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# Copyright (c) 2022 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.
"""Traffic profile for T-rex advanced stateful (astf) traffic generator.
Traffic profile:
- Two streams sent in directions 0 --> 1 (client -> server, requests) and
1 --> 0 (server -> client, responses) at the same time.
- Packet: ETH / IP / UDP
- Direction 0 --> 1:
- Source IP address range: 192.168.0.0 - 192.168.3.255
- Destination IP address range: 20.0.0.0 - 20.0.3.255
- Direction 1 --> 0:
- Source IP address range: destination IP address from packet received
on port 1
- Destination IP address range: source IP address from packet received
on port 1
This is a profile for PPS tests, it combines UDP connect and data transfer.
No delays, server response waits for full request.
"""
from trex.astf.api import *
from profile_trex_astf_base_class import TrafficProfileBaseClass
class TrafficProfile(TrafficProfileBaseClass):
"""Traffic profile."""
def define_profile(self):
"""Define profile to be used by advanced stateful traffic generator.
This method MUST return:
return ip_gen, templates, None
:returns: IP generator and profile templates for ASTFProfile().
:rtype: tuple
"""
# IPs used in packet headers.
p1_src_start_ip = u"192.168.0.0"
p1_src_end_ip = u"192.168.3.255"
p1_dst_start_ip = u"20.0.0.0"
p1_dst_end_ip = u"20.0.3.255"
# The difference between data size and frame size.
headers_size = 46 # 18B L2 + 20B IPv4 + 8B UDP.
# TODO: Use the "connection protocol" from CPS traffic profile?
# Currently, the first data packet is all DUT sees about the session.
# Avoid sending keepalives.
m_delay = 2000000 # delay 2000s (2,000,000 ms)
# Data, not padded yet.
udp_data = u""
# Pad the data to achieve the intended frame size.
udp_data += self._gen_padding(headers_size)
# Safety check, the current programs send at least 1 packet.
if self.n_data_frames < 1:
raise RuntimeError("n_data_frames < 1: {self.n_data_frames}")
# Client program.
prog_c = ASTFProgram(stream=False)
prog_c.set_keepalive_msg(m_delay)
prog_c.set_var(u"var1", self.n_data_frames)
prog_c.set_label(u"a:")
prog_c.send_msg(udp_data)
prog_c.jmp_nz(u"var1", u"a:")
# We should read the server response,
# but no reason to overload client workers even more.
# Server program.
prog_s = ASTFProgram(stream=False)
prog_s.set_keepalive_msg(m_delay)
# If server closes too soon, new instances are started
# leading in too much replies. To prevent that, we need to recv all.
prog_s.recv_msg(self.n_data_frames)
# In packet loss scenarios, some instances never get here.
# This maybe increases server traffic duration,
# but no other way if we want to avoid
# TRex creating a second instance of the same server.
prog_s.set_var(u"var2", self.n_data_frames)
prog_s.set_label(u"b:")
prog_s.send_msg(udp_data)
prog_s.jmp_nz(u"var2", u"b:")
# VPP never duplicates packets,
# so it is safe to close the server instance now.
# ip generators
ip_gen_c = ASTFIPGenDist(
ip_range=[p1_src_start_ip, p1_src_end_ip],
distribution=u"seq",
)
ip_gen_s = ASTFIPGenDist(
ip_range=[p1_dst_start_ip, p1_dst_end_ip],
distribution=u"seq",
)
ip_gen = ASTFIPGen(
glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
dist_client=ip_gen_c,
dist_server=ip_gen_s,
)
# server association
s_assoc = ASTFAssociation(rules=ASTFAssociationRule(port=8080))
# template
temp_c = ASTFTCPClientTemplate(
program=prog_c,
ip_gen=ip_gen,
limit=64512, # TODO: Any benefit of making this configurable?
port=8080,
)
temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
return ip_gen, template, None
def register():
"""Register this traffic profile to T-Rex.
Do not change this function.
:return: Traffic Profiles.
:rtype: Object
"""
return TrafficProfile()
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