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# Copyright (c) 2021 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.
"""IPv6 utilities library."""
from resources.libraries.python.InterfaceUtil import InterfaceUtil
from resources.libraries.python.IPUtil import IPUtil
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
from resources.libraries.python.topology import NodeType
class IPv6Util:
"""IPv6 utilities"""
@staticmethod
def vpp_interface_ra_suppress(node, interface):
"""Disable sending ICMPv6 router-advertisement messages on
an interface on a VPP node.
:param node: VPP node.
:param interface: Interface name.
:type node: dict
:type interface: str
"""
cmd = u"sw_interface_ip6nd_ra_config"
args = dict(
sw_if_index=InterfaceUtil.get_interface_index(node, interface),
suppress=1
)
err_msg = f"Failed to disable sending ICMPv6 router-advertisement " \
f"messages on interface {interface}"
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
@staticmethod
def vpp_ra_send_after_interval(node, interface, interval=2):
"""Setup vpp router advertisement(RA) in such way it sends RA packet
after every interval value.
:param node: VPP node.
:param interface: Interface name.
:param interval: Interval in seconds for RA resend.
:type node: dict
:type interface: str
:type interval: int
"""
cmd = u"sw_interface_ip6nd_ra_config"
args = dict(
sw_if_index=InterfaceUtil.get_interface_index(node, interface),
initial_interval=int(interval)
)
err_msg = f"Failed to set router advertisement interval " \
f"on interface {interface}"
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
@staticmethod
def vpp_interfaces_ra_suppress_on_all_nodes(nodes):
"""Disable sending ICMPv6 router-advertisement messages on all
IPv6 enabled interfaces on all VPP nodes in the topology.
:param nodes: Nodes of the test topology.
:type nodes: dict
"""
for node in nodes.values():
if node[u"type"] == NodeType.TG:
continue
for port_k in node[u"interfaces"].keys():
ip6_addr_list = IPUtil.vpp_get_interface_ip_addresses(
node, port_k, u"ipv6"
)
if ip6_addr_list:
IPv6Util.vpp_interface_ra_suppress(node, port_k)
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