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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 - 192.168.255.255
- Destination IP address range: 20.0.0.0 - 20.0.255.255
- 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"192.168.255.255"
self.p1_dst_start_ip = u"20.0.0.0"
self.p1_dst_end_ip = u"20.0.255.255"
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 = 4128768
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()
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