1package eu.siacs.conversations.xmpp.jingle;
2
3import android.os.SystemClock;
4import android.util.Log;
5
6import com.google.common.base.Optional;
7import com.google.common.base.Preconditions;
8import com.google.common.base.Strings;
9import com.google.common.base.Throwables;
10import com.google.common.collect.Collections2;
11import com.google.common.collect.ImmutableList;
12import com.google.common.collect.ImmutableMap;
13import com.google.common.collect.Sets;
14import com.google.common.primitives.Ints;
15import com.google.common.util.concurrent.ListenableFuture;
16
17import org.webrtc.EglBase;
18import org.webrtc.IceCandidate;
19import org.webrtc.PeerConnection;
20import org.webrtc.VideoTrack;
21
22import java.util.ArrayDeque;
23import java.util.Arrays;
24import java.util.Collection;
25import java.util.Collections;
26import java.util.List;
27import java.util.Map;
28import java.util.Set;
29import java.util.concurrent.ScheduledFuture;
30import java.util.concurrent.TimeUnit;
31
32import eu.siacs.conversations.Config;
33import eu.siacs.conversations.entities.Account;
34import eu.siacs.conversations.entities.Conversation;
35import eu.siacs.conversations.entities.Conversational;
36import eu.siacs.conversations.entities.Message;
37import eu.siacs.conversations.entities.RtpSessionStatus;
38import eu.siacs.conversations.services.AppRTCAudioManager;
39import eu.siacs.conversations.utils.IP;
40import eu.siacs.conversations.xml.Element;
41import eu.siacs.conversations.xml.Namespace;
42import eu.siacs.conversations.xmpp.Jid;
43import eu.siacs.conversations.xmpp.jingle.stanzas.Group;
44import eu.siacs.conversations.xmpp.jingle.stanzas.IceUdpTransportInfo;
45import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
46import eu.siacs.conversations.xmpp.jingle.stanzas.Propose;
47import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
48import eu.siacs.conversations.xmpp.jingle.stanzas.RtpDescription;
49import eu.siacs.conversations.xmpp.stanzas.IqPacket;
50import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
51
52public class JingleRtpConnection extends AbstractJingleConnection implements WebRTCWrapper.EventCallback {
53
54 public static final List<State> STATES_SHOWING_ONGOING_CALL = Arrays.asList(
55 State.PROCEED,
56 State.SESSION_INITIALIZED_PRE_APPROVED,
57 State.SESSION_ACCEPTED
58 );
59 private static final long BUSY_TIME_OUT = 30;
60 private static final List<State> TERMINATED = Arrays.asList(
61 State.ACCEPTED,
62 State.REJECTED,
63 State.RETRACTED,
64 State.RETRACTED_RACED,
65 State.TERMINATED_SUCCESS,
66 State.TERMINATED_DECLINED_OR_BUSY,
67 State.TERMINATED_CONNECTIVITY_ERROR,
68 State.TERMINATED_CANCEL_OR_TIMEOUT,
69 State.TERMINATED_APPLICATION_FAILURE
70 );
71
72 private static final Map<State, Collection<State>> VALID_TRANSITIONS;
73
74 static {
75 final ImmutableMap.Builder<State, Collection<State>> transitionBuilder = new ImmutableMap.Builder<>();
76 transitionBuilder.put(State.NULL, ImmutableList.of(
77 State.PROPOSED,
78 State.SESSION_INITIALIZED,
79 State.TERMINATED_APPLICATION_FAILURE
80 ));
81 transitionBuilder.put(State.PROPOSED, ImmutableList.of(
82 State.ACCEPTED,
83 State.PROCEED,
84 State.REJECTED,
85 State.RETRACTED,
86 State.TERMINATED_APPLICATION_FAILURE,
87 State.TERMINATED_CONNECTIVITY_ERROR //only used when the xmpp connection rebinds
88 ));
89 transitionBuilder.put(State.PROCEED, ImmutableList.of(
90 State.RETRACTED_RACED,
91 State.SESSION_INITIALIZED_PRE_APPROVED,
92 State.TERMINATED_SUCCESS,
93 State.TERMINATED_APPLICATION_FAILURE,
94 State.TERMINATED_CONNECTIVITY_ERROR //at this state used for error bounces of the proceed message
95 ));
96 transitionBuilder.put(State.SESSION_INITIALIZED, ImmutableList.of(
97 State.SESSION_ACCEPTED,
98 State.TERMINATED_SUCCESS,
99 State.TERMINATED_DECLINED_OR_BUSY,
100 State.TERMINATED_CONNECTIVITY_ERROR, //at this state used for IQ errors and IQ timeouts
101 State.TERMINATED_CANCEL_OR_TIMEOUT,
102 State.TERMINATED_APPLICATION_FAILURE
103 ));
104 transitionBuilder.put(State.SESSION_INITIALIZED_PRE_APPROVED, ImmutableList.of(
105 State.SESSION_ACCEPTED,
106 State.TERMINATED_SUCCESS,
107 State.TERMINATED_DECLINED_OR_BUSY,
108 State.TERMINATED_CONNECTIVITY_ERROR, //at this state used for IQ errors and IQ timeouts
109 State.TERMINATED_CANCEL_OR_TIMEOUT,
110 State.TERMINATED_APPLICATION_FAILURE
111 ));
112 transitionBuilder.put(State.SESSION_ACCEPTED, ImmutableList.of(
113 State.TERMINATED_SUCCESS,
114 State.TERMINATED_DECLINED_OR_BUSY,
115 State.TERMINATED_CONNECTIVITY_ERROR,
116 State.TERMINATED_CANCEL_OR_TIMEOUT,
117 State.TERMINATED_APPLICATION_FAILURE
118 ));
119 VALID_TRANSITIONS = transitionBuilder.build();
120 }
121
122 private final WebRTCWrapper webRTCWrapper = new WebRTCWrapper(this);
123 private final ArrayDeque<Set<Map.Entry<String, RtpContentMap.DescriptionTransport>>> pendingIceCandidates = new ArrayDeque<>();
124 private final Message message;
125 private State state = State.NULL;
126 private StateTransitionException stateTransitionException;
127 private Set<Media> proposedMedia;
128 private RtpContentMap initiatorRtpContentMap;
129 private RtpContentMap responderRtpContentMap;
130 private long rtpConnectionStarted = 0; //time of 'connected'
131 private long rtpConnectionEnded = 0;
132 private ScheduledFuture<?> ringingTimeoutFuture;
133
134 JingleRtpConnection(JingleConnectionManager jingleConnectionManager, Id id, Jid initiator) {
135 super(jingleConnectionManager, id, initiator);
136 final Conversation conversation = jingleConnectionManager.getXmppConnectionService().findOrCreateConversation(
137 id.account,
138 id.with.asBareJid(),
139 false,
140 false
141 );
142 this.message = new Message(
143 conversation,
144 isInitiator() ? Message.STATUS_SEND : Message.STATUS_RECEIVED,
145 Message.TYPE_RTP_SESSION,
146 id.sessionId
147 );
148 }
149
150 private static State reasonToState(Reason reason) {
151 switch (reason) {
152 case SUCCESS:
153 return State.TERMINATED_SUCCESS;
154 case DECLINE:
155 case BUSY:
156 return State.TERMINATED_DECLINED_OR_BUSY;
157 case CANCEL:
158 case TIMEOUT:
159 return State.TERMINATED_CANCEL_OR_TIMEOUT;
160 case FAILED_APPLICATION:
161 case SECURITY_ERROR:
162 case UNSUPPORTED_TRANSPORTS:
163 case UNSUPPORTED_APPLICATIONS:
164 return State.TERMINATED_APPLICATION_FAILURE;
165 default:
166 return State.TERMINATED_CONNECTIVITY_ERROR;
167 }
168 }
169
170 @Override
171 synchronized void deliverPacket(final JinglePacket jinglePacket) {
172 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": packet delivered to JingleRtpConnection");
173 switch (jinglePacket.getAction()) {
174 case SESSION_INITIATE:
175 receiveSessionInitiate(jinglePacket);
176 break;
177 case TRANSPORT_INFO:
178 receiveTransportInfo(jinglePacket);
179 break;
180 case SESSION_ACCEPT:
181 receiveSessionAccept(jinglePacket);
182 break;
183 case SESSION_TERMINATE:
184 receiveSessionTerminate(jinglePacket);
185 break;
186 default:
187 respondOk(jinglePacket);
188 Log.d(Config.LOGTAG, String.format("%s: received unhandled jingle action %s", id.account.getJid().asBareJid(), jinglePacket.getAction()));
189 break;
190 }
191 }
192
193 @Override
194 synchronized void notifyRebound() {
195 if (isTerminated()) {
196 return;
197 }
198 webRTCWrapper.close();
199 if (!isInitiator() && isInState(State.PROPOSED, State.SESSION_INITIALIZED)) {
200 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
201 }
202 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
203 //we might have already changed resources (full jid) at this point; so this might not even reach the other party
204 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
205 } else {
206 transitionOrThrow(State.TERMINATED_CONNECTIVITY_ERROR);
207 finish();
208 }
209 }
210
211 private void receiveSessionTerminate(final JinglePacket jinglePacket) {
212 respondOk(jinglePacket);
213 final JinglePacket.ReasonWrapper wrapper = jinglePacket.getReason();
214 final State previous = this.state;
215 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session terminate reason=" + wrapper.reason + "(" + Strings.nullToEmpty(wrapper.text) + ") while in state " + previous);
216 if (TERMINATED.contains(previous)) {
217 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring session terminate because already in " + previous);
218 return;
219 }
220 webRTCWrapper.close();
221 final State target = reasonToState(wrapper.reason);
222 transitionOrThrow(target);
223 writeLogMessage(target);
224 if (previous == State.PROPOSED || previous == State.SESSION_INITIALIZED) {
225 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
226 }
227 finish();
228 }
229
230 private void receiveTransportInfo(final JinglePacket jinglePacket) {
231 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
232 respondOk(jinglePacket);
233 final RtpContentMap contentMap;
234 try {
235 contentMap = RtpContentMap.of(jinglePacket);
236 } catch (IllegalArgumentException | NullPointerException e) {
237 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents; ignoring", e);
238 return;
239 }
240 final Set<Map.Entry<String, RtpContentMap.DescriptionTransport>> candidates = contentMap.contents.entrySet();
241 if (this.state == State.SESSION_ACCEPTED) {
242 try {
243 processCandidates(candidates);
244 } catch (final WebRTCWrapper.PeerConnectionNotInitialized e) {
245 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnection was not initialized when processing transport info. this usually indicates a race condition that can be ignored");
246 }
247 } else {
248 pendingIceCandidates.push(candidates);
249 }
250 } else {
251 if (isTerminated()) {
252 respondOk(jinglePacket);
253 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring out-of-order transport info; we where already terminated");
254 } else {
255 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received transport info while in state=" + this.state);
256 terminateWithOutOfOrder(jinglePacket);
257 }
258 }
259 }
260
261 private void processCandidates(final Set<Map.Entry<String, RtpContentMap.DescriptionTransport>> contents) {
262 final RtpContentMap rtpContentMap = isInitiator() ? this.responderRtpContentMap : this.initiatorRtpContentMap;
263 final Group originalGroup = rtpContentMap.group;
264 final List<String> identificationTags = originalGroup == null ? rtpContentMap.getNames() : originalGroup.getIdentificationTags();
265 if (identificationTags.size() == 0) {
266 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no identification tags found in initial offer. we won't be able to calculate mLineIndices");
267 }
268 processCandidates(identificationTags, contents);
269 }
270
271 private void processCandidates(final List<String> indices, final Set<Map.Entry<String, RtpContentMap.DescriptionTransport>> contents) {
272 for (final Map.Entry<String, RtpContentMap.DescriptionTransport> content : contents) {
273 final String ufrag = content.getValue().transport.getAttribute("ufrag");
274 for (final IceUdpTransportInfo.Candidate candidate : content.getValue().transport.getCandidates()) {
275 final String sdp;
276 try {
277 sdp = candidate.toSdpAttribute(ufrag);
278 } catch (IllegalArgumentException e) {
279 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring invalid ICE candidate " + e.getMessage());
280 continue;
281 }
282 final String sdpMid = content.getKey();
283 final int mLineIndex = indices.indexOf(sdpMid);
284 final IceCandidate iceCandidate = new IceCandidate(sdpMid, mLineIndex, sdp);
285 Log.d(Config.LOGTAG, "received candidate: " + iceCandidate);
286 this.webRTCWrapper.addIceCandidate(iceCandidate);
287 }
288 }
289 }
290
291 private void receiveSessionInitiate(final JinglePacket jinglePacket) {
292 if (isInitiator()) {
293 Log.d(Config.LOGTAG, String.format("%s: received session-initiate even though we were initiating", id.account.getJid().asBareJid()));
294 terminateWithOutOfOrder(jinglePacket);
295 return;
296 }
297 final RtpContentMap contentMap;
298 try {
299 contentMap = RtpContentMap.of(jinglePacket);
300 contentMap.requireContentDescriptions();
301 contentMap.requireDTLSFingerprint();
302 } catch (final RuntimeException e) {
303 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", Throwables.getRootCause(e));
304 respondOk(jinglePacket);
305 sendSessionTerminate(Reason.of(e), e.getMessage());
306 return;
307 }
308 Log.d(Config.LOGTAG, "processing session-init with " + contentMap.contents.size() + " contents");
309 final State target;
310 if (this.state == State.PROCEED) {
311 Preconditions.checkState(
312 proposedMedia != null && proposedMedia.size() > 0,
313 "proposed media must be set when processing pre-approved session-initiate"
314 );
315 if (!this.proposedMedia.equals(contentMap.getMedia())) {
316 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
317 "Your session proposal (Jingle Message Initiation) included media %s but your session-initiate was %s",
318 this.proposedMedia,
319 contentMap.getMedia()
320 ));
321 return;
322 }
323 target = State.SESSION_INITIALIZED_PRE_APPROVED;
324 } else {
325 target = State.SESSION_INITIALIZED;
326 }
327 if (transition(target, () -> this.initiatorRtpContentMap = contentMap)) {
328 respondOk(jinglePacket);
329 pendingIceCandidates.push(contentMap.contents.entrySet());
330 if (target == State.SESSION_INITIALIZED_PRE_APPROVED) {
331 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": automatically accepting session-initiate");
332 sendSessionAccept();
333 } else {
334 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received not pre-approved session-initiate. start ringing");
335 startRinging();
336 }
337 } else {
338 Log.d(Config.LOGTAG, String.format("%s: received session-initiate while in state %s", id.account.getJid().asBareJid(), state));
339 terminateWithOutOfOrder(jinglePacket);
340 }
341 }
342
343 private void receiveSessionAccept(final JinglePacket jinglePacket) {
344 if (!isInitiator()) {
345 Log.d(Config.LOGTAG, String.format("%s: received session-accept even though we were responding", id.account.getJid().asBareJid()));
346 terminateWithOutOfOrder(jinglePacket);
347 return;
348 }
349 final RtpContentMap contentMap;
350 try {
351 contentMap = RtpContentMap.of(jinglePacket);
352 contentMap.requireContentDescriptions();
353 contentMap.requireDTLSFingerprint();
354 } catch (final RuntimeException e) {
355 respondOk(jinglePacket);
356 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents in session-accept", e);
357 webRTCWrapper.close();
358 sendSessionTerminate(Reason.of(e), e.getMessage());
359 return;
360 }
361 final Set<Media> initiatorMedia = this.initiatorRtpContentMap.getMedia();
362 if (!initiatorMedia.equals(contentMap.getMedia())) {
363 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
364 "Your session-included included media %s but our session-initiate was %s",
365 this.proposedMedia,
366 contentMap.getMedia()
367 ));
368 return;
369 }
370 Log.d(Config.LOGTAG, "processing session-accept with " + contentMap.contents.size() + " contents");
371 if (transition(State.SESSION_ACCEPTED)) {
372 respondOk(jinglePacket);
373 receiveSessionAccept(contentMap);
374 } else {
375 Log.d(Config.LOGTAG, String.format("%s: received session-accept while in state %s", id.account.getJid().asBareJid(), state));
376 respondOk(jinglePacket);
377 }
378 }
379
380 private void receiveSessionAccept(final RtpContentMap contentMap) {
381 this.responderRtpContentMap = contentMap;
382 final SessionDescription sessionDescription;
383 try {
384 sessionDescription = SessionDescription.of(contentMap);
385 } catch (final IllegalArgumentException | NullPointerException e) {
386 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-accept to SDP", e);
387 webRTCWrapper.close();
388 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
389 return;
390 }
391 final org.webrtc.SessionDescription answer = new org.webrtc.SessionDescription(
392 org.webrtc.SessionDescription.Type.ANSWER,
393 sessionDescription.toString()
394 );
395 try {
396 this.webRTCWrapper.setRemoteDescription(answer).get();
397 } catch (final Exception e) {
398 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to set remote description after receiving session-accept", Throwables.getRootCause(e));
399 webRTCWrapper.close();
400 sendSessionTerminate(Reason.FAILED_APPLICATION);
401 return;
402 }
403 final List<String> identificationTags = contentMap.group == null ? contentMap.getNames() : contentMap.group.getIdentificationTags();
404 processCandidates(identificationTags, contentMap.contents.entrySet());
405 }
406
407 private void sendSessionAccept() {
408 final RtpContentMap rtpContentMap = this.initiatorRtpContentMap;
409 if (rtpContentMap == null) {
410 throw new IllegalStateException("initiator RTP Content Map has not been set");
411 }
412 final SessionDescription offer;
413 try {
414 offer = SessionDescription.of(rtpContentMap);
415 } catch (final IllegalArgumentException | NullPointerException e) {
416 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-initiate to SDP", e);
417 webRTCWrapper.close();
418 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
419 return;
420 }
421 sendSessionAccept(rtpContentMap.getMedia(), offer);
422 }
423
424 private void sendSessionAccept(final Set<Media> media, final SessionDescription offer) {
425 discoverIceServers(iceServers -> sendSessionAccept(media, offer, iceServers));
426 }
427
428 private synchronized void sendSessionAccept(final Set<Media> media, final SessionDescription offer, final List<PeerConnection.IceServer> iceServers) {
429 if (isTerminated()) {
430 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
431 return;
432 }
433 try {
434 setupWebRTC(media, iceServers);
435 } catch (final WebRTCWrapper.InitializationException e) {
436 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to initialize WebRTC");
437 webRTCWrapper.close();
438 sendSessionTerminate(Reason.FAILED_APPLICATION);
439 return;
440 }
441 final org.webrtc.SessionDescription sdp = new org.webrtc.SessionDescription(
442 org.webrtc.SessionDescription.Type.OFFER,
443 offer.toString()
444 );
445 try {
446 this.webRTCWrapper.setRemoteDescription(sdp).get();
447 addIceCandidatesFromBlackLog();
448 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createAnswer().get();
449 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
450 final RtpContentMap respondingRtpContentMap = RtpContentMap.of(sessionDescription);
451 sendSessionAccept(respondingRtpContentMap);
452 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get();
453 } catch (final Exception e) {
454 Log.d(Config.LOGTAG, "unable to send session accept", Throwables.getRootCause(e));
455 webRTCWrapper.close();
456 sendSessionTerminate(Reason.FAILED_APPLICATION);
457 }
458 }
459
460 private void addIceCandidatesFromBlackLog() {
461 while (!this.pendingIceCandidates.isEmpty()) {
462 processCandidates(this.pendingIceCandidates.poll());
463 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": added candidates from back log");
464 }
465 }
466
467 private void sendSessionAccept(final RtpContentMap rtpContentMap) {
468 this.responderRtpContentMap = rtpContentMap;
469 this.transitionOrThrow(State.SESSION_ACCEPTED);
470 final JinglePacket sessionAccept = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_ACCEPT, id.sessionId);
471 send(sessionAccept);
472 }
473
474 synchronized void deliveryMessage(final Jid from, final Element message, final String serverMessageId, final long timestamp) {
475 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": delivered message to JingleRtpConnection " + message);
476 switch (message.getName()) {
477 case "propose":
478 receivePropose(from, Propose.upgrade(message), serverMessageId, timestamp);
479 break;
480 case "proceed":
481 receiveProceed(from, serverMessageId, timestamp);
482 break;
483 case "retract":
484 receiveRetract(from, serverMessageId, timestamp);
485 break;
486 case "reject":
487 receiveReject(from, serverMessageId, timestamp);
488 break;
489 case "accept":
490 receiveAccept(from, serverMessageId, timestamp);
491 break;
492 default:
493 break;
494 }
495 }
496
497 void deliverFailedProceed() {
498 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": receive message error for proceed message");
499 if (transition(State.TERMINATED_CONNECTIVITY_ERROR)) {
500 webRTCWrapper.close();
501 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into connectivity error");
502 this.finish();
503 }
504 }
505
506 private void receiveAccept(final Jid from, final String serverMsgId, final long timestamp) {
507 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
508 if (originatedFromMyself) {
509 if (transition(State.ACCEPTED)) {
510 if (serverMsgId != null) {
511 this.message.setServerMsgId(serverMsgId);
512 }
513 this.message.setTime(timestamp);
514 this.message.setCarbon(true); //indicate that call was accepted on other device
515 this.writeLogMessageSuccess(0);
516 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
517 this.finish();
518 } else {
519 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to transition to accept because already in state=" + this.state);
520 }
521 } else {
522 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring 'accept' from " + from);
523 }
524 }
525
526 private void receiveReject(Jid from, String serverMsgId, long timestamp) {
527 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
528 //reject from another one of my clients
529 if (originatedFromMyself) {
530 if (transition(State.REJECTED)) {
531 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
532 this.finish();
533 if (serverMsgId != null) {
534 this.message.setServerMsgId(serverMsgId);
535 }
536 this.message.setTime(timestamp);
537 this.message.setCarbon(true); //indicate that call was rejected on other device
538 writeLogMessageMissed();
539 } else {
540 Log.d(Config.LOGTAG, "not able to transition into REJECTED because already in " + this.state);
541 }
542 } else {
543 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring reject from " + from + " for session with " + id.with);
544 }
545 }
546
547 private void receivePropose(final Jid from, final Propose propose, final String serverMsgId, final long timestamp) {
548 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
549 if (originatedFromMyself) {
550 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": saw proposal from mysql. ignoring");
551 } else if (transition(State.PROPOSED, () -> {
552 final Collection<RtpDescription> descriptions = Collections2.transform(
553 Collections2.filter(propose.getDescriptions(), d -> d instanceof RtpDescription),
554 input -> (RtpDescription) input
555 );
556 final Collection<Media> media = Collections2.transform(descriptions, RtpDescription::getMedia);
557 Preconditions.checkState(!media.contains(Media.UNKNOWN), "RTP descriptions contain unknown media");
558 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session proposal from " + from + " for " + media);
559 this.proposedMedia = Sets.newHashSet(media);
560 })) {
561 if (serverMsgId != null) {
562 this.message.setServerMsgId(serverMsgId);
563 }
564 this.message.setTime(timestamp);
565 startRinging();
566 } else {
567 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring session proposal because already in " + state);
568 }
569 }
570
571 private void startRinging() {
572 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received call from " + id.with + ". start ringing");
573 ringingTimeoutFuture = jingleConnectionManager.schedule(this::ringingTimeout, BUSY_TIME_OUT, TimeUnit.SECONDS);
574 xmppConnectionService.getNotificationService().showIncomingCallNotification(id, getMedia());
575 }
576
577 private synchronized void ringingTimeout() {
578 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": timeout reached for ringing");
579 switch (this.state) {
580 case PROPOSED:
581 message.markUnread();
582 rejectCallFromProposed();
583 break;
584 case SESSION_INITIALIZED:
585 message.markUnread();
586 rejectCallFromSessionInitiate();
587 break;
588 }
589 }
590
591 private void cancelRingingTimeout() {
592 final ScheduledFuture<?> future = this.ringingTimeoutFuture;
593 if (future != null && !future.isCancelled()) {
594 future.cancel(false);
595 }
596 }
597
598 private void receiveProceed(final Jid from, final String serverMsgId, final long timestamp) {
599 final Set<Media> media = Preconditions.checkNotNull(this.proposedMedia, "Proposed media has to be set before handling proceed");
600 Preconditions.checkState(media.size() > 0, "Proposed media should not be empty");
601 if (from.equals(id.with)) {
602 if (isInitiator()) {
603 if (transition(State.PROCEED)) {
604 if (serverMsgId != null) {
605 this.message.setServerMsgId(serverMsgId);
606 }
607 this.message.setTime(timestamp);
608 this.sendSessionInitiate(media, State.SESSION_INITIALIZED_PRE_APPROVED);
609 } else {
610 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because already in %s", id.account.getJid().asBareJid(), this.state));
611 }
612 } else {
613 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because we were not initializing", id.account.getJid().asBareJid()));
614 }
615 } else if (from.asBareJid().equals(id.account.getJid().asBareJid())) {
616 if (transition(State.ACCEPTED)) {
617 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": moved session with " + id.with + " into state accepted after received carbon copied procced");
618 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
619 this.finish();
620 }
621 } else {
622 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed from %s. was expected from %s", id.account.getJid().asBareJid(), from, id.with));
623 }
624 }
625
626 private void receiveRetract(final Jid from, final String serverMsgId, final long timestamp) {
627 if (from.equals(id.with)) {
628 final State target = this.state == State.PROCEED ? State.RETRACTED_RACED : State.RETRACTED;
629 if (transition(target)) {
630 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
631 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": session with " + id.with + " has been retracted (serverMsgId=" + serverMsgId + ")");
632 if (serverMsgId != null) {
633 this.message.setServerMsgId(serverMsgId);
634 }
635 this.message.setTime(timestamp);
636 if (target == State.RETRACTED) {
637 this.message.markUnread();
638 }
639 writeLogMessageMissed();
640 finish();
641 } else {
642 Log.d(Config.LOGTAG, "ignoring retract because already in " + this.state);
643 }
644 } else {
645 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received retract from " + from + ". expected retract from" + id.with + ". ignoring");
646 }
647 }
648
649 public void sendSessionInitiate() {
650 sendSessionInitiate(this.proposedMedia, State.SESSION_INITIALIZED);
651 }
652
653 private void sendSessionInitiate(final Set<Media> media, final State targetState) {
654 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": prepare session-initiate");
655 discoverIceServers(iceServers -> sendSessionInitiate(media, targetState, iceServers));
656 }
657
658 private synchronized void sendSessionInitiate(final Set<Media> media, final State targetState, final List<PeerConnection.IceServer> iceServers) {
659 if (isTerminated()) {
660 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
661 return;
662 }
663 try {
664 setupWebRTC(media, iceServers);
665 } catch (final WebRTCWrapper.InitializationException e) {
666 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to initialize WebRTC");
667 webRTCWrapper.close();
668 sendJingleMessage("retract", id.with.asBareJid());
669 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
670 this.finish();
671 return;
672 }
673 try {
674 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createOffer().get();
675 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
676 final RtpContentMap rtpContentMap = RtpContentMap.of(sessionDescription);
677 sendSessionInitiate(rtpContentMap, targetState);
678 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get();
679 } catch (final Exception e) {
680 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to sendSessionInitiate", Throwables.getRootCause(e));
681 webRTCWrapper.close();
682 if (isInState(targetState)) {
683 sendSessionTerminate(Reason.FAILED_APPLICATION);
684 } else {
685 sendJingleMessage("retract", id.with.asBareJid());
686 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
687 this.finish();
688 }
689 }
690 }
691
692 private void sendSessionInitiate(RtpContentMap rtpContentMap, final State targetState) {
693 this.initiatorRtpContentMap = rtpContentMap;
694 this.transitionOrThrow(targetState);
695 final JinglePacket sessionInitiate = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_INITIATE, id.sessionId);
696 send(sessionInitiate);
697 }
698
699 private void sendSessionTerminate(final Reason reason) {
700 sendSessionTerminate(reason, null);
701 }
702
703 private void sendSessionTerminate(final Reason reason, final String text) {
704 final State previous = this.state;
705 final State target = reasonToState(reason);
706 transitionOrThrow(target);
707 if (previous != State.NULL) {
708 writeLogMessage(target);
709 }
710 final JinglePacket jinglePacket = new JinglePacket(JinglePacket.Action.SESSION_TERMINATE, id.sessionId);
711 jinglePacket.setReason(reason, text);
712 Log.d(Config.LOGTAG, jinglePacket.toString());
713 send(jinglePacket);
714 finish();
715 }
716
717 private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) {
718 final RtpContentMap transportInfo;
719 try {
720 final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap;
721 transportInfo = rtpContentMap.transportInfo(contentName, candidate);
722 } catch (final Exception e) {
723 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName);
724 return;
725 }
726 final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId);
727 send(jinglePacket);
728 }
729
730 private void send(final JinglePacket jinglePacket) {
731 jinglePacket.setTo(id.with);
732 xmppConnectionService.sendIqPacket(id.account, jinglePacket, this::handleIqResponse);
733 }
734
735 private synchronized void handleIqResponse(final Account account, final IqPacket response) {
736 if (response.getType() == IqPacket.TYPE.ERROR) {
737 final String errorCondition = response.getErrorCondition();
738 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ-error from " + response.getFrom() + " in RTP session. " + errorCondition);
739 if (isTerminated()) {
740 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
741 return;
742 }
743 this.webRTCWrapper.close();
744 final State target;
745 if (Arrays.asList(
746 "service-unavailable",
747 "recipient-unavailable",
748 "remote-server-not-found",
749 "remote-server-timeout"
750 ).contains(errorCondition)) {
751 target = State.TERMINATED_CONNECTIVITY_ERROR;
752 } else {
753 target = State.TERMINATED_APPLICATION_FAILURE;
754 }
755 transitionOrThrow(target);
756 this.finish();
757 } else if (response.getType() == IqPacket.TYPE.TIMEOUT) {
758 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ timeout in RTP session with " + id.with + ". terminating with connectivity error");
759 if (isTerminated()) {
760 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
761 return;
762 }
763 this.webRTCWrapper.close();
764 transitionOrThrow(State.TERMINATED_CONNECTIVITY_ERROR);
765 this.finish();
766 }
767 }
768
769 private void terminateWithOutOfOrder(final JinglePacket jinglePacket) {
770 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": terminating session with out-of-order");
771 this.webRTCWrapper.close();
772 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
773 respondWithOutOfOrder(jinglePacket);
774 this.finish();
775 }
776
777 private void respondWithOutOfOrder(final JinglePacket jinglePacket) {
778 jingleConnectionManager.respondWithJingleError(id.account, jinglePacket, "out-of-order", "unexpected-request", "wait");
779 }
780
781 private void respondOk(final JinglePacket jinglePacket) {
782 xmppConnectionService.sendIqPacket(id.account, jinglePacket.generateResponse(IqPacket.TYPE.RESULT), null);
783 }
784
785 public void throwStateTransitionException() {
786 final StateTransitionException exception = this.stateTransitionException;
787 if (exception != null) {
788 throw new IllegalStateException(String.format("Transition to %s did not call finish", exception.state), exception);
789 }
790 }
791
792 public RtpEndUserState getEndUserState() {
793 switch (this.state) {
794 case NULL:
795 case PROPOSED:
796 case SESSION_INITIALIZED:
797 if (isInitiator()) {
798 return RtpEndUserState.RINGING;
799 } else {
800 return RtpEndUserState.INCOMING_CALL;
801 }
802 case PROCEED:
803 if (isInitiator()) {
804 return RtpEndUserState.RINGING;
805 } else {
806 return RtpEndUserState.ACCEPTING_CALL;
807 }
808 case SESSION_INITIALIZED_PRE_APPROVED:
809 if (isInitiator()) {
810 return RtpEndUserState.RINGING;
811 } else {
812 return RtpEndUserState.CONNECTING;
813 }
814 case SESSION_ACCEPTED:
815 final PeerConnection.PeerConnectionState state;
816 try {
817 state = webRTCWrapper.getState();
818 } catch (final WebRTCWrapper.PeerConnectionNotInitialized e) {
819 //We usually close the WebRTCWrapper *before* transitioning so we might still
820 //be in SESSION_ACCEPTED even though the peerConnection has been torn down
821 return RtpEndUserState.ENDING_CALL;
822 }
823 if (state == PeerConnection.PeerConnectionState.CONNECTED) {
824 return RtpEndUserState.CONNECTED;
825 } else if (state == PeerConnection.PeerConnectionState.NEW || state == PeerConnection.PeerConnectionState.CONNECTING) {
826 return RtpEndUserState.CONNECTING;
827 } else if (state == PeerConnection.PeerConnectionState.CLOSED) {
828 return RtpEndUserState.ENDING_CALL;
829 } else {
830 return rtpConnectionStarted == 0 ? RtpEndUserState.CONNECTIVITY_ERROR : RtpEndUserState.CONNECTIVITY_LOST_ERROR;
831 }
832 case REJECTED:
833 case TERMINATED_DECLINED_OR_BUSY:
834 if (isInitiator()) {
835 return RtpEndUserState.DECLINED_OR_BUSY;
836 } else {
837 return RtpEndUserState.ENDED;
838 }
839 case TERMINATED_SUCCESS:
840 case ACCEPTED:
841 case RETRACTED:
842 case TERMINATED_CANCEL_OR_TIMEOUT:
843 return RtpEndUserState.ENDED;
844 case RETRACTED_RACED:
845 return RtpEndUserState.RETRACTED;
846 case TERMINATED_CONNECTIVITY_ERROR:
847 return rtpConnectionStarted == 0 ? RtpEndUserState.CONNECTIVITY_ERROR : RtpEndUserState.CONNECTIVITY_LOST_ERROR;
848 case TERMINATED_APPLICATION_FAILURE:
849 return RtpEndUserState.APPLICATION_ERROR;
850 }
851 throw new IllegalStateException(String.format("%s has no equivalent EndUserState", this.state));
852 }
853
854 public Set<Media> getMedia() {
855 final State current = getState();
856 if (current == State.NULL) {
857 if (isInitiator()) {
858 return Preconditions.checkNotNull(
859 this.proposedMedia,
860 "RTP connection has not been initialized properly"
861 );
862 }
863 throw new IllegalStateException("RTP connection has not been initialized yet");
864 }
865 if (Arrays.asList(State.PROPOSED, State.PROCEED).contains(current)) {
866 return Preconditions.checkNotNull(
867 this.proposedMedia,
868 "RTP connection has not been initialized properly"
869 );
870 }
871 final RtpContentMap initiatorContentMap = initiatorRtpContentMap;
872 if (initiatorContentMap != null) {
873 return initiatorContentMap.getMedia();
874 } else if (isTerminated()) {
875 return Collections.emptySet(); //we might fail before we ever got a chance to set media
876 } else {
877 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
878 }
879 }
880
881
882 public synchronized void acceptCall() {
883 switch (this.state) {
884 case PROPOSED:
885 cancelRingingTimeout();
886 acceptCallFromProposed();
887 break;
888 case SESSION_INITIALIZED:
889 cancelRingingTimeout();
890 acceptCallFromSessionInitialized();
891 break;
892 case ACCEPTED:
893 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": the call has already been accepted with another client. UI was just lagging behind");
894 break;
895 case PROCEED:
896 case SESSION_ACCEPTED:
897 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": the call has already been accepted. user probably double tapped the UI");
898 break;
899 default:
900 throw new IllegalStateException("Can not accept call from " + this.state);
901 }
902 }
903
904
905 public void notifyPhoneCall() {
906 Log.d(Config.LOGTAG, "a phone call has just been started. killing jingle rtp connections");
907 if (Arrays.asList(State.PROPOSED, State.SESSION_INITIALIZED).contains(this.state)) {
908 rejectCall();
909 } else {
910 endCall();
911 }
912 }
913
914 public synchronized void rejectCall() {
915 if (isTerminated()) {
916 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": received rejectCall() when session has already been terminated. nothing to do");
917 return;
918 }
919 switch (this.state) {
920 case PROPOSED:
921 rejectCallFromProposed();
922 break;
923 case SESSION_INITIALIZED:
924 rejectCallFromSessionInitiate();
925 break;
926 default:
927 throw new IllegalStateException("Can not reject call from " + this.state);
928 }
929 }
930
931 public synchronized void endCall() {
932 if (isTerminated()) {
933 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": received endCall() when session has already been terminated. nothing to do");
934 return;
935 }
936 if (isInState(State.PROPOSED) && !isInitiator()) {
937 rejectCallFromProposed();
938 return;
939 }
940 if (isInState(State.PROCEED)) {
941 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ending call while in state PROCEED just means ending the connection");
942 this.webRTCWrapper.close();
943 transitionOrThrow(State.TERMINATED_SUCCESS); //arguably this wasn't success; but not a real failure either
944 this.finish();
945 return;
946 }
947 if (isInitiator() && isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED)) {
948 this.webRTCWrapper.close();
949 sendSessionTerminate(Reason.CANCEL);
950 return;
951 }
952 if (isInState(State.SESSION_INITIALIZED)) {
953 rejectCallFromSessionInitiate();
954 return;
955 }
956 if (isInState(State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
957 this.webRTCWrapper.close();
958 sendSessionTerminate(Reason.SUCCESS);
959 return;
960 }
961 if (isInState(State.TERMINATED_APPLICATION_FAILURE, State.TERMINATED_CONNECTIVITY_ERROR, State.TERMINATED_DECLINED_OR_BUSY)) {
962 Log.d(Config.LOGTAG, "ignoring request to end call because already in state " + this.state);
963 return;
964 }
965 throw new IllegalStateException("called 'endCall' while in state " + this.state + ". isInitiator=" + isInitiator());
966 }
967
968 private void setupWebRTC(final Set<Media> media, final List<PeerConnection.IceServer> iceServers) throws WebRTCWrapper.InitializationException {
969 this.jingleConnectionManager.ensureConnectionIsRegistered(this);
970 final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference;
971 if (media.contains(Media.VIDEO)) {
972 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.SPEAKER;
973 } else {
974 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.EARPIECE;
975 }
976 this.webRTCWrapper.setup(this.xmppConnectionService, speakerPhonePreference);
977 this.webRTCWrapper.initializePeerConnection(media, iceServers);
978 }
979
980 private void acceptCallFromProposed() {
981 transitionOrThrow(State.PROCEED);
982 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
983 this.sendJingleMessage("accept", id.account.getJid().asBareJid());
984 this.sendJingleMessage("proceed");
985 }
986
987 private void rejectCallFromProposed() {
988 transitionOrThrow(State.REJECTED);
989 writeLogMessageMissed();
990 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
991 this.sendJingleMessage("reject");
992 finish();
993 }
994
995 private void rejectCallFromSessionInitiate() {
996 webRTCWrapper.close();
997 sendSessionTerminate(Reason.DECLINE);
998 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
999 }
1000
1001 private void sendJingleMessage(final String action) {
1002 sendJingleMessage(action, id.with);
1003 }
1004
1005 private void sendJingleMessage(final String action, final Jid to) {
1006 final MessagePacket messagePacket = new MessagePacket();
1007 if ("proceed".equals(action)) {
1008 messagePacket.setId(JINGLE_MESSAGE_PROCEED_ID_PREFIX + id.sessionId);
1009 }
1010 messagePacket.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
1011 messagePacket.setTo(to);
1012 messagePacket.addChild(action, Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId);
1013 messagePacket.addChild("store", "urn:xmpp:hints");
1014 xmppConnectionService.sendMessagePacket(id.account, messagePacket);
1015 }
1016
1017 private void acceptCallFromSessionInitialized() {
1018 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
1019 sendSessionAccept();
1020 }
1021
1022 private synchronized boolean isInState(State... state) {
1023 return Arrays.asList(state).contains(this.state);
1024 }
1025
1026 private boolean transition(final State target) {
1027 return transition(target, null);
1028 }
1029
1030 private synchronized boolean transition(final State target, final Runnable runnable) {
1031 final Collection<State> validTransitions = VALID_TRANSITIONS.get(this.state);
1032 if (validTransitions != null && validTransitions.contains(target)) {
1033 this.state = target;
1034 this.stateTransitionException = new StateTransitionException(target);
1035 if (runnable != null) {
1036 runnable.run();
1037 }
1038 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target);
1039 updateEndUserState();
1040 updateOngoingCallNotification();
1041 return true;
1042 } else {
1043 return false;
1044 }
1045 }
1046
1047 void transitionOrThrow(final State target) {
1048 if (!transition(target)) {
1049 throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target));
1050 }
1051 }
1052
1053 @Override
1054 public void onIceCandidate(final IceCandidate iceCandidate) {
1055 final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp);
1056 Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString());
1057 sendTransportInfo(iceCandidate.sdpMid, candidate);
1058 }
1059
1060 @Override
1061 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
1062 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnectionState changed to " + newState);
1063 if (newState == PeerConnection.PeerConnectionState.CONNECTED && this.rtpConnectionStarted == 0) {
1064 this.rtpConnectionStarted = SystemClock.elapsedRealtime();
1065 }
1066 if (newState == PeerConnection.PeerConnectionState.CLOSED && this.rtpConnectionEnded == 0) {
1067 this.rtpConnectionEnded = SystemClock.elapsedRealtime();
1068 }
1069 //TODO 'DISCONNECTED' might be an opportunity to renew the offer and send a transport-replace
1070 //TODO exact syntax is yet to be determined but transport-replace sounds like the most reasonable
1071 //as there is no content-replace
1072 if (Arrays.asList(PeerConnection.PeerConnectionState.FAILED, PeerConnection.PeerConnectionState.DISCONNECTED).contains(newState)) {
1073 if (isTerminated()) {
1074 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": not sending session-terminate after connectivity error because session is already in state " + this.state);
1075 return;
1076 }
1077 new Thread(this::closeWebRTCSessionAfterFailedConnection).start();
1078 } else {
1079 updateEndUserState();
1080 }
1081 }
1082
1083 private void closeWebRTCSessionAfterFailedConnection() {
1084 this.webRTCWrapper.close();
1085 synchronized (this) {
1086 if (isTerminated()) {
1087 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": no need to send session-terminate after failed connection. Other party already did");
1088 return;
1089 }
1090 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
1091 }
1092 }
1093
1094 public long getRtpConnectionStarted() {
1095 return this.rtpConnectionStarted;
1096 }
1097
1098 public long getRtpConnectionEnded() {
1099 return this.rtpConnectionEnded;
1100 }
1101
1102 public AppRTCAudioManager getAudioManager() {
1103 return webRTCWrapper.getAudioManager();
1104 }
1105
1106 public boolean isMicrophoneEnabled() {
1107 return webRTCWrapper.isMicrophoneEnabled();
1108 }
1109
1110 public boolean setMicrophoneEnabled(final boolean enabled) {
1111 return webRTCWrapper.setMicrophoneEnabled(enabled);
1112 }
1113
1114 public boolean isVideoEnabled() {
1115 return webRTCWrapper.isVideoEnabled();
1116 }
1117
1118 public void setVideoEnabled(final boolean enabled) {
1119 webRTCWrapper.setVideoEnabled(enabled);
1120 }
1121
1122 public boolean isCameraSwitchable() {
1123 return webRTCWrapper.isCameraSwitchable();
1124 }
1125
1126 public boolean isFrontCamera() {
1127 return webRTCWrapper.isFrontCamera();
1128 }
1129
1130 public ListenableFuture<Boolean> switchCamera() {
1131 return webRTCWrapper.switchCamera();
1132 }
1133
1134 @Override
1135 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
1136 xmppConnectionService.notifyJingleRtpConnectionUpdate(selectedAudioDevice, availableAudioDevices);
1137 }
1138
1139 private void updateEndUserState() {
1140 final RtpEndUserState endUserState = getEndUserState();
1141 jingleConnectionManager.toneManager.transition(isInitiator(), endUserState, getMedia());
1142 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, endUserState);
1143 }
1144
1145 private void updateOngoingCallNotification() {
1146 if (STATES_SHOWING_ONGOING_CALL.contains(this.state)) {
1147 xmppConnectionService.setOngoingCall(id, getMedia());
1148 } else {
1149 xmppConnectionService.removeOngoingCall();
1150 }
1151 }
1152
1153 private void discoverIceServers(final OnIceServersDiscovered onIceServersDiscovered) {
1154 if (id.account.getXmppConnection().getFeatures().externalServiceDiscovery()) {
1155 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1156 request.setTo(id.account.getDomain());
1157 request.addChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1158 xmppConnectionService.sendIqPacket(id.account, request, (account, response) -> {
1159 ImmutableList.Builder<PeerConnection.IceServer> listBuilder = new ImmutableList.Builder<>();
1160 if (response.getType() == IqPacket.TYPE.RESULT) {
1161 final Element services = response.findChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1162 final List<Element> children = services == null ? Collections.emptyList() : services.getChildren();
1163 for (final Element child : children) {
1164 if ("service".equals(child.getName())) {
1165 final String type = child.getAttribute("type");
1166 final String host = child.getAttribute("host");
1167 final String sport = child.getAttribute("port");
1168 final Integer port = sport == null ? null : Ints.tryParse(sport);
1169 final String transport = child.getAttribute("transport");
1170 final String username = child.getAttribute("username");
1171 final String password = child.getAttribute("password");
1172 if (Strings.isNullOrEmpty(host) || port == null) {
1173 continue;
1174 }
1175 if (port < 0 || port > 65535) {
1176 continue;
1177 }
1178 if (Arrays.asList("stun", "stuns", "turn", "turns").contains(type) && Arrays.asList("udp", "tcp").contains(transport)) {
1179 if (Arrays.asList("stuns", "turns").contains(type) && "udp".equals(transport)) {
1180 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping invalid combination of udp/tls in external services");
1181 continue;
1182 }
1183 final PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer
1184 .builder(String.format("%s:%s:%s?transport=%s", type, IP.wrapIPv6(host), port, transport));
1185 iceServerBuilder.setTlsCertPolicy(PeerConnection.TlsCertPolicy.TLS_CERT_POLICY_INSECURE_NO_CHECK);
1186 if (username != null && password != null) {
1187 iceServerBuilder.setUsername(username);
1188 iceServerBuilder.setPassword(password);
1189 } else if (Arrays.asList("turn", "turns").contains(type)) {
1190 //The WebRTC spec requires throwing an InvalidAccessError when username (from libwebrtc source coder)
1191 //https://chromium.googlesource.com/external/webrtc/+/master/pc/ice_server_parsing.cc
1192 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping " + type + "/" + transport + " without username and password");
1193 continue;
1194 }
1195 final PeerConnection.IceServer iceServer = iceServerBuilder.createIceServer();
1196 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": discovered ICE Server: " + iceServer);
1197 listBuilder.add(iceServer);
1198 }
1199 }
1200 }
1201 }
1202 final List<PeerConnection.IceServer> iceServers = listBuilder.build();
1203 if (iceServers.size() == 0) {
1204 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no ICE server found " + response);
1205 }
1206 onIceServersDiscovered.onIceServersDiscovered(iceServers);
1207 });
1208 } else {
1209 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": has no external service discovery");
1210 onIceServersDiscovered.onIceServersDiscovered(Collections.emptyList());
1211 }
1212 }
1213
1214 private void finish() {
1215 if (isTerminated()) {
1216 this.cancelRingingTimeout();
1217 this.webRTCWrapper.verifyClosed();
1218 this.jingleConnectionManager.setTerminalSessionState(id, getEndUserState(), getMedia());
1219 this.jingleConnectionManager.finishConnectionOrThrow(this);
1220 } else {
1221 throw new IllegalStateException(String.format("Unable to call finish from %s", this.state));
1222 }
1223 }
1224
1225 private void writeLogMessage(final State state) {
1226 final long started = this.rtpConnectionStarted;
1227 long duration = started <= 0 ? 0 : SystemClock.elapsedRealtime() - started;
1228 if (state == State.TERMINATED_SUCCESS || (state == State.TERMINATED_CONNECTIVITY_ERROR && duration > 0)) {
1229 writeLogMessageSuccess(duration);
1230 } else {
1231 writeLogMessageMissed();
1232 }
1233 }
1234
1235 private void writeLogMessageSuccess(final long duration) {
1236 this.message.setBody(new RtpSessionStatus(true, duration).toString());
1237 this.writeMessage();
1238 }
1239
1240 private void writeLogMessageMissed() {
1241 this.message.setBody(new RtpSessionStatus(false, 0).toString());
1242 this.writeMessage();
1243 }
1244
1245 private void writeMessage() {
1246 final Conversational conversational = message.getConversation();
1247 if (conversational instanceof Conversation) {
1248 ((Conversation) conversational).add(this.message);
1249 xmppConnectionService.createMessageAsync(message);
1250 xmppConnectionService.updateConversationUi();
1251 } else {
1252 throw new IllegalStateException("Somehow the conversation in a message was a stub");
1253 }
1254 }
1255
1256 public State getState() {
1257 return this.state;
1258 }
1259
1260 boolean isTerminated() {
1261 return TERMINATED.contains(this.state);
1262 }
1263
1264 public Optional<VideoTrack> getLocalVideoTrack() {
1265 return webRTCWrapper.getLocalVideoTrack();
1266 }
1267
1268 public Optional<VideoTrack> getRemoteVideoTrack() {
1269 return webRTCWrapper.getRemoteVideoTrack();
1270 }
1271
1272
1273 public EglBase.Context getEglBaseContext() {
1274 return webRTCWrapper.getEglBaseContext();
1275 }
1276
1277 void setProposedMedia(final Set<Media> media) {
1278 this.proposedMedia = media;
1279 }
1280
1281 public void fireStateUpdate() {
1282 final RtpEndUserState endUserState = getEndUserState();
1283 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, endUserState);
1284 }
1285
1286 private interface OnIceServersDiscovered {
1287 void onIceServersDiscovered(List<PeerConnection.IceServer> iceServers);
1288 }
1289
1290 private static class StateTransitionException extends Exception {
1291 private final State state;
1292
1293 private StateTransitionException(final State state) {
1294 this.state = state;
1295 }
1296 }
1297}