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 setUpClass(cls):
 228         super(TestDHCPv6IANAControlPlane, cls).setUpClass()
 229
 230     @classmethod
 231     def tearDownClass(cls):
 232         super(TestDHCPv6IANAControlPlane, cls).tearDownClass()
 233
 234     def setUp(self):
 235         super(TestDHCPv6IANAControlPlane, self).setUp()
 236
 237         self.create_pg_interfaces(range(1))
 238         self.interfaces = list(self.pg_interfaces)
 239         for i in self.interfaces:
 240             i.admin_up()
 241
 242         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 243         self.client_duid = None
 244         self.T1 = 1
 245         self.T2 = 2
 246
 247         fib = self.vapi.ip_route_dump(0, True)
 248         self.initial_addresses = set(self.get_interface_addresses(fib,
 249                                                                   self.pg0))
 250
 251         self.pg_enable_capture(self.pg_interfaces)
 252         self.pg_start()
 253
 254         self.vapi.dhcp6_client_enable_disable(sw_if_index=self.pg0.sw_if_index,
 255                                               enable=1)
 256
 257     def tearDown(self):
 258         self.vapi.dhcp6_client_enable_disable(sw_if_index=self.pg0.sw_if_index,
 259                                               enable=0)
 260
 261         for i in self.interfaces:
 262             i.admin_down()
 263
 264         super(TestDHCPv6IANAControlPlane, self).tearDown()
 265
 266     @staticmethod
 267     def get_interface_addresses(fib, pg):
 268         lst = []
 269         for entry in fib:
 270             if entry.route.prefix.prefixlen == 128:
 271                 path = entry.route.paths[0]
 272                 if path.sw_if_index == pg.sw_if_index:
 273                     lst.append(str(entry.route.prefix.network_address))
 274         return lst
 275
 276     def get_addresses(self):
 277         fib = self.vapi.ip_route_dump(0, True)
 278         addresses = set(self.get_interface_addresses(fib, self.pg0))
 279         return addresses.difference(self.initial_addresses)
 280
 281     def validate_duid_ll(self, duid):
 282         DUID_LL(duid)
 283
 284     def validate_packet(self, packet, msg_type, is_resend=False):
 285         try:
 286             self.assertEqual(packet.haslayer(msg_type), 1)
 287             client_duid = packet[DHCP6OptClientId].duid
 288             if self.client_duid is None:
 289                 self.client_duid = client_duid
 290                 self.validate_duid_ll(client_duid)
 291             else:
 292                 self.assertEqual(self.client_duid, client_duid)
 293             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 294                 server_duid = packet[DHCP6OptServerId].duid
 295                 self.assertEqual(server_duid, self.server_duid)
 296             if is_resend:
 297                 self.assertEqual(self.trid, packet[msg_type].trid)
 298             else:
 299                 self.trid = packet[msg_type].trid
 300             ip = packet[IPv6]
 301             udp = packet[UDP]
 302             self.assertEqual(ip.dst, 'ff02::1:2')
 303             self.assertEqual(udp.sport, 546)
 304             self.assertEqual(udp.dport, 547)
 305             dhcpv6 = packet[msg_type]
 306             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 307             if (is_resend):
 308                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 309             else:
 310                 self.assertEqual(elapsed_time.elapsedtime, 0)
 311         except BaseException:
 312             packet.show()
 313             raise
 314
 315     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 316         if timeout is None:
 317             timeout = 3
 318         rx_list = self.pg0.get_capture(1, timeout=timeout)
 319         packet = rx_list[0]
 320         self.validate_packet(packet, msg_type, is_resend=is_resend)
 321
 322     def wait_for_solicit(self, timeout=None, is_resend=False):
 323         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 324
 325     def wait_for_request(self, timeout=None, is_resend=False):
 326         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 327
 328     def wait_for_renew(self, timeout=None, is_resend=False):
 329         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 330
 331     def wait_for_rebind(self, timeout=None, is_resend=False):
 332         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 333
 334     def wait_for_release(self, timeout=None, is_resend=False):
 335         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 336
 337     def send_packet(self, msg_type, t1=None, t2=None, ianaopts=None):
 338         if t1 is None:
 339             t1 = self.T1
 340         if t2 is None:
 341             t2 = self.T2
 342         if ianaopts is None:
 343             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2)
 344         else:
 345             opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2, ianaopts=ianaopts)
 346         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 347              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 348                   dst=self.pg0.local_ip6_ll) /
 349              UDP(sport=547, dport=546) /
 350              msg_type(trid=self.trid) /
 351              DHCP6OptServerId(duid=self.server_duid) /
 352              DHCP6OptClientId(duid=self.client_duid) /
 353              opt_ia_na
 354              )
 355         self.pg0.add_stream([p])
 356         self.pg_enable_capture(self.pg_interfaces)
 357         self.pg_start()
 358
 359     def send_advertise(self, t1=None, t2=None, ianaopts=None):
 360         self.send_packet(DHCP6_Advertise, t1, t2, ianaopts)
 361
 362     def send_reply(self, t1=None, t2=None, ianaopts=None):
 363         self.send_packet(DHCP6_Reply, t1, t2, ianaopts)
 364
 365     def test_T1_and_T2_timeouts(self):
 366         """ Test T1 and T2 timeouts """
 367
 368         self.wait_for_solicit()
 369         self.send_advertise()
 370         self.wait_for_request()
 371         self.send_reply()
 372
 373         self.sleep(1)
 374
 375         self.wait_for_renew()
 376
 377         self.pg_enable_capture(self.pg_interfaces)
 378
 379         self.sleep(1)
 380
 381         self.wait_for_rebind()
 382
 383     def test_addresses(self):
 384         """ Test handling of addresses """
 385
 386         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=1,
 387                                        validlft=2)
 388
 389         self.wait_for_solicit()
 390         self.send_advertise(t1=20, t2=40, ianaopts=ia_na_opts)
 391         self.wait_for_request()
 392         self.send_reply(t1=20, t2=40, ianaopts=ia_na_opts)
 393         self.sleep(0.1)
 394
 395         # check FIB for new address
 396         new_addresses = self.get_addresses()
 397         self.assertEqual(len(new_addresses), 1)
 398         addr = list(new_addresses)[0]
 399         self.assertEqual(addr, '7:8::2')
 400
 401         self.sleep(2)
 402
 403         # check that the address is deleted
 404         fib = self.vapi.ip_route_dump(0, True)
 405         addresses = set(self.get_interface_addresses(fib, self.pg0))
 406         new_addresses = addresses.difference(self.initial_addresses)
 407         self.assertEqual(len(new_addresses), 0)
 408
 409     def test_sending_client_messages_solicit(self):
 410         """ VPP receives messages from DHCPv6 client """
 411
 412         self.wait_for_solicit()
 413         self.send_packet(DHCP6_Solicit)
 414         self.send_packet(DHCP6_Request)
 415         self.send_packet(DHCP6_Renew)
 416         self.send_packet(DHCP6_Rebind)
 417         self.sleep(1)
 418         self.wait_for_solicit(is_resend=True)
 419
 420     def test_sending_inappropriate_packets(self):
 421         """ Server sends messages with inappropriate message types """
 422
 423         self.wait_for_solicit()
 424         self.send_reply()
 425         self.wait_for_solicit(is_resend=True)
 426         self.send_advertise()
 427         self.wait_for_request()
 428         self.send_advertise()
 429         self.wait_for_request(is_resend=True)
 430         self.send_reply()
 431         self.wait_for_renew()
 432
 433     def test_no_address_available_in_advertise(self):
 434         """ Advertise message contains NoAddrsAvail status code """
 435
 436         self.wait_for_solicit()
 437         noavail = DHCP6OptStatusCode(statuscode=2)  # NoAddrsAvail
 438         self.send_advertise(ianaopts=noavail)
 439         self.wait_for_solicit(is_resend=True)
 440
 441     def test_preferred_greater_than_valid_lifetime(self):
 442         """ Preferred lifetime is greater than valid lifetime """
 443
 444         self.wait_for_solicit()
 445         self.send_advertise()
 446         self.wait_for_request()
 447         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=3)
 448         self.send_reply(ianaopts=ia_na_opts)
 449
 450         self.sleep(0.5)
 451
 452         # check FIB contains no addresses
 453         fib = self.vapi.ip_route_dump(0, True)
 454         addresses = set(self.get_interface_addresses(fib, self.pg0))
 455         new_addresses = addresses.difference(self.initial_addresses)
 456         self.assertEqual(len(new_addresses), 0)
 457
 458     def test_T1_greater_than_T2(self):
 459         """ T1 is greater than T2 """
 460
 461         self.wait_for_solicit()
 462         self.send_advertise()
 463         self.wait_for_request()
 464         ia_na_opts = DHCP6OptIAAddress(addr='7:8::2', preflft=4, validlft=8)
 465         self.send_reply(t1=80, t2=40, ianaopts=ia_na_opts)
 466
 467         self.sleep(0.5)
 468
 469         # check FIB contains no addresses
 470         fib = self.vapi.ip_route_dump(0, True)
 471         addresses = set(self.get_interface_addresses(fib, self.pg0))
 472         new_addresses = addresses.difference(self.initial_addresses)
 473         self.assertEqual(len(new_addresses), 0)
 474
 475
 476 class TestDHCPv6PDControlPlane(VppTestCase):
 477     """ DHCPv6 PD Control Plane Test Case """
 478
 479     @classmethod
 480     def setUpClass(cls):
 481         super(TestDHCPv6PDControlPlane, cls).setUpClass()
 482
 483     @classmethod
 484     def tearDownClass(cls):
 485         super(TestDHCPv6PDControlPlane, cls).tearDownClass()
 486
 487     def setUp(self):
 488         super(TestDHCPv6PDControlPlane, self).setUp()
 489
 490         self.create_pg_interfaces(range(2))
 491         self.interfaces = list(self.pg_interfaces)
 492         for i in self.interfaces:
 493             i.admin_up()
 494
 495         self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac)
 496         self.client_duid = None
 497         self.T1 = 1
 498         self.T2 = 2
 499
 500         fib = self.vapi.ip_route_dump(0, True)
 501         self.initial_addresses = set(self.get_interface_addresses(fib,
 502                                                                   self.pg1))
 503
 504         self.pg_enable_capture(self.pg_interfaces)
 505         self.pg_start()
 506
 507         self.prefix_group = 'my-pd-prefix-group'
 508
 509         self.vapi.dhcp6_pd_client_enable_disable(
 510             enable=1,
 511             sw_if_index=self.pg0.sw_if_index,
 512             prefix_group=self.prefix_group)
 513
 514     def tearDown(self):
 515         self.vapi.dhcp6_pd_client_enable_disable(self.pg0.sw_if_index,
 516                                                  enable=0)
 517
 518         for i in self.interfaces:
 519             i.admin_down()
 520
 521         super(TestDHCPv6PDControlPlane, self).tearDown()
 522
 523     @staticmethod
 524     def get_interface_addresses(fib, pg):
 525         lst = []
 526         for entry in fib:
 527             if entry.route.prefix.prefixlen == 128:
 528                 path = entry.route.paths[0]
 529                 if path.sw_if_index == pg.sw_if_index:
 530                     lst.append(str(entry.route.prefix.network_address))
 531         return lst
 532
 533     def get_addresses(self):
 534         fib = self.vapi.ip_route_dump(0, True)
 535         addresses = set(self.get_interface_addresses(fib, self.pg1))
 536         return addresses.difference(self.initial_addresses)
 537
 538     def validate_duid_ll(self, duid):
 539         DUID_LL(duid)
 540
 541     def validate_packet(self, packet, msg_type, is_resend=False):
 542         try:
 543             self.assertEqual(packet.haslayer(msg_type), 1)
 544             client_duid = packet[DHCP6OptClientId].duid
 545             if self.client_duid is None:
 546                 self.client_duid = client_duid
 547                 self.validate_duid_ll(client_duid)
 548             else:
 549                 self.assertEqual(self.client_duid, client_duid)
 550             if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind:
 551                 server_duid = packet[DHCP6OptServerId].duid
 552                 self.assertEqual(server_duid, self.server_duid)
 553             if is_resend:
 554                 self.assertEqual(self.trid, packet[msg_type].trid)
 555             else:
 556                 self.trid = packet[msg_type].trid
 557             ip = packet[IPv6]
 558             udp = packet[UDP]
 559             self.assertEqual(ip.dst, 'ff02::1:2')
 560             self.assertEqual(udp.sport, 546)
 561             self.assertEqual(udp.dport, 547)
 562             dhcpv6 = packet[msg_type]
 563             elapsed_time = dhcpv6[DHCP6OptElapsedTime]
 564             if (is_resend):
 565                 self.assertNotEqual(elapsed_time.elapsedtime, 0)
 566             else:
 567                 self.assertEqual(elapsed_time.elapsedtime, 0)
 568         except BaseException:
 569             packet.show()
 570             raise
 571
 572     def wait_for_packet(self, msg_type, timeout=None, is_resend=False):
 573         if timeout is None:
 574             timeout = 3
 575         rx_list = self.pg0.get_capture(1, timeout=timeout)
 576         packet = rx_list[0]
 577         self.validate_packet(packet, msg_type, is_resend=is_resend)
 578
 579     def wait_for_solicit(self, timeout=None, is_resend=False):
 580         self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend)
 581
 582     def wait_for_request(self, timeout=None, is_resend=False):
 583         self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend)
 584
 585     def wait_for_renew(self, timeout=None, is_resend=False):
 586         self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend)
 587
 588     def wait_for_rebind(self, timeout=None, is_resend=False):
 589         self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend)
 590
 591     def wait_for_release(self, timeout=None, is_resend=False):
 592         self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend)
 593
 594     def send_packet(self, msg_type, t1=None, t2=None, iapdopt=None):
 595         if t1 is None:
 596             t1 = self.T1
 597         if t2 is None:
 598             t2 = self.T2
 599         if iapdopt is None:
 600             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2)
 601         else:
 602             opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2, iapdopt=iapdopt)
 603         p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 604              IPv6(src=util.mk_ll_addr(self.pg0.remote_mac),
 605                   dst=self.pg0.local_ip6_ll) /
 606              UDP(sport=547, dport=546) /
 607              msg_type(trid=self.trid) /
 608              DHCP6OptServerId(duid=self.server_duid) /
 609              DHCP6OptClientId(duid=self.client_duid) /
 610              opt_ia_pd
 611              )
 612         self.pg0.add_stream([p])
 613         self.pg_enable_capture(self.pg_interfaces)
 614         self.pg_start()
 615
 616     def send_advertise(self, t1=None, t2=None, iapdopt=None):
 617         self.send_packet(DHCP6_Advertise, t1, t2, iapdopt)
 618
 619     def send_reply(self, t1=None, t2=None, iapdopt=None):
 620         self.send_packet(DHCP6_Reply, t1, t2, iapdopt)
 621
 622     def test_T1_and_T2_timeouts(self):
 623         """ Test T1 and T2 timeouts """
 624
 625         self.wait_for_solicit()
 626         self.send_advertise()
 627         self.wait_for_request()
 628         self.send_reply()
 629
 630         self.sleep(1)
 631
 632         self.wait_for_renew()
 633
 634         self.pg_enable_capture(self.pg_interfaces)
 635
 636         self.sleep(1)
 637
 638         self.wait_for_rebind()
 639
 640     def test_prefixes(self):
 641         """ Test handling of prefixes """
 642
 643         address1 = '::2:0:0:0:405/60'
 644         address2 = '::76:0:0:0:406/62'
 645         try:
 646             self.vapi.ip6_add_del_address_using_prefix(
 647                 sw_if_index=self.pg1.sw_if_index,
 648                 address_with_prefix=address1,
 649                 prefix_group=self.prefix_group)
 650
 651             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=2,
 652                                           validlft=3)
 653
 654             self.wait_for_solicit()
 655             self.send_advertise(t1=20, t2=40, iapdopt=ia_pd_opts)
 656             self.wait_for_request()
 657             self.send_reply(t1=20, t2=40, iapdopt=ia_pd_opts)
 658             self.sleep(0.1)
 659
 660             # check FIB for new address
 661             new_addresses = self.get_addresses()
 662             self.assertEqual(len(new_addresses), 1)
 663             addr = list(new_addresses)[0]
 664             self.assertEqual(addr, '7:8:0:2::405')
 665
 666             self.sleep(1)
 667
 668             self.vapi.ip6_add_del_address_using_prefix(
 669                 sw_if_index=self.pg1.sw_if_index,
 670                 address_with_prefix=address2,
 671                 prefix_group=self.prefix_group)
 672
 673             self.sleep(1)
 674
 675             # check FIB contains 2 addresses
 676             fib = self.vapi.ip_route_dump(0, True)
 677             addresses = set(self.get_interface_addresses(fib, self.pg1))
 678             new_addresses = addresses.difference(self.initial_addresses)
 679             self.assertEqual(len(new_addresses), 2)
 680             addr1 = list(new_addresses)[0]
 681             addr2 = list(new_addresses)[1]
 682             if addr1 == '7:8:0:76::406':
 683                 addr1, addr2 = addr2, addr1
 684             self.assertEqual(addr1, '7:8:0:2::405')
 685             self.assertEqual(addr2, '7:8:0:76::406')
 686
 687             self.sleep(1)
 688
 689             # check that the addresses are deleted
 690             fib = self.vapi.ip_route_dump(0, True)
 691             addresses = set(self.get_interface_addresses(fib, self.pg1))
 692             new_addresses = addresses.difference(self.initial_addresses)
 693             self.assertEqual(len(new_addresses), 0)
 694
 695         finally:
 696             if address1 is not None:
 697                 self.vapi.ip6_add_del_address_using_prefix(
 698                     sw_if_index=self.pg1.sw_if_index,
 699                     address_with_prefix=address1,
 700                     prefix_group=self.prefix_group, is_add=0)
 701             if address2 is not None:
 702                 self.vapi.ip6_add_del_address_using_prefix(
 703                     sw_if_index=self.pg1.sw_if_index,
 704                     address_with_prefix=address2,
 705                     prefix_group=self.prefix_group, is_add=0)
 706
 707     def test_sending_client_messages_solicit(self):
 708         """ VPP receives messages from DHCPv6 client """
 709
 710         self.wait_for_solicit()
 711         self.send_packet(DHCP6_Solicit)
 712         self.send_packet(DHCP6_Request)
 713         self.send_packet(DHCP6_Renew)
 714         self.send_packet(DHCP6_Rebind)
 715         self.sleep(1)
 716         self.wait_for_solicit(is_resend=True)
 717
 718     def test_sending_inappropriate_packets(self):
 719         """ Server sends messages with inappropriate message types """
 720
 721         self.wait_for_solicit()
 722         self.send_reply()
 723         self.wait_for_solicit(is_resend=True)
 724         self.send_advertise()
 725         self.wait_for_request()
 726         self.send_advertise()
 727         self.wait_for_request(is_resend=True)
 728         self.send_reply()
 729         self.wait_for_renew()
 730
 731     def test_no_prefix_available_in_advertise(self):
 732         """ Advertise message contains NoPrefixAvail status code """
 733
 734         self.wait_for_solicit()
 735         noavail = DHCP6OptStatusCode(statuscode=6)  # NoPrefixAvail
 736         self.send_advertise(iapdopt=noavail)
 737         self.wait_for_solicit(is_resend=True)
 738
 739     def test_preferred_greater_than_valid_lifetime(self):
 740         """ Preferred lifetime is greater than valid lifetime """
 741
 742         address1 = '::2:0:0:0:405/60'
 743         try:
 744             self.vapi.ip6_add_del_address_using_prefix(
 745                 sw_if_index=self.pg1.sw_if_index,
 746                 address_with_prefix=address1,
 747                 prefix_group=self.prefix_group)
 748
 749             self.wait_for_solicit()
 750             self.send_advertise()
 751             self.wait_for_request()
 752             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 753                                           validlft=3)
 754             self.send_reply(iapdopt=ia_pd_opts)
 755
 756             self.sleep(0.5)
 757
 758             # check FIB contains no addresses
 759             fib = self.vapi.ip_route_dump(0, True)
 760             addresses = set(self.get_interface_addresses(fib, self.pg1))
 761             new_addresses = addresses.difference(self.initial_addresses)
 762             self.assertEqual(len(new_addresses), 0)
 763
 764         finally:
 765             self.vapi.ip6_add_del_address_using_prefix(
 766                 sw_if_index=self.pg1.sw_if_index,
 767                 address_with_prefix=address1,
 768                 prefix_group=self.prefix_group,
 769                 is_add=0)
 770
 771     def test_T1_greater_than_T2(self):
 772         """ T1 is greater than T2 """
 773
 774         address1 = '::2:0:0:0:405/60'
 775         try:
 776             self.vapi.ip6_add_del_address_using_prefix(
 777                 sw_if_index=self.pg1.sw_if_index,
 778                 address_with_prefix=address1,
 779                 prefix_group=self.prefix_group)
 780
 781             self.wait_for_solicit()
 782             self.send_advertise()
 783             self.wait_for_request()
 784             ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=4,
 785                                           validlft=8)
 786             self.send_reply(t1=80, t2=40, iapdopt=ia_pd_opts)
 787
 788             self.sleep(0.5)
 789
 790             # check FIB contains no addresses
 791             fib = self.vapi.ip_route_dump(0, True)
 792             addresses = set(self.get_interface_addresses(fib, self.pg1))
 793             new_addresses = addresses.difference(self.initial_addresses)
 794             self.assertEqual(len(new_addresses), 0)
 795
 796         finally:
 797             self.vapi.ip6_add_del_address_using_prefix(
 798                 sw_if_index=self.pg1.sw_if_index,
 799                 prefix_group=self.prefix_group,
 800                 address_with_prefix=address1,
 801                 is_add=False)