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vpp/test/test_l2bd_multi_instance.py
Klement Sekera d9b0c6fbf7 tests: replace pycodestyle with black 
Drop pycodestyle for code style checking in favor of black. Black is
much faster, stable PEP8 compliant code style checker offering also
automatic formatting. It aims to be very stable and produce smallest
diffs. It's used by many small and big projects.

Running checkstyle with black takes a few seconds with a terse output.
Thus, test-checkstyle-diff is no longer necessary.

Expand scope of checkstyle to all python files in the repo, replacing
test-checkstyle with checkstyle-python.

Also, fixstyle-python is now available for automatic style formatting.

Note: python virtualenv has been consolidated in test/Makefile,
test/requirements*.txt which will eventually be moved to a central
location.  This is required to simply the automated generation of
docker executor images in the CI.

Type: improvement
Change-Id: I022a326603485f58585e879ac0f697fceefbc9c8
Signed-off-by: Klement Sekera <klement.sekera@gmail.com>
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
2022-05-10 18:52:08 +00:00

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#!/usr/bin/env python3
"""L2BD Multi-instance Test Case HLD:
**NOTES:**
- higher number of pg-l2 interfaces causes problems => only 15 pg-l2 \
interfaces in 5 bridge domains are tested
- jumbo packets in configuration with 14 l2-pg interfaces leads to \
problems too
**config 1**
- add 15 pg-l2 interfaces
- configure one host per pg-l2 interface
- configure 5 bridge domains (BD)
- add 3 pg-l2 interfaces per BD
**test 1**
- send L2 MAC frames between all pg-l2 interfaces of all BDs
**verify 1**
- check BD data by parsing output of bridge_domain_dump API command
- all packets received correctly
**config 2**
- update data of 5 BD
- disable learning, forwarding, flooding and uu_flooding for BD1
- disable forwarding for BD2
- disable flooding for BD3
- disable uu_flooding for BD4
- disable learning for BD5
**verify 2**
- check BD data by parsing output of bridge_domain_dump API command
**config 3**
- delete 2 BDs
**test 3**
- send L2 MAC frames between all pg-l2 interfaces of all BDs
- send L2 MAC frames between all pg-l2 interfaces formerly assigned to \
deleted BDs
**verify 3**
- check BD data by parsing output of bridge_domain_dump API command
- all packets received correctly on all 3 pg-l2 interfaces assigned to BDs
- no packet received on all 3 pg-l2 interfaces of all deleted BDs
**config 4**
- add 2 BDs
- add 3 pg-l2 interfaces per BD
**test 4**
- send L2 MAC frames between all pg-l2 interfaces of all BDs
**verify 4**
- check BD data by parsing output of bridge_domain_dump API command
- all packets received correctly
**config 5**
- delete 5 BDs
**verify 5**
- check BD data by parsing output of bridge_domain_dump API command
"""
import unittest
import random
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from framework import VppTestCase, VppTestRunner
from util import Host, ppp
class TestL2bdMultiInst(VppTestCase):
"""L2BD 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(TestL2bdMultiInst, cls).setUpClass()
try:
# Create pg interfaces
n_bd = 5
cls.ifs_per_bd = ifs_per_bd = 3
n_ifs = n_bd * ifs_per_bd
cls.create_pg_interfaces(range(n_ifs))
# Packet flows mapping pg0 -> pg1, pg2 etc.
cls.flows = dict()
for b in range(n_bd):
bd_ifs = cls.bd_if_range(b + 1)
for j in bd_ifs:
cls.flows[cls.pg_interfaces[j]] = [
cls.pg_interfaces[x] for x in bd_ifs if x != j
]
assert len(cls.flows[cls.pg_interfaces[j]]) == ifs_per_bd - 1
# Mapping between packet-generator index and lists of test hosts
cls.hosts_by_pg_idx = dict()
# Create test host entries
cls.create_hosts(5)
# Packet sizes - jumbo packet (9018 bytes) skipped
cls.pg_if_packet_sizes = [64, 512, 1518]
# Set up all interfaces
for i in cls.pg_interfaces:
i.admin_up()
except Exception:
super(TestL2bdMultiInst, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestL2bdMultiInst, cls).tearDownClass()
def setUp(self):
"""
Clear trace and packet infos before running each test.
"""
self.reset_packet_infos()
super(TestL2bdMultiInst, self).setUp()
# Create list of BDs
self.bd_list = []
# Create list of deleted BDs
self.bd_deleted_list = []
# Create list of pg_interfaces in BDs
self.pg_in_bd = []
def tearDown(self):
"""
Show various debug prints after each test.
"""
super(TestL2bdMultiInst, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.ppcli("show l2fib verbose"))
self.logger.info(self.vapi.ppcli("show bridge-domain"))
@classmethod
def create_hosts(cls, hosts_per_if):
"""
Create required number of host MAC addresses and distribute them
among interfaces. Create host IPv4 address for every host MAC
address.
:param int hosts_per_if: Number of hosts per if to create MAC/IPv4
addresses for.
"""
c = hosts_per_if
assert not cls.hosts_by_pg_idx
for i in range(len(cls.pg_interfaces)):
pg_idx = cls.pg_interfaces[i].sw_if_index
cls.hosts_by_pg_idx[pg_idx] = [
Host(
"00:00:00:ff:%02x:%02x" % (pg_idx, j + 1),
"172.17.1%02u.%u" % (pg_idx, j + 1),
)
for j in range(c)
]
@classmethod
def bd_if_range(cls, b):
n = cls.ifs_per_bd
start = (b - 1) * n
return range(start, start + n)
def create_bd_and_mac_learn(self, count, start=1):
"""
Create required number of bridge domains with MAC learning enabled,
put 3 l2-pg interfaces to every bridge domain and send MAC learning
packets.
:param int count: Number of bridge domains to be created.
:param int start: Starting number of the bridge domain ID.
(Default value = 1)
"""
for b in range(start, start + count):
self.vapi.bridge_domain_add_del(bd_id=b)
self.logger.info("Bridge domain ID %d created" % b)
if self.bd_list.count(b) == 0:
self.bd_list.append(b)
if self.bd_deleted_list.count(b) == 1:
self.bd_deleted_list.remove(b)
for j in self.bd_if_range(b):
pg_if = self.pg_interfaces[j]
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=pg_if.sw_if_index, bd_id=b
)
self.logger.info(
"pg-interface %s added to bridge domain ID %d" % (pg_if.name, b)
)
self.pg_in_bd.append(pg_if)
hosts = self.hosts_by_pg_idx[pg_if.sw_if_index]
packets = [
Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac) for host in hosts
]
pg_if.add_stream(packets)
self.logger.info("Sending broadcast eth frames for MAC learning")
self.pg_start()
self.logger.info(self.vapi.ppcli("show bridge-domain"))
self.logger.info(self.vapi.ppcli("show l2fib"))
def delete_bd(self, count, start=1):
"""
Delete required number of bridge domains.
:param int count: Number of bridge domains to be created.
:param int start: Starting number of the bridge domain ID.
(Default value = 1)
"""
for b in range(start, start + count):
for j in self.bd_if_range(b):
pg_if = self.pg_interfaces[j]
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=pg_if.sw_if_index, bd_id=b, enable=0
)
self.pg_in_bd.remove(pg_if)
self.vapi.bridge_domain_add_del(bd_id=b, is_add=0)
self.bd_list.remove(b)
self.bd_deleted_list.append(b)
self.logger.info("Bridge domain ID %d deleted" % b)
def create_stream(self, src_if):
"""
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.
"""
packet_sizes = self.pg_if_packet_sizes
pkts = []
src_hosts = self.hosts_by_pg_idx[src_if.sw_if_index]
for dst_if in self.flows[src_if]:
dst_hosts = self.hosts_by_pg_idx[dst_if.sw_if_index]
for dst_host in dst_hosts:
pkt_info = self.create_packet_info(src_if, dst_if)
payload = self.info_to_payload(pkt_info)
src_host = random.choice(src_hosts)
p = (
Ether(dst=dst_host.mac, src=src_host.mac)
/ IP(src=src_host.ip4, dst=dst_host.ip4)
/ 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, dst_if):
"""
Verify captured input packet stream for defined interface.
:param object dst_if: Interface to verify captured packet stream for.
"""
last_info = dict()
for i in self.flows[dst_if]:
last_info[i.sw_if_index] = None
dst = dst_if.sw_if_index
for packet in dst_if.get_capture():
try:
ip = packet[IP]
udp = packet[UDP]
info = self.payload_to_info(packet[Raw])
self.assertEqual(info.dst, dst)
self.logger.debug(
"Got packet on port %s: src=%u (id=%u)"
% (dst_if.name, info.src, info.index)
)
last_info[info.src] = self.get_next_packet_info_for_interface2(
info.src, dst, last_info[info.src]
)
pkt_info = last_info[info.src]
self.assertTrue(pkt_info is not None)
self.assertEqual(info.index, pkt_info.index)
# Check standard fields against saved data in pkt
saved = pkt_info.data
self.assertEqual(ip.src, saved[IP].src)
self.assertEqual(ip.dst, saved[IP].dst)
self.assertEqual(udp.sport, saved[UDP].sport)
self.assertEqual(udp.dport, saved[UDP].dport)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
s = ""
remaining = 0
for src in self.flows[dst_if]:
remaining_packet = self.get_next_packet_info_for_interface2(
src.sw_if_index, dst, last_info[src.sw_if_index]
)
if remaining_packet is None:
s += "Port %u: Packet expected from source %u didn't arrive\n" % (
dst,
src.sw_if_index,
)
remaining += 1
self.assertNotEqual(0, remaining, s)
def set_bd_flags(self, bd_id, **args):
"""
Enable/disable defined feature(s) of the bridge domain.
:param int bd_id: Bridge domain ID.
:param list args: List of feature/status pairs. Allowed features: \
learn, forward, flood, uu_flood and arp_term. Status False means \
disable, status True means enable the feature.
:raise: ValueError in case of unknown feature in the input.
"""
for flag in args:
if flag == "learn":
feature_bitmap = 1 << 0
elif flag == "forward":
feature_bitmap = 1 << 1
elif flag == "flood":
feature_bitmap = 1 << 2
elif flag == "uu_flood":
feature_bitmap = 1 << 3
elif flag == "arp_term":
feature_bitmap = 1 << 4
else:
raise ValueError("Unknown feature used: %s" % flag)
is_set = 1 if args[flag] else 0
self.vapi.bridge_flags(bd_id=bd_id, is_set=is_set, flags=feature_bitmap)
self.logger.info("Bridge domain ID %d updated" % bd_id)
def verify_bd(self, bd_id, **args):
"""
Check if the bridge domain is configured and verify expected status
of listed features.
:param int bd_id: Bridge domain ID.
:param list args: List of feature/status pairs. Allowed features: \
learn, forward, flood, uu_flood and arp_term. Status False means \
disable, status True means enable the feature.
:return: 1 if bridge domain is configured, otherwise return 0.
:raise: ValueError in case of unknown feature in the input.
"""
bd_dump = self.vapi.bridge_domain_dump(bd_id)
if len(bd_dump) == 0:
self.logger.info("Bridge domain ID %d is not configured" % bd_id)
return 0
else:
bd_dump = bd_dump[0]
if len(args) > 0:
for flag in args:
expected_status = 1 if args[flag] else 0
if flag == "learn":
flag_status = bd_dump[6]
elif flag == "forward":
flag_status = bd_dump[5]
elif flag == "flood":
flag_status = bd_dump[3]
elif flag == "uu_flood":
flag_status = bd_dump[4]
elif flag == "arp_term":
flag_status = bd_dump[7]
else:
raise ValueError("Unknown feature used: %s" % flag)
self.assertEqual(expected_status, flag_status)
return 1
def run_verify_test(self):
"""
Create packet streams for all configured l2-pg interfaces, send all \
prepared packet streams and verify that:
- all packets received correctly on all pg-l2 interfaces assigned
to bridge domains
- no packet received on all pg-l2 interfaces not assigned to
bridge domains
:raise RuntimeError: if no packet captured on l2-pg interface assigned
to the bridge domain or if any packet is captured
on l2-pg interface not assigned to the bridge
domain.
"""
# Test
# Create incoming packet streams for packet-generator interfaces
# for pg_if in self.pg_interfaces:
assert len(self._packet_count_for_dst_if_idx) == 0
for pg_if in self.pg_in_bd:
pkts = self.create_stream(pg_if)
pg_if.add_stream(pkts)
# Enable packet capture and start packet sending
self.pg_enable_capture(self.pg_in_bd)
self.pg_start()
# Verify
# Verify outgoing packet streams per packet-generator interface
for pg_if in self.pg_in_bd:
self.verify_capture(pg_if)
def test_l2bd_inst_01(self):
"""L2BD Multi-instance test 1 - create 5 BDs"""
# Config 1
# Create 5 BDs, put interfaces to these BDs and send MAC learning
# packets
self.create_bd_and_mac_learn(5)
# Verify 1
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
# Test 1
# self.vapi.cli("clear trace")
self.run_verify_test()
self.delete_bd(5)
def test_l2bd_inst_02(self):
"""L2BD Multi-instance test 2 - update data of 5 BDs"""
# Config 2
# Update data of 5 BDs (disable learn, forward, flood, uu-flood)
self.create_bd_and_mac_learn(5)
self.set_bd_flags(
self.bd_list[0], learn=False, forward=False, flood=False, uu_flood=False
)
self.set_bd_flags(self.bd_list[1], forward=False)
self.set_bd_flags(self.bd_list[2], flood=False)
self.set_bd_flags(self.bd_list[3], uu_flood=False)
self.set_bd_flags(self.bd_list[4], learn=False)
# Verify 2
# Skipping check of uu_flood as it is not returned by
# bridge_domain_dump api command
self.verify_bd(
self.bd_list[0], learn=False, forward=False, flood=False, uu_flood=False
)
self.verify_bd(
self.bd_list[1], learn=True, forward=False, flood=True, uu_flood=True
)
self.verify_bd(
self.bd_list[2], learn=True, forward=True, flood=False, uu_flood=True
)
self.verify_bd(
self.bd_list[3], learn=True, forward=True, flood=True, uu_flood=False
)
self.verify_bd(
self.bd_list[4], learn=False, forward=True, flood=True, uu_flood=True
)
self.delete_bd(5)
def test_l2bd_inst_03(self):
"""L2BD Multi-instance test 3 - delete 2 BDs"""
# Config 3
# Delete 2 BDs
self.create_bd_and_mac_learn(5)
self.delete_bd(2)
# Verify 3
for bd_id in self.bd_deleted_list:
self.assertEqual(self.verify_bd(bd_id), 0)
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
# Test 3
self.run_verify_test()
self.delete_bd(3, 3)
def test_l2bd_inst_04(self):
"""L2BD Multi-instance test 4 - add 2 BDs"""
# Config 4
# Create 5 BDs, put interfaces to these BDs and send MAC learning
# packets
self.create_bd_and_mac_learn(2)
# Verify 4
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
# Test 4
# self.vapi.cli("clear trace")
self.run_verify_test()
self.delete_bd(2)
def test_l2bd_inst_05(self):
"""L2BD Multi-instance test 5 - delete 5 BDs"""
# Config 5
# Delete 5 BDs
self.create_bd_and_mac_learn(5)
self.delete_bd(5)
# Verify 5
for bd_id in self.bd_deleted_list:
self.assertEqual(self.verify_bd(bd_id), 0)
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
if __name__ == "__main__":
unittest.main(testRunner=VppTestRunner)
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