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#!/usr/bin/env python3
#
# Copyright (C) 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/>.
# Migrate IPv6 router advertisments from a nested interface configuration to
# a denested "service router-advert"
import sys
from vyos.configtree import ConfigTree
def copy_rtradv(c, old_base, interface):
base = ['service', 'router-advert', 'interface']
if c.exists(old_base):
if not c.exists(base):
c.set(base)
c.set_tag(base)
# take the old node as a whole and copy it to new new path,
# additional migrations will be done afterwards
new_base = base + [interface]
c.copy(old_base, new_base)
c.delete(old_base)
# cur-hop-limit has been renamed to hop-limit
if c.exists(new_base + ['cur-hop-limit']):
c.rename(new_base + ['cur-hop-limit'], 'hop-limit')
bool_cleanup = ['managed-flag', 'other-config-flag']
for bool in bool_cleanup:
if c.exists(new_base + [bool]):
tmp = c.return_value(new_base + [bool])
c.delete(new_base + [bool])
if tmp == 'true':
c.set(new_base + [bool])
# max/min interval moved to subnode
intervals = ['max-interval', 'min-interval']
for interval in intervals:
if c.exists(new_base + [interval]):
tmp = c.return_value(new_base + [interval])
c.delete(new_base + [interval])
min_max = interval.split('-')[0]
c.set(new_base + ['interval', min_max], value=tmp)
# cleanup boolean nodes in individual prefix
prefix_base = new_base + ['prefix']
if c.exists(prefix_base):
for prefix in config.list_nodes(prefix_base):
if c.exists(prefix_base + [prefix, 'autonomous-flag']):
tmp = c.return_value(prefix_base + [prefix, 'autonomous-flag'])
c.delete(prefix_base + [prefix, 'autonomous-flag'])
if tmp == 'false':
c.set(prefix_base + [prefix, 'no-autonomous-flag'])
if c.exists(prefix_base + [prefix, 'on-link-flag']):
tmp = c.return_value(prefix_base + [prefix, 'on-link-flag'])
c.delete(prefix_base + [prefix, 'on-link-flag'])
if tmp == 'true':
c.set(prefix_base + [prefix, 'on-link-flag'])
# router advertisement can be individually disabled per interface
# the node has been renamed from send-advert {true | false} to no-send-advert
if c.exists(new_base + ['send-advert']):
tmp = c.return_value(new_base + ['send-advert'])
c.delete(new_base + ['send-advert'])
if tmp == 'false':
c.set(new_base + ['no-send-advert'])
# link-mtu advertisement was formerly disabled by setting its value to 0
# ... this makes less sense - if it should not be send, just do not
# configure it
if c.exists(new_base + ['link-mtu']):
tmp = c.return_value(new_base + ['link-mtu'])
if tmp == '0':
c.delete(new_base + ['link-mtu'])
if __name__ == '__main__':
if (len(sys.argv) < 1):
print("Must specify file name!")
exit(1)
file_name = sys.argv[1]
with open(file_name, 'r') as f:
config_file = f.read()
config = ConfigTree(config_file)
# list all individual interface types like dummy, ethernet and so on
for if_type in config.list_nodes(['interfaces']):
base_if_type = ['interfaces', if_type]
# for every individual interface we need to check if there is an
# ipv6 ra configured ... and also for every VIF (VLAN) interface
for intf in config.list_nodes(base_if_type):
old_base = base_if_type + [intf, 'ipv6', 'router-advert']
copy_rtradv(config, old_base, intf)
vif_base = base_if_type + [intf, 'vif']
if config.exists(vif_base):
for vif in config.list_nodes(vif_base):
old_base = vif_base + [vif, 'ipv6', 'router-advert']
vlan_name = f'{intf}.{vif}'
copy_rtradv(config, old_base, vlan_name)
try:
with open(file_name, 'w') as f:
f.write(config.to_string())
except OSError as e:
print("Failed to save the modified config: {}".format(e))
sys.exit(1)
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