# **************************************
# ** Get MAC address of a remote host **
def arpreq_ip(ip):
    # type: (str) -> Optional[str]
    import arpreq
    return arpreq.arpreq('192.168.1.1')

def scapy_ip(ip):
    # type: (str) -> str
    """Requires root permissions on POSIX platforms.
    Windows does not have this limitation."""
    from scapy.layers.l2 import getmacbyip
    return getmacbyip(ip)
# ******************************************


# ******************************************
# ** Get MAC address of a local interface **
def psutil_iface(iface):
    # type: (str) -> Optional[str]
    import psutil
    nics = psutil.net_if_addrs()
    if iface in nics:
        nic = nics[iface]
        for i in nic:
            if i.family == psutil.AF_LINK:
                return i.address

def netifaces_iface(iface):
    # type: (str) -> str
    import netifaces
    return netifaces.ifaddresses(iface)[netifaces.AF_LINK][0]['addr']

def scapy_iface(iface):
    # type: (str) -> str
    # Note: if the interface exists, but has no MAC,
    # get_if_hwaddr will return "00:00:00:00:00:00
    from scapy.layers.l2 import get_if_hwaddr
    return get_if_hwaddr(iface)
# ********************************************


# ********************************************
# Determine the default interface for a system
def netifaces_default_gateway():
    # type: () -> str
    import netifaces
    return list(netifaces.gateways()['default'].values())[0][1]
# ********************************************


# ********************************************
# Old versions of scapy required this on Windows to get a local interface
# (Not sure exact version this was changed, but likely pre-2.6.)
def old_scapy_iface_windows(iface):
    # type: (str) -> str
    from scapy.layers.l2 import get_if_hwaddr
    if WINDOWS:
        from scapy.arch.windows import get_windows_if_list
        interfaces = get_windows_if_list()
        for i in interfaces:
            if any(iface in i[x] for x in
                   ['name', 'netid', 'description', 'win_index']):
                return i['mac']
    # WARNING: Do not put an 'else' here!
    return get_if_hwaddr(iface)
# ********************************************