# Copyright (c) 2021 Cisco and/or its affiliates. # # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later # # Licensed under the Apache License 2.0 or # GNU General Public License v2.0 or later; you may not use this file # except in compliance with one of these Licenses. You # may obtain a copy of the Licenses at: # # http://www.apache.org/licenses/LICENSE-2.0 # https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html # # Note: If this file is linked with Scapy, which is GPLv2+, your use of it # must be under GPLv2+. If at any point in the future it is no longer linked # with Scapy (or other GPLv2+ licensed software), you are free to choose # Apache 2. # # 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: - Two streams sent in directions 0 --> 1 and 1 --> 0 at the same time. - Direction 0 --> 1: - Packet: ETH / IP - Source IP address range: 10.128.1.0 - 10.128.1.255 - Destination IP address range: 10.0.1.0 - 10.0.1.255 - Direction 1 --> 0: - Packet: ETH / IP / UDP / GENEVE / ETH / IP - Outer Source IP address range: 1.1.1.1 - Outer Destination IP address range: 1.1.1.2 - Inner Source IP address range: 10.0.1.0 - 10.0.1.255 - Inner Destination IP address range: 10.128.1.0 - 10.128.1.255 - Source UDP port range: 1024 - 1279 - Destination UDP port range: 6081 """ from ctypes import c_int from ipaddress import IPv4Address from scapy.contrib.geneve import GENEVE 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__() # Nr. of GENEVE tunnels self.n_tunnels = 1 # VNIs used in GENEVE headers of Direction 1 --> 0. self.p2_geneve_start_vni = 1 # IPs used in packet headers of Direction 0 --> 1. self.p1_src_start_ip = u"10.128.1.0" self.p1_dst_start_ip = u"10.0.1.0" # IPs used in packet headers of Direction 1 --> 0. self.p2_outer_src_ip = u"1.1.1.1" self.p2_outer_dst_ip = u"1.1.1.2" self.p2_inner_src_start_ip = u"10.0.1.0" self.p2_inner_dst_start_ip = u"10.128.1.0" # MACs used in inner ethernet header of Direction 1 --> 0. self.p2_inner_dst_mac = u"d0:0b:ee:d0:00:00" # UDP ports used in packet headers of Direction 1 --> 0. self.p2_udp_sport_start = 1024 self.p2_udp_dport = 6081 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 """ p1_src_start_ip_int = int(IPv4Address(self.p1_src_start_ip)) p1_dst_start_ip_int = int(IPv4Address(self.p1_dst_start_ip)) p2_inner_src_start_ip_int = int(IPv4Address(self.p2_inner_src_start_ip)) p2_inner_dst_start_ip_int = int(IPv4Address(self.p2_inner_dst_start_ip)) # Direction 0 --> 1 base_pkt_a = ( Ether() / IP( src=self.p1_src_start_ip, dst=self.p1_dst_start_ip, proto=61 ) ) # Direction 1 --> 0 base_pkt_b = ( Ether() / IP( src=self.p2_outer_src_ip, dst=self.p2_outer_dst_ip, proto=17 ) / UDP( sport=self.p2_udp_sport_start, dport=self.p2_udp_dport ) / GENEVE(vni=self.p2_geneve_start_vni) / Ether(dst=self.p2_inner_dst_mac) / IP( src=self.p2_inner_src_start_ip, dst=self.p2_inner_dst_start_ip, proto=61 ) ) base_pkt_b /= Raw(load=self._gen_payload(110 - len(base_pkt_b))) # Direction 0 --> 1 vm1 = STLScVmRaw( [ STLVmFlowVar( name=u"ip_src", min_value=p1_src_start_ip_int, max_value=p1_src_start_ip_int + self.n_tunnels * 256 - 1, size=4, op=u"inc" ), STLVmWrFlowVar( fv_name=u"ip_src", pkt_offset=u"IP.src" ), STLVmFlowVar( name=u"ip_dst", min_value=p1_dst_start_ip_int, max_value=p1_dst_start_ip_int + self.n_tunnels * 256 - 1, size=4, op=u"inc" ), STLVmWrFlowVar( fv_name=u"ip_dst", pkt_offset=u"IP.dst" ), STLVmFixIpv4( offset=u"IP" ) ] ) # Direction 1 --> 0 vm2 = STLScVmRaw( [ STLVmFlowVar( name=u"ip", min_value=0, max_value=self.n_tunnels * 256 - 1, size=4, op=u"inc" ), STLVmWrMaskFlowVar( fv_name=u"ip", pkt_cast_size=4, mask=0xffffffff, add_value=p2_inner_src_start_ip_int, pkt_offset=u"IP:1.src" ), STLVmWrMaskFlowVar( fv_name=u"ip", pkt_cast_size=4, mask=0xffffffff, add_value=p2_inner_dst_start_ip_int, pkt_offset=u"IP:1.dst" ), STLVmWrMaskFlowVar( fv_name=u"ip", pkt_cast_size=2, mask=0xffff, add_value=self.p2_udp_sport_start, pkt_offset=u"UDP.sport" ), STLVmWrMaskFlowVar( fv_name=u"ip", pkt_cast_size=4, mask=0xffffff00, add_value=(self.p2_geneve_start_vni << 8), pkt_offset=u"GENEVE.vni" ), STLVmWrMaskFlowVar( fv_name=u"ip", pkt_cast_size=4, mask=0xffffff, shift=-8, offset_fixup=2, add_value=c_int( int( self.p2_inner_dst_mac.replace(u":", u"")[6:12], 16 ) << 8 ).value, pkt_offset=u"Ether:1.dst" ), STLVmFixIpv4( offset=u"IP:1" ), STLVmFixIpv4( offset=u"IP" ), STLVmFixChecksumHw( l3_offset=u"IP", l4_offset=u"UDP", l4_type=CTRexVmInsFixHwCs.L4_TYPE_UDP ) ] ) 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()