1package eu.siacs.conversations.xmpp;
2
3import android.content.Context;
4import android.content.SharedPreferences;
5import android.os.Bundle;
6import android.os.Parcelable;
7import android.os.PowerManager;
8import android.os.PowerManager.WakeLock;
9import android.os.SystemClock;
10import android.preference.PreferenceManager;
11import android.util.Log;
12import android.util.SparseArray;
13
14import org.apache.http.conn.ssl.StrictHostnameVerifier;
15import org.xmlpull.v1.XmlPullParserException;
16
17import java.io.IOException;
18import java.io.InputStream;
19import java.io.OutputStream;
20import java.math.BigInteger;
21import java.net.InetSocketAddress;
22import java.net.Socket;
23import java.net.UnknownHostException;
24import java.security.KeyManagementException;
25import java.security.NoSuchAlgorithmException;
26import java.util.ArrayList;
27import java.util.Arrays;
28import java.util.HashMap;
29import java.util.Hashtable;
30import java.util.LinkedList;
31import java.util.List;
32import java.util.Map.Entry;
33
34import javax.net.ssl.HostnameVerifier;
35import javax.net.ssl.SSLContext;
36import javax.net.ssl.SSLSocket;
37import javax.net.ssl.SSLSocketFactory;
38import javax.net.ssl.X509TrustManager;
39
40import eu.siacs.conversations.Config;
41import eu.siacs.conversations.entities.Account;
42import eu.siacs.conversations.services.XmppConnectionService;
43import eu.siacs.conversations.utils.CryptoHelper;
44import eu.siacs.conversations.utils.DNSHelper;
45import eu.siacs.conversations.utils.zlib.ZLibInputStream;
46import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
47import eu.siacs.conversations.xml.Element;
48import eu.siacs.conversations.xml.Tag;
49import eu.siacs.conversations.xml.TagWriter;
50import eu.siacs.conversations.xml.XmlReader;
51import eu.siacs.conversations.xmpp.jid.InvalidJidException;
52import eu.siacs.conversations.xmpp.jid.Jid;
53import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
54import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
55import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
56import eu.siacs.conversations.xmpp.stanzas.IqPacket;
57import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
58import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
59import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
60import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
61import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
62import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
63import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
64import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
65
66public class XmppConnection implements Runnable {
67
68 private static final int PACKET_IQ = 0;
69 private static final int PACKET_MESSAGE = 1;
70 private static final int PACKET_PRESENCE = 2;
71 private final Context applicationContext;
72 protected Account account;
73 private WakeLock wakeLock;
74 private Socket socket;
75 private XmlReader tagReader;
76 private TagWriter tagWriter;
77 private Features features = new Features(this);
78 private boolean shouldBind = true;
79 private boolean shouldAuthenticate = true;
80 private Element streamFeatures;
81 private HashMap<String, List<String>> disco = new HashMap<>();
82
83 private String streamId = null;
84 private int smVersion = 3;
85 private SparseArray<String> messageReceipts = new SparseArray<>();
86
87 private boolean usingCompression = false;
88 private boolean usingEncryption = false;
89 private int stanzasReceived = 0;
90 private int stanzasSent = 0;
91 private long lastPaketReceived = 0;
92 private long lastPingSent = 0;
93 private long lastConnect = 0;
94 private long lastSessionStarted = 0;
95 private int attempt = 0;
96 private Hashtable<String, PacketReceived> packetCallbacks = new Hashtable<>();
97 private OnPresencePacketReceived presenceListener = null;
98 private OnJinglePacketReceived jingleListener = null;
99 private OnIqPacketReceived unregisteredIqListener = null;
100 private OnMessagePacketReceived messageListener = null;
101 private OnStatusChanged statusListener = null;
102 private OnBindListener bindListener = null;
103 private OnMessageAcknowledged acknowledgedListener = null;
104 private XmppConnectionService mXmppConnectionService = null;
105
106 public XmppConnection(Account account, XmppConnectionService service) {
107 this.account = account;
108 this.wakeLock = service.getPowerManager().newWakeLock(
109 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toString());
110 tagWriter = new TagWriter();
111 mXmppConnectionService = service;
112 applicationContext = service.getApplicationContext();
113 }
114
115 protected void changeStatus(int nextStatus) {
116 if (account.getStatus() != nextStatus) {
117 if ((nextStatus == Account.STATUS_OFFLINE)
118 && (account.getStatus() != Account.STATUS_CONNECTING)
119 && (account.getStatus() != Account.STATUS_ONLINE)
120 && (account.getStatus() != Account.STATUS_DISABLED)) {
121 return;
122 }
123 if (nextStatus == Account.STATUS_ONLINE) {
124 this.attempt = 0;
125 }
126 account.setStatus(nextStatus);
127 if (statusListener != null) {
128 statusListener.onStatusChanged(account);
129 }
130 }
131 }
132
133 protected void connect() {
134 Log.d(Config.LOGTAG, account.getJid().toString() + ": connecting");
135 usingCompression = false;
136 usingEncryption = false;
137 lastConnect = SystemClock.elapsedRealtime();
138 lastPingSent = SystemClock.elapsedRealtime();
139 this.attempt++;
140 try {
141 shouldAuthenticate = shouldBind = !account
142 .isOptionSet(Account.OPTION_REGISTER);
143 tagReader = new XmlReader(wakeLock);
144 tagWriter = new TagWriter();
145 packetCallbacks.clear();
146 this.changeStatus(Account.STATUS_CONNECTING);
147 Bundle result = DNSHelper.getSRVRecord(account.getServer());
148 ArrayList<Parcelable> values = result.getParcelableArrayList("values");
149 if ("timeout".equals(result.getString("error"))) {
150 Log.d(Config.LOGTAG, account.getJid().toString() + ": dns timeout");
151 this.changeStatus(Account.STATUS_OFFLINE);
152 return;
153 } else if (values != null) {
154 int i = 0;
155 boolean socketError = true;
156 while (socketError && values.size() > i) {
157 Bundle namePort = (Bundle) values.get(i);
158 try {
159 String srvRecordServer = namePort.getString("name");
160 int srvRecordPort = namePort.getInt("port");
161 String srvIpServer = namePort.getString("ipv4");
162 InetSocketAddress addr;
163 if (srvIpServer != null) {
164 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
165 Log.d(Config.LOGTAG, account.getJid().toString()
166 + ": using values from dns " + srvRecordServer
167 + "[" + srvIpServer + "]:" + srvRecordPort);
168 } else {
169 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
170 Log.d(Config.LOGTAG, account.getJid().toString()
171 + ": using values from dns "
172 + srvRecordServer + ":" + srvRecordPort);
173 }
174 socket = new Socket();
175 socket.connect(addr, 20000);
176 socketError = false;
177 } catch (UnknownHostException e) {
178 Log.d(Config.LOGTAG, account.getJid().toString() + ": " + e.getMessage());
179 i++;
180 } catch (IOException e) {
181 Log.d(Config.LOGTAG, account.getJid().toString() + ": " + e.getMessage());
182 i++;
183 }
184 }
185 if (socketError) {
186 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
187 if (wakeLock.isHeld()) {
188 try {
189 wakeLock.release();
190 } catch (final RuntimeException ignored) {
191 }
192 }
193 return;
194 }
195 } else if (result.containsKey("error")
196 && "nosrv".equals(result.getString("error", null))) {
197 socket = new Socket(account.getServer().getDomainpart(), 5222);
198 } else {
199 Log.d(Config.LOGTAG, account.getJid().toString()
200 + ": timeout in DNS resolution");
201 changeStatus(Account.STATUS_OFFLINE);
202 return;
203 }
204 OutputStream out = socket.getOutputStream();
205 tagWriter.setOutputStream(out);
206 InputStream in = socket.getInputStream();
207 tagReader.setInputStream(in);
208 tagWriter.beginDocument();
209 sendStartStream();
210 Tag nextTag;
211 while ((nextTag = tagReader.readTag()) != null) {
212 if (nextTag.isStart("stream")) {
213 processStream(nextTag);
214 break;
215 } else {
216 Log.d(Config.LOGTAG,
217 "found unexpected tag: " + nextTag.getName());
218 return;
219 }
220 }
221 if (socket.isConnected()) {
222 socket.close();
223 }
224 } catch (UnknownHostException e) {
225 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
226 if (wakeLock.isHeld()) {
227 try {
228 wakeLock.release();
229 } catch (final RuntimeException ignored) {
230 }
231 }
232 } catch (final IOException | XmlPullParserException e) {
233 Log.d(Config.LOGTAG, account.getJid().toString() + ": " + e.getMessage());
234 this.changeStatus(Account.STATUS_OFFLINE);
235 if (wakeLock.isHeld()) {
236 try {
237 wakeLock.release();
238 } catch (final RuntimeException ignored) {
239 }
240 }
241 } catch (NoSuchAlgorithmException e) {
242 Log.d(Config.LOGTAG, account.getJid().toString() + ": " + e.getMessage());
243 this.changeStatus(Account.STATUS_OFFLINE);
244 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
245 if (wakeLock.isHeld()) {
246 try {
247 wakeLock.release();
248 } catch (final RuntimeException ignored) {
249 }
250 }
251 }
252
253 }
254
255 @Override
256 public void run() {
257 connect();
258 }
259
260 private void processStream(final Tag currentTag) throws XmlPullParserException,
261 IOException, NoSuchAlgorithmException {
262 Tag nextTag = tagReader.readTag();
263 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
264 if (nextTag.isStart("error")) {
265 processStreamError(nextTag);
266 } else if (nextTag.isStart("features")) {
267 processStreamFeatures(nextTag);
268 } else if (nextTag.isStart("proceed")) {
269 switchOverToTls(nextTag);
270 } else if (nextTag.isStart("compressed")) {
271 switchOverToZLib(nextTag);
272 } else if (nextTag.isStart("success")) {
273 Log.d(Config.LOGTAG, account.getJid().toString() + ": logged in");
274 tagReader.readTag();
275 tagReader.reset();
276 sendStartStream();
277 processStream(tagReader.readTag());
278 break;
279 } else if (nextTag.isStart("failure")) {
280 tagReader.readElement(nextTag);
281 changeStatus(Account.STATUS_UNAUTHORIZED);
282 } else if (nextTag.isStart("challenge")) {
283 String challange = tagReader.readElement(nextTag).getContent();
284 Element response = new Element("response");
285 response.setAttribute("xmlns",
286 "urn:ietf:params:xml:ns:xmpp-sasl");
287 response.setContent(CryptoHelper.saslDigestMd5(account,
288 challange, mXmppConnectionService.getRNG()));
289 tagWriter.writeElement(response);
290 } else if (nextTag.isStart("enabled")) {
291 Element enabled = tagReader.readElement(nextTag);
292 if ("true".equals(enabled.getAttribute("resume"))) {
293 this.streamId = enabled.getAttribute("id");
294 Log.d(Config.LOGTAG, account.getJid().toString()
295 + ": stream managment(" + smVersion
296 + ") enabled (resumable)");
297 } else {
298 Log.d(Config.LOGTAG, account.getJid().toString()
299 + ": stream managment(" + smVersion + ") enabled");
300 }
301 this.lastSessionStarted = SystemClock.elapsedRealtime();
302 this.stanzasReceived = 0;
303 RequestPacket r = new RequestPacket(smVersion);
304 tagWriter.writeStanzaAsync(r);
305 } else if (nextTag.isStart("resumed")) {
306 lastPaketReceived = SystemClock.elapsedRealtime();
307 Element resumed = tagReader.readElement(nextTag);
308 String h = resumed.getAttribute("h");
309 try {
310 int serverCount = Integer.parseInt(h);
311 if (serverCount != stanzasSent) {
312 Log.d(Config.LOGTAG, account.getJid().toString()
313 + ": session resumed with lost packages");
314 stanzasSent = serverCount;
315 } else {
316 Log.d(Config.LOGTAG, account.getJid().toString()
317 + ": session resumed");
318 }
319 if (acknowledgedListener != null) {
320 for (int i = 0; i < messageReceipts.size(); ++i) {
321 if (serverCount >= messageReceipts.keyAt(i)) {
322 acknowledgedListener.onMessageAcknowledged(
323 account, messageReceipts.valueAt(i));
324 }
325 }
326 }
327 messageReceipts.clear();
328 } catch (final NumberFormatException ignored) {
329
330 }
331 sendInitialPing();
332
333 } else if (nextTag.isStart("r")) {
334 tagReader.readElement(nextTag);
335 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
336 tagWriter.writeStanzaAsync(ack);
337 } else if (nextTag.isStart("a")) {
338 Element ack = tagReader.readElement(nextTag);
339 lastPaketReceived = SystemClock.elapsedRealtime();
340 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
341 String msgId = this.messageReceipts.get(serverSequence);
342 if (msgId != null) {
343 if (this.acknowledgedListener != null) {
344 this.acknowledgedListener.onMessageAcknowledged(
345 account, msgId);
346 }
347 this.messageReceipts.remove(serverSequence);
348 }
349 } else if (nextTag.isStart("failed")) {
350 tagReader.readElement(nextTag);
351 Log.d(Config.LOGTAG, account.getJid().toString() + ": resumption failed");
352 streamId = null;
353 if (account.getStatus() != Account.STATUS_ONLINE) {
354 sendBindRequest();
355 }
356 } else if (nextTag.isStart("iq")) {
357 processIq(nextTag);
358 } else if (nextTag.isStart("message")) {
359 processMessage(nextTag);
360 } else if (nextTag.isStart("presence")) {
361 processPresence(nextTag);
362 }
363 nextTag = tagReader.readTag();
364 }
365 if (account.getStatus() == Account.STATUS_ONLINE) {
366 account.setStatus(Account.STATUS_OFFLINE);
367 if (statusListener != null) {
368 statusListener.onStatusChanged(account);
369 }
370 }
371 }
372
373 private void sendInitialPing() {
374 Log.d(Config.LOGTAG, account.getJid().toString() + ": sending intial ping");
375 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
376 iq.setFrom(account.getFullJid());
377 iq.addChild("ping", "urn:xmpp:ping");
378 this.sendIqPacket(iq, new OnIqPacketReceived() {
379
380 @Override
381 public void onIqPacketReceived(Account account, IqPacket packet) {
382 Log.d(Config.LOGTAG, account.getJid().toString()
383 + ": online with resource " + account.getResource());
384 changeStatus(Account.STATUS_ONLINE);
385 }
386 });
387 }
388
389 private Element processPacket(Tag currentTag, int packetType)
390 throws XmlPullParserException, IOException {
391 Element element;
392 switch (packetType) {
393 case PACKET_IQ:
394 element = new IqPacket();
395 break;
396 case PACKET_MESSAGE:
397 element = new MessagePacket();
398 break;
399 case PACKET_PRESENCE:
400 element = new PresencePacket();
401 break;
402 default:
403 return null;
404 }
405 element.setAttributes(currentTag.getAttributes());
406 Tag nextTag = tagReader.readTag();
407 if (nextTag == null) {
408 throw new IOException("interrupted mid tag");
409 }
410 while (!nextTag.isEnd(element.getName())) {
411 if (!nextTag.isNo()) {
412 Element child = tagReader.readElement(nextTag);
413 String type = currentTag.getAttribute("type");
414 if (packetType == PACKET_IQ
415 && "jingle".equals(child.getName())
416 && ("set".equalsIgnoreCase(type) || "get"
417 .equalsIgnoreCase(type))) {
418 element = new JinglePacket();
419 element.setAttributes(currentTag.getAttributes());
420 }
421 element.addChild(child);
422 }
423 nextTag = tagReader.readTag();
424 if (nextTag == null) {
425 throw new IOException("interrupted mid tag");
426 }
427 }
428 ++stanzasReceived;
429 lastPaketReceived = SystemClock.elapsedRealtime();
430 return element;
431 }
432
433 private void processIq(Tag currentTag) throws XmlPullParserException,
434 IOException {
435 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
436
437 if (packet.getId() == null) {
438 return; // an iq packet without id is definitely invalid
439 }
440
441 if (packet instanceof JinglePacket) {
442 if (this.jingleListener != null) {
443 this.jingleListener.onJinglePacketReceived(account,
444 (JinglePacket) packet);
445 }
446 } else {
447 if (packetCallbacks.containsKey(packet.getId())) {
448 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
449 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
450 .onIqPacketReceived(account, packet);
451 }
452
453 packetCallbacks.remove(packet.getId());
454 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
455 .getType() == IqPacket.TYPE_SET)
456 && this.unregisteredIqListener != null) {
457 this.unregisteredIqListener.onIqPacketReceived(account, packet);
458 }
459 }
460 }
461
462 private void processMessage(Tag currentTag) throws XmlPullParserException,
463 IOException {
464 MessagePacket packet = (MessagePacket) processPacket(currentTag,
465 PACKET_MESSAGE);
466 String id = packet.getAttribute("id");
467 if ((id != null) && (packetCallbacks.containsKey(id))) {
468 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
469 ((OnMessagePacketReceived) packetCallbacks.get(id))
470 .onMessagePacketReceived(account, packet);
471 }
472 packetCallbacks.remove(id);
473 } else if (this.messageListener != null) {
474 this.messageListener.onMessagePacketReceived(account, packet);
475 }
476 }
477
478 private void processPresence(Tag currentTag) throws XmlPullParserException,
479 IOException {
480 PresencePacket packet = (PresencePacket) processPacket(currentTag,
481 PACKET_PRESENCE);
482 String id = packet.getAttribute("id");
483 if ((id != null) && (packetCallbacks.containsKey(id))) {
484 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
485 ((OnPresencePacketReceived) packetCallbacks.get(id))
486 .onPresencePacketReceived(account, packet);
487 }
488 packetCallbacks.remove(id);
489 } else if (this.presenceListener != null) {
490 this.presenceListener.onPresencePacketReceived(account, packet);
491 }
492 }
493
494 private void sendCompressionZlib() throws IOException {
495 Element compress = new Element("compress");
496 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
497 compress.addChild("method").setContent("zlib");
498 tagWriter.writeElement(compress);
499 }
500
501 private void switchOverToZLib(final Tag currentTag)
502 throws XmlPullParserException, IOException,
503 NoSuchAlgorithmException {
504 tagReader.readTag(); // read tag close
505 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
506 .getOutputStream()));
507 tagReader
508 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
509
510 sendStartStream();
511 Log.d(Config.LOGTAG, account.getJid() + ": compression enabled");
512 usingCompression = true;
513 processStream(tagReader.readTag());
514 }
515
516 private void sendStartTLS() throws IOException {
517 Tag startTLS = Tag.empty("starttls");
518 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
519 tagWriter.writeTag(startTLS);
520 }
521
522 private SharedPreferences getPreferences() {
523 return PreferenceManager
524 .getDefaultSharedPreferences(applicationContext);
525 }
526
527 private boolean enableLegacySSL() {
528 return getPreferences().getBoolean("enable_legacy_ssl", false);
529 }
530
531 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException,
532 IOException {
533 tagReader.readTag();
534 try {
535 SSLContext sc = SSLContext.getInstance("TLS");
536 sc.init(null,
537 new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},
538 mXmppConnectionService.getRNG());
539 SSLSocketFactory factory = sc.getSocketFactory();
540
541 if (factory == null) {
542 throw new IOException("SSLSocketFactory was null");
543 }
544
545 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
546
547 if (socket == null) {
548 throw new IOException("socket was null");
549 }
550 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,
551 socket.getInetAddress().getHostAddress(), socket.getPort(),
552 true);
553
554 // Support all protocols except legacy SSL.
555 // The min SDK version prevents us having to worry about SSLv2. In
556 // future, this may be true of SSLv3 as well.
557 final String[] supportProtocols;
558 if (enableLegacySSL()) {
559 supportProtocols = sslSocket.getSupportedProtocols();
560 } else {
561 final List<String> supportedProtocols = new LinkedList<>(
562 Arrays.asList(sslSocket.getSupportedProtocols()));
563 supportedProtocols.remove("SSLv3");
564 supportProtocols = new String[supportedProtocols.size()];
565 supportedProtocols.toArray(supportProtocols);
566 }
567 sslSocket.setEnabledProtocols(supportProtocols);
568
569 if (verifier != null
570 && !verifier.verify(account.getServer().getDomainpart(),
571 sslSocket.getSession())) {
572 sslSocket.close();
573 throw new IOException("host mismatch in TLS connection");
574 }
575 tagReader.setInputStream(sslSocket.getInputStream());
576 tagWriter.setOutputStream(sslSocket.getOutputStream());
577 sendStartStream();
578 Log.d(Config.LOGTAG, account.getJid()
579 + ": TLS connection established");
580 usingEncryption = true;
581 processStream(tagReader.readTag());
582 sslSocket.close();
583 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
584 e1.printStackTrace();
585 }
586 }
587
588 private void sendSaslAuthPlain() throws IOException {
589 String saslString = CryptoHelper.saslPlain(account.getUsername(),
590 account.getPassword());
591 Element auth = new Element("auth");
592 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
593 auth.setAttribute("mechanism", "PLAIN");
594 auth.setContent(saslString);
595 tagWriter.writeElement(auth);
596 }
597
598 private void sendSaslAuthDigestMd5() throws IOException {
599 Element auth = new Element("auth");
600 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
601 auth.setAttribute("mechanism", "DIGEST-MD5");
602 tagWriter.writeElement(auth);
603 }
604
605 private void processStreamFeatures(Tag currentTag)
606 throws XmlPullParserException, IOException {
607 this.streamFeatures = tagReader.readElement(currentTag);
608 if (this.streamFeatures.hasChild("starttls") && !usingEncryption) {
609 sendStartTLS();
610 } else if (compressionAvailable()) {
611 sendCompressionZlib();
612 } else if (this.streamFeatures.hasChild("register")
613 && account.isOptionSet(Account.OPTION_REGISTER)
614 && usingEncryption) {
615 sendRegistryRequest();
616 } else if (!this.streamFeatures.hasChild("register")
617 && account.isOptionSet(Account.OPTION_REGISTER)) {
618 changeStatus(Account.STATUS_REGISTRATION_NOT_SUPPORTED);
619 disconnect(true);
620 } else if (this.streamFeatures.hasChild("mechanisms")
621 && shouldAuthenticate && usingEncryption) {
622 List<String> mechanisms = extractMechanisms(streamFeatures
623 .findChild("mechanisms"));
624 if (mechanisms.contains("PLAIN")) {
625 sendSaslAuthPlain();
626 } else if (mechanisms.contains("DIGEST-MD5")) {
627 sendSaslAuthDigestMd5();
628 }
629 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
630 + smVersion)
631 && streamId != null) {
632 ResumePacket resume = new ResumePacket(this.streamId,
633 stanzasReceived, smVersion);
634 this.tagWriter.writeStanzaAsync(resume);
635 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
636 sendBindRequest();
637 } else {
638 Log.d(Config.LOGTAG, account.getJid()
639 + ": incompatible server. disconnecting");
640 disconnect(true);
641 }
642 }
643
644 private boolean compressionAvailable() {
645 if (!this.streamFeatures.hasChild("compression",
646 "http://jabber.org/features/compress"))
647 return false;
648 if (!ZLibOutputStream.SUPPORTED)
649 return false;
650 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
651 return false;
652
653 Element compression = this.streamFeatures.findChild("compression",
654 "http://jabber.org/features/compress");
655 for (Element child : compression.getChildren()) {
656 if (!"method".equals(child.getName()))
657 continue;
658
659 if ("zlib".equalsIgnoreCase(child.getContent())) {
660 return true;
661 }
662 }
663 return false;
664 }
665
666 private List<String> extractMechanisms(Element stream) {
667 ArrayList<String> mechanisms = new ArrayList<>(stream
668 .getChildren().size());
669 for (Element child : stream.getChildren()) {
670 mechanisms.add(child.getContent());
671 }
672 return mechanisms;
673 }
674
675 private void sendRegistryRequest() {
676 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
677 register.query("jabber:iq:register");
678 register.setTo(account.getServer());
679 sendIqPacket(register, new OnIqPacketReceived() {
680
681 @Override
682 public void onIqPacketReceived(Account account, IqPacket packet) {
683 Element instructions = packet.query().findChild("instructions");
684 if (packet.query().hasChild("username")
685 && (packet.query().hasChild("password"))) {
686 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
687 Element username = new Element("username")
688 .setContent(account.getUsername());
689 Element password = new Element("password")
690 .setContent(account.getPassword());
691 register.query("jabber:iq:register").addChild(username);
692 register.query().addChild(password);
693 sendIqPacket(register, new OnIqPacketReceived() {
694
695 @Override
696 public void onIqPacketReceived(Account account,
697 IqPacket packet) {
698 if (packet.getType() == IqPacket.TYPE_RESULT) {
699 account.setOption(Account.OPTION_REGISTER,
700 false);
701 changeStatus(Account.STATUS_REGISTRATION_SUCCESSFULL);
702 } else if (packet.hasChild("error")
703 && (packet.findChild("error")
704 .hasChild("conflict"))) {
705 changeStatus(Account.STATUS_REGISTRATION_CONFLICT);
706 } else {
707 changeStatus(Account.STATUS_REGISTRATION_FAILED);
708 Log.d(Config.LOGTAG, packet.toString());
709 }
710 disconnect(true);
711 }
712 });
713 } else {
714 changeStatus(Account.STATUS_REGISTRATION_FAILED);
715 disconnect(true);
716 Log.d(Config.LOGTAG, account.getJid()
717 + ": could not register. instructions are"
718 + instructions.getContent());
719 }
720 }
721 });
722 }
723
724 private void sendBindRequest() throws IOException {
725 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
726 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
727 .addChild("resource").setContent(account.getResource());
728 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
729 @Override
730 public void onIqPacketReceived(Account account, IqPacket packet) {
731 Element bind = packet.findChild("bind");
732 if (bind != null) {
733 final Element jid = bind.findChild("jid");
734 if (jid != null && jid.getContent() != null) {
735 try {
736 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
737 } catch (final InvalidJidException e) {
738 // TODO: Handle the case where an external JID is technically invalid?
739 }
740 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
741 smVersion = 3;
742 EnablePacket enable = new EnablePacket(smVersion);
743 tagWriter.writeStanzaAsync(enable);
744 stanzasSent = 0;
745 messageReceipts.clear();
746 } else if (streamFeatures.hasChild("sm",
747 "urn:xmpp:sm:2")) {
748 smVersion = 2;
749 EnablePacket enable = new EnablePacket(smVersion);
750 tagWriter.writeStanzaAsync(enable);
751 stanzasSent = 0;
752 messageReceipts.clear();
753 }
754 sendServiceDiscoveryInfo(account.getServer());
755 sendServiceDiscoveryItems(account.getServer());
756 if (bindListener != null) {
757 bindListener.onBind(account);
758 }
759 sendInitialPing();
760 } else {
761 disconnect(true);
762 }
763 } else {
764 disconnect(true);
765 }
766 }
767 });
768 if (this.streamFeatures.hasChild("session")) {
769 Log.d(Config.LOGTAG, account.getJid()
770 + ": sending deprecated session");
771 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
772 startSession.addChild("session",
773 "urn:ietf:params:xml:ns:xmpp-session");
774 this.sendUnboundIqPacket(startSession, null);
775 }
776 }
777
778 private void sendServiceDiscoveryInfo(final Jid server) {
779 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
780 iq.setTo(server.toDomainJid());
781 iq.query("http://jabber.org/protocol/disco#info");
782 this.sendIqPacket(iq, new OnIqPacketReceived() {
783
784 @Override
785 public void onIqPacketReceived(Account account, IqPacket packet) {
786 final List<Element> elements = packet.query().getChildren();
787 final List<String> features = new ArrayList<>();
788 for (Element element : elements) {
789 if (element.getName().equals("feature")) {
790 features.add(element.getAttribute("var"));
791 }
792 }
793 disco.put(server.toDomainJid().toString(), features);
794
795 if (account.getServer().equals(server.toDomainJid())) {
796 enableAdvancedStreamFeatures();
797 }
798 }
799 });
800 }
801
802 private void enableAdvancedStreamFeatures() {
803 if (getFeatures().carbons()) {
804 sendEnableCarbons();
805 }
806 }
807
808 private void sendServiceDiscoveryItems(final Jid server) {
809 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
810 iq.setTo(server.toDomainJid());
811 iq.query("http://jabber.org/protocol/disco#items");
812 this.sendIqPacket(iq, new OnIqPacketReceived() {
813
814 @Override
815 public void onIqPacketReceived(Account account, IqPacket packet) {
816 List<Element> elements = packet.query().getChildren();
817 for (Element element : elements) {
818 if (element.getName().equals("item")) {
819 final String jid = element.getAttribute("jid");
820 try {
821 sendServiceDiscoveryInfo(Jid.fromString(jid).toDomainJid());
822 } catch (final InvalidJidException ignored) {
823 // TODO: Handle the case where an external JID is technically invalid?
824 }
825 }
826 }
827 }
828 });
829 }
830
831 private void sendEnableCarbons() {
832 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
833 iq.addChild("enable", "urn:xmpp:carbons:2");
834 this.sendIqPacket(iq, new OnIqPacketReceived() {
835
836 @Override
837 public void onIqPacketReceived(Account account, IqPacket packet) {
838 if (!packet.hasChild("error")) {
839 Log.d(Config.LOGTAG, account.getJid()
840 + ": successfully enabled carbons");
841 } else {
842 Log.d(Config.LOGTAG, account.getJid()
843 + ": error enableing carbons " + packet.toString());
844 }
845 }
846 });
847 }
848
849 private void processStreamError(Tag currentTag)
850 throws XmlPullParserException, IOException {
851 Element streamError = tagReader.readElement(currentTag);
852 if (streamError != null && streamError.hasChild("conflict")) {
853 final String resource = account.getResource().split("\\.")[0];
854 try {
855 account.setResource(resource + "." + nextRandomId());
856 } catch (final InvalidJidException ignored) {
857 // Should never reach here.
858 }
859 Log.d(Config.LOGTAG,
860 account.getJid() + ": switching resource due to conflict ("
861 + account.getResource() + ")");
862 }
863 }
864
865 private void sendStartStream() throws IOException {
866 Tag stream = Tag.start("stream:stream");
867 stream.setAttribute("from", account.getJid().toString());
868 stream.setAttribute("to", account.getServer().toString());
869 stream.setAttribute("version", "1.0");
870 stream.setAttribute("xml:lang", "en");
871 stream.setAttribute("xmlns", "jabber:client");
872 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
873 tagWriter.writeTag(stream);
874 }
875
876 private String nextRandomId() {
877 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
878 }
879
880 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
881 if (packet.getId() == null) {
882 String id = nextRandomId();
883 packet.setAttribute("id", id);
884 }
885 packet.setFrom(account.getFullJid());
886 this.sendPacket(packet, callback);
887 }
888
889 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
890 if (packet.getId() == null) {
891 String id = nextRandomId();
892 packet.setAttribute("id", id);
893 }
894 this.sendPacket(packet, callback);
895 }
896
897 public void sendMessagePacket(MessagePacket packet) {
898 this.sendPacket(packet, null);
899 }
900
901 public void sendPresencePacket(PresencePacket packet) {
902 this.sendPacket(packet, null);
903 }
904
905 private synchronized void sendPacket(final AbstractStanza packet,
906 PacketReceived callback) {
907 if (packet.getName().equals("iq") || packet.getName().equals("message")
908 || packet.getName().equals("presence")) {
909 ++stanzasSent;
910 }
911 tagWriter.writeStanzaAsync(packet);
912 if (packet instanceof MessagePacket && packet.getId() != null
913 && this.streamId != null) {
914 Log.d(Config.LOGTAG, "request delivery report for stanza "
915 + stanzasSent);
916 this.messageReceipts.put(stanzasSent, packet.getId());
917 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
918 }
919 if (callback != null) {
920 if (packet.getId() == null) {
921 packet.setId(nextRandomId());
922 }
923 packetCallbacks.put(packet.getId(), callback);
924 }
925 }
926
927 public void sendPing() {
928 if (streamFeatures.hasChild("sm")) {
929 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
930 } else {
931 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
932 iq.setFrom(account.getFullJid());
933 iq.addChild("ping", "urn:xmpp:ping");
934 this.sendIqPacket(iq, null);
935 }
936 this.lastPingSent = SystemClock.elapsedRealtime();
937 }
938
939 public void setOnMessagePacketReceivedListener(
940 OnMessagePacketReceived listener) {
941 this.messageListener = listener;
942 }
943
944 public void setOnUnregisteredIqPacketReceivedListener(
945 OnIqPacketReceived listener) {
946 this.unregisteredIqListener = listener;
947 }
948
949 public void setOnPresencePacketReceivedListener(
950 OnPresencePacketReceived listener) {
951 this.presenceListener = listener;
952 }
953
954 public void setOnJinglePacketReceivedListener(
955 OnJinglePacketReceived listener) {
956 this.jingleListener = listener;
957 }
958
959 public void setOnStatusChangedListener(OnStatusChanged listener) {
960 this.statusListener = listener;
961 }
962
963 public void setOnBindListener(OnBindListener listener) {
964 this.bindListener = listener;
965 }
966
967 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
968 this.acknowledgedListener = listener;
969 }
970
971 public void disconnect(boolean force) {
972 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting");
973 try {
974 if (force) {
975 socket.close();
976 return;
977 }
978 new Thread(new Runnable() {
979
980 @Override
981 public void run() {
982 if (tagWriter.isActive()) {
983 tagWriter.finish();
984 try {
985 while (!tagWriter.finished()) {
986 Log.d(Config.LOGTAG, "not yet finished");
987 Thread.sleep(100);
988 }
989 tagWriter.writeTag(Tag.end("stream:stream"));
990 socket.close();
991 } catch (IOException e) {
992 Log.d(Config.LOGTAG,
993 "io exception during disconnect");
994 } catch (InterruptedException e) {
995 Log.d(Config.LOGTAG, "interrupted");
996 }
997 }
998 }
999 }).start();
1000 } catch (IOException e) {
1001 Log.d(Config.LOGTAG, "io exception during disconnect");
1002 }
1003 }
1004
1005 public List<String> findDiscoItemsByFeature(String feature) {
1006 final List<String> items = new ArrayList<>();
1007 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1008 if (cursor.getValue().contains(feature)) {
1009 items.add(cursor.getKey());
1010 }
1011 }
1012 return items;
1013 }
1014
1015 public String findDiscoItemByFeature(String feature) {
1016 List<String> items = findDiscoItemsByFeature(feature);
1017 if (items.size() >= 1) {
1018 return items.get(0);
1019 }
1020 return null;
1021 }
1022
1023 public void r() {
1024 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1025 }
1026
1027 public String getMucServer() {
1028 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1029 }
1030
1031 public int getTimeToNextAttempt() {
1032 int interval = (int) (25 * Math.pow(1.5, attempt));
1033 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1034 return interval - secondsSinceLast;
1035 }
1036
1037 public int getAttempt() {
1038 return this.attempt;
1039 }
1040
1041 public Features getFeatures() {
1042 return this.features;
1043 }
1044
1045 public long getLastSessionEstablished() {
1046 long diff;
1047 if (this.lastSessionStarted == 0) {
1048 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1049 } else {
1050 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1051 }
1052 return System.currentTimeMillis() - diff;
1053 }
1054
1055 public long getLastConnect() {
1056 return this.lastConnect;
1057 }
1058
1059 public long getLastPingSent() {
1060 return this.lastPingSent;
1061 }
1062
1063 public long getLastPacketReceived() {
1064 return this.lastPaketReceived;
1065 }
1066
1067 public void sendActive() {
1068 this.sendPacket(new ActivePacket(), null);
1069 }
1070
1071 public void sendInactive() {
1072 this.sendPacket(new InactivePacket(), null);
1073 }
1074
1075 public class Features {
1076 XmppConnection connection;
1077
1078 public Features(XmppConnection connection) {
1079 this.connection = connection;
1080 }
1081
1082 private boolean hasDiscoFeature(final Jid server, final String feature) {
1083 return connection.disco.containsKey(server.toDomainJid().toString()) &&
1084 connection.disco.get(server.toDomainJid().toString()).contains(feature);
1085 }
1086
1087 public boolean carbons() {
1088 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1089 }
1090
1091 public boolean sm() {
1092 return streamId != null;
1093 }
1094
1095 public boolean csi() {
1096 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1097 }
1098
1099 public boolean pubsub() {
1100 return hasDiscoFeature(account.getServer(),
1101 "http://jabber.org/protocol/pubsub#publish");
1102 }
1103
1104 public boolean mam() {
1105 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1106 }
1107
1108 public boolean rosterVersioning() {
1109 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1110 }
1111
1112 public boolean streamhost() {
1113 return connection
1114 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1115 }
1116
1117 public boolean compression() {
1118 return connection.usingCompression;
1119 }
1120 }
1121}