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
|
#!/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.util import call
from vyos.xml import defaults
from vyos import ConfigError
from vyos import airbag
airbag.enable()
config_file = r'/run/ddclient/ddclient.conf'
systemd_override = r'/run/systemd/system/ddclient.service.d/override.conf'
# Protocols that require zone
zone_allowed = ['cloudflare', 'godaddy', 'hetzner', 'gandi', 'nfsn']
# Protocols that do not require username
username_unnecessary = ['1984', 'cloudflare', 'cloudns', 'duckdns', 'freemyip', 'hetzner', 'keysystems', 'njalla']
# Protocols that support both IPv4 and IPv6
dualstack_supported = ['cloudflare', 'dyndns2', 'freedns', 'njalla']
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base_level = ['service', 'dns', 'dynamic']
if not conf.exists(base_level):
return None
dyndns = conf.get_config_dict(base_level, key_mangling=('-', '_'), get_first_key=True)
for address in dyndns['address']:
# Apply service specific defaults (stype = ['rfc2136', 'service'])
for svc_type in dyndns['address'][address]:
default_values = defaults(base_level + ['address', svc_type])
for svc_cfg in dyndns['address'][address][svc_type]:
dyndns['address'][address][svc_type][svc_cfg] = dict_merge(
default_values, dyndns['address'][address][svc_type][svc_cfg])
dyndns['config_file'] = config_file
return dyndns
def verify(dyndns):
# bail out early - looks like removal from running config
if not dyndns:
return None
for address in dyndns['address']:
# RFC2136 - configuration validation
if 'rfc2136' in dyndns['address'][address]:
for config in dyndns['address'][address]['rfc2136'].values():
for field in ['host_name', 'zone', 'server', 'key']:
if field not in config:
raise ConfigError(f'"{field.replace("_", "-")}" is required for RFC2136 '
f'based Dynamic DNS service on "{address}"')
# Dynamic DNS service provider - configuration validation
if 'service' in dyndns['address'][address]:
for service, config in dyndns['address'][address]['service'].items():
error_msg = f'is required for Dynamic DNS service "{service}" on "{address}"'
for field in ['host_name', 'password', 'protocol']:
if field not in config:
raise ConfigError(f'"{field.replace("_", "-")}" {error_msg}')
if config['protocol'] in zone_allowed and 'zone' not in config:
raise ConfigError(f'"zone" {error_msg}')
if config['protocol'] not in zone_allowed and 'zone' in config:
raise ConfigError(f'"{config["protocol"]}" does not support "zone"')
if config['protocol'] not in username_unnecessary:
if 'username' not in config:
raise ConfigError(f'"username" {error_msg}')
if config['ip_version'] == 'both':
if config['protocol'] not in dualstack_supported:
raise ConfigError(f'"{config["protocol"]}" does not support IPv4 and IPv6 at the same time')
# dyndns2 protocol in ddclient honors dual stack only for dyn.com (dyndns.org)
if config['protocol'] == 'dyndns2' and 'server' in config and config['server'] != 'members.dyndns.org':
raise ConfigError(f'"{config["protocol"]}" for "{config["server"]}" does not support IPv4 and IPv6 at the same time')
return None
def generate(dyndns):
# bail out early - looks like removal from running config
if not dyndns:
return None
render(config_file, 'dns-dynamic/ddclient.conf.j2', dyndns)
render(systemd_override, 'dns-dynamic/override.conf.j2', dyndns)
return None
def apply(dyndns):
if not dyndns:
call('systemctl stop ddclient.service')
if os.path.exists(config_file):
os.unlink(config_file)
else:
call('systemctl restart ddclient.service')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
