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+# 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 / TCP
+ - 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
+"""
+
+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"192.168.3.255"
+ self.p1_dst_start_ip = u"20.0.0.0"
+ self.p1_dst_end_ip = u"20.0.3.255"
+
+ # Headers length; not used in this profile, just for the record of
+ # header length for TCP packet with 0B payload
+ self.headers_size = 58 # 14B l2 + 20B ipv4 + 24B tcp incl. 4B options
+
+ # Delay for keeping tcp sessions active
+ self.delay = 2000000 # delay 2s (2,000,000 usec)
+
+ 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
+ """
+ # client commands
+ prog_c = ASTFProgram()
+ # send syn
+ prog_c.connect()
+ # receive syn-ack (0B sent in tcp syn-ack packet) and send ack
+ prog_c.recv(0)
+ # wait defined time, then send fin-ack
+ prog_c.delay(self.delay)
+
+ # server commands
+ prog_s = ASTFProgram()
+ # receive syn, send syn-ack
+ prog_s.accept()
+ # receive fin-ack, send ack + fin-ack
+ prog_s.wait_for_peer_close()
+
+ # 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=64512, # 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()