[Python知识库]Python 使用标准库原始socket 生成 pcap 文件

注意事项 :

1.仅限linux/uninx 使用

2.不需要任何第三方库,仅用标准库

3.格式为公开格式,可以whireshark 直接打开

代码如下:

import time,struct


class Pcap:
    def __init__(self, filename, link_type=1):
        self.pcap_file = open(filename, 'wb')
        self.pcap_file.write(struct.pack('@ I H H i I I I', 0xa1b2c3d4, 2, 4, 0, 0, 65535, link_type))

    def write(self, data):
        ts_sec, ts_usec = map(int, str(time.time()).split('.'))
        length = len(data)
        self.pcap_file.write(struct.pack('@ I I I I', ts_sec, ts_usec, length, length))
        self.pcap_file.write(data)

    def close(self):
        self.pcap_file.close()

def main():
    start_time=time.time()
    pcap = Pcap('capture.pcap')
    conn = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.ntohs(3))
    while True:
        raw_data, addr = conn.recvfrom(65535)
        pcap.write(raw_data)
        if time.time()-start_time()>10:break

    pcap.close()
   

关注博主即可阅读全文