我从一本书中复制了这个小代码,该代码应该捕获我所有 WLAN 的流量(IP 标头)。但是我在发射时无法捕捉到任何东西;“socket.recv(..)”时的代码块。如果变量“host”设置为“localhost”并且我从另一个终端 ping 自己(cmd ->“ping localhost”),我只能看到结果。我什至有一个问题......这段代码应该在linux和windows上运行(例如linux不支持协议IPPROTO_IP(我遇到错误),所以它设置了ICMP);为什么只有在机器运行 Windows 时才处理混杂模式?谢谢大家,希望有人可以帮助我
import socket
import os
import struct
from ctypes import *
host = "localhost"
class IP(Structure):
_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_uint),
("dst", c_uint),
]
def __new__(self, socket_buffer=None):
return self.from_buffer_copy(socket_buffer)
def __init__(self, socket_buffer=None):
self.protocol_map = {1 : "ICMP", 6 : "TCP", 17 : "UDP"}
self.src_address = socket.inet_ntoa(struct.pack("<L", self.src))
self.dst_address = socket.inet_ntoa(struct.pack("<L", self.dst))
try:
self.protocol = self.protocol_map[self.protocol_num]
except:
self.protocol = str(self.protocol_num)
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))
print("[*] Starting...")
sniffer.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
if os.name == "nt":
sniffer.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON)
try:
while True:
raw_buffer = sniffer.recvfrom(65565)[0]
ip_header = IP(raw_buffer[0:20])
print(f"Protocol: {ip_header.protocol} {ip_header.src_address} -> {ip_header.dst_address}")
except KeyboardInterrupt:
print("\n[*] Closing.")
if os.name == "nt":
sniffer.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)
except Exception as err:
print(f"\n[*] {err}")
if os.name == "nt":
sniffer.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)