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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.key import Key
from netmodel.model.type import Bool, String, Integer
from netmodel.model.type import Inet4Address, Inet6Address
from vicn.core.attribute import Attribute
from vicn.resource.interface import Interface
from vicn.resource.lxd.lxc_container import CMD_MOUNT_FOLDER
from vicn.resource.linux.folder import Folder
from vicn.core.task import inline_task, BashTask
from vicn.core.task import inherit_parent
from vicn.core.exception import ResourceNotFound
from vicn.core.address_mgr import AddressManager
class MemifDevice(Interface):
"""
Resource: Memory interface device
A MemifDevice is device build on top of a the memory interface provided by vpp.
It uses a unix socket to connect the two vpp-s (one master and one slave).
The unix socket must be shared between the two vpp-s.
"""
path_unix_socket = Attribute(String,
mandatory = True,
description = 'Path to the shared folder holding the unix socket')
socket_name = Attribute(String,
mandatory = True,
description = 'Path to the shared folder holding the unix socket')
folder_host = Attribute(Folder,
mandatory = True,
description = 'Folder in the host to be mounted in the container ih path_unix_socket')
master= Attribute(Bool,
description = 'True if this interface is connected to the master vpp',
default = False)
# We need to automatically assign a mac address to the memif so that we can
# recreate it after vpp reboots thanks to a config file or bash script.
# Just reading the actual value would not work since we need to use an
# external script and this mac address would thus not be prevent in the list
# of executed commands.
mac_address = Attribute(String, description = 'Mac address of the device',
default = lambda self: AddressManager().get_mac(self))
ip4_address = Attribute(Inet4Address, description = "Device's IP address")
ip6_address = Attribute(Inet6Address, description = "Device's IP address")
device_name = Attribute(String)
key = Attribute(Integer)
__key__ = Key(folder_host)
@inline_task
def __get__(self):
raise ResourceNotFound
@inherit_parent
def __create__(self):
return BashTask(self.node.node_with_kernel, CMD_MOUNT_FOLDER, {
'container': self.node,
'device-name': self.socket_name,
'host_path': self.folder_host.foldername,
'container_path': self.path_unix_socket}, output=True,
lock=self.node.vpp.memif_lock)
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