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.entities.Account;
20import eu.siacs.conversations.xml.Element;
21import eu.siacs.conversations.xml.Namespace;
22import eu.siacs.conversations.xmpp.OnIqPacketReceived;
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));
40 transitionBuilder.put(State.SESSION_INITIALIZED, ImmutableList.of(State.SESSION_ACCEPTED, State.TERMINATED_CANCEL_OR_TIMEOUT));
41 transitionBuilder.put(State.SESSION_INITIALIZED_PRE_APPROVED, ImmutableList.of(State.SESSION_ACCEPTED, State.TERMINATED_CANCEL_OR_TIMEOUT));
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.initiatorRtpContentMap : this.responderRtpContentMap;
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 Log.d(Config.LOGTAG, "received candidate: " + iceCandidate);
129 if (isInState(State.SESSION_ACCEPTED)) {
130 this.webRTCWrapper.addIceCandidate(iceCandidate);
131 } else {
132 this.pendingIceCandidates.push(iceCandidate);
133 }
134 }
135 }
136 } else {
137 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received transport info while in state=" + this.state);
138 }
139 }
140
141 private void receiveSessionInitiate(final JinglePacket jinglePacket) {
142 if (isInitiator()) {
143 Log.d(Config.LOGTAG, String.format("%s: received session-initiate even though we were initiating", id.account.getJid().asBareJid()));
144 //TODO respond with out-of-order
145 return;
146 }
147 final RtpContentMap contentMap;
148 try {
149 contentMap = RtpContentMap.of(jinglePacket);
150 contentMap.requireContentDescriptions();
151 } catch (IllegalArgumentException | IllegalStateException | NullPointerException e) {
152 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
153 return;
154 }
155 Log.d(Config.LOGTAG, "processing session-init with " + contentMap.contents.size() + " contents");
156 final State target;
157 if (this.state == State.PROCEED) {
158 target = State.SESSION_INITIALIZED_PRE_APPROVED;
159 } else {
160 target = State.SESSION_INITIALIZED;
161 }
162 if (transition(target)) {
163 this.initiatorRtpContentMap = contentMap;
164 if (target == State.SESSION_INITIALIZED_PRE_APPROVED) {
165 Log.d(Config.LOGTAG, "automatically accepting");
166 sendSessionAccept();
167 } else {
168 Log.d(Config.LOGTAG, "start ringing");
169 //TODO start ringing
170 }
171 } else {
172 Log.d(Config.LOGTAG, String.format("%s: received session-initiate while in state %s", id.account.getJid().asBareJid(), state));
173 }
174 }
175
176 private void receiveSessionAccept(final JinglePacket jinglePacket) {
177 if (!isInitiator()) {
178 Log.d(Config.LOGTAG, String.format("%s: received session-accept even though we were responding", id.account.getJid().asBareJid()));
179 //TODO respond with out-of-order
180 return;
181 }
182 final RtpContentMap contentMap;
183 try {
184 contentMap = RtpContentMap.of(jinglePacket);
185 contentMap.requireContentDescriptions();
186 } catch (IllegalArgumentException | IllegalStateException | NullPointerException e) {
187 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": improperly formatted contents", e);
188 return;
189 }
190 Log.d(Config.LOGTAG, "processing session-accept with " + contentMap.contents.size() + " contents");
191 if (transition(State.SESSION_ACCEPTED)) {
192 receiveSessionAccept(contentMap);
193 } else {
194 Log.d(Config.LOGTAG, String.format("%s: received session-accept while in state %s", id.account.getJid().asBareJid(), state));
195 //TODO out-of-order
196 }
197 }
198
199 private void receiveSessionAccept(final RtpContentMap contentMap) {
200 this.responderRtpContentMap = contentMap;
201 org.webrtc.SessionDescription answer = new org.webrtc.SessionDescription(
202 org.webrtc.SessionDescription.Type.ANSWER,
203 SessionDescription.of(contentMap).toString()
204 );
205 try {
206 this.webRTCWrapper.setRemoteDescription(answer).get();
207 } catch (Exception e) {
208 Log.d(Config.LOGTAG, "unable to receive session accept", e);
209 }
210 }
211
212 private void sendSessionAccept() {
213 final RtpContentMap rtpContentMap = this.initiatorRtpContentMap;
214 if (rtpContentMap == null) {
215 throw new IllegalStateException("initiator RTP Content Map has not been set");
216 }
217 discoverIceServers(iceServers -> {
218 setupWebRTC(iceServers);
219 final org.webrtc.SessionDescription offer = new org.webrtc.SessionDescription(
220 org.webrtc.SessionDescription.Type.OFFER,
221 SessionDescription.of(rtpContentMap).toString()
222 );
223 try {
224 this.webRTCWrapper.setRemoteDescription(offer).get();
225 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createAnswer().get();
226 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
227 final RtpContentMap respondingRtpContentMap = RtpContentMap.of(sessionDescription);
228 sendSessionAccept(respondingRtpContentMap);
229 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription);
230 } catch (Exception e) {
231 Log.d(Config.LOGTAG, "unable to send session accept", e);
232
233 }
234 });
235 }
236
237 private void sendSessionAccept(final RtpContentMap rtpContentMap) {
238 this.responderRtpContentMap = rtpContentMap;
239 this.transitionOrThrow(State.SESSION_ACCEPTED);
240 final JinglePacket sessionAccept = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_ACCEPT, id.sessionId);
241 Log.d(Config.LOGTAG, sessionAccept.toString());
242 send(sessionAccept);
243 }
244
245 void deliveryMessage(final Jid from, final Element message) {
246 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": delivered message to JingleRtpConnection " + message);
247 switch (message.getName()) {
248 case "propose":
249 receivePropose(from, message);
250 break;
251 case "proceed":
252 receiveProceed(from, message);
253 break;
254 case "retract":
255 receiveRetract(from, message);
256 break;
257 case "reject":
258 receiveReject(from, message);
259 break;
260 case "accept":
261 receiveAccept(from, message);
262 break;
263 default:
264 break;
265 }
266 }
267
268 private void receiveAccept(Jid from, Element message) {
269 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
270 if (originatedFromMyself) {
271 if (transition(State.ACCEPTED)) {
272 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
273 this.jingleConnectionManager.finishConnection(this);
274 } else {
275 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to transition to accept because already in state=" + this.state);
276 }
277 } else {
278 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": ignoring 'accept' from " + from);
279 }
280 }
281
282 private void receiveReject(Jid from, Element message) {
283 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
284 //reject from another one of my clients
285 if (originatedFromMyself) {
286 if (transition(State.REJECTED)) {
287 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
288 this.jingleConnectionManager.finishConnection(this);
289 } else {
290 Log.d(Config.LOGTAG, "not able to transition into REJECTED because already in " + this.state);
291 }
292 } else {
293 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring reject from " + from + " for session with " + id.with);
294 }
295 }
296
297 private void receivePropose(final Jid from, final Element propose) {
298 final boolean originatedFromMyself = from.asBareJid().equals(id.account.getJid().asBareJid());
299 //TODO we can use initiator logic here
300 if (originatedFromMyself) {
301 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": saw proposal from mysql. ignoring");
302 } else if (transition(State.PROPOSED)) {
303 startRinging();
304 } else {
305 Log.d(Config.LOGTAG, id.account.getJid() + ": ignoring session proposal because already in " + state);
306 }
307 }
308
309 private void startRinging() {
310 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received call from " + id.with + ". start ringing");
311 xmppConnectionService.getNotificationService().showIncomingCallNotification(id);
312 }
313
314 private void receiveProceed(final Jid from, final Element proceed) {
315 if (from.equals(id.with)) {
316 if (isInitiator()) {
317 if (transition(State.PROCEED)) {
318 this.sendSessionInitiate(State.SESSION_INITIALIZED_PRE_APPROVED);
319 } else {
320 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because already in %s", id.account.getJid().asBareJid(), this.state));
321 }
322 } else {
323 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed because we were not initializing", id.account.getJid().asBareJid()));
324 }
325 } else if (from.asBareJid().equals(id.account.getJid().asBareJid())) {
326 if (transition(State.ACCEPTED)) {
327 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": moved session with " + id.with + " into state accepted after received carbon copied procced");
328 this.xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
329 this.jingleConnectionManager.finishConnection(this);
330 }
331 } else {
332 //TODO a carbon copied proceed from another client of mine has the same logic as `accept`
333 Log.d(Config.LOGTAG, String.format("%s: ignoring proceed from %s. was expected from %s", id.account.getJid().asBareJid(), from, id.with));
334 }
335 }
336
337 private void receiveRetract(final Jid from, final Element retract) {
338 if (from.equals(id.with)) {
339 if (transition(State.RETRACTED)) {
340 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
341 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": session with " + id.with + " has been retracted");
342 //TODO create missed call notification/message
343 jingleConnectionManager.finishConnection(this);
344 } else {
345 Log.d(Config.LOGTAG, "ignoring retract because already in " + this.state);
346 }
347 } else {
348 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": received retract from " + from + ". expected retract from" + id.with + ". ignoring");
349 }
350 }
351
352 private void sendSessionInitiate(final State targetState) {
353 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": prepare session-initiate");
354 discoverIceServers(iceServers -> {
355 setupWebRTC(iceServers);
356 try {
357 org.webrtc.SessionDescription webRTCSessionDescription = this.webRTCWrapper.createOffer().get();
358 final SessionDescription sessionDescription = SessionDescription.parse(webRTCSessionDescription.description);
359 Log.d(Config.LOGTAG, "description: " + webRTCSessionDescription.description);
360 final RtpContentMap rtpContentMap = RtpContentMap.of(sessionDescription);
361 sendSessionInitiate(rtpContentMap, targetState);
362 this.webRTCWrapper.setLocalDescription(webRTCSessionDescription).get();
363 } catch (Exception e) {
364 Log.d(Config.LOGTAG, "unable to sendSessionInitiate", e);
365 }
366 });
367 }
368
369 private void sendSessionInitiate(RtpContentMap rtpContentMap, final State targetState) {
370 this.initiatorRtpContentMap = rtpContentMap;
371 this.transitionOrThrow(targetState);
372 final JinglePacket sessionInitiate = rtpContentMap.toJinglePacket(JinglePacket.Action.SESSION_INITIATE, id.sessionId);
373 Log.d(Config.LOGTAG, sessionInitiate.toString());
374 send(sessionInitiate);
375 }
376
377 private void sendSessionTerminate(final Reason reason) {
378 final State target = reasonToState(reason);
379 transitionOrThrow(target);
380 final JinglePacket jinglePacket = new JinglePacket(JinglePacket.Action.SESSION_TERMINATE, id.sessionId);
381 jinglePacket.setReason(reason);
382 send(jinglePacket);
383 Log.d(Config.LOGTAG, jinglePacket.toString());
384 jingleConnectionManager.finishConnection(this);
385 }
386
387 private void sendTransportInfo(final String contentName, IceUdpTransportInfo.Candidate candidate) {
388 final RtpContentMap transportInfo;
389 try {
390 final RtpContentMap rtpContentMap = isInitiator() ? this.initiatorRtpContentMap : this.responderRtpContentMap;
391 transportInfo = rtpContentMap.transportInfo(contentName, candidate);
392 } catch (Exception e) {
393 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": unable to prepare transport-info from candidate for content=" + contentName);
394 return;
395 }
396 final JinglePacket jinglePacket = transportInfo.toJinglePacket(JinglePacket.Action.TRANSPORT_INFO, id.sessionId);
397 Log.d(Config.LOGTAG, jinglePacket.toString());
398 send(jinglePacket);
399 }
400
401 private void send(final JinglePacket jinglePacket) {
402 jinglePacket.setTo(id.with);
403 //TODO track errors
404 xmppConnectionService.sendIqPacket(id.account, jinglePacket, null);
405 }
406
407 public RtpEndUserState getEndUserState() {
408 switch (this.state) {
409 case PROPOSED:
410 case SESSION_INITIALIZED:
411 if (isInitiator()) {
412 return RtpEndUserState.RINGING;
413 } else {
414 return RtpEndUserState.INCOMING_CALL;
415 }
416 case PROCEED:
417 if (isInitiator()) {
418 return RtpEndUserState.CONNECTING;
419 } else {
420 return RtpEndUserState.ACCEPTING_CALL;
421 }
422 case SESSION_INITIALIZED_PRE_APPROVED:
423 return RtpEndUserState.CONNECTING;
424 case SESSION_ACCEPTED:
425 final PeerConnection.PeerConnectionState state = webRTCWrapper.getState();
426 if (state == PeerConnection.PeerConnectionState.CONNECTED) {
427 return RtpEndUserState.CONNECTED;
428 } else if (state == PeerConnection.PeerConnectionState.NEW || state == PeerConnection.PeerConnectionState.CONNECTING) {
429 return RtpEndUserState.CONNECTING;
430 } else if (state == PeerConnection.PeerConnectionState.CLOSED) {
431 return RtpEndUserState.ENDING_CALL;
432 } else if (state == PeerConnection.PeerConnectionState.FAILED) {
433 return RtpEndUserState.CONNECTIVITY_ERROR;
434 } else {
435 return RtpEndUserState.ENDING_CALL;
436 }
437 case REJECTED:
438 case TERMINATED_DECLINED_OR_BUSY:
439 if (isInitiator()) {
440 return RtpEndUserState.DECLINED_OR_BUSY;
441 } else {
442 return RtpEndUserState.ENDED;
443 }
444 case TERMINATED_SUCCESS:
445 case ACCEPTED:
446 case RETRACTED:
447 case TERMINATED_CANCEL_OR_TIMEOUT:
448 return RtpEndUserState.ENDED;
449 case TERMINATED_CONNECTIVITY_ERROR:
450 return RtpEndUserState.CONNECTIVITY_ERROR;
451 }
452 throw new IllegalStateException(String.format("%s has no equivalent EndUserState", this.state));
453 }
454
455
456 public void acceptCall() {
457 switch (this.state) {
458 case PROPOSED:
459 acceptCallFromProposed();
460 break;
461 case SESSION_INITIALIZED:
462 acceptCallFromSessionInitialized();
463 break;
464 default:
465 throw new IllegalStateException("Can not accept call from " + this.state);
466 }
467 }
468
469 public void rejectCall() {
470 switch (this.state) {
471 case PROPOSED:
472 rejectCallFromProposed();
473 break;
474 default:
475 throw new IllegalStateException("Can not reject call from " + this.state);
476 }
477 }
478
479 public void endCall() {
480 if (isInitiator() && isInState(State.SESSION_INITIALIZED)) {
481 webRTCWrapper.close();
482 sendSessionTerminate(Reason.CANCEL);
483 } else if (isInState(State.SESSION_INITIALIZED, State.SESSION_INITIALIZED_PRE_APPROVED, State.SESSION_ACCEPTED)) {
484 webRTCWrapper.close();
485 sendSessionTerminate(Reason.SUCCESS);
486 } else {
487 throw new IllegalStateException("called 'endCall' while in state " + this.state);
488 }
489 }
490
491 private void setupWebRTC(final List<PeerConnection.IceServer> iceServers) {
492 this.webRTCWrapper.setup(this.xmppConnectionService);
493 this.webRTCWrapper.initializePeerConnection(iceServers);
494 }
495
496 private void acceptCallFromProposed() {
497 transitionOrThrow(State.PROCEED);
498 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
499 this.sendJingleMessage("accept", id.account.getJid().asBareJid());
500 this.sendJingleMessage("proceed");
501 }
502
503 private void rejectCallFromProposed() {
504 transitionOrThrow(State.REJECTED);
505 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
506 this.sendJingleMessage("reject");
507 jingleConnectionManager.finishConnection(this);
508 }
509
510 private void sendJingleMessage(final String action) {
511 sendJingleMessage(action, id.with);
512 }
513
514 private void sendJingleMessage(final String action, final Jid to) {
515 final MessagePacket messagePacket = new MessagePacket();
516 messagePacket.setType(MessagePacket.TYPE_CHAT); //we want to carbon copy those
517 messagePacket.setTo(to);
518 messagePacket.addChild(action, Namespace.JINGLE_MESSAGE).setAttribute("id", id.sessionId);
519 Log.d(Config.LOGTAG, messagePacket.toString());
520 xmppConnectionService.sendMessagePacket(id.account, messagePacket);
521 }
522
523 private void acceptCallFromSessionInitialized() {
524 xmppConnectionService.getNotificationService().cancelIncomingCallNotification();
525 throw new IllegalStateException("accepting from this state has not been implemented yet");
526 }
527
528 private synchronized boolean isInState(State... state) {
529 return Arrays.asList(state).contains(this.state);
530 }
531
532 private synchronized boolean transition(final State target) {
533 final Collection<State> validTransitions = VALID_TRANSITIONS.get(this.state);
534 if (validTransitions != null && validTransitions.contains(target)) {
535 this.state = target;
536 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": transitioned into " + target);
537 updateEndUserState();
538 return true;
539 } else {
540 return false;
541 }
542 }
543
544 public void transitionOrThrow(final State target) {
545 if (!transition(target)) {
546 throw new IllegalStateException(String.format("Unable to transition from %s to %s", this.state, target));
547 }
548 }
549
550 @Override
551 public void onIceCandidate(final IceCandidate iceCandidate) {
552 final IceUdpTransportInfo.Candidate candidate = IceUdpTransportInfo.Candidate.fromSdpAttribute(iceCandidate.sdp);
553 Log.d(Config.LOGTAG, "sending candidate: " + iceCandidate.toString());
554 sendTransportInfo(iceCandidate.sdpMid, candidate);
555 }
556
557 @Override
558 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
559 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": PeerConnectionState changed to " + newState);
560 updateEndUserState();
561 if (newState == PeerConnection.PeerConnectionState.FAILED) { //TODO guard this in isState(initiated,initated_approved,accepted) otherwise it might fire too late
562 sendSessionTerminate(Reason.CONNECTIVITY_ERROR);
563 }
564 }
565
566 private void updateEndUserState() {
567 xmppConnectionService.notifyJingleRtpConnectionUpdate(id.account, id.with, id.sessionId, getEndUserState());
568 }
569
570 private void discoverIceServers(final OnIceServersDiscovered onIceServersDiscovered) {
571 if (id.account.getXmppConnection().getFeatures().extendedServiceDiscovery()) {
572 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
573 request.setTo(Jid.of(id.account.getJid().getDomain()));
574 request.addChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
575 xmppConnectionService.sendIqPacket(id.account, request, (account, response) -> {
576 ImmutableList.Builder<PeerConnection.IceServer> listBuilder = new ImmutableList.Builder<>();
577 if (response.getType() == IqPacket.TYPE.RESULT) {
578 final Element services = response.findChild("services", Namespace.EXTERNAL_SERVICE_DISCOVERY);
579 final List<Element> children = services == null ? Collections.emptyList() : services.getChildren();
580 for (final Element child : children) {
581 if ("service".equals(child.getName())) {
582 final String type = child.getAttribute("type");
583 final String host = child.getAttribute("host");
584 final String port = child.getAttribute("port");
585 final String transport = child.getAttribute("transport");
586 final String username = child.getAttribute("username");
587 final String password = child.getAttribute("password");
588 if (Arrays.asList("stun", "type").contains(type) && host != null && port != null && "udp".equals(transport)) {
589 PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer.builder(String.format("%s:%s:%s", type, host, port));
590 if (username != null && password != null) {
591 iceServerBuilder.setUsername(username);
592 iceServerBuilder.setPassword(password);
593 }
594 final PeerConnection.IceServer iceServer = iceServerBuilder.createIceServer();
595 Log.d(Config.LOGTAG, id.account.getJid().asBareJid() + ": discovered ICE Server: " + iceServer);
596 listBuilder.add(iceServer);
597 }
598 }
599 }
600 }
601 List<PeerConnection.IceServer> iceServers = listBuilder.build();
602 if (iceServers.size() == 0) {
603 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": no ICE server found " + response);
604 }
605 onIceServersDiscovered.onIceServersDiscovered(iceServers);
606 });
607 } else {
608 Log.w(Config.LOGTAG, id.account.getJid().asBareJid() + ": has no external service discovery");
609 onIceServersDiscovered.onIceServersDiscovered(Collections.emptyList());
610 }
611 }
612
613 private interface OnIceServersDiscovered {
614 void onIceServersDiscovered(List<PeerConnection.IceServer> iceServers);
615 }
616}