1package eu.siacs.conversations.xmpp.jingle;
2
3import android.os.SystemClock;
4import android.util.Log;
5
6import com.google.common.base.Optional;
7import com.google.common.base.Preconditions;
8import com.google.common.base.Strings;
9import com.google.common.collect.Collections2;
10import com.google.common.collect.ImmutableList;
11import com.google.common.collect.ImmutableMap;
12import com.google.common.collect.Sets;
13import com.google.common.primitives.Ints;
14
15import org.webrtc.EglBase;
16import org.webrtc.IceCandidate;
17import org.webrtc.PeerConnection;
18import org.webrtc.VideoTrack;
19
20import java.util.ArrayDeque;
21import java.util.Arrays;
22import java.util.Collection;
23import java.util.Collections;
24import java.util.List;
25import java.util.Map;
26import java.util.Set;
27import java.util.concurrent.ScheduledFuture;
28import java.util.concurrent.TimeUnit;
29
30import eu.siacs.conversations.Config;
31import eu.siacs.conversations.entities.Account;
32import eu.siacs.conversations.entities.Conversation;
33import eu.siacs.conversations.entities.Conversational;
34import eu.siacs.conversations.entities.Message;
35import eu.siacs.conversations.entities.RtpSessionStatus;
36import eu.siacs.conversations.services.AppRTCAudioManager;
37import eu.siacs.conversations.xml.Element;
38import eu.siacs.conversations.xml.Namespace;
39import eu.siacs.conversations.xmpp.jingle.stanzas.Group;
40import eu.siacs.conversations.xmpp.jingle.stanzas.IceUdpTransportInfo;
41import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
42import eu.siacs.conversations.xmpp.jingle.stanzas.Propose;
43import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
44import eu.siacs.conversations.xmpp.jingle.stanzas.RtpDescription;
45import eu.siacs.conversations.xmpp.stanzas.IqPacket;
46import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
47import rocks.xmpp.addr.Jid;
48
49public class JingleRtpConnection extends AbstractJingleConnection implements WebRTCWrapper.EventCallback {
50
51 private static final long BUSY_TIME_OUT = 30;
52
53 public static final List<State> STATES_SHOWING_ONGOING_CALL = Arrays.asList(
54 State.PROCEED,
55 State.SESSION_INITIALIZED,
56 State.SESSION_INITIALIZED_PRE_APPROVED,
57 State.SESSION_ACCEPTED
58 );
59
60 private static final List<State> TERMINATED = Arrays.asList(
61 State.TERMINATED_SUCCESS,
62 State.TERMINATED_DECLINED_OR_BUSY,
63 State.TERMINATED_CONNECTIVITY_ERROR,
64 State.TERMINATED_CANCEL_OR_TIMEOUT,
65 State.TERMINATED_APPLICATION_FAILURE
66 );
67
68 private static final Map<State, Collection<State>> VALID_TRANSITIONS;
69
70 static {
71 final ImmutableMap.Builder<State, Collection<State>> transitionBuilder = new ImmutableMap.Builder<>();
72 transitionBuilder.put(State.NULL, ImmutableList.of(
73 State.PROPOSED,
74 State.SESSION_INITIALIZED,
75 State.TERMINATED_APPLICATION_FAILURE
76 ));
77 transitionBuilder.put(State.PROPOSED, ImmutableList.of(
78 State.ACCEPTED,
79 State.PROCEED,
80 State.REJECTED,
81 State.RETRACTED,
82 State.TERMINATED_APPLICATION_FAILURE,
83 State.TERMINATED_CONNECTIVITY_ERROR //only used when the xmpp connection rebinds
84 ));
85 transitionBuilder.put(State.PROCEED, ImmutableList.of(
86 State.SESSION_INITIALIZED_PRE_APPROVED,
87 State.TERMINATED_SUCCESS,
88 State.TERMINATED_APPLICATION_FAILURE,
89 State.TERMINATED_CONNECTIVITY_ERROR //at this state used for error bounces of the proceed message
90 ));
91 transitionBuilder.put(State.SESSION_INITIALIZED, ImmutableList.of(
92 State.SESSION_ACCEPTED,
93 State.TERMINATED_SUCCESS,
94 State.TERMINATED_DECLINED_OR_BUSY,
95 State.TERMINATED_CONNECTIVITY_ERROR, //at this state used for IQ errors and IQ timeouts
96 State.TERMINATED_CANCEL_OR_TIMEOUT,
97 State.TERMINATED_APPLICATION_FAILURE
98 ));
99 transitionBuilder.put(State.SESSION_INITIALIZED_PRE_APPROVED, ImmutableList.of(
100 State.SESSION_ACCEPTED,
101 State.TERMINATED_SUCCESS,
102 State.TERMINATED_DECLINED_OR_BUSY,
103 State.TERMINATED_CONNECTIVITY_ERROR, //at this state used for IQ errors and IQ timeouts
104 State.TERMINATED_CANCEL_OR_TIMEOUT,
105 State.TERMINATED_APPLICATION_FAILURE
106 ));
107 transitionBuilder.put(State.SESSION_ACCEPTED, ImmutableList.of(
108 State.TERMINATED_SUCCESS,
109 State.TERMINATED_DECLINED_OR_BUSY,
110 State.TERMINATED_CONNECTIVITY_ERROR,
111 State.TERMINATED_CANCEL_OR_TIMEOUT,
112 State.TERMINATED_APPLICATION_FAILURE
113 ));
114 VALID_TRANSITIONS = transitionBuilder.build();
115 }
116
117 private final WebRTCWrapper webRTCWrapper = new WebRTCWrapper(this);
118 private final ArrayDeque<IceCandidate> pendingIceCandidates = new ArrayDeque<>();
119 private final Message message;
120 private State state = State.NULL;
121 private Set<Media> proposedMedia;
122 private RtpContentMap initiatorRtpContentMap;
123 private RtpContentMap responderRtpContentMap;
124 private long rtpConnectionStarted = 0; //time of 'connected'
125 private ScheduledFuture<?> ringingTimeoutFuture;
126
127 JingleRtpConnection(JingleConnectionManager jingleConnectionManager, Id id, Jid initiator) {
128 super(jingleConnectionManager, id, initiator);
129 final Conversation conversation = jingleConnectionManager.getXmppConnectionService().findOrCreateConversation(
130 id.account,
131 id.with.asBareJid(),
132 false,
133 false
134 );
135 this.message = new Message(
136 conversation,
137 isInitiator() ? Message.STATUS_SEND : Message.STATUS_RECEIVED,
138 Message.TYPE_RTP_SESSION,
139 id.sessionId
140 );
141 }
142
143 private static State reasonToState(Reason reason) {
144 switch (reason) {
145 case SUCCESS:
146 return State.TERMINATED_SUCCESS;
147 case DECLINE:
148 case BUSY:
149 return State.TERMINATED_DECLINED_OR_BUSY;
150 case CANCEL:
151 case TIMEOUT:
152 return State.TERMINATED_CANCEL_OR_TIMEOUT;
153 case FAILED_APPLICATION:
154 case SECURITY_ERROR:
155 case UNSUPPORTED_TRANSPORTS:
156 case UNSUPPORTED_APPLICATIONS:
157 return State.TERMINATED_APPLICATION_FAILURE;
158 default:
159 return State.TERMINATED_CONNECTIVITY_ERROR;
160 }
161 }
162
163 @Override
164 synchronized void deliverPacket(final JinglePacket jinglePacket) {
165 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": packet delivered to JingleRtpConnection");
166 switch (jinglePacket.getAction()) {
167 case SESSION_INITIATE:
168 receiveSessionInitiate(jinglePacket);
169 break;
170 case TRANSPORT_INFO:
171 receiveTransportInfo(jinglePacket);
172 break;
173 case SESSION_ACCEPT:
174 receiveSessionAccept(jinglePacket);
175 break;
176 case SESSION_TERMINATE:
177 receiveSessionTerminate(jinglePacket);
178 break;
179 default:
180 respondOk(jinglePacket);
181 Log.d(Config.LOGTAG, String.format("%s: received unhandled jingle action %s", id.account.getJid().asBareJid(), jinglePacket.getAction()));
182 break;
183 }
184 }
185
186 @Override
187 synchronized void notifyRebound() {
188 if (isTerminated()) {
189 return;
190 }
191 webRTCWrapper.close();
192 if (!isInitiator() && isInState(State.PROPOSED, State.SESSION_INITIALIZED)) {
193 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
194 }
195 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
196 //we might have already changed resources (full jid) at this point; so this might not even reach the other party
197 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
198 } else {
199 transitionOrThrow(State.TERMINATED_CONNECTIVITY_ERROR);
200 finish();
201 }
202 }
203
204 private void receiveSessionTerminate(final JinglePacket jinglePacket) {
205 respondOk(jinglePacket);
206 final JinglePacket.ReasonWrapper wrapper = jinglePacket.getReason();
207 final State previous = this.state;
208 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session terminate reason=" + wrapper.reason + "(" + Strings.nullToEmpty(wrapper.text) + ") while in state " + previous);
209 if (TERMINATED.contains(previous)) {
210 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring session terminate because already in " + previous);
211 return;
212 }
213 webRTCWrapper.close();
214 final State target = reasonToState(wrapper.reason);
215 transitionOrThrow(target);
216 writeLogMessage(target);
217 if (previous == State.PROPOSED || previous == State.SESSION_INITIALIZED) {
218 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
219 }
220 finish();
221 }
222
223 private void receiveTransportInfo(final JinglePacket jinglePacket) {
224 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
225 respondOk(jinglePacket);
226 final RtpContentMap contentMap;
227 try {
228 contentMap = RtpContentMap.of(jinglePacket);
229 } catch (IllegalArgumentException | NullPointerException e) {
230 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents; ignoring", e);
231 return;
232 }
233 final RtpContentMap rtpContentMap = isInitiator() ? this.responderRtpContentMap : this.initiatorRtpContentMap;
234 final Group originalGroup = rtpContentMap != null ? rtpContentMap.group : null;
235 final List<String> identificationTags = originalGroup == null ? Collections.emptyList() : originalGroup.getIdentificationTags();
236 if (identificationTags.size() == 0) {
237 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no identification tags found in initial offer. we won't be able to calculate mLineIndices");
238 }
239 for (final Map.Entry<String, RtpContentMap.DescriptionTransport> content : contentMap.contents.entrySet()) {
240 final String ufrag = content.getValue().transport.getAttribute("ufrag");
241 for (final IceUdpTransportInfo.Candidate candidate : content.getValue().transport.getCandidates()) {
242 final String sdp;
243 try {
244 sdp = candidate.toSdpAttribute(ufrag);
245 } catch (IllegalArgumentException e) {
246 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring invalid ICE candidate " + e.getMessage());
247 continue;
248 }
249 final String sdpMid = content.getKey();
250 final int mLineIndex = identificationTags.indexOf(sdpMid);
251 final IceCandidate iceCandidate = new IceCandidate(sdpMid, mLineIndex, sdp);
252 if (isInState(State.SESSION_ACCEPTED)) {
253 Log.d(Config.LOGTAG, "received candidate: " + iceCandidate);
254 this.webRTCWrapper.addIceCandidate(iceCandidate);
255 } else {
256 this.pendingIceCandidates.offer(iceCandidate);
257 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": put ICE candidate on backlog");
258 }
259 }
260 }
261 } else {
262 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received transport info while in state=" + this.state);
263 terminateWithOutOfOrder(jinglePacket);
264 }
265 }
266
267 private void receiveSessionInitiate(final JinglePacket jinglePacket) {
268 if (isInitiator()) {
269 Log.d(Config.LOGTAG, String.format("%s: received session-initiate even though we were initiating", id.account.getJid().asBareJid()));
270 terminateWithOutOfOrder(jinglePacket);
271 return;
272 }
273 final RtpContentMap contentMap;
274 try {
275 contentMap = RtpContentMap.of(jinglePacket);
276 contentMap.requireContentDescriptions();
277 contentMap.requireDTLSFingerprint();
278 } catch (final RuntimeException e) {
279 respondOk(jinglePacket);
280 sendSessionTerminate(Reason.of(e), e.getMessage());
281 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
282 return;
283 }
284 Log.d(Config.LOGTAG, "processing session-init with " + contentMap.contents.size() + " contents");
285 final State target;
286 if (this.state == State.PROCEED) {
287 Preconditions.checkState(
288 proposedMedia != null && proposedMedia.size() > 0,
289 "proposed media must be set when processing pre-approved session-initiate"
290 );
291 if (!this.proposedMedia.equals(contentMap.getMedia())) {
292 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
293 "Your session proposal (Jingle Message Initiation) included media %s but your session-initiate was %s",
294 this.proposedMedia,
295 contentMap.getMedia()
296 ));
297 return;
298 }
299 target = State.SESSION_INITIALIZED_PRE_APPROVED;
300 } else {
301 target = State.SESSION_INITIALIZED;
302 }
303 if (transition(target, () -> this.initiatorRtpContentMap = contentMap)) {
304 respondOk(jinglePacket);
305 if (target == State.SESSION_INITIALIZED_PRE_APPROVED) {
306 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": automatically accepting session-initiate");
307 sendSessionAccept();
308 } else {
309 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received not pre-approved session-initiate. start ringing");
310 startRinging();
311 }
312 } else {
313 Log.d(Config.LOGTAG, String.format("%s: received session-initiate while in state %s", id.account.getJid().asBareJid(), state));
314 terminateWithOutOfOrder(jinglePacket);
315 }
316 }
317
318 private void receiveSessionAccept(final JinglePacket jinglePacket) {
319 if (!isInitiator()) {
320 Log.d(Config.LOGTAG, String.format("%s: received session-accept even though we were responding", id.account.getJid().asBareJid()));
321 terminateWithOutOfOrder(jinglePacket);
322 return;
323 }
324 final RtpContentMap contentMap;
325 try {
326 contentMap = RtpContentMap.of(jinglePacket);
327 contentMap.requireContentDescriptions();
328 contentMap.requireDTLSFingerprint();
329 } catch (final RuntimeException e) {
330 respondOk(jinglePacket);
331 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents in session-accept", e);
332 webRTCWrapper.close();
333 sendSessionTerminate(Reason.of(e), e.getMessage());
334 return;
335 }
336 final Set<Media> initiatorMedia = this.initiatorRtpContentMap.getMedia();
337 if (!initiatorMedia.equals(contentMap.getMedia())) {
338 sendSessionTerminate(Reason.SECURITY_ERROR, String.format(
339 "Your session-included included media %s but our session-initiate was %s",
340 this.proposedMedia,
341 contentMap.getMedia()
342 ));
343 return;
344 }
345 Log.d(Config.LOGTAG, "processing session-accept with " + contentMap.contents.size() + " contents");
346 if (transition(State.SESSION_ACCEPTED)) {
347 respondOk(jinglePacket);
348 receiveSessionAccept(contentMap);
349 } else {
350 Log.d(Config.LOGTAG, String.format("%s: received session-accept while in state %s", id.account.getJid().asBareJid(), state));
351 respondOk(jinglePacket);
352 }
353 }
354
355 private void receiveSessionAccept(final RtpContentMap contentMap) {
356 this.responderRtpContentMap = contentMap;
357 final SessionDescription sessionDescription;
358 try {
359 sessionDescription = SessionDescription.of(contentMap);
360 } catch (final IllegalArgumentException | NullPointerException e) {
361 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-accept to SDP", e);
362 webRTCWrapper.close();
363 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
364 return;
365 }
366 org.webrtc.SessionDescription answer = new org.webrtc.SessionDescription(
367 org.webrtc.SessionDescription.Type.ANSWER,
368 sessionDescription.toString()
369 );
370 try {
371 this.webRTCWrapper.setRemoteDescription(answer).get();
372 } catch (Exception e) {
373 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to set remote description after receiving session-accept", e);
374 webRTCWrapper.close();
375 sendSessionTerminate(Reason.FAILED_APPLICATION);
376 }
377 }
378
379 private void sendSessionAccept() {
380 final RtpContentMap rtpContentMap = this.initiatorRtpContentMap;
381 if (rtpContentMap == null) {
382 throw new IllegalStateException("initiator RTP Content Map has not been set");
383 }
384 final SessionDescription offer;
385 try {
386 offer = SessionDescription.of(rtpContentMap);
387 } catch (final IllegalArgumentException | NullPointerException e) {
388 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable convert offer from session-initiate to SDP", e);
389 webRTCWrapper.close();
390 sendSessionTerminate(Reason.FAILED_APPLICATION, e.getMessage());
391 return;
392 }
393 sendSessionAccept(rtpContentMap.getMedia(), offer);
394 }
395
396 private void sendSessionAccept(final Set<Media> media, final SessionDescription offer) {
397 discoverIceServers(iceServers -> sendSessionAccept(media, offer, iceServers));
398 }
399
400 private synchronized void sendSessionAccept(final Set<Media> media, final SessionDescription offer, final List<PeerConnection.IceServer> iceServers) {
401 if (isTerminated()) {
402 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
403 return;
404 }
405 try {
406 setupWebRTC(media, iceServers);
407 } catch (WebRTCWrapper.InitializationException e) {
408 sendSessionTerminate(Reason.FAILED_APPLICATION);
409 return;
410 }
411 final org.webrtc.SessionDescription sdp = new org.webrtc.SessionDescription(
412 org.webrtc.SessionDescription.Type.OFFER,
413 offer.toString()
414 );
415 try {
416 this.webRTCWrapper.setRemoteDescription(sdp).get();
417 addIceCandidatesFromBlackLog();
418 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createAnswer().get();
419 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
420 final RtpContentMap respondingRtpContentMap = RtpContentMap.of(sessionDescription);
421 sendSessionAccept(respondingRtpContentMap);
422 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription);
423 } catch (Exception e) {
424 Log.d(Config.LOGTAG, "unable to send session accept", e);
425
426 }
427 }
428
429 private void addIceCandidatesFromBlackLog() {
430 while (!this.pendingIceCandidates.isEmpty()) {
431 final IceCandidate iceCandidate = this.pendingIceCandidates.poll();
432 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": added ICE candidate from back log " + iceCandidate);
433 this.webRTCWrapper.addIceCandidate(iceCandidate);
434 }
435 }
436
437 private void sendSessionAccept(final RtpContentMap rtpContentMap) {
438 this.responderRtpContentMap = rtpContentMap;
439 this.transitionOrThrow(State.SESSION_ACCEPTED);
440 final JinglePacket sessionAccept = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_ACCEPT, id.sessionId);
441 Log.d(Config.LOGTAG, sessionAccept.toString());
442 send(sessionAccept);
443 }
444
445 synchronized void deliveryMessage(final Jid from, final Element message, final String serverMessageId, final long timestamp) {
446 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": delivered message to JingleRtpConnection " + message);
447 switch (message.getName()) {
448 case "propose":
449 receivePropose(from, Propose.upgrade(message), serverMessageId, timestamp);
450 break;
451 case "proceed":
452 receiveProceed(from, serverMessageId, timestamp);
453 break;
454 case "retract":
455 receiveRetract(from, serverMessageId, timestamp);
456 break;
457 case "reject":
458 receiveReject(from, serverMessageId, timestamp);
459 break;
460 case "accept":
461 receiveAccept(from, serverMessageId, timestamp);
462 break;
463 default:
464 break;
465 }
466 }
467
468 void deliverFailedProceed() {
469 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": receive message error for proceed message");
470 if (transition(State.TERMINATED_CONNECTIVITY_ERROR)) {
471 webRTCWrapper.close();
472 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into connectivity error");
473 this.finish();
474 }
475 }
476
477 private void receiveAccept(final Jid from, final String serverMsgId, final long timestamp) {
478 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
479 if (originatedFromMyself) {
480 if (transition(State.ACCEPTED)) {
481 if (serverMsgId != null) {
482 this.message.setServerMsgId(serverMsgId);
483 }
484 this.message.setTime(timestamp);
485 this.message.setCarbon(true); //indicate that call was accepted on other device
486 this.writeLogMessageSuccess(0);
487 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
488 this.finish();
489 } else {
490 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to transition to accept because already in state=" + this.state);
491 }
492 } else {
493 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring 'accept' from " + from);
494 }
495 }
496
497 private void receiveReject(Jid from, String serverMsgId, long timestamp) {
498 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
499 //reject from another one of my clients
500 if (originatedFromMyself) {
501 if (transition(State.REJECTED)) {
502 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
503 this.finish();
504 if (serverMsgId != null) {
505 this.message.setServerMsgId(serverMsgId);
506 }
507 this.message.setTime(timestamp);
508 this.message.setCarbon(true); //indicate that call was rejected on other device
509 writeLogMessageMissed();
510 } else {
511 Log.d(Config.LOGTAG, "not able to transition into REJECTED because already in " + this.state);
512 }
513 } else {
514 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring reject from " + from + " for session with " + id.with);
515 }
516 }
517
518 private void receivePropose(final Jid from, final Propose propose, final String serverMsgId, final long timestamp) {
519 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
520 if (originatedFromMyself) {
521 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": saw proposal from mysql. ignoring");
522 } else if (transition(State.PROPOSED, () -> {
523 final Collection<RtpDescription> descriptions = Collections2.transform(
524 Collections2.filter(propose.getDescriptions(), d -> d instanceof RtpDescription),
525 input -> (RtpDescription) input
526 );
527 final Collection<Media> media = Collections2.transform(descriptions, RtpDescription::getMedia);
528 Preconditions.checkState(!media.contains(Media.UNKNOWN), "RTP descriptions contain unknown media");
529 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session proposal from " + from + " for " + media);
530 this.proposedMedia = Sets.newHashSet(media);
531 })) {
532 if (serverMsgId != null) {
533 this.message.setServerMsgId(serverMsgId);
534 }
535 this.message.setTime(timestamp);
536 startRinging();
537 } else {
538 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring session proposal because already in " + state);
539 }
540 }
541
542 private void startRinging() {
543 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received call from " + id.with + ". start ringing");
544 ringingTimeoutFuture = jingleConnectionManager.schedule(this::ringingTimeout, BUSY_TIME_OUT, TimeUnit.SECONDS);
545 xmppConnectionService.getNotificationService().showIncomingCallNotification(id, getMedia());
546 }
547
548 private synchronized void ringingTimeout() {
549 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": timeout reached for ringing");
550 switch (this.state) {
551 case PROPOSED:
552 rejectCallFromProposed();
553 break;
554 case SESSION_INITIALIZED:
555 rejectCallFromSessionInitiate();
556 break;
557 }
558 }
559
560 private void cancelRingingTimeout() {
561 final ScheduledFuture<?> future = this.ringingTimeoutFuture;
562 if (future != null && !future.isCancelled()) {
563 future.cancel(false);
564 }
565 }
566
567 private void receiveProceed(final Jid from, final String serverMsgId, final long timestamp) {
568 final Set<Media> media = Preconditions.checkNotNull(this.proposedMedia, "Proposed media has to be set before handling proceed");
569 Preconditions.checkState(media.size() > 0, "Proposed media should not be empty");
570 if (from.equals(id.with)) {
571 if (isInitiator()) {
572 if (transition(State.PROCEED)) {
573 if (serverMsgId != null) {
574 this.message.setServerMsgId(serverMsgId);
575 }
576 this.message.setTime(timestamp);
577 this.sendSessionInitiate(media, State.SESSION_INITIALIZED_PRE_APPROVED);
578 } else {
579 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because already in %s", id.account.getJid().asBareJid(), this.state));
580 }
581 } else {
582 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because we were not initializing", id.account.getJid().asBareJid()));
583 }
584 } else if (from.asBareJid().equals(id.account.getJid().asBareJid())) {
585 if (transition(State.ACCEPTED)) {
586 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": moved session with " + id.with + " into state accepted after received carbon copied procced");
587 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
588 this.finish();
589 }
590 } else {
591 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed from %s. was expected from %s", id.account.getJid().asBareJid(), from, id.with));
592 }
593 }
594
595 private void receiveRetract(final Jid from, final String serverMsgId, final long timestamp) {
596 if (from.equals(id.with)) {
597 if (transition(State.RETRACTED)) {
598 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
599 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": session with " + id.with + " has been retracted (serverMsgId=" + serverMsgId + ")");
600 if (serverMsgId != null) {
601 this.message.setServerMsgId(serverMsgId);
602 }
603 this.message.setTime(timestamp);
604 writeLogMessageMissed();
605 finish();
606 } else {
607 Log.d(Config.LOGTAG, "ignoring retract because already in " + this.state);
608 }
609 } else {
610 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received retract from " + from + ". expected retract from" + id.with + ". ignoring");
611 }
612 }
613
614 private void sendSessionInitiate(final Set<Media> media, final State targetState) {
615 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": prepare session-initiate");
616 discoverIceServers(iceServers -> sendSessionInitiate(media, targetState, iceServers));
617 }
618
619 private synchronized void sendSessionInitiate(final Set<Media> media, final State targetState, final List<PeerConnection.IceServer> iceServers) {
620 if (isTerminated()) {
621 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": ICE servers got discovered when session was already terminated. nothing to do.");
622 return;
623 }
624 try {
625 setupWebRTC(media, iceServers);
626 } catch (WebRTCWrapper.InitializationException e) {
627 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to initialize webrtc");
628 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
629 return;
630 }
631 try {
632 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createOffer().get();
633 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
634 final RtpContentMap rtpContentMap = RtpContentMap.of(sessionDescription);
635 sendSessionInitiate(rtpContentMap, targetState);
636 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get();
637 } catch (final Exception e) {
638 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to sendSessionInitiate", e);
639 webRTCWrapper.close();
640 if (isInState(targetState)) {
641 sendSessionTerminate(Reason.FAILED_APPLICATION);
642 } else {
643 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
644 }
645 }
646 }
647
648 private void sendSessionInitiate(RtpContentMap rtpContentMap, final State targetState) {
649 this.initiatorRtpContentMap = rtpContentMap;
650 this.transitionOrThrow(targetState);
651 final JinglePacket sessionInitiate = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_INITIATE, id.sessionId);
652 send(sessionInitiate);
653 }
654
655 private void sendSessionTerminate(final Reason reason) {
656 sendSessionTerminate(reason, null);
657 }
658
659 private void sendSessionTerminate(final Reason reason, final String text) {
660 final State target = reasonToState(reason);
661 transitionOrThrow(target);
662 writeLogMessage(target);
663 final JinglePacket jinglePacket = new JinglePacket(JinglePacket.Action.SESSION_TERMINATE, id.sessionId);
664 jinglePacket.setReason(reason, text);
665 Log.d(Config.LOGTAG, jinglePacket.toString());
666 send(jinglePacket);
667 finish();
668 }
669
670 private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) {
671 final RtpContentMap transportInfo;
672 try {
673 final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap;
674 transportInfo = rtpContentMap.transportInfo(contentName, candidate);
675 } catch (Exception e) {
676 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName);
677 return;
678 }
679 final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId);
680 send(jinglePacket);
681 }
682
683 private void send(final JinglePacket jinglePacket) {
684 jinglePacket.setTo(id.with);
685 xmppConnectionService.sendIqPacket(id.account, jinglePacket, this::handleIqResponse);
686 }
687
688 private synchronized void handleIqResponse(final Account account, final IqPacket response) {
689 if (response.getType() == IqPacket.TYPE.ERROR) {
690 final String errorCondition = response.getErrorCondition();
691 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ-error from " + response.getFrom() + " in RTP session. " + errorCondition);
692 if (isTerminated()) {
693 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
694 return;
695 }
696 this.webRTCWrapper.close();
697 final State target;
698 if (Arrays.asList(
699 "service-unavailable",
700 "recipient-unavailable",
701 "remote-server-not-found",
702 "remote-server-timeout"
703 ).contains(errorCondition)) {
704 target = State.TERMINATED_CONNECTIVITY_ERROR;
705 } else {
706 target = State.TERMINATED_APPLICATION_FAILURE;
707 }
708 transitionOrThrow(target);
709 this.finish();
710 } else if (response.getType() == IqPacket.TYPE.TIMEOUT) {
711 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ timeout in RTP session with " + id.with + ". terminating with connectivity error");
712 if (isTerminated()) {
713 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
714 return;
715 }
716 this.webRTCWrapper.close();
717 transitionOrThrow(State.TERMINATED_CONNECTIVITY_ERROR);
718 this.finish();
719 }
720 }
721
722 private void terminateWithOutOfOrder(final JinglePacket jinglePacket) {
723 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": terminating session with out-of-order");
724 this.webRTCWrapper.close();
725 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
726 respondWithOutOfOrder(jinglePacket);
727 this.finish();
728 }
729
730 private void respondWithOutOfOrder(final JinglePacket jinglePacket) {
731 jingleConnectionManager.respondWithJingleError(id.account, jinglePacket, "out-of-order", "unexpected-request", "wait");
732 }
733
734 private void respondOk(final JinglePacket jinglePacket) {
735 xmppConnectionService.sendIqPacket(id.account, jinglePacket.generateResponse(IqPacket.TYPE.RESULT), null);
736 }
737
738 public RtpEndUserState getEndUserState() {
739 switch (this.state) {
740 case PROPOSED:
741 case SESSION_INITIALIZED:
742 if (isInitiator()) {
743 return RtpEndUserState.RINGING;
744 } else {
745 return RtpEndUserState.INCOMING_CALL;
746 }
747 case PROCEED:
748 if (isInitiator()) {
749 return RtpEndUserState.RINGING;
750 } else {
751 return RtpEndUserState.ACCEPTING_CALL;
752 }
753 case SESSION_INITIALIZED_PRE_APPROVED:
754 if (isInitiator()) {
755 return RtpEndUserState.RINGING;
756 } else {
757 return RtpEndUserState.CONNECTING;
758 }
759 case SESSION_ACCEPTED:
760 final PeerConnection.PeerConnectionState state = webRTCWrapper.getState();
761 if (state == PeerConnection.PeerConnectionState.CONNECTED) {
762 return RtpEndUserState.CONNECTED;
763 } else if (state == PeerConnection.PeerConnectionState.NEW || state == PeerConnection.PeerConnectionState.CONNECTING) {
764 return RtpEndUserState.CONNECTING;
765 } else if (state == PeerConnection.PeerConnectionState.CLOSED) {
766 return RtpEndUserState.ENDING_CALL;
767 } else {
768 return RtpEndUserState.CONNECTIVITY_ERROR;
769 }
770 case REJECTED:
771 case TERMINATED_DECLINED_OR_BUSY:
772 if (isInitiator()) {
773 return RtpEndUserState.DECLINED_OR_BUSY;
774 } else {
775 return RtpEndUserState.ENDED;
776 }
777 case TERMINATED_SUCCESS:
778 case ACCEPTED:
779 case RETRACTED:
780 case TERMINATED_CANCEL_OR_TIMEOUT:
781 return RtpEndUserState.ENDED;
782 case TERMINATED_CONNECTIVITY_ERROR:
783 return RtpEndUserState.CONNECTIVITY_ERROR;
784 case TERMINATED_APPLICATION_FAILURE:
785 return RtpEndUserState.APPLICATION_ERROR;
786 }
787 throw new IllegalStateException(String.format("%s has no equivalent EndUserState", this.state));
788 }
789
790 public Set<Media> getMedia() {
791 if (isInState(State.NULL)) {
792 throw new IllegalStateException("RTP connection has not been initialized yet");
793 }
794 if (isInState(State.PROPOSED, State.PROCEED)) {
795 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
796 }
797 final RtpContentMap initiatorContentMap = initiatorRtpContentMap;
798 if (initiatorContentMap != null) {
799 return initiatorContentMap.getMedia();
800 } else {
801 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
802 }
803 }
804
805
806 public synchronized void acceptCall() {
807 switch (this.state) {
808 case PROPOSED:
809 cancelRingingTimeout();
810 acceptCallFromProposed();
811 break;
812 case SESSION_INITIALIZED:
813 cancelRingingTimeout();
814 acceptCallFromSessionInitialized();
815 break;
816 case ACCEPTED:
817 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": the call has already been accepted with another client. UI was just lagging behind");
818 break;
819 case PROCEED:
820 case SESSION_ACCEPTED:
821 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": the call has already been accepted. user probably double tapped the UI");
822 break;
823 default:
824 throw new IllegalStateException("Can not accept call from " + this.state);
825 }
826 }
827
828 public synchronized void rejectCall() {
829 switch (this.state) {
830 case PROPOSED:
831 rejectCallFromProposed();
832 break;
833 case SESSION_INITIALIZED:
834 rejectCallFromSessionInitiate();
835 break;
836 default:
837 throw new IllegalStateException("Can not reject call from " + this.state);
838 }
839 }
840
841 public synchronized void endCall() {
842 if (isTerminated()) {
843 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": received endCall() when session has already been terminated. nothing to do");
844 return;
845 }
846 if (isInState(State.PROPOSED) && !isInitiator()) {
847 rejectCallFromProposed();
848 return;
849 }
850 if (isInState(State.PROCEED)) {
851 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ending call while in state PROCEED just means ending the connection");
852 this.jingleConnectionManager.endSession(id, State.TERMINATED_SUCCESS);
853 this.webRTCWrapper.close();
854 this.finish();
855 transitionOrThrow(State.TERMINATED_SUCCESS); //arguably this wasn't success; but not a real failure either
856 return;
857 }
858 if (isInitiator() && isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED)) {
859 this.webRTCWrapper.close();
860 sendSessionTerminate(Reason.CANCEL);
861 return;
862 }
863 if (isInState(State.SESSION_INITIALIZED)) {
864 rejectCallFromSessionInitiate();
865 return;
866 }
867 if (isInState(State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
868 this.webRTCWrapper.close();
869 sendSessionTerminate(Reason.SUCCESS);
870 return;
871 }
872 if (isInState(State.TERMINATED_APPLICATION_FAILURE, State.TERMINATED_CONNECTIVITY_ERROR, State.TERMINATED_DECLINED_OR_BUSY)) {
873 Log.d(Config.LOGTAG, "ignoring request to end call because already in state " + this.state);
874 return;
875 }
876 throw new IllegalStateException("called 'endCall' while in state " + this.state + ". isInitiator=" + isInitiator());
877 }
878
879 private void setupWebRTC(final Set<Media> media, final List<PeerConnection.IceServer> iceServers) throws WebRTCWrapper.InitializationException {
880 this.jingleConnectionManager.ensureConnectionIsRegistered(this);
881 final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference;
882 if (media.contains(Media.VIDEO)) {
883 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.SPEAKER;
884 } else {
885 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.EARPIECE;
886 }
887 this.webRTCWrapper.setup(this.xmppConnectionService, speakerPhonePreference);
888 this.webRTCWrapper.initializePeerConnection(media, iceServers);
889 }
890
891 private void acceptCallFromProposed() {
892 transitionOrThrow(State.PROCEED);
893 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
894 this.sendJingleMessage("accept", id.account.getJid().asBareJid());
895 this.sendJingleMessage("proceed");
896 }
897
898 private void rejectCallFromProposed() {
899 transitionOrThrow(State.REJECTED);
900 writeLogMessageMissed();
901 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
902 this.sendJingleMessage("reject");
903 finish();
904 }
905
906 private void rejectCallFromSessionInitiate() {
907 webRTCWrapper.close();
908 sendSessionTerminate(Reason.DECLINE);
909 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
910 }
911
912 private void sendJingleMessage(final String action) {
913 sendJingleMessage(action, id.with);
914 }
915
916 private void sendJingleMessage(final String action, final Jid to) {
917 final MessagePacket messagePacket = new MessagePacket();
918 if ("proceed".equals(action)) {
919 messagePacket.setId(JINGLE_MESSAGE_PROCEED_ID_PREFIX + id.sessionId);
920 }
921 messagePacket.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
922 messagePacket.setTo(to);
923 messagePacket.addChild(action, Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId);
924 messagePacket.addChild("store", "urn:xmpp:hints");
925 xmppConnectionService.sendMessagePacket(id.account, messagePacket);
926 }
927
928 private void acceptCallFromSessionInitialized() {
929 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
930 sendSessionAccept();
931 }
932
933 private synchronized boolean isInState(State... state) {
934 return Arrays.asList(state).contains(this.state);
935 }
936
937 private boolean transition(final State target) {
938 return transition(target, null);
939 }
940
941 private synchronized boolean transition(final State target, final Runnable runnable) {
942 final Collection<State> validTransitions = VALID_TRANSITIONS.get(this.state);
943 if (validTransitions != null && validTransitions.contains(target)) {
944 this.state = target;
945 if (runnable != null) {
946 runnable.run();
947 }
948 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target);
949 updateEndUserState();
950 updateOngoingCallNotification();
951 return true;
952 } else {
953 return false;
954 }
955 }
956
957 void transitionOrThrow(final State target) {
958 if (!transition(target)) {
959 throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target));
960 }
961 }
962
963 @Override
964 public void onIceCandidate(final IceCandidate iceCandidate) {
965 final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp);
966 Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString());
967 sendTransportInfo(iceCandidate.sdpMid, candidate);
968 }
969
970 @Override
971 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
972 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnectionState changed to " + newState);
973 if (newState == PeerConnection.PeerConnectionState.CONNECTED && this.rtpConnectionStarted == 0) {
974 this.rtpConnectionStarted = SystemClock.elapsedRealtime();
975 }
976 //TODO 'DISCONNECTED' might be an opportunity to renew the offer and send a transport-replace
977 //TODO exact syntax is yet to be determined but transport-replace sounds like the most reasonable
978 //as there is no content-replace
979 if (Arrays.asList(PeerConnection.PeerConnectionState.FAILED, PeerConnection.PeerConnectionState.DISCONNECTED).contains(newState)) {
980 if (isTerminated()) {
981 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": not sending session-terminate after connectivity error because session is already in state " + this.state);
982 return;
983 }
984 new Thread(this::closeWebRTCSessionAfterFailedConnection).start();
985 } else {
986 updateEndUserState();
987 }
988 }
989
990 private void closeWebRTCSessionAfterFailedConnection() {
991 this.webRTCWrapper.close();
992 synchronized (this) {
993 if (isTerminated()) {
994 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": no need to send session-terminate after failed connection. Other party already did");
995 return;
996 }
997 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
998 }
999 }
1000
1001 public AppRTCAudioManager getAudioManager() {
1002 return webRTCWrapper.getAudioManager();
1003 }
1004
1005 public boolean isMicrophoneEnabled() {
1006 return webRTCWrapper.isMicrophoneEnabled();
1007 }
1008
1009 public void setMicrophoneEnabled(final boolean enabled) {
1010 webRTCWrapper.setMicrophoneEnabled(enabled);
1011 }
1012
1013 public boolean isVideoEnabled() {
1014 return webRTCWrapper.isVideoEnabled();
1015 }
1016
1017 public void setVideoEnabled(final boolean enabled) {
1018 webRTCWrapper.setVideoEnabled(enabled);
1019 }
1020
1021 @Override
1022 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
1023 xmppConnectionService.notifyJingleRtpConnectionUpdate(selectedAudioDevice, availableAudioDevices);
1024 }
1025
1026 private void updateEndUserState() {
1027 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, getEndUserState());
1028 }
1029
1030 private void updateOngoingCallNotification() {
1031 if (STATES_SHOWING_ONGOING_CALL.contains(this.state)) {
1032 xmppConnectionService.setOngoingCall(id, getMedia());
1033 } else {
1034 xmppConnectionService.removeOngoingCall();
1035 }
1036 }
1037
1038 private void discoverIceServers(final OnIceServersDiscovered onIceServersDiscovered) {
1039 if (id.account.getXmppConnection().getFeatures().externalServiceDiscovery()) {
1040 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1041 request.setTo(Jid.of(id.account.getJid().getDomain()));
1042 request.addChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1043 xmppConnectionService.sendIqPacket(id.account, request, (account, response) -> {
1044 ImmutableList.Builder<PeerConnection.IceServer> listBuilder = new ImmutableList.Builder<>();
1045 if (response.getType() == IqPacket.TYPE.RESULT) {
1046 final Element services = response.findChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1047 final List<Element> children = services == null ? Collections.emptyList() : services.getChildren();
1048 for (final Element child : children) {
1049 if ("service".equals(child.getName())) {
1050 final String type = child.getAttribute("type");
1051 final String host = child.getAttribute("host");
1052 final String sport = child.getAttribute("port");
1053 final Integer port = sport == null ? null : Ints.tryParse(sport);
1054 final String transport = child.getAttribute("transport");
1055 final String username = child.getAttribute("username");
1056 final String password = child.getAttribute("password");
1057 if (Strings.isNullOrEmpty(host) || port == null) {
1058 continue;
1059 }
1060 if (port < 0 || port > 65535) {
1061 continue;
1062 }
1063 if (Arrays.asList("stun", "stuns", "turn", "turns").contains(type) && Arrays.asList("udp", "tcp").contains(transport)) {
1064 if (Arrays.asList("stuns", "turns").contains(type) && "udp".equals(transport)) {
1065 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping invalid combination of udp/tls in external services");
1066 continue;
1067 }
1068 //TODO wrap ipv6 addresses
1069 PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer.builder(String.format("%s:%s:%s?transport=%s", type, host, port, transport));
1070 if (username != null && password != null) {
1071 iceServerBuilder.setUsername(username);
1072 iceServerBuilder.setPassword(password);
1073 } else if (Arrays.asList("turn", "turns").contains(type)) {
1074 //The WebRTC spec requires throwing an InvalidAccessError when username (from libwebrtc source coder)
1075 //https://chromium.googlesource.com/external/webrtc/+/master/pc/ice_server_parsing.cc
1076 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping " + type + "/" + transport + " without username and password");
1077 continue;
1078 }
1079 final PeerConnection.IceServer iceServer = iceServerBuilder.createIceServer();
1080 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": discovered ICE Server: " + iceServer);
1081 listBuilder.add(iceServer);
1082 }
1083 }
1084 }
1085 }
1086 List<PeerConnection.IceServer> iceServers = listBuilder.build();
1087 if (iceServers.size() == 0) {
1088 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no ICE server found " + response);
1089 }
1090 onIceServersDiscovered.onIceServersDiscovered(iceServers);
1091 });
1092 } else {
1093 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": has no external service discovery");
1094 onIceServersDiscovered.onIceServersDiscovered(Collections.emptyList());
1095 }
1096 }
1097
1098 private void finish() {
1099 this.cancelRingingTimeout();
1100 this.webRTCWrapper.verifyClosed();
1101 this.jingleConnectionManager.finishConnection(this);
1102 }
1103
1104 private void writeLogMessage(final State state) {
1105 final long started = this.rtpConnectionStarted;
1106 long duration = started <= 0 ? 0 : SystemClock.elapsedRealtime() - started;
1107 if (state == State.TERMINATED_SUCCESS || (state == State.TERMINATED_CONNECTIVITY_ERROR && duration > 0)) {
1108 writeLogMessageSuccess(duration);
1109 } else {
1110 writeLogMessageMissed();
1111 }
1112 }
1113
1114 private void writeLogMessageSuccess(final long duration) {
1115 this.message.setBody(new RtpSessionStatus(true, duration).toString());
1116 this.writeMessage();
1117 }
1118
1119 private void writeLogMessageMissed() {
1120 this.message.setBody(new RtpSessionStatus(false, 0).toString());
1121 this.writeMessage();
1122 }
1123
1124 private void writeMessage() {
1125 final Conversational conversational = message.getConversation();
1126 if (conversational instanceof Conversation) {
1127 ((Conversation) conversational).add(this.message);
1128 xmppConnectionService.databaseBackend.createMessage(message);
1129 xmppConnectionService.updateConversationUi();
1130 } else {
1131 throw new IllegalStateException("Somehow the conversation in a message was a stub");
1132 }
1133 }
1134
1135 public State getState() {
1136 return this.state;
1137 }
1138
1139 public boolean isTerminated() {
1140 return TERMINATED.contains(this.state);
1141 }
1142
1143 public Optional<VideoTrack> geLocalVideoTrack() {
1144 return webRTCWrapper.getLocalVideoTrack();
1145 }
1146
1147 public Optional<VideoTrack> getRemoteVideoTrack() {
1148 return webRTCWrapper.getRemoteVideoTrack();
1149 }
1150
1151
1152 public EglBase.Context getEglBaseContext() {
1153 return webRTCWrapper.getEglBaseContext();
1154 }
1155
1156 void setProposedMedia(final Set<Media> media) {
1157 this.proposedMedia = media;
1158 }
1159
1160 private interface OnIceServersDiscovered {
1161 void onIceServersDiscovered(List<PeerConnection.IceServer> iceServers);
1162 }
1163}