blob: 1432858f38cdd1dbed272116d1cc228b0fa74c89 [file] [log] [blame]
#!/usr/bin/env python
import unittest
from socket import AF_INET6
from framework import VppTestCase, VppTestRunner
from vpp_sub_interface import VppSubInterface, VppDot1QSubint
from vpp_pg_interface import is_ipv6_misc
from vpp_ip_route import VppIpRoute, VppRoutePath, find_route, VppIpMRoute, \
VppMRoutePath, MRouteItfFlags, MRouteEntryFlags, VppMplsIpBind, \
VppMplsRoute
from vpp_neighbor import find_nbr, VppNeighbor
from scapy.packet import Raw
from scapy.layers.l2 import Ether, Dot1Q
from scapy.layers.inet6 import IPv6, UDP, ICMPv6ND_NS, ICMPv6ND_RS, \
ICMPv6ND_RA, ICMPv6NDOptSrcLLAddr, getmacbyip6, ICMPv6MRD_Solicitation, \
ICMPv6NDOptMTU, ICMPv6NDOptSrcLLAddr, ICMPv6NDOptPrefixInfo, \
ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, ICMPv6DestUnreach, icmp6types
from util import ppp
from scapy.utils6 import in6_getnsma, in6_getnsmac, in6_ptop, in6_islladdr, \
in6_mactoifaceid, in6_ismaddr
from scapy.utils import inet_pton, inet_ntop
from scapy.contrib.mpls import MPLS
def mk_ll_addr(mac):
euid = in6_mactoifaceid(mac)
addr = "fe80::" + euid
return addr
class TestIPv6ND(VppTestCase):
def validate_ra(self, intf, rx, dst_ip=None):
if not dst_ip:
dst_ip = intf.remote_ip6
# unicasted packets must come to the unicast mac
self.assertEqual(rx[Ether].dst, intf.remote_mac)
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd RA should be addressed to the sender's source
self.assertTrue(rx.haslayer(ICMPv6ND_RA))
self.assertEqual(in6_ptop(rx[IPv6].dst),
in6_ptop(dst_ip))
# and come from the router's link local
self.assertTrue(in6_islladdr(rx[IPv6].src))
self.assertEqual(in6_ptop(rx[IPv6].src),
in6_ptop(mk_ll_addr(intf.local_mac)))
def validate_na(self, intf, rx, dst_ip=None, tgt_ip=None):
if not dst_ip:
dst_ip = intf.remote_ip6
if not tgt_ip:
dst_ip = intf.local_ip6
# unicasted packets must come to the unicast mac
self.assertEqual(rx[Ether].dst, intf.remote_mac)
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd NA should be addressed to the sender's source
self.assertTrue(rx.haslayer(ICMPv6ND_NA))
self.assertEqual(in6_ptop(rx[IPv6].dst),
in6_ptop(dst_ip))
# and come from the target address
self.assertEqual(in6_ptop(rx[IPv6].src), in6_ptop(tgt_ip))
# Dest link-layer options should have the router's MAC
dll = rx[ICMPv6NDOptDstLLAddr]
self.assertEqual(dll.lladdr, intf.local_mac)
def validate_ns(self, intf, rx, tgt_ip):
nsma = in6_getnsma(inet_pton(AF_INET6, tgt_ip))
dst_ip = inet_ntop(AF_INET6, nsma)
# NS is broadcast
self.assertEqual(rx[Ether].dst, "ff:ff:ff:ff:ff:ff")
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd NS should be addressed to an mcast address
# derived from the target address
self.assertEqual(in6_ptop(rx[IPv6].dst), in6_ptop(dst_ip))
# expect the tgt IP in the NS header
ns = rx[ICMPv6ND_NS]
self.assertEqual(in6_ptop(ns.tgt), in6_ptop(tgt_ip))
# packet is from the router's local address
self.assertEqual(in6_ptop(rx[IPv6].src), intf.local_ip6)
# Src link-layer options should have the router's MAC
sll = rx[ICMPv6NDOptSrcLLAddr]
self.assertEqual(sll.lladdr, intf.local_mac)
def send_and_expect_ra(self, intf, pkts, remark, dst_ip=None,
filter_out_fn=is_ipv6_misc):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_ra(intf, rx, dst_ip)
def send_and_expect_na(self, intf, pkts, remark, dst_ip=None,
tgt_ip=None,
filter_out_fn=is_ipv6_misc):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_na(intf, rx, dst_ip, tgt_ip)
def send_and_expect_ns(self, tx_intf, rx_intf, pkts, tgt_ip,
filter_out_fn=is_ipv6_misc):
tx_intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = rx_intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_ns(rx_intf, rx, tgt_ip)
def send_and_assert_no_replies(self, intf, pkts, remark):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces:
i.get_capture(0)
i.assert_nothing_captured(remark=remark)
def verify_ip(self, rx, smac, dmac, sip, dip):
ether = rx[Ether]
self.assertEqual(ether.dst, dmac)
self.assertEqual(ether.src, smac)
ip = rx[IPv6]
self.assertEqual(ip.src, sip)
self.assertEqual(ip.dst, dip)
class TestIPv6(TestIPv6ND):
""" IPv6 Test Case """
@classmethod
def setUpClass(cls):
super(TestIPv6, cls).setUpClass()
def setUp(self):
"""
Perform test setup before test case.
**Config:**
- create 3 pg interfaces
- untagged pg0 interface
- Dot1Q subinterface on pg1
- Dot1AD subinterface on pg2
- setup interfaces:
- put it into UP state
- set IPv6 addresses
- resolve neighbor address using NDP
- configure 200 fib entries
:ivar list interfaces: pg interfaces and subinterfaces.
:ivar dict flows: IPv4 packet flows in test.
:ivar list pg_if_packet_sizes: packet sizes in test.
*TODO:* Create AD sub interface
"""
super(TestIPv6, self).setUp()
# create 3 pg interfaces
self.create_pg_interfaces(range(3))
# create 2 subinterfaces for p1 and pg2
self.sub_interfaces = [
VppDot1QSubint(self, self.pg1, 100),
VppDot1QSubint(self, self.pg2, 200)
# TODO: VppDot1ADSubint(self, self.pg2, 200, 300, 400)
]
# packet flows mapping pg0 -> pg1.sub, pg2.sub, etc.
self.flows = dict()
self.flows[self.pg0] = [self.pg1.sub_if, self.pg2.sub_if]
self.flows[self.pg1.sub_if] = [self.pg0, self.pg2.sub_if]
self.flows[self.pg2.sub_if] = [self.pg0, self.pg1.sub_if]
# packet sizes
self.pg_if_packet_sizes = [64, 512, 1518, 9018]
self.sub_if_packet_sizes = [64, 512, 1518 + 4, 9018 + 4]
self.interfaces = list(self.pg_interfaces)
self.interfaces.extend(self.sub_interfaces)
# setup all interfaces
for i in self.interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
# config 2M FIB entries
self.config_fib_entries(200)
def tearDown(self):
"""Run standard test teardown and log ``show ip6 neighbors``."""
for i in self.sub_interfaces:
i.unconfig_ip6()
i.ip6_disable()
i.admin_down()
i.remove_vpp_config()
super(TestIPv6, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.cli("show ip6 neighbors"))
# info(self.vapi.cli("show ip6 fib")) # many entries
def config_fib_entries(self, count):
"""For each interface add to the FIB table *count* routes to
"fd02::1/128" destination with interface's local address as next-hop
address.
:param int count: Number of FIB entries.
- *TODO:* check if the next-hop address shouldn't be remote address
instead of local address.
"""
n_int = len(self.interfaces)
percent = 0
counter = 0.0
dest_addr = inet_pton(AF_INET6, "fd02::1")
dest_addr_len = 128
for i in self.interfaces:
next_hop_address = i.local_ip6n
for j in range(count / n_int):
self.vapi.ip_add_del_route(
dest_addr, dest_addr_len, next_hop_address, is_ipv6=1)
counter += 1
if counter / count * 100 > percent:
self.logger.info("Configure %d FIB entries .. %d%% done" %
(count, percent))
percent += 1
def create_stream(self, src_if, packet_sizes):
"""Create input packet stream for defined interface.
:param VppInterface src_if: Interface to create packet stream for.
:param list packet_sizes: Required packet sizes.
"""
pkts = []
for i in range(0, 257):
dst_if = self.flows[src_if][i % 2]
info = self.create_packet_info(src_if, dst_if)
payload = self.info_to_payload(info)
p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
IPv6(src=src_if.remote_ip6, dst=dst_if.remote_ip6) /
UDP(sport=1234, dport=1234) /
Raw(payload))
info.data = p.copy()
if isinstance(src_if, VppSubInterface):
p = src_if.add_dot1_layer(p)
size = packet_sizes[(i // 2) % len(packet_sizes)]
self.extend_packet(p, size)
pkts.append(p)
return pkts
def verify_capture(self, dst_if, capture):
"""Verify captured input packet stream for defined interface.
:param VppInterface dst_if: Interface to verify captured packet stream
for.
:param list capture: Captured packet stream.
"""
self.logger.info("Verifying capture on interface %s" % dst_if.name)
last_info = dict()
for i in self.interfaces:
last_info[i.sw_if_index] = None
is_sub_if = False
dst_sw_if_index = dst_if.sw_if_index
if hasattr(dst_if, 'parent'):
is_sub_if = True
for packet in capture:
if is_sub_if:
# Check VLAN tags and Ethernet header
packet = dst_if.remove_dot1_layer(packet)
self.assertTrue(Dot1Q not in packet)
try:
ip = packet[IPv6]
udp = packet[UDP]
payload_info = self.payload_to_info(str(packet[Raw]))
packet_index = payload_info.index
self.assertEqual(payload_info.dst, dst_sw_if_index)
self.logger.debug(
"Got packet on port %s: src=%u (id=%u)" %
(dst_if.name, payload_info.src, packet_index))
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
self.assertTrue(next_info is not None)
self.assertEqual(packet_index, next_info.index)
saved_packet = next_info.data
# Check standard fields
self.assertEqual(ip.src, saved_packet[IPv6].src)
self.assertEqual(ip.dst, saved_packet[IPv6].dst)
self.assertEqual(udp.sport, saved_packet[UDP].sport)
self.assertEqual(udp.dport, saved_packet[UDP].dport)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
for i in self.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))
def test_fib(self):
""" IPv6 FIB test
Test scenario:
- Create IPv6 stream for pg0 interface
- Create IPv6 tagged streams for pg1's and pg2's subinterface.
- Send and verify received packets on each interface.
"""
pkts = self.create_stream(self.pg0, self.pg_if_packet_sizes)
self.pg0.add_stream(pkts)
for i in self.sub_interfaces:
pkts = self.create_stream(i, self.sub_if_packet_sizes)
i.parent.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
pkts = self.pg0.get_capture()
self.verify_capture(self.pg0, pkts)
for i in self.sub_interfaces:
pkts = i.parent.get_capture()
self.verify_capture(i, pkts)
def test_ns(self):
""" IPv6 Neighbour Solicitation Exceptions
Test scenario:
- Send an NS Sourced from an address not covered by the link sub-net
- Send an NS to an mcast address the router has not joined
- Send NS for a target address the router does not onn.
"""
#
# An NS from a non link source address
#
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src="2002::2") /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(
self.pg0, pkts,
"No response to NS source by address not on sub-net")
#
# An NS for sent to a solicited mcast group the router is
# not a member of FAILS
#
if 0:
nsma = in6_getnsma(inet_pton(AF_INET6, "fd::ffff"))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(
self.pg0, pkts,
"No response to NS sent to unjoined mcast address")
#
# An NS whose target address is one the router does not own
#
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(tgt="fd::ffff") /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(self.pg0, pkts,
"No response to NS for unknown target")
#
# A neighbor entry that has no associated FIB-entry
#
self.pg0.generate_remote_hosts(4)
nd_entry = VppNeighbor(self,
self.pg0.sw_if_index,
self.pg0.remote_hosts[2].mac,
self.pg0.remote_hosts[2].ip6,
af=AF_INET6,
is_no_fib_entry=1)
nd_entry.add_vpp_config()
#
# check we have the neighbor, but no route
#
self.assertTrue(find_nbr(self,
self.pg0.sw_if_index,
self.pg0._remote_hosts[2].ip6,
inet=AF_INET6))
self.assertFalse(find_route(self,
self.pg0._remote_hosts[2].ip6,
128,
inet=AF_INET6))
#
# send an NS from a link local address to the interface's global
# address
#
p = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) /
IPv6(dst=d, src=self.pg0._remote_hosts[2].ip6_ll) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
self.send_and_expect_na(self.pg0, p,
"NS from link-local",
dst_ip=self.pg0._remote_hosts[2].ip6_ll,
tgt_ip=self.pg0.local_ip6)
#
# we should have learned an ND entry for the peer's link-local
# but not inserted a route to it in the FIB
#
self.assertTrue(find_nbr(self,
self.pg0.sw_if_index,
self.pg0._remote_hosts[2].ip6_ll,
inet=AF_INET6))
self.assertFalse(find_route(self,
self.pg0._remote_hosts[2].ip6_ll,
128,
inet=AF_INET6))
#
# An NS to the router's own Link-local
#
p = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) /
IPv6(dst=d, src=self.pg0._remote_hosts[3].ip6_ll) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6_ll) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
self.send_and_expect_na(self.pg0, p,
"NS to/from link-local",
dst_ip=self.pg0._remote_hosts[3].ip6_ll,
tgt_ip=self.pg0.local_ip6_ll)
#
# we should have learned an ND entry for the peer's link-local
# but not inserted a route to it in the FIB
#
self.assertTrue(find_nbr(self,
self.pg0.sw_if_index,
self.pg0._remote_hosts[3].ip6_ll,
inet=AF_INET6))
self.assertFalse(find_route(self,
self.pg0._remote_hosts[3].ip6_ll,
128,
inet=AF_INET6))
def test_ns_duplicates(self):
""" ARP Duplicates"""
#
# Generate some hosts on the LAN
#
self.pg1.generate_remote_hosts(3)
#
# Add host 1 on pg1 and pg2
#
ns_pg1 = VppNeighbor(self,
self.pg1.sw_if_index,
self.pg1.remote_hosts[1].mac,
self.pg1.remote_hosts[1].ip6,
af=AF_INET6)
ns_pg1.add_vpp_config()
ns_pg2 = VppNeighbor(self,
self.pg2.sw_if_index,
self.pg2.remote_mac,
self.pg1.remote_hosts[1].ip6,
af=AF_INET6)
ns_pg2.add_vpp_config()
#
# IP packet destined for pg1 remote host arrives on pg1 again.
#
p = (Ether(dst=self.pg0.local_mac,
src=self.pg0.remote_mac) /
IPv6(src=self.pg0.remote_ip6,
dst=self.pg1.remote_hosts[1].ip6) /
UDP(sport=1234, dport=1234) /
Raw())
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx1 = self.pg1.get_capture(1)
self.verify_ip(rx1[0],
self.pg1.local_mac,
self.pg1.remote_hosts[1].mac,
self.pg0.remote_ip6,
self.pg1.remote_hosts[1].ip6)
#
# remove the duplicate on pg1
# packet stream shoud generate ARPs out of pg1
#
ns_pg1.remove_vpp_config()
self.send_and_expect_ns(self.pg0, self.pg1,
p, self.pg1.remote_hosts[1].ip6)
#
# Add it back
#
ns_pg1.add_vpp_config()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx1 = self.pg1.get_capture(1)
self.verify_ip(rx1[0],
self.pg1.local_mac,
self.pg1.remote_hosts[1].mac,
self.pg0.remote_ip6,
self.pg1.remote_hosts[1].ip6)
def validate_ra(self, intf, rx, dst_ip=None, mtu=9000, pi_opt=None):
if not dst_ip:
dst_ip = intf.remote_ip6
# unicasted packets must come to the unicast mac
self.assertEqual(rx[Ether].dst, intf.remote_mac)
# and from the router's MAC
self.assertEqual(rx[Ether].src, intf.local_mac)
# the rx'd RA should be addressed to the sender's source
self.assertTrue(rx.haslayer(ICMPv6ND_RA))
self.assertEqual(in6_ptop(rx[IPv6].dst),
in6_ptop(dst_ip))
# and come from the router's link local
self.assertTrue(in6_islladdr(rx[IPv6].src))
self.assertEqual(in6_ptop(rx[IPv6].src),
in6_ptop(mk_ll_addr(intf.local_mac)))
# it should contain the links MTU
ra = rx[ICMPv6ND_RA]
self.assertEqual(ra[ICMPv6NDOptMTU].mtu, mtu)
# it should contain the source's link layer address option
sll = ra[ICMPv6NDOptSrcLLAddr]
self.assertEqual(sll.lladdr, intf.local_mac)
if not pi_opt:
# the RA should not contain prefix information
self.assertFalse(ra.haslayer(ICMPv6NDOptPrefixInfo))
else:
raos = rx.getlayer(ICMPv6NDOptPrefixInfo, 1)
# the options are nested in the scapy packet in way that i cannot
# decipher how to decode. this 1st layer of option always returns
# nested classes, so a direct obj1=obj2 comparison always fails.
# however, the getlayer(.., 2) does give one instnace.
# so we cheat here and construct a new opt instnace for comparison
rd = ICMPv6NDOptPrefixInfo(prefixlen=raos.prefixlen,
prefix=raos.prefix,
L=raos.L,
A=raos.A)
if type(pi_opt) is list:
for ii in range(len(pi_opt)):
self.assertEqual(pi_opt[ii], rd)
rd = rx.getlayer(ICMPv6NDOptPrefixInfo, ii+2)
else:
self.assertEqual(pi_opt, raos)
def send_and_expect_ra(self, intf, pkts, remark, dst_ip=None,
filter_out_fn=is_ipv6_misc,
opt=None):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = intf.get_capture(1, filter_out_fn=filter_out_fn)
self.assertEqual(len(rx), 1)
rx = rx[0]
self.validate_ra(intf, rx, dst_ip, pi_opt=opt)
def test_rs(self):
""" IPv6 Router Solicitation Exceptions
Test scenario:
"""
#
# Before we begin change the IPv6 RA responses to use the unicast
# address - that way we will not confuse them with the periodic
# RAs which go to the mcast address
# Sit and wait for the first periodic RA.
#
# TODO
#
self.pg0.ip6_ra_config(send_unicast=1)
#
# An RS from a link source address
# - expect an RA in return
#
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts, "Genuine RS")
#
# For the next RS sent the RA should be rate limited
#
self.send_and_assert_no_replies(self.pg0, pkts, "RA rate limited")
#
# When we reconfiure the IPv6 RA config, we reset the RA rate limiting,
# so we need to do this before each test below so as not to drop
# packets for rate limiting reasons. Test this works here.
#
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, pkts, "Rate limit reset RS")
#
# An RS sent from a non-link local source
#
self.pg0.ip6_ra_config(send_unicast=1)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src="2002::ffff") /
ICMPv6ND_RS())
pkts = [p]
self.send_and_assert_no_replies(self.pg0, pkts,
"RS from non-link source")
#
# Source an RS from a link local address
#
self.pg0.ip6_ra_config(send_unicast=1)
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=ll) /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts,
"RS sourced from link-local",
dst_ip=ll)
#
# Send the RS multicast
#
self.pg0.ip6_ra_config(send_unicast=1)
dmac = in6_getnsmac(inet_pton(AF_INET6, "ff02::2"))
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=dmac, src=self.pg0.remote_mac) /
IPv6(dst="ff02::2", src=ll) /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts,
"RS sourced from link-local",
dst_ip=ll)
#
# Source from the unspecified address ::. This happens when the RS
# is sent before the host has a configured address/sub-net,
# i.e. auto-config. Since the sender has no IP address, the reply
# comes back mcast - so the capture needs to not filter this.
# If we happen to pick up the periodic RA at this point then so be it,
# it's not an error.
#
self.pg0.ip6_ra_config(send_unicast=1, suppress=1)
p = (Ether(dst=dmac, src=self.pg0.remote_mac) /
IPv6(dst="ff02::2", src="::") /
ICMPv6ND_RS())
pkts = [p]
self.send_and_expect_ra(self.pg0, pkts,
"RS sourced from unspecified",
dst_ip="ff02::1",
filter_out_fn=None)
#
# Configure The RA to announce the links prefix
#
self.pg0.ip6_ra_prefix(self.pg0.local_ip6n,
self.pg0.local_ip6_prefix_len)
#
# RAs should now contain the prefix information option
#
opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=ll) /
ICMPv6ND_RS())
self.send_and_expect_ra(self.pg0, p,
"RA with prefix-info",
dst_ip=ll,
opt=opt)
#
# Change the prefix info to not off-link
# L-flag is clear
#
self.pg0.ip6_ra_prefix(self.pg0.local_ip6n,
self.pg0.local_ip6_prefix_len,
off_link=1)
opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=0,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info with L-flag=0",
dst_ip=ll,
opt=opt)
#
# Change the prefix info to not off-link, no-autoconfig
# L and A flag are clear in the advert
#
self.pg0.ip6_ra_prefix(self.pg0.local_ip6n,
self.pg0.local_ip6_prefix_len,
off_link=1,
no_autoconfig=1)
opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=0,
A=0)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info with A & L-flag=0",
dst_ip=ll,
opt=opt)
#
# Change the flag settings back to the defaults
# L and A flag are set in the advert
#
self.pg0.ip6_ra_prefix(self.pg0.local_ip6n,
self.pg0.local_ip6_prefix_len)
opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info",
dst_ip=ll,
opt=opt)
#
# Change the prefix info to not off-link, no-autoconfig
# L and A flag are clear in the advert
#
self.pg0.ip6_ra_prefix(self.pg0.local_ip6n,
self.pg0.local_ip6_prefix_len,
off_link=1,
no_autoconfig=1)
opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=0,
A=0)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix info with A & L-flag=0",
dst_ip=ll,
opt=opt)
#
# Use the reset to defults option to revert to defaults
# L and A flag are clear in the advert
#
self.pg0.ip6_ra_prefix(self.pg0.local_ip6n,
self.pg0.local_ip6_prefix_len,
use_default=1)
opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix reverted to defaults",
dst_ip=ll,
opt=opt)
#
# Advertise Another prefix. With no L-flag/A-flag
#
self.pg0.ip6_ra_prefix(self.pg1.local_ip6n,
self.pg1.local_ip6_prefix_len,
off_link=1,
no_autoconfig=1)
opt = [ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len,
prefix=self.pg0.local_ip6,
L=1,
A=1),
ICMPv6NDOptPrefixInfo(prefixlen=self.pg1.local_ip6_prefix_len,
prefix=self.pg1.local_ip6,
L=0,
A=0)]
self.pg0.ip6_ra_config(send_unicast=1)
ll = mk_ll_addr(self.pg0.remote_mac)
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=ll) /
ICMPv6ND_RS())
self.send_and_expect_ra(self.pg0, p,
"RA with multiple Prefix infos",
dst_ip=ll,
opt=opt)
#
# Remove the first refix-info - expect the second is still in the
# advert
#
self.pg0.ip6_ra_prefix(self.pg0.local_ip6n,
self.pg0.local_ip6_prefix_len,
is_no=1)
opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg1.local_ip6_prefix_len,
prefix=self.pg1.local_ip6,
L=0,
A=0)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix reverted to defaults",
dst_ip=ll,
opt=opt)
#
# Remove the second prefix-info - expect no prefix-info i nthe adverts
#
self.pg0.ip6_ra_prefix(self.pg1.local_ip6n,
self.pg1.local_ip6_prefix_len,
is_no=1)
self.pg0.ip6_ra_config(send_unicast=1)
self.send_and_expect_ra(self.pg0, p,
"RA with Prefix reverted to defaults",
dst_ip=ll)
#
# Reset the periodic advertisements back to default values
#
self.pg0.ip6_ra_config(no=1, suppress=1, send_unicast=0)
class IPv6NDProxyTest(TestIPv6ND):
""" IPv6 ND ProxyTest Case """
def setUp(self):
super(IPv6NDProxyTest, self).setUp()
# create 3 pg interfaces
self.create_pg_interfaces(range(3))
# pg0 is the master interface, with the configured subnet
self.pg0.admin_up()
self.pg0.config_ip6()
self.pg0.resolve_ndp()
self.pg1.ip6_enable()
self.pg2.ip6_enable()
def tearDown(self):
super(IPv6NDProxyTest, self).tearDown()
def test_nd_proxy(self):
""" IPv6 Proxy ND """
#
# Generate some hosts in the subnet that we are proxying
#
self.pg0.generate_remote_hosts(8)
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
#
# Send an NS for one of those remote hosts on one of the proxy links
# expect no response since it's from an address that is not
# on the link that has the prefix configured
#
ns_pg1 = (Ether(dst=in6_getnsmac(nsma), src=self.pg1.remote_mac) /
IPv6(dst=d, src=self.pg0._remote_hosts[2].ip6) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0._remote_hosts[2].mac))
self.send_and_assert_no_replies(self.pg1, ns_pg1, "Off link NS")
#
# Add proxy support for the host
#
self.vapi.ip6_nd_proxy(
inet_pton(AF_INET6, self.pg0._remote_hosts[2].ip6),
self.pg1.sw_if_index)
#
# try that NS again. this time we expect an NA back
#
self.send_and_expect_na(self.pg1, ns_pg1,
"NS to proxy entry",
dst_ip=self.pg0._remote_hosts[2].ip6,
tgt_ip=self.pg0.local_ip6)
#
# ... and that we have an entry in the ND cache
#
self.assertTrue(find_nbr(self,
self.pg1.sw_if_index,
self.pg0._remote_hosts[2].ip6,
inet=AF_INET6))
#
# ... and we can route traffic to it
#
t = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0._remote_hosts[2].ip6,
src=self.pg0.remote_ip6) /
UDP(sport=10000, dport=20000) /
Raw('\xa5' * 100))
self.pg0.add_stream(t)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.assertEqual(rx[Ether].dst, self.pg0._remote_hosts[2].mac)
self.assertEqual(rx[Ether].src, self.pg1.local_mac)
self.assertEqual(rx[IPv6].src, t[IPv6].src)
self.assertEqual(rx[IPv6].dst, t[IPv6].dst)
#
# Test we proxy for the host on the main interface
#
ns_pg0 = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(tgt=self.pg0._remote_hosts[2].ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
self.send_and_expect_na(self.pg0, ns_pg0,
"NS to proxy entry on main",
tgt_ip=self.pg0._remote_hosts[2].ip6,
dst_ip=self.pg0.remote_ip6)
#
# Setup and resolve proxy for another host on another interface
#
ns_pg2 = (Ether(dst=in6_getnsmac(nsma), src=self.pg2.remote_mac) /
IPv6(dst=d, src=self.pg0._remote_hosts[3].ip6) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0._remote_hosts[2].mac))
self.vapi.ip6_nd_proxy(
inet_pton(AF_INET6, self.pg0._remote_hosts[3].ip6),
self.pg2.sw_if_index)
self.send_and_expect_na(self.pg2, ns_pg2,
"NS to proxy entry other interface",
dst_ip=self.pg0._remote_hosts[3].ip6,
tgt_ip=self.pg0.local_ip6)
self.assertTrue(find_nbr(self,
self.pg2.sw_if_index,
self.pg0._remote_hosts[3].ip6,
inet=AF_INET6))
#
# hosts can communicate. pg2->pg1
#
t2 = (Ether(dst=self.pg2.local_mac,
src=self.pg0.remote_hosts[3].mac) /
IPv6(dst=self.pg0._remote_hosts[2].ip6,
src=self.pg0._remote_hosts[3].ip6) /
UDP(sport=10000, dport=20000) /
Raw('\xa5' * 100))
self.pg2.add_stream(t2)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.assertEqual(rx[Ether].dst, self.pg0._remote_hosts[2].mac)
self.assertEqual(rx[Ether].src, self.pg1.local_mac)
self.assertEqual(rx[IPv6].src, t2[IPv6].src)
self.assertEqual(rx[IPv6].dst, t2[IPv6].dst)
#
# remove the proxy configs
#
self.vapi.ip6_nd_proxy(
inet_pton(AF_INET6, self.pg0._remote_hosts[2].ip6),
self.pg1.sw_if_index,
is_del=1)
self.vapi.ip6_nd_proxy(
inet_pton(AF_INET6, self.pg0._remote_hosts[3].ip6),
self.pg2.sw_if_index,
is_del=1)
self.assertFalse(find_nbr(self,
self.pg2.sw_if_index,
self.pg0._remote_hosts[3].ip6,
inet=AF_INET6))
self.assertFalse(find_nbr(self,
self.pg1.sw_if_index,
self.pg0._remote_hosts[2].ip6,
inet=AF_INET6))
#
# no longer proxy-ing...
#
self.send_and_assert_no_replies(self.pg0, ns_pg0, "Proxy unconfigured")
self.send_and_assert_no_replies(self.pg1, ns_pg1, "Proxy unconfigured")
self.send_and_assert_no_replies(self.pg2, ns_pg2, "Proxy unconfigured")
#
# no longer forwarding. traffic generates NS out of the glean/main
# interface
#
self.pg2.add_stream(t2)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
self.assertTrue(rx[0].haslayer(ICMPv6ND_NS))
class TestIPNull(VppTestCase):
""" IPv6 routes via NULL """
def setUp(self):
super(TestIPNull, self).setUp()
# create 2 pg interfaces
self.create_pg_interfaces(range(1))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TestIPNull, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
def test_ip_null(self):
""" IP NULL route """
p = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src=self.pg0.remote_ip6, dst="2001::1") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
#
# A route via IP NULL that will reply with ICMP unreachables
#
ip_unreach = VppIpRoute(self, "2001::", 64, [], is_unreach=1, is_ip6=1)
ip_unreach.add_vpp_config()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
icmp = rx[ICMPv6DestUnreach]
# 0 = "No route to destination"
self.assertEqual(icmp.code, 0)
# ICMP is rate limited. pause a bit
self.sleep(1)
#
# A route via IP NULL that will reply with ICMP prohibited
#
ip_prohibit = VppIpRoute(self, "2001::1", 128, [],
is_prohibit=1, is_ip6=1)
ip_prohibit.add_vpp_config()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
icmp = rx[ICMPv6DestUnreach]
# 1 = "Communication with destination administratively prohibited"
self.assertEqual(icmp.code, 1)
class TestIPDisabled(VppTestCase):
""" IPv6 disabled """
def setUp(self):
super(TestIPDisabled, self).setUp()
# create 2 pg interfaces
self.create_pg_interfaces(range(2))
# PG0 is IP enalbed
self.pg0.admin_up()
self.pg0.config_ip6()
self.pg0.resolve_ndp()
# PG 1 is not IP enabled
self.pg1.admin_up()
def tearDown(self):
super(TestIPDisabled, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip4()
i.admin_down()
def send_and_assert_no_replies(self, intf, pkts, remark):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces:
i.get_capture(0)
i.assert_nothing_captured(remark=remark)
def test_ip_disabled(self):
""" IP Disabled """
#
# An (S,G).
# one accepting interface, pg0, 2 forwarding interfaces
#
route_ff_01 = VppIpMRoute(
self,
"::",
"ffef::1", 128,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[VppMRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
VppMRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)],
is_ip6=1)
route_ff_01.add_vpp_config()
pu = (Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac) /
IPv6(src="2001::1", dst=self.pg0.remote_ip6) /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
pm = (Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac) /
IPv6(src="2001::1", dst="ffef::1") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
#
# PG1 does not forward IP traffic
#
self.send_and_assert_no_replies(self.pg1, pu, "IPv6 disabled")
self.send_and_assert_no_replies(self.pg1, pm, "IPv6 disabled")
#
# IP enable PG1
#
self.pg1.config_ip6()
#
# Now we get packets through
#
self.pg1.add_stream(pu)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
self.pg1.add_stream(pm)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
#
# Disable PG1
#
self.pg1.unconfig_ip6()
#
# PG1 does not forward IP traffic
#
self.send_and_assert_no_replies(self.pg1, pu, "IPv6 disabled")
self.send_and_assert_no_replies(self.pg1, pm, "IPv6 disabled")
class TestIP6LoadBalance(VppTestCase):
""" IPv6 Load-Balancing """
def setUp(self):
super(TestIP6LoadBalance, self).setUp()
self.create_pg_interfaces(range(5))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip6()
i.resolve_ndp()
i.enable_mpls()
def tearDown(self):
super(TestIP6LoadBalance, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip6()
i.admin_down()
i.disable_mpls()
def send_and_expect_load_balancing(self, input, pkts, outputs):
input.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for oo in outputs:
rx = oo._get_capture(1)
self.assertNotEqual(0, len(rx))
def send_and_expect_one_itf(self, input, pkts, itf):
input.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = itf.get_capture(len(pkts))
def test_ip6_load_balance(self):
""" IPv6 Load-Balancing """
#
# An array of packets that differ only in the destination port
# - IP only
# - MPLS EOS
# - MPLS non-EOS
# - MPLS non-EOS with an entropy label
#
port_ip_pkts = []
port_mpls_pkts = []
port_mpls_neos_pkts = []
port_ent_pkts = []
#
# An array of packets that differ only in the source address
#
src_ip_pkts = []
src_mpls_pkts = []
for ii in range(65):
port_ip_hdr = (IPv6(dst="3000::1", src="3000:1::1") /
UDP(sport=1234, dport=1234 + ii) /
Raw('\xa5' * 100))
port_ip_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
port_ip_hdr))
port_mpls_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=66, ttl=2) /
port_ip_hdr))
port_mpls_neos_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=67, ttl=2) /
MPLS(label=77, ttl=2) /
port_ip_hdr))
port_ent_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=67, ttl=2) /
MPLS(label=14, ttl=2) /
MPLS(label=999, ttl=2) /
port_ip_hdr))
src_ip_hdr = (IPv6(dst="3000::1", src="3000:1::%d" % ii) /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
src_ip_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
src_ip_hdr))
src_mpls_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
MPLS(label=66, ttl=2) /
src_ip_hdr))
#
# A route for the IP pacekts
#
route_3000_1 = VppIpRoute(self, "3000::1", 128,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
is_ip6=1),
VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index,
is_ip6=1)],
is_ip6=1)
route_3000_1.add_vpp_config()
#
# a local-label for the EOS packets
#
binding = VppMplsIpBind(self, 66, "3000::1", 128, is_ip6=1)
binding.add_vpp_config()
#
# An MPLS route for the non-EOS packets
#
route_67 = VppMplsRoute(self, 67, 0,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index,
labels=[67],
is_ip6=1),
VppRoutePath(self.pg2.remote_ip6,
self.pg2.sw_if_index,
labels=[67],
is_ip6=1)])
route_67.add_vpp_config()
#
# inject the packet on pg0 - expect load-balancing across the 2 paths
# - since the default hash config is to use IP src,dst and port
# src,dst
# We are not going to ensure equal amounts of packets across each link,
# since the hash algorithm is statistical and therefore this can never
# be guaranteed. But wuth 64 different packets we do expect some
# balancing. So instead just ensure there is traffic on each link.
#
self.send_and_expect_load_balancing(self.pg0, port_ip_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, src_ip_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, port_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, port_mpls_neos_pkts,
[self.pg1, self.pg2])
#
# The packets with Entropy label in should not load-balance,
# since the Entorpy value is fixed.
#
self.send_and_expect_one_itf(self.pg0, port_ent_pkts, self.pg1)
#
# change the flow hash config so it's only IP src,dst
# - now only the stream with differing source address will
# load-balance
#
self.vapi.set_ip_flow_hash(0, is_ip6=1, src=1, dst=1, sport=0, dport=0)
self.send_and_expect_load_balancing(self.pg0, src_ip_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_one_itf(self.pg0, port_ip_pkts, self.pg2)
#
# change the flow hash config back to defaults
#
self.vapi.set_ip_flow_hash(0, is_ip6=1, src=1, dst=1, sport=1, dport=1)
#
# Recursive prefixes
# - testing that 2 stages of load-balancing occurs and there is no
# polarisation (i.e. only 2 of 4 paths are used)
#
port_pkts = []
src_pkts = []
for ii in range(257):
port_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(dst="4000::1", src="4000:1::1") /
UDP(sport=1234, dport=1234 + ii) /
Raw('\xa5' * 100)))
src_pkts.append((Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(dst="4000::1", src="4000:1::%d" % ii) /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100)))
route_3000_2 = VppIpRoute(self, "3000::2", 128,
[VppRoutePath(self.pg3.remote_ip6,
self.pg3.sw_if_index,
is_ip6=1),
VppRoutePath(self.pg4.remote_ip6,
self.pg4.sw_if_index,
is_ip6=1)],
is_ip6=1)
route_3000_2.add_vpp_config()
route_4000_1 = VppIpRoute(self, "4000::1", 128,
[VppRoutePath("3000::1",
0xffffffff,
is_ip6=1),
VppRoutePath("3000::2",
0xffffffff,
is_ip6=1)],
is_ip6=1)
route_4000_1.add_vpp_config()
#
# inject the packet on pg0 - expect load-balancing across all 4 paths
#
self.vapi.cli("clear trace")
self.send_and_expect_load_balancing(self.pg0, port_pkts,
[self.pg1, self.pg2,
self.pg3, self.pg4])
self.send_and_expect_load_balancing(self.pg0, src_pkts,
[self.pg1, self.pg2,
self.pg3, self.pg4])
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)