[HaBo]

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;

public class WanIPAuth {
	private static String erg;
	private static String status;
	public static void main(String[] args) throws MessagingException {
		new WanIPAuth().run();
		
	}

	private void run() throws MessagingException {

		try {
			Socket socket = new Socket("213.202.225.69",80);
			InputStream fromServer = socket.getInputStream();
			OutputStream toServer = socket.getOutputStream();
			FileOutputStream fos = new FileOutputStream("ip.txt");
			
			
			byte[] buffer = new byte[10];
			@SuppressWarnings("unused")
			int anzahl_gelesener_bytes;
			String s = "GET http://hanfst0n3d.ha.funpic.de/phpwanip.php HTTP/1.0\n\n";
			
			toServer.write(s.getBytes());
			while((anzahl_gelesener_bytes = fromServer.read(buffer)) != -1){
				fos.write(buffer);
			}

			
			fromServer.close();
			toServer.close();
			socket.close();
			
			FileInputStream fis = new FileInputStream("ip.txt");
			BufferedInputStream bis = new BufferedInputStream(fis);

			InputStreamReader reader = new InputStreamReader(bis);
			char[] chars = new char[1024];
			int length = 1;
			StringBuffer text = new StringBuffer();
			while (length > 0) {
				length = reader.read(chars);
				if (length >= 0)
					text.append(chars, 0, length);
			}
			
			erg = text.toString();
			
			Pattern p = Pattern.compile("[0-9]{1,3}[.][0-9]{1,3}[.][0-9]{1,3}[.][0-9]{1,3}");
			Matcher m = p.matcher(erg);
			m.find();
			erg = erg.substring(m.start(), m.end());
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		
		if(status!=erg){
			Message message = new MimeMessage(getSession());
	
			message.addRecipient(RecipientType.TO, new InternetAddress("")); // hier deine ziel addy
			message.addFrom(new InternetAddress[] { new InternetAddress("") }); // von welcher addy die mail kommen soll
	
			message.setSubject(""); // hier dein subject der mail
			
			message.setContent(erg, "text/plain");
			
			Transport.send(message);
		}
		
	}

	private Session getSession() {
		Authenticator authenticator = new Authenticator();

		Properties properties = new Properties();
		properties.setProperty("mail.smtp.submitter", authenticator.getPasswordAuthentication().getUserName());
		properties.setProperty("mail.smtp.auth", "true");

		properties.setProperty("mail.smtp.host", "smtp.gmx.net");
		properties.setProperty("mail.smtp.port", "25");

		return Session.getInstance(properties, authenticator);
	}

	private class Authenticator extends javax.mail.Authenticator {
		private PasswordAuthentication authentication;

		public Authenticator() {
			String username = ""; // nick@addy.de;
			String password = ""; // das pw;
			authentication = new PasswordAuthentication(username, password);
		}

		protected PasswordAuthentication getPasswordAuthentication() {
			return authentication;
		}
	}
}