1package eu.siacs.conversations.xmpp.jingle;
2
3import android.util.Log;
4
5import com.google.common.base.Strings;
6import com.google.common.collect.ImmutableList;
7import com.google.common.collect.ImmutableMap;
8import com.google.common.primitives.Ints;
9
10import org.webrtc.IceCandidate;
11import org.webrtc.PeerConnection;
12
13import java.util.ArrayDeque;
14import java.util.Arrays;
15import java.util.Collection;
16import java.util.Collections;
17import java.util.List;
18import java.util.Map;
19
20import eu.siacs.conversations.Config;
21import eu.siacs.conversations.xml.Element;
22import eu.siacs.conversations.xml.Namespace;
23import eu.siacs.conversations.xmpp.jingle.stanzas.Group;
24import eu.siacs.conversations.xmpp.jingle.stanzas.IceUdpTransportInfo;
25import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
26import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
27import eu.siacs.conversations.xmpp.stanzas.IqPacket;
28import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
29import rocks.xmpp.addr.Jid;
30
31public class JingleRtpConnection extends AbstractJingleConnection implements WebRTCWrapper.EventCallback {
32
33 private static final Map<State, Collection<State>> VALID_TRANSITIONS;
34
35 static {
36 final ImmutableMap.Builder<State, Collection<State>> transitionBuilder = new ImmutableMap.Builder<>();
37 transitionBuilder.put(State.NULL, ImmutableList.of(State.PROPOSED, State.SESSION_INITIALIZED));
38 transitionBuilder.put(State.PROPOSED, ImmutableList.of(State.ACCEPTED, State.PROCEED, State.REJECTED, State.RETRACTED));
39 transitionBuilder.put(State.PROCEED, ImmutableList.of(State.SESSION_INITIALIZED_PRE_APPROVED, State.TERMINATED_SUCCESS));
40 transitionBuilder.put(State.SESSION_INITIALIZED, ImmutableList.of(State.SESSION_ACCEPTED, State.TERMINATED_CANCEL_OR_TIMEOUT, State.TERMINATED_DECLINED_OR_BUSY));
41 transitionBuilder.put(State.SESSION_INITIALIZED_PRE_APPROVED, ImmutableList.of(State.SESSION_ACCEPTED, State.TERMINATED_CANCEL_OR_TIMEOUT, State.TERMINATED_DECLINED_OR_BUSY));
42 transitionBuilder.put(State.SESSION_ACCEPTED, ImmutableList.of(State.TERMINATED_SUCCESS, State.TERMINATED_CONNECTIVITY_ERROR));
43 VALID_TRANSITIONS = transitionBuilder.build();
44 }
45
46 private final WebRTCWrapper webRTCWrapper = new WebRTCWrapper(this);
47 private final ArrayDeque<IceCandidate> pendingIceCandidates = new ArrayDeque<>();
48 private State state = State.NULL;
49 private RtpContentMap initiatorRtpContentMap;
50 private RtpContentMap responderRtpContentMap;
51
52
53 public JingleRtpConnection(JingleConnectionManager jingleConnectionManager, Id id, Jid initiator) {
54 super(jingleConnectionManager, id, initiator);
55 }
56
57 private static State reasonToState(Reason reason) {
58 switch (reason) {
59 case SUCCESS:
60 return State.TERMINATED_SUCCESS;
61 case DECLINE:
62 case BUSY:
63 return State.TERMINATED_DECLINED_OR_BUSY;
64 case CANCEL:
65 case TIMEOUT:
66 return State.TERMINATED_CANCEL_OR_TIMEOUT;
67 default:
68 return State.TERMINATED_CONNECTIVITY_ERROR;
69 }
70 }
71
72 @Override
73 void deliverPacket(final JinglePacket jinglePacket) {
74 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": packet delivered to JingleRtpConnection");
75 switch (jinglePacket.getAction()) {
76 case SESSION_INITIATE:
77 receiveSessionInitiate(jinglePacket);
78 break;
79 case TRANSPORT_INFO:
80 receiveTransportInfo(jinglePacket);
81 break;
82 case SESSION_ACCEPT:
83 receiveSessionAccept(jinglePacket);
84 break;
85 case SESSION_TERMINATE:
86 receiveSessionTerminate(jinglePacket);
87 break;
88 default:
89 Log.d(Config.LOGTAG, String.format("%s: received unhandled jingle action %s", id.account.getJid().asBareJid(), jinglePacket.getAction()));
90 break;
91 }
92 }
93
94 private void receiveSessionTerminate(final JinglePacket jinglePacket) {
95 final Reason reason = jinglePacket.getReason();
96 final State previous = this.state;
97 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received session terminate reason=" + reason + " while in state " + previous);
98 webRTCWrapper.close();
99 transitionOrThrow(reasonToState(reason));
100 if (previous == State.PROPOSED || previous == State.SESSION_INITIALIZED) {
101 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
102 }
103 jingleConnectionManager.finishConnection(this);
104 }
105
106 private void receiveTransportInfo(final JinglePacket jinglePacket) {
107 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
108 final RtpContentMap contentMap;
109 try {
110 contentMap = RtpContentMap.of(jinglePacket);
111 } catch (IllegalArgumentException | NullPointerException e) {
112 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
113 return;
114 }
115 final RtpContentMap rtpContentMap = isInitiator() ? this.responderRtpContentMap : this.initiatorRtpContentMap;
116 final Group originalGroup = rtpContentMap != null ? rtpContentMap.group : null;
117 final List<String> identificationTags = originalGroup == null ? Collections.emptyList() : originalGroup.getIdentificationTags();
118 if (identificationTags.size() == 0) {
119 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no identification tags found in initial offer. we won't be able to calculate mLineIndices");
120 }
121 for (final Map.Entry<String, RtpContentMap.DescriptionTransport> content : contentMap.contents.entrySet()) {
122 final String ufrag = content.getValue().transport.getAttribute("ufrag");
123 for (final IceUdpTransportInfo.Candidate candidate : content.getValue().transport.getCandidates()) {
124 final String sdp = candidate.toSdpAttribute(ufrag);
125 final String sdpMid = content.getKey();
126 final int mLineIndex = identificationTags.indexOf(sdpMid);
127 final IceCandidate iceCandidate = new IceCandidate(sdpMid, mLineIndex, sdp);
128 if (isInState(State.SESSION_ACCEPTED)) {
129 Log.d(Config.LOGTAG, "received candidate: " + iceCandidate);
130 this.webRTCWrapper.addIceCandidate(iceCandidate);
131 } else {
132 this.pendingIceCandidates.offer(iceCandidate);
133 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": put ICE candidate on backlog");
134 }
135 }
136 }
137 } else {
138 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received transport info while in state=" + this.state);
139 }
140 }
141
142 private void receiveSessionInitiate(final JinglePacket jinglePacket) {
143 if (isInitiator()) {
144 Log.d(Config.LOGTAG, String.format("%s: received session-initiate even though we were initiating", id.account.getJid().asBareJid()));
145 //TODO respond with out-of-order
146 return;
147 }
148 final RtpContentMap contentMap;
149 try {
150 contentMap = RtpContentMap.of(jinglePacket);
151 contentMap.requireContentDescriptions();
152 } catch (IllegalArgumentException | IllegalStateException | NullPointerException e) {
153 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
154 return;
155 }
156 Log.d(Config.LOGTAG, "processing session-init with " + contentMap.contents.size() + " contents");
157 final State target;
158 if (this.state == State.PROCEED) {
159 target = State.SESSION_INITIALIZED_PRE_APPROVED;
160 } else {
161 target = State.SESSION_INITIALIZED;
162 }
163 if (transition(target)) {
164 this.initiatorRtpContentMap = contentMap;
165 if (target == State.SESSION_INITIALIZED_PRE_APPROVED) {
166 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": automatically accepting session-initiate");
167 sendSessionAccept();
168 } else {
169 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received not pre-approved session-initiate. start ringing");
170 startRinging();
171 }
172 } else {
173 Log.d(Config.LOGTAG, String.format("%s: received session-initiate while in state %s", id.account.getJid().asBareJid(), state));
174 }
175 }
176
177 private void receiveSessionAccept(final JinglePacket jinglePacket) {
178 if (!isInitiator()) {
179 Log.d(Config.LOGTAG, String.format("%s: received session-accept even though we were responding", id.account.getJid().asBareJid()));
180 //TODO respond with out-of-order
181 return;
182 }
183 final RtpContentMap contentMap;
184 try {
185 contentMap = RtpContentMap.of(jinglePacket);
186 contentMap.requireContentDescriptions();
187 } catch (IllegalArgumentException | IllegalStateException | NullPointerException e) {
188 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
189 return;
190 }
191 Log.d(Config.LOGTAG, "processing session-accept with " + contentMap.contents.size() + " contents");
192 if (transition(State.SESSION_ACCEPTED)) {
193 receiveSessionAccept(contentMap);
194 } else {
195 Log.d(Config.LOGTAG, String.format("%s: received session-accept while in state %s", id.account.getJid().asBareJid(), state));
196 //TODO out-of-order
197 }
198 }
199
200 private void receiveSessionAccept(final RtpContentMap contentMap) {
201 this.responderRtpContentMap = contentMap;
202 org.webrtc.SessionDescription answer = new org.webrtc.SessionDescription(
203 org.webrtc.SessionDescription.Type.ANSWER,
204 SessionDescription.of(contentMap).toString()
205 );
206 try {
207 this.webRTCWrapper.setRemoteDescription(answer).get();
208 } catch (Exception e) {
209 Log.d(Config.LOGTAG, "unable to receive session accept", e);
210 }
211 }
212
213 private void sendSessionAccept() {
214 final RtpContentMap rtpContentMap = this.initiatorRtpContentMap;
215 if (rtpContentMap == null) {
216 throw new IllegalStateException("initiator RTP Content Map has not been set");
217 }
218 final SessionDescription offer;
219 try {
220 offer = SessionDescription.of(rtpContentMap);
221 } catch (final IllegalArgumentException e) {
222 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to process offer", e);
223 //TODO terminate session with application error
224 return;
225 }
226 sendSessionAccept(offer);
227 }
228
229 private void sendSessionAccept(SessionDescription offer) {
230 discoverIceServers(iceServers -> {
231 setupWebRTC(iceServers);
232 final org.webrtc.SessionDescription sdp = new org.webrtc.SessionDescription(
233 org.webrtc.SessionDescription.Type.OFFER,
234 offer.toString()
235 );
236 try {
237 this.webRTCWrapper.setRemoteDescription(sdp).get();
238 addIceCandidatesFromBlackLog();
239 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createAnswer().get();
240 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
241 final RtpContentMap respondingRtpContentMap = RtpContentMap.of(sessionDescription);
242 sendSessionAccept(respondingRtpContentMap);
243 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription);
244 } catch (Exception e) {
245 Log.d(Config.LOGTAG, "unable to send session accept", e);
246
247 }
248 });
249 }
250
251 private void addIceCandidatesFromBlackLog() {
252 while (!this.pendingIceCandidates.isEmpty()) {
253 final IceCandidate iceCandidate = this.pendingIceCandidates.poll();
254 this.webRTCWrapper.addIceCandidate(iceCandidate);
255 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": added ICE candidate from back log " + iceCandidate);
256 }
257 }
258
259 private void sendSessionAccept(final RtpContentMap rtpContentMap) {
260 this.responderRtpContentMap = rtpContentMap;
261 this.transitionOrThrow(State.SESSION_ACCEPTED);
262 final JinglePacket sessionAccept = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_ACCEPT, id.sessionId);
263 Log.d(Config.LOGTAG, sessionAccept.toString());
264 send(sessionAccept);
265 }
266
267 void deliveryMessage(final Jid from, final Element message) {
268 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": delivered message to JingleRtpConnection " + message);
269 switch (message.getName()) {
270 case "propose":
271 receivePropose(from, message);
272 break;
273 case "proceed":
274 receiveProceed(from, message);
275 break;
276 case "retract":
277 receiveRetract(from, message);
278 break;
279 case "reject":
280 receiveReject(from, message);
281 break;
282 case "accept":
283 receiveAccept(from, message);
284 break;
285 default:
286 break;
287 }
288 }
289
290 private void receiveAccept(Jid from, Element message) {
291 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
292 if (originatedFromMyself) {
293 if (transition(State.ACCEPTED)) {
294 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
295 this.jingleConnectionManager.finishConnection(this);
296 } else {
297 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to transition to accept because already in state=" + this.state);
298 }
299 } else {
300 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring 'accept' from " + from);
301 }
302 }
303
304 private void receiveReject(Jid from, Element message) {
305 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
306 //reject from another one of my clients
307 if (originatedFromMyself) {
308 if (transition(State.REJECTED)) {
309 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
310 this.jingleConnectionManager.finishConnection(this);
311 } else {
312 Log.d(Config.LOGTAG, "not able to transition into REJECTED because already in " + this.state);
313 }
314 } else {
315 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring reject from " + from + " for session with " + id.with);
316 }
317 }
318
319 private void receivePropose(final Jid from, final Element propose) {
320 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
321 //TODO we can use initiator logic here
322 if (originatedFromMyself) {
323 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": saw proposal from mysql. ignoring");
324 } else if (transition(State.PROPOSED)) {
325 startRinging();
326 } else {
327 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring session proposal because already in " + state);
328 }
329 }
330
331 private void startRinging() {
332 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received call from " + id.with + ". start ringing");
333 xmppConnectionService.getNotificationService().showIncomingCallNotification(id);
334 }
335
336 private void receiveProceed(final Jid from, final Element proceed) {
337 if (from.equals(id.with)) {
338 if (isInitiator()) {
339 if (transition(State.PROCEED)) {
340 this.sendSessionInitiate(State.SESSION_INITIALIZED_PRE_APPROVED);
341 } else {
342 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because already in %s", id.account.getJid().asBareJid(), this.state));
343 }
344 } else {
345 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because we were not initializing", id.account.getJid().asBareJid()));
346 }
347 } else if (from.asBareJid().equals(id.account.getJid().asBareJid())) {
348 if (transition(State.ACCEPTED)) {
349 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": moved session with " + id.with + " into state accepted after received carbon copied procced");
350 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
351 this.jingleConnectionManager.finishConnection(this);
352 }
353 } else {
354 //TODO a carbon copied proceed from another client of mine has the same logic as `accept`
355 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed from %s. was expected from %s", id.account.getJid().asBareJid(), from, id.with));
356 }
357 }
358
359 private void receiveRetract(final Jid from, final Element retract) {
360 if (from.equals(id.with)) {
361 if (transition(State.RETRACTED)) {
362 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
363 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": session with " + id.with + " has been retracted");
364 //TODO create missed call notification/message
365 jingleConnectionManager.finishConnection(this);
366 } else {
367 Log.d(Config.LOGTAG, "ignoring retract because already in " + this.state);
368 }
369 } else {
370 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received retract from " + from + ". expected retract from" + id.with + ". ignoring");
371 }
372 }
373
374 private void sendSessionInitiate(final State targetState) {
375 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": prepare session-initiate");
376 discoverIceServers(iceServers -> {
377 setupWebRTC(iceServers);
378 try {
379 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createOffer().get();
380 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
381 Log.d(Config.LOGTAG, "description: " + webRTCSessionDescription.description);
382 final RtpContentMap rtpContentMap = RtpContentMap.of(sessionDescription);
383 sendSessionInitiate(rtpContentMap, targetState);
384 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get();
385 } catch (Exception e) {
386 Log.d(Config.LOGTAG, "unable to sendSessionInitiate", e);
387 }
388 });
389 }
390
391 private void sendSessionInitiate(RtpContentMap rtpContentMap, final State targetState) {
392 this.initiatorRtpContentMap = rtpContentMap;
393 this.transitionOrThrow(targetState);
394 final JinglePacket sessionInitiate = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_INITIATE, id.sessionId);
395 Log.d(Config.LOGTAG, sessionInitiate.toString());
396 send(sessionInitiate);
397 }
398
399 private void sendSessionTerminate(final Reason reason) {
400 final State target = reasonToState(reason);
401 transitionOrThrow(target);
402 final JinglePacket jinglePacket = new JinglePacket(JinglePacket.Action.SESSION_TERMINATE, id.sessionId);
403 jinglePacket.setReason(reason);
404 send(jinglePacket);
405 Log.d(Config.LOGTAG, jinglePacket.toString());
406 jingleConnectionManager.finishConnection(this);
407 }
408
409 private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) {
410 final RtpContentMap transportInfo;
411 try {
412 final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap;
413 transportInfo = rtpContentMap.transportInfo(contentName, candidate);
414 } catch (Exception e) {
415 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName);
416 return;
417 }
418 final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId);
419 Log.d(Config.LOGTAG, jinglePacket.toString());
420 send(jinglePacket);
421 }
422
423 private void send(final JinglePacket jinglePacket) {
424 jinglePacket.setTo(id.with);
425 //TODO track errors
426 xmppConnectionService.sendIqPacket(id.account, jinglePacket, null);
427 }
428
429 public RtpEndUserState getEndUserState() {
430 switch (this.state) {
431 case PROPOSED:
432 case SESSION_INITIALIZED:
433 if (isInitiator()) {
434 return RtpEndUserState.RINGING;
435 } else {
436 return RtpEndUserState.INCOMING_CALL;
437 }
438 case PROCEED:
439 if (isInitiator()) {
440 return RtpEndUserState.RINGING;
441 } else {
442 return RtpEndUserState.ACCEPTING_CALL;
443 }
444 case SESSION_INITIALIZED_PRE_APPROVED:
445 if (isInitiator()) {
446 return RtpEndUserState.RINGING;
447 } else {
448 return RtpEndUserState.CONNECTING;
449 }
450 case SESSION_ACCEPTED:
451 final PeerConnection.PeerConnectionState state = webRTCWrapper.getState();
452 if (state == PeerConnection.PeerConnectionState.CONNECTED) {
453 return RtpEndUserState.CONNECTED;
454 } else if (state == PeerConnection.PeerConnectionState.NEW || state == PeerConnection.PeerConnectionState.CONNECTING) {
455 return RtpEndUserState.CONNECTING;
456 } else if (state == PeerConnection.PeerConnectionState.CLOSED) {
457 return RtpEndUserState.ENDING_CALL;
458 } else if (state == PeerConnection.PeerConnectionState.FAILED) {
459 return RtpEndUserState.CONNECTIVITY_ERROR;
460 } else {
461 return RtpEndUserState.ENDING_CALL;
462 }
463 case REJECTED:
464 case TERMINATED_DECLINED_OR_BUSY:
465 if (isInitiator()) {
466 return RtpEndUserState.DECLINED_OR_BUSY;
467 } else {
468 return RtpEndUserState.ENDED;
469 }
470 case TERMINATED_SUCCESS:
471 case ACCEPTED:
472 case RETRACTED:
473 case TERMINATED_CANCEL_OR_TIMEOUT:
474 return RtpEndUserState.ENDED;
475 case TERMINATED_CONNECTIVITY_ERROR:
476 return RtpEndUserState.CONNECTIVITY_ERROR;
477 }
478 throw new IllegalStateException(String.format("%s has no equivalent EndUserState", this.state));
479 }
480
481
482 public void acceptCall() {
483 switch (this.state) {
484 case PROPOSED:
485 acceptCallFromProposed();
486 break;
487 case SESSION_INITIALIZED:
488 acceptCallFromSessionInitialized();
489 break;
490 default:
491 throw new IllegalStateException("Can not accept call from " + this.state);
492 }
493 }
494
495 public void rejectCall() {
496 switch (this.state) {
497 case PROPOSED:
498 rejectCallFromProposed();
499 break;
500 case SESSION_INITIALIZED:
501 rejectCallFromSessionInitiate();
502 break;
503 default:
504 throw new IllegalStateException("Can not reject call from " + this.state);
505 }
506 }
507
508 public void endCall() {
509 if (isInState(State.PROCEED)) {
510 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ending call while in state PROCEED just means ending the connection");
511 webRTCWrapper.close();
512 jingleConnectionManager.finishConnection(this);
513 transitionOrThrow(State.TERMINATED_SUCCESS); //arguably this wasn't success; but not a real failure either
514 return;
515 }
516 if (isInitiator() && isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED)) {
517 webRTCWrapper.close();
518 sendSessionTerminate(Reason.CANCEL);
519 return;
520 }
521 if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
522 webRTCWrapper.close();
523 sendSessionTerminate(Reason.SUCCESS);
524 return;
525 }
526 throw new IllegalStateException("called 'endCall' while in state " + this.state);
527 }
528
529 private void setupWebRTC(final List<PeerConnection.IceServer> iceServers) {
530 this.webRTCWrapper.setup(this.xmppConnectionService);
531 this.webRTCWrapper.initializePeerConnection(iceServers);
532 }
533
534 private void acceptCallFromProposed() {
535 transitionOrThrow(State.PROCEED);
536 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
537 this.sendJingleMessage("accept", id.account.getJid().asBareJid());
538 this.sendJingleMessage("proceed");
539 }
540
541 private void rejectCallFromProposed() {
542 transitionOrThrow(State.REJECTED);
543 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
544 this.sendJingleMessage("reject");
545 jingleConnectionManager.finishConnection(this);
546 }
547
548 private void rejectCallFromSessionInitiate() {
549 webRTCWrapper.close();
550 sendSessionTerminate(Reason.DECLINE);
551 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
552 }
553
554 private void sendJingleMessage(final String action) {
555 sendJingleMessage(action, id.with);
556 }
557
558 private void sendJingleMessage(final String action, final Jid to) {
559 final MessagePacket messagePacket = new MessagePacket();
560 messagePacket.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
561 messagePacket.setTo(to);
562 messagePacket.addChild(action, Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId);
563 Log.d(Config.LOGTAG, messagePacket.toString());
564 xmppConnectionService.sendMessagePacket(id.account, messagePacket);
565 }
566
567 private void acceptCallFromSessionInitialized() {
568 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
569 sendSessionAccept();
570 }
571
572 private synchronized boolean isInState(State... state) {
573 return Arrays.asList(state).contains(this.state);
574 }
575
576 private synchronized boolean transition(final State target) {
577 final Collection<State> validTransitions = VALID_TRANSITIONS.get(this.state);
578 if (validTransitions != null && validTransitions.contains(target)) {
579 this.state = target;
580 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target);
581 updateEndUserState();
582 return true;
583 } else {
584 return false;
585 }
586 }
587
588 public void transitionOrThrow(final State target) {
589 if (!transition(target)) {
590 throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target));
591 }
592 }
593
594 @Override
595 public void onIceCandidate(final IceCandidate iceCandidate) {
596 final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp);
597 Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString());
598 sendTransportInfo(iceCandidate.sdpMid, candidate);
599 }
600
601 @Override
602 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
603 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnectionState changed to " + newState);
604 updateEndUserState();
605 if (newState == PeerConnection.PeerConnectionState.FAILED) { //TODO guard this in isState(initiated,initiated_approved,accepted) otherwise it might fire too late
606 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
607 }
608 }
609
610 private void updateEndUserState() {
611 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, getEndUserState());
612 }
613
614 private void discoverIceServers(final OnIceServersDiscovered onIceServersDiscovered) {
615 if (id.account.getXmppConnection().getFeatures().extendedServiceDiscovery()) {
616 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
617 request.setTo(Jid.of(id.account.getJid().getDomain()));
618 request.addChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
619 xmppConnectionService.sendIqPacket(id.account, request, (account, response) -> {
620 ImmutableList.Builder<PeerConnection.IceServer> listBuilder = new ImmutableList.Builder<>();
621 if (response.getType() == IqPacket.TYPE.RESULT) {
622 final Element services = response.findChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
623 final List<Element> children = services == null ? Collections.emptyList() : services.getChildren();
624 for (final Element child : children) {
625 if ("service".equals(child.getName())) {
626 final String type = child.getAttribute("type");
627 final String host = child.getAttribute("host");
628 final String sport = child.getAttribute("port");
629 final Integer port = sport == null ? null : Ints.tryParse(sport);
630 final String transport = child.getAttribute("transport");
631 final String username = child.getAttribute("username");
632 final String password = child.getAttribute("password");
633 if (Strings.isNullOrEmpty(host) || port == null) {
634 continue;
635 }
636 if (port < 0 || port > 65535) {
637 continue;
638 }
639 if (Arrays.asList("stun", "turn").contains(type) || Arrays.asList("udp", "tcp").contains(transport)) {
640 //TODO wrap ipv6 addresses
641 PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer.builder(String.format("%s:%s:%s?transport=%s", type, host, port, transport));
642 if (username != null && password != null) {
643 iceServerBuilder.setUsername(username);
644 iceServerBuilder.setPassword(password);
645 } else if (Arrays.asList("turn", "turns").contains(type)) {
646 //The WebRTC spec requires throwing an InvalidAccessError when username (from libwebrtc source coder)
647 //https://chromium.googlesource.com/external/webrtc/+/master/pc/ice_server_parsing.cc
648 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": skipping " + type + "/" + transport + " without username and password");
649 continue;
650 }
651 final PeerConnection.IceServer iceServer = iceServerBuilder.createIceServer();
652 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": discovered ICE Server: " + iceServer);
653 listBuilder.add(iceServer);
654 }
655 }
656 }
657 }
658 List<PeerConnection.IceServer> iceServers = listBuilder.build();
659 if (iceServers.size() == 0) {
660 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no ICE server found " + response);
661 }
662 onIceServersDiscovered.onIceServersDiscovered(iceServers);
663 });
664 } else {
665 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": has no external service discovery");
666 onIceServersDiscovered.onIceServersDiscovered(Collections.emptyList());
667 }
668 }
669
670 private interface OnIceServersDiscovered {
671 void onIceServersDiscovered(List<PeerConnection.IceServer> iceServers);
672 }
673}