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.InetSocketAddress;
8import java.net.Socket;
9import java.net.UnknownHostException;
10import java.security.KeyManagementException;
11import java.security.NoSuchAlgorithmException;
12import java.security.SecureRandom;
13import java.util.ArrayList;
14import java.util.Arrays;
15import java.util.HashMap;
16import java.util.Hashtable;
17import java.util.LinkedList;
18import java.util.List;
19import java.util.Map.Entry;
20
21import javax.net.ssl.HostnameVerifier;
22import javax.net.ssl.SSLContext;
23import javax.net.ssl.SSLSocket;
24import javax.net.ssl.SSLSocketFactory;
25
26import javax.net.ssl.X509TrustManager;
27
28import org.apache.http.conn.ssl.StrictHostnameVerifier;
29import org.xmlpull.v1.XmlPullParserException;
30
31import de.duenndns.ssl.MemorizingTrustManager;
32
33import android.content.Context;
34import android.content.SharedPreferences;
35import android.os.Bundle;
36import android.os.Parcelable;
37import android.os.PowerManager;
38import android.os.PowerManager.WakeLock;
39import android.os.SystemClock;
40import android.preference.PreferenceManager;
41import android.util.Log;
42import android.util.SparseArray;
43import eu.siacs.conversations.Config;
44import eu.siacs.conversations.entities.Account;
45import eu.siacs.conversations.services.XmppConnectionService;
46import eu.siacs.conversations.utils.CryptoHelper;
47import eu.siacs.conversations.utils.DNSHelper;
48import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
49import eu.siacs.conversations.utils.zlib.ZLibInputStream;
50import eu.siacs.conversations.xml.Element;
51import eu.siacs.conversations.xml.Tag;
52import eu.siacs.conversations.xml.TagWriter;
53import eu.siacs.conversations.xml.XmlReader;
54import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
55import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
56import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
57import eu.siacs.conversations.xmpp.stanzas.IqPacket;
58import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
59import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
60import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
61import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
62import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
63import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
64import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
65import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
66
67public class XmppConnection implements Runnable {
68
69 protected Account account;
70
71 private WakeLock wakeLock;
72
73 private SecureRandom mRandom;
74
75 private Socket socket;
76 private XmlReader tagReader;
77 private TagWriter tagWriter;
78
79 private Features features = new Features(this);
80
81 private boolean shouldBind = true;
82 private boolean shouldAuthenticate = true;
83 private Element streamFeatures;
84 private HashMap<String, List<String>> disco = new HashMap<String, List<String>>();
85
86 private String streamId = null;
87 private int smVersion = 3;
88 private SparseArray<String> messageReceipts = new SparseArray<String>();
89
90 private boolean usingCompression = false;
91 private boolean usingEncryption = false;
92
93 private int stanzasReceived = 0;
94 private int stanzasSent = 0;
95
96 private long lastPaketReceived = 0;
97 private long lastPingSent = 0;
98 private long lastConnect = 0;
99 private long lastSessionStarted = 0;
100
101 private int attempt = 0;
102
103 private static final int PACKET_IQ = 0;
104 private static final int PACKET_MESSAGE = 1;
105 private static final int PACKET_PRESENCE = 2;
106
107 private Hashtable<String, PacketReceived> packetCallbacks = new Hashtable<String, PacketReceived>();
108 private OnPresencePacketReceived presenceListener = null;
109 private OnJinglePacketReceived jingleListener = null;
110 private OnIqPacketReceived unregisteredIqListener = null;
111 private OnMessagePacketReceived messageListener = null;
112 private OnStatusChanged statusListener = null;
113 private OnBindListener bindListener = null;
114 private OnMessageAcknowledged acknowledgedListener = null;
115 private MemorizingTrustManager mMemorizingTrustManager;
116 private final Context applicationContext;
117
118 public XmppConnection(Account account, XmppConnectionService service) {
119 this.mRandom = service.getRNG();
120 this.mMemorizingTrustManager = service.getMemorizingTrustManager();
121 this.account = account;
122 this.wakeLock = service.getPowerManager().newWakeLock(
123 PowerManager.PARTIAL_WAKE_LOCK, account.getJid());
124 tagWriter = new TagWriter();
125 applicationContext = service.getApplicationContext();
126 }
127
128 protected void changeStatus(int nextStatus) {
129 if (account.getStatus() != nextStatus) {
130 if ((nextStatus == Account.STATUS_OFFLINE)
131 && (account.getStatus() != Account.STATUS_CONNECTING)
132 && (account.getStatus() != Account.STATUS_ONLINE)
133 && (account.getStatus() != Account.STATUS_DISABLED)) {
134 return;
135 }
136 if (nextStatus == Account.STATUS_ONLINE) {
137 this.attempt = 0;
138 }
139 account.setStatus(nextStatus);
140 if (statusListener != null) {
141 statusListener.onStatusChanged(account);
142 }
143 }
144 }
145
146 protected void connect() {
147 Log.d(Config.LOGTAG, account.getJid() + ": connecting");
148 usingCompression = false;
149 usingEncryption = false;
150 lastConnect = SystemClock.elapsedRealtime();
151 lastPingSent = SystemClock.elapsedRealtime();
152 this.attempt++;
153 try {
154 shouldAuthenticate = shouldBind = !account
155 .isOptionSet(Account.OPTION_REGISTER);
156 tagReader = new XmlReader(wakeLock);
157 tagWriter = new TagWriter();
158 packetCallbacks.clear();
159 this.changeStatus(Account.STATUS_CONNECTING);
160 Bundle result = DNSHelper.getSRVRecord(account.getServer());
161 ArrayList<Parcelable> values = result.getParcelableArrayList("values");
162 if ("timeout".equals(result.getString("error"))) {
163 Log.d(Config.LOGTAG, account.getJid() + ": dns timeout");
164 this.changeStatus(Account.STATUS_OFFLINE);
165 return;
166 } else if (values != null) {
167 int i = 0;
168 boolean socketError = true;
169 while (socketError && values.size() > i) {
170 Bundle namePort = (Bundle) values.get(i);
171 try {
172 String srvRecordServer = namePort.getString("name");
173 int srvRecordPort = namePort.getInt("port");
174 String srvIpServer = namePort.getString("ipv4");
175 InetSocketAddress addr;
176 if (srvIpServer!=null) {
177 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
178 Log.d(Config.LOGTAG, account.getJid()
179 + ": using values from dns " + srvRecordServer
180 + "[" + srvIpServer + "]:" + srvRecordPort);
181 } else {
182 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
183 Log.d(Config.LOGTAG, account.getJid()
184 + ": using values from dns "
185 + srvRecordServer + ":" + srvRecordPort);
186 }
187 socket = new Socket();
188 socket.connect(addr, 20000);
189 socketError = false;
190 } catch (UnknownHostException e) {
191 i++;
192 } catch (IOException e) {
193 i++;
194 }
195 }
196 if (socketError) {
197 throw new IOException();
198 }
199 } else if (result.containsKey("error")
200 && "nosrv".equals(result.getString("error", null))) {
201 socket = new Socket(account.getServer(), 5222);
202 } else {
203 Log.d(Config.LOGTAG, account.getJid()
204 + ": timeout in DNS resolution");
205 changeStatus(Account.STATUS_OFFLINE);
206 return;
207 }
208 OutputStream out = socket.getOutputStream();
209 tagWriter.setOutputStream(out);
210 InputStream in = socket.getInputStream();
211 tagReader.setInputStream(in);
212 tagWriter.beginDocument();
213 sendStartStream();
214 Tag nextTag;
215 while ((nextTag = tagReader.readTag()) != null) {
216 if (nextTag.isStart("stream")) {
217 processStream(nextTag);
218 break;
219 } else {
220 Log.d(Config.LOGTAG,
221 "found unexpected tag: " + nextTag.getName());
222 return;
223 }
224 }
225 if (socket.isConnected()) {
226 socket.close();
227 }
228 } catch (UnknownHostException e) {
229 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
230 if (wakeLock.isHeld()) {
231 try {
232 wakeLock.release();
233 } catch (RuntimeException re) {
234 }
235 }
236 return;
237 } catch (IOException e) {
238 this.changeStatus(Account.STATUS_OFFLINE);
239 if (wakeLock.isHeld()) {
240 try {
241 wakeLock.release();
242 } catch (RuntimeException re) {
243 }
244 }
245 return;
246 } catch (NoSuchAlgorithmException e) {
247 this.changeStatus(Account.STATUS_OFFLINE);
248 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
249 if (wakeLock.isHeld()) {
250 try {
251 wakeLock.release();
252 } catch (RuntimeException re) {
253 }
254 }
255 return;
256 } catch (XmlPullParserException e) {
257 this.changeStatus(Account.STATUS_OFFLINE);
258 Log.d(Config.LOGTAG, "xml exception " + e.getMessage());
259 if (wakeLock.isHeld()) {
260 try {
261 wakeLock.release();
262 } catch (RuntimeException re) {
263 }
264 }
265 return;
266 }
267
268 }
269
270 @Override
271 public void run() {
272 connect();
273 }
274
275 private void processStream(Tag currentTag) throws XmlPullParserException,
276 IOException, NoSuchAlgorithmException {
277 Tag nextTag = tagReader.readTag();
278 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
279 if (nextTag.isStart("error")) {
280 processStreamError(nextTag);
281 } else if (nextTag.isStart("features")) {
282 processStreamFeatures(nextTag);
283 } else if (nextTag.isStart("proceed")) {
284 switchOverToTls(nextTag);
285 } else if (nextTag.isStart("compressed")) {
286 switchOverToZLib(nextTag);
287 } else if (nextTag.isStart("success")) {
288 Log.d(Config.LOGTAG, account.getJid() + ": logged in");
289 tagReader.readTag();
290 tagReader.reset();
291 sendStartStream();
292 processStream(tagReader.readTag());
293 break;
294 } else if (nextTag.isStart("failure")) {
295 tagReader.readElement(nextTag);
296 changeStatus(Account.STATUS_UNAUTHORIZED);
297 } else if (nextTag.isStart("challenge")) {
298 String challange = tagReader.readElement(nextTag).getContent();
299 Element response = new Element("response");
300 response.setAttribute("xmlns",
301 "urn:ietf:params:xml:ns:xmpp-sasl");
302 response.setContent(CryptoHelper.saslDigestMd5(account,
303 challange, mRandom));
304 tagWriter.writeElement(response);
305 } else if (nextTag.isStart("enabled")) {
306 Element enabled = tagReader.readElement(nextTag);
307 if ("true".equals(enabled.getAttribute("resume"))) {
308 this.streamId = enabled.getAttribute("id");
309 Log.d(Config.LOGTAG, account.getJid()
310 + ": stream managment(" + smVersion
311 + ") enabled (resumable)");
312 } else {
313 Log.d(Config.LOGTAG, account.getJid()
314 + ": stream managment(" + smVersion + ") enabled");
315 }
316 this.lastSessionStarted = SystemClock.elapsedRealtime();
317 this.stanzasReceived = 0;
318 RequestPacket r = new RequestPacket(smVersion);
319 tagWriter.writeStanzaAsync(r);
320 } else if (nextTag.isStart("resumed")) {
321 lastPaketReceived = SystemClock.elapsedRealtime();
322 Element resumed = tagReader.readElement(nextTag);
323 String h = resumed.getAttribute("h");
324 try {
325 int serverCount = Integer.parseInt(h);
326 if (serverCount != stanzasSent) {
327 Log.d(Config.LOGTAG, account.getJid()
328 + ": session resumed with lost packages");
329 stanzasSent = serverCount;
330 } else {
331 Log.d(Config.LOGTAG, account.getJid()
332 + ": session resumed");
333 }
334 if (acknowledgedListener != null) {
335 for (int i = 0; i < messageReceipts.size(); ++i) {
336 if (serverCount >= messageReceipts.keyAt(i)) {
337 acknowledgedListener.onMessageAcknowledged(
338 account, messageReceipts.valueAt(i));
339 }
340 }
341 }
342 messageReceipts.clear();
343 } catch (NumberFormatException e) {
344
345 }
346 sendInitialPing();
347
348 } else if (nextTag.isStart("r")) {
349 tagReader.readElement(nextTag);
350 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
351 tagWriter.writeStanzaAsync(ack);
352 } else if (nextTag.isStart("a")) {
353 Element ack = tagReader.readElement(nextTag);
354 lastPaketReceived = SystemClock.elapsedRealtime();
355 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
356 String msgId = this.messageReceipts.get(serverSequence);
357 if (msgId != null) {
358 if (this.acknowledgedListener != null) {
359 this.acknowledgedListener.onMessageAcknowledged(
360 account, msgId);
361 }
362 this.messageReceipts.remove(serverSequence);
363 }
364 } else if (nextTag.isStart("failed")) {
365 tagReader.readElement(nextTag);
366 Log.d(Config.LOGTAG, account.getJid() + ": resumption failed");
367 streamId = null;
368 if (account.getStatus() != Account.STATUS_ONLINE) {
369 sendBindRequest();
370 }
371 } else if (nextTag.isStart("iq")) {
372 processIq(nextTag);
373 } else if (nextTag.isStart("message")) {
374 processMessage(nextTag);
375 } else if (nextTag.isStart("presence")) {
376 processPresence(nextTag);
377 }
378 nextTag = tagReader.readTag();
379 }
380 if (account.getStatus() == Account.STATUS_ONLINE) {
381 account.setStatus(Account.STATUS_OFFLINE);
382 if (statusListener != null) {
383 statusListener.onStatusChanged(account);
384 }
385 }
386 }
387
388 private void sendInitialPing() {
389 Log.d(Config.LOGTAG, account.getJid() + ": sending intial ping");
390 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
391 iq.setFrom(account.getFullJid());
392 iq.addChild("ping", "urn:xmpp:ping");
393 this.sendIqPacket(iq, new OnIqPacketReceived() {
394
395 @Override
396 public void onIqPacketReceived(Account account, IqPacket packet) {
397 Log.d(Config.LOGTAG, account.getJid()
398 + ": online with resource " + account.getResource());
399 changeStatus(Account.STATUS_ONLINE);
400 }
401 });
402 }
403
404 private Element processPacket(Tag currentTag, int packetType)
405 throws XmlPullParserException, IOException {
406 Element element;
407 switch (packetType) {
408 case PACKET_IQ:
409 element = new IqPacket();
410 break;
411 case PACKET_MESSAGE:
412 element = new MessagePacket();
413 break;
414 case PACKET_PRESENCE:
415 element = new PresencePacket();
416 break;
417 default:
418 return null;
419 }
420 element.setAttributes(currentTag.getAttributes());
421 Tag nextTag = tagReader.readTag();
422 if (nextTag == null) {
423 throw new IOException("interrupted mid tag");
424 }
425 while (!nextTag.isEnd(element.getName())) {
426 if (!nextTag.isNo()) {
427 Element child = tagReader.readElement(nextTag);
428 String type = currentTag.getAttribute("type");
429 if (packetType == PACKET_IQ
430 && "jingle".equals(child.getName())
431 && ("set".equalsIgnoreCase(type) || "get"
432 .equalsIgnoreCase(type))) {
433 element = new JinglePacket();
434 element.setAttributes(currentTag.getAttributes());
435 }
436 element.addChild(child);
437 }
438 nextTag = tagReader.readTag();
439 if (nextTag == null) {
440 throw new IOException("interrupted mid tag");
441 }
442 }
443 ++stanzasReceived;
444 lastPaketReceived = SystemClock.elapsedRealtime();
445 return element;
446 }
447
448 private void processIq(Tag currentTag) throws XmlPullParserException,
449 IOException {
450 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
451
452 if (packet.getId() == null) {
453 return; // an iq packet without id is definitely invalid
454 }
455
456 if (packet instanceof JinglePacket) {
457 if (this.jingleListener != null) {
458 this.jingleListener.onJinglePacketReceived(account,
459 (JinglePacket) packet);
460 }
461 } else {
462 if (packetCallbacks.containsKey(packet.getId())) {
463 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
464 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
465 .onIqPacketReceived(account, packet);
466 }
467
468 packetCallbacks.remove(packet.getId());
469 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
470 .getType() == IqPacket.TYPE_SET)
471 && this.unregisteredIqListener != null) {
472 this.unregisteredIqListener.onIqPacketReceived(account, packet);
473 }
474 }
475 }
476
477 private void processMessage(Tag currentTag) throws XmlPullParserException,
478 IOException {
479 MessagePacket packet = (MessagePacket) processPacket(currentTag,
480 PACKET_MESSAGE);
481 String id = packet.getAttribute("id");
482 if ((id != null) && (packetCallbacks.containsKey(id))) {
483 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
484 ((OnMessagePacketReceived) packetCallbacks.get(id))
485 .onMessagePacketReceived(account, packet);
486 }
487 packetCallbacks.remove(id);
488 } else if (this.messageListener != null) {
489 this.messageListener.onMessagePacketReceived(account, packet);
490 }
491 }
492
493 private void processPresence(Tag currentTag) throws XmlPullParserException,
494 IOException {
495 PresencePacket packet = (PresencePacket) processPacket(currentTag,
496 PACKET_PRESENCE);
497 String id = packet.getAttribute("id");
498 if ((id != null) && (packetCallbacks.containsKey(id))) {
499 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
500 ((OnPresencePacketReceived) packetCallbacks.get(id))
501 .onPresencePacketReceived(account, packet);
502 }
503 packetCallbacks.remove(id);
504 } else if (this.presenceListener != null) {
505 this.presenceListener.onPresencePacketReceived(account, packet);
506 }
507 }
508
509 private void sendCompressionZlib() throws IOException {
510 Element compress = new Element("compress");
511 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
512 compress.addChild("method").setContent("zlib");
513 tagWriter.writeElement(compress);
514 }
515
516 private void switchOverToZLib(Tag currentTag)
517 throws XmlPullParserException, IOException,
518 NoSuchAlgorithmException {
519 tagReader.readTag(); // read tag close
520 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
521 .getOutputStream()));
522 tagReader
523 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
524
525 sendStartStream();
526 Log.d(Config.LOGTAG, account.getJid() + ": compression enabled");
527 usingCompression = true;
528 processStream(tagReader.readTag());
529 }
530
531 private void sendStartTLS() throws IOException {
532 Tag startTLS = Tag.empty("starttls");
533 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
534 tagWriter.writeTag(startTLS);
535 }
536
537 private SharedPreferences getPreferences() {
538 return PreferenceManager
539 .getDefaultSharedPreferences(applicationContext);
540 }
541
542 private boolean enableLegacySSL() {
543 return getPreferences().getBoolean("enable_legacy_ssl", false);
544 }
545
546 private void switchOverToTls(Tag currentTag) throws XmlPullParserException,
547 IOException {
548 tagReader.readTag();
549 try {
550 SSLContext sc = SSLContext.getInstance("TLS");
551 sc.init(null,
552 new X509TrustManager[] { this.mMemorizingTrustManager },
553 mRandom);
554 SSLSocketFactory factory = sc.getSocketFactory();
555
556 HostnameVerifier verifier = this.mMemorizingTrustManager
557 .wrapHostnameVerifier(new StrictHostnameVerifier());
558 SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,
559 socket.getInetAddress().getHostAddress(), socket.getPort(),
560 true);
561
562 // Support all protocols except legacy SSL.
563 // The min SDK version prevents us having to worry about SSLv2. In
564 // future, this may be
565 // true of SSLv3 as well.
566 final String[] supportProtocols;
567 if (enableLegacySSL()) {
568 supportProtocols = sslSocket.getSupportedProtocols();
569 } else {
570 final List<String> supportedProtocols = new LinkedList<String>(
571 Arrays.asList(sslSocket.getSupportedProtocols()));
572 supportedProtocols.remove("SSLv3");
573 supportProtocols = new String[supportedProtocols.size()];
574 supportedProtocols.toArray(supportProtocols);
575 }
576 sslSocket.setEnabledProtocols(supportProtocols);
577
578 if (verifier != null
579 && !verifier.verify(account.getServer(),
580 sslSocket.getSession())) {
581 Log.d(Config.LOGTAG, account.getJid()
582 + ": host mismatch in TLS connection");
583 sslSocket.close();
584 throw new IOException();
585 }
586 tagReader.setInputStream(sslSocket.getInputStream());
587 tagWriter.setOutputStream(sslSocket.getOutputStream());
588 sendStartStream();
589 Log.d(Config.LOGTAG, account.getJid()
590 + ": TLS connection established");
591 usingEncryption = true;
592 processStream(tagReader.readTag());
593 sslSocket.close();
594 } catch (NoSuchAlgorithmException e1) {
595 e1.printStackTrace();
596 } catch (KeyManagementException e) {
597 e.printStackTrace();
598 }
599 }
600
601 private void sendSaslAuthPlain() throws IOException {
602 String saslString = CryptoHelper.saslPlain(account.getUsername(),
603 account.getPassword());
604 Element auth = new Element("auth");
605 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
606 auth.setAttribute("mechanism", "PLAIN");
607 auth.setContent(saslString);
608 tagWriter.writeElement(auth);
609 }
610
611 private void sendSaslAuthDigestMd5() throws IOException {
612 Element auth = new Element("auth");
613 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
614 auth.setAttribute("mechanism", "DIGEST-MD5");
615 tagWriter.writeElement(auth);
616 }
617
618 private void processStreamFeatures(Tag currentTag)
619 throws XmlPullParserException, IOException {
620 this.streamFeatures = tagReader.readElement(currentTag);
621 if (this.streamFeatures.hasChild("starttls") && !usingEncryption) {
622 sendStartTLS();
623 } else if (compressionAvailable()) {
624 sendCompressionZlib();
625 } else if (this.streamFeatures.hasChild("register")
626 && account.isOptionSet(Account.OPTION_REGISTER)
627 && usingEncryption) {
628 sendRegistryRequest();
629 } else if (!this.streamFeatures.hasChild("register")
630 && account.isOptionSet(Account.OPTION_REGISTER)) {
631 changeStatus(Account.STATUS_REGISTRATION_NOT_SUPPORTED);
632 disconnect(true);
633 } else if (this.streamFeatures.hasChild("mechanisms")
634 && shouldAuthenticate && usingEncryption) {
635 List<String> mechanisms = extractMechanisms(streamFeatures
636 .findChild("mechanisms"));
637 if (mechanisms.contains("PLAIN")) {
638 sendSaslAuthPlain();
639 } else if (mechanisms.contains("DIGEST-MD5")) {
640 sendSaslAuthDigestMd5();
641 }
642 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
643 + smVersion)
644 && streamId != null) {
645 ResumePacket resume = new ResumePacket(this.streamId,
646 stanzasReceived, smVersion);
647 this.tagWriter.writeStanzaAsync(resume);
648 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
649 sendBindRequest();
650 } else {
651 Log.d(Config.LOGTAG, account.getJid()
652 + ": incompatible server. disconnecting");
653 disconnect(true);
654 }
655 }
656
657 private boolean compressionAvailable() {
658 if (!this.streamFeatures.hasChild("compression",
659 "http://jabber.org/features/compress"))
660 return false;
661 if (!ZLibOutputStream.SUPPORTED)
662 return false;
663 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
664 return false;
665
666 Element compression = this.streamFeatures.findChild("compression",
667 "http://jabber.org/features/compress");
668 for (Element child : compression.getChildren()) {
669 if (!"method".equals(child.getName()))
670 continue;
671
672 if ("zlib".equalsIgnoreCase(child.getContent())) {
673 return true;
674 }
675 }
676 return false;
677 }
678
679 private List<String> extractMechanisms(Element stream) {
680 ArrayList<String> mechanisms = new ArrayList<String>(stream
681 .getChildren().size());
682 for (Element child : stream.getChildren()) {
683 mechanisms.add(child.getContent());
684 }
685 return mechanisms;
686 }
687
688 private void sendRegistryRequest() {
689 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
690 register.query("jabber:iq:register");
691 register.setTo(account.getServer());
692 sendIqPacket(register, new OnIqPacketReceived() {
693
694 @Override
695 public void onIqPacketReceived(Account account, IqPacket packet) {
696 Element instructions = packet.query().findChild("instructions");
697 if (packet.query().hasChild("username")
698 && (packet.query().hasChild("password"))) {
699 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
700 Element username = new Element("username")
701 .setContent(account.getUsername());
702 Element password = new Element("password")
703 .setContent(account.getPassword());
704 register.query("jabber:iq:register").addChild(username);
705 register.query().addChild(password);
706 sendIqPacket(register, new OnIqPacketReceived() {
707
708 @Override
709 public void onIqPacketReceived(Account account,
710 IqPacket packet) {
711 if (packet.getType() == IqPacket.TYPE_RESULT) {
712 account.setOption(Account.OPTION_REGISTER,
713 false);
714 changeStatus(Account.STATUS_REGISTRATION_SUCCESSFULL);
715 } else if (packet.hasChild("error")
716 && (packet.findChild("error")
717 .hasChild("conflict"))) {
718 changeStatus(Account.STATUS_REGISTRATION_CONFLICT);
719 } else {
720 changeStatus(Account.STATUS_REGISTRATION_FAILED);
721 Log.d(Config.LOGTAG, packet.toString());
722 }
723 disconnect(true);
724 }
725 });
726 } else {
727 changeStatus(Account.STATUS_REGISTRATION_FAILED);
728 disconnect(true);
729 Log.d(Config.LOGTAG, account.getJid()
730 + ": could not register. instructions are"
731 + instructions.getContent());
732 }
733 }
734 });
735 }
736
737 private void sendBindRequest() throws IOException {
738 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
739 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
740 .addChild("resource").setContent(account.getResource());
741 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
742 @Override
743 public void onIqPacketReceived(Account account, IqPacket packet) {
744 Element bind = packet.findChild("bind");
745 if (bind != null) {
746 Element jid = bind.findChild("jid");
747 if (jid != null && jid.getContent() != null) {
748 account.setResource(jid.getContent().split("/", 2)[1]);
749 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
750 smVersion = 3;
751 EnablePacket enable = new EnablePacket(smVersion);
752 tagWriter.writeStanzaAsync(enable);
753 stanzasSent = 0;
754 messageReceipts.clear();
755 } else if (streamFeatures.hasChild("sm",
756 "urn:xmpp:sm:2")) {
757 smVersion = 2;
758 EnablePacket enable = new EnablePacket(smVersion);
759 tagWriter.writeStanzaAsync(enable);
760 stanzasSent = 0;
761 messageReceipts.clear();
762 }
763 sendServiceDiscoveryInfo(account.getServer());
764 sendServiceDiscoveryItems(account.getServer());
765 if (bindListener != null) {
766 bindListener.onBind(account);
767 }
768 sendInitialPing();
769 } else {
770 disconnect(true);
771 }
772 } else {
773 disconnect(true);
774 }
775 }
776 });
777 if (this.streamFeatures.hasChild("session")) {
778 Log.d(Config.LOGTAG, account.getJid()
779 + ": sending deprecated session");
780 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
781 startSession.addChild("session",
782 "urn:ietf:params:xml:ns:xmpp-session");
783 this.sendUnboundIqPacket(startSession, null);
784 }
785 }
786
787 private void sendServiceDiscoveryInfo(final String server) {
788 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
789 iq.setTo(server);
790 iq.query("http://jabber.org/protocol/disco#info");
791 this.sendIqPacket(iq, new OnIqPacketReceived() {
792
793 @Override
794 public void onIqPacketReceived(Account account, IqPacket packet) {
795 List<Element> elements = packet.query().getChildren();
796 List<String> features = new ArrayList<String>();
797 for (int i = 0; i < elements.size(); ++i) {
798 if (elements.get(i).getName().equals("feature")) {
799 features.add(elements.get(i).getAttribute("var"));
800 }
801 }
802 disco.put(server, features);
803
804 if (account.getServer().equals(server)) {
805 enableAdvancedStreamFeatures();
806 }
807 }
808 });
809 }
810
811 private void enableAdvancedStreamFeatures() {
812 if (getFeatures().carbons()) {
813 sendEnableCarbons();
814 }
815 }
816
817 private void sendServiceDiscoveryItems(final String server) {
818 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
819 iq.setTo(server);
820 iq.query("http://jabber.org/protocol/disco#items");
821 this.sendIqPacket(iq, new OnIqPacketReceived() {
822
823 @Override
824 public void onIqPacketReceived(Account account, IqPacket packet) {
825 List<Element> elements = packet.query().getChildren();
826 for (int i = 0; i < elements.size(); ++i) {
827 if (elements.get(i).getName().equals("item")) {
828 String jid = elements.get(i).getAttribute("jid");
829 sendServiceDiscoveryInfo(jid);
830 }
831 }
832 }
833 });
834 }
835
836 private void sendEnableCarbons() {
837 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
838 iq.addChild("enable", "urn:xmpp:carbons:2");
839 this.sendIqPacket(iq, new OnIqPacketReceived() {
840
841 @Override
842 public void onIqPacketReceived(Account account, IqPacket packet) {
843 if (!packet.hasChild("error")) {
844 Log.d(Config.LOGTAG, account.getJid()
845 + ": successfully enabled carbons");
846 } else {
847 Log.d(Config.LOGTAG, account.getJid()
848 + ": error enableing carbons " + packet.toString());
849 }
850 }
851 });
852 }
853
854 private void processStreamError(Tag currentTag)
855 throws XmlPullParserException, IOException {
856 Element streamError = tagReader.readElement(currentTag);
857 if (streamError != null && streamError.hasChild("conflict")) {
858 String resource = account.getResource().split("\\.")[0];
859 account.setResource(resource + "." + nextRandomId());
860 Log.d(Config.LOGTAG,
861 account.getJid() + ": switching resource due to conflict ("
862 + account.getResource() + ")");
863 }
864 }
865
866 private void sendStartStream() throws IOException {
867 Tag stream = Tag.start("stream:stream");
868 stream.setAttribute("from", account.getJid());
869 stream.setAttribute("to", account.getServer());
870 stream.setAttribute("version", "1.0");
871 stream.setAttribute("xml:lang", "en");
872 stream.setAttribute("xmlns", "jabber:client");
873 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
874 tagWriter.writeTag(stream);
875 }
876
877 private String nextRandomId() {
878 return new BigInteger(50, mRandom).toString(32);
879 }
880
881 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
882 if (packet.getId() == null) {
883 String id = nextRandomId();
884 packet.setAttribute("id", id);
885 }
886 packet.setFrom(account.getFullJid());
887 this.sendPacket(packet, callback);
888 }
889
890 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
891 if (packet.getId() == null) {
892 String id = nextRandomId();
893 packet.setAttribute("id", id);
894 }
895 this.sendPacket(packet, callback);
896 }
897
898 public void sendMessagePacket(MessagePacket packet) {
899 this.sendPacket(packet, null);
900 }
901
902 public void sendPresencePacket(PresencePacket packet) {
903 this.sendPacket(packet, null);
904 }
905
906 private synchronized void sendPacket(final AbstractStanza packet,
907 PacketReceived callback) {
908 if (packet.getName().equals("iq") || packet.getName().equals("message")
909 || packet.getName().equals("presence")) {
910 ++stanzasSent;
911 }
912 tagWriter.writeStanzaAsync(packet);
913 if (packet instanceof MessagePacket && packet.getId() != null
914 && this.streamId != null) {
915 Log.d(Config.LOGTAG, "request delivery report for stanza "
916 + stanzasSent);
917 this.messageReceipts.put(stanzasSent, packet.getId());
918 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
919 }
920 if (callback != null) {
921 if (packet.getId() == null) {
922 packet.setId(nextRandomId());
923 }
924 packetCallbacks.put(packet.getId(), callback);
925 }
926 }
927
928 public void sendPing() {
929 if (streamFeatures.hasChild("sm")) {
930 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
931 } else {
932 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
933 iq.setFrom(account.getFullJid());
934 iq.addChild("ping", "urn:xmpp:ping");
935 this.sendIqPacket(iq, null);
936 }
937 this.lastPingSent = SystemClock.elapsedRealtime();
938 }
939
940 public void setOnMessagePacketReceivedListener(
941 OnMessagePacketReceived listener) {
942 this.messageListener = listener;
943 }
944
945 public void setOnUnregisteredIqPacketReceivedListener(
946 OnIqPacketReceived listener) {
947 this.unregisteredIqListener = listener;
948 }
949
950 public void setOnPresencePacketReceivedListener(
951 OnPresencePacketReceived listener) {
952 this.presenceListener = listener;
953 }
954
955 public void setOnJinglePacketReceivedListener(
956 OnJinglePacketReceived listener) {
957 this.jingleListener = listener;
958 }
959
960 public void setOnStatusChangedListener(OnStatusChanged listener) {
961 this.statusListener = listener;
962 }
963
964 public void setOnBindListener(OnBindListener listener) {
965 this.bindListener = listener;
966 }
967
968 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
969 this.acknowledgedListener = listener;
970 }
971
972 public void disconnect(boolean force) {
973 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting");
974 try {
975 if (force) {
976 socket.close();
977 return;
978 }
979 new Thread(new Runnable() {
980
981 @Override
982 public void run() {
983 if (tagWriter.isActive()) {
984 tagWriter.finish();
985 try {
986 while (!tagWriter.finished()) {
987 Log.d(Config.LOGTAG, "not yet finished");
988 Thread.sleep(100);
989 }
990 tagWriter.writeTag(Tag.end("stream:stream"));
991 socket.close();
992 } catch (IOException e) {
993 Log.d(Config.LOGTAG,
994 "io exception during disconnect");
995 } catch (InterruptedException e) {
996 Log.d(Config.LOGTAG, "interrupted");
997 }
998 }
999 }
1000 }).start();
1001 } catch (IOException e) {
1002 Log.d(Config.LOGTAG, "io exception during disconnect");
1003 }
1004 }
1005
1006 public List<String> findDiscoItemsByFeature(String feature) {
1007 List<String> items = new ArrayList<String>();
1008 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1009 if (cursor.getValue().contains(feature)) {
1010 items.add(cursor.getKey());
1011 }
1012 }
1013 return items;
1014 }
1015
1016 public String findDiscoItemByFeature(String feature) {
1017 List<String> items = findDiscoItemsByFeature(feature);
1018 if (items.size() >= 1) {
1019 return items.get(0);
1020 }
1021 return null;
1022 }
1023
1024 public void r() {
1025 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1026 }
1027
1028 public String getMucServer() {
1029 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1030 }
1031
1032 public int getTimeToNextAttempt() {
1033 int interval = (int) (25 * Math.pow(1.5, attempt));
1034 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1035 return interval - secondsSinceLast;
1036 }
1037
1038 public int getAttempt() {
1039 return this.attempt;
1040 }
1041
1042 public Features getFeatures() {
1043 return this.features;
1044 }
1045
1046 public class Features {
1047 XmppConnection connection;
1048
1049 public Features(XmppConnection connection) {
1050 this.connection = connection;
1051 }
1052
1053 private boolean hasDiscoFeature(String server, String feature) {
1054 if (!connection.disco.containsKey(server)) {
1055 return false;
1056 }
1057 return connection.disco.get(server).contains(feature);
1058 }
1059
1060 public boolean carbons() {
1061 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1062 }
1063
1064 public boolean sm() {
1065 return streamId != null;
1066 }
1067
1068 public boolean csi() {
1069 if (connection.streamFeatures == null) {
1070 return false;
1071 } else {
1072 return connection.streamFeatures.hasChild("csi",
1073 "urn:xmpp:csi:0");
1074 }
1075 }
1076
1077 public boolean pubsub() {
1078 return hasDiscoFeature(account.getServer(),
1079 "http://jabber.org/protocol/pubsub#publish");
1080 }
1081
1082 public boolean rosterVersioning() {
1083 if (connection.streamFeatures == null) {
1084 return false;
1085 } else {
1086 return connection.streamFeatures.hasChild("ver");
1087 }
1088 }
1089
1090 public boolean streamhost() {
1091 return connection
1092 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1093 }
1094
1095 public boolean compression() {
1096 return connection.usingCompression;
1097 }
1098 }
1099
1100 public long getLastSessionEstablished() {
1101 long diff;
1102 if (this.lastSessionStarted == 0) {
1103 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1104 } else {
1105 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1106 }
1107 return System.currentTimeMillis() - diff;
1108 }
1109
1110 public long getLastConnect() {
1111 return this.lastConnect;
1112 }
1113
1114 public long getLastPingSent() {
1115 return this.lastPingSent;
1116 }
1117
1118 public long getLastPacketReceived() {
1119 return this.lastPaketReceived;
1120 }
1121
1122 public void sendActive() {
1123 this.sendPacket(new ActivePacket(), null);
1124 }
1125
1126 public void sendInactive() {
1127 this.sendPacket(new InactivePacket(), null);
1128 }
1129}