140 lines
4.3 KiB
Java
140 lines
4.3 KiB
Java
/**
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*
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* Copyright the original author or authors
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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.nat;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetAddress;
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import java.net.Socket;
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import java.util.logging.Logger;
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/**
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* A Simple and Experimental Bridge.
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* It Creates a TCP Socket That Connects to another TCP Socket Listener and forwards every packets received to an UDP Listener.
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* And forwards every packets received in UDP Socket, to the TCP Server
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*/
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public class TcpUdpBridgeClient {
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private static final Logger LOGGER = Logger.getLogger(TcpUdpBridgeClient.class.getName());
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private String remoteTcpHost = null;
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private String remoteUdpHost = null;
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private int remoteTcpPort = -1;
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private int remoteUdpPort = -1;
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private int localUdpPort = -1;
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private DatagramSocket localUdpSocket;
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private Socket localTcpSocket;
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public TcpUdpBridgeClient(String remoteTcpHost, String remoteUdpHost, int remoteTcpPort, int remoteUdpPort) {
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this.remoteTcpHost = remoteTcpHost;
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this.remoteUdpHost = remoteUdpHost;
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this.remoteTcpPort = remoteTcpPort;
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this.remoteUdpPort = remoteUdpPort;
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try {
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localTcpSocket = new Socket(remoteTcpHost, remoteTcpPort);
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localUdpSocket = new DatagramSocket(0);
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localUdpPort = localUdpSocket.getLocalPort();
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LOGGER.fine("UDP: " + localUdpSocket.getLocalPort());
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}
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catch (IOException e) {
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e.printStackTrace();
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}
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startBridge();
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}
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public void startBridge() {
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final Thread process = new Thread(new Runnable() {
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public void run() {
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try {
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OutputStream out = localTcpSocket.getOutputStream();
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while (true) {
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byte[] b = new byte[500];
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DatagramPacket p = new DatagramPacket(b, 500);
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localUdpSocket.receive(p);
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if (p.getLength() == 0) continue;
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LOGGER.fine("UDP Client Received and Sending to TCP Server:"+new String(p.getData(),0,p.getLength(),"UTF-8"));
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out.write(p.getData(), 0, p.getLength());
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out.flush();
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LOGGER.fine("Client Flush");
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}
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}
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catch (IOException e) {
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e.printStackTrace();
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}
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}
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});
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new Thread(new Runnable() {
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public void run() {
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try {
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InputStream in = localTcpSocket.getInputStream();
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InetAddress remoteHost = InetAddress.getByName(remoteUdpHost);
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process.start();
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while (true) {
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byte[] b = new byte[500];
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int s = in.read(b);
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//if (s == -1) continue;
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LOGGER.fine("TCP Client:" +new String(b,0,s,"UTF-8"));
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DatagramPacket udpPacket = new DatagramPacket(b, s);
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udpPacket.setAddress(remoteHost);
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udpPacket.setPort(remoteUdpPort);
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localUdpSocket.send(udpPacket);
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}
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}
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catch (IOException e) {
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e.printStackTrace();
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}
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}
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}).start();
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}
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public Socket getLocalTcpSocket() {
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return localTcpSocket;
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}
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public DatagramSocket getLocalUdpSocket() {
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return localUdpSocket;
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}
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}
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