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 JingleRtpConnection(JingleConnectionManager jingleConnectionManager, Id id, Jid initiator) {
123 super(jingleConnectionManager, id, initiator);
124 final Conversation conversation = jingleConnectionManager.getXmppConnectionService().findOrCreateConversation(
125 id.account,
126 id.with.asBareJid(),
127 false,
128 false
129 );
130 this.message = new Message(
131 conversation,
132 isInitiator() ? Message.STATUS_SEND : Message.STATUS_RECEIVED,
133 Message.TYPE_RTP_SESSION,
134 id.sessionId
135 );
136 }
137
138 private static State reasonToState(Reason reason) {
139 switch (reason) {
140 case SUCCESS:
141 return State.TERMINATED_SUCCESS;
142 case DECLINE:
143 case BUSY:
144 return State.TERMINATED_DECLINED_OR_BUSY;
145 case CANCEL:
146 case TIMEOUT:
147 return State.TERMINATED_CANCEL_OR_TIMEOUT;
148 case FAILED_APPLICATION:
149 case SECURITY_ERROR:
150 case UNSUPPORTED_TRANSPORTS:
151 case UNSUPPORTED_APPLICATIONS:
152 return State.TERMINATED_APPLICATION_FAILURE;
153 default:
154 return State.TERMINATED_CONNECTIVITY_ERROR;
155 }
156 }
157
158 @Override
159 synchronized void deliverPacket(final JinglePacket jinglePacket) {
160 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": packet delivered to JingleRtpConnection");
161 switch (jinglePacket.getAction()) {
162 case SESSION_INITIATE:
163 receiveSessionInitiate(jinglePacket);
164 break;
165 case TRANSPORT_INFO:
166 receiveTransportInfo(jinglePacket);
167 break;
168 case SESSION_ACCEPT:
169 receiveSessionAccept(jinglePacket);
170 break;
171 case SESSION_TERMINATE:
172 receiveSessionTerminate(jinglePacket);
173 break;
174 default:
175 respondOk(jinglePacket);
176 Log.d(Config.LOGTAG, String.format("%s: received unhandled jingle action %s", id.account.getJid().asBareJid(), jinglePacket.getAction()));
177 break;
178 }
179 }
180
181 @Override
182 synchronized void notifyRebound() {
183 if (TERMINATED.contains(this.state)) {
184 return;
185 }
186 webRTCWrapper.close();
187 if (!isInitiator() && isInState(State.PROPOSED, State.SESSION_INITIALIZED)) {
188 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
189 }
190 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
191 //we might have already changed resources (full jid) at this point; so this might not even reach the other party
192 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
193 } else {
194 transitionOrThrow(State.TERMINATED_CONNECTIVITY_ERROR);
195 finish();
196 }
197 }
198
199 private void receiveSessionTerminate(final JinglePacket jinglePacket) {
200 respondOk(jinglePacket);
201 final JinglePacket.ReasonWrapper wrapper = jinglePacket.getReason();
202 final State previous = this.state;
203 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session terminate reason=" + wrapper.reason + "(" + Strings.nullToEmpty(wrapper.text) + ") while in state " + previous);
204 if (TERMINATED.contains(previous)) {
205 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring session terminate because already in " + previous);
206 return;
207 }
208 webRTCWrapper.close();
209 final State target = reasonToState(wrapper.reason);
210 transitionOrThrow(target);
211 writeLogMessage(target);
212 if (previous == State.PROPOSED || previous == State.SESSION_INITIALIZED) {
213 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
214 }
215 finish();
216 }
217
218 private void receiveTransportInfo(final JinglePacket jinglePacket) {
219 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
220 respondOk(jinglePacket);
221 final RtpContentMap contentMap;
222 try {
223 contentMap = RtpContentMap.of(jinglePacket);
224 } catch (IllegalArgumentException | NullPointerException e) {
225 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents; ignoring", e);
226 return;
227 }
228 final RtpContentMap rtpContentMap = isInitiator() ? this.responderRtpContentMap : this.initiatorRtpContentMap;
229 final Group originalGroup = rtpContentMap != null ? rtpContentMap.group : null;
230 final List<String> identificationTags = originalGroup == null ? Collections.emptyList() : originalGroup.getIdentificationTags();
231 if (identificationTags.size() == 0) {
232 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no identification tags found in initial offer. we won't be able to calculate mLineIndices");
233 }
234 for (final Map.Entry<String, RtpContentMap.DescriptionTransport> content : contentMap.contents.entrySet()) {
235 final String ufrag = content.getValue().transport.getAttribute("ufrag");
236 for (final IceUdpTransportInfo.Candidate candidate : content.getValue().transport.getCandidates()) {
237 final String sdp;
238 try {
239 sdp = candidate.toSdpAttribute(ufrag);
240 } catch (IllegalArgumentException e) {
241 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring invalid ICE candidate " + e.getMessage());
242 continue;
243 }
244 final String sdpMid = content.getKey();
245 final int mLineIndex = identificationTags.indexOf(sdpMid);
246 final IceCandidate iceCandidate = new IceCandidate(sdpMid, mLineIndex, sdp);
247 if (isInState(State.SESSION_ACCEPTED)) {
248 Log.d(Config.LOGTAG, "received candidate: " + iceCandidate);
249 this.webRTCWrapper.addIceCandidate(iceCandidate);
250 } else {
251 this.pendingIceCandidates.offer(iceCandidate);
252 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": put ICE candidate on backlog");
253 }
254 }
255 }
256 } else {
257 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received transport info while in state=" + this.state);
258 terminateWithOutOfOrder(jinglePacket);
259 }
260 }
261
262 private void receiveSessionInitiate(final JinglePacket jinglePacket) {
263 if (isInitiator()) {
264 Log.d(Config.LOGTAG, String.format("%s: received session-initiate even though we were initiating", id.account.getJid().asBareJid()));
265 terminateWithOutOfOrder(jinglePacket);
266 return;
267 }
268 final RtpContentMap contentMap;
269 try {
270 contentMap = RtpContentMap.of(jinglePacket);
271 contentMap.requireContentDescriptions();
272 contentMap.requireDTLSFingerprint();
273 } catch (final RuntimeException e) {
274 respondOk(jinglePacket);
275 sendSessionTerminate(Reason.of(e), e.getMessage());
276 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
277 return;
278 }
279 Log.d(Config.LOGTAG, "processing session-init with " + contentMap.contents.size() + " contents");
280 final State target;
281 if (this.state == State.PROCEED) {
282 Preconditions.checkState(
283 proposedMedia != null && proposedMedia.size() > 0,
284 "proposed media must be set when processing pre-approved session-initiate"
285 );
286 if (!this.proposedMedia.equals(contentMap.getMedia())) {
287 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
288 "Your session proposal (Jingle Message Initiation) included media %s but your session-initiate was %s",
289 this.proposedMedia,
290 contentMap.getMedia()
291 ));
292 return;
293 }
294 target = State.SESSION_INITIALIZED_PRE_APPROVED;
295 } else {
296 target = State.SESSION_INITIALIZED;
297 }
298 if (transition(target, () -> this.initiatorRtpContentMap = contentMap)) {
299 respondOk(jinglePacket);
300 if (target == State.SESSION_INITIALIZED_PRE_APPROVED) {
301 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": automatically accepting session-initiate");
302 sendSessionAccept();
303 } else {
304 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received not pre-approved session-initiate. start ringing");
305 startRinging();
306 }
307 } else {
308 Log.d(Config.LOGTAG, String.format("%s: received session-initiate while in state %s", id.account.getJid().asBareJid(), state));
309 terminateWithOutOfOrder(jinglePacket);
310 }
311 }
312
313 private void receiveSessionAccept(final JinglePacket jinglePacket) {
314 if (!isInitiator()) {
315 Log.d(Config.LOGTAG, String.format("%s: received session-accept even though we were responding", id.account.getJid().asBareJid()));
316 terminateWithOutOfOrder(jinglePacket);
317 return;
318 }
319 final RtpContentMap contentMap;
320 try {
321 contentMap = RtpContentMap.of(jinglePacket);
322 contentMap.requireContentDescriptions();
323 contentMap.requireDTLSFingerprint();
324 } catch (final RuntimeException e) {
325 respondOk(jinglePacket);
326 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents in session-accept", e);
327 webRTCWrapper.close();
328 sendSessionTerminate(Reason.of(e), e.getMessage());
329 return;
330 }
331 final Set<Media> initiatorMedia = this.initiatorRtpContentMap.getMedia();
332 if (!initiatorMedia.equals(contentMap.getMedia())) {
333 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
334 "Your session-included included media %s but our session-initiate was %s",
335 this.proposedMedia,
336 contentMap.getMedia()
337 ));
338 return;
339 }
340 Log.d(Config.LOGTAG, "processing session-accept with " + contentMap.contents.size() + " contents");
341 if (transition(State.SESSION_ACCEPTED)) {
342 respondOk(jinglePacket);
343 receiveSessionAccept(contentMap);
344 } else {
345 Log.d(Config.LOGTAG, String.format("%s: received session-accept while in state %s", id.account.getJid().asBareJid(), state));
346 respondOk(jinglePacket);
347 }
348 }
349
350 private void receiveSessionAccept(final RtpContentMap contentMap) {
351 this.responderRtpContentMap = contentMap;
352 final SessionDescription sessionDescription;
353 try {
354 sessionDescription = SessionDescription.of(contentMap);
355 } catch (final IllegalArgumentException | NullPointerException e) {
356 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-accept to SDP", e);
357 webRTCWrapper.close();
358 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
359 return;
360 }
361 org.webrtc.SessionDescription answer = new org.webrtc.SessionDescription(
362 org.webrtc.SessionDescription.Type.ANSWER,
363 sessionDescription.toString()
364 );
365 try {
366 this.webRTCWrapper.setRemoteDescription(answer).get();
367 } catch (Exception e) {
368 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to set remote description after receiving session-accept", e);
369 webRTCWrapper.close();
370 sendSessionTerminate(Reason.FAILED_APPLICATION);
371 }
372 }
373
374 private void sendSessionAccept() {
375 final RtpContentMap rtpContentMap = this.initiatorRtpContentMap;
376 if (rtpContentMap == null) {
377 throw new IllegalStateException("initiator RTP Content Map has not been set");
378 }
379 final SessionDescription offer;
380 try {
381 offer = SessionDescription.of(rtpContentMap);
382 } catch (final IllegalArgumentException | NullPointerException e) {
383 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-initiate to SDP", e);
384 webRTCWrapper.close();
385 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
386 return;
387 }
388 sendSessionAccept(rtpContentMap.getMedia(), offer);
389 }
390
391 private void sendSessionAccept(final Set<Media> media, final SessionDescription offer) {
392 discoverIceServers(iceServers -> sendSessionAccept(media, offer, iceServers));
393 }
394
395 private synchronized void sendSessionAccept(final Set<Media> media, final SessionDescription offer, final List<PeerConnection.IceServer> iceServers) {
396 if (TERMINATED.contains(this.state)) {
397 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
398 return;
399 }
400 try {
401 setupWebRTC(media, iceServers);
402 } catch (WebRTCWrapper.InitializationException e) {
403 sendSessionTerminate(Reason.FAILED_APPLICATION);
404 return;
405 }
406 final org.webrtc.SessionDescription sdp = new org.webrtc.SessionDescription(
407 org.webrtc.SessionDescription.Type.OFFER,
408 offer.toString()
409 );
410 try {
411 this.webRTCWrapper.setRemoteDescription(sdp).get();
412 addIceCandidatesFromBlackLog();
413 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createAnswer().get();
414 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
415 final RtpContentMap respondingRtpContentMap = RtpContentMap.of(sessionDescription);
416 sendSessionAccept(respondingRtpContentMap);
417 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription);
418 } catch (Exception e) {
419 Log.d(Config.LOGTAG, "unable to send session accept", e);
420
421 }
422 }
423
424 private void addIceCandidatesFromBlackLog() {
425 while (!this.pendingIceCandidates.isEmpty()) {
426 final IceCandidate iceCandidate = this.pendingIceCandidates.poll();
427 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": added ICE candidate from back log " + iceCandidate);
428 this.webRTCWrapper.addIceCandidate(iceCandidate);
429 }
430 }
431
432 private void sendSessionAccept(final RtpContentMap rtpContentMap) {
433 this.responderRtpContentMap = rtpContentMap;
434 this.transitionOrThrow(State.SESSION_ACCEPTED);
435 final JinglePacket sessionAccept = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_ACCEPT, id.sessionId);
436 Log.d(Config.LOGTAG, sessionAccept.toString());
437 send(sessionAccept);
438 }
439
440 synchronized void deliveryMessage(final Jid from, final Element message, final String serverMessageId, final long timestamp) {
441 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": delivered message to JingleRtpConnection " + message);
442 switch (message.getName()) {
443 case "propose":
444 receivePropose(from, Propose.upgrade(message), serverMessageId, timestamp);
445 break;
446 case "proceed":
447 receiveProceed(from, serverMessageId, timestamp);
448 break;
449 case "retract":
450 receiveRetract(from, serverMessageId, timestamp);
451 break;
452 case "reject":
453 receiveReject(from, serverMessageId, timestamp);
454 break;
455 case "accept":
456 receiveAccept(from, serverMessageId, timestamp);
457 break;
458 default:
459 break;
460 }
461 }
462
463 void deliverFailedProceed() {
464 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": receive message error for proceed message");
465 if (transition(State.TERMINATED_CONNECTIVITY_ERROR)) {
466 webRTCWrapper.close();
467 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into connectivity error");
468 this.finish();
469 }
470 }
471
472 private void receiveAccept(final Jid from, final String serverMsgId, final long timestamp) {
473 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
474 if (originatedFromMyself) {
475 if (transition(State.ACCEPTED)) {
476 if (serverMsgId != null) {
477 this.message.setServerMsgId(serverMsgId);
478 }
479 this.message.setTime(timestamp);
480 this.message.setCarbon(true); //indicate that call was accepted on other device
481 this.writeLogMessageSuccess(0);
482 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
483 this.finish();
484 } else {
485 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to transition to accept because already in state=" + this.state);
486 }
487 } else {
488 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring 'accept' from " + from);
489 }
490 }
491
492 private void receiveReject(Jid from, String serverMsgId, long timestamp) {
493 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
494 //reject from another one of my clients
495 if (originatedFromMyself) {
496 if (transition(State.REJECTED)) {
497 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
498 this.finish();
499 if (serverMsgId != null) {
500 this.message.setServerMsgId(serverMsgId);
501 }
502 this.message.setTime(timestamp);
503 this.message.setCarbon(true); //indicate that call was rejected on other device
504 writeLogMessageMissed();
505 } else {
506 Log.d(Config.LOGTAG, "not able to transition into REJECTED because already in " + this.state);
507 }
508 } else {
509 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring reject from " + from + " for session with " + id.with);
510 }
511 }
512
513 private void receivePropose(final Jid from, final Propose propose, final String serverMsgId, final long timestamp) {
514 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
515 if (originatedFromMyself) {
516 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": saw proposal from mysql. ignoring");
517 } else if (transition(State.PROPOSED, () -> {
518 final Collection<RtpDescription> descriptions = Collections2.transform(
519 Collections2.filter(propose.getDescriptions(), d -> d instanceof RtpDescription),
520 input -> (RtpDescription) input
521 );
522 final Collection<Media> media = Collections2.transform(descriptions, RtpDescription::getMedia);
523 Preconditions.checkState(!media.contains(Media.UNKNOWN), "RTP descriptions contain unknown media");
524 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session proposal from " + from + " for " + media);
525 this.proposedMedia = Sets.newHashSet(media);
526 })) {
527 if (serverMsgId != null) {
528 this.message.setServerMsgId(serverMsgId);
529 }
530 this.message.setTime(timestamp);
531 startRinging();
532 } else {
533 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring session proposal because already in " + state);
534 }
535 }
536
537 private void startRinging() {
538 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received call from " + id.with + ". start ringing");
539 xmppConnectionService.getNotificationService().showIncomingCallNotification(id, getMedia());
540 }
541
542 private void receiveProceed(final Jid from, final String serverMsgId, final long timestamp) {
543 final Set<Media> media = Preconditions.checkNotNull(this.proposedMedia, "Proposed media has to be set before handling proceed");
544 Preconditions.checkState(media.size() > 0, "Proposed media should not be empty");
545 if (from.equals(id.with)) {
546 if (isInitiator()) {
547 if (transition(State.PROCEED)) {
548 if (serverMsgId != null) {
549 this.message.setServerMsgId(serverMsgId);
550 }
551 this.message.setTime(timestamp);
552 this.sendSessionInitiate(media, State.SESSION_INITIALIZED_PRE_APPROVED);
553 } else {
554 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because already in %s", id.account.getJid().asBareJid(), this.state));
555 }
556 } else {
557 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because we were not initializing", id.account.getJid().asBareJid()));
558 }
559 } else if (from.asBareJid().equals(id.account.getJid().asBareJid())) {
560 if (transition(State.ACCEPTED)) {
561 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": moved session with " + id.with + " into state accepted after received carbon copied procced");
562 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
563 this.finish();
564 }
565 } else {
566 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed from %s. was expected from %s", id.account.getJid().asBareJid(), from, id.with));
567 }
568 }
569
570 private void receiveRetract(final Jid from, final String serverMsgId, final long timestamp) {
571 if (from.equals(id.with)) {
572 if (transition(State.RETRACTED)) {
573 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
574 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": session with " + id.with + " has been retracted (serverMsgId=" + serverMsgId + ")");
575 if (serverMsgId != null) {
576 this.message.setServerMsgId(serverMsgId);
577 }
578 this.message.setTime(timestamp);
579 writeLogMessageMissed();
580 finish();
581 } else {
582 Log.d(Config.LOGTAG, "ignoring retract because already in " + this.state);
583 }
584 } else {
585 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received retract from " + from + ". expected retract from" + id.with + ". ignoring");
586 }
587 }
588
589 private void sendSessionInitiate(final Set<Media> media, final State targetState) {
590 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": prepare session-initiate");
591 discoverIceServers(iceServers -> sendSessionInitiate(media, targetState, iceServers));
592 }
593
594 private synchronized void sendSessionInitiate(final Set<Media> media, final State targetState, final List<PeerConnection.IceServer> iceServers) {
595 if (TERMINATED.contains(this.state)) {
596 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
597 return;
598 }
599 try {
600 setupWebRTC(media, iceServers);
601 } catch (WebRTCWrapper.InitializationException e) {
602 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to initialize webrtc");
603 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
604 return;
605 }
606 try {
607 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createOffer().get();
608 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
609 final RtpContentMap rtpContentMap = RtpContentMap.of(sessionDescription);
610 sendSessionInitiate(rtpContentMap, targetState);
611 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get();
612 } catch (final Exception e) {
613 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to sendSessionInitiate", e);
614 webRTCWrapper.close();
615 if (isInState(targetState)) {
616 sendSessionTerminate(Reason.FAILED_APPLICATION);
617 } else {
618 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
619 }
620 }
621 }
622
623 private void sendSessionInitiate(RtpContentMap rtpContentMap, final State targetState) {
624 this.initiatorRtpContentMap = rtpContentMap;
625 this.transitionOrThrow(targetState);
626 final JinglePacket sessionInitiate = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_INITIATE, id.sessionId);
627 send(sessionInitiate);
628 }
629
630 private void sendSessionTerminate(final Reason reason) {
631 sendSessionTerminate(reason, null);
632 }
633
634 private void sendSessionTerminate(final Reason reason, final String text) {
635 final State target = reasonToState(reason);
636 transitionOrThrow(target);
637 writeLogMessage(target);
638 final JinglePacket jinglePacket = new JinglePacket(JinglePacket.Action.SESSION_TERMINATE, id.sessionId);
639 jinglePacket.setReason(reason, text);
640 Log.d(Config.LOGTAG, jinglePacket.toString());
641 send(jinglePacket);
642 finish();
643 }
644
645 private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) {
646 final RtpContentMap transportInfo;
647 try {
648 final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap;
649 transportInfo = rtpContentMap.transportInfo(contentName, candidate);
650 } catch (Exception e) {
651 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName);
652 return;
653 }
654 final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId);
655 send(jinglePacket);
656 }
657
658 private void send(final JinglePacket jinglePacket) {
659 jinglePacket.setTo(id.with);
660 xmppConnectionService.sendIqPacket(id.account, jinglePacket, this::handleIqResponse);
661 }
662
663 private synchronized void handleIqResponse(final Account account, final IqPacket response) {
664 if (response.getType() == IqPacket.TYPE.ERROR) {
665 final String errorCondition = response.getErrorCondition();
666 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ-error from " + response.getFrom() + " in RTP session. " + errorCondition);
667 if (TERMINATED.contains(this.state)) {
668 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
669 return;
670 }
671 this.webRTCWrapper.close();
672 final State target;
673 if (Arrays.asList(
674 "service-unavailable",
675 "recipient-unavailable",
676 "remote-server-not-found",
677 "remote-server-timeout"
678 ).contains(errorCondition)) {
679 target = State.TERMINATED_CONNECTIVITY_ERROR;
680 } else {
681 target = State.TERMINATED_APPLICATION_FAILURE;
682 }
683 if (transition(target)) {
684 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": terminated session with " + id.with);
685 } else {
686 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": not transitioning because already at state=" + this.state);
687 }
688 } else if (response.getType() == IqPacket.TYPE.TIMEOUT) {
689 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ timeout in RTP session with " + id.with + ". terminating with connectivity error");
690 if (TERMINATED.contains(this.state)) {
691 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
692 return;
693 }
694 this.webRTCWrapper.close();
695 transition(State.TERMINATED_CONNECTIVITY_ERROR);
696 this.finish();
697 }
698 }
699
700 private void terminateWithOutOfOrder(final JinglePacket jinglePacket) {
701 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": terminating session with out-of-order");
702 this.webRTCWrapper.close();
703 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
704 respondWithOutOfOrder(jinglePacket);
705 this.finish();
706 }
707
708 private void respondWithOutOfOrder(final JinglePacket jinglePacket) {
709 jingleConnectionManager.respondWithJingleError(id.account, jinglePacket, "out-of-order", "unexpected-request", "wait");
710 }
711
712 private void respondOk(final JinglePacket jinglePacket) {
713 xmppConnectionService.sendIqPacket(id.account, jinglePacket.generateResponse(IqPacket.TYPE.RESULT), null);
714 }
715
716 public RtpEndUserState getEndUserState() {
717 switch (this.state) {
718 case PROPOSED:
719 case SESSION_INITIALIZED:
720 if (isInitiator()) {
721 return RtpEndUserState.RINGING;
722 } else {
723 return RtpEndUserState.INCOMING_CALL;
724 }
725 case PROCEED:
726 if (isInitiator()) {
727 return RtpEndUserState.RINGING;
728 } else {
729 return RtpEndUserState.ACCEPTING_CALL;
730 }
731 case SESSION_INITIALIZED_PRE_APPROVED:
732 if (isInitiator()) {
733 return RtpEndUserState.RINGING;
734 } else {
735 return RtpEndUserState.CONNECTING;
736 }
737 case SESSION_ACCEPTED:
738 final PeerConnection.PeerConnectionState state = webRTCWrapper.getState();
739 if (state == PeerConnection.PeerConnectionState.CONNECTED) {
740 return RtpEndUserState.CONNECTED;
741 } else if (state == PeerConnection.PeerConnectionState.NEW || state == PeerConnection.PeerConnectionState.CONNECTING) {
742 return RtpEndUserState.CONNECTING;
743 } else if (state == PeerConnection.PeerConnectionState.CLOSED) {
744 return RtpEndUserState.ENDING_CALL;
745 } else {
746 return RtpEndUserState.CONNECTIVITY_ERROR;
747 }
748 case REJECTED:
749 case TERMINATED_DECLINED_OR_BUSY:
750 if (isInitiator()) {
751 return RtpEndUserState.DECLINED_OR_BUSY;
752 } else {
753 return RtpEndUserState.ENDED;
754 }
755 case TERMINATED_SUCCESS:
756 case ACCEPTED:
757 case RETRACTED:
758 case TERMINATED_CANCEL_OR_TIMEOUT:
759 return RtpEndUserState.ENDED;
760 case TERMINATED_CONNECTIVITY_ERROR:
761 return RtpEndUserState.CONNECTIVITY_ERROR;
762 case TERMINATED_APPLICATION_FAILURE:
763 return RtpEndUserState.APPLICATION_ERROR;
764 }
765 throw new IllegalStateException(String.format("%s has no equivalent EndUserState", this.state));
766 }
767
768 public Set<Media> getMedia() {
769 if (isInState(State.NULL)) {
770 throw new IllegalStateException("RTP connection has not been initialized yet");
771 }
772 if (isInState(State.PROPOSED, State.PROCEED)) {
773 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
774 }
775 final RtpContentMap initiatorContentMap = initiatorRtpContentMap;
776 if (initiatorContentMap != null) {
777 return initiatorContentMap.getMedia();
778 } else {
779 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
780 }
781 }
782
783
784 public synchronized void acceptCall() {
785 switch (this.state) {
786 case PROPOSED:
787 acceptCallFromProposed();
788 break;
789 case SESSION_INITIALIZED:
790 acceptCallFromSessionInitialized();
791 break;
792 case ACCEPTED:
793 Log.w(Config.LOGTAG,id.account.getJid().asBareJid()+": the call has already been accepted with another client. UI was just lagging behind");
794 break;
795 case PROCEED:
796 case SESSION_ACCEPTED:
797 Log.w(Config.LOGTAG,id.account.getJid().asBareJid()+": the call has already been accepted. user probably double tapped the UI");
798 break;
799 default:
800 throw new IllegalStateException("Can not accept call from " + this.state);
801 }
802 }
803
804 public synchronized void rejectCall() {
805 switch (this.state) {
806 case PROPOSED:
807 rejectCallFromProposed();
808 break;
809 case SESSION_INITIALIZED:
810 rejectCallFromSessionInitiate();
811 break;
812 default:
813 throw new IllegalStateException("Can not reject call from " + this.state);
814 }
815 }
816
817 public synchronized void endCall() {
818 if (TERMINATED.contains(this.state)) {
819 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": received endCall() when session has already been terminated. nothing to do");
820 return;
821 }
822 if (isInState(State.PROPOSED) && !isInitiator()) {
823 rejectCallFromProposed();
824 return;
825 }
826 if (isInState(State.PROCEED)) {
827 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ending call while in state PROCEED just means ending the connection");
828 this.jingleConnectionManager.endSession(id, State.TERMINATED_SUCCESS);
829 this.webRTCWrapper.close();
830 this.finish();
831 transitionOrThrow(State.TERMINATED_SUCCESS); //arguably this wasn't success; but not a real failure either
832 return;
833 }
834 if (isInitiator() && isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED)) {
835 this.webRTCWrapper.close();
836 sendSessionTerminate(Reason.CANCEL);
837 return;
838 }
839 if (isInState(State.SESSION_INITIALIZED)) {
840 rejectCallFromSessionInitiate();
841 return;
842 }
843 if (isInState(State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
844 this.webRTCWrapper.close();
845 sendSessionTerminate(Reason.SUCCESS);
846 return;
847 }
848 if (isInState(State.TERMINATED_APPLICATION_FAILURE, State.TERMINATED_CONNECTIVITY_ERROR, State.TERMINATED_DECLINED_OR_BUSY)) {
849 Log.d(Config.LOGTAG, "ignoring request to end call because already in state " + this.state);
850 return;
851 }
852 throw new IllegalStateException("called 'endCall' while in state " + this.state + ". isInitiator=" + isInitiator());
853 }
854
855 private void setupWebRTC(final Set<Media> media, final List<PeerConnection.IceServer> iceServers) throws WebRTCWrapper.InitializationException {
856 this.jingleConnectionManager.ensureConnectionIsRegistered(this);
857 final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference;
858 if (media.contains(Media.VIDEO)) {
859 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.SPEAKER;
860 } else {
861 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.EARPIECE;
862 }
863 this.webRTCWrapper.setup(this.xmppConnectionService, speakerPhonePreference);
864 this.webRTCWrapper.initializePeerConnection(media, iceServers);
865 }
866
867 private void acceptCallFromProposed() {
868 transitionOrThrow(State.PROCEED);
869 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
870 this.sendJingleMessage("accept", id.account.getJid().asBareJid());
871 this.sendJingleMessage("proceed");
872 }
873
874 private void rejectCallFromProposed() {
875 transitionOrThrow(State.REJECTED);
876 writeLogMessageMissed();
877 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
878 this.sendJingleMessage("reject");
879 finish();
880 }
881
882 private void rejectCallFromSessionInitiate() {
883 webRTCWrapper.close();
884 sendSessionTerminate(Reason.DECLINE);
885 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
886 }
887
888 private void sendJingleMessage(final String action) {
889 sendJingleMessage(action, id.with);
890 }
891
892 private void sendJingleMessage(final String action, final Jid to) {
893 final MessagePacket messagePacket = new MessagePacket();
894 if ("proceed".equals(action)) {
895 messagePacket.setId(JINGLE_MESSAGE_PROCEED_ID_PREFIX + id.sessionId);
896 }
897 messagePacket.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
898 messagePacket.setTo(to);
899 messagePacket.addChild(action, Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId);
900 messagePacket.addChild("store", "urn:xmpp:hints");
901 xmppConnectionService.sendMessagePacket(id.account, messagePacket);
902 }
903
904 private void acceptCallFromSessionInitialized() {
905 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
906 sendSessionAccept();
907 }
908
909 private synchronized boolean isInState(State... state) {
910 return Arrays.asList(state).contains(this.state);
911 }
912
913 private boolean transition(final State target) {
914 return transition(target, null);
915 }
916
917 private synchronized boolean transition(final State target, final Runnable runnable) {
918 final Collection<State> validTransitions = VALID_TRANSITIONS.get(this.state);
919 if (validTransitions != null && validTransitions.contains(target)) {
920 this.state = target;
921 if (runnable != null) {
922 runnable.run();
923 }
924 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target);
925 updateEndUserState();
926 updateOngoingCallNotification();
927 return true;
928 } else {
929 return false;
930 }
931 }
932
933 public void transitionOrThrow(final State target) {
934 if (!transition(target)) {
935 throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target));
936 }
937 }
938
939 @Override
940 public void onIceCandidate(final IceCandidate iceCandidate) {
941 final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp);
942 Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString());
943 sendTransportInfo(iceCandidate.sdpMid, candidate);
944 }
945
946 @Override
947 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
948 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnectionState changed to " + newState);
949 if (newState == PeerConnection.PeerConnectionState.CONNECTED && this.rtpConnectionStarted == 0) {
950 this.rtpConnectionStarted = SystemClock.elapsedRealtime();
951 }
952 //TODO 'DISCONNECTED' might be an opportunity to renew the offer and send a transport-replace
953 //TODO exact syntax is yet to be determined but transport-replace sounds like the most reasonable
954 //as there is no content-replace
955 if (Arrays.asList(PeerConnection.PeerConnectionState.FAILED, PeerConnection.PeerConnectionState.DISCONNECTED).contains(newState)) {
956 if (TERMINATED.contains(this.state)) {
957 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": not sending session-terminate after connectivity error because session is already in state " + this.state);
958 return;
959 }
960 new Thread(this::closeWebRTCSessionAfterFailedConnection).start();
961 } else {
962 updateEndUserState();
963 }
964 }
965
966 private void closeWebRTCSessionAfterFailedConnection() {
967 this.webRTCWrapper.close();
968 synchronized (this) {
969 if (TERMINATED.contains(state)) {
970 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": no need to send session-terminate after failed connection. Other party already did");
971 return;
972 }
973 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
974 }
975 }
976
977 public AppRTCAudioManager getAudioManager() {
978 return webRTCWrapper.getAudioManager();
979 }
980
981 public boolean isMicrophoneEnabled() {
982 return webRTCWrapper.isMicrophoneEnabled();
983 }
984
985 public void setMicrophoneEnabled(final boolean enabled) {
986 webRTCWrapper.setMicrophoneEnabled(enabled);
987 }
988
989 public boolean isVideoEnabled() {
990 return webRTCWrapper.isVideoEnabled();
991 }
992
993 public void setVideoEnabled(final boolean enabled) {
994 webRTCWrapper.setVideoEnabled(enabled);
995 }
996
997 @Override
998 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
999 xmppConnectionService.notifyJingleRtpConnectionUpdate(selectedAudioDevice, availableAudioDevices);
1000 }
1001
1002 private void updateEndUserState() {
1003 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, getEndUserState());
1004 }
1005
1006 private void updateOngoingCallNotification() {
1007 if (STATES_SHOWING_ONGOING_CALL.contains(this.state)) {
1008 xmppConnectionService.setOngoingCall(id, getMedia());
1009 } else {
1010 xmppConnectionService.removeOngoingCall();
1011 }
1012 }
1013
1014 private void discoverIceServers(final OnIceServersDiscovered onIceServersDiscovered) {
1015 if (id.account.getXmppConnection().getFeatures().externalServiceDiscovery()) {
1016 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1017 request.setTo(Jid.of(id.account.getJid().getDomain()));
1018 request.addChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1019 xmppConnectionService.sendIqPacket(id.account, request, (account, response) -> {
1020 ImmutableList.Builder<PeerConnection.IceServer> listBuilder = new ImmutableList.Builder<>();
1021 if (response.getType() == IqPacket.TYPE.RESULT) {
1022 final Element services = response.findChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1023 final List<Element> children = services == null ? Collections.emptyList() : services.getChildren();
1024 for (final Element child : children) {
1025 if ("service".equals(child.getName())) {
1026 final String type = child.getAttribute("type");
1027 final String host = child.getAttribute("host");
1028 final String sport = child.getAttribute("port");
1029 final Integer port = sport == null ? null : Ints.tryParse(sport);
1030 final String transport = child.getAttribute("transport");
1031 final String username = child.getAttribute("username");
1032 final String password = child.getAttribute("password");
1033 if (Strings.isNullOrEmpty(host) || port == null) {
1034 continue;
1035 }
1036 if (port < 0 || port > 65535) {
1037 continue;
1038 }
1039 if (Arrays.asList("stun", "stuns", "turn", "turns").contains(type) && Arrays.asList("udp", "tcp").contains(transport)) {
1040 if (Arrays.asList("stuns", "turns").contains(type) && "udp".equals(transport)) {
1041 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping invalid combination of udp/tls in external services");
1042 continue;
1043 }
1044 //TODO wrap ipv6 addresses
1045 PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer.builder(String.format("%s:%s:%s?transport=%s", type, host, port, transport));
1046 if (username != null && password != null) {
1047 iceServerBuilder.setUsername(username);
1048 iceServerBuilder.setPassword(password);
1049 } else if (Arrays.asList("turn", "turns").contains(type)) {
1050 //The WebRTC spec requires throwing an InvalidAccessError when username (from libwebrtc source coder)
1051 //https://chromium.googlesource.com/external/webrtc/+/master/pc/ice_server_parsing.cc
1052 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping " + type + "/" + transport + " without username and password");
1053 continue;
1054 }
1055 final PeerConnection.IceServer iceServer = iceServerBuilder.createIceServer();
1056 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": discovered ICE Server: " + iceServer);
1057 listBuilder.add(iceServer);
1058 }
1059 }
1060 }
1061 }
1062 List<PeerConnection.IceServer> iceServers = listBuilder.build();
1063 if (iceServers.size() == 0) {
1064 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no ICE server found " + response);
1065 }
1066 onIceServersDiscovered.onIceServersDiscovered(iceServers);
1067 });
1068 } else {
1069 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": has no external service discovery");
1070 onIceServersDiscovered.onIceServersDiscovered(Collections.emptyList());
1071 }
1072 }
1073
1074 private void finish() {
1075 this.webRTCWrapper.verifyClosed();
1076 this.jingleConnectionManager.finishConnection(this);
1077 }
1078
1079 private void writeLogMessage(final State state) {
1080 final long started = this.rtpConnectionStarted;
1081 long duration = started <= 0 ? 0 : SystemClock.elapsedRealtime() - started;
1082 if (state == State.TERMINATED_SUCCESS || (state == State.TERMINATED_CONNECTIVITY_ERROR && duration > 0)) {
1083 writeLogMessageSuccess(duration);
1084 } else {
1085 writeLogMessageMissed();
1086 }
1087 }
1088
1089 private void writeLogMessageSuccess(final long duration) {
1090 this.message.setBody(new RtpSessionStatus(true, duration).toString());
1091 this.writeMessage();
1092 }
1093
1094 private void writeLogMessageMissed() {
1095 this.message.setBody(new RtpSessionStatus(false, 0).toString());
1096 this.writeMessage();
1097 }
1098
1099 private void writeMessage() {
1100 final Conversational conversational = message.getConversation();
1101 if (conversational instanceof Conversation) {
1102 ((Conversation) conversational).add(this.message);
1103 xmppConnectionService.databaseBackend.createMessage(message);
1104 xmppConnectionService.updateConversationUi();
1105 } else {
1106 throw new IllegalStateException("Somehow the conversation in a message was a stub");
1107 }
1108 }
1109
1110 public State getState() {
1111 return this.state;
1112 }
1113
1114 public Optional<VideoTrack> geLocalVideoTrack() {
1115 return webRTCWrapper.getLocalVideoTrack();
1116 }
1117
1118 public Optional<VideoTrack> getRemoteVideoTrack() {
1119 return webRTCWrapper.getRemoteVideoTrack();
1120 }
1121
1122
1123 public EglBase.Context getEglBaseContext() {
1124 return webRTCWrapper.getEglBaseContext();
1125 }
1126
1127 public void setProposedMedia(final Set<Media> media) {
1128 this.proposedMedia = media;
1129 }
1130
1131 private interface OnIceServersDiscovered {
1132 void onIceServersDiscovered(List<PeerConnection.IceServer> iceServers);
1133 }
1134}