105 lines
3.3 KiB
Python
105 lines
3.3 KiB
Python
# Copyright 2016 VMware, Inc. 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 re
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from neutron_lib.api import extensions
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from neutron_lib.api import validators
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from neutron_lib import constants
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from neutron_lib.db import constants as db_const
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from vmware_nsx._i18n import _
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DNS_LABEL_MAX_LEN = 63
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DNS_LABEL_REGEX = "[a-zA-Z0-9-]{1,%d}$" % DNS_LABEL_MAX_LEN
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def _validate_dns_format(data):
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if not data:
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return
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try:
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# Allow values ending in period '.'
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trimmed = data if not data.endswith('.') else data[:-1]
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names = trimmed.split('.')
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for name in names:
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if not name:
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raise TypeError(_("Encountered an empty component"))
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if name.endswith('-') or name[0] == '-':
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raise TypeError(
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_("Name '%s' must not start or end with a hyphen") % name)
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if not re.match(DNS_LABEL_REGEX, name):
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raise TypeError(
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_("Name '%s' must be 1-63 characters long, each of "
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"which can only be alphanumeric or a hyphen") % name)
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# RFC 1123 hints that a TLD can't be all numeric. last is a TLD if
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# it's an FQDN.
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if len(names) > 1 and re.match("^[0-9]+$", names[-1]):
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raise TypeError(_("TLD '%s' must not be all numeric") % names[-1])
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except TypeError as e:
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msg = _("'%(data)s' not a valid DNS search domain. Reason: "
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"%(reason)s") % {'data': data, 'reason': str(e)}
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return msg
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def _validate_dns_search_domain(data, max_len=db_const.NAME_FIELD_SIZE):
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msg = validators.validate_string(data, max_len)
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if msg:
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return msg
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if not data:
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return
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msg = _validate_dns_format(data)
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if msg:
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return msg
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validators.add_validator('dns_search_domain', _validate_dns_search_domain)
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ALIAS = 'dns-search-domain'
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DNS_SEARCH_DOMAIN = 'dns_search_domain'
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EXTENDED_ATTRIBUTES_2_0 = {
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'subnets': {
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DNS_SEARCH_DOMAIN: {
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'allow_post': True, 'allow_put': True,
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'default': constants.ATTR_NOT_SPECIFIED,
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'validate': {'type:dns_search_domain': db_const.NAME_FIELD_SIZE},
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'is_visible': True},
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}
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}
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class Dns_search_domain(extensions.ExtensionDescriptor):
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"""Extension class supporting dns search domains for subnets."""
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@classmethod
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def get_name(cls):
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return "DNS search Domains"
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@classmethod
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def get_alias(cls):
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return ALIAS
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@classmethod
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def get_description(cls):
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return "Enable the ability to add DNS search domain name for Subnets"
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@classmethod
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def get_updated(cls):
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return "2016-1-22T10:00:00-00:00"
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def get_extended_resources(self, version):
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if version == "2.0":
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return EXTENDED_ATTRIBUTES_2_0
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return {}
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