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 private OnIqPacketReceived createPacketReceiveHandler() {
180 return new OnIqPacketReceived() {
181 @Override
182 public void onIqPacketReceived(Account account, IqPacket packet) {
183 if (packet.getType() == IqPacket.TYPE.RESULT) {
184 account.setOption(Account.OPTION_REGISTER,
185 false);
186 forceCloseSocket();
187 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
188 } else if (packet.hasChild("error")
189 && (packet.findChild("error")
190 .hasChild("conflict"))) {
191 forceCloseSocket();
192 changeStatus(Account.State.REGISTRATION_CONFLICT);
193 } else {
194 forceCloseSocket();
195 changeStatus(Account.State.REGISTRATION_FAILED);
196 Log.d(Config.LOGTAG, packet.toString());
197 }
198 }
199 };
200 }
201
202 public XmppConnection(final Account account, final XmppConnectionService service) {
203 this.account = account;
204 this.wakeLock = service.getPowerManager().newWakeLock(
205 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
206 tagWriter = new TagWriter();
207 mXmppConnectionService = service;
208 }
209
210 protected void changeStatus(final Account.State nextStatus) {
211 if (account.getStatus() != nextStatus) {
212 if ((nextStatus == Account.State.OFFLINE)
213 && (account.getStatus() != Account.State.CONNECTING)
214 && (account.getStatus() != Account.State.ONLINE)
215 && (account.getStatus() != Account.State.DISABLED)) {
216 return;
217 }
218 if (nextStatus == Account.State.ONLINE) {
219 this.attempt = 0;
220 }
221 account.setStatus(nextStatus);
222 if (statusListener != null) {
223 statusListener.onStatusChanged(account);
224 }
225 }
226 }
227
228 public void prepareNewConnection() {
229 this.lastConnect = SystemClock.elapsedRealtime();
230 this.lastPingSent = SystemClock.elapsedRealtime();
231 this.lastDiscoStarted = Long.MAX_VALUE;
232 this.changeStatus(Account.State.CONNECTING);
233 }
234
235 protected void connect() {
236 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
237 features.encryptionEnabled = false;
238 this.attempt++;
239 switch (account.getJid().getDomainpart()) {
240 case "chat.facebook.com":
241 mServerIdentity = Identity.FACEBOOK;
242 break;
243 case "nimbuzz.com":
244 mServerIdentity = Identity.NIMBUZZ;
245 break;
246 default:
247 mServerIdentity = Identity.UNKNOWN;
248 break;
249 }
250 try {
251 shouldAuthenticate = needsBinding = !account.isOptionSet(Account.OPTION_REGISTER);
252 tagReader = new XmlReader(wakeLock);
253 tagWriter = new TagWriter();
254 this.changeStatus(Account.State.CONNECTING);
255 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
256 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
257 if (useTor) {
258 String destination;
259 if (account.getHostname() == null || account.getHostname().isEmpty()) {
260 destination = account.getServer().toString();
261 } else {
262 destination = account.getHostname();
263 }
264 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": connect to " + destination + " via TOR");
265 socket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
266 startXmpp();
267 } else if (extended && account.getHostname() != null && !account.getHostname().isEmpty()) {
268 socket = new Socket();
269 try {
270 socket.connect(new InetSocketAddress(account.getHostname(), account.getPort()), Config.SOCKET_TIMEOUT * 1000);
271 } catch (IOException e) {
272 throw new UnknownHostException();
273 }
274 startXmpp();
275 } else if (DNSHelper.isIp(account.getServer().toString())) {
276 socket = new Socket();
277 try {
278 socket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
279 } catch (IOException e) {
280 throw new UnknownHostException();
281 }
282 startXmpp();
283 } else {
284 final Bundle result = DNSHelper.getSRVRecord(account.getServer(), mXmppConnectionService);
285 final ArrayList<Parcelable>values = result.getParcelableArrayList("values");
286 for(Iterator<Parcelable> iterator = values.iterator(); iterator.hasNext();) {
287 final Bundle namePort = (Bundle) iterator.next();
288 try {
289 String srvRecordServer;
290 try {
291 srvRecordServer = IDN.toASCII(namePort.getString("name"));
292 } catch (final IllegalArgumentException e) {
293 // TODO: Handle me?`
294 srvRecordServer = "";
295 }
296 final int srvRecordPort = namePort.getInt("port");
297 final String srvIpServer = namePort.getString("ip");
298 // if tls is true, encryption is implied and must not be started
299 features.encryptionEnabled = namePort.getBoolean("tls");
300 final InetSocketAddress addr;
301 if (srvIpServer != null) {
302 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
303 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
304 + ": using values from dns " + srvRecordServer
305 + "[" + srvIpServer + "]:" + srvRecordPort + " tls: " + features.encryptionEnabled);
306 } else {
307 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
308 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
309 + ": using values from dns "
310 + srvRecordServer + ":" + srvRecordPort + " tls: " + features.encryptionEnabled);
311 }
312
313 if (!features.encryptionEnabled) {
314 socket = new Socket();
315 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
316 } else {
317 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
318 socket = tlsFactoryVerifier.factory.createSocket();
319
320 if (socket == null) {
321 throw new IOException("could not initialize ssl socket");
322 }
323
324 SSLSocketHelper.setSecurity((SSLSocket) socket);
325 SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) socket, account.getServer().getDomainpart());
326 SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) socket, "xmpp-client");
327
328 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
329
330 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) socket).getSession())) {
331 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
332 throw new SecurityException();
333 }
334 }
335
336 if (startXmpp())
337 break; // successfully connected to server that speaks xmpp
338 } catch(final SecurityException e) {
339 throw e;
340 } catch (final Throwable e) {
341 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() +"("+e.getClass().getName()+")");
342 if (!iterator.hasNext()) {
343 throw new UnknownHostException();
344 }
345 }
346 }
347 }
348 processStream();
349 } catch (final IncompatibleServerException e) {
350 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
351 } catch (final SecurityException e) {
352 this.changeStatus(Account.State.SECURITY_ERROR);
353 } catch (final UnauthorizedException e) {
354 this.changeStatus(Account.State.UNAUTHORIZED);
355 } catch (final UnknownHostException | ConnectException e) {
356 this.changeStatus(Account.State.SERVER_NOT_FOUND);
357 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
358 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
359 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
360 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
361 this.changeStatus(Account.State.OFFLINE);
362 this.attempt--; //don't count attempt when reconnecting instantly anyway
363 } finally {
364 forceCloseSocket();
365 if (wakeLock.isHeld()) {
366 try {
367 wakeLock.release();
368 } catch (final RuntimeException ignored) {
369 }
370 }
371 }
372 }
373
374 /**
375 * Starts xmpp protocol, call after connecting to socket
376 * @return true if server returns with valid xmpp, false otherwise
377 * @throws IOException Unknown tag on connect
378 * @throws XmlPullParserException Bad Xml
379 * @throws NoSuchAlgorithmException Other error
380 */
381 private boolean startXmpp() throws IOException, XmlPullParserException, NoSuchAlgorithmException {
382 tagWriter.setOutputStream(socket.getOutputStream());
383 tagReader.setInputStream(socket.getInputStream());
384 tagWriter.beginDocument();
385 sendStartStream();
386 Tag nextTag;
387 while ((nextTag = tagReader.readTag()) != null) {
388 if (nextTag.isStart("stream")) {
389 return true;
390 } else {
391 throw new IOException("unknown tag on connect");
392 }
393 }
394 if (socket.isConnected()) {
395 socket.close();
396 }
397 return false;
398 }
399
400 private static class TlsFactoryVerifier {
401 private final SSLSocketFactory factory;
402 private final HostnameVerifier verifier;
403
404 public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
405 this.factory = factory;
406 this.verifier = verifier;
407 if (factory == null || verifier == null) {
408 throw new IOException("could not setup ssl");
409 }
410 }
411 }
412
413 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
414 final SSLContext sc = SSLSocketHelper.getSSLContext();
415 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
416 KeyManager[] keyManager;
417 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
418 keyManager = new KeyManager[]{mKeyManager};
419 } else {
420 keyManager = null;
421 }
422 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()}, mXmppConnectionService.getRNG());
423 final SSLSocketFactory factory = sc.getSocketFactory();
424 final HostnameVerifier verifier;
425 if (mInteractive) {
426 verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
427 } else {
428 verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
429 }
430
431 return new TlsFactoryVerifier(factory, verifier);
432 }
433
434 @Override
435 public void run() {
436 forceCloseSocket();
437 connect();
438 }
439
440 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
441 Tag nextTag = tagReader.readTag();
442 while (nextTag != null && !nextTag.isEnd("stream")) {
443 if (nextTag.isStart("error")) {
444 processStreamError(nextTag);
445 } else if (nextTag.isStart("features")) {
446 processStreamFeatures(nextTag);
447 } else if (nextTag.isStart("proceed")) {
448 switchOverToTls(nextTag);
449 } else if (nextTag.isStart("success")) {
450 final String challenge = tagReader.readElement(nextTag).getContent();
451 try {
452 saslMechanism.getResponse(challenge);
453 } catch (final SaslMechanism.AuthenticationException e) {
454 disconnect(true);
455 Log.e(Config.LOGTAG, String.valueOf(e));
456 }
457 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
458 account.setKey(Account.PINNED_MECHANISM_KEY,
459 String.valueOf(saslMechanism.getPriority()));
460 tagReader.reset();
461 sendStartStream();
462 final Tag tag = tagReader.readTag();
463 if (tag != null && tag.isStart("stream")) {
464 processStream();
465 } else {
466 throw new IOException("server didn't restart stream after successful auth");
467 }
468 break;
469 } else if (nextTag.isStart("failure")) {
470 throw new UnauthorizedException();
471 } else if (nextTag.isStart("challenge")) {
472 final String challenge = tagReader.readElement(nextTag).getContent();
473 final Element response = new Element("response");
474 response.setAttribute("xmlns",
475 "urn:ietf:params:xml:ns:xmpp-sasl");
476 try {
477 response.setContent(saslMechanism.getResponse(challenge));
478 } catch (final SaslMechanism.AuthenticationException e) {
479 // TODO: Send auth abort tag.
480 Log.e(Config.LOGTAG, e.toString());
481 }
482 tagWriter.writeElement(response);
483 } else if (nextTag.isStart("enabled")) {
484 final Element enabled = tagReader.readElement(nextTag);
485 if ("true".equals(enabled.getAttribute("resume"))) {
486 this.streamId = enabled.getAttribute("id");
487 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
488 + ": stream managment(" + smVersion
489 + ") enabled (resumable)");
490 } else {
491 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
492 + ": stream management(" + smVersion + ") enabled");
493 }
494 this.stanzasReceived = 0;
495 final RequestPacket r = new RequestPacket(smVersion);
496 tagWriter.writeStanzaAsync(r);
497 } else if (nextTag.isStart("resumed")) {
498 lastPacketReceived = SystemClock.elapsedRealtime();
499 final Element resumed = tagReader.readElement(nextTag);
500 final String h = resumed.getAttribute("h");
501 try {
502 final int serverCount = Integer.parseInt(h);
503 if (serverCount != stanzasSent) {
504 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
505 + ": session resumed with lost packages");
506 stanzasSent = serverCount;
507 } else {
508 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
509 }
510 acknowledgeStanzaUpTo(serverCount);
511 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
512 for(int i = 0; i < this.mStanzaQueue.size(); ++i) {
513 failedStanzas.add(mStanzaQueue.valueAt(i));
514 }
515 mStanzaQueue.clear();
516 Log.d(Config.LOGTAG,"resending "+failedStanzas.size()+" stanzas");
517 for(AbstractAcknowledgeableStanza packet : failedStanzas) {
518 if (packet instanceof MessagePacket) {
519 MessagePacket message = (MessagePacket) packet;
520 mXmppConnectionService.markMessage(account,
521 message.getTo().toBareJid(),
522 message.getId(),
523 Message.STATUS_UNSEND);
524 }
525 sendPacket(packet);
526 }
527 } catch (final NumberFormatException ignored) {
528 }
529 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
530 changeStatus(Account.State.ONLINE);
531 } else if (nextTag.isStart("r")) {
532 tagReader.readElement(nextTag);
533 if (Config.EXTENDED_SM_LOGGING) {
534 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
535 }
536 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
537 tagWriter.writeStanzaAsync(ack);
538 } else if (nextTag.isStart("a")) {
539 final Element ack = tagReader.readElement(nextTag);
540 lastPacketReceived = SystemClock.elapsedRealtime();
541 try {
542 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
543 acknowledgeStanzaUpTo(serverSequence);
544 } catch (NumberFormatException e) {
545 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
546 }
547 } else if (nextTag.isStart("failed")) {
548 tagReader.readElement(nextTag);
549 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
550 resetStreamId();
551 if (account.getStatus() != Account.State.ONLINE) {
552 sendBindRequest();
553 }
554 } else if (nextTag.isStart("iq")) {
555 processIq(nextTag);
556 } else if (nextTag.isStart("message")) {
557 processMessage(nextTag);
558 } else if (nextTag.isStart("presence")) {
559 processPresence(nextTag);
560 }
561 nextTag = tagReader.readTag();
562 }
563 throw new IOException("reached end of stream. last tag was "+nextTag);
564 }
565
566 private void acknowledgeStanzaUpTo(int serverCount) {
567 for (int i = 0; i < mStanzaQueue.size(); ++i) {
568 if (serverCount >= mStanzaQueue.keyAt(i)) {
569 if (Config.EXTENDED_SM_LOGGING) {
570 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
571 }
572 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
573 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
574 MessagePacket packet = (MessagePacket) stanza;
575 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
576 }
577 mStanzaQueue.removeAt(i);
578 i--;
579 }
580 }
581 }
582
583 private Element processPacket(final Tag currentTag, final int packetType)
584 throws XmlPullParserException, IOException {
585 Element element;
586 switch (packetType) {
587 case PACKET_IQ:
588 element = new IqPacket();
589 break;
590 case PACKET_MESSAGE:
591 element = new MessagePacket();
592 break;
593 case PACKET_PRESENCE:
594 element = new PresencePacket();
595 break;
596 default:
597 return null;
598 }
599 element.setAttributes(currentTag.getAttributes());
600 Tag nextTag = tagReader.readTag();
601 if (nextTag == null) {
602 throw new IOException("interrupted mid tag");
603 }
604 while (!nextTag.isEnd(element.getName())) {
605 if (!nextTag.isNo()) {
606 final Element child = tagReader.readElement(nextTag);
607 final String type = currentTag.getAttribute("type");
608 if (packetType == PACKET_IQ
609 && "jingle".equals(child.getName())
610 && ("set".equalsIgnoreCase(type) || "get"
611 .equalsIgnoreCase(type))) {
612 element = new JinglePacket();
613 element.setAttributes(currentTag.getAttributes());
614 }
615 element.addChild(child);
616 }
617 nextTag = tagReader.readTag();
618 if (nextTag == null) {
619 throw new IOException("interrupted mid tag");
620 }
621 }
622 if (stanzasReceived == Integer.MAX_VALUE) {
623 resetStreamId();
624 throw new IOException("time to restart the session. cant handle >2 billion pcks");
625 }
626 ++stanzasReceived;
627 lastPacketReceived = SystemClock.elapsedRealtime();
628 return element;
629 }
630
631 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
632 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
633
634 if (packet.getId() == null) {
635 return; // an iq packet without id is definitely invalid
636 }
637
638 if (packet instanceof JinglePacket) {
639 if (this.jingleListener != null) {
640 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
641 }
642 } else {
643 OnIqPacketReceived callback = null;
644 synchronized (this.packetCallbacks) {
645 if (packetCallbacks.containsKey(packet.getId())) {
646 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
647 // Packets to the server should have responses from the server
648 if (packetCallbackDuple.first.toServer(account)) {
649 if (packet.fromServer(account) || mServerIdentity == Identity.FACEBOOK) {
650 callback = packetCallbackDuple.second;
651 packetCallbacks.remove(packet.getId());
652 } else {
653 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
654 }
655 } else {
656 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
657 callback = packetCallbackDuple.second;
658 packetCallbacks.remove(packet.getId());
659 } else {
660 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
661 }
662 }
663 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
664 callback = this.unregisteredIqListener;
665 }
666 }
667 if (callback != null) {
668 callback.onIqPacketReceived(account,packet);
669 }
670 }
671 }
672
673 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
674 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
675 this.messageListener.onMessagePacketReceived(account, packet);
676 }
677
678 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
679 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
680 this.presenceListener.onPresencePacketReceived(account, packet);
681 }
682
683 private void sendStartTLS() throws IOException {
684 final Tag startTLS = Tag.empty("starttls");
685 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
686 tagWriter.writeTag(startTLS);
687 }
688
689
690
691 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
692 tagReader.readTag();
693 try {
694 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
695 final InetAddress address = socket == null ? null : socket.getInetAddress();
696
697 if (address == null) {
698 throw new IOException("could not setup ssl");
699 }
700
701 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
702
703 if (sslSocket == null) {
704 throw new IOException("could not initialize ssl socket");
705 }
706
707 SSLSocketHelper.setSecurity(sslSocket);
708
709 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
710 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
711 throw new SecurityException();
712 }
713 tagReader.setInputStream(sslSocket.getInputStream());
714 tagWriter.setOutputStream(sslSocket.getOutputStream());
715 sendStartStream();
716 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
717 features.encryptionEnabled = true;
718 final Tag tag = tagReader.readTag();
719 if (tag != null && tag.isStart("stream")) {
720 processStream();
721 } else {
722 throw new IOException("server didn't restart stream after STARTTLS");
723 }
724 sslSocket.close();
725 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
726 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
727 throw new SecurityException();
728 }
729 }
730
731 private void processStreamFeatures(final Tag currentTag)
732 throws XmlPullParserException, IOException {
733 this.streamFeatures = tagReader.readElement(currentTag);
734 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
735 sendStartTLS();
736 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
737 if (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS) {
738 sendRegistryRequest();
739 } else {
740 throw new IncompatibleServerException();
741 }
742 } else if (!this.streamFeatures.hasChild("register")
743 && account.isOptionSet(Account.OPTION_REGISTER)) {
744 forceCloseSocket();
745 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
746 } else if (this.streamFeatures.hasChild("mechanisms")
747 && shouldAuthenticate
748 && (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS)) {
749 authenticate();
750 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
751 if (Config.EXTENDED_SM_LOGGING) {
752 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
753 }
754 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
755 this.tagWriter.writeStanzaAsync(resume);
756 } else if (needsBinding) {
757 if (this.streamFeatures.hasChild("bind")) {
758 sendBindRequest();
759 } else {
760 throw new IncompatibleServerException();
761 }
762 }
763 }
764
765 private void authenticate() throws IOException {
766 final List<String> mechanisms = extractMechanisms(streamFeatures
767 .findChild("mechanisms"));
768 final Element auth = new Element("auth");
769 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
770 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
771 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
772 } else if (mechanisms.contains("SCRAM-SHA-1")) {
773 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
774 } else if (mechanisms.contains("PLAIN")) {
775 saslMechanism = new Plain(tagWriter, account);
776 } else if (mechanisms.contains("DIGEST-MD5")) {
777 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
778 }
779 if (saslMechanism != null) {
780 final JSONObject keys = account.getKeys();
781 try {
782 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
783 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) {
784 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
785 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
786 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
787 "). Possible downgrade attack?");
788 throw new SecurityException();
789 }
790 } catch (final JSONException e) {
791 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
792 }
793 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
794 auth.setAttribute("mechanism", saslMechanism.getMechanism());
795 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
796 auth.setContent(saslMechanism.getClientFirstMessage());
797 }
798 tagWriter.writeElement(auth);
799 } else {
800 throw new IncompatibleServerException();
801 }
802 }
803
804 private List<String> extractMechanisms(final Element stream) {
805 final ArrayList<String> mechanisms = new ArrayList<>(stream
806 .getChildren().size());
807 for (final Element child : stream.getChildren()) {
808 mechanisms.add(child.getContent());
809 }
810 return mechanisms;
811 }
812
813 public void sendCaptchaRegistryRequest(String id, Data data) {
814 if (data == null) {
815 setAccountCreationFailed("");
816 } else {
817 IqPacket request = getIqGenerator().generateCreateAccountWithCaptcha(account, id, data);
818 sendIqPacket(request, createPacketReceiveHandler());
819 }
820 }
821
822 private void sendRegistryRequest() {
823 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
824 register.query("jabber:iq:register");
825 register.setTo(account.getServer());
826 sendIqPacket(register, new OnIqPacketReceived() {
827
828 @Override
829 public void onIqPacketReceived(final Account account, final IqPacket packet) {
830 boolean failed = false;
831 if (packet.getType() == IqPacket.TYPE.RESULT
832 && packet.query().hasChild("username")
833 && (packet.query().hasChild("password"))) {
834 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
835 final Element username = new Element("username").setContent(account.getUsername());
836 final Element password = new Element("password").setContent(account.getPassword());
837 register.query("jabber:iq:register").addChild(username);
838 register.query().addChild(password);
839 sendIqPacket(register, createPacketReceiveHandler());
840 } else if (packet.getType() == IqPacket.TYPE.RESULT
841 && (packet.query().hasChild("x", "jabber:x:data"))) {
842 final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
843 final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
844 final String id = packet.getId();
845
846 Bitmap captcha = null;
847 if (blob != null) {
848 try {
849 final String base64Blob = blob.getContent();
850 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
851 InputStream stream = new ByteArrayInputStream(strBlob);
852 captcha = BitmapFactory.decodeStream(stream);
853 } catch (Exception e) {
854 //ignored
855 }
856 } else {
857 try {
858 Field url = data.getFieldByName("url");
859 String urlString = url.findChildContent("value");
860 URL uri = new URL(urlString);
861 captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
862 } catch (IOException e) {
863 Log.e(Config.LOGTAG, e.toString());
864 }
865 }
866
867 if (captcha != null) {
868 failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
869 }
870 } else {
871 failed = true;
872 }
873
874 if (failed) {
875 final Element instructions = packet.query().findChild("instructions");
876 setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
877 }
878 }
879 });
880 }
881
882 private void setAccountCreationFailed(String instructions) {
883 changeStatus(Account.State.REGISTRATION_FAILED);
884 disconnect(true);
885 Log.d(Config.LOGTAG, account.getJid().toBareJid()
886 + ": could not register. instructions are"
887 + instructions);
888 }
889
890 public void resetEverything() {
891 resetStreamId();
892 clearIqCallbacks();
893 mStanzaQueue.clear();
894 synchronized (this.disco) {
895 disco.clear();
896 }
897 }
898
899 private void sendBindRequest() {
900 while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
901 try {
902 Thread.sleep(500);
903 } catch (final InterruptedException ignored) {
904 }
905 }
906 needsBinding = false;
907 clearIqCallbacks();
908 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
909 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
910 .addChild("resource").setContent(account.getResource());
911 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
912 @Override
913 public void onIqPacketReceived(final Account account, final IqPacket packet) {
914 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
915 return;
916 }
917 final Element bind = packet.findChild("bind");
918 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
919 final Element jid = bind.findChild("jid");
920 if (jid != null && jid.getContent() != null) {
921 try {
922 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
923 } catch (final InvalidJidException e) {
924 // TODO: Handle the case where an external JID is technically invalid?
925 }
926 if (streamFeatures.hasChild("session")) {
927 sendStartSession();
928 } else {
929 sendPostBindInitialization();
930 }
931 } else {
932 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
933 disconnect(true);
934 }
935 } else {
936 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
937 disconnect(true);
938 }
939 }
940 });
941 }
942
943 private void clearIqCallbacks() {
944 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
945 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
946 synchronized (this.packetCallbacks) {
947 if (this.packetCallbacks.size() == 0) {
948 return;
949 }
950 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
951 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
952 while (iterator.hasNext()) {
953 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
954 callbacks.add(entry.second);
955 iterator.remove();
956 }
957 }
958 for(OnIqPacketReceived callback : callbacks) {
959 callback.onIqPacketReceived(account,failurePacket);
960 }
961 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
962 }
963
964 public void sendDiscoTimeout() {
965 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.ERROR); //don't use timeout
966 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
967 synchronized (this.mPendingServiceDiscoveriesIds) {
968 for(String id : mPendingServiceDiscoveriesIds) {
969 synchronized (this.packetCallbacks) {
970 Pair<IqPacket, OnIqPacketReceived> pair = this.packetCallbacks.remove(id);
971 if (pair != null) {
972 callbacks.add(pair.second);
973 }
974 }
975 }
976 this.mPendingServiceDiscoveriesIds.clear();
977 }
978 if (callbacks.size() > 0) {
979 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending disco timeout");
980 resetStreamId(); //we don't want to live with this for ever
981 }
982 for(OnIqPacketReceived callback : callbacks) {
983 callback.onIqPacketReceived(account,failurePacket);
984 }
985 }
986
987 private void sendStartSession() {
988 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
989 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
990 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
991 @Override
992 public void onIqPacketReceived(Account account, IqPacket packet) {
993 if (packet.getType() == IqPacket.TYPE.RESULT) {
994 sendPostBindInitialization();
995 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
996 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
997 disconnect(true);
998 }
999 }
1000 });
1001 }
1002
1003 private void sendPostBindInitialization() {
1004 smVersion = 0;
1005 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1006 smVersion = 3;
1007 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1008 smVersion = 2;
1009 }
1010 if (smVersion != 0) {
1011 final EnablePacket enable = new EnablePacket(smVersion);
1012 tagWriter.writeStanzaAsync(enable);
1013 stanzasSent = 0;
1014 mStanzaQueue.clear();
1015 }
1016 features.carbonsEnabled = false;
1017 features.blockListRequested = false;
1018 synchronized (this.disco) {
1019 this.disco.clear();
1020 }
1021 mPendingServiceDiscoveries.set(0);
1022 mIsServiceItemsDiscoveryPending.set(true);
1023 mWaitForDisco = mServerIdentity != Identity.NIMBUZZ;
1024 lastDiscoStarted = SystemClock.elapsedRealtime();
1025 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
1026 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1027 Element caps = streamFeatures.findChild("c");
1028 final String hash = caps == null ? null : caps.getAttribute("hash");
1029 final String ver = caps == null ? null : caps.getAttribute("ver");
1030 ServiceDiscoveryResult discoveryResult = null;
1031 if (hash != null && ver != null) {
1032 discoveryResult = mXmppConnectionService.databaseBackend.findDiscoveryResult(hash, ver);
1033 }
1034 if (discoveryResult == null) {
1035 sendServiceDiscoveryInfo(account.getServer());
1036 } else {
1037 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server caps came from cache");
1038 disco.put(account.getServer(), discoveryResult);
1039 }
1040 sendServiceDiscoveryInfo(account.getJid().toBareJid());
1041 sendServiceDiscoveryItems(account.getServer());
1042 if (!mWaitForDisco) {
1043 finalizeBind();
1044 }
1045 this.lastSessionStarted = SystemClock.elapsedRealtime();
1046 }
1047
1048 private void sendServiceDiscoveryInfo(final Jid jid) {
1049 mPendingServiceDiscoveries.incrementAndGet();
1050 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1051 iq.setTo(jid);
1052 iq.query("http://jabber.org/protocol/disco#info");
1053 String id = this.sendIqPacket(iq, new OnIqPacketReceived() {
1054
1055 @Override
1056 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1057 if (packet.getType() == IqPacket.TYPE.RESULT) {
1058 boolean advancedStreamFeaturesLoaded;
1059 synchronized (XmppConnection.this.disco) {
1060 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1061 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1062 if (mServerIdentity == Identity.UNKNOWN && id.getType().equals("im") &&
1063 id.getCategory().equals("server") && id.getName() != null &&
1064 jid.equals(account.getServer())) {
1065 switch (id.getName()) {
1066 case "Prosody":
1067 mServerIdentity = Identity.PROSODY;
1068 break;
1069 case "ejabberd":
1070 mServerIdentity = Identity.EJABBERD;
1071 break;
1072 case "Slack-XMPP":
1073 mServerIdentity = Identity.SLACK;
1074 break;
1075 }
1076 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server name: " + id.getName());
1077 }
1078 }
1079 if (jid.equals(account.getServer())) {
1080 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1081 }
1082 disco.put(jid, result);
1083 advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
1084 && disco.containsKey(account.getJid().toBareJid());
1085 }
1086 if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
1087 enableAdvancedStreamFeatures();
1088 }
1089 } else {
1090 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
1091 }
1092 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1093 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1094 && !mIsServiceItemsDiscoveryPending.get()
1095 && mWaitForDisco) {
1096 finalizeBind();
1097 }
1098 }
1099 }
1100 });
1101 synchronized (this.mPendingServiceDiscoveriesIds) {
1102 this.mPendingServiceDiscoveriesIds.add(id);
1103 }
1104 }
1105
1106 private void finalizeBind() {
1107 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
1108 if (bindListener != null) {
1109 bindListener.onBind(account);
1110 }
1111 changeStatus(Account.State.ONLINE);
1112 }
1113
1114 private void enableAdvancedStreamFeatures() {
1115 if (getFeatures().carbons() && !features.carbonsEnabled) {
1116 sendEnableCarbons();
1117 }
1118 if (getFeatures().blocking() && !features.blockListRequested) {
1119 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
1120 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1121 }
1122 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1123 listener.onAdvancedStreamFeaturesAvailable(account);
1124 }
1125 }
1126
1127 private void sendServiceDiscoveryItems(final Jid server) {
1128 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1129 iq.setTo(server.toDomainJid());
1130 iq.query("http://jabber.org/protocol/disco#items");
1131 String id = this.sendIqPacket(iq, new OnIqPacketReceived() {
1132
1133 @Override
1134 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1135 if (packet.getType() == IqPacket.TYPE.RESULT) {
1136 final List<Element> elements = packet.query().getChildren();
1137 for (final Element element : elements) {
1138 if (element.getName().equals("item")) {
1139 final Jid jid = element.getAttributeAsJid("jid");
1140 if (jid != null && !jid.equals(account.getServer())) {
1141 sendServiceDiscoveryInfo(jid);
1142 }
1143 }
1144 }
1145 } else {
1146 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
1147 }
1148 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1149 mIsServiceItemsDiscoveryPending.set(false);
1150 if (mPendingServiceDiscoveries.get() == 0 && mWaitForDisco) {
1151 finalizeBind();
1152 }
1153 }
1154 }
1155 });
1156 synchronized (this.mPendingServiceDiscoveriesIds) {
1157 this.mPendingServiceDiscoveriesIds.add(id);
1158 }
1159 }
1160
1161 private void sendEnableCarbons() {
1162 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1163 iq.addChild("enable", "urn:xmpp:carbons:2");
1164 this.sendIqPacket(iq, new OnIqPacketReceived() {
1165
1166 @Override
1167 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1168 if (!packet.hasChild("error")) {
1169 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1170 + ": successfully enabled carbons");
1171 features.carbonsEnabled = true;
1172 } else {
1173 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1174 + ": error enableing carbons " + packet.toString());
1175 }
1176 }
1177 });
1178 }
1179
1180 private void processStreamError(final Tag currentTag)
1181 throws XmlPullParserException, IOException {
1182 final Element streamError = tagReader.readElement(currentTag);
1183 if (streamError != null && streamError.hasChild("conflict")) {
1184 final String resource = account.getResource().split("\\.")[0];
1185 account.setResource(resource + "." + nextRandomId());
1186 Log.d(Config.LOGTAG,
1187 account.getJid().toBareJid() + ": switching resource due to conflict ("
1188 + account.getResource() + ")");
1189 } else if (streamError != null) {
1190 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
1191 }
1192 }
1193
1194 private void sendStartStream() throws IOException {
1195 final Tag stream = Tag.start("stream:stream");
1196 stream.setAttribute("to", account.getServer().toString());
1197 stream.setAttribute("version", "1.0");
1198 stream.setAttribute("xml:lang", "en");
1199 stream.setAttribute("xmlns", "jabber:client");
1200 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1201 tagWriter.writeTag(stream);
1202 }
1203
1204 private String nextRandomId() {
1205 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
1206 }
1207
1208 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1209 packet.setFrom(account.getJid());
1210 return this.sendUnmodifiedIqPacket(packet, callback);
1211 }
1212
1213 private synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1214 if (packet.getId() == null) {
1215 final String id = nextRandomId();
1216 packet.setAttribute("id", id);
1217 }
1218 if (callback != null) {
1219 synchronized (this.packetCallbacks) {
1220 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1221 }
1222 }
1223 this.sendPacket(packet);
1224 return packet.getId();
1225 }
1226
1227 public void sendMessagePacket(final MessagePacket packet) {
1228 this.sendPacket(packet);
1229 }
1230
1231 public void sendPresencePacket(final PresencePacket packet) {
1232 this.sendPacket(packet);
1233 }
1234
1235 private synchronized void sendPacket(final AbstractStanza packet) {
1236 if (stanzasSent == Integer.MAX_VALUE) {
1237 resetStreamId();
1238 disconnect(true);
1239 return;
1240 }
1241 tagWriter.writeStanzaAsync(packet);
1242 if (packet instanceof AbstractAcknowledgeableStanza) {
1243 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1244 ++stanzasSent;
1245 this.mStanzaQueue.put(stanzasSent, stanza);
1246 if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
1247 if (Config.EXTENDED_SM_LOGGING) {
1248 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1249 }
1250 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1251 }
1252 }
1253 }
1254
1255 public void sendPing() {
1256 if (!r()) {
1257 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1258 iq.setFrom(account.getJid());
1259 iq.addChild("ping", "urn:xmpp:ping");
1260 this.sendIqPacket(iq, null);
1261 }
1262 this.lastPingSent = SystemClock.elapsedRealtime();
1263 }
1264
1265 public void setOnMessagePacketReceivedListener(
1266 final OnMessagePacketReceived listener) {
1267 this.messageListener = listener;
1268 }
1269
1270 public void setOnUnregisteredIqPacketReceivedListener(
1271 final OnIqPacketReceived listener) {
1272 this.unregisteredIqListener = listener;
1273 }
1274
1275 public void setOnPresencePacketReceivedListener(
1276 final OnPresencePacketReceived listener) {
1277 this.presenceListener = listener;
1278 }
1279
1280 public void setOnJinglePacketReceivedListener(
1281 final OnJinglePacketReceived listener) {
1282 this.jingleListener = listener;
1283 }
1284
1285 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1286 this.statusListener = listener;
1287 }
1288
1289 public void setOnBindListener(final OnBindListener listener) {
1290 this.bindListener = listener;
1291 }
1292
1293 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1294 this.acknowledgedListener = listener;
1295 }
1296
1297 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1298 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1299 this.advancedStreamFeaturesLoadedListeners.add(listener);
1300 }
1301 }
1302
1303 public void waitForPush() {
1304 if (tagWriter.isActive()) {
1305 tagWriter.finish();
1306 new Thread(new Runnable() {
1307 @Override
1308 public void run() {
1309 try {
1310 while(!tagWriter.finished()) {
1311 Thread.sleep(10);
1312 }
1313 socket.close();
1314 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closed tcp without closing stream");
1315 } catch (IOException e) {
1316 e.printStackTrace();
1317 } catch (InterruptedException e) {
1318 e.printStackTrace();
1319 }
1320 }
1321 }).start();
1322 } else {
1323 forceCloseSocket();
1324 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": closed tcp without closing stream (no waiting)");
1325 }
1326 }
1327
1328 private void forceCloseSocket() {
1329 if (socket != null) {
1330 try {
1331 socket.close();
1332 } catch (IOException e) {
1333 e.printStackTrace();
1334 }
1335 }
1336 }
1337
1338 public void disconnect(final boolean force) {
1339 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
1340 if (force) {
1341 forceCloseSocket();
1342 return;
1343 } else {
1344 if (tagWriter.isActive()) {
1345 tagWriter.finish();
1346 try {
1347 int i = 0;
1348 boolean warned = false;
1349 while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
1350 if (!warned) {
1351 Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
1352 warned = true;
1353 }
1354 Thread.sleep(200);
1355 i++;
1356 }
1357 if (warned) {
1358 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
1359 }
1360 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
1361 tagWriter.writeTag(Tag.end("stream:stream"));
1362 } catch (final IOException e) {
1363 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
1364 } catch (final InterruptedException e) {
1365 Log.d(Config.LOGTAG, "interrupted");
1366 }
1367 }
1368 }
1369 }
1370
1371 public void resetStreamId() {
1372 this.streamId = null;
1373 }
1374
1375 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1376 synchronized (this.disco) {
1377 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1378 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1379 if (cursor.getValue().getFeatures().contains(feature)) {
1380 items.add(cursor);
1381 }
1382 }
1383 return items;
1384 }
1385 }
1386
1387 public Jid findDiscoItemByFeature(final String feature) {
1388 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1389 if (items.size() >= 1) {
1390 return items.get(0).getKey();
1391 }
1392 return null;
1393 }
1394
1395 public boolean r() {
1396 if (getFeatures().sm()) {
1397 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1398 return true;
1399 } else {
1400 return false;
1401 }
1402 }
1403
1404 public String getMucServer() {
1405 synchronized (this.disco) {
1406 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1407 final ServiceDiscoveryResult value = cursor.getValue();
1408 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1409 && !value.getFeatures().contains("jabber:iq:gateway")
1410 && !value.hasIdentity("conference", "irc")) {
1411 return cursor.getKey().toString();
1412 }
1413 }
1414 }
1415 return null;
1416 }
1417
1418 public int getTimeToNextAttempt() {
1419 final int interval = (int) (25 * Math.pow(1.5, attempt));
1420 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1421 return interval - secondsSinceLast;
1422 }
1423
1424 public int getAttempt() {
1425 return this.attempt;
1426 }
1427
1428 public Features getFeatures() {
1429 return this.features;
1430 }
1431
1432 public long getLastSessionEstablished() {
1433 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1434 return System.currentTimeMillis() - diff;
1435 }
1436
1437 public long getLastConnect() {
1438 return this.lastConnect;
1439 }
1440
1441 public long getLastPingSent() {
1442 return this.lastPingSent;
1443 }
1444
1445 public long getLastDiscoStarted() {
1446 return this.lastDiscoStarted;
1447 }
1448 public long getLastPacketReceived() {
1449 return this.lastPacketReceived;
1450 }
1451
1452 public void sendActive() {
1453 this.sendPacket(new ActivePacket());
1454 }
1455
1456 public void sendInactive() {
1457 this.sendPacket(new InactivePacket());
1458 }
1459
1460 public void resetAttemptCount() {
1461 this.attempt = 0;
1462 this.lastConnect = 0;
1463 }
1464
1465 public void setInteractive(boolean interactive) {
1466 this.mInteractive = interactive;
1467 }
1468
1469 public Identity getServerIdentity() {
1470 return mServerIdentity;
1471 }
1472
1473 private class UnauthorizedException extends IOException {
1474
1475 }
1476
1477 private class SecurityException extends IOException {
1478
1479 }
1480
1481 private class IncompatibleServerException extends IOException {
1482
1483 }
1484
1485 public enum Identity {
1486 FACEBOOK,
1487 SLACK,
1488 EJABBERD,
1489 PROSODY,
1490 NIMBUZZ,
1491 UNKNOWN
1492 }
1493
1494 public class Features {
1495 XmppConnection connection;
1496 private boolean carbonsEnabled = false;
1497 private boolean encryptionEnabled = false;
1498 private boolean blockListRequested = false;
1499
1500 public Features(final XmppConnection connection) {
1501 this.connection = connection;
1502 }
1503
1504 private boolean hasDiscoFeature(final Jid server, final String feature) {
1505 synchronized (XmppConnection.this.disco) {
1506 return connection.disco.containsKey(server) &&
1507 connection.disco.get(server).getFeatures().contains(feature);
1508 }
1509 }
1510
1511 public boolean carbons() {
1512 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1513 }
1514
1515 public boolean blocking() {
1516 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1517 }
1518
1519 public boolean register() {
1520 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1521 }
1522
1523 public boolean sm() {
1524 return streamId != null
1525 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1526 }
1527
1528 public boolean csi() {
1529 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1530 }
1531
1532 public boolean pep() {
1533 synchronized (XmppConnection.this.disco) {
1534 ServiceDiscoveryResult info = disco.get(account.getServer());
1535 if (info != null && info.hasIdentity("pubsub", "pep")) {
1536 return true;
1537 } else {
1538 info = disco.get(account.getJid().toBareJid());
1539 return info != null && info.hasIdentity("pubsub", "pep");
1540 }
1541 }
1542 }
1543
1544 public boolean mam() {
1545 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")
1546 || hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1547 }
1548
1549 public boolean push() {
1550 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:push:0")
1551 || hasDiscoFeature(account.getServer(), "urn:xmpp:push:0");
1552 }
1553
1554 public boolean rosterVersioning() {
1555 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1556 }
1557
1558 public void setBlockListRequested(boolean value) {
1559 this.blockListRequested = value;
1560 }
1561
1562 public boolean httpUpload(long filesize) {
1563 if (Config.DISABLE_HTTP_UPLOAD) {
1564 return false;
1565 } else {
1566 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1567 if (items.size() > 0) {
1568 try {
1569 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1570 return filesize <= maxsize;
1571 } catch (Exception e) {
1572 return true;
1573 }
1574 } else {
1575 return false;
1576 }
1577 }
1578 }
1579
1580 public long getMaxHttpUploadSize() {
1581 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1582 if (items.size() > 0) {
1583 try {
1584 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1585 } catch (Exception e) {
1586 return -1;
1587 }
1588 } else {
1589 return -1;
1590 }
1591 }
1592 }
1593
1594 private IqGenerator getIqGenerator() {
1595 return mXmppConnectionService.getIqGenerator();
1596 }
1597}