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flow_pcap.py
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flow_pcap.py
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# -- coding: utf-8 --
"""
Created on Mon Apr 29 2024
@author: RayminQAQ
@Purpose: split pcap into small pieces (seperated by TCP)
"""
import os
import random
from scapy.all import *
def anonymize_ip(ip):
# 將 IP 地址拆分成四個部分
parts = ip.split('.')
# 對每個部分進行隨機化處理
anonymized_parts = [str(random.randint(0, 255)) for _ in range(4)]
# 返回處理後的 IP 地址
return '.'.join(anonymized_parts)
def save_unique_tcp_packets(pcap_file, output_dir):
# Message
print(f"Proccessing directory in {pcap_file}")
# 使用 rdpcap 函數讀取 pcap 文件中的封包
packets = rdpcap(pcap_file)
# 使用集合來存儲已經見過的 TCP 封包摘要
seen_packets = set()
# 遍歷每個封包,過濾重複封包並保存到文件中
for i, packet in enumerate(packets):
if TCP in packet:
# 如果封包摘要已經在集合中,跳過這個封包
if packet.summary() in seen_packets:
continue
# 對源 IP 地址和目的 IP 地址進行亂數處理
packet[IP].src = anonymize_ip(packet[IP].src)
packet[IP].dst = anonymize_ip(packet[IP].dst)
# 將封包摘要添加到已見封包集合中
seen_packets.add(packet.summary())
# 生成儲存文件名,使用時間戳和序號作為文件名的一部分
filename = f"{output_dir}/tcp_packet_{packet.time}_{i}.pcap"
wrpcap(filename, packet)
def createDir(path: str) -> None:
if not os.path.isdir(path):
os.mkdir(path)
return
def main(input_dir: str, output_directory: str) -> None:
createDir(output_directory)
for folder in os.listdir(input_dir):
createDir(f"{output_directory}/{folder}")
for file in os.listdir(f"./{input_dir}/{folder}"):
infile = f"{input_dir}/{folder}/{file}"
outfile = f"{output_directory}/{folder}/{file}"
if outfile.endswith(".pcap"):
outfile = outfile[:-5]
createDir(outfile)
if "pcap" in file: # because the file would contain apiKeys.txt
save_unique_tcp_packets(infile, outfile)
if __name__ == "__main__":
# Modify
input_dir = "./result"
output_directory = "./result_Pcap"
main(input_dir, output_directory)