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5476d74f53
On Ubuntu KEA expects this directory to be present, but it is not created automatically. /run is also a tmpfs, so we have to create the directory after each reboot.
119 lines
4.0 KiB
Python
119 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
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# vim:fenc=utf-8
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#
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# Copyright (C) 2020 Freie Universität Berlin
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#
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# This file is subject to the terms and conditions of the GNU Lesser
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# General Public License v2.1. See the file LICENSE in the top level
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# directory for more details.
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import json
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import os
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import tempfile
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import time
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import base
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__author__ = "Martine S. Lenders"
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__copyright__ = "Copyright (C) 2020 Freie Universität Berlin"
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__credits__ = ["Martine S. Lenders"]
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__license__ = "LGPLv2.1"
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__maintainer__ = "Martine S. Lenders"
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__email__ = "m.lenders@fu-berlin.de"
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class KeaConfig(object):
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def __init__(self, interface, prefix, prefix_len, delegated_len=None,
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valid_lifetime=40000, preferred_lifetime=30000,
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renew_timer=10000, rebind_timer=20000):
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if not prefix.endswith("::"):
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raise ValueError("prefix must end with '::'")
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if int(prefix_len) < 1 or int(prefix_len) > 128:
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raise ValueError("prefix_len must be between 1 and 128")
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if int(valid_lifetime) <= 0:
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raise ValueError("valid_lifetime must be greater than 0")
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if int(preferred_lifetime) <= 0:
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raise ValueError("preferred_lifetime must be greater than 0")
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if int(renew_timer) <= 0:
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raise ValueError("renew_timer must be greater than 0")
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if int(rebind_timer) <= 0:
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raise ValueError("rebind_timer must be greater than 0")
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if delegated_len is None:
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delegated_len = prefix_len
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self._config_dict = {
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"Dhcp6": {
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"interfaces-config": {
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"interfaces": [interface]
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},
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"lease-database": {
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"type": "memfile"
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},
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"valid-lifetime": int(valid_lifetime),
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"preferred-lifetime": int(preferred_lifetime),
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"renew-timer": int(renew_timer),
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"rebind-timer": int(rebind_timer),
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"subnet6": [{
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"interface": interface,
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"subnet": "{}/{}".format(prefix, prefix_len),
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"pd-pools": [{
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"prefix": prefix,
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"prefix-len": prefix_len,
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"delegated-len": delegated_len
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}],
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}],
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},
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}
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self.config_file = None
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def __del__(self):
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if self.config_file is not None:
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self.config_file.close()
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def _dump_json(self):
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json.dump(self._config_dict, self.config_file)
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self.config_file.flush()
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def __str__(self):
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if self.config_file is None:
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self.config_file = tempfile.NamedTemporaryFile(mode="w")
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self._dump_json()
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return self.config_file.name
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@property
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def interface(self):
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return self._config_dict["Dhcp6"]["interfaces-config"]["interfaces"][0]
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class KeaServer(base.DHCPv6Server):
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command = ["kea-dhcp6", "-c"]
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package = {
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"generic": {"name": "kea-dhcp6", "url": "https://kea.isc.org/"},
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"Debian": {"name": "kea-dhcp6-server"},
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"Arch": {"name": "kea"},
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}
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def __init__(self, config, next_hop="fe80::2", *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.next_hop = next_hop
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self.config = config
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def pre_run(self):
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# create config file in daemon so it is not automatically deleted
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self.command.append(str(self.config))
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if self.daemonized:
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# need to wait for interface to connect before we can run server
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time.sleep(2)
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def run(self):
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if not self.is_installed():
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self.install()
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if self.installer.os in ["Arch"] and \
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not os.path.exists("/var/run/kea/"):
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# workaround: Arch does not create that directory on first
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# install
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os.makedirs("/var/run/kea/")
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# workaround: Ubuntu does not create that directory automatically
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os.makedirs("/run/kea/", exist_ok=True)
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super().run()
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