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dpkt_packet.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Author: Xiaokang Yin
# @Date: 2017-05-25 14:22:34
# @Last Modified by: xiaokang
# @Last Modified time: 2017-07-03 15:25:28
import dpkt
import datetime
import socket
import win_inet_pton
from dpkt.compat import compat_ord
def mac_addr(addr):
"""
Convert a MAC address to a readable/printable string
"""
return '-'.join('%02x' % compat_ord(b) for b in addr)
def inet_to_str(inet):
"""
Convert inet object to a string
"""
# First try ipv4 and then ipv6
try:
return socket.inet_ntop(socket.AF_INET, inet) #if error please install win_inet_pton// pip install win_inet_pton
except ValueError:
return socket.inet_ntop(socket.AF_INET6, inet)
def print_eth(eth):
"""
print the ethernet header
"""
print 'Ethernet Frame:'
print 'src: %s\tdst: %s'%(mac_addr(eth.src),mac_addr(eth.dst))
if (eth.type == 0x800):
print 'Type: IP'
elif (eth.type == 0x806):
print 'Type: ARP'
else:
print 'Type:Unknown'
print
def print_arp(arp):
"""
print the arp information
"""
print 'ARP:'
print 'Hardware type:0x%x\tProtocol type:0x%x' %(arp.hrd,arp.pro)
print 'Hardware addr length:0x%x bytes\tProtocal addr length:0x%x bytes\t Operation code:0x%x' %(arp.hln,arp.pln,arp.op)
print 'Hardware src:%s\tProtocal src:%s'%(mac_addr(arp.sha),inet_to_str(arp.spa))
print 'Hardware dst:%s\tProtocal dst:%s'%(mac_addr(arp.tha),inet_to_str(arp.tpa))
print
def print_dns(dns):
"""
print the dns information
"""
#TODO.
def print_ip(ip):
"""
print the ip header
"""
print("IP:")
print 'version: %d header length: %d(*4 bytes) Service type:0x%x\tTotal length:%d' %(ip.v,ip.hl,ip.tos,ip.len)
print 'Identifier:0x%x\tFlag:0x%x\tOffset:0x%x'%(ip.id,ip.df,ip.offset)
print 'TTL:%d\tProtocol:0x%x\tChecksum:0x%x'%(ip.ttl,ip.p,ip.sum)
print 'Src:%s\tDst:%s' %(inet_to_str(ip.src),inet_to_str(ip.dst))
print
def print_tcp(tcp):
"""
print the tcp header
"""
print 'TCP:'
print 'Source port:%d\tDestination port:%d' %(tcp.sport,tcp.dport)
print 'Sequnce number:%d' %(tcp.seq)
print 'ACK number:%d' %(tcp.ack)
print 'Windows size:%d' %(tcp.win)
print 'Checksum:%d\tUrgent pointer:0x%x' %(tcp.sum, tcp.urp)
print
def print_udp(udp):
"""
print the upd header
"""
print 'UDP:'
print 'Source port:%d\tDestination port:%d' %(udp.sport,udp.dport)
print 'Checksum:0x%x' %(udp.sum)
print 'length: %d' %(udp.ulen)
print
def print_http(http):
"""
print the http header
"""
try:
request = dpkt.http.Request(http)
#http = dpkt.http(tcp.data)
except (dpkt.dpkt.NeedData, dpkt.dpkt.UnpackError):
return
print 'HTTP request:\n %s\n' % repr(request)
print
print
def print_tls(tcp):
"""
print the ssl/tsl information
"""
try:
tls = dpkt.ssl.TLS(tcp.data)
except dpkt.NeedData:
return 'UNKNOWN'
if tls.version in (dpkt.ssl.SSL3_V, dpkt.ssl.TLS1_V,dpkt.ssl.TLS11_V,dpkt.ssl.TLS12_V):
print '########################'
if tls.version == dpkt.ssl.SSL3_V:
sslversion = 'SSL3_V'
elif tls.version == dpkt.ssl.TLS1_V:
sslversion = 'TLS1_V'
elif tls.version == dpkt.ssl.TLS11_V:
sslversion = 'TLS11_V'
elif tls.version == dpkt.ssl.TLS12_V:
sslversion = 'TLS12_V'
print 'ssl/TSL version:%s'% sslversion
print 'HTTPS'
print 'Length:%d\t Type:0x%x'%(tls.len,tls.type)
print
def print_icmp(icmp):
"""
print the icmp header
"""
print('ICMP:')
print ('type:%d code:%d checksum:%d data: %s\n' % (icmp.type, icmp.code, icmp.sum, repr(icmp.data)))
print
def resolve_packet(pcap):
"""
print out the TCP/IP header
"""
for timestamp, buf in pcap:
#ethernet fram (mac src/dst, ethertype)
print '************************************************'
print'Timestamp: %s'% str(datetime.datetime.utcfromtimestamp(timestamp))
eth = dpkt.ethernet.Ethernet(buf)
print_eth(eth)
# Make sure the Ethernet data contains an IP packet
if isinstance(eth.data, dpkt.ip.IP):
ip = eth.data
print_ip(ip)
# TCP in the transport layer
if isinstance(ip.data, dpkt.tcp.TCP):
tcp = ip.data
print_tcp(tcp)
#http
print_http(tcp.data)
print_tls(tcp)
if isinstance(ip.data, dpkt.icmp.ICMP):
icmp = ip.data
print_icmp(icmp)
if isinstance(ip.data, dpkt.udp.UDP):
udp = ip.data
print_udp(udp)
if isinstance(eth.data, dpkt.arp.ARP):
arp = eth.data
print_arp(arp)
def main():
"""
Open up the pcap file and resolve the pcakets
"""
with open("tls.pcap",'rb') as f: #读取数据包，更改为你需要读取数据包的文件名
pcap = dpkt.pcap.Reader(f)
resolve_packet(pcap)
if __name__ == '__main__':
main()