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