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#!/usr/bin/env python
"""L2 FIB Test Case HLD:
**config 1**
- add 4 pg-l2 interfaces
- configure them into l2bd
- configure 100 MAC entries in L2 fib - 25 MACs per interface
- L2 MAC learning and unknown unicast flooding disabled in l2bd
- configure 100 MAC entries in L2 fib - 25 MACs per interface
**test 1**
- send L2 MAC frames between all 4 pg-l2 interfaces for all of 100 MAC \
entries in the FIB
**verify 1**
- all packets received correctly
**config 2**
- delete 12 MAC entries - 3 MACs per interface
**test 2a**
- send L2 MAC frames between all 4 pg-l2 interfaces for non-deleted MAC \
entries
**verify 2a**
- all packets received correctly
**test 2b**
- send L2 MAC frames between all 4 pg-l2 interfaces for all of 12 deleted \
MAC entries
**verify 2b**
- no packet received on all 4 pg-l2 interfaces
**config 3**
- configure new 100 MAC entries in L2 fib - 25 MACs per interface
**test 3**
- send L2 MAC frames between all 4 pg-l2 interfaces for all of 188 MAC \
entries in the FIB
**verify 3**
- all packets received correctly
**config 4**
- delete 160 MAC entries, 40 MACs per interface
**test 4a**
- send L2 MAC frames between all 4 pg-l2 interfaces for all of 28 \
non-deleted MAC entries
**verify 4a**
- all packets received correctly
**test 4b**
- try send L2 MAC frames between all 4 pg-l2 interfaces for all of 172 \
deleted MAC entries
**verify 4b**
- no packet received on all 4 pg-l2 interfaces
"""
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 TestL2fib(VppTestCase):
""" L2 FIB 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.
:var int bd_id: Bridge domain ID.
:var int mac_entries_count: Number of MAC entries for bridge-domain.
"""
super(TestL2fib, cls).setUpClass()
# Test variables
cls.bd_id = 1
cls.mac_entries_count = 200
try:
# Create 4 pg interfaces
cls.create_pg_interfaces(range(4))
# Packet flows mapping pg0 -> pg1, pg2, pg3 etc.
cls.flows = dict()
cls.flows[cls.pg0] = [cls.pg1, cls.pg2, cls.pg3]
cls.flows[cls.pg1] = [cls.pg0, cls.pg2, cls.pg3]
cls.flows[cls.pg2] = [cls.pg0, cls.pg1, cls.pg3]
cls.flows[cls.pg3] = [cls.pg0, cls.pg1, cls.pg2]
# Packet sizes
cls.pg_if_packet_sizes = [64, 512, 1518, 9018]
# Create BD with MAC learning and unknown unicast flooding disabled
# and put interfaces to this BD
cls.vapi.bridge_domain_add_del(
bd_id=cls.bd_id, uu_flood=0, learn=0)
for pg_if in cls.pg_interfaces:
cls.vapi.sw_interface_set_l2_bridge(pg_if.sw_if_index,
bd_id=cls.bd_id)
# Set up all interfaces
for i in cls.pg_interfaces:
i.admin_up()
# Mapping between packet-generator index and lists of test hosts
cls.hosts_by_pg_idx = dict()
for pg_if in cls.pg_interfaces:
cls.hosts_by_pg_idx[pg_if.sw_if_index] = []
# Create list of deleted hosts
cls.deleted_hosts_by_pg_idx = dict()
for pg_if in cls.pg_interfaces:
cls.deleted_hosts_by_pg_idx[pg_if.sw_if_index] = []
except Exception:
super(TestL2fib, cls).tearDownClass()
raise
def setUp(self):
super(TestL2fib, self).setUp()
self.reset_packet_infos()
def tearDown(self):
"""
Show various debug prints after each test.
"""
super(TestL2fib, 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 %s detail"
% self.bd_id))
def create_hosts(self, count, start=0):
"""
Create required number of host MAC addresses and distribute them among
interfaces. Create host IPv4 address for every host MAC address.
:param int count: Number of hosts to create MAC/IPv4 addresses for.
:param int start: Number to start numbering from.
"""
n_int = len(self.pg_interfaces)
macs_per_if = count / n_int
i = -1
for pg_if in self.pg_interfaces:
i += 1
start_nr = macs_per_if * i + start
end_nr = count + start if i == (n_int - 1) \
else macs_per_if * (i + 1) + start
hosts = self.hosts_by_pg_idx[pg_if.sw_if_index]
for j in range(start_nr, end_nr):
host = Host(
"00:00:00:ff:%02x:%02x" % (pg_if.sw_if_index, j),
"172.17.1%02x.%u" % (pg_if.sw_if_index, j))
hosts.append(host)
def config_l2_fib_entries(self, count, start=0):
"""
Create required number of L2 FIB entries.
:param int count: Number of L2 FIB entries to be created.
:param int start: Starting index of the host list. (Default value = 0)
"""
n_int = len(self.pg_interfaces)
percent = 0
counter = 0.0
for pg_if in self.pg_interfaces:
end_nr = start + count / n_int
for j in range(start, end_nr):
host = self.hosts_by_pg_idx[pg_if.sw_if_index][j]
self.vapi.l2fib_add_del(
host.mac, self.bd_id, pg_if.sw_if_index, static_mac=1)
counter += 1
percentage = counter / count * 100
if percentage > percent:
self.logger.info("Configure %d L2 FIB entries .. %d%% done"
% (count, percentage))
percent += 1
self.logger.info(self.vapi.ppcli("show l2fib"))
def delete_l2_fib_entry(self, count):
"""
Delete required number of L2 FIB entries.
:param int count: Number of L2 FIB entries to be created.
"""
n_int = len(self.pg_interfaces)
percent = 0
counter = 0.0
for pg_if in self.pg_interfaces:
for j in range(count / n_int):
host = self.hosts_by_pg_idx[pg_if.sw_if_index][0]
self.vapi.l2fib_add_del(
host.mac, self.bd_id, pg_if.sw_if_index, is_add=0)
self.deleted_hosts_by_pg_idx[pg_if.sw_if_index].append(host)
del self.hosts_by_pg_idx[pg_if.sw_if_index][0]
counter += 1
percentage = counter / count * 100
if percentage > percent:
self.logger.info("Delete %d L2 FIB entries .. %d%% done"
% (count, percentage))
percent += 1
self.logger.info(self.vapi.ppcli("show l2fib"))
def create_stream(self, src_if, packet_sizes, deleted=False):
"""
Create input packet stream for defined interface using hosts or
deleted_hosts list.
:param object src_if: Interface to create packet stream for.
:param list packet_sizes: List of required packet sizes.
:param boolean deleted: Set to True if deleted_hosts list required.
:return: Stream of packets.
"""
pkts = []
src_hosts = self.hosts_by_pg_idx[src_if.sw_if_index]
for dst_if in self.flows[src_if]:
dst_hosts = self.deleted_hosts_by_pg_idx[dst_if.sw_if_index]\
if deleted else self.hosts_by_pg_idx[dst_if.sw_if_index]
n_int = len(dst_hosts)
for i in range(0, n_int):
dst_host = dst_hosts[i]
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=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)
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:
payload_info = self.payload_to_info(str(packet[Raw]))
try:
ip = packet[IP]
udp = packet[UDP]
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.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[IP].src)
self.assertEqual(ip.dst, saved_packet[IP].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.assertTrue(
remaining_packet is None,
"Port %u: Packet expected from source %u didn't arrive" %
(dst_sw_if_index, i.sw_if_index))
def run_verify_test(self):
# Test
# Create incoming packet streams for packet-generator interfaces
for i in self.pg_interfaces:
pkts = self.create_stream(i, self.pg_if_packet_sizes)
i.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 i in self.pg_interfaces:
capture = i.get_capture()
self.logger.info("Verifying capture on interface %s" % i.name)
self.verify_capture(i, capture)
def run_verify_negat_test(self):
# Test
# Create incoming packet streams for packet-generator interfaces for
# deleted MAC addresses
self.reset_packet_infos()
for i in self.pg_interfaces:
pkts = self.create_stream(i, self.pg_if_packet_sizes, deleted=True)
i.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 i in self.pg_interfaces:
i.assert_nothing_captured(remark="outgoing interface")
def test_l2_fib_01(self):
""" L2 FIB test 1 - program 100 MAC addresses
"""
# Config 1
# Create test host entries
self.create_hosts(100)
# Add first 100 MAC entries to L2 FIB
self.config_l2_fib_entries(100)
# Test 1
self.run_verify_test()
def test_l2_fib_02(self):
""" L2 FIB test 2 - delete 12 MAC entries
"""
# Config 2
# Delete 12 MAC entries (3 per interface) from L2 FIB
self.delete_l2_fib_entry(12)
# Test 2a
self.run_verify_test()
# Verify 2a
self.run_verify_negat_test()
def test_l2_fib_03(self):
""" L2 FIB test 3 - program new 100 MAC addresses
"""
# Config 3
# Create new test host entries
self.create_hosts(100, start=100)
# Add new 100 MAC entries to L2 FIB
self.config_l2_fib_entries(100, start=22)
# Test 3
self.run_verify_test()
def test_l2_fib_04(self):
""" L2 FIB test 4 - delete 160 MAC entries
"""
# Config 4
# Delete 160 MAC entries (40 per interface) from L2 FIB
self.delete_l2_fib_entry(160)
# Test 4a
self.run_verify_negat_test()
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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