Python实现Windows环境下的网络抓包与数据包解析

from scapy.sendrecv import sniff
from scapy.utils import wrpcap
dpkt = sniff(count = 100)  #这里是针对单网卡的机子，多网卡的可以在参数中指定网卡
wrpcap("demo.pcap", dpkt)

import dpkt
import socket
import datetime
def printPcap(pcap):
try:
for timestamp, buf in pcap:
eth = dpkt.ethernet.Ethernet(buf) #获得以太包，即数据链路层包
print("ip layer:"+eth.data.__class__.__name__) #以太包的数据既是网络层包
print("tcp layer:"+eth.data.data.__class__.__name__) #网络层包的数据既是传输层包
print("http layer:" + eth.data.data.data.__class__.__name__) #传输层包的数据既是应用层包
print('Timestamp: ',str(datetime.datetime.utcfromtimestamp(timestamp))) #打印出包的抓取时间
if not isinstance(eth.data, dpkt.ip.IP):
print('Non IP Packet type not supported %s' % eth.data.__class__.__name__)
continue
ip = eth.data
do_not_fragment =bool(ip.off & dpkt.ip.IP_DF)
more_fragments =bool(ip.off & dpkt.ip.IP_MF)
fragment_offset = ip.off & dpkt.ip.IP_OFFMASK
print('IP: %s -> %s (len=%d ttl=%d DF=%d MF=%d offset=%d)' % (socket.inet_ntoa(ip.src), socket.inet_ntoa(ip.dst), ip.len, ip.ttl, do_not_fragment, more_fragments,fragment_offset))
except:
pass
def main():
f =open('demo.pcap','rb')
pcap = dpkt.pcap.Reader(f)
printPcap(pcap)
if __name__ =='__main__':
main()