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# Copyright 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/>.
# T6747:
# - Migrate static BFD configuration to match FRR possibillities
# - Consolidate static multicast routing configuration under a new node
from vyos.configtree import ConfigTree
static_base = ['protocols', 'static']
def migrate(config: ConfigTree) -> None:
# Check for static route/route6 configuration
for route_route6 in ['route', 'route6']:
route_route6_base = static_base + [route_route6]
if not config.exists(route_route6_base):
continue
for prefix in config.list_nodes(route_route6_base):
next_hop_base = route_route6_base + [prefix, 'next-hop']
if not config.exists(next_hop_base):
continue
for next_hop in config.list_nodes(next_hop_base):
multi_hop_base = next_hop_base + [next_hop, 'bfd', 'multi-hop']
if not config.exists(multi_hop_base):
continue
mh_source_base = multi_hop_base + ['source']
source = None
profile = None
for src_ip in config.list_nodes(mh_source_base):
source = src_ip
if config.exists(mh_source_base + [source, 'profile']):
profile = config.return_value(mh_source_base + [source, 'profile'])
# FRR only supports one source, we will use the first one
break
config.delete(multi_hop_base)
config.set(multi_hop_base + ['source-address'], value=source)
config.set(next_hop_base + [next_hop, 'bfd', 'profile'], value=profile)
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