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# Copyright (c) 2016 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.
"""Robot framework variable file.
Create dictionary variable nodes_ipv4_addr of IPv4 addresses from
available networks.
"""
from ipaddress import IPv4Network
# Default list of IPv4 subnets
IPV4_NETWORKS = ['20.20.20.0/24',
'10.10.10.0/24',
'1.1.1.0/30']
class IPv4NetworkGenerator(object):
"""IPv4 network generator."""
def __init__(self, networks):
"""
:param networks: list of strings containing IPv4 subnet
with prefix length
"""
self._networks = list()
for network in networks:
net = IPv4Network(unicode(network))
subnet, _ = network.split('/')
self._networks.append((net, subnet))
if len(self._networks) == 0:
raise Exception('No IPv4 networks')
def next_network(self):
"""
:return: next network in form (IPv4Network, subnet)
"""
if len(self._networks):
return self._networks.pop()
else:
raise StopIteration()
def get_variables(networks=IPV4_NETWORKS[:]):
"""
Create dictionary of IPv4 addresses generated from provided subnet list.
Example of returned dictionary:
network = {
'NET1': {
'subnet': '192.168.1.0',
'prefix': 24,
'port1': {
'addr': '192.168.1.1',
},
'port2': {
'addr': '192.168.1.0',
},
},
'NET2': {
'subnet': '192.168.2.0',
'prefix': 24,
'port1': {
'addr': '192.168.2.1',
},
'port2': {
'addr': '192.168.2.2',
},
},
}
This function is called by RobotFramework automatically.
:param networks: list of subnets in form a.b.c.d/length
:return: Dictionary of IPv4 addresses
"""
net_object = IPv4NetworkGenerator(networks)
network = {}
interface_count_per_node = 2
for subnet_num in range(len(networks)):
net, net_str = net_object.next_network()
key = 'NET{}'.format(subnet_num + 1)
network[key] = {
'subnet': net_str,
'prefix': net.prefixlen,
}
hosts = net.hosts()
for port_num in range(interface_count_per_node):
port = 'port{}'.format(port_num + 1)
network[key][port] = {
'addr': str(next(hosts)),
}
return {'DICT__nodes_ipv4_addr': network}
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