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Author: rrosero2000

class/Sniffer.class

@@ -0,0 +1,97 @@
+/**
+ * Esta clase describe las funcionalidad del objeto Sniffer.
+ * @package Sniffer
+ * @subpackage Clases
+ * @author RR Soluciones IT SAS
+ * @version  1.0.0
+ * @copyright 2018
+ */
+package Sniffer.class;
+import java.net.*;
+import java.io.*;
+import jpcap.JpcapCaptor.*;
+import jpcap.JpcapSender;
+import jpcap.NetworkInterface.*;
+import jpcap.NetworkInterfaceAddress;
+import jpcap.packet.*;
+	
+class Sniffer{
+	/**
+	 *@description Variables de la clase
+	 */
+	JpcapCaptor captor;
+    NetworkInterface[] list;
+    String str,info;
+    int x, choice;
+    /**
+     * @function main
+     * @param String args
+     * @description 
+     */
+    public static void main(String args[]){
+    	new Sniffer();
+    }
+    /**
+     * @function Sniffer
+     * @param 
+     * @description Constructor de la clase Sniffer
+     */
+    public Sniffer(){
+    	list = JpcapCaptor.getDeviceList();
+    	System.out.println("Available interfaces: ");
+    	for(x=0; x<list.length; x++){
+    		System.out.println(x+" -> "+list[x].description);
+    	}
+    	choice = Integer.parseInt(obtenerEntrada("Choose interface (0,1..): "));
+    	System.out.println("Listening on interface -> "+list[choice].description);
+    	try{
+    	    captor=JpcapCaptor.openDevice(list[choice], 65535, false, 20);
+    	    captor.setFilter("ip and tcp", true);
+    	}
+    	catch(IOException ioe){ 
+    		ioe.printStackTrace(); 
+    	}
+    	while(true){
+    		Packet info = captor.getPacket();
+    		if(info != null)
+    			System.out.print(obtenerPaquete(info));
+    	}
+    }
+    /**
+     * @function obtenerEntrada
+     * @param String q
+     * @description 
+     */
+    public static String obtenerEntrada(String q){
+    	String input = "";
+    	System.out.print(q);
+    	BufferedReader bufferedreader = new BufferedReader(new InputStreamReader(System.in));
+    	try{
+    		input = bufferedreader.readLine();
+    	}
+    	catch(IOException ioexception){
+    	}
+    	return input;
+    }
+    /**
+     * @function obtenerEntrada
+     * @param String q
+     * @description 
+     */
+    String obtenerPaquete(Packet pack){
+    	int i=0,j=0;
+    	byte[] bytes=new byte[pack.header.length + pack.data.length];
+    	System.arraycopy(pack.header, 0, bytes, 0, pack.header.length);
+    	System.arraycopy(pack.data, 0, bytes, pack.header.length, pack.data.length);
+    	StringBuffer buffer = new StringBuffer();
+    	for(i=0; i<bytes.length;){
+    		for(j=0;j<8 && i<bytes.length;j++,i++){
+    			String d = Integer.toHexString((int)(bytes [i] &0xff));
+    			buffer.append((d.length() == 1 ? "0" + d:d ) + " ");
+    			if(bytes[i]<32 || bytes[i]>126) 
+    				bytes[i] = 46;
+    		}
+    	}
+    	return new String(bytes,i - j, j);
+    }
+}