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 from vpp_papi import VppEnum
  14 import util
  15
  16
  17 def ip6_normalize(ip6):
  18     return inet_ntop(AF_INET6, inet_pton(AF_INET6, ip6))
  19
  20
  21 class TestDHCPv6DataPlane(VppTestCase):
  22     """ DHCPv6 Data Plane Test Case """
  23
  24     @classmethod
  25     def setUpClass(cls):
  26         super(TestDHCPv6DataPlane, cls).setUpClass()
  27
  28     @classmethod
  29     def tearDownClass(cls):
  30         super(TestDHCPv6DataPlane, cls).tearDownClass()
  31
  32     def setUp(self):
  33         super(TestDHCPv6DataPlane, self).setUp()
  34
  35         self.create_pg_interfaces(range(1))
  36         self.interfaces = list(self.pg_interfaces)
  37         for i in self.interfaces:
  38             i.admin_up()
  39             i.config_ip6()
  40
  41         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
  42
  43     def tearDown(self):
  44         for i in self.interfaces:
  45             i.unconfig_ip6()
  46             i.admin_down()
  47         super(TestDHCPv6DataPlane, self).tearDown()
  48
  49     def test_dhcp_ia_na_send_solicit_receive_advertise(self):
  50         """ Verify DHCPv6 IA NA Solicit packet and Advertise event """
  51
  52         self.vapi.dhcp6_clients_enable_disable()
  53
  54         self.pg_enable_capture(self.pg_interfaces)
  55         self.pg_start()
  56         address = {'address': '1:2:3::5',
  57                    'preferred_time': 60,
  58                    'valid_time': 120}
  59         self.vapi.dhcp6_send_client_message(
  60             msg_type=VppEnum.vl_api_dhcpv6_msg_type_t.DHCPV6_MSG_API_SOLICIT,
  61             sw_if_index=self.pg0.sw_if_index,
  62             T1=20,
  63             T2=40,
  64             addresses=[address],
  65             n_addresses=len(
  66                 [address]))
  67         rx_list = self.pg0.get_capture(1)
  68         self.assertEqual(len(rx_list), 1)
  69         packet = rx_list[0]
  70
  71         self.assertEqual(packet.haslayer(IPv6), 1)
  72         self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1)
  73
  74         client_duid = packet[DHCP6OptClientId].duid
  75         trid = packet[DHCP6_Solicit].trid
  76
  77         dst = ip6_normalize(packet[IPv6].dst)
  78         dst2 = ip6_normalize("ff02::1:2")
  79         self.assert_equal(dst, dst2)
  80         src = ip6_normalize(packet[IPv6].src)
  81         src2 = ip6_normalize(self.pg0.local_ip6_ll)
  82         self.assert_equal(src, src2)
  83         ia_na = packet[DHCP6OptIA_NA]
  84         self.assert_equal(ia_na.T1, 20)
  85         self.assert_equal(ia_na.T2, 40)
  86         self.assert_equal(len(ia_na.ianaopts), 1)
  87         address = ia_na.ianaopts[0]
  88         self.assert_equal(address.addr, '1:2:3::5')
  89         self.assert_equal(address.preflft, 60)
  90         self.assert_equal(address.validlft, 120)
  91
  92         self.vapi.want_dhcp6_reply_events()
  93
  94         try:
  95             ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=60,
  96                                            validlft=120)
  97             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
  98                  IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
  99                       dst=self.pg0.local_ip6_ll) /
 100                  UDP(sport=547, dport=546) /
 101                  DHCP6_Advertise(trid=trid) /
 102                  DHCP6OptServerId(duid=self.server_duid) /
 103                  DHCP6OptClientId(duid=client_duid) /
 104                  DHCP6OptPref(prefval=7) /
 105                  DHCP6OptStatusCode(statuscode=1) /
 106                  DHCP6OptIA_NA(iaid=1, T1=20, T2=40, ianaopts=ia_na_opts)
 107                  )
 108             self.pg0.add_stream([p])
 109             self.pg_start()
 110
 111             ev = self.vapi.wait_for_event(1, "dhcp6_reply_event")
 112
 113             self.assert_equal(ev.preference, 7)
 114             self.assert_equal(ev.status_code, 1)
 115             self.assert_equal(ev.T1, 20)
 116             self.assert_equal(ev.T2, 40)
 117
 118             reported_address = ev.addresses[0]
 119             address = ia_na_opts.getfieldval("addr")
 120             self.assert_equal(str(reported_address.address), address)
 121             self.assert_equal(reported_address.preferred_time,
 122                               ia_na_opts.getfieldval("preflft"))
 123             self.assert_equal(reported_address.valid_time,
 124                               ia_na_opts.getfieldval("validlft"))
 125
 126         finally:
 127             self.vapi.want_dhcp6_reply_events(enable_disable=0)
 128
 129     def test_dhcp_pd_send_solicit_receive_advertise(self):
 130         """ Verify DHCPv6 PD Solicit packet and Advertise event """
 131
 132         self.vapi.dhcp6_clients_enable_disable()
 133
 134         self.pg_enable_capture(self.pg_interfaces)
 135         self.pg_start()
 136
 137         prefix = {'prefix': {'address': '1:2:3::', 'len': 50},
 138                   'preferred_time': 60,
 139                   'valid_time': 120}
 140         prefixes = [prefix]
 141         self.vapi.dhcp6_pd_send_client_message(
 142             msg_type=VppEnum.vl_api_dhcpv6_msg_type_t.DHCPV6_MSG_API_SOLICIT,
 143             sw_if_index=self.pg0.sw_if_index,
 144             T1=20,
 145             T2=40,
 146             prefixes=prefixes,
 147             n_prefixes=len(prefixes))
 148         rx_list = self.pg0.get_capture(1)
 149         self.assertEqual(len(rx_list), 1)
 150         packet = rx_list[0]
 151
 152         self.assertEqual(packet.haslayer(IPv6), 1)
 153         self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1)
 154
 155         client_duid = packet[DHCP6OptClientId].duid
 156         trid = packet[DHCP6_Solicit].trid
 157
 158         dst = ip6_normalize(packet[IPv6].dst)
 159         dst2 = ip6_normalize("ff02::1:2")
 160         self.assert_equal(dst, dst2)
 161         src = ip6_normalize(packet[IPv6].src)
 162         src2 = ip6_normalize(self.pg0.local_ip6_ll)
 163         self.assert_equal(src, src2)
 164         ia_pd = packet[DHCP6OptIA_PD]
 165         self.assert_equal(ia_pd.T1, 20)
 166         self.assert_equal(ia_pd.T2, 40)
 167         self.assert_equal(len(ia_pd.iapdopt), 1)
 168         prefix = ia_pd.iapdopt[0]
 169         self.assert_equal(prefix.prefix, '1:2:3::')
 170         self.assert_equal(prefix.plen, 50)
 171         self.assert_equal(prefix.preflft, 60)
 172         self.assert_equal(prefix.validlft, 120)
 173
 174         self.vapi.want_dhcp6_pd_reply_events()
 175
 176         try:
 177             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=60,
 178                                           validlft=120)
 179             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 180                  IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 181                       dst=self.pg0.local_ip6_ll) /
 182                  UDP(sport=547, dport=546) /
 183                  DHCP6_Advertise(trid=trid) /
 184                  DHCP6OptServerId(duid=self.server_duid) /
 185                  DHCP6OptClientId(duid=client_duid) /
 186                  DHCP6OptPref(prefval=7) /
 187                  DHCP6OptStatusCode(statuscode=1) /
 188                  DHCP6OptIA_PD(iaid=1, T1=20, T2=40, iapdopt=ia_pd_opts)
 189                  )
 190             self.pg0.add_stream([p])
 191             self.pg_start()
 192
 193             ev = self.vapi.wait_for_event(1, "dhcp6_pd_reply_event")
 194
 195             self.assert_equal(ev.preference, 7)
 196             self.assert_equal(ev.status_code, 1)
 197             self.assert_equal(ev.T1, 20)
 198             self.assert_equal(ev.T2, 40)
 199
 200             reported_prefix = ev.prefixes[0]
 201             prefix = ia_pd_opts.getfieldval("prefix")
 202             self.assert_equal(
 203                 str(reported_prefix.prefix).split('/')[0], prefix)
 204             self.assert_equal(int(str(reported_prefix.prefix).split('/')[1]),
 205                               ia_pd_opts.getfieldval("plen"))
 206             self.assert_equal(reported_prefix.preferred_time,
 207                               ia_pd_opts.getfieldval("preflft"))
 208             self.assert_equal(reported_prefix.valid_time,
 209                               ia_pd_opts.getfieldval("validlft"))
 210
 211         finally:
 212             self.vapi.want_dhcp6_pd_reply_events(enable_disable=0)
 213
 214
 215 class TestDHCPv6IANAControlPlane(VppTestCase):
 216     """ DHCPv6 IA NA Control Plane Test Case """
 217
 218     @classmethod
 219     def setUpClass(cls):
 220         super(TestDHCPv6IANAControlPlane, cls).setUpClass()
 221
 222     @classmethod
 223     def tearDownClass(cls):
 224         super(TestDHCPv6IANAControlPlane, cls).tearDownClass()
 225
 226     def setUp(self):
 227         super(TestDHCPv6IANAControlPlane, self).setUp()
 228
 229         self.create_pg_interfaces(range(1))
 230         self.interfaces = list(self.pg_interfaces)
 231         for i in self.interfaces:
 232             i.admin_up()
 233
 234         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 235         self.client_duid = None
 236         self.T1 = 1
 237         self.T2 = 2
 238
 239         fib = self.vapi.ip_route_dump(0, True)
 240         self.initial_addresses = set(self.get_interface_addresses(fib,
 241                                                                   self.pg0))
 242
 243         self.pg_enable_capture(self.pg_interfaces)
 244         self.pg_start()
 245
 246         self.vapi.dhcp6_client_enable_disable(self.pg0.sw_if_index)
 247
 248     def tearDown(self):
 249         self.vapi.dhcp6_client_enable_disable(self.pg0.sw_if_index, enable=0)
 250
 251         for i in self.interfaces:
 252             i.admin_down()
 253
 254         super(TestDHCPv6IANAControlPlane, self).tearDown()
 255
 256     @staticmethod
 257     def get_interface_addresses(fib, pg):
 258         lst = []
 259         for entry in fib:
 260             if entry.route.prefix.prefixlen == 128:
 261                 path = entry.route.paths[0]
 262                 if path.sw_if_index == pg.sw_if_index:
 263                     lst.append(str(entry.route.prefix.network_address))
 264         return lst
 265
 266     def get_addresses(self):
 267         fib = self.vapi.ip_route_dump(0, True)
 268         addresses = set(self.get_interface_addresses(fib, self.pg0))
 269         return addresses.difference(self.initial_addresses)
 270
 271     def validate_duid_ll(self, duid):
 272         DUID_LL(duid)
 273
 274     def validate_packet(self, packet, msg_type, is_resend=False):
 275         try:
 276             self.assertEqual(packet.haslayer(msg_type), 1)
 277             client_duid = packet[DHCP6OptClientId].duid
 278             if self.client_duid is None:
 279                 self.client_duid = client_duid
 280                 self.validate_duid_ll(client_duid)
 281             else:
 282                 self.assertEqual(self.client_duid, client_duid)
 283             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 284                 server_duid = packet[DHCP6OptServerId].duid
 285                 self.assertEqual(server_duid, self.server_duid)
 286             if is_resend:
 287                 self.assertEqual(self.trid, packet[msg_type].trid)
 288             else:
 289                 self.trid = packet[msg_type].trid
 290             ip = packet[IPv6]
 291             udp = packet[UDP]
 292             self.assertEqual(ip.dst, 'ff02::1:2')
 293             self.assertEqual(udp.sport, 546)
 294             self.assertEqual(udp.dport, 547)
 295             dhcpv6 = packet[msg_type]
 296             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 297             if (is_resend):
 298                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 299             else:
 300                 self.assertEqual(elapsed_time.elapsedtime, 0)
 301         except BaseException:
 302             packet.show()
 303             raise
 304
 305     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 306         if timeout is None:
 307             timeout = 3
 308         rx_list = self.pg0.get_capture(1, timeout=timeout)
 309         packet = rx_list[0]
 310         self.validate_packet(packet, msg_type, is_resend=is_resend)
 311
 312     def wait_for_solicit(self, timeout=None, is_resend=False):
 313         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 314
 315     def wait_for_request(self, timeout=None, is_resend=False):
 316         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 317
 318     def wait_for_renew(self, timeout=None, is_resend=False):
 319         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 320
 321     def wait_for_rebind(self, timeout=None, is_resend=False):
 322         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 323
 324     def wait_for_release(self, timeout=None, is_resend=False):
 325         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 326
 327     def send_packet(self, msg_type, t1=None, t2=None, ianaopts=None):
 328         if t1 is None:
 329             t1 = self.T1
 330         if t2 is None:
 331             t2 = self.T2
 332         if ianaopts is None:
 333             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2)
 334         else:
 335             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2, ianaopts=ianaopts)
 336         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 337              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 338                   dst=self.pg0.local_ip6_ll) /
 339              UDP(sport=547, dport=546) /
 340              msg_type(trid=self.trid) /
 341              DHCP6OptServerId(duid=self.server_duid) /
 342              DHCP6OptClientId(duid=self.client_duid) /
 343              opt_ia_na
 344              )
 345         self.pg0.add_stream([p])
 346         self.pg_enable_capture(self.pg_interfaces)
 347         self.pg_start()
 348
 349     def send_advertise(self, t1=None, t2=None, ianaopts=None):
 350         self.send_packet(DHCP6_Advertise, t1, t2, ianaopts)
 351
 352     def send_reply(self, t1=None, t2=None, ianaopts=None):
 353         self.send_packet(DHCP6_Reply, t1, t2, ianaopts)
 354
 355     def test_T1_and_T2_timeouts(self):
 356         """ Test T1 and T2 timeouts """
 357
 358         self.wait_for_solicit()
 359         self.send_advertise()
 360         self.wait_for_request()
 361         self.send_reply()
 362
 363         self.sleep(1)
 364
 365         self.wait_for_renew()
 366
 367         self.pg_enable_capture(self.pg_interfaces)
 368
 369         self.sleep(1)
 370
 371         self.wait_for_rebind()
 372
 373     def test_addresses(self):
 374         """ Test handling of addresses """
 375
 376         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=1,
 377                                        validlft=2)
 378
 379         self.wait_for_solicit()
 380         self.send_advertise(t1=20, t2=40, ianaopts=ia_na_opts)
 381         self.wait_for_request()
 382         self.send_reply(t1=20, t2=40, ianaopts=ia_na_opts)
 383         self.sleep(0.1)
 384
 385         # check FIB for new address
 386         new_addresses = self.get_addresses()
 387         self.assertEqual(len(new_addresses), 1)
 388         addr = list(new_addresses)[0]
 389         self.assertEqual(addr, '7:8::2')
 390
 391         self.sleep(2)
 392
 393         # check that the address is deleted
 394         fib = self.vapi.ip_route_dump(0, True)
 395         addresses = set(self.get_interface_addresses(fib, self.pg0))
 396         new_addresses = addresses.difference(self.initial_addresses)
 397         self.assertEqual(len(new_addresses), 0)
 398
 399     def test_sending_client_messages_solicit(self):
 400         """ VPP receives messages from DHCPv6 client """
 401
 402         self.wait_for_solicit()
 403         self.send_packet(DHCP6_Solicit)
 404         self.send_packet(DHCP6_Request)
 405         self.send_packet(DHCP6_Renew)
 406         self.send_packet(DHCP6_Rebind)
 407         self.sleep(1)
 408         self.wait_for_solicit(is_resend=True)
 409
 410     def test_sending_inappropriate_packets(self):
 411         """ Server sends messages with inappropriate message types """
 412
 413         self.wait_for_solicit()
 414         self.send_reply()
 415         self.wait_for_solicit(is_resend=True)
 416         self.send_advertise()
 417         self.wait_for_request()
 418         self.send_advertise()
 419         self.wait_for_request(is_resend=True)
 420         self.send_reply()
 421         self.wait_for_renew()
 422
 423     def test_no_address_available_in_advertise(self):
 424         """ Advertise message contains NoAddrsAvail status code """
 425
 426         self.wait_for_solicit()
 427         noavail = DHCP6OptStatusCode(statuscode=2)  # NoAddrsAvail
 428         self.send_advertise(ianaopts=noavail)
 429         self.wait_for_solicit(is_resend=True)
 430
 431     def test_preferred_greater_than_valid_lifetime(self):
 432         """ Preferred lifetime is greater than valid lifetime """
 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=3)
 438         self.send_reply(ianaopts=ia_na_opts)
 439
 440         self.sleep(0.5)
 441
 442         # check FIB contains no addresses
 443         fib = self.vapi.ip_route_dump(0, True)
 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     def test_T1_greater_than_T2(self):
 449         """ T1 is greater than T2 """
 450
 451         self.wait_for_solicit()
 452         self.send_advertise()
 453         self.wait_for_request()
 454         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=8)
 455         self.send_reply(t1=80, t2=40, ianaopts=ia_na_opts)
 456
 457         self.sleep(0.5)
 458
 459         # check FIB contains no addresses
 460         fib = self.vapi.ip_route_dump(0, True)
 461         addresses = set(self.get_interface_addresses(fib, self.pg0))
 462         new_addresses = addresses.difference(self.initial_addresses)
 463         self.assertEqual(len(new_addresses), 0)
 464
 465
 466 class TestDHCPv6PDControlPlane(VppTestCase):
 467     """ DHCPv6 PD Control Plane Test Case """
 468
 469     @classmethod
 470     def setUpClass(cls):
 471         super(TestDHCPv6PDControlPlane, cls).setUpClass()
 472
 473     @classmethod
 474     def tearDownClass(cls):
 475         super(TestDHCPv6PDControlPlane, cls).tearDownClass()
 476
 477     def setUp(self):
 478         super(TestDHCPv6PDControlPlane, self).setUp()
 479
 480         self.create_pg_interfaces(range(2))
 481         self.interfaces = list(self.pg_interfaces)
 482         for i in self.interfaces:
 483             i.admin_up()
 484
 485         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 486         self.client_duid = None
 487         self.T1 = 1
 488         self.T2 = 2
 489
 490         fib = self.vapi.ip_route_dump(0, True)
 491         self.initial_addresses = set(self.get_interface_addresses(fib,
 492                                                                   self.pg1))
 493
 494         self.pg_enable_capture(self.pg_interfaces)
 495         self.pg_start()
 496
 497         self.prefix_group = 'my-pd-prefix-group'
 498
 499         self.vapi.dhcp6_pd_client_enable_disable(
 500             self.pg0.sw_if_index,
 501             prefix_group=self.prefix_group)
 502
 503     def tearDown(self):
 504         self.vapi.dhcp6_pd_client_enable_disable(self.pg0.sw_if_index,
 505                                                  enable=0)
 506
 507         for i in self.interfaces:
 508             i.admin_down()
 509
 510         super(TestDHCPv6PDControlPlane, self).tearDown()
 511
 512     @staticmethod
 513     def get_interface_addresses(fib, pg):
 514         lst = []
 515         for entry in fib:
 516             if entry.route.prefix.prefixlen == 128:
 517                 path = entry.route.paths[0]
 518                 if path.sw_if_index == pg.sw_if_index:
 519                     lst.append(str(entry.route.prefix.network_address))
 520         return lst
 521
 522     def get_addresses(self):
 523         fib = self.vapi.ip_route_dump(0, True)
 524         addresses = set(self.get_interface_addresses(fib, self.pg1))
 525         return addresses.difference(self.initial_addresses)
 526
 527     def validate_duid_ll(self, duid):
 528         DUID_LL(duid)
 529
 530     def validate_packet(self, packet, msg_type, is_resend=False):
 531         try:
 532             self.assertEqual(packet.haslayer(msg_type), 1)
 533             client_duid = packet[DHCP6OptClientId].duid
 534             if self.client_duid is None:
 535                 self.client_duid = client_duid
 536                 self.validate_duid_ll(client_duid)
 537             else:
 538                 self.assertEqual(self.client_duid, client_duid)
 539             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 540                 server_duid = packet[DHCP6OptServerId].duid
 541                 self.assertEqual(server_duid, self.server_duid)
 542             if is_resend:
 543                 self.assertEqual(self.trid, packet[msg_type].trid)
 544             else:
 545                 self.trid = packet[msg_type].trid
 546             ip = packet[IPv6]
 547             udp = packet[UDP]
 548             self.assertEqual(ip.dst, 'ff02::1:2')
 549             self.assertEqual(udp.sport, 546)
 550             self.assertEqual(udp.dport, 547)
 551             dhcpv6 = packet[msg_type]
 552             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 553             if (is_resend):
 554                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 555             else:
 556                 self.assertEqual(elapsed_time.elapsedtime, 0)
 557         except BaseException:
 558             packet.show()
 559             raise
 560
 561     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 562         if timeout is None:
 563             timeout = 3
 564         rx_list = self.pg0.get_capture(1, timeout=timeout)
 565         packet = rx_list[0]
 566         self.validate_packet(packet, msg_type, is_resend=is_resend)
 567
 568     def wait_for_solicit(self, timeout=None, is_resend=False):
 569         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 570
 571     def wait_for_request(self, timeout=None, is_resend=False):
 572         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 573
 574     def wait_for_renew(self, timeout=None, is_resend=False):
 575         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 576
 577     def wait_for_rebind(self, timeout=None, is_resend=False):
 578         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 579
 580     def wait_for_release(self, timeout=None, is_resend=False):
 581         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 582
 583     def send_packet(self, msg_type, t1=None, t2=None, iapdopt=None):
 584         if t1 is None:
 585             t1 = self.T1
 586         if t2 is None:
 587             t2 = self.T2
 588         if iapdopt is None:
 589             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2)
 590         else:
 591             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2, iapdopt=iapdopt)
 592         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 593              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 594                   dst=self.pg0.local_ip6_ll) /
 595              UDP(sport=547, dport=546) /
 596              msg_type(trid=self.trid) /
 597              DHCP6OptServerId(duid=self.server_duid) /
 598              DHCP6OptClientId(duid=self.client_duid) /
 599              opt_ia_pd
 600              )
 601         self.pg0.add_stream([p])
 602         self.pg_enable_capture(self.pg_interfaces)
 603         self.pg_start()
 604
 605     def send_advertise(self, t1=None, t2=None, iapdopt=None):
 606         self.send_packet(DHCP6_Advertise, t1, t2, iapdopt)
 607
 608     def send_reply(self, t1=None, t2=None, iapdopt=None):
 609         self.send_packet(DHCP6_Reply, t1, t2, iapdopt)
 610
 611     def test_T1_and_T2_timeouts(self):
 612         """ Test T1 and T2 timeouts """
 613
 614         self.wait_for_solicit()
 615         self.send_advertise()
 616         self.wait_for_request()
 617         self.send_reply()
 618
 619         self.sleep(1)
 620
 621         self.wait_for_renew()
 622
 623         self.pg_enable_capture(self.pg_interfaces)
 624
 625         self.sleep(1)
 626
 627         self.wait_for_rebind()
 628
 629     def test_prefixes(self):
 630         """ Test handling of prefixes """
 631
 632         address_bin_1 = None
 633         address_bin_2 = None
 634         try:
 635             address_bin_1 = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 636             address_prefix_length_1 = 60
 637             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 638                                                        address_bin_1,
 639                                                        address_prefix_length_1,
 640                                                        self.prefix_group)
 641
 642             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=2,
 643                                           validlft=3)
 644
 645             self.wait_for_solicit()
 646             self.send_advertise(t1=20, t2=40, iapdopt=ia_pd_opts)
 647             self.wait_for_request()
 648             self.send_reply(t1=20, t2=40, iapdopt=ia_pd_opts)
 649             self.sleep(0.1)
 650
 651             # check FIB for new address
 652             new_addresses = self.get_addresses()
 653             self.assertEqual(len(new_addresses), 1)
 654             addr = list(new_addresses)[0]
 655             self.assertEqual(addr, '7:8:0:2::405')
 656
 657             self.sleep(1)
 658
 659             address_bin_2 = '\x00' * 6 + '\x00\x76' + '\x00' * 6 + '\x04\x06'
 660             address_prefix_length_2 = 62
 661             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 662                                                        address_bin_2,
 663                                                        address_prefix_length_2,
 664                                                        self.prefix_group)
 665
 666             self.sleep(1)
 667
 668             # check FIB contains 2 addresses
 669             fib = self.vapi.ip_route_dump(0, True)
 670             addresses = set(self.get_interface_addresses(fib, self.pg1))
 671             new_addresses = addresses.difference(self.initial_addresses)
 672             self.assertEqual(len(new_addresses), 2)
 673             addr1 = list(new_addresses)[0]
 674             addr2 = list(new_addresses)[1]
 675             if addr1 == '7:8:0:76::406':
 676                 addr1, addr2 = addr2, addr1
 677             self.assertEqual(addr1, '7:8:0:2::405')
 678             self.assertEqual(addr2, '7:8:0:76::406')
 679
 680             self.sleep(1)
 681
 682             # check that the addresses are deleted
 683             fib = self.vapi.ip_route_dump(0, True)
 684             addresses = set(self.get_interface_addresses(fib, self.pg1))
 685             new_addresses = addresses.difference(self.initial_addresses)
 686             self.assertEqual(len(new_addresses), 0)
 687
 688         finally:
 689             if address_bin_1 is not None:
 690                 self.vapi.ip6_add_del_address_using_prefix(
 691                     self.pg1.sw_if_index, address_bin_1,
 692                     address_prefix_length_1, self.prefix_group, is_add=0)
 693             if address_bin_2 is not None:
 694                 self.vapi.ip6_add_del_address_using_prefix(
 695                     self.pg1.sw_if_index, address_bin_2,
 696                     address_prefix_length_2, self.prefix_group, is_add=0)
 697
 698     def test_sending_client_messages_solicit(self):
 699         """ VPP receives messages from DHCPv6 client """
 700
 701         self.wait_for_solicit()
 702         self.send_packet(DHCP6_Solicit)
 703         self.send_packet(DHCP6_Request)
 704         self.send_packet(DHCP6_Renew)
 705         self.send_packet(DHCP6_Rebind)
 706         self.sleep(1)
 707         self.wait_for_solicit(is_resend=True)
 708
 709     def test_sending_inappropriate_packets(self):
 710         """ Server sends messages with inappropriate message types """
 711
 712         self.wait_for_solicit()
 713         self.send_reply()
 714         self.wait_for_solicit(is_resend=True)
 715         self.send_advertise()
 716         self.wait_for_request()
 717         self.send_advertise()
 718         self.wait_for_request(is_resend=True)
 719         self.send_reply()
 720         self.wait_for_renew()
 721
 722     def test_no_prefix_available_in_advertise(self):
 723         """ Advertise message contains NoPrefixAvail status code """
 724
 725         self.wait_for_solicit()
 726         noavail = DHCP6OptStatusCode(statuscode=6)  # NoPrefixAvail
 727         self.send_advertise(iapdopt=noavail)
 728         self.wait_for_solicit(is_resend=True)
 729
 730     def test_preferred_greater_than_valid_lifetime(self):
 731         """ Preferred lifetime is greater than valid lifetime """
 732
 733         try:
 734             address_bin = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 735             address_prefix_length = 60
 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
 741             self.wait_for_solicit()
 742             self.send_advertise()
 743             self.wait_for_request()
 744             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 745                                           validlft=3)
 746             self.send_reply(iapdopt=ia_pd_opts)
 747
 748             self.sleep(0.5)
 749
 750             # check FIB contains no addresses
 751             fib = self.vapi.ip_route_dump(0, True)
 752             addresses = set(self.get_interface_addresses(fib, self.pg1))
 753             new_addresses = addresses.difference(self.initial_addresses)
 754             self.assertEqual(len(new_addresses), 0)
 755
 756         finally:
 757             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 758                                                        address_bin,
 759                                                        address_prefix_length,
 760                                                        self.prefix_group,
 761                                                        is_add=0)
 762
 763     def test_T1_greater_than_T2(self):
 764         """ T1 is greater than T2 """
 765
 766         try:
 767             address_bin = '\x00' * 6 + '\x00\x02' + '\x00' * 6 + '\x04\x05'
 768             address_prefix_length = 60
 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
 774             self.wait_for_solicit()
 775             self.send_advertise()
 776             self.wait_for_request()
 777             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 778                                           validlft=8)
 779             self.send_reply(t1=80, t2=40, iapdopt=ia_pd_opts)
 780
 781             self.sleep(0.5)
 782
 783             # check FIB contains no addresses
 784             fib = self.vapi.ip_route_dump(0, True)
 785             addresses = set(self.get_interface_addresses(fib, self.pg1))
 786             new_addresses = addresses.difference(self.initial_addresses)
 787             self.assertEqual(len(new_addresses), 0)
 788
 789         finally:
 790             self.vapi.ip6_add_del_address_using_prefix(self.pg1.sw_if_index,
 791                                                        address_bin,
 792                                                        address_prefix_length,
 793                                                        self.prefix_group,
 794                                                        is_add=0)