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

import os
import pdb
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)

ethernet = bytearray([
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00,    # source
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00,    # destination
                0x86, 0xdd,                            # type (IPv6)
            ]
    )

tun =  os.open("/dev/net/tun", os.O_WRONLY)
ifr = struct.pack('16sH', 'argus0'.encode(), IFF_TUN | IFF_NO_PI)
fcntl.ioctl(tun, TUNSETIFF, ifr)
fcntl.ioctl(tun, TUNSETOWNER, 1000)
os.write(tun, correct_frame)
os.write(tun, incorrect_frame)