#!/usr/bin/env python3
# coding: utf-8
# Do ip tuntap add argus0 mode tun user <your_username> to create the tun interface

import struct
import fcntl

TUNSETIFF = 0x400454ca
TUNSETOWNER = TUNSETIFF + 2
IFF_TUN = 0x0001
IFF_TAP = 0x0002
IFF_NO_PI = 0x1000

correct_frame = 'e'.encode()
incorrect_frame = 'é'.encode()
print(incorrect_frame)

with open("/dev/net/tun", "wb", buffering=0) as tun:
    ifr = struct.pack('16sH', 'argus0'.encode(), IFF_TUN | IFF_NO_PI)
    fcntl.ioctl(tun, TUNSETIFF, ifr)
    fcntl.ioctl(tun, TUNSETOWNER, 1000)
    tun.write(correct_frame)
    tun.write(incorrect_frame)