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
|
#!/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 sys import argv
from vyos.config import Config
from vyos.configdict import dict_merge
from vyos.configdict import get_dhcp_interfaces
from vyos.configverify import verify_common_route_maps
from vyos.configverify import verify_vrf
from vyos.template import render_to_string
from vyos import ConfigError
from vyos import frr
from vyos import airbag
airbag.enable()
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
vrf = None
if len(argv) > 1:
vrf = argv[1]
base_path = ['protocols', 'static']
# eqivalent of the C foo ? 'a' : 'b' statement
base = vrf and ['vrf', 'name', vrf, 'protocols', 'static'] or base_path
static = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
# Assign the name of our VRF context
if vrf: static['vrf'] = vrf
# We also need some additional information from the config, prefix-lists
# and route-maps for instance. They will be used in verify().
#
# XXX: one MUST always call this without the key_mangling() option! See
# vyos.configverify.verify_common_route_maps() for more information.
tmp = conf.get_config_dict(['policy'])
# Merge policy dict into "regular" config dict
static = dict_merge(tmp, static)
# T3680 - get a list of all interfaces currently configured to use DHCP
tmp = get_dhcp_interfaces(conf, vrf)
if tmp: static['dhcp'] = tmp
return static
def verify(static):
verify_common_route_maps(static)
for route in ['route', 'route6']:
# if there is no route(6) key in the dictionary we can immediately
# bail out early
if route not in static:
continue
# When leaking routes to other VRFs we must ensure that the destination
# VRF exists
for prefix, prefix_options in static[route].items():
# both the interface and next-hop CLI node can have a VRF subnode,
# thus we check this using a for loop
for type in ['interface', 'next_hop']:
if type in prefix_options:
for interface, interface_config in prefix_options[type].items():
verify_vrf(interface_config)
if {'blackhole', 'reject'} <= set(prefix_options):
raise ConfigError(f'Can not use both blackhole and reject for '\
'prefix "{prefix}"!')
return None
def generate(static):
if not static:
return None
static['new_frr_config'] = render_to_string('frr/staticd.frr.tmpl', static)
return None
def apply(static):
static_daemon = 'staticd'
zebra_daemon = 'zebra'
# Save original configuration prior to starting any commit actions
frr_cfg = frr.FRRConfig()
# The route-map used for the FIB (zebra) is part of the zebra daemon
frr_cfg.load_configuration(zebra_daemon)
frr_cfg.modify_section(r'^ip protocol static route-map [-a-zA-Z0-9.]+', '')
frr_cfg.commit_configuration(zebra_daemon)
frr_cfg.load_configuration(static_daemon)
if 'vrf' in static:
vrf = static['vrf']
frr_cfg.modify_section(f'^vrf {vrf}', stop_pattern='^exit', remove_stop_mark=True)
else:
frr_cfg.modify_section(r'^ip route .*')
frr_cfg.modify_section(r'^ipv6 route .*')
if 'new_frr_config' in static:
frr_cfg.add_before(frr.default_add_before, static['new_frr_config'])
frr_cfg.commit_configuration(static_daemon)
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
