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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:
- Two streams sent in directions 0 --> 1 and 1 --> 0 at the same time.
- Packet: ETH / IPv6 /
- Direction 0 --> 1:
- Source IP address range: 2001:1::1
- Destination IP address range: 2001:2::0 - 2001:2::270F
- Direction 1 --> 0:
- Source IP address range: 2001:2::1
- Destination IP address range: 2001:1::0 - 2001:1::270F
"""
from trex.stl.api import *
from profile_trex_stateless_base_class import TrafficStreamsBaseClass
class TrafficStreams(TrafficStreamsBaseClass):
"""Stream profile."""
def __init__(self):
"""Initialization and setting of streams' parameters."""
super(TrafficStreamsBaseClass, self).__init__()
# IPs used in packet headers.
self.p1_src_start_ip = u"2001:1::1"
self.p1_dst_start_ip = u"2001:2::0"
self.p1_dst_end_ip = u"2001:2::270F"
self.p2_src_start_ip = u"2001:2::1"
self.p2_dst_start_ip = u"2001:1::0"
self.p2_dst_end_ip = u"2001:1::270F"
def define_packets(self):
"""Defines the packets to be sent from the traffic generator.
Packet definition: | ETH | IPv6 |
:returns: Packets to be sent from the traffic generator.
:rtype: tuple
"""
base_p1, count_p1 = self._get_start_end_ipv6(
self.p1_dst_start_ip,
self.p1_dst_end_ip
)
base_p2, count_p2 = self._get_start_end_ipv6(
self.p2_dst_start_ip,
self.p2_dst_end_ip
)
# Direction 0 --> 1
base_pkt_a = (
Ether() /
IPv6(
src=self.p1_src_start_ip,
dst=self.p1_dst_start_ip
)
)
# Direction 1 --> 0
base_pkt_b = (
Ether() /
IPv6(
src=self.p2_src_start_ip,
dst=self.p2_dst_start_ip
)
)
# Direction 0 --> 1
vm1 = STLScVmRaw(
[
STLVmFlowVarRepeatableRandom(
name=u"ipv6_dst",
min_value=base_p1,
max_value=base_p1 + count_p1,
size=8,
seed=1,
# Cycle length. TRex does not allow any higher value.
limit=(2**24 - 1)
),
STLVmWrFlowVar(
fv_name=u"ipv6_dst",
pkt_offset=u"IPv6.dst",
offset_fixup=8
)
]
)
# Direction 1 --> 0
vm2 = STLScVmRaw(
[
STLVmFlowVarRepeatableRandom(
name=u"ipv6_dst",
min_value=base_p2,
max_value=base_p2 + count_p2,
size=8,
seed=2,
limit=(2**24 - 1)
),
STLVmWrFlowVar(
fv_name=u"ipv6_dst",
pkt_offset=u"IPv6.dst",
offset_fixup=8
)
]
)
return base_pkt_a, base_pkt_b, vm1, vm2
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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