aboutsummaryrefslogtreecommitdiffstats
path: root/test/test_map_br.py
blob: 0de0e31520c637262385396d21731755e5c7c567 (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
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
@import "helpers/clearfix";
@import "helpers/color-bg";
@import "helpers/colored-links";
@import "helpers/ratio";
@import "helpers/position";
@import "helpers/stacks";
@import "helpers/visually-hidden";
@import "helpers/stretched-link";
@import "helpers/text-truncation";
@import "helpers/vr";
48'>448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 
#!/usr/bin/env python3

import unittest

from framework import VppTestCase
from asfframework import VppTestRunner
from vpp_ip_route import VppIpRoute, VppRoutePath

from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP, ICMP, TCP, IPerror, UDPerror
from scapy.layers.inet6 import IPv6, ICMPv6TimeExceeded, ICMPv6PacketTooBig
from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply, IPerror6


class TestMAPBR(VppTestCase):
    """MAP-T Test Cases"""

    @classmethod
    def setUpClass(cls):
        super(TestMAPBR, cls).setUpClass()

    @classmethod
    def tearDownClass(cls):
        super(TestMAPBR, cls).tearDownClass()

    def setUp(self):
        super(TestMAPBR, self).setUp()

        #
        # Create 2 pg interfaces.
        # pg0 is IPv4
        # pg1 is IPv6
        #
        self.create_pg_interfaces(range(2))

        self.pg0.admin_up()
        self.pg0.config_ip4()
        self.pg1.generate_remote_hosts(20)
        self.pg1.configure_ipv4_neighbors()
        self.pg0.resolve_arp()

        self.pg1.admin_up()
        self.pg1.config_ip6()
        self.pg1.generate_remote_hosts(20)
        self.pg1.configure_ipv6_neighbors()

        #
        # BR configuration parameters used for all test.
        #
        self.ip4_prefix = "198.18.0.0/24"
        self.ip6_prefix = "2001:db8:f0::/48"
        self.ip6_src = "2001:db8:ffff:ff00::/64"
        self.ea_bits_len = 12
        self.psid_offset = 6
        self.psid_length = 4
        self.mtu = 1500
        self.tag = "MAP-T BR"

        self.ipv4_internet_address = self.pg0.remote_ip4
        self.ipv4_map_address = "198.18.0.12"
        self.ipv4_udp_or_tcp_internet_port = 65000
        self.ipv4_udp_or_tcp_map_port = 16606

        self.ipv6_cpe_address = "2001:db8:f0:c30:0:c612:c:3"  # 198.18.0.12
        self.ipv6_spoof_address = "2001:db8:f0:c30:0:c612:1c:3"  # 198.18.0.28
        self.ipv6_spoof_prefix = "2001:db8:f0:c30:0:a00:c:3"  # 10.0.0.12
        self.ipv6_spoof_psid = "2001:db8:f0:c30:0:c612:c:4"  # 4
        self.ipv6_spoof_subnet = "2001:db8:f1:c30:0:c612:c:3"  # f1

        self.ipv6_udp_or_tcp_internet_port = 65000
        self.ipv6_udp_or_tcp_map_port = 16606
        self.ipv6_udp_or_tcp_spoof_port = 16862

        self.ipv6_map_address = "2001:db8:ffff:ff00:ac:1001:200:0"  # 176.16.1.2
        self.ipv6_map_same_rule_diff_addr = (
            "2001:db8:ffff:ff00:c6:1200:1000:0"  # 198.18.0.16
        )
        self.ipv6_map_same_rule_same_addr = (
            "2001:db8:ffff:ff00:c6:1200:c00:0"  # 198.18.0.12
        )

        self.map_br_prefix = "2001:db8:f0::"
        self.map_br_prefix_len = 48
        self.psid_number = 3

        #
        # Add an IPv6 route to the MAP-BR.
        #
        map_route = VppIpRoute(
            self,
            self.map_br_prefix,
            self.map_br_prefix_len,
            [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)],
        )
        map_route.add_vpp_config()

        #
        # Add a MAP BR domain that maps from pg0 to pg1.
        #
        self.vapi.map_add_domain(
            ip4_prefix=self.ip4_prefix,
            ip6_prefix=self.ip6_prefix,
            ip6_src=self.ip6_src,
            ea_bits_len=self.ea_bits_len,
            psid_offset=self.psid_offset,
            psid_length=self.psid_length,
            mtu=self.mtu,
            tag=self.tag,
        )

        #
        # Set BR parameters.
        #
        self.vapi.map_param_set_fragmentation(inner=1, ignore_df=0)
        self.vapi.map_param_set_fragmentation(inner=0, ignore_df=0)
        self.vapi.map_param_set_icmp(ip4_err_relay_src=self.pg0.local_ip4)
        self.vapi.map_param_set_traffic_class(copy=1)

        #
        # Enable MAP-T on interfaces.
        #
        self.vapi.map_if_enable_disable(
            is_enable=1, sw_if_index=self.pg0.sw_if_index, is_translation=1
        )

        self.vapi.map_if_enable_disable(
            is_enable=1, sw_if_index=self.pg1.sw_if_index, is_translation=1
        )

        self.vapi.map_if_enable_disable(
            is_enable=1, sw_if_index=self.pg1.sw_if_index, is_translation=1
        )

    def tearDown(self):
        super(TestMAPBR, self).tearDown()
        for i in self.pg_interfaces:
            i.unconfig_ip4()
            i.unconfig_ip6()
            i.admin_down()

    def v4_address_check(self, pkt):
        self.assertEqual(pkt[IP].src, self.ipv4_map_address)
        self.assertEqual(pkt[IP].dst, self.ipv4_internet_address)

    def v4_port_check(self, pkt, proto):
        self.assertEqual(pkt[proto].sport, self.ipv4_udp_or_tcp_map_port)
        self.assertEqual(pkt[proto].dport, self.ipv4_udp_or_tcp_internet_port)

    def v6_address_check(self, pkt):
        self.assertEqual(pkt[IPv6].src, self.ipv6_map_address)
        self.assertEqual(pkt[IPv6].dst, self.ipv6_cpe_address)

    def v6_port_check(self, pkt, proto):
        self.assertEqual(pkt[proto].sport, self.ipv6_udp_or_tcp_internet_port)
        self.assertEqual(pkt[proto].dport, self.ipv6_udp_or_tcp_map_port)

    #
    # Normal translation of UDP packets v4 -> v6 direction
    # Send 128 frame size packet for IPv4/UDP.
    # Received packet should be translated into IPv6 packet with no
    # fragment header.
    #

    def test_map_t_udp_ip4_to_ip6(self):
        """MAP-T UDP IPv4 -> IPv6"""

        eth = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
        ip = IP(src=self.pg0.remote_ip4, dst=self.ipv4_map_address, tos=0)
        udp = UDP(
            sport=self.ipv4_udp_or_tcp_internet_port,
            dport=self.ipv4_udp_or_tcp_map_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg0, tx_pkt * 1)

        rx_pkts = self.pg1.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.v6_address_check(rx_pkt)
        self.v6_port_check(rx_pkt, UDP)
        self.assertEqual(rx_pkt[IPv6].tc, 0)  # IPv4 ToS passed to v6 TC
        self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="UDP").nh)

    #
    # Normal translation of TCP packets v4 -> v6 direction.
    # Send 128 frame size packet for IPv4/TCP.
    # Received packet should be translated into IPv6 packet with no
    # fragment header.
    #

    def test_map_t_tcp_ip4_to_ip6(self):
        """MAP-T TCP IPv4 -> IPv6"""

        eth = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
        ip = IP(src=self.pg0.remote_ip4, dst=self.ipv4_map_address, tos=0)
        tcp = TCP(
            sport=self.ipv4_udp_or_tcp_internet_port,
            dport=self.ipv4_udp_or_tcp_map_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / tcp / payload

        self.pg_send(self.pg0, tx_pkt * 1)

        rx_pkts = self.pg1.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.v6_address_check(rx_pkt)
        self.v6_port_check(rx_pkt, TCP)
        self.assertEqual(rx_pkt[IPv6].tc, 0)  # IPv4 ToS passed to v6 TC
        self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="TCP").nh)

    #
    # Normal translation of UDP packets v6 -> v4 direction
    # Send 128 frame size packet for IPv6/UDP.
    # Received packet should be translated into an IPv4 packet with DF=1.
    #

    def test_map_t_udp_ip6_to_ip4(self):
        """MAP-T UDP IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        udp = UDP(
            sport=self.ipv6_udp_or_tcp_map_port,
            dport=self.ipv6_udp_or_tcp_internet_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg0.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.v4_address_check(rx_pkt)
        self.v4_port_check(rx_pkt, UDP)
        self.assertEqual(rx_pkt[IP].proto, IP(proto="udp").proto)
        self.assertEqual(rx_pkt[IP].tos, 0)  # IPv6 TC passed to v4 ToS
        df_bit = IP(flags="DF").flags
        self.assertNotEqual(rx_pkt[IP].flags & df_bit, df_bit)

    #
    # Normal translation of TCP packets v6 -> v4 direction
    # Send 128 frame size packet for IPv6/TCP.
    # Received packet should be translated into an IPv4 packet with DF=1
    #

    def test_map_t_tcp_ip6_to_ip4(self):
        """MAP-T TCP IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        tcp = TCP(
            sport=self.ipv6_udp_or_tcp_map_port,
            dport=self.ipv6_udp_or_tcp_internet_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / tcp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg0.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.v4_address_check(rx_pkt)
        self.v4_port_check(rx_pkt, TCP)
        self.assertEqual(rx_pkt[IP].proto, IP(proto="tcp").proto)
        self.assertEqual(rx_pkt[IP].tos, 0)  # IPv6 TC passed to v4 ToS
        df_bit = IP(flags="DF").flags
        self.assertNotEqual(rx_pkt[IP].flags & df_bit, df_bit)

    #
    # Translation of ICMP Echo Request v4 -> v6 direction
    # Received packet should be translated into an IPv6 Echo Request.
    #

    def test_map_t_echo_request_ip4_to_ip6(self):
        """MAP-T echo request IPv4 -> IPv6"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IP(src=self.pg0.remote_ip4, dst=self.ipv4_map_address)
        icmp = ICMP(type="echo-request", id=self.ipv6_udp_or_tcp_map_port)
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / payload

        self.pg_send(self.pg0, tx_pkt * 1)

        rx_pkts = self.pg1.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="ICMPv6").nh)
        self.assertEqual(
            rx_pkt[ICMPv6EchoRequest].type, ICMPv6EchoRequest(type="Echo Request").type
        )
        self.assertEqual(rx_pkt[ICMPv6EchoRequest].code, 0)
        self.assertEqual(rx_pkt[ICMPv6EchoRequest].id, self.ipv6_udp_or_tcp_map_port)

    #
    # Translation of ICMP Echo Reply v4 -> v6 direction
    # Received packet should be translated into an IPv6 Echo Reply.
    #

    def test_map_t_echo_reply_ip4_to_ip6(self):
        """MAP-T echo reply IPv4 -> IPv6"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IP(src=self.pg0.remote_ip4, dst=self.ipv4_map_address)
        icmp = ICMP(type="echo-reply", id=self.ipv6_udp_or_tcp_map_port)
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / payload

        self.pg_send(self.pg0, tx_pkt * 1)

        rx_pkts = self.pg1.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="ICMPv6").nh)
        self.assertEqual(
            rx_pkt[ICMPv6EchoReply].type, ICMPv6EchoReply(type="Echo Reply").type
        )
        self.assertEqual(rx_pkt[ICMPv6EchoReply].code, 0)
        self.assertEqual(rx_pkt[ICMPv6EchoReply].id, self.ipv6_udp_or_tcp_map_port)

    #
    # Translation of ICMP Time Exceeded v4 -> v6 direction
    # Received packet should be translated into an IPv6 Time Exceeded.
    #

    def test_map_t_time_exceeded_ip4_to_ip6(self):
        """MAP-T time exceeded IPv4 -> IPv6"""

        eth = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
        ip = IP(src=self.pg0.remote_ip4, dst=self.ipv4_map_address)
        icmp = ICMP(type="time-exceeded", code="ttl-zero-during-transit")
        ip_inner = IP(dst=self.pg0.remote_ip4, src=self.ipv4_map_address, ttl=1)
        udp_inner = UDP(
            sport=self.ipv4_udp_or_tcp_map_port,
            dport=self.ipv4_udp_or_tcp_internet_port,
        )
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / ip_inner / udp_inner / payload

        self.pg_send(self.pg0, tx_pkt * 1)

        rx_pkts = self.pg1.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.v6_address_check(rx_pkt)
        self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="ICMPv6").nh)
        self.assertEqual(rx_pkt[ICMPv6TimeExceeded].type, ICMPv6TimeExceeded().type)
        self.assertEqual(
            rx_pkt[ICMPv6TimeExceeded].code,
            ICMPv6TimeExceeded(code="hop limit exceeded in transit").code,
        )
        self.assertEqual(rx_pkt[ICMPv6TimeExceeded].hlim, tx_pkt[IP][1].ttl)
        self.assertTrue(rx_pkt.haslayer(IPerror6))
        self.assertTrue(rx_pkt.haslayer(UDPerror))
        self.assertEqual(rx_pkt[IPv6].src, rx_pkt[IPerror6].dst)
        self.assertEqual(rx_pkt[IPv6].dst, rx_pkt[IPerror6].src)
        self.assertEqual(rx_pkt[UDPerror].sport, self.ipv6_udp_or_tcp_map_port)
        self.assertEqual(rx_pkt[UDPerror].dport, self.ipv6_udp_or_tcp_internet_port)

    #
    # Translation of ICMP Echo Request v6 -> v4 direction
    # Received packet should be translated into an IPv4 Echo Request.
    #

    def test_map_t_echo_request_ip6_to_ip4(self):
        """MAP-T echo request IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        icmp = ICMPv6EchoRequest()
        icmp.id = self.ipv6_udp_or_tcp_map_port
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg0.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.assertEqual(rx_pkt[IP].proto, IP(proto="icmp").proto)
        self.assertEqual(rx_pkt[ICMP].type, ICMP(type="echo-request").type)
        self.assertEqual(rx_pkt[ICMP].code, 0)
        self.assertEqual(rx_pkt[ICMP].id, self.ipv6_udp_or_tcp_map_port)

    #
    # Translation of ICMP Echo Reply v6 -> v4 direction
    # Received packet should be translated into an IPv4 Echo Reply.
    #

    def test_map_t_echo_reply_ip6_to_ip4(self):
        """MAP-T echo reply IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        icmp = ICMPv6EchoReply(id=self.ipv6_udp_or_tcp_map_port)
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg0.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.assertEqual(rx_pkt[IP].proto, IP(proto="icmp").proto)
        self.assertEqual(rx_pkt[ICMP].type, ICMP(type="echo-reply").type)
        self.assertEqual(rx_pkt[ICMP].code, 0)
        self.assertEqual(rx_pkt[ICMP].id, self.ipv6_udp_or_tcp_map_port)

    #
    # Translation of ICMP Packet Too Big v6 -> v4 direction
    # Received packet should be translated into an IPv4 Dest Unreachable.
    #

    def test_map_t_packet_too_big_ip6_to_ip4(self):
        """MAP-T packet too big IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        icmp = ICMPv6PacketTooBig(mtu=1280)
        ip_inner = IPv6(src=self.ipv6_map_address, dst=self.ipv6_cpe_address)
        udp_inner = UDP(
            sport=self.ipv6_udp_or_tcp_internet_port,
            dport=self.ipv6_udp_or_tcp_map_port,
        )
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / ip_inner / udp_inner / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg0.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.v4_address_check(rx_pkt)
        self.assertEqual(rx_pkt[IP].proto, IP(proto="icmp").proto)
        self.assertEqual(rx_pkt[ICMP].type, ICMP(type="dest-unreach").type)
        self.assertEqual(rx_pkt[ICMP].code, ICMP(code="fragmentation-needed").code)
        self.assertEqual(rx_pkt[ICMP].nexthopmtu, tx_pkt[ICMPv6PacketTooBig].mtu - 20)
        self.assertTrue(rx_pkt.haslayer(IPerror))
        self.assertTrue(rx_pkt.haslayer(UDPerror))
        self.assertEqual(rx_pkt[IP].src, rx_pkt[IPerror].dst)
        self.assertEqual(rx_pkt[IP].dst, rx_pkt[IPerror].src)
        self.assertEqual(rx_pkt[UDPerror].sport, self.ipv4_udp_or_tcp_internet_port)
        self.assertEqual(rx_pkt[UDPerror].dport, self.ipv4_udp_or_tcp_map_port)

    #
    # Translation of ICMP Time Exceeded v6 -> v4 direction
    # Received packet should be translated into an IPv4 Time Exceeded.
    #

    def test_map_t_time_exceeded_ip6_to_ip4(self):
        """MAP-T time exceeded IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        icmp = ICMPv6TimeExceeded()
        ip_inner = IPv6(src=self.ipv6_map_address, dst=self.ipv6_cpe_address, hlim=1)
        udp_inner = UDP(
            sport=self.ipv6_udp_or_tcp_internet_port,
            dport=self.ipv6_udp_or_tcp_map_port,
        )
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / ip_inner / udp_inner / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg0.get_capture(1)
        rx_pkt = rx_pkts[0]

        self.v4_address_check(rx_pkt)
        self.assertEqual(rx_pkt[IP].proto, IP(proto="icmp").proto)
        self.assertEqual(rx_pkt[ICMP].type, ICMP(type="time-exceeded").type)
        self.assertEqual(rx_pkt[ICMP].code, ICMP(code="ttl-zero-during-transit").code)
        self.assertEqual(rx_pkt[ICMP].ttl, tx_pkt[IPv6][1].hlim)
        self.assertTrue(rx_pkt.haslayer(IPerror))
        self.assertTrue(rx_pkt.haslayer(UDPerror))
        self.assertEqual(rx_pkt[IP].src, rx_pkt[IPerror].dst)
        self.assertEqual(rx_pkt[IP].dst, rx_pkt[IPerror].src)
        self.assertEqual(rx_pkt[UDPerror].sport, self.ipv4_udp_or_tcp_internet_port)
        self.assertEqual(rx_pkt[UDPerror].dport, self.ipv4_udp_or_tcp_map_port)

    #
    # Spoofed IPv4 Source Address v6 -> v4 direction
    # Send a packet with a wrong IPv4 address embedded in bits 72-103.
    # The BR should either drop the packet, or rewrite the spoofed
    # source IPv4 as the actual source IPv4 address.
    # The BR really should drop the packet.
    #

    def test_map_t_spoof_ipv4_src_addr_ip6_to_ip4(self):
        """MAP-T spoof ipv4 src addr IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_spoof_address, dst=self.ipv6_map_address)
        udp = UDP(
            sport=self.ipv6_udp_or_tcp_map_port,
            dport=self.ipv6_udp_or_tcp_internet_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        self.pg0.get_capture(0, timeout=1)
        self.pg0.assert_nothing_captured(remark="Should drop IPv4 spoof address")

    #
    # Spoofed IPv4 Source Prefix v6 -> v4 direction
    # Send a packet with a wrong IPv4 prefix embedded in bits 72-103.
    # The BR should either drop the packet, or rewrite the source IPv4
    # to the prefix that matches the source IPv4 address.
    #

    def test_map_t_spoof_ipv4_src_prefix_ip6_to_ip4(self):
        """MAP-T spoof ipv4 src prefix IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_spoof_prefix, dst=self.ipv6_map_address)
        udp = UDP(
            sport=self.ipv6_udp_or_tcp_map_port,
            dport=self.ipv6_udp_or_tcp_internet_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        self.pg0.get_capture(0, timeout=1)
        self.pg0.assert_nothing_captured(remark="Should drop IPv4 spoof prefix")

    #
    # Spoofed IPv6 PSID v6 -> v4 direction
    # Send a packet with a wrong IPv6 port PSID
    # The BR should drop the packet.
    #

    def test_map_t_spoof_psid_ip6_to_ip4(self):
        """MAP-T spoof psid IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_spoof_psid, dst=self.ipv6_map_address)
        udp = UDP(
            sport=self.ipv6_udp_or_tcp_map_port,
            dport=self.ipv6_udp_or_tcp_internet_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        self.pg0.get_capture(0, timeout=1)
        self.pg0.assert_nothing_captured(remark="Should drop IPv6 spoof PSID")

    #
    # Spoofed IPv6 subnet field v6 -> v4 direction
    # Send a packet with a wrong IPv6 subnet as "2001:db8:f1"
    # The BR should drop the packet.
    #

    def test_map_t_spoof_subnet_ip6_to_ip4(self):
        """MAP-T spoof subnet IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_spoof_subnet, dst=self.ipv6_map_address)
        udp = UDP(
            sport=self.ipv6_udp_or_tcp_map_port,
            dport=self.ipv6_udp_or_tcp_internet_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        self.pg0.get_capture(0, timeout=1)
        self.pg0.assert_nothing_captured(remark="Should drop IPv6 spoof subnet")

    #
    # Spoofed IPv6 port PSID v6 -> v4 direction
    # Send a packet with a wrong IPv6 port PSID
    # The BR should drop the packet.
    #

    def test_map_t_spoof_port_psid_ip6_to_ip4(self):
        """MAP-T spoof port psid IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        udp = UDP(
            sport=self.ipv6_udp_or_tcp_spoof_port,
            dport=self.ipv6_udp_or_tcp_internet_port,
        )
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        self.pg0.get_capture(0, timeout=1)
        self.pg0.assert_nothing_captured(remark="Should drop IPv6 spoof port PSID")

    #
    # Spoofed IPv6 ICMP ID PSID v6 -> v4 direction
    # Send a packet with a wrong IPv6 IMCP ID PSID
    # The BR should drop the packet.
    #

    def test_map_t_spoof_icmp_id_psid_ip6_to_ip4(self):
        """MAP-T spoof ICMP id psid IPv6 -> IPv4"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_address)
        icmp = ICMPv6EchoRequest()
        icmp.id = self.ipv6_udp_or_tcp_spoof_port
        payload = "H" * 10
        tx_pkt = eth / ip / icmp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        self.pg0.get_capture(0, timeout=1)
        self.pg0.assert_nothing_captured(remark="Should drop IPv6 spoof port PSID")

    #
    # Map to Map - same rule, different address
    #

    @unittest.skip("Fixme: correct behavior needs clarification")
    def test_map_t_same_rule_diff_addr_ip6_to_ip4(self):
        """MAP-T same rule, diff addr IPv6 -> IPv6"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_same_rule_diff_addr)
        udp = UDP(sport=self.ipv6_udp_or_tcp_map_port, dport=1025)
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg1.get_capture(1)
        rx_pkt = rx_pkts[0]

    #
    # Map to Map - same rule, same address
    #

    @unittest.skip("Fixme: correct behavior needs clarification")
    def test_map_t_same_rule_same_addr_ip6_to_ip4(self):
        """MAP-T same rule, same addr IPv6 -> IPv6"""

        eth = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        ip = IPv6(src=self.ipv6_cpe_address, dst=self.ipv6_map_same_rule_same_addr)
        udp = UDP(sport=self.ipv6_udp_or_tcp_map_port, dport=1025)
        payload = "a" * 82
        tx_pkt = eth / ip / udp / payload

        self.pg_send(self.pg1, tx_pkt * 1)

        rx_pkts = self.pg1.get_capture(1)
        rx_pkt = rx_pkts[0]


if __name__ == "__main__":
    unittest.main(testRunner=VppTestRunner)