import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.net.*;
import java.io.*;
import static java.lang.Thread.sleep;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFrame;
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author D3v4sTo
 */
public class DoS extends JFrame implements WindowListener, ActionListener {

    private final DatagramSocket socket;
    String IP_address; //Indirizzo IP del server
    int UDP_port = 7;   //Porta del applicazione lato server, nel nostro caso la port è 7
    int n_pacchetti; //Numero di pacchetti da inoltrare
    
    public DoS() throws SocketException {
        
        socket = new DatagramSocket();
        socket.setSoTimeout(1000); // 1000ms = 1s
        
        initComponents();
        setTitle("DoS By Domenico Festa");
        getContentPane().setBackground(new Color(0,0,0));
    }

    public void close_socket() {
        socket.close();
    }
    
    public String sendAndReceive( String request, String host, int port) throws UnknownHostException, IOException, SocketTimeoutException {
        byte[] buffer;
        DatagramPacket datagram;
        String answer;

        // indirizzo IP del destinatario del datagram
        InetAddress address = InetAddress.getByName(host);
        
        // verifica chiusura socket
        if ( socket.isClosed()) {
            throw new IOException();
        }
        // trasformazione in array di byte della stringa
        buffer = request.getBytes("UTF-8");
        // costruzione datagram di richiesta
        datagram = new DatagramPacket( buffer, buffer.length, address, port);
        socket.send(datagram); // trasmissione datagram di richiesta
        // attesa ricezione datagram di richiesta (tempo massimo di attesa: 1s)
        socket.receive(datagram);
        // verifica indirizzo/porta provenienza datagram di risposta
        if ( datagram.getAddress().equals(address) && datagram.getPort() == port) {
            answer = new String( datagram.getData(), 0, datagram.getLength(), "ISO-8859-1");
        }
        else {
            throw new SocketTimeoutException();
        }
        return answer;
    }
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */    
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel2 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jPanel1 = new javax.swing.JPanel();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        Avvio = new javax.swing.JButton();
        IP = new javax.swing.JFormattedTextField();
        Porta = new javax.swing.JFormattedTextField();
        jLabel2 = new javax.swing.JLabel();
        jSlider1 = new javax.swing.JSlider();
        jLabel3 = new javax.swing.JLabel();
        jLabel7 = new javax.swing.JLabel();
        jLabel8 = new javax.swing.JLabel();
        Mostra = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jScrollPane1 = new javax.swing.JScrollPane();
        JTraffico = new javax.swing.JTextArea();
        Esci = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setBackground(new java.awt.Color(0, 0, 0));
        getContentPane().setLayout(new java.awt.FlowLayout());

        jPanel2.setBackground(new java.awt.Color(0, 0, 0));

        jLabel1.setFont(new java.awt.Font("Demonized", 0, 24)); // NOI18N
        jLabel1.setForeground(new java.awt.Color(204, 204, 0));
        jLabel1.setText("DoS");

        jPanel1.setBackground(new java.awt.Color(0, 0, 0));

        jLabel5.setFont(new java.awt.Font("Demonized", 0, 14)); // NOI18N
        jLabel5.setForeground(new java.awt.Color(153, 153, 0));
        jLabel5.setText("Indirizzo IP:");

        jLabel6.setFont(new java.awt.Font("Demonized", 0, 14)); // NOI18N
        jLabel6.setForeground(new java.awt.Color(0, 102, 0));
        jLabel6.setText("Numero di Porta:");

        Avvio.setFont(new java.awt.Font("Demonized", 0, 14)); // NOI18N
        Avvio.setForeground(new java.awt.Color(204, 0, 0));
        Avvio.setText("Avvia");
        Avvio.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                AvvioActionPerformed(evt);
            }
        });

        IP.setText("127.0.0.1");
        IP.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                IPActionPerformed(evt);
            }
        });

        Porta.setText("7");
        Porta.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                PortaActionPerformed(evt);
            }
        });

        jLabel2.setFont(new java.awt.Font("Demonized", 0, 18)); // NOI18N
        jLabel2.setForeground(new java.awt.Color(0, 102, 153));
        jLabel2.setText("Numero Pacchetti da inoltrare:");

        jSlider1.setMinimum(1);
        jSlider1.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
            public void mouseMoved(java.awt.event.MouseEvent evt) {
                jSlider1MouseMoved(evt);
            }
        });

        jLabel3.setFont(new java.awt.Font("Demonized", 1, 14)); // NOI18N
        jLabel3.setForeground(new java.awt.Color(255, 255, 255));
        jLabel3.setText("50");

        jLabel7.setFont(new java.awt.Font("Demonized", 1, 14)); // NOI18N
        jLabel7.setForeground(new java.awt.Color(255, 255, 255));
        jLabel7.setText("100");

        jLabel8.setFont(new java.awt.Font("Demonized", 1, 14)); // NOI18N
        jLabel8.setForeground(new java.awt.Color(255, 255, 255));
        jLabel8.setText("1");

        Mostra.setFont(new java.awt.Font("Demonized", 0, 14)); // NOI18N
        Mostra.setForeground(new java.awt.Color(255, 255, 255));

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jSlider1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGap(0, 12, Short.MAX_VALUE)
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                                        .addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 161, javax.swing.GroupLayout.PREFERRED_SIZE)
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED))
                                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                                        .addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 124, javax.swing.GroupLayout.PREFERRED_SIZE)
                                        .addGap(36, 36, 36)))
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(Avvio, javax.swing.GroupLayout.DEFAULT_SIZE, 156, Short.MAX_VALUE)
                                    .addComponent(IP)
                                    .addComponent(Porta))))
                        .addGap(28, 28, 28))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel8)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(132, 132, 132)
                        .addComponent(jLabel7)
                        .addContainerGap())))
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(105, 105, 105)
                .addComponent(Mostra, javax.swing.GroupLayout.PREFERRED_SIZE, 161, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(0, 0, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel5)
                    .addComponent(IP, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel6)
                    .addComponent(Porta, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(jLabel8)
                    .addComponent(jLabel7))
                .addGap(18, 18, 18)
                .addComponent(jSlider1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(Mostra, javax.swing.GroupLayout.DEFAULT_SIZE, 30, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addComponent(Avvio, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );

        jLabel4.setFont(new java.awt.Font("Segoe Print", 0, 14)); // NOI18N
        jLabel4.setForeground(new java.awt.Color(153, 255, 255));
        jLabel4.setText("By Domenico Festa");

        JTraffico.setEditable(false);
        JTraffico.setColumns(20);
        JTraffico.setFont(new java.awt.Font("Monospaced", 0, 14)); // NOI18N
        JTraffico.setRows(5);
        jScrollPane1.setViewportView(JTraffico);

        Esci.setFont(new java.awt.Font("Demonized", 0, 14)); // NOI18N
        Esci.setForeground(new java.awt.Color(204, 0, 0));
        Esci.setText("Termina");
        Esci.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                EsciActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                        .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(138, 138, 138))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(jPanel2Layout.createSequentialGroup()
                                .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 147, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 55, Short.MAX_VALUE)
                                .addComponent(Esci, javax.swing.GroupLayout.PREFERRED_SIZE, 175, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addComponent(jScrollPane1))
                        .addContainerGap())
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                        .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap())))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 149, Short.MAX_VALUE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(Esci, javax.swing.GroupLayout.PREFERRED_SIZE, 32, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(0, 0, 0))
        );

        getContentPane().add(jPanel2);

        pack();
    }// </editor-fold>                        
    
    private void EsciActionPerformed(java.awt.event.ActionEvent evt) {                                     
        // TODO add your handling code here:
        System.exit(0);
    }                                    

    private void AvvioActionPerformed(java.awt.event.ActionEvent evt) {                                      
        // TODO add your handling code here:
    String IP = IP_address;
    int port = UDP_port;
    String request = "Traffico inviato", answer;
    DoSClient client;

        try {
                
    for(int i = 0; i < n_pacchetti; i++){
        
            client = new DoSClient();
            answer = client.sendAndReceive(request, IP, port);
            JTraffico.append(String.valueOf( answer + " \n " ));
            client.close_socket();
    }
        }
        catch (SocketException exception) {
            JTraffico.append(String.valueOf("Errore creazione socket! \n"));
        }
        catch (UnknownHostException exception) {
            JTraffico.append(String.valueOf("Indirizzo IP errato! \n"));
        }
        catch (SocketTimeoutException exception) {
            JTraffico.append(String.valueOf("Nessuna risposta dal server! \n"));
        }
        catch (IOException exception) {
            JTraffico.append(String.valueOf("Errore generico di comunicazione! \n"));
        }
    }                                     

    private void PortaActionPerformed(java.awt.event.ActionEvent evt) {                                      
        // TODO add your handling code here:
       UDP_port = Integer.parseInt(Porta.getText()); //trasforma la stringa in un intero
    }                                     

    private void IPActionPerformed(java.awt.event.ActionEvent evt) {                                   
        // TODO add your handling code here:
        IP_address = IP.getText();
    }                                  

    private void jSlider1MouseMoved(java.awt.event.MouseEvent evt) {                                    
        // TODO add your handling code here:
        n_pacchetti = jSlider1.getValue();
        Mostra.setText(" Pacchetti: " + n_pacchetti);
    }                                   

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(DoS.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
        
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(() -> {
            try {
                new DoS().setVisible(true);
            } catch (SocketException ex) {
                Logger.getLogger(DoS.class.getName()).log(Level.SEVERE, null, ex);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton Avvio;
    private javax.swing.JButton Esci;
    private javax.swing.JFormattedTextField IP;
    private javax.swing.JTextArea JTraffico;
    private javax.swing.JLabel Mostra;
    private javax.swing.JFormattedTextField Porta;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JLabel jLabel8;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JSlider jSlider1;
    // End of variables declaration                   

    @Override
    public void windowOpened(WindowEvent we) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowClosing(WindowEvent we) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowClosed(WindowEvent we) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowIconified(WindowEvent we) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowDeiconified(WindowEvent we) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowActivated(WindowEvent we) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void windowDeactivated(WindowEvent we) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void actionPerformed(ActionEvent ae) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

}