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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.
#
import pyparsing as pp
from netmodel.model.key import Key
from netmodel.model.type import Integer, String, Bool
from netmodel.model.type import Inet4Address, Inet6Address
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 inherit_parent
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, CMD_VPP_CREATE_MEMIFACE
from vicn.resource.vpp.vpp_commands import CMD_VPP_SET_IP, CMD_VPP_SET_UP
from vicn.resource.vpp.memif_device import MemifDevice
GREP_MEMIF_INFO = 'vppctl_wrapper show memif | grep interface --no-group-separator -A 1'
def parse_memif(rv, vppinterface):
kw_interface = pp.CaselessKeyword('interface')
kw_key = pp.CaselessKeyword('key')
kw_file = pp.CaselessKeyword('file')
kw_listener = pp.CaselessKeyword('listener')
kw_connfd = pp.CaselessKeyword('conn-fd')
kw_intfd = pp.CaselessKeyword('int-fd')
kw_ringsize = pp.CaselessKeyword('ring-size')
kw_numc2srings = pp.CaselessKeyword('num-c2s-rings')
kw_nums2crings = pp.CaselessKeyword('num-s2c-rings')
kw_buffersize = pp.CaselessKeyword('buffer_size')
r_path = ' *(/[a-zA-Z0-9_\-]*)*\.[a-zA-Z0-9_\-]*'
r_id = ' *-+[0-9]*'
single = kw_interface.suppress() + pp.Word(pp.alphanums).setResultsName('interface') + \
kw_key.suppress() + pp.Word(pp.alphanums).setResultsName('key') + \
kw_file.suppress() + pp.Regex(r_path).setResultsName('path') # + \
# kw_listener.suppress() + pp.Word(pp.alphanums).setResultsName('listener') + \
# kw_connfd.suppress() + pp.Regex(r_id).setResultsName('conn-fd') + \
# kw_intfd.suppress() + pp.Regex(r_id).setResultsName('int-fd') + \
# kw_ringsize.suppress() + pp.Word(pp.nums).setResultsName('ring-size') + \
# kw_numc2srings.suppress() + pp.Word(pp.nums).setResultsName('num-c2s-rings') + \
# kw_nums2crings.suppress() + pp.Word(pp.nums).setResultsName('num-s2c-rings') + \
# kw_buffersize.suppress() + pp.Word(pp.nums).setResultsName('buffer-size')
multiple = pp.OneOrMore(pp.Group(single))
results = multiple.parseString(rv.stdout)
for interface in results:
if interface['path'] == vppinterface.parent.path_unix_socket + vppinterface.parent.socket_name:
vppinterface.device_name = interface['interface']
vppinterface.parent.device_name = interface['interface']
return vppinterface.device_name
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,
reverse_name = 'interfaces')
parent = Attribute(Interface, description = 'parent',
mandatory = True, reverse_name = 'vppinterface')
ip4_address = Attribute(Inet4Address)
ip6_address = Attribute(Inet6Address)
up = Attribute(Bool, description = 'Interface up/down status')
monitored = Attribute(Bool, default = True)
device_name = Attribute(String)
__key__ = Key(vpp, Resource.name)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
#--------------------------------------------------------------------------
# Resource lifecycle
#--------------------------------------------------------------------------
def __after__(self):
"""
We need CentralIP to get the parent interface IP address
"""
return ['CentralIP']
@inherit_parent
@inline_task
def __get__(self):
raise ResourceNotFound
@inherit_parent
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.up = True
if isinstance(self.parent, MemifDevice):
#TODO: add output parsing to get the interface name
create_task = BashTask(self.vpp.node, CMD_VPP_CREATE_MEMIFACE, {
'key': hex(self.parent.key),
'vpp_interface': self,
'master_slave': 'master' if self.parent.master else 'slave'},
lock = self.vpp.vppctl_lock)
fill_name = BashTask(self.vpp.node, GREP_MEMIF_INFO,
parse = (lambda x, y=self : parse_memif(x, y)),
lock = self.vpp.vppctl_lock)
create_task = create_task > fill_name
elif 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.ip4_address = self.parent.ip4_address
self.ip6_address = self.parent.ip6_address
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('ip4_address', None)
self.parent.set('ip6_address', None)
self.parent.set('offload', False)
self.parent.remote.set('offload', False)
elif self.parent.get_type() == 'dpdkdevice':
self.ip4_address = self.parent.ip4_address
self.ip6_address = self.parent.ip6_address
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_ip4_address(self):
if self.ip4_address:
return BashTask(self.vpp.node, CMD_VPP_SET_IP, {
'device_name': self.device_name,
'ip_address': str(self.ip4_address),
'prefix_len': self.ip4_address.prefix_len},
lock = self.vpp.vppctl_lock)
def _set_ip6_address(self):
if self.ip6_address:
return BashTask(self.vpp.node, CMD_VPP_SET_IP, {
'device_name': self.device_name,
'ip_address': str(self.ip6_address),
'prefix_len': self.ip6_address.prefix_len},
lock = self.vpp.vppctl_lock)
def _set_up(self):
state = 'up' if self.up else 'down'
return BashTask(self.vpp.node, CMD_VPP_SET_UP, {
'netdevice': self,
'state': state},
lock = self.vpp.vppctl_lock)
@task
def _get_up(self):
return {'up' : False}
@task
def _get_ip4_address(self):
return {'ip4_address' : None}
@task
def _get_ip6_address(self):
return {'ip6_address' : None}
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