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package org.openslx.taskmanager.tasks;
import java.net.Socket;
import java.security.cert.X509Certificate;
import javax.net.SocketFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import org.openslx.taskmanager.api.AbstractTask;
import com.google.gson.annotations.Expose;
public class DispatchRelay extends AbstractTask {
protected Output status = new Output();
@Expose
public String[] hosts;
@Expose
public int[] ports;
@Expose
public String[] descs;
@Override
protected boolean execute()
{
Socket[] sockets;
Thread[] relayThreads;
try {
sockets = createSockets( getSocketFactory() );
status.addMessage( "Sockets connected." );
} catch ( Exception e ) {
status.addMessage( "Failed to connect sockets. " + e.getMessage() );
return false;
}
try {
relayThreads = createRelayThreads( sockets );
status.addMessage( "Relays created." );
} catch ( IOException iox ) {
status.addMessage( "Failed to create relays. " + iox.getMessage() );
return false;
}
for ( Thread t : relayThreads )
t.start();
try {
for ( Thread t : relayThreads )
t.join();
} catch ( InterruptedException inx ) {} finally {
try {
for ( Socket s : sockets ) {
if ( !s.isClosed() )
s.close();
}
status.addMessage( "Sockets closed properly." );
} catch ( IOException iox ) {
status.addMessage( "Failed to close Sockets. " + iox.getMessage() );
}
}
return true;
}
@Override
protected boolean initTask()
{
this.setStatusObject( this.status );
if ( hosts.length != 2 || ports.length != 2 ) {
this.status.addMessage( "Invalid host/port list." );
return false;
}
this.status.addMessage( "Initiated relay task: " + this.getClass().getName() );
this.status.addMessage( this.descs[0] + " is " + this.hosts[0] + ":" + this.ports[0] );
this.status.addMessage( this.descs[1] + " is " + this.hosts[1] + ":" + this.ports[1] );
return true;
}
protected Thread[] createRelayThreads ( Socket[] sockets) throws IOException
{
Thread[] t = new Thread[2];
Socket[][] s = { sockets, { sockets[1], sockets[0] }};
for ( int i = 0; i < 2; i++ ) {
t[i] = new Thread( new Relay( s[i], status, descs[i] ));
}
return t;
}
protected SSLSocketFactory getSocketFactory () throws Exception {
status.addMessage( "Using TLS/SSL encryption." );
return trustAll().getSocketFactory();
}
protected SSLContext trustAll () throws Exception {
TrustManager[] trustAllMan = new TrustManager[] { new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted( X509Certificate[] certs, String authType ) {}
public void checkServerTrusted( X509Certificate[] certs, String authType ) {}
}
};
SSLContext ctx = SSLContext.getInstance( "SSL" );
ctx.init( null, trustAllMan, new java.security.SecureRandom() );
return ctx;
}
protected SSLSocket[] createSockets ( SocketFactory sf ) throws IOException
{
SSLSocket[] s = new SSLSocket[2];
for ( int i = 0; i < 2; i++ ) {
InetSocketAddress addr = new InetSocketAddress( hosts[i], ports[i] );
s[i] = (SSLSocket) sf.createSocket();
this.status.addMessage( "trying to connect socket to " + addr.toString() );
s[i].connect( addr, 1200 );
this.status.addMessage( "connected." );
}
return s;
}
public static class Output
{
protected String messages = null;
public void addMessage( String str )
{
if ( messages == null )
{
messages = str;
} else {
messages += "\n" + str;
}
}
}
private class Relay implements Runnable {
private InputStream in;
private OutputStream out;
private Output status;
public final String desc;
private byte[] buffer = new byte[16384];
public Relay ( Socket[] s, Output status, String desc ) throws IOException
{
in = s[0].getInputStream();
out = s[1].getOutputStream();
this.status = status;
this.desc = desc;
}
private void relay() throws IOException, InterruptedException
{
int readBytes = in.read( buffer );
out.write( buffer, 0, readBytes );
}
public void close()
{
try {
if ( this.in != null )
this.in.close();
if ( this.out != null )
this.out.close();
this.status.addMessage( desc + ": input/output streams closed properly." );
} catch ( IOException iox ) {
this.status.addMessage( desc + ": failed to close input/ouput streams. " + iox.getMessage() );
}
}
@Override
public void run()
{
boolean first = true;
while ( true ) {
try {
relay();
if ( first ) {
this.status.addMessage( desc + ": relay operating." );
first = false;
}
} catch ( Exception x ) {
this.status.addMessage( desc + ": close relay. " );
this.close();
return;
}
}
}
}
}
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