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.collect.Collections2;
10import com.google.common.collect.ImmutableList;
11import com.google.common.collect.ImmutableMap;
12import com.google.common.collect.Sets;
13import com.google.common.primitives.Ints;
14
15import org.webrtc.EglBase;
16import org.webrtc.IceCandidate;
17import org.webrtc.PeerConnection;
18import org.webrtc.VideoTrack;
19
20import java.util.ArrayDeque;
21import java.util.Arrays;
22import java.util.Collection;
23import java.util.Collections;
24import java.util.List;
25import java.util.Map;
26import java.util.Set;
27
28import eu.siacs.conversations.Config;
29import eu.siacs.conversations.entities.Account;
30import eu.siacs.conversations.entities.Conversation;
31import eu.siacs.conversations.entities.Conversational;
32import eu.siacs.conversations.entities.Message;
33import eu.siacs.conversations.entities.RtpSessionStatus;
34import eu.siacs.conversations.services.AppRTCAudioManager;
35import eu.siacs.conversations.xml.Element;
36import eu.siacs.conversations.xml.Namespace;
37import eu.siacs.conversations.xmpp.jingle.stanzas.Group;
38import eu.siacs.conversations.xmpp.jingle.stanzas.IceUdpTransportInfo;
39import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
40import eu.siacs.conversations.xmpp.jingle.stanzas.Propose;
41import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
42import eu.siacs.conversations.xmpp.jingle.stanzas.RtpDescription;
43import eu.siacs.conversations.xmpp.stanzas.IqPacket;
44import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
45import rocks.xmpp.addr.Jid;
46
47public class JingleRtpConnection extends AbstractJingleConnection implements WebRTCWrapper.EventCallback {
48
49 public static final List<State> STATES_SHOWING_ONGOING_CALL = Arrays.asList(
50 State.PROCEED,
51 State.SESSION_INITIALIZED,
52 State.SESSION_INITIALIZED_PRE_APPROVED,
53 State.SESSION_ACCEPTED
54 );
55
56 private static final List<State> TERMINATED = Arrays.asList(
57 State.TERMINATED_SUCCESS,
58 State.TERMINATED_DECLINED_OR_BUSY,
59 State.TERMINATED_CONNECTIVITY_ERROR,
60 State.TERMINATED_CANCEL_OR_TIMEOUT,
61 State.TERMINATED_APPLICATION_FAILURE
62 );
63
64 private static final Map<State, Collection<State>> VALID_TRANSITIONS;
65
66 static {
67 final ImmutableMap.Builder<State, Collection<State>> transitionBuilder = new ImmutableMap.Builder<>();
68 transitionBuilder.put(State.NULL, ImmutableList.of(
69 State.PROPOSED,
70 State.SESSION_INITIALIZED,
71 State.TERMINATED_APPLICATION_FAILURE
72 ));
73 transitionBuilder.put(State.PROPOSED, ImmutableList.of(
74 State.ACCEPTED,
75 State.PROCEED,
76 State.REJECTED,
77 State.RETRACTED,
78 State.TERMINATED_APPLICATION_FAILURE,
79 State.TERMINATED_CONNECTIVITY_ERROR //only used when the xmpp connection rebinds
80 ));
81 transitionBuilder.put(State.PROCEED, ImmutableList.of(
82 State.SESSION_INITIALIZED_PRE_APPROVED,
83 State.TERMINATED_SUCCESS,
84 State.TERMINATED_APPLICATION_FAILURE,
85 State.TERMINATED_CONNECTIVITY_ERROR //at this state used for error bounces of the proceed message
86 ));
87 transitionBuilder.put(State.SESSION_INITIALIZED, ImmutableList.of(
88 State.SESSION_ACCEPTED,
89 State.TERMINATED_SUCCESS,
90 State.TERMINATED_DECLINED_OR_BUSY,
91 State.TERMINATED_CONNECTIVITY_ERROR, //at this state used for IQ errors and IQ timeouts
92 State.TERMINATED_CANCEL_OR_TIMEOUT,
93 State.TERMINATED_APPLICATION_FAILURE
94 ));
95 transitionBuilder.put(State.SESSION_INITIALIZED_PRE_APPROVED, ImmutableList.of(
96 State.SESSION_ACCEPTED,
97 State.TERMINATED_SUCCESS,
98 State.TERMINATED_DECLINED_OR_BUSY,
99 State.TERMINATED_CONNECTIVITY_ERROR, //at this state used for IQ errors and IQ timeouts
100 State.TERMINATED_CANCEL_OR_TIMEOUT,
101 State.TERMINATED_APPLICATION_FAILURE
102 ));
103 transitionBuilder.put(State.SESSION_ACCEPTED, ImmutableList.of(
104 State.TERMINATED_SUCCESS,
105 State.TERMINATED_DECLINED_OR_BUSY,
106 State.TERMINATED_CONNECTIVITY_ERROR,
107 State.TERMINATED_CANCEL_OR_TIMEOUT,
108 State.TERMINATED_APPLICATION_FAILURE
109 ));
110 VALID_TRANSITIONS = transitionBuilder.build();
111 }
112
113 private final WebRTCWrapper webRTCWrapper = new WebRTCWrapper(this);
114 private final ArrayDeque<IceCandidate> pendingIceCandidates = new ArrayDeque<>();
115 private final Message message;
116 private State state = State.NULL;
117 private Set<Media> proposedMedia;
118 private RtpContentMap initiatorRtpContentMap;
119 private RtpContentMap responderRtpContentMap;
120 private long rtpConnectionStarted = 0; //time of 'connected'
121
122
123 JingleRtpConnection(JingleConnectionManager jingleConnectionManager, Id id, Jid initiator) {
124 super(jingleConnectionManager, id, initiator);
125 final Conversation conversation = jingleConnectionManager.getXmppConnectionService().findOrCreateConversation(
126 id.account,
127 id.with.asBareJid(),
128 false,
129 false
130 );
131 this.message = new Message(
132 conversation,
133 isInitiator() ? Message.STATUS_SEND : Message.STATUS_RECEIVED,
134 Message.TYPE_RTP_SESSION,
135 id.sessionId
136 );
137 }
138
139 private static State reasonToState(Reason reason) {
140 switch (reason) {
141 case SUCCESS:
142 return State.TERMINATED_SUCCESS;
143 case DECLINE:
144 case BUSY:
145 return State.TERMINATED_DECLINED_OR_BUSY;
146 case CANCEL:
147 case TIMEOUT:
148 return State.TERMINATED_CANCEL_OR_TIMEOUT;
149 case FAILED_APPLICATION:
150 case SECURITY_ERROR:
151 case UNSUPPORTED_TRANSPORTS:
152 case UNSUPPORTED_APPLICATIONS:
153 return State.TERMINATED_APPLICATION_FAILURE;
154 default:
155 return State.TERMINATED_CONNECTIVITY_ERROR;
156 }
157 }
158
159 @Override
160 synchronized void deliverPacket(final JinglePacket jinglePacket) {
161 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": packet delivered to JingleRtpConnection");
162 switch (jinglePacket.getAction()) {
163 case SESSION_INITIATE:
164 receiveSessionInitiate(jinglePacket);
165 break;
166 case TRANSPORT_INFO:
167 receiveTransportInfo(jinglePacket);
168 break;
169 case SESSION_ACCEPT:
170 receiveSessionAccept(jinglePacket);
171 break;
172 case SESSION_TERMINATE:
173 receiveSessionTerminate(jinglePacket);
174 break;
175 default:
176 respondOk(jinglePacket);
177 Log.d(Config.LOGTAG, String.format("%s: received unhandled jingle action %s", id.account.getJid().asBareJid(), jinglePacket.getAction()));
178 break;
179 }
180 }
181
182 @Override
183 synchronized void notifyRebound() {
184 if (TERMINATED.contains(this.state)) {
185 return;
186 }
187 webRTCWrapper.close();
188 if (!isInitiator() && isInState(State.PROPOSED, State.SESSION_INITIALIZED)) {
189 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
190 }
191 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
192 //we might have already changed resources (full jid) at this point; so this might not even reach the other party
193 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
194 } else {
195 transitionOrThrow(State.TERMINATED_CONNECTIVITY_ERROR);
196 finish();
197 }
198 }
199
200 private void receiveSessionTerminate(final JinglePacket jinglePacket) {
201 respondOk(jinglePacket);
202 final JinglePacket.ReasonWrapper wrapper = jinglePacket.getReason();
203 final State previous = this.state;
204 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session terminate reason=" + wrapper.reason + "(" + Strings.nullToEmpty(wrapper.text) + ") while in state " + previous);
205 if (TERMINATED.contains(previous)) {
206 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring session terminate because already in " + previous);
207 return;
208 }
209 webRTCWrapper.close();
210 final State target = reasonToState(wrapper.reason);
211 transitionOrThrow(target);
212 writeLogMessage(target);
213 if (previous == State.PROPOSED || previous == State.SESSION_INITIALIZED) {
214 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
215 }
216 finish();
217 }
218
219 private void receiveTransportInfo(final JinglePacket jinglePacket) {
220 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
221 respondOk(jinglePacket);
222 final RtpContentMap contentMap;
223 try {
224 contentMap = RtpContentMap.of(jinglePacket);
225 } catch (IllegalArgumentException | NullPointerException e) {
226 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents; ignoring", e);
227 return;
228 }
229 final RtpContentMap rtpContentMap = isInitiator() ? this.responderRtpContentMap : this.initiatorRtpContentMap;
230 final Group originalGroup = rtpContentMap != null ? rtpContentMap.group : null;
231 final List<String> identificationTags = originalGroup == null ? Collections.emptyList() : originalGroup.getIdentificationTags();
232 if (identificationTags.size() == 0) {
233 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no identification tags found in initial offer. we won't be able to calculate mLineIndices");
234 }
235 for (final Map.Entry<String, RtpContentMap.DescriptionTransport> content : contentMap.contents.entrySet()) {
236 final String ufrag = content.getValue().transport.getAttribute("ufrag");
237 for (final IceUdpTransportInfo.Candidate candidate : content.getValue().transport.getCandidates()) {
238 final String sdp;
239 try {
240 sdp = candidate.toSdpAttribute(ufrag);
241 } catch (IllegalArgumentException e) {
242 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring invalid ICE candidate " + e.getMessage());
243 continue;
244 }
245 final String sdpMid = content.getKey();
246 final int mLineIndex = identificationTags.indexOf(sdpMid);
247 final IceCandidate iceCandidate = new IceCandidate(sdpMid, mLineIndex, sdp);
248 if (isInState(State.SESSION_ACCEPTED)) {
249 Log.d(Config.LOGTAG, "received candidate: " + iceCandidate);
250 this.webRTCWrapper.addIceCandidate(iceCandidate);
251 } else {
252 this.pendingIceCandidates.offer(iceCandidate);
253 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": put ICE candidate on backlog");
254 }
255 }
256 }
257 } else {
258 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received transport info while in state=" + this.state);
259 terminateWithOutOfOrder(jinglePacket);
260 }
261 }
262
263 private void receiveSessionInitiate(final JinglePacket jinglePacket) {
264 if (isInitiator()) {
265 Log.d(Config.LOGTAG, String.format("%s: received session-initiate even though we were initiating", id.account.getJid().asBareJid()));
266 terminateWithOutOfOrder(jinglePacket);
267 return;
268 }
269 final RtpContentMap contentMap;
270 try {
271 contentMap = RtpContentMap.of(jinglePacket);
272 contentMap.requireContentDescriptions();
273 contentMap.requireDTLSFingerprint();
274 } catch (final IllegalArgumentException | IllegalStateException | NullPointerException e) {
275 respondOk(jinglePacket);
276 sendSessionTerminate(Reason.of(e), e.getMessage());
277 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
278 return;
279 }
280 Log.d(Config.LOGTAG, "processing session-init with " + contentMap.contents.size() + " contents");
281 final State target;
282 if (this.state == State.PROCEED) {
283 Preconditions.checkState(
284 proposedMedia != null && proposedMedia.size() > 0,
285 "proposed media must be set when processing pre-approved session-initiate"
286 );
287 if (!this.proposedMedia.equals(contentMap.getMedia())) {
288 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
289 "Your session proposal (Jingle Message Initiation) included media %s but your session-initiate was %s",
290 this.proposedMedia,
291 contentMap.getMedia()
292 ));
293 return;
294 }
295 target = State.SESSION_INITIALIZED_PRE_APPROVED;
296 } else {
297 target = State.SESSION_INITIALIZED;
298 }
299 if (transition(target, () -> this.initiatorRtpContentMap = contentMap)) {
300 respondOk(jinglePacket);
301 if (target == State.SESSION_INITIALIZED_PRE_APPROVED) {
302 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": automatically accepting session-initiate");
303 sendSessionAccept();
304 } else {
305 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received not pre-approved session-initiate. start ringing");
306 startRinging();
307 }
308 } else {
309 Log.d(Config.LOGTAG, String.format("%s: received session-initiate while in state %s", id.account.getJid().asBareJid(), state));
310 terminateWithOutOfOrder(jinglePacket);
311 }
312 }
313
314 private void receiveSessionAccept(final JinglePacket jinglePacket) {
315 if (!isInitiator()) {
316 Log.d(Config.LOGTAG, String.format("%s: received session-accept even though we were responding", id.account.getJid().asBareJid()));
317 terminateWithOutOfOrder(jinglePacket);
318 return;
319 }
320 final RtpContentMap contentMap;
321 try {
322 contentMap = RtpContentMap.of(jinglePacket);
323 contentMap.requireContentDescriptions();
324 contentMap.requireDTLSFingerprint();
325 } catch (final IllegalArgumentException | IllegalStateException | NullPointerException e) {
326 respondOk(jinglePacket);
327 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents in session-accept", e);
328 webRTCWrapper.close();
329 sendSessionTerminate(Reason.of(e), e.getMessage());
330 return;
331 }
332 final Set<Media> initiatorMedia = this.initiatorRtpContentMap.getMedia();
333 if (!initiatorMedia.equals(contentMap.getMedia())) {
334 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
335 "Your session-included included media %s but our session-initiate was %s",
336 this.proposedMedia,
337 contentMap.getMedia()
338 ));
339 return;
340 }
341 Log.d(Config.LOGTAG, "processing session-accept with " + contentMap.contents.size() + " contents");
342 if (transition(State.SESSION_ACCEPTED)) {
343 respondOk(jinglePacket);
344 receiveSessionAccept(contentMap);
345 } else {
346 Log.d(Config.LOGTAG, String.format("%s: received session-accept while in state %s", id.account.getJid().asBareJid(), state));
347 respondOk(jinglePacket);
348 }
349 }
350
351 private void receiveSessionAccept(final RtpContentMap contentMap) {
352 this.responderRtpContentMap = contentMap;
353 final SessionDescription sessionDescription;
354 try {
355 sessionDescription = SessionDescription.of(contentMap);
356 } catch (final IllegalArgumentException | NullPointerException e) {
357 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-accept to SDP", e);
358 webRTCWrapper.close();
359 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
360 return;
361 }
362 org.webrtc.SessionDescription answer = new org.webrtc.SessionDescription(
363 org.webrtc.SessionDescription.Type.ANSWER,
364 sessionDescription.toString()
365 );
366 try {
367 this.webRTCWrapper.setRemoteDescription(answer).get();
368 } catch (Exception e) {
369 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to set remote description after receiving session-accept", e);
370 webRTCWrapper.close();
371 sendSessionTerminate(Reason.FAILED_APPLICATION);
372 }
373 }
374
375 private void sendSessionAccept() {
376 final RtpContentMap rtpContentMap = this.initiatorRtpContentMap;
377 if (rtpContentMap == null) {
378 throw new IllegalStateException("initiator RTP Content Map has not been set");
379 }
380 final SessionDescription offer;
381 try {
382 offer = SessionDescription.of(rtpContentMap);
383 } catch (final IllegalArgumentException | NullPointerException e) {
384 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-initiate to SDP", e);
385 webRTCWrapper.close();
386 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
387 return;
388 }
389 sendSessionAccept(rtpContentMap.getMedia(), offer);
390 }
391
392 private void sendSessionAccept(final Set<Media> media, final SessionDescription offer) {
393 discoverIceServers(iceServers -> sendSessionAccept(media, offer, iceServers));
394 }
395
396 private synchronized void sendSessionAccept(final Set<Media> media, final SessionDescription offer, final List<PeerConnection.IceServer> iceServers) {
397 if (TERMINATED.contains(this.state)) {
398 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
399 return;
400 }
401 try {
402 setupWebRTC(media, iceServers);
403 } catch (WebRTCWrapper.InitializationException e) {
404 sendSessionTerminate(Reason.FAILED_APPLICATION);
405 return;
406 }
407 final org.webrtc.SessionDescription sdp = new org.webrtc.SessionDescription(
408 org.webrtc.SessionDescription.Type.OFFER,
409 offer.toString()
410 );
411 try {
412 this.webRTCWrapper.setRemoteDescription(sdp).get();
413 addIceCandidatesFromBlackLog();
414 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createAnswer().get();
415 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
416 final RtpContentMap respondingRtpContentMap = RtpContentMap.of(sessionDescription);
417 sendSessionAccept(respondingRtpContentMap);
418 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription);
419 } catch (Exception e) {
420 Log.d(Config.LOGTAG, "unable to send session accept", e);
421
422 }
423 }
424
425 private void addIceCandidatesFromBlackLog() {
426 while (!this.pendingIceCandidates.isEmpty()) {
427 final IceCandidate iceCandidate = this.pendingIceCandidates.poll();
428 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": added ICE candidate from back log " + iceCandidate);
429 this.webRTCWrapper.addIceCandidate(iceCandidate);
430 }
431 }
432
433 private void sendSessionAccept(final RtpContentMap rtpContentMap) {
434 this.responderRtpContentMap = rtpContentMap;
435 this.transitionOrThrow(State.SESSION_ACCEPTED);
436 final JinglePacket sessionAccept = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_ACCEPT, id.sessionId);
437 Log.d(Config.LOGTAG, sessionAccept.toString());
438 send(sessionAccept);
439 }
440
441 synchronized void deliveryMessage(final Jid from, final Element message, final String serverMessageId, final long timestamp) {
442 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": delivered message to JingleRtpConnection " + message);
443 switch (message.getName()) {
444 case "propose":
445 receivePropose(from, Propose.upgrade(message), serverMessageId, timestamp);
446 break;
447 case "proceed":
448 receiveProceed(from, serverMessageId, timestamp);
449 break;
450 case "retract":
451 receiveRetract(from, serverMessageId, timestamp);
452 break;
453 case "reject":
454 receiveReject(from, serverMessageId, timestamp);
455 break;
456 case "accept":
457 receiveAccept(from, serverMessageId, timestamp);
458 break;
459 default:
460 break;
461 }
462 }
463
464 void deliverFailedProceed() {
465 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": receive message error for proceed message");
466 if (transition(State.TERMINATED_CONNECTIVITY_ERROR)) {
467 webRTCWrapper.close();
468 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into connectivity error");
469 this.finish();
470 }
471 }
472
473 private void receiveAccept(final Jid from, final String serverMsgId, final long timestamp) {
474 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
475 if (originatedFromMyself) {
476 if (transition(State.ACCEPTED)) {
477 if (serverMsgId != null) {
478 this.message.setServerMsgId(serverMsgId);
479 }
480 this.message.setTime(timestamp);
481 this.message.setCarbon(true); //indicate that call was accepted on other device
482 this.writeLogMessageSuccess(0);
483 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
484 this.finish();
485 } else {
486 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to transition to accept because already in state=" + this.state);
487 }
488 } else {
489 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring 'accept' from " + from);
490 }
491 }
492
493 private void receiveReject(Jid from, String serverMsgId, long timestamp) {
494 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
495 //reject from another one of my clients
496 if (originatedFromMyself) {
497 if (transition(State.REJECTED)) {
498 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
499 this.finish();
500 if (serverMsgId != null) {
501 this.message.setServerMsgId(serverMsgId);
502 }
503 this.message.setTime(timestamp);
504 this.message.setCarbon(true); //indicate that call was rejected on other device
505 writeLogMessageMissed();
506 } else {
507 Log.d(Config.LOGTAG, "not able to transition into REJECTED because already in " + this.state);
508 }
509 } else {
510 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring reject from " + from + " for session with " + id.with);
511 }
512 }
513
514 private void receivePropose(final Jid from, final Propose propose, final String serverMsgId, final long timestamp) {
515 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
516 if (originatedFromMyself) {
517 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": saw proposal from mysql. ignoring");
518 } else if (transition(State.PROPOSED, () -> {
519 final Collection<RtpDescription> descriptions = Collections2.transform(
520 Collections2.filter(propose.getDescriptions(), d -> d instanceof RtpDescription),
521 input -> (RtpDescription) input
522 );
523 final Collection<Media> media = Collections2.transform(descriptions, RtpDescription::getMedia);
524 Preconditions.checkState(!media.contains(Media.UNKNOWN), "RTP descriptions contain unknown media");
525 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session proposal from " + from + " for " + media);
526 this.proposedMedia = Sets.newHashSet(media);
527 })) {
528 if (serverMsgId != null) {
529 this.message.setServerMsgId(serverMsgId);
530 }
531 this.message.setTime(timestamp);
532 startRinging();
533 } else {
534 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring session proposal because already in " + state);
535 }
536 }
537
538 private void startRinging() {
539 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received call from " + id.with + ". start ringing");
540 xmppConnectionService.getNotificationService().showIncomingCallNotification(id, getMedia());
541 }
542
543 private void receiveProceed(final Jid from, final String serverMsgId, final long timestamp) {
544 final Set<Media> media = Preconditions.checkNotNull(this.proposedMedia, "Proposed media has to be set before handling proceed");
545 Preconditions.checkState(media.size() > 0, "Proposed media should not be empty");
546 if (from.equals(id.with)) {
547 if (isInitiator()) {
548 if (transition(State.PROCEED)) {
549 if (serverMsgId != null) {
550 this.message.setServerMsgId(serverMsgId);
551 }
552 this.message.setTime(timestamp);
553 this.sendSessionInitiate(media, State.SESSION_INITIALIZED_PRE_APPROVED);
554 } else {
555 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because already in %s", id.account.getJid().asBareJid(), this.state));
556 }
557 } else {
558 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because we were not initializing", id.account.getJid().asBareJid()));
559 }
560 } else if (from.asBareJid().equals(id.account.getJid().asBareJid())) {
561 if (transition(State.ACCEPTED)) {
562 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": moved session with " + id.with + " into state accepted after received carbon copied procced");
563 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
564 this.finish();
565 }
566 } else {
567 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed from %s. was expected from %s", id.account.getJid().asBareJid(), from, id.with));
568 }
569 }
570
571 private void receiveRetract(final Jid from, final String serverMsgId, final long timestamp) {
572 if (from.equals(id.with)) {
573 if (transition(State.RETRACTED)) {
574 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
575 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": session with " + id.with + " has been retracted (serverMsgId=" + serverMsgId + ")");
576 if (serverMsgId != null) {
577 this.message.setServerMsgId(serverMsgId);
578 }
579 this.message.setTime(timestamp);
580 writeLogMessageMissed();
581 finish();
582 } else {
583 Log.d(Config.LOGTAG, "ignoring retract because already in " + this.state);
584 }
585 } else {
586 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received retract from " + from + ". expected retract from" + id.with + ". ignoring");
587 }
588 }
589
590 private void sendSessionInitiate(final Set<Media> media, final State targetState) {
591 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": prepare session-initiate");
592 discoverIceServers(iceServers -> sendSessionInitiate(media, targetState, iceServers));
593 }
594
595 private synchronized void sendSessionInitiate(final Set<Media> media, final State targetState, final List<PeerConnection.IceServer> iceServers) {
596 if (TERMINATED.contains(this.state)) {
597 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
598 return;
599 }
600 try {
601 setupWebRTC(media, iceServers);
602 } catch (WebRTCWrapper.InitializationException e) {
603 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to initialize webrtc");
604 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
605 return;
606 }
607 try {
608 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createOffer().get();
609 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
610 Log.d(Config.LOGTAG, "description: " + webRTCSessionDescription.description);
611 final RtpContentMap rtpContentMap = RtpContentMap.of(sessionDescription);
612 sendSessionInitiate(rtpContentMap, targetState);
613 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get();
614 } catch (final Exception e) {
615 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to sendSessionInitiate", e);
616 webRTCWrapper.close();
617 if (isInState(targetState)) {
618 sendSessionTerminate(Reason.FAILED_APPLICATION);
619 } else {
620 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
621 }
622 }
623 }
624
625 private void sendSessionInitiate(RtpContentMap rtpContentMap, final State targetState) {
626 this.initiatorRtpContentMap = rtpContentMap;
627 this.transitionOrThrow(targetState);
628 final JinglePacket sessionInitiate = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_INITIATE, id.sessionId);
629 send(sessionInitiate);
630 }
631
632 private void sendSessionTerminate(final Reason reason) {
633 sendSessionTerminate(reason, null);
634 }
635
636 private void sendSessionTerminate(final Reason reason, final String text) {
637 final State target = reasonToState(reason);
638 transitionOrThrow(target);
639 writeLogMessage(target);
640 final JinglePacket jinglePacket = new JinglePacket(JinglePacket.Action.SESSION_TERMINATE, id.sessionId);
641 jinglePacket.setReason(reason, text);
642 Log.d(Config.LOGTAG, jinglePacket.toString());
643 send(jinglePacket);
644 finish();
645 }
646
647 private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) {
648 final RtpContentMap transportInfo;
649 try {
650 final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap;
651 transportInfo = rtpContentMap.transportInfo(contentName, candidate);
652 } catch (Exception e) {
653 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName);
654 return;
655 }
656 final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId);
657 send(jinglePacket);
658 }
659
660 private void send(final JinglePacket jinglePacket) {
661 jinglePacket.setTo(id.with);
662 xmppConnectionService.sendIqPacket(id.account, jinglePacket, this::handleIqResponse);
663 }
664
665 private synchronized void handleIqResponse(final Account account, final IqPacket response) {
666 if (response.getType() == IqPacket.TYPE.ERROR) {
667 final String errorCondition = response.getErrorCondition();
668 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ-error from " + response.getFrom() + " in RTP session. " + errorCondition);
669 if (TERMINATED.contains(this.state)) {
670 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
671 return;
672 }
673 this.webRTCWrapper.close();
674 final State target;
675 if (Arrays.asList(
676 "service-unavailable",
677 "recipient-unavailable",
678 "remote-server-not-found",
679 "remote-server-timeout"
680 ).contains(errorCondition)) {
681 target = State.TERMINATED_CONNECTIVITY_ERROR;
682 } else {
683 target = State.TERMINATED_APPLICATION_FAILURE;
684 }
685 if (transition(target)) {
686 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": terminated session with " + id.with);
687 } else {
688 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": not transitioning because already at state=" + this.state);
689 }
690 } else if (response.getType() == IqPacket.TYPE.TIMEOUT) {
691 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ timeout in RTP session with " + id.with + ". terminating with connectivity error");
692 if (TERMINATED.contains(this.state)) {
693 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
694 return;
695 }
696 this.webRTCWrapper.close();
697 transition(State.TERMINATED_CONNECTIVITY_ERROR);
698 this.finish();
699 }
700 }
701
702 private void terminateWithOutOfOrder(final JinglePacket jinglePacket) {
703 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": terminating session with out-of-order");
704 this.webRTCWrapper.close();
705 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
706 respondWithOutOfOrder(jinglePacket);
707 this.finish();
708 }
709
710 private void respondWithOutOfOrder(final JinglePacket jinglePacket) {
711 jingleConnectionManager.respondWithJingleError(id.account, jinglePacket, "out-of-order", "unexpected-request", "wait");
712 }
713
714 private void respondOk(final JinglePacket jinglePacket) {
715 xmppConnectionService.sendIqPacket(id.account, jinglePacket.generateResponse(IqPacket.TYPE.RESULT), null);
716 }
717
718 public RtpEndUserState getEndUserState() {
719 switch (this.state) {
720 case PROPOSED:
721 case SESSION_INITIALIZED:
722 if (isInitiator()) {
723 return RtpEndUserState.RINGING;
724 } else {
725 return RtpEndUserState.INCOMING_CALL;
726 }
727 case PROCEED:
728 if (isInitiator()) {
729 return RtpEndUserState.RINGING;
730 } else {
731 return RtpEndUserState.ACCEPTING_CALL;
732 }
733 case SESSION_INITIALIZED_PRE_APPROVED:
734 if (isInitiator()) {
735 return RtpEndUserState.RINGING;
736 } else {
737 return RtpEndUserState.CONNECTING;
738 }
739 case SESSION_ACCEPTED:
740 final PeerConnection.PeerConnectionState state = webRTCWrapper.getState();
741 if (state == PeerConnection.PeerConnectionState.CONNECTED) {
742 return RtpEndUserState.CONNECTED;
743 } else if (state == PeerConnection.PeerConnectionState.NEW || state == PeerConnection.PeerConnectionState.CONNECTING) {
744 return RtpEndUserState.CONNECTING;
745 } else if (state == PeerConnection.PeerConnectionState.CLOSED) {
746 return RtpEndUserState.ENDING_CALL;
747 } else {
748 return RtpEndUserState.CONNECTIVITY_ERROR;
749 }
750 case REJECTED:
751 case TERMINATED_DECLINED_OR_BUSY:
752 if (isInitiator()) {
753 return RtpEndUserState.DECLINED_OR_BUSY;
754 } else {
755 return RtpEndUserState.ENDED;
756 }
757 case TERMINATED_SUCCESS:
758 case ACCEPTED:
759 case RETRACTED:
760 case TERMINATED_CANCEL_OR_TIMEOUT:
761 return RtpEndUserState.ENDED;
762 case TERMINATED_CONNECTIVITY_ERROR:
763 return RtpEndUserState.CONNECTIVITY_ERROR;
764 case TERMINATED_APPLICATION_FAILURE:
765 return RtpEndUserState.APPLICATION_ERROR;
766 }
767 throw new IllegalStateException(String.format("%s has no equivalent EndUserState", this.state));
768 }
769
770 public Set<Media> getMedia() {
771 if (isInState(State.NULL)) {
772 throw new IllegalStateException("RTP connection has not been initialized yet");
773 }
774 if (isInState(State.PROPOSED, State.PROCEED)) {
775 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
776 }
777 final RtpContentMap initiatorContentMap = initiatorRtpContentMap;
778 if (initiatorContentMap != null) {
779 return initiatorContentMap.getMedia();
780 } else {
781 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
782 }
783 }
784
785
786 public synchronized void acceptCall() {
787 switch (this.state) {
788 case PROPOSED:
789 acceptCallFromProposed();
790 break;
791 case SESSION_INITIALIZED:
792 acceptCallFromSessionInitialized();
793 break;
794 default:
795 throw new IllegalStateException("Can not accept call from " + this.state);
796 }
797 }
798
799 public synchronized void rejectCall() {
800 switch (this.state) {
801 case PROPOSED:
802 rejectCallFromProposed();
803 break;
804 case SESSION_INITIALIZED:
805 rejectCallFromSessionInitiate();
806 break;
807 default:
808 throw new IllegalStateException("Can not reject call from " + this.state);
809 }
810 }
811
812 public synchronized void endCall() {
813 if (TERMINATED.contains(this.state)) {
814 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": received endCall() when session has already been terminated. nothing to do");
815 return;
816 }
817 if (isInState(State.PROPOSED) && !isInitiator()) {
818 rejectCallFromProposed();
819 return;
820 }
821 if (isInState(State.PROCEED)) {
822 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ending call while in state PROCEED just means ending the connection");
823 this.webRTCWrapper.close();
824 this.finish();
825 transitionOrThrow(State.TERMINATED_SUCCESS); //arguably this wasn't success; but not a real failure either
826 return;
827 }
828 if (isInitiator() && isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED)) {
829 this.webRTCWrapper.close();
830 sendSessionTerminate(Reason.CANCEL);
831 return;
832 }
833 if (isInState(State.SESSION_INITIALIZED)) {
834 rejectCallFromSessionInitiate();
835 return;
836 }
837 if (isInState(State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
838 this.webRTCWrapper.close();
839 sendSessionTerminate(Reason.SUCCESS);
840 return;
841 }
842 if (isInState(State.TERMINATED_APPLICATION_FAILURE, State.TERMINATED_CONNECTIVITY_ERROR, State.TERMINATED_DECLINED_OR_BUSY)) {
843 Log.d(Config.LOGTAG, "ignoring request to end call because already in state " + this.state);
844 return;
845 }
846 throw new IllegalStateException("called 'endCall' while in state " + this.state + ". isInitiator=" + isInitiator());
847 }
848
849 private void setupWebRTC(final Set<Media> media, final List<PeerConnection.IceServer> iceServers) throws WebRTCWrapper.InitializationException {
850 final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference;
851 if (media.contains(Media.VIDEO)) {
852 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.SPEAKER;
853 } else {
854 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.EARPIECE;
855 }
856 this.webRTCWrapper.setup(this.xmppConnectionService, speakerPhonePreference);
857 this.webRTCWrapper.initializePeerConnection(media, iceServers);
858 }
859
860 private void acceptCallFromProposed() {
861 transitionOrThrow(State.PROCEED);
862 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
863 this.sendJingleMessage("accept", id.account.getJid().asBareJid());
864 this.sendJingleMessage("proceed");
865 }
866
867 private void rejectCallFromProposed() {
868 transitionOrThrow(State.REJECTED);
869 writeLogMessageMissed();
870 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
871 this.sendJingleMessage("reject");
872 finish();
873 }
874
875 private void rejectCallFromSessionInitiate() {
876 webRTCWrapper.close();
877 sendSessionTerminate(Reason.DECLINE);
878 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
879 }
880
881 private void sendJingleMessage(final String action) {
882 sendJingleMessage(action, id.with);
883 }
884
885 private void sendJingleMessage(final String action, final Jid to) {
886 final MessagePacket messagePacket = new MessagePacket();
887 if ("proceed".equals(action)) {
888 messagePacket.setId(JINGLE_MESSAGE_PROCEED_ID_PREFIX + id.sessionId);
889 }
890 messagePacket.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
891 messagePacket.setTo(to);
892 messagePacket.addChild(action, Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId);
893 messagePacket.addChild("store", "urn:xmpp:hints");
894 xmppConnectionService.sendMessagePacket(id.account, messagePacket);
895 }
896
897 private void acceptCallFromSessionInitialized() {
898 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
899 sendSessionAccept();
900 }
901
902 private synchronized boolean isInState(State... state) {
903 return Arrays.asList(state).contains(this.state);
904 }
905
906 private boolean transition(final State target) {
907 return transition(target, null);
908 }
909
910 private synchronized boolean transition(final State target, final Runnable runnable) {
911 final Collection<State> validTransitions = VALID_TRANSITIONS.get(this.state);
912 if (validTransitions != null && validTransitions.contains(target)) {
913 this.state = target;
914 if (runnable != null) {
915 runnable.run();
916 }
917 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target);
918 updateEndUserState();
919 updateOngoingCallNotification();
920 return true;
921 } else {
922 return false;
923 }
924 }
925
926 public void transitionOrThrow(final State target) {
927 if (!transition(target)) {
928 throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target));
929 }
930 }
931
932 @Override
933 public void onIceCandidate(final IceCandidate iceCandidate) {
934 final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp);
935 Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString());
936 sendTransportInfo(iceCandidate.sdpMid, candidate);
937 }
938
939 @Override
940 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
941 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnectionState changed to " + newState);
942 if (newState == PeerConnection.PeerConnectionState.CONNECTED && this.rtpConnectionStarted == 0) {
943 this.rtpConnectionStarted = SystemClock.elapsedRealtime();
944 }
945 //TODO 'DISCONNECTED' might be an opportunity to renew the offer and send a transport-replace
946 //TODO exact syntax is yet to be determined but transport-replace sounds like the most reasonable
947 //as there is no content-replace
948 if (Arrays.asList(PeerConnection.PeerConnectionState.FAILED, PeerConnection.PeerConnectionState.DISCONNECTED).contains(newState)) {
949 if (TERMINATED.contains(this.state)) {
950 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": not sending session-terminate after connectivity error because session is already in state " + this.state);
951 return;
952 }
953 //we need to call close
954 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
955 } else {
956 updateEndUserState();
957 }
958 }
959
960 public AppRTCAudioManager getAudioManager() {
961 return webRTCWrapper.getAudioManager();
962 }
963
964 public boolean isMicrophoneEnabled() {
965 return webRTCWrapper.isMicrophoneEnabled();
966 }
967
968 public void setMicrophoneEnabled(final boolean enabled) {
969 webRTCWrapper.setMicrophoneEnabled(enabled);
970 }
971
972 public boolean isVideoEnabled() {
973 return webRTCWrapper.isVideoEnabled();
974 }
975
976 public void setVideoEnabled(final boolean enabled) {
977 webRTCWrapper.setVideoEnabled(enabled);
978 }
979
980 @Override
981 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
982 xmppConnectionService.notifyJingleRtpConnectionUpdate(selectedAudioDevice, availableAudioDevices);
983 }
984
985 private void updateEndUserState() {
986 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, getEndUserState());
987 }
988
989 private void updateOngoingCallNotification() {
990 if (STATES_SHOWING_ONGOING_CALL.contains(this.state)) {
991 xmppConnectionService.setOngoingCall(id, getMedia());
992 } else {
993 xmppConnectionService.removeOngoingCall();
994 }
995 }
996
997 private void discoverIceServers(final OnIceServersDiscovered onIceServersDiscovered) {
998 if (id.account.getXmppConnection().getFeatures().extendedServiceDiscovery()) {
999 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1000 request.setTo(Jid.of(id.account.getJid().getDomain()));
1001 request.addChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1002 xmppConnectionService.sendIqPacket(id.account, request, (account, response) -> {
1003 ImmutableList.Builder<PeerConnection.IceServer> listBuilder = new ImmutableList.Builder<>();
1004 if (response.getType() == IqPacket.TYPE.RESULT) {
1005 final Element services = response.findChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1006 final List<Element> children = services == null ? Collections.emptyList() : services.getChildren();
1007 for (final Element child : children) {
1008 if ("service".equals(child.getName())) {
1009 final String type = child.getAttribute("type");
1010 final String host = child.getAttribute("host");
1011 final String sport = child.getAttribute("port");
1012 final Integer port = sport == null ? null : Ints.tryParse(sport);
1013 final String transport = child.getAttribute("transport");
1014 final String username = child.getAttribute("username");
1015 final String password = child.getAttribute("password");
1016 if (Strings.isNullOrEmpty(host) || port == null) {
1017 continue;
1018 }
1019 if (port < 0 || port > 65535) {
1020 continue;
1021 }
1022 if (Arrays.asList("stun", "stuns", "turn", "turns").contains(type) && Arrays.asList("udp", "tcp").contains(transport)) {
1023 if (Arrays.asList("stuns", "turns").contains(type) && "udp".equals(transport)) {
1024 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping invalid combination of udp/tls in external services");
1025 continue;
1026 }
1027 //TODO wrap ipv6 addresses
1028 PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer.builder(String.format("%s:%s:%s?transport=%s", type, host, port, transport));
1029 if (username != null && password != null) {
1030 iceServerBuilder.setUsername(username);
1031 iceServerBuilder.setPassword(password);
1032 } else if (Arrays.asList("turn", "turns").contains(type)) {
1033 //The WebRTC spec requires throwing an InvalidAccessError when username (from libwebrtc source coder)
1034 //https://chromium.googlesource.com/external/webrtc/+/master/pc/ice_server_parsing.cc
1035 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping " + type + "/" + transport + " without username and password");
1036 continue;
1037 }
1038 final PeerConnection.IceServer iceServer = iceServerBuilder.createIceServer();
1039 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": discovered ICE Server: " + iceServer);
1040 listBuilder.add(iceServer);
1041 }
1042 }
1043 }
1044 }
1045 List<PeerConnection.IceServer> iceServers = listBuilder.build();
1046 if (iceServers.size() == 0) {
1047 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no ICE server found " + response);
1048 }
1049 onIceServersDiscovered.onIceServersDiscovered(iceServers);
1050 });
1051 } else {
1052 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": has no external service discovery");
1053 onIceServersDiscovered.onIceServersDiscovered(Collections.emptyList());
1054 }
1055 }
1056
1057 private void finish() {
1058 this.webRTCWrapper.verifyClosed();
1059 this.jingleConnectionManager.finishConnection(this);
1060 }
1061
1062 private void writeLogMessage(final State state) {
1063 final long started = this.rtpConnectionStarted;
1064 long duration = started <= 0 ? 0 : SystemClock.elapsedRealtime() - started;
1065 if (state == State.TERMINATED_SUCCESS || (state == State.TERMINATED_CONNECTIVITY_ERROR && duration > 0)) {
1066 writeLogMessageSuccess(duration);
1067 } else {
1068 writeLogMessageMissed();
1069 }
1070 }
1071
1072 private void writeLogMessageSuccess(final long duration) {
1073 this.message.setBody(new RtpSessionStatus(true, duration).toString());
1074 this.writeMessage();
1075 }
1076
1077 private void writeLogMessageMissed() {
1078 this.message.setBody(new RtpSessionStatus(false, 0).toString());
1079 this.writeMessage();
1080 }
1081
1082 private void writeMessage() {
1083 final Conversational conversational = message.getConversation();
1084 if (conversational instanceof Conversation) {
1085 ((Conversation) conversational).add(this.message);
1086 xmppConnectionService.databaseBackend.createMessage(message);
1087 xmppConnectionService.updateConversationUi();
1088 } else {
1089 throw new IllegalStateException("Somehow the conversation in a message was a stub");
1090 }
1091 }
1092
1093 public State getState() {
1094 return this.state;
1095 }
1096
1097 public Optional<VideoTrack> geLocalVideoTrack() {
1098 return webRTCWrapper.getLocalVideoTrack();
1099 }
1100
1101 public Optional<VideoTrack> getRemoteVideoTrack() {
1102 return webRTCWrapper.getRemoteVideoTrack();
1103 }
1104
1105
1106 public EglBase.Context getEglBaseContext() {
1107 return webRTCWrapper.getEglBaseContext();
1108 }
1109
1110 public void setProposedMedia(final Set<Media> media) {
1111 this.proposedMedia = media;
1112 }
1113
1114 private interface OnIceServersDiscovered {
1115 void onIceServersDiscovered(List<PeerConnection.IceServer> iceServers);
1116 }
1117}