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# Copyright (c) 2024 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.
"""Stream profile for T-rex traffic generator.
Stream profile:
- Three parallel bi-directional streams sent as W --> E and E --> W
at the same time.
- Packet: ETH / IP /
"""
from trex.stl.api import *
from profile_trex_stateless_scale_class import TrafficStreamsScaleClass
class TrafficStreams(TrafficStreamsScaleClass):
"""Stream profile."""
def __init__(self):
"""Initialization and setting of streams' parameters."""
super(TrafficStreamsScaleClass, self).__init__()
self.pkt_data = [
# Direction W --> E:
{
"src_start_ip": "10.0.0.1",
"dst_start_ip": "20.0.0.0",
"dst_end_ip": "20.15.66.63",
},
# Direction E --> W:
{
"src_start_ip": "20.0.0.1",
"dst_start_ip": "10.0.0.0",
"dst_end_ip": "10.15.66.63",
},
]
self.pkt_base = []
self.pkt_vm = []
def define_packets(self):
"""Defines the packets to be sent from the traffic generator.
Packet definition: | ETH | IP |
:returns: Base packets to be sent and transformation function.
:rtype: tuple
"""
for i in range(len(self.pkt_data)):
self.pkt_base.append(
Ether()
/ IP(
src=self.pkt_data[i]["src_start_ip"],
dst=self.pkt_data[i]["dst_start_ip"],
proto=61,
)
)
self.pkt_vm.append(
STLScVmRaw(
[
STLVmFlowVarRepeatableRandom(
name="dst",
min_value=self.pkt_data[i]["dst_start_ip"],
max_value=self.pkt_data[i]["dst_end_ip"],
size=4,
seed=i + 1,
limit=(2**24 - 1),
),
STLVmWrFlowVar(
fv_name="dst",
pkt_offset="IP.dst",
),
STLVmFixIpv4(
offset="IP",
),
]
)
)
return self.pkt_base, self.pkt_vm
def register():
"""Register this traffic profile to T-Rex.
Do not change this function.
:return: Traffic streams.
:rtype: Object
"""
return TrafficStreams()
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