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# Copyright 2018-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library. If not, see <http://www.gnu.org/licenses/>.
from vyos.configtree import ConfigTree
def migrate_neighbor(config, neighbor_path, neighbor):
if config.exists(neighbor_path):
neighbors = config.list_nodes(neighbor_path)
for neighbor in neighbors:
# Move the valueless options: as-override, next-hop-self, route-reflector-client, route-server-client,
# remove-private-as
for valueless_option in ['as-override', 'nexthop-self', 'route-reflector-client', 'route-server-client',
'remove-private-as']:
if config.exists(neighbor_path + [neighbor, valueless_option]):
config.set(neighbor_path + [neighbor] + af_path + [valueless_option])
config.delete(neighbor_path + [neighbor, valueless_option])
# Move filter options: distribute-list, filter-list, prefix-list, and route-map
# They share the same syntax inside so we can group them
for filter_type in ['distribute-list', 'filter-list', 'prefix-list', 'route-map']:
if config.exists(neighbor_path + [neighbor, filter_type]):
for filter_dir in ['import', 'export']:
if config.exists(neighbor_path + [neighbor, filter_type, filter_dir]):
filter_name = config.return_value(neighbor_path + [neighbor, filter_type, filter_dir])
config.set(neighbor_path + [neighbor] + af_path + [filter_type, filter_dir], value=filter_name)
config.delete(neighbor_path + [neighbor, filter_type])
# Move simple leaf node options: maximum-prefix, unsuppress-map, weight
for leaf_option in ['maximum-prefix', 'unsuppress-map', 'weight']:
if config.exists(neighbor_path + [neighbor, leaf_option]):
if config.exists(neighbor_path + [neighbor, leaf_option]):
leaf_opt_value = config.return_value(neighbor_path + [neighbor, leaf_option])
config.set(neighbor_path + [neighbor] + af_path + [leaf_option], value=leaf_opt_value)
config.delete(neighbor_path + [neighbor, leaf_option])
# The rest is special cases, for better or worse
# Move allowas-in
if config.exists(neighbor_path + [neighbor, 'allowas-in']):
if config.exists(neighbor_path + [neighbor, 'allowas-in', 'number']):
allowas_in = config.return_value(neighbor_path + [neighbor, 'allowas-in', 'number'])
config.set(neighbor_path + [neighbor] + af_path + ['allowas-in', 'number'], value=allowas_in)
config.delete(neighbor_path + [neighbor, 'allowas-in'])
# Move attribute-unchanged options
if config.exists(neighbor_path + [neighbor, 'attribute-unchanged']):
for attr in ['as-path', 'med', 'next-hop']:
if config.exists(neighbor_path + [neighbor, 'attribute-unchanged', attr]):
config.set(neighbor_path + [neighbor] + af_path + ['attribute-unchanged', attr])
config.delete(neighbor_path + [neighbor, 'attribute-unchanged', attr])
config.delete(neighbor_path + [neighbor, 'attribute-unchanged'])
# Move capability options
if config.exists(neighbor_path + [neighbor, 'capability']):
# "capability dynamic" is a peer-global option, we only migrate ORF
if config.exists(neighbor_path + [neighbor, 'capability', 'orf']):
if config.exists(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list']):
for orf in ['send', 'receive']:
if config.exists(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list', orf]):
config.set(neighbor_path + [neighbor] + af_path + ['capability', 'orf', 'prefix-list', orf])
config.delete(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list', orf])
config.delete(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list'])
config.delete(neighbor_path + [neighbor, 'capability', 'orf'])
# Move default-originate
if config.exists(neighbor_path + [neighbor, 'default-originate']):
if config.exists(neighbor_path + [neighbor, 'default-originate', 'route-map']):
route_map = config.return_value(neighbor_path + [neighbor, 'default-originate', 'route-map'])
config.set(neighbor_path + [neighbor] + af_path + ['default-originate', 'route-map'], value=route_map)
else:
# Empty default-originate node is meaningful so we re-create it
config.set(neighbor_path + [neighbor] + af_path + ['default-originate'])
config.delete(neighbor_path + [neighbor, 'default-originate'])
# Move soft-reconfiguration
if config.exists(neighbor_path + [neighbor, 'soft-reconfiguration']):
if config.exists(neighbor_path + [neighbor, 'soft-reconfiguration', 'inbound']):
config.set(neighbor_path + [neighbor] + af_path + ['soft-reconfiguration', 'inbound'])
# Empty soft-reconfiguration is meaningless, so we just remove it
config.delete(neighbor_path + [neighbor, 'soft-reconfiguration'])
# Move disable-send-community
if config.exists(neighbor_path + [neighbor, 'disable-send-community']):
for comm_type in ['standard', 'extended']:
if config.exists(neighbor_path + [neighbor, 'disable-send-community', comm_type]):
config.set(neighbor_path + [neighbor] + af_path + ['disable-send-community', comm_type])
config.delete(neighbor_path + [neighbor, 'disable-send-community', comm_type])
config.delete(neighbor_path + [neighbor, 'disable-send-community'])
def migrate(config: ConfigTree) -> None:
if not config.exists(['protocols', 'bgp']):
# Nothing to do
return
# Just to avoid writing it so many times
af_path = ['address-family', 'ipv4-unicast']
# Check if BGP is actually configured and obtain the ASN
asn_list = config.list_nodes(['protocols', 'bgp'])
if asn_list:
# There's always just one BGP node, if any
asn = asn_list[0]
bgp_path = ['protocols', 'bgp', asn]
else:
# There's actually no BGP, just its empty shell
return
## Move global IPv4-specific BGP options to "address-family ipv4-unicast"
# Move networks
network_path = ['protocols', 'bgp', asn, 'network']
if config.exists(network_path):
config.set(bgp_path + af_path + ['network'])
config.set_tag(bgp_path + af_path + ['network'])
networks = config.list_nodes(network_path)
for network in networks:
config.set(bgp_path + af_path + ['network', network])
if config.exists(network_path + [network, 'route-map']):
route_map = config.return_value(network_path + [network, 'route-map'])
config.set(bgp_path + af_path + ['network', network, 'route-map'], value=route_map)
config.delete(network_path)
# Move aggregate-address statements
aggregate_path = ['protocols', 'bgp', asn, 'aggregate-address']
if config.exists(aggregate_path):
config.set(bgp_path + af_path + ['aggregate-address'])
config.set_tag(bgp_path + af_path + ['aggregate-address'])
aggregates = config.list_nodes(aggregate_path)
for aggregate in aggregates:
config.set(bgp_path + af_path + ['aggregate-address', aggregate])
if config.exists(aggregate_path + [aggregate, 'as-set']):
config.set(bgp_path + af_path + ['aggregate-address', aggregate, 'as-set'])
if config.exists(aggregate_path + [aggregate, 'summary-only']):
config.set(bgp_path + af_path + ['aggregate-address', aggregate, 'summary-only'])
config.delete(aggregate_path)
## Migrate neighbor options
neighbor_path = ['protocols', 'bgp', asn, 'neighbor']
if config.exists(neighbor_path):
neighbors = config.list_nodes(neighbor_path)
for neighbor in neighbors:
migrate_neighbor(config, neighbor_path, neighbor)
peer_group_path = ['protocols', 'bgp', asn, 'peer-group']
if config.exists(peer_group_path):
peer_groups = config.list_nodes(peer_group_path)
for peer_group in peer_groups:
migrate_neighbor(config, peer_group_path, peer_group)
## Migrate redistribute statements
redistribute_path = ['protocols', 'bgp', asn, 'redistribute']
if config.exists(redistribute_path):
config.set(bgp_path + af_path + ['redistribute'])
redistributes = config.list_nodes(redistribute_path)
for redistribute in redistributes:
config.set(bgp_path + af_path + ['redistribute', redistribute])
if config.exists(redistribute_path + [redistribute, 'metric']):
redist_metric = config.return_value(redistribute_path + [redistribute, 'metric'])
config.set(bgp_path + af_path + ['redistribute', redistribute, 'metric'], value=redist_metric)
if config.exists(redistribute_path + [redistribute, 'route-map']):
redist_route_map = config.return_value(redistribute_path + [redistribute, 'route-map'])
config.set(bgp_path + af_path + ['redistribute', redistribute, 'route-map'], value=redist_route_map)
config.delete(redistribute_path)
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