309 lines
12 KiB
Java
309 lines
12 KiB
Java
/**
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*
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* Copyright 2017 Paul Schaub
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.jingle.transport.jingle_s5b;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.List;
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import java.util.WeakHashMap;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import org.jivesoftware.smack.ConnectionListener;
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import org.jivesoftware.smack.Manager;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.util.StringUtils;
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import org.jivesoftware.smackx.bytestreams.socks5.Socks5BytestreamManager;
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import org.jivesoftware.smackx.bytestreams.socks5.Socks5Proxy;
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import org.jivesoftware.smackx.bytestreams.socks5.packet.Bytestream;
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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import org.jivesoftware.smackx.jingle.JingleManager;
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import org.jivesoftware.smackx.jingle.JingleTransportManager;
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import org.jivesoftware.smackx.jingle.component.JingleContent;
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import org.jivesoftware.smackx.jingle.component.JingleSession;
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import org.jivesoftware.smackx.jingle.component.JingleTransport;
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import org.jivesoftware.smackx.jingle.component.JingleTransportCandidate;
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import org.jivesoftware.smackx.jingle.element.JingleAction;
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import org.jivesoftware.smackx.jingle.element.JingleContentElement;
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import org.jivesoftware.smackx.jingle.element.JingleContentTransportElement;
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import org.jivesoftware.smackx.jingle.element.JingleElement;
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import org.jivesoftware.smackx.jingle.transport.jingle_s5b.element.JingleS5BTransportCandidateElement;
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import org.jivesoftware.smackx.jingle.transport.jingle_s5b.element.JingleS5BTransportElement;
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import org.jivesoftware.smackx.jingle.transport.jingle_s5b.element.JingleS5BTransportInfoElement;
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import org.jivesoftware.smackx.jingle.transport.jingle_s5b.provider.JingleS5BTransportProvider;
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import org.jxmpp.jid.Jid;
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/**
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* Manager for Jingle SOCKS5 Bytestream transports (XEP-0261).
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*/
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public final class JingleS5BTransportManager extends Manager implements JingleTransportManager {
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private static final Logger LOGGER = Logger.getLogger(JingleS5BTransportManager.class.getName());
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private final Socks5BytestreamManager socks5BytestreamManager = Socks5BytestreamManager.getBytestreamManager(connection());
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private static final WeakHashMap<XMPPConnection, JingleS5BTransportManager> INSTANCES = new WeakHashMap<>();
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private List<Bytestream.StreamHost> localStreamHosts = null;
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private List<Bytestream.StreamHost> availableStreamHosts = null;
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public static boolean useLocalCandidates = true;
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public static boolean useExternalCandidates = true;
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static {
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JingleManager.addJingleTransportAdapter(new JingleS5BTransportAdapter());
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JingleManager.addJingleTransportProvider(new JingleS5BTransportProvider());
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}
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private JingleS5BTransportManager(XMPPConnection connection) {
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super(connection);
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ServiceDiscoveryManager.getInstanceFor(connection).addFeature(getNamespace());
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JingleManager jingleManager = JingleManager.getInstanceFor(connection);
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jingleManager.addJingleTransportManager(this);
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connection.addConnectionListener(connectionListener);
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}
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public static JingleS5BTransportManager getInstanceFor(XMPPConnection connection) {
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JingleS5BTransportManager manager = INSTANCES.get(connection);
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if (manager == null) {
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manager = new JingleS5BTransportManager(connection);
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INSTANCES.put(connection, manager);
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}
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return manager;
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}
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@Override
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public String getNamespace() {
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return JingleS5BTransport.NAMESPACE;
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}
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@Override
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public JingleTransport<?> createTransportForInitiator(JingleContent content) {
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JingleSession session = content.getParent();
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String sid = StringUtils.randomString(24);
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List<JingleTransportCandidate<?>> candidates = collectCandidates();
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return new JingleS5BTransport(session.getInitiator(), session.getResponder(), sid, Bytestream.Mode.tcp, candidates);
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}
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@Override
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public JingleTransport<?> createTransportForResponder(JingleContent content, JingleTransport<?> peersTransport) {
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JingleSession session = content.getParent();
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return new JingleS5BTransport(session.getInitiator(), session.getResponder(), collectCandidates(), (JingleS5BTransport) peersTransport);
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}
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@Override
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public JingleTransport<?> createTransportForResponder(JingleContent content, JingleContentTransportElement peersTransportElement) {
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JingleS5BTransport other = new JingleS5BTransportAdapter().transportFromElement(peersTransportElement);
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return createTransportForResponder(content, other);
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}
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@Override
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public int getPriority() {
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return 10000; // SOCKS5 has a high priority
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}
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List<JingleTransportCandidate<?>> collectCandidates() {
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List<JingleTransportCandidate<?>> candidates = new ArrayList<>();
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//Local host
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if (JingleS5BTransportManager.isUseLocalCandidates()) {
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for (Bytestream.StreamHost host : getLocalStreamHosts()) {
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candidates.add(new JingleS5BTransportCandidate(StringUtils.randomString(16), host, 100, JingleS5BTransportCandidateElement.Type.proxy));
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}
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}
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List<Bytestream.StreamHost> remoteHosts = Collections.emptyList();
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if (JingleS5BTransportManager.isUseExternalCandidates()) {
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try {
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remoteHosts = getServersStreamHosts();
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} catch (InterruptedException | XMPPException.XMPPErrorException | SmackException.NotConnectedException | SmackException.NoResponseException e) {
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LOGGER.log(Level.WARNING, "Could not determine available StreamHosts.", e);
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}
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}
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for (Bytestream.StreamHost host : remoteHosts) {
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candidates.add(new JingleS5BTransportCandidate(StringUtils.randomString(16), host, 0, JingleS5BTransportCandidateElement.Type.proxy));
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}
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return candidates;
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}
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private List<Bytestream.StreamHost> queryServersStreamHosts() throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException, SmackException.NoResponseException {
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List<Jid> proxies = socks5BytestreamManager.determineProxies();
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return determineStreamHostInfo(proxies);
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}
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private List<Bytestream.StreamHost> queryLocalStreamHosts() {
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return socks5BytestreamManager.getLocalStreamHost();
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}
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private List<Bytestream.StreamHost> getServersStreamHosts() throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException, SmackException.NoResponseException {
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if (availableStreamHosts == null) {
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availableStreamHosts = queryServersStreamHosts();
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}
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return availableStreamHosts;
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}
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private List<Bytestream.StreamHost> getLocalStreamHosts() {
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if (localStreamHosts == null) {
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localStreamHosts = queryLocalStreamHosts();
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}
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return localStreamHosts;
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}
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private List<Bytestream.StreamHost> determineStreamHostInfo(List<Jid> proxies) {
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List<Bytestream.StreamHost> streamHosts = new ArrayList<>();
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Iterator<Jid> iterator = proxies.iterator();
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while (iterator.hasNext()) {
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Jid proxy = iterator.next();
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Bytestream request = new Bytestream();
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request.setType(IQ.Type.get);
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request.setTo(proxy);
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try {
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Bytestream response = connection().createStanzaCollectorAndSend(request).nextResultOrThrow();
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streamHosts.addAll(response.getStreamHosts());
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}
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catch (Exception e) {
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iterator.remove();
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}
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}
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return streamHosts;
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}
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private static JingleElement createTransportInfo(JingleS5BTransport transport, JingleS5BTransportInfoElement info) {
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JingleContent content = transport.getParent();
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JingleSession session = content.getParent();
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JingleElement.Builder jb = JingleElement.getBuilder()
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.setSessionId(session.getSessionId())
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.setAction(JingleAction.transport_info);
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if (session.isInitiator()) {
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jb.setInitiator(session.getInitiator());
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} else {
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jb.setResponder(session.getResponder());
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}
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JingleContentElement.Builder cb = JingleContentElement.getBuilder()
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.setCreator(content.getCreator())
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.setName(content.getName())
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.setSenders(content.getSenders());
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JingleS5BTransportElement.Builder tb = JingleS5BTransportElement.getBuilder()
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.setTransportInfo(info)
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.setStreamId(transport.getStreamId());
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JingleElement jingle = jb.addJingleContent(cb.setTransport(tb.build()).build()).build();
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jingle.setFrom(session.getOurJid());
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jingle.setTo(session.getPeer());
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return jingle;
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}
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static JingleElement createCandidateUsed(JingleS5BTransport transport, JingleS5BTransportCandidate candidate) {
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return createTransportInfo(transport, new JingleS5BTransportInfoElement.CandidateUsed(candidate.getCandidateId()));
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}
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static JingleElement createCandidateError(JingleS5BTransport transport) {
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return createTransportInfo(transport, JingleS5BTransportInfoElement.CandidateError.INSTANCE);
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}
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static JingleElement createProxyError(JingleS5BTransport transport) {
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return createTransportInfo(transport, JingleS5BTransportInfoElement.ProxyError.INSTANCE);
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}
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static JingleElement createCandidateActivated(JingleS5BTransport transport, JingleS5BTransportCandidate candidate) {
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return createTransportInfo(transport, new JingleS5BTransportInfoElement.CandidateActivated(candidate.getCandidateId()));
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}
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public static void setUseLocalCandidates(boolean localCandidates) {
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JingleS5BTransportManager.useLocalCandidates = localCandidates;
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}
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public static void setUseExternalCandidates(boolean externalCandidates) {
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JingleS5BTransportManager.useExternalCandidates = externalCandidates;
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}
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public static boolean isUseLocalCandidates() {
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return useLocalCandidates;
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}
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public static boolean isUseExternalCandidates() {
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return useExternalCandidates;
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}
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@Override
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public int compareTo(JingleTransportManager other) {
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return getPriority() > other.getPriority() ? 1 : -1;
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}
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private final ConnectionListener connectionListener = new ConnectionListener() {
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@Override
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public void connected(XMPPConnection connection) {
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}
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@Override
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public void authenticated(XMPPConnection connection, boolean resumed) {
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if (connection.equals(connection())) {
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try {
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Socks5Proxy socks5Proxy = Socks5Proxy.getSocks5Proxy();
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if (!socks5Proxy.isRunning()) {
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socks5Proxy.start();
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}
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localStreamHosts = queryLocalStreamHosts();
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availableStreamHosts = queryServersStreamHosts();
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} catch (InterruptedException | SmackException.NoResponseException | SmackException.NotConnectedException | XMPPException.XMPPErrorException e) {
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LOGGER.log(Level.WARNING, "Could not query available StreamHosts.", e);
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}
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}
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}
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@Override
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public void connectionClosed() {
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Socks5Proxy proxy = Socks5Proxy.getSocks5Proxy();
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if (proxy.isRunning()) {
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Socks5Proxy.getSocks5Proxy().stop();
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}
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}
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@Override
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public void connectionClosedOnError(Exception e) {
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}
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@Override
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public void reconnectionSuccessful() {
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}
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@Override
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public void reconnectingIn(int seconds) {
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}
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@Override
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public void reconnectionFailed(Exception e) {
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}
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};
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}
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