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# Copyright (c) 2016 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 ssh import SSH
from robot.api import logger
__all__ = ['TrafficGenerator']
class TrafficGenerator(object):
def __init__(self):
self._result = None
self._loss = None
self._sent = None
self._received = None
def send_traffic_on(self, node, tx_port, rx_port, duration, rate,
framesize):
ssh = SSH()
ssh.connect(node)
(ret, stdout, stderr) = ssh.exec_command(
"sh -c 'cd MoonGen && sudo -S build/MoonGen "
"rfc2544/benchmarks/vpp-frameloss.lua --txport 0 --rxport 1 "
"--duration {0} --rate {1} --framesize {2}'".format(
duration, rate, framesize),
timeout=int(duration)+60)
logger.trace(ret)
logger.trace(stdout)
logger.trace(stderr)
for line in stdout.splitlines():
pass
self._result = line
logger.info('TrafficGen result: {0}'.format(self._result))
self._loss = self._result.split(', ')[3].split('=')[1]
return self._result
def no_traffic_loss_occured(self):
if self._loss is None:
raise Exception('The traffic generation has not been issued')
if self._loss != '0':
raise Exception('Traffic loss occured: {0}'.format(self._loss))
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