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packet_inspector.py
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packet_inspector.py
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import platform
from colorama import init
import datetime
import logging
# for sniffing
import struct
import time
import dpkt
# for running as admin
import ctypes
import sys
import os
from graphics import *
from args import *
from packet import *
from print import *
from interfaces import *
from sniffing_stat import *
def run_as_admin(system) -> None:
'''
Check if admin and run as admin if needed
'''
if system == 'Windows':
try:
if not ctypes.windll.shell32.IsUserAnAdmin():
arguments = ' '.join(['"{}"'.format(arg) for arg in sys.argv])
ctypes.windll.shell32.ShellExecuteW(None, 'runas', sys.executable, arguments, None, 1)
exit(0)
except Exception as ex:
print_color(f'\n[Err] {ex}', 'red')
logging.error(f'[Err] {ex}')
input('\nPress Enter to continue...')
exit(1)
elif system == 'Linux':
if os.getuid() != 0:
print_color('\nPlease re-run the sniffer using sudo', 'red')
exit(0)
def get_unique_filename(filename) -> str:
'''
Get the unique filename
'''
timestamp = datetime.datetime.now().strftime('%d%m%Y')
counter = 1
while os.path.exists('dumps/' + filename):
filename = f'sniffing_{timestamp}({counter}).pcap'
counter += 1
return filename
def create_directory(dirname) -> None:
'''
Create a directory with the specified name
'''
os.makedirs(os.path.dirname(dirname), exist_ok=True)
def start_logging() -> None:
create_directory('logs/')
logging.basicConfig(
level=logging.INFO,
filename=f"logs/sniffer_errors_{datetime.datetime.now().strftime('%d%m%Y')}.log",
filemode='a',
encoding='utf-8'
)
def main():
args = parse_args() # get args and print help for sniffer if necessary
system = platform.system() # we need to run as admin to create sockets
run_as_admin(system)
init() #for colorama
print_logo() # print logo
interfaces = get_interfaces() # get net interfaces
sniffing_stat = SniffingStatistics()
if not args.interactive and not args.interface:
print_color('[Err] You must specify an interface or use interactive mode!', 'red')
input('\nPress Enter to continue...')
exit(0)
if args.interface:
interface = args.interface
protocol = args.protocol
if args.interactive:
interface = choose_interface(interfaces)
print(f"[*] Your choice: {interface['name']}\n")
protocol = choose_protocol()
print(f'[*] Your choice: {protocol}\n')
while True:
try:
sniffer_socket = get_sniffer_socket(system, interface)
break
except Exception as ex:
print_color(f'\n[Err] {ex}\nTry again with another interface!\n', 'red')
logging.error(f'[Err] {ex}')
if args.interactive:
interface = choose_interface(interfaces)
else:
input('\nPress Enter to continue...')
exit(0)
filename = args.save
if filename:
filename += '.pcap'
create_directory('dumps/')
filename = get_unique_filename(filename)
try:
pcap_file = open('dumps/' + filename, 'wb')
logging.info(f'Output file: {filename}')
except IOError:
print_color(f'[Err] Unable to open/create file {filename} in directory dumps', 'red')
input('\nPress Enter to continue...')
exit(0)
pcap_writer = dpkt.pcap.Writer(pcap_file)
if args.ip_address:
print_color(f'\n[*] Provided IP address: {args.ip_address}\n', 'green')
print_color(f"\n[*] Sniffing started on interface {interface['name']}\nTo stop sniffing use Ctrl + c\n", 'green')
time.sleep(0.5) # если большой поток пакетов в самом начале сниффинга будет, то пользователь не увидит как остановить сниффинг
start_time = datetime.datetime.now()
protocol_map = {1:'ICMP', 6:'TCP', 17:'UDP'}
if args.quiet:
sniffing_stat.create_thread().start()
while True:
try:
raw_packet = sniffer_socket.recvfrom(65535)[0]
timestamp = int(datetime.datetime.now().timestamp())
ip_version = struct.unpack('!B', raw_packet[0:20][0:1])[0] >> 4
ip_protocol_num = struct.unpack('!B', raw_packet[0:20][9:10])[0]
filtered_src_ip = None
filtered_dst_ip = None
if args.ip_address != 'ALL' or protocol != 'ALL':
ip_header = raw_packet[0:20]
if args.ip_address != 'ALL':
src_ip = socket.inet_ntoa(ip_header[12:16])
dst_ip = socket.inet_ntoa(ip_header[16:20])
if args.ip_address not in (src_ip, dst_ip):
continue
filtered_src_ip = src_ip
filtered_dst_ip = dst_ip
if protocol != 'ALL':
# get from header version and protocol
try:
if protocol != protocol_map[ip_protocol_num]:
continue
except Exception:
continue
#process the packet
sniffing_stat.packet_count += 1
packet = PacketFactory.create_packet(system, raw_packet, filtered_src_ip, filtered_dst_ip, ip_version, ip_protocol_num, timestamp, args.raw, sniffing_stat.packet_count)
#update stat
if args.graphics:
sniffing_stat.update_activity(packet.src_address, packet.dst_address)
sniffing_stat.update_packets_statistics(packet.protocol)
#print packet's data
if not args.quiet:
if args.header:
packet.print_header()
else:
packet.print_less()
if args.show_payload:
packet.print_payload()
if filename:
pcap_writer.writepkt(packet.get_pcap_packet().pack())
if args.count:
if sniffing_stat.packet_count == args.count:
raise KeyboardInterrupt
except KeyboardInterrupt:
print('\n\nSniffing complete...')
end_time = datetime.datetime.now()
print(f'Total sniffing time: {end_time - start_time}')
print(f'Total packets captured {sniffing_stat.packet_count}')
if system == 'Windows':
sniffer_socket.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)
break
except Exception as ex:
print_color(f'\n[Err] {ex}', 'red')
logging.error(f'[Err] {ex}')
break
sniffing_stat.need_to_print = False
if (args.graphics):
show_statistics(sniffing_stat)
if filename:
print(f'Packets captured into file {filename} in directory dumps')
pcap_file.close()
input('\nPress Enter to continue...')
if __name__ == '__main__':
start_logging()
main()