import java.nio.ByteBuffer;
import java.util.Random;
/*
* Java Bittorrent API as its name indicates is a JAVA API that implements the Bittorrent Protocol
* This project contains two packages:
* 1. jBittorrentAPI is the "client" part, i.e. it implements all classes needed to publish
* files, share them and download them.
* This package also contains example classes on how a developer could create new applications.
* 2. trackerBT is the "tracker" part, i.e. it implements a all classes needed to run
* a Bittorrent tracker that coordinates peers exchanges. *
*
* Copyright (C) 2007 Baptiste Dubuis, Artificial Intelligence Laboratory, EPFL
*
* This file is part of jbittorrentapi-v1.0.zip
*
* Java Bittorrent API is free software and a free user study set-up;
* you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Java Bittorrent API is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Java Bittorrent API; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @version 1.0
* @author Baptiste Dubuis
* To contact the author:
* email: baptiste.dubuis@gmail.com
*
* More information about Java Bittorrent API:
* http://sourceforge.net/projects/bitext/
*/
//package atorrentapi;
class Main {
/**
* Generate the client id, which is a fixed string of length 8 concatenated
* with 12 random bytes
*
* @return byte[]
*/
public static byte[] generateID() {
byte[] id = new byte[12];
Random r = new Random(System.currentTimeMillis());
r.nextBytes(id);
return concat("-ANDRTR-".getBytes(), id);
}
/**
* Concatenate the 2 byte arrays
*
* @param a
* byte[]
* @param b
* byte[]
* @return byte[]
*/
public static byte[] concat2(byte[] a, byte[] b) {
ByteBuffer bb = ByteBuffer.allocate(a.length + b.length);
bb.put(a);
bb.put(b);
return bb.array();
}
/**
* Concatenate the 2 byte arrays
*
* @param b1
* byte[]
* @param b2
* byte[]
* @return byte[]
*/
public static byte[] concat(byte[] b1, byte[] b2) {
// Log.v("AndroidTor","size of the new byte array is "+(b1.length +
// b2.length));
byte[] b3 = new byte[b1.length + b2.length];
System.arraycopy(b1, 0, b3, 0, b1.length);
System.arraycopy(b2, 0, b3, b1.length, b2.length);
return b3;
}
/**
* Concatenate the byte array and the byte
*
* @param b1
* byte[]
* @param b2
* byte
* @return byte[]
*/
public static byte[] concat(byte[] b1, byte b2) {
byte[] b3 = new byte[b1.length + 1];
byte[] temp = new byte[] { b2 };
System.arraycopy(b1, 0, b3, 0, b1.length);
System.arraycopy(temp, 0, b3, b1.length, 1);
return b3;
}
}