1package eu.siacs.conversations.xmpp.jingle;
2
3import android.util.Base64;
4import android.util.Log;
5
6import java.io.FileInputStream;
7import java.io.FileNotFoundException;
8import java.io.IOException;
9import java.io.InputStream;
10import java.io.OutputStream;
11import java.util.ArrayList;
12import java.util.Arrays;
13import java.util.Collections;
14import java.util.Iterator;
15import java.util.List;
16import java.util.Map.Entry;
17import java.util.concurrent.ConcurrentHashMap;
18
19import eu.siacs.conversations.Config;
20import eu.siacs.conversations.crypto.axolotl.AxolotlService;
21import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
22import eu.siacs.conversations.entities.Account;
23import eu.siacs.conversations.entities.Conversation;
24import eu.siacs.conversations.entities.DownloadableFile;
25import eu.siacs.conversations.entities.Message;
26import eu.siacs.conversations.entities.Presence;
27import eu.siacs.conversations.entities.ServiceDiscoveryResult;
28import eu.siacs.conversations.entities.Transferable;
29import eu.siacs.conversations.entities.TransferablePlaceholder;
30import eu.siacs.conversations.parser.IqParser;
31import eu.siacs.conversations.persistance.FileBackend;
32import eu.siacs.conversations.services.AbstractConnectionManager;
33import eu.siacs.conversations.services.XmppConnectionService;
34import eu.siacs.conversations.utils.CryptoHelper;
35import eu.siacs.conversations.xml.Element;
36import eu.siacs.conversations.xml.Namespace;
37import eu.siacs.conversations.xmpp.OnIqPacketReceived;
38import eu.siacs.conversations.xmpp.jingle.stanzas.Content;
39import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
40import eu.siacs.conversations.xmpp.jingle.stanzas.Reason;
41import eu.siacs.conversations.xmpp.stanzas.IqPacket;
42import rocks.xmpp.addr.Jid;
43
44public class JingleConnection implements Transferable {
45
46 private static final String JET_OMEMO_CIPHER = "urn:xmpp:ciphers:aes-128-gcm-nopadding";
47
48 private static final int JINGLE_STATUS_INITIATED = 0;
49 private static final int JINGLE_STATUS_ACCEPTED = 1;
50 private static final int JINGLE_STATUS_FINISHED = 4;
51 static final int JINGLE_STATUS_TRANSMITTING = 5;
52 private static final int JINGLE_STATUS_FAILED = 99;
53 private static final int JINGLE_STATUS_OFFERED = -1;
54 private JingleConnectionManager mJingleConnectionManager;
55 private XmppConnectionService mXmppConnectionService;
56 private Content.Version ftVersion = Content.Version.FT_3;
57
58 private int ibbBlockSize = 8192;
59
60 private int mJingleStatus = JINGLE_STATUS_OFFERED;
61 private int mStatus = Transferable.STATUS_UNKNOWN;
62 private Message message;
63 private String sessionId;
64 private Account account;
65 private Jid initiator;
66 private Jid responder;
67 private List<JingleCandidate> candidates = new ArrayList<>();
68 private ConcurrentHashMap<String, JingleSocks5Transport> connections = new ConcurrentHashMap<>();
69
70 private String transportId;
71 private Element fileOffer;
72 private DownloadableFile file = null;
73
74 private String contentName;
75 private String contentCreator;
76 private Transport initialTransport;
77 private boolean remoteSupportsOmemoJet;
78
79 private int mProgress = 0;
80
81 private boolean receivedCandidate = false;
82 private boolean sentCandidate = false;
83
84 private boolean acceptedAutomatically = false;
85 private boolean cancelled = false;
86
87 private XmppAxolotlMessage mXmppAxolotlMessage;
88
89 private JingleTransport transport = null;
90
91 private OutputStream mFileOutputStream;
92 private InputStream mFileInputStream;
93
94 private OnIqPacketReceived responseListener = (account, packet) -> {
95 if (packet.getType() != IqPacket.TYPE.RESULT) {
96 fail(IqParser.extractErrorMessage(packet));
97 }
98 };
99 private byte[] expectedHash = new byte[0];
100 private final OnFileTransmissionStatusChanged onFileTransmissionStatusChanged = new OnFileTransmissionStatusChanged() {
101
102 @Override
103 public void onFileTransmitted(DownloadableFile file) {
104 if (responding()) {
105 if (expectedHash.length > 0 && !Arrays.equals(expectedHash, file.getSha1Sum())) {
106 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": hashes did not match");
107 }
108 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": file transmitted(). we are responding");
109 sendSuccess();
110 mXmppConnectionService.getFileBackend().updateFileParams(message);
111 mXmppConnectionService.databaseBackend.createMessage(message);
112 mXmppConnectionService.markMessage(message, Message.STATUS_RECEIVED);
113 if (acceptedAutomatically) {
114 message.markUnread();
115 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
116 account.getPgpDecryptionService().decrypt(message, true);
117 } else {
118 mXmppConnectionService.getFileBackend().updateMediaScanner(file, () -> JingleConnection.this.mXmppConnectionService.getNotificationService().push(message));
119
120 }
121 Log.d(Config.LOGTAG, "successfully transmitted file:" + file.getAbsolutePath() + " (" + CryptoHelper.bytesToHex(file.getSha1Sum()) + ")");
122 return;
123 } else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
124 account.getPgpDecryptionService().decrypt(message, true);
125 }
126 } else {
127 if (ftVersion == Content.Version.FT_5) { //older Conversations will break when receiving a session-info
128 sendHash();
129 }
130 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
131 account.getPgpDecryptionService().decrypt(message, false);
132 }
133 if (message.getEncryption() == Message.ENCRYPTION_PGP || message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
134 file.delete();
135 }
136 }
137 Log.d(Config.LOGTAG, "successfully transmitted file:" + file.getAbsolutePath() + " (" + CryptoHelper.bytesToHex(file.getSha1Sum()) + ")");
138 if (message.getEncryption() != Message.ENCRYPTION_PGP) {
139 mXmppConnectionService.getFileBackend().updateMediaScanner(file);
140 }
141 }
142
143 @Override
144 public void onFileTransferAborted() {
145 JingleConnection.this.sendSessionTerminate("connectivity-error");
146 JingleConnection.this.fail();
147 }
148 };
149 private OnTransportConnected onIbbTransportConnected = new OnTransportConnected() {
150 @Override
151 public void failed() {
152 Log.d(Config.LOGTAG, "ibb open failed");
153 }
154
155 @Override
156 public void established() {
157 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ibb transport connected. sending file");
158 mJingleStatus = JINGLE_STATUS_TRANSMITTING;
159 JingleConnection.this.transport.send(file, onFileTransmissionStatusChanged);
160 }
161 };
162 private OnProxyActivated onProxyActivated = new OnProxyActivated() {
163
164 @Override
165 public void success() {
166 if (initiator.equals(account.getJid())) {
167 Log.d(Config.LOGTAG, "we were initiating. sending file");
168 transport.send(file, onFileTransmissionStatusChanged);
169 } else {
170 transport.receive(file, onFileTransmissionStatusChanged);
171 Log.d(Config.LOGTAG, "we were responding. receiving file");
172 }
173 }
174
175 @Override
176 public void failed() {
177 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": proxy activation failed");
178 if (initiating()) {
179 sendFallbackToIbb();
180 }
181 }
182 };
183
184 public JingleConnection(JingleConnectionManager mJingleConnectionManager) {
185 this.mJingleConnectionManager = mJingleConnectionManager;
186 this.mXmppConnectionService = mJingleConnectionManager
187 .getXmppConnectionService();
188 }
189
190 private boolean responding() {
191 return responder != null && responder.equals(account.getJid());
192 }
193
194 private boolean initiating() {
195 return initiator.equals(account.getJid());
196 }
197
198 InputStream getFileInputStream() {
199 return this.mFileInputStream;
200 }
201
202 OutputStream getFileOutputStream() throws IOException {
203 if (this.file == null) {
204 Log.d(Config.LOGTAG, "file object was not assigned");
205 return null;
206 }
207 this.file.getParentFile().mkdirs();
208 this.file.createNewFile();
209 this.mFileOutputStream = AbstractConnectionManager.createOutputStream(this.file);
210 return this.mFileOutputStream;
211 }
212
213 public String getSessionId() {
214 return this.sessionId;
215 }
216
217 public Account getAccount() {
218 return this.account;
219 }
220
221 public Jid getCounterPart() {
222 return this.message.getCounterpart();
223 }
224
225 void deliverPacket(JinglePacket packet) {
226 if (packet.isAction("session-terminate")) {
227 Reason reason = packet.getReason();
228 if (reason != null) {
229 if (reason.hasChild("cancel")) {
230 this.cancelled = true;
231 this.fail();
232 } else if (reason.hasChild("success")) {
233 this.receiveSuccess();
234 } else {
235 this.fail(reason.getName());
236 }
237 } else {
238 this.fail();
239 }
240 } else if (packet.isAction("session-accept")) {
241 receiveAccept(packet);
242 } else if (packet.isAction("session-info")) {
243 final Element checksum = packet.getChecksum();
244 final Element file = checksum == null ? null : checksum.findChild("file");
245 final Element hash = file == null ? null : file.findChild("hash", "urn:xmpp:hashes:2");
246 if (hash != null && "sha-1".equalsIgnoreCase(hash.getAttribute("algo"))) {
247 try {
248 this.expectedHash = Base64.decode(hash.getContent(), Base64.DEFAULT);
249 } catch (Exception e) {
250 this.expectedHash = new byte[0];
251 }
252 }
253 respondToIq(packet, true);
254 } else if (packet.isAction("transport-info")) {
255 receiveTransportInfo(packet);
256 } else if (packet.isAction("transport-replace")) {
257 if (packet.getJingleContent().hasIbbTransport()) {
258 receiveFallbackToIbb(packet);
259 } else {
260 Log.d(Config.LOGTAG, "trying to fallback to something unknown" + packet.toString());
261 respondToIq(packet, false);
262 }
263 } else if (packet.isAction("transport-accept")) {
264 receiveTransportAccept(packet);
265 } else {
266 Log.d(Config.LOGTAG, "packet arrived in connection. action was " + packet.getAction());
267 respondToIq(packet, false);
268 }
269 }
270
271 private void respondToIq(final IqPacket packet, final boolean result) {
272 final IqPacket response;
273 if (result) {
274 response = packet.generateResponse(IqPacket.TYPE.RESULT);
275 } else {
276 response = packet.generateResponse(IqPacket.TYPE.ERROR);
277 final Element error = response.addChild("error").setAttribute("type", "cancel");
278 error.addChild("not-acceptable", "urn:ietf:params:xml:ns:xmpp-stanzas");
279 }
280 mXmppConnectionService.sendIqPacket(account, response, null);
281 }
282
283 private void respondToIqWithOutOfOrder(final IqPacket packet) {
284 final IqPacket response = packet.generateResponse(IqPacket.TYPE.ERROR);
285 final Element error = response.addChild("error").setAttribute("type", "wait");
286 error.addChild("unexpected-request", "urn:ietf:params:xml:ns:xmpp-stanzas");
287 error.addChild("out-of-order", "urn:xmpp:jingle:errors:1");
288 mXmppConnectionService.sendIqPacket(account, response, null);
289 }
290
291 public void init(final Message message) {
292 if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
293 Conversation conversation = (Conversation) message.getConversation();
294 conversation.getAccount().getAxolotlService().prepareKeyTransportMessage(conversation, xmppAxolotlMessage -> {
295 if (xmppAxolotlMessage != null) {
296 init(message, xmppAxolotlMessage);
297 } else {
298 fail();
299 }
300 });
301 } else {
302 init(message, null);
303 }
304 }
305
306 private void init(Message message, XmppAxolotlMessage xmppAxolotlMessage) {
307 this.mXmppAxolotlMessage = xmppAxolotlMessage;
308 this.contentCreator = "initiator";
309 this.contentName = this.mJingleConnectionManager.nextRandomId();
310 this.message = message;
311 this.account = message.getConversation().getAccount();
312 final List<String> remoteFeatures = getRemoteFeatures();
313 upgradeNamespace(remoteFeatures);
314 this.initialTransport = remoteFeatures.contains(Namespace.JINGLE_TRANSPORTS_S5B) ? Transport.SOCKS : Transport.IBB;
315 this.remoteSupportsOmemoJet = remoteFeatures.contains(Namespace.JINGLE_ENCRYPTED_TRANSPORT_OMEMO);
316 this.message.setTransferable(this);
317 this.mStatus = Transferable.STATUS_UPLOADING;
318 this.initiator = this.account.getJid();
319 this.responder = this.message.getCounterpart();
320 this.sessionId = this.mJingleConnectionManager.nextRandomId();
321 this.transportId = this.mJingleConnectionManager.nextRandomId();
322 if (this.initialTransport == Transport.IBB) {
323 this.sendInitRequest();
324 } else {
325 gatherAndConnectDirectCandidates();
326 this.mJingleConnectionManager.getPrimaryCandidate(account, initiating(), (success, candidate) -> {
327 if (success) {
328 final JingleSocks5Transport socksConnection = new JingleSocks5Transport(this, candidate);
329 connections.put(candidate.getCid(), socksConnection);
330 socksConnection.connect(new OnTransportConnected() {
331
332 @Override
333 public void failed() {
334 Log.d(Config.LOGTAG, String.format("connection to our own proxy65 candidate failed (%s:%d)", candidate.getHost(), candidate.getPort()));
335 sendInitRequest();
336 }
337
338 @Override
339 public void established() {
340 Log.d(Config.LOGTAG, "successfully connected to our own proxy65 candidate");
341 mergeCandidate(candidate);
342 sendInitRequest();
343 }
344 });
345 mergeCandidate(candidate);
346 } else {
347 Log.d(Config.LOGTAG, "no proxy65 candidate of our own was found");
348 sendInitRequest();
349 }
350 });
351 }
352
353 }
354
355 private void gatherAndConnectDirectCandidates() {
356 final List<JingleCandidate> directCandidates;
357 if (Config.USE_DIRECT_JINGLE_CANDIDATES) {
358 if (account.isOnion() || mXmppConnectionService.useTorToConnect()) {
359 directCandidates = Collections.emptyList();
360 } else {
361 directCandidates = DirectConnectionUtils.getLocalCandidates(account.getJid());
362 }
363 } else {
364 directCandidates = Collections.emptyList();
365 }
366 for (JingleCandidate directCandidate : directCandidates) {
367 final JingleSocks5Transport socksConnection = new JingleSocks5Transport(this, directCandidate);
368 connections.put(directCandidate.getCid(), socksConnection);
369 candidates.add(directCandidate);
370 }
371 }
372
373 private void upgradeNamespace(List<String> remoteFeatures) {
374 if (remoteFeatures.contains(Content.Version.FT_5.getNamespace())) {
375 this.ftVersion = Content.Version.FT_5;
376 } else if (remoteFeatures.contains(Content.Version.FT_4.getNamespace())) {
377 this.ftVersion = Content.Version.FT_4;
378 }
379 }
380
381 private List<String> getRemoteFeatures() {
382 Jid jid = this.message.getCounterpart();
383 String resource = jid != null ? jid.getResource() : null;
384 if (resource != null) {
385 Presence presence = this.account.getRoster().getContact(jid).getPresences().getPresences().get(resource);
386 ServiceDiscoveryResult result = presence != null ? presence.getServiceDiscoveryResult() : null;
387 return result == null ? Collections.emptyList() : result.getFeatures();
388 } else {
389 return Collections.emptyList();
390 }
391 }
392
393 public void init(Account account, JinglePacket packet) {
394 this.mJingleStatus = JINGLE_STATUS_INITIATED;
395 Conversation conversation = this.mXmppConnectionService
396 .findOrCreateConversation(account,
397 packet.getFrom().asBareJid(), false, false);
398 this.message = new Message(conversation, "", Message.ENCRYPTION_NONE);
399 this.message.setStatus(Message.STATUS_RECEIVED);
400 this.mStatus = Transferable.STATUS_OFFER;
401 this.message.setTransferable(this);
402 final Jid from = packet.getFrom();
403 this.message.setCounterpart(from);
404 this.account = account;
405 this.initiator = packet.getFrom();
406 this.responder = this.account.getJid();
407 this.sessionId = packet.getSessionId();
408 Content content = packet.getJingleContent();
409 this.contentCreator = content.getAttribute("creator");
410 this.initialTransport = content.hasSocks5Transport() ? Transport.SOCKS : Transport.IBB;
411 this.contentName = content.getAttribute("name");
412 this.transportId = content.getTransportId();
413
414
415 if (this.initialTransport == Transport.SOCKS) {
416 this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
417 } else if (this.initialTransport == Transport.IBB) {
418 final String receivedBlockSize = content.ibbTransport().getAttribute("block-size");
419 if (receivedBlockSize != null) {
420 try {
421 this.ibbBlockSize = Math.min(Integer.parseInt(receivedBlockSize), this.ibbBlockSize);
422 } catch (NumberFormatException e) {
423 Log.d(Config.LOGTAG, "number format exception " + e.getMessage());
424 respondToIq(packet, false);
425 this.fail();
426 return;
427 }
428 } else {
429 Log.d(Config.LOGTAG, "received block size was null");
430 respondToIq(packet, false);
431 this.fail();
432 return;
433 }
434 }
435 this.ftVersion = content.getVersion();
436 if (ftVersion == null) {
437 respondToIq(packet, false);
438 this.fail();
439 return;
440 }
441 this.fileOffer = content.getFileOffer(this.ftVersion);
442
443
444 if (fileOffer != null) {
445 boolean remoteIsUsingJet = false;
446 Element encrypted = fileOffer.findChild("encrypted", AxolotlService.PEP_PREFIX);
447 if (encrypted == null) {
448 final Element security = content.findChild("security", Namespace.JINGLE_ENCRYPTED_TRANSPORT);
449 if (security != null && AxolotlService.PEP_PREFIX.equals(security.getAttribute("type"))) {
450 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received jingle file offer with JET");
451 encrypted = security.findChild("encrypted", AxolotlService.PEP_PREFIX);
452 remoteIsUsingJet = true;
453 }
454 }
455 if (encrypted != null) {
456 this.mXmppAxolotlMessage = XmppAxolotlMessage.fromElement(encrypted, packet.getFrom().asBareJid());
457 }
458 Element fileSize = fileOffer.findChild("size");
459 final String path = fileOffer.findChildContent("name");
460 if (path != null) {
461 AbstractConnectionManager.Extension extension = AbstractConnectionManager.Extension.of(path);
462 if (VALID_IMAGE_EXTENSIONS.contains(extension.main)) {
463 message.setType(Message.TYPE_IMAGE);
464 message.setRelativeFilePath(message.getUuid() + "." + extension.main);
465 } else if (VALID_CRYPTO_EXTENSIONS.contains(extension.main)) {
466 if (VALID_IMAGE_EXTENSIONS.contains(extension.secondary)) {
467 message.setType(Message.TYPE_IMAGE);
468 message.setRelativeFilePath(message.getUuid() + "." + extension.secondary);
469 } else {
470 message.setType(Message.TYPE_FILE);
471 message.setRelativeFilePath(message.getUuid() + (extension.secondary != null ? ("." + extension.secondary) : ""));
472 }
473 message.setEncryption(Message.ENCRYPTION_PGP);
474 } else {
475 message.setType(Message.TYPE_FILE);
476 message.setRelativeFilePath(message.getUuid() + (extension.main != null ? ("." + extension.main) : ""));
477 }
478 long size = parseLong(fileSize, 0);
479 message.setBody(Long.toString(size));
480 conversation.add(message);
481 mJingleConnectionManager.updateConversationUi(true);
482 this.file = this.mXmppConnectionService.getFileBackend().getFile(message, false);
483 if (mXmppAxolotlMessage != null) {
484 XmppAxolotlMessage.XmppAxolotlKeyTransportMessage transportMessage = account.getAxolotlService().processReceivingKeyTransportMessage(mXmppAxolotlMessage, false);
485 if (transportMessage != null) {
486 message.setEncryption(Message.ENCRYPTION_AXOLOTL);
487 this.file.setKey(transportMessage.getKey());
488 this.file.setIv(transportMessage.getIv());
489 message.setFingerprint(transportMessage.getFingerprint());
490 } else {
491 Log.d(Config.LOGTAG, "could not process KeyTransportMessage");
492 }
493 }
494 message.resetFileParams();
495 //legacy OMEMO encrypted file transfers reported the file size after encryption
496 //JET reports the plain text size. however lower levels of our receiving code still
497 //expect the cipher text size. so we just + 16 bytes (auth tag size) here
498 this.file.setExpectedSize(size + (remoteIsUsingJet ? 16 : 0));
499
500 respondToIq(packet, true);
501
502 if (mJingleConnectionManager.hasStoragePermission()
503 && size < this.mJingleConnectionManager.getAutoAcceptFileSize()
504 && mXmppConnectionService.isDataSaverDisabled()) {
505 Log.d(Config.LOGTAG, "auto accepting file from " + packet.getFrom());
506 this.acceptedAutomatically = true;
507 this.sendAccept();
508 } else {
509 message.markUnread();
510 Log.d(Config.LOGTAG,
511 "not auto accepting new file offer with size: "
512 + size
513 + " allowed size:"
514 + this.mJingleConnectionManager
515 .getAutoAcceptFileSize());
516 this.mXmppConnectionService.getNotificationService().push(message);
517 }
518 Log.d(Config.LOGTAG, "receiving file: expecting size of " + this.file.getExpectedSize());
519 return;
520 }
521 respondToIq(packet, false);
522 }
523 }
524
525 private static long parseLong(final Element element, final long l) {
526 final String input = element == null ? null : element.getContent();
527 if (input == null) {
528 return l;
529 }
530 try {
531 return Long.parseLong(input);
532 } catch (Exception e) {
533 return l;
534 }
535 }
536
537 private void sendInitRequest() {
538 JinglePacket packet = this.bootstrapPacket("session-initiate");
539 Content content = new Content(this.contentCreator, this.contentName);
540 if (message.isFileOrImage()) {
541 content.setTransportId(this.transportId);
542 this.file = this.mXmppConnectionService.getFileBackend().getFile(message, false);
543 if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
544 this.file.setKey(mXmppAxolotlMessage.getInnerKey());
545 this.file.setIv(mXmppAxolotlMessage.getIV());
546 //legacy OMEMO encrypted file transfer reported file size of the encrypted file
547 //JET uses the file size of the plain text file. The difference is only 16 bytes (auth tag)
548 this.file.setExpectedSize(file.getSize() + (this.remoteSupportsOmemoJet ? 0 : 16));
549 final Element file = content.setFileOffer(this.file, false, this.ftVersion);
550 if (remoteSupportsOmemoJet) {
551 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote announced support for JET");
552 final Element security = new Element("security", Namespace.JINGLE_ENCRYPTED_TRANSPORT);
553 security.setAttribute("name", this.contentName);
554 security.setAttribute("cipher", JET_OMEMO_CIPHER);
555 security.setAttribute("type", AxolotlService.PEP_PREFIX);
556 security.addChild(mXmppAxolotlMessage.toElement());
557 content.addChild(security);
558 } else {
559 file.addChild(mXmppAxolotlMessage.toElement());
560 }
561 } else {
562 this.file.setExpectedSize(file.getSize());
563 content.setFileOffer(this.file, false, this.ftVersion);
564 }
565 message.resetFileParams();
566 try {
567 this.mFileInputStream = new FileInputStream(file);
568 } catch (FileNotFoundException e) {
569 fail(e.getMessage());
570 return;
571 }
572 content.setTransportId(this.transportId);
573 if (this.initialTransport == Transport.IBB) {
574 content.ibbTransport().setAttribute("block-size", Integer.toString(this.ibbBlockSize));
575 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending IBB offer");
576 } else {
577 final List<Element> candidates = getCandidatesAsElements();
578 Log.d(Config.LOGTAG, String.format("%s: sending S5B offer with %d candidates", account.getJid().asBareJid(), candidates.size()));
579 content.socks5transport().setChildren(candidates);
580 }
581 packet.setContent(content);
582 this.sendJinglePacket(packet, (account, response) -> {
583 if (response.getType() == IqPacket.TYPE.RESULT) {
584 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": other party received offer");
585 if (mJingleStatus == JINGLE_STATUS_OFFERED) {
586 mJingleStatus = JINGLE_STATUS_INITIATED;
587 mXmppConnectionService.markMessage(message, Message.STATUS_OFFERED);
588 } else {
589 Log.d(Config.LOGTAG, "received ack for offer when status was " + mJingleStatus);
590 }
591 } else {
592 fail(IqParser.extractErrorMessage(response));
593 }
594 });
595
596 }
597 }
598
599 private void sendHash() {
600 JinglePacket packet = this.bootstrapPacket("session-info");
601 packet.addChecksum(file.getSha1Sum(), ftVersion.getNamespace());
602 this.sendJinglePacket(packet);
603 }
604
605 private List<Element> getCandidatesAsElements() {
606 List<Element> elements = new ArrayList<>();
607 for (JingleCandidate c : this.candidates) {
608 if (c.isOurs()) {
609 elements.add(c.toElement());
610 }
611 }
612 return elements;
613 }
614
615 private void sendAccept() {
616 mJingleStatus = JINGLE_STATUS_ACCEPTED;
617 this.mStatus = Transferable.STATUS_DOWNLOADING;
618 this.mJingleConnectionManager.updateConversationUi(true);
619 if (initialTransport == Transport.SOCKS) {
620 sendAcceptSocks();
621 } else {
622 sendAcceptIbb();
623 }
624 }
625
626 private void sendAcceptSocks() {
627 gatherAndConnectDirectCandidates();
628 this.mJingleConnectionManager.getPrimaryCandidate(this.account, initiating(), (success, candidate) -> {
629 final JinglePacket packet = bootstrapPacket("session-accept");
630 final Content content = new Content(contentCreator, contentName);
631 content.setFileOffer(fileOffer, ftVersion);
632 content.setTransportId(transportId);
633 if (success && candidate != null && !equalCandidateExists(candidate)) {
634 final JingleSocks5Transport socksConnection = new JingleSocks5Transport(this, candidate);
635 connections.put(candidate.getCid(), socksConnection);
636 socksConnection.connect(new OnTransportConnected() {
637
638 @Override
639 public void failed() {
640 Log.d(Config.LOGTAG, "connection to our own proxy65 candidate failed");
641 content.socks5transport().setChildren(getCandidatesAsElements());
642 packet.setContent(content);
643 sendJinglePacket(packet);
644 connectNextCandidate();
645 }
646
647 @Override
648 public void established() {
649 Log.d(Config.LOGTAG, "connected to proxy65 candidate");
650 mergeCandidate(candidate);
651 content.socks5transport().setChildren(getCandidatesAsElements());
652 packet.setContent(content);
653 sendJinglePacket(packet);
654 connectNextCandidate();
655 }
656 });
657 } else {
658 Log.d(Config.LOGTAG, "did not find a proxy65 candidate for ourselves");
659 content.socks5transport().setChildren(getCandidatesAsElements());
660 packet.setContent(content);
661 sendJinglePacket(packet);
662 connectNextCandidate();
663 }
664 });
665 }
666
667 private void sendAcceptIbb() {
668 this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
669 final JinglePacket packet = bootstrapPacket("session-accept");
670 final Content content = new Content(contentCreator, contentName);
671 content.setFileOffer(fileOffer, ftVersion);
672 content.setTransportId(transportId);
673 content.ibbTransport().setAttribute("block-size", this.ibbBlockSize);
674 packet.setContent(content);
675 this.transport.receive(file, onFileTransmissionStatusChanged);
676 this.sendJinglePacket(packet);
677 }
678
679 private JinglePacket bootstrapPacket(String action) {
680 JinglePacket packet = new JinglePacket();
681 packet.setAction(action);
682 packet.setFrom(account.getJid());
683 packet.setTo(this.message.getCounterpart());
684 packet.setSessionId(this.sessionId);
685 packet.setInitiator(this.initiator);
686 return packet;
687 }
688
689 private void sendJinglePacket(JinglePacket packet) {
690 mXmppConnectionService.sendIqPacket(account, packet, responseListener);
691 }
692
693 private void sendJinglePacket(JinglePacket packet, OnIqPacketReceived callback) {
694 mXmppConnectionService.sendIqPacket(account, packet, callback);
695 }
696
697 private void receiveAccept(JinglePacket packet) {
698 if (this.mJingleStatus != JINGLE_STATUS_INITIATED) {
699 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received out of order session-accept");
700 respondToIqWithOutOfOrder(packet);
701 return;
702 }
703 this.mJingleStatus = JINGLE_STATUS_ACCEPTED;
704 mXmppConnectionService.markMessage(message, Message.STATUS_UNSEND);
705 Content content = packet.getJingleContent();
706 if (content.hasSocks5Transport()) {
707 respondToIq(packet, true);
708 mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
709 this.connectNextCandidate();
710 } else if (content.hasIbbTransport()) {
711 String receivedBlockSize = packet.getJingleContent().ibbTransport().getAttribute("block-size");
712 if (receivedBlockSize != null) {
713 try {
714 int bs = Integer.parseInt(receivedBlockSize);
715 if (bs > this.ibbBlockSize) {
716 this.ibbBlockSize = bs;
717 }
718 } catch (Exception e) {
719 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to parse block size in session-accept");
720 }
721 }
722 respondToIq(packet, true);
723 this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
724 this.transport.connect(onIbbTransportConnected);
725 } else {
726 respondToIq(packet, false);
727 }
728 }
729
730 private void receiveTransportInfo(JinglePacket packet) {
731 final Content content = packet.getJingleContent();
732 if (content.hasSocks5Transport()) {
733 if (content.socks5transport().hasChild("activated")) {
734 respondToIq(packet, true);
735 if ((this.transport != null) && (this.transport instanceof JingleSocks5Transport)) {
736 onProxyActivated.success();
737 } else {
738 String cid = content.socks5transport().findChild("activated").getAttribute("cid");
739 Log.d(Config.LOGTAG, "received proxy activated (" + cid
740 + ")prior to choosing our own transport");
741 JingleSocks5Transport connection = this.connections.get(cid);
742 if (connection != null) {
743 connection.setActivated(true);
744 } else {
745 Log.d(Config.LOGTAG, "activated connection not found");
746 sendSessionTerminate("failed-transport");
747 this.fail();
748 }
749 }
750 } else if (content.socks5transport().hasChild("proxy-error")) {
751 respondToIq(packet, true);
752 onProxyActivated.failed();
753 } else if (content.socks5transport().hasChild("candidate-error")) {
754 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received candidate error");
755 respondToIq(packet, true);
756 this.receivedCandidate = true;
757 if (mJingleStatus == JINGLE_STATUS_ACCEPTED && this.sentCandidate) {
758 this.connect();
759 }
760 } else if (content.socks5transport().hasChild("candidate-used")) {
761 String cid = content.socks5transport().findChild("candidate-used").getAttribute("cid");
762 if (cid != null) {
763 Log.d(Config.LOGTAG, "candidate used by counterpart:" + cid);
764 JingleCandidate candidate = getCandidate(cid);
765 if (candidate == null) {
766 Log.d(Config.LOGTAG, "could not find candidate with cid=" + cid);
767 respondToIq(packet, false);
768 return;
769 }
770 respondToIq(packet, true);
771 candidate.flagAsUsedByCounterpart();
772 this.receivedCandidate = true;
773 if (mJingleStatus == JINGLE_STATUS_ACCEPTED && this.sentCandidate) {
774 this.connect();
775 } else {
776 Log.d(Config.LOGTAG, "ignoring because file is already in transmission or we haven't sent our candidate yet status=" + mJingleStatus + " sentCandidate=" + sentCandidate);
777 }
778 } else {
779 respondToIq(packet, false);
780 }
781 } else {
782 respondToIq(packet, false);
783 }
784 } else {
785 respondToIq(packet, true);
786 }
787 }
788
789 private void connect() {
790 final JingleSocks5Transport connection = chooseConnection();
791 this.transport = connection;
792 if (connection == null) {
793 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not find suitable candidate");
794 this.disconnectSocks5Connections();
795 if (initiating()) {
796 this.sendFallbackToIbb();
797 }
798 } else {
799 final JingleCandidate candidate = connection.getCandidate();
800 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": elected candidate " + candidate.getHost() + ":" + candidate.getPort());
801 this.mJingleStatus = JINGLE_STATUS_TRANSMITTING;
802 if (connection.needsActivation()) {
803 if (connection.getCandidate().isOurs()) {
804 final String sid;
805 if (ftVersion == Content.Version.FT_3) {
806 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": use session ID instead of transport ID to activate proxy");
807 sid = getSessionId();
808 } else {
809 sid = getTransportId();
810 }
811 Log.d(Config.LOGTAG, "candidate "
812 + connection.getCandidate().getCid()
813 + " was our proxy. going to activate");
814 IqPacket activation = new IqPacket(IqPacket.TYPE.SET);
815 activation.setTo(connection.getCandidate().getJid());
816 activation.query("http://jabber.org/protocol/bytestreams")
817 .setAttribute("sid", sid);
818 activation.query().addChild("activate")
819 .setContent(this.getCounterPart().toString());
820 mXmppConnectionService.sendIqPacket(account, activation, (account, response) -> {
821 if (response.getType() != IqPacket.TYPE.RESULT) {
822 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": " + response.toString());
823 sendProxyError();
824 onProxyActivated.failed();
825 } else {
826 sendProxyActivated(connection.getCandidate().getCid());
827 onProxyActivated.success();
828 }
829 });
830 } else {
831 Log.d(Config.LOGTAG,
832 "candidate "
833 + connection.getCandidate().getCid()
834 + " was a proxy. waiting for other party to activate");
835 }
836 } else {
837 if (initiating()) {
838 Log.d(Config.LOGTAG, "we were initiating. sending file");
839 connection.send(file, onFileTransmissionStatusChanged);
840 } else {
841 Log.d(Config.LOGTAG, "we were responding. receiving file");
842 connection.receive(file, onFileTransmissionStatusChanged);
843 }
844 }
845 }
846 }
847
848 private JingleSocks5Transport chooseConnection() {
849 JingleSocks5Transport connection = null;
850 for (Entry<String, JingleSocks5Transport> cursor : connections
851 .entrySet()) {
852 JingleSocks5Transport currentConnection = cursor.getValue();
853 // Log.d(Config.LOGTAG,"comparing candidate: "+currentConnection.getCandidate().toString());
854 if (currentConnection.isEstablished()
855 && (currentConnection.getCandidate().isUsedByCounterpart() || (!currentConnection
856 .getCandidate().isOurs()))) {
857 // Log.d(Config.LOGTAG,"is usable");
858 if (connection == null) {
859 connection = currentConnection;
860 } else {
861 if (connection.getCandidate().getPriority() < currentConnection
862 .getCandidate().getPriority()) {
863 connection = currentConnection;
864 } else if (connection.getCandidate().getPriority() == currentConnection
865 .getCandidate().getPriority()) {
866 // Log.d(Config.LOGTAG,"found two candidates with same priority");
867 if (initiating()) {
868 if (currentConnection.getCandidate().isOurs()) {
869 connection = currentConnection;
870 }
871 } else {
872 if (!currentConnection.getCandidate().isOurs()) {
873 connection = currentConnection;
874 }
875 }
876 }
877 }
878 }
879 }
880 return connection;
881 }
882
883 private void sendSuccess() {
884 sendSessionTerminate("success");
885 this.disconnectSocks5Connections();
886 this.mJingleStatus = JINGLE_STATUS_FINISHED;
887 this.message.setStatus(Message.STATUS_RECEIVED);
888 this.message.setTransferable(null);
889 this.mXmppConnectionService.updateMessage(message, false);
890 this.mJingleConnectionManager.finishConnection(this);
891 }
892
893 private void sendFallbackToIbb() {
894 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending fallback to ibb");
895 JinglePacket packet = this.bootstrapPacket("transport-replace");
896 Content content = new Content(this.contentCreator, this.contentName);
897 this.transportId = this.mJingleConnectionManager.nextRandomId();
898 content.setTransportId(this.transportId);
899 content.ibbTransport().setAttribute("block-size",
900 Integer.toString(this.ibbBlockSize));
901 packet.setContent(content);
902 this.sendJinglePacket(packet);
903 }
904
905
906 private void receiveFallbackToIbb(JinglePacket packet) {
907 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": receiving fallback to ibb");
908 final String receivedBlockSize = packet.getJingleContent().ibbTransport().getAttribute("block-size");
909 if (receivedBlockSize != null) {
910 try {
911 final int bs = Integer.parseInt(receivedBlockSize);
912 if (bs < this.ibbBlockSize) {
913 this.ibbBlockSize = bs;
914 }
915 } catch (NumberFormatException e) {
916 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to parse block size in transport-replace");
917 }
918 }
919 this.transportId = packet.getJingleContent().getTransportId();
920 this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
921
922 final JinglePacket answer = bootstrapPacket("transport-accept");
923
924 final Content content = new Content(contentCreator, contentName);
925 content.ibbTransport().setAttribute("block-size", this.ibbBlockSize);
926 content.ibbTransport().setAttribute("sid", this.transportId);
927 answer.setContent(content);
928
929 respondToIq(packet, true);
930
931 if (initiating()) {
932 this.sendJinglePacket(answer, (account, response) -> {
933 if (response.getType() == IqPacket.TYPE.RESULT) {
934 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " recipient ACKed our transport-accept. creating ibb");
935 transport.connect(onIbbTransportConnected);
936 }
937 });
938 } else {
939 this.transport.receive(file, onFileTransmissionStatusChanged);
940 this.sendJinglePacket(answer);
941 }
942 }
943
944 private void receiveTransportAccept(JinglePacket packet) {
945 if (packet.getJingleContent().hasIbbTransport()) {
946 final Element ibbTransport = packet.getJingleContent().ibbTransport();
947 final String receivedBlockSize = ibbTransport.getAttribute("block-size");
948 final String sid = ibbTransport.getAttribute("sid");
949 if (receivedBlockSize != null) {
950 try {
951 int bs = Integer.parseInt(receivedBlockSize);
952 if (bs < this.ibbBlockSize) {
953 this.ibbBlockSize = bs;
954 }
955 } catch (NumberFormatException e) {
956 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to parse block size in transport-accept");
957 }
958 }
959 this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
960
961 if (sid == null || !sid.equals(this.transportId)) {
962 Log.w(Config.LOGTAG, String.format("%s: sid in transport-accept (%s) did not match our sid (%s) ", account.getJid().asBareJid(), sid, transportId));
963 }
964 respondToIq(packet, true);
965 //might be receive instead if we are not initiating
966 if (initiating()) {
967 this.transport.connect(onIbbTransportConnected);
968 } else {
969 this.transport.receive(file, onFileTransmissionStatusChanged);
970 }
971 } else {
972 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received invalid transport-accept");
973 respondToIq(packet, false);
974 }
975 }
976
977 private void receiveSuccess() {
978 if (initiating()) {
979 this.mJingleStatus = JINGLE_STATUS_FINISHED;
980 this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND_RECEIVED);
981 this.disconnectSocks5Connections();
982 if (this.transport instanceof JingleInbandTransport) {
983 this.transport.disconnect();
984 }
985 this.message.setTransferable(null);
986 this.mJingleConnectionManager.finishConnection(this);
987 } else {
988 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received session-terminate/success while responding");
989 }
990 }
991
992 @Override
993 public void cancel() {
994 this.cancelled = true;
995 abort("cancel");
996 }
997
998 void abort(final String reason) {
999 this.disconnectSocks5Connections();
1000 if (this.transport instanceof JingleInbandTransport) {
1001 this.transport.disconnect();
1002 }
1003 sendSessionTerminate(reason);
1004 this.mJingleConnectionManager.finishConnection(this);
1005 if (responding()) {
1006 this.message.setTransferable(new TransferablePlaceholder(cancelled ? Transferable.STATUS_CANCELLED : Transferable.STATUS_FAILED));
1007 if (this.file != null) {
1008 file.delete();
1009 }
1010 this.mJingleConnectionManager.updateConversationUi(true);
1011 } else {
1012 this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND_FAILED, cancelled ? Message.ERROR_MESSAGE_CANCELLED : null);
1013 this.message.setTransferable(null);
1014 }
1015 }
1016
1017 private void fail() {
1018 fail(null);
1019 }
1020
1021 private void fail(String errorMessage) {
1022 this.mJingleStatus = JINGLE_STATUS_FAILED;
1023 this.disconnectSocks5Connections();
1024 if (this.transport instanceof JingleInbandTransport) {
1025 this.transport.disconnect();
1026 }
1027 FileBackend.close(mFileInputStream);
1028 FileBackend.close(mFileOutputStream);
1029 if (this.message != null) {
1030 if (responding()) {
1031 this.message.setTransferable(new TransferablePlaceholder(cancelled ? Transferable.STATUS_CANCELLED : Transferable.STATUS_FAILED));
1032 if (this.file != null) {
1033 file.delete();
1034 }
1035 this.mJingleConnectionManager.updateConversationUi(true);
1036 } else {
1037 this.mXmppConnectionService.markMessage(this.message,
1038 Message.STATUS_SEND_FAILED,
1039 cancelled ? Message.ERROR_MESSAGE_CANCELLED : errorMessage);
1040 this.message.setTransferable(null);
1041 }
1042 }
1043 this.mJingleConnectionManager.finishConnection(this);
1044 }
1045
1046 private void sendSessionTerminate(String reason) {
1047 final JinglePacket packet = bootstrapPacket("session-terminate");
1048 final Reason r = new Reason();
1049 r.addChild(reason);
1050 packet.setReason(r);
1051 this.sendJinglePacket(packet);
1052 }
1053
1054 private void connectNextCandidate() {
1055 for (JingleCandidate candidate : this.candidates) {
1056 if ((!connections.containsKey(candidate.getCid()) && (!candidate
1057 .isOurs()))) {
1058 this.connectWithCandidate(candidate);
1059 return;
1060 }
1061 }
1062 this.sendCandidateError();
1063 }
1064
1065 private void connectWithCandidate(final JingleCandidate candidate) {
1066 final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
1067 this, candidate);
1068 connections.put(candidate.getCid(), socksConnection);
1069 socksConnection.connect(new OnTransportConnected() {
1070
1071 @Override
1072 public void failed() {
1073 Log.d(Config.LOGTAG,
1074 "connection failed with " + candidate.getHost() + ":"
1075 + candidate.getPort());
1076 connectNextCandidate();
1077 }
1078
1079 @Override
1080 public void established() {
1081 Log.d(Config.LOGTAG,
1082 "established connection with " + candidate.getHost()
1083 + ":" + candidate.getPort());
1084 sendCandidateUsed(candidate.getCid());
1085 }
1086 });
1087 }
1088
1089 private void disconnectSocks5Connections() {
1090 Iterator<Entry<String, JingleSocks5Transport>> it = this.connections
1091 .entrySet().iterator();
1092 while (it.hasNext()) {
1093 Entry<String, JingleSocks5Transport> pairs = it.next();
1094 pairs.getValue().disconnect();
1095 it.remove();
1096 }
1097 }
1098
1099 private void sendProxyActivated(String cid) {
1100 final JinglePacket packet = bootstrapPacket("transport-info");
1101 final Content content = new Content(this.contentCreator, this.contentName);
1102 content.setTransportId(this.transportId);
1103 content.socks5transport().addChild("activated").setAttribute("cid", cid);
1104 packet.setContent(content);
1105 this.sendJinglePacket(packet);
1106 }
1107
1108 private void sendProxyError() {
1109 final JinglePacket packet = bootstrapPacket("transport-info");
1110 final Content content = new Content(this.contentCreator, this.contentName);
1111 content.setTransportId(this.transportId);
1112 content.socks5transport().addChild("proxy-error");
1113 packet.setContent(content);
1114 this.sendJinglePacket(packet);
1115 }
1116
1117 private void sendCandidateUsed(final String cid) {
1118 JinglePacket packet = bootstrapPacket("transport-info");
1119 Content content = new Content(this.contentCreator, this.contentName);
1120 content.setTransportId(this.transportId);
1121 content.socks5transport().addChild("candidate-used").setAttribute("cid", cid);
1122 packet.setContent(content);
1123 this.sentCandidate = true;
1124 if ((receivedCandidate) && (mJingleStatus == JINGLE_STATUS_ACCEPTED)) {
1125 connect();
1126 }
1127 this.sendJinglePacket(packet);
1128 }
1129
1130 private void sendCandidateError() {
1131 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending candidate error");
1132 JinglePacket packet = bootstrapPacket("transport-info");
1133 Content content = new Content(this.contentCreator, this.contentName);
1134 content.setTransportId(this.transportId);
1135 content.socks5transport().addChild("candidate-error");
1136 packet.setContent(content);
1137 this.sentCandidate = true;
1138 this.sendJinglePacket(packet);
1139 if (receivedCandidate && mJingleStatus == JINGLE_STATUS_ACCEPTED) {
1140 connect();
1141 }
1142 }
1143
1144 public int getJingleStatus() {
1145 return this.mJingleStatus;
1146 }
1147
1148 private boolean equalCandidateExists(JingleCandidate candidate) {
1149 for (JingleCandidate c : this.candidates) {
1150 if (c.equalValues(candidate)) {
1151 return true;
1152 }
1153 }
1154 return false;
1155 }
1156
1157 private void mergeCandidate(JingleCandidate candidate) {
1158 for (JingleCandidate c : this.candidates) {
1159 if (c.equals(candidate)) {
1160 return;
1161 }
1162 }
1163 this.candidates.add(candidate);
1164 }
1165
1166 private void mergeCandidates(List<JingleCandidate> candidates) {
1167 Collections.sort(candidates, (a, b) -> Integer.compare(b.getPriority(), a.getPriority()));
1168 for (JingleCandidate c : candidates) {
1169 mergeCandidate(c);
1170 }
1171 }
1172
1173 private JingleCandidate getCandidate(String cid) {
1174 for (JingleCandidate c : this.candidates) {
1175 if (c.getCid().equals(cid)) {
1176 return c;
1177 }
1178 }
1179 return null;
1180 }
1181
1182 void updateProgress(int i) {
1183 this.mProgress = i;
1184 mJingleConnectionManager.updateConversationUi(false);
1185 }
1186
1187 public String getTransportId() {
1188 return this.transportId;
1189 }
1190
1191 public Content.Version getFtVersion() {
1192 return this.ftVersion;
1193 }
1194
1195 public boolean hasTransportId(String sid) {
1196 return sid.equals(this.transportId);
1197 }
1198
1199 public JingleTransport getTransport() {
1200 return this.transport;
1201 }
1202
1203 public boolean start() {
1204 if (account.getStatus() == Account.State.ONLINE) {
1205 if (mJingleStatus == JINGLE_STATUS_INITIATED) {
1206 new Thread(this::sendAccept).start();
1207 }
1208 return true;
1209 } else {
1210 return false;
1211 }
1212 }
1213
1214 @Override
1215 public int getStatus() {
1216 return this.mStatus;
1217 }
1218
1219 @Override
1220 public long getFileSize() {
1221 if (this.file != null) {
1222 return this.file.getExpectedSize();
1223 } else {
1224 return 0;
1225 }
1226 }
1227
1228 @Override
1229 public int getProgress() {
1230 return this.mProgress;
1231 }
1232
1233 public AbstractConnectionManager getConnectionManager() {
1234 return this.mJingleConnectionManager;
1235 }
1236
1237 interface OnProxyActivated {
1238 void success();
1239
1240 void failed();
1241 }
1242}