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