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"""Stream profile for T-rex traffic generator.
Stream profile:
- Two streams sent in directions 0 --> 1 and 1 --> 0 at the same time.
- Packet: ETH / IP /
- Direction 0 --> 1:
- Source IP address range: 10.0.0.1
- Destination IP address range: 20.0.0.0 - 20.15.66.63
- Direction 1 --> 0:
- Source IP address range: 20.0.0.1
- Destination IP address range: 10.0.0.0 - 10.15.66.63
"""
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"10.0.0.1"
self.p1_dst_start_ip = u"20.0.0.0"
self.p1_dst_end_ip = u"20.15.66.63"
self.p2_src_start_ip = u"20.0.0.1"
self.p2_dst_start_ip = u"10.0.0.0"
self.p2_dst_end_ip = u"10.15.66.63"
def define_packets(self):
"""Defines the packets to be sent from the traffic generator.
Packet definition: | ETH | IP |
: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=61
)
)
# Direction 1 --> 0
base_pkt_b = (
Ether() /
IP(
src=self.p2_src_start_ip,
dst=self.p2_dst_start_ip,
proto=61
)
)
# Direction 0 --> 1
vm1 = STLScVmRaw(
[
STLVmFlowVar(
name=u"dst",
min_value=self.p1_dst_start_ip,
max_value=self.p1_dst_end_ip,
size=4,
op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"dst",
pkt_offset=u"IP.dst"
),
STLVmFixIpv4(
offset=u"IP"
)
]
)
# Direction 1 --> 0
vm2 = STLScVmRaw(
[
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()
