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# Copyright (c) 2023 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 - 10.128.4.255
- Destination IP address range: 10.0.1.0 - 10.0.4.255
- 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 - 10.0.4.255
- Inner Destination IP address range: 10.128.1.0 - 10.128.4.255
- Source UDP port range: 1024 - 2047
- 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 = 4
# 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()
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