如何使用jnetpcap库从脱机pcap文件中提取协议字段,源ip和目标ip?
答案 0 :(得分:5)
对于TCP / IP堆栈:我们可以根据tcp头的端口号
获取协议以下链接提供了与不同协议对应的端口号:http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml
在jnetpap库中获取协议(http://jnetpcap.com):
PcapPacket packet = //get from somewhere
Tcp tcp = new Tcp();
Ip4 ip = new IP4();
byte[] sIP = new byte[4];
byte[] dIP = new byte[4];
String sourceIP = "";
String destIP = "";
if(packet.hasHeader(ip) && packet.hasHeader(tcp)){
sIP = packet.getHeader(ip).source();
sourceIP = org.jnetpcap.packet.format.FormatUtils.ip(sIP);
dIP = packet.getHeader(ip).destination();
destIP = org.jnetpcap.packet.format.FormatUtils.ip(dIP);
System.out.println("*" + sourceIP + "*" + destIP);
System.out.println("Source IP" + sourceIP);
System.out.println("Destination IP" + destIP);
if(tcp.source() == 80){
System.out.println("HTTP protocol");
} else if(tcp.source == 23) {
System.out.println("Telnet protocol");
}
}