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# Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (https://tfs.etsi.org/)
#
# 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 json, logging, operator, requests
from requests.auth import HTTPBasicAuth
from device.service.driver_api._Driver import RESOURCE_ENDPOINTS, RESOURCE_SERVICES
LOGGER = logging.getLogger(__name__)
HTTP_OK_CODES = {
200, # OK
201, # Created
202, # Accepted
204, # No Content
}
def find_key(resource, key):
return json.loads(resource[1])[key]
def get_resource(
base_url : str, resource_key : str,
auth : Optional[HTTPBasicAuth] = None, timeout : Optional[int] = None
url = '{:s}/restconf/data/tapi-common:context'.format(base_url)
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result = []
try:
response = requests.get(url, timeout=timeout, verify=False, auth=auth)
except requests.exceptions.Timeout:
LOGGER.exception('Timeout connecting {:s}'.format(url))
return result
except Exception as e: # pylint: disable=broad-except
LOGGER.exception('Exception retrieving {:s}'.format(resource_key))
result.append((resource_key, e))
return result
try:
context = json.loads(response.content)
except Exception as e: # pylint: disable=broad-except
LOGGER.warning('Unable to decode reply: {:s}'.format(str(response.content)))
result.append((resource_key, e))
return result
if resource_key == RESOURCE_ENDPOINTS:
if 'tapi-common:context' in context:
context = context['tapi-common:context']
elif 'context' in context:
context = context['context']
for sip in context['service-interface-point']:
layer_protocol_name = sip.get('layer-protocol-name', '?')
supportable_spectrum = sip.get('tapi-photonic-media:media-channel-service-interface-point-spec', {})
supportable_spectrum = supportable_spectrum.get('mc-pool', {})
supportable_spectrum = supportable_spectrum.get('supportable-spectrum', [])
supportable_spectrum = supportable_spectrum[0] if len(supportable_spectrum) == 1 else {}
grid_type = supportable_spectrum.get('frequency-constraint', {}).get('grid-type')
granularity = supportable_spectrum.get('frequency-constraint', {}).get('adjustment-granularity')
direction = sip.get('direction', '?')
endpoint_type = [layer_protocol_name, grid_type, granularity, direction]
str_endpoint_type = ':'.join(filter(lambda i: operator.is_not(i, None), endpoint_type))
sip_uuid = sip['uuid']
sip_names = sip.get('name', [])
sip_name = next(iter([
sip_name['value']
for sip_name in sip_names
if sip_name['value-name'] == 'local-name'
]), sip_uuid)
endpoint_url = '/endpoints/endpoint[{:s}]'.format(sip_uuid)
endpoint_data = {'uuid': sip_uuid, 'name': sip_name, 'type': str_endpoint_type}
result.append((endpoint_url, endpoint_data))
elif resource_key == RESOURCE_SERVICES:
if 'tapi-common:context' in context:
context = context['tapi-common:context']
elif 'context' in context:
context = context['context']
if 'tapi-connectivity:connectivity-context' in context:
context = context['tapi-connectivity:connectivity-context']
elif 'connectivity-context' in context:
context = context['connectivity-context']
for conn_svc in context['connectivity-service']:
service_uuid = conn_svc['uuid']
constraints = conn_svc.get('connectivity-constraint', {})
total_req_cap = constraints.get('requested-capacity', {}).get('total-size', {})
service_url = '/services/service[{:s}]'.format(service_uuid)
service_data = {
'uuid': service_uuid,
'direction': constraints.get('connectivity-direction', 'UNIDIRECTIONAL'),
'capacity_unit': total_req_cap.get('unit', '<UNDEFINED>'),
'capacity_value': total_req_cap.get('value', '<UNDEFINED>'),
}
for i,endpoint in enumerate(conn_svc.get('end-point', [])):
layer_protocol_name = endpoint.get('layer-protocol-name')
if layer_protocol_name is not None:
service_data['layer_protocol_name'] = layer_protocol_name
layer_protocol_qualifier = endpoint.get('layer-protocol-qualifier')
if layer_protocol_qualifier is not None:
service_data['layer_protocol_qualifier'] = layer_protocol_qualifier
sip = endpoint['service-interface-point']['service-interface-point-uuid']
service_data['input_sip' if i == 0 else 'output_sip'] = sip
result.append((service_url, service_data))
return result
def create_resource(
base_url : str, resource_key : str, resource_value : Dict,
auth : Optional[HTTPBasicAuth] = None, timeout : Optional[int] = None
):
uuid = find_key(resource, 'uuid')
input_sip = find_key(resource, 'input_sip_uuid')
output_sip = find_key(resource, 'output_sip_uuid')
capacity_value = find_key(resource, 'capacity_value')
capacity_unit = find_key(resource, 'capacity_unit')
layer_protocol_name = find_key(resource, 'layer_protocol_name')
layer_protocol_qualifier = find_key(resource, 'layer_protocol_qualifier')
direction = find_key(resource, 'direction')
url = '{:s}/restconf/data/tapi-common:context/tapi-connectivity:connectivity-context'.format(base_url)
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headers = {'content-type': 'application/json'}
data = {
'tapi-connectivity:connectivity-service': [
{
'uuid': uuid,
'connectivity-constraint': {
'requested-capacity': {
'total-size': {
'value': capacity_value,
'unit': capacity_unit
}
},
'connectivity-direction': direction
},
'end-point': [
{
'service-interface-point': {
'service-interface-point-uuid': input_sip
},
'layer-protocol-name': layer_protocol_name,
'layer-protocol-qualifier': layer_protocol_qualifier,
'local-id': input_sip
},
{
'service-interface-point': {
'service-interface-point-uuid': output_sip
},
'layer-protocol-name': layer_protocol_name,
'layer-protocol-qualifier': layer_protocol_qualifier,
'local-id': output_sip
}
]
}
]
}
results = []
try:
LOGGER.info('Connectivity service {:s}: {:s}'.format(str(uuid), str(data)))
response = requests.post(
url=url, data=json.dumps(data), timeout=timeout, headers=headers, verify=False, auth=auth)
LOGGER.info('TAPI response: {:s}'.format(str(response)))
except Exception as e: # pylint: disable=broad-except
LOGGER.exception('Exception creating ConnectivityService(uuid={:s}, data={:s})'.format(str(uuid), str(data)))
results.append(e)
else:
if response.status_code not in HTTP_OK_CODES:
msg = 'Could not create ConnectivityService(uuid={:s}, data={:s}). status_code={:s} reply={:s}'
LOGGER.error(msg.format(str(uuid), str(data), str(response.status_code), str(response)))
results.append(response.status_code in HTTP_OK_CODES)
return results
def delete_resource(
base_url : str, resource_key : str, resource_value : Dict,
auth : Optional[HTTPBasicAuth] = None, timeout : Optional[int] = None
):
uuid = find_key(resource, 'uuid')
url = '{:s}/restconf/data/tapi-common:context/tapi-connectivity:connectivity-context/connectivity-service={:s}'
results = []
try:
response = requests.delete(url=url, timeout=timeout, verify=False, auth=auth)
except Exception as e: # pylint: disable=broad-except
LOGGER.exception('Exception deleting ConnectivityService(uuid={:s})'.format(str(uuid)))
results.append(e)
else:
if response.status_code not in HTTP_OK_CODES:
msg = 'Could not delete ConnectivityService(uuid={:s}). status_code={:s} reply={:s}'
LOGGER.error(msg.format(str(uuid), str(response.status_code), str(response)))
results.append(response.status_code in HTTP_OK_CODES)
return results