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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 / UDP
- Direction 0 --> 1:
- Source IP address range: 20.0.0.0 - 20.0.7.207
- Destination IP address range: 12.0.0.2
- Source UDP port range: 1024 - 1038
- Destination UDP port range: 1024
- Direction 1 --> 0:
- Source IP address range: 12.0.0.2
- Destination IP address range: 200.0.0.0
- Source UDP port range: 1024
- Destination UDP port range: 1024 - 31022
"""
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"20.0.0.0"
self.p1_src_end_ip = u"20.0.7.207"
self.p1_dst_start_ip = u"12.0.0.2"
self.p2_src_start_ip = u"12.0.0.2"
self.p2_src_end_ip = u"12.0.0.2"
self.p2_dst_start_ip = u"200.0.0.0"
# UDP ports used in packet headers.
self.p1_src_start_udp_port = 1024
self.p1_src_end_udp_port = 1038
self.p1_dst_start_udp_port = 1024
self.p2_src_start_udp_port = 1024
self.p2_dst_start_udp_port = 1024
self.p2_dst_end_udp_port = 31022
def define_packets(self):
"""Defines the packets to be sent from the traffic generator.
Packet definition: | ETH | IP | UDP |
:returns: Packets to be sent from the traffic generator.
:rtype: tuple
"""
# Direction 0 --> 1
base_pkt_a = (
Ether() /
IP(
src=self.p1_src_start_ip,
dst=self.p1_dst_start_ip,
proto=17
) /
UDP(
sport=self.p1_src_start_udp_port,
dport=self.p1_dst_start_udp_port
)
)
# Direction 1 --> 0
base_pkt_b = (
Ether() /
IP(
src=self.p2_src_start_ip,
dst=self.p2_dst_start_ip,
proto=17
) /
UDP(
sport=self.p2_src_start_udp_port,
dport=self.p2_dst_start_udp_port
)
)
# Direction 0 --> 1
vm1 = STLScVmRaw(
[
STLVmTupleGen(
ip_min=self.p1_src_start_ip,
ip_max=self.p1_src_end_ip,
port_min=self.p1_src_start_udp_port,
port_max=self.p1_src_end_udp_port,
name=u"tuple"
),
STLVmWrFlowVar(
fv_name=u"tuple.ip",
pkt_offset=u"IP.src"
),
STLVmFixIpv4(
offset=u"IP"
),
STLVmWrFlowVar(
fv_name=u"tuple.port",
pkt_offset=u"UDP.sport"
)
]
)
# Direction 0 --> 1
vm2 = STLScVmRaw(
[
STLVmFlowVar(
name=u"dport",
min_value=self.p2_dst_start_udp_port,
max_value=self.p2_dst_end_udp_port,
size=2,
op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"dport",
pkt_offset=u"UDP.dport"
)
]
)
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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