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.Arrays;
38import java.util.HashMap;
39import java.util.Hashtable;
40import java.util.Iterator;
41import java.util.List;
42import java.util.Map.Entry;
43import java.util.concurrent.atomic.AtomicBoolean;
44import java.util.concurrent.atomic.AtomicInteger;
45
46import javax.net.ssl.HostnameVerifier;
47import javax.net.ssl.KeyManager;
48import javax.net.ssl.SSLContext;
49import javax.net.ssl.SSLSession;
50import javax.net.ssl.SSLSocket;
51import javax.net.ssl.SSLSocketFactory;
52import javax.net.ssl.X509KeyManager;
53import javax.net.ssl.X509TrustManager;
54
55import de.duenndns.ssl.MemorizingTrustManager;
56import eu.siacs.conversations.Config;
57import eu.siacs.conversations.crypto.XmppDomainVerifier;
58import eu.siacs.conversations.crypto.sasl.Anonymous;
59import eu.siacs.conversations.crypto.sasl.DigestMd5;
60import eu.siacs.conversations.crypto.sasl.External;
61import eu.siacs.conversations.crypto.sasl.Plain;
62import eu.siacs.conversations.crypto.sasl.SaslMechanism;
63import eu.siacs.conversations.crypto.sasl.ScramSha1;
64import eu.siacs.conversations.entities.Account;
65import eu.siacs.conversations.entities.Message;
66import eu.siacs.conversations.entities.ServiceDiscoveryResult;
67import eu.siacs.conversations.generator.IqGenerator;
68import eu.siacs.conversations.services.XmppConnectionService;
69import eu.siacs.conversations.utils.DNSHelper;
70import eu.siacs.conversations.utils.SSLSocketHelper;
71import eu.siacs.conversations.utils.SocksSocketFactory;
72import eu.siacs.conversations.utils.Xmlns;
73import eu.siacs.conversations.xml.Element;
74import eu.siacs.conversations.xml.Tag;
75import eu.siacs.conversations.xml.TagWriter;
76import eu.siacs.conversations.xml.XmlReader;
77import eu.siacs.conversations.xmpp.forms.Data;
78import eu.siacs.conversations.xmpp.forms.Field;
79import eu.siacs.conversations.xmpp.jid.InvalidJidException;
80import eu.siacs.conversations.xmpp.jid.Jid;
81import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
82import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
83import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
84import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
85import eu.siacs.conversations.xmpp.stanzas.IqPacket;
86import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
87import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
88import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
89import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
90import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
91import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
92import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
93import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
94
95public class XmppConnection implements Runnable {
96
97 private static final int PACKET_IQ = 0;
98 private static final int PACKET_MESSAGE = 1;
99 private static final int PACKET_PRESENCE = 2;
100 protected Account account;
101 private final WakeLock wakeLock;
102 private Socket socket;
103 private XmlReader tagReader;
104 private TagWriter tagWriter;
105 private final Features features = new Features(this);
106 private boolean needsBinding = true;
107 private boolean shouldAuthenticate = true;
108 private Element streamFeatures;
109 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
110
111 private String streamId = null;
112 private int smVersion = 3;
113 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
114
115 private int stanzasReceived = 0;
116 private int stanzasSent = 0;
117 private long lastPacketReceived = 0;
118 private long lastPingSent = 0;
119 private long lastConnect = 0;
120 private long lastSessionStarted = 0;
121 private long lastDiscoStarted = 0;
122 private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
123 private AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
124 private boolean mInteractive = false;
125 private int attempt = 0;
126 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
127 private OnPresencePacketReceived presenceListener = null;
128 private OnJinglePacketReceived jingleListener = null;
129 private OnIqPacketReceived unregisteredIqListener = null;
130 private OnMessagePacketReceived messageListener = null;
131 private OnStatusChanged statusListener = null;
132 private OnBindListener bindListener = null;
133 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
134 private OnMessageAcknowledged acknowledgedListener = null;
135 private XmppConnectionService mXmppConnectionService = null;
136
137 private SaslMechanism saslMechanism;
138
139 private class MyKeyManager implements X509KeyManager {
140 @Override
141 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
142 return account.getPrivateKeyAlias();
143 }
144
145 @Override
146 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
147 return null;
148 }
149
150 @Override
151 public X509Certificate[] getCertificateChain(String alias) {
152 Log.d(Config.LOGTAG,"getting certificate chain");
153 try {
154 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
155 } catch (Exception e) {
156 Log.d(Config.LOGTAG,e.getMessage());
157 return new X509Certificate[0];
158 }
159 }
160
161 @Override
162 public String[] getClientAliases(String s, Principal[] principals) {
163 return new String[0];
164 }
165
166 @Override
167 public String[] getServerAliases(String s, Principal[] principals) {
168 return new String[0];
169 }
170
171 @Override
172 public PrivateKey getPrivateKey(String alias) {
173 try {
174 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
175 } catch (Exception e) {
176 return null;
177 }
178 }
179 }
180
181 private Identity mServerIdentity = Identity.UNKNOWN;
182
183 public final OnIqPacketReceived registrationResponseListener = new OnIqPacketReceived() {
184 @Override
185 public void onIqPacketReceived(Account account, IqPacket packet) {
186 if (packet.getType() == IqPacket.TYPE.RESULT) {
187 account.setOption(Account.OPTION_REGISTER, false);
188 forceCloseSocket();
189 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
190 } else {
191 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
192 "The password is too weak",
193 "Please use a longer password.");
194 Element error = packet.findChild("error");
195 Account.State state = Account.State.REGISTRATION_FAILED;
196 if (error != null) {
197 if (error.hasChild("conflict")) {
198 state = Account.State.REGISTRATION_CONFLICT;
199 } else if (error.hasChild("resource-constraint")
200 && "wait".equals(error.getAttribute("type"))) {
201 state = Account.State.REGISTRATION_PLEASE_WAIT;
202 } else if (error.hasChild("not-acceptable")
203 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
204 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
205 }
206 }
207 changeStatus(state);
208 forceCloseSocket();
209 }
210 }
211 };
212
213 public XmppConnection(final Account account, final XmppConnectionService service) {
214 this.account = account;
215 this.wakeLock = service.getPowerManager().newWakeLock(
216 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
217 tagWriter = new TagWriter();
218 mXmppConnectionService = service;
219 }
220
221 protected synchronized void changeStatus(final Account.State nextStatus) {
222 if (Thread.currentThread().isInterrupted()) {
223 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": not changing status to "+nextStatus+" because thread was interrupted");
224 }
225 if (account.getStatus() != nextStatus) {
226 if ((nextStatus == Account.State.OFFLINE)
227 && (account.getStatus() != Account.State.CONNECTING)
228 && (account.getStatus() != Account.State.ONLINE)
229 && (account.getStatus() != Account.State.DISABLED)) {
230 return;
231 }
232 if (nextStatus == Account.State.ONLINE) {
233 this.attempt = 0;
234 }
235 account.setStatus(nextStatus);
236 if (statusListener != null) {
237 statusListener.onStatusChanged(account);
238 }
239 }
240 }
241
242 public void prepareNewConnection() {
243 this.lastConnect = SystemClock.elapsedRealtime();
244 this.lastPingSent = SystemClock.elapsedRealtime();
245 this.lastDiscoStarted = Long.MAX_VALUE;
246 this.changeStatus(Account.State.CONNECTING);
247 }
248
249 protected void connect() {
250 if (mXmppConnectionService.areMessagesInitialized()) {
251 mXmppConnectionService.resetSendingToWaiting(account);
252 }
253 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
254 features.encryptionEnabled = false;
255 this.attempt++;
256 switch (account.getJid().getDomainpart()) {
257 case "chat.facebook.com":
258 mServerIdentity = Identity.FACEBOOK;
259 break;
260 case "nimbuzz.com":
261 mServerIdentity = Identity.NIMBUZZ;
262 break;
263 default:
264 mServerIdentity = Identity.UNKNOWN;
265 break;
266 }
267 try {
268 Socket localSocket;
269 shouldAuthenticate = needsBinding = !account.isOptionSet(Account.OPTION_REGISTER);
270 tagReader = new XmlReader(wakeLock);
271 tagWriter = new TagWriter();
272 this.changeStatus(Account.State.CONNECTING);
273 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
274 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
275 if (useTor) {
276 String destination;
277 if (account.getHostname() == null || account.getHostname().isEmpty()) {
278 destination = account.getServer().toString();
279 } else {
280 destination = account.getHostname();
281 }
282 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": connect to " + destination + " via Tor");
283 localSocket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
284 try {
285 startXmpp(localSocket);
286 } catch (InterruptedException e) {
287 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
288 return;
289 } catch (Exception e) {
290 throw new IOException(e.getMessage());
291 }
292 } else if (extended && account.getHostname() != null && !account.getHostname().isEmpty()) {
293
294 InetSocketAddress address = new InetSocketAddress(account.getHostname(), account.getPort());
295
296 features.encryptionEnabled = account.getPort() == 5223;
297
298 try {
299 if (features.encryptionEnabled) {
300 try {
301 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
302 localSocket = tlsFactoryVerifier.factory.createSocket();
303 localSocket.connect(address, Config.SOCKET_TIMEOUT * 1000);
304 final SSLSession session = ((SSLSocket) localSocket).getSession();
305 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), session)) {
306 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
307 throw new SecurityException();
308 }
309 } catch (KeyManagementException e) {
310 features.encryptionEnabled = false;
311 localSocket = new Socket();
312 }
313 } else {
314 localSocket = new Socket();
315 localSocket.connect(address, Config.SOCKET_TIMEOUT * 1000);
316 }
317 } catch (IOException e) {
318 throw new UnknownHostException();
319 }
320 try {
321 startXmpp(localSocket);
322 } catch (InterruptedException e) {
323 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
324 return;
325 } catch (Exception e) {
326 throw new IOException(e.getMessage());
327 }
328 } else if (DNSHelper.isIp(account.getServer().toString())) {
329 localSocket = new Socket();
330 try {
331 localSocket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
332 } catch (IOException e) {
333 throw new UnknownHostException();
334 }
335 try {
336 startXmpp(localSocket);
337 } catch (InterruptedException e) {
338 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
339 return;
340 } catch (Exception e) {
341 throw new IOException(e.getMessage());
342 }
343 } else {
344 final Bundle result = DNSHelper.getSRVRecord(account.getServer(), mXmppConnectionService);
345 final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
346 for (Iterator<Parcelable> iterator = values.iterator(); iterator.hasNext(); ) {
347 if (Thread.currentThread().isInterrupted()) {
348 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Thread was interrupted");
349 return;
350 }
351 final Bundle namePort = (Bundle) iterator.next();
352 try {
353 String srvRecordServer;
354 try {
355 srvRecordServer = IDN.toASCII(namePort.getString("name"));
356 } catch (final IllegalArgumentException e) {
357 // TODO: Handle me?`
358 srvRecordServer = "";
359 }
360 final int srvRecordPort = namePort.getInt("port");
361 final String srvIpServer = namePort.getString("ip");
362 // if tls is true, encryption is implied and must not be started
363 features.encryptionEnabled = namePort.getBoolean("tls");
364 final InetSocketAddress addr;
365 if (srvIpServer != null) {
366 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
367 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
368 + ": using values from dns " + srvRecordServer
369 + "[" + srvIpServer + "]:" + srvRecordPort + " tls: " + features.encryptionEnabled);
370 } else {
371 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
372 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
373 + ": using values from dns "
374 + srvRecordServer + ":" + srvRecordPort + " tls: " + features.encryptionEnabled);
375 }
376
377 if (!features.encryptionEnabled) {
378 localSocket = new Socket();
379 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
380 } else {
381 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
382 localSocket = tlsFactoryVerifier.factory.createSocket();
383
384 if (localSocket == null) {
385 throw new IOException("could not initialize ssl socket");
386 }
387
388 SSLSocketHelper.setSecurity((SSLSocket) localSocket);
389 SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) localSocket, account.getServer().getDomainpart());
390 SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) localSocket, "xmpp-client");
391
392 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
393
394 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) localSocket).getSession())) {
395 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
396 throw new SecurityException();
397 }
398 }
399 if (startXmpp(localSocket)) {
400 break; // successfully connected to server that speaks xmpp
401 } else {
402 localSocket.close();
403 }
404 } catch (final SecurityException e) {
405 throw e;
406 } catch (InterruptedException e) {
407 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": thread was interrupted before beginning stream");
408 return;
409 } catch (final Throwable e) {
410 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
411 if (!iterator.hasNext()) {
412 throw new UnknownHostException();
413 }
414 }
415 }
416 }
417 processStream();
418 } catch (final java.lang.SecurityException e) {
419 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
420 } catch (final RegistrationNotSupportedException e) {
421 this.changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
422 } catch (final IncompatibleServerException e) {
423 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
424 } catch (final SecurityException e) {
425 this.changeStatus(Account.State.SECURITY_ERROR);
426 } catch (final UnauthorizedException e) {
427 this.changeStatus(Account.State.UNAUTHORIZED);
428 } catch (final PaymentRequiredException e) {
429 this.changeStatus(Account.State.PAYMENT_REQUIRED);
430 } catch (final UnknownHostException | ConnectException e) {
431 this.changeStatus(Account.State.SERVER_NOT_FOUND);
432 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
433 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
434 } catch(final StreamErrorHostUnknown e) {
435 this.changeStatus(Account.State.HOST_UNKNOWN);
436 } catch(final StreamErrorPolicyViolation e) {
437 this.changeStatus(Account.State.POLICY_VIOLATION);
438 } catch(final StreamError e) {
439 this.changeStatus(Account.State.STREAM_ERROR);
440 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
441 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
442 this.changeStatus(Account.State.OFFLINE);
443 this.attempt = Math.max(0, this.attempt - 1);
444 } finally {
445 if (!Thread.currentThread().isInterrupted()) {
446 forceCloseSocket();
447 if (wakeLock.isHeld()) {
448 try {
449 wakeLock.release();
450 } catch (final RuntimeException ignored) {
451 }
452 }
453 } else {
454 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": not force closing socket and releasing wake lock because thread was interrupted");
455 }
456 }
457 }
458
459 /**
460 * Starts xmpp protocol, call after connecting to socket
461 * @return true if server returns with valid xmpp, false otherwise
462 */
463 private boolean startXmpp(Socket socket) throws Exception {
464 if (Thread.currentThread().isInterrupted()) {
465 throw new InterruptedException();
466 }
467 this.socket = socket;
468 tagWriter.setOutputStream(socket.getOutputStream());
469 tagReader.setInputStream(socket.getInputStream());
470 tagWriter.beginDocument();
471 sendStartStream();
472 final Tag tag = tagReader.readTag();
473 return tag != null && tag.isStart("stream");
474 }
475
476 private static class TlsFactoryVerifier {
477 private final SSLSocketFactory factory;
478 private final HostnameVerifier verifier;
479
480 public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
481 this.factory = factory;
482 this.verifier = verifier;
483 if (factory == null || verifier == null) {
484 throw new IOException("could not setup ssl");
485 }
486 }
487 }
488
489 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
490 final SSLContext sc = SSLSocketHelper.getSSLContext();
491 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
492 KeyManager[] keyManager;
493 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
494 keyManager = new KeyManager[]{new MyKeyManager()};
495 } else {
496 keyManager = null;
497 }
498 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()}, mXmppConnectionService.getRNG());
499 final SSLSocketFactory factory = sc.getSocketFactory();
500 final HostnameVerifier verifier;
501 if (mInteractive) {
502 verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
503 } else {
504 verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
505 }
506
507 return new TlsFactoryVerifier(factory, verifier);
508 }
509
510 @Override
511 public void run() {
512 forceCloseSocket();
513 connect();
514 }
515
516 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
517 Tag nextTag = tagReader.readTag();
518 while (nextTag != null && !nextTag.isEnd("stream")) {
519 if (nextTag.isStart("error")) {
520 processStreamError(nextTag);
521 } else if (nextTag.isStart("features")) {
522 processStreamFeatures(nextTag);
523 } else if (nextTag.isStart("proceed")) {
524 switchOverToTls(nextTag);
525 } else if (nextTag.isStart("success")) {
526 final String challenge = tagReader.readElement(nextTag).getContent();
527 try {
528 saslMechanism.getResponse(challenge);
529 } catch (final SaslMechanism.AuthenticationException e) {
530 disconnect(true);
531 Log.e(Config.LOGTAG, String.valueOf(e));
532 }
533 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
534 account.setKey(Account.PINNED_MECHANISM_KEY,
535 String.valueOf(saslMechanism.getPriority()));
536 tagReader.reset();
537 sendStartStream();
538 final Tag tag = tagReader.readTag();
539 if (tag != null && tag.isStart("stream")) {
540 processStream();
541 } else {
542 throw new IOException("server didn't restart stream after successful auth");
543 }
544 break;
545 } else if (nextTag.isStart("failure")) {
546 final Element failure = tagReader.readElement(nextTag);
547 final String text = failure.findChildContent("text");
548 if (failure.hasChild("account-disabled")
549 && text != null
550 && text.contains("renew")
551 && Config.MAGIC_CREATE_DOMAIN != null
552 && text.contains(Config.MAGIC_CREATE_DOMAIN)) {
553 throw new PaymentRequiredException();
554 } else {
555 throw new UnauthorizedException();
556 }
557 } else if (nextTag.isStart("challenge")) {
558 final String challenge = tagReader.readElement(nextTag).getContent();
559 final Element response = new Element("response");
560 response.setAttribute("xmlns",
561 "urn:ietf:params:xml:ns:xmpp-sasl");
562 try {
563 response.setContent(saslMechanism.getResponse(challenge));
564 } catch (final SaslMechanism.AuthenticationException e) {
565 // TODO: Send auth abort tag.
566 Log.e(Config.LOGTAG, e.toString());
567 }
568 tagWriter.writeElement(response);
569 } else if (nextTag.isStart("enabled")) {
570 final Element enabled = tagReader.readElement(nextTag);
571 if ("true".equals(enabled.getAttribute("resume"))) {
572 this.streamId = enabled.getAttribute("id");
573 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
574 + ": stream management(" + smVersion
575 + ") enabled (resumable)");
576 } else {
577 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
578 + ": stream management(" + smVersion + ") enabled");
579 }
580 this.stanzasReceived = 0;
581 final RequestPacket r = new RequestPacket(smVersion);
582 tagWriter.writeStanzaAsync(r);
583 } else if (nextTag.isStart("resumed")) {
584 lastPacketReceived = SystemClock.elapsedRealtime();
585 final Element resumed = tagReader.readElement(nextTag);
586 final String h = resumed.getAttribute("h");
587 try {
588 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
589 synchronized (this.mStanzaQueue) {
590 final int serverCount = Integer.parseInt(h);
591 if (serverCount != stanzasSent) {
592 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
593 + ": session resumed with lost packages");
594 stanzasSent = serverCount;
595 } else {
596 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
597 }
598 acknowledgeStanzaUpTo(serverCount);
599 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
600 failedStanzas.add(mStanzaQueue.valueAt(i));
601 }
602 mStanzaQueue.clear();
603 }
604 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
605 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
606 if (packet instanceof MessagePacket) {
607 MessagePacket message = (MessagePacket) packet;
608 mXmppConnectionService.markMessage(account,
609 message.getTo().toBareJid(),
610 message.getId(),
611 Message.STATUS_UNSEND);
612 }
613 sendPacket(packet);
614 }
615 } catch (final NumberFormatException ignored) {
616 }
617 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
618 changeStatus(Account.State.ONLINE);
619 } else if (nextTag.isStart("r")) {
620 tagReader.readElement(nextTag);
621 if (Config.EXTENDED_SM_LOGGING) {
622 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
623 }
624 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
625 tagWriter.writeStanzaAsync(ack);
626 } else if (nextTag.isStart("a")) {
627 final Element ack = tagReader.readElement(nextTag);
628 lastPacketReceived = SystemClock.elapsedRealtime();
629 try {
630 synchronized (this.mStanzaQueue) {
631 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
632 acknowledgeStanzaUpTo(serverSequence);
633 }
634 } catch (NumberFormatException | NullPointerException e) {
635 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
636 }
637 } else if (nextTag.isStart("failed")) {
638 Element failed = tagReader.readElement(nextTag);
639 try {
640 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
641 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed but server acknowledged stanza #"+serverCount);
642 synchronized (this.mStanzaQueue) {
643 acknowledgeStanzaUpTo(serverCount);
644 }
645 } catch (NumberFormatException | NullPointerException e) {
646 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed");
647 }
648 resetStreamId();
649 if (account.getStatus() != Account.State.ONLINE) {
650 sendBindRequest();
651 }
652 } else if (nextTag.isStart("iq")) {
653 processIq(nextTag);
654 } else if (nextTag.isStart("message")) {
655 processMessage(nextTag);
656 } else if (nextTag.isStart("presence")) {
657 processPresence(nextTag);
658 }
659 nextTag = tagReader.readTag();
660 }
661 }
662
663 private void acknowledgeStanzaUpTo(int serverCount) {
664 for (int i = 0; i < mStanzaQueue.size(); ++i) {
665 if (serverCount >= mStanzaQueue.keyAt(i)) {
666 if (Config.EXTENDED_SM_LOGGING) {
667 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
668 }
669 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
670 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
671 MessagePacket packet = (MessagePacket) stanza;
672 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
673 }
674 mStanzaQueue.removeAt(i);
675 i--;
676 }
677 }
678 }
679
680 private Element processPacket(final Tag currentTag, final int packetType)
681 throws XmlPullParserException, IOException {
682 Element element;
683 switch (packetType) {
684 case PACKET_IQ:
685 element = new IqPacket();
686 break;
687 case PACKET_MESSAGE:
688 element = new MessagePacket();
689 break;
690 case PACKET_PRESENCE:
691 element = new PresencePacket();
692 break;
693 default:
694 return null;
695 }
696 element.setAttributes(currentTag.getAttributes());
697 Tag nextTag = tagReader.readTag();
698 if (nextTag == null) {
699 throw new IOException("interrupted mid tag");
700 }
701 while (!nextTag.isEnd(element.getName())) {
702 if (!nextTag.isNo()) {
703 final Element child = tagReader.readElement(nextTag);
704 final String type = currentTag.getAttribute("type");
705 if (packetType == PACKET_IQ
706 && "jingle".equals(child.getName())
707 && ("set".equalsIgnoreCase(type) || "get"
708 .equalsIgnoreCase(type))) {
709 element = new JinglePacket();
710 element.setAttributes(currentTag.getAttributes());
711 }
712 element.addChild(child);
713 }
714 nextTag = tagReader.readTag();
715 if (nextTag == null) {
716 throw new IOException("interrupted mid tag");
717 }
718 }
719 if (stanzasReceived == Integer.MAX_VALUE) {
720 resetStreamId();
721 throw new IOException("time to restart the session. cant handle >2 billion pcks");
722 }
723 ++stanzasReceived;
724 lastPacketReceived = SystemClock.elapsedRealtime();
725 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
726 Log.d(Config.LOGTAG,"[background stanza] "+element);
727 }
728 return element;
729 }
730
731 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
732 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
733
734 if (packet.getId() == null) {
735 return; // an iq packet without id is definitely invalid
736 }
737
738 if (packet instanceof JinglePacket) {
739 if (this.jingleListener != null) {
740 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
741 }
742 } else {
743 OnIqPacketReceived callback = null;
744 synchronized (this.packetCallbacks) {
745 if (packetCallbacks.containsKey(packet.getId())) {
746 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
747 // Packets to the server should have responses from the server
748 if (packetCallbackDuple.first.toServer(account)) {
749 if (packet.fromServer(account) || mServerIdentity == Identity.FACEBOOK) {
750 callback = packetCallbackDuple.second;
751 packetCallbacks.remove(packet.getId());
752 } else {
753 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
754 }
755 } else {
756 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
757 callback = packetCallbackDuple.second;
758 packetCallbacks.remove(packet.getId());
759 } else {
760 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
761 }
762 }
763 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
764 callback = this.unregisteredIqListener;
765 }
766 }
767 if (callback != null) {
768 callback.onIqPacketReceived(account,packet);
769 }
770 }
771 }
772
773 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
774 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
775 this.messageListener.onMessagePacketReceived(account, packet);
776 }
777
778 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
779 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
780 this.presenceListener.onPresencePacketReceived(account, packet);
781 }
782
783 private void sendStartTLS() throws IOException {
784 final Tag startTLS = Tag.empty("starttls");
785 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
786 tagWriter.writeTag(startTLS);
787 }
788
789
790
791 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
792 tagReader.readTag();
793 try {
794 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
795 final InetAddress address = socket == null ? null : socket.getInetAddress();
796
797 if (address == null) {
798 throw new IOException("could not setup ssl");
799 }
800
801 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
802
803 if (sslSocket == null) {
804 throw new IOException("could not initialize ssl socket");
805 }
806
807 SSLSocketHelper.setSecurity(sslSocket);
808
809 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
810 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
811 throw new SecurityException();
812 }
813 tagReader.setInputStream(sslSocket.getInputStream());
814 tagWriter.setOutputStream(sslSocket.getOutputStream());
815 sendStartStream();
816 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
817 features.encryptionEnabled = true;
818 final Tag tag = tagReader.readTag();
819 if (tag != null && tag.isStart("stream")) {
820 processStream();
821 } else {
822 throw new IOException("server didn't restart stream after STARTTLS");
823 }
824 sslSocket.close();
825 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
826 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
827 throw new SecurityException();
828 }
829 }
830
831 private void processStreamFeatures(final Tag currentTag)
832 throws XmlPullParserException, IOException {
833 this.streamFeatures = tagReader.readElement(currentTag);
834 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
835 sendStartTLS();
836 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
837 if (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS) {
838 sendRegistryRequest();
839 } else {
840 throw new IncompatibleServerException();
841 }
842 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
843 throw new RegistrationNotSupportedException();
844 } else if (this.streamFeatures.hasChild("mechanisms")
845 && shouldAuthenticate
846 && (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS)) {
847 authenticate();
848 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
849 if (Config.EXTENDED_SM_LOGGING) {
850 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
851 }
852 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
853 this.tagWriter.writeStanzaAsync(resume);
854 } else if (needsBinding) {
855 if (this.streamFeatures.hasChild("bind")) {
856 sendBindRequest();
857 } else {
858 throw new IncompatibleServerException();
859 }
860 }
861 }
862
863 private void authenticate() throws IOException {
864 final List<String> mechanisms = extractMechanisms(streamFeatures
865 .findChild("mechanisms"));
866 final Element auth = new Element("auth");
867 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
868 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
869 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
870 } else if (mechanisms.contains("SCRAM-SHA-1")) {
871 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
872 } else if (mechanisms.contains("PLAIN")) {
873 saslMechanism = new Plain(tagWriter, account);
874 } else if (mechanisms.contains("DIGEST-MD5")) {
875 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
876 } else if (mechanisms.contains("ANONYMOUS")) {
877 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
878 }
879 if (saslMechanism != null) {
880 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
881 if (pinnedMechanism > saslMechanism.getPriority()) {
882 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
883 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
884 ") than pinned priority (" + pinnedMechanism +
885 "). Possible downgrade attack?");
886 throw new SecurityException();
887 }
888 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
889 auth.setAttribute("mechanism", saslMechanism.getMechanism());
890 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
891 auth.setContent(saslMechanism.getClientFirstMessage());
892 }
893 tagWriter.writeElement(auth);
894 } else {
895 throw new IncompatibleServerException();
896 }
897 }
898
899 private List<String> extractMechanisms(final Element stream) {
900 final ArrayList<String> mechanisms = new ArrayList<>(stream
901 .getChildren().size());
902 for (final Element child : stream.getChildren()) {
903 mechanisms.add(child.getContent());
904 }
905 return mechanisms;
906 }
907
908 private void sendRegistryRequest() {
909 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
910 register.query("jabber:iq:register");
911 register.setTo(account.getServer());
912 sendUnmodifiedIqPacket(register, new OnIqPacketReceived() {
913
914 @Override
915 public void onIqPacketReceived(final Account account, final IqPacket packet) {
916 boolean failed = false;
917 if (packet.getType() == IqPacket.TYPE.RESULT
918 && packet.query().hasChild("username")
919 && (packet.query().hasChild("password"))) {
920 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
921 final Element username = new Element("username").setContent(account.getUsername());
922 final Element password = new Element("password").setContent(account.getPassword());
923 register.query("jabber:iq:register").addChild(username);
924 register.query().addChild(password);
925 register.setFrom(account.getJid().toBareJid());
926 sendUnmodifiedIqPacket(register, registrationResponseListener);
927 } else if (packet.getType() == IqPacket.TYPE.RESULT
928 && (packet.query().hasChild("x", "jabber:x:data"))) {
929 final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
930 final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
931 final String id = packet.getId();
932
933 Bitmap captcha = null;
934 if (blob != null) {
935 try {
936 final String base64Blob = blob.getContent();
937 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
938 InputStream stream = new ByteArrayInputStream(strBlob);
939 captcha = BitmapFactory.decodeStream(stream);
940 } catch (Exception e) {
941 //ignored
942 }
943 } else {
944 try {
945 Field url = data.getFieldByName("url");
946 String urlString = url.findChildContent("value");
947 URL uri = new URL(urlString);
948 captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
949 } catch (IOException e) {
950 Log.e(Config.LOGTAG, e.toString());
951 }
952 }
953
954 if (captcha != null) {
955 failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
956 }
957 } else {
958 failed = true;
959 }
960
961 if (failed) {
962 final Element instructions = packet.query().findChild("instructions");
963 setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
964 }
965 }
966 });
967 }
968
969 private void setAccountCreationFailed(String instructions) {
970 changeStatus(Account.State.REGISTRATION_FAILED);
971 disconnect(true);
972 Log.d(Config.LOGTAG, account.getJid().toBareJid()
973 + ": could not register. instructions are"
974 + instructions);
975 }
976
977 public void resetEverything() {
978 resetAttemptCount(true);
979 resetStreamId();
980 clearIqCallbacks();
981 mStanzaQueue.clear();
982 synchronized (this.disco) {
983 disco.clear();
984 }
985 }
986
987 private void sendBindRequest() {
988 while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
989 try {
990 Thread.sleep(500);
991 } catch (final InterruptedException ignored) {
992 }
993 }
994 needsBinding = false;
995 clearIqCallbacks();
996 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
997 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
998 .addChild("resource").setContent(account.getResource());
999 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
1000 @Override
1001 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1002 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1003 return;
1004 }
1005 final Element bind = packet.findChild("bind");
1006 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1007 final Element jid = bind.findChild("jid");
1008 if (jid != null && jid.getContent() != null) {
1009 try {
1010 if (account.setJid(Jid.fromString(jid.getContent()))) {
1011 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": bare jid changed during bind. updating database");
1012 mXmppConnectionService.databaseBackend.updateAccount(account);
1013 }
1014 if (streamFeatures.hasChild("session")
1015 && !streamFeatures.findChild("session").hasChild("optional")) {
1016 sendStartSession();
1017 } else {
1018 sendPostBindInitialization();
1019 }
1020 return;
1021 } catch (final InvalidJidException e) {
1022 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server reported invalid jid ("+jid.getContent()+") on bind");
1023 }
1024 } else {
1025 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1026 }
1027 } else {
1028 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1029 }
1030 forceCloseSocket();
1031 changeStatus(Account.State.BIND_FAILURE);
1032 }
1033 });
1034 }
1035
1036 private void clearIqCallbacks() {
1037 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1038 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1039 synchronized (this.packetCallbacks) {
1040 if (this.packetCallbacks.size() == 0) {
1041 return;
1042 }
1043 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
1044 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1045 while (iterator.hasNext()) {
1046 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1047 callbacks.add(entry.second);
1048 iterator.remove();
1049 }
1050 }
1051 for(OnIqPacketReceived callback : callbacks) {
1052 callback.onIqPacketReceived(account,failurePacket);
1053 }
1054 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1055 }
1056
1057 public void sendDiscoTimeout() {
1058 if (mWaitForDisco.compareAndSet(true, false)) {
1059 finalizeBind();
1060 }
1061 }
1062
1063 private void sendStartSession() {
1064 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending legacy session to outdated server");
1065 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1066 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1067 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
1068 @Override
1069 public void onIqPacketReceived(Account account, IqPacket packet) {
1070 if (packet.getType() == IqPacket.TYPE.RESULT) {
1071 sendPostBindInitialization();
1072 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1073 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
1074 disconnect(true);
1075 }
1076 }
1077 });
1078 }
1079
1080 private void sendPostBindInitialization() {
1081 smVersion = 0;
1082 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1083 smVersion = 3;
1084 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1085 smVersion = 2;
1086 }
1087 if (smVersion != 0) {
1088 synchronized (this.mStanzaQueue) {
1089 final EnablePacket enable = new EnablePacket(smVersion);
1090 tagWriter.writeStanzaAsync(enable);
1091 stanzasSent = 0;
1092 mStanzaQueue.clear();
1093 }
1094 }
1095 features.carbonsEnabled = false;
1096 features.blockListRequested = false;
1097 synchronized (this.disco) {
1098 this.disco.clear();
1099 }
1100 mPendingServiceDiscoveries.set(0);
1101 mWaitForDisco.set(mServerIdentity != Identity.NIMBUZZ && smVersion != 0);
1102 lastDiscoStarted = SystemClock.elapsedRealtime();
1103 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
1104 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1105 Element caps = streamFeatures.findChild("c");
1106 final String hash = caps == null ? null : caps.getAttribute("hash");
1107 final String ver = caps == null ? null : caps.getAttribute("ver");
1108 ServiceDiscoveryResult discoveryResult = null;
1109 if (hash != null && ver != null) {
1110 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1111 }
1112 if (discoveryResult == null) {
1113 sendServiceDiscoveryInfo(account.getServer());
1114 } else {
1115 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server caps came from cache");
1116 disco.put(account.getServer(), discoveryResult);
1117 }
1118 sendServiceDiscoveryInfo(account.getJid().toBareJid());
1119 sendServiceDiscoveryItems(account.getServer());
1120
1121 if (!mWaitForDisco.get()) {
1122 finalizeBind();
1123 }
1124 this.lastSessionStarted = SystemClock.elapsedRealtime();
1125 }
1126
1127 private void sendServiceDiscoveryInfo(final Jid jid) {
1128 mPendingServiceDiscoveries.incrementAndGet();
1129 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1130 iq.setTo(jid);
1131 iq.query("http://jabber.org/protocol/disco#info");
1132 this.sendIqPacket(iq, new OnIqPacketReceived() {
1133
1134 @Override
1135 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1136 if (packet.getType() == IqPacket.TYPE.RESULT) {
1137 boolean advancedStreamFeaturesLoaded;
1138 synchronized (XmppConnection.this.disco) {
1139 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1140 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1141 if (mServerIdentity == Identity.UNKNOWN && id.getType().equals("im") &&
1142 id.getCategory().equals("server") && id.getName() != null &&
1143 jid.equals(account.getServer())) {
1144 switch (id.getName()) {
1145 case "Prosody":
1146 mServerIdentity = Identity.PROSODY;
1147 break;
1148 case "ejabberd":
1149 mServerIdentity = Identity.EJABBERD;
1150 break;
1151 case "Slack-XMPP":
1152 mServerIdentity = Identity.SLACK;
1153 break;
1154 }
1155 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server name: " + id.getName());
1156 }
1157 }
1158 if (jid.equals(account.getServer())) {
1159 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1160 }
1161 disco.put(jid, result);
1162 advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
1163 && disco.containsKey(account.getJid().toBareJid());
1164 }
1165 if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
1166 enableAdvancedStreamFeatures();
1167 }
1168 } else {
1169 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
1170 }
1171 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1172 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1173 && mWaitForDisco.compareAndSet(true, false)) {
1174 finalizeBind();
1175 }
1176 }
1177 }
1178 });
1179 }
1180
1181 private void finalizeBind() {
1182 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
1183 if (bindListener != null) {
1184 bindListener.onBind(account);
1185 }
1186 changeStatus(Account.State.ONLINE);
1187 }
1188
1189 private void enableAdvancedStreamFeatures() {
1190 if (getFeatures().carbons() && !features.carbonsEnabled) {
1191 sendEnableCarbons();
1192 }
1193 if (getFeatures().blocking() && !features.blockListRequested) {
1194 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
1195 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1196 }
1197 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1198 listener.onAdvancedStreamFeaturesAvailable(account);
1199 }
1200 }
1201
1202 private void sendServiceDiscoveryItems(final Jid server) {
1203 mPendingServiceDiscoveries.incrementAndGet();
1204 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1205 iq.setTo(server.toDomainJid());
1206 iq.query("http://jabber.org/protocol/disco#items");
1207 this.sendIqPacket(iq, new OnIqPacketReceived() {
1208
1209 @Override
1210 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1211 if (packet.getType() == IqPacket.TYPE.RESULT) {
1212 final List<Element> elements = packet.query().getChildren();
1213 for (final Element element : elements) {
1214 if (element.getName().equals("item")) {
1215 final Jid jid = element.getAttributeAsJid("jid");
1216 if (jid != null && !jid.equals(account.getServer())) {
1217 sendServiceDiscoveryInfo(jid);
1218 }
1219 }
1220 }
1221 } else {
1222 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
1223 }
1224 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1225 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1226 && mWaitForDisco.compareAndSet(true, false)) {
1227 finalizeBind();
1228 }
1229 }
1230 }
1231 });
1232 }
1233
1234 private void sendEnableCarbons() {
1235 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1236 iq.addChild("enable", "urn:xmpp:carbons:2");
1237 this.sendIqPacket(iq, new OnIqPacketReceived() {
1238
1239 @Override
1240 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1241 if (!packet.hasChild("error")) {
1242 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1243 + ": successfully enabled carbons");
1244 features.carbonsEnabled = true;
1245 } else {
1246 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1247 + ": error enableing carbons " + packet.toString());
1248 }
1249 }
1250 });
1251 }
1252
1253 private void processStreamError(final Tag currentTag)
1254 throws XmlPullParserException, IOException {
1255 final Element streamError = tagReader.readElement(currentTag);
1256 if (streamError == null) {
1257 return;
1258 }
1259 if (streamError.hasChild("conflict")) {
1260 final String resource = account.getResource().split("\\.")[0];
1261 account.setResource(resource + "." + nextRandomId());
1262 Log.d(Config.LOGTAG,
1263 account.getJid().toBareJid() + ": switching resource due to conflict ("
1264 + account.getResource() + ")");
1265 throw new IOException();
1266 } else if (streamError.hasChild("host-unknown")) {
1267 throw new StreamErrorHostUnknown();
1268 } else if (streamError.hasChild("policy-violation")) {
1269 throw new StreamErrorPolicyViolation();
1270 } else {
1271 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
1272 throw new StreamError();
1273 }
1274 }
1275
1276 private void sendStartStream() throws IOException {
1277 final Tag stream = Tag.start("stream:stream");
1278 stream.setAttribute("to", account.getServer().toString());
1279 stream.setAttribute("version", "1.0");
1280 stream.setAttribute("xml:lang", "en");
1281 stream.setAttribute("xmlns", "jabber:client");
1282 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1283 tagWriter.writeTag(stream);
1284 }
1285
1286 private String nextRandomId() {
1287 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
1288 }
1289
1290 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1291 packet.setFrom(account.getJid());
1292 return this.sendUnmodifiedIqPacket(packet, callback);
1293 }
1294
1295 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1296 if (packet.getId() == null) {
1297 final String id = nextRandomId();
1298 packet.setAttribute("id", id);
1299 }
1300 if (callback != null) {
1301 synchronized (this.packetCallbacks) {
1302 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1303 }
1304 }
1305 this.sendPacket(packet);
1306 return packet.getId();
1307 }
1308
1309 public void sendMessagePacket(final MessagePacket packet) {
1310 this.sendPacket(packet);
1311 }
1312
1313 public void sendPresencePacket(final PresencePacket packet) {
1314 this.sendPacket(packet);
1315 }
1316
1317 private synchronized void sendPacket(final AbstractStanza packet) {
1318 if (stanzasSent == Integer.MAX_VALUE) {
1319 resetStreamId();
1320 disconnect(true);
1321 return;
1322 }
1323 synchronized (this.mStanzaQueue) {
1324 tagWriter.writeStanzaAsync(packet);
1325 if (packet instanceof AbstractAcknowledgeableStanza) {
1326 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1327 ++stanzasSent;
1328 this.mStanzaQueue.append(stanzasSent, stanza);
1329 if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
1330 if (Config.EXTENDED_SM_LOGGING) {
1331 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1332 }
1333 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1334 }
1335 }
1336 }
1337 }
1338
1339 public void sendPing() {
1340 if (!r()) {
1341 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1342 iq.setFrom(account.getJid());
1343 iq.addChild("ping", "urn:xmpp:ping");
1344 this.sendIqPacket(iq, null);
1345 }
1346 this.lastPingSent = SystemClock.elapsedRealtime();
1347 }
1348
1349 public void setOnMessagePacketReceivedListener(
1350 final OnMessagePacketReceived listener) {
1351 this.messageListener = listener;
1352 }
1353
1354 public void setOnUnregisteredIqPacketReceivedListener(
1355 final OnIqPacketReceived listener) {
1356 this.unregisteredIqListener = listener;
1357 }
1358
1359 public void setOnPresencePacketReceivedListener(
1360 final OnPresencePacketReceived listener) {
1361 this.presenceListener = listener;
1362 }
1363
1364 public void setOnJinglePacketReceivedListener(
1365 final OnJinglePacketReceived listener) {
1366 this.jingleListener = listener;
1367 }
1368
1369 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1370 this.statusListener = listener;
1371 }
1372
1373 public void setOnBindListener(final OnBindListener listener) {
1374 this.bindListener = listener;
1375 }
1376
1377 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1378 this.acknowledgedListener = listener;
1379 }
1380
1381 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1382 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1383 this.advancedStreamFeaturesLoadedListeners.add(listener);
1384 }
1385 }
1386
1387 private void forceCloseSocket() {
1388 if (socket != null) {
1389 try {
1390 socket.close();
1391 } catch (IOException e) {
1392 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception "+e.getMessage()+" during force close");
1393 }
1394 } else {
1395 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": socket was null during force close");
1396 }
1397 }
1398
1399 public void interrupt() {
1400 Thread.currentThread().interrupt();
1401 }
1402
1403 public void disconnect(final boolean force) {
1404 interrupt();
1405 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
1406 if (force) {
1407 tagWriter.forceClose();
1408 forceCloseSocket();
1409 } else {
1410 if (tagWriter.isActive()) {
1411 tagWriter.finish();
1412 try {
1413 int i = 0;
1414 boolean warned = false;
1415 while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
1416 if (!warned) {
1417 Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
1418 warned = true;
1419 }
1420 try {
1421 Thread.sleep(200);
1422 } catch(InterruptedException e) {
1423 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sleep interrupted");
1424 }
1425 i++;
1426 }
1427 if (warned) {
1428 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
1429 }
1430 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
1431 tagWriter.writeTag(Tag.end("stream:stream"));
1432 } catch (final IOException e) {
1433 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
1434 } finally {
1435 forceCloseSocket();
1436 }
1437 }
1438 }
1439 }
1440
1441 public void resetStreamId() {
1442 this.streamId = null;
1443 }
1444
1445 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1446 synchronized (this.disco) {
1447 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1448 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1449 if (cursor.getValue().getFeatures().contains(feature)) {
1450 items.add(cursor);
1451 }
1452 }
1453 return items;
1454 }
1455 }
1456
1457 public Jid findDiscoItemByFeature(final String feature) {
1458 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1459 if (items.size() >= 1) {
1460 return items.get(0).getKey();
1461 }
1462 return null;
1463 }
1464
1465 public boolean r() {
1466 if (getFeatures().sm()) {
1467 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1468 return true;
1469 } else {
1470 return false;
1471 }
1472 }
1473
1474 public String getMucServer() {
1475 synchronized (this.disco) {
1476 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1477 final ServiceDiscoveryResult value = cursor.getValue();
1478 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1479 && !value.getFeatures().contains("jabber:iq:gateway")
1480 && !value.hasIdentity("conference", "irc")) {
1481 return cursor.getKey().toString();
1482 }
1483 }
1484 }
1485 return null;
1486 }
1487
1488 public int getTimeToNextAttempt() {
1489 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1490 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1491 return interval - secondsSinceLast;
1492 }
1493
1494 public int getAttempt() {
1495 return this.attempt;
1496 }
1497
1498 public Features getFeatures() {
1499 return this.features;
1500 }
1501
1502 public long getLastSessionEstablished() {
1503 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1504 return System.currentTimeMillis() - diff;
1505 }
1506
1507 public long getLastConnect() {
1508 return this.lastConnect;
1509 }
1510
1511 public long getLastPingSent() {
1512 return this.lastPingSent;
1513 }
1514
1515 public long getLastDiscoStarted() {
1516 return this.lastDiscoStarted;
1517 }
1518 public long getLastPacketReceived() {
1519 return this.lastPacketReceived;
1520 }
1521
1522 public void sendActive() {
1523 this.sendPacket(new ActivePacket());
1524 }
1525
1526 public void sendInactive() {
1527 this.sendPacket(new InactivePacket());
1528 }
1529
1530 public void resetAttemptCount(boolean resetConnectTime) {
1531 this.attempt = 0;
1532 if (resetConnectTime) {
1533 this.lastConnect = 0;
1534 }
1535 }
1536
1537 public void setInteractive(boolean interactive) {
1538 this.mInteractive = interactive;
1539 }
1540
1541 public Identity getServerIdentity() {
1542 return mServerIdentity;
1543 }
1544
1545 private class UnauthorizedException extends IOException {
1546
1547 }
1548
1549 private class SecurityException extends IOException {
1550
1551 }
1552
1553 private class IncompatibleServerException extends IOException {
1554
1555 }
1556
1557 private class StreamErrorHostUnknown extends StreamError {
1558
1559 }
1560
1561 private class StreamErrorPolicyViolation extends StreamError {
1562
1563 }
1564
1565 private class StreamError extends IOException {
1566
1567 }
1568
1569 private class PaymentRequiredException extends IOException {
1570
1571 }
1572
1573 private class RegistrationNotSupportedException extends IOException {
1574
1575 }
1576
1577 public enum Identity {
1578 FACEBOOK,
1579 SLACK,
1580 EJABBERD,
1581 PROSODY,
1582 NIMBUZZ,
1583 UNKNOWN
1584 }
1585
1586 public class Features {
1587 XmppConnection connection;
1588 private boolean carbonsEnabled = false;
1589 private boolean encryptionEnabled = false;
1590 private boolean blockListRequested = false;
1591
1592 public Features(final XmppConnection connection) {
1593 this.connection = connection;
1594 }
1595
1596 private boolean hasDiscoFeature(final Jid server, final String feature) {
1597 synchronized (XmppConnection.this.disco) {
1598 return connection.disco.containsKey(server) &&
1599 connection.disco.get(server).getFeatures().contains(feature);
1600 }
1601 }
1602
1603 public boolean carbons() {
1604 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1605 }
1606
1607 public boolean blocking() {
1608 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1609 }
1610
1611 public boolean spamReporting() {
1612 return hasDiscoFeature(account.getServer(), "urn:xmpp:reporting:reason:spam:0");
1613 }
1614
1615 public boolean register() {
1616 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1617 }
1618
1619 public boolean sm() {
1620 return streamId != null
1621 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1622 }
1623
1624 public boolean csi() {
1625 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1626 }
1627
1628 public boolean pep() {
1629 synchronized (XmppConnection.this.disco) {
1630 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1631 return info != null && info.hasIdentity("pubsub", "pep");
1632 }
1633 }
1634
1635 public boolean pepPersistent() {
1636 synchronized (XmppConnection.this.disco) {
1637 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1638 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1639 }
1640 }
1641
1642 public boolean mam() {
1643 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")
1644 || hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1645 }
1646
1647 public boolean push() {
1648 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:push:0")
1649 || hasDiscoFeature(account.getServer(), "urn:xmpp:push:0");
1650 }
1651
1652 public boolean rosterVersioning() {
1653 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1654 }
1655
1656 public void setBlockListRequested(boolean value) {
1657 this.blockListRequested = value;
1658 }
1659
1660 public boolean httpUpload(long filesize) {
1661 if (Config.DISABLE_HTTP_UPLOAD) {
1662 return false;
1663 } else {
1664 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1665 if (items.size() > 0) {
1666 try {
1667 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1668 if(filesize <= maxsize) {
1669 return true;
1670 } else {
1671 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": http upload is not available for files with size "+filesize+" (max is "+maxsize+")");
1672 return false;
1673 }
1674 } catch (Exception e) {
1675 return true;
1676 }
1677 } else {
1678 return false;
1679 }
1680 }
1681 }
1682
1683 public long getMaxHttpUploadSize() {
1684 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1685 if (items.size() > 0) {
1686 try {
1687 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1688 } catch (Exception e) {
1689 return -1;
1690 }
1691 } else {
1692 return -1;
1693 }
1694 }
1695
1696 public boolean stanzaIds() {
1697 return hasDiscoFeature(account.getJid().toBareJid(),Xmlns.STANZA_IDS);
1698 }
1699 }
1700
1701 private IqGenerator getIqGenerator() {
1702 return mXmppConnectionService.getIqGenerator();
1703 }
1704}