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vpp/test/test_srv6.py
Pablo Camarillo 3337bd2200 Fixed bugs in SRv6 API 
Jira ticket VPP-1196
Jira ticket VPP-1081
Jira ticket VPP-1078
Jira ticket VPP-1217

Change-Id: Id7e85229cae1017acb0aa4ca63ced334e6dafb8d
Signed-off-by: pcamaril <pcamaril@cisco.com>
Signed-off-by: Pablo Camarillo <pcamaril@cisco.com>
Signed-off-by: pcamaril <pcamaril@cisco.com>
Signed-off-by: Michal Cmarada <michal.cmarada@pantheon.tech>
2018-06-19 16:32:11 +00:00

2162 lines
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#!/usr/bin/env python
import unittest
import binascii
from socket import AF_INET6
from framework import VppTestCase, VppTestRunner
from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto, VppIpTable
from vpp_srv6 import SRv6LocalSIDBehaviors, VppSRv6LocalSID, VppSRv6Policy, \
SRv6PolicyType, VppSRv6Steering, SRv6PolicySteeringTypes
from scapy.packet import Raw
from scapy.layers.l2 import Ether, Dot1Q
from scapy.layers.inet6 import IPv6, UDP, IPv6ExtHdrSegmentRouting
from scapy.layers.inet import IP, UDP
from scapy.utils import inet_pton, inet_ntop
from util import ppp
class TestSRv6(VppTestCase):
""" SRv6 Test Case """
@classmethod
def setUpClass(self):
super(TestSRv6, self).setUpClass()
def setUp(self):
""" Perform test setup before each test case.
"""
super(TestSRv6, self).setUp()
# packet sizes, inclusive L2 overhead
self.pg_packet_sizes = [64, 512, 1518, 9018]
# reset packet_infos
self.reset_packet_infos()
def tearDown(self):
""" Clean up test setup after each test case.
"""
self.teardown_interfaces()
super(TestSRv6, self).tearDown()
def configure_interface(self,
interface,
ipv6=False, ipv4=False,
ipv6_table_id=0, ipv4_table_id=0):
""" Configure interface.
:param ipv6: configure IPv6 on interface
:param ipv4: configure IPv4 on interface
:param ipv6_table_id: FIB table_id for IPv6
:param ipv4_table_id: FIB table_id for IPv4
"""
self.logger.debug("Configuring interface %s" % (interface.name))
if ipv6:
self.logger.debug("Configuring IPv6")
interface.set_table_ip6(ipv6_table_id)
interface.config_ip6()
interface.resolve_ndp(timeout=5)
if ipv4:
self.logger.debug("Configuring IPv4")
interface.set_table_ip4(ipv4_table_id)
interface.config_ip4()
interface.resolve_arp()
interface.admin_up()
def setup_interfaces(self, ipv6=[], ipv4=[],
ipv6_table_id=[], ipv4_table_id=[]):
""" Create and configure interfaces.
:param ipv6: list of interface IPv6 capabilities
:param ipv4: list of interface IPv4 capabilities
:param ipv6_table_id: list of intf IPv6 FIB table_ids
:param ipv4_table_id: list of intf IPv4 FIB table_ids
:returns: List of created interfaces.
"""
# how many interfaces?
if len(ipv6):
count = len(ipv6)
else:
count = len(ipv4)
self.logger.debug("Creating and configuring %d interfaces" % (count))
# fill up ipv6 and ipv4 lists if needed
# not enabled (False) is the default
if len(ipv6) < count:
ipv6 += (count - len(ipv6)) * [False]
if len(ipv4) < count:
ipv4 += (count - len(ipv4)) * [False]
# fill up table_id lists if needed
# table_id 0 (global) is the default
if len(ipv6_table_id) < count:
ipv6_table_id += (count - len(ipv6_table_id)) * [0]
if len(ipv4_table_id) < count:
ipv4_table_id += (count - len(ipv4_table_id)) * [0]
# create 'count' pg interfaces
self.create_pg_interfaces(range(count))
# setup all interfaces
for i in range(count):
intf = self.pg_interfaces[i]
self.configure_interface(intf,
ipv6[i], ipv4[i],
ipv6_table_id[i], ipv4_table_id[i])
if any(ipv6):
self.logger.debug(self.vapi.cli("show ip6 neighbors"))
if any(ipv4):
self.logger.debug(self.vapi.cli("show ip arp"))
self.logger.debug(self.vapi.cli("show interface"))
self.logger.debug(self.vapi.cli("show hardware"))
return self.pg_interfaces
def teardown_interfaces(self):
""" Unconfigure and bring down interface.
"""
self.logger.debug("Tearing down interfaces")
# tear down all interfaces
# AFAIK they cannot be deleted
for i in self.pg_interfaces:
self.logger.debug("Tear down interface %s" % (i.name))
i.admin_down()
i.unconfig()
i.set_table_ip4(0)
i.set_table_ip6(0)
@unittest.skipUnless(0, "PC to fix")
def test_SRv6_T_Encaps(self):
""" Test SRv6 Transit.Encaps behavior for IPv6.
"""
# send traffic to one destination interface
# source and destination are IPv6 only
self.setup_interfaces(ipv6=[True, True])
# configure FIB entries
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure encaps IPv6 source address
# needs to be done before SR Policy config
# TODO: API?
self.vapi.cli("set sr encaps source addr a3::")
bsid = 'a3::9999:1'
# configure SRv6 Policy
# Note: segment list order: first -> last
sr_policy = VppSRv6Policy(
self, bsid=bsid,
is_encap=1,
sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
weight=1, fib_table=0,
segments=['a4::', 'a5::', 'a6::c7'],
source='a3::')
sr_policy.add_vpp_config()
self.sr_policy = sr_policy
# log the sr policies
self.logger.info(self.vapi.cli("show sr policies"))
# steer IPv6 traffic to a7::/64 into SRv6 Policy
# use the bsid of the above self.sr_policy
pol_steering = VppSRv6Steering(
self,
bsid=self.sr_policy.bsid,
prefix="a7::", mask_width=64,
traffic_type=SRv6PolicySteeringTypes.SR_STEER_IPV6,
sr_policy_index=0, table_id=0,
sw_if_index=0)
pol_steering.add_vpp_config()
# log the sr steering policies
self.logger.info(self.vapi.cli("show sr steering policies"))
# create packets
count = len(self.pg_packet_sizes)
dst_inner = 'a7::1234'
pkts = []
# create IPv6 packets without SRH
packet_header = self.create_packet_header_IPv6(dst_inner)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# create IPv6 packets with SRH
# packets with segments-left 1, active segment a7::
packet_header = self.create_packet_header_IPv6_SRH(
sidlist=['a8::', 'a7::', 'a6::'],
segleft=1)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# create IPv6 packets with SRH and IPv6
# packets with segments-left 1, active segment a7::
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a8::', 'a7::', 'a6::'],
segleft=1)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_T_Encaps)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SR steering
pol_steering.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr steering policies"))
# remove SR Policies
self.sr_policy.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr policies"))
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
@unittest.skipUnless(0, "PC to fix")
def test_SRv6_T_Insert(self):
""" Test SRv6 Transit.Insert behavior (IPv6 only).
"""
# send traffic to one destination interface
# source and destination are IPv6 only
self.setup_interfaces(ipv6=[True, True])
# configure FIB entries
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure encaps IPv6 source address
# needs to be done before SR Policy config
# TODO: API?
self.vapi.cli("set sr encaps source addr a3::")
bsid = 'a3::9999:1'
# configure SRv6 Policy
# Note: segment list order: first -> last
sr_policy = VppSRv6Policy(
self, bsid=bsid,
is_encap=0,
sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
weight=1, fib_table=0,
segments=['a4::', 'a5::', 'a6::c7'],
source='a3::')
sr_policy.add_vpp_config()
self.sr_policy = sr_policy
# log the sr policies
self.logger.info(self.vapi.cli("show sr policies"))
# steer IPv6 traffic to a7::/64 into SRv6 Policy
# use the bsid of the above self.sr_policy
pol_steering = VppSRv6Steering(
self,
bsid=self.sr_policy.bsid,
prefix="a7::", mask_width=64,
traffic_type=SRv6PolicySteeringTypes.SR_STEER_IPV6,
sr_policy_index=0, table_id=0,
sw_if_index=0)
pol_steering.add_vpp_config()
# log the sr steering policies
self.logger.info(self.vapi.cli("show sr steering policies"))
# create packets
count = len(self.pg_packet_sizes)
dst_inner = 'a7::1234'
pkts = []
# create IPv6 packets without SRH
packet_header = self.create_packet_header_IPv6(dst_inner)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# create IPv6 packets with SRH
# packets with segments-left 1, active segment a7::
packet_header = self.create_packet_header_IPv6_SRH(
sidlist=['a8::', 'a7::', 'a6::'],
segleft=1)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_T_Insert)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SR steering
pol_steering.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr steering policies"))
# remove SR Policies
self.sr_policy.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr policies"))
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
@unittest.skipUnless(0, "PC to fix")
def test_SRv6_T_Encaps_IPv4(self):
""" Test SRv6 Transit.Encaps behavior for IPv4.
"""
# send traffic to one destination interface
# source interface is IPv4 only
# destination interface is IPv6 only
self.setup_interfaces(ipv6=[False, True], ipv4=[True, False])
# configure FIB entries
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure encaps IPv6 source address
# needs to be done before SR Policy config
# TODO: API?
self.vapi.cli("set sr encaps source addr a3::")
bsid = 'a3::9999:1'
# configure SRv6 Policy
# Note: segment list order: first -> last
sr_policy = VppSRv6Policy(
self, bsid=bsid,
is_encap=1,
sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
weight=1, fib_table=0,
segments=['a4::', 'a5::', 'a6::c7'],
source='a3::')
sr_policy.add_vpp_config()
self.sr_policy = sr_policy
# log the sr policies
self.logger.info(self.vapi.cli("show sr policies"))
# steer IPv4 traffic to 7.1.1.0/24 into SRv6 Policy
# use the bsid of the above self.sr_policy
pol_steering = VppSRv6Steering(
self,
bsid=self.sr_policy.bsid,
prefix="7.1.1.0", mask_width=24,
traffic_type=SRv6PolicySteeringTypes.SR_STEER_IPV4,
sr_policy_index=0, table_id=0,
sw_if_index=0)
pol_steering.add_vpp_config()
# log the sr steering policies
self.logger.info(self.vapi.cli("show sr steering policies"))
# create packets
count = len(self.pg_packet_sizes)
dst_inner = '7.1.1.123'
pkts = []
# create IPv4 packets
packet_header = self.create_packet_header_IPv4(dst_inner)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_T_Encaps_IPv4)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SR steering
pol_steering.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr steering policies"))
# remove SR Policies
self.sr_policy.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr policies"))
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
@unittest.skip("VPP crashes after running this test")
def test_SRv6_T_Encaps_L2(self):
""" Test SRv6 Transit.Encaps behavior for L2.
"""
# send traffic to one destination interface
# source interface is IPv4 only TODO?
# destination interface is IPv6 only
self.setup_interfaces(ipv6=[False, True], ipv4=[False, False])
# configure FIB entries
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure encaps IPv6 source address
# needs to be done before SR Policy config
# TODO: API?
self.vapi.cli("set sr encaps source addr a3::")
bsid = 'a3::9999:1'
# configure SRv6 Policy
# Note: segment list order: first -> last
sr_policy = VppSRv6Policy(
self, bsid=bsid,
is_encap=1,
sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
weight=1, fib_table=0,
segments=['a4::', 'a5::', 'a6::c7'],
source='a3::')
sr_policy.add_vpp_config()
self.sr_policy = sr_policy
# log the sr policies
self.logger.info(self.vapi.cli("show sr policies"))
# steer L2 traffic into SRv6 Policy
# use the bsid of the above self.sr_policy
pol_steering = VppSRv6Steering(
self,
bsid=self.sr_policy.bsid,
prefix="::", mask_width=0,
traffic_type=SRv6PolicySteeringTypes.SR_STEER_L2,
sr_policy_index=0, table_id=0,
sw_if_index=self.pg0.sw_if_index)
pol_steering.add_vpp_config()
# log the sr steering policies
self.logger.info(self.vapi.cli("show sr steering policies"))
# create packets
count = len(self.pg_packet_sizes)
pkts = []
# create L2 packets without dot1q header
packet_header = self.create_packet_header_L2()
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# create L2 packets with dot1q header
packet_header = self.create_packet_header_L2(vlan=123)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_T_Encaps_L2)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SR steering
pol_steering.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr steering policies"))
# remove SR Policies
self.sr_policy.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr policies"))
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End(self):
""" Test SRv6 End (without PSP) behavior.
"""
# send traffic to one destination interface
# source and destination interfaces are IPv6 only
self.setup_interfaces(ipv6=[True, True])
# configure FIB entries
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure SRv6 localSID End without PSP behavior
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::0'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_END,
nh_addr4='0.0.0.0',
nh_addr6='::',
end_psp=0,
sw_if_index=0,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# create IPv6 packets with SRH (SL=2, SL=1, SL=0)
# send one packet per SL value per packet size
# SL=0 packet with localSID End with USP needs 2nd SRH
count = len(self.pg_packet_sizes)
dst_inner = 'a4::1234'
pkts = []
# packets with segments-left 2, active segment a3::
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a5::', 'a4::', 'a3::'],
segleft=2)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets with segments-left 1, active segment a3::
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a4::', 'a3::', 'a2::'],
segleft=1)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# TODO: test behavior with SL=0 packet (needs 2*SRH?)
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_End)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_with_PSP(self):
""" Test SRv6 End with PSP behavior.
"""
# send traffic to one destination interface
# source and destination interfaces are IPv6 only
self.setup_interfaces(ipv6=[True, True])
# configure FIB entries
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure SRv6 localSID End with PSP behavior
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::0'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_END,
nh_addr4='0.0.0.0',
nh_addr6='::',
end_psp=1,
sw_if_index=0,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# create IPv6 packets with SRH (SL=2, SL=1)
# send one packet per SL value per packet size
# SL=0 packet with localSID End with PSP is dropped
count = len(self.pg_packet_sizes)
dst_inner = 'a4::1234'
pkts = []
# packets with segments-left 2, active segment a3::
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a5::', 'a4::', 'a3::'],
segleft=2)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets with segments-left 1, active segment a3::
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a4::', 'a3::', 'a2::'],
segleft=1)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_End_PSP)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_X(self):
""" Test SRv6 End.X (without PSP) behavior.
"""
# create three interfaces (1 source, 2 destinations)
# source and destination interfaces are IPv6 only
self.setup_interfaces(ipv6=[True, True, True])
# configure FIB entries
# a4::/64 via pg1 and pg2
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6),
VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
self.logger.debug(self.vapi.cli("show ip6 fib"))
# configure SRv6 localSID End.X without PSP behavior
# End.X points to interface pg1
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::C4'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_X,
nh_addr4='0.0.0.0',
nh_addr6=self.pg1.remote_ip6,
end_psp=0,
sw_if_index=self.pg1.sw_if_index,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# create IPv6 packets with SRH (SL=2, SL=1)
# send one packet per SL value per packet size
# SL=0 packet with localSID End with PSP is dropped
count = len(self.pg_packet_sizes)
dst_inner = 'a4::1234'
pkts = []
# packets with segments-left 2, active segment a3::c4
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a5::', 'a4::', 'a3::c4'],
segleft=2)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets with segments-left 1, active segment a3::c4
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a4::', 'a3::c4', 'a2::'],
segleft=1)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
# using same comparison function as End (no PSP)
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_End)
# assert nothing was received on the other interface (pg2)
self.pg2.assert_nothing_captured("mis-directed packet(s)")
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_X_with_PSP(self):
""" Test SRv6 End.X with PSP behavior.
"""
# create three interfaces (1 source, 2 destinations)
# source and destination interfaces are IPv6 only
self.setup_interfaces(ipv6=[True, True, True])
# configure FIB entries
# a4::/64 via pg1 and pg2
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6),
VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure SRv6 localSID End with PSP behavior
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::C4'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_X,
nh_addr4='0.0.0.0',
nh_addr6=self.pg1.remote_ip6,
end_psp=1,
sw_if_index=self.pg1.sw_if_index,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# create IPv6 packets with SRH (SL=2, SL=1)
# send one packet per SL value per packet size
# SL=0 packet with localSID End with PSP is dropped
count = len(self.pg_packet_sizes)
dst_inner = 'a4::1234'
pkts = []
# packets with segments-left 2, active segment a3::
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a5::', 'a4::', 'a3::c4'],
segleft=2)
# create traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets with segments-left 1, active segment a3::
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a4::', 'a3::c4', 'a2::'],
segleft=1)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
# using same comparison function as End with PSP
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_End_PSP)
# assert nothing was received on the other interface (pg2)
self.pg2.assert_nothing_captured("mis-directed packet(s)")
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_DX6(self):
""" Test SRv6 End.DX6 behavior.
"""
# send traffic to one destination interface
# source and destination interfaces are IPv6 only
self.setup_interfaces(ipv6=[True, True])
# configure SRv6 localSID End.DX6 behavior
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::C4'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX6,
nh_addr4='0.0.0.0',
nh_addr6=self.pg1.remote_ip6,
end_psp=0,
sw_if_index=self.pg1.sw_if_index,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# create IPv6 packets with SRH (SL=0)
# send one packet per packet size
count = len(self.pg_packet_sizes)
dst_inner = 'a4::1234' # inner header destination address
pkts = []
# packets with SRH, segments-left 0, active segment a3::c4
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a3::c4', 'a2::', 'a1::'],
segleft=0)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets without SRH, IPv6 in IPv6
# outer IPv6 dest addr is the localsid End.DX6
packet_header = self.create_packet_header_IPv6_IPv6(
dst_inner,
dst_outer='a3::c4')
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_End_DX6)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_DT6(self):
""" Test SRv6 End.DT6 behavior.
"""
# create three interfaces (1 source, 2 destinations)
# all interfaces are IPv6 only
# source interface in global FIB (0)
# destination interfaces in global and vrf
vrf_1 = 1
ipt = VppIpTable(self, vrf_1, is_ip6=True)
ipt.add_vpp_config()
self.setup_interfaces(ipv6=[True, True, True],
ipv6_table_id=[0, 0, vrf_1])
# configure FIB entries
# a4::/64 is reachable
# via pg1 in table 0 (global)
# and via pg2 in table vrf_1
route0 = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6,
nh_table_id=0)],
table_id=0,
is_ip6=1)
route0.add_vpp_config()
route1 = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6,
nh_table_id=vrf_1)],
table_id=vrf_1,
is_ip6=1)
route1.add_vpp_config()
self.logger.debug(self.vapi.cli("show ip6 fib"))
# configure SRv6 localSID End.DT6 behavior
# Note:
# fib_table: where the localsid is installed
# sw_if_index: in T-variants of localsid this is the vrf table_id
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::C4'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DT6,
nh_addr4='0.0.0.0',
nh_addr6='::',
end_psp=0,
sw_if_index=vrf_1,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# create IPv6 packets with SRH (SL=0)
# send one packet per packet size
count = len(self.pg_packet_sizes)
dst_inner = 'a4::1234' # inner header destination address
pkts = []
# packets with SRH, segments-left 0, active segment a3::c4
packet_header = self.create_packet_header_IPv6_SRH_IPv6(
dst_inner,
sidlist=['a3::c4', 'a2::', 'a1::'],
segleft=0)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
self.pg_packet_sizes, count))
# packets without SRH, IPv6 in IPv6
# outer IPv6 dest addr is the localsid End.DT6
packet_header = self.create_packet_header_IPv6_IPv6(
dst_inner,
dst_outer='a3::c4')
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
# using same comparison function as End.DX6
self.send_and_verify_pkts(self.pg0, pkts, self.pg2,
self.compare_rx_tx_packet_End_DX6)
# assert nothing was received on the other interface (pg2)
self.pg1.assert_nothing_captured("mis-directed packet(s)")
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_DX4(self):
""" Test SRv6 End.DX4 behavior.
"""
# send traffic to one destination interface
# source interface is IPv6 only
# destination interface is IPv4 only
self.setup_interfaces(ipv6=[True, False], ipv4=[False, True])
# configure SRv6 localSID End.DX4 behavior
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::C4'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX4,
nh_addr4=self.pg1.remote_ip4,
nh_addr6='::',
end_psp=0,
sw_if_index=self.pg1.sw_if_index,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# send one packet per packet size
count = len(self.pg_packet_sizes)
dst_inner = '4.1.1.123' # inner header destination address
pkts = []
# packets with SRH, segments-left 0, active segment a3::c4
packet_header = self.create_packet_header_IPv6_SRH_IPv4(
dst_inner,
sidlist=['a3::c4', 'a2::', 'a1::'],
segleft=0)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets without SRH, IPv4 in IPv6
# outer IPv6 dest addr is the localsid End.DX4
packet_header = self.create_packet_header_IPv6_IPv4(
dst_inner,
dst_outer='a3::c4')
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_End_DX4)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_DT4(self):
""" Test SRv6 End.DT4 behavior.
"""
# create three interfaces (1 source, 2 destinations)
# source interface is IPv6-only
# destination interfaces are IPv4 only
# source interface in global FIB (0)
# destination interfaces in global and vrf
vrf_1 = 1
ipt = VppIpTable(self, vrf_1)
ipt.add_vpp_config()
self.setup_interfaces(ipv6=[True, False, False],
ipv4=[False, True, True],
ipv6_table_id=[0, 0, 0],
ipv4_table_id=[0, 0, vrf_1])
# configure FIB entries
# 4.1.1.0/24 is reachable
# via pg1 in table 0 (global)
# and via pg2 in table vrf_1
route0 = VppIpRoute(self, "4.1.1.0", 24,
[VppRoutePath(self.pg1.remote_ip4,
self.pg1.sw_if_index,
nh_table_id=0)],
table_id=0,
is_ip6=0)
route0.add_vpp_config()
route1 = VppIpRoute(self, "4.1.1.0", 24,
[VppRoutePath(self.pg2.remote_ip4,
self.pg2.sw_if_index,
nh_table_id=vrf_1)],
table_id=vrf_1,
is_ip6=0)
route1.add_vpp_config()
self.logger.debug(self.vapi.cli("show ip fib"))
# configure SRv6 localSID End.DT6 behavior
# Note:
# fib_table: where the localsid is installed
# sw_if_index: in T-variants of localsid: vrf table_id
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::C4'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DT4,
nh_addr4='0.0.0.0',
nh_addr6='::',
end_psp=0,
sw_if_index=vrf_1,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# create IPv6 packets with SRH (SL=0)
# send one packet per packet size
count = len(self.pg_packet_sizes)
dst_inner = '4.1.1.123' # inner header destination address
pkts = []
# packets with SRH, segments-left 0, active segment a3::c4
packet_header = self.create_packet_header_IPv6_SRH_IPv4(
dst_inner,
sidlist=['a3::c4', 'a2::', 'a1::'],
segleft=0)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
self.pg_packet_sizes, count))
# packets without SRH, IPv6 in IPv6
# outer IPv6 dest addr is the localsid End.DX4
packet_header = self.create_packet_header_IPv6_IPv4(
dst_inner,
dst_outer='a3::c4')
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
# using same comparison function as End.DX4
self.send_and_verify_pkts(self.pg0, pkts, self.pg2,
self.compare_rx_tx_packet_End_DX4)
# assert nothing was received on the other interface (pg2)
self.pg1.assert_nothing_captured("mis-directed packet(s)")
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def test_SRv6_End_DX2(self):
""" Test SRv6 End.DX2 behavior.
"""
# send traffic to one destination interface
# source interface is IPv6 only
self.setup_interfaces(ipv6=[True, False], ipv4=[False, False])
# configure SRv6 localSID End.DX2 behavior
localsid = VppSRv6LocalSID(
self, localsid={'addr': 'A3::C4'},
behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX2,
nh_addr4='0.0.0.0',
nh_addr6='::',
end_psp=0,
sw_if_index=self.pg1.sw_if_index,
vlan_index=0,
fib_table=0)
localsid.add_vpp_config()
# log the localsids
self.logger.debug(self.vapi.cli("show sr localsid"))
# send one packet per packet size
count = len(self.pg_packet_sizes)
pkts = []
# packets with SRH, segments-left 0, active segment a3::c4
# L2 has no dot1q header
packet_header = self.create_packet_header_IPv6_SRH_L2(
sidlist=['a3::c4', 'a2::', 'a1::'],
segleft=0,
vlan=0)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets with SRH, segments-left 0, active segment a3::c4
# L2 has dot1q header
packet_header = self.create_packet_header_IPv6_SRH_L2(
sidlist=['a3::c4', 'a2::', 'a1::'],
segleft=0,
vlan=123)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets without SRH, L2 in IPv6
# outer IPv6 dest addr is the localsid End.DX2
# L2 has no dot1q header
packet_header = self.create_packet_header_IPv6_L2(
dst_outer='a3::c4',
vlan=0)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# packets without SRH, L2 in IPv6
# outer IPv6 dest addr is the localsid End.DX2
# L2 has dot1q header
packet_header = self.create_packet_header_IPv6_L2(
dst_outer='a3::c4',
vlan=123)
# add to traffic stream pg0->pg1
pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
self.compare_rx_tx_packet_End_DX2)
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove SRv6 localSIDs
localsid.remove_vpp_config()
# cleanup interfaces
self.teardown_interfaces()
@unittest.skipUnless(0, "PC to fix")
def test_SRv6_T_Insert_Classifier(self):
""" Test SRv6 Transit.Insert behavior (IPv6 only).
steer packets using the classifier
"""
# send traffic to one destination interface
# source and destination are IPv6 only
self.setup_interfaces(ipv6=[False, False, False, True, True])
# configure FIB entries
route = VppIpRoute(self, "a4::", 64,
[VppRoutePath(self.pg4.remote_ip6,
self.pg4.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)],
is_ip6=1)
route.add_vpp_config()
# configure encaps IPv6 source address
# needs to be done before SR Policy config
# TODO: API?
self.vapi.cli("set sr encaps source addr a3::")
bsid = 'a3::9999:1'
# configure SRv6 Policy
# Note: segment list order: first -> last
sr_policy = VppSRv6Policy(
self, bsid=bsid,
is_encap=0,
sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
weight=1, fib_table=0,
segments=['a4::', 'a5::', 'a6::c7'],
source='a3::')
sr_policy.add_vpp_config()
self.sr_policy = sr_policy
# log the sr policies
self.logger.info(self.vapi.cli("show sr policies"))
# add classify table
# mask on dst ip address prefix a7::/8
mask = '{:0<16}'.format('ff')
r = self.vapi.classify_add_del_table(
1,
binascii.unhexlify(mask),
match_n_vectors=(len(mask) - 1) // 32 + 1,
current_data_flag=1,
skip_n_vectors=2) # data offset
self.assertIsNotNone(r, msg='No response msg for add_del_table')
table_index = r.new_table_index
# add the source routign node as a ip6 inacl netxt node
r = self.vapi.add_node_next('ip6-inacl',
'sr-pl-rewrite-insert')
inacl_next_node_index = r.node_index
match = '{:0<16}'.format('a7')
r = self.vapi.classify_add_del_session(
1,
table_index,
binascii.unhexlify(match),
hit_next_index=inacl_next_node_index,
action=3,
metadata=0) # sr policy index
self.assertIsNotNone(r, msg='No response msg for add_del_session')
# log the classify table used in the steering policy
self.logger.info(self.vapi.cli("show classify table"))
r = self.vapi.input_acl_set_interface(
is_add=1,
sw_if_index=self.pg3.sw_if_index,
ip6_table_index=table_index)
self.assertIsNotNone(r,
msg='No response msg for input_acl_set_interface')
# log the ip6 inacl
self.logger.info(self.vapi.cli("show inacl type ip6"))
# create packets
count = len(self.pg_packet_sizes)
dst_inner = 'a7::1234'
pkts = []
# create IPv6 packets without SRH
packet_header = self.create_packet_header_IPv6(dst_inner)
# create traffic stream pg3->pg4
pkts.extend(self.create_stream(self.pg3, self.pg4, packet_header,
self.pg_packet_sizes, count))
# create IPv6 packets with SRH
# packets with segments-left 1, active segment a7::
packet_header = self.create_packet_header_IPv6_SRH(
sidlist=['a8::', 'a7::', 'a6::'],
segleft=1)
# create traffic stream pg3->pg4
pkts.extend(self.create_stream(self.pg3, self.pg4, packet_header,
self.pg_packet_sizes, count))
# send packets and verify received packets
self.send_and_verify_pkts(self.pg3, pkts, self.pg4,
self.compare_rx_tx_packet_T_Insert)
# remove the interface l2 input feature
r = self.vapi.input_acl_set_interface(
is_add=0,
sw_if_index=self.pg3.sw_if_index,
ip6_table_index=table_index)
self.assertIsNotNone(r,
msg='No response msg for input_acl_set_interface')
# log the ip6 inacl after cleaning
self.logger.info(self.vapi.cli("show inacl type ip6"))
# log the localsid counters
self.logger.info(self.vapi.cli("show sr localsid"))
# remove classifier SR steering
# classifier_steering.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr steering policies"))
# remove SR Policies
self.sr_policy.remove_vpp_config()
self.logger.info(self.vapi.cli("show sr policies"))
# remove classify session and table
r = self.vapi.classify_add_del_session(
0,
table_index,
binascii.unhexlify(match))
self.assertIsNotNone(r, msg='No response msg for add_del_session')
r = self.vapi.classify_add_del_table(
0,
binascii.unhexlify(mask),
table_index=table_index)
self.assertIsNotNone(r, msg='No response msg for add_del_table')
self.logger.info(self.vapi.cli("show classify table"))
# remove FIB entries
# done by tearDown
# cleanup interfaces
self.teardown_interfaces()
def compare_rx_tx_packet_T_Encaps(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing T.Encaps
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# T.Encaps updates the headers as follows:
# SR Policy seglist (S3, S2, S1)
# SR Policy source C
# IPv6:
# in: IPv6(A, B2)
# out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv6(A, B2)
# IPv6 + SRH:
# in: IPv6(A, B2)SRH(B3, B2, B1; SL=1)
# out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv6(a, B2)SRH(B3, B2, B1; SL=1)
# get first (outer) IPv6 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IPv6)
rx_srh = None
tx_ip = tx_pkt.getlayer(IPv6)
# expected segment-list
seglist = self.sr_policy.segments
# reverse list to get order as in SRH
tx_seglist = seglist[::-1]
# get source address of SR Policy
sr_policy_source = self.sr_policy.source
# rx'ed packet should have SRH
self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
# get SRH
rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
# received ip.src should be equal to SR Policy source
self.assertEqual(rx_ip.src, sr_policy_source)
# received ip.dst should be equal to expected sidlist[lastentry]
self.assertEqual(rx_ip.dst, tx_seglist[-1])
# rx'ed seglist should be equal to expected seglist
self.assertEqual(rx_srh.addresses, tx_seglist)
# segleft should be equal to size expected seglist-1
self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
# segleft should be equal to lastentry
self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
# the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
# except for the hop-limit field
# -> update tx'ed hlim to the expected hlim
tx_ip.hlim = tx_ip.hlim - 1
self.assertEqual(rx_srh.payload, tx_ip)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_T_Encaps_IPv4(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing T.Encaps for IPv4
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# T.Encaps for IPv4 updates the headers as follows:
# SR Policy seglist (S3, S2, S1)
# SR Policy source C
# IPv4:
# in: IPv4(A, B2)
# out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv4(A, B2)
# get first (outer) IPv6 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IPv6)
rx_srh = None
tx_ip = tx_pkt.getlayer(IP)
# expected segment-list
seglist = self.sr_policy.segments
# reverse list to get order as in SRH
tx_seglist = seglist[::-1]
# get source address of SR Policy
sr_policy_source = self.sr_policy.source
# checks common to cases tx with and without SRH
# rx'ed packet should have SRH and IPv4 header
self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
self.assertTrue(rx_ip.payload.haslayer(IP))
# get SRH
rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
# received ip.src should be equal to SR Policy source
self.assertEqual(rx_ip.src, sr_policy_source)
# received ip.dst should be equal to sidlist[lastentry]
self.assertEqual(rx_ip.dst, tx_seglist[-1])
# rx'ed seglist should be equal to seglist
self.assertEqual(rx_srh.addresses, tx_seglist)
# segleft should be equal to size seglist-1
self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
# segleft should be equal to lastentry
self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
# the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
# except for the ttl field and ip checksum
# -> adjust tx'ed ttl to expected ttl
tx_ip.ttl = tx_ip.ttl - 1
# -> set tx'ed ip checksum to None and let scapy recompute
tx_ip.chksum = None
# read back the pkt (with str()) to force computing these fields
# probably other ways to accomplish this are possible
tx_ip = IP(str(tx_ip))
self.assertEqual(rx_srh.payload, tx_ip)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_T_Encaps_L2(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing T.Encaps for L2
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# T.Encaps for L2 updates the headers as follows:
# SR Policy seglist (S3, S2, S1)
# SR Policy source C
# L2:
# in: L2
# out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)L2
# get first (outer) IPv6 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IPv6)
rx_srh = None
tx_ether = tx_pkt.getlayer(Ether)
# expected segment-list
seglist = self.sr_policy.segments
# reverse list to get order as in SRH
tx_seglist = seglist[::-1]
# get source address of SR Policy
sr_policy_source = self.sr_policy.source
# rx'ed packet should have SRH
self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
# get SRH
rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
# received ip.src should be equal to SR Policy source
self.assertEqual(rx_ip.src, sr_policy_source)
# received ip.dst should be equal to sidlist[lastentry]
self.assertEqual(rx_ip.dst, tx_seglist[-1])
# rx'ed seglist should be equal to seglist
self.assertEqual(rx_srh.addresses, tx_seglist)
# segleft should be equal to size seglist-1
self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
# segleft should be equal to lastentry
self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
# nh should be "No Next Header" (59)
self.assertEqual(rx_srh.nh, 59)
# the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
self.assertEqual(Ether(str(rx_srh.payload)), tx_ether)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_T_Insert(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing T.Insert
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# T.Insert updates the headers as follows:
# IPv6:
# in: IPv6(A, B2)
# out: IPv6(A, S1)SRH(B2, S3, S2, S1; SL=3)
# IPv6 + SRH:
# in: IPv6(A, B2)SRH(B3, B2, B1; SL=1)
# out: IPv6(A, S1)SRH(B2, S3, S2, S1; SL=3)SRH(B3, B2, B1; SL=1)
# get first (outer) IPv6 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IPv6)
rx_srh = None
rx_ip2 = None
rx_srh2 = None
rx_ip3 = None
rx_udp = rx_pkt[UDP]
tx_ip = tx_pkt.getlayer(IPv6)
tx_srh = None
tx_ip2 = None
# some packets have been tx'ed with an SRH, some without it
# get SRH if tx'ed packet has it
if tx_pkt.haslayer(IPv6ExtHdrSegmentRouting):
tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
tx_ip2 = tx_pkt.getlayer(IPv6, 2)
tx_udp = tx_pkt[UDP]
# expected segment-list (make copy of SR Policy segment list)
seglist = self.sr_policy.segments[:]
# expected seglist has initial dest addr as last segment
seglist.append(tx_ip.dst)
# reverse list to get order as in SRH
tx_seglist = seglist[::-1]
# get source address of SR Policy
sr_policy_source = self.sr_policy.source
# checks common to cases tx with and without SRH
# rx'ed packet should have SRH and only one IPv6 header
self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
self.assertFalse(rx_ip.payload.haslayer(IPv6))
# get SRH
rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
# rx'ed ip.src should be equal to tx'ed ip.src
self.assertEqual(rx_ip.src, tx_ip.src)
# rx'ed ip.dst should be equal to sidlist[lastentry]
self.assertEqual(rx_ip.dst, tx_seglist[-1])
# rx'ed seglist should be equal to expected seglist
self.assertEqual(rx_srh.addresses, tx_seglist)
# segleft should be equal to size(expected seglist)-1
self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
# segleft should be equal to lastentry
self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
if tx_srh: # packet was tx'ed with SRH
# packet should have 2nd SRH
self.assertTrue(rx_srh.payload.haslayer(IPv6ExtHdrSegmentRouting))
# get 2nd SRH
rx_srh2 = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting, 2)
# rx'ed srh2.addresses should be equal to tx'ed srh.addresses
self.assertEqual(rx_srh2.addresses, tx_srh.addresses)
# rx'ed srh2.segleft should be equal to tx'ed srh.segleft
self.assertEqual(rx_srh2.segleft, tx_srh.segleft)
# rx'ed srh2.lastentry should be equal to tx'ed srh.lastentry
self.assertEqual(rx_srh2.lastentry, tx_srh.lastentry)
else: # packet was tx'ed without SRH
# rx packet should have no other SRH
self.assertFalse(rx_srh.payload.haslayer(IPv6ExtHdrSegmentRouting))
# UDP layer should be unchanged
self.assertEqual(rx_udp, tx_udp)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_End(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing End (without PSP)
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# End (no PSP) updates the headers as follows:
# IPv6 + SRH:
# in: IPv6(A, S1)SRH(S3, S2, S1; SL=2)
# out: IPv6(A, S2)SRH(S3, S2, S1; SL=1)
# get first (outer) IPv6 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IPv6)
rx_srh = None
rx_ip2 = None
rx_udp = rx_pkt[UDP]
tx_ip = tx_pkt.getlayer(IPv6)
# we know the packet has been tx'ed
# with an inner IPv6 header and an SRH
tx_ip2 = tx_pkt.getlayer(IPv6, 2)
tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
tx_udp = tx_pkt[UDP]
# common checks, regardless of tx segleft value
# rx'ed packet should have 2nd IPv6 header
self.assertTrue(rx_ip.payload.haslayer(IPv6))
# get second (inner) IPv6 header
rx_ip2 = rx_pkt.getlayer(IPv6, 2)
if tx_ip.segleft > 0:
# SRH should NOT have been popped:
# End SID without PSP does not pop SRH if segleft>0
self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
# received ip.src should be equal to expected ip.src
self.assertEqual(rx_ip.src, tx_ip.src)
# sidlist should be unchanged
self.assertEqual(rx_srh.addresses, tx_srh.addresses)
# segleft should have been decremented
self.assertEqual(rx_srh.segleft, tx_srh.segleft-1)
# received ip.dst should be equal to sidlist[segleft]
self.assertEqual(rx_ip.dst, rx_srh.addresses[rx_srh.segleft])
# lastentry should be unchanged
self.assertEqual(rx_srh.lastentry, tx_srh.lastentry)
# inner IPv6 packet (ip2) should be unchanged
self.assertEqual(rx_ip2.src, tx_ip2.src)
self.assertEqual(rx_ip2.dst, tx_ip2.dst)
# else: # tx_ip.segleft == 0
# TODO: Does this work with 2 SRHs in ingress packet?
# UDP layer should be unchanged
self.assertEqual(rx_udp, tx_udp)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_End_PSP(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing End with PSP
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# End (PSP) updates the headers as follows:
# IPv6 + SRH (SL>1):
# in: IPv6(A, S1)SRH(S3, S2, S1; SL=2)
# out: IPv6(A, S2)SRH(S3, S2, S1; SL=1)
# IPv6 + SRH (SL=1):
# in: IPv6(A, S2)SRH(S3, S2, S1; SL=1)
# out: IPv6(A, S3)
# get first (outer) IPv6 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IPv6)
rx_srh = None
rx_ip2 = None
rx_udp = rx_pkt[UDP]
tx_ip = tx_pkt.getlayer(IPv6)
# we know the packet has been tx'ed
# with an inner IPv6 header and an SRH
tx_ip2 = tx_pkt.getlayer(IPv6, 2)
tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
tx_udp = tx_pkt[UDP]
# common checks, regardless of tx segleft value
self.assertTrue(rx_ip.payload.haslayer(IPv6))
rx_ip2 = rx_pkt.getlayer(IPv6, 2)
# inner IPv6 packet (ip2) should be unchanged
self.assertEqual(rx_ip2.src, tx_ip2.src)
self.assertEqual(rx_ip2.dst, tx_ip2.dst)
if tx_ip.segleft > 1:
# SRH should NOT have been popped:
# End SID with PSP does not pop SRH if segleft>1
# rx'ed packet should have SRH
self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
# received ip.src should be equal to expected ip.src
self.assertEqual(rx_ip.src, tx_ip.src)
# sidlist should be unchanged
self.assertEqual(rx_srh.addresses, tx_srh.addresses)
# segleft should have been decremented
self.assertEqual(rx_srh.segleft, tx_srh.segleft-1)
# received ip.dst should be equal to sidlist[segleft]
self.assertEqual(rx_ip.dst, rx_srh.addresses[rx_srh.segleft])
# lastentry should be unchanged
self.assertEqual(rx_srh.lastentry, tx_srh.lastentry)
else: # tx_ip.segleft <= 1
# SRH should have been popped:
# End SID with PSP and segleft=1 pops SRH
# the two IPv6 headers are still present
# outer IPv6 header has DA == last segment of popped SRH
# SRH should not be present
self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
# outer IPv6 header ip.src should be equal to tx'ed ip.src
self.assertEqual(rx_ip.src, tx_ip.src)
# outer IPv6 header ip.dst should be = to tx'ed sidlist[segleft-1]
self.assertEqual(rx_ip.dst, tx_srh.addresses[tx_srh.segleft-1])
# UDP layer should be unchanged
self.assertEqual(rx_udp, tx_udp)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_End_DX6(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing End.DX6
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# End.DX6 updates the headers as follows:
# IPv6 + SRH (SL=0):
# in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)IPv6(B, D)
# out: IPv6(B, D)
# IPv6:
# in: IPv6(A, S3)IPv6(B, D)
# out: IPv6(B, D)
# get first (outer) IPv6 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IPv6)
tx_ip = tx_pkt.getlayer(IPv6)
tx_ip2 = tx_pkt.getlayer(IPv6, 2)
# verify if rx'ed packet has no SRH
self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
# the whole rx_ip pkt should be equal to tx_ip2
# except for the hlim field
# -> adjust tx'ed hlim to expected hlim
tx_ip2.hlim = tx_ip2.hlim - 1
self.assertEqual(rx_ip, tx_ip2)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_End_DX4(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing End.DX4
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# End.DX4 updates the headers as follows:
# IPv6 + SRH (SL=0):
# in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)IPv4(B, D)
# out: IPv4(B, D)
# IPv6:
# in: IPv6(A, S3)IPv4(B, D)
# out: IPv4(B, D)
# get IPv4 header of rx'ed packet
rx_ip = rx_pkt.getlayer(IP)
tx_ip = tx_pkt.getlayer(IPv6)
tx_ip2 = tx_pkt.getlayer(IP)
# verify if rx'ed packet has no SRH
self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
# the whole rx_ip pkt should be equal to tx_ip2
# except for the ttl field and ip checksum
# -> adjust tx'ed ttl to expected ttl
tx_ip2.ttl = tx_ip2.ttl - 1
# -> set tx'ed ip checksum to None and let scapy recompute
tx_ip2.chksum = None
# read back the pkt (with str()) to force computing these fields
# probably other ways to accomplish this are possible
tx_ip2 = IP(str(tx_ip2))
self.assertEqual(rx_ip, tx_ip2)
self.logger.debug("packet verification: SUCCESS")
def compare_rx_tx_packet_End_DX2(self, tx_pkt, rx_pkt):
""" Compare input and output packet after passing End.DX2
:param tx_pkt: transmitted packet
:param rx_pkt: received packet
"""
# End.DX2 updates the headers as follows:
# IPv6 + SRH (SL=0):
# in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)L2
# out: L2
# IPv6:
# in: IPv6(A, S3)L2
# out: L2
# get IPv4 header of rx'ed packet
rx_eth = rx_pkt.getlayer(Ether)
tx_ip = tx_pkt.getlayer(IPv6)
# we can't just get the 2nd Ether layer
# get the Raw content and dissect it as Ether
tx_eth1 = Ether(str(tx_pkt[Raw]))
# verify if rx'ed packet has no SRH
self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
# the whole rx_eth pkt should be equal to tx_eth1
self.assertEqual(rx_eth, tx_eth1)
self.logger.debug("packet verification: SUCCESS")
def create_stream(self, src_if, dst_if, packet_header, packet_sizes,
count):
"""Create SRv6 input packet stream for defined interface.
:param VppInterface src_if: Interface to create packet stream for
:param VppInterface dst_if: destination interface of packet stream
:param packet_header: Layer3 scapy packet headers,
L2 is added when not provided,
Raw(payload) with packet_info is added
:param list packet_sizes: packet stream pckt sizes,sequentially applied
to packets in stream have
:param int count: number of packets in packet stream
:return: list of packets
"""
self.logger.info("Creating packets")
pkts = []
for i in range(0, count-1):
payload_info = self.create_packet_info(src_if, dst_if)
self.logger.debug(
"Creating packet with index %d" % (payload_info.index))
payload = self.info_to_payload(payload_info)
# add L2 header if not yet provided in packet_header
if packet_header.getlayer(0).name == 'Ethernet':
p = (packet_header /
Raw(payload))
else:
p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
packet_header /
Raw(payload))
size = packet_sizes[i % len(packet_sizes)]
self.logger.debug("Packet size %d" % (size))
self.extend_packet(p, size)
# we need to store the packet with the automatic fields computed
# read back the dumped packet (with str())
# to force computing these fields
# probably other ways are possible
p = Ether(str(p))
payload_info.data = p.copy()
self.logger.debug(ppp("Created packet:", p))
pkts.append(p)
self.logger.info("Done creating packets")
return pkts
def send_and_verify_pkts(self, input, pkts, output, compare_func):
"""Send packets and verify received packets using compare_func
:param input: ingress interface of DUT
:param pkts: list of packets to transmit
:param output: egress interface of DUT
:param compare_func: function to compare in and out packets
"""
# add traffic stream to input interface
input.add_stream(pkts)
# enable capture on all interfaces
self.pg_enable_capture(self.pg_interfaces)
# start traffic
self.logger.info("Starting traffic")
self.pg_start()
# get output capture
self.logger.info("Getting packet capture")
capture = output.get_capture()
# assert nothing was captured on input interface
input.assert_nothing_captured()
# verify captured packets
self.verify_captured_pkts(output, capture, compare_func)
def create_packet_header_IPv6(self, dst):
"""Create packet header: IPv6 header, UDP header
:param dst: IPv6 destination address
IPv6 source address is 1234::1
UDP source port and destination port are 1234
"""
p = (IPv6(src='1234::1', dst=dst) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_IPv6_SRH(self, sidlist, segleft):
"""Create packet header: IPv6 header with SRH, UDP header
:param list sidlist: segment list
:param int segleft: segments-left field value
IPv6 destination address is set to sidlist[segleft]
IPv6 source addresses are 1234::1 and 4321::1
UDP source port and destination port are 1234
"""
p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
IPv6ExtHdrSegmentRouting(addresses=sidlist) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_IPv6_SRH_IPv6(self, dst, sidlist, segleft):
"""Create packet header: IPv6 encapsulated in SRv6:
IPv6 header with SRH, IPv6 header, UDP header
:param ipv6address dst: inner IPv6 destination address
:param list sidlist: segment list of outer IPv6 SRH
:param int segleft: segments-left field of outer IPv6 SRH
Outer IPv6 destination address is set to sidlist[segleft]
IPv6 source addresses are 1234::1 and 4321::1
UDP source port and destination port are 1234
"""
p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
IPv6ExtHdrSegmentRouting(addresses=sidlist,
segleft=segleft, nh=41) /
IPv6(src='4321::1', dst=dst) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_IPv6_IPv6(self, dst_inner, dst_outer):
"""Create packet header: IPv6 encapsulated in IPv6:
IPv6 header, IPv6 header, UDP header
:param ipv6address dst_inner: inner IPv6 destination address
:param ipv6address dst_outer: outer IPv6 destination address
IPv6 source addresses are 1234::1 and 4321::1
UDP source port and destination port are 1234
"""
p = (IPv6(src='1234::1', dst=dst_outer) /
IPv6(src='4321::1', dst=dst_inner) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_IPv6_SRH_SRH_IPv6(self, dst, sidlist1, segleft1,
sidlist2, segleft2):
"""Create packet header: IPv6 encapsulated in SRv6 with 2 SRH:
IPv6 header with SRH, 2nd SRH, IPv6 header, UDP header
:param ipv6address dst: inner IPv6 destination address
:param list sidlist1: segment list of outer IPv6 SRH
:param int segleft1: segments-left field of outer IPv6 SRH
:param list sidlist2: segment list of inner IPv6 SRH
:param int segleft2: segments-left field of inner IPv6 SRH
Outer IPv6 destination address is set to sidlist[segleft]
IPv6 source addresses are 1234::1 and 4321::1
UDP source port and destination port are 1234
"""
p = (IPv6(src='1234::1', dst=sidlist1[segleft1]) /
IPv6ExtHdrSegmentRouting(addresses=sidlist1,
segleft=segleft1, nh=43) /
IPv6ExtHdrSegmentRouting(addresses=sidlist2,
segleft=segleft2, nh=41) /
IPv6(src='4321::1', dst=dst) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_IPv4(self, dst):
"""Create packet header: IPv4 header, UDP header
:param dst: IPv4 destination address
IPv4 source address is 123.1.1.1
UDP source port and destination port are 1234
"""
p = (IP(src='123.1.1.1', dst=dst) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_IPv6_IPv4(self, dst_inner, dst_outer):
"""Create packet header: IPv4 encapsulated in IPv6:
IPv6 header, IPv4 header, UDP header
:param ipv4address dst_inner: inner IPv4 destination address
:param ipv6address dst_outer: outer IPv6 destination address
IPv6 source address is 1234::1
IPv4 source address is 123.1.1.1
UDP source port and destination port are 1234
"""
p = (IPv6(src='1234::1', dst=dst_outer) /
IP(src='123.1.1.1', dst=dst_inner) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_IPv6_SRH_IPv4(self, dst, sidlist, segleft):
"""Create packet header: IPv4 encapsulated in SRv6:
IPv6 header with SRH, IPv4 header, UDP header
:param ipv4address dst: inner IPv4 destination address
:param list sidlist: segment list of outer IPv6 SRH
:param int segleft: segments-left field of outer IPv6 SRH
Outer IPv6 destination address is set to sidlist[segleft]
IPv6 source address is 1234::1
IPv4 source address is 123.1.1.1
UDP source port and destination port are 1234
"""
p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
IPv6ExtHdrSegmentRouting(addresses=sidlist,
segleft=segleft, nh=4) /
IP(src='123.1.1.1', dst=dst) /
UDP(sport=1234, dport=1234))
return p
def create_packet_header_L2(self, vlan=0):
"""Create packet header: L2 header
:param vlan: if vlan!=0 then add 802.1q header
"""
# Note: the dst addr ('00:55:44:33:22:11') is used in
# the compare function compare_rx_tx_packet_T_Encaps_L2
# to detect presence of L2 in SRH payload
p = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
etype = 0x8137 # IPX
if vlan:
# add 802.1q layer
p /= Dot1Q(vlan=vlan, type=etype)
else:
p.type = etype
return p
def create_packet_header_IPv6_SRH_L2(self, sidlist, segleft, vlan=0):
"""Create packet header: L2 encapsulated in SRv6:
IPv6 header with SRH, L2
:param list sidlist: segment list of outer IPv6 SRH
:param int segleft: segments-left field of outer IPv6 SRH
:param vlan: L2 vlan; if vlan!=0 then add 802.1q header
Outer IPv6 destination address is set to sidlist[segleft]
IPv6 source address is 1234::1
"""
eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
etype = 0x8137 # IPX
if vlan:
# add 802.1q layer
eth /= Dot1Q(vlan=vlan, type=etype)
else:
eth.type = etype
p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
IPv6ExtHdrSegmentRouting(addresses=sidlist,
segleft=segleft, nh=59) /
eth)
return p
def create_packet_header_IPv6_L2(self, dst_outer, vlan=0):
"""Create packet header: L2 encapsulated in IPv6:
IPv6 header, L2
:param ipv6address dst_outer: outer IPv6 destination address
:param vlan: L2 vlan; if vlan!=0 then add 802.1q header
"""
eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
etype = 0x8137 # IPX
if vlan:
# add 802.1q layer
eth /= Dot1Q(vlan=vlan, type=etype)
else:
eth.type = etype
p = (IPv6(src='1234::1', dst=dst_outer, nh=59) / eth)
return p
def get_payload_info(self, packet):
""" Extract the payload_info from the packet
"""
# in most cases, payload_info is in packet[Raw]
# but packet[Raw] gives the complete payload
# (incl L2 header) for the T.Encaps L2 case
try:
payload_info = self.payload_to_info(str(packet[Raw]))
except:
# remote L2 header from packet[Raw]:
# take packet[Raw], convert it to an Ether layer
# and then extract Raw from it
payload_info = self.payload_to_info(
str(Ether(str(packet[Raw]))[Raw]))
return payload_info
def verify_captured_pkts(self, dst_if, capture, compare_func):
"""
Verify captured packet stream for specified interface.
Compare ingress with egress packets using the specified compare fn
:param dst_if: egress interface of DUT
:param capture: captured packets
:param compare_func: function to compare in and out packet
"""
self.logger.info("Verifying capture on interface %s using function %s"
% (dst_if.name, compare_func.func_name))
last_info = dict()
for i in self.pg_interfaces:
last_info[i.sw_if_index] = None
dst_sw_if_index = dst_if.sw_if_index
for packet in capture:
try:
# extract payload_info from packet's payload
payload_info = self.get_payload_info(packet)
packet_index = payload_info.index
self.logger.debug("Verifying packet with index %d"
% (packet_index))
# packet should have arrived on the expected interface
self.assertEqual(payload_info.dst, dst_sw_if_index)
self.logger.debug(
"Got packet on interface %s: src=%u (idx=%u)" %
(dst_if.name, payload_info.src, packet_index))
# search for payload_info with same src and dst if_index
# this will give us the transmitted packet
next_info = self.get_next_packet_info_for_interface2(
payload_info.src, dst_sw_if_index,
last_info[payload_info.src])
last_info[payload_info.src] = next_info
# next_info should not be None
self.assertTrue(next_info is not None)
# index of tx and rx packets should be equal
self.assertEqual(packet_index, next_info.index)
# data field of next_info contains the tx packet
txed_packet = next_info.data
self.logger.debug(ppp("Transmitted packet:",
txed_packet)) # ppp=Pretty Print Packet
self.logger.debug(ppp("Received packet:", packet))
# compare rcvd packet with expected packet using compare_func
compare_func(txed_packet, packet)
except:
print packet.command()
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
# have all expected packets arrived?
for i in self.pg_interfaces:
remaining_packet = self.get_next_packet_info_for_interface2(
i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
self.assertTrue(remaining_packet is None,
"Interface %s: Packet expected from interface %s "
"didn't arrive" % (dst_if.name, i.name))
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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