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#!/usr/bin/env python
import unittest
from random import choice, randint
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from logging import *
from framework import VppTestCase, VppTestRunner
""" IRB Test Case
config
L2 MAC learning enabled in l2bd
2 routed interfaces untagged, bvi
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
"""
class TestIpIrb(VppTestCase):
""" IRB Test Case """
@classmethod
def setUpClass(cls):
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(range(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, bvi=1)
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)
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_extend_ipv4_mac_binding()
# configure MAC address on pg2
cls.pg2.resolve_arp()
# 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):
super(TestIpIrb, self).tearDown()
if not self.vpp_dead:
info(self.vapi.cli("show l2patch"))
info(self.vapi.cli("show l2fib verbose"))
info(self.vapi.cli("show bridge-domain %s detail" % self.bd_id))
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.sw_if_index, dst_ip_if.sw_if_index)
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.sw_if_index, dst_ip_if.sw_if_index)
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]))
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)
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 dst 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()
rcvd1 = self.pg0.get_capture()
rcvd2 = self.pg1.get_capture()
self.verify_capture(self.loop0, self.pg2, rcvd1)
self.verify_capture(self.loop0, self.pg2, rcvd2)
self.assertListEqual(rcvd1.res, rcvd2.res)
def test_ip4_irb_2(self):
""" IPv4 IRB test 2
Test scenario:
ip traffic from pg0 and pg1 ends on pg2
"""
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.pg0.add_stream(stream1)
self.pg1.add_stream(stream2)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rcvd = self.pg2.get_capture()
self.verify_capture_l2_to_ip(self.pg2, self.loop0, rcvd)
self.assertEqual(len(stream1) + len(stream2), len(rcvd.res))
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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