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#!/usr/bin/python3
# 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.
"""This script uses T-REX advanced stateful 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.astf.api library
- Script must be executed on a node with T-REX instance
Functionality:
1. Stop any running traffic
2. Optionally restore reference counter values.
3. Return conter differences.
"""
import argparse
import json
import sys
from collections import OrderedDict # Needed to parse xstats representation.
sys.path.insert(
0, u"/opt/trex-core-2.73/scripts/automation/trex_control_plane/interactive/"
)
from trex.astf.api import *
def main():
"""Stop traffic if any is running. Report xstats."""
parser = argparse.ArgumentParser()
parser.add_argument(
u"--xstat0", type=str, default=u"",
help=u"Reference xstat object if any."
)
parser.add_argument(
u"--xstat1", type=str, default=u"",
help=u"Reference xstat object if any."
)
args = parser.parse_args()
client = ASTFClient()
try:
# connect to server
client.connect()
client.acquire(force=True)
client.stop()
# Read the stats after the test,
# we need to update values before the last trial started.
if args.xstat0:
snapshot = eval(args.xstat0)
client.ports[0].get_xstats().reference_stats = snapshot
if args.xstat1:
snapshot = eval(args.xstat1)
client.ports[1].get_xstats().reference_stats = snapshot
# Now we can call the official method to get differences.
xstats0 = client.get_xstats(0)
xstats1 = client.get_xstats(1)
# If TRexError happens, let the script fail with stack trace.
finally:
client.clear_profile()
client.disconnect()
# TODO: check xstats format
print(u"##### statistics port 0 #####")
print(json.dumps(xstats0, indent=4, separators=(u",", u": ")))
print(u"##### statistics port 1 #####")
print(json.dumps(xstats1, indent=4, separators=(u",", u": ")))
tx_0, rx_0 = xstats0[u"tx_good_packets"], xstats0[u"rx_good_packets"]
tx_1, rx_1 = xstats1[u"tx_good_packets"], xstats1[u"rx_good_packets"]
lost_a, lost_b = tx_0 - rx_1, tx_1 - rx_0
client_stats = xstats0[u"traffic"][u"client"]
server_stats = xstats1[u"traffic"][u"server"]
# Active and established flows UDP/TCP
# Client
c_act_flows = client_stats[u"m_active_flows"]
c_est_flows = client_stats[u"m_est_flows"]
l7_data = f"client_active_flows={c_act_flows}, "
l7_data += f"client_established_flows={c_est_flows}, "
# Server
s_act_flows = server_stats[u"m_active_flows"]
s_est_flows = server_stats[u"m_est_flows"]
l7_data += f"server_active_flows={s_act_flows}, "
l7_data += f"server_established_flows={s_est_flows}, "
# Some zero counters are not sent
# Client
# Established connections
c_udp_connects = client_stats.get(u"udps_connects", 0)
l7_data += f"client_udp_connects={c_udp_connects}, "
# Closed connections
c_udp_closed = client_stats.get(u"udps_closed", 0)
l7_data += f"client_udp_closed={c_udp_closed}, "
# Server
# Accepted connections
s_udp_accepts = server_stats.get(u"udps_accepts", 0)
l7_data += f"server_udp_accepts={s_udp_accepts}, "
# Closed connections
s_udp_closed = server_stats.get(u"udps_closed", 0)
# Client
# Initiated connections
c_tcp_connatt = client_stats.get(u"tcps_connattempt", 0)
l7_data += f"client_tcp_connect_inits={c_tcp_connatt}, "
# Established connections
c_tcp_connects = client_stats.get(u"tcps_connects", 0)
l7_data += f"client_tcp_connects={c_tcp_connects}, "
# Closed connections
c_tcp_closed = client_stats.get(u"tcps_closed", 0)
l7_data += f"client_tcp_closed={c_tcp_closed}, "
# Server
# Accepted connections
s_tcp_accepts = server_stats.get(u"tcps_accepts", 0)
l7_data += f"server_tcp_accepts={s_tcp_accepts}, "
# Established connections
s_tcp_connects = server_stats.get(u"tcps_connects", 0)
l7_data += f"server_tcp_connects={s_tcp_connects}, "
# Closed connections
s_tcp_closed = server_stats.get(u"tcps_closed", 0)
l7_data += f"server_tcp_closed={s_tcp_closed}, "
print(f"packets lost from 0 --> 1: {lost_a} pkts")
print(f"packets lost from 1 --> 0: {lost_b} pkts")
total_rcvd, total_sent = rx_0 + rx_1, tx_0 + tx_1
total_lost = total_sent - total_rcvd
# TODO: Add latency.
print(
f"cps='unknown', total_received={total_rcvd}, total_sent={total_sent}, "
f"frame_loss={total_lost}, "
f"latency_stream_0(usec)=-1/-1/-1, latency_stream_1(usec)=-1/-1/-1, "
u"latency_hist_stream_0={}, latency_hist_stream_1={}, "
f"{l7_data}"
)
if __name__ == u"__main__":
main()
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