aboutsummaryrefslogtreecommitdiffstats
path: root/test/test_ip4_irb.py
blob: a7fe7875053ddfb45f19e1e36b4762fb2cad8d9e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
#!/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)