1package eu.siacs.conversations.xmpp.jingle;
2
3import java.util.ArrayList;
4import java.util.HashMap;
5import java.util.Iterator;
6import java.util.List;
7import java.util.Map.Entry;
8
9import android.util.Log;
10
11import eu.siacs.conversations.entities.Account;
12import eu.siacs.conversations.entities.Conversation;
13import eu.siacs.conversations.entities.Message;
14import eu.siacs.conversations.services.XmppConnectionService;
15import eu.siacs.conversations.xml.Element;
16import eu.siacs.conversations.xmpp.OnIqPacketReceived;
17import eu.siacs.conversations.xmpp.jingle.stanzas.Content;
18import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
19import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
20import eu.siacs.conversations.xmpp.stanzas.IqPacket;
21
22public class JingleConnection {
23
24 private JingleConnectionManager mJingleConnectionManager;
25 private XmppConnectionService mXmppConnectionService;
26
27 public static final int STATUS_INITIATED = 0;
28 public static final int STATUS_ACCEPTED = 1;
29 public static final int STATUS_TERMINATED = 2;
30 public static final int STATUS_CANCELED = 3;
31 public static final int STATUS_FINISHED = 4;
32 public static final int STATUS_TRANSMITTING = 5;
33 public static final int STATUS_FAILED = 99;
34
35 private int status = -1;
36 private Message message;
37 private String sessionId;
38 private Account account;
39 private String initiator;
40 private String responder;
41 private List<JingleCandidate> candidates = new ArrayList<JingleCandidate>();
42 private HashMap<String, SocksConnection> connections = new HashMap<String, SocksConnection>();
43
44 private String transportId;
45 private Element fileOffer;
46 private JingleFile file = null;
47
48 private boolean receivedCandidate = false;
49 private boolean sentCandidate = false;
50
51 private JingleTransport transport = null;
52
53 private OnIqPacketReceived responseListener = new OnIqPacketReceived() {
54
55 @Override
56 public void onIqPacketReceived(Account account, IqPacket packet) {
57 if (packet.getType() == IqPacket.TYPE_ERROR) {
58 mXmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
59 status = STATUS_FAILED;
60 }
61 }
62 };
63
64 final OnFileTransmitted onFileTransmitted = new OnFileTransmitted() {
65
66 @Override
67 public void onFileTransmitted(JingleFile file) {
68 if (responder.equals(account.getFullJid())) {
69 sendSuccess();
70 mXmppConnectionService.markMessage(message, Message.STATUS_RECIEVED);
71 }
72 Log.d("xmppService","sucessfully transmitted file. sha1:"+file.getSha1Sum());
73 }
74 };
75
76 private OnProxyActivated onProxyActivated = new OnProxyActivated() {
77
78 @Override
79 public void success() {
80 if (initiator.equals(account.getFullJid())) {
81 Log.d("xmppService","we were initiating. sending file");
82 transport.send(file,onFileTransmitted);
83 } else {
84 transport.receive(file,onFileTransmitted);
85 Log.d("xmppService","we were responding. receiving file");
86 }
87 }
88
89 @Override
90 public void failed() {
91 Log.d("xmppService","proxy activation failed");
92 }
93 };
94
95 public JingleConnection(JingleConnectionManager mJingleConnectionManager) {
96 this.mJingleConnectionManager = mJingleConnectionManager;
97 this.mXmppConnectionService = mJingleConnectionManager.getXmppConnectionService();
98 }
99
100 public String getSessionId() {
101 return this.sessionId;
102 }
103
104 public String getAccountJid() {
105 return this.account.getFullJid();
106 }
107
108 public String getCounterPart() {
109 return this.message.getCounterpart();
110 }
111
112 public void deliverPacket(JinglePacket packet) {
113
114 if (packet.isAction("session-terminate")) {
115 Reason reason = packet.getReason();
116 if (reason!=null) {
117 if (reason.hasChild("cancel")) {
118 this.cancel();
119 } else if (reason.hasChild("success")) {
120 this.finish();
121 }
122 } else {
123 Log.d("xmppService","remote terminated for no reason");
124 this.cancel();
125 }
126 } else if (packet.isAction("session-accept")) {
127 accept(packet);
128 } else if (packet.isAction("transport-info")) {
129 transportInfo(packet);
130 } else {
131 Log.d("xmppService","packet arrived in connection. action was "+packet.getAction());
132 }
133 }
134
135 public void init(Message message) {
136 this.message = message;
137 this.account = message.getConversation().getAccount();
138 this.initiator = this.account.getFullJid();
139 this.responder = this.message.getCounterpart();
140 this.sessionId = this.mJingleConnectionManager.nextRandomId();
141 if (this.candidates.size() > 0) {
142 this.sendInitRequest();
143 } else {
144 this.mJingleConnectionManager.getPrimaryCandidate(account, new OnPrimaryCandidateFound() {
145
146 @Override
147 public void onPrimaryCandidateFound(boolean success, final JingleCandidate candidate) {
148 if (success) {
149 final SocksConnection socksConnection = new SocksConnection(JingleConnection.this, candidate);
150 connections.put(candidate.getCid(), socksConnection);
151 socksConnection.connect(new OnSocksConnection() {
152
153 @Override
154 public void failed() {
155 Log.d("xmppService","connection to our own primary candidete failed");
156 sendInitRequest();
157 }
158
159 @Override
160 public void established() {
161 Log.d("xmppService","succesfully connected to our own primary candidate");
162 mergeCandidate(candidate);
163 sendInitRequest();
164 }
165 });
166 mergeCandidate(candidate);
167 } else {
168 Log.d("xmppService","no primary candidate of our own was found");
169 sendInitRequest();
170 }
171 }
172 });
173 }
174
175 }
176
177 public void init(Account account, JinglePacket packet) {
178 this.status = STATUS_INITIATED;
179 Conversation conversation = this.mXmppConnectionService.findOrCreateConversation(account, packet.getFrom().split("/")[0], false);
180 this.message = new Message(conversation, "receiving image file", Message.ENCRYPTION_NONE);
181 this.message.setType(Message.TYPE_IMAGE);
182 this.message.setStatus(Message.STATUS_RECIEVING);
183 String[] fromParts = packet.getFrom().split("/");
184 this.message.setPresence(fromParts[1]);
185 this.account = account;
186 this.initiator = packet.getFrom();
187 this.responder = this.account.getFullJid();
188 this.sessionId = packet.getSessionId();
189 Content content = packet.getJingleContent();
190 this.transportId = content.getTransportId();
191 this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
192 this.fileOffer = packet.getJingleContent().getFileOffer();
193 if (fileOffer!=null) {
194 this.file = this.mXmppConnectionService.getFileBackend().getJingleFile(message);
195 Element fileSize = fileOffer.findChild("size");
196 Element fileName = fileOffer.findChild("name");
197 this.file.setExpectedSize(Long.parseLong(fileSize.getContent()));
198 conversation.getMessages().add(message);
199 this.mXmppConnectionService.databaseBackend.createMessage(message);
200 if (this.mXmppConnectionService.convChangedListener!=null) {
201 this.mXmppConnectionService.convChangedListener.onConversationListChanged();
202 }
203 if (this.file.getExpectedSize()<=this.mJingleConnectionManager.getAutoAcceptFileSize()) {
204 Log.d("xmppService","auto accepting file from "+packet.getFrom());
205 this.sendAccept();
206 } else {
207 Log.d("xmppService","not auto accepting new file offer with size: "+this.file.getExpectedSize()+" allowed size:"+this.mJingleConnectionManager.getAutoAcceptFileSize());
208 }
209 } else {
210 Log.d("xmppService","no file offer was attached. aborting");
211 }
212 }
213
214 private void sendInitRequest() {
215 JinglePacket packet = this.bootstrapPacket("session-initiate");
216 Content content = new Content();
217 if (message.getType() == Message.TYPE_IMAGE) {
218 content.setAttribute("creator", "initiator");
219 content.setAttribute("name", "a-file-offer");
220 content.setTransportId(this.transportId);
221 this.file = this.mXmppConnectionService.getFileBackend().getJingleFile(message);
222 content.setFileOffer(this.file);
223 this.transportId = this.mJingleConnectionManager.nextRandomId();
224 content.socks5transport().setChildren(getCandidatesAsElements());
225 packet.setContent(content);
226 this.sendJinglePacket(packet);
227 this.status = STATUS_INITIATED;
228 }
229 }
230
231 private List<Element> getCandidatesAsElements() {
232 List<Element> elements = new ArrayList<Element>();
233 for(JingleCandidate c : this.candidates) {
234 elements.add(c.toElement());
235 }
236 return elements;
237 }
238
239 private void sendAccept() {
240 status = STATUS_ACCEPTED;
241 connectNextCandidate();
242 this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() {
243
244 @Override
245 public void onPrimaryCandidateFound(boolean success,final JingleCandidate candidate) {
246 final JinglePacket packet = bootstrapPacket("session-accept");
247 final Content content = new Content();
248 content.setFileOffer(fileOffer);
249 content.setTransportId(transportId);
250 if ((success)&&(!equalCandidateExists(candidate))) {
251 final SocksConnection socksConnection = new SocksConnection(JingleConnection.this, candidate);
252 connections.put(candidate.getCid(), socksConnection);
253 socksConnection.connect(new OnSocksConnection() {
254
255 @Override
256 public void failed() {
257 Log.d("xmppService","connection to our own primary candidate failed");
258 content.socks5transport().setChildren(getCandidatesAsElements());
259 packet.setContent(content);
260 sendJinglePacket(packet);
261 }
262
263 @Override
264 public void established() {
265 Log.d("xmppService","connected to primary candidate");
266 mergeCandidate(candidate);
267 content.socks5transport().setChildren(getCandidatesAsElements());
268 packet.setContent(content);
269 sendJinglePacket(packet);
270 }
271 });
272 } else {
273 Log.d("xmppService","did not find a primary candidate for ourself");
274 content.socks5transport().setChildren(getCandidatesAsElements());
275 packet.setContent(content);
276 sendJinglePacket(packet);
277 }
278 }
279 });
280
281 }
282
283 private JinglePacket bootstrapPacket(String action) {
284 JinglePacket packet = new JinglePacket();
285 packet.setAction(action);
286 packet.setFrom(account.getFullJid());
287 packet.setTo(this.message.getCounterpart());
288 packet.setSessionId(this.sessionId);
289 packet.setInitiator(this.initiator);
290 return packet;
291 }
292
293 private void sendJinglePacket(JinglePacket packet) {
294 //Log.d("xmppService",packet.toString());
295 account.getXmppConnection().sendIqPacket(packet,responseListener);
296 }
297
298 private void accept(JinglePacket packet) {
299 Content content = packet.getJingleContent();
300 mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
301 this.status = STATUS_ACCEPTED;
302 this.connectNextCandidate();
303 IqPacket response = packet.generateRespone(IqPacket.TYPE_RESULT);
304 account.getXmppConnection().sendIqPacket(response, null);
305 }
306
307 private void transportInfo(JinglePacket packet) {
308 Content content = packet.getJingleContent();
309 if (content.hasSocks5Transport()) {
310 if (content.socks5transport().hasChild("activated")) {
311 onProxyActivated.success();
312 } else if (content.socks5transport().hasChild("activated")) {
313 onProxyActivated.failed();
314 } else if (content.socks5transport().hasChild("candidate-error")) {
315 Log.d("xmppService","received candidate error");
316 this.receivedCandidate = true;
317 if (status == STATUS_ACCEPTED) {
318 this.connect();
319 }
320 } else if (content.socks5transport().hasChild("candidate-used")){
321 String cid = content.socks5transport().findChild("candidate-used").getAttribute("cid");
322 if (cid!=null) {
323 Log.d("xmppService","candidate used by counterpart:"+cid);
324 JingleCandidate candidate = getCandidate(cid);
325 candidate.flagAsUsedByCounterpart();
326 this.receivedCandidate = true;
327 if ((status == STATUS_ACCEPTED)&&(this.sentCandidate)) {
328 this.connect();
329 } else {
330 Log.d("xmppService","ignoring because file is already in transmission or we havent sent our candidate yet");
331 }
332 } else {
333 Log.d("xmppService","couldn't read used candidate");
334 }
335 } else {
336 Log.d("xmppService","empty transport");
337 }
338 }
339
340 IqPacket response = packet.generateRespone(IqPacket.TYPE_RESULT);
341 account.getXmppConnection().sendIqPacket(response, null);
342 }
343
344 private void connect() {
345 final SocksConnection connection = chooseConnection();
346 this.transport = connection;
347 if (connection==null) {
348 Log.d("xmppService","could not find suitable candidate");
349 this.disconnect();
350 this.status = STATUS_FAILED;
351 this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND_FAILED);
352 } else {
353 this.status = STATUS_TRANSMITTING;
354 if (connection.isProxy()) {
355 if (connection.getCandidate().isOurs()) {
356 Log.d("xmppService","candidate "+connection.getCandidate().getCid()+" was our proxy and needs activation");
357 IqPacket activation = new IqPacket(IqPacket.TYPE_SET);
358 activation.setTo(connection.getCandidate().getJid());
359 activation.query("http://jabber.org/protocol/bytestreams").setAttribute("sid", this.getSessionId());
360 activation.query().addChild("activate").setContent(this.getCounterPart());
361 this.account.getXmppConnection().sendIqPacket(activation, new OnIqPacketReceived() {
362
363 @Override
364 public void onIqPacketReceived(Account account, IqPacket packet) {
365 if (packet.getType()==IqPacket.TYPE_ERROR) {
366 onProxyActivated.failed();
367 } else {
368 onProxyActivated.success();
369 sendProxyActivated(connection.getCandidate().getCid());
370 }
371 }
372 });
373 }
374 } else {
375 if (initiator.equals(account.getFullJid())) {
376 Log.d("xmppService","we were initiating. sending file");
377 connection.send(file,onFileTransmitted);
378 } else {
379 Log.d("xmppService","we were responding. receiving file");
380 connection.receive(file,onFileTransmitted);
381 }
382 }
383 }
384 }
385
386 private SocksConnection chooseConnection() {
387 SocksConnection connection = null;
388 Iterator<Entry<String, SocksConnection>> it = this.connections.entrySet().iterator();
389 while (it.hasNext()) {
390 Entry<String, SocksConnection> pairs = it.next();
391 SocksConnection currentConnection = pairs.getValue();
392 //Log.d("xmppService","comparing candidate: "+currentConnection.getCandidate().toString());
393 if (currentConnection.isEstablished()&&(currentConnection.getCandidate().isUsedByCounterpart()||(!currentConnection.getCandidate().isOurs()))) {
394 //Log.d("xmppService","is usable");
395 if (connection==null) {
396 connection = currentConnection;
397 } else {
398 if (connection.getCandidate().getPriority()<currentConnection.getCandidate().getPriority()) {
399 connection = currentConnection;
400 } else if (connection.getCandidate().getPriority()==currentConnection.getCandidate().getPriority()) {
401 //Log.d("xmppService","found two candidates with same priority");
402 if (initiator.equals(account.getFullJid())) {
403 if (currentConnection.getCandidate().isOurs()) {
404 connection = currentConnection;
405 }
406 } else {
407 if (!currentConnection.getCandidate().isOurs()) {
408 connection = currentConnection;
409 }
410 }
411 }
412 }
413 }
414 it.remove();
415 }
416 return connection;
417 }
418
419 private void sendSuccess() {
420 JinglePacket packet = bootstrapPacket("session-terminate");
421 Reason reason = new Reason();
422 reason.addChild("success");
423 packet.setReason(reason);
424 this.sendJinglePacket(packet);
425 this.disconnect();
426 this.status = STATUS_FINISHED;
427 this.mXmppConnectionService.markMessage(this.message, Message.STATUS_RECIEVED);
428 }
429
430 private void finish() {
431 this.status = STATUS_FINISHED;
432 this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND);
433 this.disconnect();
434 }
435
436 public void cancel() {
437 this.disconnect();
438 this.status = STATUS_CANCELED;
439 this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND_REJECTED);
440 }
441
442 private void connectNextCandidate() {
443 for(JingleCandidate candidate : this.candidates) {
444 if ((!connections.containsKey(candidate.getCid())&&(!candidate.isOurs()))) {
445 this.connectWithCandidate(candidate);
446 return;
447 }
448 }
449 this.sendCandidateError();
450 }
451
452 private void connectWithCandidate(final JingleCandidate candidate) {
453 final SocksConnection socksConnection = new SocksConnection(this,candidate);
454 connections.put(candidate.getCid(), socksConnection);
455 socksConnection.connect(new OnSocksConnection() {
456
457 @Override
458 public void failed() {
459 Log.d("xmppService", "connection failed with "+candidate.getHost()+":"+candidate.getPort());
460 connectNextCandidate();
461 }
462
463 @Override
464 public void established() {
465 Log.d("xmppService", "established connection with "+candidate.getHost()+":"+candidate.getPort());
466 sendCandidateUsed(candidate.getCid());
467 }
468 });
469 }
470
471 private void disconnect() {
472 Iterator<Entry<String, SocksConnection>> it = this.connections.entrySet().iterator();
473 while (it.hasNext()) {
474 Entry<String, SocksConnection> pairs = it.next();
475 pairs.getValue().disconnect();
476 it.remove();
477 }
478 }
479
480 private void sendProxyActivated(String cid) {
481 JinglePacket packet = bootstrapPacket("transport-info");
482 Content content = new Content();
483 //TODO: put these into actual variables
484 content.setAttribute("creator", "initiator");
485 content.setAttribute("name", "a-file-offer");
486 content.setTransportId(this.transportId);
487 content.socks5transport().addChild("activated").setAttribute("cid", cid);
488 packet.setContent(content);
489 this.sendJinglePacket(packet);
490 }
491
492 private void sendCandidateUsed(final String cid) {
493 JinglePacket packet = bootstrapPacket("transport-info");
494 Content content = new Content();
495 //TODO: put these into actual variables
496 content.setAttribute("creator", "initiator");
497 content.setAttribute("name", "a-file-offer");
498 content.setTransportId(this.transportId);
499 content.setUsedCandidate(cid);
500 packet.setContent(content);
501 this.sendJinglePacket(packet);
502 this.sentCandidate = true;
503 if ((receivedCandidate)&&(status == STATUS_ACCEPTED)) {
504 connect();
505 }
506 }
507
508 private void sendCandidateError() {
509 JinglePacket packet = bootstrapPacket("transport-info");
510 Content content = new Content();
511 //TODO: put these into actual variables
512 content.setAttribute("creator", "initiator");
513 content.setAttribute("name", "a-file-offer");
514 content.setTransportId(this.transportId);
515 content.setCandidateError();
516 packet.setContent(content);
517 this.sendJinglePacket(packet);
518 this.sentCandidate = true;
519 if ((receivedCandidate)&&(status == STATUS_ACCEPTED)) {
520 connect();
521 }
522 }
523
524 public String getInitiator() {
525 return this.initiator;
526 }
527
528 public String getResponder() {
529 return this.responder;
530 }
531
532 public int getStatus() {
533 return this.status;
534 }
535
536 private boolean equalCandidateExists(JingleCandidate candidate) {
537 for(JingleCandidate c : this.candidates) {
538 if (c.equalValues(candidate)) {
539 return true;
540 }
541 }
542 return false;
543 }
544
545 private void mergeCandidate(JingleCandidate candidate) {
546 for(JingleCandidate c : this.candidates) {
547 if (c.equals(candidate)) {
548 return;
549 }
550 }
551 this.candidates.add(candidate);
552 }
553
554 private void mergeCandidates(List<JingleCandidate> candidates) {
555 for(JingleCandidate c : candidates) {
556 mergeCandidate(c);
557 }
558 }
559
560 private JingleCandidate getCandidate(String cid) {
561 for(JingleCandidate c : this.candidates) {
562 if (c.getCid().equals(cid)) {
563 return c;
564 }
565 }
566 return null;
567 }
568
569 interface OnProxyActivated {
570 public void success();
571 public void failed();
572 }
573}