#!/usr/bin/env python3
"""Network utils"""
import subprocess
import re
from typing import Optional


def get_ip4() -> str:
    """Get IPv4 address"""
    try:
        ip4 = subprocess.check_output(["ip", "addr", "show", "dev", "eth0"]).decode(
            "utf-8"
        )
        ip4 = re.search(r"inet (\d+\.\d+\.\d+\.\d+)\/\d+", ip4)
    except subprocess.CalledProcessError:
        ip4 = None
    return ip4.group(1) if ip4 else ""


def get_ip6() -> Optional[str]:
    """Get IPv6 address"""
    try:
        ip6 = subprocess.check_output(["ip", "addr", "show", "dev", "eth0"]).decode(
            "utf-8"
        )
        # We ignore link-local addresses
        ip6 = re.search(r"inet6 (?!fe80:\S+)(\S+)\/\d+", ip6)

    except subprocess.CalledProcessError:
        ip6 = None
    return ip6.group(1) if ip6 else None