242 lines
9.4 KiB
Java
242 lines
9.4 KiB
Java
/**
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* $RCSfile: ICEResolver.java,v $
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* $Revision: 1.1 $
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* $Date: 2007/07/02 17:41:07 $
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*
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* Copyright 2003-2005 Jive Software.
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*
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* All rights reserved. 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.nat;
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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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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smackx.jingle.JingleSession;
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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.Random;
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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 a 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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XMPPConnection connection;
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Random random = new Random();
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long sid;
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String server = "stun.xten.net";
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int port = 3478;
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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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public void initialize() throws XMPPException {
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if (!isResolving() && !isResolved()) {
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System.out.println("Initialized");
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iceNegociator = new ICENegociator((short) 1, server, port);
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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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}
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this.setInitialized();
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}
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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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*/
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public synchronized void resolve(JingleSession session) throws XMPPException {
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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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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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TransportCandidate transportCandidate = new ICECandidate(candidate.getAddress().getInetAddress().getHostAddress(), 1, candidate.getNetwork(), 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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e.printStackTrace();
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}
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this.addCandidate(transportCandidate);
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System.out.println("C: " + candidate.getAddress().getInetAddress() + "|" + candidate.getBase().getAddress().getInetAddress() + " p:" + candidate.getPriority());
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}
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catch (UtilityException e) {
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e.printStackTrace();
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}
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catch (UnknownHostException e) {
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e.printStackTrace();
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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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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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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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e.printStackTrace();
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}
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catch (UnknownHostException e) {
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e.printStackTrace();
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}
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// Get Public Candidate From XMPP Server
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if (iceNegociator.getPublicCandidate() == null) {
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String publicIp = RTPBridge.getPublicIP(connection);
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if (publicIp != null && !publicIp.equals("")) {
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Enumeration 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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e.printStackTrace();
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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 = (NetworkInterface) ifaces.nextElement();
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Enumeration iaddresses = iface.getInetAddresses();
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while (iaddresses.hasMoreElements()) {
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InetAddress iaddress = (InetAddress) 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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e.printStackTrace();
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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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e.printStackTrace();
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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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