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#!/usr/bin/env python3
#
# Copyright (C) 2017-2020 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
import re
from copy import deepcopy
from jinja2 import FileSystemLoader, Environment
from sys import exit
from vyos.config import Config
from vyos.validate import is_addr_assigned,is_loopback_addr
from vyos.defaults import directories as vyos_data_dir
from vyos.version import get_version_data
from vyos import ConfigError
config_file = "/etc/default/lldpd"
vyos_config_file = "/etc/lldpd.d/01-vyos.conf"
base = ['service', 'lldp']
default_config_data = {
"options": '',
"interface_list": '',
"location": ''
}
def get_options(config):
options = {}
config.set_level(base)
options['listen_vlan'] = config.exists('listen-vlan')
options['mgmt_addr'] = []
for addr in config.return_values('management-address'):
if is_addr_assigned(addr) and not is_loopback_addr(addr):
options['mgmt_addr'].append(addr)
else:
message = 'WARNING: LLDP management address {0} invalid - '.format(addr)
if is_loopback_addr(addr):
message += '(loopback address).'
else:
message += 'address not found.'
print(message)
snmp = config.exists('snmp enable')
options["snmp"] = snmp
if snmp:
config.set_level('')
options["sys_snmp"] = config.exists('service snmp')
config.set_level(base)
config.set_level(base + ['legacy-protocols'])
options['cdp'] = config.exists('cdp')
options['edp'] = config.exists('edp')
options['fdp'] = config.exists('fdp')
options['sonmp'] = config.exists('sonmp')
# start with an unknown version information
version_data = get_version_data()
options['description'] = version_data['version']
options['listen_on'] = []
return options
def get_interface_list(config):
config.set_level(base)
intfs_names = config.list_nodes(['interface'])
if len(intfs_names) < 0:
return 0
interface_list = []
for name in intfs_names:
config.set_level(base + ['interface', name])
disable = config.exists(['disable'])
intf = {
'name': name,
'disable': disable
}
interface_list.append(intf)
return interface_list
def get_location_intf(config, name):
path = base + ['interface', name]
config.set_level(path)
config.set_level(path + ['location'])
elin = ''
coordinate_based = {}
if config.exists('elin'):
elin = config.return_value('elin')
if config.exists('coordinate-based'):
config.set_level(path + ['location', 'coordinate-based'])
coordinate_based['latitude'] = config.return_value(['latitude'])
coordinate_based['longitude'] = config.return_value(['longitude'])
coordinate_based['altitude'] = '0'
if config.exists(['altitude']):
coordinate_based['altitude'] = config.return_value(['altitude'])
coordinate_based['datum'] = 'WGS84'
if config.exists(['datum']):
coordinate_based['datum'] = config.return_value(['datum'])
intf = {
'name': name,
'elin': elin,
'coordinate_based': coordinate_based
}
return intf
def get_location(config):
config.set_level(base)
intfs_names = config.list_nodes(['interface'])
if len(intfs_names) < 0:
return 0
if config.exists('disable'):
return 0
intfs_location = []
for name in intfs_names:
intf = get_location_intf(config, name)
intfs_location.append(intf)
return intfs_location
def get_config():
lldp = deepcopy(default_config_data)
conf = Config()
if not conf.exists(base):
return None
else:
lldp['options'] = get_options(conf)
lldp['interface_list'] = get_interface_list(conf)
lldp['location'] = get_location(conf)
return lldp
def verify(lldp):
# bail out early - looks like removal from running config
if lldp is None:
return
# check location
for location in lldp['location']:
# check coordinate-based
if len(location['coordinate_based']) > 0:
# check longitude and latitude
if not location['coordinate_based']['longitude']:
raise ConfigError('Must define longitude for interface {0}'.format(location['name']))
if not location['coordinate_based']['latitude']:
raise ConfigError('Must define latitude for interface {0}'.format(location['name']))
if not re.match(r'^(\d+)(\.\d+)?[nNsS]$', location['coordinate_based']['latitude']):
raise ConfigError('Invalid location for interface {0}:\n' \
'latitude should be a number followed by S or N'.format(location['name']))
if not re.match(r'^(\d+)(\.\d+)?[eEwW]$', location['coordinate_based']['longitude']):
raise ConfigError('Invalid location for interface {0}:\n' \
'longitude should be a number followed by E or W'.format(location['name']))
# check altitude and datum if exist
if location['coordinate_based']['altitude']:
if not re.match(r'^[-+0-9\.]+$', location['coordinate_based']['altitude']):
raise ConfigError('Invalid location for interface {0}:\n' \
'altitude should be a positive or negative number'.format(location['name']))
if location['coordinate_based']['datum']:
if not re.match(r'^(WGS84|NAD83|MLLW)$', location['coordinate_based']['datum']):
raise ConfigError("Invalid location for interface {0}:\n' \
'datum should be WGS84, NAD83, or MLLW".format(location['name']))
# check elin
elif location['elin']:
if not re.match(r'^[0-9]{10,25}$', location['elin']):
raise ConfigError('Invalid location for interface {0}:\n' \
'ELIN number must be between 10-25 numbers'.format(location['name']))
# check options
if lldp['options']['snmp']:
if not lldp['options']['sys_snmp']:
raise ConfigError('SNMP must be configured to enable LLDP SNMP')
def generate(lldp):
# bail out early - looks like removal from running config
if lldp is None:
return
# Prepare Jinja2 template loader from files
tmpl_path = os.path.join(vyos_data_dir['data'], 'templates', 'lldp')
fs_loader = FileSystemLoader(tmpl_path)
env = Environment(loader=fs_loader)
# generate listen on interfaces
for intf in lldp['interface_list']:
tmp = ''
# add exclamation mark if interface is disabled
if intf['disable']:
tmp = '!'
tmp += intf['name']
lldp['options']['listen_on'].append(tmp)
# generate /etc/default/lldpd
tmpl = env.get_template('lldpd.tmpl')
config_text = tmpl.render(lldp)
with open(config_file, 'w') as f:
f.write(config_text)
# generate /etc/lldpd.d/01-vyos.conf
tmpl = env.get_template('vyos.conf.tmpl')
config_text = tmpl.render(lldp)
with open(vyos_config_file, 'w') as f:
f.write(config_text)
def apply(lldp):
if lldp:
# start/restart lldp service
os.system('sudo systemctl restart lldpd.service')
else:
# LLDP service has been terminated
os.system('sudo systemctl stop lldpd.service')
os.unlink(config_file)
os.unlink(vyos_config_file)
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
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