def METHOD_NAME(ip):
    m = PATTERN_IPV4.match(ip)
    sortkey = None
    ip = None
    if m is None:
        m = PATTERN_IPV6.match(ip)
        if m is None:
            m = PATTERN_ONION.match(ip)
            if m is None:
                return None
            else:
                net = 'onion'
                ipstr = sortkey = m.group(1)
                port = int(m.group(2))
        else:
            net = 'ipv6'
            if m.group(1) in ['::']: # Not interested in localhost
                return None
            ipstr = m.group(1)
            sortkey = ipstr # XXX parse IPv6 into number, could use name_to_ipv6 from generate-seeds
            port = int(m.group(2))
    else:
        # Do IPv4 sanity check
        ip = 0
        for i in range(0,4):
            if int(m.group(i+2)) < 0 or int(m.group(i+2)) > 255:
                return None
            ip = ip + (int(m.group(i+2)) << (8*(3-i)))
        if ip == 0:
            return None
        net = 'ipv4'
        sortkey = ip
        ipstr = m.group(1)
        port = int(m.group(6))
    return {
        "net": net,
        "ip": ipstr,
        "port": port,
        "ipnum": ip,
        "sortkey": sortkey
    }