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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.
- Direction 0 --> 1:
- Packet: ETH / IPv6 /
- Source IP address range: 2001:1::2 - 2001:1::FE
- Destination IP address range: 2001:2::2
- Direction 1 --> 0:
- Packet: ETH / DOT1Q / IPv6 /
- Source IP address range: 2001:2::2 - 2001:2::FE
- Destination IP address range: 2001:1::2
"""
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__()
# VLAN ID
self.vlan_id = 10
# IPs used in packet headers.
self.p1_src_start_ip = u"2001:1::2"
self.p1_src_end_ip = u"2001:1::FE"
self.p1_dst_start_ip = u"2001:2::2"
self.p2_src_start_ip = u"2001:2::2"
self.p2_src_end_ip = u"2001:2::FE"
self.p2_dst_start_ip = u"2001:1::2"
def define_packets(self):
"""Defines the packets to be sent from the traffic generator.
Packet definition: | ETH | IPv6 |
:returns: Packets to be sent from the traffic generator.
:rtype: tuple
"""
base_p1, count_p1 = self._get_start_end_ipv6(
self.p1_src_start_ip,
self.p1_src_end_ip
)
base_p2, count_p2 = self._get_start_end_ipv6(
self.p2_src_start_ip,
self.p2_src_end_ip
)
# Direction 0 --> 1
base_pkt_a = (
Ether() /
IPv6(
src=self.p1_src_start_ip,
dst=self.p1_dst_start_ip
)
)
# Direction 1 --> 0
base_pkt_b = (
Ether() /
Dot1Q(
vlan=self.vlan_id
) /
IPv6(
src=self.p2_src_start_ip,
dst=self.p2_dst_start_ip
)
)
# Direction 0 --> 1
vm1 = STLScVmRaw(
[
STLVmFlowVar(
name=u"ipv6_src",
min_value=base_p1,
max_value=base_p1 + count_p1,
size=8, op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"ipv6_src",
pkt_offset=u"IPv6.src",
offset_fixup=8
)
]
)
# Direction 1 --> 0
vm2 = STLScVmRaw(
[
STLVmFlowVar(
name=u"ipv6_src",
min_value=base_p2,
max_value=base_p2 + count_p2,
size=8, op=u"inc"
),
STLVmWrFlowVar(
fv_name=u"ipv6_src",
pkt_offset=u"IPv6.src",
offset_fixup=8
)
]
)
return base_pkt_a, base_pkt_b, vm1, vm2
def register():
"""Register this traffic profile to T-rex.
Do not change this function.
:returns: Traffic streams.
:rtype: Object
"""
return TrafficStreams()
