test/test_ipsec_tun_if_esp.py

import unittest
import socket
import copy

from scapy.layers.ipsec import ESP
from scapy.layers.l2 import Ether, Raw, GRE
from scapy.layers.inet import IP, UDP
from scapy.layers.inet6 import IPv6
from framework import VppTestRunner
from template_ipsec import TemplateIpsec, IpsecTun4Tests, IpsecTun6Tests, \
    IpsecTun4, IpsecTun6,  IpsecTcpTests,  config_tun_params
from vpp_ipsec_tun_interface import VppIpsecTunInterface
from vpp_gre_interface import VppGreInterface
from vpp_ipip_tun_interface import VppIpIpTunInterface
from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto
from vpp_ipsec import VppIpsecSA, VppIpsecTunProtect
from vpp_l2 import VppBridgeDomain, VppBridgeDomainPort
from util import ppp
from vpp_papi import VppEnum


class TemplateIpsec4TunIfEsp(TemplateIpsec):
    """ IPsec tunnel interface tests """

    encryption_type = ESP

    @classmethod
    def setUpClass(cls):
        super(TemplateIpsec4TunIfEsp, cls).setUpClass()

    @classmethod
    def tearDownClass(cls):
        super(TemplateIpsec4TunIfEsp, cls).tearDownClass()

    def setUp(self):
        super(TemplateIpsec4TunIfEsp, self).setUp()

        self.tun_if = self.pg0

        p = self.ipv4_params

        p.tun_if = VppIpsecTunInterface(self, self.pg0, p.vpp_tun_spi,
                                        p.scapy_tun_spi, p.crypt_algo_vpp_id,
                                        p.crypt_key, p.crypt_key,
                                        p.auth_algo_vpp_id, p.auth_key,
                                        p.auth_key)
        p.tun_if.add_vpp_config()
        p.tun_if.admin_up()
        p.tun_if.config_ip4()
        p.tun_if.config_ip6()

        r = VppIpRoute(self, p.remote_tun_if_host, 32,
                       [VppRoutePath(p.tun_if.remote_ip4,
                                     0xffffffff)])
        r.add_vpp_config()
        r = VppIpRoute(self, p.remote_tun_if_host6, 128,
                       [VppRoutePath(p.tun_if.remote_ip6,
                                     0xffffffff,
                                     proto=DpoProto.DPO_PROTO_IP6)])
        r.add_vpp_config()

    def tearDown(self):
        super(TemplateIpsec4TunIfEsp, self).tearDown()


class TemplateIpsec4TunIfEspUdp(TemplateIpsec):
    """ IPsec UDP tunnel interface tests """

    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt"
    encryption_type = ESP

    @classmethod
    def setUpClass(cls):
        super(TemplateIpsec4TunIfEspUdp, cls).setUpClass()

    @classmethod
    def tearDownClass(cls):
        super(TemplateIpsec4TunIfEspUdp, cls).tearDownClass()

    def setUp(self):
        super(TemplateIpsec4TunIfEspUdp, self).setUp()

        self.tun_if = self.pg0

        p = self.ipv4_params
        p.flags = (VppEnum.vl_api_ipsec_sad_flags_t.
                   IPSEC_API_SAD_FLAG_UDP_ENCAP)
        p.nat_header = UDP(sport=5454, dport=4500)

        p.tun_if = VppIpsecTunInterface(self, self.pg0, p.vpp_tun_spi,
                                        p.scapy_tun_spi, p.crypt_algo_vpp_id,
                                        p.crypt_key, p.crypt_key,
                                        p.auth_algo_vpp_id, p.auth_key,
                                        p.auth_key, udp_encap=True)
        p.tun_if.add_vpp_config()
        p.tun_if.admin_up()
        p.tun_if.config_ip4()
        p.tun_if.config_ip6()

        r = VppIpRoute(self, p.remote_tun_if_host, 32,
                       [VppRoutePath(p.tun_if.remote_ip4,
                                     0xffffffff)])
        r.add_vpp_config()
        r = VppIpRoute(self, p.remote_tun_if_host6, 128,
                       [VppRoutePath(p.tun_if.remote_ip6,
                                     0xffffffff,
                                     proto=DpoProto.DPO_PROTO_IP6)])
        r.add_vpp_config()

    def tearDown(self):
        super(TemplateIpsec4TunIfEspUdp, self).tearDown()


class TestIpsec4TunIfEsp1(TemplateIpsec4TunIfEsp, IpsecTun4Tests):
    """ Ipsec ESP - TUN tests """
    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt"

    def test_tun_basic64(self):
        """ ipsec 6o4 tunnel basic test """
        self.tun4_encrypt_node_name = "esp6-encrypt-tun"

        self.verify_tun_64(self.params[socket.AF_INET], count=1)

    def test_tun_burst64(self):
        """ ipsec 6o4 tunnel basic test """
        self.tun4_encrypt_node_name = "esp6-encrypt-tun"

        self.verify_tun_64(self.params[socket.AF_INET], count=257)

    def test_tun_basic_frag44(self):
        """ ipsec 4o4 tunnel frag basic test """
        self.tun4_encrypt_node_name = "esp4-encrypt-tun"

        p = self.ipv4_params

        self.vapi.sw_interface_set_mtu(p.tun_if.sw_if_index,
                                       [1500, 0, 0, 0])
        self.verify_tun_44(self.params[socket.AF_INET],
                           count=1, payload_size=1800, n_rx=2)
        self.vapi.sw_interface_set_mtu(p.tun_if.sw_if_index,
                                       [9000, 0, 0, 0])


class TestIpsec4TunIfEspUdp(TemplateIpsec4TunIfEspUdp, IpsecTun4Tests):
    """ Ipsec ESP UDP tests """

    tun4_input_node = "ipsec4-if-input"

    def test_keepalive(self):
        """ IPSEC NAT Keepalive """
        self.verify_keepalive(self.ipv4_params)


class TestIpsec4TunIfEsp2(TemplateIpsec4TunIfEsp, IpsecTcpTests):
    """ Ipsec ESP - TCP tests """
    pass


class TemplateIpsec6TunIfEsp(TemplateIpsec):
    """ IPsec tunnel interface tests """

    encryption_type = ESP

    def setUp(self):
        super(TemplateIpsec6TunIfEsp, self).setUp()

        self.tun_if = self.pg0

        p = self.ipv6_params
        tun_if = VppIpsecTunInterface(self, self.pg0, p.vpp_tun_spi,
                                      p.scapy_tun_spi, p.crypt_algo_vpp_id,
                                      p.crypt_key, p.crypt_key,
                                      p.auth_algo_vpp_id, p.auth_key,
                                      p.auth_key, is_ip6=True)
        tun_if.add_vpp_config()
        tun_if.admin_up()
        tun_if.config_ip6()
        tun_if.config_ip4()

        r = VppIpRoute(self, p.remote_tun_if_host, 128,
                       [VppRoutePath(tun_if.remote_ip6,
                                     0xffffffff,
                                     proto=DpoProto.DPO_PROTO_IP6)])
        r.add_vpp_config()
        r = VppIpRoute(self, p.remote_tun_if_host4, 32,
                       [VppRoutePath(tun_if.remote_ip4,
                                     0xffffffff)])
        r.add_vpp_config()

    def tearDown(self):
        super(TemplateIpsec6TunIfEsp, self).tearDown()


class TestIpsec6TunIfEsp1(TemplateIpsec6TunIfEsp, IpsecTun6Tests):
    """ Ipsec ESP - TUN tests """
    tun6_encrypt_node_name = "esp6-encrypt-tun"
    tun6_decrypt_node_name = "esp6-decrypt"

    def test_tun_basic46(self):
        """ ipsec 4o6 tunnel basic test """
        self.tun6_encrypt_node_name = "esp4-encrypt-tun"
        self.verify_tun_46(self.params[socket.AF_INET6], count=1)

    def test_tun_burst46(self):
        """ ipsec 4o6 tunnel burst test """
        self.tun6_encrypt_node_name = "esp4-encrypt-tun"
        self.verify_tun_46(self.params[socket.AF_INET6], count=257)


class TestIpsec4MultiTunIfEsp(TemplateIpsec, IpsecTun4):
    """ IPsec IPv4 Multi Tunnel interface """

    encryption_type = ESP
    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt"

    def setUp(self):
        super(TestIpsec4MultiTunIfEsp, self).setUp()

        self.tun_if = self.pg0

        self.multi_params = []

        for ii in range(10):
            p = copy.copy(self.ipv4_params)

            p.remote_tun_if_host = "1.1.1.%d" % (ii + 1)
            p.scapy_tun_sa_id = p.scapy_tun_sa_id + ii
            p.scapy_tun_spi = p.scapy_tun_spi + ii
            p.vpp_tun_sa_id = p.vpp_tun_sa_id + ii
            p.vpp_tun_spi = p.vpp_tun_spi + ii

            p.scapy_tra_sa_id = p.scapy_tra_sa_id + ii
            p.scapy_tra_spi = p.scapy_tra_spi + ii
            p.vpp_tra_sa_id = p.vpp_tra_sa_id + ii
            p.vpp_tra_spi = p.vpp_tra_spi + ii

            config_tun_params(p, self.encryption_type, self.tun_if)
            self.multi_params.append(p)

            p.tun_if = VppIpsecTunInterface(self, self.pg0, p.vpp_tun_spi,
                                            p.scapy_tun_spi,
                                            p.crypt_algo_vpp_id,
                                            p.crypt_key, p.crypt_key,
                                            p.auth_algo_vpp_id, p.auth_key,
                                            p.auth_key)
            p.tun_if.add_vpp_config()
            p.tun_if.admin_up()
            p.tun_if.config_ip4()

            VppIpRoute(self, p.remote_tun_if_host, 32,
                       [VppRoutePath(p.tun_if.remote_ip4,
                                     0xffffffff)]).add_vpp_config()

    def tearDown(self):
        super(TestIpsec4MultiTunIfEsp, self).tearDown()

    def test_tun_44(self):
        """Multiple IPSEC tunnel interfaces """
        for p in self.multi_params:
            self.verify_tun_44(p, count=127)
            c = p.tun_if.get_rx_stats()
            self.assertEqual(c['packets'], 127)
            c = p.tun_if.get_tx_stats()
            self.assertEqual(c['packets'], 127)


class TestIpsec4TunIfEspAll(TemplateIpsec, IpsecTun4):
    """ IPsec IPv4 Tunnel interface all Algos """

    encryption_type = ESP
    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt"

    def config_network(self, p):
        config_tun_params(p, self.encryption_type, self.tun_if)

        p.tun_if = VppIpsecTunInterface(self, self.pg0, p.vpp_tun_spi,
                                        p.scapy_tun_spi,
                                        p.crypt_algo_vpp_id,
                                        p.crypt_key, p.crypt_key,
                                        p.auth_algo_vpp_id, p.auth_key,
                                        p.auth_key,
                                        salt=p.salt)
        p.tun_if.add_vpp_config()
        p.tun_if.admin_up()
        p.tun_if.config_ip4()
        self.logger.info(self.vapi.cli("sh ipsec sa 0"))
        self.logger.info(self.vapi.cli("sh ipsec sa 1"))

        p.route = VppIpRoute(self, p.remote_tun_if_host, 32,
                             [VppRoutePath(p.tun_if.remote_ip4,
                                           0xffffffff)])
        p.route.add_vpp_config()

    def unconfig_network(self, p):
        p.tun_if.unconfig_ip4()
        p.tun_if.remove_vpp_config()
        p.route.remove_vpp_config()

    def setUp(self):
        super(TestIpsec4TunIfEspAll, self).setUp()

        self.tun_if = self.pg0

    def tearDown(self):
        super(TestIpsec4TunIfEspAll, self).tearDown()

    def rekey(self, p):
        #
        # change the key and the SPI
        #
        p.crypt_key = 'X' + p.crypt_key[1:]
        p.scapy_tun_spi += 1
        p.scapy_tun_sa_id += 1
        p.vpp_tun_spi += 1
        p.vpp_tun_sa_id += 1
        p.tun_if.local_spi = p.vpp_tun_spi
        p.tun_if.remote_spi = p.scapy_tun_spi

        config_tun_params(p, self.encryption_type, self.tun_if)

        p.tun_sa_in = VppIpsecSA(self,
                                 p.scapy_tun_sa_id,
                                 p.scapy_tun_spi,
                                 p.auth_algo_vpp_id,
                                 p.auth_key,
                                 p.crypt_algo_vpp_id,
                                 p.crypt_key,
                                 self.vpp_esp_protocol,
                                 self.tun_if.local_addr[p.addr_type],
                                 self.tun_if.remote_addr[p.addr_type],
                                 flags=p.flags,
                                 salt=p.salt)
        p.tun_sa_out = VppIpsecSA(self,
                                  p.vpp_tun_sa_id,
                                  p.vpp_tun_spi,
                                  p.auth_algo_vpp_id,
                                  p.auth_key,
                                  p.crypt_algo_vpp_id,
                                  p.crypt_key,
                                  self.vpp_esp_protocol,
                                  self.tun_if.remote_addr[p.addr_type],
                                  self.tun_if.local_addr[p.addr_type],
                                  flags=p.flags,
                                  salt=p.salt)
        p.tun_sa_in.add_vpp_config()
        p.tun_sa_out.add_vpp_config()

        self.vapi.ipsec_tunnel_if_set_sa(sw_if_index=p.tun_if.sw_if_index,
                                         sa_id=p.tun_sa_in.id,
                                         is_outbound=1)
        self.vapi.ipsec_tunnel_if_set_sa(sw_if_index=p.tun_if.sw_if_index,
                                         sa_id=p.tun_sa_out.id,
                                         is_outbound=0)
        self.logger.info(self.vapi.cli("sh ipsec sa"))

    def test_tun_44(self):
        """IPSEC tunnel all algos """

        # foreach VPP crypto engine
        engines = ["ia32", "ipsecmb", "openssl"]

        # foreach crypto algorithm
        algos = [{'vpp-crypto': (VppEnum.vl_api_ipsec_crypto_alg_t.
                                 IPSEC_API_CRYPTO_ALG_AES_GCM_128),
                  'vpp-integ': (VppEnum.vl_api_ipsec_integ_alg_t.
                                IPSEC_API_INTEG_ALG_NONE),
                  'scapy-crypto': "AES-GCM",
                  'scapy-integ': "NULL",
                  'key': "JPjyOWBeVEQiMe7h",
                  'salt': 3333},
                 {'vpp-crypto': (VppEnum.vl_api_ipsec_crypto_alg_t.
                                 IPSEC_API_CRYPTO_ALG_AES_GCM_192),
                  'vpp-integ': (VppEnum.vl_api_ipsec_integ_alg_t.
                                IPSEC_API_INTEG_ALG_NONE),
                  'scapy-crypto': "AES-GCM",
                  'scapy-integ': "NULL",
                  'key': "JPjyOWBeVEQiMe7hJPjyOWBe",
                  'salt': 0},
                 {'vpp-crypto': (VppEnum.vl_api_ipsec_crypto_alg_t.
                                 IPSEC_API_CRYPTO_ALG_AES_GCM_256),
                  'vpp-integ': (VppEnum.vl_api_ipsec_integ_alg_t.
                                IPSEC_API_INTEG_ALG_NONE),
                  'scapy-crypto': "AES-GCM",
                  'scapy-integ': "NULL",
                  'key': "JPjyOWBeVEQiMe7hJPjyOWBeVEQiMe7h",
                  'salt': 9999},
                 {'vpp-crypto': (VppEnum.vl_api_ipsec_crypto_alg_t.
                                 IPSEC_API_CRYPTO_ALG_AES_CBC_128),
                  'vpp-integ': (VppEnum.vl_api_ipsec_integ_alg_t.
                                IPSEC_API_INTEG_ALG_SHA1_96),
                  'scapy-crypto': "AES-CBC",
                  'scapy-integ': "HMAC-SHA1-96",
                  'salt': 0,
                  'key': "JPjyOWBeVEQiMe7h"},
                 {'vpp-crypto': (VppEnum.vl_api_ipsec_crypto_alg_t.
                                 IPSEC_API_CRYPTO_ALG_AES_CBC_192),
                  'vpp-integ': (VppEnum.vl_api_ipsec_integ_alg_t.
                                IPSEC_API_INTEG_ALG_SHA1_96),
                  'scapy-crypto': "AES-CBC",
                  'scapy-integ': "HMAC-SHA1-96",
                  'salt': 0,
                  'key': "JPjyOWBeVEQiMe7hJPjyOWBe"},
                 {'vpp-crypto': (VppEnum.vl_api_ipsec_crypto_alg_t.
                                 IPSEC_API_CRYPTO_ALG_AES_CBC_256),
                  'vpp-integ': (VppEnum.vl_api_ipsec_integ_alg_t.
                                IPSEC_API_INTEG_ALG_SHA1_96),
                  'scapy-crypto': "AES-CBC",
                  'scapy-integ': "HMAC-SHA1-96",
                  'salt': 0,
                  'key': "JPjyOWBeVEQiMe7hJPjyOWBeVEQiMe7h"},
                 {'vpp-crypto': (VppEnum.vl_api_ipsec_crypto_alg_t.
                                 IPSEC_API_CRYPTO_ALG_NONE),
                  'vpp-integ': (VppEnum.vl_api_ipsec_integ_alg_t.
                                IPSEC_API_INTEG_ALG_SHA1_96),
                  'scapy-crypto': "NULL",
                  'scapy-integ': "HMAC-SHA1-96",
                  'salt': 0,
                  'key': "JPjyOWBeVEQiMe7hJPjyOWBeVEQiMe7h"}]

        for engine in engines:
            self.vapi.cli("set crypto handler all %s" % engine)

            #
            # loop through each of the algorithms
            #
            for algo in algos:
                # with self.subTest(algo=algo['scapy']):

                p = copy.copy(self.ipv4_params)
                p.auth_algo_vpp_id = algo['vpp-integ']
                p.crypt_algo_vpp_id = algo['vpp-crypto']
                p.crypt_algo = algo['scapy-crypto']
                p.auth_algo = algo['scapy-integ']
                p.crypt_key = algo['key']
                p.salt = algo['salt']

                self.config_network(p)

                self.verify_tun_44(p, count=127)
                c = p.tun_if.get_rx_stats()
                self.assertEqual(c['packets'], 127)
                c = p.tun_if.get_tx_stats()
                self.assertEqual(c['packets'], 127)

                #
                # rekey the tunnel
                #
                self.rekey(p)
                self.verify_tun_44(p, count=127)

                self.unconfig_network(p)
                p.tun_sa_out.remove_vpp_config()
                p.tun_sa_in.remove_vpp_config()


class TestIpsec6MultiTunIfEsp(TemplateIpsec, IpsecTun6):
    """ IPsec IPv6 Multi Tunnel interface """

    encryption_type = ESP
    tun6_encrypt_node_name = "esp6-encrypt-tun"
    tun6_decrypt_node_name = "esp6-decrypt"

    def setUp(self):
        super(TestIpsec6MultiTunIfEsp, self).setUp()

        self.tun_if = self.pg0

        self.multi_params = []

        for ii in range(10):
            p = copy.copy(self.ipv6_params)

            p.remote_tun_if_host = "1111::%d" % (ii + 1)
            p.scapy_tun_sa_id = p.scapy_tun_sa_id + ii
            p.scapy_tun_spi = p.scapy_tun_spi + ii
            p.vpp_tun_sa_id = p.vpp_tun_sa_id + ii
            p.vpp_tun_spi = p.vpp_tun_spi + ii

            p.scapy_tra_sa_id = p.scapy_tra_sa_id + ii
            p.scapy_tra_spi = p.scapy_tra_spi + ii
            p.vpp_tra_sa_id = p.vpp_tra_sa_id + ii
            p.vpp_tra_spi = p.vpp_tra_spi + ii

            config_tun_params(p, self.encryption_type, self.tun_if)
            self.multi_params.append(p)

            p.tun_if = VppIpsecTunInterface(self, self.pg0, p.vpp_tun_spi,
                                            p.scapy_tun_spi,
                                            p.crypt_algo_vpp_id,
                                            p.crypt_key, p.crypt_key,
                                            p.auth_algo_vpp_id, p.auth_key,
                                            p.auth_key, is_ip6=True)
            p.tun_if.add_vpp_config()
            p.tun_if.admin_up()
            p.tun_if.config_ip6()

            r = VppIpRoute(self, p.remote_tun_if_host, 128,
                           [VppRoutePath(p.tun_if.remote_ip6,
                                         0xffffffff,
                                         proto=DpoProto.DPO_PROTO_IP6)])
            r.add_vpp_config()

    def tearDown(self):
        super(TestIpsec6MultiTunIfEsp, self).tearDown()

    def test_tun_66(self):
        """Multiple IPSEC tunnel interfaces """
        for p in self.multi_params:
            self.verify_tun_66(p, count=127)
            c = p.tun_if.get_rx_stats()
            self.assertEqual(c['packets'], 127)
            c = p.tun_if.get_tx_stats()
            self.assertEqual(c['packets'], 127)


class TestIpsecGreTebIfEsp(TemplateIpsec,
                           IpsecTun4Tests):
    """ Ipsec GRE TEB ESP - TUN tests """
    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt-tun"
    encryption_type = ESP
    omac = "00:11:22:33:44:55"

    def gen_encrypt_pkts(self, sa, sw_intf, src, dst, count=1,
                         payload_size=100):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                sa.encrypt(IP(src=self.pg0.remote_ip4,
                              dst=self.pg0.local_ip4) /
                           GRE() /
                           Ether(dst=self.omac) /
                           IP(src="1.1.1.1", dst="1.1.1.2") /
                           UDP(sport=1144, dport=2233) /
                           Raw('X' * payload_size))
                for i in range(count)]

    def gen_pkts(self, sw_intf, src, dst, count=1,
                 payload_size=100):
        return [Ether(dst=self.omac) /
                IP(src="1.1.1.1", dst="1.1.1.2") /
                UDP(sport=1144, dport=2233) /
                Raw('X' * payload_size)
                for i in range(count)]

    def verify_decrypted(self, p, rxs):
        for rx in rxs:
            self.assert_equal(rx[Ether].dst, self.omac)
            self.assert_equal(rx[IP].dst, "1.1.1.2")

    def verify_encrypted(self, p, sa, rxs):
        for rx in rxs:
            try:
                pkt = sa.decrypt(rx[IP])
                if not pkt.haslayer(IP):
                    pkt = IP(pkt[Raw].load)
                self.assert_packet_checksums_valid(pkt)
                self.assert_equal(pkt[IP].dst, self.pg0.remote_ip4)
                self.assert_equal(pkt[IP].src, self.pg0.local_ip4)
                self.assertTrue(pkt.haslayer(GRE))
                e = pkt[Ether]
                self.assertEqual(e[Ether].dst, self.omac)
                self.assertEqual(e[IP].dst, "1.1.1.2")
            except (IndexError, AssertionError):
                self.logger.debug(ppp("Unexpected packet:", rx))
                try:
                    self.logger.debug(ppp("Decrypted packet:", pkt))
                except:
                    pass
                raise

    def setUp(self):
        super(TestIpsecGreTebIfEsp, self).setUp()

        self.tun_if = self.pg0

        p = self.ipv4_params

        bd1 = VppBridgeDomain(self, 1)
        bd1.add_vpp_config()

        p.tun_sa_out = VppIpsecSA(self, p.scapy_tun_sa_id, p.scapy_tun_spi,
                                  p.auth_algo_vpp_id, p.auth_key,
                                  p.crypt_algo_vpp_id, p.crypt_key,
                                  self.vpp_esp_protocol,
                                  self.pg0.local_ip4,
                                  self.pg0.remote_ip4)
        p.tun_sa_out.add_vpp_config()

        p.tun_sa_in = VppIpsecSA(self, p.vpp_tun_sa_id, p.vpp_tun_spi,
                                 p.auth_algo_vpp_id, p.auth_key,
                                 p.crypt_algo_vpp_id, p.crypt_key,
                                 self.vpp_esp_protocol,
                                 self.pg0.remote_ip4,
                                 self.pg0.local_ip4)
        p.tun_sa_in.add_vpp_config()

        self.tun = VppGreInterface(self,
                                   self.pg0.local_ip4,
                                   self.pg0.remote_ip4,
                                   type=(VppEnum.vl_api_gre_tunnel_type_t.
                                         GRE_API_TUNNEL_TYPE_TEB))
        self.tun.add_vpp_config()

        p.tun_protect = VppIpsecTunProtect(self,
                                           self.tun,
                                           p.tun_sa_out,
                                           [p.tun_sa_in])

        p.tun_protect.add_vpp_config()

        self.tun.admin_up()
        self.tun.config_ip4()

        VppBridgeDomainPort(self, bd1, self.tun).add_vpp_config()
        VppBridgeDomainPort(self, bd1, self.pg1).add_vpp_config()

        self.vapi.cli("clear ipsec sa")

    def tearDown(self):
        self.tun.unconfig_ip4()
        super(TestIpsecGreTebIfEsp, self).tearDown()


class TestIpsecGreIfEsp(TemplateIpsec,
                        IpsecTun4Tests):
    """ Ipsec GRE ESP - TUN tests """
    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt-tun"
    encryption_type = ESP

    def gen_encrypt_pkts(self, sa, sw_intf, src, dst, count=1,
                         payload_size=100):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                sa.encrypt(IP(src=self.pg0.remote_ip4,
                              dst=self.pg0.local_ip4) /
                           GRE() /
                           IP(src=self.pg1.local_ip4,
                              dst=self.pg1.remote_ip4) /
                           UDP(sport=1144, dport=2233) /
                           Raw('X' * payload_size))
                for i in range(count)]

    def gen_pkts(self, sw_intf, src, dst, count=1,
                 payload_size=100):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                IP(src="1.1.1.1", dst="1.1.1.2") /
                UDP(sport=1144, dport=2233) /
                Raw('X' * payload_size)
                for i in range(count)]

    def verify_decrypted(self, p, rxs):
        for rx in rxs:
            self.assert_equal(rx[Ether].dst, self.pg1.remote_mac)
            self.assert_equal(rx[IP].dst, self.pg1.remote_ip4)

    def verify_encrypted(self, p, sa, rxs):
        for rx in rxs:
            try:
                pkt = sa.decrypt(rx[IP])
                if not pkt.haslayer(IP):
                    pkt = IP(pkt[Raw].load)
                self.assert_packet_checksums_valid(pkt)
                self.assert_equal(pkt[IP].dst, self.pg0.remote_ip4)
                self.assert_equal(pkt[IP].src, self.pg0.local_ip4)
                self.assertTrue(pkt.haslayer(GRE))
                e = pkt[GRE]
                self.assertEqual(e[IP].dst, "1.1.1.2")
            except (IndexError, AssertionError):
                self.logger.debug(ppp("Unexpected packet:", rx))
                try:
                    self.logger.debug(ppp("Decrypted packet:", pkt))
                except:
                    pass
                raise

    def setUp(self):
        super(TestIpsecGreIfEsp, self).setUp()

        self.tun_if = self.pg0

        p = self.ipv4_params

        bd1 = VppBridgeDomain(self, 1)
        bd1.add_vpp_config()

        p.tun_sa_out = VppIpsecSA(self, p.scapy_tun_sa_id, p.scapy_tun_spi,
                                  p.auth_algo_vpp_id, p.auth_key,
                                  p.crypt_algo_vpp_id, p.crypt_key,
                                  self.vpp_esp_protocol,
                                  self.pg0.local_ip4,
                                  self.pg0.remote_ip4)
        p.tun_sa_out.add_vpp_config()

        p.tun_sa_in = VppIpsecSA(self, p.vpp_tun_sa_id, p.vpp_tun_spi,
                                 p.auth_algo_vpp_id, p.auth_key,
                                 p.crypt_algo_vpp_id, p.crypt_key,
                                 self.vpp_esp_protocol,
                                 self.pg0.remote_ip4,
                                 self.pg0.local_ip4)
        p.tun_sa_in.add_vpp_config()

        self.tun = VppGreInterface(self,
                                   self.pg0.local_ip4,
                                   self.pg0.remote_ip4)
        self.tun.add_vpp_config()

        p.tun_protect = VppIpsecTunProtect(self,
                                           self.tun,
                                           p.tun_sa_out,
                                           [p.tun_sa_in])
        p.tun_protect.add_vpp_config()

        self.tun.admin_up()
        self.tun.config_ip4()

        VppIpRoute(self, "1.1.1.2", 32,
                   [VppRoutePath(self.tun.remote_ip4,
                                 0xffffffff)]).add_vpp_config()

    def tearDown(self):
        self.tun.unconfig_ip4()
        super(TestIpsecGreIfEsp, self).tearDown()


class TemplateIpsec4TunProtect(object):
    """ IPsec IPv4 Tunnel protect """

    encryption_type = ESP
    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt-tun"
    tun4_input_node = "ipsec4-tun-input"

    def config_sa_tra(self, p):
        config_tun_params(p, self.encryption_type, self.tun_if)

        p.tun_sa_out = VppIpsecSA(self, p.scapy_tun_sa_id, p.scapy_tun_spi,
                                  p.auth_algo_vpp_id, p.auth_key,
                                  p.crypt_algo_vpp_id, p.crypt_key,
                                  self.vpp_esp_protocol,
                                  flags=p.flags)
        p.tun_sa_out.add_vpp_config()

        p.tun_sa_in = VppIpsecSA(self, p.vpp_tun_sa_id, p.vpp_tun_spi,
                                 p.auth_algo_vpp_id, p.auth_key,
                                 p.crypt_algo_vpp_id, p.crypt_key,
                                 self.vpp_esp_protocol,
                                 flags=p.flags)
        p.tun_sa_in.add_vpp_config()

    def config_sa_tun(self, p):
        config_tun_params(p, self.encryption_type, self.tun_if)

        p.tun_sa_out = VppIpsecSA(self, p.scapy_tun_sa_id, p.scapy_tun_spi,
                                  p.auth_algo_vpp_id, p.auth_key,
                                  p.crypt_algo_vpp_id, p.crypt_key,
                                  self.vpp_esp_protocol,
                                  self.tun_if.remote_addr[p.addr_type],
                                  self.tun_if.local_addr[p.addr_type],
                                  flags=p.flags)
        p.tun_sa_out.add_vpp_config()

        p.tun_sa_in = VppIpsecSA(self, p.vpp_tun_sa_id, p.vpp_tun_spi,
                                 p.auth_algo_vpp_id, p.auth_key,
                                 p.crypt_algo_vpp_id, p.crypt_key,
                                 self.vpp_esp_protocol,
                                 self.tun_if.remote_addr[p.addr_type],
                                 self.tun_if.local_addr[p.addr_type],
                                 flags=p.flags)
        p.tun_sa_in.add_vpp_config()

    def config_protect(self, p):
        p.tun_protect = VppIpsecTunProtect(self,
                                           p.tun_if,
                                           p.tun_sa_out,
                                           [p.tun_sa_in])
        p.tun_protect.add_vpp_config()

    def config_network(self, p):
        p.tun_if = VppIpIpTunInterface(self, self.pg0,
                                       self.pg0.local_ip4,
                                       self.pg0.remote_ip4)
        p.tun_if.add_vpp_config()
        p.tun_if.admin_up()
        p.tun_if.config_ip4()
        p.tun_if.config_ip6()

        p.route = VppIpRoute(self, p.remote_tun_if_host, 32,
                             [VppRoutePath(p.tun_if.remote_ip4,
                                           0xffffffff)])
        p.route.add_vpp_config()
        r = VppIpRoute(self, p.remote_tun_if_host6, 128,
                       [VppRoutePath(p.tun_if.remote_ip6,
                                     0xffffffff,
                                     proto=DpoProto.DPO_PROTO_IP6)])
        r.add_vpp_config()

    def unconfig_network(self, p):
        p.route.remove_vpp_config()
        p.tun_if.remove_vpp_config()

    def unconfig_protect(self, p):
        p.tun_protect.remove_vpp_config()

    def unconfig_sa(self, p):
        p.tun_sa_out.remove_vpp_config()
        p.tun_sa_in.remove_vpp_config()


class TestIpsec4TunProtect(TemplateIpsec,
                           TemplateIpsec4TunProtect,
                           IpsecTun4):
    """ IPsec IPv4 Tunnel protect - transport mode"""

    def setUp(self):
        super(TestIpsec4TunProtect, self).setUp()

        self.tun_if = self.pg0

    def tearDown(self):
        super(TestIpsec4TunProtect, self).tearDown()

    def test_tun_44(self):
        """IPSEC tunnel protect"""

        p = self.ipv4_params

        self.config_network(p)
        self.config_sa_tra(p)
        self.config_protect(p)

        self.verify_tun_44(p, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 127)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 127)

        self.vapi.cli("clear ipsec sa")
        self.verify_tun_64(p, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 254)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 254)

        # rekey - create new SAs and update the tunnel protection
        np = copy.copy(p)
        np.crypt_key = 'X' + p.crypt_key[1:]
        np.scapy_tun_spi += 100
        np.scapy_tun_sa_id += 1
        np.vpp_tun_spi += 100
        np.vpp_tun_sa_id += 1
        np.tun_if.local_spi = p.vpp_tun_spi
        np.tun_if.remote_spi = p.scapy_tun_spi

        self.config_sa_tra(np)
        self.config_protect(np)
        self.unconfig_sa(p)

        self.verify_tun_44(np, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 381)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 381)

        # teardown
        self.unconfig_protect(np)
        self.unconfig_sa(np)
        self.unconfig_network(p)


class TestIpsec4TunProtectUdp(TemplateIpsec,
                              TemplateIpsec4TunProtect,
                              IpsecTun4):
    """ IPsec IPv4 Tunnel protect - transport mode"""

    def setUp(self):
        super(TestIpsec4TunProtectUdp, self).setUp()

        self.tun_if = self.pg0

        p = self.ipv4_params
        p.flags = (VppEnum.vl_api_ipsec_sad_flags_t.
                   IPSEC_API_SAD_FLAG_UDP_ENCAP)
        p.nat_header = UDP(sport=5454, dport=4500)
        self.config_network(p)
        self.config_sa_tra(p)
        self.config_protect(p)

    def tearDown(self):
        p = self.ipv4_params
        self.unconfig_protect(p)
        self.unconfig_sa(p)
        self.unconfig_network(p)
        super(TestIpsec4TunProtectUdp, self).tearDown()

    def test_tun_44(self):
        """IPSEC UDP tunnel protect"""

        p = self.ipv4_params

        self.verify_tun_44(p, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 127)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 127)

    def test_keepalive(self):
        """ IPSEC NAT Keepalive """
        self.verify_keepalive(self.ipv4_params)


class TestIpsec4TunProtectTun(TemplateIpsec,
                              TemplateIpsec4TunProtect,
                              IpsecTun4):
    """ IPsec IPv4 Tunnel protect - tunnel mode"""

    encryption_type = ESP
    tun4_encrypt_node_name = "esp4-encrypt-tun"
    tun4_decrypt_node_name = "esp4-decrypt-tun"

    def setUp(self):
        super(TestIpsec4TunProtectTun, self).setUp()

        self.tun_if = self.pg0

    def tearDown(self):
        super(TestIpsec4TunProtectTun, self).tearDown()

    def gen_encrypt_pkts(self, sa, sw_intf, src, dst, count=1,
                         payload_size=100):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                sa.encrypt(IP(src=sw_intf.remote_ip4,
                              dst=sw_intf.local_ip4) /
                           IP(src=src, dst=dst) /
                           UDP(sport=1144, dport=2233) /
                           Raw('X' * payload_size))
                for i in range(count)]

    def gen_pkts(self, sw_intf, src, dst, count=1,
                 payload_size=100):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                IP(src=src, dst=dst) /
                UDP(sport=1144, dport=2233) /
                Raw('X' * payload_size)
                for i in range(count)]

    def verify_decrypted(self, p, rxs):
        for rx in rxs:
            self.assert_equal(rx[IP].dst, self.pg1.remote_ip4)
            self.assert_equal(rx[IP].src, p.remote_tun_if_host)
            self.assert_packet_checksums_valid(rx)

    def verify_encrypted(self, p, sa, rxs):
        for rx in rxs:
            try:
                pkt = sa.decrypt(rx[IP])
                if not pkt.haslayer(IP):
                    pkt = IP(pkt[Raw].load)
                self.assert_packet_checksums_valid(pkt)
                self.assert_equal(pkt[IP].dst, self.pg0.remote_ip4)
                self.assert_equal(pkt[IP].src, self.pg0.local_ip4)
                inner = pkt[IP].payload
                self.assertEqual(inner[IP][IP].dst, p.remote_tun_if_host)

            except (IndexError, AssertionError):
                self.logger.debug(ppp("Unexpected packet:", rx))
                try:
                    self.logger.debug(ppp("Decrypted packet:", pkt))
                except:
                    pass
                raise

    def test_tun_44(self):
        """IPSEC tunnel protect """

        p = self.ipv4_params

        self.config_network(p)
        self.config_sa_tun(p)
        self.config_protect(p)

        self.verify_tun_44(p, count=127)

        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 127)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 127)

        # rekey - create new SAs and update the tunnel protection
        np = copy.copy(p)
        np.crypt_key = 'X' + p.crypt_key[1:]
        np.scapy_tun_spi += 100
        np.scapy_tun_sa_id += 1
        np.vpp_tun_spi += 100
        np.vpp_tun_sa_id += 1
        np.tun_if.local_spi = p.vpp_tun_spi
        np.tun_if.remote_spi = p.scapy_tun_spi

        self.config_sa_tun(np)
        self.config_protect(np)
        self.unconfig_sa(p)

        self.verify_tun_44(np, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 254)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 254)

        # teardown
        self.unconfig_protect(np)
        self.unconfig_sa(np)
        self.unconfig_network(p)


class TemplateIpsec6TunProtect(object):
    """ IPsec IPv6 Tunnel protect """

    def config_sa_tra(self, p):
        config_tun_params(p, self.encryption_type, self.tun_if)

        p.tun_sa_out = VppIpsecSA(self, p.scapy_tun_sa_id, p.scapy_tun_spi,
                                  p.auth_algo_vpp_id, p.auth_key,
                                  p.crypt_algo_vpp_id, p.crypt_key,
                                  self.vpp_esp_protocol)
        p.tun_sa_out.add_vpp_config()

        p.tun_sa_in = VppIpsecSA(self, p.vpp_tun_sa_id, p.vpp_tun_spi,
                                 p.auth_algo_vpp_id, p.auth_key,
                                 p.crypt_algo_vpp_id, p.crypt_key,
                                 self.vpp_esp_protocol)
        p.tun_sa_in.add_vpp_config()

    def config_sa_tun(self, p):
        config_tun_params(p, self.encryption_type, self.tun_if)

        p.tun_sa_out = VppIpsecSA(self, p.scapy_tun_sa_id, p.scapy_tun_spi,
                                  p.auth_algo_vpp_id, p.auth_key,
                                  p.crypt_algo_vpp_id, p.crypt_key,
                                  self.vpp_esp_protocol,
                                  self.tun_if.remote_addr[p.addr_type],
                                  self.tun_if.local_addr[p.addr_type])
        p.tun_sa_out.add_vpp_config()

        p.tun_sa_in = VppIpsecSA(self, p.vpp_tun_sa_id, p.vpp_tun_spi,
                                 p.auth_algo_vpp_id, p.auth_key,
                                 p.crypt_algo_vpp_id, p.crypt_key,
                                 self.vpp_esp_protocol,
                                 self.tun_if.remote_addr[p.addr_type],
                                 self.tun_if.local_addr[p.addr_type])
        p.tun_sa_in.add_vpp_config()

    def config_protect(self, p):
        p.tun_protect = VppIpsecTunProtect(self,
                                           p.tun_if,
                                           p.tun_sa_out,
                                           [p.tun_sa_in])
        p.tun_protect.add_vpp_config()

    def config_network(self, p):
        p.tun_if = VppIpIpTunInterface(self, self.pg0,
                                       self.pg0.local_ip6,
                                       self.pg0.remote_ip6)
        p.tun_if.add_vpp_config()
        p.tun_if.admin_up()
        p.tun_if.config_ip6()
        p.tun_if.config_ip4()

        p.route = VppIpRoute(self, p.remote_tun_if_host, 128,
                             [VppRoutePath(p.tun_if.remote_ip6,
                                           0xffffffff,
                                           proto=DpoProto.DPO_PROTO_IP6)])
        p.route.add_vpp_config()
        r = VppIpRoute(self, p.remote_tun_if_host4, 32,
                       [VppRoutePath(p.tun_if.remote_ip4,
                                     0xffffffff)])
        r.add_vpp_config()

    def unconfig_network(self, p):
        p.route.remove_vpp_config()
        p.tun_if.remove_vpp_config()

    def unconfig_protect(self, p):
        p.tun_protect.remove_vpp_config()

    def unconfig_sa(self, p):
        p.tun_sa_out.remove_vpp_config()
        p.tun_sa_in.remove_vpp_config()


class TestIpsec6TunProtect(TemplateIpsec,
                           TemplateIpsec6TunProtect,
                           IpsecTun6):
    """ IPsec IPv6 Tunnel protect - transport mode"""

    encryption_type = ESP
    tun6_encrypt_node_name = "esp6-encrypt-tun"
    tun6_decrypt_node_name = "esp6-decrypt-tun"

    def setUp(self):
        super(TestIpsec6TunProtect, self).setUp()

        self.tun_if = self.pg0

    def tearDown(self):
        super(TestIpsec6TunProtect, self).tearDown()

    def test_tun_66(self):
        """IPSEC tunnel protect"""

        p = self.ipv6_params

        self.config_network(p)
        self.config_sa_tra(p)
        self.config_protect(p)

        self.verify_tun_66(p, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 127)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 127)

        # rekey - create new SAs and update the tunnel protection
        np = copy.copy(p)
        np.crypt_key = 'X' + p.crypt_key[1:]
        np.scapy_tun_spi += 100
        np.scapy_tun_sa_id += 1
        np.vpp_tun_spi += 100
        np.vpp_tun_sa_id += 1
        np.tun_if.local_spi = p.vpp_tun_spi
        np.tun_if.remote_spi = p.scapy_tun_spi

        self.config_sa_tra(np)
        self.config_protect(np)
        self.unconfig_sa(p)

        self.verify_tun_66(np, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 254)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 254)

        # 3 phase rekey
        #  1) add two input SAs [old, new]
        #  2) swap output SA to [new]
        #  3) use only [new] input SA
        np3 = copy.copy(np)
        np3.crypt_key = 'Z' + p.crypt_key[1:]
        np3.scapy_tun_spi += 100
        np3.scapy_tun_sa_id += 1
        np3.vpp_tun_spi += 100
        np3.vpp_tun_sa_id += 1
        np3.tun_if.local_spi = p.vpp_tun_spi
        np3.tun_if.remote_spi = p.scapy_tun_spi

        self.config_sa_tra(np3)

        # step 1;
        p.tun_protect.update_vpp_config(np.tun_sa_out,
                                        [np.tun_sa_in, np3.tun_sa_in])
        self.verify_tun_66(np, np, count=127)
        self.verify_tun_66(np3, np, count=127)

        # step 2;
        p.tun_protect.update_vpp_config(np3.tun_sa_out,
                                        [np.tun_sa_in, np3.tun_sa_in])
        self.verify_tun_66(np, np3, count=127)
        self.verify_tun_66(np3, np3, count=127)

        # step 1;
        p.tun_protect.update_vpp_config(np3.tun_sa_out,
                                        [np3.tun_sa_in])
        self.verify_tun_66(np3, np3, count=127)
        self.verify_drop_tun_66(np, count=127)

        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 127*7)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 127*7)
        self.unconfig_sa(np)

        # teardown
        self.unconfig_protect(np3)
        self.unconfig_sa(np3)
        self.unconfig_network(p)

    def test_tun_46(self):
        """IPSEC tunnel protect"""

        p = self.ipv6_params

        self.config_network(p)
        self.config_sa_tra(p)
        self.config_protect(p)

        self.verify_tun_46(p, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 127)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 127)

        # teardown
        self.unconfig_protect(p)
        self.unconfig_sa(p)
        self.unconfig_network(p)


class TestIpsec6TunProtectTun(TemplateIpsec,
                              TemplateIpsec6TunProtect,
                              IpsecTun6):
    """ IPsec IPv6 Tunnel protect - tunnel mode"""

    encryption_type = ESP
    tun6_encrypt_node_name = "esp6-encrypt-tun"
    tun6_decrypt_node_name = "esp6-decrypt-tun"

    def setUp(self):
        super(TestIpsec6TunProtectTun, self).setUp()

        self.tun_if = self.pg0

    def tearDown(self):
        super(TestIpsec6TunProtectTun, self).tearDown()

    def gen_encrypt_pkts6(self, sa, sw_intf, src, dst, count=1,
                          payload_size=100):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                sa.encrypt(IPv6(src=sw_intf.remote_ip6,
                                dst=sw_intf.local_ip6) /
                           IPv6(src=src, dst=dst) /
                           UDP(sport=1166, dport=2233) /
                           Raw('X' * payload_size))
                for i in range(count)]

    def gen_pkts6(self, sw_intf, src, dst, count=1,
                  payload_size=100):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                IPv6(src=src, dst=dst) /
                UDP(sport=1166, dport=2233) /
                Raw('X' * payload_size)
                for i in range(count)]

    def verify_decrypted6(self, p, rxs):
        for rx in rxs:
            self.assert_equal(rx[IPv6].dst, self.pg1.remote_ip6)
            self.assert_equal(rx[IPv6].src, p.remote_tun_if_host)
            self.assert_packet_checksums_valid(rx)

    def verify_encrypted6(self, p, sa, rxs):
        for rx in rxs:
            try:
                pkt = sa.decrypt(rx[IPv6])
                if not pkt.haslayer(IPv6):
                    pkt = IPv6(pkt[Raw].load)
                self.assert_packet_checksums_valid(pkt)
                self.assert_equal(pkt[IPv6].dst, self.pg0.remote_ip6)
                self.assert_equal(pkt[IPv6].src, self.pg0.local_ip6)
                inner = pkt[IPv6].payload
                self.assertEqual(inner[IPv6][IPv6].dst, p.remote_tun_if_host)

            except (IndexError, AssertionError):
                self.logger.debug(ppp("Unexpected packet:", rx))
                try:
                    self.logger.debug(ppp("Decrypted packet:", pkt))
                except:
                    pass
                raise

    def test_tun_66(self):
        """IPSEC tunnel protect """

        p = self.ipv6_params

        self.config_network(p)
        self.config_sa_tun(p)
        self.config_protect(p)

        self.verify_tun_66(p, count=127)

        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 127)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 127)

        # rekey - create new SAs and update the tunnel protection
        np = copy.copy(p)
        np.crypt_key = 'X' + p.crypt_key[1:]
        np.scapy_tun_spi += 100
        np.scapy_tun_sa_id += 1
        np.vpp_tun_spi += 100
        np.vpp_tun_sa_id += 1
        np.tun_if.local_spi = p.vpp_tun_spi
        np.tun_if.remote_spi = p.scapy_tun_spi

        self.config_sa_tun(np)
        self.config_protect(np)
        self.unconfig_sa(p)

        self.verify_tun_66(np, count=127)
        c = p.tun_if.get_rx_stats()
        self.assertEqual(c['packets'], 254)
        c = p.tun_if.get_tx_stats()
        self.assertEqual(c['packets'], 254)

        # teardown
        self.unconfig_protect(np)
        self.unconfig_sa(np)
        self.unconfig_network(p)


if __name__ == '__main__':
    unittest.main(testRunner=VppTestRunner)