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
|
#!/usr/bin/env python3
#
# Copyright (C) 2021 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.configverify import verify_route_maps
from vyos.util import call
from vyos.util import dict_search
from vyos.xml import defaults
from vyos.template import render
from vyos.template import render_to_string
from vyos import ConfigError
from vyos import frr
from vyos import airbag
airbag.enable()
config_file = r'/tmp/rip.frr'
frr_daemon = 'ripd'
DEBUG = os.path.exists('/tmp/rip.debug')
if DEBUG:
import logging
lg = logging.getLogger("vyos.frr")
lg.setLevel(logging.DEBUG)
ch = logging.StreamHandler()
lg.addHandler(ch)
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['protocols', 'rip']
rip = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
# Bail out early if configuration tree does not exist
if not conf.exists(base):
return rip
# 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)
# merge in remaining default values
rip = dict_merge(default_values, rip)
# We also need some additional information from the config, prefix-lists
# and route-maps for instance. They will be used in verify()
base = ['policy']
tmp = conf.get_config_dict(base, key_mangling=('-', '_'))
# Merge policy dict into OSPF dict
rip = dict_merge(tmp, rip)
return rip
def verify(rip):
if not rip:
return None
acl_in = dict_search('distribute_list.access_list.in', rip)
if acl_in and acl_in not in (dict_search('policy.access_list', rip) or []):
raise ConfigError(f'Inbound ACL "{acl_in}" does not exist!')
acl_out = dict_search('distribute_list.access_list.out', rip)
if acl_out and acl_out not in (dict_search('policy.access_list', rip) or []):
raise ConfigError(f'Outbound ACL "{acl_out}" does not exist!')
prefix_list_in = dict_search('distribute_list.prefix_list.in', rip)
if prefix_list_in and prefix_list_in.replace('-','_') not in (dict_search('policy.prefix_list', rip) or []):
raise ConfigError(f'Inbound prefix-list "{prefix_list_in}" does not exist!')
prefix_list_out = dict_search('distribute_list.prefix_list.out', rip)
if prefix_list_out and prefix_list_out.replace('-','_') not in (dict_search('policy.prefix_list', rip) or []):
raise ConfigError(f'Outbound prefix-list "{prefix_list_out}" does not exist!')
verify_route_maps(rip)
def generate(rip):
if not rip:
rip['new_frr_config'] = ''
return None
# render(config) not needed, its only for debug
render(config_file, 'frr/rip.frr.tmpl', rip)
rip['new_frr_config'] = render_to_string('frr/rip.frr.tmpl', rip)
return None
def apply(rip):
# Save original configuration prior to starting any commit actions
frr_cfg = frr.FRRConfig()
frr_cfg.load_configuration(frr_daemon)
frr_cfg.modify_section(r'interface \S+', '')
frr_cfg.modify_section('router rip', '')
frr_cfg.add_before(r'(ip prefix-list .*|route-map .*|line vty)', rip['new_frr_config'])
# Debugging
if DEBUG:
from pprint import pprint
print('')
print('--------- DEBUGGING ----------')
pprint(dir(frr_cfg))
print('Existing config:\n')
for line in frr_cfg.original_config:
print(line)
print(f'Replacement config:\n')
print(f'{rip["new_frr_config"]}')
print(f'Modified config:\n')
print(f'{frr_cfg}')
frr_cfg.commit_configuration(frr_daemon)
# If FRR config is blank, rerun the blank commit x times due to frr-reload
# behavior/bug not properly clearing out on one commit.
if rip['new_frr_config'] == '':
for a in range(5):
frr_cfg.commit_configuration(frr_daemon)
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
