# 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: 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 """ from trex.astf.api import * from profile_trex_astf_base_class import TrafficProfileBaseClass class TrafficProfile(TrafficProfileBaseClass): """Traffic profile.""" def __init__(self): """Initialization and setting of profile parameters.""" super(TrafficProfileBaseClass, self).__init__() # IPs used in packet headers. self.p1_src_start_ip = u"192.168.0.0" self.p1_src_end_ip = u"192.168.255.255" self.p1_dst_start_ip = u"20.0.0.0" self.p1_dst_end_ip = u"20.0.255.255" # UDP messages self.udp_req = u"GET" self.udp_res = u"ACK" # Headers length self.headers_size = 42 # 14B l2 + 20B ipv4 + 8B udp # Required UDP keepalive value for T-Rex self.udp_keepalive = 2000 # 2s (2,000 msec) 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 ASTFProfile(). :rtype: tuple """ self.udp_req += self._gen_padding(self.headers_size + len(self.udp_req)) self.udp_res += self._gen_padding(self.headers_size + len(self.udp_res)) # client commands prog_c = ASTFProgram(stream=False) # set the keepalive timer for UDP flows to not close udp session # immediately after packet exchange prog_c.set_keepalive_msg(self.udp_keepalive) # send REQ message prog_c.send_msg(self.udp_req) # receive RES message prog_c.recv_msg(1) prog_c.delay(self.udp_keepalive * 1000) # delay is defined in usec # server commands prog_s = ASTFProgram(stream=False) # set the keepalive timer for UDP flows to not close udp session # immediately after packet exchange prog_c.set_keepalive_msg(self.udp_keepalive) # receive REQ message prog_s.recv_msg(1) # send RES message prog_s.send_msg(self.udp_res) prog_s.delay(self.udp_keepalive * 1000) # delay is defined in usec # 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=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) 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()