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;
42
43import javax.net.ssl.HostnameVerifier;
44import javax.net.ssl.KeyManager;
45import javax.net.ssl.SSLContext;
46import javax.net.ssl.SSLSocket;
47import javax.net.ssl.SSLSocketFactory;
48import javax.net.ssl.X509KeyManager;
49import javax.net.ssl.X509TrustManager;
50
51import de.duenndns.ssl.MemorizingTrustManager;
52import eu.siacs.conversations.Config;
53import eu.siacs.conversations.crypto.XmppDomainVerifier;
54import eu.siacs.conversations.crypto.sasl.DigestMd5;
55import eu.siacs.conversations.crypto.sasl.External;
56import eu.siacs.conversations.crypto.sasl.Plain;
57import eu.siacs.conversations.crypto.sasl.SaslMechanism;
58import eu.siacs.conversations.crypto.sasl.ScramSha1;
59import eu.siacs.conversations.entities.Account;
60import eu.siacs.conversations.entities.Message;
61import eu.siacs.conversations.generator.IqGenerator;
62import eu.siacs.conversations.services.XmppConnectionService;
63import eu.siacs.conversations.utils.CryptoHelper;
64import eu.siacs.conversations.utils.DNSHelper;
65import eu.siacs.conversations.utils.SSLSocketHelper;
66import eu.siacs.conversations.utils.SocksSocketFactory;
67import eu.siacs.conversations.utils.Xmlns;
68import eu.siacs.conversations.xml.Element;
69import eu.siacs.conversations.xml.Tag;
70import eu.siacs.conversations.xml.TagWriter;
71import eu.siacs.conversations.xml.XmlReader;
72import eu.siacs.conversations.xmpp.forms.Data;
73import eu.siacs.conversations.xmpp.forms.Field;
74import eu.siacs.conversations.xmpp.jid.InvalidJidException;
75import eu.siacs.conversations.xmpp.jid.Jid;
76import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
77import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
78import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
79import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
80import eu.siacs.conversations.xmpp.stanzas.IqPacket;
81import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
82import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
83import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
84import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
85import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
86import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
87import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
88import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
89
90public class XmppConnection implements Runnable {
91
92 private static final int PACKET_IQ = 0;
93 private static final int PACKET_MESSAGE = 1;
94 private static final int PACKET_PRESENCE = 2;
95 protected Account account;
96 private final WakeLock wakeLock;
97 private Socket socket;
98 private XmlReader tagReader;
99 private TagWriter tagWriter;
100 private final Features features = new Features(this);
101 private boolean needsBinding = true;
102 private boolean shouldAuthenticate = true;
103 private Element streamFeatures;
104 private final HashMap<Jid, Info> disco = new HashMap<>();
105
106 private String streamId = null;
107 private int smVersion = 3;
108 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
109
110 private int stanzasReceived = 0;
111 private int stanzasSent = 0;
112 private long lastPacketReceived = 0;
113 private long lastPingSent = 0;
114 private long lastConnect = 0;
115 private long lastSessionStarted = 0;
116 private long lastDiscoStarted = 0;
117 private int mPendingServiceDiscoveries = 0;
118 private final ArrayList<String> mPendingServiceDiscoveriesIds = new ArrayList<>();
119 private boolean mInteractive = false;
120 private int attempt = 0;
121 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
122 private OnPresencePacketReceived presenceListener = null;
123 private OnJinglePacketReceived jingleListener = null;
124 private OnIqPacketReceived unregisteredIqListener = null;
125 private OnMessagePacketReceived messageListener = null;
126 private OnStatusChanged statusListener = null;
127 private OnBindListener bindListener = null;
128 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
129 private OnMessageAcknowledged acknowledgedListener = null;
130 private XmppConnectionService mXmppConnectionService = null;
131
132 private SaslMechanism saslMechanism;
133
134 private X509KeyManager mKeyManager = new X509KeyManager() {
135 @Override
136 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
137 return account.getPrivateKeyAlias();
138 }
139
140 @Override
141 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
142 return null;
143 }
144
145 @Override
146 public X509Certificate[] getCertificateChain(String alias) {
147 try {
148 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
149 } catch (Exception e) {
150 return new X509Certificate[0];
151 }
152 }
153
154 @Override
155 public String[] getClientAliases(String s, Principal[] principals) {
156 return new String[0];
157 }
158
159 @Override
160 public String[] getServerAliases(String s, Principal[] principals) {
161 return new String[0];
162 }
163
164 @Override
165 public PrivateKey getPrivateKey(String alias) {
166 try {
167 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
168 } catch (Exception e) {
169 return null;
170 }
171 }
172 };
173 private Identity mServerIdentity = Identity.UNKNOWN;
174
175 private OnIqPacketReceived createPacketReceiveHandler() {
176 return new OnIqPacketReceived() {
177 @Override
178 public void onIqPacketReceived(Account account, IqPacket packet) {
179 if (packet.getType() == IqPacket.TYPE.RESULT) {
180 account.setOption(Account.OPTION_REGISTER,
181 false);
182 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
183 } else if (packet.hasChild("error")
184 && (packet.findChild("error")
185 .hasChild("conflict"))) {
186 changeStatus(Account.State.REGISTRATION_CONFLICT);
187 } else {
188 changeStatus(Account.State.REGISTRATION_FAILED);
189 Log.d(Config.LOGTAG, packet.toString());
190 }
191 disconnect(true);
192 }
193 };
194 }
195
196 public XmppConnection(final Account account, final XmppConnectionService service) {
197 this.account = account;
198 this.wakeLock = service.getPowerManager().newWakeLock(
199 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
200 tagWriter = new TagWriter();
201 mXmppConnectionService = service;
202 }
203
204 protected void changeStatus(final Account.State nextStatus) {
205 if (account.getStatus() != nextStatus) {
206 if ((nextStatus == Account.State.OFFLINE)
207 && (account.getStatus() != Account.State.CONNECTING)
208 && (account.getStatus() != Account.State.ONLINE)
209 && (account.getStatus() != Account.State.DISABLED)) {
210 return;
211 }
212 if (nextStatus == Account.State.ONLINE) {
213 this.attempt = 0;
214 }
215 account.setStatus(nextStatus);
216 if (statusListener != null) {
217 statusListener.onStatusChanged(account);
218 }
219 }
220 }
221
222 protected void connect() {
223 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
224 features.encryptionEnabled = false;
225 lastConnect = SystemClock.elapsedRealtime();
226 lastPingSent = SystemClock.elapsedRealtime();
227 lastDiscoStarted = Long.MAX_VALUE;
228 this.attempt++;
229 if (account.getJid().getDomainpart().equals("chat.facebook.com")) {
230 mServerIdentity = Identity.FACEBOOK;
231 }
232 try {
233 shouldAuthenticate = needsBinding = !account.isOptionSet(Account.OPTION_REGISTER);
234 tagReader = new XmlReader(wakeLock);
235 tagWriter = new TagWriter();
236 this.changeStatus(Account.State.CONNECTING);
237 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
238 if (useTor) {
239 String destination;
240 if (account.getHostname() == null || account.getHostname().isEmpty()) {
241 destination = account.getServer().toString();
242 } else {
243 destination = account.getHostname();
244 }
245 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": connect to "+destination+" via TOR");
246 socket = SocksSocketFactory.createSocketOverTor(destination,account.getPort());
247 startXmpp();
248 } else if (DNSHelper.isIp(account.getServer().toString())) {
249 socket = new Socket();
250 try {
251 socket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
252 } catch (IOException e) {
253 throw new UnknownHostException();
254 }
255 startXmpp();
256 } else {
257 final Bundle result = DNSHelper.getSRVRecord(account.getServer(), mXmppConnectionService);
258 final ArrayList<Parcelable>values = result.getParcelableArrayList("values");
259 for(Iterator<Parcelable> iterator = values.iterator(); iterator.hasNext();) {
260 final Bundle namePort = (Bundle) iterator.next();
261 try {
262 String srvRecordServer;
263 try {
264 srvRecordServer = IDN.toASCII(namePort.getString("name"));
265 } catch (final IllegalArgumentException e) {
266 // TODO: Handle me?`
267 srvRecordServer = "";
268 }
269 final int srvRecordPort = namePort.getInt("port");
270 final String srvIpServer = namePort.getString("ip");
271 // if tls is true, encryption is implied and must not be started
272 features.encryptionEnabled = namePort.getBoolean("tls");
273 final InetSocketAddress addr;
274 if (srvIpServer != null) {
275 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
276 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
277 + ": using values from dns " + srvRecordServer
278 + "[" + srvIpServer + "]:" + srvRecordPort + " tls: " + features.encryptionEnabled);
279 } else {
280 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
281 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
282 + ": using values from dns "
283 + srvRecordServer + ":" + srvRecordPort + " tls: " + features.encryptionEnabled);
284 }
285
286 if (!features.encryptionEnabled) {
287 socket = new Socket();
288 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
289 } else {
290 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
291 socket = tlsFactoryVerifier.factory.createSocket();
292
293 if (socket == null) {
294 throw new IOException("could not initialize ssl socket");
295 }
296
297 SSLSocketHelper.setSecurity((SSLSocket) socket);
298 SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) socket, account.getServer().getDomainpart());
299 SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) socket, "xmpp-client");
300
301 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
302
303 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) socket).getSession())) {
304 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
305 throw new SecurityException();
306 }
307 }
308
309 if (startXmpp())
310 break; // successfully connected to server that speaks xmpp
311 } catch(final SecurityException e) {
312 throw e;
313 } catch (final Throwable e) {
314 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() +"("+e.getClass().getName()+")");
315 if (!iterator.hasNext()) {
316 throw new UnknownHostException();
317 }
318 }
319 }
320 }
321 processStream();
322 } catch (final IncompatibleServerException e) {
323 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
324 } catch (final SecurityException e) {
325 this.changeStatus(Account.State.SECURITY_ERROR);
326 } catch (final UnauthorizedException e) {
327 this.changeStatus(Account.State.UNAUTHORIZED);
328 } catch (final UnknownHostException | ConnectException e) {
329 this.changeStatus(Account.State.SERVER_NOT_FOUND);
330 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
331 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
332 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
333 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
334 this.changeStatus(Account.State.OFFLINE);
335 this.attempt--; //don't count attempt when reconnecting instantly anyway
336 } finally {
337 if (socket != null) {
338 try {
339 socket.close();
340 } catch (IOException e) {
341
342 }
343 }
344 if (wakeLock.isHeld()) {
345 try {
346 wakeLock.release();
347 } catch (final RuntimeException ignored) {
348 }
349 }
350 }
351 }
352
353 /**
354 * Starts xmpp protocol, call after connecting to socket
355 * @return true if server returns with valid xmpp, false otherwise
356 * @throws IOException Unknown tag on connect
357 * @throws XmlPullParserException Bad Xml
358 * @throws NoSuchAlgorithmException Other error
359 */
360 private boolean startXmpp() throws IOException, XmlPullParserException, NoSuchAlgorithmException {
361 tagWriter.setOutputStream(socket.getOutputStream());
362 tagReader.setInputStream(socket.getInputStream());
363 tagWriter.beginDocument();
364 sendStartStream();
365 Tag nextTag;
366 while ((nextTag = tagReader.readTag()) != null) {
367 if (nextTag.isStart("stream")) {
368 return true;
369 } else {
370 throw new IOException("unknown tag on connect");
371 }
372 }
373 if (socket.isConnected()) {
374 socket.close();
375 }
376 return false;
377 }
378
379 private static class TlsFactoryVerifier {
380 private final SSLSocketFactory factory;
381 private final HostnameVerifier verifier;
382
383 public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
384 this.factory = factory;
385 this.verifier = verifier;
386 if (factory == null || verifier == null) {
387 throw new IOException("could not setup ssl");
388 }
389 }
390 }
391
392 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
393 final SSLContext sc = SSLContext.getInstance("TLS");
394 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
395 KeyManager[] keyManager;
396 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
397 keyManager = new KeyManager[]{mKeyManager};
398 } else {
399 keyManager = null;
400 }
401 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()}, mXmppConnectionService.getRNG());
402 final SSLSocketFactory factory = sc.getSocketFactory();
403 final HostnameVerifier verifier;
404 if (mInteractive) {
405 verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
406 } else {
407 verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
408 }
409
410 return new TlsFactoryVerifier(factory, verifier);
411 }
412
413 @Override
414 public void run() {
415 try {
416 if (socket != null) {
417 socket.close();
418 }
419 } catch (final IOException ignored) {
420
421 }
422 connect();
423 }
424
425 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
426 Tag nextTag = tagReader.readTag();
427 while (nextTag != null && !nextTag.isEnd("stream")) {
428 if (nextTag.isStart("error")) {
429 processStreamError(nextTag);
430 } else if (nextTag.isStart("features")) {
431 processStreamFeatures(nextTag);
432 } else if (nextTag.isStart("proceed")) {
433 switchOverToTls(nextTag);
434 } else if (nextTag.isStart("success")) {
435 final String challenge = tagReader.readElement(nextTag).getContent();
436 try {
437 saslMechanism.getResponse(challenge);
438 } catch (final SaslMechanism.AuthenticationException e) {
439 disconnect(true);
440 Log.e(Config.LOGTAG, String.valueOf(e));
441 }
442 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
443 account.setKey(Account.PINNED_MECHANISM_KEY,
444 String.valueOf(saslMechanism.getPriority()));
445 tagReader.reset();
446 sendStartStream();
447 final Tag tag = tagReader.readTag();
448 if (tag != null && tag.isStart("stream")) {
449 processStream();
450 } else {
451 throw new IOException("server didn't restart stream after successful auth");
452 }
453 break;
454 } else if (nextTag.isStart("failure")) {
455 throw new UnauthorizedException();
456 } else if (nextTag.isStart("challenge")) {
457 final String challenge = tagReader.readElement(nextTag).getContent();
458 final Element response = new Element("response");
459 response.setAttribute("xmlns",
460 "urn:ietf:params:xml:ns:xmpp-sasl");
461 try {
462 response.setContent(saslMechanism.getResponse(challenge));
463 } catch (final SaslMechanism.AuthenticationException e) {
464 // TODO: Send auth abort tag.
465 Log.e(Config.LOGTAG, e.toString());
466 }
467 tagWriter.writeElement(response);
468 } else if (nextTag.isStart("enabled")) {
469 final Element enabled = tagReader.readElement(nextTag);
470 if ("true".equals(enabled.getAttribute("resume"))) {
471 this.streamId = enabled.getAttribute("id");
472 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
473 + ": stream managment(" + smVersion
474 + ") enabled (resumable)");
475 } else {
476 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
477 + ": stream management(" + smVersion + ") enabled");
478 }
479 this.stanzasReceived = 0;
480 final RequestPacket r = new RequestPacket(smVersion);
481 tagWriter.writeStanzaAsync(r);
482 } else if (nextTag.isStart("resumed")) {
483 lastPacketReceived = SystemClock.elapsedRealtime();
484 final Element resumed = tagReader.readElement(nextTag);
485 final String h = resumed.getAttribute("h");
486 try {
487 final int serverCount = Integer.parseInt(h);
488 if (serverCount != stanzasSent) {
489 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
490 + ": session resumed with lost packages");
491 stanzasSent = serverCount;
492 } else {
493 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
494 }
495 acknowledgeStanzaUpTo(serverCount);
496 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
497 for(int i = 0; i < this.mStanzaQueue.size(); ++i) {
498 failedStanzas.add(mStanzaQueue.valueAt(i));
499 }
500 mStanzaQueue.clear();
501 Log.d(Config.LOGTAG,"resending "+failedStanzas.size()+" stanzas");
502 for(AbstractAcknowledgeableStanza packet : failedStanzas) {
503 if (packet instanceof MessagePacket) {
504 MessagePacket message = (MessagePacket) packet;
505 mXmppConnectionService.markMessage(account,
506 message.getTo().toBareJid(),
507 message.getId(),
508 Message.STATUS_UNSEND);
509 }
510 sendPacket(packet);
511 }
512 } catch (final NumberFormatException ignored) {
513 }
514 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
515 changeStatus(Account.State.ONLINE);
516 } else if (nextTag.isStart("r")) {
517 tagReader.readElement(nextTag);
518 if (Config.EXTENDED_SM_LOGGING) {
519 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
520 }
521 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
522 tagWriter.writeStanzaAsync(ack);
523 } else if (nextTag.isStart("a")) {
524 final Element ack = tagReader.readElement(nextTag);
525 lastPacketReceived = SystemClock.elapsedRealtime();
526 try {
527 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
528 acknowledgeStanzaUpTo(serverSequence);
529 } catch (NumberFormatException e) {
530 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
531 }
532 } else if (nextTag.isStart("failed")) {
533 tagReader.readElement(nextTag);
534 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
535 streamId = null;
536 if (account.getStatus() != Account.State.ONLINE) {
537 sendBindRequest();
538 }
539 } else if (nextTag.isStart("iq")) {
540 processIq(nextTag);
541 } else if (nextTag.isStart("message")) {
542 processMessage(nextTag);
543 } else if (nextTag.isStart("presence")) {
544 processPresence(nextTag);
545 }
546 nextTag = tagReader.readTag();
547 }
548 throw new IOException("reached end of stream. last tag was "+nextTag);
549 }
550
551 private void acknowledgeStanzaUpTo(int serverCount) {
552 for (int i = 0; i < mStanzaQueue.size(); ++i) {
553 if (serverCount >= mStanzaQueue.keyAt(i)) {
554 if (Config.EXTENDED_SM_LOGGING) {
555 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
556 }
557 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
558 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
559 MessagePacket packet = (MessagePacket) stanza;
560 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
561 }
562 mStanzaQueue.removeAt(i);
563 i--;
564 }
565 }
566 }
567
568 private Element processPacket(final Tag currentTag, final int packetType)
569 throws XmlPullParserException, IOException {
570 Element element;
571 switch (packetType) {
572 case PACKET_IQ:
573 element = new IqPacket();
574 break;
575 case PACKET_MESSAGE:
576 element = new MessagePacket();
577 break;
578 case PACKET_PRESENCE:
579 element = new PresencePacket();
580 break;
581 default:
582 return null;
583 }
584 element.setAttributes(currentTag.getAttributes());
585 Tag nextTag = tagReader.readTag();
586 if (nextTag == null) {
587 throw new IOException("interrupted mid tag");
588 }
589 while (!nextTag.isEnd(element.getName())) {
590 if (!nextTag.isNo()) {
591 final Element child = tagReader.readElement(nextTag);
592 final String type = currentTag.getAttribute("type");
593 if (packetType == PACKET_IQ
594 && "jingle".equals(child.getName())
595 && ("set".equalsIgnoreCase(type) || "get"
596 .equalsIgnoreCase(type))) {
597 element = new JinglePacket();
598 element.setAttributes(currentTag.getAttributes());
599 }
600 element.addChild(child);
601 }
602 nextTag = tagReader.readTag();
603 if (nextTag == null) {
604 throw new IOException("interrupted mid tag");
605 }
606 }
607 if (stanzasReceived == Integer.MAX_VALUE) {
608 resetStreamId();
609 throw new IOException("time to restart the session. cant handle >2 billion pcks");
610 }
611 ++stanzasReceived;
612 lastPacketReceived = SystemClock.elapsedRealtime();
613 return element;
614 }
615
616 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
617 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
618
619 if (packet.getId() == null) {
620 return; // an iq packet without id is definitely invalid
621 }
622
623 if (packet instanceof JinglePacket) {
624 if (this.jingleListener != null) {
625 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
626 }
627 } else {
628 OnIqPacketReceived callback = null;
629 synchronized (this.packetCallbacks) {
630 if (packetCallbacks.containsKey(packet.getId())) {
631 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
632 // Packets to the server should have responses from the server
633 if (packetCallbackDuple.first.toServer(account)) {
634 if (packet.fromServer(account) || mServerIdentity == Identity.FACEBOOK) {
635 callback = packetCallbackDuple.second;
636 packetCallbacks.remove(packet.getId());
637 } else {
638 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
639 }
640 } else {
641 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
642 callback = packetCallbackDuple.second;
643 packetCallbacks.remove(packet.getId());
644 } else {
645 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
646 }
647 }
648 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
649 callback = this.unregisteredIqListener;
650 }
651 }
652 if (callback != null) {
653 callback.onIqPacketReceived(account,packet);
654 }
655 }
656 }
657
658 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
659 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
660 this.messageListener.onMessagePacketReceived(account, packet);
661 }
662
663 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
664 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
665 this.presenceListener.onPresencePacketReceived(account, packet);
666 }
667
668 private void sendStartTLS() throws IOException {
669 final Tag startTLS = Tag.empty("starttls");
670 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
671 tagWriter.writeTag(startTLS);
672 }
673
674
675
676 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
677 tagReader.readTag();
678 try {
679 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
680 final InetAddress address = socket == null ? null : socket.getInetAddress();
681
682 if (address == null) {
683 throw new IOException("could not setup ssl");
684 }
685
686 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
687
688 if (sslSocket == null) {
689 throw new IOException("could not initialize ssl socket");
690 }
691
692 SSLSocketHelper.setSecurity(sslSocket);
693
694 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
695 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
696 throw new SecurityException();
697 }
698 tagReader.setInputStream(sslSocket.getInputStream());
699 tagWriter.setOutputStream(sslSocket.getOutputStream());
700 sendStartStream();
701 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
702 features.encryptionEnabled = true;
703 final Tag tag = tagReader.readTag();
704 if (tag != null && tag.isStart("stream")) {
705 processStream();
706 } else {
707 throw new IOException("server didn't restart stream after STARTTLS");
708 }
709 sslSocket.close();
710 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
711 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
712 throw new SecurityException();
713 }
714 }
715
716 private void processStreamFeatures(final Tag currentTag)
717 throws XmlPullParserException, IOException {
718 this.streamFeatures = tagReader.readElement(currentTag);
719 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
720 sendStartTLS();
721 } else if (this.streamFeatures.hasChild("register")
722 && account.isOptionSet(Account.OPTION_REGISTER)
723 && features.encryptionEnabled) {
724 sendRegistryRequest();
725 } else if (!this.streamFeatures.hasChild("register")
726 && account.isOptionSet(Account.OPTION_REGISTER)) {
727 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
728 disconnect(true);
729 } else if (this.streamFeatures.hasChild("mechanisms")
730 && shouldAuthenticate && features.encryptionEnabled) {
731 final List<String> mechanisms = extractMechanisms(streamFeatures
732 .findChild("mechanisms"));
733 final Element auth = new Element("auth");
734 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
735 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
736 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
737 } else if (mechanisms.contains("SCRAM-SHA-1")) {
738 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
739 } else if (mechanisms.contains("PLAIN")) {
740 saslMechanism = new Plain(tagWriter, account);
741 } else if (mechanisms.contains("DIGEST-MD5")) {
742 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
743 }
744 if (saslMechanism != null) {
745 final JSONObject keys = account.getKeys();
746 try {
747 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
748 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) {
749 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
750 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
751 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
752 "). Possible downgrade attack?");
753 throw new SecurityException();
754 }
755 } catch (final JSONException e) {
756 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
757 }
758 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
759 auth.setAttribute("mechanism", saslMechanism.getMechanism());
760 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
761 auth.setContent(saslMechanism.getClientFirstMessage());
762 }
763 tagWriter.writeElement(auth);
764 } else {
765 throw new IncompatibleServerException();
766 }
767 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
768 if (Config.EXTENDED_SM_LOGGING) {
769 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
770 }
771 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
772 this.tagWriter.writeStanzaAsync(resume);
773 } else if (needsBinding) {
774 if (this.streamFeatures.hasChild("bind")) {
775 sendBindRequest();
776 } else {
777 throw new IncompatibleServerException();
778 }
779 }
780 }
781
782 private List<String> extractMechanisms(final Element stream) {
783 final ArrayList<String> mechanisms = new ArrayList<>(stream
784 .getChildren().size());
785 for (final Element child : stream.getChildren()) {
786 mechanisms.add(child.getContent());
787 }
788 return mechanisms;
789 }
790
791 public void sendCaptchaRegistryRequest(String id, Data data) {
792 if (data == null) {
793 setAccountCreationFailed("");
794 } else {
795 IqPacket request = getIqGenerator().generateCreateAccountWithCaptcha(account, id, data);
796 sendIqPacket(request, createPacketReceiveHandler());
797 }
798 }
799
800 private void sendRegistryRequest() {
801 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
802 register.query("jabber:iq:register");
803 register.setTo(account.getServer());
804 sendIqPacket(register, new OnIqPacketReceived() {
805
806 @Override
807 public void onIqPacketReceived(final Account account, final IqPacket packet) {
808 boolean failed = false;
809 if (packet.getType() == IqPacket.TYPE.RESULT
810 && packet.query().hasChild("username")
811 && (packet.query().hasChild("password"))) {
812 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
813 final Element username = new Element("username").setContent(account.getUsername());
814 final Element password = new Element("password").setContent(account.getPassword());
815 register.query("jabber:iq:register").addChild(username);
816 register.query().addChild(password);
817 sendIqPacket(register, createPacketReceiveHandler());
818 } else if (packet.getType() == IqPacket.TYPE.RESULT
819 && (packet.query().hasChild("x", "jabber:x:data"))) {
820 final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
821 final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
822 final String id = packet.getId();
823
824 Bitmap captcha = null;
825 if (blob != null) {
826 try {
827 final String base64Blob = blob.getContent();
828 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
829 InputStream stream = new ByteArrayInputStream(strBlob);
830 captcha = BitmapFactory.decodeStream(stream);
831 } catch (Exception e) {
832 //ignored
833 }
834 } else {
835 try {
836 Field url = data.getFieldByName("url");
837 String urlString = url.findChildContent("value");
838 URL uri = new URL(urlString);
839 captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
840 } catch (IOException e) {
841 Log.e(Config.LOGTAG, e.toString());
842 }
843 }
844
845 if (captcha != null) {
846 failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
847 }
848 } else {
849 failed = true;
850 }
851
852 if (failed) {
853 final Element instructions = packet.query().findChild("instructions");
854 setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
855 }
856 }
857 });
858 }
859
860 private void setAccountCreationFailed(String instructions) {
861 changeStatus(Account.State.REGISTRATION_FAILED);
862 disconnect(true);
863 Log.d(Config.LOGTAG, account.getJid().toBareJid()
864 + ": could not register. instructions are"
865 + instructions);
866 }
867
868 private void sendBindRequest() {
869 while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
870 try {
871 Thread.sleep(500);
872 } catch (final InterruptedException ignored) {
873 }
874 }
875 needsBinding = false;
876 clearIqCallbacks();
877 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
878 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
879 .addChild("resource").setContent(account.getResource());
880 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
881 @Override
882 public void onIqPacketReceived(final Account account, final IqPacket packet) {
883 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
884 return;
885 }
886 final Element bind = packet.findChild("bind");
887 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
888 final Element jid = bind.findChild("jid");
889 if (jid != null && jid.getContent() != null) {
890 try {
891 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
892 } catch (final InvalidJidException e) {
893 // TODO: Handle the case where an external JID is technically invalid?
894 }
895 if (streamFeatures.hasChild("session")) {
896 sendStartSession();
897 } else {
898 sendPostBindInitialization();
899 }
900 } else {
901 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure");
902 disconnect(true);
903 }
904 } else {
905 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure");
906 disconnect(true);
907 }
908 }
909 });
910 }
911
912 private void clearIqCallbacks() {
913 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
914 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
915 synchronized (this.packetCallbacks) {
916 if (this.packetCallbacks.size() == 0) {
917 return;
918 }
919 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
920 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
921 while (iterator.hasNext()) {
922 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
923 callbacks.add(entry.second);
924 iterator.remove();
925 }
926 }
927 for(OnIqPacketReceived callback : callbacks) {
928 callback.onIqPacketReceived(account,failurePacket);
929 }
930 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
931 }
932
933 public void sendDiscoTimeout() {
934 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.ERROR); //don't use timeout
935 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
936 synchronized (this.mPendingServiceDiscoveriesIds) {
937 for(String id : mPendingServiceDiscoveriesIds) {
938 synchronized (this.packetCallbacks) {
939 Pair<IqPacket, OnIqPacketReceived> pair = this.packetCallbacks.remove(id);
940 if (pair != null) {
941 callbacks.add(pair.second);
942 }
943 }
944 }
945 this.mPendingServiceDiscoveriesIds.clear();
946 }
947 if (callbacks.size() > 0) {
948 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending disco timeout");
949 resetStreamId(); //we don't want to live with this for ever
950 }
951 for(OnIqPacketReceived callback : callbacks) {
952 callback.onIqPacketReceived(account,failurePacket);
953 }
954 }
955
956 private void sendStartSession() {
957 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
958 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
959 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
960 @Override
961 public void onIqPacketReceived(Account account, IqPacket packet) {
962 if (packet.getType() == IqPacket.TYPE.RESULT) {
963 sendPostBindInitialization();
964 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
965 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
966 disconnect(true);
967 }
968 }
969 });
970 }
971
972 private void sendPostBindInitialization() {
973 smVersion = 0;
974 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
975 smVersion = 3;
976 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
977 smVersion = 2;
978 }
979 if (smVersion != 0) {
980 final EnablePacket enable = new EnablePacket(smVersion);
981 tagWriter.writeStanzaAsync(enable);
982 stanzasSent = 0;
983 mStanzaQueue.clear();
984 }
985 features.carbonsEnabled = false;
986 features.blockListRequested = false;
987 synchronized (this.disco) {
988 this.disco.clear();
989 }
990 mPendingServiceDiscoveries = 0;
991 lastDiscoStarted = SystemClock.elapsedRealtime();
992 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
993 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
994 sendServiceDiscoveryItems(account.getServer());
995 sendServiceDiscoveryInfo(account.getServer());
996 sendServiceDiscoveryInfo(account.getJid().toBareJid());
997 this.lastSessionStarted = SystemClock.elapsedRealtime();
998 }
999
1000 private void sendServiceDiscoveryInfo(final Jid jid) {
1001 mPendingServiceDiscoveries++;
1002 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1003 iq.setTo(jid);
1004 iq.query("http://jabber.org/protocol/disco#info");
1005 String id = this.sendIqPacket(iq, new OnIqPacketReceived() {
1006
1007 @Override
1008 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1009 if (packet.getType() == IqPacket.TYPE.RESULT) {
1010 boolean advancedStreamFeaturesLoaded = false;
1011 synchronized (XmppConnection.this.disco) {
1012 final List<Element> elements = packet.query().getChildren();
1013 final Info info = new Info();
1014 for (final Element element : elements) {
1015 if (element.getName().equals("identity")) {
1016 String type = element.getAttribute("type");
1017 String category = element.getAttribute("category");
1018 String name = element.getAttribute("name");
1019 if (type != null && category != null) {
1020 info.identities.add(new Pair<>(category, type));
1021 if (type.equals("im") && category.equals("server")) {
1022 if (name != null && jid.equals(account.getServer())) {
1023 switch (name) {
1024 case "Prosody":
1025 mServerIdentity = Identity.PROSODY;
1026 break;
1027 case "ejabberd":
1028 mServerIdentity = Identity.EJABBERD;
1029 break;
1030 case "Slack-XMPP":
1031 mServerIdentity = Identity.SLACK;
1032 break;
1033 }
1034 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server name: " + name);
1035 }
1036 }
1037 }
1038 } else if (element.getName().equals("feature")) {
1039 info.features.add(element.getAttribute("var"));
1040 }
1041 }
1042 disco.put(jid, info);
1043 advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
1044 && disco.containsKey(account.getJid().toBareJid());
1045 }
1046 if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
1047 enableAdvancedStreamFeatures();
1048 }
1049 } else {
1050 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
1051 }
1052 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1053 mPendingServiceDiscoveries--;
1054 if (mPendingServiceDiscoveries <= 0) {
1055 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": done with service discovery");
1056 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
1057 changeStatus(Account.State.ONLINE);
1058 if (bindListener != null) {
1059 bindListener.onBind(account);
1060 }
1061 }
1062 }
1063 }
1064 });
1065 synchronized (this.mPendingServiceDiscoveriesIds) {
1066 this.mPendingServiceDiscoveriesIds.add(id);
1067 }
1068 }
1069
1070 private void enableAdvancedStreamFeatures() {
1071 if (getFeatures().carbons() && !features.carbonsEnabled) {
1072 sendEnableCarbons();
1073 }
1074 if (getFeatures().blocking() && !features.blockListRequested) {
1075 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
1076 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1077 }
1078 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1079 listener.onAdvancedStreamFeaturesAvailable(account);
1080 }
1081 }
1082
1083 private void sendServiceDiscoveryItems(final Jid server) {
1084 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1085 iq.setTo(server.toDomainJid());
1086 iq.query("http://jabber.org/protocol/disco#items");
1087 this.sendIqPacket(iq, new OnIqPacketReceived() {
1088
1089 @Override
1090 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1091 if (packet.getType() == IqPacket.TYPE.RESULT) {
1092 final List<Element> elements = packet.query().getChildren();
1093 for (final Element element : elements) {
1094 if (element.getName().equals("item")) {
1095 final Jid jid = element.getAttributeAsJid("jid");
1096 if (jid != null && !jid.equals(account.getServer())) {
1097 sendServiceDiscoveryInfo(jid);
1098 }
1099 }
1100 }
1101 } else {
1102 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
1103 }
1104 }
1105 });
1106 }
1107
1108 private void sendEnableCarbons() {
1109 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1110 iq.addChild("enable", "urn:xmpp:carbons:2");
1111 this.sendIqPacket(iq, new OnIqPacketReceived() {
1112
1113 @Override
1114 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1115 if (!packet.hasChild("error")) {
1116 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1117 + ": successfully enabled carbons");
1118 features.carbonsEnabled = true;
1119 } else {
1120 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1121 + ": error enableing carbons " + packet.toString());
1122 }
1123 }
1124 });
1125 }
1126
1127 private void processStreamError(final Tag currentTag)
1128 throws XmlPullParserException, IOException {
1129 final Element streamError = tagReader.readElement(currentTag);
1130 if (streamError != null && streamError.hasChild("conflict")) {
1131 final String resource = account.getResource().split("\\.")[0];
1132 account.setResource(resource + "." + nextRandomId());
1133 Log.d(Config.LOGTAG,
1134 account.getJid().toBareJid() + ": switching resource due to conflict ("
1135 + account.getResource() + ")");
1136 } else if (streamError != null) {
1137 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
1138 }
1139 }
1140
1141 private void sendStartStream() throws IOException {
1142 final Tag stream = Tag.start("stream:stream");
1143 stream.setAttribute("to", account.getServer().toString());
1144 stream.setAttribute("version", "1.0");
1145 stream.setAttribute("xml:lang", "en");
1146 stream.setAttribute("xmlns", "jabber:client");
1147 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1148 tagWriter.writeTag(stream);
1149 }
1150
1151 private String nextRandomId() {
1152 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
1153 }
1154
1155 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1156 packet.setFrom(account.getJid());
1157 return this.sendUnmodifiedIqPacket(packet, callback);
1158 }
1159
1160 private synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1161 if (packet.getId() == null) {
1162 final String id = nextRandomId();
1163 packet.setAttribute("id", id);
1164 }
1165 if (callback != null) {
1166 synchronized (this.packetCallbacks) {
1167 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1168 }
1169 }
1170 this.sendPacket(packet);
1171 return packet.getId();
1172 }
1173
1174 public void sendMessagePacket(final MessagePacket packet) {
1175 this.sendPacket(packet);
1176 }
1177
1178 public void sendPresencePacket(final PresencePacket packet) {
1179 this.sendPacket(packet);
1180 }
1181
1182 private synchronized void sendPacket(final AbstractStanza packet) {
1183 if (stanzasSent == Integer.MAX_VALUE) {
1184 resetStreamId();
1185 disconnect(true);
1186 return;
1187 }
1188 tagWriter.writeStanzaAsync(packet);
1189 if (packet instanceof AbstractAcknowledgeableStanza) {
1190 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1191 ++stanzasSent;
1192 this.mStanzaQueue.put(stanzasSent, stanza);
1193 if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
1194 if (Config.EXTENDED_SM_LOGGING) {
1195 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1196 }
1197 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1198 }
1199 }
1200 }
1201
1202 public void sendPing() {
1203 if (!r()) {
1204 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1205 iq.setFrom(account.getJid());
1206 iq.addChild("ping", "urn:xmpp:ping");
1207 this.sendIqPacket(iq, null);
1208 }
1209 this.lastPingSent = SystemClock.elapsedRealtime();
1210 }
1211
1212 public void setOnMessagePacketReceivedListener(
1213 final OnMessagePacketReceived listener) {
1214 this.messageListener = listener;
1215 }
1216
1217 public void setOnUnregisteredIqPacketReceivedListener(
1218 final OnIqPacketReceived listener) {
1219 this.unregisteredIqListener = listener;
1220 }
1221
1222 public void setOnPresencePacketReceivedListener(
1223 final OnPresencePacketReceived listener) {
1224 this.presenceListener = listener;
1225 }
1226
1227 public void setOnJinglePacketReceivedListener(
1228 final OnJinglePacketReceived listener) {
1229 this.jingleListener = listener;
1230 }
1231
1232 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1233 this.statusListener = listener;
1234 }
1235
1236 public void setOnBindListener(final OnBindListener listener) {
1237 this.bindListener = listener;
1238 }
1239
1240 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1241 this.acknowledgedListener = listener;
1242 }
1243
1244 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1245 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1246 this.advancedStreamFeaturesLoadedListeners.add(listener);
1247 }
1248 }
1249
1250 public void disconnect(final boolean force) {
1251 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
1252 if (force) {
1253 try {
1254 socket.close();
1255 } catch(Exception e) {
1256 Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": exception during force close ("+e.getMessage()+")");
1257 }
1258 return;
1259 } else {
1260 resetStreamId();
1261 if (tagWriter.isActive()) {
1262 tagWriter.finish();
1263 try {
1264 int i = 0;
1265 boolean warned = false;
1266 while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
1267 if (!warned) {
1268 Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
1269 warned = true;
1270 }
1271 Thread.sleep(200);
1272 i++;
1273 }
1274 if (warned) {
1275 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
1276 }
1277 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
1278 tagWriter.writeTag(Tag.end("stream:stream"));
1279 } catch (final IOException e) {
1280 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
1281 } catch (final InterruptedException e) {
1282 Log.d(Config.LOGTAG, "interrupted");
1283 }
1284 }
1285 }
1286 }
1287
1288 public void resetStreamId() {
1289 this.streamId = null;
1290 }
1291
1292 public List<Jid> findDiscoItemsByFeature(final String feature) {
1293 synchronized (this.disco) {
1294 final List<Jid> items = new ArrayList<>();
1295 for (final Entry<Jid, Info> cursor : this.disco.entrySet()) {
1296 if (cursor.getValue().features.contains(feature)) {
1297 items.add(cursor.getKey());
1298 }
1299 }
1300 return items;
1301 }
1302 }
1303
1304 public Jid findDiscoItemByFeature(final String feature) {
1305 final List<Jid> items = findDiscoItemsByFeature(feature);
1306 if (items.size() >= 1) {
1307 return items.get(0);
1308 }
1309 return null;
1310 }
1311
1312 public boolean r() {
1313 if (getFeatures().sm()) {
1314 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1315 return true;
1316 } else {
1317 return false;
1318 }
1319 }
1320
1321 public String getMucServer() {
1322 synchronized (this.disco) {
1323 for (final Entry<Jid, Info> cursor : disco.entrySet()) {
1324 final Info value = cursor.getValue();
1325 if (value.features.contains("http://jabber.org/protocol/muc")
1326 && !value.features.contains("jabber:iq:gateway")
1327 && !value.identities.contains(new Pair<>("conference", "irc"))) {
1328 return cursor.getKey().toString();
1329 }
1330 }
1331 }
1332 return null;
1333 }
1334
1335 public int getTimeToNextAttempt() {
1336 final int interval = (int) (25 * Math.pow(1.5, attempt));
1337 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1338 return interval - secondsSinceLast;
1339 }
1340
1341 public int getAttempt() {
1342 return this.attempt;
1343 }
1344
1345 public Features getFeatures() {
1346 return this.features;
1347 }
1348
1349 public long getLastSessionEstablished() {
1350 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1351 return System.currentTimeMillis() - diff;
1352 }
1353
1354 public long getLastConnect() {
1355 return this.lastConnect;
1356 }
1357
1358 public long getLastPingSent() {
1359 return this.lastPingSent;
1360 }
1361
1362 public long getLastDiscoStarted() {
1363 return this.lastDiscoStarted;
1364 }
1365 public long getLastPacketReceived() {
1366 return this.lastPacketReceived;
1367 }
1368
1369 public void sendActive() {
1370 this.sendPacket(new ActivePacket());
1371 }
1372
1373 public void sendInactive() {
1374 this.sendPacket(new InactivePacket());
1375 }
1376
1377 public void resetAttemptCount() {
1378 this.attempt = 0;
1379 this.lastConnect = 0;
1380 }
1381
1382 public void setInteractive(boolean interactive) {
1383 this.mInteractive = interactive;
1384 }
1385
1386 public Identity getServerIdentity() {
1387 return mServerIdentity;
1388 }
1389
1390 private class Info {
1391 public final ArrayList<String> features = new ArrayList<>();
1392 public final ArrayList<Pair<String,String>> identities = new ArrayList<>();
1393 }
1394
1395 private class UnauthorizedException extends IOException {
1396
1397 }
1398
1399 private class SecurityException extends IOException {
1400
1401 }
1402
1403 private class IncompatibleServerException extends IOException {
1404
1405 }
1406
1407 public enum Identity {
1408 FACEBOOK,
1409 SLACK,
1410 EJABBERD,
1411 PROSODY,
1412 UNKNOWN
1413 }
1414
1415 public class Features {
1416 XmppConnection connection;
1417 private boolean carbonsEnabled = false;
1418 private boolean encryptionEnabled = false;
1419 private boolean blockListRequested = false;
1420
1421 public Features(final XmppConnection connection) {
1422 this.connection = connection;
1423 }
1424
1425 private boolean hasDiscoFeature(final Jid server, final String feature) {
1426 synchronized (XmppConnection.this.disco) {
1427 return connection.disco.containsKey(server) &&
1428 connection.disco.get(server).features.contains(feature);
1429 }
1430 }
1431
1432 public boolean carbons() {
1433 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1434 }
1435
1436 public boolean blocking() {
1437 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1438 }
1439
1440 public boolean register() {
1441 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1442 }
1443
1444 public boolean sm() {
1445 return streamId != null
1446 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1447 }
1448
1449 public boolean csi() {
1450 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1451 }
1452
1453 public boolean pep() {
1454 synchronized (XmppConnection.this.disco) {
1455 final Pair<String, String> needle = new Pair<>("pubsub", "pep");
1456 Info info = disco.get(account.getServer());
1457 if (info != null && info.identities.contains(needle)) {
1458 return true;
1459 } else {
1460 info = disco.get(account.getJid().toBareJid());
1461 return info != null && info.identities.contains(needle);
1462 }
1463 }
1464 }
1465
1466 public boolean mam() {
1467 if (hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")) {
1468 return true;
1469 } else {
1470 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1471 }
1472 }
1473
1474 public boolean advancedStreamFeaturesLoaded() {
1475 synchronized (XmppConnection.this.disco) {
1476 return disco.containsKey(account.getServer());
1477 }
1478 }
1479
1480 public boolean rosterVersioning() {
1481 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1482 }
1483
1484 public void setBlockListRequested(boolean value) {
1485 this.blockListRequested = value;
1486 }
1487
1488 public boolean httpUpload() {
1489 return !Config.DISABLE_HTTP_UPLOAD && findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD).size() > 0;
1490 }
1491 }
1492
1493 private IqGenerator getIqGenerator() {
1494 return mXmppConnectionService.getIqGenerator();
1495 }
1496}