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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.
# Mock MicroWave SDN controller
# -----------------------------
# REST server implementing minimal support for:
# - IETF YANG data model for Network Topology
# Ref: https://www.rfc-editor.org/rfc/rfc8345.html
# - IETF YANG data model for Transport Network Client Signals
# Ref: https://www.ietf.org/archive/id/draft-ietf-ccamp-client-signal-yang-07.html
# Ref: https://blog.miguelgrinberg.com/post/running-your-flask-application-over-https
# Ref: https://blog.miguelgrinberg.com/post/designing-a-restful-api-using-flask-restful
import functools, logging, sys, time
from flask import Flask, abort, jsonify, make_response, request
from flask_restful import Api, Resource
BIND_ADDRESS = '0.0.0.0'
BIND_PORT = 8443
BASE_URL = '/nmswebs/restconf/data'
STR_ENDPOINT = 'https://{:s}:{:s}{:s}'.format(str(BIND_ADDRESS), str(BIND_PORT), str(BASE_URL))
LOG_LEVEL = logging.DEBUG
NETWORK_NODES = [
{'node-id': '172.18.0.1', 'ietf-network-topology:termination-point': [
{'tp-id': '1', 'ietf-te-topology:te': {'name': 'ethernet'}},
{'tp-id': '2', 'ietf-te-topology:te': {'name': 'antena' }},
]},
{'node-id': '172.18.0.2', 'ietf-network-topology:termination-point': [
{'tp-id': '1', 'ietf-te-topology:te': {'name': 'ethernet'}},
{'tp-id': '2', 'ietf-te-topology:te': {'name': 'antena' }},
]},
{'node-id': '172.18.0.3', 'ietf-network-topology:termination-point': [
{'tp-id': '1', 'ietf-te-topology:te': {'name': 'ethernet'}},
{'tp-id': '2', 'ietf-te-topology:te': {'name': 'antena' }},
]},
{'node-id': '172.18.0.4', 'ietf-network-topology:termination-point': [
{'tp-id': '1', 'ietf-te-topology:te': {'name': 'ethernet'}},
{'tp-id': '2', 'ietf-te-topology:te': {'name': 'antena' }},
{ 'link-id' : '172.18.0.1:2--172.18.0.2:2',
'source' : {'source-node': '172.18.0.1', 'source-tp': '2'},
'destination': {'dest-node' : '172.18.0.2', 'dest-tp' : '2'},
{ 'link-id' : '172.18.0.3:2--172.18.0.4:2',
'source' : {'source-node': '172.18.0.3', 'source-tp': '2'},
'destination': {'dest-node' : '172.18.0.4', 'dest-tp' : '2'},
}
]
NETWORK_SERVICES = {}
logging.basicConfig(level=LOG_LEVEL, format="[%(asctime)s] %(levelname)s:%(name)s:%(message)s")
LOGGER = logging.getLogger(__name__)
logging.getLogger('werkzeug').setLevel(logging.WARNING)
def log_request(logger : logging.Logger, response):
timestamp = time.strftime('[%Y-%b-%d %H:%M]')
logger.info('%s %s %s %s %s', timestamp, request.remote_addr, request.method, request.full_path, response.status)
return response
class Health(Resource):
def get(self):
return make_response(jsonify({}), 200)
class Network(Resource):
def get(self, network_uuid : str):
if network_uuid != 'SIAE-ETH-TOPOLOGY': abort(400)
network = {'node': NETWORK_NODES, 'ietf-network-topology:link': NETWORK_LINKS}
return make_response(jsonify({'ietf-network:network': network}), 200)
class Services(Resource):
def get(self):
services = [service for service in NETWORK_SERVICES.values()]
return make_response(jsonify({'ietf-eth-tran-service:etht-svc': {'etht-svc-instances': services}}), 200)
json_request = request.get_json()
if not json_request: abort(400)
if not isinstance(json_request, dict): abort(400)
if 'etht-svc-instances' not in json_request: abort(400)
json_services = json_request['etht-svc-instances']
if not isinstance(json_services, list): abort(400)
if len(json_services) != 1: abort(400)
svc_data = json_services[0]
etht_svc_name = svc_data['etht-svc-name']
NETWORK_SERVICES[etht_svc_name] = svc_data
return make_response(jsonify({}), 201)
class DelServices(Resource):
def delete(self, service_uuid : str):
NETWORK_SERVICES.pop(service_uuid, None)
return make_response(jsonify({}), 204)
def main():
LOGGER.info('Starting...')
app = Flask(__name__)
app.after_request(functools.partial(log_request, LOGGER))
api = Api(app, prefix=BASE_URL)
api.add_resource(Health, '/ietf-network:networks')
api.add_resource(Network, '/ietf-network:networks/network=<string:network_uuid>')
api.add_resource(Services, '/ietf-eth-tran-service:etht-svc')
api.add_resource(DelServices, '/ietf-eth-tran-service:etht-svc/etht-svc-instances=<string:service_uuid>')
LOGGER.info('Listening on {:s}...'.format(str(STR_ENDPOINT)))
app.run(debug=True, host=BIND_ADDRESS, port=BIND_PORT, ssl_context='adhoc')
LOGGER.info('Bye')
return 0
if __name__ == '__main__':
sys.exit(main())