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.IDN;
22import java.net.InetAddress;
23import java.net.InetSocketAddress;
24import java.net.Socket;
25import java.net.UnknownHostException;
26import java.security.KeyManagementException;
27import java.security.NoSuchAlgorithmException;
28import java.util.ArrayList;
29import java.util.Arrays;
30import java.util.HashMap;
31import java.util.Hashtable;
32import java.util.LinkedList;
33import java.util.List;
34import java.util.Map.Entry;
35
36import javax.net.ssl.HostnameVerifier;
37import javax.net.ssl.SSLContext;
38import javax.net.ssl.SSLSocket;
39import javax.net.ssl.SSLSocketFactory;
40import javax.net.ssl.X509TrustManager;
41
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 private static final int PACKET_IQ = 0;
69 private static final int PACKET_MESSAGE = 1;
70 private static final int PACKET_PRESENCE = 2;
71 private final Context applicationContext;
72 protected Account account;
73 private WakeLock wakeLock;
74 private Socket socket;
75 private XmlReader tagReader;
76 private TagWriter tagWriter;
77 private Features features = new Features(this);
78 private boolean shouldBind = true;
79 private boolean shouldAuthenticate = true;
80 private Element streamFeatures;
81 private HashMap<String, List<String>> disco = new HashMap<String, List<String>>();
82 private String streamId = null;
83 private int smVersion = 3;
84 private SparseArray<String> messageReceipts = new SparseArray<String>();
85 private boolean usingCompression = false;
86 private boolean usingEncryption = false;
87 private int stanzasReceived = 0;
88 private int stanzasSent = 0;
89 private long lastPaketReceived = 0;
90 private long lastPingSent = 0;
91 private long lastConnect = 0;
92 private long lastSessionStarted = 0;
93 private int attempt = 0;
94 private Hashtable<String, PacketReceived> packetCallbacks = new Hashtable<String, PacketReceived>();
95 private OnPresencePacketReceived presenceListener = null;
96 private OnJinglePacketReceived jingleListener = null;
97 private OnIqPacketReceived unregisteredIqListener = null;
98 private OnMessagePacketReceived messageListener = null;
99 private OnStatusChanged statusListener = null;
100 private OnBindListener bindListener = null;
101 private OnMessageAcknowledged acknowledgedListener = null;
102 private XmppConnectionService mXmppConnectionService = null;
103
104 public XmppConnection(Account account, XmppConnectionService service) {
105 this.account = account;
106 this.wakeLock = service.getPowerManager().newWakeLock(
107 PowerManager.PARTIAL_WAKE_LOCK, account.getJid());
108 tagWriter = new TagWriter();
109 mXmppConnectionService = service;
110 applicationContext = service.getApplicationContext();
111 }
112
113 protected void changeStatus(int nextStatus) {
114 if (account.getStatus() != nextStatus) {
115 if ((nextStatus == Account.STATUS_OFFLINE)
116 && (account.getStatus() != Account.STATUS_CONNECTING)
117 && (account.getStatus() != Account.STATUS_ONLINE)
118 && (account.getStatus() != Account.STATUS_DISABLED)) {
119 return;
120 }
121 if (nextStatus == Account.STATUS_ONLINE) {
122 this.attempt = 0;
123 }
124 account.setStatus(nextStatus);
125 if (statusListener != null) {
126 statusListener.onStatusChanged(account);
127 }
128 }
129 }
130
131 protected void connect() {
132 Log.d(Config.LOGTAG, account.getJid() + ": connecting");
133 usingCompression = false;
134 usingEncryption = false;
135 lastConnect = SystemClock.elapsedRealtime();
136 lastPingSent = SystemClock.elapsedRealtime();
137 this.attempt++;
138 try {
139 shouldAuthenticate = shouldBind = !account
140 .isOptionSet(Account.OPTION_REGISTER);
141 tagReader = new XmlReader(wakeLock);
142 tagWriter = new TagWriter();
143 packetCallbacks.clear();
144 this.changeStatus(Account.STATUS_CONNECTING);
145 Bundle result = DNSHelper.getSRVRecord(account.getServer());
146 ArrayList<Parcelable> values = result.getParcelableArrayList("values");
147 if ("timeout".equals(result.getString("error"))) {
148 Log.d(Config.LOGTAG, account.getJid() + ": dns timeout");
149 this.changeStatus(Account.STATUS_OFFLINE);
150 return;
151 } else if (values != null) {
152 int i = 0;
153 boolean socketError = true;
154 while (socketError && values.size() > i) {
155 Bundle namePort = (Bundle) values.get(i);
156 try {
157 String srvRecordServer = namePort.getString("name");
158 int srvRecordPort = namePort.getInt("port");
159 String srvIpServer = namePort.getString("ipv4");
160 InetSocketAddress addr;
161 if (srvIpServer != null) {
162 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
163 Log.d(Config.LOGTAG, account.getJid()
164 + ": using values from dns " + srvRecordServer
165 + "[" + srvIpServer + "]:" + srvRecordPort);
166 } else {
167 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
168 Log.d(Config.LOGTAG, account.getJid()
169 + ": using values from dns "
170 + srvRecordServer + ":" + srvRecordPort);
171 }
172 socket = new Socket();
173 socket.connect(addr, 20000);
174 socketError = false;
175 } catch (UnknownHostException e) {
176 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
177 i++;
178 } catch (IOException e) {
179 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
180 i++;
181 }
182 }
183 if (socketError) {
184 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
185 if (wakeLock.isHeld()) {
186 try {
187 wakeLock.release();
188 } catch (RuntimeException re) {
189 }
190 }
191 return;
192 }
193 } else if (result.containsKey("error")
194 && "nosrv".equals(result.getString("error", null))) {
195 socket = new Socket(account.getServer(), 5222);
196 } else {
197 Log.d(Config.LOGTAG, account.getJid()
198 + ": timeout in DNS resolution");
199 changeStatus(Account.STATUS_OFFLINE);
200 return;
201 }
202 OutputStream out = socket.getOutputStream();
203 tagWriter.setOutputStream(out);
204 InputStream in = socket.getInputStream();
205 tagReader.setInputStream(in);
206 tagWriter.beginDocument();
207 sendStartStream();
208 Tag nextTag;
209 while ((nextTag = tagReader.readTag()) != null) {
210 if (nextTag.isStart("stream")) {
211 processStream(nextTag);
212 break;
213 } else {
214 Log.d(Config.LOGTAG,
215 "found unexpected tag: " + nextTag.getName());
216 return;
217 }
218 }
219 if (socket.isConnected()) {
220 socket.close();
221 }
222 } catch (UnknownHostException e) {
223 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
224 if (wakeLock.isHeld()) {
225 try {
226 wakeLock.release();
227 } catch (RuntimeException re) {
228 }
229 }
230 return;
231 } catch (IOException e) {
232 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
233 this.changeStatus(Account.STATUS_OFFLINE);
234 if (wakeLock.isHeld()) {
235 try {
236 wakeLock.release();
237 } catch (RuntimeException re) {
238 }
239 }
240 return;
241 } catch (NoSuchAlgorithmException e) {
242 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
243 this.changeStatus(Account.STATUS_OFFLINE);
244 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
245 if (wakeLock.isHeld()) {
246 try {
247 wakeLock.release();
248 } catch (RuntimeException re) {
249 }
250 }
251 return;
252 } catch (XmlPullParserException e) {
253 Log.d(Config.LOGTAG, account.getJid() + ": " + e.getMessage());
254 this.changeStatus(Account.STATUS_OFFLINE);
255 if (wakeLock.isHeld()) {
256 try {
257 wakeLock.release();
258 } catch (RuntimeException re) {
259 }
260 }
261 return;
262 }
263
264 }
265
266 @Override
267 public void run() {
268 connect();
269 }
270
271 private void processStream(Tag currentTag) throws XmlPullParserException,
272 IOException, NoSuchAlgorithmException {
273 Tag nextTag = tagReader.readTag();
274 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
275 if (nextTag.isStart("error")) {
276 processStreamError(nextTag);
277 } else if (nextTag.isStart("features")) {
278 processStreamFeatures(nextTag);
279 } else if (nextTag.isStart("proceed")) {
280 switchOverToTls(nextTag);
281 } else if (nextTag.isStart("compressed")) {
282 switchOverToZLib(nextTag);
283 } else if (nextTag.isStart("success")) {
284 Log.d(Config.LOGTAG, account.getJid() + ": logged in");
285 tagReader.readTag();
286 tagReader.reset();
287 sendStartStream();
288 processStream(tagReader.readTag());
289 break;
290 } else if (nextTag.isStart("failure")) {
291 tagReader.readElement(nextTag);
292 changeStatus(Account.STATUS_UNAUTHORIZED);
293 } else if (nextTag.isStart("challenge")) {
294 String challange = tagReader.readElement(nextTag).getContent();
295 Element response = new Element("response");
296 response.setAttribute("xmlns",
297 "urn:ietf:params:xml:ns:xmpp-sasl");
298 response.setContent(CryptoHelper.saslDigestMd5(account,
299 challange, mXmppConnectionService.getRNG()));
300 tagWriter.writeElement(response);
301 } else if (nextTag.isStart("enabled")) {
302 Element enabled = tagReader.readElement(nextTag);
303 if ("true".equals(enabled.getAttribute("resume"))) {
304 this.streamId = enabled.getAttribute("id");
305 Log.d(Config.LOGTAG, account.getJid()
306 + ": stream managment(" + smVersion
307 + ") enabled (resumable)");
308 } else {
309 Log.d(Config.LOGTAG, account.getJid()
310 + ": stream managment(" + smVersion + ") enabled");
311 }
312 this.lastSessionStarted = SystemClock.elapsedRealtime();
313 this.stanzasReceived = 0;
314 RequestPacket r = new RequestPacket(smVersion);
315 tagWriter.writeStanzaAsync(r);
316 } else if (nextTag.isStart("resumed")) {
317 lastPaketReceived = SystemClock.elapsedRealtime();
318 Element resumed = tagReader.readElement(nextTag);
319 String h = resumed.getAttribute("h");
320 try {
321 int serverCount = Integer.parseInt(h);
322 if (serverCount != stanzasSent) {
323 Log.d(Config.LOGTAG, account.getJid()
324 + ": session resumed with lost packages");
325 stanzasSent = serverCount;
326 } else {
327 Log.d(Config.LOGTAG, account.getJid()
328 + ": session resumed");
329 }
330 if (acknowledgedListener != null) {
331 for (int i = 0; i < messageReceipts.size(); ++i) {
332 if (serverCount >= messageReceipts.keyAt(i)) {
333 acknowledgedListener.onMessageAcknowledged(
334 account, messageReceipts.valueAt(i));
335 }
336 }
337 }
338 messageReceipts.clear();
339 } catch (NumberFormatException e) {
340
341 }
342 sendInitialPing();
343
344 } else if (nextTag.isStart("r")) {
345 tagReader.readElement(nextTag);
346 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
347 tagWriter.writeStanzaAsync(ack);
348 } else if (nextTag.isStart("a")) {
349 Element ack = tagReader.readElement(nextTag);
350 lastPaketReceived = SystemClock.elapsedRealtime();
351 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
352 String msgId = this.messageReceipts.get(serverSequence);
353 if (msgId != null) {
354 if (this.acknowledgedListener != null) {
355 this.acknowledgedListener.onMessageAcknowledged(
356 account, msgId);
357 }
358 this.messageReceipts.remove(serverSequence);
359 }
360 } else if (nextTag.isStart("failed")) {
361 tagReader.readElement(nextTag);
362 Log.d(Config.LOGTAG, account.getJid() + ": resumption failed");
363 streamId = null;
364 if (account.getStatus() != Account.STATUS_ONLINE) {
365 sendBindRequest();
366 }
367 } else if (nextTag.isStart("iq")) {
368 processIq(nextTag);
369 } else if (nextTag.isStart("message")) {
370 processMessage(nextTag);
371 } else if (nextTag.isStart("presence")) {
372 processPresence(nextTag);
373 }
374 nextTag = tagReader.readTag();
375 }
376 if (account.getStatus() == Account.STATUS_ONLINE) {
377 account.setStatus(Account.STATUS_OFFLINE);
378 if (statusListener != null) {
379 statusListener.onStatusChanged(account);
380 }
381 }
382 }
383
384 private void sendInitialPing() {
385 Log.d(Config.LOGTAG, account.getJid() + ": sending intial ping");
386 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
387 iq.setFrom(account.getFullJid());
388 iq.addChild("ping", "urn:xmpp:ping");
389 this.sendIqPacket(iq, new OnIqPacketReceived() {
390
391 @Override
392 public void onIqPacketReceived(Account account, IqPacket packet) {
393 Log.d(Config.LOGTAG, account.getJid()
394 + ": online with resource " + account.getResource());
395 changeStatus(Account.STATUS_ONLINE);
396 }
397 });
398 }
399
400 private Element processPacket(Tag currentTag, int packetType)
401 throws XmlPullParserException, IOException {
402 Element element;
403 switch (packetType) {
404 case PACKET_IQ:
405 element = new IqPacket();
406 break;
407 case PACKET_MESSAGE:
408 element = new MessagePacket();
409 break;
410 case PACKET_PRESENCE:
411 element = new PresencePacket();
412 break;
413 default:
414 return null;
415 }
416 element.setAttributes(currentTag.getAttributes());
417 Tag nextTag = tagReader.readTag();
418 if (nextTag == null) {
419 throw new IOException("interrupted mid tag");
420 }
421 while (!nextTag.isEnd(element.getName())) {
422 if (!nextTag.isNo()) {
423 Element child = tagReader.readElement(nextTag);
424 String type = currentTag.getAttribute("type");
425 if (packetType == PACKET_IQ
426 && "jingle".equals(child.getName())
427 && ("set".equalsIgnoreCase(type) || "get"
428 .equalsIgnoreCase(type))) {
429 element = new JinglePacket();
430 element.setAttributes(currentTag.getAttributes());
431 }
432 element.addChild(child);
433 }
434 nextTag = tagReader.readTag();
435 if (nextTag == null) {
436 throw new IOException("interrupted mid tag");
437 }
438 }
439 ++stanzasReceived;
440 lastPaketReceived = SystemClock.elapsedRealtime();
441 return element;
442 }
443
444 private void processIq(Tag currentTag) throws XmlPullParserException,
445 IOException {
446 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
447
448 if (packet.getId() == null) {
449 return; // an iq packet without id is definitely invalid
450 }
451
452 if (packet instanceof JinglePacket) {
453 if (this.jingleListener != null) {
454 this.jingleListener.onJinglePacketReceived(account,
455 (JinglePacket) packet);
456 }
457 } else {
458 if (packetCallbacks.containsKey(packet.getId())) {
459 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
460 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
461 .onIqPacketReceived(account, packet);
462 }
463
464 packetCallbacks.remove(packet.getId());
465 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
466 .getType() == IqPacket.TYPE_SET)
467 && this.unregisteredIqListener != null) {
468 this.unregisteredIqListener.onIqPacketReceived(account, packet);
469 }
470 }
471 }
472
473 private void processMessage(Tag currentTag) throws XmlPullParserException,
474 IOException {
475 MessagePacket packet = (MessagePacket) processPacket(currentTag,
476 PACKET_MESSAGE);
477 String id = packet.getAttribute("id");
478 if ((id != null) && (packetCallbacks.containsKey(id))) {
479 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
480 ((OnMessagePacketReceived) packetCallbacks.get(id))
481 .onMessagePacketReceived(account, packet);
482 }
483 packetCallbacks.remove(id);
484 } else if (this.messageListener != null) {
485 this.messageListener.onMessagePacketReceived(account, packet);
486 }
487 }
488
489 private void processPresence(Tag currentTag) throws XmlPullParserException,
490 IOException {
491 PresencePacket packet = (PresencePacket) processPacket(currentTag,
492 PACKET_PRESENCE);
493 String id = packet.getAttribute("id");
494 if ((id != null) && (packetCallbacks.containsKey(id))) {
495 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
496 ((OnPresencePacketReceived) packetCallbacks.get(id))
497 .onPresencePacketReceived(account, packet);
498 }
499 packetCallbacks.remove(id);
500 } else if (this.presenceListener != null) {
501 this.presenceListener.onPresencePacketReceived(account, packet);
502 }
503 }
504
505 private void sendCompressionZlib() throws IOException {
506 Element compress = new Element("compress");
507 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
508 compress.addChild("method").setContent("zlib");
509 tagWriter.writeElement(compress);
510 }
511
512 private void switchOverToZLib(Tag currentTag)
513 throws XmlPullParserException, IOException,
514 NoSuchAlgorithmException {
515 tagReader.readTag(); // read tag close
516 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
517 .getOutputStream()));
518 tagReader
519 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
520
521 sendStartStream();
522 Log.d(Config.LOGTAG, account.getJid() + ": compression enabled");
523 usingCompression = true;
524 processStream(tagReader.readTag());
525 }
526
527 private void sendStartTLS() throws IOException {
528 Tag startTLS = Tag.empty("starttls");
529 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
530 tagWriter.writeTag(startTLS);
531 }
532
533 private SharedPreferences getPreferences() {
534 return PreferenceManager
535 .getDefaultSharedPreferences(applicationContext);
536 }
537
538 private boolean enableLegacySSL() {
539 return getPreferences().getBoolean("enable_legacy_ssl", false);
540 }
541
542 private void switchOverToTls(Tag currentTag) throws XmlPullParserException,
543 IOException {
544 tagReader.readTag();
545 try {
546 SSLContext sc = SSLContext.getInstance("TLS");
547 sc.init(null,
548 new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},
549 mXmppConnectionService.getRNG());
550 SSLSocketFactory factory = sc.getSocketFactory();
551
552 if (factory == null) {
553 throw new IOException("SSLSocketFactory was null");
554 }
555
556 HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
557
558 if (socket == null || socket.isClosed()) {
559 throw new IOException("socket null or closed");
560 }
561 final InetAddress address = socket.getInetAddress();
562 if (address == null) {
563 throw new IOException("socket address was null");
564 }
565
566 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
567
568 // Support all protocols except legacy SSL.
569 // The min SDK version prevents us having to worry about SSLv2. In
570 // future, this may be
571 // true of SSLv3 as well.
572 final String[] supportProtocols;
573 if (enableLegacySSL()) {
574 supportProtocols = sslSocket.getSupportedProtocols();
575 } else {
576 final List<String> supportedProtocols = new LinkedList<String>(
577 Arrays.asList(sslSocket.getSupportedProtocols()));
578 supportedProtocols.remove("SSLv3");
579 supportProtocols = new String[supportedProtocols.size()];
580 supportedProtocols.toArray(supportProtocols);
581 }
582 sslSocket.setEnabledProtocols(supportProtocols);
583
584 if (verifier != null
585 && !verifier.verify(account.getServer(),
586 sslSocket.getSession())) {
587 sslSocket.close();
588 throw new IOException("host mismatch in TLS connection");
589 }
590 tagReader.setInputStream(sslSocket.getInputStream());
591 tagWriter.setOutputStream(sslSocket.getOutputStream());
592 sendStartStream();
593 Log.d(Config.LOGTAG, account.getJid()
594 + ": TLS connection established");
595 usingEncryption = true;
596 processStream(tagReader.readTag());
597 sslSocket.close();
598 } catch (NoSuchAlgorithmException e1) {
599 e1.printStackTrace();
600 } catch (KeyManagementException e) {
601 e.printStackTrace();
602 }
603 }
604
605 private void sendSaslAuthPlain() throws IOException {
606 String saslString = CryptoHelper.saslPlain(account.getUsername(),
607 account.getPassword());
608 Element auth = new Element("auth");
609 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
610 auth.setAttribute("mechanism", "PLAIN");
611 auth.setContent(saslString);
612 tagWriter.writeElement(auth);
613 }
614
615 private void sendSaslAuthDigestMd5() throws IOException {
616 Element auth = new Element("auth");
617 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
618 auth.setAttribute("mechanism", "DIGEST-MD5");
619 tagWriter.writeElement(auth);
620 }
621
622 private void processStreamFeatures(Tag currentTag)
623 throws XmlPullParserException, IOException {
624 this.streamFeatures = tagReader.readElement(currentTag);
625 if (this.streamFeatures.hasChild("starttls") && !usingEncryption) {
626 sendStartTLS();
627 } else if (compressionAvailable()) {
628 sendCompressionZlib();
629 } else if (this.streamFeatures.hasChild("register")
630 && account.isOptionSet(Account.OPTION_REGISTER)
631 && usingEncryption) {
632 sendRegistryRequest();
633 } else if (!this.streamFeatures.hasChild("register")
634 && account.isOptionSet(Account.OPTION_REGISTER)) {
635 changeStatus(Account.STATUS_REGISTRATION_NOT_SUPPORTED);
636 disconnect(true);
637 } else if (this.streamFeatures.hasChild("mechanisms")
638 && shouldAuthenticate && usingEncryption) {
639 List<String> mechanisms = extractMechanisms(streamFeatures
640 .findChild("mechanisms"));
641 if (mechanisms.contains("PLAIN")) {
642 sendSaslAuthPlain();
643 } else if (mechanisms.contains("DIGEST-MD5")) {
644 sendSaslAuthDigestMd5();
645 }
646 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
647 + smVersion)
648 && streamId != null) {
649 ResumePacket resume = new ResumePacket(this.streamId,
650 stanzasReceived, smVersion);
651 this.tagWriter.writeStanzaAsync(resume);
652 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
653 sendBindRequest();
654 } else {
655 Log.d(Config.LOGTAG, account.getJid()
656 + ": incompatible server. disconnecting");
657 disconnect(true);
658 }
659 }
660
661 private boolean compressionAvailable() {
662 if (!this.streamFeatures.hasChild("compression",
663 "http://jabber.org/features/compress"))
664 return false;
665 if (!ZLibOutputStream.SUPPORTED)
666 return false;
667 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
668 return false;
669
670 Element compression = this.streamFeatures.findChild("compression",
671 "http://jabber.org/features/compress");
672 for (Element child : compression.getChildren()) {
673 if (!"method".equals(child.getName()))
674 continue;
675
676 if ("zlib".equalsIgnoreCase(child.getContent())) {
677 return true;
678 }
679 }
680 return false;
681 }
682
683 private List<String> extractMechanisms(Element stream) {
684 ArrayList<String> mechanisms = new ArrayList<String>(stream
685 .getChildren().size());
686 for (Element child : stream.getChildren()) {
687 mechanisms.add(child.getContent());
688 }
689 return mechanisms;
690 }
691
692 private void sendRegistryRequest() {
693 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
694 register.query("jabber:iq:register");
695 register.setTo(account.getServer());
696 sendIqPacket(register, new OnIqPacketReceived() {
697
698 @Override
699 public void onIqPacketReceived(Account account, IqPacket packet) {
700 Element instructions = packet.query().findChild("instructions");
701 if (packet.query().hasChild("username")
702 && (packet.query().hasChild("password"))) {
703 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
704 Element username = new Element("username")
705 .setContent(account.getUsername());
706 Element password = new Element("password")
707 .setContent(account.getPassword());
708 register.query("jabber:iq:register").addChild(username);
709 register.query().addChild(password);
710 sendIqPacket(register, new OnIqPacketReceived() {
711
712 @Override
713 public void onIqPacketReceived(Account account,
714 IqPacket packet) {
715 if (packet.getType() == IqPacket.TYPE_RESULT) {
716 account.setOption(Account.OPTION_REGISTER,
717 false);
718 changeStatus(Account.STATUS_REGISTRATION_SUCCESSFULL);
719 } else if (packet.hasChild("error")
720 && (packet.findChild("error")
721 .hasChild("conflict"))) {
722 changeStatus(Account.STATUS_REGISTRATION_CONFLICT);
723 } else {
724 changeStatus(Account.STATUS_REGISTRATION_FAILED);
725 Log.d(Config.LOGTAG, packet.toString());
726 }
727 disconnect(true);
728 }
729 });
730 } else {
731 changeStatus(Account.STATUS_REGISTRATION_FAILED);
732 disconnect(true);
733 Log.d(Config.LOGTAG, account.getJid()
734 + ": could not register. instructions are"
735 + instructions.getContent());
736 }
737 }
738 });
739 }
740
741 private void sendBindRequest() throws IOException {
742 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
743 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
744 .addChild("resource").setContent(account.getResource());
745 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
746 @Override
747 public void onIqPacketReceived(Account account, IqPacket packet) {
748 Element bind = packet.findChild("bind");
749 if (bind != null) {
750 Element jid = bind.findChild("jid");
751 if (jid != null && jid.getContent() != null) {
752 account.setResource(jid.getContent().split("/", 2)[1]);
753 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
754 smVersion = 3;
755 EnablePacket enable = new EnablePacket(smVersion);
756 tagWriter.writeStanzaAsync(enable);
757 stanzasSent = 0;
758 messageReceipts.clear();
759 } else if (streamFeatures.hasChild("sm",
760 "urn:xmpp:sm:2")) {
761 smVersion = 2;
762 EnablePacket enable = new EnablePacket(smVersion);
763 tagWriter.writeStanzaAsync(enable);
764 stanzasSent = 0;
765 messageReceipts.clear();
766 }
767 sendServiceDiscoveryInfo(account.getServer());
768 sendServiceDiscoveryItems(account.getServer());
769 if (bindListener != null) {
770 bindListener.onBind(account);
771 }
772 sendInitialPing();
773 } else {
774 disconnect(true);
775 }
776 } else {
777 disconnect(true);
778 }
779 }
780 });
781 if (this.streamFeatures.hasChild("session")) {
782 Log.d(Config.LOGTAG, account.getJid()
783 + ": sending deprecated session");
784 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
785 startSession.addChild("session",
786 "urn:ietf:params:xml:ns:xmpp-session");
787 this.sendUnboundIqPacket(startSession, null);
788 }
789 }
790
791 private void sendServiceDiscoveryInfo(final String server) {
792 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
793 iq.setTo(server);
794 iq.query("http://jabber.org/protocol/disco#info");
795 this.sendIqPacket(iq, new OnIqPacketReceived() {
796
797 @Override
798 public void onIqPacketReceived(Account account, IqPacket packet) {
799 List<Element> elements = packet.query().getChildren();
800 List<String> features = new ArrayList<String>();
801 for (int i = 0; i < elements.size(); ++i) {
802 if (elements.get(i).getName().equals("feature")) {
803 features.add(elements.get(i).getAttribute("var"));
804 }
805 }
806 disco.put(server, features);
807
808 if (account.getServer().equals(server)) {
809 enableAdvancedStreamFeatures();
810 }
811 }
812 });
813 }
814
815 private void enableAdvancedStreamFeatures() {
816 if (getFeatures().carbons()) {
817 sendEnableCarbons();
818 }
819 }
820
821 private void sendServiceDiscoveryItems(final String server) {
822 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
823 iq.setTo(server);
824 iq.query("http://jabber.org/protocol/disco#items");
825 this.sendIqPacket(iq, new OnIqPacketReceived() {
826
827 @Override
828 public void onIqPacketReceived(Account account, IqPacket packet) {
829 List<Element> elements = packet.query().getChildren();
830 for (int i = 0; i < elements.size(); ++i) {
831 if (elements.get(i).getName().equals("item")) {
832 String jid = elements.get(i).getAttribute("jid");
833 sendServiceDiscoveryInfo(jid);
834 }
835 }
836 }
837 });
838 }
839
840 private void sendEnableCarbons() {
841 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
842 iq.addChild("enable", "urn:xmpp:carbons:2");
843 this.sendIqPacket(iq, new OnIqPacketReceived() {
844
845 @Override
846 public void onIqPacketReceived(Account account, IqPacket packet) {
847 if (!packet.hasChild("error")) {
848 Log.d(Config.LOGTAG, account.getJid()
849 + ": successfully enabled carbons");
850 } else {
851 Log.d(Config.LOGTAG, account.getJid()
852 + ": error enableing carbons " + packet.toString());
853 }
854 }
855 });
856 }
857
858 private void processStreamError(Tag currentTag)
859 throws XmlPullParserException, IOException {
860 Element streamError = tagReader.readElement(currentTag);
861 if (streamError != null && streamError.hasChild("conflict")) {
862 String resource = account.getResource().split("\\.")[0];
863 account.setResource(resource + "." + nextRandomId());
864 Log.d(Config.LOGTAG,
865 account.getJid() + ": switching resource due to conflict ("
866 + account.getResource() + ")");
867 }
868 }
869
870 private void sendStartStream() throws IOException {
871 Tag stream = Tag.start("stream:stream");
872 stream.setAttribute("from", account.getJid());
873 stream.setAttribute("to", account.getServer());
874 stream.setAttribute("version", "1.0");
875 stream.setAttribute("xml:lang", "en");
876 stream.setAttribute("xmlns", "jabber:client");
877 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
878 tagWriter.writeTag(stream);
879 }
880
881 private String nextRandomId() {
882 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
883 }
884
885 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
886 if (packet.getId() == null) {
887 String id = nextRandomId();
888 packet.setAttribute("id", id);
889 }
890 packet.setFrom(account.getFullJid());
891 this.sendPacket(packet, callback);
892 }
893
894 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
895 if (packet.getId() == null) {
896 String id = nextRandomId();
897 packet.setAttribute("id", id);
898 }
899 this.sendPacket(packet, callback);
900 }
901
902 public void sendMessagePacket(MessagePacket packet) {
903 this.sendPacket(packet, null);
904 }
905
906 public void sendPresencePacket(PresencePacket packet) {
907 this.sendPacket(packet, null);
908 }
909
910 private synchronized void sendPacket(final AbstractStanza packet,
911 PacketReceived callback) {
912 if (packet.getName().equals("iq") || packet.getName().equals("message")
913 || packet.getName().equals("presence")) {
914 ++stanzasSent;
915 }
916 tagWriter.writeStanzaAsync(packet);
917 if (packet instanceof MessagePacket && packet.getId() != null
918 && this.streamId != null) {
919 Log.d(Config.LOGTAG, "request delivery report for stanza "
920 + stanzasSent);
921 this.messageReceipts.put(stanzasSent, packet.getId());
922 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
923 }
924 if (callback != null) {
925 if (packet.getId() == null) {
926 packet.setId(nextRandomId());
927 }
928 packetCallbacks.put(packet.getId(), callback);
929 }
930 }
931
932 public void sendPing() {
933 if (streamFeatures.hasChild("sm")) {
934 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
935 } else {
936 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
937 iq.setFrom(account.getFullJid());
938 iq.addChild("ping", "urn:xmpp:ping");
939 this.sendIqPacket(iq, null);
940 }
941 this.lastPingSent = SystemClock.elapsedRealtime();
942 }
943
944 public void setOnMessagePacketReceivedListener(
945 OnMessagePacketReceived listener) {
946 this.messageListener = listener;
947 }
948
949 public void setOnUnregisteredIqPacketReceivedListener(
950 OnIqPacketReceived listener) {
951 this.unregisteredIqListener = listener;
952 }
953
954 public void setOnPresencePacketReceivedListener(
955 OnPresencePacketReceived listener) {
956 this.presenceListener = listener;
957 }
958
959 public void setOnJinglePacketReceivedListener(
960 OnJinglePacketReceived listener) {
961 this.jingleListener = listener;
962 }
963
964 public void setOnStatusChangedListener(OnStatusChanged listener) {
965 this.statusListener = listener;
966 }
967
968 public void setOnBindListener(OnBindListener listener) {
969 this.bindListener = listener;
970 }
971
972 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
973 this.acknowledgedListener = listener;
974 }
975
976 public void disconnect(boolean force) {
977 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting");
978 try {
979 if (force) {
980 socket.close();
981 return;
982 }
983 new Thread(new Runnable() {
984
985 @Override
986 public void run() {
987 if (tagWriter.isActive()) {
988 tagWriter.finish();
989 try {
990 while (!tagWriter.finished()) {
991 Log.d(Config.LOGTAG, "not yet finished");
992 Thread.sleep(100);
993 }
994 tagWriter.writeTag(Tag.end("stream:stream"));
995 socket.close();
996 } catch (IOException e) {
997 Log.d(Config.LOGTAG,
998 "io exception during disconnect");
999 } catch (InterruptedException e) {
1000 Log.d(Config.LOGTAG, "interrupted");
1001 }
1002 }
1003 }
1004 }).start();
1005 } catch (IOException e) {
1006 Log.d(Config.LOGTAG, "io exception during disconnect");
1007 }
1008 }
1009
1010 public List<String> findDiscoItemsByFeature(String feature) {
1011 List<String> items = new ArrayList<String>();
1012 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1013 if (cursor.getValue().contains(feature)) {
1014 items.add(cursor.getKey());
1015 }
1016 }
1017 return items;
1018 }
1019
1020 public String findDiscoItemByFeature(String feature) {
1021 List<String> items = findDiscoItemsByFeature(feature);
1022 if (items.size() >= 1) {
1023 return items.get(0);
1024 }
1025 return null;
1026 }
1027
1028 public void r() {
1029 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1030 }
1031
1032 public String getMucServer() {
1033 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1034 }
1035
1036 public int getTimeToNextAttempt() {
1037 int interval = (int) (25 * Math.pow(1.5, attempt));
1038 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1039 return interval - secondsSinceLast;
1040 }
1041
1042 public int getAttempt() {
1043 return this.attempt;
1044 }
1045
1046 public Features getFeatures() {
1047 return this.features;
1048 }
1049
1050 public long getLastSessionEstablished() {
1051 long diff;
1052 if (this.lastSessionStarted == 0) {
1053 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1054 } else {
1055 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1056 }
1057 return System.currentTimeMillis() - diff;
1058 }
1059
1060 public long getLastConnect() {
1061 return this.lastConnect;
1062 }
1063
1064 public long getLastPingSent() {
1065 return this.lastPingSent;
1066 }
1067
1068 public long getLastPacketReceived() {
1069 return this.lastPaketReceived;
1070 }
1071
1072 public void sendActive() {
1073 this.sendPacket(new ActivePacket(), null);
1074 }
1075
1076 public void sendInactive() {
1077 this.sendPacket(new InactivePacket(), null);
1078 }
1079
1080 public class Features {
1081 XmppConnection connection;
1082
1083 public Features(XmppConnection connection) {
1084 this.connection = connection;
1085 }
1086
1087 private boolean hasDiscoFeature(String server, String feature) {
1088 if (!connection.disco.containsKey(server)) {
1089 return false;
1090 }
1091 return connection.disco.get(server).contains(feature);
1092 }
1093
1094 public boolean carbons() {
1095 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1096 }
1097
1098 public boolean sm() {
1099 return streamId != null;
1100 }
1101
1102 public boolean csi() {
1103 if (connection.streamFeatures == null) {
1104 return false;
1105 } else {
1106 return connection.streamFeatures.hasChild("csi",
1107 "urn:xmpp:csi:0");
1108 }
1109 }
1110
1111 public boolean pubsub() {
1112 return hasDiscoFeature(account.getServer(),
1113 "http://jabber.org/protocol/pubsub#publish");
1114 }
1115
1116 public boolean mam() {
1117 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1118 }
1119
1120 public boolean rosterVersioning() {
1121 if (connection.streamFeatures == null) {
1122 return false;
1123 } else {
1124 return connection.streamFeatures.hasChild("ver");
1125 }
1126 }
1127
1128 public boolean streamhost() {
1129 return connection
1130 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1131 }
1132
1133 public boolean compression() {
1134 return connection.usingCompression;
1135 }
1136 }
1137}