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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 Integer, String, Bool
from vicn.core.resource import Resource
from vicn.core.attribute import Attribute, Multiplicity
from vicn.core.exception import ResourceNotFound
from vicn.core.task import inline_task, BashTask, task
from vicn.core.task import EmptyTask
from vicn.resource.interface import Interface
from vicn.resource.linux.net_device import NonTapBaseNetDevice
from vicn.resource.vpp.vpp import VPP
from vicn.resource.vpp.vpp_commands import CMD_VPP_CREATE_IFACE
from vicn.resource.vpp.vpp_commands import CMD_VPP_SET_IP, CMD_VPP_SET_UP
class VPPInterface(Resource):
"""
Resource: VPPInterface
An interface representation in VPP
"""
vpp = Attribute(VPP,
description = 'Forwarder to which this interface belong to',
mandatory = True,
multiplicity = Multiplicity.ManyToOne,
key = True,
reverse_name = 'interfaces')
parent = Attribute(Interface, description = 'parent',
mandatory = True, reverse_name = 'vppinterface')
ip_address = Attribute(String)
prefix_len = Attribute(Integer, default = 31)
up = Attribute(Bool, description = 'Interface up/down status')
monitored = Attribute(Bool, default = True)
device_name = Attribute(String)
#--------------------------------------------------------------------------
# Resource lifecycle
#--------------------------------------------------------------------------
def __after__(self):
"""
We need CentralIP to get the parent interface IP address
"""
return ['CentralIP']
@inline_task
def __get__(self):
raise ResourceNotFound
def __create__(self):
# We must control what is the type of the parent netDevice (currently
# supported only veths, physical nics are coming)
create_task = EmptyTask()
# We must let the routing algorithm know that the parent interface
# belongs to vpp
self.parent.has_vpp_child = True
self.ip_address = self.parent.ip_address
self.up = True
if isinstance(self.parent,NonTapBaseNetDevice):
# Remove ip address in the parent device, it must only be set in
# the vpp interface otherwise vpp and the linux kernel will reply
# to non-icn request (e.g., ARP replies, port ureachable etc)
self.device_name = 'host-' + self.parent.device_name
create_task = BashTask(self.vpp.node, CMD_VPP_CREATE_IFACE,
{'vpp_interface': self},
lock = self.vpp.vppctl_lock)
self.parent.set('ip_address', None)
self.parent.set('offload', False)
self.parent.remote.set('offload', False)
elif self.parent.get_type() == 'dpdkdevice':
self.device_name = self.parent.device_name
else :
# Currently assume naively that everything else will be a physical
# NIC for VPP
#
# Before initialization, we need to make sure that the parent
# interface is down (vpp will control the nic)
self.device_name = 'host-' + self.parent.device_name
self.parent.set('up', False)
return create_task
#--------------------------------------------------------------------------
# Attributes
#--------------------------------------------------------------------------
def _set_ip_address(self):
if self.ip_address:
return BashTask(self.vpp.node, CMD_VPP_SET_IP, {'netdevice': self},
lock = self.vpp.vppctl_lock)
def _set_up(self):
return BashTask(self.vpp.node, CMD_VPP_SET_UP, {'netdevice': self},
lock = self.vpp.vppctl_lock)
@task
def _get_up(self):
return {'up' : False}
@task
def _get_ip_address(self):
return {'ip_address' : None}
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