# 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: 172.16.0.0 - 172.19.255.255 - Destination IP address range: 20.16.0.0 - 20.19.255.255 - 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"172.16.0.0" p1_src_end_ip = u"172.19.255.255" p1_dst_start_ip = u"20.16.0.0" p1_dst_end_ip = u"20.19.255.255" # 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=16515072, # 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()