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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 grpc, json, logging
from typing import Optional
from bgpls_speaker.service.tools.DiscoveredDBManager import DiscoveredDBManager, GetContextDevices
from bgpls_speaker.service.tools.GrpcServer import GrpcServer
from bgpls_speaker.service.tools.json_loader import getInterfaceFromJson, getInterfaceFromNodeNames
from common.method_wrappers.Decorator import MetricsPool, safe_and_metered_rpc_method
from common.method_wrappers.ServiceExceptions import AlreadyExistsException, InvalidArgumentException
from common.proto.context_pb2 import (DeviceId, Empty, EndPointId, Link, LinkId, Service, ServiceId, ServiceStatusEnum, ServiceTypeEnum, TopologyId,ContextId,Topology
,Device,DeviceDriverEnum, Uuid)
from common.proto.pathcomp_pb2 import PathCompRequest
from common.proto.service_pb2_grpc import ServiceServiceServicer
from common.tools.grpc.Tools import grpc_message_to_json, grpc_message_to_json_string
from context.client.ContextClient import ContextClient
from pathcomp.frontend.client.PathCompClient import PathCompClient
from common.proto.bgpls_pb2 import (BgplsSpeaker,BgplsSpeakerId, DiscoveredDeviceList,DiscoveredDevice,
DiscoveredLink,DiscoveredLinkList,NodeDescriptors,BgplsSpeakerList)
from common.proto.bgpls_pb2_grpc import BgplsServiceServicer
# from .task_scheduler.TaskScheduler import TasksScheduler
# from .tools.ContextGetters import get_service
LOGGER = logging.getLogger(__name__)
METRICS_POOL = MetricsPool('Service', 'RPC')
class BgplsServiceServicerImpl(BgplsServiceServicer):
def __init__(self,discoveredDB : DiscoveredDBManager,
speakerServer : GrpcServer) -> None:
LOGGER.debug('Creating Servicer...')
self.speaker_handler_factory = 1
self.speaker_server=speakerServer
self.discoveredDB=discoveredDB
LOGGER.debug('Servicer Created')
# Crear metodos que mandan la topologia por grpc
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def ListDiscoveredDevices(self, request : Empty, context : grpc.ServicerContext) -> DiscoveredDeviceList:
"""
Get devices discovered from bgpls protocol
"""
device_names=self.discoveredDB.GetNodeNamesFromDiscoveredDB()
# devices_names = [DiscoveredDevice(nodeName=device_name) for device_name in device_names]
nodes = self.discoveredDB.GetNodesFromDiscoveredDB()
devices = [DiscoveredDevice(nodeName=node.node_name,igpID=node.igp_id,learntFrom=node.learnt_from) for node in nodes]
# LOGGER.debug("(ListDiscoveredDevices) Get discoveredDB manager %s",devices)
return DiscoveredDeviceList(discovereddevices=devices)
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def ListDiscoveredLinks(self, request : Empty, context : grpc.ServicerContext) -> DiscoveredLinkList:
"""
Get links discovered from bgpls protocol
"""
self.discoveredDB.UpdateNodeNameInLink()
links = self.discoveredDB.GetLinksFromDiscoveredDB()
links_info=[]
for link in links:
local=NodeDescriptors(bgplsID=link.local.bgpls_id,nodeName=link.local.node_name)
remote=NodeDescriptors(bgplsID=link.remote.bgpls_id,nodeName=link.remote.node_name)
links_info.append(DiscoveredLink(local=local,remote=remote,learntFrom=link.learnt_from))
# LOGGER.debug("(ListDiscoveredLinks) Get discoveredDB manager %s",links_info)
return DiscoveredLinkList(discoveredlinks=links_info)
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def AddBgplsSpeaker(self, request : BgplsSpeaker, context : grpc.ServicerContext) -> BgplsSpeakerId:
"""
Creates a new connection with an speaker with the given ip address, port and as.
Returns de id of the speaker created (to kill proccess¿)
"""
LOGGER.debug("(AddBgplsSpeaker) Create speaker instance %s",request)
speaker_id=self.speaker_server.connectToJavaBgpls(request.address,request.port,request.asNumber)
return BgplsSpeakerId(id=speaker_id)
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def ListBgplsSpeakers(self, request : Empty, context : grpc.ServicerContext) -> BgplsSpeakerId:
"""
Returns a list of the IDs of the BGP-LS speakers with open connections.
"""
speaker_list=[]
bgpls_speaker_list=[]
speaker_list=self.speaker_server.getSpeakerListIds()
# if(speaker_list==None)
# return
for speaker in speaker_list:
bgpls_speaker_list.append(BgplsSpeakerId(id=speaker))
return BgplsSpeakerList(speakers=bgpls_speaker_list)
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def DisconnectFromSpeaker(self, request : BgplsSpeaker, context : grpc.ServicerContext) -> bool:
"""
Disconencts from the BGP-LS speaker given its ipv4 address.
"""
speaker_id=self.speaker_server.getSpeakerIdFromIpAddr(request.address)
self.speaker_server.terminateRunnerById(speaker_id)
return Empty()
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def GetSpeakerInfoFromId(self, request : BgplsSpeakerId, context : grpc.ServicerContext) -> BgplsSpeaker:
"""
Get the address, port and as number of the speaker given its id.
"""
address,as_number,port=self.speaker_server.getSpeakerFromId(request.id)
return BgplsSpeaker(address=address,port=port,asNumber=as_number)
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def NotifyAddNodeToContext(self, request : DiscoveredDevice, context : grpc.ServicerContext) :
"""
When a node is added to context via bgpls module this function checks if there are other nodes in the
topology connected by links discovered via bgpls. Then, if the link exist adds it to the context.
TODO: get endpoints from pce module
"""
node_name=request.nodeName
LOGGER.debug("(NotifyAddNodeToContext) Find links to nodes ")
nodes_conected=self.discoveredDB.FindConnectedNodes(node_name)
# Check if nodes are in context
context_client=ContextClient()
context_client.connect()
# devices=context_client.ListDevices(Empty())
device_names,devices_ips=GetContextDevices(context_client)
LOGGER.debug("(NotifyAddNodeToContext) Devices in context: %s", device_names)
nodes_conected_in_context=list(set(nodes_conected) & set(device_names))
LOGGER.debug("(NotifyAddNodeToContext) nodes_conected_in_context: %s", nodes_conected_in_context)
# TODO: next to function
for remote_node in nodes_conected_in_context:
# TODO: get endpoints connected to remote ip (pce¿)
end_point1="eth-1/0/20"
end_point2="eth-1/0/20"
data=getInterfaceFromJson()
# LOGGER.debug ("(NotifyAddNodeToContext) data json loader: %s ",data)
interface_src,interface_dst=getInterfaceFromNodeNames(data,node_name,remote_node)
LOGGER.debug ("(NotifyAddNodeToContext) interfaces: %s ---> %s ",interface_src,interface_dst)
# End of enpoints todo
end_point_uuid1=Uuid(uuid=end_point1)
end_point_uuid2=Uuid(uuid=end_point2)
link_name_src_dest=node_name+"/"+end_point1+"=="+remote_node+"/"+end_point2
device_uuid_src=DeviceId(device_uuid=Uuid(uuid=node_name))
link_name_dest_src=remote_node+"/"+end_point2+"=="+node_name+"/"+end_point1
device_uuid_dest=DeviceId(device_uuid=Uuid(uuid=remote_node))
end_point_id1=EndPointId(endpoint_uuid=end_point_uuid1,device_id=device_uuid_src)
end_point_id2=EndPointId(endpoint_uuid=end_point_uuid2,device_id=device_uuid_dest)
end_point_ids_src_dest=[end_point_id1,end_point_id2]
end_point_ids_dest_src=[end_point_id2,end_point_id1]
link_id_src=context_client.SetLink(Link(link_id=LinkId(link_uuid=Uuid(uuid=link_name_src_dest)),
link_endpoint_ids=end_point_ids_src_dest))
link_id_dst=context_client.SetLink(Link(link_id=LinkId(link_uuid=Uuid(uuid=link_name_dest_src)),
link_endpoint_ids=end_point_ids_dest_src))
LOGGER.debug("(NotifyAddNodeToContext) Link set id src--->dst: %s", link_id_src)
# self.discoveredDB.DeleteNodeFromDiscoveredDB(node_name)
context_client.close()
return Empty()