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