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
|
#!/usr/bin/env python3
#
# Copyright (C) 2020-2024 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 glob import glob
from vyos.config import Config
from vyos.configverify import has_frr_protocol_in_dict
from vyos.frrender import FRRender
from vyos.frrender import get_frrender_dict
from vyos.utils.dict import dict_search
from vyos.utils.file import read_file
from vyos.utils.process import is_systemd_service_running
from vyos.utils.system import sysctl_write
from vyos.configverify import verify_interface_exists
from vyos import ConfigError
from vyos import airbag
airbag.enable()
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
return get_frrender_dict(conf)
def verify(config_dict):
if not has_frr_protocol_in_dict(config_dict, 'mpls'):
return None
mpls = config_dict['mpls']
if 'interface' in mpls:
for interface in mpls['interface']:
verify_interface_exists(mpls, interface)
# Checks to see if LDP is properly configured
if 'ldp' in mpls:
# If router ID not defined
if 'router_id' not in mpls['ldp']:
raise ConfigError('Router ID missing. An LDP router id is mandatory!')
# If interface not set
if 'interface' not in mpls['ldp']:
raise ConfigError('LDP interfaces are missing. An LDP interface is mandatory!')
# If transport addresses are not set
if not dict_search('ldp.discovery.transport_ipv4_address', mpls) and \
not dict_search('ldp.discovery.transport_ipv6_address', mpls):
raise ConfigError('LDP transport address missing!')
return None
def generate(config_dict):
if config_dict and not is_systemd_service_running('vyos-configd.service'):
FRRender().generate(config_dict)
return None
def apply(config_dict):
if config_dict and not is_systemd_service_running('vyos-configd.service'):
FRRender().apply()
if not has_frr_protocol_in_dict(config_dict, 'mpls'):
return None
mpls = config_dict['mpls']
# Set number of entries in the platform label tables
labels = '0'
if 'interface' in mpls:
labels = '1048575'
sysctl_write('net.mpls.platform_labels', labels)
# Check for changes in global MPLS options
if 'parameters' in mpls:
# Choose whether to copy IP TTL to MPLS header TTL
if 'no_propagate_ttl' in mpls['parameters']:
sysctl_write('net.mpls.ip_ttl_propagate', 0)
# Choose whether to limit maximum MPLS header TTL
if 'maximum_ttl' in mpls['parameters']:
ttl = mpls['parameters']['maximum_ttl']
sysctl_write('net.mpls.default_ttl', ttl)
else:
# Set default global MPLS options if not defined.
sysctl_write('net.mpls.ip_ttl_propagate', 1)
sysctl_write('net.mpls.default_ttl', 255)
# Enable and disable MPLS processing on interfaces per configuration
if 'interface' in mpls:
system_interfaces = []
# Populate system interfaces list with local MPLS capable interfaces
for interface in glob('/proc/sys/net/mpls/conf/*'):
system_interfaces.append(os.path.basename(interface))
# This is where the comparison is done on if an interface needs to be enabled/disabled.
for system_interface in system_interfaces:
interface_state = read_file(f'/proc/sys/net/mpls/conf/{system_interface}/input')
if '1' in interface_state:
if system_interface not in mpls['interface']:
system_interface = system_interface.replace('.', '/')
sysctl_write(f'net.mpls.conf.{system_interface}.input', 0)
elif '0' in interface_state:
if system_interface in mpls['interface']:
system_interface = system_interface.replace('.', '/')
sysctl_write(f'net.mpls.conf.{system_interface}.input', 1)
else:
system_interfaces = []
# If MPLS interfaces are not configured, set MPLS processing disabled
for interface in glob('/proc/sys/net/mpls/conf/*'):
system_interfaces.append(os.path.basename(interface))
for system_interface in system_interfaces:
system_interface = system_interface.replace('.', '/')
sysctl_write(f'net.mpls.conf.{system_interface}.input', 0)
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
