ipv4.py 文件源码

def str_to_int(addr, flags=0):
    """
    :param addr: An IPv4 dotted decimal address in string form.

    :param flags: decides which rules are applied to the interpretation of the
        addr value. Supported constants are INET_PTON and ZEROFILL. See the
        netaddr.core docs for details.

    :return: The equivalent unsigned integer for a given IPv4 address.
    """
    if flags & ZEROFILL:
        addr = '.'.join(['%d' % int(i) for i in addr.split('.')])

    try:
        if flags & INET_PTON:
            return _struct.unpack('>I', _inet_pton(AF_INET, addr))[0]
        else:
            return _struct.unpack('>I', _inet_aton(addr))[0]
    except Exception:
        raise AddrFormatError('%r is not a valid IPv4 address string!' % addr)