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#!/usr/bin/env python
"""IRB Test Case HLD:
**config**
- L2 MAC learning enabled in l2bd
- 2 routed interfaces untagged, bvi (Bridge Virtual Interface)
- 2 bridged interfaces in l2bd with bvi
**test**
- sending ip4 eth pkts between routed interfaces
- 2 routed interfaces
- 2 bridged interfaces
- 64B, 512B, 1518B, 9200B (ether_size)
- burst of pkts per interface
- 257pkts per burst
- routed pkts hitting different FIB entries
- bridged pkts hitting different MAC entries
**verify**
- all packets received correctly
"""
import unittest
from random import choice
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from framework import VppTestCase, VppTestRunner
from vpp_mac import mactobinary
from vpp_papi_provider import L2_PORT_TYPE
class TestIpIrb(VppTestCase):
"""IRB Test Case"""
@classmethod
def setUpClass(cls):
"""
#. Create BD with MAC learning enabled and put interfaces to this BD.
#. Configure IPv4 addresses on loopback interface and routed interface.
#. Configure MAC address binding to IPv4 neighbors on loop0.
#. Configure MAC address on pg2.
#. Loopback BVI interface has remote hosts, one half of hosts are
behind pg0 second behind pg1.
"""
super(TestIpIrb, cls).setUpClass()
cls.pg_if_packet_sizes = [64, 512, 1518, 9018] # packet sizes
cls.bd_id = 10
cls.remote_hosts_count = 250
# create 3 pg interfaces, 1 loopback interface
cls.create_pg_interfaces(range(3))
cls.create_loopback_interfaces(1)
cls.interfaces = list(cls.pg_interfaces)
cls.interfaces.extend(cls.lo_interfaces)
for i in cls.interfaces:
i.admin_up()
# Create BD with MAC learning enabled and put interfaces to this BD
cls.vapi.sw_interface_set_l2_bridge(
cls.loop0.sw_if_index, bd_id=cls.bd_id,
port_type=L2_PORT_TYPE.BVI)
cls.vapi.sw_interface_set_l2_bridge(
cls.pg0.sw_if_index, bd_id=cls.bd_id)
cls.vapi.sw_interface_set_l2_bridge(
cls.pg1.sw_if_index, bd_id=cls.bd_id)
# Configure IPv4 addresses on loopback interface and routed interface
cls.loop0.config_ip4()
cls.pg2.config_ip4()
# Configure MAC address binding to IPv4 neighbors on loop0
cls.loop0.generate_remote_hosts(cls.remote_hosts_count)
cls.loop0.configure_ipv4_neighbors()
# configure MAC address on pg2
cls.pg2.resolve_arp()
# Loopback BVI interface has remote hosts, one half of hosts are behind
# pg0 second behind pg1
half = cls.remote_hosts_count // 2
cls.pg0.remote_hosts = cls.loop0.remote_hosts[:half]
cls.pg1.remote_hosts = cls.loop0.remote_hosts[half:]
def tearDown(self):
"""Run standard test teardown and log ``show l2patch``,
``show l2fib verbose``,``show bridge-domain <bd_id> detail``,
``show ip arp``.
"""
super(TestIpIrb, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.cli("show l2patch"))
self.logger.info(self.vapi.cli("show l2fib verbose"))
self.logger.info(self.vapi.cli("show bridge-domain %s detail" %
self.bd_id))
self.logger.info(self.vapi.cli("show ip arp"))
def create_stream(self, src_ip_if, dst_ip_if, packet_sizes):
pkts = []
for i in range(0, 257):
remote_dst_host = choice(dst_ip_if.remote_hosts)
info = self.create_packet_info(src_ip_if, dst_ip_if)
payload = self.info_to_payload(info)
p = (Ether(dst=src_ip_if.local_mac, src=src_ip_if.remote_mac) /
IP(src=src_ip_if.remote_ip4,
dst=remote_dst_host.ip4) /
UDP(sport=1234, dport=1234) /
Raw(payload))
info.data = p.copy()
size = packet_sizes[(i // 2) % len(packet_sizes)]
self.extend_packet(p, size)
pkts.append(p)
return pkts
def create_stream_l2_to_ip(self, src_l2_if, src_ip_if, dst_ip_if,
packet_sizes):
pkts = []
for i in range(0, 257):
info = self.create_packet_info(src_ip_if, dst_ip_if)
payload = self.info_to_payload(info)
host = choice(src_l2_if.remote_hosts)
p = (Ether(src=host.mac,
dst=src_ip_if.local_mac) /
IP(src=host.ip4,
dst=dst_ip_if.remote_ip4) /
UDP(sport=1234, dport=1234) /
Raw(payload))
info.data = p.copy()
size = packet_sizes[(i // 2) % len(packet_sizes)]
self.extend_packet(p, size)
pkts.append(p)
return pkts
def verify_capture_l2_to_ip(self, dst_ip_if, src_ip_if, capture):
last_info = dict()
for i in self.interfaces:
last_info[i.sw_if_index] = None
dst_ip_sw_if_index = dst_ip_if.sw_if_index
for packet in capture:
ip = packet[IP]
udp = packet[IP][UDP]
payload_info = self.payload_to_info(str(packet[IP][UDP][Raw]))
self.assertEqual(payload_info.dst, dst_ip_sw_if_index)
next_info = self.get_next_packet_info_for_interface2(
payload_info.src, dst_ip_sw_if_index,
last_info[payload_info.src])
last_info[payload_info.src] = next_info
self.assertTrue(next_info is not None)
saved_packet = next_info.data
self.assertTrue(next_info is not None)
# MAC: src, dst
self.assertEqual(packet.src, dst_ip_if.local_mac)
self.assertEqual(packet.dst, dst_ip_if.remote_mac)
# IP: src, dst
host = src_ip_if.host_by_ip4(ip.src)
self.assertIsNotNone(host)
self.assertEqual(ip.dst, saved_packet[IP].dst)
self.assertEqual(ip.dst, dst_ip_if.remote_ip4)
# UDP:
self.assertEqual(udp.sport, saved_packet[UDP].sport)
self.assertEqual(udp.dport, saved_packet[UDP].dport)
def verify_capture(self, dst_ip_if, src_ip_if, capture):
last_info = dict()
for i in self.interfaces:
last_info[i.sw_if_index] = None
dst_ip_sw_if_index = dst_ip_if.sw_if_index
for packet in capture:
ip = packet[IP]
udp = packet[IP][UDP]
payload_info = self.payload_to_info(str(packet[IP][UDP][Raw]))
packet_index = payload_info.index
self.assertEqual(payload_info.dst, dst_ip_sw_if_index)
next_info = self.get_next_packet_info_for_interface2(
payload_info.src, dst_ip_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
self.assertTrue(next_info is not None)
# MAC: src, dst
self.assertEqual(packet.src, dst_ip_if.local_mac)
host = dst_ip_if.host_by_mac(packet.dst)
# IP: src, dst
self.assertEqual(ip.src, src_ip_if.remote_ip4)
self.assertEqual(ip.dst, saved_packet[IP].dst)
self.assertEqual(ip.dst, host.ip4)
# UDP:
self.assertEqual(udp.sport, saved_packet[UDP].sport)
self.assertEqual(udp.dport, saved_packet[UDP].dport)
def test_ip4_irb_1(self):
""" IPv4 IRB test 1
Test scenario:
- ip traffic from pg2 interface must ends in both pg0 and pg1
- arp entry present in loop0 interface for destination IP
- no l2 entree configured, pg0 and pg1 are same
"""
stream = self.create_stream(
self.pg2, self.loop0, self.pg_if_packet_sizes)
self.pg2.add_stream(stream)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
packet_count = self.get_packet_count_for_if_idx(self.loop0.sw_if_index)
rcvd1 = self.pg0.get_capture(packet_count)
rcvd2 = self.pg1.get_capture(packet_count)
self.verify_capture(self.loop0, self.pg2, rcvd1)
self.verify_capture(self.loop0, self.pg2, rcvd2)
self.assertListEqual(rcvd1.res, rcvd2.res)
def send_and_verify_l2_to_ip(self):
stream1 = self.create_stream_l2_to_ip(
self.pg0, self.loop0, self.pg2, self.pg_if_packet_sizes)
stream2 = self.create_stream_l2_to_ip(
self.pg1, self.loop0, self.pg2, self.pg_if_packet_sizes)
self.vapi.cli("clear trace")
self.pg0.add_stream(stream1)
self.pg1.add_stream(stream2)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rcvd = self.pg2.get_capture(514)
self.verify_capture_l2_to_ip(self.pg2, self.loop0, rcvd)
def test_ip4_irb_2(self):
""" IPv4 IRB test 2
Test scenario:
- ip traffic from pg0 and pg1 ends on pg2
"""
self.send_and_verify_l2_to_ip()
# change the BVI's mac and resed traffic
self.loop0.set_mac("00:00:00:11:11:33")
self.send_and_verify_l2_to_ip()
# check it wasn't flooded
self.pg1.assert_nothing_captured(remark="UU Flood")
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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