288 lines
12 KiB
Java
288 lines
12 KiB
Java
/**
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*
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* Copyright 2003-2005 Jive Software.
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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.jingleold.nat;
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import java.net.InetAddress;
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import java.net.NetworkInterface;
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import java.net.SocketException;
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import java.net.UnknownHostException;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Random;
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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.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.smackx.jingleold.JingleSession;
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import de.javawi.jstun.test.demo.ice.Candidate;
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import de.javawi.jstun.test.demo.ice.ICENegociator;
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import de.javawi.jstun.util.UtilityException;
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/**
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* ICE Resolver for Jingle transport method that results in sending data between two entities using the Interactive Connectivity Establishment (ICE) methodology. (XEP-0176)
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* The goal of this resolver is to make possible to establish and manage out-of-band connections between two XMPP entities, even if they are behind Network Address Translators (NATs) or firewalls.
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* To use this resolver you must have a STUN Server and be in a non STUN blocked network. Or use an XMPP server with public IP detection Service.
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*
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* @author Thiago Camargo
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*/
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public class ICEResolver extends TransportResolver {
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private static final Logger LOGGER = Logger.getLogger(ICEResolver.class.getName());
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XMPPConnection connection;
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Random random = new Random();
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long sid;
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String server;
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int port;
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static Map<String, ICENegociator> negociatorsMap = new HashMap<String, ICENegociator>();
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// ICENegociator iceNegociator = null;
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public ICEResolver(XMPPConnection connection, String server, int port) {
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super();
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this.connection = connection;
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this.server = server;
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this.port = port;
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this.setType(Type.ice);
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}
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@Override
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public void initialize() throws XMPPException {
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if (!isResolving() && !isResolved()) {
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LOGGER.fine("Initialized");
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// Negotiation with a STUN server for a set of interfaces is quite slow, but the results
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// never change over then instance of a JVM. To increase connection performance considerably
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// we now cache established/initialized negotiators for each STUN server, so that subsequent uses
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// of the STUN server are much, much faster.
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if (negociatorsMap.get(server) == null) {
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// CHECKSTYLE:OFF
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ICENegociator iceNegociator = new ICENegociator(server, port, (short) 1);
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negociatorsMap.put(server, iceNegociator);
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// gather candidates
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iceNegociator.gatherCandidateAddresses();
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// priorize candidates
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iceNegociator.prioritizeCandidates();
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// CHECKSTYLE:ON
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}
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}
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this.setInitialized();
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}
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@Override
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public void cancel() throws XMPPException {
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}
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/**
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* Resolve the IP and obtain a valid transport method.
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* @throws SmackException
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* @throws InterruptedException
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*/
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@Override
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public synchronized void resolve(JingleSession session) throws XMPPException, SmackException, InterruptedException {
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this.setResolveInit();
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for (TransportCandidate candidate : this.getCandidatesList()) {
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if (candidate instanceof ICECandidate) {
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ICECandidate iceCandidate = (ICECandidate) candidate;
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iceCandidate.removeCandidateEcho();
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}
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}
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this.clear();
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// Create a transport candidate for each ICE negotiator candidate we have.
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ICENegociator iceNegociator = negociatorsMap.get(server);
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for (Candidate candidate : iceNegociator.getSortedCandidates())
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try {
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Candidate.CandidateType type = candidate.getCandidateType();
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ICECandidate.Type iceType = ICECandidate.Type.local;
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if (type.equals(Candidate.CandidateType.ServerReflexive))
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iceType = ICECandidate.Type.srflx;
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else if (type.equals(Candidate.CandidateType.PeerReflexive))
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iceType = ICECandidate.Type.prflx;
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else if (type.equals(Candidate.CandidateType.Relayed))
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iceType = ICECandidate.Type.relay;
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else
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iceType = ICECandidate.Type.host;
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// JBW/GW - 17JUL08: Figure out the zero-based NIC number for this candidate.
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short nicNum = 0;
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try {
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Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
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short i = 0;
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NetworkInterface nic = NetworkInterface.getByInetAddress(candidate.getAddress().getInetAddress());
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while (nics.hasMoreElements()) {
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NetworkInterface checkNIC = nics.nextElement();
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if (checkNIC.equals(nic)) {
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nicNum = i;
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break;
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}
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i++;
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}
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} catch (SocketException e1) {
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LOGGER.log(Level.WARNING, "exeption", e1);
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}
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TransportCandidate transportCandidate = new ICECandidate(candidate.getAddress().getInetAddress().getHostAddress(), 1, nicNum, String.valueOf(Math.abs(random.nextLong())), candidate.getPort(), "1", candidate.getPriority(), iceType);
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transportCandidate.setLocalIp(candidate.getBase().getAddress().getInetAddress().getHostAddress());
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transportCandidate.setPort(getFreePort());
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try {
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transportCandidate.addCandidateEcho(session);
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}
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catch (SocketException e) {
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LOGGER.log(Level.WARNING, "exception", e);
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}
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this.addCandidate(transportCandidate);
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LOGGER.fine("Candidate addr: " + candidate.getAddress().getInetAddress() + "|" + candidate.getBase().getAddress().getInetAddress() + " Priority:" + candidate.getPriority());
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}
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catch (UtilityException e) {
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LOGGER.log(Level.WARNING, "exception", e);
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}
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catch (UnknownHostException e) {
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LOGGER.log(Level.WARNING, "exception", e);
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}
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// Get a Relay Candidate from XMPP Server
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if (RTPBridge.serviceAvailable(connection)) {
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// try {
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String localIp;
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int network;
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// JBW/GW - 17JUL08: ICENegotiator.getPublicCandidate() always returned null in JSTUN 1.7.0, and now the API doesn't exist in JSTUN 1.7.1
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// if (iceNegociator.getPublicCandidate() != null) {
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// localIp = iceNegociator.getPublicCandidate().getBase().getAddress().getInetAddress().getHostAddress();
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// network = iceNegociator.getPublicCandidate().getNetwork();
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// }
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// else {
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{
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localIp = BridgedResolver.getLocalHost();
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network = 0;
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}
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sid = Math.abs(random.nextLong());
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RTPBridge rtpBridge = RTPBridge.getRTPBridge(connection, String.valueOf(sid));
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TransportCandidate localCandidate = new ICECandidate(
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rtpBridge.getIp(), 1, network, String.valueOf(Math.abs(random.nextLong())), rtpBridge.getPortA(), "1", 0, ICECandidate.Type.relay);
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localCandidate.setLocalIp(localIp);
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TransportCandidate remoteCandidate = new ICECandidate(
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rtpBridge.getIp(), 1, network, String.valueOf(Math.abs(random.nextLong())), rtpBridge.getPortB(), "1", 0, ICECandidate.Type.relay);
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remoteCandidate.setLocalIp(localIp);
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localCandidate.setSymmetric(remoteCandidate);
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remoteCandidate.setSymmetric(localCandidate);
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localCandidate.setPassword(rtpBridge.getPass());
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remoteCandidate.setPassword(rtpBridge.getPass());
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localCandidate.setSessionId(rtpBridge.getSid());
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remoteCandidate.setSessionId(rtpBridge.getSid());
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localCandidate.setConnection(this.connection);
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remoteCandidate.setConnection(this.connection);
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addCandidate(localCandidate);
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// }
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// catch (UtilityException e) {
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// LOGGER.log(Level.WARNING, "exception", e);
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// }
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// catch (UnknownHostException e) {
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// LOGGER.log(Level.WARNING, "exception", e);
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// }
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// Get Public Candidate From XMPP Server
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// JBW/GW - 17JUL08 - ICENegotiator.getPublicCandidate() always returned null in JSTUN 1.7.0, and now it doesn't exist in JSTUN 1.7.1
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// if (iceNegociator.getPublicCandidate() == null) {
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if (true) {
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String publicIp = RTPBridge.getPublicIP(connection);
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if (publicIp != null && !publicIp.equals("")) {
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Enumeration<NetworkInterface> ifaces = null;
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try {
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ifaces = NetworkInterface.getNetworkInterfaces();
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}
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catch (SocketException e) {
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LOGGER.log(Level.WARNING, "exception", e);
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}
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// If detect this address in local machine, don't use it.
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boolean found = false;
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while (ifaces.hasMoreElements() && !false) {
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NetworkInterface iface = ifaces.nextElement();
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Enumeration<InetAddress> iaddresses = iface.getInetAddresses();
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while (iaddresses.hasMoreElements()) {
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InetAddress iaddress = iaddresses.nextElement();
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if (iaddress.getHostAddress().indexOf(publicIp) > -1) {
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found = true;
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break;
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}
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}
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}
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if (!found) {
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try {
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TransportCandidate publicCandidate = new ICECandidate(
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publicIp, 1, 0, String.valueOf(Math.abs(random.nextLong())), getFreePort(), "1", 0, ICECandidate.Type.srflx);
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publicCandidate.setLocalIp(InetAddress.getLocalHost().getHostAddress());
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try {
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publicCandidate.addCandidateEcho(session);
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}
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catch (SocketException e) {
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LOGGER.log(Level.WARNING, "exception", e);
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}
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addCandidate(publicCandidate);
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}
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catch (UnknownHostException e) {
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LOGGER.log(Level.WARNING, "exception", e);
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}
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}
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}
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}
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}
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this.setResolveEnd();
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}
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}
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