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# Copyright (c) 2019 Viosoft Corporation
#
# 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 logging
import time
import socket
import yaml
import os
from yardstick.network_services.vnf_generic.vnf import sample_vnf
from yardstick.common import exceptions
LOG = logging.getLogger(__name__)
class PktgenHelper(object):
RETRY_SECONDS = 0.5
RETRY_COUNT = 20
CONNECT_TIMEOUT = 5
def __init__(self, host, port=23000):
self.host = host
self.port = port
self.connected = False
def _connect(self):
self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
ret = True
try:
self._sock.settimeout(self.CONNECT_TIMEOUT)
self._sock.connect((self.host, self.port))
except (socket.gaierror, socket.error, socket.timeout):
self._sock.close()
ret = False
return ret
def connect(self):
if self.connected:
return True
LOG.info("Connecting to pktgen instance at %s...", self.host)
for idx in range(self.RETRY_COUNT):
self.connected = self._connect()
if self.connected:
return True
LOG.debug("Connection attempt %d: Unable to connect to %s, " \
"retrying in %d seconds",
idx, self.host, self.RETRY_SECONDS)
time.sleep(self.RETRY_SECONDS)
LOG.error("Unable to connect to pktgen instance on %s !",
self.host)
return False
def send_command(self, command):
if not self.connected:
LOG.error("Pktgen socket is not connected")
return False
try:
self._sock.sendall((command + "\n").encode())
time.sleep(1)
except (socket.timeout, socket.error):
LOG.error("Error sending command '%s'", command)
return False
return True
class VcmtsPktgenSetupEnvHelper(sample_vnf.SetupEnvHelper):
BASE_PARAMETERS = "export LUA_PATH=/vcmts/Pktgen.lua;"\
+ "export CMK_PROC_FS=/host/proc;"
PORTS_COUNT = 8
def generate_pcap_filename(self, port_cfg):
return port_cfg['traffic_type'] + "_" + port_cfg['num_subs'] \
+ "cms_" + port_cfg['num_ofdm'] + "ofdm.pcap"
def find_port_cfg(self, ports_cfg, port_name):
for port_cfg in ports_cfg:
if port_name in port_cfg:
return port_cfg
return None
def build_pktgen_parameters(self, pod_cfg):
ports_cfg = pod_cfg['ports']
port_cfg = list()
for i in range(self.PORTS_COUNT):
port_cfg.append(self.find_port_cfg(ports_cfg, 'port_' + str(i)))
pktgen_parameters = self.BASE_PARAMETERS + " " \
+ " /pktgen-config/setup.sh " + pod_cfg['pktgen_id'] \
+ " " + pod_cfg['num_ports']
for i in range(self.PORTS_COUNT):
pktgen_parameters += " " + port_cfg[i]['net_pktgen']
for i in range(self.PORTS_COUNT):
pktgen_parameters += " " + self.generate_pcap_filename(port_cfg[i])
return pktgen_parameters
def start_pktgen(self, pod_cfg):
self.ssh_helper.drop_connection()
cmd = self.build_pktgen_parameters(pod_cfg)
LOG.debug("Executing: '%s'", cmd)
self.ssh_helper.send_command(cmd)
LOG.info("Pktgen executed")
def setup_vnf_environment(self):
pass
class VcmtsPktgen(sample_vnf.SampleVNFTrafficGen):
TG_NAME = 'VcmtsPktgen'
APP_NAME = 'VcmtsPktgen'
RUN_WAIT = 4
DEFAULT_RATE = 8.0
PKTGEN_BASE_PORT = 23000
def __init__(self, name, vnfd, setup_env_helper_type=None,
resource_helper_type=None):
if setup_env_helper_type is None:
setup_env_helper_type = VcmtsPktgenSetupEnvHelper
super(VcmtsPktgen, self).__init__(
name, vnfd, setup_env_helper_type, resource_helper_type)
self.pktgen_address = vnfd['mgmt-interface']['ip']
LOG.info("Pktgen container '%s', IP: %s", name, self.pktgen_address)
def extract_pod_cfg(self, pktgen_pods_cfg, pktgen_id):
for pod_cfg in pktgen_pods_cfg:
if pod_cfg['pktgen_id'] == pktgen_id:
return pod_cfg
return None
def instantiate(self, scenario_cfg, context_cfg):
super(VcmtsPktgen, self).instantiate(scenario_cfg, context_cfg)
self._start_server()
options = scenario_cfg.get('options', {})
self.pktgen_rate = options.get('pktgen_rate', self.DEFAULT_RATE)
try:
pktgen_values_filepath = options['pktgen_values']
except KeyError:
raise KeyError("Missing pktgen_values key in scenario options" \
"section of the task definition file")
if not os.path.isfile(pktgen_values_filepath):
raise RuntimeError("The pktgen_values file path provided " \
"does not exists")
# The yaml_loader.py (SafeLoader) underlying regex has an issue
# with reading PCI addresses (processed as double). so the
# BaseLoader is used here.
with open(pktgen_values_filepath) as stream:
pktgen_values = yaml.load(stream, Loader=yaml.BaseLoader)
if pktgen_values == None:
raise RuntimeError("Error reading pktgen_values file provided (" +
pktgen_values_filepath + ")")
self.pktgen_id = int(options[self.name]['pktgen_id'])
self.resource_helper.pktgen_id = self.pktgen_id
self.pktgen_helper = PktgenHelper(self.pktgen_address,
self.PKTGEN_BASE_PORT + self.pktgen_id)
pktgen_pods_cfg = pktgen_values['topology']['pktgen_pods']
self.pod_cfg = self.extract_pod_cfg(pktgen_pods_cfg,
str(self.pktgen_id))
if self.pod_cfg == None:
raise KeyError("Pktgen with id " + str(self.pktgen_id) + \
" was not found")
self.setup_helper.start_pktgen(self.pod_cfg)
def run_traffic(self, traffic_profile):
if not self.pktgen_helper.connect():
raise exceptions.PktgenActionError(command="connect")
LOG.info("Connected to pktgen instance at %s", self.pktgen_address)
commands = []
for i in range(self.setup_helper.PORTS_COUNT):
commands.append('pktgen.set("' + str(i) + '", "rate", ' +
"%0.1f" % self.pktgen_rate + ');')
commands.append('pktgen.start("all");')
for command in commands:
if self.pktgen_helper.send_command(command):
LOG.debug("Command '%s' sent to pktgen", command)
LOG.info("Traffic started on %s...", self.name)
return True
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