initial commit

main
yulonger's Desktop 2 years ago
parent 625f08277c
commit 599edea784

@ -0,0 +1,58 @@
from scapy.all import *
from scapy.layers.inet import IP, UDP, TCP
from scapy.layers.l2 import Ether
def cut_packet(pkt):
data = raw(pkt)
if len(pkt) < 100:
pad_len = 100 - len(pkt)
pad = Padding()
pad.load = '\x00' * pad_len
pkt = pkt/pad
if len(pkt) > 100:
return Raw(data[:100])
return pkt
def process():
pkts = rdpcap('vpn_aim_chat1a.pcap')
i = 0
for pkt in pkts:
# 只保留pair
# target_pair = None
# if UDP in pkt:
# target_pair = UDP
# if TCP in pkt:
# target_pair = TCP
# raw_data = pkt[target_pair].payload
# pkt = IP(raw(raw_data))
# print(pkt.summary())
# 这个文件内的数据包没有数据链路层
# pkt[Ether].src = '00:00:00:00:00:00' # 将源MAC地址改为0x00
# pkt[Ether].dst = '00:00:00:00:00:00' # 将目标MAC地址改为0x00
pkt[IP].src = '0.0.0.0' # 将源IP地址改为0x00
pkt[IP].dst = '0.0.0.0' # 将目标IP地址改为0x00
if UDP in pkt:
layer_after = pkt[UDP].payload.copy()
pad = Padding()
pad.load = '\x00' * 12
layer_before = pkt.copy()
layer_before[UDP].remove_payload()
pkt = layer_before / raw(pad) / layer_after
pkt = cut_packet(pkt)
wrpcap('output/packet_{0}.pcap'.format(i), [pkt])
i = i + 1
def read_pkt(filename: str):
pkts = rdpcap(filename)
print(pkts)
# read_pkt("output/packet_1.pcap")
process()

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