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
|
#!/usr/bin/env python3
#
# Copyright (C) 2017-2020 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 node_changed
from vyos import ConfigError
from vyos.util import call
from vyos.template import render
from vyos.template import render_to_string
from vyos import frr
from vyos import airbag
airbag.enable()
config_file = r'/tmp/isis.frr'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['protocols', 'isis']
isis = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
# determine which members have been removed
for instance in isis:
conf.set_level(base + [instance])
tmp = node_changed(conf, ['interface'])
if tmp:
isis[instance].update({'interface_remove': tmp})
return isis
def verify(isis):
# bail out early - looks like removal from running config
if not isis:
return None
for process, isis_config in isis.items():
# If more then one isis process is defined (Frr only supports one)
# http://docs.frrouting.org/en/latest/isisd.html#isis-router
if len(isis) > 1:
raise ConfigError('Only one isis process can be definded')
# If network entity title (net) not defined
if 'net' not in isis_config:
raise ConfigError('ISIS net format iso is mandatory!')
# If interface not set
if 'interface' not in isis_config:
raise ConfigError('ISIS interface is mandatory!')
# If md5 and plaintext-password set at the same time
if 'area_password' in isis_config:
if {'md5', 'plaintext_password'} <= set(isis_config['encryption']):
raise ConfigError('Can not use both md5 and plaintext-password for ISIS area-password!')
# If one param from deley set, but not set others
if 'spf_delay_ietf' in isis_config:
required_timers = ['holddown', 'init_delay', 'long_delay', 'short_delay', 'time_to_learn']
exist_timers = []
for elm_timer in required_timers:
if elm_timer in isis_config['spf_delay_ietf']:
exist_timers.append(elm_timer)
exist_timers = set(required_timers).difference(set(exist_timers))
if len(exist_timers) > 0:
raise ConfigError('All types of delay must be specified: ' + ', '.join(exist_timers).replace('_', '-'))
# If Redistribute set, but level don't set
if 'redistribute' in isis_config:
proc_level = isis_config.get('level','').replace('-','_')
for proto, proto_config in isis_config.get('redistribute', {}).get('ipv4', {}).items():
if 'level_1' not in proto_config and 'level_2' not in proto_config:
raise ConfigError('Redistribute level-1 or level-2 should be specified in \"protocols isis {} redistribute ipv4 {}\"'.format(process, proto))
for redistribute_level in proto_config.keys():
if proc_level and proc_level != 'level_1_2' and proc_level != redistribute_level:
raise ConfigError('\"protocols isis {0} redistribute ipv4 {2} {3}\" cannot be used with \"protocols isis {0} level {1}\"'.format(process, proc_level, proto, redistribute_level))
return None
def generate(isis):
if not isis:
isis['new_frr_config'] = ''
return None
# only one ISIS process is supported, so we can directly send the first key
# of the config dict
process = list(isis.keys())[0]
isis[process]['process'] = process
# render(config) not needed, its only for debug
render(config_file, 'frr/isis.frr.tmpl', isis[process])
isis['new_frr_config'] = render_to_string('frr/isis.frr.tmpl',
isis[process])
return None
def apply(isis):
# Save original configuration prior to starting any commit actions
frr_cfg = {}
frr_cfg['original_config'] = frr.get_configuration(daemon='isisd')
frr_cfg['modified_config'] = frr.replace_section(frr_cfg['original_config'], isis['new_frr_config'], from_re='router isis .*')
# Debugging
print('')
print('--------- DEBUGGING ----------')
print(f'Existing config:\n{frr_cfg["original_config"]}\n\n')
print(f'Replacement config:\n{isis["new_frr_config"]}\n\n')
print(f'Modified config:\n{frr_cfg["modified_config"]}\n\n')
# FRR mark configuration will test for syntax errors and throws an
# exception if any syntax errors is detected
frr.mark_configuration(frr_cfg['modified_config'])
# Commit resulting configuration to FRR, this will throw CommitError
# on failure
frr.reload_configuration(frr_cfg['modified_config'], daemon='isisd')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
