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
|
#!/usr/bin/env python3
#
# Copyright (C) 2019-2021 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 copy import deepcopy
from netifaces import interfaces
from vyos.config import Config
from vyos.configdict import get_interface_dict
from vyos.configdict import is_node_changed
from vyos.configdict import get_pppoe_interfaces
from vyos.configverify import verify_authentication
from vyos.configverify import verify_source_interface
from vyos.configverify import verify_interface_exists
from vyos.configverify import verify_vrf
from vyos.configverify import verify_mtu_ipv6
from vyos.configverify import verify_mirror_redirect
from vyos.ifconfig import PPPoEIf
from vyos.template import render
from vyos.util import call
from vyos.util import is_systemd_service_running
from vyos import ConfigError
from vyos import airbag
airbag.enable()
def get_config(config=None):
"""
Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
interface name will be added or a deleted flag
"""
if config:
conf = config
else:
conf = Config()
base = ['interfaces', 'pppoe']
ifname, pppoe = get_interface_dict(conf, base)
# We should only terminate the PPPoE session if critical parameters change.
# All parameters that can be changed on-the-fly (like interface description)
# should not lead to a reconnect!
for options in ['access-concentrator', 'connect-on-demand', 'service-name',
'source-interface', 'vrf', 'no-default-route', 'authentication']:
if is_node_changed(conf, base + [ifname, options]):
pppoe.update({'shutdown_required': {}})
# bail out early - no need to further process other nodes
break
return pppoe
def verify(pppoe):
if 'deleted' in pppoe:
# bail out early
return None
verify_source_interface(pppoe)
verify_authentication(pppoe)
verify_vrf(pppoe)
verify_mtu_ipv6(pppoe)
verify_mirror_redirect(pppoe)
if {'connect_on_demand', 'vrf'} <= set(pppoe):
raise ConfigError('On-demand dialing and VRF can not be used at the same time')
return None
def generate(pppoe):
# set up configuration file path variables where our templates will be
# rendered into
ifname = pppoe['ifname']
config_pppoe = f'/etc/ppp/peers/{ifname}'
if 'deleted' in pppoe or 'disable' in pppoe:
if os.path.exists(config_pppoe):
os.unlink(config_pppoe)
return None
# Create PPP configuration files
render(config_pppoe, 'pppoe/peer.j2', pppoe, permission=0o640)
return None
def apply(pppoe):
ifname = pppoe['ifname']
if 'deleted' in pppoe or 'disable' in pppoe:
if os.path.isdir(f'/sys/class/net/{ifname}'):
p = PPPoEIf(ifname)
p.remove()
call(f'systemctl stop ppp@{ifname}.service')
return None
# reconnect should only be necessary when certain config options change,
# like ACS name, authentication ... (see get_config() for details)
if ((not is_systemd_service_running(f'ppp@{ifname}.service')) or
'shutdown_required' in pppoe):
# cleanup system (e.g. FRR routes first)
if os.path.isdir(f'/sys/class/net/{ifname}'):
p = PPPoEIf(ifname)
p.remove()
call(f'systemctl restart ppp@{ifname}.service')
# When interface comes "live" a hook is called:
# /etc/ppp/ip-up.d/99-vyos-pppoe-callback
# which triggers PPPoEIf.update()
else:
if os.path.isdir(f'/sys/class/net/{ifname}'):
p = PPPoEIf(ifname)
p.update(pppoe)
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
