# -*- coding: utf-8 -*-
##
# Copyright 2018 Telefonica
# All Rights Reserved.
#
# Contributors: Oscar Gonzalez de Dios, Manuel Lopez Bravo, Guillermo Pajares Martin
# 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.
#
# This work has been performed in the context of the Metro-Haul project -
# funded by the European Commission under Grant number 761727 through the
# Horizon 2020 program.
##
"""The SDN/WIM connector is responsible for establishing wide area network
connectivity.
This SDN/WIM connector implements the standard IETF RFC 8466 "A YANG Data
Model for Layer 2 Virtual Private Network (L2VPN) Service Delivery"
It receives the endpoints and the necessary details to request
the Layer 2 service.
"""
import requests
import uuid
import logging
import copy
#from osm_ro_plugin.sdnconn import SdnConnectorBase, SdnConnectorError
from .sdnconn import SdnConnectorBase, SdnConnectorError
"""Check layer where we move it"""
class WimconnectorIETFL2VPN(SdnConnectorBase):
def __init__(self, wim, wim_account, config=None, logger=None):
"""IETF L2VPN WIM connector
Arguments: (To be completed)
wim (dict): WIM record, as stored in the database
wim_account (dict): WIM account record, as stored in the database
"""
self.logger = logging.getLogger("ro.sdn.ietfl2vpn")
super().__init__(wim, wim_account, config, logger)
self.headers = {"Content-Type": "application/json"}
self.mappings = {
m["service_endpoint_id"]: m for m in self.service_endpoint_mapping
}
self.user = wim_account.get("user")
self.passwd = wim_account.get("password") # replace "passwordd" -> "password"
if self.user and self.passwd is not None:
self.auth = (self.user, self.passwd)
else:
self.auth = None
self.logger.info("IETFL2VPN Connector Initialized.")
def check_credentials(self):
endpoint = "{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/vpn-services".format(
self.wim["wim_url"]
)
try:
response = requests.get(endpoint, auth=self.auth)
http_code = response.status_code
except requests.exceptions.RequestException as e:
raise SdnConnectorError(e.response, http_code=503)
if http_code != 200:
raise SdnConnectorError("Failed while authenticating", http_code=http_code)
self.logger.info("Credentials checked")
def get_connectivity_service_status(self, service_uuid, conn_info=None):
"""Monitor the status of the connectivity service stablished
Arguments:
service_uuid: Connectivity service unique identifier
Returns:
Examples::
{'sdn_status': 'ACTIVE'}
{'sdn_status': 'INACTIVE'}
{'sdn_status': 'DOWN'}
{'sdn_status': 'ERROR'}
"""
try:
self.logger.info("Sending get connectivity service stuatus")
servicepoint = "{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/vpn-services/vpn-service={}/".format(
self.wim["wim_url"], service_uuid
)
response = requests.get(servicepoint, auth=self.auth)
self.logger.warning('response.status_code={:s}'.format(str(response.status_code)))
if response.status_code != requests.codes.ok:
raise SdnConnectorError(
"Unable to obtain connectivity servcice status",
http_code=response.status_code,
)
service_status = {"sdn_status": "ACTIVE"}
return service_status
except requests.exceptions.ConnectionError:
raise SdnConnectorError("Request Timeout", http_code=408)
def search_mapp(self, connection_point):
id = connection_point["service_endpoint_id"]
if id not in self.mappings:
raise SdnConnectorError("Endpoint {} not located".format(str(id)))
else:
return self.mappings[id]
def create_connectivity_service(self, service_type, connection_points, **kwargs):
"""Stablish WAN connectivity between the endpoints
Arguments:
service_type (str): ``ELINE`` (L2), ``ELAN`` (L2), ``ETREE`` (L2),
``L3``.
connection_points (list): each point corresponds to
an entry point from the DC to the transport network. One
connection point serves to identify the specific access and
some other service parameters, such as encapsulation type.
Represented by a dict as follows::
{
"service_endpoint_id": ..., (str[uuid])
"service_endpoint_encapsulation_type": ...,
(enum: none, dot1q, ...)
"service_endpoint_encapsulation_info": {
... (dict)
"vlan": ..., (int, present if encapsulation is dot1q)
"vni": ... (int, present if encapsulation is vxlan),
"peers": [(ipv4_1), (ipv4_2)]
(present if encapsulation is vxlan)
}
}
The service endpoint ID should be previously informed to the WIM
engine in the RO when the WIM port mapping is registered.
Keyword Arguments:
bandwidth (int): value in kilobytes
latency (int): value in milliseconds
Other QoS might be passed as keyword arguments.
Returns:
tuple: ``(service_id, conn_info)`` containing:
- *service_uuid* (str): UUID of the established connectivity
service
- *conn_info* (dict or None): Information to be stored at the
database (or ``None``). This information will be provided to
the :meth:`~.edit_connectivity_service` and :obj:`~.delete`.
**MUST** be JSON/YAML-serializable (plain data structures).
Raises:
SdnConnectorException: In case of error.
"""
SETTINGS = { # min_endpoints, max_endpoints, vpn_service_type
'ELINE': (2, 2, 'vpws'), # Virtual Private Wire Service
'ELAN' : (2, None, 'vpls'), # Virtual Private LAN Service
}
settings = SETTINGS.get(service_type)
if settings is None: raise NotImplementedError('Unsupported service_type({:s})'.format(str(service_type)))
min_endpoints, max_endpoints, vpn_service_type = settings
if max_endpoints is not None and len(connection_points) > max_endpoints:
msg = "Connections between more than {:d} endpoints are not supported for service_type {:s}"
raise SdnConnectorError(msg.format(max_endpoints, service_type))
if min_endpoints is not None and len(connection_points) < min_endpoints:
msg = "Connections must be of at least {:d} endpoints for service_type {:s}"
raise SdnConnectorError(msg.format(min_endpoints, service_type))
"""First step, create the vpn service"""
uuid_l2vpn = str(uuid.uuid4())
vpn_service = {}
vpn_service["vpn-id"] = uuid_l2vpn
vpn_service["vpn-svc-type"] = vpn_service_type
vpn_service["svc-topo"] = "any-to-any"
vpn_service["customer-name"] = "osm"
vpn_service_list = []
vpn_service_list.append(vpn_service)
vpn_service_l = {"ietf-l2vpn-svc:vpn-service": vpn_service_list}
response_service_creation = None
conn_info = []
self.logger.info("Sending vpn-service :{}".format(vpn_service_l))
try:
endpoint_service_creation = (
"{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/vpn-services".format(
self.wim["wim_url"]
)
)
response_service_creation = requests.post(
endpoint_service_creation,
headers=self.headers,
json=vpn_service_l,
auth=self.auth,
)
except requests.exceptions.ConnectionError:
raise SdnConnectorError(
"Request to create service Timeout", http_code=408
)
if response_service_creation.status_code == 409:
raise SdnConnectorError(
"Service already exists",
http_code=response_service_creation.status_code,
)
elif response_service_creation.status_code != requests.codes.created:
raise SdnConnectorError(
"Request to create service not accepted",
http_code=response_service_creation.status_code,
)
self.logger.info('connection_points = {:s}'.format(str(connection_points)))
# Check if protected paths are requested
extended_connection_points = []
for connection_point in connection_points:
extended_connection_points.append(connection_point)
connection_point_wan_info = self.search_mapp(connection_point)
service_mapping_info = connection_point_wan_info.get('service_mapping_info', {})
redundant_service_endpoint_ids = service_mapping_info.get('redundant')
if redundant_service_endpoint_ids is None: continue
if len(redundant_service_endpoint_ids) == 0: continue
for redundant_service_endpoint_id in redundant_service_endpoint_ids:
redundant_connection_point = copy.deepcopy(connection_point)
redundant_connection_point['service_endpoint_id'] = redundant_service_endpoint_id
extended_connection_points.append(redundant_connection_point)
self.logger.info('extended_connection_points = {:s}'.format(str(extended_connection_points)))
"""Second step, create the connections and vpn attachments"""
for connection_point in extended_connection_points:
connection_point_wan_info = self.search_mapp(connection_point)
site_network_access = {}
connection = {}
if connection_point["service_endpoint_encapsulation_type"] != "none":
if (
connection_point["service_endpoint_encapsulation_type"]
== "dot1q"
):
"""The connection is a VLAN"""
connection["encapsulation-type"] = "dot1q-vlan-tagged"
tagged = {}
tagged_interf = {}
service_endpoint_encapsulation_info = connection_point[
"service_endpoint_encapsulation_info"
]
if service_endpoint_encapsulation_info["vlan"] is None:
raise SdnConnectorError("VLAN must be provided")
tagged_interf["cvlan-id"] = service_endpoint_encapsulation_info[
"vlan"
]
tagged["dot1q-vlan-tagged"] = tagged_interf
connection["tagged-interface"] = tagged
else:
raise NotImplementedError("Encapsulation type not implemented")
site_network_access["connection"] = connection
self.logger.info("Sending connection:{}".format(connection))
vpn_attach = {}
vpn_attach["vpn-id"] = uuid_l2vpn
vpn_attach["site-role"] = vpn_service["svc-topo"] + "-role"
site_network_access["vpn-attachment"] = vpn_attach
self.logger.info("Sending vpn-attachement :{}".format(vpn_attach))
uuid_sna = str(uuid.uuid4())
site_network_access["network-access-id"] = uuid_sna
site_network_access["bearer"] = connection_point_wan_info[
"service_mapping_info"
]["bearer"]
access_priority = connection_point_wan_info["service_mapping_info"].get("priority")
if access_priority is not None:
availability = {}
availability["access-priority"] = access_priority
availability["single-active"] = [None]
site_network_access["availability"] = availability
constraint = {}
constraint['constraint-type'] = 'end-to-end-diverse'
constraint['target'] = {'all-other-accesses': [None]}
access_diversity = {}
access_diversity['constraints'] = {'constraint': []}
access_diversity['constraints']['constraint'].append(constraint)
site_network_access["access-diversity"] = access_diversity
site_network_accesses = {}
site_network_access_list = []
site_network_access_list.append(site_network_access)
site_network_accesses[
"ietf-l2vpn-svc:site-network-access"
] = site_network_access_list
conn_info_d = {}
conn_info_d["site"] = connection_point_wan_info["service_mapping_info"][
"site-id"
]
conn_info_d["site-network-access-id"] = site_network_access[
"network-access-id"
]
conn_info_d["mapping"] = None
conn_info.append(conn_info_d)
try:
endpoint_site_network_access_creation = (
"{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/"
"sites/site={}/site-network-accesses/".format(
self.wim["wim_url"],
connection_point_wan_info["service_mapping_info"][
"site-id"
],
)
)
response_endpoint_site_network_access_creation = requests.post(
endpoint_site_network_access_creation,
headers=self.headers,
json=site_network_accesses,
auth=self.auth,
)
if (
response_endpoint_site_network_access_creation.status_code
== 409
):
self.delete_connectivity_service(vpn_service["vpn-id"])
raise SdnConnectorError(
"Site_Network_Access with ID '{}' already exists".format(
site_network_access["network-access-id"]
),
http_code=response_endpoint_site_network_access_creation.status_code,
)
elif (
response_endpoint_site_network_access_creation.status_code
== 400
):
self.delete_connectivity_service(vpn_service["vpn-id"])
raise SdnConnectorError(
"Site {} does not exist".format(
connection_point_wan_info["service_mapping_info"][
"site-id"
]
),
http_code=response_endpoint_site_network_access_creation.status_code,
)
elif (
response_endpoint_site_network_access_creation.status_code
!= requests.codes.created
and response_endpoint_site_network_access_creation.status_code
!= requests.codes.no_content
):
self.delete_connectivity_service(vpn_service["vpn-id"])
raise SdnConnectorError(
"Request not accepted",
http_code=response_endpoint_site_network_access_creation.status_code,
)
except requests.exceptions.ConnectionError:
self.delete_connectivity_service(vpn_service["vpn-id"])
raise SdnConnectorError("Request Timeout", http_code=408)
return uuid_l2vpn, conn_info
def delete_connectivity_service(self, service_uuid, conn_info=None):
"""Disconnect multi-site endpoints previously connected
This method should receive as the first argument the UUID generated by
the ``create_connectivity_service``
"""
try:
self.logger.info("Sending delete")
servicepoint = "{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/vpn-services/vpn-service={}/".format(
self.wim["wim_url"], service_uuid
)
response = requests.delete(servicepoint, auth=self.auth)
if response.status_code != requests.codes.no_content:
raise SdnConnectorError(
"Error in the request", http_code=response.status_code
)
except requests.exceptions.ConnectionError:
raise SdnConnectorError("Request Timeout", http_code=408)
def edit_connectivity_service(
self, service_uuid, conn_info=None, connection_points=None, **kwargs
):
"""Change an existing connectivity service, see
``create_connectivity_service``"""
# sites = {"sites": {}}
# site_list = []
vpn_service = {}
vpn_service["svc-topo"] = "any-to-any"
counter = 0
for connection_point in connection_points:
site_network_access = {}
connection_point_wan_info = self.search_mapp(connection_point)
params_site = {}
params_site["site-id"] = connection_point_wan_info["service_mapping_info"][
"site-id"
]
params_site["site-vpn-flavor"] = "site-vpn-flavor-single"
device_site = {}
device_site["device-id"] = connection_point_wan_info["device-id"]
params_site["devices"] = device_site
# network_access = {}
connection = {}
if connection_point["service_endpoint_encapsulation_type"] != "none":
if connection_point["service_endpoint_encapsulation_type"] == "dot1q":
"""The connection is a VLAN"""
connection["encapsulation-type"] = "dot1q-vlan-tagged"
tagged = {}
tagged_interf = {}
service_endpoint_encapsulation_info = connection_point[
"service_endpoint_encapsulation_info"
]
if service_endpoint_encapsulation_info["vlan"] is None:
raise SdnConnectorError("VLAN must be provided")
tagged_interf["cvlan-id"] = service_endpoint_encapsulation_info[
"vlan"
]
tagged["dot1q-vlan-tagged"] = tagged_interf
connection["tagged-interface"] = tagged
else:
raise NotImplementedError("Encapsulation type not implemented")
site_network_access["connection"] = connection
vpn_attach = {}
vpn_attach["vpn-id"] = service_uuid
vpn_attach["site-role"] = vpn_service["svc-topo"] + "-role"
site_network_access["vpn-attachment"] = vpn_attach
uuid_sna = conn_info[counter]["site-network-access-id"]
site_network_access["network-access-id"] = uuid_sna
site_network_access["bearer"] = connection_point_wan_info[
"service_mapping_info"
]["bearer"]
site_network_accesses = {}
site_network_access_list = []
site_network_access_list.append(site_network_access)
site_network_accesses[
"ietf-l2vpn-svc:site-network-access"
] = site_network_access_list
try:
endpoint_site_network_access_edit = (
"{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/"
"sites/site={}/site-network-accesses/".format(
self.wim["wim_url"],
connection_point_wan_info["service_mapping_info"]["site-id"],
)
)
response_endpoint_site_network_access_creation = requests.put(
endpoint_site_network_access_edit,
headers=self.headers,
json=site_network_accesses,
auth=self.auth,
)
if response_endpoint_site_network_access_creation.status_code == 400:
raise SdnConnectorError(
"Service does not exist",
http_code=response_endpoint_site_network_access_creation.status_code,
)
elif (
response_endpoint_site_network_access_creation.status_code != 201
and response_endpoint_site_network_access_creation.status_code
!= 204
):
raise SdnConnectorError(
"Request no accepted",
http_code=response_endpoint_site_network_access_creation.status_code,
)
except requests.exceptions.ConnectionError:
raise SdnConnectorError("Request Timeout", http_code=408)
counter += 1
return None
def clear_all_connectivity_services(self):
"""Delete all WAN Links corresponding to a WIM"""
try:
self.logger.info("Sending clear all connectivity services")
servicepoint = (
"{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/vpn-services".format(
self.wim["wim_url"]
)
)
response = requests.delete(servicepoint, auth=self.auth)
if response.status_code != requests.codes.no_content:
raise SdnConnectorError(
"Unable to clear all connectivity services",
http_code=response.status_code,
)
except requests.exceptions.ConnectionError:
raise SdnConnectorError("Request Timeout", http_code=408)
def get_all_active_connectivity_services(self):
"""Provide information about all active connections provisioned by a
WIM
"""
try:
self.logger.info("Sending get all connectivity services")
servicepoint = (
"{}/restconf/data/ietf-l2vpn-svc:l2vpn-svc/vpn-services".format(
self.wim["wim_url"]
)
)
response = requests.get(servicepoint, auth=self.auth)
if response.status_code != requests.codes.ok:
raise SdnConnectorError(
"Unable to get all connectivity services",
http_code=response.status_code,
)
return response
except requests.exceptions.ConnectionError:
raise SdnConnectorError("Request Timeout", http_code=408)