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
149
150
151
152
153
154
155
156
|
#!/usr/bin/env python3
#
# Copyright (C) 2019 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 copy import deepcopy
from sys import exit
from netifaces import interfaces
from vyos.ifconfig import DummyIf
from vyos.configdict import list_diff
from vyos.config import Config
from vyos.validate import is_member
from vyos import ConfigError
from vyos import airbag
airbag.enable()
default_config_data = {
'address': [],
'address_remove': [],
'deleted': False,
'description': '',
'disable': False,
'intf': '',
'is_bridge_member': False,
'vrf': ''
}
def get_config():
dummy = deepcopy(default_config_data)
conf = Config()
# determine tagNode instance
if 'VYOS_TAGNODE_VALUE' not in os.environ:
raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified')
dummy['intf'] = os.environ['VYOS_TAGNODE_VALUE']
# check if we are a member of any bridge
dummy['is_bridge_member'] = is_member(conf, dummy['intf'], 'bridge')
# Check if interface has been removed
if not conf.exists('interfaces dummy ' + dummy['intf']):
dummy['deleted'] = True
return dummy
# set new configuration level
conf.set_level('interfaces dummy ' + dummy['intf'])
# retrieve configured interface addresses
if conf.exists('address'):
dummy['address'] = conf.return_values('address')
# retrieve interface description
if conf.exists('description'):
dummy['description'] = conf.return_value('description')
# Disable this interface
if conf.exists('disable'):
dummy['disable'] = True
# Determine interface addresses (currently effective) - to determine which
# address is no longer valid and needs to be removed from the interface
eff_addr = conf.return_effective_values('address')
act_addr = conf.return_values('address')
dummy['address_remove'] = list_diff(eff_addr, act_addr)
# retrieve VRF instance
if conf.exists('vrf'):
dummy['vrf'] = conf.return_value('vrf')
return dummy
def verify(dummy):
if dummy['deleted']:
if dummy['is_bridge_member']:
raise ConfigError((
f'Interface "{dummy["intf"]}" cannot be deleted as it is a '
f'member of bridge "{dummy["is_bridge_member"]}"!'))
return None
if dummy['vrf']:
if dummy['vrf'] not in interfaces():
raise ConfigError(f'VRF "{dummy["vrf"]}" does not exist')
if dummy['is_bridge_member']:
raise ConfigError((
f'Interface "{dummy["intf"]}" cannot be member of VRF '
f'"{dummy["vrf"]}" and bridge "{dummy["is_bridge_member"]}" '
f'at the same time!'))
if dummy['is_bridge_member'] and dummy['address']:
raise ConfigError((
f'Cannot assign address to interface "{dummy["intf"]}" '
f'as it is a member of bridge "{dummy["is_bridge_member"]}"!'))
return None
def generate(dummy):
return None
def apply(dummy):
d = DummyIf(dummy['intf'])
# Remove dummy interface
if dummy['deleted']:
d.remove()
else:
# update interface description used e.g. within SNMP
d.set_alias(dummy['description'])
# Configure interface address(es)
# - not longer required addresses get removed first
# - newly addresses will be added second
for addr in dummy['address_remove']:
d.del_addr(addr)
for addr in dummy['address']:
d.add_addr(addr)
# assign/remove VRF (ONLY when not a member of a bridge,
# otherwise 'nomaster' removes it from it)
if not dummy['is_bridge_member']:
d.set_vrf(dummy['vrf'])
# disable interface on demand
if dummy['disable']:
d.set_admin_state('down')
else:
d.set_admin_state('up')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
