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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 / UDP
+ - 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, **kwargs):
+ """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"
+
+ 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 = 64512
+
+ 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()