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#!/usr/bin/env python3
"""IP6 VRF Multi-instance Test Case HLD:
**NOTES:**
- higher number of pg-ip6 interfaces causes problems => only 15 pg-ip6 \
interfaces in 5 VRFs are tested
- jumbo packets in configuration with 15 pg-ip6 interfaces leads to \
problems too
**config 1**
- add 15 pg-ip6 interfaces
- configure 5 hosts per pg-ip6 interface
- configure 4 VRFs
- add 3 pg-ip6 interfaces per VRF
**test 1**
- send IP6 packets between all pg-ip6 interfaces in all VRF groups
**verify 1**
- check VRF data by parsing output of ip_route_dump API command
- all packets received correctly in case of pg-ip6 interfaces in the
same VRF
- no packet received in case of pg-ip6 interfaces not in VRF
- no packet received in case of pg-ip6 interfaces in different VRFs
**config 2**
- reset 2 VRFs
**test 2**
- send IP6 packets between all pg-ip6 interfaces in all VRF groups
**verify 2**
- check VRF data by parsing output of ip_route_dump API command
- all packets received correctly in case of pg-ip6 interfaces in the
same VRF
- no packet received in case of pg-ip6 interfaces not in VRF
- no packet received in case of pg-ip6 interfaces in different VRFs
**config 3**
- add 1 of reset VRFs and 1 new VRF
**test 3**
- send IP6 packets between all pg-ip6 interfaces in all VRF groups
**verify 3**
- check VRF data by parsing output of ip_route_dump API command
- all packets received correctly in case of pg-ip6 interfaces in the
same VRF
- no packet received in case of pg-ip6 interfaces not in VRF
- no packet received in case of pg-ip6 interfaces in different VRFs
**config 4**
- reset all VRFs (i.e. no VRF except VRF=0 created)
**test 4**
- send IP6 packets between all pg-ip6 interfaces in all VRF groups
**verify 4**
- check VRF data by parsing output of ip_route_dump API command
- all packets received correctly in case of pg-ip6 interfaces in the
same VRF
- no packet received in case of pg-ip6 interfaces not in VRF
- no packet received in case of pg-ip6 interfaces in different VRFs
"""
import unittest
import random
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet6 import (
UDP,
IPv6,
ICMPv6ND_NS,
ICMPv6ND_RA,
RouterAlert,
IPv6ExtHdrHopByHop,
)
from scapy.utils6 import in6_ismaddr, in6_isllsnmaddr
from framework import VppTestCase
from asfframework import VppTestRunner
from util import ppp
from vrf import VRFState
def is_ipv6_misc_ext(p):
"""Is packet one of uninteresting IPv6 broadcasts (extended to filter out
ICMPv6 Neighbor Discovery - Neighbor Advertisement packets too)?"""
if p.haslayer(ICMPv6ND_RA):
if in6_ismaddr(p[IPv6].dst):
return True
if p.haslayer(ICMPv6ND_NS):
if in6_isllsnmaddr(p[IPv6].dst):
return True
if p.haslayer(IPv6ExtHdrHopByHop):
for o in p[IPv6ExtHdrHopByHop].options:
if isinstance(o, RouterAlert):
return True
return False
class TestIP6VrfMultiInst(VppTestCase):
"""IP6 VRF Multi-instance Test Case"""
@classmethod
def setUpClass(cls):
"""
Perform standard class setup (defined by class method setUpClass in
class VppTestCase) before running the test case, set test case related
variables and configure VPP.
"""
super(TestIP6VrfMultiInst, cls).setUpClass()
# Test variables
cls.hosts_per_pg = 5
cls.nr_of_vrfs = 5
cls.pg_ifs_per_vrf = 3
try:
# Create pg interfaces
cls.create_pg_interfaces(range(cls.nr_of_vrfs * cls.pg_ifs_per_vrf))
# Packet flows mapping pg0 -> pg1, pg2 etc.
cls.flows = dict()
for i in range(len(cls.pg_interfaces)):
multiplicand = i // cls.pg_ifs_per_vrf
pg_list = [
cls.pg_interfaces[multiplicand * cls.pg_ifs_per_vrf + j]
for j in range(cls.pg_ifs_per_vrf)
if (multiplicand * cls.pg_ifs_per_vrf + j) != i
]
cls.flows[cls.pg_interfaces[i]] = pg_list
# Packet sizes - jumbo packet (9018 bytes) skipped
cls.pg_if_packet_sizes = [64, 512, 1518]
# Set up all interfaces
for pg_if in cls.pg_interfaces:
pg_if.admin_up()
pg_if.generate_remote_hosts(cls.hosts_per_pg)
# Create list of VRFs
cls.vrf_list = list()
# Create list of reset VRFs
cls.vrf_reset_list = list()
# Create list of pg_interfaces in VRFs
cls.pg_in_vrf = list()
# Create list of pg_interfaces not in VRFs
cls.pg_not_in_vrf = [pg_if for pg_if in cls.pg_interfaces]
# Create mapping of pg_interfaces to VRF IDs
cls.pg_if_sets = dict()
for i in range(cls.nr_of_vrfs):
set_id = i + 1
pg_list = [
cls.pg_interfaces[i * cls.pg_ifs_per_vrf + j]
for j in range(cls.pg_ifs_per_vrf)
]
cls.pg_if_sets[set_id] = pg_list
except Exception:
super(TestIP6VrfMultiInst, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestIP6VrfMultiInst, cls).tearDownClass()
def setUp(self):
"""
Clear trace and packet infos before running each test.
"""
super(TestIP6VrfMultiInst, self).setUp()
self.reset_packet_infos()
def tearDown(self):
"""
Show various debug prints after each test.
"""
super(TestIP6VrfMultiInst, self).tearDown()
def show_commands_at_teardown(self):
self.logger.info(self.vapi.ppcli("show ip6 fib"))
self.logger.info(self.vapi.ppcli("show ip6 neighbors"))
def _assign_interfaces(self, vrf_id, if_set_id):
for i in range(self.pg_ifs_per_vrf):
pg_if = self.pg_if_sets[if_set_id][i]
pg_if.set_table_ip6(vrf_id)
self.logger.info(
"pg-interface %s added to IPv6 VRF ID %d" % (pg_if.name, vrf_id)
)
if pg_if not in self.pg_in_vrf:
self.pg_in_vrf.append(pg_if)
if pg_if in self.pg_not_in_vrf:
self.pg_not_in_vrf.remove(pg_if)
pg_if.config_ip6()
pg_if.disable_ipv6_ra()
pg_if.configure_ipv6_neighbors()
def create_vrf_and_assign_interfaces(self, count, start=1):
"""
Create required number of FIB tables / VRFs, put 3 pg-ip6 interfaces
to every FIB table / VRF.
:param int count: Number of FIB tables / VRFs to be created.
:param int start: Starting number of the FIB table / VRF ID. \
(Default value = 1)
"""
for i in range(count):
vrf_id = i + start
self.vapi.ip_table_add_del_v2(
is_add=1, table={"table_id": vrf_id, "is_ip6": 1}
)
self.logger.info("IPv6 VRF ID %d created" % vrf_id)
if vrf_id not in self.vrf_list:
self.vrf_list.append(vrf_id)
if vrf_id in self.vrf_reset_list:
self.vrf_reset_list.remove(vrf_id)
self._assign_interfaces(vrf_id, vrf_id)
self.logger.debug(self.vapi.ppcli("show ip6 fib"))
self.logger.debug(self.vapi.ppcli("show ip6 neighbors"))
def create_vrf_by_id_and_assign_interfaces(self, set_id, vrf_id=0xFFFFFFFF):
"""
Create a FIB table / VRF by vrf_id, put 3 pg-ip6 interfaces
to FIB table / VRF.
:param int vrf_id: Required table ID / VRF ID. \
(Default value = 0xffffffff, ID will be selected automatically)
"""
ret = self.vapi.ip_table_allocate(table={"table_id": vrf_id, "is_ip6": 1})
vrf_id = ret.table.table_id
self.logger.info("IPv6 VRF ID %d created" % vrf_id)
if vrf_id not in self.vrf_list:
self.vrf_list.append(vrf_id)
if vrf_id in self.vrf_reset_list:
self.vrf_reset_list.remove(vrf_id)
self._assign_interfaces(vrf_id, set_id)
self.logger.debug(self.vapi.ppcli("show ip6 fib"))
self.logger.debug(self.vapi.ppcli("show ip6 neighbors"))
return vrf_id
def reset_vrf_and_remove_from_vrf_list(self, vrf_id, if_set_id=None):
"""
Reset required FIB table / VRF and remove it from VRF list.
:param int vrf_id: The FIB table / VRF ID to be reset.
"""
if if_set_id is None:
if_set_id = vrf_id
self.vapi.ip_table_flush(table={"table_id": vrf_id, "is_ip6": 1})
if vrf_id in self.vrf_list:
self.vrf_list.remove(vrf_id)
if vrf_id not in self.vrf_reset_list:
self.vrf_reset_list.append(vrf_id)
for j in range(self.pg_ifs_per_vrf):
pg_if = self.pg_if_sets[if_set_id][j]
pg_if.unconfig_ip6()
pg_if.set_table_ip6(0)
if pg_if in self.pg_in_vrf:
self.pg_in_vrf.remove(pg_if)
if pg_if not in self.pg_not_in_vrf:
self.pg_not_in_vrf.append(pg_if)
self.logger.info("IPv6 VRF ID %d reset finished" % vrf_id)
self.logger.debug(self.vapi.ppcli("show ip6 fib"))
self.logger.debug(self.vapi.ppcli("show ip6 neighbors"))
def delete_vrf(self, vrf_id):
if vrf_id in self.vrf_list:
self.vrf_list.remove(vrf_id)
if vrf_id in self.vrf_reset_list:
self.vrf_reset_list.remove(vrf_id)
self.vapi.ip_table_add_del_v2(is_add=0, table={"table_id": vrf_id, "is_ip6": 1})
def create_stream(self, src_if, packet_sizes):
"""
Create input packet stream for defined interface using hosts list.
:param object src_if: Interface to create packet stream for.
:param list packet_sizes: List of required packet sizes.
:return: Stream of packets.
"""
pkts = []
src_hosts = src_if.remote_hosts
for dst_if in self.flows[src_if]:
for dst_host in dst_if.remote_hosts:
src_host = random.choice(src_hosts)
pkt_info = self.create_packet_info(src_if, dst_if)
payload = self.info_to_payload(pkt_info)
p = (
Ether(dst=src_if.local_mac, src=src_host.mac)
/ IPv6(src=src_host.ip6, dst=dst_host.ip6)
/ UDP(sport=1234, dport=1234)
/ Raw(payload)
)
pkt_info.data = p.copy()
size = random.choice(packet_sizes)
self.extend_packet(p, size)
pkts.append(p)
self.logger.debug(
"Input stream created for port %s. Length: %u pkt(s)"
% (src_if.name, len(pkts))
)
return pkts
def create_stream_crosswise_vrf(self, src_if, vrf_id, packet_sizes):
"""
Create input packet stream for negative test for leaking across
different VRFs for defined interface using hosts list.
:param object src_if: Interface to create packet stream for.
:param int vrf_id: The FIB table / VRF ID where src_if is assigned.
:param list packet_sizes: List of required packet sizes.
:return: Stream of packets.
"""
pkts = []
src_hosts = src_if.remote_hosts
vrf_lst = list(self.vrf_list)
vrf_lst.remove(vrf_id)
for vrf in vrf_lst:
for dst_if in self.pg_if_sets[vrf]:
for dst_host in dst_if.remote_hosts:
src_host = random.choice(src_hosts)
pkt_info = self.create_packet_info(src_if, dst_if)
payload = self.info_to_payload(pkt_info)
p = (
Ether(dst=src_if.local_mac, src=src_host.mac)
/ IPv6(src=src_host.ip6, dst=dst_host.ip6)
/ UDP(sport=1234, dport=1234)
/ Raw(payload)
)
pkt_info.data = p.copy()
size = random.choice(packet_sizes)
self.extend_packet(p, size)
pkts.append(p)
self.logger.debug(
"Input stream created for port %s. Length: %u pkt(s)"
% (src_if.name, len(pkts))
)
return pkts
def verify_capture(self, pg_if, capture):
"""
Verify captured input packet stream for defined interface.
:param object pg_if: Interface to verify captured packet stream for.
:param list capture: Captured packet stream.
"""
last_info = dict()
for i in self.pg_interfaces:
last_info[i.sw_if_index] = None
dst_sw_if_index = pg_if.sw_if_index
for packet in capture:
try:
ip = packet[IPv6]
udp = packet[UDP]
payload_info = self.payload_to_info(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)"
% (pg_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.assertIsNotNone(next_info)
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.pg_interfaces:
remaining_packet = self.get_next_packet_info_for_interface2(
i, dst_sw_if_index, last_info[i.sw_if_index]
)
self.assertIsNone(
remaining_packet,
"Port %u: Packet expected from source %u didn't arrive"
% (dst_sw_if_index, i.sw_if_index),
)
def verify_vrf(self, vrf_id, if_set_id=None):
"""
Check if the FIB table / VRF ID is configured.
:param int vrf_id: The FIB table / VRF ID to be verified.
:return: 1 if the FIB table / VRF ID is configured, otherwise return 0.
"""
if if_set_id is None:
if_set_id = vrf_id
ip6_fib_dump = self.vapi.ip_route_dump(vrf_id, True)
vrf_exist = len(ip6_fib_dump)
vrf_count = 0
for ip6_fib_details in ip6_fib_dump:
addr = ip6_fib_details.route.prefix.network_address
found = False
for pg_if in self.pg_if_sets[if_set_id]:
if found:
break
for host in pg_if.remote_hosts:
if str(addr) == host.ip6:
vrf_count += 1
found = True
break
if not vrf_exist and vrf_count == 0:
self.logger.info("IPv6 VRF ID %d is not configured" % vrf_id)
return VRFState.not_configured
elif vrf_exist and vrf_count == 0:
self.logger.info("IPv6 VRF ID %d has been reset" % vrf_id)
return VRFState.reset
else:
self.logger.info("IPv6 VRF ID %d is configured" % vrf_id)
return VRFState.configured
def run_verify_test(self):
"""
Create packet streams for all configured pg interfaces, send all \
prepared packet streams and verify that:
- all packets received correctly on all pg-ip6 interfaces assigned
to VRFs
- no packet received on all pg-ip6 interfaces not assigned to VRFs
:raise RuntimeError: If no packet captured on pg-ip6 interface assigned
to VRF or if any packet is captured on pg-ip6 interface not
assigned to VRF.
"""
# Test
# Create incoming packet streams for packet-generator interfaces
for pg_if in self.pg_interfaces:
pkts = self.create_stream(pg_if, self.pg_if_packet_sizes)
pg_if.add_stream(pkts)
# Enable packet capture and start packet sending
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# Verify
# Verify outgoing packet streams per packet-generator interface
for pg_if in self.pg_interfaces:
if pg_if in self.pg_in_vrf:
capture = pg_if.get_capture(remark="interface is in VRF")
self.verify_capture(pg_if, capture)
elif pg_if in self.pg_not_in_vrf:
pg_if.assert_nothing_captured(
remark="interface is not in VRF", filter_out_fn=is_ipv6_misc_ext
)
self.logger.debug("No capture for interface %s" % pg_if.name)
else:
raise Exception("Unknown interface: %s" % pg_if.name)
def run_crosswise_vrf_test(self):
"""
Create packet streams for every pg-ip6 interface in VRF towards all
pg-ip6 interfaces in other VRFs, send all prepared packet streams and
verify that:
- no packet received on all configured pg-ip6 interfaces
:raise RuntimeError: If any packet is captured on any pg-ip6 interface.
"""
# Test
# Create incoming packet streams for packet-generator interfaces
for vrf_id in self.vrf_list:
for pg_if in self.pg_if_sets[vrf_id]:
pkts = self.create_stream_crosswise_vrf(
pg_if, vrf_id, self.pg_if_packet_sizes
)
pg_if.add_stream(pkts)
# Enable packet capture and start packet sending
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# Verify
# Verify outgoing packet streams per packet-generator interface
for pg_if in self.pg_interfaces:
pg_if.assert_nothing_captured(
remark="interface is in other VRF", filter_out_fn=is_ipv6_misc_ext
)
self.logger.debug("No capture for interface %s" % pg_if.name)
def test_ip6_vrf_01(self):
"""IP6 VRF Multi-instance test 1 - create 4 VRFs"""
# Config 1
# Create 4 VRFs
self.create_vrf_and_assign_interfaces(4)
# Verify 1
for vrf_id in self.vrf_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.configured, VRFState)
# Test 1
self.run_verify_test()
self.run_crosswise_vrf_test()
def test_ip6_vrf_02(self):
"""IP6 VRF Multi-instance test 2 - reset 2 VRFs"""
# Config 2
# Delete 2 VRFs
self.reset_vrf_and_remove_from_vrf_list(1)
self.reset_vrf_and_remove_from_vrf_list(2)
# Verify 2
for vrf_id in self.vrf_reset_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.reset, VRFState)
for vrf_id in self.vrf_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.configured, VRFState)
# Test 2
self.run_verify_test()
self.run_crosswise_vrf_test()
# Reset routes learned from ICMPv6 Neighbor Discovery
# for vrf_id in self.vrf_reset_list:
# self.reset_vrf_and_remove_from_vrf_list(vrf_id)
def test_ip6_vrf_03(self):
"""IP6 VRF Multi-instance 3 - add 2 VRFs"""
# Config 3
# Add 1 of reset VRFs and 1 new VRF
self.create_vrf_and_assign_interfaces(1)
self.create_vrf_and_assign_interfaces(1, start=5)
# Verify 3
for vrf_id in self.vrf_reset_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.reset, VRFState)
for vrf_id in self.vrf_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.configured, VRFState)
# Test 3
self.run_verify_test()
self.run_crosswise_vrf_test()
# Reset routes learned from ICMPv6 Neighbor Discovery
# for vrf_id in self.vrf_reset_list:
# self.reset_vrf_and_remove_from_vrf_list(vrf_id)
def test_ip6_vrf_04(self):
"""IP6 VRF Multi-instance test 4 - reset 4 VRFs"""
# Config 4
# Reset all VRFs (i.e. no VRF except VRF=0 configured)
for i in range(len(self.vrf_list)):
# This call removes the first item of vrf_list as a side effect
self.reset_vrf_and_remove_from_vrf_list(self.vrf_list[0])
# Verify 4
for vrf_id in self.vrf_reset_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.reset, VRFState)
vrf_list_length = len(self.vrf_list)
self.assertEqual(
vrf_list_length,
0,
"List of configured VRFs is not empty: %s != 0" % vrf_list_length,
)
# Test 4
self.run_verify_test()
self.run_crosswise_vrf_test()
def test_ip6_vrf_05(self):
"""IP6 VRF Multi-instance test 5 - auto allocate vrf id"""
# Config 5
# Create several VRFs
# Set vrf_id manually first
self.create_vrf_by_id_and_assign_interfaces(1, 10)
# Set vrf_id automatically a few times
auto_vrf_id = [
self.create_vrf_by_id_and_assign_interfaces(i) for i in range(2, 5)
]
# Verify 5
self.assert_equal(self.verify_vrf(10, 1), VRFState.configured, VRFState)
for i, vrf in enumerate(auto_vrf_id):
self.assert_equal(
self.verify_vrf(vrf, i + 2), VRFState.configured, VRFState
)
# Test 5
self.run_verify_test()
# Config 5.1
# Reset VRFs
self.reset_vrf_and_remove_from_vrf_list(10, 1)
for i, vrf in enumerate(auto_vrf_id):
self.reset_vrf_and_remove_from_vrf_list(vrf, i + 2)
# Verify 5.1
self.assert_equal(self.verify_vrf(10, 1), VRFState.reset, VRFState)
for i, vrf in enumerate(auto_vrf_id):
self.assert_equal(self.verify_vrf(vrf, i + 2), VRFState.reset, VRFState)
vrf_list_length = len(self.vrf_list)
self.assertEqual(
vrf_list_length,
0,
"List of configured VRFs is not empty: %s != 0" % vrf_list_length,
)
# Cleanup our extra created VRFs
for vrf in auto_vrf_id:
self.delete_vrf(vrf)
self.delete_vrf(5)
self.delete_vrf(10)
def test_ip6_vrf_06(self):
"""IP6 VRF Multi-instance test 6 - recreate 4 VRFs"""
# Reconfigure all the VRFs
self.create_vrf_and_assign_interfaces(4)
# Verify
for vrf_id in self.vrf_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.configured, VRFState)
# Test
self.run_verify_test()
self.run_crosswise_vrf_test()
# Cleanup
for i in range(len(self.vrf_list)):
self.reset_vrf_and_remove_from_vrf_list(self.vrf_list[0])
# Verify
for vrf_id in self.vrf_reset_list:
self.assert_equal(self.verify_vrf(vrf_id), VRFState.reset, VRFState)
vrf_list_length = len(self.vrf_list)
self.assertEqual(
vrf_list_length,
0,
"List of configured VRFs is not empty: %s != 0" % vrf_list_length,
)
# Test
self.run_verify_test()
self.run_crosswise_vrf_test()
if __name__ == "__main__":
unittest.main(testRunner=VppTestRunner)
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