18e2e2def5
This new class is used to read the link address from a network device. Partial-Bug: #1644878 Change-Id: Ieeaa1d3633b942e549c0513ca7360c0a91d10d04
86 lines
2.4 KiB
Python
86 lines
2.4 KiB
Python
# Copyright 2016 Cloudbase Solutions.
|
|
# All Rights Reserved.
|
|
#
|
|
# 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 netifaces
|
|
|
|
from oslo_log import log as logging
|
|
|
|
from neutron._i18n import _LE
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
OPTS = []
|
|
|
|
|
|
class IPWrapper(object):
|
|
|
|
def get_device_by_ip(self, ip):
|
|
if not ip:
|
|
return
|
|
|
|
for device in self.get_devices():
|
|
if device.device_has_ip(ip):
|
|
return device
|
|
|
|
def get_devices(self):
|
|
try:
|
|
return [IPDevice(iface) for iface in netifaces.interfaces()]
|
|
except (OSError, MemoryError):
|
|
LOG.error(_LE("Failed to get network interfaces."))
|
|
return []
|
|
|
|
|
|
class IPDevice(object):
|
|
|
|
def __init__(self, name):
|
|
self.name = name
|
|
self.link = IPLink(self)
|
|
|
|
def read_ifaddresses(self):
|
|
try:
|
|
device_addresses = netifaces.ifaddresses(self.name)
|
|
except ValueError:
|
|
LOG.error(_LE("The device does not exist on the system: %s."),
|
|
self.name)
|
|
return
|
|
except OSError:
|
|
LOG.error(_LE("Failed to get interface addresses: %s."),
|
|
self.name)
|
|
return
|
|
return device_addresses
|
|
|
|
def device_has_ip(self, ip):
|
|
device_addresses = self.read_ifaddresses()
|
|
if device_addresses is None:
|
|
return False
|
|
|
|
addresses = [ip_addr['addr'] for ip_addr in
|
|
device_addresses.get(netifaces.AF_INET, [])]
|
|
return ip in addresses
|
|
|
|
|
|
class IPLink(object):
|
|
|
|
def __init__(self, parent):
|
|
self._parent = parent
|
|
|
|
@property
|
|
def address(self):
|
|
device_addresses = self._parent.read_ifaddresses()
|
|
if device_addresses is None:
|
|
return False
|
|
return [eth_addr['addr'] for eth_addr in
|
|
device_addresses.get(netifaces.AF_LINK, [])]
|