1package eu.siacs.conversations.xmpp;
2
3import android.graphics.Bitmap;
4import android.graphics.BitmapFactory;
5import android.os.Bundle;
6import android.os.Parcelable;
7import android.os.PowerManager;
8import android.os.PowerManager.WakeLock;
9import android.os.SystemClock;
10import android.security.KeyChain;
11import android.util.Base64;
12import android.util.Log;
13import android.util.Pair;
14import android.util.SparseArray;
15
16import org.json.JSONException;
17import org.json.JSONObject;
18import org.xmlpull.v1.XmlPullParserException;
19
20import java.io.ByteArrayInputStream;
21import java.io.IOException;
22import java.io.InputStream;
23import java.math.BigInteger;
24import java.net.ConnectException;
25import java.net.IDN;
26import java.net.InetAddress;
27import java.net.InetSocketAddress;
28import java.net.Socket;
29import java.net.UnknownHostException;
30import java.net.URL;
31import java.security.KeyManagementException;
32import java.security.NoSuchAlgorithmException;
33import java.security.Principal;
34import java.security.PrivateKey;
35import java.security.cert.X509Certificate;
36import java.util.ArrayList;
37import java.util.HashMap;
38import java.util.Hashtable;
39import java.util.Iterator;
40import java.util.List;
41import java.util.Map.Entry;
42import java.util.concurrent.atomic.AtomicBoolean;
43import java.util.concurrent.atomic.AtomicInteger;
44
45import javax.net.ssl.HostnameVerifier;
46import javax.net.ssl.KeyManager;
47import javax.net.ssl.SSLContext;
48import javax.net.ssl.SSLSocket;
49import javax.net.ssl.SSLSocketFactory;
50import javax.net.ssl.X509KeyManager;
51import javax.net.ssl.X509TrustManager;
52
53import de.duenndns.ssl.MemorizingTrustManager;
54import eu.siacs.conversations.Config;
55import eu.siacs.conversations.crypto.XmppDomainVerifier;
56import eu.siacs.conversations.crypto.sasl.DigestMd5;
57import eu.siacs.conversations.crypto.sasl.External;
58import eu.siacs.conversations.crypto.sasl.Plain;
59import eu.siacs.conversations.crypto.sasl.SaslMechanism;
60import eu.siacs.conversations.crypto.sasl.ScramSha1;
61import eu.siacs.conversations.entities.Account;
62import eu.siacs.conversations.entities.Message;
63import eu.siacs.conversations.entities.ServiceDiscoveryResult;
64import eu.siacs.conversations.generator.IqGenerator;
65import eu.siacs.conversations.services.XmppConnectionService;
66import eu.siacs.conversations.utils.DNSHelper;
67import eu.siacs.conversations.utils.SSLSocketHelper;
68import eu.siacs.conversations.utils.SocksSocketFactory;
69import eu.siacs.conversations.utils.Xmlns;
70import eu.siacs.conversations.xml.Element;
71import eu.siacs.conversations.xml.Tag;
72import eu.siacs.conversations.xml.TagWriter;
73import eu.siacs.conversations.xml.XmlReader;
74import eu.siacs.conversations.xmpp.forms.Data;
75import eu.siacs.conversations.xmpp.forms.Field;
76import eu.siacs.conversations.xmpp.jid.InvalidJidException;
77import eu.siacs.conversations.xmpp.jid.Jid;
78import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
79import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
80import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
81import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
82import eu.siacs.conversations.xmpp.stanzas.IqPacket;
83import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
84import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
85import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
86import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
87import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
88import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
89import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
90import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
91
92public class XmppConnection implements Runnable {
93
94 private static final int PACKET_IQ = 0;
95 private static final int PACKET_MESSAGE = 1;
96 private static final int PACKET_PRESENCE = 2;
97 protected Account account;
98 private final WakeLock wakeLock;
99 private Socket socket;
100 private XmlReader tagReader;
101 private TagWriter tagWriter;
102 private final Features features = new Features(this);
103 private boolean needsBinding = true;
104 private boolean shouldAuthenticate = true;
105 private Element streamFeatures;
106 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
107
108 private String streamId = null;
109 private int smVersion = 3;
110 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
111
112 private int stanzasReceived = 0;
113 private int stanzasSent = 0;
114 private long lastPacketReceived = 0;
115 private long lastPingSent = 0;
116 private long lastConnect = 0;
117 private long lastSessionStarted = 0;
118 private long lastDiscoStarted = 0;
119 private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
120 private AtomicBoolean mIsServiceItemsDiscoveryPending = new AtomicBoolean(true);
121 private boolean mWaitForDisco = true;
122 private final ArrayList<String> mPendingServiceDiscoveriesIds = new ArrayList<>();
123 private boolean mInteractive = false;
124 private int attempt = 0;
125 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
126 private OnPresencePacketReceived presenceListener = null;
127 private OnJinglePacketReceived jingleListener = null;
128 private OnIqPacketReceived unregisteredIqListener = null;
129 private OnMessagePacketReceived messageListener = null;
130 private OnStatusChanged statusListener = null;
131 private OnBindListener bindListener = null;
132 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
133 private OnMessageAcknowledged acknowledgedListener = null;
134 private XmppConnectionService mXmppConnectionService = null;
135
136 private SaslMechanism saslMechanism;
137
138 private X509KeyManager mKeyManager = new X509KeyManager() {
139 @Override
140 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
141 return account.getPrivateKeyAlias();
142 }
143
144 @Override
145 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
146 return null;
147 }
148
149 @Override
150 public X509Certificate[] getCertificateChain(String alias) {
151 try {
152 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
153 } catch (Exception e) {
154 return new X509Certificate[0];
155 }
156 }
157
158 @Override
159 public String[] getClientAliases(String s, Principal[] principals) {
160 return new String[0];
161 }
162
163 @Override
164 public String[] getServerAliases(String s, Principal[] principals) {
165 return new String[0];
166 }
167
168 @Override
169 public PrivateKey getPrivateKey(String alias) {
170 try {
171 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
172 } catch (Exception e) {
173 return null;
174 }
175 }
176 };
177 private Identity mServerIdentity = Identity.UNKNOWN;
178
179 private OnIqPacketReceived createPacketReceiveHandler() {
180 return new OnIqPacketReceived() {
181 @Override
182 public void onIqPacketReceived(Account account, IqPacket packet) {
183 if (packet.getType() == IqPacket.TYPE.RESULT) {
184 account.setOption(Account.OPTION_REGISTER,
185 false);
186 forceCloseSocket();
187 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
188 } else if (packet.hasChild("error")
189 && (packet.findChild("error")
190 .hasChild("conflict"))) {
191 forceCloseSocket();
192 changeStatus(Account.State.REGISTRATION_CONFLICT);
193 } else {
194 forceCloseSocket();
195 changeStatus(Account.State.REGISTRATION_FAILED);
196 Log.d(Config.LOGTAG, packet.toString());
197 }
198 }
199 };
200 }
201
202 public XmppConnection(final Account account, final XmppConnectionService service) {
203 this.account = account;
204 this.wakeLock = service.getPowerManager().newWakeLock(
205 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
206 tagWriter = new TagWriter();
207 mXmppConnectionService = service;
208 }
209
210 protected void changeStatus(final Account.State nextStatus) {
211 if (account.getStatus() != nextStatus) {
212 if ((nextStatus == Account.State.OFFLINE)
213 && (account.getStatus() != Account.State.CONNECTING)
214 && (account.getStatus() != Account.State.ONLINE)
215 && (account.getStatus() != Account.State.DISABLED)) {
216 return;
217 }
218 if (nextStatus == Account.State.ONLINE) {
219 this.attempt = 0;
220 }
221 account.setStatus(nextStatus);
222 if (statusListener != null) {
223 statusListener.onStatusChanged(account);
224 }
225 }
226 }
227
228 public void prepareNewConnection() {
229 this.lastConnect = SystemClock.elapsedRealtime();
230 this.lastPingSent = SystemClock.elapsedRealtime();
231 this.lastDiscoStarted = Long.MAX_VALUE;
232 this.changeStatus(Account.State.CONNECTING);
233 }
234
235 protected void connect() {
236 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
237 features.encryptionEnabled = false;
238 this.attempt++;
239 switch (account.getJid().getDomainpart()) {
240 case "chat.facebook.com":
241 mServerIdentity = Identity.FACEBOOK;
242 break;
243 case "nimbuzz.com":
244 mServerIdentity = Identity.NIMBUZZ;
245 break;
246 default:
247 mServerIdentity = Identity.UNKNOWN;
248 break;
249 }
250 try {
251 shouldAuthenticate = needsBinding = !account.isOptionSet(Account.OPTION_REGISTER);
252 tagReader = new XmlReader(wakeLock);
253 tagWriter = new TagWriter();
254 this.changeStatus(Account.State.CONNECTING);
255 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
256 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
257 if (useTor) {
258 String destination;
259 if (account.getHostname() == null || account.getHostname().isEmpty()) {
260 destination = account.getServer().toString();
261 } else {
262 destination = account.getHostname();
263 }
264 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": connect to " + destination + " via TOR");
265 socket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
266 startXmpp();
267 } else if (extended && account.getHostname() != null && !account.getHostname().isEmpty()) {
268 socket = new Socket();
269 try {
270 socket.connect(new InetSocketAddress(account.getHostname(), account.getPort()), Config.SOCKET_TIMEOUT * 1000);
271 } catch (IOException e) {
272 throw new UnknownHostException();
273 }
274 startXmpp();
275 } else if (DNSHelper.isIp(account.getServer().toString())) {
276 socket = new Socket();
277 try {
278 socket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
279 } catch (IOException e) {
280 throw new UnknownHostException();
281 }
282 startXmpp();
283 } else {
284 final Bundle result = DNSHelper.getSRVRecord(account.getServer(), mXmppConnectionService);
285 final ArrayList<Parcelable>values = result.getParcelableArrayList("values");
286 for(Iterator<Parcelable> iterator = values.iterator(); iterator.hasNext();) {
287 final Bundle namePort = (Bundle) iterator.next();
288 try {
289 String srvRecordServer;
290 try {
291 srvRecordServer = IDN.toASCII(namePort.getString("name"));
292 } catch (final IllegalArgumentException e) {
293 // TODO: Handle me?`
294 srvRecordServer = "";
295 }
296 final int srvRecordPort = namePort.getInt("port");
297 final String srvIpServer = namePort.getString("ip");
298 // if tls is true, encryption is implied and must not be started
299 features.encryptionEnabled = namePort.getBoolean("tls");
300 final InetSocketAddress addr;
301 if (srvIpServer != null) {
302 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
303 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
304 + ": using values from dns " + srvRecordServer
305 + "[" + srvIpServer + "]:" + srvRecordPort + " tls: " + features.encryptionEnabled);
306 } else {
307 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
308 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
309 + ": using values from dns "
310 + srvRecordServer + ":" + srvRecordPort + " tls: " + features.encryptionEnabled);
311 }
312
313 if (!features.encryptionEnabled) {
314 socket = new Socket();
315 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
316 } else {
317 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
318 socket = tlsFactoryVerifier.factory.createSocket();
319
320 if (socket == null) {
321 throw new IOException("could not initialize ssl socket");
322 }
323
324 SSLSocketHelper.setSecurity((SSLSocket) socket);
325 SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) socket, account.getServer().getDomainpart());
326 SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) socket, "xmpp-client");
327
328 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
329
330 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) socket).getSession())) {
331 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
332 throw new SecurityException();
333 }
334 }
335
336 if (startXmpp())
337 break; // successfully connected to server that speaks xmpp
338 } catch(final SecurityException e) {
339 throw e;
340 } catch (final Throwable e) {
341 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() +"("+e.getClass().getName()+")");
342 if (!iterator.hasNext()) {
343 throw new UnknownHostException();
344 }
345 }
346 }
347 }
348 processStream();
349 } catch (final IncompatibleServerException e) {
350 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
351 } catch (final SecurityException e) {
352 this.changeStatus(Account.State.SECURITY_ERROR);
353 } catch (final UnauthorizedException e) {
354 this.changeStatus(Account.State.UNAUTHORIZED);
355 } catch (final UnknownHostException | ConnectException e) {
356 this.changeStatus(Account.State.SERVER_NOT_FOUND);
357 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
358 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
359 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
360 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
361 this.changeStatus(Account.State.OFFLINE);
362 this.attempt--; //don't count attempt when reconnecting instantly anyway
363 } finally {
364 forceCloseSocket();
365 if (wakeLock.isHeld()) {
366 try {
367 wakeLock.release();
368 } catch (final RuntimeException ignored) {
369 }
370 }
371 }
372 }
373
374 /**
375 * Starts xmpp protocol, call after connecting to socket
376 * @return true if server returns with valid xmpp, false otherwise
377 * @throws IOException Unknown tag on connect
378 * @throws XmlPullParserException Bad Xml
379 * @throws NoSuchAlgorithmException Other error
380 */
381 private boolean startXmpp() throws IOException, XmlPullParserException, NoSuchAlgorithmException {
382 tagWriter.setOutputStream(socket.getOutputStream());
383 tagReader.setInputStream(socket.getInputStream());
384 tagWriter.beginDocument();
385 sendStartStream();
386 Tag nextTag;
387 while ((nextTag = tagReader.readTag()) != null) {
388 if (nextTag.isStart("stream")) {
389 return true;
390 } else {
391 throw new IOException("unknown tag on connect");
392 }
393 }
394 if (socket.isConnected()) {
395 socket.close();
396 }
397 return false;
398 }
399
400 private static class TlsFactoryVerifier {
401 private final SSLSocketFactory factory;
402 private final HostnameVerifier verifier;
403
404 public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
405 this.factory = factory;
406 this.verifier = verifier;
407 if (factory == null || verifier == null) {
408 throw new IOException("could not setup ssl");
409 }
410 }
411 }
412
413 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
414 final SSLContext sc = SSLSocketHelper.getSSLContext();
415 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
416 KeyManager[] keyManager;
417 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
418 keyManager = new KeyManager[]{mKeyManager};
419 } else {
420 keyManager = null;
421 }
422 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()}, mXmppConnectionService.getRNG());
423 final SSLSocketFactory factory = sc.getSocketFactory();
424 final HostnameVerifier verifier;
425 if (mInteractive) {
426 verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
427 } else {
428 verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
429 }
430
431 return new TlsFactoryVerifier(factory, verifier);
432 }
433
434 @Override
435 public void run() {
436 forceCloseSocket();
437 connect();
438 }
439
440 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
441 Tag nextTag = tagReader.readTag();
442 while (nextTag != null && !nextTag.isEnd("stream")) {
443 if (nextTag.isStart("error")) {
444 processStreamError(nextTag);
445 } else if (nextTag.isStart("features")) {
446 processStreamFeatures(nextTag);
447 } else if (nextTag.isStart("proceed")) {
448 switchOverToTls(nextTag);
449 } else if (nextTag.isStart("success")) {
450 final String challenge = tagReader.readElement(nextTag).getContent();
451 try {
452 saslMechanism.getResponse(challenge);
453 } catch (final SaslMechanism.AuthenticationException e) {
454 disconnect(true);
455 Log.e(Config.LOGTAG, String.valueOf(e));
456 }
457 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
458 account.setKey(Account.PINNED_MECHANISM_KEY,
459 String.valueOf(saslMechanism.getPriority()));
460 tagReader.reset();
461 sendStartStream();
462 final Tag tag = tagReader.readTag();
463 if (tag != null && tag.isStart("stream")) {
464 processStream();
465 } else {
466 throw new IOException("server didn't restart stream after successful auth");
467 }
468 break;
469 } else if (nextTag.isStart("failure")) {
470 throw new UnauthorizedException();
471 } else if (nextTag.isStart("challenge")) {
472 final String challenge = tagReader.readElement(nextTag).getContent();
473 final Element response = new Element("response");
474 response.setAttribute("xmlns",
475 "urn:ietf:params:xml:ns:xmpp-sasl");
476 try {
477 response.setContent(saslMechanism.getResponse(challenge));
478 } catch (final SaslMechanism.AuthenticationException e) {
479 // TODO: Send auth abort tag.
480 Log.e(Config.LOGTAG, e.toString());
481 }
482 tagWriter.writeElement(response);
483 } else if (nextTag.isStart("enabled")) {
484 final Element enabled = tagReader.readElement(nextTag);
485 if ("true".equals(enabled.getAttribute("resume"))) {
486 this.streamId = enabled.getAttribute("id");
487 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
488 + ": stream management(" + smVersion
489 + ") enabled (resumable)");
490 } else {
491 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
492 + ": stream management(" + smVersion + ") enabled");
493 }
494 this.stanzasReceived = 0;
495 final RequestPacket r = new RequestPacket(smVersion);
496 tagWriter.writeStanzaAsync(r);
497 } else if (nextTag.isStart("resumed")) {
498 lastPacketReceived = SystemClock.elapsedRealtime();
499 final Element resumed = tagReader.readElement(nextTag);
500 final String h = resumed.getAttribute("h");
501 try {
502 final int serverCount = Integer.parseInt(h);
503 if (serverCount != stanzasSent) {
504 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
505 + ": session resumed with lost packages");
506 stanzasSent = serverCount;
507 } else {
508 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
509 }
510 acknowledgeStanzaUpTo(serverCount);
511 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
512 for(int i = 0; i < this.mStanzaQueue.size(); ++i) {
513 failedStanzas.add(mStanzaQueue.valueAt(i));
514 }
515 mStanzaQueue.clear();
516 Log.d(Config.LOGTAG,"resending "+failedStanzas.size()+" stanzas");
517 for(AbstractAcknowledgeableStanza packet : failedStanzas) {
518 if (packet instanceof MessagePacket) {
519 MessagePacket message = (MessagePacket) packet;
520 mXmppConnectionService.markMessage(account,
521 message.getTo().toBareJid(),
522 message.getId(),
523 Message.STATUS_UNSEND);
524 }
525 sendPacket(packet);
526 }
527 } catch (final NumberFormatException ignored) {
528 }
529 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
530 changeStatus(Account.State.ONLINE);
531 } else if (nextTag.isStart("r")) {
532 tagReader.readElement(nextTag);
533 if (Config.EXTENDED_SM_LOGGING) {
534 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
535 }
536 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
537 tagWriter.writeStanzaAsync(ack);
538 } else if (nextTag.isStart("a")) {
539 final Element ack = tagReader.readElement(nextTag);
540 lastPacketReceived = SystemClock.elapsedRealtime();
541 try {
542 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
543 acknowledgeStanzaUpTo(serverSequence);
544 } catch (NumberFormatException e) {
545 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
546 }
547 } else if (nextTag.isStart("failed")) {
548 tagReader.readElement(nextTag);
549 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
550 resetStreamId();
551 if (account.getStatus() != Account.State.ONLINE) {
552 sendBindRequest();
553 }
554 } else if (nextTag.isStart("iq")) {
555 processIq(nextTag);
556 } else if (nextTag.isStart("message")) {
557 processMessage(nextTag);
558 } else if (nextTag.isStart("presence")) {
559 processPresence(nextTag);
560 }
561 nextTag = tagReader.readTag();
562 }
563 }
564
565 private void acknowledgeStanzaUpTo(int serverCount) {
566 for (int i = 0; i < mStanzaQueue.size(); ++i) {
567 if (serverCount >= mStanzaQueue.keyAt(i)) {
568 if (Config.EXTENDED_SM_LOGGING) {
569 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
570 }
571 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
572 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
573 MessagePacket packet = (MessagePacket) stanza;
574 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
575 }
576 mStanzaQueue.removeAt(i);
577 i--;
578 }
579 }
580 }
581
582 private Element processPacket(final Tag currentTag, final int packetType)
583 throws XmlPullParserException, IOException {
584 Element element;
585 switch (packetType) {
586 case PACKET_IQ:
587 element = new IqPacket();
588 break;
589 case PACKET_MESSAGE:
590 element = new MessagePacket();
591 break;
592 case PACKET_PRESENCE:
593 element = new PresencePacket();
594 break;
595 default:
596 return null;
597 }
598 element.setAttributes(currentTag.getAttributes());
599 Tag nextTag = tagReader.readTag();
600 if (nextTag == null) {
601 throw new IOException("interrupted mid tag");
602 }
603 while (!nextTag.isEnd(element.getName())) {
604 if (!nextTag.isNo()) {
605 final Element child = tagReader.readElement(nextTag);
606 final String type = currentTag.getAttribute("type");
607 if (packetType == PACKET_IQ
608 && "jingle".equals(child.getName())
609 && ("set".equalsIgnoreCase(type) || "get"
610 .equalsIgnoreCase(type))) {
611 element = new JinglePacket();
612 element.setAttributes(currentTag.getAttributes());
613 }
614 element.addChild(child);
615 }
616 nextTag = tagReader.readTag();
617 if (nextTag == null) {
618 throw new IOException("interrupted mid tag");
619 }
620 }
621 if (stanzasReceived == Integer.MAX_VALUE) {
622 resetStreamId();
623 throw new IOException("time to restart the session. cant handle >2 billion pcks");
624 }
625 ++stanzasReceived;
626 lastPacketReceived = SystemClock.elapsedRealtime();
627 return element;
628 }
629
630 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
631 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
632
633 if (packet.getId() == null) {
634 return; // an iq packet without id is definitely invalid
635 }
636
637 if (packet instanceof JinglePacket) {
638 if (this.jingleListener != null) {
639 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
640 }
641 } else {
642 OnIqPacketReceived callback = null;
643 synchronized (this.packetCallbacks) {
644 if (packetCallbacks.containsKey(packet.getId())) {
645 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
646 // Packets to the server should have responses from the server
647 if (packetCallbackDuple.first.toServer(account)) {
648 if (packet.fromServer(account) || mServerIdentity == Identity.FACEBOOK) {
649 callback = packetCallbackDuple.second;
650 packetCallbacks.remove(packet.getId());
651 } else {
652 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
653 }
654 } else {
655 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
656 callback = packetCallbackDuple.second;
657 packetCallbacks.remove(packet.getId());
658 } else {
659 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
660 }
661 }
662 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
663 callback = this.unregisteredIqListener;
664 }
665 }
666 if (callback != null) {
667 callback.onIqPacketReceived(account,packet);
668 }
669 }
670 }
671
672 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
673 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
674 this.messageListener.onMessagePacketReceived(account, packet);
675 }
676
677 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
678 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
679 this.presenceListener.onPresencePacketReceived(account, packet);
680 }
681
682 private void sendStartTLS() throws IOException {
683 final Tag startTLS = Tag.empty("starttls");
684 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
685 tagWriter.writeTag(startTLS);
686 }
687
688
689
690 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
691 tagReader.readTag();
692 try {
693 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
694 final InetAddress address = socket == null ? null : socket.getInetAddress();
695
696 if (address == null) {
697 throw new IOException("could not setup ssl");
698 }
699
700 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
701
702 if (sslSocket == null) {
703 throw new IOException("could not initialize ssl socket");
704 }
705
706 SSLSocketHelper.setSecurity(sslSocket);
707
708 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
709 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
710 throw new SecurityException();
711 }
712 tagReader.setInputStream(sslSocket.getInputStream());
713 tagWriter.setOutputStream(sslSocket.getOutputStream());
714 sendStartStream();
715 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
716 features.encryptionEnabled = true;
717 final Tag tag = tagReader.readTag();
718 if (tag != null && tag.isStart("stream")) {
719 processStream();
720 } else {
721 throw new IOException("server didn't restart stream after STARTTLS");
722 }
723 sslSocket.close();
724 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
725 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
726 throw new SecurityException();
727 }
728 }
729
730 private void processStreamFeatures(final Tag currentTag)
731 throws XmlPullParserException, IOException {
732 this.streamFeatures = tagReader.readElement(currentTag);
733 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
734 sendStartTLS();
735 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
736 if (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS) {
737 sendRegistryRequest();
738 } else {
739 throw new IncompatibleServerException();
740 }
741 } else if (!this.streamFeatures.hasChild("register")
742 && account.isOptionSet(Account.OPTION_REGISTER)) {
743 forceCloseSocket();
744 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
745 } else if (this.streamFeatures.hasChild("mechanisms")
746 && shouldAuthenticate
747 && (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS)) {
748 authenticate();
749 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
750 if (Config.EXTENDED_SM_LOGGING) {
751 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
752 }
753 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
754 this.tagWriter.writeStanzaAsync(resume);
755 } else if (needsBinding) {
756 if (this.streamFeatures.hasChild("bind")) {
757 sendBindRequest();
758 } else {
759 throw new IncompatibleServerException();
760 }
761 }
762 }
763
764 private void authenticate() throws IOException {
765 final List<String> mechanisms = extractMechanisms(streamFeatures
766 .findChild("mechanisms"));
767 final Element auth = new Element("auth");
768 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
769 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
770 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
771 } else if (mechanisms.contains("SCRAM-SHA-1")) {
772 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
773 } else if (mechanisms.contains("PLAIN")) {
774 saslMechanism = new Plain(tagWriter, account);
775 } else if (mechanisms.contains("DIGEST-MD5")) {
776 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
777 }
778 if (saslMechanism != null) {
779 final JSONObject keys = account.getKeys();
780 try {
781 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
782 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) {
783 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
784 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
785 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
786 "). Possible downgrade attack?");
787 throw new SecurityException();
788 }
789 } catch (final JSONException e) {
790 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
791 }
792 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
793 auth.setAttribute("mechanism", saslMechanism.getMechanism());
794 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
795 auth.setContent(saslMechanism.getClientFirstMessage());
796 }
797 tagWriter.writeElement(auth);
798 } else {
799 throw new IncompatibleServerException();
800 }
801 }
802
803 private List<String> extractMechanisms(final Element stream) {
804 final ArrayList<String> mechanisms = new ArrayList<>(stream
805 .getChildren().size());
806 for (final Element child : stream.getChildren()) {
807 mechanisms.add(child.getContent());
808 }
809 return mechanisms;
810 }
811
812 public void sendCaptchaRegistryRequest(String id, Data data) {
813 if (data == null) {
814 setAccountCreationFailed("");
815 } else {
816 IqPacket request = getIqGenerator().generateCreateAccountWithCaptcha(account, id, data);
817 sendIqPacket(request, createPacketReceiveHandler());
818 }
819 }
820
821 private void sendRegistryRequest() {
822 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
823 register.query("jabber:iq:register");
824 register.setTo(account.getServer());
825 sendIqPacket(register, new OnIqPacketReceived() {
826
827 @Override
828 public void onIqPacketReceived(final Account account, final IqPacket packet) {
829 boolean failed = false;
830 if (packet.getType() == IqPacket.TYPE.RESULT
831 && packet.query().hasChild("username")
832 && (packet.query().hasChild("password"))) {
833 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
834 final Element username = new Element("username").setContent(account.getUsername());
835 final Element password = new Element("password").setContent(account.getPassword());
836 register.query("jabber:iq:register").addChild(username);
837 register.query().addChild(password);
838 sendIqPacket(register, createPacketReceiveHandler());
839 } else if (packet.getType() == IqPacket.TYPE.RESULT
840 && (packet.query().hasChild("x", "jabber:x:data"))) {
841 final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
842 final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
843 final String id = packet.getId();
844
845 Bitmap captcha = null;
846 if (blob != null) {
847 try {
848 final String base64Blob = blob.getContent();
849 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
850 InputStream stream = new ByteArrayInputStream(strBlob);
851 captcha = BitmapFactory.decodeStream(stream);
852 } catch (Exception e) {
853 //ignored
854 }
855 } else {
856 try {
857 Field url = data.getFieldByName("url");
858 String urlString = url.findChildContent("value");
859 URL uri = new URL(urlString);
860 captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
861 } catch (IOException e) {
862 Log.e(Config.LOGTAG, e.toString());
863 }
864 }
865
866 if (captcha != null) {
867 failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
868 }
869 } else {
870 failed = true;
871 }
872
873 if (failed) {
874 final Element instructions = packet.query().findChild("instructions");
875 setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
876 }
877 }
878 });
879 }
880
881 private void setAccountCreationFailed(String instructions) {
882 changeStatus(Account.State.REGISTRATION_FAILED);
883 disconnect(true);
884 Log.d(Config.LOGTAG, account.getJid().toBareJid()
885 + ": could not register. instructions are"
886 + instructions);
887 }
888
889 public void resetEverything() {
890 resetStreamId();
891 clearIqCallbacks();
892 mStanzaQueue.clear();
893 synchronized (this.disco) {
894 disco.clear();
895 }
896 }
897
898 private void sendBindRequest() {
899 while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
900 try {
901 Thread.sleep(500);
902 } catch (final InterruptedException ignored) {
903 }
904 }
905 needsBinding = false;
906 clearIqCallbacks();
907 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
908 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
909 .addChild("resource").setContent(account.getResource());
910 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
911 @Override
912 public void onIqPacketReceived(final Account account, final IqPacket packet) {
913 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
914 return;
915 }
916 final Element bind = packet.findChild("bind");
917 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
918 final Element jid = bind.findChild("jid");
919 if (jid != null && jid.getContent() != null) {
920 try {
921 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
922 } catch (final InvalidJidException e) {
923 // TODO: Handle the case where an external JID is technically invalid?
924 }
925 if (streamFeatures.hasChild("session")) {
926 sendStartSession();
927 } else {
928 sendPostBindInitialization();
929 }
930 } else {
931 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
932 disconnect(true);
933 }
934 } else {
935 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
936 disconnect(true);
937 }
938 }
939 });
940 }
941
942 private void clearIqCallbacks() {
943 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
944 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
945 synchronized (this.packetCallbacks) {
946 if (this.packetCallbacks.size() == 0) {
947 return;
948 }
949 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
950 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
951 while (iterator.hasNext()) {
952 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
953 callbacks.add(entry.second);
954 iterator.remove();
955 }
956 }
957 for(OnIqPacketReceived callback : callbacks) {
958 callback.onIqPacketReceived(account,failurePacket);
959 }
960 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
961 }
962
963 public void sendDiscoTimeout() {
964 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.ERROR); //don't use timeout
965 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
966 synchronized (this.mPendingServiceDiscoveriesIds) {
967 for(String id : mPendingServiceDiscoveriesIds) {
968 synchronized (this.packetCallbacks) {
969 Pair<IqPacket, OnIqPacketReceived> pair = this.packetCallbacks.remove(id);
970 if (pair != null) {
971 callbacks.add(pair.second);
972 }
973 }
974 }
975 this.mPendingServiceDiscoveriesIds.clear();
976 }
977 if (callbacks.size() > 0) {
978 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending disco timeout");
979 resetStreamId(); //we don't want to live with this for ever
980 }
981 for(OnIqPacketReceived callback : callbacks) {
982 callback.onIqPacketReceived(account,failurePacket);
983 }
984 }
985
986 private void sendStartSession() {
987 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
988 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
989 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
990 @Override
991 public void onIqPacketReceived(Account account, IqPacket packet) {
992 if (packet.getType() == IqPacket.TYPE.RESULT) {
993 sendPostBindInitialization();
994 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
995 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
996 disconnect(true);
997 }
998 }
999 });
1000 }
1001
1002 private void sendPostBindInitialization() {
1003 smVersion = 0;
1004 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1005 smVersion = 3;
1006 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1007 smVersion = 2;
1008 }
1009 if (smVersion != 0) {
1010 final EnablePacket enable = new EnablePacket(smVersion);
1011 tagWriter.writeStanzaAsync(enable);
1012 stanzasSent = 0;
1013 mStanzaQueue.clear();
1014 }
1015 features.carbonsEnabled = false;
1016 features.blockListRequested = false;
1017 synchronized (this.disco) {
1018 this.disco.clear();
1019 }
1020 mPendingServiceDiscoveries.set(0);
1021 mIsServiceItemsDiscoveryPending.set(true);
1022 mWaitForDisco = mServerIdentity != Identity.NIMBUZZ;
1023 lastDiscoStarted = SystemClock.elapsedRealtime();
1024 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
1025 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1026 Element caps = streamFeatures.findChild("c");
1027 final String hash = caps == null ? null : caps.getAttribute("hash");
1028 final String ver = caps == null ? null : caps.getAttribute("ver");
1029 ServiceDiscoveryResult discoveryResult = null;
1030 if (hash != null && ver != null) {
1031 discoveryResult = mXmppConnectionService.databaseBackend.findDiscoveryResult(hash, ver);
1032 }
1033 if (discoveryResult == null) {
1034 sendServiceDiscoveryInfo(account.getServer());
1035 } else {
1036 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server caps came from cache");
1037 disco.put(account.getServer(), discoveryResult);
1038 }
1039 sendServiceDiscoveryInfo(account.getJid().toBareJid());
1040 sendServiceDiscoveryItems(account.getServer());
1041 if (!mWaitForDisco) {
1042 finalizeBind();
1043 }
1044 this.lastSessionStarted = SystemClock.elapsedRealtime();
1045 }
1046
1047 private void sendServiceDiscoveryInfo(final Jid jid) {
1048 mPendingServiceDiscoveries.incrementAndGet();
1049 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1050 iq.setTo(jid);
1051 iq.query("http://jabber.org/protocol/disco#info");
1052 String id = this.sendIqPacket(iq, new OnIqPacketReceived() {
1053
1054 @Override
1055 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1056 if (packet.getType() == IqPacket.TYPE.RESULT) {
1057 boolean advancedStreamFeaturesLoaded;
1058 synchronized (XmppConnection.this.disco) {
1059 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1060 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1061 if (mServerIdentity == Identity.UNKNOWN && id.getType().equals("im") &&
1062 id.getCategory().equals("server") && id.getName() != null &&
1063 jid.equals(account.getServer())) {
1064 switch (id.getName()) {
1065 case "Prosody":
1066 mServerIdentity = Identity.PROSODY;
1067 break;
1068 case "ejabberd":
1069 mServerIdentity = Identity.EJABBERD;
1070 break;
1071 case "Slack-XMPP":
1072 mServerIdentity = Identity.SLACK;
1073 break;
1074 }
1075 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server name: " + id.getName());
1076 }
1077 }
1078 if (jid.equals(account.getServer())) {
1079 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1080 }
1081 disco.put(jid, result);
1082 advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
1083 && disco.containsKey(account.getJid().toBareJid());
1084 }
1085 if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
1086 enableAdvancedStreamFeatures();
1087 }
1088 } else {
1089 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
1090 }
1091 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1092 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1093 && !mIsServiceItemsDiscoveryPending.get()
1094 && mWaitForDisco) {
1095 finalizeBind();
1096 }
1097 }
1098 }
1099 });
1100 synchronized (this.mPendingServiceDiscoveriesIds) {
1101 this.mPendingServiceDiscoveriesIds.add(id);
1102 }
1103 }
1104
1105 private void finalizeBind() {
1106 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
1107 if (bindListener != null) {
1108 bindListener.onBind(account);
1109 }
1110 changeStatus(Account.State.ONLINE);
1111 }
1112
1113 private void enableAdvancedStreamFeatures() {
1114 if (getFeatures().carbons() && !features.carbonsEnabled) {
1115 sendEnableCarbons();
1116 }
1117 if (getFeatures().blocking() && !features.blockListRequested) {
1118 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
1119 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1120 }
1121 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1122 listener.onAdvancedStreamFeaturesAvailable(account);
1123 }
1124 }
1125
1126 private void sendServiceDiscoveryItems(final Jid server) {
1127 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1128 iq.setTo(server.toDomainJid());
1129 iq.query("http://jabber.org/protocol/disco#items");
1130 String id = this.sendIqPacket(iq, new OnIqPacketReceived() {
1131
1132 @Override
1133 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1134 if (packet.getType() == IqPacket.TYPE.RESULT) {
1135 final List<Element> elements = packet.query().getChildren();
1136 for (final Element element : elements) {
1137 if (element.getName().equals("item")) {
1138 final Jid jid = element.getAttributeAsJid("jid");
1139 if (jid != null && !jid.equals(account.getServer())) {
1140 sendServiceDiscoveryInfo(jid);
1141 }
1142 }
1143 }
1144 } else {
1145 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
1146 }
1147 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1148 mIsServiceItemsDiscoveryPending.set(false);
1149 if (mPendingServiceDiscoveries.get() == 0 && mWaitForDisco) {
1150 finalizeBind();
1151 }
1152 }
1153 }
1154 });
1155 synchronized (this.mPendingServiceDiscoveriesIds) {
1156 this.mPendingServiceDiscoveriesIds.add(id);
1157 }
1158 }
1159
1160 private void sendEnableCarbons() {
1161 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1162 iq.addChild("enable", "urn:xmpp:carbons:2");
1163 this.sendIqPacket(iq, new OnIqPacketReceived() {
1164
1165 @Override
1166 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1167 if (!packet.hasChild("error")) {
1168 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1169 + ": successfully enabled carbons");
1170 features.carbonsEnabled = true;
1171 } else {
1172 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1173 + ": error enableing carbons " + packet.toString());
1174 }
1175 }
1176 });
1177 }
1178
1179 private void processStreamError(final Tag currentTag)
1180 throws XmlPullParserException, IOException {
1181 final Element streamError = tagReader.readElement(currentTag);
1182 if (streamError != null && streamError.hasChild("conflict")) {
1183 final String resource = account.getResource().split("\\.")[0];
1184 account.setResource(resource + "." + nextRandomId());
1185 Log.d(Config.LOGTAG,
1186 account.getJid().toBareJid() + ": switching resource due to conflict ("
1187 + account.getResource() + ")");
1188 } else if (streamError != null) {
1189 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
1190 }
1191 }
1192
1193 private void sendStartStream() throws IOException {
1194 final Tag stream = Tag.start("stream:stream");
1195 stream.setAttribute("to", account.getServer().toString());
1196 stream.setAttribute("version", "1.0");
1197 stream.setAttribute("xml:lang", "en");
1198 stream.setAttribute("xmlns", "jabber:client");
1199 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1200 tagWriter.writeTag(stream);
1201 }
1202
1203 private String nextRandomId() {
1204 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
1205 }
1206
1207 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1208 packet.setFrom(account.getJid());
1209 return this.sendUnmodifiedIqPacket(packet, callback);
1210 }
1211
1212 private synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1213 if (packet.getId() == null) {
1214 final String id = nextRandomId();
1215 packet.setAttribute("id", id);
1216 }
1217 if (callback != null) {
1218 synchronized (this.packetCallbacks) {
1219 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1220 }
1221 }
1222 this.sendPacket(packet);
1223 return packet.getId();
1224 }
1225
1226 public void sendMessagePacket(final MessagePacket packet) {
1227 this.sendPacket(packet);
1228 }
1229
1230 public void sendPresencePacket(final PresencePacket packet) {
1231 this.sendPacket(packet);
1232 }
1233
1234 private synchronized void sendPacket(final AbstractStanza packet) {
1235 if (stanzasSent == Integer.MAX_VALUE) {
1236 resetStreamId();
1237 disconnect(true);
1238 return;
1239 }
1240 tagWriter.writeStanzaAsync(packet);
1241 if (packet instanceof AbstractAcknowledgeableStanza) {
1242 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1243 ++stanzasSent;
1244 this.mStanzaQueue.put(stanzasSent, stanza);
1245 if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
1246 if (Config.EXTENDED_SM_LOGGING) {
1247 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1248 }
1249 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1250 }
1251 }
1252 }
1253
1254 public void sendPing() {
1255 if (!r()) {
1256 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1257 iq.setFrom(account.getJid());
1258 iq.addChild("ping", "urn:xmpp:ping");
1259 this.sendIqPacket(iq, null);
1260 }
1261 this.lastPingSent = SystemClock.elapsedRealtime();
1262 }
1263
1264 public void setOnMessagePacketReceivedListener(
1265 final OnMessagePacketReceived listener) {
1266 this.messageListener = listener;
1267 }
1268
1269 public void setOnUnregisteredIqPacketReceivedListener(
1270 final OnIqPacketReceived listener) {
1271 this.unregisteredIqListener = listener;
1272 }
1273
1274 public void setOnPresencePacketReceivedListener(
1275 final OnPresencePacketReceived listener) {
1276 this.presenceListener = listener;
1277 }
1278
1279 public void setOnJinglePacketReceivedListener(
1280 final OnJinglePacketReceived listener) {
1281 this.jingleListener = listener;
1282 }
1283
1284 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1285 this.statusListener = listener;
1286 }
1287
1288 public void setOnBindListener(final OnBindListener listener) {
1289 this.bindListener = listener;
1290 }
1291
1292 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1293 this.acknowledgedListener = listener;
1294 }
1295
1296 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1297 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1298 this.advancedStreamFeaturesLoadedListeners.add(listener);
1299 }
1300 }
1301
1302 public void waitForPush() {
1303 if (tagWriter.isActive()) {
1304 tagWriter.finish();
1305 new Thread(new Runnable() {
1306 @Override
1307 public void run() {
1308 try {
1309 while(!tagWriter.finished()) {
1310 Thread.sleep(10);
1311 }
1312 socket.close();
1313 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closed tcp without closing stream");
1314 } catch (IOException e) {
1315 e.printStackTrace();
1316 } catch (InterruptedException e) {
1317 e.printStackTrace();
1318 }
1319 }
1320 }).start();
1321 } else {
1322 forceCloseSocket();
1323 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": closed tcp without closing stream (no waiting)");
1324 }
1325 }
1326
1327 private void forceCloseSocket() {
1328 if (socket != null) {
1329 try {
1330 socket.close();
1331 } catch (IOException e) {
1332 e.printStackTrace();
1333 }
1334 }
1335 }
1336
1337 public void disconnect(final boolean force) {
1338 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
1339 if (force) {
1340 forceCloseSocket();
1341 return;
1342 } else {
1343 if (tagWriter.isActive()) {
1344 tagWriter.finish();
1345 try {
1346 int i = 0;
1347 boolean warned = false;
1348 while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
1349 if (!warned) {
1350 Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
1351 warned = true;
1352 }
1353 Thread.sleep(200);
1354 i++;
1355 }
1356 if (warned) {
1357 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
1358 }
1359 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
1360 tagWriter.writeTag(Tag.end("stream:stream"));
1361 } catch (final IOException e) {
1362 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
1363 } catch (final InterruptedException e) {
1364 Log.d(Config.LOGTAG, "interrupted");
1365 }
1366 }
1367 }
1368 }
1369
1370 public void resetStreamId() {
1371 this.streamId = null;
1372 }
1373
1374 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1375 synchronized (this.disco) {
1376 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1377 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1378 if (cursor.getValue().getFeatures().contains(feature)) {
1379 items.add(cursor);
1380 }
1381 }
1382 return items;
1383 }
1384 }
1385
1386 public Jid findDiscoItemByFeature(final String feature) {
1387 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1388 if (items.size() >= 1) {
1389 return items.get(0).getKey();
1390 }
1391 return null;
1392 }
1393
1394 public boolean r() {
1395 if (getFeatures().sm()) {
1396 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1397 return true;
1398 } else {
1399 return false;
1400 }
1401 }
1402
1403 public String getMucServer() {
1404 synchronized (this.disco) {
1405 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1406 final ServiceDiscoveryResult value = cursor.getValue();
1407 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1408 && !value.getFeatures().contains("jabber:iq:gateway")
1409 && !value.hasIdentity("conference", "irc")) {
1410 return cursor.getKey().toString();
1411 }
1412 }
1413 }
1414 return null;
1415 }
1416
1417 public int getTimeToNextAttempt() {
1418 final int interval = (int) (25 * Math.pow(1.5, attempt));
1419 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1420 return interval - secondsSinceLast;
1421 }
1422
1423 public int getAttempt() {
1424 return this.attempt;
1425 }
1426
1427 public Features getFeatures() {
1428 return this.features;
1429 }
1430
1431 public long getLastSessionEstablished() {
1432 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1433 return System.currentTimeMillis() - diff;
1434 }
1435
1436 public long getLastConnect() {
1437 return this.lastConnect;
1438 }
1439
1440 public long getLastPingSent() {
1441 return this.lastPingSent;
1442 }
1443
1444 public long getLastDiscoStarted() {
1445 return this.lastDiscoStarted;
1446 }
1447 public long getLastPacketReceived() {
1448 return this.lastPacketReceived;
1449 }
1450
1451 public void sendActive() {
1452 this.sendPacket(new ActivePacket());
1453 }
1454
1455 public void sendInactive() {
1456 this.sendPacket(new InactivePacket());
1457 }
1458
1459 public void resetAttemptCount() {
1460 this.attempt = 0;
1461 this.lastConnect = 0;
1462 }
1463
1464 public void setInteractive(boolean interactive) {
1465 this.mInteractive = interactive;
1466 }
1467
1468 public Identity getServerIdentity() {
1469 return mServerIdentity;
1470 }
1471
1472 private class UnauthorizedException extends IOException {
1473
1474 }
1475
1476 private class SecurityException extends IOException {
1477
1478 }
1479
1480 private class IncompatibleServerException extends IOException {
1481
1482 }
1483
1484 public enum Identity {
1485 FACEBOOK,
1486 SLACK,
1487 EJABBERD,
1488 PROSODY,
1489 NIMBUZZ,
1490 UNKNOWN
1491 }
1492
1493 public class Features {
1494 XmppConnection connection;
1495 private boolean carbonsEnabled = false;
1496 private boolean encryptionEnabled = false;
1497 private boolean blockListRequested = false;
1498
1499 public Features(final XmppConnection connection) {
1500 this.connection = connection;
1501 }
1502
1503 private boolean hasDiscoFeature(final Jid server, final String feature) {
1504 synchronized (XmppConnection.this.disco) {
1505 return connection.disco.containsKey(server) &&
1506 connection.disco.get(server).getFeatures().contains(feature);
1507 }
1508 }
1509
1510 public boolean carbons() {
1511 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1512 }
1513
1514 public boolean blocking() {
1515 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1516 }
1517
1518 public boolean register() {
1519 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1520 }
1521
1522 public boolean sm() {
1523 return streamId != null
1524 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1525 }
1526
1527 public boolean csi() {
1528 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1529 }
1530
1531 public boolean pep() {
1532 synchronized (XmppConnection.this.disco) {
1533 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1534 return info != null && info.hasIdentity("pubsub", "pep");
1535 }
1536 }
1537
1538 public boolean pepPersistent() {
1539 synchronized (XmppConnection.this.disco) {
1540 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1541 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1542 }
1543 }
1544
1545 public boolean mam() {
1546 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")
1547 || hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1548 }
1549
1550 public boolean push() {
1551 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:push:0")
1552 || hasDiscoFeature(account.getServer(), "urn:xmpp:push:0");
1553 }
1554
1555 public boolean rosterVersioning() {
1556 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1557 }
1558
1559 public void setBlockListRequested(boolean value) {
1560 this.blockListRequested = value;
1561 }
1562
1563 public boolean httpUpload(long filesize) {
1564 if (Config.DISABLE_HTTP_UPLOAD) {
1565 return false;
1566 } else {
1567 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1568 if (items.size() > 0) {
1569 try {
1570 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1571 return filesize <= maxsize;
1572 } catch (Exception e) {
1573 return true;
1574 }
1575 } else {
1576 return false;
1577 }
1578 }
1579 }
1580
1581 public long getMaxHttpUploadSize() {
1582 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1583 if (items.size() > 0) {
1584 try {
1585 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1586 } catch (Exception e) {
1587 return -1;
1588 }
1589 } else {
1590 return -1;
1591 }
1592 }
1593 }
1594
1595 private IqGenerator getIqGenerator() {
1596 return mXmppConnectionService.getIqGenerator();
1597 }
1598}