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     #€ЖН„e¦ВчБЛ ?ч     ## Copyright (C) 2017 Canonical Ltd.
#
# Author: Ryan Harper <ryan.harper@canonical.com>
#
# This file is part of cloud-init. See LICENSE file for license information.

import copy
import functools
import logging
import socket
import struct

import six

from cloudinit import safeyaml
from cloudinit import util

LOG = logging.getLogger(__name__)

NETWORK_STATE_VERSION = 1
IPV6_DYNAMIC_TYPES = ['dhcp6',
                      'ipv6_slaac',
                      'ipv6_dhcpv6-stateless',
                      'ipv6_dhcpv6-stateful']
NETWORK_STATE_REQUIRED_KEYS = {
    1: ['version', 'config', 'network_state'],
}
NETWORK_V2_KEY_FILTER = [
    'addresses', 'dhcp4', 'dhcp4-overrides', 'dhcp6', 'dhcp6-overrides',
    'gateway4', 'gateway6', 'interfaces', 'match', 'mtu', 'nameservers',
    'renderer', 'set-name', 'wakeonlan', 'accept-ra'
]

NET_CONFIG_TO_V2 = {
    'bond': {'bond-ad-select': 'ad-select',
             'bond-arp-interval': 'arp-interval',
             'bond-arp-ip-target': 'arp-ip-target',
             'bond-arp-validate': 'arp-validate',
             'bond-downdelay': 'down-delay',
             'bond-fail-over-mac': 'fail-over-mac-policy',
             'bond-lacp-rate': 'lacp-rate',
             'bond-miimon': 'mii-monitor-interval',
             'bond-min-links': 'min-links',
             'bond-mode': 'mode',
             'bond-num-grat-arp': 'gratuitious-arp',
             'bond-primary': 'primary',
             'bond-primary-reselect': 'primary-reselect-policy',
             'bond-updelay': 'up-delay',
             'bond-xmit-hash-policy': 'transmit-hash-policy'},
    'bridge': {'bridge_ageing': 'ageing-time',
               'bridge_bridgeprio': 'priority',
               'bridge_fd': 'forward-delay',
               'bridge_gcint': None,
               'bridge_hello': 'hello-time',
               'bridge_maxage': 'max-age',
               'bridge_maxwait': None,
               'bridge_pathcost': 'path-cost',
               'bridge_portprio': 'port-priority',
               'bridge_stp': 'stp',
               'bridge_waitport': None}}


def parse_net_config_data(net_config, skip_broken=True):
    """Parses the config, returns NetworkState object

    :param net_config: curtin network config dict
    """
    state = None
    version = net_config.get('version')
    config = net_config.get('config')
    if version == 2:
        # v2 does not have explicit 'config' key so we
        # pass the whole net-config as-is
        config = net_config

    if version and config is not None:
        nsi = NetworkStateInterpreter(version=version, config=config)
        nsi.parse_config(skip_broken=skip_broken)
        state = nsi.get_network_state()

    return state


def parse_net_config(path, skip_broken=True):
    """Parses a curtin network configuration file and
       return network state"""
    ns = None
    net_config = util.read_conf(path)
    if 'network' in net_config:
        ns = parse_net_config_data(net_config.get('network'),
                                   skip_broken=skip_broken)
    return ns


def from_state_file(state_file):
    state = util.read_conf(state_file)
    nsi = NetworkStateInterpreter()
    nsi.load(state)
    return nsi


def diff_keys(expected, actual):
    missing = set(expected)
    for key in actual:
        missing.discard(key)
    return missing


class InvalidCommand(Exception):
    pass


def ensure_command_keys(required_keys):

    def wrapper(func):

        @functools.wraps(func)
        def decorator(self, command, *args, **kwargs):
            if required_keys:
                missing_keys = diff_keys(required_keys, command)
                if missing_keys:
                    raise InvalidCommand("Command missing %s of required"
                                         " keys %s" % (missing_keys,
                                                       required_keys))
            return func(self, command, *args, **kwargs)

        return decorator

    return wrapper


class CommandHandlerMeta(type):
    """Metaclass that dynamically creates a 'com