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