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#!/usr/bin/env python3
#
# Copyright (C) 2019-2020 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 jmespath
from sys import exit
from copy import deepcopy
from netifaces import interfaces
from vyos.config import Config
from vyos.configdict import dict_merge
from vyos.configverify import verify_source_interface
from vyos.configverify import verify_vrf
from vyos.template import render
from vyos.util import call
from vyos.xml import defaults
from vyos import ConfigError
from vyos import airbag
airbag.enable()
def get_config():
""" Retrive CLI config as dictionary. Dictionary can never be empty,
as at least the interface name will be added or a deleted flag """
conf = Config()
# determine tagNode instance
if 'VYOS_TAGNODE_VALUE' not in os.environ:
raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified')
# retrieve interface default values
base = ['interfaces', 'pppoe']
default_values = defaults(base)
# PPPoE is "special" the default MTU is 1492 - update accordingly
default_values['mtu'] = '1492'
ifname = os.environ['VYOS_TAGNODE_VALUE']
base = base + [ifname]
pppoe = conf.get_config_dict(base, key_mangling=('-', '_'))
# Check if interface has been removed
if pppoe == {}:
pppoe.update({'deleted' : ''})
# We have gathered the dict representation of the CLI, but there are
# default options which we need to update into the dictionary
# retrived.
pppoe = dict_merge(default_values, pppoe)
# Add interface instance name into dictionary
pppoe.update({'ifname': ifname})
return pppoe
def verify(pppoe):
if 'deleted' in pppoe.keys():
# bail out early
return None
verify_source_interface(pppoe)
verify_vrf(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}'
script_pppoe_pre_up = f'/etc/ppp/ip-pre-up.d/1000-vyos-pppoe-{ifname}'
script_pppoe_ip_up = f'/etc/ppp/ip-up.d/1000-vyos-pppoe-{ifname}'
script_pppoe_ip_down = f'/etc/ppp/ip-down.d/1000-vyos-pppoe-{ifname}'
script_pppoe_ipv6_up = f'/etc/ppp/ipv6-up.d/1000-vyos-pppoe-{ifname}'
config_wide_dhcp6c = f'/run/dhcp6c/dhcp6c.{ifname}.conf'
config_files = [config_pppoe, script_pppoe_pre_up, script_pppoe_ip_up,
script_pppoe_ip_down, script_pppoe_ipv6_up, config_wide_dhcp6c]
if 'deleted' in pppoe.keys():
# stop DHCPv6-PD client
call(f'systemctl stop dhcp6c@{ifname}.service')
# Hang-up PPPoE connection
call(f'systemctl stop ppp@{ifname}.service')
# Delete PPP configuration files
for file in config_files:
if os.path.exists(file):
os.unlink(file)
return None
# Create PPP configuration files
render(config_pppoe, 'pppoe/peer.tmpl',
pppoe, trim_blocks=True, permission=0o755)
# Create script for ip-pre-up.d
render(script_pppoe_pre_up, 'pppoe/ip-pre-up.script.tmpl',
pppoe, trim_blocks=True, permission=0o755)
# Create script for ip-up.d
render(script_pppoe_ip_up, 'pppoe/ip-up.script.tmpl',
pppoe, trim_blocks=True, permission=0o755)
# Create script for ip-down.d
render(script_pppoe_ip_down, 'pppoe/ip-down.script.tmpl',
pppoe, trim_blocks=True, permission=0o755)
# Create script for ipv6-up.d
render(script_pppoe_ipv6_up, 'pppoe/ipv6-up.script.tmpl',
pppoe, trim_blocks=True, permission=0o755)
tmp = jmespath.search('dhcpv6_options.prefix_delegation.interface', pppoe)
if tmp and len(tmp) > 0:
# ipv6.tmpl relies on ifname - this should be made consitent in the
# future better then double key-ing the same value
render(config_wide_dhcp6c, 'dhcp-client/ipv6_new.tmpl', pppoe, trim_blocks=True)
return None
def apply(pppoe):
if 'deleted' in pppoe.keys():
# bail out early
return None
if 'disable' not in pppoe.keys():
# Dial PPPoE connection
call('systemctl restart ppp@{ifname}.service'.format(**pppoe))
return None
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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