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.security.SecureRandom;
27import java.util.ArrayList;
28import java.util.Arrays;
29import java.util.HashMap;
30import java.util.Hashtable;
31import java.util.LinkedList;
32import java.util.List;
33import java.util.Map.Entry;
34
35import javax.net.ssl.HostnameVerifier;
36import javax.net.ssl.SSLContext;
37import javax.net.ssl.SSLSocket;
38import javax.net.ssl.SSLSocketFactory;
39import javax.net.ssl.X509TrustManager;
40
41import de.duenndns.ssl.MemorizingTrustManager;
42import eu.siacs.conversations.Config;
43import eu.siacs.conversations.entities.Account;
44import eu.siacs.conversations.services.XmppConnectionService;
45import eu.siacs.conversations.utils.CryptoHelper;
46import eu.siacs.conversations.utils.DNSHelper;
47import eu.siacs.conversations.utils.zlib.ZLibInputStream;
48import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
49import eu.siacs.conversations.xml.Element;
50import eu.siacs.conversations.xml.Tag;
51import eu.siacs.conversations.xml.TagWriter;
52import eu.siacs.conversations.xml.XmlReader;
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 protected Account account;
69
70 private WakeLock wakeLock;
71
72 private SecureRandom mRandom;
73
74 private Socket socket;
75 private XmlReader tagReader;
76 private TagWriter tagWriter;
77
78 private Features features = new Features(this);
79
80 private boolean shouldBind = true;
81 private boolean shouldAuthenticate = true;
82 private Element streamFeatures;
83 private HashMap<String, List<String>> disco = new HashMap<String, List<String>>();
84
85 private String streamId = null;
86 private int smVersion = 3;
87 private SparseArray<String> messageReceipts = new SparseArray<String>();
88
89 private boolean usingCompression = false;
90 private boolean usingEncryption = false;
91
92 private int stanzasReceived = 0;
93 private int stanzasSent = 0;
94
95 private long lastPaketReceived = 0;
96 private long lastPingSent = 0;
97 private long lastConnect = 0;
98 private long lastSessionStarted = 0;
99
100 private int attempt = 0;
101
102 private static final int PACKET_IQ = 0;
103 private static final int PACKET_MESSAGE = 1;
104 private static final int PACKET_PRESENCE = 2;
105
106 private Hashtable<String, PacketReceived> packetCallbacks = new Hashtable<String, PacketReceived>();
107 private OnPresencePacketReceived presenceListener = null;
108 private OnJinglePacketReceived jingleListener = null;
109 private OnIqPacketReceived unregisteredIqListener = null;
110 private OnMessagePacketReceived messageListener = null;
111 private OnStatusChanged statusListener = null;
112 private OnBindListener bindListener = null;
113 private OnMessageAcknowledged acknowledgedListener = null;
114 private MemorizingTrustManager mMemorizingTrustManager;
115 private final Context applicationContext;
116
117 public XmppConnection(Account account, XmppConnectionService service) {
118 this.mRandom = service.getRNG();
119 this.mMemorizingTrustManager = service.getMemorizingTrustManager();
120 this.account = account;
121 this.wakeLock = service.getPowerManager().newWakeLock(
122 PowerManager.PARTIAL_WAKE_LOCK, account.getJid());
123 tagWriter = new TagWriter();
124 applicationContext = service.getApplicationContext();
125 }
126
127 protected void changeStatus(int nextStatus) {
128 if (account.getStatus() != nextStatus) {
129 if ((nextStatus == Account.STATUS_OFFLINE)
130 && (account.getStatus() != Account.STATUS_CONNECTING)
131 && (account.getStatus() != Account.STATUS_ONLINE)
132 && (account.getStatus() != Account.STATUS_DISABLED)) {
133 return;
134 }
135 if (nextStatus == Account.STATUS_ONLINE) {
136 this.attempt = 0;
137 }
138 account.setStatus(nextStatus);
139 if (statusListener != null) {
140 statusListener.onStatusChanged(account);
141 }
142 }
143 }
144
145 protected void connect() {
146 Log.d(Config.LOGTAG, account.getJid() + ": connecting");
147 usingCompression = false;
148 usingEncryption = false;
149 lastConnect = SystemClock.elapsedRealtime();
150 lastPingSent = SystemClock.elapsedRealtime();
151 this.attempt++;
152 try {
153 shouldAuthenticate = shouldBind = !account
154 .isOptionSet(Account.OPTION_REGISTER);
155 tagReader = new XmlReader(wakeLock);
156 tagWriter = new TagWriter();
157 packetCallbacks.clear();
158 this.changeStatus(Account.STATUS_CONNECTING);
159 Bundle result = DNSHelper.getSRVRecord(account.getServer());
160 ArrayList<Parcelable> values = result.getParcelableArrayList("values");
161 if ("timeout".equals(result.getString("error"))) {
162 Log.d(Config.LOGTAG, account.getJid() + ": dns timeout");
163 this.changeStatus(Account.STATUS_OFFLINE);
164 return;
165 } else if (values != null) {
166 int i = 0;
167 boolean socketError = true;
168 while (socketError && values.size() > i) {
169 Bundle namePort = (Bundle) values.get(i);
170 try {
171 String srvRecordServer = namePort.getString("name");
172 int srvRecordPort = namePort.getInt("port");
173 String srvIpServer = namePort.getString("ipv4");
174 InetSocketAddress addr;
175 if (srvIpServer != null) {
176 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
177 Log.d(Config.LOGTAG, account.getJid()
178 + ": using values from dns " + srvRecordServer
179 + "[" + srvIpServer + "]:" + srvRecordPort);
180 } else {
181 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
182 Log.d(Config.LOGTAG, account.getJid()
183 + ": using values from dns "
184 + srvRecordServer + ":" + srvRecordPort);
185 }
186 socket = new Socket();
187 socket.connect(addr, 20000);
188 socketError = false;
189 } catch (UnknownHostException e) {
190 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
191 i++;
192 } catch (IOException e) {
193 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
194 i++;
195 }
196 }
197 if (socketError) {
198 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
199 if (wakeLock.isHeld()) {
200 try {
201 wakeLock.release();
202 } catch (RuntimeException re) {
203 }
204 }
205 return;
206 }
207 } else if (result.containsKey("error")
208 && "nosrv".equals(result.getString("error", null))) {
209 socket = new Socket(account.getServer(), 5222);
210 } else {
211 Log.d(Config.LOGTAG, account.getJid()
212 + ": timeout in DNS resolution");
213 changeStatus(Account.STATUS_OFFLINE);
214 return;
215 }
216 OutputStream out = socket.getOutputStream();
217 tagWriter.setOutputStream(out);
218 InputStream in = socket.getInputStream();
219 tagReader.setInputStream(in);
220 tagWriter.beginDocument();
221 sendStartStream();
222 Tag nextTag;
223 while ((nextTag = tagReader.readTag()) != null) {
224 if (nextTag.isStart("stream")) {
225 processStream(nextTag);
226 break;
227 } else {
228 Log.d(Config.LOGTAG,
229 "found unexpected tag: " + nextTag.getName());
230 return;
231 }
232 }
233 if (socket.isConnected()) {
234 socket.close();
235 }
236 } catch (UnknownHostException e) {
237 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
238 if (wakeLock.isHeld()) {
239 try {
240 wakeLock.release();
241 } catch (RuntimeException re) {
242 }
243 }
244 return;
245 } catch (IOException e) {
246 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
247 this.changeStatus(Account.STATUS_OFFLINE);
248 if (wakeLock.isHeld()) {
249 try {
250 wakeLock.release();
251 } catch (RuntimeException re) {
252 }
253 }
254 return;
255 } catch (NoSuchAlgorithmException e) {
256 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
257 this.changeStatus(Account.STATUS_OFFLINE);
258 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
259 if (wakeLock.isHeld()) {
260 try {
261 wakeLock.release();
262 } catch (RuntimeException re) {
263 }
264 }
265 return;
266 } catch (XmlPullParserException e) {
267 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
268 this.changeStatus(Account.STATUS_OFFLINE);
269 if (wakeLock.isHeld()) {
270 try {
271 wakeLock.release();
272 } catch (RuntimeException re) {
273 }
274 }
275 return;
276 }
277
278 }
279
280 @Override
281 public void run() {
282 connect();
283 }
284
285 private void processStream(Tag currentTag) throws XmlPullParserException,
286 IOException, NoSuchAlgorithmException {
287 Tag nextTag = tagReader.readTag();
288 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
289 if (nextTag.isStart("error")) {
290 processStreamError(nextTag);
291 } else if (nextTag.isStart("features")) {
292 processStreamFeatures(nextTag);
293 } else if (nextTag.isStart("proceed")) {
294 switchOverToTls(nextTag);
295 } else if (nextTag.isStart("compressed")) {
296 switchOverToZLib(nextTag);
297 } else if (nextTag.isStart("success")) {
298 Log.d(Config.LOGTAG, account.getJid() + ": logged in");
299 tagReader.readTag();
300 tagReader.reset();
301 sendStartStream();
302 processStream(tagReader.readTag());
303 break;
304 } else if (nextTag.isStart("failure")) {
305 tagReader.readElement(nextTag);
306 changeStatus(Account.STATUS_UNAUTHORIZED);
307 } else if (nextTag.isStart("challenge")) {
308 String challange = tagReader.readElement(nextTag).getContent();
309 Element response = new Element("response");
310 response.setAttribute("xmlns",
311 "urn:ietf:params:xml:ns:xmpp-sasl");
312 response.setContent(CryptoHelper.saslDigestMd5(account,
313 challange, mRandom));
314 tagWriter.writeElement(response);
315 } else if (nextTag.isStart("enabled")) {
316 Element enabled = tagReader.readElement(nextTag);
317 if ("true".equals(enabled.getAttribute("resume"))) {
318 this.streamId = enabled.getAttribute("id");
319 Log.d(Config.LOGTAG, account.getJid()
320 + ": stream managment(" + smVersion
321 + ") enabled (resumable)");
322 } else {
323 Log.d(Config.LOGTAG, account.getJid()
324 + ": stream managment(" + smVersion + ") enabled");
325 }
326 this.lastSessionStarted = SystemClock.elapsedRealtime();
327 this.stanzasReceived = 0;
328 RequestPacket r = new RequestPacket(smVersion);
329 tagWriter.writeStanzaAsync(r);
330 } else if (nextTag.isStart("resumed")) {
331 lastPaketReceived = SystemClock.elapsedRealtime();
332 Element resumed = tagReader.readElement(nextTag);
333 String h = resumed.getAttribute("h");
334 try {
335 int serverCount = Integer.parseInt(h);
336 if (serverCount != stanzasSent) {
337 Log.d(Config.LOGTAG, account.getJid()
338 + ": session resumed with lost packages");
339 stanzasSent = serverCount;
340 } else {
341 Log.d(Config.LOGTAG, account.getJid()
342 + ": session resumed");
343 }
344 if (acknowledgedListener != null) {
345 for (int i = 0; i < messageReceipts.size(); ++i) {
346 if (serverCount >= messageReceipts.keyAt(i)) {
347 acknowledgedListener.onMessageAcknowledged(
348 account, messageReceipts.valueAt(i));
349 }
350 }
351 }
352 messageReceipts.clear();
353 } catch (NumberFormatException e) {
354
355 }
356 sendInitialPing();
357
358 } else if (nextTag.isStart("r")) {
359 tagReader.readElement(nextTag);
360 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
361 tagWriter.writeStanzaAsync(ack);
362 } else if (nextTag.isStart("a")) {
363 Element ack = tagReader.readElement(nextTag);
364 lastPaketReceived = SystemClock.elapsedRealtime();
365 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
366 String msgId = this.messageReceipts.get(serverSequence);
367 if (msgId != null) {
368 if (this.acknowledgedListener != null) {
369 this.acknowledgedListener.onMessageAcknowledged(
370 account, msgId);
371 }
372 this.messageReceipts.remove(serverSequence);
373 }
374 } else if (nextTag.isStart("failed")) {
375 tagReader.readElement(nextTag);
376 Log.d(Config.LOGTAG, account.getJid() + ": resumption failed");
377 streamId = null;
378 if (account.getStatus() != Account.STATUS_ONLINE) {
379 sendBindRequest();
380 }
381 } else if (nextTag.isStart("iq")) {
382 processIq(nextTag);
383 } else if (nextTag.isStart("message")) {
384 processMessage(nextTag);
385 } else if (nextTag.isStart("presence")) {
386 processPresence(nextTag);
387 }
388 nextTag = tagReader.readTag();
389 }
390 if (account.getStatus() == Account.STATUS_ONLINE) {
391 account.setStatus(Account.STATUS_OFFLINE);
392 if (statusListener != null) {
393 statusListener.onStatusChanged(account);
394 }
395 }
396 }
397
398 private void sendInitialPing() {
399 Log.d(Config.LOGTAG, account.getJid() + ": sending intial ping");
400 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
401 iq.setFrom(account.getFullJid());
402 iq.addChild("ping", "urn:xmpp:ping");
403 this.sendIqPacket(iq, new OnIqPacketReceived() {
404
405 @Override
406 public void onIqPacketReceived(Account account, IqPacket packet) {
407 Log.d(Config.LOGTAG, account.getJid()
408 + ": online with resource " + account.getResource());
409 changeStatus(Account.STATUS_ONLINE);
410 }
411 });
412 }
413
414 private Element processPacket(Tag currentTag, int packetType)
415 throws XmlPullParserException, IOException {
416 Element element;
417 switch (packetType) {
418 case PACKET_IQ:
419 element = new IqPacket();
420 break;
421 case PACKET_MESSAGE:
422 element = new MessagePacket();
423 break;
424 case PACKET_PRESENCE:
425 element = new PresencePacket();
426 break;
427 default:
428 return null;
429 }
430 element.setAttributes(currentTag.getAttributes());
431 Tag nextTag = tagReader.readTag();
432 if (nextTag == null) {
433 throw new IOException("interrupted mid tag");
434 }
435 while (!nextTag.isEnd(element.getName())) {
436 if (!nextTag.isNo()) {
437 Element child = tagReader.readElement(nextTag);
438 String type = currentTag.getAttribute("type");
439 if (packetType == PACKET_IQ
440 && "jingle".equals(child.getName())
441 && ("set".equalsIgnoreCase(type) || "get"
442 .equalsIgnoreCase(type))) {
443 element = new JinglePacket();
444 element.setAttributes(currentTag.getAttributes());
445 }
446 element.addChild(child);
447 }
448 nextTag = tagReader.readTag();
449 if (nextTag == null) {
450 throw new IOException("interrupted mid tag");
451 }
452 }
453 ++stanzasReceived;
454 lastPaketReceived = SystemClock.elapsedRealtime();
455 return element;
456 }
457
458 private void processIq(Tag currentTag) throws XmlPullParserException,
459 IOException {
460 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
461
462 if (packet.getId() == null) {
463 return; // an iq packet without id is definitely invalid
464 }
465
466 if (packet instanceof JinglePacket) {
467 if (this.jingleListener != null) {
468 this.jingleListener.onJinglePacketReceived(account,
469 (JinglePacket) packet);
470 }
471 } else {
472 if (packetCallbacks.containsKey(packet.getId())) {
473 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
474 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
475 .onIqPacketReceived(account, packet);
476 }
477
478 packetCallbacks.remove(packet.getId());
479 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
480 .getType() == IqPacket.TYPE_SET)
481 && this.unregisteredIqListener != null) {
482 this.unregisteredIqListener.onIqPacketReceived(account, packet);
483 }
484 }
485 }
486
487 private void processMessage(Tag currentTag) throws XmlPullParserException,
488 IOException {
489 MessagePacket packet = (MessagePacket) processPacket(currentTag,
490 PACKET_MESSAGE);
491 String id = packet.getAttribute("id");
492 if ((id != null) && (packetCallbacks.containsKey(id))) {
493 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
494 ((OnMessagePacketReceived) packetCallbacks.get(id))
495 .onMessagePacketReceived(account, packet);
496 }
497 packetCallbacks.remove(id);
498 } else if (this.messageListener != null) {
499 this.messageListener.onMessagePacketReceived(account, packet);
500 }
501 }
502
503 private void processPresence(Tag currentTag) throws XmlPullParserException,
504 IOException {
505 PresencePacket packet = (PresencePacket) processPacket(currentTag,
506 PACKET_PRESENCE);
507 String id = packet.getAttribute("id");
508 if ((id != null) && (packetCallbacks.containsKey(id))) {
509 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
510 ((OnPresencePacketReceived) packetCallbacks.get(id))
511 .onPresencePacketReceived(account, packet);
512 }
513 packetCallbacks.remove(id);
514 } else if (this.presenceListener != null) {
515 this.presenceListener.onPresencePacketReceived(account, packet);
516 }
517 }
518
519 private void sendCompressionZlib() throws IOException {
520 Element compress = new Element("compress");
521 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
522 compress.addChild("method").setContent("zlib");
523 tagWriter.writeElement(compress);
524 }
525
526 private void switchOverToZLib(Tag currentTag)
527 throws XmlPullParserException, IOException,
528 NoSuchAlgorithmException {
529 tagReader.readTag(); // read tag close
530 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
531 .getOutputStream()));
532 tagReader
533 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
534
535 sendStartStream();
536 Log.d(Config.LOGTAG, account.getJid() + ": compression enabled");
537 usingCompression = true;
538 processStream(tagReader.readTag());
539 }
540
541 private void sendStartTLS() throws IOException {
542 Tag startTLS = Tag.empty("starttls");
543 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
544 tagWriter.writeTag(startTLS);
545 }
546
547 private SharedPreferences getPreferences() {
548 return PreferenceManager
549 .getDefaultSharedPreferences(applicationContext);
550 }
551
552 private boolean enableLegacySSL() {
553 return getPreferences().getBoolean("enable_legacy_ssl", false);
554 }
555
556 private void switchOverToTls(Tag currentTag) throws XmlPullParserException,
557 IOException {
558 tagReader.readTag();
559 try {
560 SSLContext sc = SSLContext.getInstance("TLS");
561 sc.init(null,
562 new X509TrustManager[]{this.mMemorizingTrustManager},
563 mRandom);
564 SSLSocketFactory factory = sc.getSocketFactory();
565
566 if (factory == null) {
567 throw new IOException("SSLSocketFactory was null");
568 }
569
570 HostnameVerifier verifier = this.mMemorizingTrustManager
571 .wrapHostnameVerifier(new StrictHostnameVerifier());
572 SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,
573 socket.getInetAddress().getHostAddress(), socket.getPort(),
574 true);
575
576 // Support all protocols except legacy SSL.
577 // The min SDK version prevents us having to worry about SSLv2. In
578 // future, this may be
579 // true of SSLv3 as well.
580 final String[] supportProtocols;
581 if (enableLegacySSL()) {
582 supportProtocols = sslSocket.getSupportedProtocols();
583 } else {
584 final List<String> supportedProtocols = new LinkedList<String>(
585 Arrays.asList(sslSocket.getSupportedProtocols()));
586 supportedProtocols.remove("SSLv3");
587 supportProtocols = new String[supportedProtocols.size()];
588 supportedProtocols.toArray(supportProtocols);
589 }
590 sslSocket.setEnabledProtocols(supportProtocols);
591
592 if (verifier != null
593 && !verifier.verify(account.getServer(),
594 sslSocket.getSession())) {
595 sslSocket.close();
596 throw new IOException("host mismatch in TLS connection");
597 }
598 tagReader.setInputStream(sslSocket.getInputStream());
599 tagWriter.setOutputStream(sslSocket.getOutputStream());
600 sendStartStream();
601 Log.d(Config.LOGTAG, account.getJid()
602 + ": TLS connection established");
603 usingEncryption = true;
604 processStream(tagReader.readTag());
605 sslSocket.close();
606 } catch (NoSuchAlgorithmException e1) {
607 e1.printStackTrace();
608 } catch (KeyManagementException e) {
609 e.printStackTrace();
610 }
611 }
612
613 private void sendSaslAuthPlain() throws IOException {
614 String saslString = CryptoHelper.saslPlain(account.getUsername(),
615 account.getPassword());
616 Element auth = new Element("auth");
617 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
618 auth.setAttribute("mechanism", "PLAIN");
619 auth.setContent(saslString);
620 tagWriter.writeElement(auth);
621 }
622
623 private void sendSaslAuthDigestMd5() throws IOException {
624 Element auth = new Element("auth");
625 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
626 auth.setAttribute("mechanism", "DIGEST-MD5");
627 tagWriter.writeElement(auth);
628 }
629
630 private void processStreamFeatures(Tag currentTag)
631 throws XmlPullParserException, IOException {
632 this.streamFeatures = tagReader.readElement(currentTag);
633 if (this.streamFeatures.hasChild("starttls") && !usingEncryption) {
634 sendStartTLS();
635 } else if (compressionAvailable()) {
636 sendCompressionZlib();
637 } else if (this.streamFeatures.hasChild("register")
638 && account.isOptionSet(Account.OPTION_REGISTER)
639 && usingEncryption) {
640 sendRegistryRequest();
641 } else if (!this.streamFeatures.hasChild("register")
642 && account.isOptionSet(Account.OPTION_REGISTER)) {
643 changeStatus(Account.STATUS_REGISTRATION_NOT_SUPPORTED);
644 disconnect(true);
645 } else if (this.streamFeatures.hasChild("mechanisms")
646 && shouldAuthenticate && usingEncryption) {
647 List<String> mechanisms = extractMechanisms(streamFeatures
648 .findChild("mechanisms"));
649 if (mechanisms.contains("PLAIN")) {
650 sendSaslAuthPlain();
651 } else if (mechanisms.contains("DIGEST-MD5")) {
652 sendSaslAuthDigestMd5();
653 }
654 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
655 + smVersion)
656 && streamId != null) {
657 ResumePacket resume = new ResumePacket(this.streamId,
658 stanzasReceived, smVersion);
659 this.tagWriter.writeStanzaAsync(resume);
660 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
661 sendBindRequest();
662 } else {
663 Log.d(Config.LOGTAG, account.getJid()
664 + ": incompatible server. disconnecting");
665 disconnect(true);
666 }
667 }
668
669 private boolean compressionAvailable() {
670 if (!this.streamFeatures.hasChild("compression",
671 "http://jabber.org/features/compress"))
672 return false;
673 if (!ZLibOutputStream.SUPPORTED)
674 return false;
675 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
676 return false;
677
678 Element compression = this.streamFeatures.findChild("compression",
679 "http://jabber.org/features/compress");
680 for (Element child : compression.getChildren()) {
681 if (!"method".equals(child.getName()))
682 continue;
683
684 if ("zlib".equalsIgnoreCase(child.getContent())) {
685 return true;
686 }
687 }
688 return false;
689 }
690
691 private List<String> extractMechanisms(Element stream) {
692 ArrayList<String> mechanisms = new ArrayList<String>(stream
693 .getChildren().size());
694 for (Element child : stream.getChildren()) {
695 mechanisms.add(child.getContent());
696 }
697 return mechanisms;
698 }
699
700 private void sendRegistryRequest() {
701 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
702 register.query("jabber:iq:register");
703 register.setTo(account.getServer());
704 sendIqPacket(register, new OnIqPacketReceived() {
705
706 @Override
707 public void onIqPacketReceived(Account account, IqPacket packet) {
708 Element instructions = packet.query().findChild("instructions");
709 if (packet.query().hasChild("username")
710 && (packet.query().hasChild("password"))) {
711 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
712 Element username = new Element("username")
713 .setContent(account.getUsername());
714 Element password = new Element("password")
715 .setContent(account.getPassword());
716 register.query("jabber:iq:register").addChild(username);
717 register.query().addChild(password);
718 sendIqPacket(register, new OnIqPacketReceived() {
719
720 @Override
721 public void onIqPacketReceived(Account account,
722 IqPacket packet) {
723 if (packet.getType() == IqPacket.TYPE_RESULT) {
724 account.setOption(Account.OPTION_REGISTER,
725 false);
726 changeStatus(Account.STATUS_REGISTRATION_SUCCESSFULL);
727 } else if (packet.hasChild("error")
728 && (packet.findChild("error")
729 .hasChild("conflict"))) {
730 changeStatus(Account.STATUS_REGISTRATION_CONFLICT);
731 } else {
732 changeStatus(Account.STATUS_REGISTRATION_FAILED);
733 Log.d(Config.LOGTAG, packet.toString());
734 }
735 disconnect(true);
736 }
737 });
738 } else {
739 changeStatus(Account.STATUS_REGISTRATION_FAILED);
740 disconnect(true);
741 Log.d(Config.LOGTAG, account.getJid()
742 + ": could not register. instructions are"
743 + instructions.getContent());
744 }
745 }
746 });
747 }
748
749 private void sendBindRequest() throws IOException {
750 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
751 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
752 .addChild("resource").setContent(account.getResource());
753 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
754 @Override
755 public void onIqPacketReceived(Account account, IqPacket packet) {
756 Element bind = packet.findChild("bind");
757 if (bind != null) {
758 Element jid = bind.findChild("jid");
759 if (jid != null && jid.getContent() != null) {
760 account.setResource(jid.getContent().split("/", 2)[1]);
761 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
762 smVersion = 3;
763 EnablePacket enable = new EnablePacket(smVersion);
764 tagWriter.writeStanzaAsync(enable);
765 stanzasSent = 0;
766 messageReceipts.clear();
767 } else if (streamFeatures.hasChild("sm",
768 "urn:xmpp:sm:2")) {
769 smVersion = 2;
770 EnablePacket enable = new EnablePacket(smVersion);
771 tagWriter.writeStanzaAsync(enable);
772 stanzasSent = 0;
773 messageReceipts.clear();
774 }
775 sendServiceDiscoveryInfo(account.getServer());
776 sendServiceDiscoveryItems(account.getServer());
777 if (bindListener != null) {
778 bindListener.onBind(account);
779 }
780 sendInitialPing();
781 } else {
782 disconnect(true);
783 }
784 } else {
785 disconnect(true);
786 }
787 }
788 });
789 if (this.streamFeatures.hasChild("session")) {
790 Log.d(Config.LOGTAG, account.getJid()
791 + ": sending deprecated session");
792 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
793 startSession.addChild("session",
794 "urn:ietf:params:xml:ns:xmpp-session");
795 this.sendUnboundIqPacket(startSession, null);
796 }
797 }
798
799 private void sendServiceDiscoveryInfo(final String server) {
800 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
801 iq.setTo(server);
802 iq.query("http://jabber.org/protocol/disco#info");
803 this.sendIqPacket(iq, new OnIqPacketReceived() {
804
805 @Override
806 public void onIqPacketReceived(Account account, IqPacket packet) {
807 List<Element> elements = packet.query().getChildren();
808 List<String> features = new ArrayList<String>();
809 for (int i = 0; i < elements.size(); ++i) {
810 if (elements.get(i).getName().equals("feature")) {
811 features.add(elements.get(i).getAttribute("var"));
812 }
813 }
814 disco.put(server, features);
815
816 if (account.getServer().equals(server)) {
817 enableAdvancedStreamFeatures();
818 }
819 }
820 });
821 }
822
823 private void enableAdvancedStreamFeatures() {
824 if (getFeatures().carbons()) {
825 sendEnableCarbons();
826 }
827 }
828
829 private void sendServiceDiscoveryItems(final String server) {
830 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
831 iq.setTo(server);
832 iq.query("http://jabber.org/protocol/disco#items");
833 this.sendIqPacket(iq, new OnIqPacketReceived() {
834
835 @Override
836 public void onIqPacketReceived(Account account, IqPacket packet) {
837 List<Element> elements = packet.query().getChildren();
838 for (int i = 0; i < elements.size(); ++i) {
839 if (elements.get(i).getName().equals("item")) {
840 String jid = elements.get(i).getAttribute("jid");
841 sendServiceDiscoveryInfo(jid);
842 }
843 }
844 }
845 });
846 }
847
848 private void sendEnableCarbons() {
849 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
850 iq.addChild("enable", "urn:xmpp:carbons:2");
851 this.sendIqPacket(iq, new OnIqPacketReceived() {
852
853 @Override
854 public void onIqPacketReceived(Account account, IqPacket packet) {
855 if (!packet.hasChild("error")) {
856 Log.d(Config.LOGTAG, account.getJid()
857 + ": successfully enabled carbons");
858 } else {
859 Log.d(Config.LOGTAG, account.getJid()
860 + ": error enableing carbons " + packet.toString());
861 }
862 }
863 });
864 }
865
866 private void processStreamError(Tag currentTag)
867 throws XmlPullParserException, IOException {
868 Element streamError = tagReader.readElement(currentTag);
869 if (streamError != null && streamError.hasChild("conflict")) {
870 String resource = account.getResource().split("\\.")[0];
871 account.setResource(resource + "." + nextRandomId());
872 Log.d(Config.LOGTAG,
873 account.getJid() + ": switching resource due to conflict ("
874 + account.getResource() + ")");
875 }
876 }
877
878 private void sendStartStream() throws IOException {
879 Tag stream = Tag.start("stream:stream");
880 stream.setAttribute("from", account.getJid());
881 stream.setAttribute("to", account.getServer());
882 stream.setAttribute("version", "1.0");
883 stream.setAttribute("xml:lang", "en");
884 stream.setAttribute("xmlns", "jabber:client");
885 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
886 tagWriter.writeTag(stream);
887 }
888
889 private String nextRandomId() {
890 return new BigInteger(50, mRandom).toString(32);
891 }
892
893 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
894 if (packet.getId() == null) {
895 String id = nextRandomId();
896 packet.setAttribute("id", id);
897 }
898 packet.setFrom(account.getFullJid());
899 this.sendPacket(packet, callback);
900 }
901
902 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
903 if (packet.getId() == null) {
904 String id = nextRandomId();
905 packet.setAttribute("id", id);
906 }
907 this.sendPacket(packet, callback);
908 }
909
910 public void sendMessagePacket(MessagePacket packet) {
911 this.sendPacket(packet, null);
912 }
913
914 public void sendPresencePacket(PresencePacket packet) {
915 this.sendPacket(packet, null);
916 }
917
918 private synchronized void sendPacket(final AbstractStanza packet,
919 PacketReceived callback) {
920 if (packet.getName().equals("iq") || packet.getName().equals("message")
921 || packet.getName().equals("presence")) {
922 ++stanzasSent;
923 }
924 tagWriter.writeStanzaAsync(packet);
925 if (packet instanceof MessagePacket && packet.getId() != null
926 && this.streamId != null) {
927 Log.d(Config.LOGTAG, "request delivery report for stanza "
928 + stanzasSent);
929 this.messageReceipts.put(stanzasSent, packet.getId());
930 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
931 }
932 if (callback != null) {
933 if (packet.getId() == null) {
934 packet.setId(nextRandomId());
935 }
936 packetCallbacks.put(packet.getId(), callback);
937 }
938 }
939
940 public void sendPing() {
941 if (streamFeatures.hasChild("sm")) {
942 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
943 } else {
944 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
945 iq.setFrom(account.getFullJid());
946 iq.addChild("ping", "urn:xmpp:ping");
947 this.sendIqPacket(iq, null);
948 }
949 this.lastPingSent = SystemClock.elapsedRealtime();
950 }
951
952 public void setOnMessagePacketReceivedListener(
953 OnMessagePacketReceived listener) {
954 this.messageListener = listener;
955 }
956
957 public void setOnUnregisteredIqPacketReceivedListener(
958 OnIqPacketReceived listener) {
959 this.unregisteredIqListener = listener;
960 }
961
962 public void setOnPresencePacketReceivedListener(
963 OnPresencePacketReceived listener) {
964 this.presenceListener = listener;
965 }
966
967 public void setOnJinglePacketReceivedListener(
968 OnJinglePacketReceived listener) {
969 this.jingleListener = listener;
970 }
971
972 public void setOnStatusChangedListener(OnStatusChanged listener) {
973 this.statusListener = listener;
974 }
975
976 public void setOnBindListener(OnBindListener listener) {
977 this.bindListener = listener;
978 }
979
980 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
981 this.acknowledgedListener = listener;
982 }
983
984 public void disconnect(boolean force) {
985 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting");
986 try {
987 if (force) {
988 socket.close();
989 return;
990 }
991 new Thread(new Runnable() {
992
993 @Override
994 public void run() {
995 if (tagWriter.isActive()) {
996 tagWriter.finish();
997 try {
998 while (!tagWriter.finished()) {
999 Log.d(Config.LOGTAG, "not yet finished");
1000 Thread.sleep(100);
1001 }
1002 tagWriter.writeTag(Tag.end("stream:stream"));
1003 socket.close();
1004 } catch (IOException e) {
1005 Log.d(Config.LOGTAG,
1006 "io exception during disconnect");
1007 } catch (InterruptedException e) {
1008 Log.d(Config.LOGTAG, "interrupted");
1009 }
1010 }
1011 }
1012 }).start();
1013 } catch (IOException e) {
1014 Log.d(Config.LOGTAG, "io exception during disconnect");
1015 }
1016 }
1017
1018 public List<String> findDiscoItemsByFeature(String feature) {
1019 List<String> items = new ArrayList<String>();
1020 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1021 if (cursor.getValue().contains(feature)) {
1022 items.add(cursor.getKey());
1023 }
1024 }
1025 return items;
1026 }
1027
1028 public String findDiscoItemByFeature(String feature) {
1029 List<String> items = findDiscoItemsByFeature(feature);
1030 if (items.size() >= 1) {
1031 return items.get(0);
1032 }
1033 return null;
1034 }
1035
1036 public void r() {
1037 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1038 }
1039
1040 public String getMucServer() {
1041 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1042 }
1043
1044 public int getTimeToNextAttempt() {
1045 int interval = (int) (25 * Math.pow(1.5, attempt));
1046 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1047 return interval - secondsSinceLast;
1048 }
1049
1050 public int getAttempt() {
1051 return this.attempt;
1052 }
1053
1054 public Features getFeatures() {
1055 return this.features;
1056 }
1057
1058 public class Features {
1059 XmppConnection connection;
1060
1061 public Features(XmppConnection connection) {
1062 this.connection = connection;
1063 }
1064
1065 private boolean hasDiscoFeature(String server, String feature) {
1066 if (!connection.disco.containsKey(server)) {
1067 return false;
1068 }
1069 return connection.disco.get(server).contains(feature);
1070 }
1071
1072 public boolean carbons() {
1073 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1074 }
1075
1076 public boolean sm() {
1077 return streamId != null;
1078 }
1079
1080 public boolean csi() {
1081 if (connection.streamFeatures == null) {
1082 return false;
1083 } else {
1084 return connection.streamFeatures.hasChild("csi",
1085 "urn:xmpp:csi:0");
1086 }
1087 }
1088
1089 public boolean pubsub() {
1090 return hasDiscoFeature(account.getServer(),
1091 "http://jabber.org/protocol/pubsub#publish");
1092 }
1093
1094 public boolean rosterVersioning() {
1095 if (connection.streamFeatures == null) {
1096 return false;
1097 } else {
1098 return connection.streamFeatures.hasChild("ver");
1099 }
1100 }
1101
1102 public boolean streamhost() {
1103 return connection
1104 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1105 }
1106
1107 public boolean compression() {
1108 return connection.usingCompression;
1109 }
1110 }
1111
1112 public long getLastSessionEstablished() {
1113 long diff;
1114 if (this.lastSessionStarted == 0) {
1115 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1116 } else {
1117 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1118 }
1119 return System.currentTimeMillis() - diff;
1120 }
1121
1122 public long getLastConnect() {
1123 return this.lastConnect;
1124 }
1125
1126 public long getLastPingSent() {
1127 return this.lastPingSent;
1128 }
1129
1130 public long getLastPacketReceived() {
1131 return this.lastPaketReceived;
1132 }
1133
1134 public void sendActive() {
1135 this.sendPacket(new ActivePacket(), null);
1136 }
1137
1138 public void sendInactive() {
1139 this.sendPacket(new InactivePacket(), null);
1140 }
1141}