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.json.JSONException;
16import org.json.JSONObject;
17import org.xmlpull.v1.XmlPullParserException;
18
19import java.io.IOException;
20import java.io.InputStream;
21import java.io.OutputStream;
22import java.math.BigInteger;
23import java.net.ConnectException;
24import java.net.IDN;
25import java.net.InetAddress;
26import java.net.InetSocketAddress;
27import java.net.Socket;
28import java.net.UnknownHostException;
29import java.security.KeyManagementException;
30import java.security.NoSuchAlgorithmException;
31import java.util.ArrayList;
32import java.util.Arrays;
33import java.util.Collection;
34import java.util.HashMap;
35import java.util.Hashtable;
36import java.util.LinkedList;
37import java.util.List;
38import java.util.Map;
39import java.util.Map.Entry;
40
41import javax.net.ssl.HostnameVerifier;
42import javax.net.ssl.SSLContext;
43import javax.net.ssl.SSLSocket;
44import javax.net.ssl.SSLSocketFactory;
45import javax.net.ssl.X509TrustManager;
46
47import eu.siacs.conversations.Config;
48import eu.siacs.conversations.crypto.sasl.DigestMd5;
49import eu.siacs.conversations.crypto.sasl.Plain;
50import eu.siacs.conversations.crypto.sasl.SaslMechanism;
51import eu.siacs.conversations.crypto.sasl.ScramSha1;
52import eu.siacs.conversations.entities.Account;
53import eu.siacs.conversations.generator.IqGenerator;
54import eu.siacs.conversations.services.XmppConnectionService;
55import eu.siacs.conversations.utils.DNSHelper;
56import eu.siacs.conversations.utils.Xmlns;
57import eu.siacs.conversations.xml.Element;
58import eu.siacs.conversations.xml.Tag;
59import eu.siacs.conversations.xml.TagWriter;
60import eu.siacs.conversations.xml.XmlReader;
61import eu.siacs.conversations.xmpp.jid.InvalidJidException;
62import eu.siacs.conversations.xmpp.jid.Jid;
63import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
64import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
65import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
66import eu.siacs.conversations.xmpp.stanzas.IqPacket;
67import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
68import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
69import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
70import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
71import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
72import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
73import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
74import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
75
76public class XmppConnection implements Runnable {
77
78 private static final int PACKET_IQ = 0;
79 private static final int PACKET_MESSAGE = 1;
80 private static final int PACKET_PRESENCE = 2;
81 private final Context applicationContext;
82 protected Account account;
83 private final WakeLock wakeLock;
84 private Socket socket;
85 private XmlReader tagReader;
86 private TagWriter tagWriter;
87 private final Features features = new Features(this);
88 private boolean shouldBind = true;
89 private boolean shouldAuthenticate = true;
90 private Element streamFeatures;
91 private final HashMap<String, List<String>> disco = new HashMap<>();
92
93 private String streamId = null;
94 private int smVersion = 3;
95 private final SparseArray<String> messageReceipts = new SparseArray<>();
96
97 private boolean enabledEncryption = false;
98 private boolean enabledCarbons = false;
99
100 private int stanzasReceived = 0;
101 private int stanzasSent = 0;
102 private long lastPaketReceived = 0;
103 private long lastPingSent = 0;
104 private long lastConnect = 0;
105 private long lastSessionStarted = 0;
106 private int attempt = 0;
107 private final Map<String, OnIqPacketReceived> packetCallbacks = new Hashtable<>();
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 final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
115 private OnMessageAcknowledged acknowledgedListener = null;
116 private XmppConnectionService mXmppConnectionService = null;
117
118 private SaslMechanism saslMechanism;
119
120 public XmppConnection(final Account account, final XmppConnectionService service) {
121 this.account = account;
122 this.wakeLock = service.getPowerManager().newWakeLock(
123 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
124 tagWriter = new TagWriter();
125 mXmppConnectionService = service;
126 applicationContext = service.getApplicationContext();
127 }
128
129 protected void changeStatus(final Account.State nextStatus) {
130 if (account.getStatus() != nextStatus) {
131 if ((nextStatus == Account.State.OFFLINE)
132 && (account.getStatus() != Account.State.CONNECTING)
133 && (account.getStatus() != Account.State.ONLINE)
134 && (account.getStatus() != Account.State.DISABLED)) {
135 return;
136 }
137 if (nextStatus == Account.State.ONLINE) {
138 this.attempt = 0;
139 }
140 account.setStatus(nextStatus);
141 if (statusListener != null) {
142 statusListener.onStatusChanged(account);
143 }
144 }
145 }
146
147 protected void connect() {
148 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
149 enabledEncryption = 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.State.CONNECTING);
160 final Bundle result = DNSHelper.getSRVRecord(account.getServer());
161 final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
162 if ("timeout".equals(result.getString("error"))) {
163 throw new IOException("timeout in dns");
164 } else if (values != null) {
165 int i = 0;
166 boolean socketError = true;
167 while (socketError && values.size() > i) {
168 final Bundle namePort = (Bundle) values.get(i);
169 try {
170 String srvRecordServer;
171 try {
172 srvRecordServer=IDN.toASCII(namePort.getString("name"));
173 } catch (final IllegalArgumentException e) {
174 // TODO: Handle me?`
175 srvRecordServer = "";
176 }
177 final int srvRecordPort = namePort.getInt("port");
178 final String srvIpServer = namePort.getString("ip");
179 final InetSocketAddress addr;
180 if (srvIpServer != null) {
181 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
182 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
183 + ": using values from dns " + srvRecordServer
184 + "[" + srvIpServer + "]:" + srvRecordPort);
185 } else {
186 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
187 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
188 + ": using values from dns "
189 + srvRecordServer + ":" + srvRecordPort);
190 }
191 socket = new Socket();
192 socket.connect(addr, 20000);
193 socketError = false;
194 } catch (final UnknownHostException e) {
195 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
196 i++;
197 } catch (final IOException e) {
198 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
199 i++;
200 }
201 }
202 if (socketError) {
203 throw new UnknownHostException();
204 }
205 } else if (result.containsKey("error")
206 && "nosrv".equals(result.getString("error", null))) {
207 socket = new Socket(account.getServer().getDomainpart(), 5222);
208 } else {
209 throw new IOException("timeout in dns");
210 }
211 final OutputStream out = socket.getOutputStream();
212 tagWriter.setOutputStream(out);
213 final InputStream in = socket.getInputStream();
214 tagReader.setInputStream(in);
215 tagWriter.beginDocument();
216 sendStartStream();
217 Tag nextTag;
218 while ((nextTag = tagReader.readTag()) != null) {
219 if (nextTag.isStart("stream")) {
220 processStream(nextTag);
221 break;
222 } else {
223 throw new IOException("unknown tag on connect");
224 }
225 }
226 if (socket.isConnected()) {
227 socket.close();
228 }
229 } catch (final UnknownHostException | ConnectException e) {
230 this.changeStatus(Account.State.SERVER_NOT_FOUND);
231 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
232 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
233 this.changeStatus(Account.State.OFFLINE);
234 } finally {
235 if (wakeLock.isHeld()) {
236 try {
237 wakeLock.release();
238 } catch (final RuntimeException ignored) {
239 }
240 }
241 }
242 }
243
244 @Override
245 public void run() {
246 connect();
247 }
248
249 private void processStream(final Tag currentTag) throws XmlPullParserException,
250 IOException, NoSuchAlgorithmException {
251 Tag nextTag = tagReader.readTag();
252
253 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
254 if (nextTag.isStart("error")) {
255 processStreamError(nextTag);
256 } else if (nextTag.isStart("features")) {
257 processStreamFeatures(nextTag);
258 } else if (nextTag.isStart("proceed")) {
259 switchOverToTls(nextTag);
260 } else if (nextTag.isStart("success")) {
261 final String challenge = tagReader.readElement(nextTag).getContent();
262 try {
263 saslMechanism.getResponse(challenge);
264 } catch (final SaslMechanism.AuthenticationException e) {
265 disconnect(true);
266 Log.e(Config.LOGTAG, String.valueOf(e));
267 }
268 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
269 account.setKey(Account.PINNED_MECHANISM_KEY,
270 String.valueOf(saslMechanism.getPriority()));
271 tagReader.reset();
272 sendStartStream();
273 processStream(tagReader.readTag());
274 break;
275 } else if (nextTag.isStart("failure")) {
276 tagReader.readElement(nextTag);
277 changeStatus(Account.State.UNAUTHORIZED);
278 } else if (nextTag.isStart("challenge")) {
279 final String challenge = tagReader.readElement(nextTag).getContent();
280 final Element response = new Element("response");
281 response.setAttribute("xmlns",
282 "urn:ietf:params:xml:ns:xmpp-sasl");
283 try {
284 response.setContent(saslMechanism.getResponse(challenge));
285 } catch (final SaslMechanism.AuthenticationException e) {
286 // TODO: Send auth abort tag.
287 Log.e(Config.LOGTAG, e.toString());
288 }
289 tagWriter.writeElement(response);
290 } else if (nextTag.isStart("enabled")) {
291 final Element enabled = tagReader.readElement(nextTag);
292 if ("true".equals(enabled.getAttribute("resume"))) {
293 this.streamId = enabled.getAttribute("id");
294 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
295 + ": stream managment(" + smVersion
296 + ") enabled (resumable)");
297 } else {
298 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
299 + ": stream managment(" + smVersion + ") enabled");
300 }
301 this.lastSessionStarted = SystemClock.elapsedRealtime();
302 this.stanzasReceived = 0;
303 final RequestPacket r = new RequestPacket(smVersion);
304 tagWriter.writeStanzaAsync(r);
305 } else if (nextTag.isStart("resumed")) {
306 lastPaketReceived = SystemClock.elapsedRealtime();
307 final Element resumed = tagReader.readElement(nextTag);
308 final String h = resumed.getAttribute("h");
309 try {
310 final int serverCount = Integer.parseInt(h);
311 if (serverCount != stanzasSent) {
312 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
313 + ": session resumed with lost packages");
314 stanzasSent = serverCount;
315 } else {
316 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
317 + ": session resumed");
318 }
319 if (acknowledgedListener != null) {
320 for (int i = 0; i < messageReceipts.size(); ++i) {
321 if (serverCount >= messageReceipts.keyAt(i)) {
322 acknowledgedListener.onMessageAcknowledged(
323 account, messageReceipts.valueAt(i));
324 }
325 }
326 }
327 messageReceipts.clear();
328 } catch (final NumberFormatException ignored) {
329 }
330 sendServiceDiscoveryInfo(account.getServer());
331 sendServiceDiscoveryItems(account.getServer());
332 sendInitialPing();
333 } else if (nextTag.isStart("r")) {
334 tagReader.readElement(nextTag);
335 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
336 tagWriter.writeStanzaAsync(ack);
337 } else if (nextTag.isStart("a")) {
338 final Element ack = tagReader.readElement(nextTag);
339 lastPaketReceived = SystemClock.elapsedRealtime();
340 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
341 final String msgId = this.messageReceipts.get(serverSequence);
342 if (msgId != null) {
343 if (this.acknowledgedListener != null) {
344 this.acknowledgedListener.onMessageAcknowledged(
345 account, msgId);
346 }
347 this.messageReceipts.remove(serverSequence);
348 }
349 } else if (nextTag.isStart("failed")) {
350 tagReader.readElement(nextTag);
351 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
352 streamId = null;
353 if (account.getStatus() != Account.State.ONLINE) {
354 sendBindRequest();
355 }
356 } else if (nextTag.isStart("iq")) {
357 processIq(nextTag);
358 } else if (nextTag.isStart("message")) {
359 processMessage(nextTag);
360 } else if (nextTag.isStart("presence")) {
361 processPresence(nextTag);
362 }
363 nextTag = tagReader.readTag();
364 }
365 if (account.getStatus() == Account.State.ONLINE) {
366 account. setStatus(Account.State.OFFLINE);
367 if (statusListener != null) {
368 statusListener.onStatusChanged(account);
369 }
370 }
371 }
372
373 private void sendInitialPing() {
374 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
375 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
376 iq.setFrom(account.getJid());
377 iq.addChild("ping", "urn:xmpp:ping");
378 this.sendIqPacket(iq, new OnIqPacketReceived() {
379 @Override
380 public void onIqPacketReceived(final Account account, final IqPacket packet) {
381 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
382 + ": online with resource " + account.getResource());
383 changeStatus(Account.State.ONLINE);
384 }
385 });
386 }
387
388 private Element processPacket(final Tag currentTag, final int packetType)
389 throws XmlPullParserException, IOException {
390 Element element;
391 switch (packetType) {
392 case PACKET_IQ:
393 element = new IqPacket();
394 break;
395 case PACKET_MESSAGE:
396 element = new MessagePacket();
397 break;
398 case PACKET_PRESENCE:
399 element = new PresencePacket();
400 break;
401 default:
402 return null;
403 }
404 element.setAttributes(currentTag.getAttributes());
405 Tag nextTag = tagReader.readTag();
406 if (nextTag == null) {
407 throw new IOException("interrupted mid tag");
408 }
409 while (!nextTag.isEnd(element.getName())) {
410 if (!nextTag.isNo()) {
411 final Element child = tagReader.readElement(nextTag);
412 final String type = currentTag.getAttribute("type");
413 if (packetType == PACKET_IQ
414 && "jingle".equals(child.getName())
415 && ("set".equalsIgnoreCase(type) || "get"
416 .equalsIgnoreCase(type))) {
417 element = new JinglePacket();
418 element.setAttributes(currentTag.getAttributes());
419 }
420 element.addChild(child);
421 }
422 nextTag = tagReader.readTag();
423 if (nextTag == null) {
424 throw new IOException("interrupted mid tag");
425 }
426 }
427 ++stanzasReceived;
428 lastPaketReceived = SystemClock.elapsedRealtime();
429 return element;
430 }
431
432 private void processIq(final Tag currentTag) throws XmlPullParserException,
433 IOException {
434 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
435
436 if (packet.getId() == null) {
437 return; // an iq packet without id is definitely invalid
438 }
439
440 if (packet instanceof JinglePacket) {
441 if (this.jingleListener != null) {
442 this.jingleListener.onJinglePacketReceived(account,
443 (JinglePacket) packet);
444 }
445 } else {
446 if (packetCallbacks.containsKey(packet.getId())) {
447 packetCallbacks.get(packet.getId()).onIqPacketReceived(account, packet);
448 packetCallbacks.remove(packet.getId());
449 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
450 .getType() == IqPacket.TYPE_SET)
451 && this.unregisteredIqListener != null) {
452 this.unregisteredIqListener.onIqPacketReceived(account, packet);
453 }
454 }
455 }
456
457 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
458 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
459 this.messageListener.onMessagePacketReceived(account, packet);
460 }
461
462 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
463 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
464 this.presenceListener.onPresencePacketReceived(account, packet);
465 }
466
467 private void sendStartTLS() throws IOException {
468 final Tag startTLS = Tag.empty("starttls");
469 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
470 tagWriter.writeTag(startTLS);
471 }
472
473 private SharedPreferences getPreferences() {
474 return PreferenceManager.getDefaultSharedPreferences(applicationContext);
475 }
476
477 private boolean enableLegacySSL() {
478 return getPreferences().getBoolean("enable_legacy_ssl", false);
479 }
480
481 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
482 tagReader.readTag();
483 try {
484 final SSLContext sc = SSLContext.getInstance("TLS");
485 sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG());
486 final SSLSocketFactory factory = sc.getSocketFactory();
487 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
488 final InetAddress address = socket == null ? null : socket.getInetAddress();
489
490 if (factory == null || address == null || verifier == null) {
491 throw new IOException("could not setup ssl");
492 }
493
494 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
495
496 if (sslSocket == null) {
497 throw new IOException("could not initialize ssl socket");
498 }
499
500 final String[] supportProtocols;
501 if (enableLegacySSL()) {
502 supportProtocols = sslSocket.getSupportedProtocols();
503 } else {
504 final Collection<String> supportedProtocols = new LinkedList<>(
505 Arrays.asList(sslSocket.getSupportedProtocols()));
506 supportedProtocols.remove("SSLv3");
507 supportProtocols = new String[supportedProtocols.size()];
508 supportedProtocols.toArray(supportProtocols);
509 }
510 sslSocket.setEnabledProtocols(supportProtocols);
511
512 if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
513 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
514 disconnect(true);
515 changeStatus(Account.State.SECURITY_ERROR);
516 }
517 tagReader.setInputStream(sslSocket.getInputStream());
518 tagWriter.setOutputStream(sslSocket.getOutputStream());
519 sendStartStream();
520 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
521 enabledEncryption = true;
522 processStream(tagReader.readTag());
523 sslSocket.close();
524 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
525 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
526 disconnect(true);
527 changeStatus(Account.State.SECURITY_ERROR);
528 }
529 }
530
531 private void processStreamFeatures(final Tag currentTag)
532 throws XmlPullParserException, IOException {
533 this.streamFeatures = tagReader.readElement(currentTag);
534 if (this.streamFeatures.hasChild("starttls") && !enabledEncryption) {
535 sendStartTLS();
536 } else if (this.streamFeatures.hasChild("register")
537 && account.isOptionSet(Account.OPTION_REGISTER)
538 && enabledEncryption) {
539 sendRegistryRequest();
540 } else if (!this.streamFeatures.hasChild("register")
541 && account.isOptionSet(Account.OPTION_REGISTER)) {
542 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
543 disconnect(true);
544 } else if (this.streamFeatures.hasChild("mechanisms")
545 && shouldAuthenticate && enabledEncryption) {
546 final List<String> mechanisms = extractMechanisms(streamFeatures
547 .findChild("mechanisms"));
548 final Element auth = new Element("auth");
549 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
550 if (mechanisms.contains("SCRAM-SHA-1")) {
551 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
552 } else if (mechanisms.contains("PLAIN")) {
553 saslMechanism = new Plain(tagWriter, account);
554 } else if (mechanisms.contains("DIGEST-MD5")) {
555 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
556 }
557 final JSONObject keys = account.getKeys();
558 try {
559 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
560 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
561 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
562 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
563 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
564 "). Possible downgrade attack?");
565 disconnect(true);
566 changeStatus(Account.State.SECURITY_ERROR);
567 }
568 } catch (final JSONException e) {
569 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
570 }
571 Log.d(Config.LOGTAG,account.getJid().toString()+": Authenticating with " + saslMechanism.getMechanism());
572 auth.setAttribute("mechanism", saslMechanism.getMechanism());
573 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
574 auth.setContent(saslMechanism.getClientFirstMessage());
575 }
576 tagWriter.writeElement(auth);
577 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
578 + smVersion)
579 && streamId != null) {
580 final ResumePacket resume = new ResumePacket(this.streamId,
581 stanzasReceived, smVersion);
582 this.tagWriter.writeStanzaAsync(resume);
583 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
584 sendBindRequest();
585 } else {
586 disconnect(true);
587 changeStatus(Account.State.INCOMPATIBLE_SERVER);
588 }
589 }
590
591 private List<String> extractMechanisms(final Element stream) {
592 final ArrayList<String> mechanisms = new ArrayList<>(stream
593 .getChildren().size());
594 for (final Element child : stream.getChildren()) {
595 mechanisms.add(child.getContent());
596 }
597 return mechanisms;
598 }
599
600 private void sendRegistryRequest() {
601 final IqPacket register = new IqPacket(IqPacket.TYPE_GET);
602 register.query("jabber:iq:register");
603 register.setTo(account.getServer());
604 sendIqPacket(register, new OnIqPacketReceived() {
605
606 @Override
607 public void onIqPacketReceived(final Account account, final IqPacket packet) {
608 final Element instructions = packet.query().findChild("instructions");
609 if (packet.query().hasChild("username")
610 && (packet.query().hasChild("password"))) {
611 final IqPacket register = new IqPacket(IqPacket.TYPE_SET);
612 final Element username = new Element("username")
613 .setContent(account.getUsername());
614 final Element password = new Element("password")
615 .setContent(account.getPassword());
616 register.query("jabber:iq:register").addChild(username);
617 register.query().addChild(password);
618 sendIqPacket(register, new OnIqPacketReceived() {
619
620 @Override
621 public void onIqPacketReceived(final Account account, final IqPacket packet) {
622 if (packet.getType() == IqPacket.TYPE_RESULT) {
623 account.setOption(Account.OPTION_REGISTER,
624 false);
625 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
626 } else if (packet.hasChild("error")
627 && (packet.findChild("error")
628 .hasChild("conflict"))) {
629 changeStatus(Account.State.REGISTRATION_CONFLICT);
630 } else {
631 changeStatus(Account.State.REGISTRATION_FAILED);
632 Log.d(Config.LOGTAG, packet.toString());
633 }
634 disconnect(true);
635 }
636 });
637 } else {
638 changeStatus(Account.State.REGISTRATION_FAILED);
639 disconnect(true);
640 Log.d(Config.LOGTAG, account.getJid().toBareJid()
641 + ": could not register. instructions are"
642 + instructions.getContent());
643 }
644 }
645 });
646 }
647
648 private void sendBindRequest() {
649 final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
650 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
651 .addChild("resource").setContent(account.getResource());
652 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
653 @Override
654 public void onIqPacketReceived(final Account account, final IqPacket packet) {
655 final Element bind = packet.findChild("bind");
656 if (bind != null) {
657 final Element jid = bind.findChild("jid");
658 if (jid != null && jid.getContent() != null) {
659 try {
660 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
661 } catch (final InvalidJidException e) {
662 // TODO: Handle the case where an external JID is technically invalid?
663 }
664 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
665 smVersion = 3;
666 final EnablePacket enable = new EnablePacket(smVersion);
667 tagWriter.writeStanzaAsync(enable);
668 stanzasSent = 0;
669 messageReceipts.clear();
670 } else if (streamFeatures.hasChild("sm",
671 "urn:xmpp:sm:2")) {
672 smVersion = 2;
673 final EnablePacket enable = new EnablePacket(smVersion);
674 tagWriter.writeStanzaAsync(enable);
675 stanzasSent = 0;
676 messageReceipts.clear();
677 }
678 enabledCarbons = false;
679 disco.clear();
680 sendServiceDiscoveryInfo(account.getServer());
681 sendServiceDiscoveryItems(account.getServer());
682 if (bindListener != null) {
683 bindListener.onBind(account);
684 }
685 sendInitialPing();
686 } else {
687 disconnect(true);
688 }
689 } else {
690 disconnect(true);
691 }
692 }
693 });
694 if (this.streamFeatures.hasChild("session")) {
695 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending deprecated session");
696 final IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
697 startSession.addChild("session","urn:ietf:params:xml:ns:xmpp-session");
698 this.sendUnmodifiedIqPacket(startSession, null);
699 }
700 }
701
702 private void sendServiceDiscoveryInfo(final Jid server) {
703 if (disco.containsKey(server.toDomainJid().toString())) {
704 if (account.getServer().equals(server.toDomainJid())) {
705 enableAdvancedStreamFeatures();
706 }
707 } else {
708 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
709 iq.setTo(server.toDomainJid());
710 iq.query("http://jabber.org/protocol/disco#info");
711 this.sendIqPacket(iq, new OnIqPacketReceived() {
712
713 @Override
714 public void onIqPacketReceived(final Account account, final IqPacket packet) {
715 final List<Element> elements = packet.query().getChildren();
716 final List<String> features = new ArrayList<>();
717 for (final Element element : elements) {
718 if (element.getName().equals("identity")) {
719 if ("irc".equals(element.getAttribute("type"))) {
720 //add fake feature to not confuse irc and real muc
721 features.add("siacs:no:muc");
722 }
723 } else if (element.getName().equals("feature")) {
724 features.add(element.getAttribute("var"));
725 }
726 }
727 disco.put(server.toDomainJid().toString(), features);
728
729 if (account.getServer().equals(server.toDomainJid())) {
730 enableAdvancedStreamFeatures();
731 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
732 listener.onAdvancedStreamFeaturesAvailable(account);
733 }
734 }
735 }
736 });
737 }
738 }
739
740 private void enableAdvancedStreamFeatures() {
741 if (getFeatures().carbons()) {
742 if (!enabledCarbons) {
743 sendEnableCarbons();
744 }
745 }
746 if (getFeatures().blocking()) {
747 Log.d(Config.LOGTAG, "Requesting block list");
748 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
749 }
750 }
751
752 private void sendServiceDiscoveryItems(final Jid server) {
753 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
754 iq.setTo(server.toDomainJid());
755 iq.query("http://jabber.org/protocol/disco#items");
756 this.sendIqPacket(iq, new OnIqPacketReceived() {
757
758 @Override
759 public void onIqPacketReceived(final Account account, final IqPacket packet) {
760 final List<Element> elements = packet.query().getChildren();
761 for (final Element element : elements) {
762 if (element.getName().equals("item")) {
763 final Jid jid = element.getAttributeAsJid("jid");
764 if (jid != null && !jid.equals(account.getServer())) {
765 sendServiceDiscoveryInfo(jid);
766 }
767 }
768 }
769 }
770 });
771 }
772
773 private void sendEnableCarbons() {
774 final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
775 iq.addChild("enable", "urn:xmpp:carbons:2");
776 this.sendIqPacket(iq, new OnIqPacketReceived() {
777
778 @Override
779 public void onIqPacketReceived(final Account account, final IqPacket packet) {
780 if (!packet.hasChild("error")) {
781 Log.d(Config.LOGTAG, account.getJid().toBareJid()
782 + ": successfully enabled carbons");
783 enabledCarbons = true;
784 } else {
785 Log.d(Config.LOGTAG, account.getJid().toBareJid()
786 + ": error enableing carbons " + packet.toString());
787 }
788 }
789 });
790 }
791
792 private void processStreamError(final Tag currentTag)
793 throws XmlPullParserException, IOException {
794 final Element streamError = tagReader.readElement(currentTag);
795 if (streamError != null && streamError.hasChild("conflict")) {
796 final String resource = account.getResource().split("\\.")[0];
797 account.setResource(resource + "." + nextRandomId());
798 Log.d(Config.LOGTAG,
799 account.getJid().toBareJid() + ": switching resource due to conflict ("
800 + account.getResource() + ")");
801 }
802 }
803
804 private void sendStartStream() throws IOException {
805 final Tag stream = Tag.start("stream:stream");
806 stream.setAttribute("from", account.getJid().toBareJid().toString());
807 stream.setAttribute("to", account.getServer().toString());
808 stream.setAttribute("version", "1.0");
809 stream.setAttribute("xml:lang", "en");
810 stream.setAttribute("xmlns", "jabber:client");
811 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
812 tagWriter.writeTag(stream);
813 }
814
815 private String nextRandomId() {
816 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
817 }
818
819 public void sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
820 packet.setFrom(account.getJid());
821 this.sendUnmodifiedIqPacket(packet,callback);
822
823 }
824
825 private void sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
826 if (packet.getId() == null) {
827 final String id = nextRandomId();
828 packet.setAttribute("id", id);
829 }
830 if (callback != null) {
831 if (packet.getId() == null) {
832 packet.setId(nextRandomId());
833 }
834 packetCallbacks.put(packet.getId(), callback);
835 }
836 this.sendPacket(packet);
837 }
838
839 public void sendMessagePacket(final MessagePacket packet) {
840 this.sendPacket(packet);
841 }
842
843 public void sendPresencePacket(final PresencePacket packet) {
844 this.sendPacket(packet);
845 }
846
847 private synchronized void sendPacket(final AbstractStanza packet) {
848 final String name = packet.getName();
849 if (name.equals("iq") || name.equals("message") || name.equals("presence")) {
850 ++stanzasSent;
851 }
852 tagWriter.writeStanzaAsync(packet);
853 if (packet instanceof MessagePacket && packet.getId() != null && this.streamId != null) {
854 Log.d(Config.LOGTAG, "request delivery report for stanza " + stanzasSent);
855 this.messageReceipts.put(stanzasSent, packet.getId());
856 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
857 }
858 }
859
860 public void sendPing() {
861 if (streamFeatures.hasChild("sm")) {
862 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
863 } else {
864 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
865 iq.setFrom(account.getJid());
866 iq.addChild("ping", "urn:xmpp:ping");
867 this.sendIqPacket(iq, null);
868 }
869 this.lastPingSent = SystemClock.elapsedRealtime();
870 }
871
872 public void setOnMessagePacketReceivedListener(
873 final OnMessagePacketReceived listener) {
874 this.messageListener = listener;
875 }
876
877 public void setOnUnregisteredIqPacketReceivedListener(
878 final OnIqPacketReceived listener) {
879 this.unregisteredIqListener = listener;
880 }
881
882 public void setOnPresencePacketReceivedListener(
883 final OnPresencePacketReceived listener) {
884 this.presenceListener = listener;
885 }
886
887 public void setOnJinglePacketReceivedListener(
888 final OnJinglePacketReceived listener) {
889 this.jingleListener = listener;
890 }
891
892 public void setOnStatusChangedListener(final OnStatusChanged listener) {
893 this.statusListener = listener;
894 }
895
896 public void setOnBindListener(final OnBindListener listener) {
897 this.bindListener = listener;
898 }
899
900 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
901 this.acknowledgedListener = listener;
902 }
903
904 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
905 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
906 this.advancedStreamFeaturesLoadedListeners.add(listener);
907 }
908 }
909
910 public void disconnect(final boolean force) {
911 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
912 try {
913 if (force) {
914 socket.close();
915 return;
916 }
917 new Thread(new Runnable() {
918
919 @Override
920 public void run() {
921 if (tagWriter.isActive()) {
922 tagWriter.finish();
923 try {
924 while (!tagWriter.finished()) {
925 Log.d(Config.LOGTAG, "not yet finished");
926 Thread.sleep(100);
927 }
928 tagWriter.writeTag(Tag.end("stream:stream"));
929 socket.close();
930 } catch (final IOException e) {
931 Log.d(Config.LOGTAG,
932 "io exception during disconnect");
933 } catch (final InterruptedException e) {
934 Log.d(Config.LOGTAG, "interrupted");
935 }
936 }
937 }
938 }).start();
939 } catch (final IOException e) {
940 Log.d(Config.LOGTAG, "io exception during disconnect");
941 }
942 }
943
944 public List<String> findDiscoItemsByFeature(final String feature) {
945 final List<String> items = new ArrayList<>();
946 for (final Entry<String, List<String>> cursor : disco.entrySet()) {
947 if (cursor.getValue().contains(feature)) {
948 items.add(cursor.getKey());
949 }
950 }
951 return items;
952 }
953
954 public String findDiscoItemByFeature(final String feature) {
955 final List<String> items = findDiscoItemsByFeature(feature);
956 if (items.size() >= 1) {
957 return items.get(0);
958 }
959 return null;
960 }
961
962 public void r() {
963 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
964 }
965
966 public String getMucServer() {
967 for (final Entry<String, List<String>> cursor : disco.entrySet()) {
968 final List<String> value = cursor.getValue();
969 if (value.contains("http://jabber.org/protocol/muc") && !value.contains("jabber:iq:gateway") && !value.contains("siacs:no:muc")) {
970 return cursor.getKey();
971 }
972 }
973 return null;
974 }
975
976 public int getTimeToNextAttempt() {
977 final int interval = (int) (25 * Math.pow(1.5, attempt));
978 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
979 return interval - secondsSinceLast;
980 }
981
982 public int getAttempt() {
983 return this.attempt;
984 }
985
986 public Features getFeatures() {
987 return this.features;
988 }
989
990 public long getLastSessionEstablished() {
991 final long diff;
992 if (this.lastSessionStarted == 0) {
993 diff = SystemClock.elapsedRealtime() - this.lastConnect;
994 } else {
995 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
996 }
997 return System.currentTimeMillis() - diff;
998 }
999
1000 public long getLastConnect() {
1001 return this.lastConnect;
1002 }
1003
1004 public long getLastPingSent() {
1005 return this.lastPingSent;
1006 }
1007
1008 public long getLastPacketReceived() {
1009 return this.lastPaketReceived;
1010 }
1011
1012 public void sendActive() {
1013 this.sendPacket(new ActivePacket());
1014 }
1015
1016 public void sendInactive() {
1017 this.sendPacket(new InactivePacket());
1018 }
1019
1020 public class Features {
1021 XmppConnection connection;
1022
1023 public Features(final XmppConnection connection) {
1024 this.connection = connection;
1025 }
1026
1027 private boolean hasDiscoFeature(final Jid server, final String feature) {
1028 return connection.disco.containsKey(server.toDomainJid().toString()) &&
1029 connection.disco.get(server.toDomainJid().toString()).contains(feature);
1030 }
1031
1032 public boolean carbons() {
1033 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1034 }
1035
1036 public boolean blocking() {
1037 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1038 }
1039
1040 public boolean register() {
1041 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1042 }
1043
1044 public boolean sm() {
1045 return streamId != null;
1046 }
1047
1048 public boolean csi() {
1049 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1050 }
1051
1052 public boolean pubsub() {
1053 return hasDiscoFeature(account.getServer(),
1054 "http://jabber.org/protocol/pubsub#publish");
1055 }
1056
1057 public boolean mam() {
1058 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1059 }
1060
1061 public boolean advancedStreamFeaturesLoaded() {
1062 return disco.containsKey(account.getServer().toString());
1063 }
1064
1065 public boolean rosterVersioning() {
1066 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1067 }
1068
1069 public boolean streamhost() {
1070 return connection
1071 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1072 }
1073 }
1074
1075 private IqGenerator getIqGenerator() {
1076 return mXmppConnectionService.getIqGenerator();
1077 }
1078}