# 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. """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: 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 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 __init__(self, **kwargs): """Initialization and setting of profile parameters.""" super(TrafficProfileBaseClass, self).__init__() # IPs used in packet headers. self.p1_src_start_ip = u"172.16.0.0" self.p1_src_end_ip = u"172.19.255.255" self.p1_dst_start_ip = u"20.16.0.0" self.p1_dst_end_ip = u"20.19.255.255" self.headers_size = 42 # 14B l2 + 20B ipv4 + 8B UDP self.udp_data = u"" self.n_data = 32 # TODO: set via input parameter self.m_delay = 1200000 # delay 1200s (1,200,000 ms) self.u_delay = 1000 * self.m_delay # delay 1200s (1,200,000,000 us) self.limit = 16515072 def define_profile(self): """Define profile to be used by advanced stateful traffic generator. This method MUST return: return ip_gen, templates :returns: IP generator and profile templates for ASTFProfile(). :rtype: tuple """ if self.framesize == 64: self.udp_data += self._gen_padding(self.headers_size, 72) if self.framesize == 1518: self.udp_data += self._gen_padding(self.headers_size, 1514) # Client program. prog_c = ASTFProgram(stream=False) prog_c.set_keepalive_msg(self.m_delay) prog_c.send_msg(self.udp_data) # No delay, PPS tests combine connect and data send (no data receive). prog_c.set_var(u"var1", self.n_data) prog_c.set_label(u"a:") prog_c.send_msg(self.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(self.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(1 + self.n_data) # 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.send_msg(self.udp_data) prog_s.set_var(u"var2", self.n_data) prog_s.set_label(u"b:") prog_s.send_msg(self.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=[self.p1_src_start_ip, self.p1_src_end_ip], distribution=u"seq" ) ip_gen_s = ASTFIPGenDist( ip_range=[self.p1_dst_start_ip, self.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=self.limit, 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()