package eu.siacs.conversations.xmpp.jingle; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map.Entry; import android.util.Log; import eu.siacs.conversations.entities.Account; import eu.siacs.conversations.entities.Conversation; import eu.siacs.conversations.entities.Message; import eu.siacs.conversations.services.XmppConnectionService; import eu.siacs.conversations.xml.Element; import eu.siacs.conversations.xmpp.OnIqPacketReceived; import eu.siacs.conversations.xmpp.jingle.stanzas.Content; import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket; import eu.siacs.conversations.xmpp.jingle.stanzas.Reason; import eu.siacs.conversations.xmpp.stanzas.IqPacket; public class JingleConnection { private JingleConnectionManager mJingleConnectionManager; private XmppConnectionService mXmppConnectionService; public static final int STATUS_INITIATED = 0; public static final int STATUS_ACCEPTED = 1; public static final int STATUS_TERMINATED = 2; public static final int STATUS_CANCELED = 3; public static final int STATUS_FINISHED = 4; public static final int STATUS_TRANSMITTING = 5; public static final int STATUS_FAILED = 99; private int status = -1; private Message message; private String sessionId; private Account account; private String initiator; private String responder; private List candidates = new ArrayList(); private HashMap connections = new HashMap(); private String transportId; private Element fileOffer; private JingleFile file = null; private boolean receivedCandidate = false; private boolean sentCandidate = false; private JingleTransport transport = null; private OnIqPacketReceived responseListener = new OnIqPacketReceived() { @Override public void onIqPacketReceived(Account account, IqPacket packet) { if (packet.getType() == IqPacket.TYPE_ERROR) { mXmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED); status = STATUS_FAILED; } } }; final OnFileTransmitted onFileTransmitted = new OnFileTransmitted() { @Override public void onFileTransmitted(JingleFile file) { if (responder.equals(account.getFullJid())) { sendSuccess(); mXmppConnectionService.markMessage(message, Message.STATUS_RECIEVED); } Log.d("xmppService","sucessfully transmitted file. sha1:"+file.getSha1Sum()); } }; private OnProxyActivated onProxyActivated = new OnProxyActivated() { @Override public void success() { if (initiator.equals(account.getFullJid())) { Log.d("xmppService","we were initiating. sending file"); transport.send(file,onFileTransmitted); } else { transport.receive(file,onFileTransmitted); Log.d("xmppService","we were responding. receiving file"); } } @Override public void failed() { Log.d("xmppService","proxy activation failed"); } }; public JingleConnection(JingleConnectionManager mJingleConnectionManager) { this.mJingleConnectionManager = mJingleConnectionManager; this.mXmppConnectionService = mJingleConnectionManager.getXmppConnectionService(); } public String getSessionId() { return this.sessionId; } public String getAccountJid() { return this.account.getFullJid(); } public String getCounterPart() { return this.message.getCounterpart(); } public void deliverPacket(JinglePacket packet) { if (packet.isAction("session-terminate")) { Reason reason = packet.getReason(); if (reason!=null) { if (reason.hasChild("cancel")) { this.cancel(); } else if (reason.hasChild("success")) { this.finish(); } } else { Log.d("xmppService","remote terminated for no reason"); this.cancel(); } } else if (packet.isAction("session-accept")) { accept(packet); } else if (packet.isAction("transport-info")) { transportInfo(packet); } else { Log.d("xmppService","packet arrived in connection. action was "+packet.getAction()); } } public void init(Message message) { this.message = message; this.account = message.getConversation().getAccount(); this.initiator = this.account.getFullJid(); this.responder = this.message.getCounterpart(); this.sessionId = this.mJingleConnectionManager.nextRandomId(); if (this.candidates.size() > 0) { this.sendInitRequest(); } else { this.mJingleConnectionManager.getPrimaryCandidate(account, new OnPrimaryCandidateFound() { @Override public void onPrimaryCandidateFound(boolean success, final JingleCandidate candidate) { if (success) { final SocksConnection socksConnection = new SocksConnection(JingleConnection.this, candidate); connections.put(candidate.getCid(), socksConnection); socksConnection.connect(new OnSocksConnection() { @Override public void failed() { Log.d("xmppService","connection to our own primary candidete failed"); sendInitRequest(); } @Override public void established() { Log.d("xmppService","succesfully connected to our own primary candidate"); mergeCandidate(candidate); sendInitRequest(); } }); mergeCandidate(candidate); } else { Log.d("xmppService","no primary candidate of our own was found"); sendInitRequest(); } } }); } } public void init(Account account, JinglePacket packet) { this.status = STATUS_INITIATED; Conversation conversation = this.mXmppConnectionService.findOrCreateConversation(account, packet.getFrom().split("/")[0], false); this.message = new Message(conversation, "receiving image file", Message.ENCRYPTION_NONE); this.message.setType(Message.TYPE_IMAGE); this.message.setStatus(Message.STATUS_RECIEVING); String[] fromParts = packet.getFrom().split("/"); this.message.setPresence(fromParts[1]); this.account = account; this.initiator = packet.getFrom(); this.responder = this.account.getFullJid(); this.sessionId = packet.getSessionId(); Content content = packet.getJingleContent(); this.transportId = content.getTransportId(); this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren())); this.fileOffer = packet.getJingleContent().getFileOffer(); if (fileOffer!=null) { this.file = this.mXmppConnectionService.getFileBackend().getJingleFile(message); Element fileSize = fileOffer.findChild("size"); Element fileName = fileOffer.findChild("name"); this.file.setExpectedSize(Long.parseLong(fileSize.getContent())); conversation.getMessages().add(message); this.mXmppConnectionService.databaseBackend.createMessage(message); if (this.mXmppConnectionService.convChangedListener!=null) { this.mXmppConnectionService.convChangedListener.onConversationListChanged(); } if (this.file.getExpectedSize()<=this.mJingleConnectionManager.getAutoAcceptFileSize()) { Log.d("xmppService","auto accepting file from "+packet.getFrom()); this.sendAccept(); } else { Log.d("xmppService","not auto accepting new file offer with size: "+this.file.getExpectedSize()+" allowed size:"+this.mJingleConnectionManager.getAutoAcceptFileSize()); } } else { Log.d("xmppService","no file offer was attached. aborting"); } } private void sendInitRequest() { JinglePacket packet = this.bootstrapPacket("session-initiate"); Content content = new Content(); if (message.getType() == Message.TYPE_IMAGE) { content.setAttribute("creator", "initiator"); content.setAttribute("name", "a-file-offer"); content.setTransportId(this.transportId); this.file = this.mXmppConnectionService.getFileBackend().getJingleFile(message); content.setFileOffer(this.file); this.transportId = this.mJingleConnectionManager.nextRandomId(); content.setTransportId(this.transportId); content.socks5transport().setChildren(getCandidatesAsElements()); packet.setContent(content); this.sendJinglePacket(packet); this.status = STATUS_INITIATED; } } private List getCandidatesAsElements() { List elements = new ArrayList(); for(JingleCandidate c : this.candidates) { elements.add(c.toElement()); } return elements; } private void sendAccept() { status = STATUS_ACCEPTED; connectNextCandidate(); this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() { @Override public void onPrimaryCandidateFound(boolean success,final JingleCandidate candidate) { final JinglePacket packet = bootstrapPacket("session-accept"); final Content content = new Content(); content.setFileOffer(fileOffer); content.setTransportId(transportId); if ((success)&&(!equalCandidateExists(candidate))) { final SocksConnection socksConnection = new SocksConnection(JingleConnection.this, candidate); connections.put(candidate.getCid(), socksConnection); socksConnection.connect(new OnSocksConnection() { @Override public void failed() { Log.d("xmppService","connection to our own primary candidate failed"); content.socks5transport().setChildren(getCandidatesAsElements()); packet.setContent(content); sendJinglePacket(packet); } @Override public void established() { Log.d("xmppService","connected to primary candidate"); mergeCandidate(candidate); content.socks5transport().setChildren(getCandidatesAsElements()); packet.setContent(content); sendJinglePacket(packet); } }); } else { Log.d("xmppService","did not find a primary candidate for ourself"); content.socks5transport().setChildren(getCandidatesAsElements()); packet.setContent(content); sendJinglePacket(packet); } } }); } private JinglePacket bootstrapPacket(String action) { JinglePacket packet = new JinglePacket(); packet.setAction(action); packet.setFrom(account.getFullJid()); packet.setTo(this.message.getCounterpart()); packet.setSessionId(this.sessionId); packet.setInitiator(this.initiator); return packet; } private void sendJinglePacket(JinglePacket packet) { //Log.d("xmppService",packet.toString()); account.getXmppConnection().sendIqPacket(packet,responseListener); } private void accept(JinglePacket packet) { Content content = packet.getJingleContent(); mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren())); this.status = STATUS_ACCEPTED; this.connectNextCandidate(); IqPacket response = packet.generateRespone(IqPacket.TYPE_RESULT); account.getXmppConnection().sendIqPacket(response, null); } private void transportInfo(JinglePacket packet) { Content content = packet.getJingleContent(); if (content.hasSocks5Transport()) { if (content.socks5transport().hasChild("activated")) { onProxyActivated.success(); } else if (content.socks5transport().hasChild("activated")) { onProxyActivated.failed(); } else if (content.socks5transport().hasChild("candidate-error")) { Log.d("xmppService","received candidate error"); this.receivedCandidate = true; if (status == STATUS_ACCEPTED) { this.connect(); } } else if (content.socks5transport().hasChild("candidate-used")){ String cid = content.socks5transport().findChild("candidate-used").getAttribute("cid"); if (cid!=null) { Log.d("xmppService","candidate used by counterpart:"+cid); JingleCandidate candidate = getCandidate(cid); candidate.flagAsUsedByCounterpart(); this.receivedCandidate = true; if ((status == STATUS_ACCEPTED)&&(this.sentCandidate)) { this.connect(); } else { Log.d("xmppService","ignoring because file is already in transmission or we havent sent our candidate yet"); } } else { Log.d("xmppService","couldn't read used candidate"); } } else { Log.d("xmppService","empty transport"); } } IqPacket response = packet.generateRespone(IqPacket.TYPE_RESULT); account.getXmppConnection().sendIqPacket(response, null); } private void connect() { final SocksConnection connection = chooseConnection(); this.transport = connection; if (connection==null) { Log.d("xmppService","could not find suitable candidate"); this.disconnect(); this.status = STATUS_FAILED; this.mXmppConnectionService.markMessage(this.message, Message.STATUS_SEND_FAILED); } else { this.status = STATUS_TRANSMITTING; if (connection.isProxy()) { if (connection.getCandidate().isOurs()) { Log.d("xmppService","candidate "+connection.getCandidate().getCid()+" was our proxy and needs activation"); IqPacket activation = new IqPacket(IqPacket.TYPE_SET); activation.setTo(connection.getCandidate().getJid()); activation.query("http://jabber.org/protocol/bytestreams").setAttribute("sid", this.getSessionId()); activation.query().addChild("activate").setContent(this.getCounterPart()); this.account.getXmppConnection().sendIqPacket(activation, new OnIqPacketReceived() { @Override public void onIqPacketReceived(Account account, IqPacket packet) { if (packet.getType()==IqPacket.TYPE_ERROR) { onProxyActivated.failed(); } else { onProxyActivated.success(); sendProxyActivated(connection.getCandidate().getCid()); } } }); } } else { if (initiator.equals(account.getFullJid())) { Log.d("xmppService","we were initiating. sending file"); connection.send(file,onFileTransmitted); } else { Log.d("xmppService","we were responding. receiving file"); connection.receive(file,onFileTransmitted); } } } } private SocksConnection chooseConnection() { SocksConnection connection = null; Iterator> it = this.connections.entrySet().iterator(); while (it.hasNext()) { Entry pairs = it.next(); SocksConnection currentConnection = pairs.getValue(); //Log.d("xmppService","comparing candidate: "+currentConnection.getCandidate().toString()); if (currentConnection.isEstablished()&&(currentConnection.getCandidate().isUsedByCounterpart()||(!currentConnection.getCandidate().isOurs()))) { //Log.d("xmppService","is usable"); if (connection==null) { connection = currentConnection; } else { if (connection.getCandidate().getPriority()> it = this.connections.entrySet().iterator(); while (it.hasNext()) { Entry pairs = it.next(); pairs.getValue().disconnect(); it.remove(); } } private void sendProxyActivated(String cid) { JinglePacket packet = bootstrapPacket("transport-info"); Content content = new Content(); //TODO: put these into actual variables content.setAttribute("creator", "initiator"); content.setAttribute("name", "a-file-offer"); content.setTransportId(this.transportId); content.socks5transport().addChild("activated").setAttribute("cid", cid); packet.setContent(content); this.sendJinglePacket(packet); } private void sendCandidateUsed(final String cid) { JinglePacket packet = bootstrapPacket("transport-info"); Content content = new Content(); //TODO: put these into actual variables content.setAttribute("creator", "initiator"); content.setAttribute("name", "a-file-offer"); content.setTransportId(this.transportId); content.setUsedCandidate(cid); packet.setContent(content); this.sendJinglePacket(packet); this.sentCandidate = true; if ((receivedCandidate)&&(status == STATUS_ACCEPTED)) { connect(); } } private void sendCandidateError() { JinglePacket packet = bootstrapPacket("transport-info"); Content content = new Content(); //TODO: put these into actual variables content.setAttribute("creator", "initiator"); content.setAttribute("name", "a-file-offer"); content.setTransportId(this.transportId); content.setCandidateError(); packet.setContent(content); this.sendJinglePacket(packet); this.sentCandidate = true; if ((receivedCandidate)&&(status == STATUS_ACCEPTED)) { connect(); } } public String getInitiator() { return this.initiator; } public String getResponder() { return this.responder; } public int getStatus() { return this.status; } private boolean equalCandidateExists(JingleCandidate candidate) { for(JingleCandidate c : this.candidates) { if (c.equalValues(candidate)) { return true; } } return false; } private void mergeCandidate(JingleCandidate candidate) { for(JingleCandidate c : this.candidates) { if (c.equals(candidate)) { return; } } this.candidates.add(candidate); } private void mergeCandidates(List candidates) { for(JingleCandidate c : candidates) { mergeCandidate(c); } } private JingleCandidate getCandidate(String cid) { for(JingleCandidate c : this.candidates) { if (c.getCid().equals(cid)) { return c; } } return null; } interface OnProxyActivated { public void success(); public void failed(); } }