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