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.InetSocketAddress;
23import java.net.Socket;
24import java.net.UnknownHostException;
25import java.security.KeyManagementException;
26import java.security.NoSuchAlgorithmException;
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 eu.siacs.conversations.Config;
42import eu.siacs.conversations.crypto.sasl.DigestMd5;
43import eu.siacs.conversations.crypto.sasl.Plain;
44import eu.siacs.conversations.crypto.sasl.SaslMechanism;
45import eu.siacs.conversations.entities.Account;
46import eu.siacs.conversations.services.XmppConnectionService;
47import eu.siacs.conversations.utils.DNSHelper;
48import eu.siacs.conversations.utils.zlib.ZLibInputStream;
49import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
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.jid.InvalidJidException;
55import eu.siacs.conversations.xmpp.jid.Jid;
56import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
57import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
58import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
59import eu.siacs.conversations.xmpp.stanzas.IqPacket;
60import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
61import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
62import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
63import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
64import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
65import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
66import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
67import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
68
69public class XmppConnection implements Runnable {
70
71 private static final int PACKET_IQ = 0;
72 private static final int PACKET_MESSAGE = 1;
73 private static final int PACKET_PRESENCE = 2;
74 private final Context applicationContext;
75 protected Account account;
76 private WakeLock wakeLock;
77 private Socket socket;
78 private XmlReader tagReader;
79 private TagWriter tagWriter;
80 private Features features = new Features(this);
81 private boolean shouldBind = true;
82 private boolean shouldAuthenticate = true;
83 private Element streamFeatures;
84 private HashMap<String, List<String>> disco = new HashMap<>();
85
86 private String streamId = null;
87 private int smVersion = 3;
88 private SparseArray<String> messageReceipts = new SparseArray<>();
89
90 private boolean usingCompression = false;
91 private boolean usingEncryption = false;
92 private int stanzasReceived = 0;
93 private int stanzasSent = 0;
94 private long lastPaketReceived = 0;
95 private long lastPingSent = 0;
96 private long lastConnect = 0;
97 private long lastSessionStarted = 0;
98 private int attempt = 0;
99 private Hashtable<String, PacketReceived> packetCallbacks = new Hashtable<>();
100 private OnPresencePacketReceived presenceListener = null;
101 private OnJinglePacketReceived jingleListener = null;
102 private OnIqPacketReceived unregisteredIqListener = null;
103 private OnMessagePacketReceived messageListener = null;
104 private OnStatusChanged statusListener = null;
105 private OnBindListener bindListener = null;
106 private OnMessageAcknowledged acknowledgedListener = null;
107 private XmppConnectionService mXmppConnectionService = null;
108
109 private SaslMechanism saslMechanism;
110
111 public XmppConnection(Account account, XmppConnectionService service) {
112 this.account = account;
113 this.wakeLock = service.getPowerManager().newWakeLock(
114 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
115 tagWriter = new TagWriter();
116 mXmppConnectionService = service;
117 applicationContext = service.getApplicationContext();
118 }
119
120 protected void changeStatus(int nextStatus) {
121 if (account.getStatus() != nextStatus) {
122 if ((nextStatus == Account.STATUS_OFFLINE)
123 && (account.getStatus() != Account.STATUS_CONNECTING)
124 && (account.getStatus() != Account.STATUS_ONLINE)
125 && (account.getStatus() != Account.STATUS_DISABLED)) {
126 return;
127 }
128 if (nextStatus == Account.STATUS_ONLINE) {
129 this.attempt = 0;
130 }
131 account.setStatus(nextStatus);
132 if (statusListener != null) {
133 statusListener.onStatusChanged(account);
134 }
135 }
136 }
137
138 protected void connect() {
139 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
140 usingCompression = false;
141 usingEncryption = false;
142 lastConnect = SystemClock.elapsedRealtime();
143 lastPingSent = SystemClock.elapsedRealtime();
144 this.attempt++;
145 try {
146 shouldAuthenticate = shouldBind = !account
147 .isOptionSet(Account.OPTION_REGISTER);
148 tagReader = new XmlReader(wakeLock);
149 tagWriter = new TagWriter();
150 packetCallbacks.clear();
151 this.changeStatus(Account.STATUS_CONNECTING);
152 Bundle result = DNSHelper.getSRVRecord(account.getServer());
153 ArrayList<Parcelable> values = result.getParcelableArrayList("values");
154 if ("timeout".equals(result.getString("error"))) {
155 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": dns timeout");
156 this.changeStatus(Account.STATUS_OFFLINE);
157 return;
158 } else if (values != null) {
159 int i = 0;
160 boolean socketError = true;
161 while (socketError && values.size() > i) {
162 Bundle namePort = (Bundle) values.get(i);
163 try {
164 String srvRecordServer;
165 try {
166 srvRecordServer=IDN.toASCII(namePort.getString("name"));
167 } catch (final IllegalArgumentException e) {
168 // TODO: Handle me?`
169 srvRecordServer = "";
170 }
171 int srvRecordPort = namePort.getInt("port");
172 String srvIpServer = namePort.getString("ipv4");
173 InetSocketAddress addr;
174 if (srvIpServer != null) {
175 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
176 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
177 + ": using values from dns " + srvRecordServer
178 + "[" + srvIpServer + "]:" + srvRecordPort);
179 } else {
180 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
181 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
182 + ": using values from dns "
183 + srvRecordServer + ":" + srvRecordPort);
184 }
185 socket = new Socket();
186 socket.connect(addr, 20000);
187 socketError = false;
188 } catch (UnknownHostException e) {
189 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
190 i++;
191 } catch (IOException e) {
192 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
193 i++;
194 }
195 }
196 if (socketError) {
197 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
198 if (wakeLock.isHeld()) {
199 try {
200 wakeLock.release();
201 } catch (final RuntimeException ignored) {
202 }
203 }
204 return;
205 }
206 } else if (result.containsKey("error")
207 && "nosrv".equals(result.getString("error", null))) {
208 socket = new Socket(account.getServer().getDomainpart(), 5222);
209 } else {
210 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
211 + ": timeout in DNS resolution");
212 changeStatus(Account.STATUS_OFFLINE);
213 return;
214 }
215 OutputStream out = socket.getOutputStream();
216 tagWriter.setOutputStream(out);
217 InputStream in = socket.getInputStream();
218 tagReader.setInputStream(in);
219 tagWriter.beginDocument();
220 sendStartStream();
221 Tag nextTag;
222 while ((nextTag = tagReader.readTag()) != null) {
223 if (nextTag.isStart("stream")) {
224 processStream(nextTag);
225 break;
226 } else {
227 Log.d(Config.LOGTAG,
228 "found unexpected tag: " + nextTag.getName());
229 return;
230 }
231 }
232 if (socket.isConnected()) {
233 socket.close();
234 }
235 } catch (UnknownHostException e) {
236 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
237 if (wakeLock.isHeld()) {
238 try {
239 wakeLock.release();
240 } catch (final RuntimeException ignored) {
241 }
242 }
243 } catch (final IOException | XmlPullParserException e) {
244 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
245 this.changeStatus(Account.STATUS_OFFLINE);
246 if (wakeLock.isHeld()) {
247 try {
248 wakeLock.release();
249 } catch (final RuntimeException ignored) {
250 }
251 }
252 } catch (NoSuchAlgorithmException e) {
253 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
254 this.changeStatus(Account.STATUS_OFFLINE);
255 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
256 if (wakeLock.isHeld()) {
257 try {
258 wakeLock.release();
259 } catch (final RuntimeException ignored) {
260 }
261 }
262 }
263
264 }
265
266 @Override
267 public void run() {
268 connect();
269 }
270
271 private void processStream(final 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().toBareJid().toString() + ": 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 final String challenge = tagReader.readElement(nextTag).getContent();
295 final Element response = new Element("response");
296 response.setAttribute("xmlns",
297 "urn:ietf:params:xml:ns:xmpp-sasl");
298 response.setContent(saslMechanism.getResponse(challenge));
299 tagWriter.writeElement(response);
300 } else if (nextTag.isStart("enabled")) {
301 Element enabled = tagReader.readElement(nextTag);
302 if ("true".equals(enabled.getAttribute("resume"))) {
303 this.streamId = enabled.getAttribute("id");
304 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
305 + ": stream managment(" + smVersion
306 + ") enabled (resumable)");
307 } else {
308 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
309 + ": stream managment(" + smVersion + ") enabled");
310 }
311 this.lastSessionStarted = SystemClock.elapsedRealtime();
312 this.stanzasReceived = 0;
313 RequestPacket r = new RequestPacket(smVersion);
314 tagWriter.writeStanzaAsync(r);
315 } else if (nextTag.isStart("resumed")) {
316 lastPaketReceived = SystemClock.elapsedRealtime();
317 Element resumed = tagReader.readElement(nextTag);
318 String h = resumed.getAttribute("h");
319 try {
320 int serverCount = Integer.parseInt(h);
321 if (serverCount != stanzasSent) {
322 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
323 + ": session resumed with lost packages");
324 stanzasSent = serverCount;
325 } else {
326 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
327 + ": session resumed");
328 }
329 if (acknowledgedListener != null) {
330 for (int i = 0; i < messageReceipts.size(); ++i) {
331 if (serverCount >= messageReceipts.keyAt(i)) {
332 acknowledgedListener.onMessageAcknowledged(
333 account, messageReceipts.valueAt(i));
334 }
335 }
336 }
337 messageReceipts.clear();
338 } catch (final NumberFormatException ignored) {
339
340 }
341 sendInitialPing();
342
343 } else if (nextTag.isStart("r")) {
344 tagReader.readElement(nextTag);
345 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
346 tagWriter.writeStanzaAsync(ack);
347 } else if (nextTag.isStart("a")) {
348 Element ack = tagReader.readElement(nextTag);
349 lastPaketReceived = SystemClock.elapsedRealtime();
350 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
351 String msgId = this.messageReceipts.get(serverSequence);
352 if (msgId != null) {
353 if (this.acknowledgedListener != null) {
354 this.acknowledgedListener.onMessageAcknowledged(
355 account, msgId);
356 }
357 this.messageReceipts.remove(serverSequence);
358 }
359 } else if (nextTag.isStart("failed")) {
360 tagReader.readElement(nextTag);
361 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
362 streamId = null;
363 if (account.getStatus() != Account.STATUS_ONLINE) {
364 sendBindRequest();
365 }
366 } else if (nextTag.isStart("iq")) {
367 processIq(nextTag);
368 } else if (nextTag.isStart("message")) {
369 processMessage(nextTag);
370 } else if (nextTag.isStart("presence")) {
371 processPresence(nextTag);
372 }
373 nextTag = tagReader.readTag();
374 }
375 if (account.getStatus() == Account.STATUS_ONLINE) {
376 account. setStatus(Account.STATUS_OFFLINE);
377 if (statusListener != null) {
378 statusListener.onStatusChanged(account);
379 }
380 }
381 }
382
383 private void sendInitialPing() {
384 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
385 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
386 iq.setFrom(account.getJid());
387 iq.addChild("ping", "urn:xmpp:ping");
388 this.sendIqPacket(iq, new OnIqPacketReceived() {
389
390 @Override
391 public void onIqPacketReceived(Account account, IqPacket packet) {
392 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
393 + ": online with resource " + account.getResource());
394 changeStatus(Account.STATUS_ONLINE);
395 }
396 });
397 }
398
399 private Element processPacket(Tag currentTag, int packetType)
400 throws XmlPullParserException, IOException {
401 Element element;
402 switch (packetType) {
403 case PACKET_IQ:
404 element = new IqPacket();
405 break;
406 case PACKET_MESSAGE:
407 element = new MessagePacket();
408 break;
409 case PACKET_PRESENCE:
410 element = new PresencePacket();
411 break;
412 default:
413 return null;
414 }
415 element.setAttributes(currentTag.getAttributes());
416 Tag nextTag = tagReader.readTag();
417 if (nextTag == null) {
418 throw new IOException("interrupted mid tag");
419 }
420 while (!nextTag.isEnd(element.getName())) {
421 if (!nextTag.isNo()) {
422 Element child = tagReader.readElement(nextTag);
423 String type = currentTag.getAttribute("type");
424 if (packetType == PACKET_IQ
425 && "jingle".equals(child.getName())
426 && ("set".equalsIgnoreCase(type) || "get"
427 .equalsIgnoreCase(type))) {
428 element = new JinglePacket();
429 element.setAttributes(currentTag.getAttributes());
430 }
431 element.addChild(child);
432 }
433 nextTag = tagReader.readTag();
434 if (nextTag == null) {
435 throw new IOException("interrupted mid tag");
436 }
437 }
438 ++stanzasReceived;
439 lastPaketReceived = SystemClock.elapsedRealtime();
440 return element;
441 }
442
443 private void processIq(Tag currentTag) throws XmlPullParserException,
444 IOException {
445 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
446
447 if (packet.getId() == null) {
448 return; // an iq packet without id is definitely invalid
449 }
450
451 if (packet instanceof JinglePacket) {
452 if (this.jingleListener != null) {
453 this.jingleListener.onJinglePacketReceived(account,
454 (JinglePacket) packet);
455 }
456 } else {
457 if (packetCallbacks.containsKey(packet.getId())) {
458 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
459 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
460 .onIqPacketReceived(account, packet);
461 }
462
463 packetCallbacks.remove(packet.getId());
464 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
465 .getType() == IqPacket.TYPE_SET)
466 && this.unregisteredIqListener != null) {
467 this.unregisteredIqListener.onIqPacketReceived(account, packet);
468 }
469 }
470 }
471
472 private void processMessage(Tag currentTag) throws XmlPullParserException,
473 IOException {
474 MessagePacket packet = (MessagePacket) processPacket(currentTag,
475 PACKET_MESSAGE);
476 String id = packet.getAttribute("id");
477 if ((id != null) && (packetCallbacks.containsKey(id))) {
478 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
479 ((OnMessagePacketReceived) packetCallbacks.get(id))
480 .onMessagePacketReceived(account, packet);
481 }
482 packetCallbacks.remove(id);
483 } else if (this.messageListener != null) {
484 this.messageListener.onMessagePacketReceived(account, packet);
485 }
486 }
487
488 private void processPresence(Tag currentTag) throws XmlPullParserException,
489 IOException {
490 PresencePacket packet = (PresencePacket) processPacket(currentTag,
491 PACKET_PRESENCE);
492 String id = packet.getAttribute("id");
493 if ((id != null) && (packetCallbacks.containsKey(id))) {
494 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
495 ((OnPresencePacketReceived) packetCallbacks.get(id))
496 .onPresencePacketReceived(account, packet);
497 }
498 packetCallbacks.remove(id);
499 } else if (this.presenceListener != null) {
500 this.presenceListener.onPresencePacketReceived(account, packet);
501 }
502 }
503
504 private void sendCompressionZlib() throws IOException {
505 Element compress = new Element("compress");
506 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
507 compress.addChild("method").setContent("zlib");
508 tagWriter.writeElement(compress);
509 }
510
511 private void switchOverToZLib(final Tag currentTag)
512 throws XmlPullParserException, IOException,
513 NoSuchAlgorithmException {
514 tagReader.readTag(); // read tag close
515 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
516 .getOutputStream()));
517 tagReader
518 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
519
520 sendStartStream();
521 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": compression enabled");
522 usingCompression = true;
523 processStream(tagReader.readTag());
524 }
525
526 private void sendStartTLS() throws IOException {
527 Tag startTLS = Tag.empty("starttls");
528 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
529 tagWriter.writeTag(startTLS);
530 }
531
532 private SharedPreferences getPreferences() {
533 return PreferenceManager
534 .getDefaultSharedPreferences(applicationContext);
535 }
536
537 private boolean enableLegacySSL() {
538 return getPreferences().getBoolean("enable_legacy_ssl", false);
539 }
540
541 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException,
542 IOException {
543 tagReader.readTag();
544 try {
545 SSLContext sc = SSLContext.getInstance("TLS");
546 sc.init(null,
547 new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},
548 mXmppConnectionService.getRNG());
549 SSLSocketFactory factory = sc.getSocketFactory();
550
551 if (factory == null) {
552 throw new IOException("SSLSocketFactory was null");
553 }
554
555 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
556
557 if (socket == null) {
558 throw new IOException("socket was null");
559 }
560 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,
561 socket.getInetAddress().getHostAddress(), socket.getPort(),
562 true);
563
564 // Support all protocols except legacy SSL.
565 // The min SDK version prevents us having to worry about SSLv2. In
566 // future, this may be true of SSLv3 as well.
567 final String[] supportProtocols;
568 if (enableLegacySSL()) {
569 supportProtocols = sslSocket.getSupportedProtocols();
570 } else {
571 final List<String> supportedProtocols = new LinkedList<>(
572 Arrays.asList(sslSocket.getSupportedProtocols()));
573 supportedProtocols.remove("SSLv3");
574 supportProtocols = new String[supportedProtocols.size()];
575 supportedProtocols.toArray(supportProtocols);
576 }
577 sslSocket.setEnabledProtocols(supportProtocols);
578
579 if (verifier != null
580 && !verifier.verify(account.getServer().getDomainpart(),
581 sslSocket.getSession())) {
582 sslSocket.close();
583 throw new IOException("host mismatch in TLS connection");
584 }
585 tagReader.setInputStream(sslSocket.getInputStream());
586 tagWriter.setOutputStream(sslSocket.getOutputStream());
587 sendStartStream();
588 Log.d(Config.LOGTAG, account.getJid().toBareJid()
589 + ": TLS connection established");
590 usingEncryption = true;
591 processStream(tagReader.readTag());
592 sslSocket.close();
593 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
594 e1.printStackTrace();
595 }
596 }
597
598 private void processStreamFeatures(Tag currentTag)
599 throws XmlPullParserException, IOException {
600 this.streamFeatures = tagReader.readElement(currentTag);
601 if (this.streamFeatures.hasChild("starttls") && !usingEncryption) {
602 sendStartTLS();
603 } else if (compressionAvailable()) {
604 sendCompressionZlib();
605 } else if (this.streamFeatures.hasChild("register")
606 && account.isOptionSet(Account.OPTION_REGISTER)
607 && usingEncryption) {
608 sendRegistryRequest();
609 } else if (!this.streamFeatures.hasChild("register")
610 && account.isOptionSet(Account.OPTION_REGISTER)) {
611 changeStatus(Account.STATUS_REGISTRATION_NOT_SUPPORTED);
612 disconnect(true);
613 } else if (this.streamFeatures.hasChild("mechanisms")
614 && shouldAuthenticate && usingEncryption) {
615 final List<String> mechanisms = extractMechanisms(streamFeatures
616 .findChild("mechanisms"));
617 final Element auth = new Element("auth");
618 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
619 if (mechanisms.contains("DIGEST-MD5")) {
620 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
621 } else if (mechanisms.contains("PLAIN")) {
622 saslMechanism = new Plain(tagWriter, account);
623 auth.setContent(((Plain)saslMechanism).getStartAuth());
624 }
625 auth.setAttribute("mechanism", saslMechanism.getMechanism());
626 tagWriter.writeElement(auth);
627 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
628 + smVersion)
629 && streamId != null) {
630 ResumePacket resume = new ResumePacket(this.streamId,
631 stanzasReceived, smVersion);
632 this.tagWriter.writeStanzaAsync(resume);
633 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
634 sendBindRequest();
635 } else {
636 Log.d(Config.LOGTAG, account.getJid().toBareJid()
637 + ": incompatible server. disconnecting");
638 disconnect(true);
639 }
640 }
641
642 private boolean compressionAvailable() {
643 if (!this.streamFeatures.hasChild("compression",
644 "http://jabber.org/features/compress"))
645 return false;
646 if (!ZLibOutputStream.SUPPORTED)
647 return false;
648 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
649 return false;
650
651 Element compression = this.streamFeatures.findChild("compression",
652 "http://jabber.org/features/compress");
653 for (Element child : compression.getChildren()) {
654 if (!"method".equals(child.getName()))
655 continue;
656
657 if ("zlib".equalsIgnoreCase(child.getContent())) {
658 return true;
659 }
660 }
661 return false;
662 }
663
664 private List<String> extractMechanisms(Element stream) {
665 ArrayList<String> mechanisms = new ArrayList<>(stream
666 .getChildren().size());
667 for (Element child : stream.getChildren()) {
668 mechanisms.add(child.getContent());
669 }
670 return mechanisms;
671 }
672
673 private void sendRegistryRequest() {
674 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
675 register.query("jabber:iq:register");
676 register.setTo(account.getServer());
677 sendIqPacket(register, new OnIqPacketReceived() {
678
679 @Override
680 public void onIqPacketReceived(Account account, IqPacket packet) {
681 Element instructions = packet.query().findChild("instructions");
682 if (packet.query().hasChild("username")
683 && (packet.query().hasChild("password"))) {
684 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
685 Element username = new Element("username")
686 .setContent(account.getUsername());
687 Element password = new Element("password")
688 .setContent(account.getPassword());
689 register.query("jabber:iq:register").addChild(username);
690 register.query().addChild(password);
691 sendIqPacket(register, new OnIqPacketReceived() {
692
693 @Override
694 public void onIqPacketReceived(Account account,
695 IqPacket packet) {
696 if (packet.getType() == IqPacket.TYPE_RESULT) {
697 account.setOption(Account.OPTION_REGISTER,
698 false);
699 changeStatus(Account.STATUS_REGISTRATION_SUCCESSFULL);
700 } else if (packet.hasChild("error")
701 && (packet.findChild("error")
702 .hasChild("conflict"))) {
703 changeStatus(Account.STATUS_REGISTRATION_CONFLICT);
704 } else {
705 changeStatus(Account.STATUS_REGISTRATION_FAILED);
706 Log.d(Config.LOGTAG, packet.toString());
707 }
708 disconnect(true);
709 }
710 });
711 } else {
712 changeStatus(Account.STATUS_REGISTRATION_FAILED);
713 disconnect(true);
714 Log.d(Config.LOGTAG, account.getJid().toBareJid()
715 + ": could not register. instructions are"
716 + instructions.getContent());
717 }
718 }
719 });
720 }
721
722 private void sendBindRequest() throws IOException {
723 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
724 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
725 .addChild("resource").setContent(account.getResource());
726 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
727 @Override
728 public void onIqPacketReceived(Account account, IqPacket packet) {
729 Element bind = packet.findChild("bind");
730 if (bind != null) {
731 final Element jid = bind.findChild("jid");
732 if (jid != null && jid.getContent() != null) {
733 try {
734 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
735 } catch (final InvalidJidException e) {
736 // TODO: Handle the case where an external JID is technically invalid?
737 }
738 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
739 smVersion = 3;
740 EnablePacket enable = new EnablePacket(smVersion);
741 tagWriter.writeStanzaAsync(enable);
742 stanzasSent = 0;
743 messageReceipts.clear();
744 } else if (streamFeatures.hasChild("sm",
745 "urn:xmpp:sm:2")) {
746 smVersion = 2;
747 EnablePacket enable = new EnablePacket(smVersion);
748 tagWriter.writeStanzaAsync(enable);
749 stanzasSent = 0;
750 messageReceipts.clear();
751 }
752 sendServiceDiscoveryInfo(account.getServer());
753 sendServiceDiscoveryItems(account.getServer());
754 if (bindListener != null) {
755 bindListener.onBind(account);
756 }
757 sendInitialPing();
758 } else {
759 disconnect(true);
760 }
761 } else {
762 disconnect(true);
763 }
764 }
765 });
766 if (this.streamFeatures.hasChild("session")) {
767 Log.d(Config.LOGTAG, account.getJid().toBareJid()
768 + ": sending deprecated session");
769 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
770 startSession.addChild("session",
771 "urn:ietf:params:xml:ns:xmpp-session");
772 this.sendUnboundIqPacket(startSession, null);
773 }
774 }
775
776 private void sendServiceDiscoveryInfo(final Jid server) {
777 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
778 iq.setTo(server.toDomainJid());
779 iq.query("http://jabber.org/protocol/disco#info");
780 this.sendIqPacket(iq, new OnIqPacketReceived() {
781
782 @Override
783 public void onIqPacketReceived(Account account, IqPacket packet) {
784 final List<Element> elements = packet.query().getChildren();
785 final List<String> features = new ArrayList<>();
786 for (Element element : elements) {
787 if (element.getName().equals("feature")) {
788 features.add(element.getAttribute("var"));
789 }
790 }
791 disco.put(server.toDomainJid().toString(), features);
792
793 if (account.getServer().equals(server.toDomainJid())) {
794 enableAdvancedStreamFeatures();
795 }
796 }
797 });
798 }
799
800 private void enableAdvancedStreamFeatures() {
801 if (getFeatures().carbons()) {
802 sendEnableCarbons();
803 }
804 }
805
806 private void sendServiceDiscoveryItems(final Jid server) {
807 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
808 iq.setTo(server.toDomainJid());
809 iq.query("http://jabber.org/protocol/disco#items");
810 this.sendIqPacket(iq, new OnIqPacketReceived() {
811
812 @Override
813 public void onIqPacketReceived(Account account, IqPacket packet) {
814 List<Element> elements = packet.query().getChildren();
815 for (Element element : elements) {
816 if (element.getName().equals("item")) {
817 final String jid = element.getAttribute("jid");
818 try {
819 sendServiceDiscoveryInfo(Jid.fromString(jid).toDomainJid());
820 } catch (final InvalidJidException ignored) {
821 // TODO: Handle the case where an external JID is technically invalid?
822 }
823 }
824 }
825 }
826 });
827 }
828
829 private void sendEnableCarbons() {
830 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
831 iq.addChild("enable", "urn:xmpp:carbons:2");
832 this.sendIqPacket(iq, new OnIqPacketReceived() {
833
834 @Override
835 public void onIqPacketReceived(Account account, IqPacket packet) {
836 if (!packet.hasChild("error")) {
837 Log.d(Config.LOGTAG, account.getJid().toBareJid()
838 + ": successfully enabled carbons");
839 } else {
840 Log.d(Config.LOGTAG, account.getJid().toBareJid()
841 + ": error enableing carbons " + packet.toString());
842 }
843 }
844 });
845 }
846
847 private void processStreamError(Tag currentTag)
848 throws XmlPullParserException, IOException {
849 Element streamError = tagReader.readElement(currentTag);
850 if (streamError != null && streamError.hasChild("conflict")) {
851 final String resource = account.getResource().split("\\.")[0];
852 account.setResource(resource + "." + nextRandomId());
853 Log.d(Config.LOGTAG,
854 account.getJid().toBareJid() + ": switching resource due to conflict ("
855 + account.getResource() + ")");
856 }
857 }
858
859 private void sendStartStream() throws IOException {
860 Tag stream = Tag.start("stream:stream");
861 stream.setAttribute("from", account.getJid().toBareJid().toString());
862 stream.setAttribute("to", account.getServer().toString());
863 stream.setAttribute("version", "1.0");
864 stream.setAttribute("xml:lang", "en");
865 stream.setAttribute("xmlns", "jabber:client");
866 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
867 tagWriter.writeTag(stream);
868 }
869
870 private String nextRandomId() {
871 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
872 }
873
874 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
875 if (packet.getId() == null) {
876 String id = nextRandomId();
877 packet.setAttribute("id", id);
878 }
879 packet.setFrom(account.getJid());
880 this.sendPacket(packet, callback);
881 }
882
883 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
884 if (packet.getId() == null) {
885 String id = nextRandomId();
886 packet.setAttribute("id", id);
887 }
888 this.sendPacket(packet, callback);
889 }
890
891 public void sendMessagePacket(MessagePacket packet) {
892 this.sendPacket(packet, null);
893 }
894
895 public void sendPresencePacket(PresencePacket packet) {
896 this.sendPacket(packet, null);
897 }
898
899 private synchronized void sendPacket(final AbstractStanza packet,
900 PacketReceived callback) {
901 if (packet.getName().equals("iq") || packet.getName().equals("message")
902 || packet.getName().equals("presence")) {
903 ++stanzasSent;
904 }
905 tagWriter.writeStanzaAsync(packet);
906 if (packet instanceof MessagePacket && packet.getId() != null
907 && this.streamId != null) {
908 Log.d(Config.LOGTAG, "request delivery report for stanza "
909 + stanzasSent);
910 this.messageReceipts.put(stanzasSent, packet.getId());
911 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
912 }
913 if (callback != null) {
914 if (packet.getId() == null) {
915 packet.setId(nextRandomId());
916 }
917 packetCallbacks.put(packet.getId(), callback);
918 }
919 }
920
921 public void sendPing() {
922 if (streamFeatures.hasChild("sm")) {
923 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
924 } else {
925 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
926 iq.setFrom(account.getJid());
927 iq.addChild("ping", "urn:xmpp:ping");
928 this.sendIqPacket(iq, null);
929 }
930 this.lastPingSent = SystemClock.elapsedRealtime();
931 }
932
933 public void setOnMessagePacketReceivedListener(
934 OnMessagePacketReceived listener) {
935 this.messageListener = listener;
936 }
937
938 public void setOnUnregisteredIqPacketReceivedListener(
939 OnIqPacketReceived listener) {
940 this.unregisteredIqListener = listener;
941 }
942
943 public void setOnPresencePacketReceivedListener(
944 OnPresencePacketReceived listener) {
945 this.presenceListener = listener;
946 }
947
948 public void setOnJinglePacketReceivedListener(
949 OnJinglePacketReceived listener) {
950 this.jingleListener = listener;
951 }
952
953 public void setOnStatusChangedListener(OnStatusChanged listener) {
954 this.statusListener = listener;
955 }
956
957 public void setOnBindListener(OnBindListener listener) {
958 this.bindListener = listener;
959 }
960
961 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
962 this.acknowledgedListener = listener;
963 }
964
965 public void disconnect(boolean force) {
966 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
967 try {
968 if (force) {
969 socket.close();
970 return;
971 }
972 new Thread(new Runnable() {
973
974 @Override
975 public void run() {
976 if (tagWriter.isActive()) {
977 tagWriter.finish();
978 try {
979 while (!tagWriter.finished()) {
980 Log.d(Config.LOGTAG, "not yet finished");
981 Thread.sleep(100);
982 }
983 tagWriter.writeTag(Tag.end("stream:stream"));
984 socket.close();
985 } catch (IOException e) {
986 Log.d(Config.LOGTAG,
987 "io exception during disconnect");
988 } catch (InterruptedException e) {
989 Log.d(Config.LOGTAG, "interrupted");
990 }
991 }
992 }
993 }).start();
994 } catch (IOException e) {
995 Log.d(Config.LOGTAG, "io exception during disconnect");
996 }
997 }
998
999 public List<String> findDiscoItemsByFeature(String feature) {
1000 final List<String> items = new ArrayList<>();
1001 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1002 if (cursor.getValue().contains(feature)) {
1003 items.add(cursor.getKey());
1004 }
1005 }
1006 return items;
1007 }
1008
1009 public String findDiscoItemByFeature(String feature) {
1010 List<String> items = findDiscoItemsByFeature(feature);
1011 if (items.size() >= 1) {
1012 return items.get(0);
1013 }
1014 return null;
1015 }
1016
1017 public void r() {
1018 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1019 }
1020
1021 public String getMucServer() {
1022 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1023 }
1024
1025 public int getTimeToNextAttempt() {
1026 int interval = (int) (25 * Math.pow(1.5, attempt));
1027 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1028 return interval - secondsSinceLast;
1029 }
1030
1031 public int getAttempt() {
1032 return this.attempt;
1033 }
1034
1035 public Features getFeatures() {
1036 return this.features;
1037 }
1038
1039 public long getLastSessionEstablished() {
1040 long diff;
1041 if (this.lastSessionStarted == 0) {
1042 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1043 } else {
1044 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1045 }
1046 return System.currentTimeMillis() - diff;
1047 }
1048
1049 public long getLastConnect() {
1050 return this.lastConnect;
1051 }
1052
1053 public long getLastPingSent() {
1054 return this.lastPingSent;
1055 }
1056
1057 public long getLastPacketReceived() {
1058 return this.lastPaketReceived;
1059 }
1060
1061 public void sendActive() {
1062 this.sendPacket(new ActivePacket(), null);
1063 }
1064
1065 public void sendInactive() {
1066 this.sendPacket(new InactivePacket(), null);
1067 }
1068
1069 public class Features {
1070 XmppConnection connection;
1071
1072 public Features(XmppConnection connection) {
1073 this.connection = connection;
1074 }
1075
1076 private boolean hasDiscoFeature(final Jid server, final String feature) {
1077 return connection.disco.containsKey(server.toDomainJid().toString()) &&
1078 connection.disco.get(server.toDomainJid().toString()).contains(feature);
1079 }
1080
1081 public boolean carbons() {
1082 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1083 }
1084
1085 public boolean sm() {
1086 return streamId != null;
1087 }
1088
1089 public boolean csi() {
1090 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1091 }
1092
1093 public boolean pubsub() {
1094 return hasDiscoFeature(account.getServer(),
1095 "http://jabber.org/protocol/pubsub#publish");
1096 }
1097
1098 public boolean mam() {
1099 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1100 }
1101
1102 public boolean rosterVersioning() {
1103 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1104 }
1105
1106 public boolean streamhost() {
1107 return connection
1108 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1109 }
1110
1111 public boolean compression() {
1112 return connection.usingCompression;
1113 }
1114 }
1115}