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/*
* Copyright (c) 2011 Tobias Markmann
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
/*
* Copyright (c) 2013-2015 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
/*
* Copyright (c) 2015 Tarun Gupta.
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
package com.isode.stroke.filetransfer;
import java.util.PriorityQueue;
import com.isode.stroke.network.ConnectionFactory;
import com.isode.stroke.network.TimerFactory;
import com.isode.stroke.network.Connection;
import com.isode.stroke.signals.SignalConnection;
import com.isode.stroke.signals.Slot1;
import com.isode.stroke.signals.Signal2;
import com.isode.stroke.elements.JingleS5BTransportPayload;
import java.util.logging.Logger;
import java.util.Vector;
public class RemoteJingleTransportCandidateSelector {
private ConnectionFactory connectionFactory;
private TimerFactory timerFactory;
private PriorityQueue<JingleS5BTransportPayload.Candidate> candidates = new PriorityQueue<JingleS5BTransportPayload.Candidate>(25, new JingleS5BTransportPayload.CompareCandidate());
private SOCKS5BytestreamClientSession s5bSession;
private SignalConnection sessionReadyConnection;
private JingleS5BTransportPayload.Candidate lastCandidate;
private String socks5DstAddr;
private FileTransferOptions options;
private Logger logger_ = Logger.getLogger(this.getClass().getName());
public RemoteJingleTransportCandidateSelector(ConnectionFactory connectionFactory, TimerFactory timerFactory, final FileTransferOptions options) {
this.connectionFactory = connectionFactory;
this.timerFactory = timerFactory;
this.options = options;
}
public void addCandidates(final Vector<JingleS5BTransportPayload.Candidate> candidates) {
for(JingleS5BTransportPayload.Candidate c : candidates) {
this.candidates.add(c);
}
}
public void setSOCKS5DstAddr(final String socks5DstAddr) {
this.socks5DstAddr = socks5DstAddr;
}
public void startSelectingCandidate() {
tryNextCandidate();
}
public void stopSelectingCandidate() {
if (s5bSession != null) {
sessionReadyConnection.disconnect();
s5bSession.stop();
}
}
public Signal2<JingleS5BTransportPayload.Candidate, SOCKS5BytestreamClientSession> onCandidateSelectFinished = new Signal2<JingleS5BTransportPayload.Candidate, SOCKS5BytestreamClientSession>();
private void tryNextCandidate() {
if (candidates.isEmpty()) {
logger_.fine("No more candidates\n");
onCandidateSelectFinished.emit(null, null);
}
else {
lastCandidate = candidates.poll();
logger_.fine("Trying candidate " + lastCandidate.cid + "\n");
if ((lastCandidate.type.equals(JingleS5BTransportPayload.Candidate.Type.DirectType) && options.isDirectAllowed()) ||
(lastCandidate.type.equals(JingleS5BTransportPayload.Candidate.Type.AssistedType) && options.isAssistedAllowed()) ||
(lastCandidate.type.equals(JingleS5BTransportPayload.Candidate.Type.ProxyType) && options.isProxiedAllowed())) {
Connection connection = connectionFactory.createConnection();
s5bSession = new SOCKS5BytestreamClientSession(connection, lastCandidate.hostPort, socks5DstAddr, timerFactory);
sessionReadyConnection = s5bSession.onSessionReady.connect(new Slot1<Boolean>() {
@Override
public void call(Boolean b) {
handleSessionReady(b);
}
});
s5bSession.start();
}
else {
logger_.fine("Can't handle this type of candidate\n");
tryNextCandidate();
}
}
}
private void handleSessionReady(boolean error) {
sessionReadyConnection.disconnect();
if (error) {
s5bSession = null;
tryNextCandidate();
}
else {
onCandidateSelectFinished.emit(lastCandidate, s5bSession);
}
}
}
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Swift