from socket import AF_INET6, inet_ntop, inet_pton from scapy.layers.dhcp6 import ( DHCP6_Advertise, DHCP6OptClientId, DHCP6OptStatusCode, DHCP6OptPref, DHCP6OptIA_PD, DHCP6OptIAPrefix, DHCP6OptServerId, DHCP6_Solicit, DHCP6_Reply, DHCP6_Request, DHCP6_Renew, DHCP6_Rebind, DUID_LL, DHCP6_Release, DHCP6OptElapsedTime, DHCP6OptIA_NA, DHCP6OptIAAddress, ) from scapy.layers.inet6 import IPv6, Ether, UDP from framework import VppTestCase from asfframework import tag_fixme_vpp_workers, tag_run_solo from vpp_papi import VppEnum from config import config import util import os import unittest def ip6_normalize(ip6): return inet_ntop(AF_INET6, inet_pton(AF_INET6, ip6)) @unittest.skipIf("dhcp" in config.excluded_plugins, "Exclude DHCP plugin tests") class TestDHCPv6DataPlane(VppTestCase): """DHCPv6 Data Plane Test Case""" @classmethod def setUpClass(cls): super(TestDHCPv6DataPlane, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestDHCPv6DataPlane, cls).tearDownClass() def setUp(self): super(TestDHCPv6DataPlane, self).setUp() self.create_pg_interfaces(range(1)) self.interfaces = list(self.pg_interfaces) for i in self.interfaces: i.admin_up() i.config_ip6() self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac) def tearDown(self): for i in self.interfaces: i.unconfig_ip6() i.admin_down() super(TestDHCPv6DataPlane, self).tearDown() def test_dhcp_ia_na_send_solicit_receive_advertise(self): """Verify DHCPv6 IA NA Solicit packet and Advertise event""" self.vapi.dhcp6_clients_enable_disable(enable=1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() address = {"address": "1:2:3::5", "preferred_time": 60, "valid_time": 120} self.vapi.dhcp6_send_client_message( server_index=0xFFFFFFFF, mrc=1, msg_type=VppEnum.vl_api_dhcpv6_msg_type_t.DHCPV6_MSG_API_SOLICIT, sw_if_index=self.pg0.sw_if_index, T1=20, T2=40, addresses=[address], n_addresses=len([address]), ) rx_list = self.pg0.get_capture(1) self.assertEqual(len(rx_list), 1) packet = rx_list[0] self.assertEqual(packet.haslayer(IPv6), 1) self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1) client_duid = packet[DHCP6OptClientId].duid trid = packet[DHCP6_Solicit].trid dst = ip6_normalize(packet[IPv6].dst) dst2 = ip6_normalize("ff02::1:2") self.assert_equal(dst, dst2) src = ip6_normalize(packet[IPv6].src) src2 = ip6_normalize(self.pg0.local_ip6_ll) self.assert_equal(src, src2) ia_na = packet[DHCP6OptIA_NA] self.assert_equal(ia_na.T1, 20) self.assert_equal(ia_na.T2, 40) self.assert_equal(len(ia_na.ianaopts), 1) address = ia_na.ianaopts[0] self.assert_equal(address.addr, "1:2:3::5") self.assert_equal(address.preflft, 60) self.assert_equal(address.validlft, 120) self.vapi.want_dhcp6_reply_events(enable_disable=1, pid=os.getpid()) try: ia_na_opts = DHCP6OptIAAddress(addr="7:8::2", preflft=60, validlft=120) p = ( Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IPv6( src=util.mk_ll_addr(self.pg0.remote_mac), dst=self.pg0.local_ip6_ll ) / UDP(sport=547, dport=546) / DHCP6_Advertise(trid=trid) / DHCP6OptServerId(duid=self.server_duid) / DHCP6OptClientId(duid=client_duid) / DHCP6OptPref(prefval=7) / DHCP6OptStatusCode(statuscode=1) / DHCP6OptIA_NA(iaid=1, T1=20, T2=40, ianaopts=ia_na_opts) ) self.pg0.add_stream([p]) self.pg_start() ev = self.vapi.wait_for_event(1, "dhcp6_reply_event") self.assert_equal(ev.preference, 7) self.assert_equal(ev.status_code, 1) self.assert_equal(ev.T1, 20) self.assert_equal(ev.T2, 40) reported_address = ev.addresses[0] address = ia_na_opts.getfieldval("addr") self.assert_equal(str(reported_address.address), address) self.assert_equal( reported_address.preferred_time, ia_na_opts.getfieldval("preflft") ) self.assert_equal( reported_address.valid_time, ia_na_opts.getfieldval("validlft") ) finally: self.vapi.want_dhcp6_reply_events(enable_disable=0) self.vapi.dhcp6_clients_enable_disable(enable=0) def test_dhcp_pd_send_solicit_receive_advertise(self): """Verify DHCPv6 PD Solicit packet and Advertise event""" self.vapi.dhcp6_clients_enable_disable(enable=1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() prefix = { "prefix": {"address": "1:2:3::", "len": 50}, "preferred_time": 60, "valid_time": 120, } prefixes = [prefix] self.vapi.dhcp6_pd_send_client_message( server_index=0xFFFFFFFF, mrc=1, msg_type=VppEnum.vl_api_dhcpv6_msg_type_t.DHCPV6_MSG_API_SOLICIT, sw_if_index=self.pg0.sw_if_index, T1=20, T2=40, prefixes=prefixes, n_prefixes=len(prefixes), ) rx_list = self.pg0.get_capture(1) self.assertEqual(len(rx_list), 1) packet = rx_list[0] self.assertEqual(packet.haslayer(IPv6), 1) self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1) client_duid = packet[DHCP6OptClientId].duid trid = packet[DHCP6_Solicit].trid dst = ip6_normalize(packet[IPv6].dst) dst2 = ip6_normalize("ff02::1:2") self.assert_equal(dst, dst2) src = ip6_normalize(packet[IPv6].src) src2 = ip6_normalize(self.pg0.local_ip6_ll) self.assert_equal(src, src2) ia_pd = packet[DHCP6OptIA_PD] self.assert_equal(ia_pd.T1, 20) self.assert_equal(ia_pd.T2, 40) self.assert_equal(len(ia_pd.iapdopt), 1) prefix = ia_pd.iapdopt[0] self.assert_equal(prefix.prefix, "1:2:3::") self.assert_equal(prefix.plen, 50) self.assert_equal(prefix.preflft, 60) self.assert_equal(prefix.validlft, 120) self.vapi.want_dhcp6_pd_reply_events(enable_disable=1, pid=os.getpid()) try: ia_pd_opts = DHCP6OptIAPrefix( prefix="7:8::", plen=56, preflft=60, validlft=120 ) p = ( Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IPv6( src=util.mk_ll_addr(self.pg0.remote_mac), dst=self.pg0.local_ip6_ll ) / UDP(sport=547, dport=546) / DHCP6_Advertise(trid=trid) / DHCP6OptServerId(duid=self.server_duid) / DHCP6OptClientId(duid=client_duid) / DHCP6OptPref(prefval=7) / DHCP6OptStatusCode(statuscode=1) / DHCP6OptIA_PD(iaid=1, T1=20, T2=40, iapdopt=ia_pd_opts) ) self.pg0.add_stream([p]) self.pg_start() ev = self.vapi.wait_for_event(1, "dhcp6_pd_reply_event") self.assert_equal(ev.preference, 7) self.assert_equal(ev.status_code, 1) self.assert_equal(ev.T1, 20) self.assert_equal(ev.T2, 40) reported_prefix = ev.prefixes[0] prefix = ia_pd_opts.getfieldval("prefix") self.assert_equal(str(reported_prefix.prefix).split("/")[0], prefix) self.assert_equal( int(str(reported_prefix.prefix).split("/")[1]), ia_pd_opts.getfieldval("plen"), ) self.assert_equal( reported_prefix.preferred_time, ia_pd_opts.getfieldval("preflft") ) self.assert_equal( reported_prefix.valid_time, ia_pd_opts.getfieldval("validlft") ) finally: self.vapi.want_dhcp6_pd_reply_events(enable_disable=0) self.vapi.dhcp6_clients_enable_disable(enable=0) @tag_run_solo @unittest.skipIf("dhcp" in config.excluded_plugins, "Exclude DHCP plugin tests") class TestDHCPv6IANAControlPlane(VppTestCase): """DHCPv6 IA NA Control Plane Test Case""" @classmethod def setUpClass(cls): super(TestDHCPv6IANAControlPlane, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestDHCPv6IANAControlPlane, cls).tearDownClass() def setUp(self): super(TestDHCPv6IANAControlPlane, self).setUp() self.create_pg_interfaces(range(1)) self.interfaces = list(self.pg_interfaces) for i in self.interfaces: i.admin_up() self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac) self.client_duid = None self.T1 = 1 self.T2 = 2 fib = self.vapi.ip_route_dump(0, True) self.initial_addresses = set(self.get_interface_addresses(fib, self.pg0)) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.vapi.dhcp6_client_enable_disable( sw_if_index=self.pg0.sw_if_index, enable=1 ) def tearDown(self): self.vapi.dhcp6_client_enable_disable( sw_if_index=self.pg0.sw_if_index, enable=0 ) for i in self.interfaces: i.admin_down() super(TestDHCPv6IANAControlPlane, self).tearDown() @staticmethod def get_interface_addresses(fib, pg): lst = [] for entry in fib: if entry.route.prefix.prefixlen == 128: path = entry.route.paths[0] if path.sw_if_index == pg.sw_if_index: lst.append(str(entry.route.prefix.network_address)) return lst def get_addresses(self): fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg0)) return addresses.difference(self.initial_addresses) def validate_duid_ll(self, duid): DUID_LL(bytes(duid)) def validate_packet(self, packet, msg_type, is_resend=False): try: self.assertEqual(packet.haslayer(msg_type), 1) client_duid = packet[DHCP6OptClientId].duid if self.client_duid is None: self.client_duid = client_duid self.validate_duid_ll(client_duid) else: self.assertEqual(self.client_duid, client_duid) if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind: server_duid = packet[DHCP6OptServerId].duid self.assertEqual(server_duid, self.server_duid) if is_resend: self.assertEqual(self.trid, packet[msg_type].trid) else: self.trid = packet[msg_type].trid ip = packet[IPv6] udp = packet[UDP] self.assertEqual(ip.dst, "ff02::1:2") self.assertEqual(udp.sport, 546) self.assertEqual(udp.dport, 547) dhcpv6 = packet[msg_type] elapsed_time = dhcpv6[DHCP6OptElapsedTime] if is_resend: self.assertNotEqual(elapsed_time.elapsedtime, 0) else: self.assertEqual(elapsed_time.elapsedtime, 0) except BaseException: packet.show() raise def wait_for_packet(self, msg_type, timeout=None, is_resend=False): if timeout is None: timeout = 3 rx_list = self.pg0.get_capture(1, timeout=timeout) packet = rx_list[0] self.validate_packet(packet, msg_type, is_resend=is_resend) def wait_for_solicit(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend) def wait_for_request(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend) def wait_for_renew(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend) def wait_for_rebind(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend) def wait_for_release(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend) def send_packet(self, msg_type, t1=None, t2=None, ianaopts=None): if t1 is None: t1 = self.T1 if t2 is None: t2 = self.T2 if ianaopts is None: opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2) else: opt_ia_na = DHCP6OptIA_NA(iaid=1, T1=t1, T2=t2, ianaopts=ianaopts) p = ( Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IPv6(src=util.mk_ll_addr(self.pg0.remote_mac), dst=self.pg0.local_ip6_ll) / UDP(sport=547, dport=546) / msg_type(trid=self.trid) / DHCP6OptServerId(duid=self.server_duid) / DHCP6OptClientId(duid=self.client_duid) / opt_ia_na ) self.pg0.add_stream([p]) self.pg_enable_capture(self.pg_interfaces) self.pg_start() def send_advertise(self, t1=None, t2=None, ianaopts=None): self.send_packet(DHCP6_Advertise, t1, t2, ianaopts) def send_reply(self, t1=None, t2=None, ianaopts=None): self.send_packet(DHCP6_Reply, t1, t2, ianaopts) def test_T1_and_T2_timeouts(self): """Test T1 and T2 timeouts""" self.wait_for_solicit() self.send_advertise() self.wait_for_request() self.send_reply() self.sleep(1) self.wait_for_renew() self.pg_enable_capture(self.pg_interfaces) self.sleep(1) self.wait_for_rebind() def test_addresses(self): """Test handling of addresses""" ia_na_opts = DHCP6OptIAAddress(addr="7:8::2", preflft=1, validlft=2) self.wait_for_solicit() self.send_advertise(t1=20, t2=40, ianaopts=ia_na_opts) self.wait_for_request() self.send_reply(t1=20, t2=40, ianaopts=ia_na_opts) self.sleep(0.1) # check FIB for new address new_addresses = self.get_addresses() self.assertEqual(len(new_addresses), 1) addr = list(new_addresses)[0] self.assertEqual(addr, "7:8::2") self.sleep(2) # check that the address is deleted fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg0)) new_addresses = addresses.difference(self.initial_addresses) self.assertEqual(len(new_addresses), 0) def test_sending_client_messages_solicit(self): """VPP receives messages from DHCPv6 client""" self.wait_for_solicit() self.send_packet(DHCP6_Solicit) self.send_packet(DHCP6_Request) self.send_packet(DHCP6_Renew) self.send_packet(DHCP6_Rebind) self.sleep(1) self.wait_for_solicit(is_resend=True) def test_sending_inappropriate_packets(self): """Server sends messages with inappropriate message types""" self.wait_for_solicit() self.send_reply() self.wait_for_solicit(is_resend=True) self.send_advertise() self.wait_for_request() self.send_advertise() self.wait_for_request(is_resend=True) self.send_reply() self.wait_for_renew() def test_no_address_available_in_advertise(self): """Advertise message contains NoAddrsAvail status code""" self.wait_for_solicit() noavail = DHCP6OptStatusCode(statuscode=2) # NoAddrsAvail self.send_advertise(ianaopts=noavail) self.wait_for_solicit(is_resend=True) def test_preferred_greater_than_valid_lifetime(self): """Preferred lifetime is greater than valid lifetime""" self.wait_for_solicit() self.send_advertise() self.wait_for_request() ia_na_opts = DHCP6OptIAAddress(addr="7:8::2", preflft=4, validlft=3) self.send_reply(ianaopts=ia_na_opts) self.sleep(0.5) # check FIB contains no addresses fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg0)) new_addresses = addresses.difference(self.initial_addresses) self.assertEqual(len(new_addresses), 0) def test_T1_greater_than_T2(self): """T1 is greater than T2""" self.wait_for_solicit() self.send_advertise() self.wait_for_request() ia_na_opts = DHCP6OptIAAddress(addr="7:8::2", preflft=4, validlft=8) self.send_reply(t1=80, t2=40, ianaopts=ia_na_opts) self.sleep(0.5) # check FIB contains no addresses fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg0)) new_addresses = addresses.difference(self.initial_addresses) self.assertEqual(len(new_addresses), 0) @tag_fixme_vpp_workers @unittest.skipIf("dhcp" in config.excluded_plugins, "Exclude DHCP plugin tests") class TestDHCPv6PDControlPlane(VppTestCase): """DHCPv6 PD Control Plane Test Case""" @classmethod def setUpClass(cls): super(TestDHCPv6PDControlPlane, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestDHCPv6PDControlPlane, cls).tearDownClass() def setUp(self): super(TestDHCPv6PDControlPlane, self).setUp() self.create_pg_interfaces(range(2)) self.interfaces = list(self.pg_interfaces) for i in self.interfaces: i.admin_up() self.server_duid = DUID_LL(lladdr=self.pg0.remote_mac) self.client_duid = None self.T1 = 1 self.T2 = 2 fib = self.vapi.ip_route_dump(0, True) self.initial_addresses = set(self.get_interface_addresses(fib, self.pg1)) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.prefix_group = "my-pd-prefix-group" self.vapi.dhcp6_pd_client_enable_disable( enable=1, sw_if_index=self.pg0.sw_if_index, prefix_group=self.prefix_group ) def tearDown(self): self.vapi.dhcp6_pd_client_enable_disable(self.pg0.sw_if_index, enable=0) for i in self.interfaces: i.admin_down() super(TestDHCPv6PDControlPlane, self).tearDown() @staticmethod def get_interface_addresses(fib, pg): lst = [] for entry in fib: if entry.route.prefix.prefixlen == 128: path = entry.route.paths[0] if path.sw_if_index == pg.sw_if_index: lst.append(str(entry.route.prefix.network_address)) return lst def get_addresses(self): fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg1)) return addresses.difference(self.initial_addresses) def validate_duid_ll(self, duid): DUID_LL(bytes(duid)) def validate_packet(self, packet, msg_type, is_resend=False): try: self.assertEqual(packet.haslayer(msg_type), 1) client_duid = packet[DHCP6OptClientId].duid if self.client_duid is None: self.client_duid = client_duid self.validate_duid_ll(client_duid) else: self.assertEqual(self.client_duid, client_duid) if msg_type != DHCP6_Solicit and msg_type != DHCP6_Rebind: server_duid = packet[DHCP6OptServerId].duid self.assertEqual(server_duid, self.server_duid) if is_resend: self.assertEqual(self.trid, packet[msg_type].trid) else: self.trid = packet[msg_type].trid ip = packet[IPv6] udp = packet[UDP] self.assertEqual(ip.dst, "ff02::1:2") self.assertEqual(udp.sport, 546) self.assertEqual(udp.dport, 547) dhcpv6 = packet[msg_type] elapsed_time = dhcpv6[DHCP6OptElapsedTime] if is_resend: self.assertNotEqual(elapsed_time.elapsedtime, 0) else: self.assertEqual(elapsed_time.elapsedtime, 0) except BaseException: packet.show() raise def wait_for_packet(self, msg_type, timeout=None, is_resend=False): if timeout is None: timeout = 3 rx_list = self.pg0.get_capture(1, timeout=timeout) packet = rx_list[0] self.validate_packet(packet, msg_type, is_resend=is_resend) def wait_for_solicit(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Solicit, timeout, is_resend=is_resend) def wait_for_request(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Request, timeout, is_resend=is_resend) def wait_for_renew(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Renew, timeout, is_resend=is_resend) def wait_for_rebind(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Rebind, timeout, is_resend=is_resend) def wait_for_release(self, timeout=None, is_resend=False): self.wait_for_packet(DHCP6_Release, timeout, is_resend=is_resend) def send_packet(self, msg_type, t1=None, t2=None, iapdopt=None): if t1 is None: t1 = self.T1 if t2 is None: t2 = self.T2 if iapdopt is None: opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2) else: opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2, iapdopt=iapdopt) p = ( Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IPv6(src=util.mk_ll_addr(self.pg0.remote_mac), dst=self.pg0.local_ip6_ll) / UDP(sport=547, dport=546) / msg_type(trid=self.trid) / DHCP6OptServerId(duid=self.server_duid) / DHCP6OptClientId(duid=self.client_duid) / opt_ia_pd ) self.pg0.add_stream([p]) self.pg_enable_capture(self.pg_interfaces) self.pg_start() def send_advertise(self, t1=None, t2=None, iapdopt=None): self.send_packet(DHCP6_Advertise, t1, t2, iapdopt) def send_reply(self, t1=None, t2=None, iapdopt=None): self.send_packet(DHCP6_Reply, t1, t2, iapdopt) def test_T1_and_T2_timeouts(self): """Test T1 and T2 timeouts""" self.wait_for_solicit() self.send_advertise() self.wait_for_request() self.send_reply() self.sleep(1) self.wait_for_renew() self.pg_enable_capture(self.pg_interfaces) self.sleep(1) self.wait_for_rebind() def test_prefixes(self): """Test handling of prefixes""" address1 = "::2:0:0:0:405/60" address2 = "::76:0:0:0:406/62" try: self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, address_with_prefix=address1, prefix_group=self.prefix_group, ) ia_pd_opts = DHCP6OptIAPrefix( prefix="7:8::", plen=56, preflft=2, validlft=3 ) self.wait_for_solicit() self.send_advertise(t1=20, t2=40, iapdopt=ia_pd_opts) self.wait_for_request() self.send_reply(t1=20, t2=40, iapdopt=ia_pd_opts) self.sleep(0.1) # check FIB for new address new_addresses = self.get_addresses() self.assertEqual(len(new_addresses), 1) addr = list(new_addresses)[0] self.assertEqual(addr, "7:8:0:2::405") self.sleep(1) self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, address_with_prefix=address2, prefix_group=self.prefix_group, ) self.sleep(1) # check FIB contains 2 addresses fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg1)) new_addresses = addresses.difference(self.initial_addresses) self.assertEqual(len(new_addresses), 2) addr1 = list(new_addresses)[0] addr2 = list(new_addresses)[1] if addr1 == "7:8:0:76::406": addr1, addr2 = addr2, addr1 self.assertEqual(addr1, "7:8:0:2::405") self.assertEqual(addr2, "7:8:0:76::406") self.sleep(1) # check that the addresses are deleted fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg1)) new_addresses = addresses.difference(self.initial_addresses) self.assertEqual(len(new_addresses), 0) finally: if address1 is not None: self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, address_with_prefix=address1, prefix_group=self.prefix_group, is_add=0, ) if address2 is not None: self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, address_with_prefix=address2, prefix_group=self.prefix_group, is_add=0, ) def test_sending_client_messages_solicit(self): """VPP receives messages from DHCPv6 client""" self.wait_for_solicit() self.send_packet(DHCP6_Solicit) self.send_packet(DHCP6_Request) self.send_packet(DHCP6_Renew) self.send_packet(DHCP6_Rebind) self.sleep(1) self.wait_for_solicit(is_resend=True) def test_sending_inappropriate_packets(self): """Server sends messages with inappropriate message types""" self.wait_for_solicit() self.send_reply() self.wait_for_solicit(is_resend=True) self.send_advertise() self.wait_for_request() self.send_advertise() self.wait_for_request(is_resend=True) self.send_reply() self.wait_for_renew() def test_no_prefix_available_in_advertise(self): """Advertise message contains NoPrefixAvail status code""" self.wait_for_solicit() noavail = DHCP6OptStatusCode(statuscode=6) # NoPrefixAvail self.send_advertise(iapdopt=noavail) self.wait_for_solicit(is_resend=True) def test_preferred_greater_than_valid_lifetime(self): """Preferred lifetime is greater than valid lifetime""" address1 = "::2:0:0:0:405/60" try: self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, address_with_prefix=address1, prefix_group=self.prefix_group, ) self.wait_for_solicit() self.send_advertise() self.wait_for_request() ia_pd_opts = DHCP6OptIAPrefix( prefix="7:8::", plen=56, preflft=4, validlft=3 ) self.send_reply(iapdopt=ia_pd_opts) self.sleep(0.5) # check FIB contains no addresses fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg1)) new_addresses = addresses.difference(self.initial_addresses) self.assertEqual(len(new_addresses), 0) finally: self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, address_with_prefix=address1, prefix_group=self.prefix_group, is_add=0, ) def test_T1_greater_than_T2(self): """T1 is greater than T2""" address1 = "::2:0:0:0:405/60" try: self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, address_with_prefix=address1, prefix_group=self.prefix_group, ) self.wait_for_solicit() self.send_advertise() self.wait_for_request() ia_pd_opts = DHCP6OptIAPrefix( prefix="7:8::", plen=56, preflft=4, validlft=8 ) self.send_reply(t1=80, t2=40, iapdopt=ia_pd_opts) self.sleep(0.5) # check FIB contains no addresses fib = self.vapi.ip_route_dump(0, True) addresses = set(self.get_interface_addresses(fib, self.pg1)) new_addresses = addresses.difference(self.initial_addresses) self.assertEqual(len(new_addresses), 0) finally: self.vapi.ip6_add_del_address_using_prefix( sw_if_index=self.pg1.sw_if_index, prefix_group=self.prefix_group, address_with_prefix=address1, is_add=False, )