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