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-rwxr-xr-xsrc/conf_mode/protocols_pim6.py133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/conf_mode/protocols_pim6.py b/src/conf_mode/protocols_pim6.py
new file mode 100755
index 000000000..2003a1014
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+++ b/src/conf_mode/protocols_pim6.py
@@ -0,0 +1,133 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2023 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/>.
+
+from ipaddress import IPv6Address
+from ipaddress import IPv6Network
+from sys import exit
+
+from vyos.config import Config
+from vyos.config import config_dict_merge
+from vyos.configdict import node_changed
+from vyos.configverify import verify_interface_exists
+from vyos.template import render_to_string
+from vyos import ConfigError
+from vyos import frr
+from vyos import airbag
+airbag.enable()
+
+def get_config(config=None):
+ if config:
+ conf = config
+ else:
+ conf = Config()
+ base = ['protocols', 'pim6']
+ pim6 = conf.get_config_dict(base, key_mangling=('-', '_'),
+ get_first_key=True, with_recursive_defaults=True)
+
+ # FRR has VRF support for different routing daemons. As interfaces belong
+ # to VRFs - or the global VRF, we need to check for changed interfaces so
+ # that they will be properly rendered for the FRR config. Also this eases
+ # removal of interfaces from the running configuration.
+ interfaces_removed = node_changed(conf, base + ['interface'])
+ if interfaces_removed:
+ pim6['interface_removed'] = list(interfaces_removed)
+
+ # Bail out early if configuration tree does no longer exist. this must
+ # be done after retrieving the list of interfaces to be removed.
+ if not conf.exists(base):
+ pim6.update({'deleted' : ''})
+ return pim6
+
+ # We have gathered the dict representation of the CLI, but there are default
+ # options which we need to update into the dictionary retrived.
+ default_values = conf.get_config_defaults(**pim6.kwargs, recursive=True)
+
+ pim6 = config_dict_merge(default_values, pim6)
+ return pim6
+
+def verify(pim6):
+ if not pim6 or 'deleted' in pim6:
+ return
+
+ for interface, interface_config in pim6.get('interface', {}).items():
+ verify_interface_exists(interface)
+ if 'mld' in interface_config:
+ mld = interface_config['mld']
+ for group in mld.get('join', {}).keys():
+ # Validate multicast group address
+ if not IPv6Address(group).is_multicast:
+ raise ConfigError(f"{group} is not a multicast group")
+
+ if 'rp' in pim6:
+ if 'address' not in pim6['rp']:
+ raise ConfigError('PIM6 rendezvous point needs to be defined!')
+
+ # Check unique multicast groups
+ unique = []
+ pim_base_error = 'PIM6 rendezvous point group'
+
+ if {'address', 'prefix-list6'} <= set(pim6['rp']):
+ raise ConfigError(f'{pim_base_error} supports either address or a prefix-list!')
+
+ for address, address_config in pim6['rp']['address'].items():
+ if 'group' not in address_config:
+ raise ConfigError(f'{pim_base_error} should be defined for "{address}"!')
+
+ # Check if it is a multicast group
+ for gr_addr in address_config['group']:
+ if not IPv6Network(gr_addr).is_multicast:
+ raise ConfigError(f'{pim_base_error} "{gr_addr}" is not a multicast group!')
+ if gr_addr in unique:
+ raise ConfigError(f'{pim_base_error} must be unique!')
+ unique.append(gr_addr)
+
+def generate(pim6):
+ if not pim6 or 'deleted' in pim6:
+ return
+ pim6['new_frr_config'] = render_to_string('frr/pim6d.frr.j2', pim6)
+ return None
+
+def apply(pim6):
+ if pim6 is None:
+ return
+
+ pim6_daemon = 'pim6d'
+
+ # Save original configuration prior to starting any commit actions
+ frr_cfg = frr.FRRConfig()
+
+ frr_cfg.load_configuration(pim6_daemon)
+
+ for key in ['interface', 'interface_removed']:
+ if key not in pim6:
+ continue
+ for interface in pim6[key]:
+ frr_cfg.modify_section(f'^interface {interface}', stop_pattern='^exit', remove_stop_mark=True)
+
+ if 'new_frr_config' in pim6:
+ frr_cfg.add_before(frr.default_add_before, pim6['new_frr_config'])
+ frr_cfg.commit_configuration(pim6_daemon)
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)