1package eu.siacs.conversations.xmpp;
2
3import android.graphics.Bitmap;
4import android.graphics.BitmapFactory;
5import android.os.Bundle;
6import android.os.Parcelable;
7import android.os.PowerManager;
8import android.os.PowerManager.WakeLock;
9import android.os.SystemClock;
10import android.security.KeyChain;
11import android.util.Base64;
12import android.util.Log;
13import android.util.Pair;
14import android.util.SparseArray;
15
16import org.json.JSONException;
17import org.json.JSONObject;
18import org.xmlpull.v1.XmlPullParserException;
19
20import java.io.ByteArrayInputStream;
21import java.io.IOException;
22import java.io.InputStream;
23import java.math.BigInteger;
24import java.net.ConnectException;
25import java.net.IDN;
26import java.net.InetAddress;
27import java.net.InetSocketAddress;
28import java.net.Socket;
29import java.net.UnknownHostException;
30import java.net.URL;
31import java.security.KeyManagementException;
32import java.security.NoSuchAlgorithmException;
33import java.security.Principal;
34import java.security.PrivateKey;
35import java.security.cert.X509Certificate;
36import java.util.ArrayList;
37import java.util.Arrays;
38import java.util.HashMap;
39import java.util.Hashtable;
40import java.util.Iterator;
41import java.util.List;
42import java.util.Map.Entry;
43import java.util.concurrent.atomic.AtomicBoolean;
44import java.util.concurrent.atomic.AtomicInteger;
45
46import javax.net.ssl.HostnameVerifier;
47import javax.net.ssl.KeyManager;
48import javax.net.ssl.SSLContext;
49import javax.net.ssl.SSLSession;
50import javax.net.ssl.SSLSocket;
51import javax.net.ssl.SSLSocketFactory;
52import javax.net.ssl.X509KeyManager;
53import javax.net.ssl.X509TrustManager;
54
55import de.duenndns.ssl.MemorizingTrustManager;
56import eu.siacs.conversations.Config;
57import eu.siacs.conversations.crypto.XmppDomainVerifier;
58import eu.siacs.conversations.crypto.sasl.Anonymous;
59import eu.siacs.conversations.crypto.sasl.DigestMd5;
60import eu.siacs.conversations.crypto.sasl.External;
61import eu.siacs.conversations.crypto.sasl.Plain;
62import eu.siacs.conversations.crypto.sasl.SaslMechanism;
63import eu.siacs.conversations.crypto.sasl.ScramSha1;
64import eu.siacs.conversations.entities.Account;
65import eu.siacs.conversations.entities.Message;
66import eu.siacs.conversations.entities.ServiceDiscoveryResult;
67import eu.siacs.conversations.generator.IqGenerator;
68import eu.siacs.conversations.services.XmppConnectionService;
69import eu.siacs.conversations.utils.DNSHelper;
70import eu.siacs.conversations.utils.SSLSocketHelper;
71import eu.siacs.conversations.utils.SocksSocketFactory;
72import eu.siacs.conversations.utils.Xmlns;
73import eu.siacs.conversations.xml.Element;
74import eu.siacs.conversations.xml.Tag;
75import eu.siacs.conversations.xml.TagWriter;
76import eu.siacs.conversations.xml.XmlReader;
77import eu.siacs.conversations.xmpp.forms.Data;
78import eu.siacs.conversations.xmpp.forms.Field;
79import eu.siacs.conversations.xmpp.jid.InvalidJidException;
80import eu.siacs.conversations.xmpp.jid.Jid;
81import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
82import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
83import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
84import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
85import eu.siacs.conversations.xmpp.stanzas.IqPacket;
86import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
87import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
88import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
89import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
90import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
91import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
92import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
93import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
94
95public class XmppConnection implements Runnable {
96
97 private static final int PACKET_IQ = 0;
98 private static final int PACKET_MESSAGE = 1;
99 private static final int PACKET_PRESENCE = 2;
100 protected Account account;
101 private final WakeLock wakeLock;
102 private Socket socket;
103 private XmlReader tagReader;
104 private TagWriter tagWriter;
105 private final Features features = new Features(this);
106 private boolean needsBinding = true;
107 private boolean shouldAuthenticate = true;
108 private Element streamFeatures;
109 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
110
111 private String streamId = null;
112 private int smVersion = 3;
113 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
114
115 private int stanzasReceived = 0;
116 private int stanzasSent = 0;
117 private long lastPacketReceived = 0;
118 private long lastPingSent = 0;
119 private long lastConnect = 0;
120 private long lastSessionStarted = 0;
121 private long lastDiscoStarted = 0;
122 private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
123 private AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
124 private boolean mInteractive = false;
125 private int attempt = 0;
126 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
127 private OnPresencePacketReceived presenceListener = null;
128 private OnJinglePacketReceived jingleListener = null;
129 private OnIqPacketReceived unregisteredIqListener = null;
130 private OnMessagePacketReceived messageListener = null;
131 private OnStatusChanged statusListener = null;
132 private OnBindListener bindListener = null;
133 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
134 private OnMessageAcknowledged acknowledgedListener = null;
135 private XmppConnectionService mXmppConnectionService = null;
136
137 private SaslMechanism saslMechanism;
138
139 private class MyKeyManager implements X509KeyManager {
140 @Override
141 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
142 return account.getPrivateKeyAlias();
143 }
144
145 @Override
146 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
147 return null;
148 }
149
150 @Override
151 public X509Certificate[] getCertificateChain(String alias) {
152 Log.d(Config.LOGTAG,"getting certificate chain");
153 try {
154 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
155 } catch (Exception e) {
156 Log.d(Config.LOGTAG,e.getMessage());
157 return new X509Certificate[0];
158 }
159 }
160
161 @Override
162 public String[] getClientAliases(String s, Principal[] principals) {
163 return new String[0];
164 }
165
166 @Override
167 public String[] getServerAliases(String s, Principal[] principals) {
168 return new String[0];
169 }
170
171 @Override
172 public PrivateKey getPrivateKey(String alias) {
173 try {
174 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
175 } catch (Exception e) {
176 return null;
177 }
178 }
179 }
180
181 public final OnIqPacketReceived registrationResponseListener = new OnIqPacketReceived() {
182 @Override
183 public void onIqPacketReceived(Account account, IqPacket packet) {
184 if (packet.getType() == IqPacket.TYPE.RESULT) {
185 account.setOption(Account.OPTION_REGISTER, false);
186 forceCloseSocket();
187 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
188 } else {
189 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
190 "The password is too weak",
191 "Please use a longer password.");
192 Element error = packet.findChild("error");
193 Account.State state = Account.State.REGISTRATION_FAILED;
194 if (error != null) {
195 if (error.hasChild("conflict")) {
196 state = Account.State.REGISTRATION_CONFLICT;
197 } else if (error.hasChild("resource-constraint")
198 && "wait".equals(error.getAttribute("type"))) {
199 state = Account.State.REGISTRATION_PLEASE_WAIT;
200 } else if (error.hasChild("not-acceptable")
201 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
202 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
203 }
204 }
205 changeStatus(state);
206 forceCloseSocket();
207 }
208 }
209 };
210
211 public XmppConnection(final Account account, final XmppConnectionService service) {
212 this.account = account;
213 this.wakeLock = service.getPowerManager().newWakeLock(
214 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
215 tagWriter = new TagWriter();
216 mXmppConnectionService = service;
217 }
218
219 protected synchronized void changeStatus(final Account.State nextStatus) {
220 if (Thread.currentThread().isInterrupted()) {
221 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": not changing status to "+nextStatus+" because thread was interrupted");
222 }
223 if (account.getStatus() != nextStatus) {
224 if ((nextStatus == Account.State.OFFLINE)
225 && (account.getStatus() != Account.State.CONNECTING)
226 && (account.getStatus() != Account.State.ONLINE)
227 && (account.getStatus() != Account.State.DISABLED)) {
228 return;
229 }
230 if (nextStatus == Account.State.ONLINE) {
231 this.attempt = 0;
232 }
233 account.setStatus(nextStatus);
234 if (statusListener != null) {
235 statusListener.onStatusChanged(account);
236 }
237 }
238 }
239
240 public void prepareNewConnection() {
241 this.lastConnect = SystemClock.elapsedRealtime();
242 this.lastPingSent = SystemClock.elapsedRealtime();
243 this.lastDiscoStarted = Long.MAX_VALUE;
244 this.changeStatus(Account.State.CONNECTING);
245 }
246
247 protected void connect() {
248 if (mXmppConnectionService.areMessagesInitialized()) {
249 mXmppConnectionService.resetSendingToWaiting(account);
250 }
251 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
252 features.encryptionEnabled = false;
253 this.attempt++;
254 try {
255 Socket localSocket;
256 shouldAuthenticate = needsBinding = !account.isOptionSet(Account.OPTION_REGISTER);
257 tagReader = new XmlReader(wakeLock);
258 tagWriter = new TagWriter();
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() == null || account.getHostname().isEmpty()) {
265 destination = account.getServer().toString();
266 } else {
267 destination = account.getHostname();
268 }
269 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": connect to " + destination + " via Tor");
270 localSocket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
271 try {
272 startXmpp(localSocket);
273 } catch (InterruptedException e) {
274 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
275 return;
276 } catch (Exception e) {
277 throw new IOException(e.getMessage());
278 }
279 } else if (extended && account.getHostname() != null && !account.getHostname().isEmpty()) {
280
281 InetSocketAddress address = new InetSocketAddress(account.getHostname(), account.getPort());
282
283 features.encryptionEnabled = account.getPort() == 5223;
284
285 try {
286 if (features.encryptionEnabled) {
287 try {
288 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
289 localSocket = tlsFactoryVerifier.factory.createSocket();
290 localSocket.connect(address, Config.SOCKET_TIMEOUT * 1000);
291 final SSLSession session = ((SSLSocket) localSocket).getSession();
292 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), session)) {
293 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
294 throw new SecurityException();
295 }
296 } catch (KeyManagementException e) {
297 features.encryptionEnabled = false;
298 localSocket = new Socket();
299 }
300 } else {
301 localSocket = new Socket();
302 localSocket.connect(address, Config.SOCKET_TIMEOUT * 1000);
303 }
304 } catch (IOException e) {
305 throw new UnknownHostException();
306 }
307 try {
308 startXmpp(localSocket);
309 } catch (InterruptedException e) {
310 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
311 return;
312 } catch (Exception e) {
313 throw new IOException(e.getMessage());
314 }
315 } else if (DNSHelper.isIp(account.getServer().toString())) {
316 localSocket = new Socket();
317 try {
318 localSocket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
319 } catch (IOException e) {
320 throw new UnknownHostException();
321 }
322 try {
323 startXmpp(localSocket);
324 } catch (InterruptedException e) {
325 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
326 return;
327 } catch (Exception e) {
328 throw new IOException(e.getMessage());
329 }
330 } else {
331 final Bundle result = DNSHelper.getSRVRecord(account.getServer(), mXmppConnectionService);
332 final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
333 for (Iterator<Parcelable> iterator = values.iterator(); iterator.hasNext(); ) {
334 if (Thread.currentThread().isInterrupted()) {
335 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Thread was interrupted");
336 return;
337 }
338 final Bundle namePort = (Bundle) iterator.next();
339 try {
340 String srvRecordServer;
341 try {
342 srvRecordServer = IDN.toASCII(namePort.getString("name"));
343 } catch (final IllegalArgumentException e) {
344 // TODO: Handle me?`
345 srvRecordServer = "";
346 }
347 final int srvRecordPort = namePort.getInt("port");
348 final String srvIpServer = namePort.getString("ip");
349 // if tls is true, encryption is implied and must not be started
350 features.encryptionEnabled = namePort.getBoolean("tls");
351 final InetSocketAddress addr;
352 if (srvIpServer != null) {
353 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
354 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
355 + ": using values from dns " + srvRecordServer
356 + "[" + srvIpServer + "]:" + srvRecordPort + " tls: " + features.encryptionEnabled);
357 } else {
358 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
359 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
360 + ": using values from dns "
361 + srvRecordServer + ":" + srvRecordPort + " tls: " + features.encryptionEnabled);
362 }
363
364 if (!features.encryptionEnabled) {
365 localSocket = new Socket();
366 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
367 } else {
368 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
369 localSocket = tlsFactoryVerifier.factory.createSocket();
370
371 if (localSocket == null) {
372 throw new IOException("could not initialize ssl socket");
373 }
374
375 SSLSocketHelper.setSecurity((SSLSocket) localSocket);
376 SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) localSocket, account.getServer().getDomainpart());
377 SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) localSocket, "xmpp-client");
378
379 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
380
381 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) localSocket).getSession())) {
382 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
383 throw new SecurityException();
384 }
385 }
386 if (startXmpp(localSocket)) {
387 break; // successfully connected to server that speaks xmpp
388 } else {
389 localSocket.close();
390 }
391 } catch (final SecurityException e) {
392 throw e;
393 } catch (InterruptedException e) {
394 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
395 return;
396 } catch (final Throwable e) {
397 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
398 if (!iterator.hasNext()) {
399 throw new UnknownHostException();
400 }
401 }
402 }
403 }
404 processStream();
405 } catch (final java.lang.SecurityException e) {
406 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
407 } catch (final RegistrationNotSupportedException e) {
408 this.changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
409 } catch (final IncompatibleServerException e) {
410 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
411 } catch (final SecurityException e) {
412 this.changeStatus(Account.State.SECURITY_ERROR);
413 } catch (final UnauthorizedException e) {
414 this.changeStatus(Account.State.UNAUTHORIZED);
415 } catch (final PaymentRequiredException e) {
416 this.changeStatus(Account.State.PAYMENT_REQUIRED);
417 } catch (final UnknownHostException | ConnectException e) {
418 this.changeStatus(Account.State.SERVER_NOT_FOUND);
419 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
420 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
421 } catch(final StreamErrorHostUnknown e) {
422 this.changeStatus(Account.State.HOST_UNKNOWN);
423 } catch(final StreamErrorPolicyViolation e) {
424 this.changeStatus(Account.State.POLICY_VIOLATION);
425 } catch(final StreamError e) {
426 this.changeStatus(Account.State.STREAM_ERROR);
427 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
428 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
429 this.changeStatus(Account.State.OFFLINE);
430 this.attempt = Math.max(0, this.attempt - 1);
431 } finally {
432 if (!Thread.currentThread().isInterrupted()) {
433 forceCloseSocket();
434 if (wakeLock.isHeld()) {
435 try {
436 wakeLock.release();
437 } catch (final RuntimeException ignored) {
438 }
439 }
440 } else {
441 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": not force closing socket and releasing wake lock because thread was interrupted");
442 }
443 }
444 }
445
446 /**
447 * Starts xmpp protocol, call after connecting to socket
448 * @return true if server returns with valid xmpp, false otherwise
449 */
450 private boolean startXmpp(Socket socket) throws Exception {
451 if (Thread.currentThread().isInterrupted()) {
452 throw new InterruptedException();
453 }
454 this.socket = socket;
455 tagWriter.setOutputStream(socket.getOutputStream());
456 tagReader.setInputStream(socket.getInputStream());
457 tagWriter.beginDocument();
458 sendStartStream();
459 final Tag tag = tagReader.readTag();
460 return tag != null && tag.isStart("stream");
461 }
462
463 private static class TlsFactoryVerifier {
464 private final SSLSocketFactory factory;
465 private final HostnameVerifier verifier;
466
467 public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
468 this.factory = factory;
469 this.verifier = verifier;
470 if (factory == null || verifier == null) {
471 throw new IOException("could not setup ssl");
472 }
473 }
474 }
475
476 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
477 final SSLContext sc = SSLSocketHelper.getSSLContext();
478 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
479 KeyManager[] keyManager;
480 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
481 keyManager = new KeyManager[]{new MyKeyManager()};
482 } else {
483 keyManager = null;
484 }
485 String domain = account.getJid().getDomainpart();
486 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
487 final SSLSocketFactory factory = sc.getSocketFactory();
488 final HostnameVerifier verifier;
489 if (mInteractive) {
490 verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
491 } else {
492 verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
493 }
494
495 return new TlsFactoryVerifier(factory, verifier);
496 }
497
498 @Override
499 public void run() {
500 forceCloseSocket();
501 connect();
502 }
503
504 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
505 Tag nextTag = tagReader.readTag();
506 while (nextTag != null && !nextTag.isEnd("stream")) {
507 if (nextTag.isStart("error")) {
508 processStreamError(nextTag);
509 } else if (nextTag.isStart("features")) {
510 processStreamFeatures(nextTag);
511 } else if (nextTag.isStart("proceed")) {
512 switchOverToTls(nextTag);
513 } else if (nextTag.isStart("success")) {
514 final String challenge = tagReader.readElement(nextTag).getContent();
515 try {
516 saslMechanism.getResponse(challenge);
517 } catch (final SaslMechanism.AuthenticationException e) {
518 disconnect(true);
519 Log.e(Config.LOGTAG, String.valueOf(e));
520 }
521 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
522 account.setKey(Account.PINNED_MECHANISM_KEY,
523 String.valueOf(saslMechanism.getPriority()));
524 tagReader.reset();
525 sendStartStream();
526 final Tag tag = tagReader.readTag();
527 if (tag != null && tag.isStart("stream")) {
528 processStream();
529 } else {
530 throw new IOException("server didn't restart stream after successful auth");
531 }
532 break;
533 } else if (nextTag.isStart("failure")) {
534 final Element failure = tagReader.readElement(nextTag);
535 final String text = failure.findChildContent("text");
536 if (failure.hasChild("account-disabled")
537 && text != null
538 && text.contains("renew")
539 && Config.MAGIC_CREATE_DOMAIN != null
540 && text.contains(Config.MAGIC_CREATE_DOMAIN)) {
541 throw new PaymentRequiredException();
542 } else {
543 throw new UnauthorizedException();
544 }
545 } else if (nextTag.isStart("challenge")) {
546 final String challenge = tagReader.readElement(nextTag).getContent();
547 final Element response = new Element("response");
548 response.setAttribute("xmlns",
549 "urn:ietf:params:xml:ns:xmpp-sasl");
550 try {
551 response.setContent(saslMechanism.getResponse(challenge));
552 } catch (final SaslMechanism.AuthenticationException e) {
553 // TODO: Send auth abort tag.
554 Log.e(Config.LOGTAG, e.toString());
555 }
556 tagWriter.writeElement(response);
557 } else if (nextTag.isStart("enabled")) {
558 final Element enabled = tagReader.readElement(nextTag);
559 if ("true".equals(enabled.getAttribute("resume"))) {
560 this.streamId = enabled.getAttribute("id");
561 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
562 + ": stream management(" + smVersion
563 + ") enabled (resumable)");
564 } else {
565 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
566 + ": stream management(" + smVersion + ") enabled");
567 }
568 this.stanzasReceived = 0;
569 final RequestPacket r = new RequestPacket(smVersion);
570 tagWriter.writeStanzaAsync(r);
571 } else if (nextTag.isStart("resumed")) {
572 lastPacketReceived = SystemClock.elapsedRealtime();
573 final Element resumed = tagReader.readElement(nextTag);
574 final String h = resumed.getAttribute("h");
575 try {
576 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
577 synchronized (this.mStanzaQueue) {
578 final int serverCount = Integer.parseInt(h);
579 if (serverCount != stanzasSent) {
580 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
581 + ": session resumed with lost packages");
582 stanzasSent = serverCount;
583 } else {
584 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
585 }
586 acknowledgeStanzaUpTo(serverCount);
587 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
588 failedStanzas.add(mStanzaQueue.valueAt(i));
589 }
590 mStanzaQueue.clear();
591 }
592 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
593 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
594 if (packet instanceof MessagePacket) {
595 MessagePacket message = (MessagePacket) packet;
596 mXmppConnectionService.markMessage(account,
597 message.getTo().toBareJid(),
598 message.getId(),
599 Message.STATUS_UNSEND);
600 }
601 sendPacket(packet);
602 }
603 } catch (final NumberFormatException ignored) {
604 }
605 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
606 changeStatus(Account.State.ONLINE);
607 } else if (nextTag.isStart("r")) {
608 tagReader.readElement(nextTag);
609 if (Config.EXTENDED_SM_LOGGING) {
610 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
611 }
612 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
613 tagWriter.writeStanzaAsync(ack);
614 } else if (nextTag.isStart("a")) {
615 final Element ack = tagReader.readElement(nextTag);
616 lastPacketReceived = SystemClock.elapsedRealtime();
617 try {
618 synchronized (this.mStanzaQueue) {
619 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
620 acknowledgeStanzaUpTo(serverSequence);
621 }
622 } catch (NumberFormatException | NullPointerException e) {
623 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
624 }
625 } else if (nextTag.isStart("failed")) {
626 Element failed = tagReader.readElement(nextTag);
627 try {
628 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
629 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed but server acknowledged stanza #"+serverCount);
630 synchronized (this.mStanzaQueue) {
631 acknowledgeStanzaUpTo(serverCount);
632 }
633 } catch (NumberFormatException | NullPointerException e) {
634 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed");
635 }
636 resetStreamId();
637 if (account.getStatus() != Account.State.ONLINE) {
638 sendBindRequest();
639 }
640 } else if (nextTag.isStart("iq")) {
641 processIq(nextTag);
642 } else if (nextTag.isStart("message")) {
643 processMessage(nextTag);
644 } else if (nextTag.isStart("presence")) {
645 processPresence(nextTag);
646 }
647 nextTag = tagReader.readTag();
648 }
649 }
650
651 private void acknowledgeStanzaUpTo(int serverCount) {
652 for (int i = 0; i < mStanzaQueue.size(); ++i) {
653 if (serverCount >= mStanzaQueue.keyAt(i)) {
654 if (Config.EXTENDED_SM_LOGGING) {
655 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
656 }
657 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
658 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
659 MessagePacket packet = (MessagePacket) stanza;
660 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
661 }
662 mStanzaQueue.removeAt(i);
663 i--;
664 }
665 }
666 }
667
668 private Element processPacket(final Tag currentTag, final int packetType)
669 throws XmlPullParserException, IOException {
670 Element element;
671 switch (packetType) {
672 case PACKET_IQ:
673 element = new IqPacket();
674 break;
675 case PACKET_MESSAGE:
676 element = new MessagePacket();
677 break;
678 case PACKET_PRESENCE:
679 element = new PresencePacket();
680 break;
681 default:
682 return null;
683 }
684 element.setAttributes(currentTag.getAttributes());
685 Tag nextTag = tagReader.readTag();
686 if (nextTag == null) {
687 throw new IOException("interrupted mid tag");
688 }
689 while (!nextTag.isEnd(element.getName())) {
690 if (!nextTag.isNo()) {
691 final Element child = tagReader.readElement(nextTag);
692 final String type = currentTag.getAttribute("type");
693 if (packetType == PACKET_IQ
694 && "jingle".equals(child.getName())
695 && ("set".equalsIgnoreCase(type) || "get"
696 .equalsIgnoreCase(type))) {
697 element = new JinglePacket();
698 element.setAttributes(currentTag.getAttributes());
699 }
700 element.addChild(child);
701 }
702 nextTag = tagReader.readTag();
703 if (nextTag == null) {
704 throw new IOException("interrupted mid tag");
705 }
706 }
707 if (stanzasReceived == Integer.MAX_VALUE) {
708 resetStreamId();
709 throw new IOException("time to restart the session. cant handle >2 billion pcks");
710 }
711 ++stanzasReceived;
712 lastPacketReceived = SystemClock.elapsedRealtime();
713 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
714 Log.d(Config.LOGTAG,"[background stanza] "+element);
715 }
716 return element;
717 }
718
719 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
720 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
721
722 if (packet.getId() == null) {
723 return; // an iq packet without id is definitely invalid
724 }
725
726 if (packet instanceof JinglePacket) {
727 if (this.jingleListener != null) {
728 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
729 }
730 } else {
731 OnIqPacketReceived callback = null;
732 synchronized (this.packetCallbacks) {
733 if (packetCallbacks.containsKey(packet.getId())) {
734 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
735 // Packets to the server should have responses from the server
736 if (packetCallbackDuple.first.toServer(account)) {
737 if (packet.fromServer(account)) {
738 callback = packetCallbackDuple.second;
739 packetCallbacks.remove(packet.getId());
740 } else {
741 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
742 }
743 } else {
744 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
745 callback = packetCallbackDuple.second;
746 packetCallbacks.remove(packet.getId());
747 } else {
748 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
749 }
750 }
751 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
752 callback = this.unregisteredIqListener;
753 }
754 }
755 if (callback != null) {
756 callback.onIqPacketReceived(account,packet);
757 }
758 }
759 }
760
761 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
762 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
763 this.messageListener.onMessagePacketReceived(account, packet);
764 }
765
766 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
767 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
768 this.presenceListener.onPresencePacketReceived(account, packet);
769 }
770
771 private void sendStartTLS() throws IOException {
772 final Tag startTLS = Tag.empty("starttls");
773 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
774 tagWriter.writeTag(startTLS);
775 }
776
777
778
779 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
780 tagReader.readTag();
781 try {
782 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
783 final InetAddress address = socket == null ? null : socket.getInetAddress();
784
785 if (address == null) {
786 throw new IOException("could not setup ssl");
787 }
788
789 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
790
791 if (sslSocket == null) {
792 throw new IOException("could not initialize ssl socket");
793 }
794
795 SSLSocketHelper.setSecurity(sslSocket);
796
797 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
798 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
799 throw new SecurityException();
800 }
801 tagReader.setInputStream(sslSocket.getInputStream());
802 tagWriter.setOutputStream(sslSocket.getOutputStream());
803 sendStartStream();
804 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
805 features.encryptionEnabled = true;
806 final Tag tag = tagReader.readTag();
807 if (tag != null && tag.isStart("stream")) {
808 processStream();
809 } else {
810 throw new IOException("server didn't restart stream after STARTTLS");
811 }
812 sslSocket.close();
813 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
814 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
815 throw new SecurityException();
816 }
817 }
818
819 private void processStreamFeatures(final Tag currentTag)
820 throws XmlPullParserException, IOException {
821 this.streamFeatures = tagReader.readElement(currentTag);
822 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
823 sendStartTLS();
824 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
825 if (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS) {
826 sendRegistryRequest();
827 } else {
828 throw new IncompatibleServerException();
829 }
830 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
831 throw new RegistrationNotSupportedException();
832 } else if (this.streamFeatures.hasChild("mechanisms")
833 && shouldAuthenticate
834 && (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS)) {
835 authenticate();
836 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
837 if (Config.EXTENDED_SM_LOGGING) {
838 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
839 }
840 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
841 this.tagWriter.writeStanzaAsync(resume);
842 } else if (needsBinding) {
843 if (this.streamFeatures.hasChild("bind")) {
844 sendBindRequest();
845 } else {
846 throw new IncompatibleServerException();
847 }
848 }
849 }
850
851 private void authenticate() throws IOException {
852 final List<String> mechanisms = extractMechanisms(streamFeatures
853 .findChild("mechanisms"));
854 final Element auth = new Element("auth");
855 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
856 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
857 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
858 } else if (mechanisms.contains("SCRAM-SHA-1")) {
859 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
860 } else if (mechanisms.contains("PLAIN")) {
861 saslMechanism = new Plain(tagWriter, account);
862 } else if (mechanisms.contains("DIGEST-MD5")) {
863 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
864 } else if (mechanisms.contains("ANONYMOUS")) {
865 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
866 }
867 if (saslMechanism != null) {
868 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
869 if (pinnedMechanism > saslMechanism.getPriority()) {
870 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
871 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
872 ") than pinned priority (" + pinnedMechanism +
873 "). Possible downgrade attack?");
874 throw new SecurityException();
875 }
876 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
877 auth.setAttribute("mechanism", saslMechanism.getMechanism());
878 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
879 auth.setContent(saslMechanism.getClientFirstMessage());
880 }
881 tagWriter.writeElement(auth);
882 } else {
883 throw new IncompatibleServerException();
884 }
885 }
886
887 private List<String> extractMechanisms(final Element stream) {
888 final ArrayList<String> mechanisms = new ArrayList<>(stream
889 .getChildren().size());
890 for (final Element child : stream.getChildren()) {
891 mechanisms.add(child.getContent());
892 }
893 return mechanisms;
894 }
895
896 private void sendRegistryRequest() {
897 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
898 register.query("jabber:iq:register");
899 register.setTo(account.getServer());
900 sendUnmodifiedIqPacket(register, new OnIqPacketReceived() {
901
902 @Override
903 public void onIqPacketReceived(final Account account, final IqPacket packet) {
904 boolean failed = false;
905 if (packet.getType() == IqPacket.TYPE.RESULT
906 && packet.query().hasChild("username")
907 && (packet.query().hasChild("password"))) {
908 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
909 final Element username = new Element("username").setContent(account.getUsername());
910 final Element password = new Element("password").setContent(account.getPassword());
911 register.query("jabber:iq:register").addChild(username);
912 register.query().addChild(password);
913 register.setFrom(account.getJid().toBareJid());
914 sendUnmodifiedIqPacket(register, registrationResponseListener);
915 } else if (packet.getType() == IqPacket.TYPE.RESULT
916 && (packet.query().hasChild("x", "jabber:x:data"))) {
917 final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
918 final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
919 final String id = packet.getId();
920
921 Bitmap captcha = null;
922 if (blob != null) {
923 try {
924 final String base64Blob = blob.getContent();
925 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
926 InputStream stream = new ByteArrayInputStream(strBlob);
927 captcha = BitmapFactory.decodeStream(stream);
928 } catch (Exception e) {
929 //ignored
930 }
931 } else {
932 try {
933 Field url = data.getFieldByName("url");
934 String urlString = url.findChildContent("value");
935 URL uri = new URL(urlString);
936 captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
937 } catch (IOException e) {
938 Log.e(Config.LOGTAG, e.toString());
939 }
940 }
941
942 if (captcha != null) {
943 failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
944 }
945 } else {
946 failed = true;
947 }
948
949 if (failed) {
950 final Element instructions = packet.query().findChild("instructions");
951 setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
952 }
953 }
954 });
955 }
956
957 private void setAccountCreationFailed(String instructions) {
958 changeStatus(Account.State.REGISTRATION_FAILED);
959 disconnect(true);
960 Log.d(Config.LOGTAG, account.getJid().toBareJid()
961 + ": could not register. instructions are"
962 + instructions);
963 }
964
965 public void resetEverything() {
966 resetAttemptCount(true);
967 resetStreamId();
968 clearIqCallbacks();
969 mStanzaQueue.clear();
970 synchronized (this.disco) {
971 disco.clear();
972 }
973 }
974
975 private void sendBindRequest() {
976 while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
977 try {
978 Thread.sleep(500);
979 } catch (final InterruptedException ignored) {
980 }
981 }
982 needsBinding = false;
983 clearIqCallbacks();
984 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
985 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
986 .addChild("resource").setContent(account.getResource());
987 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
988 @Override
989 public void onIqPacketReceived(final Account account, final IqPacket packet) {
990 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
991 return;
992 }
993 final Element bind = packet.findChild("bind");
994 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
995 final Element jid = bind.findChild("jid");
996 if (jid != null && jid.getContent() != null) {
997 try {
998 if (account.setJid(Jid.fromString(jid.getContent()))) {
999 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": bare jid changed during bind. updating database");
1000 mXmppConnectionService.databaseBackend.updateAccount(account);
1001 }
1002 if (streamFeatures.hasChild("session")
1003 && !streamFeatures.findChild("session").hasChild("optional")) {
1004 sendStartSession();
1005 } else {
1006 sendPostBindInitialization();
1007 }
1008 return;
1009 } catch (final InvalidJidException e) {
1010 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server reported invalid jid ("+jid.getContent()+") on bind");
1011 }
1012 } else {
1013 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1014 }
1015 } else {
1016 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1017 }
1018 forceCloseSocket();
1019 changeStatus(Account.State.BIND_FAILURE);
1020 }
1021 });
1022 }
1023
1024 private void clearIqCallbacks() {
1025 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1026 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1027 synchronized (this.packetCallbacks) {
1028 if (this.packetCallbacks.size() == 0) {
1029 return;
1030 }
1031 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
1032 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1033 while (iterator.hasNext()) {
1034 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1035 callbacks.add(entry.second);
1036 iterator.remove();
1037 }
1038 }
1039 for(OnIqPacketReceived callback : callbacks) {
1040 callback.onIqPacketReceived(account,failurePacket);
1041 }
1042 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1043 }
1044
1045 public void sendDiscoTimeout() {
1046 if (mWaitForDisco.compareAndSet(true, false)) {
1047 finalizeBind();
1048 }
1049 }
1050
1051 private void sendStartSession() {
1052 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending legacy session to outdated server");
1053 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1054 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1055 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
1056 @Override
1057 public void onIqPacketReceived(Account account, IqPacket packet) {
1058 if (packet.getType() == IqPacket.TYPE.RESULT) {
1059 sendPostBindInitialization();
1060 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1061 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
1062 disconnect(true);
1063 }
1064 }
1065 });
1066 }
1067
1068 private void sendPostBindInitialization() {
1069 smVersion = 0;
1070 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1071 smVersion = 3;
1072 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1073 smVersion = 2;
1074 }
1075 if (smVersion != 0) {
1076 synchronized (this.mStanzaQueue) {
1077 final EnablePacket enable = new EnablePacket(smVersion);
1078 tagWriter.writeStanzaAsync(enable);
1079 stanzasSent = 0;
1080 mStanzaQueue.clear();
1081 }
1082 }
1083 features.carbonsEnabled = false;
1084 features.blockListRequested = false;
1085 synchronized (this.disco) {
1086 this.disco.clear();
1087 }
1088 mPendingServiceDiscoveries.set(0);
1089 mWaitForDisco.set(smVersion != 0 && !account.getJid().getDomainpart().equalsIgnoreCase("nimbuzz.com"));
1090 lastDiscoStarted = SystemClock.elapsedRealtime();
1091 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
1092 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1093 Element caps = streamFeatures.findChild("c");
1094 final String hash = caps == null ? null : caps.getAttribute("hash");
1095 final String ver = caps == null ? null : caps.getAttribute("ver");
1096 ServiceDiscoveryResult discoveryResult = null;
1097 if (hash != null && ver != null) {
1098 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1099 }
1100 if (discoveryResult == null) {
1101 sendServiceDiscoveryInfo(account.getServer());
1102 } else {
1103 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server caps came from cache");
1104 disco.put(account.getServer(), discoveryResult);
1105 }
1106 sendServiceDiscoveryInfo(account.getJid().toBareJid());
1107 sendServiceDiscoveryItems(account.getServer());
1108
1109 if (!mWaitForDisco.get()) {
1110 finalizeBind();
1111 }
1112 this.lastSessionStarted = SystemClock.elapsedRealtime();
1113 }
1114
1115 private void sendServiceDiscoveryInfo(final Jid jid) {
1116 mPendingServiceDiscoveries.incrementAndGet();
1117 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1118 iq.setTo(jid);
1119 iq.query("http://jabber.org/protocol/disco#info");
1120 this.sendIqPacket(iq, new OnIqPacketReceived() {
1121
1122 @Override
1123 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1124 if (packet.getType() == IqPacket.TYPE.RESULT) {
1125 boolean advancedStreamFeaturesLoaded;
1126 synchronized (XmppConnection.this.disco) {
1127 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1128 if (jid.equals(account.getServer())) {
1129 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1130 }
1131 disco.put(jid, result);
1132 advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
1133 && disco.containsKey(account.getJid().toBareJid());
1134 }
1135 if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
1136 enableAdvancedStreamFeatures();
1137 }
1138 } else {
1139 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
1140 }
1141 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1142 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1143 && mWaitForDisco.compareAndSet(true, false)) {
1144 finalizeBind();
1145 }
1146 }
1147 }
1148 });
1149 }
1150
1151 private void finalizeBind() {
1152 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
1153 if (bindListener != null) {
1154 bindListener.onBind(account);
1155 }
1156 changeStatus(Account.State.ONLINE);
1157 }
1158
1159 private void enableAdvancedStreamFeatures() {
1160 if (getFeatures().carbons() && !features.carbonsEnabled) {
1161 sendEnableCarbons();
1162 }
1163 if (getFeatures().blocking() && !features.blockListRequested) {
1164 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
1165 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1166 }
1167 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1168 listener.onAdvancedStreamFeaturesAvailable(account);
1169 }
1170 }
1171
1172 private void sendServiceDiscoveryItems(final Jid server) {
1173 mPendingServiceDiscoveries.incrementAndGet();
1174 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1175 iq.setTo(server.toDomainJid());
1176 iq.query("http://jabber.org/protocol/disco#items");
1177 this.sendIqPacket(iq, new OnIqPacketReceived() {
1178
1179 @Override
1180 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1181 if (packet.getType() == IqPacket.TYPE.RESULT) {
1182 final List<Element> elements = packet.query().getChildren();
1183 for (final Element element : elements) {
1184 if (element.getName().equals("item")) {
1185 final Jid jid = element.getAttributeAsJid("jid");
1186 if (jid != null && !jid.equals(account.getServer())) {
1187 sendServiceDiscoveryInfo(jid);
1188 }
1189 }
1190 }
1191 } else {
1192 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
1193 }
1194 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1195 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1196 && mWaitForDisco.compareAndSet(true, false)) {
1197 finalizeBind();
1198 }
1199 }
1200 }
1201 });
1202 }
1203
1204 private void sendEnableCarbons() {
1205 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1206 iq.addChild("enable", "urn:xmpp:carbons:2");
1207 this.sendIqPacket(iq, new OnIqPacketReceived() {
1208
1209 @Override
1210 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1211 if (!packet.hasChild("error")) {
1212 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1213 + ": successfully enabled carbons");
1214 features.carbonsEnabled = true;
1215 } else {
1216 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1217 + ": error enableing carbons " + packet.toString());
1218 }
1219 }
1220 });
1221 }
1222
1223 private void processStreamError(final Tag currentTag)
1224 throws XmlPullParserException, IOException {
1225 final Element streamError = tagReader.readElement(currentTag);
1226 if (streamError == null) {
1227 return;
1228 }
1229 if (streamError.hasChild("conflict")) {
1230 final String resource = account.getResource().split("\\.")[0];
1231 account.setResource(resource + "." + nextRandomId());
1232 Log.d(Config.LOGTAG,
1233 account.getJid().toBareJid() + ": switching resource due to conflict ("
1234 + account.getResource() + ")");
1235 throw new IOException();
1236 } else if (streamError.hasChild("host-unknown")) {
1237 throw new StreamErrorHostUnknown();
1238 } else if (streamError.hasChild("policy-violation")) {
1239 throw new StreamErrorPolicyViolation();
1240 } else {
1241 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
1242 throw new StreamError();
1243 }
1244 }
1245
1246 private void sendStartStream() throws IOException {
1247 final Tag stream = Tag.start("stream:stream");
1248 stream.setAttribute("to", account.getServer().toString());
1249 stream.setAttribute("version", "1.0");
1250 stream.setAttribute("xml:lang", "en");
1251 stream.setAttribute("xmlns", "jabber:client");
1252 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1253 tagWriter.writeTag(stream);
1254 }
1255
1256 private String nextRandomId() {
1257 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
1258 }
1259
1260 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1261 packet.setFrom(account.getJid());
1262 return this.sendUnmodifiedIqPacket(packet, callback);
1263 }
1264
1265 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1266 if (packet.getId() == null) {
1267 final String id = nextRandomId();
1268 packet.setAttribute("id", id);
1269 }
1270 if (callback != null) {
1271 synchronized (this.packetCallbacks) {
1272 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1273 }
1274 }
1275 this.sendPacket(packet);
1276 return packet.getId();
1277 }
1278
1279 public void sendMessagePacket(final MessagePacket packet) {
1280 this.sendPacket(packet);
1281 }
1282
1283 public void sendPresencePacket(final PresencePacket packet) {
1284 this.sendPacket(packet);
1285 }
1286
1287 private synchronized void sendPacket(final AbstractStanza packet) {
1288 if (stanzasSent == Integer.MAX_VALUE) {
1289 resetStreamId();
1290 disconnect(true);
1291 return;
1292 }
1293 synchronized (this.mStanzaQueue) {
1294 tagWriter.writeStanzaAsync(packet);
1295 if (packet instanceof AbstractAcknowledgeableStanza) {
1296 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1297 ++stanzasSent;
1298 this.mStanzaQueue.append(stanzasSent, stanza);
1299 if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
1300 if (Config.EXTENDED_SM_LOGGING) {
1301 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1302 }
1303 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1304 }
1305 }
1306 }
1307 }
1308
1309 public void sendPing() {
1310 if (!r()) {
1311 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1312 iq.setFrom(account.getJid());
1313 iq.addChild("ping", "urn:xmpp:ping");
1314 this.sendIqPacket(iq, null);
1315 }
1316 this.lastPingSent = SystemClock.elapsedRealtime();
1317 }
1318
1319 public void setOnMessagePacketReceivedListener(
1320 final OnMessagePacketReceived listener) {
1321 this.messageListener = listener;
1322 }
1323
1324 public void setOnUnregisteredIqPacketReceivedListener(
1325 final OnIqPacketReceived listener) {
1326 this.unregisteredIqListener = listener;
1327 }
1328
1329 public void setOnPresencePacketReceivedListener(
1330 final OnPresencePacketReceived listener) {
1331 this.presenceListener = listener;
1332 }
1333
1334 public void setOnJinglePacketReceivedListener(
1335 final OnJinglePacketReceived listener) {
1336 this.jingleListener = listener;
1337 }
1338
1339 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1340 this.statusListener = listener;
1341 }
1342
1343 public void setOnBindListener(final OnBindListener listener) {
1344 this.bindListener = listener;
1345 }
1346
1347 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1348 this.acknowledgedListener = listener;
1349 }
1350
1351 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1352 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1353 this.advancedStreamFeaturesLoadedListeners.add(listener);
1354 }
1355 }
1356
1357 private void forceCloseSocket() {
1358 if (socket != null) {
1359 try {
1360 socket.close();
1361 } catch (IOException e) {
1362 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception "+e.getMessage()+" during force close");
1363 }
1364 } else {
1365 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": socket was null during force close");
1366 }
1367 }
1368
1369 public void interrupt() {
1370 Thread.currentThread().interrupt();
1371 }
1372
1373 public void disconnect(final boolean force) {
1374 interrupt();
1375 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
1376 if (force) {
1377 tagWriter.forceClose();
1378 forceCloseSocket();
1379 } else {
1380 if (tagWriter.isActive()) {
1381 tagWriter.finish();
1382 try {
1383 int i = 0;
1384 boolean warned = false;
1385 while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
1386 if (!warned) {
1387 Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
1388 warned = true;
1389 }
1390 try {
1391 Thread.sleep(200);
1392 } catch(InterruptedException e) {
1393 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sleep interrupted");
1394 }
1395 i++;
1396 }
1397 if (warned) {
1398 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
1399 }
1400 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
1401 tagWriter.writeTag(Tag.end("stream:stream"));
1402 } catch (final IOException e) {
1403 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
1404 } finally {
1405 forceCloseSocket();
1406 }
1407 }
1408 }
1409 }
1410
1411 public void resetStreamId() {
1412 this.streamId = null;
1413 }
1414
1415 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1416 synchronized (this.disco) {
1417 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1418 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1419 if (cursor.getValue().getFeatures().contains(feature)) {
1420 items.add(cursor);
1421 }
1422 }
1423 return items;
1424 }
1425 }
1426
1427 public Jid findDiscoItemByFeature(final String feature) {
1428 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1429 if (items.size() >= 1) {
1430 return items.get(0).getKey();
1431 }
1432 return null;
1433 }
1434
1435 public boolean r() {
1436 if (getFeatures().sm()) {
1437 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1438 return true;
1439 } else {
1440 return false;
1441 }
1442 }
1443
1444 public String getMucServer() {
1445 synchronized (this.disco) {
1446 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1447 final ServiceDiscoveryResult value = cursor.getValue();
1448 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1449 && !value.getFeatures().contains("jabber:iq:gateway")
1450 && !value.hasIdentity("conference", "irc")) {
1451 return cursor.getKey().toString();
1452 }
1453 }
1454 }
1455 return null;
1456 }
1457
1458 public int getTimeToNextAttempt() {
1459 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1460 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1461 return interval - secondsSinceLast;
1462 }
1463
1464 public int getAttempt() {
1465 return this.attempt;
1466 }
1467
1468 public Features getFeatures() {
1469 return this.features;
1470 }
1471
1472 public long getLastSessionEstablished() {
1473 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1474 return System.currentTimeMillis() - diff;
1475 }
1476
1477 public long getLastConnect() {
1478 return this.lastConnect;
1479 }
1480
1481 public long getLastPingSent() {
1482 return this.lastPingSent;
1483 }
1484
1485 public long getLastDiscoStarted() {
1486 return this.lastDiscoStarted;
1487 }
1488 public long getLastPacketReceived() {
1489 return this.lastPacketReceived;
1490 }
1491
1492 public void sendActive() {
1493 this.sendPacket(new ActivePacket());
1494 }
1495
1496 public void sendInactive() {
1497 this.sendPacket(new InactivePacket());
1498 }
1499
1500 public void resetAttemptCount(boolean resetConnectTime) {
1501 this.attempt = 0;
1502 if (resetConnectTime) {
1503 this.lastConnect = 0;
1504 }
1505 }
1506
1507 public void setInteractive(boolean interactive) {
1508 this.mInteractive = interactive;
1509 }
1510
1511 public Identity getServerIdentity() {
1512 synchronized (this.disco) {
1513 ServiceDiscoveryResult result = disco.get(account.getJid().toDomainJid());
1514 if (result == null) {
1515 return Identity.UNKNOWN;
1516 }
1517 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1518 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1519 switch (id.getName()) {
1520 case "Prosody":
1521 return Identity.PROSODY;
1522 case "ejabberd":
1523 return Identity.EJABBERD;
1524 case "Slack-XMPP":
1525 return Identity.SLACK;
1526 }
1527 }
1528 }
1529 }
1530 return Identity.UNKNOWN;
1531 }
1532
1533 private class UnauthorizedException extends IOException {
1534
1535 }
1536
1537 private class SecurityException extends IOException {
1538
1539 }
1540
1541 private class IncompatibleServerException extends IOException {
1542
1543 }
1544
1545 private class StreamErrorHostUnknown extends StreamError {
1546
1547 }
1548
1549 private class StreamErrorPolicyViolation extends StreamError {
1550
1551 }
1552
1553 private class StreamError extends IOException {
1554
1555 }
1556
1557 private class PaymentRequiredException extends IOException {
1558
1559 }
1560
1561 private class RegistrationNotSupportedException extends IOException {
1562
1563 }
1564
1565 public enum Identity {
1566 FACEBOOK,
1567 SLACK,
1568 EJABBERD,
1569 PROSODY,
1570 NIMBUZZ,
1571 UNKNOWN
1572 }
1573
1574 public class Features {
1575 XmppConnection connection;
1576 private boolean carbonsEnabled = false;
1577 private boolean encryptionEnabled = false;
1578 private boolean blockListRequested = false;
1579
1580 public Features(final XmppConnection connection) {
1581 this.connection = connection;
1582 }
1583
1584 private boolean hasDiscoFeature(final Jid server, final String feature) {
1585 synchronized (XmppConnection.this.disco) {
1586 return connection.disco.containsKey(server) &&
1587 connection.disco.get(server).getFeatures().contains(feature);
1588 }
1589 }
1590
1591 public boolean carbons() {
1592 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1593 }
1594
1595 public boolean blocking() {
1596 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1597 }
1598
1599 public boolean spamReporting() {
1600 return hasDiscoFeature(account.getServer(), "urn:xmpp:reporting:reason:spam:0");
1601 }
1602
1603 public boolean register() {
1604 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1605 }
1606
1607 public boolean sm() {
1608 return streamId != null
1609 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1610 }
1611
1612 public boolean csi() {
1613 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1614 }
1615
1616 public boolean pep() {
1617 synchronized (XmppConnection.this.disco) {
1618 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1619 return info != null && info.hasIdentity("pubsub", "pep");
1620 }
1621 }
1622
1623 public boolean pepPersistent() {
1624 synchronized (XmppConnection.this.disco) {
1625 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1626 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1627 }
1628 }
1629
1630 public boolean mam() {
1631 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")
1632 || hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1633 }
1634
1635 public boolean push() {
1636 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:push:0")
1637 || hasDiscoFeature(account.getServer(), "urn:xmpp:push:0");
1638 }
1639
1640 public boolean rosterVersioning() {
1641 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1642 }
1643
1644 public void setBlockListRequested(boolean value) {
1645 this.blockListRequested = value;
1646 }
1647
1648 public boolean httpUpload(long filesize) {
1649 if (Config.DISABLE_HTTP_UPLOAD) {
1650 return false;
1651 } else {
1652 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1653 if (items.size() > 0) {
1654 try {
1655 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1656 if(filesize <= maxsize) {
1657 return true;
1658 } else {
1659 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": http upload is not available for files with size "+filesize+" (max is "+maxsize+")");
1660 return false;
1661 }
1662 } catch (Exception e) {
1663 return true;
1664 }
1665 } else {
1666 return false;
1667 }
1668 }
1669 }
1670
1671 public long getMaxHttpUploadSize() {
1672 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1673 if (items.size() > 0) {
1674 try {
1675 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1676 } catch (Exception e) {
1677 return -1;
1678 }
1679 } else {
1680 return -1;
1681 }
1682 }
1683
1684 public boolean stanzaIds() {
1685 return hasDiscoFeature(account.getJid().toBareJid(),Xmlns.STANZA_IDS);
1686 }
1687 }
1688
1689 private IqGenerator getIqGenerator() {
1690 return mXmppConnectionService.getIqGenerator();
1691 }
1692}