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# Copyright (C) 2025 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/>.
# T7116: Remove unsupported "internet" community following FRR removal
# From
# set policy route-map <name> rule <ord> set community [add | replace] internet
# set policy community-list <name> rule <ord> regex internet
# To
# set policy route-map <name> rule <ord> set community [add | replace] 0:0
# set policy community-list <name> rule <ord> regex _0:0_
# NOTE: In FRR expanded community-lists, without the '_' delimiters, a regex of
# "0:0" will match "65000:0" as well as "0:0". This doesn't line up with what
# we want when replacing "internet".
from vyos.configtree import ConfigTree
rm_base = ['policy', 'route-map']
cl_base = ['policy', 'community-list']
def migrate(config: ConfigTree) -> None:
if config.exists(rm_base):
for policy_name in config.list_nodes(rm_base):
for rule_ord in config.list_nodes(rm_base + [policy_name, 'rule'], path_must_exist=False):
tmp_path = rm_base + [policy_name, 'rule', rule_ord, 'set', 'community']
if config.exists(tmp_path + ['add']) and config.return_value(tmp_path + ['add']) == 'internet':
config.set(tmp_path + ['add'], '0:0')
if config.exists(tmp_path + ['replace']) and config.return_value(tmp_path + ['replace']) == 'internet':
config.set(tmp_path + ['replace'], '0:0')
if config.exists(cl_base):
for policy_name in config.list_nodes(cl_base):
for rule_ord in config.list_nodes(cl_base + [policy_name, 'rule'], path_must_exist=False):
tmp_path = cl_base + [policy_name, 'rule', rule_ord, 'regex']
if config.exists(tmp_path) and config.return_value(tmp_path) == 'internet':
config.set(tmp_path, '_0:0_')
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