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