Python 簡單的模擬wireshark抓包工具
混雜模式是指路過目標機器的資料包也包含在內
0埠指系統自動分配
import socket
import os
#The host be listended
host = "192.168.1.100"
#it means windows ,posix stands for Linux
if os.name == "nt":
socket_protocal = socket.IPPROTO_IP
else:
socket_protocal = socket.IPPROTO_ICMP
sniffer = socket.socket(socket.AF_INET ,socket.SOCK_RAW ,socket_protocal)
sniffer.bind((host, 0))
#include the ip header into packet that captured
sniffer.setsockopt(socket.IPPROTO_IP,socket.IP_HDRINCL,1)
#Promiscuous Mode start
if os.name =="nt":
sniffer.ioctl(socket.SIO_RCVALL,socket.RCVALL_ON)
print sniffer.recvfrom(65565)
#Promiscuous Mode end
if os.name =="nt":
sniffer.ioctl(socket.SIO_RCVALL,socket.RCVALL_OFF)
然後解析以上資料包
#!/usr/bin/python
# coding=utf-8
import socket
import os
import struct
from ctypes import *
# 監聽的主機
host = "192.168.1.100"
# IP頭定義
class IP(Structure):
"""docstring for IP"""
_fields_ = [
("ihl", c_ubyte, 4),
("version", c_ubyte, 4),
("tos", c_ubyte),
("len", c_ushort),
("id", c_ushort),
("offset", c_ushort),
("ttl", c_ubyte),
("protocol_num", c_ubyte),
("sum", c_ushort),
("src", c_ulong),
("dst", c_ulong)
]
def __new__(self, socket_buffer=None):
return self.from_buffer_copy(socket_buffer)
def __init__(self, socket_buffer=None):
# 協議欄位與協議名稱對應
self.protocol_map = {1: "ICMP", 6: "TCP", 17: "UDP"}
# 可讀性更強的IP地址
self.src_address = socket.inet_ntoa(struct.pack("<L", self.src))
self.dst_address = socket.inet_ntoa(struct.pack("<L", self.dst))
# 協議型別
try:
self.protocol = self.protocol_map[self.protocol_num]
except:
self.protocol = str(self.protocol_num)
# 下面的程式碼類似於之前的例子
if os.name == "nt":
socket_protocol = socket.IPPROTO_IP
else:
socket_protocol = socket.IPPROTO_ICMP
sniffer = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket_protocol)
sniffer.bind((host, 0))
sniffer.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
if os.name == "nt":
sniffer.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON)
try:
while True:
# 讀取資料包
raw_buffer = sniffer.recvfrom(65565)[0]
# 將緩衝區的前20個位元組按IP頭進行解析
ip_header = IP(raw_buffer[0:20])
# 輸出協議和通訊雙方IP地址
print "Protocol : %s %s -> %s" % (ip_header.protocol, ip_header.src_address, ip_header.dst_address)
# 處理CTRL-C
except KeyboardInterrupt:
# 如果執行在Windows上,關閉混雜模式
if os.name == "nt":
sniffer.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)