165 lines
5.0 KiB
Python
165 lines
5.0 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (c) 2022 Pim van Pelt
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# -*- coding: utf-8 -*-
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from __future__ import (
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absolute_import,
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division,
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print_function,
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)
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import logging
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import ipaddress
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import os.path
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import sys
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try:
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import yamale
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except ImportError:
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print("ERROR: install yamale manually: sudo pip install yamale")
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sys.exit(-2)
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from config.loopback import validate_loopbacks
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from config.bondethernet import validate_bondethernets
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from config.interface import validate_interfaces
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from config.bridgedomain import validate_bridgedomains
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from config.vxlan_tunnel import validate_vxlan_tunnels
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from config.tap import validate_taps
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from yamale.validators import DefaultValidators, Validator
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class IPInterfaceWithPrefixLength(Validator):
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""" Custom IPAddress config - takes IP/prefixlen as input:
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192.0.2.1/29 or 2001:db8::1/64 are correct. The PrefixLength
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is required, and must be a number (0-32 for IPv4 and 0-128 for
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IPv6).
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"""
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tag = 'ip_interface'
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def _is_valid(self, value):
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try:
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network = ipaddress.ip_interface(value)
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except:
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return False
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if not isinstance(value, str):
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return False
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if not '/' in value:
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return False
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e = value.split('/')
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if not len(e) == 2:
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return False
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if not e[1].isnumeric():
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return False
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return True
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class Validator(object):
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def __init__(self, schema):
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self.logger = logging.getLogger('vppcfg.config')
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self.logger.addHandler(logging.NullHandler())
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self.schema = schema
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def validate(self, yaml):
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ret_rv = True
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ret_msgs = []
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if not yaml:
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return ret_rv, ret_msgs
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validators = DefaultValidators.copy()
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validators[IPInterfaceWithPrefixLength.tag] = IPInterfaceWithPrefixLength
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if self.schema:
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fn = self.schema
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self.logger.debug("Validating against --schema %s" % fn)
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elif hasattr(sys, "_MEIPASS"):
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## See vppcfg.spec data_files that includes schema.yaml into the bundle
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self.logger.debug("Validating against built-in schema")
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fn = os.path.join(sys._MEIPASS, "schema.yaml")
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else:
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fn = "./schema.yaml"
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self.logger.debug("Validating against fallthrough default schema %s" % fn)
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if not os.path.isfile(fn):
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self.logger.error("Cannot file schema file: %s" % fn)
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return False, ret_msgs
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try:
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schema = yamale.make_schema(fn, validators=validators)
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data = yamale.make_data(content=str(yaml))
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yamale.validate(schema, data)
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self.logger.debug("Schema correctly validated by yamale")
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except ValueError as e:
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ret_rv = False
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for result in e.results:
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for error in result.errors:
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ret_msgs.extend(['yamale: %s' % error])
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return ret_rv, ret_msgs
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self.logger.debug("Validating Semantics...")
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rv, msgs = validate_bondethernets(yaml)
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if msgs:
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ret_msgs.extend(msgs)
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if not rv:
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ret_rv = False
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rv, msgs = validate_interfaces(yaml)
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if msgs:
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ret_msgs.extend(msgs)
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if not rv:
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ret_rv = False
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rv, msgs = validate_loopbacks(yaml)
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if msgs:
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ret_msgs.extend(msgs)
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if not rv:
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ret_rv = False
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rv, msgs = validate_bridgedomains(yaml)
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if msgs:
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ret_msgs.extend(msgs)
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if not rv:
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ret_rv = False
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rv, msgs = validate_vxlan_tunnels(yaml)
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if msgs:
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ret_msgs.extend(msgs)
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if not rv:
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ret_rv = False
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rv, msgs = validate_taps(yaml)
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if msgs:
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ret_msgs.extend(msgs)
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if not rv:
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ret_rv = False
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if ret_rv:
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self.logger.debug("Semantics correctly validated")
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return ret_rv, ret_msgs
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def valid_config(self, yaml):
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""" Validate the given YAML configuration in 'yaml' against syntax
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validation given in the yamale 'schema', and all semantic configs.
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Returns True if the configuration is valid, False otherwise.
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"""
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rv, msgs = self.validate(yaml)
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if not rv:
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for m in msgs:
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self.logger.error(m)
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return False
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self.logger.info("Configuration validated successfully")
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return True
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