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