/usr/lib/python2.7/dist-packages/neutron_vpnaas/services/vpn/device_drivers/strongswan_ipsec.py is in python-neutron-vpnaas 2:9.0.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | # Copyright (c) 2015 Canonical, Inc.
# All Rights Reserved.
#
# 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
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
from oslo_config import cfg
from oslo_log import log as logging
from neutron.agent.linux import ip_lib
from neutron.agent.linux import utils
from neutron.plugins.common import constants
from neutron_vpnaas._i18n import _
from neutron_vpnaas.services.vpn.device_drivers import ipsec
LOG = logging.getLogger(__name__)
TEMPLATE_PATH = os.path.dirname(os.path.abspath(__file__))
strongswan_opts = [
cfg.StrOpt(
'ipsec_config_template',
default=os.path.join(
TEMPLATE_PATH,
'template/strongswan/ipsec.conf.template'),
help=_('Template file for ipsec configuration.')),
cfg.StrOpt(
'strongswan_config_template',
default=os.path.join(
TEMPLATE_PATH,
'template/strongswan/strongswan.conf.template'),
help=_('Template file for strongswan configuration.')),
cfg.StrOpt(
'ipsec_secret_template',
default=os.path.join(
TEMPLATE_PATH,
'template/strongswan/ipsec.secret.template'),
help=_('Template file for ipsec secret configuration.')),
cfg.StrOpt(
'default_config_area',
default=os.path.join(
TEMPLATE_PATH,
'/etc/strongswan.d'),
help=_('The area where default StrongSwan configuration '
'files are located.'))
]
cfg.CONF.register_opts(strongswan_opts, 'strongswan')
NS_WRAPPER = 'neutron-vpn-netns-wrapper'
class StrongSwanProcess(ipsec.BaseSwanProcess):
# ROUTED means route created. (only for auto=route mode)
# CONNECTING means route created, connection tunnel is negotiating.
# INSTALLED means route created,
# also connection tunnel installed. (traffic can pass)
DIALECT_MAP = dict(ipsec.BaseSwanProcess.DIALECT_MAP)
STATUS_DICT = {
'ROUTED': constants.DOWN,
'CONNECTING': constants.DOWN,
'INSTALLED': constants.ACTIVE
}
STATUS_RE = '([a-f0-9\-]+).* (ROUTED|CONNECTING|INSTALLED)'
STATUS_NOT_RUNNING_RE = 'Command:.*ipsec.*status.*Exit code: [1|3] '
def __init__(self, conf, process_id, vpnservice, namespace):
self.DIALECT_MAP['v1'] = 'ikev1'
self.DIALECT_MAP['v2'] = 'ikev2'
self.DIALECT_MAP['sha256'] = 'sha256'
self._strongswan_piddir = self._get_strongswan_piddir()
LOG.debug("strongswan piddir is '%s'" % (self._strongswan_piddir))
super(StrongSwanProcess, self).__init__(conf, process_id,
vpnservice, namespace)
def _get_strongswan_piddir(self):
return utils.execute(
cmd=[self.binary, "--piddir"], run_as_root=True).strip()
def _check_status_line(self, line):
"""Parse a line and search for status information.
If a given line contains status information for a connection,
extract the status and mark the connection as ACTIVE or DOWN
according to the STATUS_MAP.
"""
m = self.STATUS_PATTERN.search(line)
if m:
connection_id = m.group(1)
status = self.STATUS_MAP[m.group(2)]
return connection_id, status
return None, None
def _execute(self, cmd, check_exit_code=True, extra_ok_codes=None):
"""Execute command on namespace.
This execute is wrapped by namespace wrapper.
The namespace wrapper will bind /etc/ and /var/run
"""
ip_wrapper = ip_lib.IPWrapper(namespace=self.namespace)
return ip_wrapper.netns.execute(
[NS_WRAPPER,
'--mount_paths=/etc:%s/etc,%s:%s/var/run' % (
self.config_dir, self._strongswan_piddir, self.config_dir),
'--cmd=%s' % ','.join(cmd)],
check_exit_code=check_exit_code,
extra_ok_codes=extra_ok_codes)
def copy_and_overwrite(self, from_path, to_path):
# NOTE(toabctl): the agent may run as non-root user, so rm/copy as root
if os.path.exists(to_path):
utils.execute(
cmd=["rm", "-rf", to_path], run_as_root=True)
utils.execute(
cmd=["cp", "-a", from_path, to_path], run_as_root=True)
def ensure_configs(self):
"""Generate config files which are needed for StrongSwan.
If there is no directory, this function will create
dirs.
"""
self.ensure_config_dir(self.vpnservice)
self.ensure_config_file(
'ipsec.conf',
cfg.CONF.strongswan.ipsec_config_template,
self.vpnservice)
self.ensure_config_file(
'strongswan.conf',
cfg.CONF.strongswan.strongswan_config_template,
self.vpnservice)
self.ensure_config_file(
'ipsec.secrets',
cfg.CONF.strongswan.ipsec_secret_template,
self.vpnservice,
0o600)
self.copy_and_overwrite(cfg.CONF.strongswan.default_config_area,
self._get_config_filename('strongswan.d'))
def get_status(self):
return self._execute([self.binary, 'status'],
extra_ok_codes=[1, 3])
def restart(self):
"""Restart the process."""
self.reload()
def reload(self):
"""Reload the process.
Sends a USR1 signal to ipsec starter which in turn reloads the whole
configuration on the running IKE daemon charon based on the actual
ipsec.conf. Currently established connections are not affected by
configuration changes.
"""
self._execute([self.binary, 'reload'])
def start(self):
"""Start the process for only auto=route mode now.
Note: if there is no namespace yet,
just do nothing, and wait next event.
"""
if not self.namespace:
return
self._execute([self.binary, 'start'])
# initiate ipsec connection
for ipsec_site_conn in self.vpnservice['ipsec_site_connections']:
self._execute([self.binary, 'up', ipsec_site_conn['id']])
def stop(self):
self._execute([self.binary, 'stop'])
self.connection_status = {}
class StrongSwanDriver(ipsec.IPsecDriver):
def create_process(self, process_id, vpnservice, namespace):
return StrongSwanProcess(
self.conf,
process_id,
vpnservice,
namespace)
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