java使用jpcap抓包工具獲得本機發送的所有tcp請求

java使用jpcap抓包工具獲得本機發送的所有tcp請求，根據tcp請求的內容可以調試某個應用啟動后對外發送的相關http請求或者sql連接請求，這樣可以很好的調試我們的程序。很不錯的一種應用無侵入性的調試本機發送的http接口，sql連接接口等。

import java.io.UnsupportedEncodingException;
import java.net.InetAddress;

import jpcap.*;
import jpcap.packet.EthernetPacket;
import jpcap.packet.Packet;
import jpcap.packet.TCPPacket;

class Tcpdump implements PacketReceiver {
    public void receivePacket(Packet packet) {
//      System.out.println(packet);

        if (packet instanceof TCPPacket) {
            TCPPacket tcpPacket = (TCPPacket) packet;
            if(tcpPacket.src_ip.getHostAddress().equals(getIp())){
                EthernetPacket ethernetPacket = (EthernetPacket) packet.datalink;
                System.out.print("源IP：" + tcpPacket.src_ip + "  目的IP："
                        + tcpPacket.dst_ip + "發送端口：" + tcpPacket.src_port
                        + " 接收端口：" + tcpPacket.dst_port + "\n");
                System.out
                        .print("源MAC：" + ethernetPacket.getSourceAddress()
                                + " 目的MAC："
                                + ethernetPacket.getDestinationAddress() + "\n");
                System.out.print("協議：" + tcpPacket.protocol + "\n");
                System.out.print("數據：\n");
                try {
                    System.out.println(new String(tcpPacket.data,"utf-8"));
                } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
//              for (int i = 0; i < tcpPacket.data.length; i++)
//                  System.out.print((char) tcpPacket.data[i]); 
            }
        }

    }

    public static String getIp(){
        InetAddress inet = null;
        try {
            inet = InetAddress.getLocalHost();
            String ip = inet.getHostAddress();  //在某些linux機器上取到的ip是host綁定的本機ip，即127.0.0.1
            return ip;
        }catch(Exception e){

        }
        return null;
    }
} 

我先啟動給一個查詢數據庫的一個應用，然后再啟動下面的程序，

輸出結果如下：