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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.
#
from netmodel.model.type import String
from vicn.core.resource import Resource
from vicn.core.attribute import Attribute
from vicn.core.task import EmptyTask
from vicn.resource.ip_assignment import Ipv6Assignment, Ipv4Assignment
from math import log, ceil
class Channel(Resource):
"""
Resource: Channel
"""
#--------------------------------------------------------------------------
# Public API
#--------------------------------------------------------------------------
def __after_init__(self):
return ("IpAssignment",)
def get_remote_name(self, name):
if len(self._interfaces) != 2:
return None
return next(x for x in self._interfaces if x.get_name() != name)
def get_sortable_name(self):
"""
This method is used to sort channel during IP assignment. This is
necessary to get the same IP configuration on the same experiment.
"""
ret = "{:03}".format(len(self.interfaces))
ret = ret + ''.join(sorted(map(lambda x : x.node.name, self.interfaces)))
return ret
def __create__(self):
interfaces = sorted(self.interfaces, key = lambda x : x.device_name)
if interfaces:
#IPv6
central6 = self._state.manager.by_type(Ipv6Assignment)[0]
prefix6_size = min(64, 128 - ceil(log(len(self.interfaces), 2)))
prefix6 = iter(central6.get_prefix(self, prefix6_size))
#IPv4
central4 = self._state.manager.by_type(Ipv4Assignment)[0]
prefix4_size = 32 - ceil(log(len(self.interfaces), 2))
prefix4 = iter(central4.get_prefix(self, prefix4_size))
for interface in interfaces:
try:
interface.ip4_address = next(prefix4)
except StopIteration as e:
import pdb; pdb.set_trace()
interface.ip6_address = next(prefix6)
interface.ip6_prefix = prefix6_size
return EmptyTask()
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