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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# 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 re
from netmodel.model.type import Integer, Bool
from vicn.core.attribute import Attribute
from vicn.core.exception import ResourceNotFound
from vicn.core.requirement import Requirement
from vicn.core.resource_mgr import wait_resource_task
from vicn.core.task import async_task, task, BashTask, EmptyTask
from vicn.core.task import inherit_parent
from vicn.resource.icn.forwarder import Forwarder
from vicn.resource.node import Node
from vicn.resource.vpp.vpp_commands import CMD_VPP_ENABLE_PLUGIN
CMD_VPP_CICN_GET = "vppctl_wrapper cicn show"
CMD_VPP_ADD_ICN_ROUTE = 'vppctl_wrapper cicn cfg fib add prefix {route.prefix} face {route.face.id}'
CMD_VPP_ADD_ICN_FACE = 'vppctl_wrapper cicn cfg face add local {face.src.ip4_address}:{face.src_port} remote {face.dst.ip4_address}:{face.dst_port}'
CMD_VPP_CICN_GET_CACHE_SIZE = 'vppctl_wrapper cicn show | grep "CS entries" | grep -Eo "[0-9]+"'
CMD_VPP_CICN_SET_CACHE_SIZE = 'vppctl_wrapper cicn control param cs size {self.cache_size}'
_ADD_FACE_RETURN_FORMAT = "Face ID: [0-9]+"
def check_face_id_return_format(data):
prog = re.compile(_ADD_FACE_RETURN_FORMAT)
return prog.match(data)
def parse_face_id(data):
return data.partition(':')[2]
class CICNForwarder(Forwarder):
"""
NOTE: Based on the Vagrantfile, we recommend a node with mem=4096, cpu=4
"""
node = Attribute(Node,
mandatory=True,
requirements = [Requirement('vpp')],
reverse_name='cicn')
numa_node = Attribute(Integer,
description = 'Numa node on which vpp will run',
default = None)
core = Attribute(Integer,
description = 'Core belonging the numa node on which vpp will run',
default = None)
enable_worker = Attribute(Bool,
description = 'Enable one worker for packet processing',
default = False)
#__packages__ = ['vpp-plugin-cicn']
def __after__(self):
return ['CentralICN']
@inherit_parent
def __get__(self):
def parse(rv):
if rv.return_value > 0 or 'cicn: not enabled' in rv.stdout or "Forwarder : disabled" in rv.stdout:
raise ResourceNotFound
return BashTask(self.node, CMD_VPP_CICN_GET,
lock = self.node.vpp.vppctl_lock, parse=parse)
@inherit_parent
def __create__(self):
#self.node.vpp.plugins.append("cicn")
lock = self.node.vpp.vppctl_lock
create_task = BashTask(self.node, CMD_VPP_ENABLE_PLUGIN,
{'plugin' : 'cicn'}, lock = lock)
face_task = EmptyTask()
route_task = EmptyTask()
def parse_face(rv, face):
if check_face_id_return_format(rv.stdout):
face.id = parse_face_id(rv.stdout)
return {}
for face in self.faces:
face_task = face_task > BashTask(self.node, CMD_VPP_ADD_ICN_FACE,
{'face':face},
parse = (lambda x, y=face : parse_face(x, y)), lock = lock)
if not self.routes:
from vicn.resource.icn.route import Route
for route in self._state.manager.by_type(Route):
if route.node is self.node:
self.routes.append(route)
for route in self.routes:
route_task = route_task > BashTask(self.node,
CMD_VPP_ADD_ICN_ROUTE, {'route' : route}, lock = lock)
return (wait_resource_task(self.node.vpp) > create_task) > (face_task > route_task)
#--------------------------------------------------------------------------
# Attributes
#--------------------------------------------------------------------------
# Force local update
_add_faces = None
_remove_faces = None
_get_faces = None
_set_faces = None
_add_routes = None
_remove_routes = None
_get_routes = None
_set_routes = None
#--------------------------------------------------------------------------
# Internal methods
#--------------------------------------------------------------------------
def _set_cache_size(self):
return BashTask(self.node, CMD_VPP_CICN_SET_CACHE_SIZE, {'self': self},
lock = self.node.vpp.vppctl_lock)
def _get_cache_size(self):
def parse(rv):
if not rv.stdout:
return 0
else:
return int(rv.stdout)
return BashTask(self.node, CMD_VPP_CICN_GET_CACHE_SIZE, parse=parse,
lock = self.node.vpp.vppctl_lock)
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