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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 / TCP
- Direction 0 --> 1:
- Source IP address range: 192.168.0.0 - 192.168.255.255
- Destination IP address range: 20.0.0.0 - 20.0.255.255
- 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 TCP 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"192.168.255.255"
p1_dst_start_ip = u"20.0.0.0"
p1_dst_end_ip = u"20.0.255.255"
# Headers length, not sure why TRex needs 32B for segment header.
real_headers_size = 70 # 18B L2 + 20B IPv4 + 32B TCP.
trex_headers_size = real_headers_size - 12 # As if TCP header is 20B.
trex_mss = self.framesize - trex_headers_size
real_mss = trex_mss - 12 # TRex honors segment header+data limit.
data_size = self.n_data_frames * real_mss
# client commands
prog_c = ASTFProgram()
prog_c.connect()
prog_c.send(u"1" * data_size)
prog_c.recv(data_size)
# server commands
prog_s = ASTFProgram()
prog_s.accept()
prog_s.recv(data_size)
prog_s.send(u"1" * data_size)
# 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=4128768, # TODO: set via input parameter
port=8080,
)
temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
globinfo = ASTFGlobalInfo()
# Ensure correct data frame size.
globinfo.tcp.mss = trex_mss
# Ensure the whole transaction is a single burst (per direction).
globinfo.tcp.initwnd = self.n_data_frames
# Ensure buffers are large enough so starting window works.
globinfo.tcp.txbufsize = data_size
globinfo.tcp.rxbufsize = data_size
kwargs = dict(
default_c_glob_info=globinfo,
default_s_glob_info=globinfo,
)
return ip_gen, template, kwargs
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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