ip.py 文件源码

def is_address_in_network(network, address):
    """
    Determine whether the provided address is within a network range.

    :param network (str): CIDR presentation format. For example,
        '192.168.1.0/24'.
    :param address: An individual IPv4 or IPv6 address without a net
        mask or subnet prefix. For example, '192.168.1.1'.
    :returns boolean: Flag indicating whether address is in network.
    """
    try:
        network = netaddr.IPNetwork(network)
    except (netaddr.core.AddrFormatError, ValueError):
        raise ValueError("Network (%s) is not in CIDR presentation format" %
                         network)

    try:
        address = netaddr.IPAddress(address)
    except (netaddr.core.AddrFormatError, ValueError):
        raise ValueError("Address (%s) is not in correct presentation format" %
                         address)

    if address in network:
        return True
    else:
        return False