import java.io.*;
import jpcap.*;
import jpcap.packet.*;
import java.lang.*;

public class JpcapTip implements PacketReceiver
{  
      static long p=0,q=0;           
      IPPacket ip;
      String s,s1;
      Long s2;   
      int count=1;//定義抓包次數(shù)記錄     
      public void receivePacket(Packet packet)   //實(shí)現(xiàn)接口PacketReceiver類中的receivePacket方法
      { 
          if(packet instanceof IPPacket) //判斷是否為IP數(shù)據(jù)包(只對(duì)IP數(shù)據(jù)包進(jìn)行處理)
          { 
              count++;
             System.out.println("ok"+count);    //屏幕輸出IP數(shù)據(jù)包的信息   
              ip=(IPPacket)packet;     
              try 
              {
                     System.out.println(ip.src_ip+"\t"+ip.dst_ip+"\t"+ip.protocol+"\t"+
                     ip.length+"\t"+ip.version+"\t"+ip.ident+"\t"+
                     ip.rsv_frag+"\t"+ip.offset+"\t"+ip.hop_limit+"\t"+ip.rsv_tos+ip.data+"\r\n");
                      RandomAccessFile rf = new RandomAccessFile("packet.txt", "rw"); //把IP數(shù)據(jù)包寫入到文本文件
                      rf.seek(rf.length());   //定位文件指針在文件中的最后
                      rf.writeBytes(ip.src_ip+"\t"+ip.dst_ip+"\t"+ip.protocol+"\t"+
                      ip.length+"\t"+ip.version+"\t"+ip.ident+"\t"+
                      ip.rsv_frag+"\t"+ip.offset+"\t"+ip.hop_limit+"\t"+
                      ip.rsv_tos+ip.data+"\r\n");      /*向txt文件寫入IP的源地址,目標(biāo)地址,高層協(xié)議,長(zhǎng)度, 版本號(hào),標(biāo)識(shí)符(序號(hào)),標(biāo)志,段偏移量,數(shù)據(jù)報(bào)的壽命數(shù)值,服務(wù)型號(hào),數(shù)據(jù)*/
                      rf.close();
                    
                 }
                 catch (Exception e) {
                      e.printStackTrace();
                 }
 
          }
                   
      }     
      public static void main(String[] args) throws java.io.IOException
      {
    	  NetworkInterface[] devices =  JpcapCaptor.getDeviceList(); //獲取設(shè)備列表名
    	  NetworkInterface deviceName = devices[1];   // 打開網(wǎng)卡設(shè)備
                  JpcapCaptor jpcap =  JpcapCaptor.openDevice(deviceName, 1028, true, 100);
            /*即將打開的設(shè)備名 從設(shè)備上一次讀取的最大字節(jié)數(shù) 說明是否將設(shè)備設(shè)為混雜模式的Boolean值
            超時(shí)值 */
                jpcap.loopPacket(100000, new JpcapTip()); //循環(huán)獲取100000個(gè)數(shù)據(jù)包
      }
    
}