1package eu.siacs.conversations.xmpp;
2
3import android.os.Bundle;
4import android.os.Parcelable;
5import android.os.PowerManager;
6import android.os.PowerManager.WakeLock;
7import android.os.SystemClock;
8import android.util.Log;
9import android.util.Pair;
10import android.util.SparseArray;
11
12import org.apache.http.conn.ssl.StrictHostnameVerifier;
13import org.json.JSONException;
14import org.json.JSONObject;
15import org.xmlpull.v1.XmlPullParserException;
16
17import java.io.IOException;
18import java.io.InputStream;
19import java.io.OutputStream;
20import java.math.BigInteger;
21import java.net.ConnectException;
22import java.net.IDN;
23import java.net.InetAddress;
24import java.net.InetSocketAddress;
25import java.net.Socket;
26import java.net.UnknownHostException;
27import java.security.KeyManagementException;
28import java.security.NoSuchAlgorithmException;
29import java.util.ArrayList;
30import java.util.Arrays;
31import java.util.Collection;
32import java.util.HashMap;
33import java.util.Hashtable;
34import java.util.Iterator;
35import java.util.LinkedList;
36import java.util.List;
37import java.util.Map.Entry;
38
39import javax.net.ssl.HostnameVerifier;
40import javax.net.ssl.SSLContext;
41import javax.net.ssl.SSLSocket;
42import javax.net.ssl.SSLSocketFactory;
43import javax.net.ssl.X509TrustManager;
44
45import eu.siacs.conversations.Config;
46import eu.siacs.conversations.crypto.sasl.DigestMd5;
47import eu.siacs.conversations.crypto.sasl.Plain;
48import eu.siacs.conversations.crypto.sasl.SaslMechanism;
49import eu.siacs.conversations.crypto.sasl.ScramSha1;
50import eu.siacs.conversations.entities.Account;
51import eu.siacs.conversations.generator.IqGenerator;
52import eu.siacs.conversations.services.XmppConnectionService;
53import eu.siacs.conversations.utils.CryptoHelper;
54import eu.siacs.conversations.utils.DNSHelper;
55import eu.siacs.conversations.utils.Xmlns;
56import eu.siacs.conversations.xml.Element;
57import eu.siacs.conversations.xml.Tag;
58import eu.siacs.conversations.xml.TagWriter;
59import eu.siacs.conversations.xml.XmlReader;
60import eu.siacs.conversations.xmpp.jid.InvalidJidException;
61import eu.siacs.conversations.xmpp.jid.Jid;
62import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
63import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
64import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
65import eu.siacs.conversations.xmpp.stanzas.IqPacket;
66import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
67import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
68import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
69import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
70import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
71import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
72import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
73import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
74
75public class XmppConnection implements Runnable {
76
77 private static final int PACKET_IQ = 0;
78 private static final int PACKET_MESSAGE = 1;
79 private static final int PACKET_PRESENCE = 2;
80 protected Account account;
81 private final WakeLock wakeLock;
82 private Socket socket;
83 private XmlReader tagReader;
84 private TagWriter tagWriter;
85 private final Features features = new Features(this);
86 private boolean shouldBind = true;
87 private boolean shouldAuthenticate = true;
88 private Element streamFeatures;
89 private final HashMap<Jid, Info> disco = new HashMap<>();
90
91 private String streamId = null;
92 private int smVersion = 3;
93 private final SparseArray<String> mStanzaReceipts = new SparseArray<>();
94
95 private int stanzasReceived = 0;
96 private int stanzasSent = 0;
97 private long lastPacketReceived = 0;
98 private long lastPingSent = 0;
99 private long lastConnect = 0;
100 private long lastSessionStarted = 0;
101 private int attempt = 0;
102 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
103 private OnPresencePacketReceived presenceListener = null;
104 private OnJinglePacketReceived jingleListener = null;
105 private OnIqPacketReceived unregisteredIqListener = null;
106 private OnMessagePacketReceived messageListener = null;
107 private OnStatusChanged statusListener = null;
108 private OnBindListener bindListener = null;
109 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
110 private OnMessageAcknowledged acknowledgedListener = null;
111 private XmppConnectionService mXmppConnectionService = null;
112
113 private SaslMechanism saslMechanism;
114
115 public XmppConnection(final Account account, final XmppConnectionService service) {
116 this.account = account;
117 this.wakeLock = service.getPowerManager().newWakeLock(
118 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
119 tagWriter = new TagWriter();
120 mXmppConnectionService = service;
121 }
122
123 protected void changeStatus(final Account.State nextStatus) {
124 if (account.getStatus() != nextStatus) {
125 if ((nextStatus == Account.State.OFFLINE)
126 && (account.getStatus() != Account.State.CONNECTING)
127 && (account.getStatus() != Account.State.ONLINE)
128 && (account.getStatus() != Account.State.DISABLED)) {
129 return;
130 }
131 if (nextStatus == Account.State.ONLINE) {
132 this.attempt = 0;
133 }
134 account.setStatus(nextStatus);
135 if (statusListener != null) {
136 statusListener.onStatusChanged(account);
137 }
138 }
139 }
140
141 protected void connect() {
142 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
143 features.encryptionEnabled = false;
144 lastConnect = SystemClock.elapsedRealtime();
145 lastPingSent = SystemClock.elapsedRealtime();
146 this.attempt++;
147 try {
148 shouldAuthenticate = shouldBind = !account.isOptionSet(Account.OPTION_REGISTER);
149 tagReader = new XmlReader(wakeLock);
150 tagWriter = new TagWriter();
151 this.changeStatus(Account.State.CONNECTING);
152 if (DNSHelper.isIp(account.getServer().toString())) {
153 socket = new Socket();
154 try {
155 socket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
156 } catch (IOException e) {
157 throw new UnknownHostException();
158 }
159 } else {
160 final Bundle result = DNSHelper.getSRVRecord(account.getServer());
161 if (result == null) {
162 throw new IOException("unhandled exception in DNS resolver");
163 }
164 final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
165 if ("timeout".equals(result.getString("error"))) {
166 throw new IOException("timeout in dns");
167 } else if (values != null) {
168 int i = 0;
169 boolean socketError = true;
170 while (socketError && values.size() > i) {
171 final Bundle namePort = (Bundle) values.get(i);
172 try {
173 String srvRecordServer;
174 try {
175 srvRecordServer = IDN.toASCII(namePort.getString("name"));
176 } catch (final IllegalArgumentException e) {
177 // TODO: Handle me?`
178 srvRecordServer = "";
179 }
180 final int srvRecordPort = namePort.getInt("port");
181 final String srvIpServer = namePort.getString("ip");
182 final InetSocketAddress addr;
183 if (srvIpServer != null) {
184 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
185 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
186 + ": using values from dns " + srvRecordServer
187 + "[" + srvIpServer + "]:" + srvRecordPort);
188 } else {
189 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
190 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
191 + ": using values from dns "
192 + srvRecordServer + ":" + srvRecordPort);
193 }
194 socket = new Socket();
195 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
196 socketError = false;
197 } catch (final Throwable e) {
198 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
199 i++;
200 }
201 }
202 if (socketError) {
203 throw new UnknownHostException();
204 }
205 } else {
206 throw new IOException("unhandled exception in DNS resolver");
207 }
208 }
209 final OutputStream out = socket.getOutputStream();
210 tagWriter.setOutputStream(out);
211 final InputStream in = socket.getInputStream();
212 tagReader.setInputStream(in);
213 tagWriter.beginDocument();
214 sendStartStream();
215 Tag nextTag;
216 while ((nextTag = tagReader.readTag()) != null) {
217 if (nextTag.isStart("stream")) {
218 processStream(nextTag);
219 break;
220 } else {
221 throw new IOException("unknown tag on connect");
222 }
223 }
224 if (socket.isConnected()) {
225 socket.close();
226 }
227 } catch (final IncompatibleServerException e) {
228 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
229 } catch (final SecurityException e) {
230 this.changeStatus(Account.State.SECURITY_ERROR);
231 } catch (final UnauthorizedException e) {
232 this.changeStatus(Account.State.UNAUTHORIZED);
233 } catch (final UnknownHostException | ConnectException e) {
234 this.changeStatus(Account.State.SERVER_NOT_FOUND);
235 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
236 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
237 this.changeStatus(Account.State.OFFLINE);
238 this.attempt--; //don't count attempt when reconnecting instantly anyway
239 } finally {
240 if (socket != null) {
241 try {
242 socket.close();
243 } catch (IOException e) {
244
245 }
246 }
247 if (wakeLock.isHeld()) {
248 try {
249 wakeLock.release();
250 } catch (final RuntimeException ignored) {
251 }
252 }
253 }
254 }
255
256 @Override
257 public void run() {
258 try {
259 if (socket != null) {
260 socket.close();
261 }
262 } catch (final IOException ignored) {
263
264 }
265 connect();
266 }
267
268 private void processStream(final Tag currentTag) throws XmlPullParserException,
269 IOException, NoSuchAlgorithmException {
270 Tag nextTag = tagReader.readTag();
271
272 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
273 if (nextTag.isStart("error")) {
274 processStreamError(nextTag);
275 } else if (nextTag.isStart("features")) {
276 processStreamFeatures(nextTag);
277 } else if (nextTag.isStart("proceed")) {
278 switchOverToTls(nextTag);
279 } else if (nextTag.isStart("success")) {
280 final String challenge = tagReader.readElement(nextTag).getContent();
281 try {
282 saslMechanism.getResponse(challenge);
283 } catch (final SaslMechanism.AuthenticationException e) {
284 disconnect(true);
285 Log.e(Config.LOGTAG, String.valueOf(e));
286 }
287 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
288 account.setKey(Account.PINNED_MECHANISM_KEY,
289 String.valueOf(saslMechanism.getPriority()));
290 tagReader.reset();
291 sendStartStream();
292 processStream(tagReader.readTag());
293 break;
294 } else if (nextTag.isStart("failure")) {
295 throw new UnauthorizedException();
296 } else if (nextTag.isStart("challenge")) {
297 final String challenge = tagReader.readElement(nextTag).getContent();
298 final Element response = new Element("response");
299 response.setAttribute("xmlns",
300 "urn:ietf:params:xml:ns:xmpp-sasl");
301 try {
302 response.setContent(saslMechanism.getResponse(challenge));
303 } catch (final SaslMechanism.AuthenticationException e) {
304 // TODO: Send auth abort tag.
305 Log.e(Config.LOGTAG, e.toString());
306 }
307 tagWriter.writeElement(response);
308 } else if (nextTag.isStart("enabled")) {
309 final Element enabled = tagReader.readElement(nextTag);
310 if ("true".equals(enabled.getAttribute("resume"))) {
311 this.streamId = enabled.getAttribute("id");
312 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
313 + ": stream managment(" + smVersion
314 + ") enabled (resumable)");
315 } else {
316 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
317 + ": stream managment(" + smVersion + ") enabled");
318 }
319 this.lastSessionStarted = SystemClock.elapsedRealtime();
320 this.stanzasReceived = 0;
321 final RequestPacket r = new RequestPacket(smVersion);
322 tagWriter.writeStanzaAsync(r);
323 } else if (nextTag.isStart("resumed")) {
324 lastPacketReceived = SystemClock.elapsedRealtime();
325 final Element resumed = tagReader.readElement(nextTag);
326 final String h = resumed.getAttribute("h");
327 try {
328 final int serverCount = Integer.parseInt(h);
329 if (serverCount != stanzasSent) {
330 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
331 + ": session resumed with lost packages");
332 stanzasSent = serverCount;
333 } else {
334 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
335 }
336 acknowledgeStanzaUpTo(serverCount);
337 ArrayList<IqPacket> failedIqPackets = new ArrayList<>();
338 for(int i = 0; i < this.mStanzaReceipts.size(); ++i) {
339 String id = mStanzaReceipts.valueAt(i);
340 Pair<IqPacket,OnIqPacketReceived> pair = id == null ? null : this.packetCallbacks.get(id);
341 if (pair != null) {
342 failedIqPackets.add(pair.first);
343 }
344 }
345 mStanzaReceipts.clear();
346 Log.d(Config.LOGTAG,"resending "+failedIqPackets.size()+" iq stanza");
347 for(IqPacket packet : failedIqPackets) {
348 sendUnmodifiedIqPacket(packet,null);
349 }
350 } catch (final NumberFormatException ignored) {
351 }
352 sendInitialPing();
353 } else if (nextTag.isStart("r")) {
354 tagReader.readElement(nextTag);
355 if (Config.EXTENDED_SM_LOGGING) {
356 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
357 }
358 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
359 tagWriter.writeStanzaAsync(ack);
360 } else if (nextTag.isStart("a")) {
361 final Element ack = tagReader.readElement(nextTag);
362 lastPacketReceived = SystemClock.elapsedRealtime();
363 try {
364 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
365 acknowledgeStanzaUpTo(serverSequence);
366 } catch (NumberFormatException e) {
367 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
368 }
369 } else if (nextTag.isStart("failed")) {
370 tagReader.readElement(nextTag);
371 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
372 streamId = null;
373 if (account.getStatus() != Account.State.ONLINE) {
374 sendBindRequest();
375 }
376 } else if (nextTag.isStart("iq")) {
377 processIq(nextTag);
378 } else if (nextTag.isStart("message")) {
379 processMessage(nextTag);
380 } else if (nextTag.isStart("presence")) {
381 processPresence(nextTag);
382 }
383 nextTag = tagReader.readTag();
384 }
385 if (account.getStatus() == Account.State.ONLINE) {
386 account. setStatus(Account.State.OFFLINE);
387 if (statusListener != null) {
388 statusListener.onStatusChanged(account);
389 }
390 }
391 }
392
393 private void acknowledgeStanzaUpTo(int serverCount) {
394 for (int i = 0; i < mStanzaReceipts.size(); ++i) {
395 if (serverCount >= mStanzaReceipts.keyAt(i)) {
396 if (Config.EXTENDED_SM_LOGGING) {
397 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaReceipts.keyAt(i));
398 }
399 String id = mStanzaReceipts.valueAt(i);
400 if (acknowledgedListener != null) {
401 acknowledgedListener.onMessageAcknowledged(account, id);
402 }
403 mStanzaReceipts.removeAt(i);
404 i--;
405 }
406 }
407 }
408
409 private void sendInitialPing() {
410 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
411 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
412 iq.setFrom(account.getJid());
413 iq.addChild("ping", "urn:xmpp:ping");
414 this.sendIqPacket(iq, new OnIqPacketReceived() {
415 @Override
416 public void onIqPacketReceived(final Account account, final IqPacket packet) {
417 if (packet.getType() == IqPacket.TYPE.RESULT) {
418 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
419 changeStatus(Account.State.ONLINE);
420 } else {
421 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": initial ping failed");
422 }
423 }
424 });
425 }
426
427 private Element processPacket(final Tag currentTag, final int packetType)
428 throws XmlPullParserException, IOException {
429 Element element;
430 switch (packetType) {
431 case PACKET_IQ:
432 element = new IqPacket();
433 break;
434 case PACKET_MESSAGE:
435 element = new MessagePacket();
436 break;
437 case PACKET_PRESENCE:
438 element = new PresencePacket();
439 break;
440 default:
441 return null;
442 }
443 element.setAttributes(currentTag.getAttributes());
444 Tag nextTag = tagReader.readTag();
445 if (nextTag == null) {
446 throw new IOException("interrupted mid tag");
447 }
448 while (!nextTag.isEnd(element.getName())) {
449 if (!nextTag.isNo()) {
450 final Element child = tagReader.readElement(nextTag);
451 final String type = currentTag.getAttribute("type");
452 if (packetType == PACKET_IQ
453 && "jingle".equals(child.getName())
454 && ("set".equalsIgnoreCase(type) || "get"
455 .equalsIgnoreCase(type))) {
456 element = new JinglePacket();
457 element.setAttributes(currentTag.getAttributes());
458 }
459 element.addChild(child);
460 }
461 nextTag = tagReader.readTag();
462 if (nextTag == null) {
463 throw new IOException("interrupted mid tag");
464 }
465 }
466 if (stanzasReceived == Integer.MAX_VALUE) {
467 resetStreamId();
468 throw new IOException("time to restart the session. cant handle >2 billion pcks");
469 }
470 ++stanzasReceived;
471 lastPacketReceived = SystemClock.elapsedRealtime();
472 return element;
473 }
474
475 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
476 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
477
478 if (packet.getId() == null) {
479 return; // an iq packet without id is definitely invalid
480 }
481
482 if (packet instanceof JinglePacket) {
483 if (this.jingleListener != null) {
484 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
485 }
486 } else {
487 synchronized (this.packetCallbacks) {
488 if (packetCallbacks.containsKey(packet.getId())) {
489 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
490 // Packets to the server should have responses from the server
491 if (packetCallbackDuple.first.toServer(account)) {
492 if (packet.fromServer(account)) {
493 packetCallbackDuple.second.onIqPacketReceived(account, packet);
494 packetCallbacks.remove(packet.getId());
495 } else {
496 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
497 }
498 } else {
499 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
500 packetCallbackDuple.second.onIqPacketReceived(account, packet);
501 packetCallbacks.remove(packet.getId());
502 } else {
503 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
504 }
505 }
506 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
507 this.unregisteredIqListener.onIqPacketReceived(account, packet);
508 }
509 }
510 }
511 }
512
513 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
514 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
515 this.messageListener.onMessagePacketReceived(account, packet);
516 }
517
518 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
519 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
520 this.presenceListener.onPresencePacketReceived(account, packet);
521 }
522
523 private void sendStartTLS() throws IOException {
524 final Tag startTLS = Tag.empty("starttls");
525 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
526 tagWriter.writeTag(startTLS);
527 }
528
529 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
530 tagReader.readTag();
531 try {
532 final SSLContext sc = SSLContext.getInstance("TLS");
533 sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG());
534 final SSLSocketFactory factory = sc.getSocketFactory();
535 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
536 final InetAddress address = socket == null ? null : socket.getInetAddress();
537
538 if (factory == null || address == null || verifier == null) {
539 throw new IOException("could not setup ssl");
540 }
541
542 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
543
544 if (sslSocket == null) {
545 throw new IOException("could not initialize ssl socket");
546 }
547
548 final String[] supportProtocols;
549 final Collection<String> supportedProtocols = new LinkedList<>(
550 Arrays.asList(sslSocket.getSupportedProtocols()));
551 supportedProtocols.remove("SSLv3");
552 supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
553
554 sslSocket.setEnabledProtocols(supportProtocols);
555
556 final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
557 sslSocket.getSupportedCipherSuites());
558 //Log.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites));
559 if (cipherSuites.length > 0) {
560 sslSocket.setEnabledCipherSuites(cipherSuites);
561 }
562
563 if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
564 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
565 throw new SecurityException();
566 }
567 tagReader.setInputStream(sslSocket.getInputStream());
568 tagWriter.setOutputStream(sslSocket.getOutputStream());
569 sendStartStream();
570 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
571 features.encryptionEnabled = true;
572 processStream(tagReader.readTag());
573 sslSocket.close();
574 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
575 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
576 throw new SecurityException();
577 }
578 }
579
580 private void processStreamFeatures(final Tag currentTag)
581 throws XmlPullParserException, IOException {
582 this.streamFeatures = tagReader.readElement(currentTag);
583 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
584 sendStartTLS();
585 } else if (this.streamFeatures.hasChild("register")
586 && account.isOptionSet(Account.OPTION_REGISTER)
587 && features.encryptionEnabled) {
588 sendRegistryRequest();
589 } else if (!this.streamFeatures.hasChild("register")
590 && account.isOptionSet(Account.OPTION_REGISTER)) {
591 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
592 disconnect(true);
593 } else if (this.streamFeatures.hasChild("mechanisms")
594 && shouldAuthenticate && features.encryptionEnabled) {
595 final List<String> mechanisms = extractMechanisms(streamFeatures
596 .findChild("mechanisms"));
597 final Element auth = new Element("auth");
598 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
599 if (mechanisms.contains("SCRAM-SHA-1")) {
600 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
601 } else if (mechanisms.contains("PLAIN")) {
602 saslMechanism = new Plain(tagWriter, account);
603 } else if (mechanisms.contains("DIGEST-MD5")) {
604 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
605 }
606 if (saslMechanism != null) {
607 final JSONObject keys = account.getKeys();
608 try {
609 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
610 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) {
611 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
612 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
613 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
614 "). Possible downgrade attack?");
615 throw new SecurityException();
616 }
617 } catch (final JSONException e) {
618 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
619 }
620 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
621 auth.setAttribute("mechanism", saslMechanism.getMechanism());
622 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
623 auth.setContent(saslMechanism.getClientFirstMessage());
624 }
625 tagWriter.writeElement(auth);
626 } else {
627 throw new IncompatibleServerException();
628 }
629 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
630 + smVersion)
631 && streamId != null) {
632 if (Config.EXTENDED_SM_LOGGING) {
633 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
634 }
635 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
636 this.tagWriter.writeStanzaAsync(resume);
637 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
638 sendBindRequest();
639 } else {
640 disconnect(true);
641 changeStatus(Account.State.INCOMPATIBLE_SERVER);
642 }
643 }
644
645 private List<String> extractMechanisms(final Element stream) {
646 final ArrayList<String> mechanisms = new ArrayList<>(stream
647 .getChildren().size());
648 for (final Element child : stream.getChildren()) {
649 mechanisms.add(child.getContent());
650 }
651 return mechanisms;
652 }
653
654 private void sendRegistryRequest() {
655 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
656 register.query("jabber:iq:register");
657 register.setTo(account.getServer());
658 sendIqPacket(register, new OnIqPacketReceived() {
659
660 @Override
661 public void onIqPacketReceived(final Account account, final IqPacket packet) {
662 if (packet.getType() == IqPacket.TYPE.RESULT
663 && packet.query().hasChild("username")
664 && (packet.query().hasChild("password"))) {
665 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
666 final Element username = new Element("username").setContent(account.getUsername());
667 final Element password = new Element("password").setContent(account.getPassword());
668 register.query("jabber:iq:register").addChild(username);
669 register.query().addChild(password);
670 sendIqPacket(register, new OnIqPacketReceived() {
671
672 @Override
673 public void onIqPacketReceived(final Account account, final IqPacket packet) {
674 if (packet.getType() == IqPacket.TYPE.RESULT) {
675 account.setOption(Account.OPTION_REGISTER,
676 false);
677 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
678 } else if (packet.hasChild("error")
679 && (packet.findChild("error")
680 .hasChild("conflict"))) {
681 changeStatus(Account.State.REGISTRATION_CONFLICT);
682 } else {
683 changeStatus(Account.State.REGISTRATION_FAILED);
684 Log.d(Config.LOGTAG, packet.toString());
685 }
686 disconnect(true);
687 }
688 });
689 } else {
690 final Element instructions = packet.query().findChild("instructions");
691 changeStatus(Account.State.REGISTRATION_FAILED);
692 disconnect(true);
693 Log.d(Config.LOGTAG, account.getJid().toBareJid()
694 + ": could not register. instructions are"
695 + (instructions != null ? instructions.getContent() : ""));
696 }
697 }
698 });
699 }
700
701 private void sendBindRequest() {
702 while(!mXmppConnectionService.areMessagesInitialized()) {
703 try {
704 Thread.sleep(500);
705 } catch (final InterruptedException ignored) {
706 }
707 }
708 clearIqCallbacks();
709 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
710 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
711 .addChild("resource").setContent(account.getResource());
712 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
713 @Override
714 public void onIqPacketReceived(final Account account, final IqPacket packet) {
715 final Element bind = packet.findChild("bind");
716 if (bind != null) {
717 final Element jid = bind.findChild("jid");
718 if (jid != null && jid.getContent() != null) {
719 try {
720 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
721 } catch (final InvalidJidException e) {
722 // TODO: Handle the case where an external JID is technically invalid?
723 }
724 if (streamFeatures.hasChild("session")) {
725 sendStartSession();
726 } else {
727 sendPostBindInitialization();
728 }
729 } else {
730 Log.d(Config.LOGTAG,account.getJid()+": disconnecting because of bind failure");
731 disconnect(true);
732 }
733 } else {
734 Log.d(Config.LOGTAG,account.getJid()+": disconnecting because of bind failure");
735 disconnect(true);
736 }
737 }
738 });
739 }
740
741 private void clearIqCallbacks() {
742 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.ERROR);
743 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
744 synchronized (this.packetCallbacks) {
745 if (this.packetCallbacks.size() == 0) {
746 return;
747 }
748 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
749 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
750 while (iterator.hasNext()) {
751 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
752 callbacks.add(entry.second);
753 iterator.remove();
754 }
755 }
756 for(OnIqPacketReceived callback : callbacks) {
757 callback.onIqPacketReceived(account,failurePacket);
758 }
759 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": done clearing iq callbacks. "+this.packetCallbacks.size()+" left");
760 }
761
762 private void sendStartSession() {
763 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
764 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
765 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
766 @Override
767 public void onIqPacketReceived(Account account, IqPacket packet) {
768 if (packet.getType() == IqPacket.TYPE.RESULT) {
769 sendPostBindInitialization();
770 } else {
771 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
772 disconnect(true);
773 }
774 }
775 });
776 }
777
778 private void sendPostBindInitialization() {
779 smVersion = 0;
780 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
781 smVersion = 3;
782 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
783 smVersion = 2;
784 }
785 if (smVersion != 0) {
786 final EnablePacket enable = new EnablePacket(smVersion);
787 tagWriter.writeStanzaAsync(enable);
788 stanzasSent = 0;
789 mStanzaReceipts.clear();
790 }
791 features.carbonsEnabled = false;
792 features.blockListRequested = false;
793 disco.clear();
794 sendServiceDiscoveryInfo(account.getServer());
795 sendServiceDiscoveryInfo(account.getJid().toBareJid());
796 sendServiceDiscoveryItems(account.getServer());
797 if (bindListener != null) {
798 bindListener.onBind(account);
799 }
800 sendInitialPing();
801 }
802
803 private void sendServiceDiscoveryInfo(final Jid jid) {
804 if (disco.containsKey(jid)) {
805 if (account.getServer().equals(jid)) {
806 enableAdvancedStreamFeatures();
807 }
808 } else {
809 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
810 iq.setTo(jid);
811 iq.query("http://jabber.org/protocol/disco#info");
812 this.sendIqPacket(iq, new OnIqPacketReceived() {
813
814 @Override
815 public void onIqPacketReceived(final Account account, final IqPacket packet) {
816 if (packet.getType() == IqPacket.TYPE.RESULT) {
817 final List<Element> elements = packet.query().getChildren();
818 final Info info = new Info();
819 for (final Element element : elements) {
820 if (element.getName().equals("identity")) {
821 String type = element.getAttribute("type");
822 String category = element.getAttribute("category");
823 if (type != null && category != null) {
824 info.identities.add(new Pair<>(category, type));
825 }
826 } else if (element.getName().equals("feature")) {
827 info.features.add(element.getAttribute("var"));
828 }
829 }
830 disco.put(jid, info);
831 if (account.getServer().equals(jid)) {
832 enableAdvancedStreamFeatures();
833 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
834 listener.onAdvancedStreamFeaturesAvailable(account);
835 }
836 }
837 } else {
838 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could not query disco info for "+jid.toString());
839 }
840 }
841 });
842 }
843 }
844
845 private void enableAdvancedStreamFeatures() {
846 if (getFeatures().carbons() && !features.carbonsEnabled) {
847 sendEnableCarbons();
848 }
849 if (getFeatures().blocking() && !features.blockListRequested) {
850 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": Requesting block list");
851 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
852 }
853 }
854
855 private void sendServiceDiscoveryItems(final Jid server) {
856 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
857 iq.setTo(server.toDomainJid());
858 iq.query("http://jabber.org/protocol/disco#items");
859 this.sendIqPacket(iq, new OnIqPacketReceived() {
860
861 @Override
862 public void onIqPacketReceived(final Account account, final IqPacket packet) {
863 if (packet.getType() == IqPacket.TYPE.RESULT) {
864 final List<Element> elements = packet.query().getChildren();
865 for (final Element element : elements) {
866 if (element.getName().equals("item")) {
867 final Jid jid = element.getAttributeAsJid("jid");
868 if (jid != null && !jid.equals(account.getServer())) {
869 sendServiceDiscoveryInfo(jid);
870 }
871 }
872 }
873 } else {
874 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could not query disco items of "+server);
875 }
876 }
877 });
878 }
879
880 private void sendEnableCarbons() {
881 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
882 iq.addChild("enable", "urn:xmpp:carbons:2");
883 this.sendIqPacket(iq, new OnIqPacketReceived() {
884
885 @Override
886 public void onIqPacketReceived(final Account account, final IqPacket packet) {
887 if (!packet.hasChild("error")) {
888 Log.d(Config.LOGTAG, account.getJid().toBareJid()
889 + ": successfully enabled carbons");
890 features.carbonsEnabled = true;
891 } else {
892 Log.d(Config.LOGTAG, account.getJid().toBareJid()
893 + ": error enableing carbons " + packet.toString());
894 }
895 }
896 });
897 }
898
899 private void processStreamError(final Tag currentTag)
900 throws XmlPullParserException, IOException {
901 final Element streamError = tagReader.readElement(currentTag);
902 if (streamError != null && streamError.hasChild("conflict")) {
903 final String resource = account.getResource().split("\\.")[0];
904 account.setResource(resource + "." + nextRandomId());
905 Log.d(Config.LOGTAG,
906 account.getJid().toBareJid() + ": switching resource due to conflict ("
907 + account.getResource() + ")");
908 } else if (streamError != null) {
909 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
910 }
911 }
912
913 private void sendStartStream() throws IOException {
914 final Tag stream = Tag.start("stream:stream");
915 stream.setAttribute("from", account.getJid().toBareJid().toString());
916 stream.setAttribute("to", account.getServer().toString());
917 stream.setAttribute("version", "1.0");
918 stream.setAttribute("xml:lang", "en");
919 stream.setAttribute("xmlns", "jabber:client");
920 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
921 tagWriter.writeTag(stream);
922 }
923
924 private String nextRandomId() {
925 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
926 }
927
928 public void sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
929 packet.setFrom(account.getJid());
930 this.sendUnmodifiedIqPacket(packet, callback);
931
932 }
933
934 private synchronized void sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
935 if (packet.getId() == null) {
936 final String id = nextRandomId();
937 packet.setAttribute("id", id);
938 }
939 if (callback != null) {
940 synchronized (this.packetCallbacks) {
941 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
942 }
943 }
944 this.sendPacket(packet);
945 }
946
947 public void sendMessagePacket(final MessagePacket packet) {
948 this.sendPacket(packet);
949 }
950
951 public void sendPresencePacket(final PresencePacket packet) {
952 this.sendPacket(packet);
953 }
954
955 private synchronized void sendPacket(final AbstractStanza packet) {
956 if (stanzasSent == Integer.MAX_VALUE) {
957 resetStreamId();
958 disconnect(true);
959 return;
960 }
961 final String name = packet.getName();
962 if (name.equals("iq") || name.equals("message") || name.equals("presence")) {
963 ++stanzasSent;
964 }
965 tagWriter.writeStanzaAsync(packet);
966 if ((packet instanceof MessagePacket || packet instanceof IqPacket) && packet.getId() != null && this.streamId != null) {
967 if (Config.EXTENDED_SM_LOGGING) {
968 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for stanza #" + stanzasSent);
969 }
970 this.mStanzaReceipts.put(stanzasSent, packet.getId());
971 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
972 }
973 }
974
975 public void sendPing() {
976 if (streamFeatures.hasChild("sm")) {
977 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
978 } else {
979 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
980 iq.setFrom(account.getJid());
981 iq.addChild("ping", "urn:xmpp:ping");
982 this.sendIqPacket(iq, null);
983 }
984 this.lastPingSent = SystemClock.elapsedRealtime();
985 }
986
987 public void setOnMessagePacketReceivedListener(
988 final OnMessagePacketReceived listener) {
989 this.messageListener = listener;
990 }
991
992 public void setOnUnregisteredIqPacketReceivedListener(
993 final OnIqPacketReceived listener) {
994 this.unregisteredIqListener = listener;
995 }
996
997 public void setOnPresencePacketReceivedListener(
998 final OnPresencePacketReceived listener) {
999 this.presenceListener = listener;
1000 }
1001
1002 public void setOnJinglePacketReceivedListener(
1003 final OnJinglePacketReceived listener) {
1004 this.jingleListener = listener;
1005 }
1006
1007 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1008 this.statusListener = listener;
1009 }
1010
1011 public void setOnBindListener(final OnBindListener listener) {
1012 this.bindListener = listener;
1013 }
1014
1015 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1016 this.acknowledgedListener = listener;
1017 }
1018
1019 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1020 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1021 this.advancedStreamFeaturesLoadedListeners.add(listener);
1022 }
1023 }
1024
1025 public void disconnect(final boolean force) {
1026 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
1027 try {
1028 if (force) {
1029 socket.close();
1030 return;
1031 }
1032 new Thread(new Runnable() {
1033
1034 @Override
1035 public void run() {
1036 if (tagWriter.isActive()) {
1037 tagWriter.finish();
1038 try {
1039 while (!tagWriter.finished() && socket.isConnected()) {
1040 Log.d(Config.LOGTAG, "not yet finished");
1041 Thread.sleep(100);
1042 }
1043 tagWriter.writeTag(Tag.end("stream:stream"));
1044 socket.close();
1045 } catch (final IOException e) {
1046 Log.d(Config.LOGTAG,
1047 "io exception during disconnect");
1048 } catch (final InterruptedException e) {
1049 Log.d(Config.LOGTAG, "interrupted");
1050 }
1051 }
1052 }
1053 }).start();
1054 } catch (final IOException e) {
1055 Log.d(Config.LOGTAG, "io exception during disconnect");
1056 }
1057 }
1058
1059 public void resetStreamId() {
1060 this.streamId = null;
1061 }
1062
1063 public List<Jid> findDiscoItemsByFeature(final String feature) {
1064 final List<Jid> items = new ArrayList<>();
1065 for (final Entry<Jid, Info> cursor : disco.entrySet()) {
1066 if (cursor.getValue().features.contains(feature)) {
1067 items.add(cursor.getKey());
1068 }
1069 }
1070 return items;
1071 }
1072
1073 public Jid findDiscoItemByFeature(final String feature) {
1074 final List<Jid> items = findDiscoItemsByFeature(feature);
1075 if (items.size() >= 1) {
1076 return items.get(0);
1077 }
1078 return null;
1079 }
1080
1081 public void r() {
1082 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1083 }
1084
1085 public String getMucServer() {
1086 for (final Entry<Jid, Info> cursor : disco.entrySet()) {
1087 final Info value = cursor.getValue();
1088 if (value.features.contains("http://jabber.org/protocol/muc")
1089 && !value.features.contains("jabber:iq:gateway")
1090 && !value.identities.contains(new Pair<>("conference","irc"))) {
1091 return cursor.getKey().toString();
1092 }
1093 }
1094 return null;
1095 }
1096
1097 public int getTimeToNextAttempt() {
1098 final int interval = (int) (25 * Math.pow(1.5, attempt));
1099 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1100 return interval - secondsSinceLast;
1101 }
1102
1103 public int getAttempt() {
1104 return this.attempt;
1105 }
1106
1107 public Features getFeatures() {
1108 return this.features;
1109 }
1110
1111 public long getLastSessionEstablished() {
1112 final long diff;
1113 if (this.lastSessionStarted == 0) {
1114 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1115 } else {
1116 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1117 }
1118 return System.currentTimeMillis() - diff;
1119 }
1120
1121 public long getLastConnect() {
1122 return this.lastConnect;
1123 }
1124
1125 public long getLastPingSent() {
1126 return this.lastPingSent;
1127 }
1128
1129 public long getLastPacketReceived() {
1130 return this.lastPacketReceived;
1131 }
1132
1133 public void sendActive() {
1134 this.sendPacket(new ActivePacket());
1135 }
1136
1137 public void sendInactive() {
1138 this.sendPacket(new InactivePacket());
1139 }
1140
1141 public void resetAttemptCount() {
1142 this.attempt = 0;
1143 this.lastConnect = 0;
1144 }
1145
1146 private class Info {
1147 public final ArrayList<String> features = new ArrayList<>();
1148 public final ArrayList<Pair<String,String>> identities = new ArrayList<>();
1149 }
1150
1151 private class UnauthorizedException extends IOException {
1152
1153 }
1154
1155 private class SecurityException extends IOException {
1156
1157 }
1158
1159 private class IncompatibleServerException extends IOException {
1160
1161 }
1162
1163 public class Features {
1164 XmppConnection connection;
1165 private boolean carbonsEnabled = false;
1166 private boolean encryptionEnabled = false;
1167 private boolean blockListRequested = false;
1168
1169 public Features(final XmppConnection connection) {
1170 this.connection = connection;
1171 }
1172
1173 private boolean hasDiscoFeature(final Jid server, final String feature) {
1174 return connection.disco.containsKey(server) &&
1175 connection.disco.get(server).features.contains(feature);
1176 }
1177
1178 public boolean carbons() {
1179 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1180 }
1181
1182 public boolean blocking() {
1183 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1184 }
1185
1186 public boolean register() {
1187 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1188 }
1189
1190 public boolean sm() {
1191 return streamId != null
1192 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1193 }
1194
1195 public boolean csi() {
1196 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1197 }
1198
1199 public boolean pep() {
1200 final Pair<String,String> needle = new Pair<>("pubsub","pep");
1201 Info info = disco.get(account.getServer());
1202 if (info != null && info.identities.contains(needle)) {
1203 return true;
1204 } else {
1205 info = disco.get(account.getJid().toBareJid());
1206 return info != null && info.identities.contains(needle);
1207 }
1208 }
1209
1210 public boolean mam() {
1211 if (hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")) {
1212 return true;
1213 } else {
1214 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1215 }
1216 }
1217
1218 public boolean advancedStreamFeaturesLoaded() {
1219 return disco.containsKey(account.getServer());
1220 }
1221
1222 public boolean rosterVersioning() {
1223 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1224 }
1225
1226 public void setBlockListRequested(boolean value) {
1227 this.blockListRequested = value;
1228 }
1229
1230 public boolean httpUpload() {
1231 return findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD).size() > 0;
1232 }
1233 }
1234
1235 private IqGenerator getIqGenerator() {
1236 return mXmppConnectionService.getIqGenerator();
1237 }
1238}