1package eu.siacs.conversations.xmpp;
2
3import java.io.IOException;
4import java.io.InputStream;
5import java.io.OutputStream;
6import java.math.BigInteger;
7import java.net.Socket;
8import java.net.UnknownHostException;
9import java.security.KeyManagementException;
10import java.security.NoSuchAlgorithmException;
11import java.security.SecureRandom;
12import java.util.ArrayList;
13import java.util.Arrays;
14import java.util.HashMap;
15import java.util.Hashtable;
16import java.util.LinkedList;
17import java.util.List;
18import java.util.Map.Entry;
19
20import javax.net.ssl.HostnameVerifier;
21import javax.net.ssl.SSLContext;
22import javax.net.ssl.SSLSocket;
23import javax.net.ssl.SSLSocketFactory;
24
25import javax.net.ssl.X509TrustManager;
26
27import org.apache.http.conn.ssl.StrictHostnameVerifier;
28import org.xmlpull.v1.XmlPullParserException;
29
30import de.duenndns.ssl.MemorizingTrustManager;
31
32import android.content.Context;
33import android.content.SharedPreferences;
34import android.os.Bundle;
35import android.os.PowerManager;
36import android.os.PowerManager.WakeLock;
37import android.os.SystemClock;
38import android.preference.PreferenceManager;
39import android.util.Log;
40import android.util.SparseArray;
41import eu.siacs.conversations.Config;
42import eu.siacs.conversations.entities.Account;
43import eu.siacs.conversations.services.XmppConnectionService;
44import eu.siacs.conversations.utils.CryptoHelper;
45import eu.siacs.conversations.utils.DNSHelper;
46import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
47import eu.siacs.conversations.utils.zlib.ZLibInputStream;
48import eu.siacs.conversations.xml.Element;
49import eu.siacs.conversations.xml.Tag;
50import eu.siacs.conversations.xml.TagWriter;
51import eu.siacs.conversations.xml.XmlReader;
52import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
53import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
54import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
55import eu.siacs.conversations.xmpp.stanzas.IqPacket;
56import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
57import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
58import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
59import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
60import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
61import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
62import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
63import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
64
65public class XmppConnection implements Runnable {
66
67 protected Account account;
68
69 private WakeLock wakeLock;
70
71 private SecureRandom mRandom;
72
73 private Socket socket;
74 private XmlReader tagReader;
75 private TagWriter tagWriter;
76
77 private Features features = new Features(this);
78
79 private boolean shouldBind = true;
80 private boolean shouldAuthenticate = true;
81 private Element streamFeatures;
82 private HashMap<String, List<String>> disco = new HashMap<String, List<String>>();
83
84 private String streamId = null;
85 private int smVersion = 3;
86 private SparseArray<String> messageReceipts = new SparseArray<String>();
87
88 private boolean usingCompression = false;
89 private boolean usingEncryption = false;
90
91 private int stanzasReceived = 0;
92 private int stanzasSent = 0;
93
94 private long lastPaketReceived = 0;
95 private long lastPingSent = 0;
96 private long lastConnect = 0;
97 private long lastSessionStarted = 0;
98
99 private int attempt = 0;
100
101 private static final int PACKET_IQ = 0;
102 private static final int PACKET_MESSAGE = 1;
103 private static final int PACKET_PRESENCE = 2;
104
105 private Hashtable<String, PacketReceived> packetCallbacks = new Hashtable<String, PacketReceived>();
106 private OnPresencePacketReceived presenceListener = null;
107 private OnJinglePacketReceived jingleListener = null;
108 private OnIqPacketReceived unregisteredIqListener = null;
109 private OnMessagePacketReceived messageListener = null;
110 private OnStatusChanged statusListener = null;
111 private OnBindListener bindListener = null;
112 private OnMessageAcknowledged acknowledgedListener = null;
113 private MemorizingTrustManager mMemorizingTrustManager;
114 private final Context applicationContext;
115
116 public XmppConnection(Account account, XmppConnectionService service) {
117 this.mRandom = service.getRNG();
118 this.mMemorizingTrustManager = service.getMemorizingTrustManager();
119 this.account = account;
120 this.wakeLock = service.getPowerManager().newWakeLock(
121 PowerManager.PARTIAL_WAKE_LOCK, account.getJid());
122 tagWriter = new TagWriter();
123 applicationContext = service.getApplicationContext();
124 }
125
126 protected void changeStatus(int nextStatus) {
127 if (account.getStatus() != nextStatus) {
128 if ((nextStatus == Account.STATUS_OFFLINE)
129 && (account.getStatus() != Account.STATUS_CONNECTING)
130 && (account.getStatus() != Account.STATUS_ONLINE)
131 && (account.getStatus() != Account.STATUS_DISABLED)) {
132 return;
133 }
134 if (nextStatus == Account.STATUS_ONLINE) {
135 this.attempt = 0;
136 }
137 account.setStatus(nextStatus);
138 if (statusListener != null) {
139 statusListener.onStatusChanged(account);
140 }
141 }
142 }
143
144 protected void connect() {
145 Log.d(Config.LOGTAG, account.getJid() + ": connecting");
146 usingCompression = false;
147 usingEncryption = false;
148 lastConnect = SystemClock.elapsedRealtime();
149 lastPingSent = SystemClock.elapsedRealtime();
150 this.attempt++;
151 try {
152 shouldAuthenticate = shouldBind = !account
153 .isOptionSet(Account.OPTION_REGISTER);
154 tagReader = new XmlReader(wakeLock);
155 tagWriter = new TagWriter();
156 packetCallbacks.clear();
157 this.changeStatus(Account.STATUS_CONNECTING);
158 Bundle namePort = DNSHelper.getSRVRecord(account.getServer());
159 if ("timeout".equals(namePort.getString("error"))) {
160 Log.d(Config.LOGTAG, account.getJid() + ": dns timeout");
161 this.changeStatus(Account.STATUS_OFFLINE);
162 return;
163 }
164 String srvRecordServer = namePort.getString("name");
165 String srvIpServer = namePort.getString("ipv4");
166 int srvRecordPort = namePort.getInt("port");
167 if (srvRecordServer != null) {
168 if (srvIpServer != null) {
169 Log.d(Config.LOGTAG, account.getJid()
170 + ": using values from dns " + srvRecordServer
171 + "[" + srvIpServer + "]:" + srvRecordPort);
172 socket = new Socket(srvIpServer, srvRecordPort);
173 } else {
174 boolean socketError = true;
175 int srvIndex = 0;
176 while (socketError
177 && namePort.containsKey("name" + srvIndex)) {
178 try {
179 srvRecordServer = namePort.getString("name"
180 + srvIndex);
181 srvRecordPort = namePort.getInt("port" + srvIndex);
182 Log.d(Config.LOGTAG, account.getJid()
183 + ": using values from dns "
184 + srvRecordServer + ":" + srvRecordPort);
185 socket = new Socket(srvRecordServer, srvRecordPort);
186 socketError = false;
187 } catch (UnknownHostException e) {
188 srvIndex++;
189 if (!namePort.containsKey("name" + srvIndex)) {
190 throw e;
191 }
192 } catch (IOException e) {
193 srvIndex++;
194 if (!namePort.containsKey("name" + srvIndex)) {
195 throw e;
196 }
197 }
198 }
199 }
200 } else if (namePort.containsKey("error")
201 && "nosrv".equals(namePort.getString("error", null))) {
202 socket = new Socket(account.getServer(), 5222);
203 } else {
204 Log.d(Config.LOGTAG, account.getJid()
205 + ": timeout in DNS resolution");
206 changeStatus(Account.STATUS_OFFLINE);
207 return;
208 }
209 OutputStream out = socket.getOutputStream();
210 tagWriter.setOutputStream(out);
211 InputStream in = socket.getInputStream();
212 tagReader.setInputStream(in);
213 tagWriter.beginDocument();
214 sendStartStream();
215 Tag nextTag;
216 while ((nextTag = tagReader.readTag()) != null) {
217 if (nextTag.isStart("stream")) {
218 processStream(nextTag);
219 break;
220 } else {
221 Log.d(Config.LOGTAG,
222 "found unexpected tag: " + nextTag.getName());
223 return;
224 }
225 }
226 if (socket.isConnected()) {
227 socket.close();
228 }
229 } catch (UnknownHostException e) {
230 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
231 if (wakeLock.isHeld()) {
232 try {
233 wakeLock.release();
234 } catch (RuntimeException re) {
235 }
236 }
237 return;
238 } catch (IOException e) {
239 this.changeStatus(Account.STATUS_OFFLINE);
240 if (wakeLock.isHeld()) {
241 try {
242 wakeLock.release();
243 } catch (RuntimeException re) {
244 }
245 }
246 return;
247 } catch (NoSuchAlgorithmException e) {
248 this.changeStatus(Account.STATUS_OFFLINE);
249 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
250 if (wakeLock.isHeld()) {
251 try {
252 wakeLock.release();
253 } catch (RuntimeException re) {
254 }
255 }
256 return;
257 } catch (XmlPullParserException e) {
258 this.changeStatus(Account.STATUS_OFFLINE);
259 Log.d(Config.LOGTAG, "xml exception " + e.getMessage());
260 if (wakeLock.isHeld()) {
261 try {
262 wakeLock.release();
263 } catch (RuntimeException re) {
264 }
265 }
266 return;
267 }
268
269 }
270
271 @Override
272 public void run() {
273 connect();
274 }
275
276 private void processStream(Tag currentTag) throws XmlPullParserException,
277 IOException, NoSuchAlgorithmException {
278 Tag nextTag = tagReader.readTag();
279 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
280 if (nextTag.isStart("error")) {
281 processStreamError(nextTag);
282 } else if (nextTag.isStart("features")) {
283 processStreamFeatures(nextTag);
284 } else if (nextTag.isStart("proceed")) {
285 switchOverToTls(nextTag);
286 } else if (nextTag.isStart("compressed")) {
287 switchOverToZLib(nextTag);
288 } else if (nextTag.isStart("success")) {
289 Log.d(Config.LOGTAG, account.getJid() + ": logged in");
290 tagReader.readTag();
291 tagReader.reset();
292 sendStartStream();
293 processStream(tagReader.readTag());
294 break;
295 } else if (nextTag.isStart("failure")) {
296 tagReader.readElement(nextTag);
297 changeStatus(Account.STATUS_UNAUTHORIZED);
298 } else if (nextTag.isStart("challenge")) {
299 String challange = tagReader.readElement(nextTag).getContent();
300 Element response = new Element("response");
301 response.setAttribute("xmlns",
302 "urn:ietf:params:xml:ns:xmpp-sasl");
303 response.setContent(CryptoHelper.saslDigestMd5(account,
304 challange, mRandom));
305 tagWriter.writeElement(response);
306 } else if (nextTag.isStart("enabled")) {
307 Element enabled = tagReader.readElement(nextTag);
308 if ("true".equals(enabled.getAttribute("resume"))) {
309 this.streamId = enabled.getAttribute("id");
310 Log.d(Config.LOGTAG, account.getJid()
311 + ": stream managment(" + smVersion
312 + ") enabled (resumable)");
313 } else {
314 Log.d(Config.LOGTAG, account.getJid()
315 + ": stream managment(" + smVersion + ") enabled");
316 }
317 this.lastSessionStarted = SystemClock.elapsedRealtime();
318 this.stanzasReceived = 0;
319 RequestPacket r = new RequestPacket(smVersion);
320 tagWriter.writeStanzaAsync(r);
321 } else if (nextTag.isStart("resumed")) {
322 lastPaketReceived = SystemClock.elapsedRealtime();
323 Element resumed = tagReader.readElement(nextTag);
324 String h = resumed.getAttribute("h");
325 try {
326 int serverCount = Integer.parseInt(h);
327 if (serverCount != stanzasSent) {
328 Log.d(Config.LOGTAG, account.getJid()
329 + ": session resumed with lost packages");
330 stanzasSent = serverCount;
331 } else {
332 Log.d(Config.LOGTAG, account.getJid()
333 + ": session resumed");
334 }
335 if (acknowledgedListener != null) {
336 for (int i = 0; i < messageReceipts.size(); ++i) {
337 if (serverCount >= messageReceipts.keyAt(i)) {
338 acknowledgedListener.onMessageAcknowledged(
339 account, messageReceipts.valueAt(i));
340 }
341 }
342 }
343 messageReceipts.clear();
344 } catch (NumberFormatException e) {
345
346 }
347 sendInitialPing();
348
349 } else if (nextTag.isStart("r")) {
350 tagReader.readElement(nextTag);
351 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
352 tagWriter.writeStanzaAsync(ack);
353 } else if (nextTag.isStart("a")) {
354 Element ack = tagReader.readElement(nextTag);
355 lastPaketReceived = SystemClock.elapsedRealtime();
356 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
357 String msgId = this.messageReceipts.get(serverSequence);
358 if (msgId != null) {
359 if (this.acknowledgedListener != null) {
360 this.acknowledgedListener.onMessageAcknowledged(
361 account, msgId);
362 }
363 this.messageReceipts.remove(serverSequence);
364 }
365 } else if (nextTag.isStart("failed")) {
366 tagReader.readElement(nextTag);
367 Log.d(Config.LOGTAG, account.getJid() + ": resumption failed");
368 streamId = null;
369 if (account.getStatus() != Account.STATUS_ONLINE) {
370 sendBindRequest();
371 }
372 } else if (nextTag.isStart("iq")) {
373 processIq(nextTag);
374 } else if (nextTag.isStart("message")) {
375 processMessage(nextTag);
376 } else if (nextTag.isStart("presence")) {
377 processPresence(nextTag);
378 }
379 nextTag = tagReader.readTag();
380 }
381 if (account.getStatus() == Account.STATUS_ONLINE) {
382 account.setStatus(Account.STATUS_OFFLINE);
383 if (statusListener != null) {
384 statusListener.onStatusChanged(account);
385 }
386 }
387 }
388
389 private void sendInitialPing() {
390 Log.d(Config.LOGTAG, account.getJid() + ": sending intial ping");
391 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
392 iq.setFrom(account.getFullJid());
393 iq.addChild("ping", "urn:xmpp:ping");
394 this.sendIqPacket(iq, new OnIqPacketReceived() {
395
396 @Override
397 public void onIqPacketReceived(Account account, IqPacket packet) {
398 Log.d(Config.LOGTAG, account.getJid()
399 + ": online with resource " + account.getResource());
400 changeStatus(Account.STATUS_ONLINE);
401 }
402 });
403 }
404
405 private Element processPacket(Tag currentTag, int packetType)
406 throws XmlPullParserException, IOException {
407 Element element;
408 switch (packetType) {
409 case PACKET_IQ:
410 element = new IqPacket();
411 break;
412 case PACKET_MESSAGE:
413 element = new MessagePacket();
414 break;
415 case PACKET_PRESENCE:
416 element = new PresencePacket();
417 break;
418 default:
419 return null;
420 }
421 element.setAttributes(currentTag.getAttributes());
422 Tag nextTag = tagReader.readTag();
423 if (nextTag == null) {
424 throw new IOException("interrupted mid tag");
425 }
426 while (!nextTag.isEnd(element.getName())) {
427 if (!nextTag.isNo()) {
428 Element child = tagReader.readElement(nextTag);
429 String type = currentTag.getAttribute("type");
430 if (packetType == PACKET_IQ
431 && "jingle".equals(child.getName())
432 && ("set".equalsIgnoreCase(type) || "get"
433 .equalsIgnoreCase(type))) {
434 element = new JinglePacket();
435 element.setAttributes(currentTag.getAttributes());
436 }
437 element.addChild(child);
438 }
439 nextTag = tagReader.readTag();
440 if (nextTag == null) {
441 throw new IOException("interrupted mid tag");
442 }
443 }
444 ++stanzasReceived;
445 lastPaketReceived = SystemClock.elapsedRealtime();
446 return element;
447 }
448
449 private void processIq(Tag currentTag) throws XmlPullParserException,
450 IOException {
451 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
452
453 if (packet.getId() == null) {
454 return; // an iq packet without id is definitely invalid
455 }
456
457 if (packet instanceof JinglePacket) {
458 if (this.jingleListener != null) {
459 this.jingleListener.onJinglePacketReceived(account,
460 (JinglePacket) packet);
461 }
462 } else {
463 if (packetCallbacks.containsKey(packet.getId())) {
464 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
465 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
466 .onIqPacketReceived(account, packet);
467 }
468
469 packetCallbacks.remove(packet.getId());
470 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
471 .getType() == IqPacket.TYPE_SET)
472 && this.unregisteredIqListener != null) {
473 this.unregisteredIqListener.onIqPacketReceived(account, packet);
474 }
475 }
476 }
477
478 private void processMessage(Tag currentTag) throws XmlPullParserException,
479 IOException {
480 MessagePacket packet = (MessagePacket) processPacket(currentTag,
481 PACKET_MESSAGE);
482 String id = packet.getAttribute("id");
483 if ((id != null) && (packetCallbacks.containsKey(id))) {
484 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
485 ((OnMessagePacketReceived) packetCallbacks.get(id))
486 .onMessagePacketReceived(account, packet);
487 }
488 packetCallbacks.remove(id);
489 } else if (this.messageListener != null) {
490 this.messageListener.onMessagePacketReceived(account, packet);
491 }
492 }
493
494 private void processPresence(Tag currentTag) throws XmlPullParserException,
495 IOException {
496 PresencePacket packet = (PresencePacket) processPacket(currentTag,
497 PACKET_PRESENCE);
498 String id = packet.getAttribute("id");
499 if ((id != null) && (packetCallbacks.containsKey(id))) {
500 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
501 ((OnPresencePacketReceived) packetCallbacks.get(id))
502 .onPresencePacketReceived(account, packet);
503 }
504 packetCallbacks.remove(id);
505 } else if (this.presenceListener != null) {
506 this.presenceListener.onPresencePacketReceived(account, packet);
507 }
508 }
509
510 private void sendCompressionZlib() throws IOException {
511 Element compress = new Element("compress");
512 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
513 compress.addChild("method").setContent("zlib");
514 tagWriter.writeElement(compress);
515 }
516
517 private void switchOverToZLib(Tag currentTag)
518 throws XmlPullParserException, IOException,
519 NoSuchAlgorithmException {
520 tagReader.readTag(); // read tag close
521 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
522 .getOutputStream()));
523 tagReader
524 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
525
526 sendStartStream();
527 Log.d(Config.LOGTAG, account.getJid() + ": compression enabled");
528 usingCompression = true;
529 processStream(tagReader.readTag());
530 }
531
532 private void sendStartTLS() throws IOException {
533 Tag startTLS = Tag.empty("starttls");
534 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
535 tagWriter.writeTag(startTLS);
536 }
537
538 private SharedPreferences getPreferences() {
539 return PreferenceManager
540 .getDefaultSharedPreferences(applicationContext);
541 }
542
543 private boolean enableLegacySSL() {
544 return getPreferences().getBoolean("enable_legacy_ssl", false);
545 }
546
547 private void switchOverToTls(Tag currentTag) throws XmlPullParserException,
548 IOException {
549 tagReader.readTag();
550 try {
551 SSLContext sc = SSLContext.getInstance("TLS");
552 sc.init(null,
553 new X509TrustManager[] { this.mMemorizingTrustManager },
554 mRandom);
555 SSLSocketFactory factory = sc.getSocketFactory();
556
557 HostnameVerifier verifier = this.mMemorizingTrustManager
558 .wrapHostnameVerifier(new StrictHostnameVerifier());
559 SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,
560 socket.getInetAddress().getHostAddress(), socket.getPort(),
561 true);
562
563 // Support all protocols except legacy SSL.
564 // The min SDK version prevents us having to worry about SSLv2. In
565 // future, this may be
566 // true of SSLv3 as well.
567 final String[] supportProtocols;
568 if (enableLegacySSL()) {
569 supportProtocols = sslSocket.getSupportedProtocols();
570 } else {
571 final List<String> supportedProtocols = new LinkedList<String>(
572 Arrays.asList(sslSocket.getSupportedProtocols()));
573 supportedProtocols.remove("SSLv3");
574 supportProtocols = new String[supportedProtocols.size()];
575 supportedProtocols.toArray(supportProtocols);
576 }
577 sslSocket.setEnabledProtocols(supportProtocols);
578
579 if (verifier != null
580 && !verifier.verify(account.getServer(),
581 sslSocket.getSession())) {
582 Log.d(Config.LOGTAG, account.getJid()
583 + ": host mismatch in TLS connection");
584 sslSocket.close();
585 throw new IOException();
586 }
587 tagReader.setInputStream(sslSocket.getInputStream());
588 tagWriter.setOutputStream(sslSocket.getOutputStream());
589 sendStartStream();
590 Log.d(Config.LOGTAG, account.getJid()
591 + ": TLS connection established");
592 usingEncryption = true;
593 processStream(tagReader.readTag());
594 sslSocket.close();
595 } catch (NoSuchAlgorithmException e1) {
596 e1.printStackTrace();
597 } catch (KeyManagementException e) {
598 e.printStackTrace();
599 }
600 }
601
602 private void sendSaslAuthPlain() throws IOException {
603 String saslString = CryptoHelper.saslPlain(account.getUsername(),
604 account.getPassword());
605 Element auth = new Element("auth");
606 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
607 auth.setAttribute("mechanism", "PLAIN");
608 auth.setContent(saslString);
609 tagWriter.writeElement(auth);
610 }
611
612 private void sendSaslAuthDigestMd5() throws IOException {
613 Element auth = new Element("auth");
614 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
615 auth.setAttribute("mechanism", "DIGEST-MD5");
616 tagWriter.writeElement(auth);
617 }
618
619 private void processStreamFeatures(Tag currentTag)
620 throws XmlPullParserException, IOException {
621 this.streamFeatures = tagReader.readElement(currentTag);
622 if (this.streamFeatures.hasChild("starttls") && !usingEncryption) {
623 sendStartTLS();
624 } else if (compressionAvailable()) {
625 sendCompressionZlib();
626 } else if (this.streamFeatures.hasChild("register")
627 && account.isOptionSet(Account.OPTION_REGISTER)
628 && usingEncryption) {
629 sendRegistryRequest();
630 } else if (!this.streamFeatures.hasChild("register")
631 && account.isOptionSet(Account.OPTION_REGISTER)) {
632 changeStatus(Account.STATUS_REGISTRATION_NOT_SUPPORTED);
633 disconnect(true);
634 } else if (this.streamFeatures.hasChild("mechanisms")
635 && shouldAuthenticate && usingEncryption) {
636 List<String> mechanisms = extractMechanisms(streamFeatures
637 .findChild("mechanisms"));
638 if (mechanisms.contains("PLAIN")) {
639 sendSaslAuthPlain();
640 } else if (mechanisms.contains("DIGEST-MD5")) {
641 sendSaslAuthDigestMd5();
642 }
643 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
644 + smVersion)
645 && streamId != null) {
646 ResumePacket resume = new ResumePacket(this.streamId,
647 stanzasReceived, smVersion);
648 this.tagWriter.writeStanzaAsync(resume);
649 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
650 sendBindRequest();
651 } else {
652 Log.d(Config.LOGTAG, account.getJid()
653 + ": incompatible server. disconnecting");
654 disconnect(true);
655 }
656 }
657
658 private boolean compressionAvailable() {
659 if (!this.streamFeatures.hasChild("compression",
660 "http://jabber.org/features/compress"))
661 return false;
662 if (!ZLibOutputStream.SUPPORTED)
663 return false;
664 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
665 return false;
666
667 Element compression = this.streamFeatures.findChild("compression",
668 "http://jabber.org/features/compress");
669 for (Element child : compression.getChildren()) {
670 if (!"method".equals(child.getName()))
671 continue;
672
673 if ("zlib".equalsIgnoreCase(child.getContent())) {
674 return true;
675 }
676 }
677 return false;
678 }
679
680 private List<String> extractMechanisms(Element stream) {
681 ArrayList<String> mechanisms = new ArrayList<String>(stream
682 .getChildren().size());
683 for (Element child : stream.getChildren()) {
684 mechanisms.add(child.getContent());
685 }
686 return mechanisms;
687 }
688
689 private void sendRegistryRequest() {
690 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
691 register.query("jabber:iq:register");
692 register.setTo(account.getServer());
693 sendIqPacket(register, new OnIqPacketReceived() {
694
695 @Override
696 public void onIqPacketReceived(Account account, IqPacket packet) {
697 Element instructions = packet.query().findChild("instructions");
698 if (packet.query().hasChild("username")
699 && (packet.query().hasChild("password"))) {
700 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
701 Element username = new Element("username")
702 .setContent(account.getUsername());
703 Element password = new Element("password")
704 .setContent(account.getPassword());
705 register.query("jabber:iq:register").addChild(username);
706 register.query().addChild(password);
707 sendIqPacket(register, new OnIqPacketReceived() {
708
709 @Override
710 public void onIqPacketReceived(Account account,
711 IqPacket packet) {
712 if (packet.getType() == IqPacket.TYPE_RESULT) {
713 account.setOption(Account.OPTION_REGISTER,
714 false);
715 changeStatus(Account.STATUS_REGISTRATION_SUCCESSFULL);
716 } else if (packet.hasChild("error")
717 && (packet.findChild("error")
718 .hasChild("conflict"))) {
719 changeStatus(Account.STATUS_REGISTRATION_CONFLICT);
720 } else {
721 changeStatus(Account.STATUS_REGISTRATION_FAILED);
722 Log.d(Config.LOGTAG, packet.toString());
723 }
724 disconnect(true);
725 }
726 });
727 } else {
728 changeStatus(Account.STATUS_REGISTRATION_FAILED);
729 disconnect(true);
730 Log.d(Config.LOGTAG, account.getJid()
731 + ": could not register. instructions are"
732 + instructions.getContent());
733 }
734 }
735 });
736 }
737
738 private void sendBindRequest() throws IOException {
739 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
740 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
741 .addChild("resource").setContent(account.getResource());
742 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
743 @Override
744 public void onIqPacketReceived(Account account, IqPacket packet) {
745 Element bind = packet.findChild("bind");
746 if (bind != null) {
747 Element jid = bind.findChild("jid");
748 if (jid != null && jid.getContent() != null) {
749 account.setResource(jid.getContent().split("/", 2)[1]);
750 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
751 smVersion = 3;
752 EnablePacket enable = new EnablePacket(smVersion);
753 tagWriter.writeStanzaAsync(enable);
754 stanzasSent = 0;
755 messageReceipts.clear();
756 } else if (streamFeatures.hasChild("sm",
757 "urn:xmpp:sm:2")) {
758 smVersion = 2;
759 EnablePacket enable = new EnablePacket(smVersion);
760 tagWriter.writeStanzaAsync(enable);
761 stanzasSent = 0;
762 messageReceipts.clear();
763 }
764 sendServiceDiscoveryInfo(account.getServer());
765 sendServiceDiscoveryItems(account.getServer());
766 if (bindListener != null) {
767 bindListener.onBind(account);
768 }
769 sendInitialPing();
770 } else {
771 disconnect(true);
772 }
773 } else {
774 disconnect(true);
775 }
776 }
777 });
778 if (this.streamFeatures.hasChild("session")) {
779 Log.d(Config.LOGTAG, account.getJid()
780 + ": sending deprecated session");
781 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
782 startSession.addChild("session",
783 "urn:ietf:params:xml:ns:xmpp-session");
784 this.sendUnboundIqPacket(startSession, null);
785 }
786 }
787
788 private void sendServiceDiscoveryInfo(final String server) {
789 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
790 iq.setTo(server);
791 iq.query("http://jabber.org/protocol/disco#info");
792 this.sendIqPacket(iq, new OnIqPacketReceived() {
793
794 @Override
795 public void onIqPacketReceived(Account account, IqPacket packet) {
796 List<Element> elements = packet.query().getChildren();
797 List<String> features = new ArrayList<String>();
798 for (int i = 0; i < elements.size(); ++i) {
799 if (elements.get(i).getName().equals("feature")) {
800 features.add(elements.get(i).getAttribute("var"));
801 }
802 }
803 disco.put(server, features);
804
805 if (account.getServer().equals(server)) {
806 enableAdvancedStreamFeatures();
807 }
808 }
809 });
810 }
811
812 private void enableAdvancedStreamFeatures() {
813 if (getFeatures().carbons()) {
814 sendEnableCarbons();
815 }
816 }
817
818 private void sendServiceDiscoveryItems(final String server) {
819 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
820 iq.setTo(server);
821 iq.query("http://jabber.org/protocol/disco#items");
822 this.sendIqPacket(iq, new OnIqPacketReceived() {
823
824 @Override
825 public void onIqPacketReceived(Account account, IqPacket packet) {
826 List<Element> elements = packet.query().getChildren();
827 for (int i = 0; i < elements.size(); ++i) {
828 if (elements.get(i).getName().equals("item")) {
829 String jid = elements.get(i).getAttribute("jid");
830 sendServiceDiscoveryInfo(jid);
831 }
832 }
833 }
834 });
835 }
836
837 private void sendEnableCarbons() {
838 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
839 iq.addChild("enable", "urn:xmpp:carbons:2");
840 this.sendIqPacket(iq, new OnIqPacketReceived() {
841
842 @Override
843 public void onIqPacketReceived(Account account, IqPacket packet) {
844 if (!packet.hasChild("error")) {
845 Log.d(Config.LOGTAG, account.getJid()
846 + ": successfully enabled carbons");
847 } else {
848 Log.d(Config.LOGTAG, account.getJid()
849 + ": error enableing carbons " + packet.toString());
850 }
851 }
852 });
853 }
854
855 private void processStreamError(Tag currentTag)
856 throws XmlPullParserException, IOException {
857 Element streamError = tagReader.readElement(currentTag);
858 if (streamError != null && streamError.hasChild("conflict")) {
859 String resource = account.getResource().split("\\.")[0];
860 account.setResource(resource + "." + nextRandomId());
861 Log.d(Config.LOGTAG,
862 account.getJid() + ": switching resource due to conflict ("
863 + account.getResource() + ")");
864 }
865 }
866
867 private void sendStartStream() throws IOException {
868 Tag stream = Tag.start("stream:stream");
869 stream.setAttribute("from", account.getJid());
870 stream.setAttribute("to", account.getServer());
871 stream.setAttribute("version", "1.0");
872 stream.setAttribute("xml:lang", "en");
873 stream.setAttribute("xmlns", "jabber:client");
874 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
875 tagWriter.writeTag(stream);
876 }
877
878 private String nextRandomId() {
879 return new BigInteger(50, mRandom).toString(32);
880 }
881
882 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
883 if (packet.getId() == null) {
884 String id = nextRandomId();
885 packet.setAttribute("id", id);
886 }
887 packet.setFrom(account.getFullJid());
888 this.sendPacket(packet, callback);
889 }
890
891 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
892 if (packet.getId() == null) {
893 String id = nextRandomId();
894 packet.setAttribute("id", id);
895 }
896 this.sendPacket(packet, callback);
897 }
898
899 public void sendMessagePacket(MessagePacket packet) {
900 this.sendPacket(packet, null);
901 }
902
903 public void sendPresencePacket(PresencePacket packet) {
904 this.sendPacket(packet, null);
905 }
906
907 private synchronized void sendPacket(final AbstractStanza packet,
908 PacketReceived callback) {
909 if (packet.getName().equals("iq") || packet.getName().equals("message")
910 || packet.getName().equals("presence")) {
911 ++stanzasSent;
912 }
913 tagWriter.writeStanzaAsync(packet);
914 if (packet instanceof MessagePacket && packet.getId() != null
915 && this.streamId != null) {
916 Log.d(Config.LOGTAG, "request delivery report for stanza "
917 + stanzasSent);
918 this.messageReceipts.put(stanzasSent, packet.getId());
919 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
920 }
921 if (callback != null) {
922 if (packet.getId() == null) {
923 packet.setId(nextRandomId());
924 }
925 packetCallbacks.put(packet.getId(), callback);
926 }
927 }
928
929 public void sendPing() {
930 if (streamFeatures.hasChild("sm")) {
931 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
932 } else {
933 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
934 iq.setFrom(account.getFullJid());
935 iq.addChild("ping", "urn:xmpp:ping");
936 this.sendIqPacket(iq, null);
937 }
938 this.lastPingSent = SystemClock.elapsedRealtime();
939 }
940
941 public void setOnMessagePacketReceivedListener(
942 OnMessagePacketReceived listener) {
943 this.messageListener = listener;
944 }
945
946 public void setOnUnregisteredIqPacketReceivedListener(
947 OnIqPacketReceived listener) {
948 this.unregisteredIqListener = listener;
949 }
950
951 public void setOnPresencePacketReceivedListener(
952 OnPresencePacketReceived listener) {
953 this.presenceListener = listener;
954 }
955
956 public void setOnJinglePacketReceivedListener(
957 OnJinglePacketReceived listener) {
958 this.jingleListener = listener;
959 }
960
961 public void setOnStatusChangedListener(OnStatusChanged listener) {
962 this.statusListener = listener;
963 }
964
965 public void setOnBindListener(OnBindListener listener) {
966 this.bindListener = listener;
967 }
968
969 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
970 this.acknowledgedListener = listener;
971 }
972
973 public void disconnect(boolean force) {
974 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting");
975 try {
976 if (force) {
977 socket.close();
978 return;
979 }
980 new Thread(new Runnable() {
981
982 @Override
983 public void run() {
984 if (tagWriter.isActive()) {
985 tagWriter.finish();
986 try {
987 while (!tagWriter.finished()) {
988 Log.d(Config.LOGTAG, "not yet finished");
989 Thread.sleep(100);
990 }
991 tagWriter.writeTag(Tag.end("stream:stream"));
992 socket.close();
993 } catch (IOException e) {
994 Log.d(Config.LOGTAG,
995 "io exception during disconnect");
996 } catch (InterruptedException e) {
997 Log.d(Config.LOGTAG, "interrupted");
998 }
999 }
1000 }
1001 }).start();
1002 } catch (IOException e) {
1003 Log.d(Config.LOGTAG, "io exception during disconnect");
1004 }
1005 }
1006
1007 public List<String> findDiscoItemsByFeature(String feature) {
1008 List<String> items = new ArrayList<String>();
1009 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1010 if (cursor.getValue().contains(feature)) {
1011 items.add(cursor.getKey());
1012 }
1013 }
1014 return items;
1015 }
1016
1017 public String findDiscoItemByFeature(String feature) {
1018 List<String> items = findDiscoItemsByFeature(feature);
1019 if (items.size() >= 1) {
1020 return items.get(0);
1021 }
1022 return null;
1023 }
1024
1025 public void r() {
1026 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1027 }
1028
1029 public String getMucServer() {
1030 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1031 }
1032
1033 public int getTimeToNextAttempt() {
1034 int interval = (int) (25 * Math.pow(1.5, attempt));
1035 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1036 return interval - secondsSinceLast;
1037 }
1038
1039 public int getAttempt() {
1040 return this.attempt;
1041 }
1042
1043 public Features getFeatures() {
1044 return this.features;
1045 }
1046
1047 public class Features {
1048 XmppConnection connection;
1049
1050 public Features(XmppConnection connection) {
1051 this.connection = connection;
1052 }
1053
1054 private boolean hasDiscoFeature(String server, String feature) {
1055 if (!connection.disco.containsKey(server)) {
1056 return false;
1057 }
1058 return connection.disco.get(server).contains(feature);
1059 }
1060
1061 public boolean carbons() {
1062 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1063 }
1064
1065 public boolean sm() {
1066 return streamId != null;
1067 }
1068
1069 public boolean csi() {
1070 if (connection.streamFeatures == null) {
1071 return false;
1072 } else {
1073 return connection.streamFeatures.hasChild("csi",
1074 "urn:xmpp:csi:0");
1075 }
1076 }
1077
1078 public boolean pubsub() {
1079 return hasDiscoFeature(account.getServer(),
1080 "http://jabber.org/protocol/pubsub#publish");
1081 }
1082
1083 public boolean rosterVersioning() {
1084 if (connection.streamFeatures == null) {
1085 return false;
1086 } else {
1087 return connection.streamFeatures.hasChild("ver");
1088 }
1089 }
1090
1091 public boolean streamhost() {
1092 return connection
1093 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1094 }
1095
1096 public boolean compression() {
1097 return connection.usingCompression;
1098 }
1099 }
1100
1101 public long getLastSessionEstablished() {
1102 long diff;
1103 if (this.lastSessionStarted == 0) {
1104 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1105 } else {
1106 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1107 }
1108 return System.currentTimeMillis() - diff;
1109 }
1110
1111 public long getLastConnect() {
1112 return this.lastConnect;
1113 }
1114
1115 public long getLastPingSent() {
1116 return this.lastPingSent;
1117 }
1118
1119 public long getLastPacketReceived() {
1120 return this.lastPaketReceived;
1121 }
1122
1123 public void sendActive() {
1124 this.sendPacket(new ActivePacket(), null);
1125 }
1126
1127 public void sendInactive() {
1128 this.sendPacket(new InactivePacket(), null);
1129 }
1130}