test/test_dhcp6.py

   1 from socket import AF_INET6
   2
   3 from scapy.layers.dhcp6 import DHCP6_Advertise, DHCP6OptClientId, \
   4     DHCP6OptStatusCode, DHCP6OptPref, DHCP6OptIA_PD, DHCP6OptIAPrefix, \
   5     DHCP6OptServerId, DHCP6_Solicit, DHCP6_Reply, DHCP6_Request, DHCP6_Renew, \
   6     DHCP6_Rebind, DUID_LL, DHCP6_Release, DHCP6OptElapsedTime, DHCP6OptIA_NA, \
   7     DHCP6OptIAAddress
   8 from scapy.layers.inet6 import IPv6, Ether, UDP
   9 from scapy.utils6 import in6_mactoifaceid
  10 from scapy.utils import inet_ntop, inet_pton
  11
  12 from framework import VppTestCase
  13 import util
  14
  15
  16 def ip6_normalize(ip6):
  17     return inet_ntop(AF_INET6, inet_pton(AF_INET6, ip6))
  18
  19
  20 class TestDHCPv6DataPlane(VppTestCase):
  21     """ DHCPv6 Data Plane Test Case """
  22
  23     @classmethod
  24     def setUpClass(cls):
  25         super(TestDHCPv6DataPlane, cls).setUpClass()
  26
  27     @classmethod
  28     def tearDownClass(cls):
  29         super(TestDHCPv6DataPlane, cls).tearDownClass()
  30
  31     def setUp(self):
  32         super(TestDHCPv6DataPlane, self).setUp()
  33
  34         self.create_pg_interfaces(range(1))
  35         self.interfaces = list(self.pg_interfaces)
  36         for i in self.interfaces:
  37             i.admin_up()
  38             i.config_ip6()
  39
  40         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
  41
  42     def tearDown(self):
  43         for i in self.interfaces:
  44             i.unconfig_ip6()
  45             i.admin_down()
  46         super(TestDHCPv6DataPlane, self).tearDown()
  47
  48     def test_dhcp_ia_na_send_solicit_receive_advertise(self):
  49         """ Verify DHCPv6 IA NA Solicit packet and Advertise event """
  50
  51         self.vapi.dhcp6_clients_enable_disable()
  52
  53         self.pg_enable_capture(self.pg_interfaces)
  54         self.pg_start()
  55         address_bin = '\00\01\00\02\00\03' + '\00' * 8 + '\00\05'
  56         address = {'address': address_bin,
  57                    'preferred_time': 60,
  58                    'valid_time': 120}
  59         self.vapi.dhcp6_send_client_message(msg_type=1,
  60                                             sw_if_index=self.pg0.sw_if_index,
  61                                             T1=20, T2=40, addresses=[address],
  62                                             n_addresses=len([address]))
  63         rx_list = self.pg0.get_capture(1)
  64         self.assertEqual(len(rx_list), 1)
  65         packet = rx_list[0]
  66
  67         self.assertEqual(packet.haslayer(IPv6), 1)
  68         self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1)
  69
  70         client_duid = packet[DHCP6OptClientId].duid
  71         trid = packet[DHCP6_Solicit].trid
  72
  73         dst = ip6_normalize(packet[IPv6].dst)
  74         dst2 = ip6_normalize("ff02::1:2")
  75         self.assert_equal(dst, dst2)
  76         src = ip6_normalize(packet[IPv6].src)
  77         src2 = ip6_normalize(self.pg0.local_ip6_ll)
  78         self.assert_equal(src, src2)
  79         ia_na = packet[DHCP6OptIA_NA]
  80         self.assert_equal(ia_na.T1, 20)
  81         self.assert_equal(ia_na.T2, 40)
  82         self.assert_equal(len(ia_na.ianaopts), 1)
  83         address = ia_na.ianaopts[0]
  84         self.assert_equal(address.addr, '1:2:3::5')
  85         self.assert_equal(address.preflft, 60)
  86         self.assert_equal(address.validlft, 120)
  87
  88         self.vapi.want_dhcp6_reply_events()
  89
  90         try:
  91             ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=60,
  92                                            validlft=120)
  93             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  94                  IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
  95                       dst=self.pg0.local_ip6_ll) /
  96                  UDP(sport=547, dport=546) /
  97                  DHCP6_Advertise(trid=trid) /
  98                  DHCP6OptServerId(duid=self.server_duid) /
  99                  DHCP6OptClientId(duid=client_duid) /
 100                  DHCP6OptPref(prefval=7) /
 101                  DHCP6OptStatusCode(statuscode=1) /
 102                  DHCP6OptIA_NA(iaid=1, T1=20, T2=40, ianaopts=ia_na_opts)
 103                  )
 104             self.pg0.add_stream([p])
 105             self.pg_start()
 106
 107             ev = self.vapi.wait_for_event(1, "dhcp6_reply_event")
 108
 109             self.assert_equal(ev.preference, 7)
 110             self.assert_equal(ev.status_code, 1)
 111             self.assert_equal(ev.T1, 20)
 112             self.assert_equal(ev.T2, 40)
 113
 114             reported_address = ev.addresses[0]
 115             address = inet_pton(AF_INET6, ia_na_opts.getfieldval("addr"))
 116             self.assert_equal(reported_address.address, address)
 117             self.assert_equal(reported_address.preferred_time,
 118                               ia_na_opts.getfieldval("preflft"))
 119             self.assert_equal(reported_address.valid_time,
 120                               ia_na_opts.getfieldval("validlft"))
 121
 122         finally:
 123             self.vapi.want_dhcp6_reply_events(enable_disable=0)
 124
 125     def test_dhcp_pd_send_solicit_receive_advertise(self):
 126         """ Verify DHCPv6 PD Solicit packet and Advertise event """
 127
 128         self.vapi.dhcp6_clients_enable_disable()
 129
 130         self.pg_enable_capture(self.pg_interfaces)
 131         self.pg_start()
 132         prefix_bin = '\00\01\00\02\00\03' + '\00' * 10
 133         prefix = {'prefix': prefix_bin,
 134                   'prefix_length': 50,
 135                   'preferred_time': 60,
 136                   'valid_time': 120}
 137         self.vapi.dhcp6_pd_send_client_message(1, self.pg0.sw_if_index,
 138                                                T1=20, T2=40, prefixes=[prefix])
 139         rx_list = self.pg0.get_capture(1)
 140         self.assertEqual(len(rx_list), 1)
 141         packet = rx_list[0]
 142
 143         self.assertEqual(packet.haslayer(IPv6), 1)
 144         self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1)
 145
 146         client_duid = packet[DHCP6OptClientId].duid
 147         trid = packet[DHCP6_Solicit].trid
 148
 149         dst = ip6_normalize(packet[IPv6].dst)
 150         dst2 = ip6_normalize("ff02::1:2")
 151         self.assert_equal(dst, dst2)
 152         src = ip6_normalize(packet[IPv6].src)
 153         src2 = ip6_normalize(self.pg0.local_ip6_ll)
 154         self.assert_equal(src, src2)
 155         ia_pd = packet[DHCP6OptIA_PD]
 156         self.assert_equal(ia_pd.T1, 20)
 157         self.assert_equal(ia_pd.T2, 40)
 158         self.assert_equal(len(ia_pd.iapdopt), 1)
 159         prefix = ia_pd.iapdopt[0]
 160         self.assert_equal(prefix.prefix, '1:2:3::')
 161         self.assert_equal(prefix.plen, 50)
 162         self.assert_equal(prefix.preflft, 60)
 163         self.assert_equal(prefix.validlft, 120)
 164
 165         self.vapi.want_dhcp6_pd_reply_events()
 166
 167         try:
 168             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=60,
 169                                           validlft=120)
 170             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 171                  IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 172                       dst=self.pg0.local_ip6_ll) /
 173                  UDP(sport=547, dport=546) /
 174                  DHCP6_Advertise(trid=trid) /
 175                  DHCP6OptServerId(duid=self.server_duid) /
 176                  DHCP6OptClientId(duid=client_duid) /
 177                  DHCP6OptPref(prefval=7) /
 178                  DHCP6OptStatusCode(statuscode=1) /
 179                  DHCP6OptIA_PD(iaid=1, T1=20, T2=40, iapdopt=ia_pd_opts)
 180                  )
 181             self.pg0.add_stream([p])
 182             self.pg_start()
 183
 184             ev = self.vapi.wait_for_event(1, "dhcp6_pd_reply_event")
 185
 186             self.assert_equal(ev.preference, 7)
 187             self.assert_equal(ev.status_code, 1)
 188             self.assert_equal(ev.T1, 20)
 189             self.assert_equal(ev.T2, 40)
 190
 191             reported_prefix = ev.prefixes[0]
 192             prefix = inet_pton(AF_INET6, ia_pd_opts.getfieldval("prefix"))
 193             self.assert_equal(reported_prefix.prefix, prefix)
 194             self.assert_equal(reported_prefix.prefix_length,
 195                               ia_pd_opts.getfieldval("plen"))
 196             self.assert_equal(reported_prefix.preferred_time,
 197                               ia_pd_opts.getfieldval("preflft"))
 198             self.assert_equal(reported_prefix.valid_time,
 199                               ia_pd_opts.getfieldval("validlft"))
 200
 201         finally:
 202             self.vapi.want_dhcp6_pd_reply_events(enable_disable=0)
 203
 204
 205 class TestDHCPv6IANAControlPlane(VppTestCase):
 206     """ DHCPv6 IA NA Control Plane Test Case """
 207
 208     @classmethod
 209     def setUpClass(cls):
 210         super(TestDHCPv6IANAControlPlane, cls).setUpClass()
 211
 212     @classmethod
 213     def tearDownClass(cls):
 214         super(TestDHCPv6IANAControlPlane, cls).tearDownClass()
 215
 216     def setUp(self):
 217         super(TestDHCPv6IANAControlPlane, self).setUp()
 218
 219         self.create_pg_interfaces(range(1))
 220         self.interfaces = list(self.pg_interfaces)
 221         for i in self.interfaces:
 222             i.admin_up()
 223
 224         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 225         self.client_duid = None
 226         self.T1 = 1
 227         self.T2 = 2
 228
 229         fib = self.vapi.ip_route_dump(0, True)
 230         self.initial_addresses = set(self.get_interface_addresses(fib,
 231                                                                   self.pg0))
 232
 233         self.pg_enable_capture(self.pg_interfaces)
 234         self.pg_start()
 235
 236         self.vapi.dhcp6_client_enable_disable(self.pg0.sw_if_index)
 237
 238     def tearDown(self):
 239         self.vapi.dhcp6_client_enable_disable(self.pg0.sw_if_index, enable=0)
 240
 241         for i in self.interfaces:
 242             i.admin_down()
 243
 244         super(TestDHCPv6IANAControlPlane, self).tearDown()
 245
 246     @staticmethod
 247     def get_interface_addresses(fib, pg):
 248         lst = []
 249         for entry in fib:
 250             if entry.route.prefix.prefixlen == 128:
 251                 path = entry.route.paths[0]
 252                 if path.sw_if_index == pg.sw_if_index:
 253                     lst.append(str(entry.route.prefix.network_address))
 254         return lst
 255
 256     def get_addresses(self):
 257         fib = self.vapi.ip_route_dump(0, True)
 258         addresses = set(self.get_interface_addresses(fib, self.pg0))
 259         return addresses.difference(self.initial_addresses)
 260
 261     def validate_duid_ll(self, duid):
 262         DUID_LL(duid)
 263
 264     def validate_packet(self, packet, msg_type, is_resend=False):
 265         try:
 266             self.assertEqual(packet.haslayer(msg_type), 1)
 267             client_duid = packet[DHCP6OptClientId].duid
 268             if self.client_duid is None:
 269                 self.client_duid = client_duid
 270                 self.validate_duid_ll(client_duid)
 271             else:
 272                 self.assertEqual(self.client_duid, client_duid)
 273             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 274                 server_duid = packet[DHCP6OptServerId].duid
 275                 self.assertEqual(server_duid, self.server_duid)
 276             if is_resend:
 277                 self.assertEqual(self.trid, packet[msg_type].trid)
 278             else:
 279                 self.trid = packet[msg_type].trid
 280             ip = packet[IPv6]
 281             udp = packet[UDP]
 282             self.assertEqual(ip.dst, 'ff02::1:2')
 283             self.assertEqual(udp.sport, 546)
 284             self.assertEqual(udp.dport, 547)
 285             dhcpv6 = packet[msg_type]
 286             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 287             if (is_resend):
 288                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 289             else:
 290                 self.assertEqual(elapsed_time.elapsedtime, 0)
 291         except:
 292             packet.show()
 293             raise
 294
 295     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 296         if timeout is None:
 297             timeout = 3
 298         rx_list = self.pg0.get_capture(1, timeout=timeout)
 299         packet = rx_list[0]
 300         self.validate_packet(packet, msg_type, is_resend=is_resend)
 301
 302     def wait_for_solicit(self, timeout=None, is_resend=False):
 303         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 304
 305     def wait_for_request(self, timeout=None, is_resend=False):
 306         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 307
 308     def wait_for_renew(self, timeout=None, is_resend=False):
 309         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 310
 311     def wait_for_rebind(self, timeout=None, is_resend=False):
 312         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 313
 314     def wait_for_release(self, timeout=None, is_resend=False):
 315         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 316
 317     def send_packet(self, msg_type, t1=None, t2=None, ianaopts=None):
 318         if t1 is None:
 319             t1 = self.T1
 320         if t2 is None:
 321             t2 = self.T2
 322         if ianaopts is None:
 323             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2)
 324         else:
 325             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2, ianaopts=ianaopts)
 326         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 327              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 328                   dst=self.pg0.local_ip6_ll) /
 329              UDP(sport=547, dport=546) /
 330              msg_type(trid=self.trid) /
 331              DHCP6OptServerId(duid=self.server_duid) /
 332              DHCP6OptClientId(duid=self.client_duid) /
 333              opt_ia_na
 334              )
 335         self.pg0.add_stream([p])
 336         self.pg_enable_capture(self.pg_interfaces)
 337         self.pg_start()
 338
 339     def send_advertise(self, t1=None, t2=None, ianaopts=None):
 340         self.send_packet(DHCP6_Advertise, t1, t2, ianaopts)
 341
 342     def send_reply(self, t1=None, t2=None, ianaopts=None):
 343         self.send_packet(DHCP6_Reply, t1, t2, ianaopts)
 344
 345     def test_T1_and_T2_timeouts(self):
 346         """ Test T1 and T2 timeouts """
 347
 348         self.wait_for_solicit()
 349         self.send_advertise()
 350         self.wait_for_request()
 351         self.send_reply()
 352
 353         self.sleep(1)
 354
 355         self.wait_for_renew()
 356
 357         self.pg_enable_capture(self.pg_interfaces)
 358
 359         self.sleep(1)
 360
 361         self.wait_for_rebind()
 362
 363     def test_addresses(self):
 364         """ Test handling of addresses """
 365
 366         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=1,
 367                                        validlft=2)
 368
 369         self.wait_for_solicit()
 370         self.send_advertise(t1=20, t2=40, ianaopts=ia_na_opts)
 371         self.wait_for_request()
 372         self.send_reply(t1=20, t2=40, ianaopts=ia_na_opts)
 373         self.sleep(0.1)
 374
 375         # check FIB for new address
 376         new_addresses = self.get_addresses()
 377         self.assertEqual(len(new_addresses), 1)
 378         addr = list(new_addresses)[0]
 379         self.assertEqual(addr, '7:8::2')
 380
 381         self.sleep(2)
 382
 383         # check that the address is deleted
 384         fib = self.vapi.ip_route_dump(0, True)
 385         addresses = set(self.get_interface_addresses(fib, self.pg0))
 386         new_addresses = addresses.difference(self.initial_addresses)
 387         self.assertEqual(len(new_addresses), 0)
 388
 389     def test_sending_client_messages_solicit(self):
 390         """ VPP receives messages from DHCPv6 client """
 391
 392         self.wait_for_solicit()
 393         self.send_packet(DHCP6_Solicit)
 394         self.send_packet(DHCP6_Request)
 395         self.send_packet(DHCP6_Renew)
 396         self.send_packet(DHCP6_Rebind)
 397         self.sleep(1)
 398         self.wait_for_solicit(is_resend=True)
 399
 400     def test_sending_inappropriate_packets(self):
 401         """ Server sends messages with inappropriate message types """
 402
 403         self.wait_for_solicit()
 404         self.send_reply()
 405         self.wait_for_solicit(is_resend=True)
 406         self.send_advertise()
 407         self.wait_for_request()
 408         self.send_advertise()
 409         self.wait_for_request(is_resend=True)
 410         self.send_reply()
 411         self.wait_for_renew()
 412
 413     def test_no_address_available_in_advertise(self):
 414         """ Advertise message contains NoAddrsAvail status code """
 415
 416         self.wait_for_solicit()
 417         noavail = DHCP6OptStatusCode(statuscode=2)  # NoAddrsAvail
 418         self.send_advertise(ianaopts=noavail)
 419         self.wait_for_solicit(is_resend=True)
 420
 421     def test_preferred_greater_than_valid_lifetime(self):
 422         """ Preferred lifetime is greater than valid lifetime """
 423
 424         self.wait_for_solicit()
 425         self.send_advertise()
 426         self.wait_for_request()
 427         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=3)
 428         self.send_reply(ianaopts=ia_na_opts)
 429
 430         self.sleep(0.5)
 431
 432         # check FIB contains no addresses
 433         fib = self.vapi.ip_route_dump(0, True)
 434         addresses = set(self.get_interface_addresses(fib, self.pg0))
 435         new_addresses = addresses.difference(self.initial_addresses)
 436         self.assertEqual(len(new_addresses), 0)
 437
 438     def test_T1_greater_than_T2(self):
 439         """ T1 is greater than T2 """
 440
 441         self.wait_for_solicit()
 442         self.send_advertise()
 443         self.wait_for_request()
 444         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=8)
 445         self.send_reply(t1=80, t2=40, ianaopts=ia_na_opts)
 446
 447         self.sleep(0.5)
 448
 449         # check FIB contains no addresses
 450         fib = self.vapi.ip_route_dump(0, True)
 451         addresses = set(self.get_interface_addresses(fib, self.pg0))
 452         new_addresses = addresses.difference(self.initial_addresses)
 453         self.assertEqual(len(new_addresses), 0)
 454
 455
 456 class TestDHCPv6PDControlPlane(VppTestCase):
 457     """ DHCPv6 PD Control Plane Test Case """
 458
 459     @classmethod
 460     def setUpClass(cls):
 461         super(TestDHCPv6PDControlPlane, cls).setUpClass()
 462
 463     @classmethod
 464     def tearDownClass(cls):
 465         super(TestDHCPv6PDControlPlane, cls).tearDownClass()
 466
 467     def setUp(self):
 468         super(TestDHCPv6PDControlPlane, self).setUp()
 469
 470         self.create_pg_interfaces(range(2))
 471         self.interfaces = list(self.pg_interfaces)
 472         for i in self.interfaces:
 473             i.admin_up()
 474
 475         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 476         self.client_duid = None
 477         self.T1 = 1
 478         self.T2 = 2
 479
 480         fib = self.vapi.ip_route_dump(0, True)
 481         self.initial_addresses = set(self.get_interface_addresses(fib,
 482                                                                   self.pg1))
 483
 484         self.pg_enable_capture(self.pg_interfaces)
 485         self.pg_start()
 486
 487         self.prefix_group = 'my-pd-prefix-group'
 488
 489         self.vapi.dhcp6_pd_client_enable_disable(
 490             self.pg0.sw_if_index,
 491             prefix_group=self.prefix_group)
 492
 493     def tearDown(self):
 494         self.vapi.dhcp6_pd_client_enable_disable(self.pg0.sw_if_index,
 495                                                  enable=0)
 496
 497         for i in self.interfaces:
 498             i.admin_down()
 499
 500         super(TestDHCPv6PDControlPlane, self).tearDown()
 501
 502     @staticmethod
 503     def get_interface_addresses(fib, pg):
 504         lst = []
 505         for entry in fib:
 506             if entry.route.prefix.prefixlen == 128:
 507                 path = entry.route.paths[0]
 508                 if path.sw_if_index == pg.sw_if_index:
 509                     lst.append(str(entry.route.prefix.network_address))
 510         return lst
 511
 512     def get_addresses(self):
 513         fib = self.vapi.ip_route_dump(0, True)
 514         addresses = set(self.get_interface_addresses(fib, self.pg1))
 515         return addresses.difference(self.initial_addresses)
 516
 517     def validate_duid_ll(self, duid):
 518         DUID_LL(duid)
 519
 520     def validate_packet(self, packet, msg_type, is_resend=False):
 521         try:
 522             self.assertEqual(packet.haslayer(msg_type), 1)
 523             client_duid = packet[DHCP6OptClientId].duid
 524             if self.client_duid is None:
 525                 self.client_duid = client_duid
 526                 self.validate_duid_ll(client_duid)
 527             else:
 528                 self.assertEqual(self.client_duid, client_duid)
 529             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 530                 server_duid = packet[DHCP6OptServerId].duid
 531                 self.assertEqual(server_duid, self.server_duid)
 532             if is_resend:
 533                 self.assertEqual(self.trid, packet[msg_type].trid)
 534             else:
 535                 self.trid = packet[msg_type].trid
 536             ip = packet[IPv6]
 537             udp = packet[UDP]
 538             self.assertEqual(ip.dst, 'ff02::1:2')
 539             self.assertEqual(udp.sport, 546)
 540             self.assertEqual(udp.dport, 547)
 541             dhcpv6 = packet[msg_type]
 542             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 543             if (is_resend):
 544                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 545             else:
 546                 self.assertEqual(elapsed_time.elapsedtime, 0)
 547         except:
 548             packet.show()
 549             raise
 550
 551     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 552         if timeout is None:
 553             timeout = 3
 554         rx_list = self.pg0.get_capture(1, timeout=timeout)
 555         packet = rx_list[0]
 556         self.validate_packet(packet, msg_type, is_resend=is_resend)
 557
 558     def wait_for_solicit(self, timeout=None, is_resend=False):
 559         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 560
 561     def wait_for_request(self, timeout=None, is_resend=False):
 562         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 563
 564     def wait_for_renew(self, timeout=None, is_resend=False):
 565         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 566
 567     def wait_for_rebind(self, timeout=None, is_resend=False):
 568         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 569
 570     def wait_for_release(self, timeout=None, is_resend=False):
 571         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 572
 573     def send_packet(self, msg_type, t1=None, t2=None, iapdopt=None):
 574         if t1 is None:
 575             t1 = self.T1
 576         if t2 is None:
 577             t2 = self.T2
 578         if iapdopt is None:
 579             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2)
 580         else:
 581             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2, iapdopt=iapdopt)
 582         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 583              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 584                   dst=self.pg0.local_ip6_ll) /
 585              UDP(sport=547, dport=546) /
 586              msg_type(trid=self.trid) /
 587              DHCP6OptServerId(duid=self.server_duid) /
 588              DHCP6OptClientId(duid=self.client_duid) /
 589              opt_ia_pd
 590              )
 591         self.pg0.add_stream([p])
 592         self.pg_enable_capture(self.pg_interfaces)
 593         self.pg_start()
 594
 595     def send_advertise(self, t1=None, t2=None, iapdopt=None):
 596         self.send_packet(DHCP6_Advertise, t1, t2, iapdopt)
 597
 598     def send_reply(self, t1=None, t2=None, iapdopt=None):
 599         self.send_packet(DHCP6_Reply, t1, t2, iapdopt)
 600
 601     def test_T1_and_T2_timeouts(self):
 602         """ Test T1 and T2 timeouts """
 603
 604         self.wait_for_solicit()
 605         self.send_advertise()
 606         self.wait_for_request()
 607         self.send_reply()
 608
 609         self.sleep(1)
 610
 611         self.wait_for_renew()
 612
 613         self.pg_enable_capture(self.pg_interfaces)
 614
 615         self.sleep(1)
 616
 617         self.wait_for_rebind()
 618
 619     def test_prefixes(self):
 620         """ Test handling of prefixes """
 621
 622         address_bin_1 = None
 623         address_bin_2 = None
 624         try:
 625             address_bin_1 = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 626             address_prefix_length_1 = 60
 627             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 628                                                        address_bin_1,
 629                                                        address_prefix_length_1,
 630                                                        self.prefix_group)
 631
 632             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=2,
 633                                           validlft=3)
 634
 635             self.wait_for_solicit()
 636             self.send_advertise(t1=20, t2=40, iapdopt=ia_pd_opts)
 637             self.wait_for_request()
 638             self.send_reply(t1=20, t2=40, iapdopt=ia_pd_opts)
 639             self.sleep(0.1)
 640
 641             # check FIB for new address
 642             new_addresses = self.get_addresses()
 643             self.assertEqual(len(new_addresses), 1)
 644             addr = list(new_addresses)[0]
 645             self.assertEqual(addr, '7:8:0:2::405')
 646
 647             self.sleep(1)
 648
 649             address_bin_2 = '\x00' * 6 + '\x00\x76' + '\x00' * 6 + '\x04\x06'
 650             address_prefix_length_2 = 62
 651             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 652                                                        address_bin_2,
 653                                                        address_prefix_length_2,
 654                                                        self.prefix_group)
 655
 656             self.sleep(1)
 657
 658             # check FIB contains 2 addresses
 659             fib = self.vapi.ip_route_dump(0, True)
 660             addresses = set(self.get_interface_addresses(fib, self.pg1))
 661             new_addresses = addresses.difference(self.initial_addresses)
 662             self.assertEqual(len(new_addresses), 2)
 663             addr1 = list(new_addresses)[0]
 664             addr2 = list(new_addresses)[1]
 665             if addr1 == '7:8:0:76::406':
 666                 addr1, addr2 = addr2, addr1
 667             self.assertEqual(addr1, '7:8:0:2::405')
 668             self.assertEqual(addr2, '7:8:0:76::406')
 669
 670             self.sleep(1)
 671
 672             # check that the addresses are deleted
 673             fib = self.vapi.ip_route_dump(0, True)
 674             addresses = set(self.get_interface_addresses(fib, self.pg1))
 675             new_addresses = addresses.difference(self.initial_addresses)
 676             self.assertEqual(len(new_addresses), 0)
 677
 678         finally:
 679             if address_bin_1 is not None:
 680                 self.vapi.ip6_add_del_address_using_prefix(
 681                     self.pg1.sw_if_index, address_bin_1,
 682                     address_prefix_length_1, self.prefix_group, is_add=0)
 683             if address_bin_2 is not None:
 684                 self.vapi.ip6_add_del_address_using_prefix(
 685                     self.pg1.sw_if_index, address_bin_2,
 686                     address_prefix_length_2, self.prefix_group, is_add=0)
 687
 688     def test_sending_client_messages_solicit(self):
 689         """ VPP receives messages from DHCPv6 client """
 690
 691         self.wait_for_solicit()
 692         self.send_packet(DHCP6_Solicit)
 693         self.send_packet(DHCP6_Request)
 694         self.send_packet(DHCP6_Renew)
 695         self.send_packet(DHCP6_Rebind)
 696         self.sleep(1)
 697         self.wait_for_solicit(is_resend=True)
 698
 699     def test_sending_inappropriate_packets(self):
 700         """ Server sends messages with inappropriate message types """
 701
 702         self.wait_for_solicit()
 703         self.send_reply()
 704         self.wait_for_solicit(is_resend=True)
 705         self.send_advertise()
 706         self.wait_for_request()
 707         self.send_advertise()
 708         self.wait_for_request(is_resend=True)
 709         self.send_reply()
 710         self.wait_for_renew()
 711
 712     def test_no_prefix_available_in_advertise(self):
 713         """ Advertise message contains NoPrefixAvail status code """
 714
 715         self.wait_for_solicit()
 716         noavail = DHCP6OptStatusCode(statuscode=6)  # NoPrefixAvail
 717         self.send_advertise(iapdopt=noavail)
 718         self.wait_for_solicit(is_resend=True)
 719
 720     def test_preferred_greater_than_valid_lifetime(self):
 721         """ Preferred lifetime is greater than valid lifetime """
 722
 723         try:
 724             address_bin = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 725             address_prefix_length = 60
 726             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 727                                                        address_bin,
 728                                                        address_prefix_length,
 729                                                        self.prefix_group)
 730
 731             self.wait_for_solicit()
 732             self.send_advertise()
 733             self.wait_for_request()
 734             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 735                                           validlft=3)
 736             self.send_reply(iapdopt=ia_pd_opts)
 737
 738             self.sleep(0.5)
 739
 740             # check FIB contains no addresses
 741             fib = self.vapi.ip_route_dump(0, True)
 742             addresses = set(self.get_interface_addresses(fib, self.pg1))
 743             new_addresses = addresses.difference(self.initial_addresses)
 744             self.assertEqual(len(new_addresses), 0)
 745
 746         finally:
 747             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 748                                                        address_bin,
 749                                                        address_prefix_length,
 750                                                        self.prefix_group,
 751                                                        is_add=0)
 752
 753     def test_T1_greater_than_T2(self):
 754         """ T1 is greater than T2 """
 755
 756         try:
 757             address_bin = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 758             address_prefix_length = 60
 759             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 760                                                        address_bin,
 761                                                        address_prefix_length,
 762                                                        self.prefix_group)
 763
 764             self.wait_for_solicit()
 765             self.send_advertise()
 766             self.wait_for_request()
 767             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 768                                           validlft=8)
 769             self.send_reply(t1=80, t2=40, iapdopt=ia_pd_opts)
 770
 771             self.sleep(0.5)
 772
 773             # check FIB contains no addresses
 774             fib = self.vapi.ip_route_dump(0, True)
 775             addresses = set(self.get_interface_addresses(fib, self.pg1))
 776             new_addresses = addresses.difference(self.initial_addresses)
 777             self.assertEqual(len(new_addresses), 0)
 778
 779         finally:
 780             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 781                                                        address_bin,
 782                                                        address_prefix_length,
 783                                                        self.prefix_group,
 784                                                        is_add=0)