123 lines
3.8 KiB
Python
123 lines
3.8 KiB
Python
# Copyright 2014 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import netaddr
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from oslo.config import cfg
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import six
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from neutron.agent.linux import external_process
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from neutron.agent.linux import utils
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from neutron.common import constants
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from neutron.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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OPTS = [
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cfg.StrOpt('ra_confs',
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default='$state_path/ra',
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help=_('Location to store IPv6 RA config files')),
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]
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cfg.CONF.register_opts(OPTS)
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prefix_fmt = """interface %s
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{
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AdvSendAdvert on;
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MinRtrAdvInterval 3;
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MaxRtrAdvInterval 10;
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prefix %s
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{
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AdvOnLink on;
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AdvAutonomous on;
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};
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};
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"""
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default_fmt = """interface %s
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{
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AdvSendAdvert on;
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MinRtrAdvInterval 3;
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MaxRtrAdvInterval 10;
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};
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"""
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def _is_slaac(ra_mode):
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return (ra_mode == constants.IPV6_SLAAC or
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ra_mode == constants.DHCPV6_STATELESS)
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def _generate_radvd_conf(router_id, router_ports, dev_name_helper):
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radvd_conf = utils.get_conf_file_name(cfg.CONF.ra_confs,
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router_id,
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'radvd.conf',
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True)
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buf = six.StringIO()
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for p in router_ports:
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if netaddr.IPNetwork(p['subnet']['cidr']).version == 6:
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interface_name = dev_name_helper(p['id'])
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if _is_slaac(p['subnet']['ipv6_ra_mode']):
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conf_str = prefix_fmt % (interface_name,
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p['subnet']['cidr'])
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else:
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conf_str = default_fmt % interface_name
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buf.write('%s' % conf_str)
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utils.replace_file(radvd_conf, buf.getvalue())
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return radvd_conf
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def _spawn_radvd(router_id, radvd_conf, router_ns, root_helper):
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def callback(pid_file):
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radvd_cmd = ['radvd',
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'-C', '%s' % radvd_conf,
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'-p', '%s' % pid_file]
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return radvd_cmd
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radvd = external_process.ProcessManager(cfg.CONF,
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router_id,
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root_helper,
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router_ns,
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'radvd')
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radvd.enable(callback, True)
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LOG.debug("radvd enabled for router %s", router_id)
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def enable_ipv6_ra(router_id, router_ns, router_ports,
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dev_name_helper, root_helper):
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for p in router_ports:
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if netaddr.IPNetwork(p['subnet']['cidr']).version == 6:
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break
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else:
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# Kill the daemon if it's running
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disable_ipv6_ra(router_id, router_ns, root_helper)
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return
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LOG.debug("Enable IPv6 RA for router %s", router_id)
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radvd_conf = _generate_radvd_conf(router_id, router_ports, dev_name_helper)
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_spawn_radvd(router_id, radvd_conf, router_ns, root_helper)
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def disable_ipv6_ra(router_id, router_ns, root_helper):
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radvd = external_process.ProcessManager(cfg.CONF,
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router_id,
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root_helper,
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router_ns,
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'radvd')
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radvd.disable()
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utils.remove_conf_files(cfg.CONF.ra_confs, router_id)
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LOG.debug("radvd disabled for router %s", router_id)
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