vmware-nsx/vmware_nsx/extensions/dns_search_domain.py
Henry Gessau 37487161bd Use ExtensionDescriptor from neutron-lib
ExtensionDescriptor has been rehomed to neutron-lib and is being
removed from neutron core.

See https://review.openstack.org/398113

Depends-On: I5a111e0033e518e39b3042f047ee9eebba77a0d5

Change-Id: I0f8b11bebed9bbb06273c0f9257ec1916e0201ea
2016-11-28 01:30:38 -08:00

104 lines
3.3 KiB
Python

# Copyright 2016 VMware, Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import re
from neutron_lib.api import extensions
from neutron_lib.api import validators
from neutron_lib import constants
from neutron_lib.db import constants as db_const
from vmware_nsx._i18n import _
DNS_LABEL_MAX_LEN = 63
DNS_LABEL_REGEX = "[a-zA-Z0-9-]{1,%d}$" % DNS_LABEL_MAX_LEN
def _validate_dns_format(data):
if not data:
return
try:
# Allow values ending in period '.'
trimmed = data if not data.endswith('.') else data[:-1]
names = trimmed.split('.')
for name in names:
if not name:
raise TypeError(_("Encountered an empty component"))
if name.endswith('-') or name[0] == '-':
raise TypeError(
_("Name '%s' must not start or end with a hyphen") % name)
if not re.match(DNS_LABEL_REGEX, name):
raise TypeError(
_("Name '%s' must be 1-63 characters long, each of "
"which can only be alphanumeric or a hyphen") % name)
# RFC 1123 hints that a TLD can't be all numeric. last is a TLD if
# it's an FQDN.
if len(names) > 1 and re.match("^[0-9]+$", names[-1]):
raise TypeError(_("TLD '%s' must not be all numeric") % names[-1])
except TypeError as e:
msg = _("'%(data)s' not a valid DNS search domain. Reason: "
"%(reason)s") % {'data': data, 'reason': str(e)}
return msg
def _validate_dns_search_domain(data, max_len=db_const.NAME_FIELD_SIZE):
msg = validators.validate_string(data, max_len)
if msg:
return msg
if not data:
return
msg = _validate_dns_format(data)
if msg:
return msg
validators.add_validator('dns_search_domain', _validate_dns_search_domain)
DNS_SEARCH_DOMAIN = 'dns_search_domain'
EXTENDED_ATTRIBUTES_2_0 = {
'subnets': {
DNS_SEARCH_DOMAIN: {
'allow_post': True, 'allow_put': True,
'default': constants.ATTR_NOT_SPECIFIED,
'validate': {'type:dns_search_domain': db_const.NAME_FIELD_SIZE},
'is_visible': True},
}
}
class Dns_search_domain(extensions.ExtensionDescriptor):
"""Extension class supporting dns search domains for subnets."""
@classmethod
def get_name(cls):
return "DNS search Domains"
@classmethod
def get_alias(cls):
return "dns-search-domain"
@classmethod
def get_description(cls):
return "Enable the ability to add DNS search domain name for Subnets"
@classmethod
def get_updated(cls):
return "2016-1-22T10:00:00-00:00"
def get_extended_resources(self, version):
if version == "2.0":
return EXTENDED_ATTRIBUTES_2_0
return {}