453 }
1454
1455 public void disconnect(final boolean force) {
1456 interrupt();
1457 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + Boolean.toString(force));
1458 if (force) {
1459 forceCloseSocket();
1460 } else {
1461 final TagWriter currentTagWriter = this.tagWriter;
1462 if (currentTagWriter.isActive()) {
1463 currentTagWriter.finish();
1464 final Socket currentSocket = this.socket;
1465 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1466 try {
1467 currentTagWriter.await(1, TimeUnit.SECONDS);
1468 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1469 currentTagWriter.writeTag(Tag.end("stream:stream"));
1470 if (streamCountDownLatch != null) {
1471 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1472 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1473 } else {
1474 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1475 }
1476 }
1477 } catch (InterruptedException e) {
1478 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1479 } catch (final IOException e) {
1480 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1481 } finally {
1482 FileBackend.close(currentSocket);
1483 }
1484 } else {
1485 forceCloseSocket();
1486 }
1487 }
1488 }
1489
1490 private void resetStreamId() {
1491 this.streamId = null;
1492 }
1493
1494 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1495 synchronized (this.disco) {
1496 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1497 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1498 if (cursor.getValue().getFeatures().contains(feature)) {
1499 items.add(cursor);
1500 }
1501 }
1502 return items;
1503 }
1504 }
1505
1506 public Jid findDiscoItemByFeature(final String feature) {
1507 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1508 if (items.size() >= 1) {
1509 return items.get(0).getKey();
1510 }
1511 return null;
1512 }
1513
1514 public boolean r() {
1515 if (getFeatures().sm()) {
1516 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1517 return true;
1518 } else {
1519 return false;
1520 }
1521 }
1522
1523 public List<String> getMucServersWithholdAccount() {
1524 List<String> servers = getMucServers();
1525 servers.remove(account.getServer());
1526 return servers;
1527 }
1528
1529 public List<String> getMucServers() {
1530 List<String> servers = new ArrayList<>();
1531 synchronized (this.disco) {
1532 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1533 final ServiceDiscoveryResult value = cursor.getValue();
1534 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1535 && value.hasIdentity("conference", "text")
1536 && !value.getFeatures().contains("jabber:iq:gateway")
1537 && !value.hasIdentity("conference", "irc")) {
1538 servers.add(cursor.getKey().toString());
1539 }
1540 }
1541 }
1542 return servers;
1543 }
1544
1545 public String getMucServer() {
1546 List<String> servers = getMucServers();
1547 return servers.size() > 0 ? servers.get(0) : null;
1548 }
1549
1550 public int getTimeToNextAttempt() {
1551 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1552 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1553 return interval - secondsSinceLast;
1554 }
1555
1556 public int getAttempt() {
1557 return this.attempt;
1558 }
1559
1560 public Features getFeatures() {
1561 return this.features;
1562 }
1563
1564 public long getLastSessionEstablished() {
1565 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1566 return System.currentTimeMillis() - diff;
1567 }
1568
1569 public long getLastConnect() {
1570 return this.lastConnect;
1571 }
1572
1573 public long getLastPingSent() {
1574 return this.lastPingSent;
1575 }
1576
1577 public long getLastDiscoStarted() {
1578 return this.lastDiscoStarted;
1579 }
1580
1581 public long getLastPacketReceived() {
1582 return this.lastPacketReceived;
1583 }
1584
1585 public void sendActive() {
1586 this.sendPacket(new ActivePacket());
1587 }
1588
1589 public void sendInactive() {
1590 this.sendPacket(new InactivePacket());
1591 }
1592
1593 public void resetAttemptCount(boolean resetConnectTime) {
1594 this.attempt = 0;
1595 if (resetConnectTime) {
1596 this.lastConnect = 0;
1597 }
1598 }
1599
1600 public void setInteractive(boolean interactive) {
1601 this.mInteractive = interactive;
1602 }
1603
1604 public Identity getServerIdentity() {
1605 synchronized (this.disco) {
1606 ServiceDiscoveryResult result = disco.get(Jid.ofDomain(account.getJid().getDomain()));
1607 if (result == null) {
1608 return Identity.UNKNOWN;
1609 }
1610 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1611 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1612 switch (id.getName()) {
1613 case "Prosody":
1614 return Identity.PROSODY;
1615 case "ejabberd":
1616 return Identity.EJABBERD;
1617 case "Slack-XMPP":
1618 return Identity.SLACK;
1619 }
1620 }
1621 }
1622 }
1623 return Identity.UNKNOWN;
1624 }
1625
1626 private IqGenerator getIqGenerator() {
1627 return mXmppConnectionService.getIqGenerator();
1628 }
1629
1630 public enum Identity {
1631 FACEBOOK,
1632 SLACK,
1633 EJABBERD,
1634 PROSODY,
1635 NIMBUZZ,
1636 UNKNOWN
1637 }
1638
1639 private static class TlsFactoryVerifier {
1640 private final SSLSocketFactory factory;
1641 private final DomainHostnameVerifier verifier;
1642
1643 TlsFactoryVerifier(final SSLSocketFactory factory, final DomainHostnameVerifier verifier) throws IOException {
1644 this.factory = factory;
1645 this.verifier = verifier;
1646 if (factory == null || verifier == null) {
1647 throw new IOException("could not setup ssl");
1648 }
1649 }
1650 }
1651
1652 private class MyKeyManager implements X509KeyManager {
1653 @Override
1654 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1655 return account.getPrivateKeyAlias();
1656 }
1657
1658 @Override
1659 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1660 return null;
1661 }
1662
1663 @Override
1664 public X509Certificate[] getCertificateChain(String alias) {
1665 Log.d(Config.LOGTAG, "getting certificate chain");
1666 try {
1667 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1668 } catch (Exception e) {
1669 Log.d(Config.LOGTAG, e.getMessage());
1670 return new X509Certificate[0];
1671 }
1672 }
1673
1674 @Override
1675 public String[] getClientAliases(String s, Principal[] principals) {
1676 final String alias = account.getPrivateKeyAlias();
1677 return alias != null ? new String[]{alias} : new String[0];
1678 }
1679
1680 @Override
1681 public String[] getServerAliases(String s, Principal[] principals) {
1682 return new String[0];
1683 }
1684
1685 @Override
1686 public PrivateKey getPrivateKey(String alias) {
1687 try {
1688 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1689 } catch (Exception e) {
1690 return null;
1691 }
1692 }
1693 }
1694
1695 private class StateChangingError extends Error {
1696 private final Account.State state;
1697
1698 public StateChangingError(Account.State state) {
1699 this.state = state;
1700 }
1701 }
1702
1703 private class StateChangingException extends IOException {
1704 private final Account.State state;
1705
1706 public StateChangingException(Account.State state) {
1707 this.state = state;
1708 }
1709 }
1710
1711 public class Features {
1712 XmppConnection connection;
1713 private boolean carbonsEnabled = false;
1714 private boolean encryptionEnabled = false;
1715 private boolean blockListRequested = false;
1716
1717 public Features(final XmppConnection connection) {
1718 this.connection = connection;
1719 }
1720
1721 private boolean hasDiscoFeature(final Jid server, final String feature) {
1722 synchronized (XmppConnection.this.disco) {
1723 return connection.disco.containsKey(server) &&
1724 connection.disco.get(server).getFeatures().contains(feature);
1725 }
1726 }
1727
1728 public boolean carbons() {
1729 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:carbons:2");
1730 }
1731
1732 public boolean bookmarksConversion() {
1733 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1734 }
1735
1736 public boolean blocking() {
1737 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.BLOCKING);
1738 }
1739
1740 public boolean spamReporting() {
1741 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:reporting:reason:spam:0");
1742 }
1743
1744 public boolean flexibleOfflineMessageRetrieval() {
1745 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1746 }
1747
1748 public boolean register() {
1749 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.REGISTER);
1750 }
1751
1752 public boolean sm() {
1753 return streamId != null
1754 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1755 }
1756
1757 public boolean csi() {
1758 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1759 }
1760
1761 public boolean pep() {
1762 synchronized (XmppConnection.this.disco) {
1763 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1764 return info != null && info.hasIdentity("pubsub", "pep");
1765 }
1766 }
1767
1768 public boolean pepPersistent() {
1769 synchronized (XmppConnection.this.disco) {
1770 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1771 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1772 }
1773 }
1774
1775 public boolean pepPublishOptions() {
1776 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1777 }
1778
1779 public boolean pepOmemoWhitelisted() {
1780 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1781 }
1782
1783 public boolean mam() {
1784 return MessageArchiveService.Version.has(getAccountFeatures());
1785 }
1786
1787 public List<String> getAccountFeatures() {
1788 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1789 return result == null ? Collections.emptyList() : result.getFeatures();
1790 }
1791
1792 public boolean push() {
1793 return hasDiscoFeature(account.getJid().asBareJid(), "urn:xmpp:push:0")
1794 || hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:push:0");
1795 }
1796
1797 public boolean rosterVersioning() {
1798 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1799 }
1800
1801 public void setBlockListRequested(boolean value) {
1802 this.blockListRequested = value;
1803 }
1804
1805 public boolean p1S3FileTransfer() {
1806 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.P1_S3_FILE_TRANSFER);
1807 }
1808
1809 public boolean httpUpload(long filesize) {
1810 if (Config.DISABLE_HTTP_UPLOAD) {
1811 return false;
1812 } else {
1813 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1814 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1815 if (items.size() > 0) {
1816 try {
1817 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1818 if (filesize <= maxsize) {
1819 return true;
1820 } else {
1821 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
1822 return false;
1823 }
1824 } catch (Exception e) {
1825 return true;
1826 }
1827 }
1828 }
1829 return false;
1830 }
1831 }
1832
1833 public boolean useLegacyHttpUpload() {
1834 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
1835 }
1836
1837 public long getMaxHttpUploadSize() {
1838 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1839 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1840 if (items.size() > 0) {
1841 try {
1842 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1843 } catch (Exception e) {
1844 //ignored
1845 }
1846 }
1847 }
1848 return -1;
1849 }
1850
1851 public boolean stanzaIds() {
1852 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
1853 }
1854 }
1855}