# Copyright 2015 OpenStack Foundation
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# All Rights Reserved.
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#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
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#         http://www.apache.org/licenses/LICENSE-2.0
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#    Unless required by applicable law or agreed to in writing, software
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from oslo_config import cfg

from neutron._i18n import _

DHCP_AGENT_OPTS = [
    cfg.IntOpt('resync_interval', default=5,
               help=_("The DHCP agent will resync its state with Neutron to "
                      "recover from any transient notification or RPC errors. "
                      "The interval is number of seconds between attempts.")),
    cfg.StrOpt('dhcp_driver',
               default='neutron.agent.linux.dhcp.Dnsmasq',
               help=_("The driver used to manage the DHCP server.")),
    cfg.BoolOpt('enable_isolated_metadata', default=False,
                help=_("The DHCP server can assist with providing metadata "
                       "support on isolated networks. Setting this value to "
                       "True will cause the DHCP server to append specific "
                       "host routes to the DHCP request. The metadata service "
                       "will only be activated when the subnet does not "
                       "contain any router port. The guest instance must be "
                       "configured to request host routes via DHCP (Option "
                       "121). This option doesn't have any effect when "
                       "force_metadata is set to True.")),
    cfg.BoolOpt('force_metadata', default=False,
                help=_("In some cases the Neutron router is not present to "
                       "provide the metadata IP but the DHCP server can be "
                       "used to provide this info. Setting this value will "
                       "force the DHCP server to append specific host routes "
                       "to the DHCP request. If this option is set, then the "
                       "metadata service will be activated for all the "
                       "networks.")),
    cfg.BoolOpt('enable_metadata_network', default=False,
                help=_("Allows for serving metadata requests coming from a "
                       "dedicated metadata access network whose CIDR is "
                       "169.254.169.254/16 (or larger prefix), and is "
                       "connected to a Neutron router from which the VMs send "
                       "metadata:1 request. In this case DHCP Option 121 will "
                       "not be injected in VMs, as they will be able to reach "
                       "169.254.169.254 through a router. This option "
                       "requires enable_isolated_metadata = True.")),
    cfg.IntOpt('num_sync_threads', default=4,
               help=_('Number of threads to use during sync process. '
                      'Should not exceed connection pool size configured on '
                      'server.'))
]

DHCP_OPTS = [
    cfg.StrOpt('dhcp_confs',
               default='$state_path/dhcp',
               help=_('Location to store DHCP server config files.')),
    cfg.StrOpt('dhcp_domain',
               default='openstacklocal',
               help=_('Domain to use for building the hostnames. '
                      'This option is deprecated. It has been moved to '
                      'neutron.conf as dns_domain. It will be removed '
                      'in a future release.'),
               deprecated_for_removal=True),
]

DNSMASQ_OPTS = [
    cfg.StrOpt('dnsmasq_config_file',
               default='',
               help=_('Override the default dnsmasq settings '
                      'with this file.')),
    cfg.ListOpt('dnsmasq_dns_servers',
                help=_('Comma-separated list of the DNS servers which will be '
                       'used as forwarders.'),
                deprecated_name='dnsmasq_dns_server'),
    cfg.StrOpt('dnsmasq_base_log_dir',
               help=_("Base log dir for dnsmasq logging. "
                      "The log contains DHCP and DNS log information and "
                      "is useful for debugging issues with either DHCP or "
                      "DNS. If this section is null, disable dnsmasq log.")),
    cfg.BoolOpt('dnsmasq_local_resolv', default=False,
                help=_("Enables the dnsmasq service to provide name "
                       "resolution for instances via DNS resolvers on the "
                       "host running the DHCP agent. Effectively removes the "
                       "'--no-resolv' option from the dnsmasq process "
                       "arguments. Adding custom DNS resolvers to the "
                       "'dnsmasq_dns_servers' option disables this feature.")),
    cfg.IntOpt(
        'dnsmasq_lease_max',
        default=(2 ** 24),
        help=_('Limit number of leases to prevent a denial-of-service.')),
    cfg.BoolOpt('dhcp_broadcast_reply', default=False,
                help=_("Use broadcast in DHCP replies.")),
]
