java获取固定IP发来所有的数据包,需要实现网络嗅探的部分功能:
代码如下;
/JpcapTipjava
/
package m;
import jpcapPacketReceiver;
import jpcapJpcapCaptor;
import jpcappacket;
import jpcapNetworkInterface;
import jpcapNetworkInterfaceAddress;
//import javanetInetAddress;
//import javanetUnknownHostException;
public class JpcapTip implements PacketReceiver {
public void receivePacket(Packet packet) {
Systemoutprintln("");
/IP数据报报文头/
byte[] l=packetheader;
/
for (int t=0;t<21;t++){
Systemoutprint(l[t]+" ");
}
/
String str="";
Systemoutprint("报文头 : ");
for (int i=0;i<llength;i++) {
//str=str+l;
int m=0;
m=l[i];
m=m<<24;
m=m>>>24;
str=str+IntegertoHexString(m);
//Systemoutprint(" "+l[i]);
}
Systemoutprintln(str);
int d=llength;
Systemoutprintln("首部长度 :"+(d8)+"bit");
/分析源IP地址和目的IP地址/
/分析协议类型/
/
if(packetgetClass()equals(IPPacketclass)) {
IPPacket ipPacket=(IPPacket)packet;
byte[] iph=ipPacketoption;
String iphstr=new String(iph);
Systemoutprintln(iphstr);
}
/
if(packetgetClass()equals(ARPPacketclass))
{
Systemoutprintln("协议类型 :ARP协议");
try {
ARPPacket arpPacket = (ARPPacket)packet;
Systemoutprintln("源网卡MAC地址为 :"+arpPacketgetSenderHardwareAddress());
Systemoutprintln("源IP地址为 :"+arpPacketgetSenderProtocolAddress());
Systemoutprintln("目的网卡MAC地址为 :"+arpPacketgetTargetHardwareAddress());
Systemoutprintln("目的IP地址为 :"+arpPacketgetTargetProtocolAddress());
} catch( Exception e ) {
eprintStackTrace();
}
}
else
if(packetgetClass()equals(UDPPacketclass))
{
Systemoutprintln("协议类型 :UDP协议");
try {
UDPPacket udpPacket = (UDPPacket)packet;
Systemoutprintln("源IP地址为 :"+udpPacketsrc_ip);
int tport = udpPacketsrc_port;
Systemoutprintln("源端口为:"+tport);
Systemoutprintln("目的IP地址为 :"+udpPacketdst_ip);
int lport = udpPacketdst_port;
Systemoutprintln("目的端口为:"+lport);
} catch( Exception e ) {
eprintStackTrace();
}
}
else
if(packetgetClass()equals(TCPPacketclass)) {
Systemoutprintln("协议类型 :TCP协议");
try {
TCPPacket tcpPacket = (TCPPacket)packet;
int tport = tcpPacketsrc_port;
Systemoutprintln("源IP地址为 :"+tcpPacketsrc_ip);
Systemoutprintln("源端口为:"+tport);
Systemoutprintln("目的IP地址为 :"+tcpPacketdst_ip);
int lport = tcpPacketdst_port;
Systemoutprintln("目的端口为:"+lport);
} catch( Exception e ) {
eprintStackTrace();
}
}
else
if(packetgetClass()equals(ICMPPacketclass))
Systemoutprintln("协议类型 :ICMP协议");
else
Systemoutprintln("协议类型 :GGP、EGP、JGP协议或OSPF协议或ISO的第4类运输协议TP4");
/IP数据报文数据/
byte[] k=packetdata;
String str1="";
Systemoutprint("数据 : ");
for(int i=0;i<klength;i++) {
//int m=0;
//m=k[i];
//m=m<<24;
//m=m>>>24;
//str1=str+IntegertoHexString(m);
str1 = new String(k);
//str1=str1+k[i];
//Systemoutprint(" "+k[i]);
}
Systemoutprintln(str1);
Systemoutprintln("数据报类型 : "+packetgetClass());
Systemoutprintln("");
}
public static void main(String[] args) throws Exception{
// TODO 自动生成方法存根
NetworkInterface[] devices = JpcapCaptorgetDeviceList(); //getDeviceList();
//for (int i =0; i<deviceslength;i++) {
int a=0;
//try {
/本地网络信息/
byte[] b=devices[1]mac_address; //网卡物理地址
//}
//catch() {}
Systemoutprint("网卡MAC : 00");
for (int j=0;j<blength;j++){
//a=a<<8;
a=b[j];
a=a<<24;
a=a>>>24;
Systemoutprint(IntegertoHexString(a));
}
Systemoutprintln();
NetworkInterfaceAddress[] k=devices[1]addresses;
//Systemoutprintln("网卡MAC : "+IntegertoHexString(a));
for(int n=0;n<klength;n++) {
Systemoutprintln("本机IP地址 : "+k[n]address); //本机IP地址
Systemoutprintln("子网掩码 : "+k[n]subnet); //子网掩码
}
Systemoutprintln("网络连接类型 : "+devices[1]datalink_description);
//}
NetworkInterface deviceName = devices[1];
/将网卡设为混杂模式下用网络设备deviceName/
JpcapCaptor jpcap =JpcapCaptoropenDevice(deviceName, 2000, false, 1); //openDevice(deviceName,1028,false,1);
jpcaploopPacket(-1,new JpcapTip());
}
}检查有没有导入以下类
import jpcapJpcapCaptor;
import jpcapNetworkInterface;
import jpcapNetworkInterfaceAddress;
检查jpcap是否正确安装
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