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 String domain = account.getJid().getDomainpart();
499 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
500 final SSLSocketFactory factory = sc.getSocketFactory();
501 final HostnameVerifier verifier;
502 if (mInteractive) {
503 verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
504 } else {
505 verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
506 }
507
508 return new TlsFactoryVerifier(factory, verifier);
509 }
510
511 @Override
512 public void run() {
513 forceCloseSocket();
514 connect();
515 }
516
517 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
518 Tag nextTag = tagReader.readTag();
519 while (nextTag != null && !nextTag.isEnd("stream")) {
520 if (nextTag.isStart("error")) {
521 processStreamError(nextTag);
522 } else if (nextTag.isStart("features")) {
523 processStreamFeatures(nextTag);
524 } else if (nextTag.isStart("proceed")) {
525 switchOverToTls(nextTag);
526 } else if (nextTag.isStart("success")) {
527 final String challenge = tagReader.readElement(nextTag).getContent();
528 try {
529 saslMechanism.getResponse(challenge);
530 } catch (final SaslMechanism.AuthenticationException e) {
531 disconnect(true);
532 Log.e(Config.LOGTAG, String.valueOf(e));
533 }
534 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
535 account.setKey(Account.PINNED_MECHANISM_KEY,
536 String.valueOf(saslMechanism.getPriority()));
537 tagReader.reset();
538 sendStartStream();
539 final Tag tag = tagReader.readTag();
540 if (tag != null && tag.isStart("stream")) {
541 processStream();
542 } else {
543 throw new IOException("server didn't restart stream after successful auth");
544 }
545 break;
546 } else if (nextTag.isStart("failure")) {
547 final Element failure = tagReader.readElement(nextTag);
548 final String text = failure.findChildContent("text");
549 if (failure.hasChild("account-disabled")
550 && text != null
551 && text.contains("renew")
552 && Config.MAGIC_CREATE_DOMAIN != null
553 && text.contains(Config.MAGIC_CREATE_DOMAIN)) {
554 throw new PaymentRequiredException();
555 } else {
556 throw new UnauthorizedException();
557 }
558 } else if (nextTag.isStart("challenge")) {
559 final String challenge = tagReader.readElement(nextTag).getContent();
560 final Element response = new Element("response");
561 response.setAttribute("xmlns",
562 "urn:ietf:params:xml:ns:xmpp-sasl");
563 try {
564 response.setContent(saslMechanism.getResponse(challenge));
565 } catch (final SaslMechanism.AuthenticationException e) {
566 // TODO: Send auth abort tag.
567 Log.e(Config.LOGTAG, e.toString());
568 }
569 tagWriter.writeElement(response);
570 } else if (nextTag.isStart("enabled")) {
571 final Element enabled = tagReader.readElement(nextTag);
572 if ("true".equals(enabled.getAttribute("resume"))) {
573 this.streamId = enabled.getAttribute("id");
574 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
575 + ": stream management(" + smVersion
576 + ") enabled (resumable)");
577 } else {
578 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
579 + ": stream management(" + smVersion + ") enabled");
580 }
581 this.stanzasReceived = 0;
582 final RequestPacket r = new RequestPacket(smVersion);
583 tagWriter.writeStanzaAsync(r);
584 } else if (nextTag.isStart("resumed")) {
585 lastPacketReceived = SystemClock.elapsedRealtime();
586 final Element resumed = tagReader.readElement(nextTag);
587 final String h = resumed.getAttribute("h");
588 try {
589 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
590 synchronized (this.mStanzaQueue) {
591 final int serverCount = Integer.parseInt(h);
592 if (serverCount != stanzasSent) {
593 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
594 + ": session resumed with lost packages");
595 stanzasSent = serverCount;
596 } else {
597 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
598 }
599 acknowledgeStanzaUpTo(serverCount);
600 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
601 failedStanzas.add(mStanzaQueue.valueAt(i));
602 }
603 mStanzaQueue.clear();
604 }
605 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
606 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
607 if (packet instanceof MessagePacket) {
608 MessagePacket message = (MessagePacket) packet;
609 mXmppConnectionService.markMessage(account,
610 message.getTo().toBareJid(),
611 message.getId(),
612 Message.STATUS_UNSEND);
613 }
614 sendPacket(packet);
615 }
616 } catch (final NumberFormatException ignored) {
617 }
618 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
619 changeStatus(Account.State.ONLINE);
620 } else if (nextTag.isStart("r")) {
621 tagReader.readElement(nextTag);
622 if (Config.EXTENDED_SM_LOGGING) {
623 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
624 }
625 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
626 tagWriter.writeStanzaAsync(ack);
627 } else if (nextTag.isStart("a")) {
628 final Element ack = tagReader.readElement(nextTag);
629 lastPacketReceived = SystemClock.elapsedRealtime();
630 try {
631 synchronized (this.mStanzaQueue) {
632 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
633 acknowledgeStanzaUpTo(serverSequence);
634 }
635 } catch (NumberFormatException | NullPointerException e) {
636 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
637 }
638 } else if (nextTag.isStart("failed")) {
639 Element failed = tagReader.readElement(nextTag);
640 try {
641 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
642 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed but server acknowledged stanza #"+serverCount);
643 synchronized (this.mStanzaQueue) {
644 acknowledgeStanzaUpTo(serverCount);
645 }
646 } catch (NumberFormatException | NullPointerException e) {
647 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": resumption failed");
648 }
649 resetStreamId();
650 if (account.getStatus() != Account.State.ONLINE) {
651 sendBindRequest();
652 }
653 } else if (nextTag.isStart("iq")) {
654 processIq(nextTag);
655 } else if (nextTag.isStart("message")) {
656 processMessage(nextTag);
657 } else if (nextTag.isStart("presence")) {
658 processPresence(nextTag);
659 }
660 nextTag = tagReader.readTag();
661 }
662 }
663
664 private void acknowledgeStanzaUpTo(int serverCount) {
665 for (int i = 0; i < mStanzaQueue.size(); ++i) {
666 if (serverCount >= mStanzaQueue.keyAt(i)) {
667 if (Config.EXTENDED_SM_LOGGING) {
668 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
669 }
670 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
671 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
672 MessagePacket packet = (MessagePacket) stanza;
673 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
674 }
675 mStanzaQueue.removeAt(i);
676 i--;
677 }
678 }
679 }
680
681 private Element processPacket(final Tag currentTag, final int packetType)
682 throws XmlPullParserException, IOException {
683 Element element;
684 switch (packetType) {
685 case PACKET_IQ:
686 element = new IqPacket();
687 break;
688 case PACKET_MESSAGE:
689 element = new MessagePacket();
690 break;
691 case PACKET_PRESENCE:
692 element = new PresencePacket();
693 break;
694 default:
695 return null;
696 }
697 element.setAttributes(currentTag.getAttributes());
698 Tag nextTag = tagReader.readTag();
699 if (nextTag == null) {
700 throw new IOException("interrupted mid tag");
701 }
702 while (!nextTag.isEnd(element.getName())) {
703 if (!nextTag.isNo()) {
704 final Element child = tagReader.readElement(nextTag);
705 final String type = currentTag.getAttribute("type");
706 if (packetType == PACKET_IQ
707 && "jingle".equals(child.getName())
708 && ("set".equalsIgnoreCase(type) || "get"
709 .equalsIgnoreCase(type))) {
710 element = new JinglePacket();
711 element.setAttributes(currentTag.getAttributes());
712 }
713 element.addChild(child);
714 }
715 nextTag = tagReader.readTag();
716 if (nextTag == null) {
717 throw new IOException("interrupted mid tag");
718 }
719 }
720 if (stanzasReceived == Integer.MAX_VALUE) {
721 resetStreamId();
722 throw new IOException("time to restart the session. cant handle >2 billion pcks");
723 }
724 ++stanzasReceived;
725 lastPacketReceived = SystemClock.elapsedRealtime();
726 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
727 Log.d(Config.LOGTAG,"[background stanza] "+element);
728 }
729 return element;
730 }
731
732 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
733 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
734
735 if (packet.getId() == null) {
736 return; // an iq packet without id is definitely invalid
737 }
738
739 if (packet instanceof JinglePacket) {
740 if (this.jingleListener != null) {
741 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
742 }
743 } else {
744 OnIqPacketReceived callback = null;
745 synchronized (this.packetCallbacks) {
746 if (packetCallbacks.containsKey(packet.getId())) {
747 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
748 // Packets to the server should have responses from the server
749 if (packetCallbackDuple.first.toServer(account)) {
750 if (packet.fromServer(account) || mServerIdentity == Identity.FACEBOOK) {
751 callback = packetCallbackDuple.second;
752 packetCallbacks.remove(packet.getId());
753 } else {
754 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
755 }
756 } else {
757 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
758 callback = packetCallbackDuple.second;
759 packetCallbacks.remove(packet.getId());
760 } else {
761 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
762 }
763 }
764 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
765 callback = this.unregisteredIqListener;
766 }
767 }
768 if (callback != null) {
769 callback.onIqPacketReceived(account,packet);
770 }
771 }
772 }
773
774 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
775 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
776 this.messageListener.onMessagePacketReceived(account, packet);
777 }
778
779 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
780 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
781 this.presenceListener.onPresencePacketReceived(account, packet);
782 }
783
784 private void sendStartTLS() throws IOException {
785 final Tag startTLS = Tag.empty("starttls");
786 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
787 tagWriter.writeTag(startTLS);
788 }
789
790
791
792 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
793 tagReader.readTag();
794 try {
795 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
796 final InetAddress address = socket == null ? null : socket.getInetAddress();
797
798 if (address == null) {
799 throw new IOException("could not setup ssl");
800 }
801
802 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
803
804 if (sslSocket == null) {
805 throw new IOException("could not initialize ssl socket");
806 }
807
808 SSLSocketHelper.setSecurity(sslSocket);
809
810 if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
811 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
812 throw new SecurityException();
813 }
814 tagReader.setInputStream(sslSocket.getInputStream());
815 tagWriter.setOutputStream(sslSocket.getOutputStream());
816 sendStartStream();
817 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
818 features.encryptionEnabled = true;
819 final Tag tag = tagReader.readTag();
820 if (tag != null && tag.isStart("stream")) {
821 processStream();
822 } else {
823 throw new IOException("server didn't restart stream after STARTTLS");
824 }
825 sslSocket.close();
826 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
827 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
828 throw new SecurityException();
829 }
830 }
831
832 private void processStreamFeatures(final Tag currentTag)
833 throws XmlPullParserException, IOException {
834 this.streamFeatures = tagReader.readElement(currentTag);
835 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
836 sendStartTLS();
837 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
838 if (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS) {
839 sendRegistryRequest();
840 } else {
841 throw new IncompatibleServerException();
842 }
843 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
844 throw new RegistrationNotSupportedException();
845 } else if (this.streamFeatures.hasChild("mechanisms")
846 && shouldAuthenticate
847 && (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS)) {
848 authenticate();
849 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
850 if (Config.EXTENDED_SM_LOGGING) {
851 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
852 }
853 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
854 this.tagWriter.writeStanzaAsync(resume);
855 } else if (needsBinding) {
856 if (this.streamFeatures.hasChild("bind")) {
857 sendBindRequest();
858 } else {
859 throw new IncompatibleServerException();
860 }
861 }
862 }
863
864 private void authenticate() throws IOException {
865 final List<String> mechanisms = extractMechanisms(streamFeatures
866 .findChild("mechanisms"));
867 final Element auth = new Element("auth");
868 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
869 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
870 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
871 } else if (mechanisms.contains("SCRAM-SHA-1")) {
872 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
873 } else if (mechanisms.contains("PLAIN")) {
874 saslMechanism = new Plain(tagWriter, account);
875 } else if (mechanisms.contains("DIGEST-MD5")) {
876 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
877 } else if (mechanisms.contains("ANONYMOUS")) {
878 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
879 }
880 if (saslMechanism != null) {
881 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
882 if (pinnedMechanism > saslMechanism.getPriority()) {
883 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
884 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
885 ") than pinned priority (" + pinnedMechanism +
886 "). Possible downgrade attack?");
887 throw new SecurityException();
888 }
889 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
890 auth.setAttribute("mechanism", saslMechanism.getMechanism());
891 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
892 auth.setContent(saslMechanism.getClientFirstMessage());
893 }
894 tagWriter.writeElement(auth);
895 } else {
896 throw new IncompatibleServerException();
897 }
898 }
899
900 private List<String> extractMechanisms(final Element stream) {
901 final ArrayList<String> mechanisms = new ArrayList<>(stream
902 .getChildren().size());
903 for (final Element child : stream.getChildren()) {
904 mechanisms.add(child.getContent());
905 }
906 return mechanisms;
907 }
908
909 private void sendRegistryRequest() {
910 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
911 register.query("jabber:iq:register");
912 register.setTo(account.getServer());
913 sendUnmodifiedIqPacket(register, new OnIqPacketReceived() {
914
915 @Override
916 public void onIqPacketReceived(final Account account, final IqPacket packet) {
917 boolean failed = false;
918 if (packet.getType() == IqPacket.TYPE.RESULT
919 && packet.query().hasChild("username")
920 && (packet.query().hasChild("password"))) {
921 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
922 final Element username = new Element("username").setContent(account.getUsername());
923 final Element password = new Element("password").setContent(account.getPassword());
924 register.query("jabber:iq:register").addChild(username);
925 register.query().addChild(password);
926 register.setFrom(account.getJid().toBareJid());
927 sendUnmodifiedIqPacket(register, registrationResponseListener);
928 } else if (packet.getType() == IqPacket.TYPE.RESULT
929 && (packet.query().hasChild("x", "jabber:x:data"))) {
930 final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
931 final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
932 final String id = packet.getId();
933
934 Bitmap captcha = null;
935 if (blob != null) {
936 try {
937 final String base64Blob = blob.getContent();
938 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
939 InputStream stream = new ByteArrayInputStream(strBlob);
940 captcha = BitmapFactory.decodeStream(stream);
941 } catch (Exception e) {
942 //ignored
943 }
944 } else {
945 try {
946 Field url = data.getFieldByName("url");
947 String urlString = url.findChildContent("value");
948 URL uri = new URL(urlString);
949 captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
950 } catch (IOException e) {
951 Log.e(Config.LOGTAG, e.toString());
952 }
953 }
954
955 if (captcha != null) {
956 failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
957 }
958 } else {
959 failed = true;
960 }
961
962 if (failed) {
963 final Element instructions = packet.query().findChild("instructions");
964 setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
965 }
966 }
967 });
968 }
969
970 private void setAccountCreationFailed(String instructions) {
971 changeStatus(Account.State.REGISTRATION_FAILED);
972 disconnect(true);
973 Log.d(Config.LOGTAG, account.getJid().toBareJid()
974 + ": could not register. instructions are"
975 + instructions);
976 }
977
978 public void resetEverything() {
979 resetAttemptCount(true);
980 resetStreamId();
981 clearIqCallbacks();
982 mStanzaQueue.clear();
983 synchronized (this.disco) {
984 disco.clear();
985 }
986 }
987
988 private void sendBindRequest() {
989 while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
990 try {
991 Thread.sleep(500);
992 } catch (final InterruptedException ignored) {
993 }
994 }
995 needsBinding = false;
996 clearIqCallbacks();
997 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
998 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
999 .addChild("resource").setContent(account.getResource());
1000 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
1001 @Override
1002 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1003 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1004 return;
1005 }
1006 final Element bind = packet.findChild("bind");
1007 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1008 final Element jid = bind.findChild("jid");
1009 if (jid != null && jid.getContent() != null) {
1010 try {
1011 if (account.setJid(Jid.fromString(jid.getContent()))) {
1012 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": bare jid changed during bind. updating database");
1013 mXmppConnectionService.databaseBackend.updateAccount(account);
1014 }
1015 if (streamFeatures.hasChild("session")
1016 && !streamFeatures.findChild("session").hasChild("optional")) {
1017 sendStartSession();
1018 } else {
1019 sendPostBindInitialization();
1020 }
1021 return;
1022 } catch (final InvalidJidException e) {
1023 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server reported invalid jid ("+jid.getContent()+") on bind");
1024 }
1025 } else {
1026 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1027 }
1028 } else {
1029 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1030 }
1031 forceCloseSocket();
1032 changeStatus(Account.State.BIND_FAILURE);
1033 }
1034 });
1035 }
1036
1037 private void clearIqCallbacks() {
1038 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1039 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1040 synchronized (this.packetCallbacks) {
1041 if (this.packetCallbacks.size() == 0) {
1042 return;
1043 }
1044 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
1045 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1046 while (iterator.hasNext()) {
1047 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1048 callbacks.add(entry.second);
1049 iterator.remove();
1050 }
1051 }
1052 for(OnIqPacketReceived callback : callbacks) {
1053 callback.onIqPacketReceived(account,failurePacket);
1054 }
1055 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1056 }
1057
1058 public void sendDiscoTimeout() {
1059 if (mWaitForDisco.compareAndSet(true, false)) {
1060 finalizeBind();
1061 }
1062 }
1063
1064 private void sendStartSession() {
1065 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending legacy session to outdated server");
1066 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1067 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1068 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
1069 @Override
1070 public void onIqPacketReceived(Account account, IqPacket packet) {
1071 if (packet.getType() == IqPacket.TYPE.RESULT) {
1072 sendPostBindInitialization();
1073 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1074 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
1075 disconnect(true);
1076 }
1077 }
1078 });
1079 }
1080
1081 private void sendPostBindInitialization() {
1082 smVersion = 0;
1083 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1084 smVersion = 3;
1085 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1086 smVersion = 2;
1087 }
1088 if (smVersion != 0) {
1089 synchronized (this.mStanzaQueue) {
1090 final EnablePacket enable = new EnablePacket(smVersion);
1091 tagWriter.writeStanzaAsync(enable);
1092 stanzasSent = 0;
1093 mStanzaQueue.clear();
1094 }
1095 }
1096 features.carbonsEnabled = false;
1097 features.blockListRequested = false;
1098 synchronized (this.disco) {
1099 this.disco.clear();
1100 }
1101 mPendingServiceDiscoveries.set(0);
1102 mWaitForDisco.set(mServerIdentity != Identity.NIMBUZZ && smVersion != 0);
1103 lastDiscoStarted = SystemClock.elapsedRealtime();
1104 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
1105 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1106 Element caps = streamFeatures.findChild("c");
1107 final String hash = caps == null ? null : caps.getAttribute("hash");
1108 final String ver = caps == null ? null : caps.getAttribute("ver");
1109 ServiceDiscoveryResult discoveryResult = null;
1110 if (hash != null && ver != null) {
1111 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1112 }
1113 if (discoveryResult == null) {
1114 sendServiceDiscoveryInfo(account.getServer());
1115 } else {
1116 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server caps came from cache");
1117 disco.put(account.getServer(), discoveryResult);
1118 }
1119 sendServiceDiscoveryInfo(account.getJid().toBareJid());
1120 sendServiceDiscoveryItems(account.getServer());
1121
1122 if (!mWaitForDisco.get()) {
1123 finalizeBind();
1124 }
1125 this.lastSessionStarted = SystemClock.elapsedRealtime();
1126 }
1127
1128 private void sendServiceDiscoveryInfo(final Jid jid) {
1129 mPendingServiceDiscoveries.incrementAndGet();
1130 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1131 iq.setTo(jid);
1132 iq.query("http://jabber.org/protocol/disco#info");
1133 this.sendIqPacket(iq, new OnIqPacketReceived() {
1134
1135 @Override
1136 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1137 if (packet.getType() == IqPacket.TYPE.RESULT) {
1138 boolean advancedStreamFeaturesLoaded;
1139 synchronized (XmppConnection.this.disco) {
1140 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1141 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1142 if (mServerIdentity == Identity.UNKNOWN && id.getType().equals("im") &&
1143 id.getCategory().equals("server") && id.getName() != null &&
1144 jid.equals(account.getServer())) {
1145 switch (id.getName()) {
1146 case "Prosody":
1147 mServerIdentity = Identity.PROSODY;
1148 break;
1149 case "ejabberd":
1150 mServerIdentity = Identity.EJABBERD;
1151 break;
1152 case "Slack-XMPP":
1153 mServerIdentity = Identity.SLACK;
1154 break;
1155 }
1156 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server name: " + id.getName());
1157 }
1158 }
1159 if (jid.equals(account.getServer())) {
1160 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1161 }
1162 disco.put(jid, result);
1163 advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
1164 && disco.containsKey(account.getJid().toBareJid());
1165 }
1166 if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
1167 enableAdvancedStreamFeatures();
1168 }
1169 } else {
1170 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
1171 }
1172 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1173 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1174 && mWaitForDisco.compareAndSet(true, false)) {
1175 finalizeBind();
1176 }
1177 }
1178 }
1179 });
1180 }
1181
1182 private void finalizeBind() {
1183 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
1184 if (bindListener != null) {
1185 bindListener.onBind(account);
1186 }
1187 changeStatus(Account.State.ONLINE);
1188 }
1189
1190 private void enableAdvancedStreamFeatures() {
1191 if (getFeatures().carbons() && !features.carbonsEnabled) {
1192 sendEnableCarbons();
1193 }
1194 if (getFeatures().blocking() && !features.blockListRequested) {
1195 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
1196 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1197 }
1198 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1199 listener.onAdvancedStreamFeaturesAvailable(account);
1200 }
1201 }
1202
1203 private void sendServiceDiscoveryItems(final Jid server) {
1204 mPendingServiceDiscoveries.incrementAndGet();
1205 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1206 iq.setTo(server.toDomainJid());
1207 iq.query("http://jabber.org/protocol/disco#items");
1208 this.sendIqPacket(iq, new OnIqPacketReceived() {
1209
1210 @Override
1211 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1212 if (packet.getType() == IqPacket.TYPE.RESULT) {
1213 final List<Element> elements = packet.query().getChildren();
1214 for (final Element element : elements) {
1215 if (element.getName().equals("item")) {
1216 final Jid jid = element.getAttributeAsJid("jid");
1217 if (jid != null && !jid.equals(account.getServer())) {
1218 sendServiceDiscoveryInfo(jid);
1219 }
1220 }
1221 }
1222 } else {
1223 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
1224 }
1225 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1226 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1227 && mWaitForDisco.compareAndSet(true, false)) {
1228 finalizeBind();
1229 }
1230 }
1231 }
1232 });
1233 }
1234
1235 private void sendEnableCarbons() {
1236 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1237 iq.addChild("enable", "urn:xmpp:carbons:2");
1238 this.sendIqPacket(iq, new OnIqPacketReceived() {
1239
1240 @Override
1241 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1242 if (!packet.hasChild("error")) {
1243 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1244 + ": successfully enabled carbons");
1245 features.carbonsEnabled = true;
1246 } else {
1247 Log.d(Config.LOGTAG, account.getJid().toBareJid()
1248 + ": error enableing carbons " + packet.toString());
1249 }
1250 }
1251 });
1252 }
1253
1254 private void processStreamError(final Tag currentTag)
1255 throws XmlPullParserException, IOException {
1256 final Element streamError = tagReader.readElement(currentTag);
1257 if (streamError == null) {
1258 return;
1259 }
1260 if (streamError.hasChild("conflict")) {
1261 final String resource = account.getResource().split("\\.")[0];
1262 account.setResource(resource + "." + nextRandomId());
1263 Log.d(Config.LOGTAG,
1264 account.getJid().toBareJid() + ": switching resource due to conflict ("
1265 + account.getResource() + ")");
1266 throw new IOException();
1267 } else if (streamError.hasChild("host-unknown")) {
1268 throw new StreamErrorHostUnknown();
1269 } else if (streamError.hasChild("policy-violation")) {
1270 throw new StreamErrorPolicyViolation();
1271 } else {
1272 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
1273 throw new StreamError();
1274 }
1275 }
1276
1277 private void sendStartStream() throws IOException {
1278 final Tag stream = Tag.start("stream:stream");
1279 stream.setAttribute("to", account.getServer().toString());
1280 stream.setAttribute("version", "1.0");
1281 stream.setAttribute("xml:lang", "en");
1282 stream.setAttribute("xmlns", "jabber:client");
1283 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1284 tagWriter.writeTag(stream);
1285 }
1286
1287 private String nextRandomId() {
1288 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
1289 }
1290
1291 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1292 packet.setFrom(account.getJid());
1293 return this.sendUnmodifiedIqPacket(packet, callback);
1294 }
1295
1296 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1297 if (packet.getId() == null) {
1298 final String id = nextRandomId();
1299 packet.setAttribute("id", id);
1300 }
1301 if (callback != null) {
1302 synchronized (this.packetCallbacks) {
1303 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1304 }
1305 }
1306 this.sendPacket(packet);
1307 return packet.getId();
1308 }
1309
1310 public void sendMessagePacket(final MessagePacket packet) {
1311 this.sendPacket(packet);
1312 }
1313
1314 public void sendPresencePacket(final PresencePacket packet) {
1315 this.sendPacket(packet);
1316 }
1317
1318 private synchronized void sendPacket(final AbstractStanza packet) {
1319 if (stanzasSent == Integer.MAX_VALUE) {
1320 resetStreamId();
1321 disconnect(true);
1322 return;
1323 }
1324 synchronized (this.mStanzaQueue) {
1325 tagWriter.writeStanzaAsync(packet);
1326 if (packet instanceof AbstractAcknowledgeableStanza) {
1327 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1328 ++stanzasSent;
1329 this.mStanzaQueue.append(stanzasSent, stanza);
1330 if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
1331 if (Config.EXTENDED_SM_LOGGING) {
1332 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1333 }
1334 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1335 }
1336 }
1337 }
1338 }
1339
1340 public void sendPing() {
1341 if (!r()) {
1342 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1343 iq.setFrom(account.getJid());
1344 iq.addChild("ping", "urn:xmpp:ping");
1345 this.sendIqPacket(iq, null);
1346 }
1347 this.lastPingSent = SystemClock.elapsedRealtime();
1348 }
1349
1350 public void setOnMessagePacketReceivedListener(
1351 final OnMessagePacketReceived listener) {
1352 this.messageListener = listener;
1353 }
1354
1355 public void setOnUnregisteredIqPacketReceivedListener(
1356 final OnIqPacketReceived listener) {
1357 this.unregisteredIqListener = listener;
1358 }
1359
1360 public void setOnPresencePacketReceivedListener(
1361 final OnPresencePacketReceived listener) {
1362 this.presenceListener = listener;
1363 }
1364
1365 public void setOnJinglePacketReceivedListener(
1366 final OnJinglePacketReceived listener) {
1367 this.jingleListener = listener;
1368 }
1369
1370 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1371 this.statusListener = listener;
1372 }
1373
1374 public void setOnBindListener(final OnBindListener listener) {
1375 this.bindListener = listener;
1376 }
1377
1378 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1379 this.acknowledgedListener = listener;
1380 }
1381
1382 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1383 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1384 this.advancedStreamFeaturesLoadedListeners.add(listener);
1385 }
1386 }
1387
1388 private void forceCloseSocket() {
1389 if (socket != null) {
1390 try {
1391 socket.close();
1392 } catch (IOException e) {
1393 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception "+e.getMessage()+" during force close");
1394 }
1395 } else {
1396 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": socket was null during force close");
1397 }
1398 }
1399
1400 public void interrupt() {
1401 Thread.currentThread().interrupt();
1402 }
1403
1404 public void disconnect(final boolean force) {
1405 interrupt();
1406 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
1407 if (force) {
1408 tagWriter.forceClose();
1409 forceCloseSocket();
1410 } else {
1411 if (tagWriter.isActive()) {
1412 tagWriter.finish();
1413 try {
1414 int i = 0;
1415 boolean warned = false;
1416 while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
1417 if (!warned) {
1418 Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
1419 warned = true;
1420 }
1421 try {
1422 Thread.sleep(200);
1423 } catch(InterruptedException e) {
1424 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sleep interrupted");
1425 }
1426 i++;
1427 }
1428 if (warned) {
1429 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
1430 }
1431 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
1432 tagWriter.writeTag(Tag.end("stream:stream"));
1433 } catch (final IOException e) {
1434 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
1435 } finally {
1436 forceCloseSocket();
1437 }
1438 }
1439 }
1440 }
1441
1442 public void resetStreamId() {
1443 this.streamId = null;
1444 }
1445
1446 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1447 synchronized (this.disco) {
1448 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1449 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1450 if (cursor.getValue().getFeatures().contains(feature)) {
1451 items.add(cursor);
1452 }
1453 }
1454 return items;
1455 }
1456 }
1457
1458 public Jid findDiscoItemByFeature(final String feature) {
1459 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1460 if (items.size() >= 1) {
1461 return items.get(0).getKey();
1462 }
1463 return null;
1464 }
1465
1466 public boolean r() {
1467 if (getFeatures().sm()) {
1468 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1469 return true;
1470 } else {
1471 return false;
1472 }
1473 }
1474
1475 public String getMucServer() {
1476 synchronized (this.disco) {
1477 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1478 final ServiceDiscoveryResult value = cursor.getValue();
1479 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1480 && !value.getFeatures().contains("jabber:iq:gateway")
1481 && !value.hasIdentity("conference", "irc")) {
1482 return cursor.getKey().toString();
1483 }
1484 }
1485 }
1486 return null;
1487 }
1488
1489 public int getTimeToNextAttempt() {
1490 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1491 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1492 return interval - secondsSinceLast;
1493 }
1494
1495 public int getAttempt() {
1496 return this.attempt;
1497 }
1498
1499 public Features getFeatures() {
1500 return this.features;
1501 }
1502
1503 public long getLastSessionEstablished() {
1504 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1505 return System.currentTimeMillis() - diff;
1506 }
1507
1508 public long getLastConnect() {
1509 return this.lastConnect;
1510 }
1511
1512 public long getLastPingSent() {
1513 return this.lastPingSent;
1514 }
1515
1516 public long getLastDiscoStarted() {
1517 return this.lastDiscoStarted;
1518 }
1519 public long getLastPacketReceived() {
1520 return this.lastPacketReceived;
1521 }
1522
1523 public void sendActive() {
1524 this.sendPacket(new ActivePacket());
1525 }
1526
1527 public void sendInactive() {
1528 this.sendPacket(new InactivePacket());
1529 }
1530
1531 public void resetAttemptCount(boolean resetConnectTime) {
1532 this.attempt = 0;
1533 if (resetConnectTime) {
1534 this.lastConnect = 0;
1535 }
1536 }
1537
1538 public void setInteractive(boolean interactive) {
1539 this.mInteractive = interactive;
1540 }
1541
1542 public Identity getServerIdentity() {
1543 return mServerIdentity;
1544 }
1545
1546 private class UnauthorizedException extends IOException {
1547
1548 }
1549
1550 private class SecurityException extends IOException {
1551
1552 }
1553
1554 private class IncompatibleServerException extends IOException {
1555
1556 }
1557
1558 private class StreamErrorHostUnknown extends StreamError {
1559
1560 }
1561
1562 private class StreamErrorPolicyViolation extends StreamError {
1563
1564 }
1565
1566 private class StreamError extends IOException {
1567
1568 }
1569
1570 private class PaymentRequiredException extends IOException {
1571
1572 }
1573
1574 private class RegistrationNotSupportedException extends IOException {
1575
1576 }
1577
1578 public enum Identity {
1579 FACEBOOK,
1580 SLACK,
1581 EJABBERD,
1582 PROSODY,
1583 NIMBUZZ,
1584 UNKNOWN
1585 }
1586
1587 public class Features {
1588 XmppConnection connection;
1589 private boolean carbonsEnabled = false;
1590 private boolean encryptionEnabled = false;
1591 private boolean blockListRequested = false;
1592
1593 public Features(final XmppConnection connection) {
1594 this.connection = connection;
1595 }
1596
1597 private boolean hasDiscoFeature(final Jid server, final String feature) {
1598 synchronized (XmppConnection.this.disco) {
1599 return connection.disco.containsKey(server) &&
1600 connection.disco.get(server).getFeatures().contains(feature);
1601 }
1602 }
1603
1604 public boolean carbons() {
1605 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1606 }
1607
1608 public boolean blocking() {
1609 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1610 }
1611
1612 public boolean spamReporting() {
1613 return hasDiscoFeature(account.getServer(), "urn:xmpp:reporting:reason:spam:0");
1614 }
1615
1616 public boolean register() {
1617 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1618 }
1619
1620 public boolean sm() {
1621 return streamId != null
1622 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1623 }
1624
1625 public boolean csi() {
1626 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1627 }
1628
1629 public boolean pep() {
1630 synchronized (XmppConnection.this.disco) {
1631 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1632 return info != null && info.hasIdentity("pubsub", "pep");
1633 }
1634 }
1635
1636 public boolean pepPersistent() {
1637 synchronized (XmppConnection.this.disco) {
1638 ServiceDiscoveryResult info = disco.get(account.getJid().toBareJid());
1639 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1640 }
1641 }
1642
1643 public boolean mam() {
1644 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")
1645 || hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1646 }
1647
1648 public boolean push() {
1649 return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:push:0")
1650 || hasDiscoFeature(account.getServer(), "urn:xmpp:push:0");
1651 }
1652
1653 public boolean rosterVersioning() {
1654 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1655 }
1656
1657 public void setBlockListRequested(boolean value) {
1658 this.blockListRequested = value;
1659 }
1660
1661 public boolean httpUpload(long filesize) {
1662 if (Config.DISABLE_HTTP_UPLOAD) {
1663 return false;
1664 } else {
1665 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1666 if (items.size() > 0) {
1667 try {
1668 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1669 if(filesize <= maxsize) {
1670 return true;
1671 } else {
1672 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": http upload is not available for files with size "+filesize+" (max is "+maxsize+")");
1673 return false;
1674 }
1675 } catch (Exception e) {
1676 return true;
1677 }
1678 } else {
1679 return false;
1680 }
1681 }
1682 }
1683
1684 public long getMaxHttpUploadSize() {
1685 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD);
1686 if (items.size() > 0) {
1687 try {
1688 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(Xmlns.HTTP_UPLOAD, "max-file-size"));
1689 } catch (Exception e) {
1690 return -1;
1691 }
1692 } else {
1693 return -1;
1694 }
1695 }
1696
1697 public boolean stanzaIds() {
1698 return hasDiscoFeature(account.getJid().toBareJid(),Xmlns.STANZA_IDS);
1699 }
1700 }
1701
1702 private IqGenerator getIqGenerator() {
1703 return mXmppConnectionService.getIqGenerator();
1704 }
1705}