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