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