1package eu.siacs.conversations.xmpp.jingle;
2
3import android.util.Log;
4import android.util.Pair;
5
6import java.io.FileNotFoundException;
7import java.io.InputStream;
8import java.io.OutputStream;
9import java.util.ArrayList;
10import java.util.Iterator;
11import java.util.List;
12import java.util.Locale;
13import java.util.Map.Entry;
14import java.util.concurrent.ConcurrentHashMap;
15
16import eu.siacs.conversations.Config;
17import eu.siacs.conversations.crypto.axolotl.AxolotlService;
18import eu.siacs.conversations.crypto.axolotl.OnMessageCreatedCallback;
19import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
20import eu.siacs.conversations.entities.Account;
21import eu.siacs.conversations.entities.Conversation;
22import eu.siacs.conversations.entities.DownloadableFile;
23import eu.siacs.conversations.entities.Message;
24import eu.siacs.conversations.entities.Presence;
25import eu.siacs.conversations.entities.ServiceDiscoveryResult;
26import eu.siacs.conversations.entities.Transferable;
27import eu.siacs.conversations.entities.TransferablePlaceholder;
28import eu.siacs.conversations.parser.IqParser;
29import eu.siacs.conversations.persistance.FileBackend;
30import eu.siacs.conversations.services.AbstractConnectionManager;
31import eu.siacs.conversations.services.XmppConnectionService;
32import eu.siacs.conversations.xml.Element;
33import eu.siacs.conversations.xmpp.OnIqPacketReceived;
34import eu.siacs.conversations.xmpp.jid.Jid;
35import eu.siacs.conversations.xmpp.jingle.stanzas.Content;
36import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
37import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
38import eu.siacs.conversations.xmpp.stanzas.IqPacket;
39
40public class JingleConnection implements Transferable {
41
42 private JingleConnectionManager mJingleConnectionManager;
43 private XmppConnectionService mXmppConnectionService;
44
45 protected static final int JINGLE_STATUS_INITIATED = 0;
46 protected static final int JINGLE_STATUS_ACCEPTED = 1;
47 protected static final int JINGLE_STATUS_FINISHED = 4;
48 protected static final int JINGLE_STATUS_TRANSMITTING = 5;
49 protected static final int JINGLE_STATUS_FAILED = 99;
50
51 private Content.Version ftVersion = Content.Version.FT_3;
52
53 private int ibbBlockSize = 8192;
54
55 private int mJingleStatus = -1;
56 private int mStatus = Transferable.STATUS_UNKNOWN;
57 private Message message;
58 private String sessionId;
59 private Account account;
60 private Jid initiator;
61 private Jid responder;
62 private List<JingleCandidate> candidates = new ArrayList<>();
63 private ConcurrentHashMap<String, JingleSocks5Transport> connections = new ConcurrentHashMap<>();
64
65 private String transportId;
66 private Element fileOffer;
67 private DownloadableFile file = null;
68
69 private String contentName;
70 private String contentCreator;
71
72 private int mProgress = 0;
73
74 private boolean receivedCandidate = false;
75 private boolean sentCandidate = false;
76
77 private boolean acceptedAutomatically = false;
78
79 private XmppAxolotlMessage mXmppAxolotlMessage;
80
81 private JingleTransport transport = null;
82
83 private OutputStream mFileOutputStream;
84 private InputStream mFileInputStream;
85
86 private OnIqPacketReceived responseListener = new OnIqPacketReceived() {
87
88 @Override
89 public void onIqPacketReceived(Account account, IqPacket packet) {
90 if (packet.getType() != IqPacket.TYPE.RESULT) {
91 fail(IqParser.extractErrorMessage(packet));
92 }
93 }
94 };
95
96 final OnFileTransmissionStatusChanged onFileTransmissionSatusChanged = new OnFileTransmissionStatusChanged() {
97
98 @Override
99 public void onFileTransmitted(DownloadableFile file) {
100 if (responder.equals(account.getJid())) {
101 sendSuccess();
102 mXmppConnectionService.getFileBackend().updateFileParams(message);
103 mXmppConnectionService.databaseBackend.createMessage(message);
104 mXmppConnectionService.markMessage(message,Message.STATUS_RECEIVED);
105 if (acceptedAutomatically) {
106 message.markUnread();
107 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
108 account.getPgpDecryptionService().decrypt(message, true);
109 } else {
110 JingleConnection.this.mXmppConnectionService.getNotificationService().push(message);
111 }
112 }
113 } else {
114 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
115 account.getPgpDecryptionService().decrypt(message, false);
116 }
117 if (message.getEncryption() == Message.ENCRYPTION_PGP || message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
118 file.delete();
119 }
120 }
121 Log.d(Config.LOGTAG,"successfully transmitted file:" + file.getAbsolutePath()+" ("+file.getSha1Sum()+")");
122 if (message.getEncryption() != Message.ENCRYPTION_PGP) {
123 mXmppConnectionService.getFileBackend().updateMediaScanner(file);
124 }
125 }
126
127 @Override
128 public void onFileTransferAborted() {
129 JingleConnection.this.sendCancel();
130 JingleConnection.this.fail();
131 }
132 };
133
134 public InputStream getFileInputStream() {
135 return this.mFileInputStream;
136 }
137
138 public OutputStream getFileOutputStream() {
139 return this.mFileOutputStream;
140 }
141
142 private OnProxyActivated onProxyActivated = new OnProxyActivated() {
143
144 @Override
145 public void success() {
146 if (initiator.equals(account.getJid())) {
147 Log.d(Config.LOGTAG, "we were initiating. sending file");
148 transport.send(file, onFileTransmissionSatusChanged);
149 } else {
150 transport.receive(file, onFileTransmissionSatusChanged);
151 Log.d(Config.LOGTAG, "we were responding. receiving file");
152 }
153 }
154
155 @Override
156 public void failed() {
157 Log.d(Config.LOGTAG, "proxy activation failed");
158 }
159 };
160
161 public JingleConnection(JingleConnectionManager mJingleConnectionManager) {
162 this.mJingleConnectionManager = mJingleConnectionManager;
163 this.mXmppConnectionService = mJingleConnectionManager
164 .getXmppConnectionService();
165 }
166
167 public String getSessionId() {
168 return this.sessionId;
169 }
170
171 public Account getAccount() {
172 return this.account;
173 }
174
175 public Jid getCounterPart() {
176 return this.message.getCounterpart();
177 }
178
179 public void deliverPacket(JinglePacket packet) {
180 boolean returnResult = true;
181 if (packet.isAction("session-terminate")) {
182 Reason reason = packet.getReason();
183 if (reason != null) {
184 if (reason.hasChild("cancel")) {
185 this.fail();
186 } else if (reason.hasChild("success")) {
187 this.receiveSuccess();
188 } else {
189 this.fail();
190 }
191 } else {
192 this.fail();
193 }
194 } else if (packet.isAction("session-accept")) {
195 returnResult = receiveAccept(packet);
196 } else if (packet.isAction("transport-info")) {
197 returnResult = receiveTransportInfo(packet);
198 } else if (packet.isAction("transport-replace")) {
199 if (packet.getJingleContent().hasIbbTransport()) {
200 returnResult = this.receiveFallbackToIbb(packet);
201 } else {
202 returnResult = false;
203 Log.d(Config.LOGTAG, "trying to fallback to something unknown"
204 + packet.toString());
205 }
206 } else if (packet.isAction("transport-accept")) {
207 returnResult = this.receiveTransportAccept(packet);
208 } else {
209 Log.d(Config.LOGTAG, "packet arrived in connection. action was "
210 + packet.getAction());
211 returnResult = false;
212 }
213 IqPacket response;
214 if (returnResult) {
215 response = packet.generateResponse(IqPacket.TYPE.RESULT);
216
217 } else {
218 response = packet.generateResponse(IqPacket.TYPE.ERROR);
219 }
220 mXmppConnectionService.sendIqPacket(account,response,null);
221 }
222
223 public void init(final Message message) {
224 if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
225 Conversation conversation = message.getConversation();
226 conversation.getAccount().getAxolotlService().prepareKeyTransportMessage(conversation, new OnMessageCreatedCallback() {
227 @Override
228 public void run(XmppAxolotlMessage xmppAxolotlMessage) {
229 if (xmppAxolotlMessage != null) {
230 init(message, xmppAxolotlMessage);
231 } else {
232 fail();
233 }
234 }
235 });
236 } else {
237 init(message, null);
238 }
239 }
240
241 private void init(Message message, XmppAxolotlMessage xmppAxolotlMessage) {
242 this.mXmppAxolotlMessage = xmppAxolotlMessage;
243 this.contentCreator = "initiator";
244 this.contentName = this.mJingleConnectionManager.nextRandomId();
245 this.message = message;
246 this.account = message.getConversation().getAccount();
247 upgradeNamespace();
248 this.message.setTransferable(this);
249 this.mStatus = Transferable.STATUS_UPLOADING;
250 this.initiator = this.account.getJid();
251 this.responder = this.message.getCounterpart();
252 this.sessionId = this.mJingleConnectionManager.nextRandomId();
253 this.transportId = this.mJingleConnectionManager.nextRandomId();
254 if (this.candidates.size() > 0) {
255 this.sendInitRequest();
256 } else {
257 this.mJingleConnectionManager.getPrimaryCandidate(account,
258 new OnPrimaryCandidateFound() {
259
260 @Override
261 public void onPrimaryCandidateFound(boolean success,
262 final JingleCandidate candidate) {
263 if (success) {
264 final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
265 JingleConnection.this, candidate);
266 connections.put(candidate.getCid(),
267 socksConnection);
268 socksConnection
269 .connect(new OnTransportConnected() {
270
271 @Override
272 public void failed() {
273 Log.d(Config.LOGTAG,
274 "connection to our own primary candidete failed");
275 sendInitRequest();
276 }
277
278 @Override
279 public void established() {
280 Log.d(Config.LOGTAG,
281 "successfully connected to our own primary candidate");
282 mergeCandidate(candidate);
283 sendInitRequest();
284 }
285 });
286 mergeCandidate(candidate);
287 } else {
288 Log.d(Config.LOGTAG, "no primary candidate of our own was found");
289 sendInitRequest();
290 }
291 }
292 });
293 }
294
295 }
296
297 private void upgradeNamespace() {
298 Jid jid = this.message.getCounterpart();
299 String resource = jid != null ?jid.getResourcepart() : null;
300 if (resource != null) {
301 Presence presence = this.account.getRoster().getContact(jid).getPresences().getPresences().get(resource);
302 ServiceDiscoveryResult result = presence != null ? presence.getServiceDiscoveryResult() : null;
303 if (result != null) {
304 List<String> features = result.getFeatures();
305 if (features.contains(Content.Version.FT_4.getNamespace())) {
306 this.ftVersion = Content.Version.FT_4;
307 }
308 }
309 }
310 }
311
312 public void init(Account account, JinglePacket packet) {
313 this.mJingleStatus = JINGLE_STATUS_INITIATED;
314 Conversation conversation = this.mXmppConnectionService
315 .findOrCreateConversation(account,
316 packet.getFrom().toBareJid(), false);
317 this.message = new Message(conversation, "", Message.ENCRYPTION_NONE);
318 this.message.setStatus(Message.STATUS_RECEIVED);
319 this.mStatus = Transferable.STATUS_OFFER;
320 this.message.setTransferable(this);
321 final Jid from = packet.getFrom();
322 this.message.setCounterpart(from);
323 this.account = account;
324 this.initiator = packet.getFrom();
325 this.responder = this.account.getJid();
326 this.sessionId = packet.getSessionId();
327 Content content = packet.getJingleContent();
328 this.contentCreator = content.getAttribute("creator");
329 this.contentName = content.getAttribute("name");
330 this.transportId = content.getTransportId();
331 this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
332 this.ftVersion = content.getVersion();
333 if (ftVersion == null) {
334 this.sendCancel();
335 this.fail();
336 return;
337 }
338 this.fileOffer = content.getFileOffer(this.ftVersion);
339
340 mXmppConnectionService.sendIqPacket(account,packet.generateResponse(IqPacket.TYPE.RESULT),null);
341
342 if (fileOffer != null) {
343 Element encrypted = fileOffer.findChild("encrypted", AxolotlService.PEP_PREFIX);
344 if (encrypted != null) {
345 this.mXmppAxolotlMessage = XmppAxolotlMessage.fromElement(encrypted, packet.getFrom().toBareJid());
346 }
347 Element fileSize = fileOffer.findChild("size");
348 Element fileNameElement = fileOffer.findChild("name");
349 if (fileNameElement != null) {
350 String[] filename = fileNameElement.getContent()
351 .toLowerCase(Locale.US).toLowerCase().split("\\.");
352 String extension = filename[filename.length - 1];
353 if (VALID_IMAGE_EXTENSIONS.contains(extension)) {
354 message.setType(Message.TYPE_IMAGE);
355 message.setRelativeFilePath(message.getUuid()+"."+extension);
356 } else if (VALID_CRYPTO_EXTENSIONS.contains(
357 filename[filename.length - 1])) {
358 if (filename.length == 3) {
359 extension = filename[filename.length - 2];
360 if (VALID_IMAGE_EXTENSIONS.contains(extension)) {
361 message.setType(Message.TYPE_IMAGE);
362 message.setRelativeFilePath(message.getUuid()+"."+extension);
363 } else {
364 message.setType(Message.TYPE_FILE);
365 }
366 if (filename[filename.length - 1].equals("otr")) {
367 message.setEncryption(Message.ENCRYPTION_OTR);
368 } else {
369 message.setEncryption(Message.ENCRYPTION_PGP);
370 }
371 }
372 } else {
373 message.setType(Message.TYPE_FILE);
374 }
375 if (message.getType() == Message.TYPE_FILE) {
376 String suffix = "";
377 if (!fileNameElement.getContent().isEmpty()) {
378 String parts[] = fileNameElement.getContent().split("/");
379 suffix = parts[parts.length - 1];
380 if (message.getEncryption() == Message.ENCRYPTION_OTR && suffix.endsWith(".otr")) {
381 suffix = suffix.substring(0,suffix.length() - 4);
382 } else if (message.getEncryption() == Message.ENCRYPTION_PGP && (suffix.endsWith(".pgp") || suffix.endsWith(".gpg"))) {
383 suffix = suffix.substring(0,suffix.length() - 4);
384 }
385 }
386 message.setRelativeFilePath(message.getUuid()+"_"+suffix);
387 }
388 long size = Long.parseLong(fileSize.getContent());
389 message.setBody(Long.toString(size));
390 conversation.add(message);
391 mJingleConnectionManager.updateConversationUi(true);
392 if (mJingleConnectionManager.hasStoragePermission()
393 && size < this.mJingleConnectionManager.getAutoAcceptFileSize()
394 && mXmppConnectionService.isDataSaverDisabled()) {
395 Log.d(Config.LOGTAG, "auto accepting file from "+ packet.getFrom());
396 this.acceptedAutomatically = true;
397 this.sendAccept();
398 } else {
399 message.markUnread();
400 Log.d(Config.LOGTAG,
401 "not auto accepting new file offer with size: "
402 + size
403 + " allowed size:"
404 + this.mJingleConnectionManager
405 .getAutoAcceptFileSize());
406 this.mXmppConnectionService.getNotificationService().push(message);
407 }
408 this.file = this.mXmppConnectionService.getFileBackend().getFile(message, false);
409 if (mXmppAxolotlMessage != null) {
410 XmppAxolotlMessage.XmppAxolotlKeyTransportMessage transportMessage = account.getAxolotlService().processReceivingKeyTransportMessage(mXmppAxolotlMessage);
411 if (transportMessage != null) {
412 message.setEncryption(Message.ENCRYPTION_AXOLOTL);
413 this.file.setKey(transportMessage.getKey());
414 this.file.setIv(transportMessage.getIv());
415 message.setFingerprint(transportMessage.getFingerprint());
416 } else {
417 Log.d(Config.LOGTAG,"could not process KeyTransportMessage");
418 }
419 } else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
420 byte[] key = conversation.getSymmetricKey();
421 if (key == null) {
422 this.sendCancel();
423 this.fail();
424 return;
425 } else {
426 this.file.setKeyAndIv(key);
427 }
428 }
429 this.mFileOutputStream = AbstractConnectionManager.createOutputStream(this.file,message.getEncryption() == Message.ENCRYPTION_AXOLOTL);
430 if (message.getEncryption() == Message.ENCRYPTION_OTR && Config.REPORT_WRONG_FILESIZE_IN_OTR_JINGLE) {
431 this.file.setExpectedSize((size / 16 + 1) * 16);
432 } else {
433 this.file.setExpectedSize(size);
434 }
435 Log.d(Config.LOGTAG, "receiving file: expecting size of " + this.file.getExpectedSize());
436 } else {
437 this.sendCancel();
438 this.fail();
439 }
440 } else {
441 this.sendCancel();
442 this.fail();
443 }
444 }
445
446 private void sendInitRequest() {
447 JinglePacket packet = this.bootstrapPacket("session-initiate");
448 Content content = new Content(this.contentCreator, this.contentName);
449 if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
450 content.setTransportId(this.transportId);
451 this.file = this.mXmppConnectionService.getFileBackend().getFile(message, false);
452 Pair<InputStream,Integer> pair;
453 try {
454 if (message.getEncryption() == Message.ENCRYPTION_OTR) {
455 Conversation conversation = this.message.getConversation();
456 if (!this.mXmppConnectionService.renewSymmetricKey(conversation)) {
457 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not set symmetric key");
458 cancel();
459 }
460 this.file.setKeyAndIv(conversation.getSymmetricKey());
461 pair = AbstractConnectionManager.createInputStream(this.file, false);
462 this.file.setExpectedSize(pair.second);
463 content.setFileOffer(this.file, true, this.ftVersion);
464 } else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
465 this.file.setKey(mXmppAxolotlMessage.getInnerKey());
466 this.file.setIv(mXmppAxolotlMessage.getIV());
467 pair = AbstractConnectionManager.createInputStream(this.file, true);
468 this.file.setExpectedSize(pair.second);
469 content.setFileOffer(this.file, false, this.ftVersion).addChild(mXmppAxolotlMessage.toElement());
470 } else {
471 pair = AbstractConnectionManager.createInputStream(this.file, false);
472 this.file.setExpectedSize(pair.second);
473 content.setFileOffer(this.file, false, this.ftVersion);
474 }
475 } catch (FileNotFoundException e) {
476 cancel();
477 return;
478 }
479 this.mFileInputStream = pair.first;
480 content.setTransportId(this.transportId);
481 content.socks5transport().setChildren(getCandidatesAsElements());
482 packet.setContent(content);
483 this.sendJinglePacket(packet,new OnIqPacketReceived() {
484
485 @Override
486 public void onIqPacketReceived(Account account, IqPacket packet) {
487 if (packet.getType() == IqPacket.TYPE.RESULT) {
488 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": other party received offer");
489 mJingleStatus = JINGLE_STATUS_INITIATED;
490 mXmppConnectionService.markMessage(message, Message.STATUS_OFFERED);
491 } else {
492 fail(IqParser.extractErrorMessage(packet));
493 }
494 }
495 });
496
497 }
498 }
499
500 private List<Element> getCandidatesAsElements() {
501 List<Element> elements = new ArrayList<>();
502 for (JingleCandidate c : this.candidates) {
503 if (c.isOurs()) {
504 elements.add(c.toElement());
505 }
506 }
507 return elements;
508 }
509
510 private void sendAccept() {
511 mJingleStatus = JINGLE_STATUS_ACCEPTED;
512 this.mStatus = Transferable.STATUS_DOWNLOADING;
513 this.mJingleConnectionManager.updateConversationUi(true);
514 this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() {
515 @Override
516 public void onPrimaryCandidateFound(boolean success, final JingleCandidate candidate) {
517 final JinglePacket packet = bootstrapPacket("session-accept");
518 final Content content = new Content(contentCreator,contentName);
519 content.setFileOffer(fileOffer, ftVersion);
520 content.setTransportId(transportId);
521 if (success && candidate != null && !equalCandidateExists(candidate)) {
522 final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
523 JingleConnection.this,
524 candidate);
525 connections.put(candidate.getCid(), socksConnection);
526 socksConnection.connect(new OnTransportConnected() {
527
528 @Override
529 public void failed() {
530 Log.d(Config.LOGTAG,"connection to our own primary candidate failed");
531 content.socks5transport().setChildren(getCandidatesAsElements());
532 packet.setContent(content);
533 sendJinglePacket(packet);
534 connectNextCandidate();
535 }
536
537 @Override
538 public void established() {
539 Log.d(Config.LOGTAG, "connected to primary candidate");
540 mergeCandidate(candidate);
541 content.socks5transport().setChildren(getCandidatesAsElements());
542 packet.setContent(content);
543 sendJinglePacket(packet);
544 connectNextCandidate();
545 }
546 });
547 } else {
548 Log.d(Config.LOGTAG,"did not find a primary candidate for ourself");
549 content.socks5transport().setChildren(getCandidatesAsElements());
550 packet.setContent(content);
551 sendJinglePacket(packet);
552 connectNextCandidate();
553 }
554 }
555 });
556 }
557
558 private JinglePacket bootstrapPacket(String action) {
559 JinglePacket packet = new JinglePacket();
560 packet.setAction(action);
561 packet.setFrom(account.getJid());
562 packet.setTo(this.message.getCounterpart());
563 packet.setSessionId(this.sessionId);
564 packet.setInitiator(this.initiator);
565 return packet;
566 }
567
568 private void sendJinglePacket(JinglePacket packet) {
569 mXmppConnectionService.sendIqPacket(account,packet,responseListener);
570 }
571
572 private void sendJinglePacket(JinglePacket packet, OnIqPacketReceived callback) {
573 mXmppConnectionService.sendIqPacket(account,packet,callback);
574 }
575
576 private boolean receiveAccept(JinglePacket packet) {
577 Content content = packet.getJingleContent();
578 mergeCandidates(JingleCandidate.parse(content.socks5transport()
579 .getChildren()));
580 this.mJingleStatus = JINGLE_STATUS_ACCEPTED;
581 mXmppConnectionService.markMessage(message, Message.STATUS_UNSEND);
582 this.connectNextCandidate();
583 return true;
584 }
585
586 private boolean receiveTransportInfo(JinglePacket packet) {
587 Content content = packet.getJingleContent();
588 if (content.hasSocks5Transport()) {
589 if (content.socks5transport().hasChild("activated")) {
590 if ((this.transport != null) && (this.transport instanceof JingleSocks5Transport)) {
591 onProxyActivated.success();
592 } else {
593 String cid = content.socks5transport().findChild("activated").getAttribute("cid");
594 Log.d(Config.LOGTAG, "received proxy activated (" + cid
595 + ")prior to choosing our own transport");
596 JingleSocks5Transport connection = this.connections.get(cid);
597 if (connection != null) {
598 connection.setActivated(true);
599 } else {
600 Log.d(Config.LOGTAG, "activated connection not found");
601 this.sendCancel();
602 this.fail();
603 }
604 }
605 return true;
606 } else if (content.socks5transport().hasChild("proxy-error")) {
607 onProxyActivated.failed();
608 return true;
609 } else if (content.socks5transport().hasChild("candidate-error")) {
610 Log.d(Config.LOGTAG, "received candidate error");
611 this.receivedCandidate = true;
612 if ((mJingleStatus == JINGLE_STATUS_ACCEPTED)
613 && (this.sentCandidate)) {
614 this.connect();
615 }
616 return true;
617 } else if (content.socks5transport().hasChild("candidate-used")) {
618 String cid = content.socks5transport()
619 .findChild("candidate-used").getAttribute("cid");
620 if (cid != null) {
621 Log.d(Config.LOGTAG, "candidate used by counterpart:" + cid);
622 JingleCandidate candidate = getCandidate(cid);
623 if (candidate == null) {
624 Log.d(Config.LOGTAG,"could not find candidate with cid="+cid);
625 return false;
626 }
627 candidate.flagAsUsedByCounterpart();
628 this.receivedCandidate = true;
629 if ((mJingleStatus == JINGLE_STATUS_ACCEPTED)
630 && (this.sentCandidate)) {
631 this.connect();
632 } else {
633 Log.d(Config.LOGTAG,
634 "ignoring because file is already in transmission or we haven't sent our candidate yet");
635 }
636 return true;
637 } else {
638 return false;
639 }
640 } else {
641 return false;
642 }
643 } else {
644 return true;
645 }
646 }
647
648 private void connect() {
649 final JingleSocks5Transport connection = chooseConnection();
650 this.transport = connection;
651 if (connection == null) {
652 Log.d(Config.LOGTAG, "could not find suitable candidate");
653 this.disconnectSocks5Connections();
654 if (this.initiator.equals(account.getJid())) {
655 this.sendFallbackToIbb();
656 }
657 } else {
658 this.mJingleStatus = JINGLE_STATUS_TRANSMITTING;
659 if (connection.needsActivation()) {
660 if (connection.getCandidate().isOurs()) {
661 final String sid;
662 if (ftVersion == Content.Version.FT_3) {
663 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": use session ID instead of transport ID to activate proxy");
664 sid = getSessionId();
665 } else {
666 sid = getTransportId();
667 }
668 Log.d(Config.LOGTAG, "candidate "
669 + connection.getCandidate().getCid()
670 + " was our proxy. going to activate");
671 IqPacket activation = new IqPacket(IqPacket.TYPE.SET);
672 activation.setTo(connection.getCandidate().getJid());
673 activation.query("http://jabber.org/protocol/bytestreams")
674 .setAttribute("sid", sid);
675 activation.query().addChild("activate")
676 .setContent(this.getCounterPart().toString());
677 mXmppConnectionService.sendIqPacket(account,activation,
678 new OnIqPacketReceived() {
679
680 @Override
681 public void onIqPacketReceived(Account account,
682 IqPacket packet) {
683 if (packet.getType() != IqPacket.TYPE.RESULT) {
684 onProxyActivated.failed();
685 } else {
686 onProxyActivated.success();
687 sendProxyActivated(connection.getCandidate().getCid());
688 }
689 }
690 });
691 } else {
692 Log.d(Config.LOGTAG,
693 "candidate "
694 + connection.getCandidate().getCid()
695 + " was a proxy. waiting for other party to activate");
696 }
697 } else {
698 if (initiator.equals(account.getJid())) {
699 Log.d(Config.LOGTAG, "we were initiating. sending file");
700 connection.send(file, onFileTransmissionSatusChanged);
701 } else {
702 Log.d(Config.LOGTAG, "we were responding. receiving file");
703 connection.receive(file, onFileTransmissionSatusChanged);
704 }
705 }
706 }
707 }
708
709 private JingleSocks5Transport chooseConnection() {
710 JingleSocks5Transport connection = null;
711 for (Entry<String, JingleSocks5Transport> cursor : connections
712 .entrySet()) {
713 JingleSocks5Transport currentConnection = cursor.getValue();
714 // Log.d(Config.LOGTAG,"comparing candidate: "+currentConnection.getCandidate().toString());
715 if (currentConnection.isEstablished()
716 && (currentConnection.getCandidate().isUsedByCounterpart() || (!currentConnection
717 .getCandidate().isOurs()))) {
718 // Log.d(Config.LOGTAG,"is usable");
719 if (connection == null) {
720 connection = currentConnection;
721 } else {
722 if (connection.getCandidate().getPriority() < currentConnection
723 .getCandidate().getPriority()) {
724 connection = currentConnection;
725 } else if (connection.getCandidate().getPriority() == currentConnection
726 .getCandidate().getPriority()) {
727 // Log.d(Config.LOGTAG,"found two candidates with same priority");
728 if (initiator.equals(account.getJid())) {
729 if (currentConnection.getCandidate().isOurs()) {
730 connection = currentConnection;
731 }
732 } else {
733 if (!currentConnection.getCandidate().isOurs()) {
734 connection = currentConnection;
735 }
736 }
737 }
738 }
739 }
740 }
741 return connection;
742 }
743
744 private void sendSuccess() {
745 JinglePacket packet = bootstrapPacket("session-terminate");
746 Reason reason = new Reason();
747 reason.addChild("success");
748 packet.setReason(reason);
749 this.sendJinglePacket(packet);
750 this.disconnectSocks5Connections();
751 this.mJingleStatus = JINGLE_STATUS_FINISHED;
752 this.message.setStatus(Message.STATUS_RECEIVED);
753 this.message.setTransferable(null);
754 this.mXmppConnectionService.updateMessage(message);
755 this.mJingleConnectionManager.finishConnection(this);
756 }
757
758 private void sendFallbackToIbb() {
759 Log.d(Config.LOGTAG, "sending fallback to ibb");
760 JinglePacket packet = this.bootstrapPacket("transport-replace");
761 Content content = new Content(this.contentCreator, this.contentName);
762 this.transportId = this.mJingleConnectionManager.nextRandomId();
763 content.setTransportId(this.transportId);
764 content.ibbTransport().setAttribute("block-size",
765 Integer.toString(this.ibbBlockSize));
766 packet.setContent(content);
767 this.sendJinglePacket(packet);
768 }
769
770 private boolean receiveFallbackToIbb(JinglePacket packet) {
771 Log.d(Config.LOGTAG, "receiving fallack to ibb");
772 String receivedBlockSize = packet.getJingleContent().ibbTransport()
773 .getAttribute("block-size");
774 if (receivedBlockSize != null) {
775 int bs = Integer.parseInt(receivedBlockSize);
776 if (bs > this.ibbBlockSize) {
777 this.ibbBlockSize = bs;
778 }
779 }
780 this.transportId = packet.getJingleContent().getTransportId();
781 this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
782 this.transport.receive(file, onFileTransmissionSatusChanged);
783 JinglePacket answer = bootstrapPacket("transport-accept");
784 Content content = new Content("initiator", "a-file-offer");
785 content.setTransportId(this.transportId);
786 content.ibbTransport().setAttribute("block-size",this.ibbBlockSize);
787 answer.setContent(content);
788 this.sendJinglePacket(answer);
789 return true;
790 }
791
792 private boolean receiveTransportAccept(JinglePacket packet) {
793 if (packet.getJingleContent().hasIbbTransport()) {
794 String receivedBlockSize = packet.getJingleContent().ibbTransport()
795 .getAttribute("block-size");
796 if (receivedBlockSize != null) {
797 int bs = Integer.parseInt(receivedBlockSize);
798 if (bs > this.ibbBlockSize) {
799 this.ibbBlockSize = bs;
800 }
801 }
802 this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
803 this.transport.connect(new OnTransportConnected() {
804
805 @Override
806 public void failed() {
807 Log.d(Config.LOGTAG, "ibb open failed");
808 }
809
810 @Override
811 public void established() {
812 JingleConnection.this.transport.send(file,
813 onFileTransmissionSatusChanged);
814 }
815 });
816 return true;
817 } else {
818 return false;
819 }
820 }
821
822 private void receiveSuccess() {
823 this.mJingleStatus = JINGLE_STATUS_FINISHED;
824 this.mXmppConnectionService.markMessage(this.message,Message.STATUS_SEND_RECEIVED);
825 this.disconnectSocks5Connections();
826 if (this.transport != null && this.transport instanceof JingleInbandTransport) {
827 this.transport.disconnect();
828 }
829 this.message.setTransferable(null);
830 this.mJingleConnectionManager.finishConnection(this);
831 }
832
833 public void cancel() {
834 this.disconnectSocks5Connections();
835 if (this.transport != null && this.transport instanceof JingleInbandTransport) {
836 this.transport.disconnect();
837 }
838 this.sendCancel();
839 this.mJingleConnectionManager.finishConnection(this);
840 if (this.responder.equals(account.getJid())) {
841 this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
842 if (this.file!=null) {
843 file.delete();
844 }
845 this.mJingleConnectionManager.updateConversationUi(true);
846 } else {
847 this.mXmppConnectionService.markMessage(this.message,
848 Message.STATUS_SEND_FAILED);
849 this.message.setTransferable(null);
850 }
851 }
852
853 private void fail() {
854 fail(null);
855 }
856
857 private void fail(String errorMessage) {
858 this.mJingleStatus = JINGLE_STATUS_FAILED;
859 this.disconnectSocks5Connections();
860 if (this.transport != null && this.transport instanceof JingleInbandTransport) {
861 this.transport.disconnect();
862 }
863 FileBackend.close(mFileInputStream);
864 FileBackend.close(mFileOutputStream);
865 if (this.message != null) {
866 if (this.responder.equals(account.getJid())) {
867 this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
868 if (this.file!=null) {
869 file.delete();
870 }
871 this.mJingleConnectionManager.updateConversationUi(true);
872 } else {
873 this.mXmppConnectionService.markMessage(this.message,
874 Message.STATUS_SEND_FAILED,
875 errorMessage);
876 this.message.setTransferable(null);
877 }
878 }
879 this.mJingleConnectionManager.finishConnection(this);
880 }
881
882 private void sendCancel() {
883 JinglePacket packet = bootstrapPacket("session-terminate");
884 Reason reason = new Reason();
885 reason.addChild("cancel");
886 packet.setReason(reason);
887 this.sendJinglePacket(packet);
888 }
889
890 private void connectNextCandidate() {
891 for (JingleCandidate candidate : this.candidates) {
892 if ((!connections.containsKey(candidate.getCid()) && (!candidate
893 .isOurs()))) {
894 this.connectWithCandidate(candidate);
895 return;
896 }
897 }
898 this.sendCandidateError();
899 }
900
901 private void connectWithCandidate(final JingleCandidate candidate) {
902 final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
903 this, candidate);
904 connections.put(candidate.getCid(), socksConnection);
905 socksConnection.connect(new OnTransportConnected() {
906
907 @Override
908 public void failed() {
909 Log.d(Config.LOGTAG,
910 "connection failed with " + candidate.getHost() + ":"
911 + candidate.getPort());
912 connectNextCandidate();
913 }
914
915 @Override
916 public void established() {
917 Log.d(Config.LOGTAG,
918 "established connection with " + candidate.getHost()
919 + ":" + candidate.getPort());
920 sendCandidateUsed(candidate.getCid());
921 }
922 });
923 }
924
925 private void disconnectSocks5Connections() {
926 Iterator<Entry<String, JingleSocks5Transport>> it = this.connections
927 .entrySet().iterator();
928 while (it.hasNext()) {
929 Entry<String, JingleSocks5Transport> pairs = it.next();
930 pairs.getValue().disconnect();
931 it.remove();
932 }
933 }
934
935 private void sendProxyActivated(String cid) {
936 JinglePacket packet = bootstrapPacket("transport-info");
937 Content content = new Content(this.contentCreator, this.contentName);
938 content.setTransportId(this.transportId);
939 content.socks5transport().addChild("activated")
940 .setAttribute("cid", cid);
941 packet.setContent(content);
942 this.sendJinglePacket(packet);
943 }
944
945 private void sendCandidateUsed(final String cid) {
946 JinglePacket packet = bootstrapPacket("transport-info");
947 Content content = new Content(this.contentCreator, this.contentName);
948 content.setTransportId(this.transportId);
949 content.socks5transport().addChild("candidate-used")
950 .setAttribute("cid", cid);
951 packet.setContent(content);
952 this.sentCandidate = true;
953 if ((receivedCandidate) && (mJingleStatus == JINGLE_STATUS_ACCEPTED)) {
954 connect();
955 }
956 this.sendJinglePacket(packet);
957 }
958
959 private void sendCandidateError() {
960 JinglePacket packet = bootstrapPacket("transport-info");
961 Content content = new Content(this.contentCreator, this.contentName);
962 content.setTransportId(this.transportId);
963 content.socks5transport().addChild("candidate-error");
964 packet.setContent(content);
965 this.sentCandidate = true;
966 if ((receivedCandidate) && (mJingleStatus == JINGLE_STATUS_ACCEPTED)) {
967 connect();
968 }
969 this.sendJinglePacket(packet);
970 }
971
972 public Jid getInitiator() {
973 return this.initiator;
974 }
975
976 public Jid getResponder() {
977 return this.responder;
978 }
979
980 public int getJingleStatus() {
981 return this.mJingleStatus;
982 }
983
984 private boolean equalCandidateExists(JingleCandidate candidate) {
985 for (JingleCandidate c : this.candidates) {
986 if (c.equalValues(candidate)) {
987 return true;
988 }
989 }
990 return false;
991 }
992
993 private void mergeCandidate(JingleCandidate candidate) {
994 for (JingleCandidate c : this.candidates) {
995 if (c.equals(candidate)) {
996 return;
997 }
998 }
999 this.candidates.add(candidate);
1000 }
1001
1002 private void mergeCandidates(List<JingleCandidate> candidates) {
1003 for (JingleCandidate c : candidates) {
1004 mergeCandidate(c);
1005 }
1006 }
1007
1008 private JingleCandidate getCandidate(String cid) {
1009 for (JingleCandidate c : this.candidates) {
1010 if (c.getCid().equals(cid)) {
1011 return c;
1012 }
1013 }
1014 return null;
1015 }
1016
1017 public void updateProgress(int i) {
1018 this.mProgress = i;
1019 mJingleConnectionManager.updateConversationUi(false);
1020 }
1021
1022 public String getTransportId() {
1023 return this.transportId;
1024 }
1025
1026 public Content.Version getFtVersion() {
1027 return this.ftVersion;
1028 }
1029
1030 interface OnProxyActivated {
1031 public void success();
1032
1033 public void failed();
1034 }
1035
1036 public boolean hasTransportId(String sid) {
1037 return sid.equals(this.transportId);
1038 }
1039
1040 public JingleTransport getTransport() {
1041 return this.transport;
1042 }
1043
1044 public boolean start() {
1045 if (account.getStatus() == Account.State.ONLINE) {
1046 if (mJingleStatus == JINGLE_STATUS_INITIATED) {
1047 new Thread(new Runnable() {
1048
1049 @Override
1050 public void run() {
1051 sendAccept();
1052 }
1053 }).start();
1054 }
1055 return true;
1056 } else {
1057 return false;
1058 }
1059 }
1060
1061 @Override
1062 public int getStatus() {
1063 return this.mStatus;
1064 }
1065
1066 @Override
1067 public long getFileSize() {
1068 if (this.file != null) {
1069 return this.file.getExpectedSize();
1070 } else {
1071 return 0;
1072 }
1073 }
1074
1075 @Override
1076 public int getProgress() {
1077 return this.mProgress;
1078 }
1079
1080 public AbstractConnectionManager getConnectionManager() {
1081 return this.mJingleConnectionManager;
1082 }
1083}