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