Function _default_route_iface

network_diagnostics.py:770–776

Return the interface carrying the IPv4 default route, or None. Used to tell whether this host's internet traffic egresses through a VPN tunnel.

()

    for i, mac, _ in _neigh_entries():
        if i == ip:
            return mac
    return None


def _arp_baseline_load():
    try:
        with open(_ARP_BASELINE_PATH) as f:
            d = json.load(f)
            return d if isinstance(d, dict) else {}
    except (OSError, ValueError):