src/plugins/dhcp/test/test_dhcp6.py

   1 from socket import AF_INET6, inet_ntop, inet_pton
   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
  11 from framework import VppTestCase
  12 from vpp_papi import VppEnum
  13 import util
  14 import os
  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(enable=1)
  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             server_index=0xffffffff,
  61             mrc=1,
  62             msg_type=VppEnum.vl_api_dhcpv6_msg_type_t.DHCPV6_MSG_API_SOLICIT,
  63             sw_if_index=self.pg0.sw_if_index,
  64             T1=20,
  65             T2=40,
  66             addresses=[address],
  67             n_addresses=len(
  68                 [address]))
  69         rx_list = self.pg0.get_capture(1)
  70         self.assertEqual(len(rx_list), 1)
  71         packet = rx_list[0]
  72
  73         self.assertEqual(packet.haslayer(IPv6), 1)
  74         self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1)
  75
  76         client_duid = packet[DHCP6OptClientId].duid
  77         trid = packet[DHCP6_Solicit].trid
  78
  79         dst = ip6_normalize(packet[IPv6].dst)
  80         dst2 = ip6_normalize("ff02::1:2")
  81         self.assert_equal(dst, dst2)
  82         src = ip6_normalize(packet[IPv6].src)
  83         src2 = ip6_normalize(self.pg0.local_ip6_ll)
  84         self.assert_equal(src, src2)
  85         ia_na = packet[DHCP6OptIA_NA]
  86         self.assert_equal(ia_na.T1, 20)
  87         self.assert_equal(ia_na.T2, 40)
  88         self.assert_equal(len(ia_na.ianaopts), 1)
  89         address = ia_na.ianaopts[0]
  90         self.assert_equal(address.addr, '1:2:3::5')
  91         self.assert_equal(address.preflft, 60)
  92         self.assert_equal(address.validlft, 120)
  93
  94         self.vapi.want_dhcp6_reply_events(enable_disable=1,
  95                                           pid=os.getpid())
  96
  97         try:
  98             ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=60,
  99                                            validlft=120)
 100             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 101                  IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 102                       dst=self.pg0.local_ip6_ll) /
 103                  UDP(sport=547, dport=546) /
 104                  DHCP6_Advertise(trid=trid) /
 105                  DHCP6OptServerId(duid=self.server_duid) /
 106                  DHCP6OptClientId(duid=client_duid) /
 107                  DHCP6OptPref(prefval=7) /
 108                  DHCP6OptStatusCode(statuscode=1) /
 109                  DHCP6OptIA_NA(iaid=1, T1=20, T2=40, ianaopts=ia_na_opts)
 110                  )
 111             self.pg0.add_stream([p])
 112             self.pg_start()
 113
 114             ev = self.vapi.wait_for_event(1, "dhcp6_reply_event")
 115
 116             self.assert_equal(ev.preference, 7)
 117             self.assert_equal(ev.status_code, 1)
 118             self.assert_equal(ev.T1, 20)
 119             self.assert_equal(ev.T2, 40)
 120
 121             reported_address = ev.addresses[0]
 122             address = ia_na_opts.getfieldval("addr")
 123             self.assert_equal(str(reported_address.address), address)
 124             self.assert_equal(reported_address.preferred_time,
 125                               ia_na_opts.getfieldval("preflft"))
 126             self.assert_equal(reported_address.valid_time,
 127                               ia_na_opts.getfieldval("validlft"))
 128
 129         finally:
 130             self.vapi.want_dhcp6_reply_events(enable_disable=0)
 131         self.vapi.dhcp6_clients_enable_disable(enable=0)
 132
 133     def test_dhcp_pd_send_solicit_receive_advertise(self):
 134         """ Verify DHCPv6 PD Solicit packet and Advertise event """
 135
 136         self.vapi.dhcp6_clients_enable_disable(enable=1)
 137
 138         self.pg_enable_capture(self.pg_interfaces)
 139         self.pg_start()
 140
 141         prefix = {'prefix': {'address': '1:2:3::', 'len': 50},
 142                   'preferred_time': 60,
 143                   'valid_time': 120}
 144         prefixes = [prefix]
 145         self.vapi.dhcp6_pd_send_client_message(
 146             server_index=0xffffffff,
 147             mrc=1,
 148             msg_type=VppEnum.vl_api_dhcpv6_msg_type_t.DHCPV6_MSG_API_SOLICIT,
 149             sw_if_index=self.pg0.sw_if_index,
 150             T1=20,
 151             T2=40,
 152             prefixes=prefixes,
 153             n_prefixes=len(prefixes))
 154         rx_list = self.pg0.get_capture(1)
 155         self.assertEqual(len(rx_list), 1)
 156         packet = rx_list[0]
 157
 158         self.assertEqual(packet.haslayer(IPv6), 1)
 159         self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1)
 160
 161         client_duid = packet[DHCP6OptClientId].duid
 162         trid = packet[DHCP6_Solicit].trid
 163
 164         dst = ip6_normalize(packet[IPv6].dst)
 165         dst2 = ip6_normalize("ff02::1:2")
 166         self.assert_equal(dst, dst2)
 167         src = ip6_normalize(packet[IPv6].src)
 168         src2 = ip6_normalize(self.pg0.local_ip6_ll)
 169         self.assert_equal(src, src2)
 170         ia_pd = packet[DHCP6OptIA_PD]
 171         self.assert_equal(ia_pd.T1, 20)
 172         self.assert_equal(ia_pd.T2, 40)
 173         self.assert_equal(len(ia_pd.iapdopt), 1)
 174         prefix = ia_pd.iapdopt[0]
 175         self.assert_equal(prefix.prefix, '1:2:3::')
 176         self.assert_equal(prefix.plen, 50)
 177         self.assert_equal(prefix.preflft, 60)
 178         self.assert_equal(prefix.validlft, 120)
 179
 180         self.vapi.want_dhcp6_pd_reply_events(enable_disable=1,
 181                                              pid=os.getpid())
 182
 183         try:
 184             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=60,
 185                                           validlft=120)
 186             p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 187                  IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 188                       dst=self.pg0.local_ip6_ll) /
 189                  UDP(sport=547, dport=546) /
 190                  DHCP6_Advertise(trid=trid) /
 191                  DHCP6OptServerId(duid=self.server_duid) /
 192                  DHCP6OptClientId(duid=client_duid) /
 193                  DHCP6OptPref(prefval=7) /
 194                  DHCP6OptStatusCode(statuscode=1) /
 195                  DHCP6OptIA_PD(iaid=1, T1=20, T2=40, iapdopt=ia_pd_opts)
 196                  )
 197             self.pg0.add_stream([p])
 198             self.pg_start()
 199
 200             ev = self.vapi.wait_for_event(1, "dhcp6_pd_reply_event")
 201
 202             self.assert_equal(ev.preference, 7)
 203             self.assert_equal(ev.status_code, 1)
 204             self.assert_equal(ev.T1, 20)
 205             self.assert_equal(ev.T2, 40)
 206
 207             reported_prefix = ev.prefixes[0]
 208             prefix = ia_pd_opts.getfieldval("prefix")
 209             self.assert_equal(
 210                 str(reported_prefix.prefix).split('/')[0], prefix)
 211             self.assert_equal(int(str(reported_prefix.prefix).split('/')[1]),
 212                               ia_pd_opts.getfieldval("plen"))
 213             self.assert_equal(reported_prefix.preferred_time,
 214                               ia_pd_opts.getfieldval("preflft"))
 215             self.assert_equal(reported_prefix.valid_time,
 216                               ia_pd_opts.getfieldval("validlft"))
 217
 218         finally:
 219             self.vapi.want_dhcp6_pd_reply_events(enable_disable=0)
 220         self.vapi.dhcp6_clients_enable_disable(enable=0)
 221
 222
 223 class TestDHCPv6IANAControlPlane(VppTestCase):
 224     """ DHCPv6 IA NA Control Plane Test Case """
 225
 226     @classmethod
 227     def force_solo(cls):
 228         return True
 229
 230     @classmethod
 231     def setUpClass(cls):
 232         super(TestDHCPv6IANAControlPlane, cls).setUpClass()
 233
 234     @classmethod
 235     def tearDownClass(cls):
 236         super(TestDHCPv6IANAControlPlane, cls).tearDownClass()
 237
 238     def setUp(self):
 239         super(TestDHCPv6IANAControlPlane, self).setUp()
 240
 241         self.create_pg_interfaces(range(1))
 242         self.interfaces = list(self.pg_interfaces)
 243         for i in self.interfaces:
 244             i.admin_up()
 245
 246         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 247         self.client_duid = None
 248         self.T1 = 1
 249         self.T2 = 2
 250
 251         fib = self.vapi.ip_route_dump(0, True)
 252         self.initial_addresses = set(self.get_interface_addresses(fib,
 253                                                                   self.pg0))
 254
 255         self.pg_enable_capture(self.pg_interfaces)
 256         self.pg_start()
 257
 258         self.vapi.dhcp6_client_enable_disable(sw_if_index=self.pg0.sw_if_index,
 259                                               enable=1)
 260
 261     def tearDown(self):
 262         self.vapi.dhcp6_client_enable_disable(sw_if_index=self.pg0.sw_if_index,
 263                                               enable=0)
 264
 265         for i in self.interfaces:
 266             i.admin_down()
 267
 268         super(TestDHCPv6IANAControlPlane, self).tearDown()
 269
 270     @staticmethod
 271     def get_interface_addresses(fib, pg):
 272         lst = []
 273         for entry in fib:
 274             if entry.route.prefix.prefixlen == 128:
 275                 path = entry.route.paths[0]
 276                 if path.sw_if_index == pg.sw_if_index:
 277                     lst.append(str(entry.route.prefix.network_address))
 278         return lst
 279
 280     def get_addresses(self):
 281         fib = self.vapi.ip_route_dump(0, True)
 282         addresses = set(self.get_interface_addresses(fib, self.pg0))
 283         return addresses.difference(self.initial_addresses)
 284
 285     def validate_duid_ll(self, duid):
 286         DUID_LL(duid)
 287
 288     def validate_packet(self, packet, msg_type, is_resend=False):
 289         try:
 290             self.assertEqual(packet.haslayer(msg_type), 1)
 291             client_duid = packet[DHCP6OptClientId].duid
 292             if self.client_duid is None:
 293                 self.client_duid = client_duid
 294                 self.validate_duid_ll(client_duid)
 295             else:
 296                 self.assertEqual(self.client_duid, client_duid)
 297             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 298                 server_duid = packet[DHCP6OptServerId].duid
 299                 self.assertEqual(server_duid, self.server_duid)
 300             if is_resend:
 301                 self.assertEqual(self.trid, packet[msg_type].trid)
 302             else:
 303                 self.trid = packet[msg_type].trid
 304             ip = packet[IPv6]
 305             udp = packet[UDP]
 306             self.assertEqual(ip.dst, 'ff02::1:2')
 307             self.assertEqual(udp.sport, 546)
 308             self.assertEqual(udp.dport, 547)
 309             dhcpv6 = packet[msg_type]
 310             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 311             if (is_resend):
 312                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 313             else:
 314                 self.assertEqual(elapsed_time.elapsedtime, 0)
 315         except BaseException:
 316             packet.show()
 317             raise
 318
 319     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 320         if timeout is None:
 321             timeout = 3
 322         rx_list = self.pg0.get_capture(1, timeout=timeout)
 323         packet = rx_list[0]
 324         self.validate_packet(packet, msg_type, is_resend=is_resend)
 325
 326     def wait_for_solicit(self, timeout=None, is_resend=False):
 327         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 328
 329     def wait_for_request(self, timeout=None, is_resend=False):
 330         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 331
 332     def wait_for_renew(self, timeout=None, is_resend=False):
 333         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 334
 335     def wait_for_rebind(self, timeout=None, is_resend=False):
 336         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 337
 338     def wait_for_release(self, timeout=None, is_resend=False):
 339         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 340
 341     def send_packet(self, msg_type, t1=None, t2=None, ianaopts=None):
 342         if t1 is None:
 343             t1 = self.T1
 344         if t2 is None:
 345             t2 = self.T2
 346         if ianaopts is None:
 347             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2)
 348         else:
 349             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2, ianaopts=ianaopts)
 350         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 351              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 352                   dst=self.pg0.local_ip6_ll) /
 353              UDP(sport=547, dport=546) /
 354              msg_type(trid=self.trid) /
 355              DHCP6OptServerId(duid=self.server_duid) /
 356              DHCP6OptClientId(duid=self.client_duid) /
 357              opt_ia_na
 358              )
 359         self.pg0.add_stream([p])
 360         self.pg_enable_capture(self.pg_interfaces)
 361         self.pg_start()
 362
 363     def send_advertise(self, t1=None, t2=None, ianaopts=None):
 364         self.send_packet(DHCP6_Advertise, t1, t2, ianaopts)
 365
 366     def send_reply(self, t1=None, t2=None, ianaopts=None):
 367         self.send_packet(DHCP6_Reply, t1, t2, ianaopts)
 368
 369     def test_T1_and_T2_timeouts(self):
 370         """ Test T1 and T2 timeouts """
 371
 372         self.wait_for_solicit()
 373         self.send_advertise()
 374         self.wait_for_request()
 375         self.send_reply()
 376
 377         self.sleep(1)
 378
 379         self.wait_for_renew()
 380
 381         self.pg_enable_capture(self.pg_interfaces)
 382
 383         self.sleep(1)
 384
 385         self.wait_for_rebind()
 386
 387     def test_addresses(self):
 388         """ Test handling of addresses """
 389
 390         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=1,
 391                                        validlft=2)
 392
 393         self.wait_for_solicit()
 394         self.send_advertise(t1=20, t2=40, ianaopts=ia_na_opts)
 395         self.wait_for_request()
 396         self.send_reply(t1=20, t2=40, ianaopts=ia_na_opts)
 397         self.sleep(0.1)
 398
 399         # check FIB for new address
 400         new_addresses = self.get_addresses()
 401         self.assertEqual(len(new_addresses), 1)
 402         addr = list(new_addresses)[0]
 403         self.assertEqual(addr, '7:8::2')
 404
 405         self.sleep(2)
 406
 407         # check that the address is deleted
 408         fib = self.vapi.ip_route_dump(0, True)
 409         addresses = set(self.get_interface_addresses(fib, self.pg0))
 410         new_addresses = addresses.difference(self.initial_addresses)
 411         self.assertEqual(len(new_addresses), 0)
 412
 413     def test_sending_client_messages_solicit(self):
 414         """ VPP receives messages from DHCPv6 client """
 415
 416         self.wait_for_solicit()
 417         self.send_packet(DHCP6_Solicit)
 418         self.send_packet(DHCP6_Request)
 419         self.send_packet(DHCP6_Renew)
 420         self.send_packet(DHCP6_Rebind)
 421         self.sleep(1)
 422         self.wait_for_solicit(is_resend=True)
 423
 424     def test_sending_inappropriate_packets(self):
 425         """ Server sends messages with inappropriate message types """
 426
 427         self.wait_for_solicit()
 428         self.send_reply()
 429         self.wait_for_solicit(is_resend=True)
 430         self.send_advertise()
 431         self.wait_for_request()
 432         self.send_advertise()
 433         self.wait_for_request(is_resend=True)
 434         self.send_reply()
 435         self.wait_for_renew()
 436
 437     def test_no_address_available_in_advertise(self):
 438         """ Advertise message contains NoAddrsAvail status code """
 439
 440         self.wait_for_solicit()
 441         noavail = DHCP6OptStatusCode(statuscode=2)  # NoAddrsAvail
 442         self.send_advertise(ianaopts=noavail)
 443         self.wait_for_solicit(is_resend=True)
 444
 445     def test_preferred_greater_than_valid_lifetime(self):
 446         """ Preferred lifetime is greater than valid lifetime """
 447
 448         self.wait_for_solicit()
 449         self.send_advertise()
 450         self.wait_for_request()
 451         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=3)
 452         self.send_reply(ianaopts=ia_na_opts)
 453
 454         self.sleep(0.5)
 455
 456         # check FIB contains no addresses
 457         fib = self.vapi.ip_route_dump(0, True)
 458         addresses = set(self.get_interface_addresses(fib, self.pg0))
 459         new_addresses = addresses.difference(self.initial_addresses)
 460         self.assertEqual(len(new_addresses), 0)
 461
 462     def test_T1_greater_than_T2(self):
 463         """ T1 is greater than T2 """
 464
 465         self.wait_for_solicit()
 466         self.send_advertise()
 467         self.wait_for_request()
 468         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=8)
 469         self.send_reply(t1=80, t2=40, ianaopts=ia_na_opts)
 470
 471         self.sleep(0.5)
 472
 473         # check FIB contains no addresses
 474         fib = self.vapi.ip_route_dump(0, True)
 475         addresses = set(self.get_interface_addresses(fib, self.pg0))
 476         new_addresses = addresses.difference(self.initial_addresses)
 477         self.assertEqual(len(new_addresses), 0)
 478
 479
 480 class TestDHCPv6PDControlPlane(VppTestCase):
 481     """ DHCPv6 PD Control Plane Test Case """
 482
 483     @classmethod
 484     def setUpClass(cls):
 485         super(TestDHCPv6PDControlPlane, cls).setUpClass()
 486
 487     @classmethod
 488     def tearDownClass(cls):
 489         super(TestDHCPv6PDControlPlane, cls).tearDownClass()
 490
 491     def setUp(self):
 492         super(TestDHCPv6PDControlPlane, self).setUp()
 493
 494         self.create_pg_interfaces(range(2))
 495         self.interfaces = list(self.pg_interfaces)
 496         for i in self.interfaces:
 497             i.admin_up()
 498
 499         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 500         self.client_duid = None
 501         self.T1 = 1
 502         self.T2 = 2
 503
 504         fib = self.vapi.ip_route_dump(0, True)
 505         self.initial_addresses = set(self.get_interface_addresses(fib,
 506                                                                   self.pg1))
 507
 508         self.pg_enable_capture(self.pg_interfaces)
 509         self.pg_start()
 510
 511         self.prefix_group = 'my-pd-prefix-group'
 512
 513         self.vapi.dhcp6_pd_client_enable_disable(
 514             enable=1,
 515             sw_if_index=self.pg0.sw_if_index,
 516             prefix_group=self.prefix_group)
 517
 518     def tearDown(self):
 519         self.vapi.dhcp6_pd_client_enable_disable(self.pg0.sw_if_index,
 520                                                  enable=0)
 521
 522         for i in self.interfaces:
 523             i.admin_down()
 524
 525         super(TestDHCPv6PDControlPlane, self).tearDown()
 526
 527     @staticmethod
 528     def get_interface_addresses(fib, pg):
 529         lst = []
 530         for entry in fib:
 531             if entry.route.prefix.prefixlen == 128:
 532                 path = entry.route.paths[0]
 533                 if path.sw_if_index == pg.sw_if_index:
 534                     lst.append(str(entry.route.prefix.network_address))
 535         return lst
 536
 537     def get_addresses(self):
 538         fib = self.vapi.ip_route_dump(0, True)
 539         addresses = set(self.get_interface_addresses(fib, self.pg1))
 540         return addresses.difference(self.initial_addresses)
 541
 542     def validate_duid_ll(self, duid):
 543         DUID_LL(duid)
 544
 545     def validate_packet(self, packet, msg_type, is_resend=False):
 546         try:
 547             self.assertEqual(packet.haslayer(msg_type), 1)
 548             client_duid = packet[DHCP6OptClientId].duid
 549             if self.client_duid is None:
 550                 self.client_duid = client_duid
 551                 self.validate_duid_ll(client_duid)
 552             else:
 553                 self.assertEqual(self.client_duid, client_duid)
 554             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 555                 server_duid = packet[DHCP6OptServerId].duid
 556                 self.assertEqual(server_duid, self.server_duid)
 557             if is_resend:
 558                 self.assertEqual(self.trid, packet[msg_type].trid)
 559             else:
 560                 self.trid = packet[msg_type].trid
 561             ip = packet[IPv6]
 562             udp = packet[UDP]
 563             self.assertEqual(ip.dst, 'ff02::1:2')
 564             self.assertEqual(udp.sport, 546)
 565             self.assertEqual(udp.dport, 547)
 566             dhcpv6 = packet[msg_type]
 567             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 568             if (is_resend):
 569                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 570             else:
 571                 self.assertEqual(elapsed_time.elapsedtime, 0)
 572         except BaseException:
 573             packet.show()
 574             raise
 575
 576     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 577         if timeout is None:
 578             timeout = 3
 579         rx_list = self.pg0.get_capture(1, timeout=timeout)
 580         packet = rx_list[0]
 581         self.validate_packet(packet, msg_type, is_resend=is_resend)
 582
 583     def wait_for_solicit(self, timeout=None, is_resend=False):
 584         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 585
 586     def wait_for_request(self, timeout=None, is_resend=False):
 587         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 588
 589     def wait_for_renew(self, timeout=None, is_resend=False):
 590         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 591
 592     def wait_for_rebind(self, timeout=None, is_resend=False):
 593         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 594
 595     def wait_for_release(self, timeout=None, is_resend=False):
 596         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 597
 598     def send_packet(self, msg_type, t1=None, t2=None, iapdopt=None):
 599         if t1 is None:
 600             t1 = self.T1
 601         if t2 is None:
 602             t2 = self.T2
 603         if iapdopt is None:
 604             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2)
 605         else:
 606             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2, iapdopt=iapdopt)
 607         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 608              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 609                   dst=self.pg0.local_ip6_ll) /
 610              UDP(sport=547, dport=546) /
 611              msg_type(trid=self.trid) /
 612              DHCP6OptServerId(duid=self.server_duid) /
 613              DHCP6OptClientId(duid=self.client_duid) /
 614              opt_ia_pd
 615              )
 616         self.pg0.add_stream([p])
 617         self.pg_enable_capture(self.pg_interfaces)
 618         self.pg_start()
 619
 620     def send_advertise(self, t1=None, t2=None, iapdopt=None):
 621         self.send_packet(DHCP6_Advertise, t1, t2, iapdopt)
 622
 623     def send_reply(self, t1=None, t2=None, iapdopt=None):
 624         self.send_packet(DHCP6_Reply, t1, t2, iapdopt)
 625
 626     def test_T1_and_T2_timeouts(self):
 627         """ Test T1 and T2 timeouts """
 628
 629         self.wait_for_solicit()
 630         self.send_advertise()
 631         self.wait_for_request()
 632         self.send_reply()
 633
 634         self.sleep(1)
 635
 636         self.wait_for_renew()
 637
 638         self.pg_enable_capture(self.pg_interfaces)
 639
 640         self.sleep(1)
 641
 642         self.wait_for_rebind()
 643
 644     def test_prefixes(self):
 645         """ Test handling of prefixes """
 646
 647         address1 = '::2:0:0:0:405/60'
 648         address2 = '::76:0:0:0:406/62'
 649         try:
 650             self.vapi.ip6_add_del_address_using_prefix(
 651                 sw_if_index=self.pg1.sw_if_index,
 652                 address_with_prefix=address1,
 653                 prefix_group=self.prefix_group)
 654
 655             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=2,
 656                                           validlft=3)
 657
 658             self.wait_for_solicit()
 659             self.send_advertise(t1=20, t2=40, iapdopt=ia_pd_opts)
 660             self.wait_for_request()
 661             self.send_reply(t1=20, t2=40, iapdopt=ia_pd_opts)
 662             self.sleep(0.1)
 663
 664             # check FIB for new address
 665             new_addresses = self.get_addresses()
 666             self.assertEqual(len(new_addresses), 1)
 667             addr = list(new_addresses)[0]
 668             self.assertEqual(addr, '7:8:0:2::405')
 669
 670             self.sleep(1)
 671
 672             self.vapi.ip6_add_del_address_using_prefix(
 673                 sw_if_index=self.pg1.sw_if_index,
 674                 address_with_prefix=address2,
 675                 prefix_group=self.prefix_group)
 676
 677             self.sleep(1)
 678
 679             # check FIB contains 2 addresses
 680             fib = self.vapi.ip_route_dump(0, True)
 681             addresses = set(self.get_interface_addresses(fib, self.pg1))
 682             new_addresses = addresses.difference(self.initial_addresses)
 683             self.assertEqual(len(new_addresses), 2)
 684             addr1 = list(new_addresses)[0]
 685             addr2 = list(new_addresses)[1]
 686             if addr1 == '7:8:0:76::406':
 687                 addr1, addr2 = addr2, addr1
 688             self.assertEqual(addr1, '7:8:0:2::405')
 689             self.assertEqual(addr2, '7:8:0:76::406')
 690
 691             self.sleep(1)
 692
 693             # check that the addresses are deleted
 694             fib = self.vapi.ip_route_dump(0, True)
 695             addresses = set(self.get_interface_addresses(fib, self.pg1))
 696             new_addresses = addresses.difference(self.initial_addresses)
 697             self.assertEqual(len(new_addresses), 0)
 698
 699         finally:
 700             if address1 is not None:
 701                 self.vapi.ip6_add_del_address_using_prefix(
 702                     sw_if_index=self.pg1.sw_if_index,
 703                     address_with_prefix=address1,
 704                     prefix_group=self.prefix_group, is_add=0)
 705             if address2 is not None:
 706                 self.vapi.ip6_add_del_address_using_prefix(
 707                     sw_if_index=self.pg1.sw_if_index,
 708                     address_with_prefix=address2,
 709                     prefix_group=self.prefix_group, is_add=0)
 710
 711     def test_sending_client_messages_solicit(self):
 712         """ VPP receives messages from DHCPv6 client """
 713
 714         self.wait_for_solicit()
 715         self.send_packet(DHCP6_Solicit)
 716         self.send_packet(DHCP6_Request)
 717         self.send_packet(DHCP6_Renew)
 718         self.send_packet(DHCP6_Rebind)
 719         self.sleep(1)
 720         self.wait_for_solicit(is_resend=True)
 721
 722     def test_sending_inappropriate_packets(self):
 723         """ Server sends messages with inappropriate message types """
 724
 725         self.wait_for_solicit()
 726         self.send_reply()
 727         self.wait_for_solicit(is_resend=True)
 728         self.send_advertise()
 729         self.wait_for_request()
 730         self.send_advertise()
 731         self.wait_for_request(is_resend=True)
 732         self.send_reply()
 733         self.wait_for_renew()
 734
 735     def test_no_prefix_available_in_advertise(self):
 736         """ Advertise message contains NoPrefixAvail status code """
 737
 738         self.wait_for_solicit()
 739         noavail = DHCP6OptStatusCode(statuscode=6)  # NoPrefixAvail
 740         self.send_advertise(iapdopt=noavail)
 741         self.wait_for_solicit(is_resend=True)
 742
 743     def test_preferred_greater_than_valid_lifetime(self):
 744         """ Preferred lifetime is greater than valid lifetime """
 745
 746         address1 = '::2:0:0:0:405/60'
 747         try:
 748             self.vapi.ip6_add_del_address_using_prefix(
 749                 sw_if_index=self.pg1.sw_if_index,
 750                 address_with_prefix=address1,
 751                 prefix_group=self.prefix_group)
 752
 753             self.wait_for_solicit()
 754             self.send_advertise()
 755             self.wait_for_request()
 756             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 757                                           validlft=3)
 758             self.send_reply(iapdopt=ia_pd_opts)
 759
 760             self.sleep(0.5)
 761
 762             # check FIB contains no addresses
 763             fib = self.vapi.ip_route_dump(0, True)
 764             addresses = set(self.get_interface_addresses(fib, self.pg1))
 765             new_addresses = addresses.difference(self.initial_addresses)
 766             self.assertEqual(len(new_addresses), 0)
 767
 768         finally:
 769             self.vapi.ip6_add_del_address_using_prefix(
 770                 sw_if_index=self.pg1.sw_if_index,
 771                 address_with_prefix=address1,
 772                 prefix_group=self.prefix_group,
 773                 is_add=0)
 774
 775     def test_T1_greater_than_T2(self):
 776         """ T1 is greater than T2 """
 777
 778         address1 = '::2:0:0:0:405/60'
 779         try:
 780             self.vapi.ip6_add_del_address_using_prefix(
 781                 sw_if_index=self.pg1.sw_if_index,
 782                 address_with_prefix=address1,
 783                 prefix_group=self.prefix_group)
 784
 785             self.wait_for_solicit()
 786             self.send_advertise()
 787             self.wait_for_request()
 788             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 789                                           validlft=8)
 790             self.send_reply(t1=80, t2=40, iapdopt=ia_pd_opts)
 791
 792             self.sleep(0.5)
 793
 794             # check FIB contains no addresses
 795             fib = self.vapi.ip_route_dump(0, True)
 796             addresses = set(self.get_interface_addresses(fib, self.pg1))
 797             new_addresses = addresses.difference(self.initial_addresses)
 798             self.assertEqual(len(new_addresses), 0)
 799
 800         finally:
 801             self.vapi.ip6_add_del_address_using_prefix(
 802                 sw_if_index=self.pg1.sw_if_index,
 803                 prefix_group=self.prefix_group,
 804                 address_with_prefix=address1,
 805                 is_add=False)