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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:
- One stream sent in directions 0 --> 1.
- Packet: ETH / IP / UDP
- Direction 0 --> 1:
- Source IP address range: 192.168.0.0 - 192.168.15.255
- Destination IP address range: 20.0.0.0 - 20.0.15.255
- Source UDP port range: 1024 - 1086
- Destination UDP port range: 8080
"""
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"192.168.0.0"
self.p1_src_end_ip = u"192.168.15.255"
self.p1_dst_start_ip = u"20.0.0.0"
self.p1_dst_end_ip = u"20.0.15.255"
# UDP ports used in packet headers.
self.p1_src_start_udp_port = 1024
self.p1_src_end_udp_port = 1086
self.p1_dst_start_udp_port = 8080
self.p1_dst_end_udp_port = 8080
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
)
)
base_pkt_b = (
Ether()
)
# Direction 0 --> 1
vm1 = STLVM()
vm1.var(name="sIP",
min_value=self.p1_src_start_ip,
max_value=self.p1_src_end_ip,
size=4,
op="inc",
next_var="sport")
vm1.var(name="sport",
min_value=self.p1_src_start_udp_port,
max_value=self.p1_src_end_udp_port,
size=2,
op="inc")
vm1.var(name="dIP",
min_value=self.p1_dst_start_ip,
max_value=self.p1_dst_end_ip,
size=4,
op="inc")
vm1.var(name="dport",
min_value=self.p1_dst_start_udp_port,
max_value=self.p1_dst_end_udp_port,
size=2,
op="inc")
vm1.write(fv_name="sIP", pkt_offset="IP.src")
vm1.write(fv_name="sport", pkt_offset="UDP.sport")
vm1.write(fv_name="dIP", pkt_offset="IP.dst")
vm1.write(fv_name="dport", pkt_offset="UDP.dport")
vm1.fix_chksum(offset='IP')
vm2 = STLVM()
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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