org.jivesoftware.smackx.jingleold.nat.TcpUdpBridgeClient Maven / Gradle / Ivy
/**
*
* Copyright the original author or authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.jingleold.nat;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A Simple and Experimental Bridge.
* It Creates a TCP Socket That Connects to another TCP Socket Listener and forwards every packets received to an UDP Listener.
* And forwards every packets received in UDP Socket, to the TCP Server
*/
@SuppressWarnings("UnusedVariable")
public class TcpUdpBridgeClient {
private static final Logger LOGGER = Logger.getLogger(TcpUdpBridgeClient.class.getName());
private String remoteTcpHost = null;
private String remoteUdpHost = null;
private int remoteTcpPort = -1;
private int remoteUdpPort = -1;
private int localUdpPort = -1;
private DatagramSocket localUdpSocket;
private Socket localTcpSocket;
public TcpUdpBridgeClient(String remoteTcpHost, String remoteUdpHost, int remoteTcpPort, int remoteUdpPort) {
this.remoteTcpHost = remoteTcpHost;
this.remoteUdpHost = remoteUdpHost;
this.remoteTcpPort = remoteTcpPort;
this.remoteUdpPort = remoteUdpPort;
try {
localTcpSocket = new Socket(remoteTcpHost, remoteTcpPort);
localUdpSocket = new DatagramSocket(0);
localUdpPort = localUdpSocket.getLocalPort();
LOGGER.fine("UDP: " + localUdpSocket.getLocalPort());
}
catch (IOException e) {
LOGGER.log(Level.WARNING, "exception", e);
}
startBridge();
}
public void startBridge() {
final Thread process = new Thread(new Runnable() {
@Override
public void run() {
try {
OutputStream out = localTcpSocket.getOutputStream();
while (true) {
byte[] b = new byte[500];
DatagramPacket p = new DatagramPacket(b, 500);
localUdpSocket.receive(p);
if (p.getLength() == 0) continue;
LOGGER.fine("UDP Client Received and Sending to TCP Server:" + new String(p.getData(), 0, p.getLength(), "UTF-8"));
out.write(p.getData(), 0, p.getLength());
out.flush();
LOGGER.fine("Client Flush");
}
}
catch (IOException e) {
LOGGER.log(Level.WARNING, "exception", e);
}
}
});
new Thread(new Runnable() {
@Override
public void run() {
try {
InputStream in = localTcpSocket.getInputStream();
InetAddress remoteHost = InetAddress.getByName(remoteUdpHost);
process.start();
while (true) {
byte[] b = new byte[500];
int s = in.read(b);
// if (s == -1) continue;
LOGGER.fine("TCP Client:" + new String(b, 0, s, "UTF-8"));
DatagramPacket udpPacket = new DatagramPacket(b, s);
udpPacket.setAddress(remoteHost);
udpPacket.setPort(remoteUdpPort);
localUdpSocket.send(udpPacket);
}
}
catch (IOException e) {
LOGGER.log(Level.WARNING, "exception", e);
}
}
}).start();
}
public Socket getLocalTcpSocket() {
return localTcpSocket;
}
public DatagramSocket getLocalUdpSocket() {
return localUdpSocket;
}
}