Get MAC addresses using a variety of Python packages.

mac_addrs.py

# **************************************
# ** 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)
# ********************************************

The if WINDOWS: isn't required for iface. on Scapy. get_if_hwaddr works as well.

The if WINDOWS: isn't required for iface. on Scapy. get_if_hwaddr works as well.

@gpotter2 Thanks for the suggestion! What version of scapy was that added in? This gist is pretty old and definitely should be updated.

Also, thanks for all of your excellent work on Scapy! I've been using Scapy for many years now and it's easily in top 5 Python libraries I've ever used in terms of design, ease of use, and how well it's maintained.

Thanks. Unfortunately I have no idea about the version ^^'