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authorsever-sever <v.gletenko@vyos.io>2020-10-23 15:26:41 +0000
committersever-sever <v.gletenko@vyos.io>2020-10-23 15:26:41 +0000
commit51fdb57668073d16f5f4795ab9ebdee5b3b853c2 (patch)
treee9f200d7dc344850f1c9f8ed7fa3e94ce0ed5061 /src/conf_mode/protocols_isis.py
parentc6c8c453076a06188d577730f0ab570e8daef5f2 (diff)
downloadvyos-1x-51fdb57668073d16f5f4795ab9ebdee5b3b853c2.tar.gz
vyos-1x-51fdb57668073d16f5f4795ab9ebdee5b3b853c2.zip
isis: T1316: October steps
Diffstat (limited to 'src/conf_mode/protocols_isis.py')
-rwxr-xr-xsrc/conf_mode/protocols_isis.py137
1 files changed, 137 insertions, 0 deletions
diff --git a/src/conf_mode/protocols_isis.py b/src/conf_mode/protocols_isis.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2017-2020 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/>.
+
+import os
+
+from sys import exit
+
+from vyos.config import Config
+from vyos import ConfigError
+from vyos.util import call
+from vyos.template import render
+from vyos.template import render_to_string
+from vyos import frr
+from vyos import airbag
+from pprint import pprint
+airbag.enable()
+
+config_file = r'/tmp/isis.frr'
+
+default_config_data = {
+ 'interface': ''
+}
+
+def get_config():
+ conf = Config()
+ base = ['protocols', 'isis']
+ isis = conf.get_config_dict(base, key_mangling=('-', '_'))
+ if not conf.exists(base):
+ isis = {}
+
+ pprint(isis)
+ return isis
+
+def verify(isis):
+ # bail out early - looks like removal from running config
+ if not isis:
+ return None
+
+ for proc_id, foo_config in isis['isis'].items():
+
+ # If more then one isis process is defined (Frr only supports one)
+ # http://docs.frrouting.org/en/latest/isisd.html#isis-router
+ if len(isis['isis']) > 1:
+ raise ConfigError('Only one isis process can be definded')
+
+ # If network entity title (net) not defined
+ if not "net" in foo_config:
+ raise ConfigError('Define net format iso is mandatory in \"isis {} net"!'.format(proc_id))
+
+ # If interface not set
+ if not "interface" in foo_config:
+ raise ConfigError('Define interface is mandatory in \"isis {} interface"!'.format(proc_id))
+
+ # If md5 and plaintext-password set at the same time
+ if 'area_password' in foo_config:
+ if "md5" in foo_config['area_password'] and "plaintext_password" in foo_config['area_password']:
+ raise ConfigError('Only one password type should be used in \"isis {} area-password"!'.format(proc_id))
+
+ # If one param from deley set, but not set others
+ if 'spf_delay_ietf' in foo_config:
+ required_timers = ['holddown', 'init_delay', 'long_delay', 'short_delay', 'time_to_learn']
+ exist_timers = []
+ for elm_timer in required_timers:
+ if elm_timer in foo_config['spf_delay_ietf']:
+ exist_timers.append(elm_timer)
+
+ exist_timers = set(required_timers).difference(set(exist_timers))
+ if len(exist_timers) > 0:
+ raise ConfigError('All types of delay must be specified: ' + ', '.join(exist_timers).replace('_', '-'))
+
+ # If Redistribute set, but level don't set
+ if 'redistribute' in foo_config:
+ proc_level = foo_config.get('level','').replace('-','_')
+ for proto, proto_config in foo_config.get('redistribute', {}).get('ipv4', {}).items():
+ if 'level_1' not in proto_config and 'level_2' not in proto_config:
+ raise ConfigError('Redistribute level-1 or level-2 should be specified in \"protocols isis {} redistribute ipv4 {}\"'.format(proc_id, proto))
+ for redistribute_level in proto_config.keys():
+ if proc_level and proc_level != 'level_1_2' and proc_level != redistribute_level:
+ raise ConfigError('\"protocols isis {0} redistribute ipv4 {2} {3}\" cannot be used with \"protocols isis {0} level {1}\"'.format(proc_id, proc_level, proto, redistribute_level))
+
+ return None
+
+def generate(isis):
+ if not isis:
+ isis['new_frr_config'] = ''
+ return None
+
+ # render(config) not needed, its only for debug
+ render(config_file, 'frr/isis.frr.tmpl', isis)
+
+ isis['new_frr_config'] = render_to_string('frr/isis.frr.tmpl', isis)
+
+ return None
+
+def apply(isis):
+
+ # Save original configration prior to starting any commit actions
+ isis['original_config'] = frr.get_configuration(daemon='isisd')
+ isis['modified_config'] = frr.replace_section(isis['original_config'], isis['new_frr_config'], from_re='router isis .*')
+
+ # Debugging
+ print('')
+ print('--------- DEBUGGING ----------')
+ print(f'Existing config:\n{isis["original_config"]}\n\n')
+ print(f'Replacement config:\n{isis["new_frr_config"]}\n\n')
+ print(f'Modified config:\n{isis["modified_config"]}\n\n')
+
+ # Frr Mark configuration will test for syntax errors and exception out if any syntax errors are detected
+ frr.mark_configuration(isis['modified_config'])
+
+ # Commit the resulting new configuration to frr, this will render an frr.CommitError() Exception on fail
+ frr.reload_configuration(isis['modified_config'], daemon='isisd')
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)