test/test_dhcp6.py

   1 from scapy.layers.dhcp6 import DHCP6_Advertise, DHCP6OptClientId, \
   2     DHCP6OptStatusCode, DHCP6OptPref, DHCP6OptIA_PD, DHCP6OptIAPrefix, \
   3     DHCP6OptServerId, DHCP6_Solicit, DHCP6_Reply, DHCP6_Request, DHCP6_Renew, \
   4     DHCP6_Rebind, DUID_LL, DHCP6_Release, DHCP6OptElapsedTime, DHCP6OptIA_NA, \
   5     DHCP6OptIAAddress
   6 from scapy.layers.inet6 import IPv6, Ether, UDP
   7 from scapy.utils6 import in6_mactoifaceid
   8 from scapy.utils import inet_ntop, inet_pton
   9 from socket import AF_INET6
  10 from framework import VppTestCase
  11
  12
  13 def ip6_normalize(ip6):
  14     return inet_ntop(AF_INET6, inet_pton(AF_INET6, ip6))
  15
  16
  17 def mk_ll_addr(mac):
  18     euid = in6_mactoifaceid(mac)
  19     addr = "fe80::" + euid
  20     return addr
  21
  22
  23 class TestDHCPv6DataPlane(VppTestCase):
  24     """ DHCPv6 Data Plane Test Case """
  25
  26     @classmethod
  27     def setUpClass(cls):
  28         super(TestDHCPv6DataPlane, cls).setUpClass()
  29
  30     def setUp(self):
  31         super(TestDHCPv6DataPlane, self).setUp()
  32
  33         self.create_pg_interfaces(range(1))
  34         self.interfaces = list(self.pg_interfaces)
  35         for i in self.interfaces:
  36             i.admin_up()
  37             i.config_ip6()
  38
  39         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
  40
  41     def tearDown(self):
  42         for i in self.interfaces:
  43             i.unconfig_ip6()
  44             i.admin_down()
  45         super(TestDHCPv6DataPlane, self).tearDown()
  46
  47     def test_dhcp_ia_na_send_solicit_receive_advertise(self):
  48         """ Verify DHCPv6 IA NA Solicit packet and Advertise envent """
  49
  50         self.vapi.dhcp6_clients_enable_disable()
  51
  52         self.pg_enable_capture(self.pg_interfaces)
  53         self.pg_start()
  54         address_bin = '\00\01\00\02\00\03' + '\00' * 8 + '\00\05'
  55         address = {'address': address_bin,
  56                    'preferred_time': 60,
  57                    'valid_time': 120}
  58         self.vapi.dhcp6_send_client_message(1, self.pg0.sw_if_index,
  59                                             T1=20, T2=40, addresses=[address])
  60         rx_list = self.pg0.get_capture(1)
  61         self.assertEqual(len(rx_list), 1)
  62         packet = rx_list[0]
  63
  64         self.assertTrue(packet.haslayer(IPv6))
  65         self.assertTrue(packet[IPv6].haslayer(DHCP6_Solicit))
  66
  67         client_duid = packet[DHCP6OptClientId].duid
  68         trid = packet[DHCP6_Solicit].trid
  69
  70         dst = ip6_normalize(packet[IPv6].dst)
  71         dst2 = ip6_normalize("ff02::1:2")
  72         self.assert_equal(dst, dst2)
  73         src = ip6_normalize(packet[IPv6].src)
  74         src2 = ip6_normalize(self.pg0.local_ip6_ll)
  75         self.assert_equal(src, src2)
  76         ia_na = packet[DHCP6OptIA_NA]
  77         self.assert_equal(ia_na.T1, 20)
  78         self.assert_equal(ia_na.T2, 40)
  79         self.assert_equal(len(ia_na.ianaopts), 1)
  80         address = ia_na.ianaopts[0]
  81         self.assert_equal(address.addr, '1:2:3::5')
  82         self.assert_equal(address.preflft, 60)
  83         self.assert_equal(address.validlft, 120)
  84
  85         self.vapi.want_dhcp6_reply_events()
  86
  87         try:
  88             ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=60,
  89                                            validlft=120)
  90             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  91                  IPv6(src=mk_ll_addr(self.pg0.remote_mac),
  92                       dst=self.pg0.local_ip6_ll) /
  93                  UDP(sport=547, dport=546) /
  94                  DHCP6_Advertise(trid=trid) /
  95                  DHCP6OptServerId(duid=self.server_duid) /
  96                  DHCP6OptClientId(duid=client_duid) /
  97                  DHCP6OptPref(prefval=7) /
  98                  DHCP6OptStatusCode(statuscode=1) /
  99                  DHCP6OptIA_NA(iaid=1, T1=20, T2=40, ianaopts=ia_na_opts)
 100                  )
 101             self.pg0.add_stream([p])
 102             self.pg_start()
 103
 104             ev = self.vapi.wait_for_event(1, "dhcp6_reply_event")
 105
 106             self.assert_equal(ev.preference, 7)
 107             self.assert_equal(ev.status_code, 1)
 108             self.assert_equal(ev.T1, 20)
 109             self.assert_equal(ev.T2, 40)
 110
 111             reported_address = ev.addresses[0]
 112             address = inet_pton(AF_INET6, ia_na_opts.getfieldval("addr"))
 113             self.assert_equal(reported_address.address, address)
 114             self.assert_equal(reported_address.preferred_time,
 115                               ia_na_opts.getfieldval("preflft"))
 116             self.assert_equal(reported_address.valid_time,
 117                               ia_na_opts.getfieldval("validlft"))
 118
 119         finally:
 120             self.vapi.want_dhcp6_reply_events(enable_disable=0)
 121
 122     def test_dhcp_pd_send_solicit_receive_advertise(self):
 123         """ Verify DHCPv6 PD Solicit packet and Advertise envent """
 124
 125         self.vapi.dhcp6_clients_enable_disable()
 126
 127         self.pg_enable_capture(self.pg_interfaces)
 128         self.pg_start()
 129         prefix_bin = '\00\01\00\02\00\03' + '\00' * 10
 130         prefix = {'prefix': prefix_bin,
 131                   'prefix_length': 50,
 132                   'preferred_time': 60,
 133                   'valid_time': 120}
 134         self.vapi.dhcp6_pd_send_client_message(1, self.pg0.sw_if_index,
 135                                                T1=20, T2=40, prefixes=[prefix])
 136         rx_list = self.pg0.get_capture(1)
 137         self.assertEqual(len(rx_list), 1)
 138         packet = rx_list[0]
 139
 140         self.assertTrue(packet.haslayer(IPv6))
 141         self.assertTrue(packet[IPv6].haslayer(DHCP6_Solicit))
 142
 143         client_duid = packet[DHCP6OptClientId].duid
 144         trid = packet[DHCP6_Solicit].trid
 145
 146         dst = ip6_normalize(packet[IPv6].dst)
 147         dst2 = ip6_normalize("ff02::1:2")
 148         self.assert_equal(dst, dst2)
 149         src = ip6_normalize(packet[IPv6].src)
 150         src2 = ip6_normalize(self.pg0.local_ip6_ll)
 151         self.assert_equal(src, src2)
 152         ia_pd = packet[DHCP6OptIA_PD]
 153         self.assert_equal(ia_pd.T1, 20)
 154         self.assert_equal(ia_pd.T2, 40)
 155         self.assert_equal(len(ia_pd.iapdopt), 1)
 156         prefix = ia_pd.iapdopt[0]
 157         self.assert_equal(prefix.prefix, '1:2:3::')
 158         self.assert_equal(prefix.plen, 50)
 159         self.assert_equal(prefix.preflft, 60)
 160         self.assert_equal(prefix.validlft, 120)
 161
 162         self.vapi.want_dhcp6_pd_reply_events()
 163
 164         try:
 165             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=60,
 166                                           validlft=120)
 167             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 168                  IPv6(src=mk_ll_addr(self.pg0.remote_mac),
 169                       dst=self.pg0.local_ip6_ll) /
 170                  UDP(sport=547, dport=546) /
 171                  DHCP6_Advertise(trid=trid) /
 172                  DHCP6OptServerId(duid=self.server_duid) /
 173                  DHCP6OptClientId(duid=client_duid) /
 174                  DHCP6OptPref(prefval=7) /
 175                  DHCP6OptStatusCode(statuscode=1) /
 176                  DHCP6OptIA_PD(iaid=1, T1=20, T2=40, iapdopt=ia_pd_opts)
 177                  )
 178             self.pg0.add_stream([p])
 179             self.pg_start()
 180
 181             ev = self.vapi.wait_for_event(1, "dhcp6_pd_reply_event")
 182
 183             self.assert_equal(ev.preference, 7)
 184             self.assert_equal(ev.status_code, 1)
 185             self.assert_equal(ev.T1, 20)
 186             self.assert_equal(ev.T2, 40)
 187
 188             reported_prefix = ev.prefixes[0]
 189             prefix = inet_pton(AF_INET6, ia_pd_opts.getfieldval("prefix"))
 190             self.assert_equal(reported_prefix.prefix, prefix)
 191             self.assert_equal(reported_prefix.prefix_length,
 192                               ia_pd_opts.getfieldval("plen"))
 193             self.assert_equal(reported_prefix.preferred_time,
 194                               ia_pd_opts.getfieldval("preflft"))
 195             self.assert_equal(reported_prefix.valid_time,
 196                               ia_pd_opts.getfieldval("validlft"))
 197
 198         finally:
 199             self.vapi.want_dhcp6_pd_reply_events(enable_disable=0)
 200
 201
 202 class TestDHCPv6IANAControlPlane(VppTestCase):
 203     """ DHCPv6 IA NA Control Plane Test Case """
 204
 205     @classmethod
 206     def setUpClass(cls):
 207         super(TestDHCPv6IANAControlPlane, cls).setUpClass()
 208
 209     def setUp(self):
 210         super(TestDHCPv6IANAControlPlane, self).setUp()
 211
 212         self.create_pg_interfaces(range(1))
 213         self.interfaces = list(self.pg_interfaces)
 214         for i in self.interfaces:
 215             i.admin_up()
 216
 217         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 218         self.client_duid = None
 219         self.T1 = 1
 220         self.T2 = 2
 221
 222         fib = self.vapi.ip6_fib_dump()
 223         self.initial_addresses = set(self.get_interface_addresses(fib,
 224                                                                   self.pg0))
 225
 226         self.pg_enable_capture(self.pg_interfaces)
 227         self.pg_start()
 228
 229         self.vapi.dhcp6_client_enable_disable(self.pg0.sw_if_index)
 230
 231     def tearDown(self):
 232         self.vapi.dhcp6_client_enable_disable(self.pg0.sw_if_index, enable=0)
 233
 234         for i in self.interfaces:
 235             i.admin_down()
 236
 237         super(TestDHCPv6IANAControlPlane, self).tearDown()
 238
 239     @staticmethod
 240     def get_interface_addresses(fib, pg):
 241         lst = []
 242         for entry in fib:
 243             if entry.address_length == 128:
 244                 path = entry.path[0]
 245                 if path.sw_if_index == pg.sw_if_index:
 246                     lst.append(entry.address)
 247         return lst
 248
 249     def get_addresses(self):
 250         fib = self.vapi.ip6_fib_dump()
 251         addresses = set(self.get_interface_addresses(fib, self.pg0))
 252         return addresses.difference(self.initial_addresses)
 253
 254     def validate_duid_ll(self, duid):
 255         DUID_LL(duid)
 256
 257     def validate_packet(self, packet, msg_type, is_resend=False):
 258         try:
 259             self.assertTrue(packet.haslayer(msg_type))
 260             client_duid = packet[DHCP6OptClientId].duid
 261             if self.client_duid is None:
 262                 self.client_duid = client_duid
 263                 self.validate_duid_ll(client_duid)
 264             else:
 265                 self.assertEqual(self.client_duid, client_duid)
 266             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 267                 server_duid = packet[DHCP6OptServerId].duid
 268                 self.assertEqual(server_duid, self.server_duid)
 269             if is_resend:
 270                 self.assertEqual(self.trid, packet[msg_type].trid)
 271             else:
 272                 self.trid = packet[msg_type].trid
 273             ip = packet[IPv6]
 274             udp = packet[UDP]
 275             self.assertEqual(ip.dst, 'ff02::1:2')
 276             self.assertEqual(udp.sport, 546)
 277             self.assertEqual(udp.dport, 547)
 278             dhcpv6 = packet[msg_type]
 279             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 280             if (is_resend):
 281                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 282             else:
 283                 self.assertEqual(elapsed_time.elapsedtime, 0)
 284         except:
 285             packet.show()
 286             raise
 287
 288     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 289         if timeout is None:
 290             timeout = 3
 291         rx_list = self.pg0.get_capture(1, timeout=timeout)
 292         packet = rx_list[0]
 293         self.validate_packet(packet, msg_type, is_resend=is_resend)
 294
 295     def wait_for_solicit(self, timeout=None, is_resend=False):
 296         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 297
 298     def wait_for_request(self, timeout=None, is_resend=False):
 299         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 300
 301     def wait_for_renew(self, timeout=None, is_resend=False):
 302         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 303
 304     def wait_for_rebind(self, timeout=None, is_resend=False):
 305         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 306
 307     def wait_for_release(self, timeout=None, is_resend=False):
 308         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 309
 310     def send_packet(self, msg_type, t1=None, t2=None, ianaopts=None):
 311         if t1 is None:
 312             t1 = self.T1
 313         if t2 is None:
 314             t2 = self.T2
 315         if ianaopts is None:
 316             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2)
 317         else:
 318             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2, ianaopts=ianaopts)
 319         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 320              IPv6(src=mk_ll_addr(self.pg0.remote_mac),
 321                   dst=self.pg0.local_ip6_ll) /
 322              UDP(sport=547, dport=546) /
 323              msg_type(trid=self.trid) /
 324              DHCP6OptServerId(duid=self.server_duid) /
 325              DHCP6OptClientId(duid=self.client_duid) /
 326              opt_ia_na
 327              )
 328         self.pg0.add_stream([p])
 329         self.pg_enable_capture(self.pg_interfaces)
 330         self.pg_start()
 331
 332     def send_advertise(self, t1=None, t2=None, ianaopts=None):
 333         self.send_packet(DHCP6_Advertise, t1, t2, ianaopts)
 334
 335     def send_reply(self, t1=None, t2=None, ianaopts=None):
 336         self.send_packet(DHCP6_Reply, t1, t2, ianaopts)
 337
 338     def test_T1_and_T2_timeouts(self):
 339         """ Test T1 and T2 timeouts """
 340
 341         self.wait_for_solicit()
 342         self.send_advertise()
 343         self.wait_for_request()
 344         self.send_reply()
 345
 346         self.sleep(1)
 347
 348         self.wait_for_renew()
 349
 350         self.pg_enable_capture(self.pg_interfaces)
 351
 352         self.sleep(1)
 353
 354         self.wait_for_rebind()
 355
 356     def test_addresses(self):
 357         """ Test handling of addresses """
 358
 359         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=1,
 360                                        validlft=2)
 361
 362         self.wait_for_solicit()
 363         self.send_advertise(t1=20, t2=40, ianaopts=ia_na_opts)
 364         self.wait_for_request()
 365         self.send_reply(t1=20, t2=40, ianaopts=ia_na_opts)
 366         self.sleep(0.1)
 367
 368         # check FIB for new address
 369         new_addresses = self.get_addresses()
 370         self.assertEqual(len(new_addresses), 1)
 371         addr = list(new_addresses)[0]
 372         self.assertEqual(inet_ntop(AF_INET6, addr), '7:8::2')
 373
 374         self.sleep(2)
 375
 376         # check that the address is deleted
 377         fib = self.vapi.ip6_fib_dump()
 378         addresses = set(self.get_interface_addresses(fib, self.pg0))
 379         new_addresses = addresses.difference(self.initial_addresses)
 380         self.assertEqual(len(new_addresses), 0)
 381
 382     def test_sending_client_messages_solicit(self):
 383         """ VPP receives messages from DHCPv6 client """
 384
 385         self.wait_for_solicit()
 386         self.send_packet(DHCP6_Solicit)
 387         self.send_packet(DHCP6_Request)
 388         self.send_packet(DHCP6_Renew)
 389         self.send_packet(DHCP6_Rebind)
 390         self.sleep(1)
 391         self.wait_for_solicit(is_resend=True)
 392
 393     def test_sending_inappropriate_packets(self):
 394         """ Server sends messages with inappropriate message types """
 395
 396         self.wait_for_solicit()
 397         self.send_reply()
 398         self.wait_for_solicit(is_resend=True)
 399         self.send_advertise()
 400         self.wait_for_request()
 401         self.send_advertise()
 402         self.wait_for_request(is_resend=True)
 403         self.send_reply()
 404         self.wait_for_renew()
 405
 406     def test_no_address_available_in_advertise(self):
 407         """ Advertise message contains NoAddrsAvail status code """
 408
 409         self.wait_for_solicit()
 410         noavail = DHCP6OptStatusCode(statuscode=2)  # NoAddrsAvail
 411         self.send_advertise(ianaopts=noavail)
 412         self.wait_for_solicit(is_resend=True)
 413
 414     def test_preferred_greater_than_valit_lifetime(self):
 415         """ Preferred lifetime is greater than valid lifetime """
 416
 417         self.wait_for_solicit()
 418         self.send_advertise()
 419         self.wait_for_request()
 420         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=3)
 421         self.send_reply(ianaopts=ia_na_opts)
 422
 423         self.sleep(0.5)
 424
 425         # check FIB contains no addresses
 426         fib = self.vapi.ip6_fib_dump()
 427         addresses = set(self.get_interface_addresses(fib, self.pg0))
 428         new_addresses = addresses.difference(self.initial_addresses)
 429         self.assertEqual(len(new_addresses), 0)
 430
 431     def test_T1_greater_than_T2(self):
 432         """ T1 is greater than T2 """
 433
 434         self.wait_for_solicit()
 435         self.send_advertise()
 436         self.wait_for_request()
 437         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=8)
 438         self.send_reply(t1=80, t2=40, ianaopts=ia_na_opts)
 439
 440         self.sleep(0.5)
 441
 442         # check FIB contains no addresses
 443         fib = self.vapi.ip6_fib_dump()
 444         addresses = set(self.get_interface_addresses(fib, self.pg0))
 445         new_addresses = addresses.difference(self.initial_addresses)
 446         self.assertEqual(len(new_addresses), 0)
 447
 448
 449 class TestDHCPv6PDControlPlane(VppTestCase):
 450     """ DHCPv6 PD Control Plane Test Case """
 451
 452     @classmethod
 453     def setUpClass(cls):
 454         super(TestDHCPv6PDControlPlane, cls).setUpClass()
 455
 456     def setUp(self):
 457         super(TestDHCPv6PDControlPlane, self).setUp()
 458
 459         self.create_pg_interfaces(range(2))
 460         self.interfaces = list(self.pg_interfaces)
 461         for i in self.interfaces:
 462             i.admin_up()
 463
 464         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 465         self.client_duid = None
 466         self.T1 = 1
 467         self.T2 = 2
 468
 469         fib = self.vapi.ip6_fib_dump()
 470         self.initial_addresses = set(self.get_interface_addresses(fib,
 471                                                                   self.pg1))
 472
 473         self.pg_enable_capture(self.pg_interfaces)
 474         self.pg_start()
 475
 476         self.prefix_group = 'my-pd-prefix-group'
 477
 478         self.vapi.dhcp6_pd_client_enable_disable(
 479             self.pg0.sw_if_index,
 480             prefix_group=self.prefix_group)
 481
 482     def tearDown(self):
 483         self.vapi.dhcp6_pd_client_enable_disable(self.pg0.sw_if_index,
 484                                                  enable=0)
 485
 486         for i in self.interfaces:
 487             i.admin_down()
 488
 489         super(TestDHCPv6PDControlPlane, self).tearDown()
 490
 491     @staticmethod
 492     def get_interface_addresses(fib, pg):
 493         lst = []
 494         for entry in fib:
 495             if entry.address_length == 128:
 496                 path = entry.path[0]
 497                 if path.sw_if_index == pg.sw_if_index:
 498                     lst.append(entry.address)
 499         return lst
 500
 501     def get_addresses(self):
 502         fib = self.vapi.ip6_fib_dump()
 503         addresses = set(self.get_interface_addresses(fib, self.pg1))
 504         return addresses.difference(self.initial_addresses)
 505
 506     def validate_duid_ll(self, duid):
 507         DUID_LL(duid)
 508
 509     def validate_packet(self, packet, msg_type, is_resend=False):
 510         try:
 511             self.assertTrue(packet.haslayer(msg_type))
 512             client_duid = packet[DHCP6OptClientId].duid
 513             if self.client_duid is None:
 514                 self.client_duid = client_duid
 515                 self.validate_duid_ll(client_duid)
 516             else:
 517                 self.assertEqual(self.client_duid, client_duid)
 518             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 519                 server_duid = packet[DHCP6OptServerId].duid
 520                 self.assertEqual(server_duid, self.server_duid)
 521             if is_resend:
 522                 self.assertEqual(self.trid, packet[msg_type].trid)
 523             else:
 524                 self.trid = packet[msg_type].trid
 525             ip = packet[IPv6]
 526             udp = packet[UDP]
 527             self.assertEqual(ip.dst, 'ff02::1:2')
 528             self.assertEqual(udp.sport, 546)
 529             self.assertEqual(udp.dport, 547)
 530             dhcpv6 = packet[msg_type]
 531             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 532             if (is_resend):
 533                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 534             else:
 535                 self.assertEqual(elapsed_time.elapsedtime, 0)
 536         except:
 537             packet.show()
 538             raise
 539
 540     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 541         if timeout is None:
 542             timeout = 3
 543         rx_list = self.pg0.get_capture(1, timeout=timeout)
 544         packet = rx_list[0]
 545         self.validate_packet(packet, msg_type, is_resend=is_resend)
 546
 547     def wait_for_solicit(self, timeout=None, is_resend=False):
 548         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 549
 550     def wait_for_request(self, timeout=None, is_resend=False):
 551         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 552
 553     def wait_for_renew(self, timeout=None, is_resend=False):
 554         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 555
 556     def wait_for_rebind(self, timeout=None, is_resend=False):
 557         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 558
 559     def wait_for_release(self, timeout=None, is_resend=False):
 560         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 561
 562     def send_packet(self, msg_type, t1=None, t2=None, iapdopt=None):
 563         if t1 is None:
 564             t1 = self.T1
 565         if t2 is None:
 566             t2 = self.T2
 567         if iapdopt is None:
 568             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2)
 569         else:
 570             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2, iapdopt=iapdopt)
 571         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 572              IPv6(src=mk_ll_addr(self.pg0.remote_mac),
 573                   dst=self.pg0.local_ip6_ll) /
 574              UDP(sport=547, dport=546) /
 575              msg_type(trid=self.trid) /
 576              DHCP6OptServerId(duid=self.server_duid) /
 577              DHCP6OptClientId(duid=self.client_duid) /
 578              opt_ia_pd
 579              )
 580         self.pg0.add_stream([p])
 581         self.pg_enable_capture(self.pg_interfaces)
 582         self.pg_start()
 583
 584     def send_advertise(self, t1=None, t2=None, iapdopt=None):
 585         self.send_packet(DHCP6_Advertise, t1, t2, iapdopt)
 586
 587     def send_reply(self, t1=None, t2=None, iapdopt=None):
 588         self.send_packet(DHCP6_Reply, t1, t2, iapdopt)
 589
 590     def test_T1_and_T2_timeouts(self):
 591         """ Test T1 and T2 timeouts """
 592
 593         self.wait_for_solicit()
 594         self.send_advertise()
 595         self.wait_for_request()
 596         self.send_reply()
 597
 598         self.sleep(1)
 599
 600         self.wait_for_renew()
 601
 602         self.pg_enable_capture(self.pg_interfaces)
 603
 604         self.sleep(1)
 605
 606         self.wait_for_rebind()
 607
 608     def test_prefixes(self):
 609         """ Test handling of prefixes """
 610
 611         address_bin_1 = None
 612         address_bin_2 = None
 613         try:
 614             address_bin_1 = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 615             address_prefix_length_1 = 60
 616             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 617                                                        address_bin_1,
 618                                                        address_prefix_length_1,
 619                                                        self.prefix_group)
 620
 621             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=2,
 622                                           validlft=3)
 623
 624             self.wait_for_solicit()
 625             self.send_advertise(t1=20, t2=40, iapdopt=ia_pd_opts)
 626             self.wait_for_request()
 627             self.send_reply(t1=20, t2=40, iapdopt=ia_pd_opts)
 628             self.sleep(0.1)
 629
 630             # check FIB for new address
 631             new_addresses = self.get_addresses()
 632             self.assertEqual(len(new_addresses), 1)
 633             addr = list(new_addresses)[0]
 634             self.assertEqual(inet_ntop(AF_INET6, addr), '7:8:0:2::405')
 635
 636             self.sleep(1)
 637
 638             address_bin_2 = '\x00' * 6 + '\x00\x76' + '\x00' * 6 + '\x04\x06'
 639             address_prefix_length_2 = 62
 640             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 641                                                        address_bin_2,
 642                                                        address_prefix_length_2,
 643                                                        self.prefix_group)
 644
 645             self.sleep(1)
 646
 647             # check FIB contains 2 addresses
 648             fib = self.vapi.ip6_fib_dump()
 649             addresses = set(self.get_interface_addresses(fib, self.pg1))
 650             new_addresses = addresses.difference(self.initial_addresses)
 651             self.assertEqual(len(new_addresses), 2)
 652             addr1 = list(new_addresses)[0]
 653             addr2 = list(new_addresses)[1]
 654             if inet_ntop(AF_INET6, addr1) == '7:8:0:76::406':
 655                 addr1, addr2 = addr2, addr1
 656             self.assertEqual(inet_ntop(AF_INET6, addr1), '7:8:0:2::405')
 657             self.assertEqual(inet_ntop(AF_INET6, addr2), '7:8:0:76::406')
 658
 659             self.sleep(1)
 660
 661             # check that the addresses are deleted
 662             fib = self.vapi.ip6_fib_dump()
 663             addresses = set(self.get_interface_addresses(fib, self.pg1))
 664             new_addresses = addresses.difference(self.initial_addresses)
 665             self.assertEqual(len(new_addresses), 0)
 666
 667         finally:
 668             if address_bin_1 is not None:
 669                 self.vapi.ip6_add_del_address_using_prefix(
 670                     self.pg1.sw_if_index, address_bin_1,
 671                     address_prefix_length_1, self.prefix_group, is_add=0)
 672             if address_bin_2 is not None:
 673                 self.vapi.ip6_add_del_address_using_prefix(
 674                     self.pg1.sw_if_index, address_bin_2,
 675                     address_prefix_length_2, self.prefix_group, is_add=0)
 676
 677     def test_sending_client_messages_solicit(self):
 678         """ VPP receives messages from DHCPv6 client """
 679
 680         self.wait_for_solicit()
 681         self.send_packet(DHCP6_Solicit)
 682         self.send_packet(DHCP6_Request)
 683         self.send_packet(DHCP6_Renew)
 684         self.send_packet(DHCP6_Rebind)
 685         self.sleep(1)
 686         self.wait_for_solicit(is_resend=True)
 687
 688     def test_sending_inappropriate_packets(self):
 689         """ Server sends messages with inappropriate message types """
 690
 691         self.wait_for_solicit()
 692         self.send_reply()
 693         self.wait_for_solicit(is_resend=True)
 694         self.send_advertise()
 695         self.wait_for_request()
 696         self.send_advertise()
 697         self.wait_for_request(is_resend=True)
 698         self.send_reply()
 699         self.wait_for_renew()
 700
 701     def test_no_prefix_available_in_advertise(self):
 702         """ Advertise message contains NoPrefixAvail status code """
 703
 704         self.wait_for_solicit()
 705         noavail = DHCP6OptStatusCode(statuscode=6)  # NoPrefixAvail
 706         self.send_advertise(iapdopt=noavail)
 707         self.wait_for_solicit(is_resend=True)
 708
 709     def test_preferred_greater_than_valit_lifetime(self):
 710         """ Preferred lifetime is greater than valid lifetime """
 711
 712         try:
 713             address_bin = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 714             address_prefix_length = 60
 715             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 716                                                        address_bin,
 717                                                        address_prefix_length,
 718                                                        self.prefix_group)
 719
 720             self.wait_for_solicit()
 721             self.send_advertise()
 722             self.wait_for_request()
 723             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 724                                           validlft=3)
 725             self.send_reply(iapdopt=ia_pd_opts)
 726
 727             self.sleep(0.5)
 728
 729             # check FIB contains no addresses
 730             fib = self.vapi.ip6_fib_dump()
 731             addresses = set(self.get_interface_addresses(fib, self.pg1))
 732             new_addresses = addresses.difference(self.initial_addresses)
 733             self.assertEqual(len(new_addresses), 0)
 734
 735         finally:
 736             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 737                                                        address_bin,
 738                                                        address_prefix_length,
 739                                                        self.prefix_group,
 740                                                        is_add=0)
 741
 742     def test_T1_greater_than_T2(self):
 743         """ T1 is greater than T2 """
 744
 745         try:
 746             address_bin = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 747             address_prefix_length = 60
 748             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 749                                                        address_bin,
 750                                                        address_prefix_length,
 751                                                        self.prefix_group)
 752
 753             self.wait_for_solicit()
 754             self.send_advertise()
 755             self.wait_for_request()
 756             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 757                                           validlft=8)
 758             self.send_reply(t1=80, t2=40, iapdopt=ia_pd_opts)
 759
 760             self.sleep(0.5)
 761
 762             # check FIB contains no addresses
 763             fib = self.vapi.ip6_fib_dump()
 764             addresses = set(self.get_interface_addresses(fib, self.pg1))
 765             new_addresses = addresses.difference(self.initial_addresses)
 766             self.assertEqual(len(new_addresses), 0)
 767
 768         finally:
 769             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 770                                                        address_bin,
 771                                                        address_prefix_length,
 772                                                        self.prefix_group,
 773                                                        is_add=0)