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# Copyright 2022-2024 ETSI OSG/SDG TeraFlowSDN (TFS) (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 logging
from typing import Any, Dict, Optional, Tuple, TypedDict
import requests
from common.proto.kpi_sample_types_pb2 import KpiSampleType
from common.type_checkers.Checkers import chk_attribute, chk_string, chk_type
from device.service.driver_api._Driver import RESOURCE_ENDPOINTS
from .Constants import SPECIAL_RESOURCE_MAPPINGS
LOGGER = logging.getLogger(__name__)
def service_exists(wim_url: str, auth, service_uuid: str) -> bool:
try:
get_connectivity_service(wim_url, auth, service_uuid)
return True
except: # pylint: disable=bare-except
return False
def get_all_active_connectivity_services(wim_url: str, auth):
try:
LOGGER.info("Sending get all connectivity services")
servicepoint = f"{wim_url}/restconf/data/ietf-l3vpn-svc:l3vpn-svc/vpn-services"
response = requests.get(servicepoint, auth=auth)
if response.status_code != requests.codes.ok:
raise Exception(
"Unable to get all connectivity services",
http_code=response.status_code,
)
return response
except requests.exceptions.ConnectionError:
raise Exception("Request Timeout", http_code=408)
def get_connectivity_service(wim_url, auth, service_uuid):
try:
LOGGER.info("Sending get connectivity service")
servicepoint = f"{wim_url}/restconf/data/ietf-l3vpn-svc:l3vpn-svc/vpn-services/vpn-service={service_uuid}"
response = requests.get(servicepoint)
if response.status_code != requests.codes.ok:
raise Exception(
"Unable to get connectivity service{:s}".format(str(service_uuid)),
http_code=response.status_code,
)
return response
except requests.exceptions.ConnectionError:
raise Exception("Request Timeout", http_code=408)
def create_slice_datamodel(resource_value: dict) -> dict:
src_node_id: str = resource_value["src_node_id"]
src_mgmt_ip_address: str = resource_value["src_mgmt_ip_address"]
src_ac_node_id: str = resource_value["src_ac_node_id"]
src_ac_ep_id: str = resource_value["src_ac_ep_id"]
src_vlan: str = resource_value["src_vlan"]
dst_node_id: str = resource_value["dst_node_id"]
dst_mgmt_ip_address: str = resource_value["dst_mgmt_ip_address"]
dst_ac_node_id: str = resource_value["dst_ac_node_id"]
dst_ac_ep_id: str = resource_value["dst_ac_ep_id"]
dst_vlan: str = resource_value["dst_vlan"]
slice_id: str = resource_value["slice_id"]
delay: str = resource_value["delay"]
bandwidth: str = resource_value["bandwidth"]
packet_loss: str = resource_value["packet_loss"]
sdps = [
{
"id": "1",
"node-id": src_node_id,
"sdp-ip-address": [src_mgmt_ip_address],
"service-match-criteria": {
"match-criterion": [
{
"index": 1,
"match-type": [
{
"type": "ietf-network-slice-service:vlan",
"value": [src_vlan],
},
],
"target-connection-group-id": "line1",
}
]
},
"attachment-circuits": {
"attachment-circuit": [
{
"id": "0",
"description": "dsc",
"ac-node-id": src_ac_node_id,
"ac-tp-id": src_ac_ep_id,
}
]
},
},
{
"id": "2",
"node-id": dst_node_id,
"sdp-ip-address": [dst_mgmt_ip_address],
"service-match-criteria": {
"match-criterion": [
{
"index": 1,
"match-type": [
{
"type": "ietf-network-slice-service:vlan",
"value": [dst_vlan],
},
],
"target-connection-group-id": "line1",
}
]
},
"attachment-circuits": {
"attachment-circuit": [
{
"id": "0",
"description": "dsc",
"ac-node-id": dst_ac_node_id,
"ac-tp-id": dst_ac_ep_id,
}
]
},
},
]
connection_groups = [
{
"id": "line1",
"connectivity-type": "point-to-point",
"connectivity-construct": [
{
"id": 1,
"p2mp-sender-sdp": "1",
"p2mp-receiver-sdp": ["2"],
"service-slo-sle-policy": {
"slo-policy": {
"metric-bound": [
{
"metric-type": "ietf-network-slice-service:one-way-delay-maximum",
"metric-unit": "milliseconds",
"bound": delay,
},
{
"metric-type": "ietf-network-slice-service:one-way-bandwidth",
"metric-unit": "Mbps",
"bound": bandwidth,
},
{
"metric-type": "ietf-network-slice-service:two-way-packet-loss",
"metric-unit": "percentage",
"percentile-value": packet_loss,
},
]
}
},
},
{
"id": 2,
"p2mp-sender-sdp": "2",
"p2mp-receiver-sdp": ["1"],
"service-slo-sle-policy": {
"slo-policy": {
"metric-bound": [
{
"metric-type": "ietf-network-slice-service:one-way-delay-maximum",
"metric-unit": "milliseconds",
"bound": delay,
},
{
"metric-type": "ietf-network-slice-service:one-way-bandwidth",
"metric-unit": "Mbps",
"bound": bandwidth,
},
{
"metric-type": "ietf-network-slice-service:two-way-packet-loss",
"metric-unit": "percentage",
"percentile-value": packet_loss,
},
]
}
},
},
],
}
]
slice_service = {
"id": slice_id,
"description": "dsc",
"sdps": {"sdp": sdps},
"connection-groups": {"connection-group": connection_groups},
}
slice_data_model = {"network-slice-services": {"slice-service": [slice_service]}}
return slice_data_model
def process_optional_string_field(
endpoint_data: Dict[str, Any],
field_name: str,
endpoint_resource_value: Dict[str, Any],
) -> None:
field_value = chk_attribute(
field_name, endpoint_data, "endpoint_data", default=None
)
if field_value is None:
return
chk_string("endpoint_data.{:s}".format(field_name), field_value)
if len(field_value) > 0:
endpoint_resource_value[field_name] = field_value
def compose_resource_endpoint(
endpoint_data: Dict[str, Any],
) -> Optional[Tuple[str, Dict]]:
try:
# Check type of endpoint_data
chk_type("endpoint_data", endpoint_data, dict)
# Check endpoint UUID (mandatory)
endpoint_uuid = chk_attribute("uuid", endpoint_data, "endpoint_data")
chk_string("endpoint_data.uuid", endpoint_uuid, min_length=1)
endpoint_resource_path = SPECIAL_RESOURCE_MAPPINGS.get(RESOURCE_ENDPOINTS)
endpoint_resource_key = "{:s}/endpoint[{:s}]".format(
endpoint_resource_path, endpoint_uuid
)
endpoint_resource_value = {"uuid": endpoint_uuid}
# Check endpoint optional string fields
process_optional_string_field(endpoint_data, "name", endpoint_resource_value)
process_optional_string_field(
endpoint_data, "site_location", endpoint_resource_value
)
process_optional_string_field(endpoint_data, "ce-ip", endpoint_resource_value)
process_optional_string_field(
endpoint_data, "address_ip", endpoint_resource_value
)
process_optional_string_field(
endpoint_data, "address_prefix", endpoint_resource_value
)
process_optional_string_field(endpoint_data, "mtu", endpoint_resource_value)
process_optional_string_field(
endpoint_data, "ipv4_lan_prefixes", endpoint_resource_value
)
process_optional_string_field(endpoint_data, "type", endpoint_resource_value)
process_optional_string_field(
endpoint_data, "context_uuid", endpoint_resource_value
)
process_optional_string_field(
endpoint_data, "topology_uuid", endpoint_resource_value
)
# Check endpoint sample types (optional)
endpoint_sample_types = chk_attribute(
"sample_types", endpoint_data, "endpoint_data", default=[]
)
chk_type("endpoint_data.sample_types", endpoint_sample_types, list)
sample_types = {}
sample_type_errors = []
for i, endpoint_sample_type in enumerate(endpoint_sample_types):
field_name = "endpoint_data.sample_types[{:d}]".format(i)
try:
chk_type(field_name, endpoint_sample_type, (int, str))
if isinstance(endpoint_sample_type, int):
metric_name = KpiSampleType.Name(endpoint_sample_type)
metric_id = endpoint_sample_type
elif isinstance(endpoint_sample_type, str):
metric_id = KpiSampleType.Value(endpoint_sample_type)
metric_name = endpoint_sample_type
else:
str_type = str(type(endpoint_sample_type))
raise Exception("Bad format: {:s}".format(str_type)) # pylint: disable=broad-exception-raised
except Exception as e: # pylint: disable=broad-exception-caught
MSG = "Unsupported {:s}({:s}) : {:s}"
sample_type_errors.append(
MSG.format(field_name, str(endpoint_sample_type), str(e))
)
metric_name = metric_name.lower().replace("kpisampletype_", "")
monitoring_resource_key = "{:s}/state/{:s}".format(
endpoint_resource_key, metric_name
)
sample_types[metric_id] = monitoring_resource_key
if len(sample_type_errors) > 0:
# pylint: disable=broad-exception-raised
raise Exception(
"Malformed Sample Types:\n{:s}".format("\n".join(sample_type_errors))
)
if len(sample_types) > 0:
endpoint_resource_value["sample_types"] = sample_types
if "site_location" in endpoint_data:
endpoint_resource_value["site_location"] = endpoint_data["site_location"]
if "ce-ip" in endpoint_data:
endpoint_resource_value["ce-ip"] = endpoint_data["ce-ip"]
if "address_ip" in endpoint_data:
endpoint_resource_value["address_ip"] = endpoint_data["address_ip"]
if "address_prefix" in endpoint_data:
endpoint_resource_value["address_prefix"] = endpoint_data["address_prefix"]
if "mtu" in endpoint_data:
endpoint_resource_value["mtu"] = endpoint_data["mtu"]
if "ipv4_lan_prefixes" in endpoint_data:
endpoint_resource_value["ipv4_lan_prefixes"] = endpoint_data[
"ipv4_lan_prefixes"
]
return endpoint_resource_key, endpoint_resource_value
except: # pylint: disable=bare-except
LOGGER.exception("Problem composing endpoint({:s})".format(str(endpoint_data)))
return None