l2: add l2 learn limit tests
[vpp.git] / test / test_l2bd_learnlimit.py
1 #!/usr/bin/env python3
2
3 import unittest
4 import random
5
6 from scapy.packet import Raw
7 from scapy.layers.l2 import Ether
8 from scapy.layers.inet import IP, UDP
9
10 from framework import VppTestCase, VppTestRunner, running_extended_tests
11 from util import Host, ppp
12
13
14 class TestL2LearnLimit(VppTestCase):
15     """ L2 Learn limit Test Case """
16
17     @classmethod
18     def setUpClass(self):
19         super(TestL2LearnLimit, self).setUpClass()
20         self.create_pg_interfaces(range(2))
21
22     @classmethod
23     def tearDownClass(cls):
24         super(TestL2LearnLimit, cls).tearDownClass()
25
26     def create_hosts(self, pg_if, n_hosts_per_if, subnet):
27         """
28         Create required number of host MAC addresses and distribute them among
29         interfaces. Create host IPv4 address for every host MAC address.
30
31         :param int n_hosts_per_if: Number of per interface hosts to
32         create MAC/IPv4 addresses for.
33         """
34
35         hosts = dict()
36         swif = pg_if.sw_if_index
37
38         def mac(j): return "00:00:%02x:ff:%02x:%02x" % (subnet, swif, j)
39
40         def ip(j): return "172.%02u.1%02x.%u" % (subnet, swif, j)
41
42         def h(j): return Host(mac(j), ip(j))
43         hosts[swif] = [h(j) for j in range(n_hosts_per_if)]
44
45         return hosts
46
47     def learn_hosts(self, pg_if, bd_id, hosts):
48         """
49         Create and send per interface L2 MAC broadcast packet stream to
50         let the bridge domain learn these MAC addresses.
51
52         :param int bd_id: BD to teach
53         :param dict hosts: dict of hosts per interface
54         """
55
56         self.vapi.bridge_flags(bd_id=bd_id, is_set=1, flags=1)
57
58         swif = pg_if.sw_if_index
59         packets = [Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac)
60                    for host in hosts[swif]]
61         pg_if.add_stream(packets)
62         self.logger.info("Sending broadcast eth frames for MAC learning")
63         self.pg_start()
64
65     def test_l2bd_learnlimit01(self):
66         """ L2BD test without learn Limit
67         """
68         hosts = self.create_hosts(self.pg_interfaces[0], 20, 1)
69         self.learn_hosts(self.pg_interfaces[0], 1, hosts)
70         lfs = self.vapi.l2_fib_table_dump(1)
71
72         # check that 20 macs are learned.
73         self.assertEqual(len(lfs), 20)
74
75     def test_l2bd_learnlimit02(self):
76         """ L2BD test with learn Limit
77         """
78         self.vapi.want_l2_macs_events(enable_disable=1, learn_limit=10)
79         hosts = self.create_hosts(self.pg_interfaces[0], 20, 1)
80         fhosts = self.create_hosts(self.pg_interfaces[1], 1, 2)
81
82         # inject 20 mac addresses on bd1
83         self.learn_hosts(self.pg_interfaces[0], 1, hosts)
84
85         # inject 1 mac address on bd2
86         self.learn_hosts(self.pg_interfaces[1], 2, fhosts)
87
88         lfs1 = self.vapi.l2_fib_table_dump(1)
89         lfs2 = self.vapi.l2_fib_table_dump(2)
90
91         # check that only 10 macs are learned.
92         self.assertEqual(len(lfs1), 10)
93
94         # check that bd2 was not able to learn
95         self.assertEqual(len(lfs2), 0)
96
97     def setUp(self):
98         super(TestL2LearnLimit, self).setUp()
99
100         self.vapi.bridge_domain_add_del(bd_id=1)
101         self.vapi.bridge_domain_add_del(bd_id=2)
102
103         self.vapi.sw_interface_set_l2_bridge(
104             self.pg_interfaces[0].sw_if_index, bd_id=1)
105         self.vapi.sw_interface_set_l2_bridge(
106             self.pg_interfaces[1].sw_if_index, bd_id=2)
107
108     def tearDown(self):
109         for i in self.pg_interfaces[:2]:
110             self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
111                                                  bd_id=1, enable=0)
112         self.vapi.bridge_domain_add_del(bd_id=1, is_add=0)
113         self.vapi.bridge_domain_add_del(bd_id=2, is_add=0)
114
115         super(TestL2LearnLimit, self).tearDown()
116
117
118 if __name__ == '__main__':
119     unittest.main(testRunner=VppTestRunner)