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# 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.
"""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 / IP /
- Direction 0 --> 1:
- Destination MAC address: 52:54:00:00:nf_id:01
- Source IP address range: 10.10.10.1 - 10.10.10.254
- Destination IP address range: 20.20.20.1
- Direction 1 --> 0:
- Destination MAC address: 52:54:00:00:nf_id:02
- Source IP address range: 20.20.20.1 - 20.20.20.254
- Destination IP address range: 10.10.10.1
"""
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__()
# Service density parameters.
self.nf_chains = 2
self.nf_nodes = 1
# MACs used in packet headers.
self.p1_dst_start_mac = u"52:54:00:00:00:01"
self.p2_dst_start_mac = u"52:54:00:00:00:02"
# IPs used in packet headers.
self.p1_src_start_ip = u"10.10.10.1"
self.p1_src_end_ip = u"10.10.10.254"
self.p1_dst_start_ip = u"20.20.20.1"
self.p2_src_start_ip = u"20.20.20.1"
self.p2_src_end_ip = u"20.20.20.254"
self.p2_dst_start_ip = u"10.10.10.1"
def define_packets(self):
"""Defines the packets to be sent from the traffic generator.
Packet definition: | ETH | IP |
:returns: Packets to be sent from the traffic generator.
:rtype: tuple
"""
# Direction 0 --> 1
base_pkt_a = (
Ether(
dst=self.p1_dst_start_mac
) /
IP(
src=self.p1_src_start_ip,
dst=self.p1_dst_start_ip,
proto=61
)
)
# Direction 1 --> 0
base_pkt_b = (
Ether(
dst=self.p2_dst_start_mac
) /
IP(
src=self.p2_src_start_ip,
dst=self.p2_dst_start_ip,
proto=61
)
)
# Direction 0 --> 1
vm1 = STLScVmRaw(
[
STLVmFlowVar(
name=u"mac_dst",
min_value=1,
max_value=self.nf_chains*self.nf_nodes,
size=1,
step=self.nf_nodes,
op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"mac_dst",
pkt_offset=4
),
STLVmFlowVar(
name=u"src",
min_value=self.p1_src_start_ip,
max_value=self.p1_src_end_ip,
size=4,
op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"src",
pkt_offset=u"IP.src"
),
STLVmFixIpv4(
offset=u"IP"
)
]
)
# Direction 1 --> 0
vm2 = STLScVmRaw(
[
STLVmFlowVar(
name=u"mac_dst",
min_value=self.nf_nodes,
max_value=self.nf_chains*self.nf_nodes,
size=1,
step=self.nf_nodes,
op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"mac_dst",
pkt_offset=4
),
STLVmFlowVar(
name=u"src",
min_value=self.p2_src_start_ip,
max_value=self.p2_src_end_ip,
size=4,
op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"src",
pkt_offset=u"IP.src"
),
STLVmFixIpv4(
offset=u"IP"
)
]
)
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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