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# Copyright (c) 2020 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.
"""VPP Network Simulator Plugin util library."""
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
from resources.libraries.python.InterfaceUtil import InterfaceUtil
class NsimUtil():
"""VPP NSIM Plugin Keywords."""
@staticmethod
def configure_vpp_nsim(node, vpp_nsim_attr, interface0, interface1=None):
"""Configure nsim on the specified VPP node.
:param node: Topology node.
:param vpp_nsim_attr: VPP NSIM configuration attributes
:param interface0: Interface name.
:param interface1: 2nd Interface name for cross-connect feature
:type node: dict
:type vpp_nsim_attr: dict
:type interface0: str or int
:type interface1: str or int
:raises RuntimeError: if no NSIM features are enabled or
vpp papi command fails.
"""
host = node[u"host"]
if not vpp_nsim_attr[u"output_nsim_enable"] \
and not vpp_nsim_attr[u"xc_nsim_enable"]:
raise RuntimeError(f"No NSIM features enabled on host {host}:\n"
f"vpp_nsim_attr = {vpp_nsim_attr}")
cmd = u"nsim_configure"
args = dict(
delay_in_usec=vpp_nsim_attr[u"delay_in_usec"],
average_packet_size=vpp_nsim_attr[u"average_packet_size"],
bandwidth_in_bits_per_second=vpp_nsim_attr[
u"bw_in_bits_per_second"
],
packets_per_drop=vpp_nsim_attr[u"packets_per_drop"],
)
err_msg = f"Failed to configure NSIM on host {host}"
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
if vpp_nsim_attr[u"output_nsim_enable"]:
cmd = u"nsim_output_feature_enable_disable"
args = dict(
enable_disable=vpp_nsim_attr[u"output_nsim_enable"],
sw_if_index=InterfaceUtil.get_interface_index(node, interface0),
)
err_msg = f"Failed to enable NSIM output feature on " \
f"host {host} interface {interface0}"
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
elif vpp_nsim_attr[u"xc_nsim_enable"]:
cmd = u"nsim_cross_connect_feature_enable_disable"
args = dict(
enable_disable=vpp_nsim_attr[u"xc_nsim_enable"],
sw_if_index0=InterfaceUtil.get_interface_index(node,
interface0),
sw_if_index1=InterfaceUtil.get_interface_index(node,
interface1),
)
err_msg = f"Failed to enable NSIM output feature on " \
f"host {host} interface {interface0}"
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
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