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.HashMap;
38import java.util.Hashtable;
39import java.util.Iterator;
40import java.util.List;
41import java.util.Map.Entry;
42import java.util.concurrent.atomic.AtomicBoolean;
43import java.util.concurrent.atomic.AtomicInteger;
44
45import javax.net.ssl.HostnameVerifier;
46import javax.net.ssl.KeyManager;
47import javax.net.ssl.SSLContext;
48import javax.net.ssl.SSLSocket;
49import javax.net.ssl.SSLSocketFactory;
50import javax.net.ssl.X509KeyManager;
51import javax.net.ssl.X509TrustManager;
52
53import de.duenndns.ssl.MemorizingTrustManager;
54import eu.siacs.conversations.Config;
55import eu.siacs.conversations.crypto.XmppDomainVerifier;
56import eu.siacs.conversations.crypto.sasl.DigestMd5;
57import eu.siacs.conversations.crypto.sasl.External;
58import eu.siacs.conversations.crypto.sasl.Plain;
59import eu.siacs.conversations.crypto.sasl.SaslMechanism;
60import eu.siacs.conversations.crypto.sasl.ScramSha1;
61import eu.siacs.conversations.entities.Account;
62import eu.siacs.conversations.entities.Message;
63import eu.siacs.conversations.entities.ServiceDiscoveryResult;
64import eu.siacs.conversations.generator.IqGenerator;
65import eu.siacs.conversations.services.XmppConnectionService;
66import eu.siacs.conversations.utils.DNSHelper;
67import eu.siacs.conversations.utils.SSLSocketHelper;
68import eu.siacs.conversations.utils.SocksSocketFactory;
69import eu.siacs.conversations.utils.Xmlns;
70import eu.siacs.conversations.xml.Element;
71import eu.siacs.conversations.xml.Tag;
72import eu.siacs.conversations.xml.TagWriter;
73import eu.siacs.conversations.xml.XmlReader;
74import eu.siacs.conversations.xmpp.forms.Data;
75import eu.siacs.conversations.xmpp.forms.Field;
76import eu.siacs.conversations.xmpp.jid.InvalidJidException;
77import eu.siacs.conversations.xmpp.jid.Jid;
78import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
79import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
80import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
81import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
82import eu.siacs.conversations.xmpp.stanzas.IqPacket;
83import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
84import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
85import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
86import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
87import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
88import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
89import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
90import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
91
92public class XmppConnection implements Runnable {
93
94 private static final int PACKET_IQ = 0;
95 private static final int PACKET_MESSAGE = 1;
96 private static final int PACKET_PRESENCE = 2;
97 protected Account account;
98 private final WakeLock wakeLock;
99 private Socket socket;
100 private XmlReader tagReader;
101 private TagWriter tagWriter;
102 private final Features features = new Features(this);
103 private boolean needsBinding = true;
104 private boolean shouldAuthenticate = true;
105 private Element streamFeatures;
106 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
107
108 private String streamId = null;
109 private int smVersion = 3;
110 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
111
112 private int stanzasReceived = 0;
113 private int stanzasSent = 0;
114 private long lastPacketReceived = 0;
115 private long lastPingSent = 0;
116 private long lastConnect = 0;
117 private long lastSessionStarted = 0;
118 private long lastDiscoStarted = 0;
119 private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
120 private AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
121 private boolean mInteractive = false;
122 private int attempt = 0;
123 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
124 private OnPresencePacketReceived presenceListener = null;
125 private OnJinglePacketReceived jingleListener = null;
126 private OnIqPacketReceived unregisteredIqListener = null;
127 private OnMessagePacketReceived messageListener = null;
128 private OnStatusChanged statusListener = null;
129 private OnBindListener bindListener = null;
130 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
131 private OnMessageAcknowledged acknowledgedListener = null;
132 private XmppConnectionService mXmppConnectionService = null;
133
134 private SaslMechanism saslMechanism;
135
136 private X509KeyManager mKeyManager = new X509KeyManager() {
137 @Override
138 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
139 return account.getPrivateKeyAlias();
140 }
141
142 @Override
143 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
144 return null;
145 }
146
147 @Override
148 public X509Certificate[] getCertificateChain(String alias) {
149 try {
150 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
151 } catch (Exception e) {
152 return new X509Certificate[0];
153 }
154 }
155
156 @Override
157 public String[] getClientAliases(String s, Principal[] principals) {
158 return new String[0];
159 }
160
161 @Override
162 public String[] getServerAliases(String s, Principal[] principals) {
163 return new String[0];
164 }
165
166 @Override
167 public PrivateKey getPrivateKey(String alias) {
168 try {
169 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
170 } catch (Exception e) {
171 return null;
172 }
173 }
174 };
175 private Identity mServerIdentity = Identity.UNKNOWN;
176
177 public final OnIqPacketReceived registrationResponseListener = new OnIqPacketReceived() {
178 @Override
179 public void onIqPacketReceived(Account account, IqPacket packet) {
180 if (packet.getType() == IqPacket.TYPE.RESULT) {
181 account.setOption(Account.OPTION_REGISTER, false);
182 forceCloseSocket();
183 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
184 } else {
185 Element error = packet.findChild("error");
186 if (error != null && error.hasChild("conflict")) {
187 forceCloseSocket();
188 changeStatus(Account.State.REGISTRATION_CONFLICT);
189 } else if (error != null
190 && "wait".equals(error.getAttribute("type"))
191 && error.hasChild("resource-constraint")) {
192 forceCloseSocket();
193 changeStatus(Account.State.REGISTRATION_PLEASE_WAIT);
194 } else {
195 forceCloseSocket();
196 changeStatus(Account.State.REGISTRATION_FAILED);
197 Log.d(Config.LOGTAG, packet.toString());
198 }
199 }
200 }
201 };
202
203 public XmppConnection(final Account account, final XmppConnectionService service) {
204 this.account = account;
205 this.wakeLock = service.getPowerManager().newWakeLock(
206 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
207 tagWriter = new TagWriter();
208 mXmppConnectionService = service;
209 }
210
211 protected void changeStatus(final Account.State nextStatus) {
212 if (account.getStatus() != nextStatus) {
213 if ((nextStatus == Account.State.OFFLINE)
214 && (account.getStatus() != Account.State.CONNECTING)
215 && (account.getStatus() != Account.State.ONLINE)
216 && (account.getStatus() != Account.State.DISABLED)) {
217 return;
218 }
219 if (nextStatus == Account.State.ONLINE) {
220 this.attempt = 0;
221 }
222 account.setStatus(nextStatus);
223 if (statusListener != null) {
224 statusListener.onStatusChanged(account);
225 }
226 }
227 }
228
229 public void prepareNewConnection() {
230 this.lastConnect = SystemClock.elapsedRealtime();
231 this.lastPingSent = SystemClock.elapsedRealtime();
232 this.lastDiscoStarted = Long.MAX_VALUE;
233 this.changeStatus(Account.State.CONNECTING);
234 }
235
236 protected void connect() {
237 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
238 features.encryptionEnabled = false;
239 this.attempt++;
240 switch (account.getJid().getDomainpart()) {
241 case "chat.facebook.com":
242 mServerIdentity = Identity.FACEBOOK;
243 break;
244 case "nimbuzz.com":
245 mServerIdentity = Identity.NIMBUZZ;
246 break;
247 default:
248 mServerIdentity = Identity.UNKNOWN;
249 break;
250 }
251 try {
252 shouldAuthenticate = needsBinding = !account.isOptionSet(Account.OPTION_REGISTER);
253 tagReader = new XmlReader(wakeLock);
254 tagWriter = new TagWriter();
255 this.changeStatus(Account.State.CONNECTING);
256 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
257 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
258 if (useTor) {
259 String destination;
260 if (account.getHostname() == null || account.getHostname().isEmpty()) {
261 destination = account.getServer().toString();
262 } else {
263 destination = account.getHostname();
264 }
265 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": connect to " + destination + " via TOR");
266 socket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
267 startXmpp();
268 } else if (extended && account.getHostname() != null && !account.getHostname().isEmpty()) {
269 socket = new Socket();
270 try {
271 socket.connect(new InetSocketAddress(account.getHostname(), account.getPort()), Config.SOCKET_TIMEOUT * 1000);
272 } catch (IOException e) {
273 throw new UnknownHostException();
274 }
275 startXmpp();
276 } else if (DNSHelper.isIp(account.getServer().toString())) {
277 socket = new Socket();
278 try {
279 socket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
280 } catch (IOException e) {
281 throw new UnknownHostException();
282 }
283 startXmpp();
284 } else {
285 final Bundle result = DNSHelper.getSRVRecord(account.getServer(), mXmppConnectionService);
286 final ArrayList<Parcelable>values = result.getParcelableArrayList("values");
287 for(Iterator<Parcelable> iterator = values.iterator(); iterator.hasNext();) {
288 if (Thread.currentThread().isInterrupted()) {
289 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": Thread was interrupted");
290 return;
291 }
292 final Bundle namePort = (Bundle) iterator.next();
293 try {
294 String srvRecordServer;
295 try {
296 srvRecordServer = IDN.toASCII(namePort.getString("name"));
297 } catch (final IllegalArgumentException e) {
298 // TODO: Handle me?`
299 srvRecordServer = "";
300 }
301 final int srvRecordPort = namePort.getInt("port");
302 final String srvIpServer = namePort.getString("ip");
303 // if tls is true, encryption is implied and must not be started
304 features.encryptionEnabled = namePort.getBoolean("tls");
305 final InetSocketAddress addr;
306 if (srvIpServer != null) {
307 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
308 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
309 + ": using values from dns " + srvRecordServer
310 + "[" + srvIpServer + "]:" + srvRecordPort + " tls: " + features.encryptionEnabled);
311 } else {
312 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
313 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
314 + ": using values from dns "
315 + srvRecordServer + ":" + srvRecordPort + " tls: " + features.encryptionEnabled);
316 }
317
318 if (!features.encryptionEnabled) {
319 socket = new Socket();
320 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
321 } else {
322 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
323 socket = tlsFactoryVerifier.factory.createSocket();
324
325 if (socket == null) {
326 throw new IOException("could not initialize ssl socket");
327 }
328
329 SSLSocketHelper.setSecurity((SSLSocket) socket);
330 SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) socket, account.getServer().getDomainpart());
331 SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) socket, "xmpp-client");
332
333 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
334
335 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) socket).getSession())) {
336 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
337 throw new SecurityException();
338 }
339 }
340
341 if (startXmpp())
342 break; // successfully connected to server that speaks xmpp
343 } catch(final SecurityException e) {
344 throw e;
345 } catch (final Throwable e) {
346 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() +"("+e.getClass().getName()+")");
347 if (!iterator.hasNext()) {
348 throw new UnknownHostException();
349 }
350 }
351 }
352 }
353 processStream();
354 } catch (final IncompatibleServerException e) {
355 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
356 } catch (final SecurityException e) {
357 this.changeStatus(Account.State.SECURITY_ERROR);
358 } catch (final UnauthorizedException e) {
359 this.changeStatus(Account.State.UNAUTHORIZED);
360 } catch (final UnknownHostException | ConnectException e) {
361 this.changeStatus(Account.State.SERVER_NOT_FOUND);
362 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
363 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
364 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
365 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
366 this.changeStatus(Account.State.OFFLINE);
367 this.attempt = Math.max(0, this.attempt - 1);
368 } finally {
369 forceCloseSocket();
370 if (wakeLock.isHeld()) {
371 try {
372 wakeLock.release();
373 } catch (final RuntimeException ignored) {
374 }
375 }
376 }
377 }
378
379 /**
380 * Starts xmpp protocol, call after connecting to socket
381 * @return true if server returns with valid xmpp, false otherwise
382 * @throws IOException Unknown tag on connect
383 * @throws XmlPullParserException Bad Xml
384 * @throws NoSuchAlgorithmException Other error
385 */
386 private boolean startXmpp() throws IOException, XmlPullParserException, NoSuchAlgorithmException {
387 tagWriter.setOutputStream(socket.getOutputStream());
388 tagReader.setInputStream(socket.getInputStream());
389 tagWriter.beginDocument();
390 sendStartStream();
391 Tag nextTag;
392 while ((nextTag = tagReader.readTag()) != null) {
393 if (nextTag.isStart("stream")) {
394 return true;
395 } else {
396 throw new IOException("unknown tag on connect");
397 }
398 }
399 if (socket.isConnected()) {
400 socket.close();
401 }
402 return false;
403 }
404
405 private static class TlsFactoryVerifier {
406 private final SSLSocketFactory factory;
407 private final HostnameVerifier verifier;
408
409 public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
410 this.factory = factory;
411 this.verifier = verifier;
412 if (factory == null || verifier == null) {
413 throw new IOException("could not setup ssl");
414 }
415 }
416 }
417
418 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
419 final SSLContext sc = SSLSocketHelper.getSSLContext();
420 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
421 KeyManager[] keyManager;
422 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
423 keyManager = new KeyManager[]{mKeyManager};
424 } else {
425 keyManager = null;
426 }
427 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()}, mXmppConnectionService.getRNG());
428 final SSLSocketFactory factory = sc.getSocketFactory();
429 final HostnameVerifier verifier;
430 if (mInteractive) {
431 verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
432 } else {
433 verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
434 }
435
436 return new TlsFactoryVerifier(factory, verifier);
437 }
438
439 @Override
440 public void run() {
441 forceCloseSocket();
442 connect();
443 }
444
445 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
446 Tag nextTag = tagReader.readTag();
447 while (nextTag != null && !nextTag.isEnd("stream")) {
448 if (nextTag.isStart("error")) {
449 processStreamError(nextTag);
450 } else if (nextTag.isStart("features")) {
451 processStreamFeatures(nextTag);
452 } else if (nextTag.isStart("proceed")) {
453 switchOverToTls(nextTag);
454 } else if (nextTag.isStart("success")) {
455 final String challenge = tagReader.readElement(nextTag).getContent();
456 try {
457 saslMechanism.getResponse(challenge);
458 } catch (final SaslMechanism.AuthenticationException e) {
459 disconnect(true);
460 Log.e(Config.LOGTAG, String.valueOf(e));
461 }
462 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
463 account.setKey(Account.PINNED_MECHANISM_KEY,
464 String.valueOf(saslMechanism.getPriority()));
465 tagReader.reset();
466 sendStartStream();
467 final Tag tag = tagReader.readTag();
468 if (tag != null && tag.isStart("stream")) {
469 processStream();
470 } else {
471 throw new IOException("server didn't restart stream after successful auth");
472 }
473 break;
474 } else if (nextTag.isStart("failure")) {
475 throw new UnauthorizedException();
476 } else if (nextTag.isStart("challenge")) {
477 final String challenge = tagReader.readElement(nextTag).getContent();
478 final Element response = new Element("response");
479 response.setAttribute("xmlns",
480 "urn:ietf:params:xml:ns:xmpp-sasl");
481 try {
482 response.setContent(saslMechanism.getResponse(challenge));
483 } catch (final SaslMechanism.AuthenticationException e) {
484 // TODO: Send auth abort tag.
485 Log.e(Config.LOGTAG, e.toString());
486 }
487 tagWriter.writeElement(response);
488 } else if (nextTag.isStart("enabled")) {
489 final Element enabled = tagReader.readElement(nextTag);
490 if ("true".equals(enabled.getAttribute("resume"))) {
491 this.streamId = enabled.getAttribute("id");
492 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
493 + ": stream management(" + smVersion
494 + ") enabled (resumable)");
495 } else {
496 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
497 + ": stream management(" + smVersion + ") enabled");
498 }
499 this.stanzasReceived = 0;
500 final RequestPacket r = new RequestPacket(smVersion);
501 tagWriter.writeStanzaAsync(r);
502 } else if (nextTag.isStart("resumed")) {
503 lastPacketReceived = SystemClock.elapsedRealtime();
504 final Element resumed = tagReader.readElement(nextTag);
505 final String h = resumed.getAttribute("h");
506 try {
507 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
508 synchronized (this.mStanzaQueue) {
509 final int serverCount = Integer.parseInt(h);
510 if (serverCount != stanzasSent) {
511 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
512 + ": session resumed with lost packages");
513 stanzasSent = serverCount;
514 } else {
515 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
516 }
517 acknowledgeStanzaUpTo(serverCount);
518 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
519 failedStanzas.add(mStanzaQueue.valueAt(i));
520 }
521 mStanzaQueue.clear();
522 }
523 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
524 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
525 if (packet instanceof MessagePacket) {
526 MessagePacket message = (MessagePacket) packet;
527 mXmppConnectionService.markMessage(account,
528 message.getTo().toBareJid(),
529 message.getId(),
530 Message.STATUS_UNSEND);
531 }
532 sendPacket(packet);
533 }
534 } catch (final NumberFormatException ignored) {
535 }
536 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
537 changeStatus(Account.State.ONLINE);
538 } else if (nextTag.isStart("r")) {
539 tagReader.readElement(nextTag);
540 if (Config.EXTENDED_SM_LOGGING) {
541 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
542 }
543 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
544 tagWriter.writeStanzaAsync(ack);
545 } else if (nextTag.isStart("a")) {
546 final Element ack = tagReader.readElement(nextTag);
547 lastPacketReceived = SystemClock.elapsedRealtime();
548 try {
549 synchronized (this.mStanzaQueue) {
550 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
551 acknowledgeStanzaUpTo(serverSequence);
552 }
553 } catch (NumberFormatException | NullPointerException e) {
554 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
555 }
556 } else if (nextTag.isStart("failed")) {
557 Element failed = tagReader.readElement(nextTag);
558 try {
559 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
560 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed but server acknowledged stanza #"+serverCount);
561 synchronized (this.mStanzaQueue) {
562 acknowledgeStanzaUpTo(serverCount);
563 }
564 } catch (NumberFormatException | NullPointerException e) {
565 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed");
566 }
567 resetStreamId();
568 if (account.getStatus() != Account.State.ONLINE) {
569 sendBindRequest();
570 }
571 } else if (nextTag.isStart("iq")) {
572 processIq(nextTag);
573 } else if (nextTag.isStart("message")) {
574 processMessage(nextTag);
575 } else if (nextTag.isStart("presence")) {
576 processPresence(nextTag);
577 }
578 nextTag = tagReader.readTag();
579 }
580 }
581
582 private void acknowledgeStanzaUpTo(int serverCount) {
583 for (int i = 0; i < mStanzaQueue.size(); ++i) {
584 if (serverCount >= mStanzaQueue.keyAt(i)) {
585 if (Config.EXTENDED_SM_LOGGING) {
586 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
587 }
588 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
589 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
590 MessagePacket packet = (MessagePacket) stanza;
591 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
592 }
593 mStanzaQueue.removeAt(i);
594 i--;
595 }
596 }
597 }
598
599 private Element processPacket(final Tag currentTag, final int packetType)
600 throws XmlPullParserException, IOException {
601 Element element;
602 switch (packetType) {
603 case PACKET_IQ:
604 element = new IqPacket();
605 break;
606 case PACKET_MESSAGE:
607 element = new MessagePacket();
608 break;
609 case PACKET_PRESENCE:
610 element = new PresencePacket();
611 break;
612 default:
613 return null;
614 }
615 element.setAttributes(currentTag.getAttributes());
616 Tag nextTag = tagReader.readTag();
617 if (nextTag == null) {
618 throw new IOException("interrupted mid tag");
619 }
620 while (!nextTag.isEnd(element.getName())) {
621 if (!nextTag.isNo()) {
622 final Element child = tagReader.readElement(nextTag);
623 final String type = currentTag.getAttribute("type");
624 if (packetType == PACKET_IQ
625 && "jingle".equals(child.getName())
626 && ("set".equalsIgnoreCase(type) || "get"
627 .equalsIgnoreCase(type))) {
628 element = new JinglePacket();
629 element.setAttributes(currentTag.getAttributes());
630 }
631 element.addChild(child);
632 }
633 nextTag = tagReader.readTag();
634 if (nextTag == null) {
635 throw new IOException("interrupted mid tag");
636 }
637 }
638 if (stanzasReceived == Integer.MAX_VALUE) {
639 resetStreamId();
640 throw new IOException("time to restart the session. cant handle >2 billion pcks");
641 }
642 ++stanzasReceived;
643 lastPacketReceived = SystemClock.elapsedRealtime();
644 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
645 Log.d(Config.LOGTAG,"[background stanza] "+element);
646 }
647 return element;
648 }
649
650 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
651 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
652
653 if (packet.getId() == null) {
654 return; // an iq packet without id is definitely invalid
655 }
656
657 if (packet instanceof JinglePacket) {
658 if (this.jingleListener != null) {
659 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
660 }
661 } else {
662 OnIqPacketReceived callback = null;
663 synchronized (this.packetCallbacks) {
664 if (packetCallbacks.containsKey(packet.getId())) {
665 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
666 // Packets to the server should have responses from the server
667 if (packetCallbackDuple.first.toServer(account)) {
668 if (packet.fromServer(account) || mServerIdentity == Identity.FACEBOOK) {
669 callback = packetCallbackDuple.second;
670 packetCallbacks.remove(packet.getId());
671 } else {
672 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
673 }
674 } else {
675 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
676 callback = packetCallbackDuple.second;
677 packetCallbacks.remove(packet.getId());
678 } else {
679 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
680 }
681 }
682 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
683 callback = this.unregisteredIqListener;
684 }
685 }
686 if (callback != null) {
687 callback.onIqPacketReceived(account,packet);
688 }
689 }
690 }
691
692 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
693 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
694 this.messageListener.onMessagePacketReceived(account, packet);
695 }
696
697 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
698 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
699 this.presenceListener.onPresencePacketReceived(account, packet);
700 }
701
702 private void sendStartTLS() throws IOException {
703 final Tag startTLS = Tag.empty("starttls");
704 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
705 tagWriter.writeTag(startTLS);
706 }
707
708
709
710 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
711 tagReader.readTag();
712 try {
713 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
714 final InetAddress address = socket == null ? null : socket.getInetAddress();
715
716 if (address == null) {
717 throw new IOException("could not setup ssl");
718 }
719
720 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
721
722 if (sslSocket == null) {
723 throw new IOException("could not initialize ssl socket");
724 }
725
726 SSLSocketHelper.setSecurity(sslSocket);
727
728 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
729 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
730 throw new SecurityException();
731 }
732 tagReader.setInputStream(sslSocket.getInputStream());
733 tagWriter.setOutputStream(sslSocket.getOutputStream());
734 sendStartStream();
735 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
736 features.encryptionEnabled = true;
737 final Tag tag = tagReader.readTag();
738 if (tag != null && tag.isStart("stream")) {
739 processStream();
740 } else {
741 throw new IOException("server didn't restart stream after STARTTLS");
742 }
743 sslSocket.close();
744 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
745 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
746 throw new SecurityException();
747 }
748 }
749
750 private void processStreamFeatures(final Tag currentTag)
751 throws XmlPullParserException, IOException {
752 this.streamFeatures = tagReader.readElement(currentTag);
753 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
754 sendStartTLS();
755 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
756 if (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS) {
757 sendRegistryRequest();
758 } else {
759 throw new IncompatibleServerException();
760 }
761 } else if (!this.streamFeatures.hasChild("register")
762 && account.isOptionSet(Account.OPTION_REGISTER)) {
763 forceCloseSocket();
764 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
765 } else if (this.streamFeatures.hasChild("mechanisms")
766 && shouldAuthenticate
767 && (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS)) {
768 authenticate();
769 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
770 if (Config.EXTENDED_SM_LOGGING) {
771 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
772 }
773 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
774 this.tagWriter.writeStanzaAsync(resume);
775 } else if (needsBinding) {
776 if (this.streamFeatures.hasChild("bind")) {
777 sendBindRequest();
778 } else {
779 throw new IncompatibleServerException();
780 }
781 }
782 }
783
784 private void authenticate() throws IOException {
785 final List<String> mechanisms = extractMechanisms(streamFeatures
786 .findChild("mechanisms"));
787 final Element auth = new Element("auth");
788 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
789 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
790 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
791 } else if (mechanisms.contains("SCRAM-SHA-1")) {
792 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
793 } else if (mechanisms.contains("PLAIN")) {
794 saslMechanism = new Plain(tagWriter, account);
795 } else if (mechanisms.contains("DIGEST-MD5")) {
796 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
797 }
798 if (saslMechanism != null) {
799 final JSONObject keys = account.getKeys();
800 try {
801 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
802 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) {
803 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
804 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
805 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
806 "). Possible downgrade attack?");
807 throw new SecurityException();
808 }
809 } catch (final JSONException e) {
810 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
811 }
812 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
813 auth.setAttribute("mechanism", saslMechanism.getMechanism());
814 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
815 auth.setContent(saslMechanism.getClientFirstMessage());
816 }
817 tagWriter.writeElement(auth);
818 } else {
819 throw new IncompatibleServerException();
820 }
821 }
822
823 private List<String> extractMechanisms(final Element stream) {
824 final ArrayList<String> mechanisms = new ArrayList<>(stream
825 .getChildren().size());
826 for (final Element child : stream.getChildren()) {
827 mechanisms.add(child.getContent());
828 }
829 return mechanisms;
830 }
831
832 private void sendRegistryRequest() {
833 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
834 register.query("jabber:iq:register");
835 register.setTo(account.getServer());
836 sendIqPacket(register, new OnIqPacketReceived() {
837
838 @Override
839 public void onIqPacketReceived(final Account account, final IqPacket packet) {
840 boolean failed = false;
841 if (packet.getType() == IqPacket.TYPE.RESULT
842 && packet.query().hasChild("username")
843 && (packet.query().hasChild("password"))) {
844 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
845 final Element username = new Element("username").setContent(account.getUsername());
846 final Element password = new Element("password").setContent(account.getPassword());
847 register.query("jabber:iq:register").addChild(username);
848 register.query().addChild(password);
849 sendIqPacket(register, registrationResponseListener);
850 } else if (packet.getType() == IqPacket.TYPE.RESULT
851 && (packet.query().hasChild("x", "jabber:x:data"))) {
852 final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
853 final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
854 final String id = packet.getId();
855
856 Bitmap captcha = null;
857 if (blob != null) {
858 try {
859 final String base64Blob = blob.getContent();
860 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
861 InputStream stream = new ByteArrayInputStream(strBlob);
862 captcha = BitmapFactory.decodeStream(stream);
863 } catch (Exception e) {
864 //ignored
865 }
866 } else {
867 try {
868 Field url = data.getFieldByName("url");
869 String urlString = url.findChildContent("value");
870 URL uri = new URL(urlString);
871 captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
872 } catch (IOException e) {
873 Log.e(Config.LOGTAG, e.toString());
874 }
875 }
876
877 if (captcha != null) {
878 failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
879 }
880 } else {
881 failed = true;
882 }
883
884 if (failed) {
885 final Element instructions = packet.query().findChild("instructions");
886 setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
887 }
888 }
889 });
890 }
891
892 private void setAccountCreationFailed(String instructions) {
893 changeStatus(Account.State.REGISTRATION_FAILED);
894 disconnect(true);
895 Log.d(Config.LOGTAG, account.getJid().toBareJid()
896 + ": could not register. instructions are"
897 + instructions);
898 }
899
900 public void resetEverything() {
901 resetAttemptCount();
902 resetStreamId();
903 clearIqCallbacks();
904 mStanzaQueue.clear();
905 synchronized (this.disco) {
906 disco.clear();
907 }
908 }
909
910 private void sendBindRequest() {
911 while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
912 try {
913 Thread.sleep(500);
914 } catch (final InterruptedException ignored) {
915 }
916 }
917 needsBinding = false;
918 clearIqCallbacks();
919 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
920 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
921 .addChild("resource").setContent(account.getResource());
922 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
923 @Override
924 public void onIqPacketReceived(final Account account, final IqPacket packet) {
925 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
926 return;
927 }
928 final Element bind = packet.findChild("bind");
929 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
930 final Element jid = bind.findChild("jid");
931 if (jid != null && jid.getContent() != null) {
932 try {
933 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
934 if (streamFeatures.hasChild("session")
935 && !streamFeatures.findChild("session").hasChild("optional")) {
936 sendStartSession();
937 } else {
938 sendPostBindInitialization();
939 }
940 return;
941 } catch (final InvalidJidException e) {
942 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server reported invalid jid ("+jid.getContent()+") on bind");
943 }
944 } else {
945 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
946 }
947 } else {
948 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
949 }
950 forceCloseSocket();
951 changeStatus(Account.State.BIND_FAILURE);
952 }
953 });
954 }
955
956 private void clearIqCallbacks() {
957 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
958 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
959 synchronized (this.packetCallbacks) {
960 if (this.packetCallbacks.size() == 0) {
961 return;
962 }
963 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
964 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
965 while (iterator.hasNext()) {
966 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
967 callbacks.add(entry.second);
968 iterator.remove();
969 }
970 }
971 for(OnIqPacketReceived callback : callbacks) {
972 callback.onIqPacketReceived(account,failurePacket);
973 }
974 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
975 }
976
977 public void sendDiscoTimeout() {
978 if (mWaitForDisco.compareAndSet(true, false)) {
979 finalizeBind();
980 }
981 }
982
983 private void sendStartSession() {
984 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending legacy session to outdated server");
985 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
986 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
987 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
988 @Override
989 public void onIqPacketReceived(Account account, IqPacket packet) {
990 if (packet.getType() == IqPacket.TYPE.RESULT) {
991 sendPostBindInitialization();
992 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
993 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
994 disconnect(true);
995 }
996 }
997 });
998 }
999
1000 private void sendPostBindInitialization() {
1001 smVersion = 0;
1002 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1003 smVersion = 3;
1004 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1005 smVersion = 2;
1006 }
1007 if (smVersion != 0) {
1008 synchronized (this.mStanzaQueue) {
1009 final EnablePacket enable = new EnablePacket(smVersion);
1010 tagWriter.writeStanzaAsync(enable);
1011 stanzasSent = 0;
1012 mStanzaQueue.clear();
1013 }
1014 }
1015 features.carbonsEnabled = false;
1016 features.blockListRequested = false;
1017 synchronized (this.disco) {
1018 this.disco.clear();
1019 }
1020 mPendingServiceDiscoveries.set(0);
1021 mWaitForDisco.set(mServerIdentity != Identity.NIMBUZZ);
1022 lastDiscoStarted = SystemClock.elapsedRealtime();
1023 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
1024 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1025 Element caps = streamFeatures.findChild("c");
1026 final String hash = caps == null ? null : caps.getAttribute("hash");
1027 final String ver = caps == null ? null : caps.getAttribute("ver");
1028 ServiceDiscoveryResult discoveryResult = null;
1029 if (hash != null && ver != null) {
1030 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1031 }
1032 if (discoveryResult == null) {
1033 sendServiceDiscoveryInfo(account.getServer());
1034 } else {
1035 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server caps came from cache");
1036 disco.put(account.getServer(), discoveryResult);
1037 }
1038 sendServiceDiscoveryInfo(account.getJid().toBareJid());
1039 sendServiceDiscoveryItems(account.getServer());
1040
1041 if (!mWaitForDisco.get()) {
1042 finalizeBind();
1043 }
1044 this.lastSessionStarted = SystemClock.elapsedRealtime();
1045 }
1046
1047 private void sendServiceDiscoveryInfo(final Jid jid) {
1048 mPendingServiceDiscoveries.incrementAndGet();
1049 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1050 iq.setTo(jid);
1051 iq.query("http://jabber.org/protocol/disco#info");
1052 this.sendIqPacket(iq, new OnIqPacketReceived() {
1053
1054 @Override
1055 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1056 if (packet.getType() == IqPacket.TYPE.RESULT) {
1057 boolean advancedStreamFeaturesLoaded;
1058 synchronized (XmppConnection.this.disco) {
1059 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1060 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1061 if (mServerIdentity == Identity.UNKNOWN && id.getType().equals("im") &&
1062 id.getCategory().equals("server") && id.getName() != null &&
1063 jid.equals(account.getServer())) {
1064 switch (id.getName()) {
1065 case "Prosody":
1066 mServerIdentity = Identity.PROSODY;
1067 break;
1068 case "ejabberd":
1069 mServerIdentity = Identity.EJABBERD;
1070 break;
1071 case "Slack-XMPP":
1072 mServerIdentity = Identity.SLACK;
1073 break;
1074 }
1075 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server name: " + id.getName());
1076 }
1077 }
1078 if (jid.equals(account.getServer())) {
1079 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1080 }
1081 disco.put(jid, result);
1082 advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
1083 && disco.containsKey(account.getJid().toBareJid());
1084 }
1085 if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
1086 enableAdvancedStreamFeatures();
1087 }
1088 } else {
1089 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
1090 }
1091 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1092 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1093 && mWaitForDisco.compareAndSet(true, false)) {
1094 finalizeBind();
1095 }
1096 }
1097 }
1098 });
1099 }
1100
1101 private void finalizeBind() {
1102 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
1103 if (bindListener != null) {
1104 bindListener.onBind(account);
1105 }
1106 changeStatus(Account.State.ONLINE);
1107 }
1108
1109 private void enableAdvancedStreamFeatures() {
1110 if (getFeatures().carbons() && !features.carbonsEnabled) {
1111 sendEnableCarbons();
1112 }
1113 if (getFeatures().blocking() && !features.blockListRequested) {
1114 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
1115 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1116 }
1117 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1118 listener.onAdvancedStreamFeaturesAvailable(account);
1119 }
1120 }
1121
1122 private void sendServiceDiscoveryItems(final Jid server) {
1123 mPendingServiceDiscoveries.incrementAndGet();
1124 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1125 iq.setTo(server.toDomainJid());
1126 iq.query("http://jabber.org/protocol/disco#items");
1127 this.sendIqPacket(iq, new OnIqPacketReceived() {
1128
1129 @Override
1130 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1131 if (packet.getType() == IqPacket.TYPE.RESULT) {
1132 final List<Element> elements = packet.query().getChildren();
1133 for (final Element element : elements) {
1134 if (element.getName().equals("item")) {
1135 final Jid jid = element.getAttributeAsJid("jid");
1136 if (jid != null && !jid.equals(account.getServer())) {
1137 sendServiceDiscoveryInfo(jid);
1138 }
1139 }
1140 }
1141 } else {
1142 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
1143 }
1144 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1145 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1146 && mWaitForDisco.compareAndSet(true, false)) {
1147 finalizeBind();
1148 }
1149 }
1150 }
1151 });
1152 }
1153
1154 private void sendEnableCarbons() {
1155 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1156 iq.addChild("enable", "urn:xmpp:carbons:2");
1157 this.sendIqPacket(iq, new OnIqPacketReceived() {
1158
1159 @Override
1160 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1161 if (!packet.hasChild("error")) {
1162 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1163 + ": successfully enabled carbons");
1164 features.carbonsEnabled = true;
1165 } else {
1166 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1167 + ": error enableing carbons " + packet.toString());
1168 }
1169 }
1170 });
1171 }
1172
1173 private void processStreamError(final Tag currentTag)
1174 throws XmlPullParserException, IOException {
1175 final Element streamError = tagReader.readElement(currentTag);
1176 if (streamError == null) {
1177 return;
1178 }
1179 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
1180 if (streamError.hasChild("conflict")) {
1181 final String resource = account.getResource().split("\\.")[0];
1182 account.setResource(resource + "." + nextRandomId());
1183 Log.d(Config.LOGTAG,
1184 account.getJid().toBareJid() + ": switching resource due to conflict ("
1185 + account.getResource() + ")");
1186 } else if (streamError.hasChild("host-unknown")) {
1187 changeStatus(Account.State.HOST_UNKNOWN);
1188 }
1189 forceCloseSocket();
1190 }
1191
1192 private void sendStartStream() throws IOException {
1193 final Tag stream = Tag.start("stream:stream");
1194 stream.setAttribute("to", account.getServer().toString());
1195 stream.setAttribute("version", "1.0");
1196 stream.setAttribute("xml:lang", "en");
1197 stream.setAttribute("xmlns", "jabber:client");
1198 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1199 tagWriter.writeTag(stream);
1200 }
1201
1202 private String nextRandomId() {
1203 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
1204 }
1205
1206 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1207 packet.setFrom(account.getJid());
1208 return this.sendUnmodifiedIqPacket(packet, callback);
1209 }
1210
1211 private synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1212 if (packet.getId() == null) {
1213 final String id = nextRandomId();
1214 packet.setAttribute("id", id);
1215 }
1216 if (callback != null) {
1217 synchronized (this.packetCallbacks) {
1218 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1219 }
1220 }
1221 this.sendPacket(packet);
1222 return packet.getId();
1223 }
1224
1225 public void sendMessagePacket(final MessagePacket packet) {
1226 this.sendPacket(packet);
1227 }
1228
1229 public void sendPresencePacket(final PresencePacket packet) {
1230 this.sendPacket(packet);
1231 }
1232
1233 private synchronized void sendPacket(final AbstractStanza packet) {
1234 if (stanzasSent == Integer.MAX_VALUE) {
1235 resetStreamId();
1236 disconnect(true);
1237 return;
1238 }
1239 synchronized (this.mStanzaQueue) {
1240 tagWriter.writeStanzaAsync(packet);
1241 if (packet instanceof AbstractAcknowledgeableStanza) {
1242 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1243 ++stanzasSent;
1244 this.mStanzaQueue.append(stanzasSent, stanza);
1245 if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
1246 if (Config.EXTENDED_SM_LOGGING) {
1247 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1248 }
1249 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1250 }
1251 }
1252 }
1253 }
1254
1255 public void sendPing() {
1256 if (!r()) {
1257 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1258 iq.setFrom(account.getJid());
1259 iq.addChild("ping", "urn:xmpp:ping");
1260 this.sendIqPacket(iq, null);
1261 }
1262 this.lastPingSent = SystemClock.elapsedRealtime();
1263 }
1264
1265 public void setOnMessagePacketReceivedListener(
1266 final OnMessagePacketReceived listener) {
1267 this.messageListener = listener;
1268 }
1269
1270 public void setOnUnregisteredIqPacketReceivedListener(
1271 final OnIqPacketReceived listener) {
1272 this.unregisteredIqListener = listener;
1273 }
1274
1275 public void setOnPresencePacketReceivedListener(
1276 final OnPresencePacketReceived listener) {
1277 this.presenceListener = listener;
1278 }
1279
1280 public void setOnJinglePacketReceivedListener(
1281 final OnJinglePacketReceived listener) {
1282 this.jingleListener = listener;
1283 }
1284
1285 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1286 this.statusListener = listener;
1287 }
1288
1289 public void setOnBindListener(final OnBindListener listener) {
1290 this.bindListener = listener;
1291 }
1292
1293 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1294 this.acknowledgedListener = listener;
1295 }
1296
1297 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1298 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1299 this.advancedStreamFeaturesLoadedListeners.add(listener);
1300 }
1301 }
1302
1303 public void waitForPush() {
1304 if (tagWriter.isActive()) {
1305 tagWriter.finish();
1306 new Thread(new Runnable() {
1307 @Override
1308 public void run() {
1309 try {
1310 while(!tagWriter.finished()) {
1311 Thread.sleep(10);
1312 }
1313 socket.close();
1314 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closed tcp without closing stream");
1315 } catch (IOException | InterruptedException e) {
1316 return;
1317 }
1318 }
1319 }).start();
1320 } else {
1321 forceCloseSocket();
1322 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": closed tcp without closing stream (no waiting)");
1323 }
1324 }
1325
1326 private void forceCloseSocket() {
1327 if (socket != null) {
1328 try {
1329 socket.close();
1330 } catch (IOException e) {
1331 e.printStackTrace();
1332 }
1333 }
1334 }
1335
1336 public void interrupt() {
1337 Thread.currentThread().interrupt();
1338 }
1339
1340 public void disconnect(final boolean force) {
1341 interrupt();
1342 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
1343 if (force) {
1344 tagWriter.forceClose();
1345 forceCloseSocket();
1346 } else {
1347 if (tagWriter.isActive()) {
1348 tagWriter.finish();
1349 try {
1350 int i = 0;
1351 boolean warned = false;
1352 while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
1353 if (!warned) {
1354 Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
1355 warned = true;
1356 }
1357 Thread.sleep(200);
1358 i++;
1359 }
1360 if (warned) {
1361 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
1362 }
1363 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
1364 tagWriter.writeTag(Tag.end("stream:stream"));
1365 } catch (final IOException e) {
1366 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
1367 } catch (final InterruptedException e) {
1368 Log.d(Config.LOGTAG, "interrupted");
1369 }
1370 }
1371 }
1372 }
1373
1374 public void resetStreamId() {
1375 this.streamId = null;
1376 }
1377
1378 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1379 synchronized (this.disco) {
1380 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1381 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1382 if (cursor.getValue().getFeatures().contains(feature)) {
1383 items.add(cursor);
1384 }
1385 }
1386 return items;
1387 }
1388 }
1389
1390 public Jid findDiscoItemByFeature(final String feature) {
1391 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1392 if (items.size() >= 1) {
1393 return items.get(0).getKey();
1394 }
1395 return null;
1396 }
1397
1398 public boolean r() {
1399 if (getFeatures().sm()) {
1400 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1401 return true;
1402 } else {
1403 return false;
1404 }
1405 }
1406
1407 public String getMucServer() {
1408 synchronized (this.disco) {
1409 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1410 final ServiceDiscoveryResult value = cursor.getValue();
1411 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1412 && !value.getFeatures().contains("jabber:iq:gateway")
1413 && !value.hasIdentity("conference", "irc")) {
1414 return cursor.getKey().toString();
1415 }
1416 }
1417 }
1418 return null;
1419 }
1420
1421 public int getTimeToNextAttempt() {
1422 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1423 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1424 return interval - secondsSinceLast;
1425 }
1426
1427 public int getAttempt() {
1428 return this.attempt;
1429 }
1430
1431 public Features getFeatures() {
1432 return this.features;
1433 }
1434
1435 public long getLastSessionEstablished() {
1436 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1437 return System.currentTimeMillis() - diff;
1438 }
1439
1440 public long getLastConnect() {
1441 return this.lastConnect;
1442 }
1443
1444 public long getLastPingSent() {
1445 return this.lastPingSent;
1446 }
1447
1448 public long getLastDiscoStarted() {
1449 return this.lastDiscoStarted;
1450 }
1451 public long getLastPacketReceived() {
1452 return this.lastPacketReceived;
1453 }
1454
1455 public void sendActive() {
1456 this.sendPacket(new ActivePacket());
1457 }
1458
1459 public void sendInactive() {
1460 this.sendPacket(new InactivePacket());
1461 }
1462
1463 public void resetAttemptCount() {
1464 this.attempt = 0;
1465 this.lastConnect = 0;
1466 }
1467
1468 public void setInteractive(boolean interactive) {
1469 this.mInteractive = interactive;
1470 }
1471
1472 public Identity getServerIdentity() {
1473 return mServerIdentity;
1474 }
1475
1476 private class UnauthorizedException extends IOException {
1477
1478 }
1479
1480 private class SecurityException extends IOException {
1481
1482 }
1483
1484 private class IncompatibleServerException extends IOException {
1485
1486 }
1487
1488 public enum Identity {
1489 FACEBOOK,
1490 SLACK,
1491 EJABBERD,
1492 PROSODY,
1493 NIMBUZZ,
1494 UNKNOWN
1495 }
1496
1497 public class Features {
1498 XmppConnection connection;
1499 private boolean carbonsEnabled = false;
1500 private boolean encryptionEnabled = false;
1501 private boolean blockListRequested = false;
1502
1503 public Features(final XmppConnection connection) {
1504 this.connection = connection;
1505 }
1506
1507 private boolean hasDiscoFeature(final Jid server, final String feature) {
1508 synchronized (XmppConnection.this.disco) {
1509 return connection.disco.containsKey(server) &&
1510 connection.disco.get(server).getFeatures().contains(feature);
1511 }
1512 }
1513
1514 public boolean carbons() {
1515 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1516 }
1517
1518 public boolean blocking() {
1519 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1520 }
1521
1522 public boolean register() {
1523 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1524 }
1525
1526 public boolean sm() {
1527 return streamId != null
1528 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1529 }
1530
1531 public boolean csi() {
1532 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1533 }
1534
1535 public boolean pep() {
1536 synchronized (XmppConnection.this.disco) {
1537 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1538 return info != null && info.hasIdentity("pubsub", "pep");
1539 }
1540 }
1541
1542 public boolean pepPersistent() {
1543 synchronized (XmppConnection.this.disco) {
1544 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1545 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1546 }
1547 }
1548
1549 public boolean mam() {
1550 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")
1551 || hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1552 }
1553
1554 public boolean push() {
1555 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:push:0")
1556 || hasDiscoFeature(account.getServer(), "urn:xmpp:push:0");
1557 }
1558
1559 public boolean rosterVersioning() {
1560 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1561 }
1562
1563 public void setBlockListRequested(boolean value) {
1564 this.blockListRequested = value;
1565 }
1566
1567 public boolean httpUpload(long filesize) {
1568 if (Config.DISABLE_HTTP_UPLOAD) {
1569 return false;
1570 } else {
1571 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1572 if (items.size() > 0) {
1573 try {
1574 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1575 if(filesize <= maxsize) {
1576 return true;
1577 } else {
1578 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": http upload is not available for files with size "+filesize+" (max is "+maxsize+")");
1579 return false;
1580 }
1581 } catch (Exception e) {
1582 return true;
1583 }
1584 } else {
1585 return false;
1586 }
1587 }
1588 }
1589
1590 public long getMaxHttpUploadSize() {
1591 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1592 if (items.size() > 0) {
1593 try {
1594 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1595 } catch (Exception e) {
1596 return -1;
1597 }
1598 } else {
1599 return -1;
1600 }
1601 }
1602 }
1603
1604 private IqGenerator getIqGenerator() {
1605 return mXmppConnectionService.getIqGenerator();
1606 }
1607}