blob: 07ec1c7a38ae957e3f6954ce2bececfbe3763210 (
plain)
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
|
#!/usr/bin/env python3
#
# Copyright (C) 2018-2020 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
from sys import exit
from vyos.config import Config
from vyos.configdict import dict_merge
from vyos.template import render
from vyos.base import Warning
from vyos.util import call
from vyos.util import dict_search
from vyos.xml import defaults
from vyos import ConfigError
from vyos import airbag
airbag.enable()
config_file = r'/run/dhcp-relay/dhcrelay.conf'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'dhcp-relay']
if not conf.exists(base):
return None
relay = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
# We have gathered the dict representation of the CLI, but there are default
# options which we need to update into the dictionary retrived.
default_values = defaults(base)
relay = dict_merge(default_values, relay)
return relay
def verify(relay):
# bail out early - looks like removal from running config
if not relay:
return None
if 'lo' in (dict_search('interface', relay) or []):
raise ConfigError('DHCP relay does not support the loopback interface.')
if 'server' not in relay :
raise ConfigError('No DHCP relay server(s) configured.\n' \
'At least one DHCP relay server required.')
if 'interface' in relay:
if 'upstream_interface' in relay or 'listen_interface' in relay:
raise ConfigError('<interface> configuration is not compatible with upstream/listen interface')
else:
Warning('<interface> is going to be deprecated.\n' \
'Please use <listen-interface> and <upstream-interface>')
if 'upstream_interface' in relay and 'listen_interface' not in relay:
raise ConfigError('No listen-interface configured')
if 'listen_interface' in relay and 'upstream_interface' not in relay:
raise ConfigError('No upstream-interface configured')
return None
def generate(relay):
# bail out early - looks like removal from running config
if not relay:
return None
render(config_file, 'dhcp-relay/dhcrelay.conf.j2', relay)
return None
def apply(relay):
# bail out early - looks like removal from running config
service_name = 'isc-dhcp-relay.service'
if not relay:
call(f'systemctl stop {service_name}')
if os.path.exists(config_file):
os.unlink(config_file)
return None
call(f'systemctl restart {service_name}')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
