73 lines
2.4 KiB
Python
73 lines
2.4 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development Company
|
|
#
|
|
# 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 netaddr
|
|
|
|
from tempest.lib import exceptions as lib_exc
|
|
|
|
|
|
def get_unused_ip_addresses(ports_client, subnets_client,
|
|
network_id, subnet_id, count):
|
|
"""Return a list with the specified number of unused IP addresses
|
|
|
|
This method uses the given ports_client to find the specified number of
|
|
unused IP addresses on the given subnet using the supplied subnets_client
|
|
"""
|
|
|
|
ports = ports_client.list_ports(network_id=network_id)['ports']
|
|
subnet = subnets_client.show_subnet(subnet_id)
|
|
ip_net = netaddr.IPNetwork(subnet['subnet']['cidr'])
|
|
subnet_set = netaddr.IPSet(ip_net.iter_hosts())
|
|
alloc_set = netaddr.IPSet()
|
|
|
|
# prune out any addresses already allocated to existing ports
|
|
for port in ports:
|
|
for fixed_ip in port.get('fixed_ips'):
|
|
alloc_set.add(fixed_ip['ip_address'])
|
|
|
|
# exclude gateway_ip of subnet
|
|
gateway_ip = subnet['subnet']['gateway_ip']
|
|
if gateway_ip:
|
|
alloc_set.add(gateway_ip)
|
|
|
|
av_set = subnet_set - alloc_set
|
|
addrs = []
|
|
for cidr in reversed(av_set.iter_cidrs()):
|
|
for ip in reversed(cidr):
|
|
addrs.append(str(ip))
|
|
if len(addrs) == count:
|
|
return addrs
|
|
msg = "Insufficient IP addresses available"
|
|
raise lib_exc.BadRequest(message=msg)
|
|
|
|
|
|
def get_ping_payload_size(mtu, ip_version):
|
|
"""Return the maximum size of ping payload that will fit into MTU."""
|
|
if not mtu:
|
|
return None
|
|
if ip_version == 4:
|
|
ip_header = 20
|
|
icmp_header = 8
|
|
else:
|
|
ip_header = 40
|
|
icmp_header = 4
|
|
res = mtu - ip_header - icmp_header
|
|
if res < 0:
|
|
raise lib_exc.BadRequest(
|
|
message='MTU = %(mtu)d is too low for IPv%(ip_version)d' % {
|
|
'mtu': mtu,
|
|
'ip_version': ip_version,
|
|
})
|
|
return res
|