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 previous = this.state;
661 final State target = reasonToState(reason);
662 transitionOrThrow(target);
663 if (previous != State.NULL) {
664 writeLogMessage(target);
665 }
666 final JinglePacket jinglePacket = new JinglePacket(JinglePacket.Action.SESSION_TERMINATE, id.sessionId);
667 jinglePacket.setReason(reason, text);
668 Log.d(Config.LOGTAG, jinglePacket.toString());
669 send(jinglePacket);
670 finish();
671 }
672
673 private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) {
674 final RtpContentMap transportInfo;
675 try {
676 final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap;
677 transportInfo = rtpContentMap.transportInfo(contentName, candidate);
678 } catch (final Exception e) {
679 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName);
680 return;
681 }
682 final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId);
683 send(jinglePacket);
684 }
685
686 private void send(final JinglePacket jinglePacket) {
687 jinglePacket.setTo(id.with);
688 xmppConnectionService.sendIqPacket(id.account, jinglePacket, this::handleIqResponse);
689 }
690
691 private synchronized void handleIqResponse(final Account account, final IqPacket response) {
692 if (response.getType() == IqPacket.TYPE.ERROR) {
693 final String errorCondition = response.getErrorCondition();
694 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ-error from " + response.getFrom() + " in RTP session. " + errorCondition);
695 if (isTerminated()) {
696 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
697 return;
698 }
699 this.webRTCWrapper.close();
700 final State target;
701 if (Arrays.asList(
702 "service-unavailable",
703 "recipient-unavailable",
704 "remote-server-not-found",
705 "remote-server-timeout"
706 ).contains(errorCondition)) {
707 target = State.TERMINATED_CONNECTIVITY_ERROR;
708 } else {
709 target = State.TERMINATED_APPLICATION_FAILURE;
710 }
711 transitionOrThrow(target);
712 this.finish();
713 } else if (response.getType() == IqPacket.TYPE.TIMEOUT) {
714 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received IQ timeout in RTP session with " + id.with + ". terminating with connectivity error");
715 if (isTerminated()) {
716 Log.i(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring error because session was already terminated");
717 return;
718 }
719 this.webRTCWrapper.close();
720 transitionOrThrow(State.TERMINATED_CONNECTIVITY_ERROR);
721 this.finish();
722 }
723 }
724
725 private void terminateWithOutOfOrder(final JinglePacket jinglePacket) {
726 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": terminating session with out-of-order");
727 this.webRTCWrapper.close();
728 transitionOrThrow(State.TERMINATED_APPLICATION_FAILURE);
729 respondWithOutOfOrder(jinglePacket);
730 this.finish();
731 }
732
733 private void respondWithOutOfOrder(final JinglePacket jinglePacket) {
734 jingleConnectionManager.respondWithJingleError(id.account, jinglePacket, "out-of-order", "unexpected-request", "wait");
735 }
736
737 private void respondOk(final JinglePacket jinglePacket) {
738 xmppConnectionService.sendIqPacket(id.account, jinglePacket.generateResponse(IqPacket.TYPE.RESULT), null);
739 }
740
741 public RtpEndUserState getEndUserState() {
742 switch (this.state) {
743 case PROPOSED:
744 case SESSION_INITIALIZED:
745 if (isInitiator()) {
746 return RtpEndUserState.RINGING;
747 } else {
748 return RtpEndUserState.INCOMING_CALL;
749 }
750 case PROCEED:
751 if (isInitiator()) {
752 return RtpEndUserState.RINGING;
753 } else {
754 return RtpEndUserState.ACCEPTING_CALL;
755 }
756 case SESSION_INITIALIZED_PRE_APPROVED:
757 if (isInitiator()) {
758 return RtpEndUserState.RINGING;
759 } else {
760 return RtpEndUserState.CONNECTING;
761 }
762 case SESSION_ACCEPTED:
763 final PeerConnection.PeerConnectionState state = webRTCWrapper.getState();
764 if (state == PeerConnection.PeerConnectionState.CONNECTED) {
765 return RtpEndUserState.CONNECTED;
766 } else if (state == PeerConnection.PeerConnectionState.NEW || state == PeerConnection.PeerConnectionState.CONNECTING) {
767 return RtpEndUserState.CONNECTING;
768 } else if (state == PeerConnection.PeerConnectionState.CLOSED) {
769 return RtpEndUserState.ENDING_CALL;
770 } else {
771 return RtpEndUserState.CONNECTIVITY_ERROR;
772 }
773 case REJECTED:
774 case TERMINATED_DECLINED_OR_BUSY:
775 if (isInitiator()) {
776 return RtpEndUserState.DECLINED_OR_BUSY;
777 } else {
778 return RtpEndUserState.ENDED;
779 }
780 case TERMINATED_SUCCESS:
781 case ACCEPTED:
782 case RETRACTED:
783 case TERMINATED_CANCEL_OR_TIMEOUT:
784 return RtpEndUserState.ENDED;
785 case TERMINATED_CONNECTIVITY_ERROR:
786 return RtpEndUserState.CONNECTIVITY_ERROR;
787 case TERMINATED_APPLICATION_FAILURE:
788 return RtpEndUserState.APPLICATION_ERROR;
789 }
790 throw new IllegalStateException(String.format("%s has no equivalent EndUserState", this.state));
791 }
792
793 public Set<Media> getMedia() {
794 if (isInState(State.NULL)) {
795 throw new IllegalStateException("RTP connection has not been initialized yet");
796 }
797 if (isInState(State.PROPOSED, State.PROCEED)) {
798 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
799 }
800 final RtpContentMap initiatorContentMap = initiatorRtpContentMap;
801 if (initiatorContentMap != null) {
802 return initiatorContentMap.getMedia();
803 } else {
804 return Preconditions.checkNotNull(this.proposedMedia, "RTP connection has not been initialized properly");
805 }
806 }
807
808
809 public synchronized void acceptCall() {
810 switch (this.state) {
811 case PROPOSED:
812 cancelRingingTimeout();
813 acceptCallFromProposed();
814 break;
815 case SESSION_INITIALIZED:
816 cancelRingingTimeout();
817 acceptCallFromSessionInitialized();
818 break;
819 case ACCEPTED:
820 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": the call has already been accepted with another client. UI was just lagging behind");
821 break;
822 case PROCEED:
823 case SESSION_ACCEPTED:
824 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": the call has already been accepted. user probably double tapped the UI");
825 break;
826 default:
827 throw new IllegalStateException("Can not accept call from " + this.state);
828 }
829 }
830
831 public synchronized void rejectCall() {
832 switch (this.state) {
833 case PROPOSED:
834 rejectCallFromProposed();
835 break;
836 case SESSION_INITIALIZED:
837 rejectCallFromSessionInitiate();
838 break;
839 default:
840 throw new IllegalStateException("Can not reject call from " + this.state);
841 }
842 }
843
844 public synchronized void endCall() {
845 if (isTerminated()) {
846 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": received endCall() when session has already been terminated. nothing to do");
847 return;
848 }
849 if (isInState(State.PROPOSED) && !isInitiator()) {
850 rejectCallFromProposed();
851 return;
852 }
853 if (isInState(State.PROCEED)) {
854 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ending call while in state PROCEED just means ending the connection");
855 this.jingleConnectionManager.endSession(id, State.TERMINATED_SUCCESS);
856 this.webRTCWrapper.close();
857 this.finish();
858 transitionOrThrow(State.TERMINATED_SUCCESS); //arguably this wasn't success; but not a real failure either
859 return;
860 }
861 if (isInitiator() && isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED)) {
862 this.webRTCWrapper.close();
863 sendSessionTerminate(Reason.CANCEL);
864 return;
865 }
866 if (isInState(State.SESSION_INITIALIZED)) {
867 rejectCallFromSessionInitiate();
868 return;
869 }
870 if (isInState(State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
871 this.webRTCWrapper.close();
872 sendSessionTerminate(Reason.SUCCESS);
873 return;
874 }
875 if (isInState(State.TERMINATED_APPLICATION_FAILURE, State.TERMINATED_CONNECTIVITY_ERROR, State.TERMINATED_DECLINED_OR_BUSY)) {
876 Log.d(Config.LOGTAG, "ignoring request to end call because already in state " + this.state);
877 return;
878 }
879 throw new IllegalStateException("called 'endCall' while in state " + this.state + ". isInitiator=" + isInitiator());
880 }
881
882 private void setupWebRTC(final Set<Media> media, final List<PeerConnection.IceServer> iceServers) throws WebRTCWrapper.InitializationException {
883 this.jingleConnectionManager.ensureConnectionIsRegistered(this);
884 final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference;
885 if (media.contains(Media.VIDEO)) {
886 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.SPEAKER;
887 } else {
888 speakerPhonePreference = AppRTCAudioManager.SpeakerPhonePreference.EARPIECE;
889 }
890 this.webRTCWrapper.setup(this.xmppConnectionService, speakerPhonePreference);
891 this.webRTCWrapper.initializePeerConnection(media, iceServers);
892 }
893
894 private void acceptCallFromProposed() {
895 transitionOrThrow(State.PROCEED);
896 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
897 this.sendJingleMessage("accept", id.account.getJid().asBareJid());
898 this.sendJingleMessage("proceed");
899 }
900
901 private void rejectCallFromProposed() {
902 transitionOrThrow(State.REJECTED);
903 writeLogMessageMissed();
904 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
905 this.sendJingleMessage("reject");
906 finish();
907 }
908
909 private void rejectCallFromSessionInitiate() {
910 webRTCWrapper.close();
911 sendSessionTerminate(Reason.DECLINE);
912 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
913 }
914
915 private void sendJingleMessage(final String action) {
916 sendJingleMessage(action, id.with);
917 }
918
919 private void sendJingleMessage(final String action, final Jid to) {
920 final MessagePacket messagePacket = new MessagePacket();
921 if ("proceed".equals(action)) {
922 messagePacket.setId(JINGLE_MESSAGE_PROCEED_ID_PREFIX + id.sessionId);
923 }
924 messagePacket.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
925 messagePacket.setTo(to);
926 messagePacket.addChild(action, Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId);
927 messagePacket.addChild("store", "urn:xmpp:hints");
928 xmppConnectionService.sendMessagePacket(id.account, messagePacket);
929 }
930
931 private void acceptCallFromSessionInitialized() {
932 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
933 sendSessionAccept();
934 }
935
936 private synchronized boolean isInState(State... state) {
937 return Arrays.asList(state).contains(this.state);
938 }
939
940 private boolean transition(final State target) {
941 return transition(target, null);
942 }
943
944 private synchronized boolean transition(final State target, final Runnable runnable) {
945 final Collection<State> validTransitions = VALID_TRANSITIONS.get(this.state);
946 if (validTransitions != null && validTransitions.contains(target)) {
947 this.state = target;
948 if (runnable != null) {
949 runnable.run();
950 }
951 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target);
952 updateEndUserState();
953 updateOngoingCallNotification();
954 return true;
955 } else {
956 return false;
957 }
958 }
959
960 void transitionOrThrow(final State target) {
961 if (!transition(target)) {
962 throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target));
963 }
964 }
965
966 @Override
967 public void onIceCandidate(final IceCandidate iceCandidate) {
968 final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp);
969 Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString());
970 sendTransportInfo(iceCandidate.sdpMid, candidate);
971 }
972
973 @Override
974 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
975 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnectionState changed to " + newState);
976 if (newState == PeerConnection.PeerConnectionState.CONNECTED && this.rtpConnectionStarted == 0) {
977 this.rtpConnectionStarted = SystemClock.elapsedRealtime();
978 }
979 //TODO 'DISCONNECTED' might be an opportunity to renew the offer and send a transport-replace
980 //TODO exact syntax is yet to be determined but transport-replace sounds like the most reasonable
981 //as there is no content-replace
982 if (Arrays.asList(PeerConnection.PeerConnectionState.FAILED, PeerConnection.PeerConnectionState.DISCONNECTED).contains(newState)) {
983 if (isTerminated()) {
984 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": not sending session-terminate after connectivity error because session is already in state " + this.state);
985 return;
986 }
987 new Thread(this::closeWebRTCSessionAfterFailedConnection).start();
988 } else {
989 updateEndUserState();
990 }
991 }
992
993 private void closeWebRTCSessionAfterFailedConnection() {
994 this.webRTCWrapper.close();
995 synchronized (this) {
996 if (isTerminated()) {
997 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": no need to send session-terminate after failed connection. Other party already did");
998 return;
999 }
1000 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
1001 }
1002 }
1003
1004 public AppRTCAudioManager getAudioManager() {
1005 return webRTCWrapper.getAudioManager();
1006 }
1007
1008 public boolean isMicrophoneEnabled() {
1009 return webRTCWrapper.isMicrophoneEnabled();
1010 }
1011
1012 public void setMicrophoneEnabled(final boolean enabled) {
1013 webRTCWrapper.setMicrophoneEnabled(enabled);
1014 }
1015
1016 public boolean isVideoEnabled() {
1017 return webRTCWrapper.isVideoEnabled();
1018 }
1019
1020 public void setVideoEnabled(final boolean enabled) {
1021 webRTCWrapper.setVideoEnabled(enabled);
1022 }
1023
1024 @Override
1025 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
1026 xmppConnectionService.notifyJingleRtpConnectionUpdate(selectedAudioDevice, availableAudioDevices);
1027 }
1028
1029 private void updateEndUserState() {
1030 final RtpEndUserState endUserState = getEndUserState();
1031 final RtpContentMap contentMap = initiatorRtpContentMap;
1032 final Set<Media> media = contentMap == null ? Collections.emptySet() : contentMap.getMedia();
1033 jingleConnectionManager.toneManager.transition(isInitiator(), endUserState, media);
1034 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, endUserState);
1035 }
1036
1037 private void updateOngoingCallNotification() {
1038 if (STATES_SHOWING_ONGOING_CALL.contains(this.state)) {
1039 xmppConnectionService.setOngoingCall(id, getMedia());
1040 } else {
1041 xmppConnectionService.removeOngoingCall();
1042 }
1043 }
1044
1045 private void discoverIceServers(final OnIceServersDiscovered onIceServersDiscovered) {
1046 if (id.account.getXmppConnection().getFeatures().externalServiceDiscovery()) {
1047 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1048 request.setTo(Jid.of(id.account.getJid().getDomain()));
1049 request.addChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1050 xmppConnectionService.sendIqPacket(id.account, request, (account, response) -> {
1051 ImmutableList.Builder<PeerConnection.IceServer> listBuilder = new ImmutableList.Builder<>();
1052 if (response.getType() == IqPacket.TYPE.RESULT) {
1053 final Element services = response.findChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
1054 final List<Element> children = services == null ? Collections.emptyList() : services.getChildren();
1055 for (final Element child : children) {
1056 if ("service".equals(child.getName())) {
1057 final String type = child.getAttribute("type");
1058 final String host = child.getAttribute("host");
1059 final String sport = child.getAttribute("port");
1060 final Integer port = sport == null ? null : Ints.tryParse(sport);
1061 final String transport = child.getAttribute("transport");
1062 final String username = child.getAttribute("username");
1063 final String password = child.getAttribute("password");
1064 if (Strings.isNullOrEmpty(host) || port == null) {
1065 continue;
1066 }
1067 if (port < 0 || port > 65535) {
1068 continue;
1069 }
1070 if (Arrays.asList("stun", "stuns", "turn", "turns").contains(type) && Arrays.asList("udp", "tcp").contains(transport)) {
1071 if (Arrays.asList("stuns", "turns").contains(type) && "udp".equals(transport)) {
1072 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping invalid combination of udp/tls in external services");
1073 continue;
1074 }
1075 //TODO wrap ipv6 addresses
1076 PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer.builder(String.format("%s:%s:%s?transport=%s", type, host, port, transport));
1077 if (username != null && password != null) {
1078 iceServerBuilder.setUsername(username);
1079 iceServerBuilder.setPassword(password);
1080 } else if (Arrays.asList("turn", "turns").contains(type)) {
1081 //The WebRTC spec requires throwing an InvalidAccessError when username (from libwebrtc source coder)
1082 //https://chromium.googlesource.com/external/webrtc/+/master/pc/ice_server_parsing.cc
1083 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping " + type + "/" + transport + " without username and password");
1084 continue;
1085 }
1086 final PeerConnection.IceServer iceServer = iceServerBuilder.createIceServer();
1087 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": discovered ICE Server: " + iceServer);
1088 listBuilder.add(iceServer);
1089 }
1090 }
1091 }
1092 }
1093 List<PeerConnection.IceServer> iceServers = listBuilder.build();
1094 if (iceServers.size() == 0) {
1095 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no ICE server found " + response);
1096 }
1097 onIceServersDiscovered.onIceServersDiscovered(iceServers);
1098 });
1099 } else {
1100 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": has no external service discovery");
1101 onIceServersDiscovered.onIceServersDiscovered(Collections.emptyList());
1102 }
1103 }
1104
1105 private void finish() {
1106 this.cancelRingingTimeout();
1107 this.webRTCWrapper.verifyClosed();
1108 this.jingleConnectionManager.finishConnection(this);
1109 }
1110
1111 private void writeLogMessage(final State state) {
1112 final long started = this.rtpConnectionStarted;
1113 long duration = started <= 0 ? 0 : SystemClock.elapsedRealtime() - started;
1114 if (state == State.TERMINATED_SUCCESS || (state == State.TERMINATED_CONNECTIVITY_ERROR && duration > 0)) {
1115 writeLogMessageSuccess(duration);
1116 } else {
1117 writeLogMessageMissed();
1118 }
1119 }
1120
1121 private void writeLogMessageSuccess(final long duration) {
1122 this.message.setBody(new RtpSessionStatus(true, duration).toString());
1123 this.writeMessage();
1124 }
1125
1126 private void writeLogMessageMissed() {
1127 this.message.setBody(new RtpSessionStatus(false, 0).toString());
1128 this.writeMessage();
1129 }
1130
1131 private void writeMessage() {
1132 final Conversational conversational = message.getConversation();
1133 if (conversational instanceof Conversation) {
1134 ((Conversation) conversational).add(this.message);
1135 xmppConnectionService.databaseBackend.createMessage(message);
1136 xmppConnectionService.updateConversationUi();
1137 } else {
1138 throw new IllegalStateException("Somehow the conversation in a message was a stub");
1139 }
1140 }
1141
1142 public State getState() {
1143 return this.state;
1144 }
1145
1146 public boolean isTerminated() {
1147 return TERMINATED.contains(this.state);
1148 }
1149
1150 public Optional<VideoTrack> geLocalVideoTrack() {
1151 return webRTCWrapper.getLocalVideoTrack();
1152 }
1153
1154 public Optional<VideoTrack> getRemoteVideoTrack() {
1155 return webRTCWrapper.getRemoteVideoTrack();
1156 }
1157
1158
1159 public EglBase.Context getEglBaseContext() {
1160 return webRTCWrapper.getEglBaseContext();
1161 }
1162
1163 void setProposedMedia(final Set<Media> media) {
1164 this.proposedMedia = media;
1165 }
1166
1167 private interface OnIceServersDiscovered {
1168 void onIceServersDiscovered(List<PeerConnection.IceServer> iceServers);
1169 }
1170}