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#!/usr/bin/python3
# Copyright (c) 2023 Cisco and/or its affiliates.
#
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
#
# Licensed under the Apache License 2.0 or
# GNU General Public License v2.0 or later; you may not use this file
# except in compliance with one of these Licenses. You
# may obtain a copy of the Licenses at:
#
# http://www.apache.org/licenses/LICENSE-2.0
# https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
#
# Note: If this file is linked with Scapy, which is GPLv2+, your use of it
# must be under GPLv2+. If at any point in the future it is no longer linked
# with Scapy (or other GPLv2+ licensed software), you are free to choose
# Apache 2.
#
# 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.
"""This script uses T-REX stateless API to drive t-rex instance.
Requirements:
- T-REX: https://github.com/cisco-system-traffic-generator/trex-core
- compiled and running T-REX process (eg. ./t-rex-64 -i)
- trex.stl.api library
- Script must be executed on a node with T-REX instance
"""
import argparse
import json
import sys
from collections import OrderedDict # Needed to parse xstats representation.
sys.path.insert(
0, "/opt/trex-core-3.03/scripts/automation/trex_control_plane/interactive/"
)
from trex.stl.api import STLClient
def main():
"""Stop traffic if any is running. Report xstats."""
parser = argparse.ArgumentParser()
parser.add_argument(
"--xstat", type=str, nargs="*", help="Reference xstat object if any."
)
args = parser.parse_args()
client = STLClient()
try:
client.connect()
client.acquire(force=True)
client.stop()
xstats = list()
# Read the stats after the test,
# we need to update values before the last trial started.
for i in range(len(client.ports)):
if args.xstat[i]:
snapshot = eval(args.xstat[i])
client.ports[i].get_xstats().reference_stats = snapshot
# Now we can call the official method to get differences.
xstats.append(client.get_xstats(i))
print(f"##### statistics port {i} #####")
print(json.dumps(xstats[i], indent=4, separators=(",", ": ")))
finally:
client.disconnect()
for idx,stat in enumerate(zip(xstats[0::2], xstats[1::2])):
lost_r = stat[0]["tx_good_packets"] - stat[1]["rx_good_packets"]
lost_l = stat[1]["tx_good_packets"] - stat[0]["rx_good_packets"]
print(f"packets lost from {idx*2} --> {idx*2+1}: {lost_r} pkts")
print(f"packets lost from {idx*2+1} --> {idx*2}: {lost_l} pkts")
total_rcvd = 0
total_sent = 0
for stat in xstats:
total_rcvd += stat["rx_good_packets"]
total_sent += stat["tx_good_packets"]
print(
f"rate='unknown'; "
f"total_received={total_rcvd}; "
f"total_sent={total_sent}; "
f"frame_loss={total_sent - total_rcvd}; "
f"target_duration='manual'; "
f"approximated_duration='manual'; "
f"approximated_rate='unknown'; "
f"latency_stream_0(usec)=-1/-1/-1; "
f"latency_stream_1(usec)=-1/-1/-1; "
)
if __name__ == "__main__":
main()
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