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diff --git a/GPL/traffic_profiles/trex/trex-sl-2n-ethip4udp-lb.py b/GPL/traffic_profiles/trex/trex-sl-2n-ethip4udp-lb.py
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+# Copyright (c) 2020 Intel 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.
+
+"""Stream profile for T-rex traffic generator.
+
+Stream profile:
+ - Packet: ETH / IP / UDP
+ - Direction 0 --> 1:
+ - Source IP address range: 192.168.50.74 - 192.168.50.79
+ - Destination IP address range: 90.1.2.1
+ - Direction 1 --> 0:
+ - Source IP address range: 192.168.60.74 - 192.168.60.79
+ - Destination IP address range: 192.168.50.74 - 192.168.50.79
+"""
+
+from trex.stl.api import *
+from profile_trex_stateless_base_class import TrafficStreamsBaseClass
+
+
+class TrafficStreams(TrafficStreamsBaseClass):
+ """Stream profile."""
+
+ def __init__(self):
+ """Initialization and setting of streams' parameters."""
+
+ super(TrafficStreamsBaseClass, self).__init__()
+
+ # IPs used in packet headers.
+ self.p1_src_start_ip = u"192.168.50.74"
+ self.p1_src_end_ip = u"192.168.50.79"
+ self.p1_dst_start_ip = u"90.1.2.1"
+
+ self.p2_src_start_ip = u"192.168.60.74"
+ self.p2_src_end_ip = u"192.168.60.79"
+ self.p2_dst_start_ip = u"192.168.50.74"
+ self.p2_dst_end_ip = u"192.168.50.79"
+
+ # UDP ports used in packet headers.
+ self.p1_src_udp_port = 63
+ self.p1_dst_udp_port = 20000
+
+ self.p2_src_udp_port = 3307
+ self.p2_dst_udp_port = 63
+
+ def define_packets(self):
+ """Defines the packets to be sent from the traffic generator.
+
+ Packet definition: | ETH | IP | UDP
+
+ :returns: Packets to be sent from the traffic generator.
+ :rtype: tuple
+ """
+
+ # Direction 0 --> 1
+ base_pkt_a = (
+ Ether() /
+ IP(
+ src=self.p1_src_start_ip,
+ dst=self.p1_dst_start_ip,
+ proto=17) /
+ UDP(
+ sport=self.p1_src_udp_port,
+ dport=self.p1_dst_udp_port
+ )
+ )
+ # Direction 1 --> 0
+ base_pkt_b = (
+ Ether() /
+ IP(
+ src=self.p2_src_start_ip,
+ dst=self.p2_dst_start_ip,
+ proto=17
+ ) /
+ UDP(
+ sport=self.p2_src_udp_port,
+ dport=self.p2_dst_udp_port
+ )
+ )
+
+ # Direction 0 --> 1
+ vm1 = STLScVmRaw(
+ [
+ STLVmFlowVar(
+ name=u"src",
+ min_value=self.p1_src_start_ip,
+ max_value=self.p1_src_end_ip,
+ size=4,
+ op=u"inc"
+ ),
+ STLVmWrFlowVar(
+ fv_name=u"src",
+ pkt_offset=u"IP.src"
+ ),
+ STLVmFixIpv4(
+ offset=u"IP"
+ )
+ ]
+ )
+ # Direction 1 --> 0
+ vm2 = STLScVmRaw(
+ [
+ STLVmFlowVar(
+ name=u"src",
+ min_value=self.p2_src_start_ip,
+ max_value=self.p2_src_end_ip,
+ size=4,
+ op=u"inc"
+ ),
+ STLVmWrFlowVar(
+ fv_name=u"src",
+ pkt_offset=u"IP.src"
+ ),
+ STLVmFlowVar(
+ name=u"dst",
+ min_value=self.p2_dst_start_ip,
+ max_value=self.p2_dst_end_ip,
+ size=4,
+ op=u"inc"
+ ),
+ STLVmWrFlowVar(
+ fv_name=u"dst",
+ pkt_offset=u"IP.dst"
+ ),
+ STLVmFixIpv4(
+ offset=u"IP"
+ )
+ ]
+ )
+ return base_pkt_a, base_pkt_b, vm1, vm2
+
+
+def register():
+ """Register this traffic profile to T-rex.
+
+ Do not change this function.
+
+ :return: Traffic streams.
+ :rtype: Object
+ """
+ return TrafficStreams()