692 lines
24 KiB
Python
692 lines
24 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2012 OpenStack Foundation.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import netaddr
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import re
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from neutron.common import constants
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from neutron.common import exceptions as q_exc
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import uuidutils
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LOG = logging.getLogger(__name__)
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ATTR_NOT_SPECIFIED = object()
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# Defining a constant to avoid repeating string literal in several modules
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SHARED = 'shared'
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def _verify_dict_keys(expected_keys, target_dict, strict=True):
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"""Allows to verify keys in a dictionary.
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:param expected_keys: A list of keys expected to be present.
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:param target_dict: The dictionary which should be verified.
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:param strict: Specifies whether additional keys are allowed to be present.
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:return: True, if keys in the dictionary correspond to the specification.
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"""
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if not isinstance(target_dict, dict):
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msg = (_("Invalid input. '%(target_dict)s' must be a dictionary "
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"with keys: %(expected_keys)s") %
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{'target_dict': target_dict, 'expected_keys': expected_keys})
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return msg
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expected_keys = set(expected_keys)
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provided_keys = set(target_dict.keys())
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predicate = expected_keys.__eq__ if strict else expected_keys.issubset
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if not predicate(provided_keys):
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msg = (_("Validation of dictionary's keys failed."
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"Expected keys: %(expected_keys)s "
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"Provided keys: %(provided_keys)s") %
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{'expected_keys': expected_keys,
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'provided_keys': provided_keys})
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return msg
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def is_attr_set(attribute):
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return not (attribute is None or attribute is ATTR_NOT_SPECIFIED)
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def _validate_values(data, valid_values=None):
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if data not in valid_values:
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msg = (_("'%(data)s' is not in %(valid_values)s") %
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{'data': data, 'valid_values': valid_values})
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LOG.debug(msg)
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return msg
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def _validate_string(data, max_len=None):
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if not isinstance(data, basestring):
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msg = _("'%s' is not a valid string") % data
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LOG.debug(msg)
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return msg
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if max_len is not None and len(data) > max_len:
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msg = (_("'%(data)s' exceeds maximum length of %(max_len)s") %
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{'data': data, 'max_len': max_len})
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LOG.debug(msg)
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return msg
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def _validate_boolean(data, valid_values=None):
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try:
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convert_to_boolean(data)
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except q_exc.InvalidInput:
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msg = _("'%s' is not a valid boolean value") % data
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LOG.debug(msg)
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return msg
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def _validate_range(data, valid_values=None):
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min_value = valid_values[0]
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max_value = valid_values[1]
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if not min_value <= data <= max_value:
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msg = _("'%(data)s' is not in range %(min_value)s through "
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"%(max_value)s") % {'data': data,
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'min_value': min_value,
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'max_value': max_value}
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LOG.debug(msg)
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return msg
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def _validate_no_whitespace(data):
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"""Validates that input has no whitespace."""
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if len(data.split()) > 1:
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msg = _("'%s' contains whitespace") % data
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LOG.debug(msg)
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raise q_exc.InvalidInput(error_message=msg)
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return data
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def _validate_mac_address(data, valid_values=None):
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try:
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netaddr.EUI(_validate_no_whitespace(data))
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except Exception:
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msg = _("'%s' is not a valid MAC address") % data
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LOG.debug(msg)
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return msg
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def _validate_ip_address(data, valid_values=None):
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try:
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netaddr.IPAddress(_validate_no_whitespace(data))
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except Exception:
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msg = _("'%s' is not a valid IP address") % data
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LOG.debug(msg)
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return msg
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def _validate_ip_pools(data, valid_values=None):
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"""Validate that start and end IP addresses are present.
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In addition to this the IP addresses will also be validated
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"""
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if not isinstance(data, list):
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msg = _("Invalid data format for IP pool: '%s'") % data
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LOG.debug(msg)
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return msg
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expected_keys = ['start', 'end']
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for ip_pool in data:
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msg = _verify_dict_keys(expected_keys, ip_pool)
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if msg:
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LOG.debug(msg)
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return msg
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for k in expected_keys:
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msg = _validate_ip_address(ip_pool[k])
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if msg:
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LOG.debug(msg)
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return msg
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def _validate_fixed_ips(data, valid_values=None):
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if not isinstance(data, list):
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msg = _("Invalid data format for fixed IP: '%s'") % data
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LOG.debug(msg)
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return msg
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ips = []
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for fixed_ip in data:
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if not isinstance(fixed_ip, dict):
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msg = _("Invalid data format for fixed IP: '%s'") % fixed_ip
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LOG.debug(msg)
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return msg
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if 'ip_address' in fixed_ip:
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# Ensure that duplicate entries are not set - just checking IP
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# suffices. Duplicate subnet_id's are legitimate.
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fixed_ip_address = fixed_ip['ip_address']
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if fixed_ip_address in ips:
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msg = _("Duplicate IP address '%s'") % fixed_ip_address
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else:
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msg = _validate_ip_address(fixed_ip_address)
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if msg:
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LOG.debug(msg)
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return msg
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ips.append(fixed_ip_address)
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if 'subnet_id' in fixed_ip:
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msg = _validate_uuid(fixed_ip['subnet_id'])
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if msg:
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LOG.debug(msg)
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return msg
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def _validate_nameservers(data, valid_values=None):
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if not hasattr(data, '__iter__'):
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msg = _("Invalid data format for nameserver: '%s'") % data
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LOG.debug(msg)
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return msg
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ips = []
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for ip in data:
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msg = _validate_ip_address(ip)
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if msg:
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# This may be a hostname
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msg = _validate_regex(ip, HOSTNAME_PATTERN)
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if msg:
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msg = _("'%s' is not a valid nameserver") % ip
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LOG.debug(msg)
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return msg
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if ip in ips:
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msg = _("Duplicate nameserver '%s'") % ip
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LOG.debug(msg)
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return msg
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ips.append(ip)
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def _validate_hostroutes(data, valid_values=None):
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if not isinstance(data, list):
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msg = _("Invalid data format for hostroute: '%s'") % data
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LOG.debug(msg)
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return msg
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expected_keys = ['destination', 'nexthop']
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hostroutes = []
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for hostroute in data:
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msg = _verify_dict_keys(expected_keys, hostroute)
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if msg:
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LOG.debug(msg)
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return msg
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msg = _validate_subnet(hostroute['destination'])
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if msg:
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LOG.debug(msg)
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return msg
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msg = _validate_ip_address(hostroute['nexthop'])
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if msg:
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LOG.debug(msg)
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return msg
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if hostroute in hostroutes:
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msg = _("Duplicate hostroute '%s'") % hostroute
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LOG.debug(msg)
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return msg
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hostroutes.append(hostroute)
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def _validate_ip_address_or_none(data, valid_values=None):
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if data is None:
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return None
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return _validate_ip_address(data, valid_values)
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def _validate_subnet(data, valid_values=None):
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msg = None
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try:
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net = netaddr.IPNetwork(_validate_no_whitespace(data))
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cidr = str(net.cidr)
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if (cidr != data):
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msg = _("'%(data)s' isn't a recognized IP subnet cidr,"
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" '%(cidr)s' is recommended") % {"data": data,
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"cidr": cidr}
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else:
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return
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except Exception:
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msg = _("'%s' is not a valid IP subnet") % data
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if msg:
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LOG.debug(msg)
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return msg
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def _validate_subnet_list(data, valid_values=None):
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if not isinstance(data, list):
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msg = _("'%s' is not a list") % data
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LOG.debug(msg)
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return msg
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if len(set(data)) != len(data):
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msg = _("Duplicate items in the list: '%s'") % ', '.join(data)
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LOG.debug(msg)
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return msg
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for item in data:
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msg = _validate_subnet(item)
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if msg:
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return msg
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def _validate_regex(data, valid_values=None):
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try:
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if re.match(valid_values, data):
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return
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except TypeError:
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pass
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msg = _("'%s' is not a valid input") % data
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LOG.debug(msg)
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return msg
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def _validate_uuid(data, valid_values=None):
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if not uuidutils.is_uuid_like(data):
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msg = _("'%s' is not a valid UUID") % data
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LOG.debug(msg)
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return msg
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def _validate_uuid_or_none(data, valid_values=None):
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if data is not None:
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return _validate_uuid(data)
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def _validate_uuid_list(data, valid_values=None):
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if not isinstance(data, list):
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msg = _("'%s' is not a list") % data
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LOG.debug(msg)
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return msg
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for item in data:
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msg = _validate_uuid(item)
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if msg:
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LOG.debug(msg)
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return msg
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if len(set(data)) != len(data):
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msg = _("Duplicate items in the list: '%s'") % ', '.join(data)
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LOG.debug(msg)
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return msg
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def _validate_dict_item(key, key_validator, data):
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# Find conversion function, if any, and apply it
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conv_func = key_validator.get('convert_to')
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if conv_func:
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data[key] = conv_func(data.get(key))
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# Find validator function
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# TODO(salv-orlando): Structure of dict attributes should be improved
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# to avoid iterating over items
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val_func = val_params = None
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for (k, v) in key_validator.iteritems():
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if k.startswith('type:'):
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# ask forgiveness, not permission
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try:
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val_func = validators[k]
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except KeyError:
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return _("Validator '%s' does not exist.") % k
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val_params = v
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break
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# Process validation
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if val_func:
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return val_func(data.get(key), val_params)
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def _validate_dict(data, key_specs=None):
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if not isinstance(data, dict):
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msg = _("'%s' is not a dictionary") % data
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LOG.debug(msg)
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return msg
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# Do not perform any further validation, if no constraints are supplied
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if not key_specs:
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return
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# Check whether all required keys are present
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required_keys = [key for key, spec in key_specs.iteritems()
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if spec.get('required')]
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if required_keys:
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msg = _verify_dict_keys(required_keys, data, False)
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if msg:
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LOG.debug(msg)
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return msg
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# Perform validation and conversion of all values
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# according to the specifications.
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for key, key_validator in [(k, v) for k, v in key_specs.iteritems()
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if k in data]:
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msg = _validate_dict_item(key, key_validator, data)
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if msg:
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LOG.debug(msg)
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return msg
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def _validate_dict_or_none(data, key_specs=None):
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if data is not None:
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return _validate_dict(data, key_specs)
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def _validate_dict_or_empty(data, key_specs=None):
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if data != {}:
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return _validate_dict(data, key_specs)
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def _validate_dict_or_nodata(data, key_specs=None):
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if data:
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return _validate_dict(data, key_specs)
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def _validate_non_negative(data, valid_values=None):
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try:
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data = int(data)
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except (ValueError, TypeError):
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msg = _("'%s' is not an integer") % data
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LOG.debug(msg)
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return msg
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if data < 0:
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msg = _("'%s' should be non-negative") % data
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LOG.debug(msg)
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return msg
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def convert_to_boolean(data):
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if isinstance(data, basestring):
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val = data.lower()
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if val == "true" or val == "1":
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return True
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if val == "false" or val == "0":
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return False
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elif isinstance(data, bool):
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return data
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elif isinstance(data, int):
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if data == 0:
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return False
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elif data == 1:
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return True
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msg = _("'%s' cannot be converted to boolean") % data
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raise q_exc.InvalidInput(error_message=msg)
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def convert_to_int(data):
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try:
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return int(data)
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except (ValueError, TypeError):
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msg = _("'%s' is not a integer") % data
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raise q_exc.InvalidInput(error_message=msg)
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def convert_kvp_str_to_list(data):
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"""Convert a value of the form 'key=value' to ['key', 'value'].
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:raises: q_exc.InvalidInput if any of the strings are malformed
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(e.g. do not contain a key).
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"""
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kvp = [x.strip() for x in data.split('=', 1)]
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if len(kvp) == 2 and kvp[0]:
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return kvp
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msg = _("'%s' is not of the form <key>=[value]") % data
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raise q_exc.InvalidInput(error_message=msg)
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def convert_kvp_list_to_dict(kvp_list):
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"""Convert a list of 'key=value' strings to a dict.
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:raises: q_exc.InvalidInput if any of the strings are malformed
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(e.g. do not contain a key) or if any
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of the keys appear more than once.
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"""
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if kvp_list == ['True']:
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# No values were provided (i.e. '--flag-name')
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return {}
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kvp_map = {}
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for kvp_str in kvp_list:
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key, value = convert_kvp_str_to_list(kvp_str)
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kvp_map.setdefault(key, set())
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kvp_map[key].add(value)
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return dict((x, list(y)) for x, y in kvp_map.iteritems())
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def convert_none_to_empty_list(value):
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return [] if value is None else value
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def convert_none_to_empty_dict(value):
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return {} if value is None else value
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def convert_to_list(data):
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if data is None:
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return []
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elif hasattr(data, '__iter__'):
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return list(data)
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else:
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return [data]
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HOSTNAME_PATTERN = ("(?=^.{1,254}$)(^(?:(?!\d+\.|-)[a-zA-Z0-9_\-]"
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"{1,63}(?<!-)\.?)+(?:[a-zA-Z]{2,})$)")
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HEX_ELEM = '[0-9A-Fa-f]'
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UUID_PATTERN = '-'.join([HEX_ELEM + '{8}', HEX_ELEM + '{4}',
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HEX_ELEM + '{4}', HEX_ELEM + '{4}',
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HEX_ELEM + '{12}'])
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# Note: In order to ensure that the MAC address is unicast the first byte
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# must be even.
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MAC_PATTERN = "^%s[aceACE02468](:%s{2}){5}$" % (HEX_ELEM, HEX_ELEM)
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# Dictionary that maintains a list of validation functions
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validators = {'type:dict': _validate_dict,
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'type:dict_or_none': _validate_dict_or_none,
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'type:dict_or_empty': _validate_dict_or_empty,
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'type:dict_or_nodata': _validate_dict_or_nodata,
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'type:fixed_ips': _validate_fixed_ips,
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'type:hostroutes': _validate_hostroutes,
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'type:ip_address': _validate_ip_address,
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'type:ip_address_or_none': _validate_ip_address_or_none,
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'type:ip_pools': _validate_ip_pools,
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'type:mac_address': _validate_mac_address,
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'type:nameservers': _validate_nameservers,
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'type:non_negative': _validate_non_negative,
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'type:range': _validate_range,
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'type:regex': _validate_regex,
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'type:string': _validate_string,
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'type:subnet': _validate_subnet,
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'type:subnet_list': _validate_subnet_list,
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'type:uuid': _validate_uuid,
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'type:uuid_or_none': _validate_uuid_or_none,
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'type:uuid_list': _validate_uuid_list,
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'type:values': _validate_values,
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'type:boolean': _validate_boolean}
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# Define constants for base resource name
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NETWORK = 'network'
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NETWORKS = '%ss' % NETWORK
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PORT = 'port'
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PORTS = '%ss' % PORT
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SUBNET = 'subnet'
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SUBNETS = '%ss' % SUBNET
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# Note: a default of ATTR_NOT_SPECIFIED indicates that an
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# attribute is not required, but will be generated by the plugin
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# if it is not specified. Particularly, a value of ATTR_NOT_SPECIFIED
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# is different from an attribute that has been specified with a value of
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# None. For example, if 'gateway_ip' is ommitted in a request to
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# create a subnet, the plugin will receive ATTR_NOT_SPECIFIED
|
|
# and the default gateway_ip will be generated.
|
|
# However, if gateway_ip is specified as None, this means that
|
|
# the subnet does not have a gateway IP.
|
|
# The following is a short reference for understanding attribute info:
|
|
# default: default value of the attribute (if missing, the attribute
|
|
# becomes mandatory.
|
|
# allow_post: the attribute can be used on POST requests.
|
|
# allow_put: the attribute can be used on PUT requests.
|
|
# validate: specifies rules for validating data in the attribute.
|
|
# convert_to: transformation to apply to the value before it is returned
|
|
# is_visible: the attribute is returned in GET responses.
|
|
# required_by_policy: the attribute is required by the policy engine and
|
|
# should therefore be filled by the API layer even if not present in
|
|
# request body.
|
|
# enforce_policy: the attribute is actively part of the policy enforcing
|
|
# mechanism, ie: there might be rules which refer to this attribute.
|
|
|
|
RESOURCE_ATTRIBUTE_MAP = {
|
|
NETWORKS: {
|
|
'id': {'allow_post': False, 'allow_put': False,
|
|
'validate': {'type:uuid': None},
|
|
'is_visible': True,
|
|
'primary_key': True},
|
|
'name': {'allow_post': True, 'allow_put': True,
|
|
'validate': {'type:string': None},
|
|
'default': '', 'is_visible': True},
|
|
'subnets': {'allow_post': False, 'allow_put': False,
|
|
'default': [],
|
|
'is_visible': True},
|
|
'admin_state_up': {'allow_post': True, 'allow_put': True,
|
|
'default': True,
|
|
'convert_to': convert_to_boolean,
|
|
'is_visible': True},
|
|
'status': {'allow_post': False, 'allow_put': False,
|
|
'is_visible': True},
|
|
'tenant_id': {'allow_post': True, 'allow_put': False,
|
|
'validate': {'type:string': None},
|
|
'required_by_policy': True,
|
|
'is_visible': True},
|
|
SHARED: {'allow_post': True,
|
|
'allow_put': True,
|
|
'default': False,
|
|
'convert_to': convert_to_boolean,
|
|
'is_visible': True,
|
|
'required_by_policy': True,
|
|
'enforce_policy': True},
|
|
},
|
|
PORTS: {
|
|
'id': {'allow_post': False, 'allow_put': False,
|
|
'validate': {'type:uuid': None},
|
|
'is_visible': True,
|
|
'primary_key': True},
|
|
'name': {'allow_post': True, 'allow_put': True, 'default': '',
|
|
'validate': {'type:string': None},
|
|
'is_visible': True},
|
|
'network_id': {'allow_post': True, 'allow_put': False,
|
|
'required_by_policy': True,
|
|
'validate': {'type:uuid': None},
|
|
'is_visible': True},
|
|
'admin_state_up': {'allow_post': True, 'allow_put': True,
|
|
'default': True,
|
|
'convert_to': convert_to_boolean,
|
|
'is_visible': True},
|
|
'mac_address': {'allow_post': True, 'allow_put': False,
|
|
'default': ATTR_NOT_SPECIFIED,
|
|
'validate': {'type:mac_address': None},
|
|
'enforce_policy': True,
|
|
'is_visible': True},
|
|
'fixed_ips': {'allow_post': True, 'allow_put': True,
|
|
'default': ATTR_NOT_SPECIFIED,
|
|
'convert_list_to': convert_kvp_list_to_dict,
|
|
'validate': {'type:fixed_ips': None},
|
|
'enforce_policy': True,
|
|
'is_visible': True},
|
|
'device_id': {'allow_post': True, 'allow_put': True,
|
|
'validate': {'type:string': None},
|
|
'default': '',
|
|
'is_visible': True},
|
|
'device_owner': {'allow_post': True, 'allow_put': True,
|
|
'validate': {'type:string': None},
|
|
'default': '',
|
|
'is_visible': True},
|
|
'tenant_id': {'allow_post': True, 'allow_put': False,
|
|
'validate': {'type:string': None},
|
|
'required_by_policy': True,
|
|
'is_visible': True},
|
|
'status': {'allow_post': False, 'allow_put': False,
|
|
'is_visible': True},
|
|
},
|
|
SUBNETS: {
|
|
'id': {'allow_post': False, 'allow_put': False,
|
|
'validate': {'type:uuid': None},
|
|
'is_visible': True,
|
|
'primary_key': True},
|
|
'name': {'allow_post': True, 'allow_put': True, 'default': '',
|
|
'validate': {'type:string': None},
|
|
'is_visible': True},
|
|
'ip_version': {'allow_post': True, 'allow_put': False,
|
|
'convert_to': convert_to_int,
|
|
'validate': {'type:values': [4, 6]},
|
|
'is_visible': True},
|
|
'network_id': {'allow_post': True, 'allow_put': False,
|
|
'required_by_policy': True,
|
|
'validate': {'type:uuid': None},
|
|
'is_visible': True},
|
|
'cidr': {'allow_post': True, 'allow_put': False,
|
|
'validate': {'type:subnet': None},
|
|
'is_visible': True},
|
|
'gateway_ip': {'allow_post': True, 'allow_put': True,
|
|
'default': ATTR_NOT_SPECIFIED,
|
|
'validate': {'type:ip_address_or_none': None},
|
|
'is_visible': True},
|
|
#TODO(salvatore-orlando): Enable PUT on allocation_pools
|
|
'allocation_pools': {'allow_post': True, 'allow_put': False,
|
|
'default': ATTR_NOT_SPECIFIED,
|
|
'validate': {'type:ip_pools': None},
|
|
'is_visible': True},
|
|
'dns_nameservers': {'allow_post': True, 'allow_put': True,
|
|
'convert_to': convert_none_to_empty_list,
|
|
'default': ATTR_NOT_SPECIFIED,
|
|
'validate': {'type:nameservers': None},
|
|
'is_visible': True},
|
|
'host_routes': {'allow_post': True, 'allow_put': True,
|
|
'convert_to': convert_none_to_empty_list,
|
|
'default': ATTR_NOT_SPECIFIED,
|
|
'validate': {'type:hostroutes': None},
|
|
'is_visible': True},
|
|
'tenant_id': {'allow_post': True, 'allow_put': False,
|
|
'validate': {'type:string': None},
|
|
'required_by_policy': True,
|
|
'is_visible': True},
|
|
'enable_dhcp': {'allow_post': True, 'allow_put': True,
|
|
'default': True,
|
|
'convert_to': convert_to_boolean,
|
|
'is_visible': True},
|
|
SHARED: {'allow_post': False,
|
|
'allow_put': False,
|
|
'default': False,
|
|
'convert_to': convert_to_boolean,
|
|
'is_visible': False,
|
|
'required_by_policy': True,
|
|
'enforce_policy': True},
|
|
}
|
|
}
|
|
|
|
# Identify the attribute used by a resource to reference another resource
|
|
|
|
RESOURCE_FOREIGN_KEYS = {
|
|
NETWORKS: 'network_id'
|
|
}
|
|
|
|
PLURALS = {NETWORKS: NETWORK,
|
|
PORTS: PORT,
|
|
SUBNETS: SUBNET,
|
|
'dns_nameservers': 'dns_nameserver',
|
|
'host_routes': 'host_route',
|
|
'allocation_pools': 'allocation_pool',
|
|
'fixed_ips': 'fixed_ip',
|
|
'extensions': 'extension'}
|
|
EXT_NSES = {}
|
|
|
|
|
|
def get_attr_metadata():
|
|
return {'plurals': PLURALS,
|
|
'xmlns': constants.XML_NS_V20,
|
|
constants.EXT_NS: EXT_NSES}
|