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