path: root/test/vpp_papi_provider.py

# NB NB NB NB NB NB NB NB NB NB NB
#
# NOTE: The API binary wrappers in this file are in the process of being
# deprecated. DO NOT ADD NEW WRAPPERS HERE. Call the functions using
# named arguments directly instead.
#

import os
import time
from collections import deque

from six import moves, iteritems
from vpp_papi import VPP, mac_pton
from hook import Hook
from vpp_l2 import L2_PORT_TYPE
from vpp_ip_route import MPLS_IETF_MAX_LABEL, MPLS_LABEL_INVALID


class L2_VTR_OP:
    L2_DISABLED = 0
    L2_PUSH_1 = 1
    L2_PUSH_2 = 2
    L2_POP_1 = 3
    L2_POP_2 = 4
    L2_TRANSLATE_1_1 = 5
    L2_TRANSLATE_1_2 = 6
    L2_TRANSLATE_2_1 = 7
    L2_TRANSLATE_2_2 = 8


class QOS_SOURCE:
    EXT = 0
    VLAN = 1
    MPLS = 2
    IP = 3


class SYSLOG_SEVERITY:
    EMERG = 0
    ALERT = 1
    CRIT = 2
    ERR = 3
    WARN = 4
    NOTICE = 5
    INFO = 6
    DBG = 7


#
# Dictionary keyed on message name to override default values for
# named parameters
#
defaultmapping = {
    'map_add_domain': {'mtu': 1280},
    'syslog_set_sender': {'collector_port': 514,
                          'max_msg_size': 480},
    'acl_interface_add_del': {'is_add': 1, 'is_input': 1},
    'acl_interface_list_dump': {'sw_if_index': 4294967295, },
    'app_namespace_add_del': {'sw_if_index': 4294967295, },
    'bd_ip_mac_add_del': {'is_add': 1, },
    'bier_disp_entry_add_del': {'next_hop_rpf_id': -1, 'next_hop_is_ip4': 1,
                                'is_add': 1, },
    'bier_disp_table_add_del': {'is_add': 1, },
    'bier_imp_add': {'is_add': 1, },
    'bier_route_add_del': {'is_add': 1, },
    'bier_table_add_del': {'is_add': 1, },
    'bridge_domain_add_del': {'flood': 1, 'uu_flood': 1, 'forward': 1,
                              'learn': 1, 'is_add': 1, },
    'classify_add_del_table': {'match_n_vectors': 1, 'table_index': 4294967295,
                               'nbuckets': 2, 'memory_size': 2097152,
                               'next_table_index': 4294967295,
                               'miss_next_index': 4294967295, },
    'dhcp6_client_enable_disable': {'enable': 1, },
    'dhcp6_clients_enable_disable': {'enable': 1, },
    'dhcp6_pd_client_enable_disable': {'enable': 1, },
    'dhcp6_send_client_message': {'server_index': 4294967295, 'mrc': 1, },
    'dhcp_client_config': {'is_add': 1, 'set_broadcast_flag': 1, },
    'dhcp_proxy_config': {'is_add': 1, },
    'dhcp_proxy_set_vss': {'vss_type': 255, 'is_add': 1, },
    'dslite_add_del_pool_addr_range': {'is_add': 1, },
    'gbp_subnet_add_del': {'sw_if_index': 4294967295, 'epg_id': 65535, },
    'geneve_add_del_tunnel': {'mcast_sw_if_index': 4294967295, 'is_add': 1,
                              'decap_next_index': 4294967295, },
    'gre_add_del_tunnel': {'instance': 4294967295, 'is_add': 1, },
    'gtpu_add_del_tunnel': {'is_add': 1, 'mcast_sw_if_index': 4294967295,
                            'decap_next_index': 4294967295, },
    'input_acl_set_interface': {'ip4_table_index': 4294967295,
                                'ip6_table_index': 4294967295,
                                'l2_table_index': 4294967295, },
    'ip6_add_del_address_using_prefix': {'is_add': 1, },
    'ip6nd_send_router_solicitation': {'irt': 1, 'mrt': 120, },
    'ip_add_del_route': {'next_hop_sw_if_index': 4294967295,
                         'next_hop_weight': 1, 'next_hop_via_label': 1048576,
                         'next_hop_id': 4294967295,
                         'classify_table_index': 4294967295, 'is_add': 1, },
    'ip_mroute_add_del': {'is_add': 1, },
    'ip_neighbor_add_del': {'is_add': 1, },
    'ip_punt_police': {'is_add': 1, },
    'ip_punt_redirect': {'is_add': 1, },
    'ip_table_add_del': {'is_add': 1, },
    'ip_unnumbered_dump': {'sw_if_index': 4294967295, },
    'ipip_add_tunnel': {'is_ipv6': 1, 'instance': 4294967295, },
    'ipsec_interface_add_del_spd': {'is_add': 1, },
    'ipsec_sad_entry_add_del': {'is_add': 1, },
    'ipsec_spd_add_del': {'is_add': 1, },
    'ipsec_spd_dump': {'sa_id': 4294967295, },
    'ipsec_spd_entry_add_del': {'local_port_stop': 65535,
                                'remote_port_stop': 65535, 'priority': 100,
                                'is_outbound': 1,
                                'is_add': 1, },
    'ipsec_tunnel_if_add_del': {'is_add': 1, 'anti_replay': 1, },
    'l2_emulation': {'enable': 1, },
    'l2fib_add_del': {'is_add': 1, },
    'lb_conf': {'sticky_buckets_per_core': 4294967295,
                'flow_timeout': 4294967295},
    'lisp_add_del_adjacency': {'is_add': 1, },
    'lisp_add_del_local_eid': {'is_add': 1, },
    'lisp_add_del_locator': {'priority': 1, 'weight': 1, 'is_add': 1, },
    'lisp_add_del_locator_set': {'is_add': 1, },
    'lisp_add_del_remote_mapping': {'is_add': 1, },
    'macip_acl_add_replace': {'acl_index': 4294967295, },
    'macip_acl_dump': {'acl_index': 4294967295, },
    'macip_acl_interface_add_del': {'is_add': 1, },
    'mpls_ip_bind_unbind': {'is_ip4': 1, 'is_bind': 1, },
    'mpls_route_add_del': {'mr_next_hop_sw_if_index': 4294967295,
                           'mr_next_hop_weight': 1,
                           'mr_next_hop_via_label': 1048576,
                           'mr_is_add': 1,
                           'mr_classify_table_index': 4294967295, },
    'mpls_table_add_del': {'is_add': 1, },
    'mpls_tunnel_add_del': {'next_hop_sw_if_index': 4294967295,
                            'next_hop_weight': 1,
                            'next_hop_via_label': 1048576,
                            'is_add': 1, },
    'mpls_tunnel_dump': {'sw_if_index': 4294967295, },
    'nat44_add_del_address_range': {'is_add': 1, 'vrf_id': 4294967295, },
    'nat44_add_del_identity_mapping': {'ip': b'0', 'sw_if_index': 4294967295,
                                       'addr_only': 1, 'is_add': 1, },
    'nat44_add_del_interface_addr': {'is_add': 1, },
    'nat44_add_del_lb_static_mapping': {'is_add': 1, },
    'nat44_add_del_static_mapping': {'external_sw_if_index': 4294967295,
                                     'addr_only': 1, 'is_add': 1, },
    'nat44_del_session': {'is_in': 1, },
    'nat44_interface_add_del_feature': {'is_inside': 1, 'is_add': 1, },
    'nat44_interface_add_del_output_feature': {'is_inside': 1, 'is_add': 1, },
    'nat44_lb_static_mapping_add_del_local': {'is_add': 1, },
    'nat64_add_del_interface': {'is_inside': 1, 'is_add': 1, },
    'nat64_add_del_interface_addr': {'is_add': 1, },
    'nat64_add_del_pool_addr_range': {'vrf_id': 4294967295, 'is_add': 1, },
    'nat64_add_del_prefix': {'is_add': 1, },
    'nat64_add_del_static_bib': {'is_add': 1, },
    'nat64_bib_dump': {'protocol': 255, },
    'nat64_st_dump': {'protocol': 255, },
    'nat66_add_del_interface': {'is_inside': 1, 'is_add': 1, },
    'nat66_add_del_static_mapping': {'is_add': 1, },
    'nat_det_add_del_map': {'is_add': 1, },
    'nat_ha_resync': {'want_resync_event': 1, },
    'nat_ha_set_failover': {'refresh': 10, },
    'nat_ha_set_listener': {'path_mtu': 512, },
    'nat_ipfix_enable_disable': {'domain_id': 1, 'src_port': 4739,
                                 'enable': 1, },
    'nat_set_mss_clamping': {'mss_value': 1500, },
    'nat_set_reass': {'timeout': 2, 'max_reass': 1024, 'max_frag': 5, },
    'nat_set_timeouts': {'udp': 300, 'tcp_established': 7440,
                         'tcp_transitory': 240, 'icmp': 60, },
    'output_acl_set_interface': {'ip4_table_index': 4294967295,
                                 'ip6_table_index': 4294967295,
                                 'l2_table_index': 4294967295, },
    'pppoe_add_del_session': {'is_add': 1, },
    'policer_add_del': {'is_add': 1, 'conform_action_type': 1, },
    'proxy_arp_add_del': {'is_add': 1, },
    'proxy_arp_intfc_enable_disable': {'is_enable': 1, },
    'punt_socket_register': {'protocol': 17, 'header_version': 1,
                             'is_ip4': 1, },
    'punt_socket_deregister': {'protocol': 17, 'is_ip4': 1, },
    'punt_socket_dump': {'is_ip6': 1, },
    'set_ip_flow_hash': {'src': 1, 'dst': 1, 'sport': 1, 'dport': 1,
                         'proto': 1, },
    'set_ipfix_exporter': {'collector_port': 4739, },
    'sr_localsid_add_del': {'sw_if_index': 4294967295, },
    'sr_policy_add': {'weight': 1, 'is_encap': 1, },
    'svs_enable_disable': {'is_enable': 1, },
    'svs_route_add_del': {'is_add': 1, },
    'svs_table_add_del': {'is_add': 1, },
    'sw_interface_add_del_address': {'is_add': 1, },
    'sw_interface_ip6nd_ra_prefix': {'val_lifetime': 4294967295,
                                     'pref_lifetime': 4294967295, },
    'sw_interface_set_ip_directed_broadcast': {'enable': 1, },
    'sw_interface_set_l2_bridge': {'enable': 1, },
    'sw_interface_set_mpls_enable': {'enable': 1, },
    'sw_interface_set_mtu': {'mtu': [0, 0, 0, 0], },
    'sw_interface_set_unnumbered': {'is_add': 1, },
    'sw_interface_span_enable_disable': {'state': 1, },
    'vxlan_add_del_tunnel': {'mcast_sw_if_index': 4294967295, 'is_add': 1,
                             'decap_next_index': 4294967295,
                             'instance': 4294967295, },
    'vxlan_gbp_tunnel_add_del': {'mcast_sw_if_index': 4294967295, 'is_add': 1,
                                 'instance': 4294967295, },
    'vxlan_gbp_tunnel_dump': {'sw_if_index': 4294967295, },
    'vxlan_gpe_add_del_tunnel': {'mcast_sw_if_index': 4294967295, 'is_add': 1,
                                 'protocol': 3, },
    'want_bfd_events': {'enable_disable': 1, },
    'want_dhcp6_pd_reply_events': {'enable_disable': 1, },
    'want_dhcp6_reply_events': {'enable_disable': 1, },
    'want_igmp_events': {'enable': 1, },
    'want_interface_events': {'enable_disable': 1, },
    'want_ip4_arp_events': {'enable_disable': 1, 'ip': '0.0.0.0', },
    'want_ip6_nd_events': {'enable_disable': 1, 'ip': '::', },
    'want_ip6_ra_events': {'enable_disable': 1, },
    'want_l2_macs_events': {'enable_disable': 1, },
}


class UnexpectedApiReturnValueError(Exception):
    """ exception raised when the API return value is unexpected """
    pass


class VppPapiProvider(object):
    """VPP-api provider using vpp-papi

    @property hook: hook object providing before and after api/cli hooks
    """

    _zero, _negative = range(2)

    def __init__(self, name, shm_prefix, test_class, read_timeout):
        self.hook = Hook(test_class)
        self.name = name
        self.shm_prefix = shm_prefix
        self.test_class = test_class
        self._expect_api_retval = self._zero
        self._expect_stack = []

        install_dir = os.getenv('VPP_INSTALL_PATH')

        # Vapi requires 'VPP_API_DIR', not set when run from Makefile.
        if 'VPP_API_DIR' not in os.environ:
            os.environ['VPP_API_DIR'] = os.getenv('VPP_INSTALL_PATH')

        self.vpp = VPP(logger=test_class.logger,
                       read_timeout=read_timeout)
        self._events = deque()

    def __enter__(self):
        return self

    def assert_negative_api_retval(self):
        """ Expect API failure - used with with, e.g.:
            with self.vapi.assert_negative_api_retval():
                self.vapi.<api call expected to fail>
        """
        self._expect_stack.append(self._expect_api_retval)
        self._expect_api_retval = self._negative
        return self

    def assert_zero_api_retval(self):
        """ Expect API success - used with with, e.g.:
            with self.vapi.assert_negative_api_retval():
                self.vapi.<api call expected to succeed>

            note: this is useful only inside another with block
                  as success is the default expected value
        """
        self._expect_stack.append(self._expect_api_retval)
        self._expect_api_retval = self._zero
        return self

    def __exit__(self, exc_type, exc_value, traceback):
        self._expect_api_retval = self._expect_stack.pop()

    def register_hook(self, hook):
        """Replace hook registration with new hook

        :param hook:

        """
        self.hook = hook

    def collect_events(self):
        """ Collect all events from the internal queue and clear the queue. """
        e = self._events
        self._events = deque()
        return e

    def wait_for_event(self, timeout, name=None):
        """ Wait for and return next event. """
        if name:
            self.test_class.logger.debug("Expecting event '%s' within %ss",
                                         name, timeout)
        else:
            self.test_class.logger.debug("Expecting event within %ss",
                                         timeout)
        if self._events:
            self.test_class.logger.debug("Not waiting, event already queued")
        limit = time.time() + timeout
        while time.time() < limit:
            if self._events:
                e = self._events.popleft()
                if name and type(e).__name__ != name:
                    raise Exception(
                        "Unexpected event received: %s, expected: %s" %
                        (type(e).__name__, name))
                self.test_class.logger.debug("Returning event %s:%s" %
                                             (name, e))
                return e
            self.test_class.sleep(0)  # yield
        raise Exception("Event did not occur within timeout")

    def __call__(self, name, event):
        """ Enqueue event in the internal event queue. """
        # FIXME use the name instead of relying on type(e).__name__ ?
        # FIXME #2 if this throws, it is eaten silently, Ole?
        self.test_class.logger.debug("New event: %s: %s" % (name, event))
        self._events.append(event)

    def factory(self, name, apifn):
        def f(*a, **ka):
            fields = apifn._func.msg.fields

            # add positional and kw arguments
            d = ka
            for i, o in enumerate(fields[3:]):
                try:
                    d[o] = a[i]
                except:
                    break

            # Default override
            if name in defaultmapping:
                for k, v in iteritems(defaultmapping[name]):
                    if k in d:
                        continue
                    d[k] = v
            return self.api(apifn, d)

        return f

    def __getattribute__(self, name):
        try:
            method = super(VppPapiProvider, self).__getattribute__(name)
        except AttributeError:
            method = self.factory(name, getattr(self.papi, name))
            # lazily load the method so we don't need to call factory
            # again for this name.
            setattr(self, name, method)
        return method

    def connect(self):
        """Connect the API to VPP"""
        self.vpp.connect(self.name, self.shm_prefix)
        self.papi = self.vpp.api
        self.vpp.register_event_callback(self)

    def disconnect(self):
        """Disconnect the API from VPP"""
        self.vpp.disconnect()

    def api(self, api_fn, api_args, expected_retval=0):
        """ Call API function and check it's return value.
        Call the appropriate hooks before and after the API call

        :param api_fn: API function to call
        :param api_args: tuple of API function arguments
        :param expected_retval: Expected return value (Default value = 0)
        :returns: reply from the API

        """
        self.hook.before_api(api_fn.__name__, api_args)
        reply = api_fn(**api_args)
        if self._expect_api_retval == self._negative:
            if hasattr(reply, 'retval') and reply.retval >= 0:
                msg = "API call passed unexpectedly: expected negative " \
                      "return value instead of %d in %s" % \
                      (reply.retval, moves.reprlib.repr(reply))
                self.test_class.logger.info(msg)
                raise UnexpectedApiReturnValueError(msg)
        elif self._expect_api_retval == self._zero:
            if hasattr(reply, 'retval') and reply.retval != expected_retval:
                msg = "API call failed, expected %d return value instead " \
                      "of %d in %s" % (expected_retval, reply.retval,
                                       moves.reprlib.repr(reply))
                self.test_class.logger.info(msg)
                raise UnexpectedApiReturnValueError(msg)
        else:
            raise Exception("Internal error, unexpected value for "
                            "self._expect_api_retval %s" %
                            self._expect_api_retval)
        self.hook.after_api(api_fn.__name__, api_args)
        return reply

    def cli(self, cli):
        """ Execute a CLI, calling the before/after hooks appropriately.

        :param cli: CLI to execute
        :returns: CLI output

        """
        self.hook.before_cli(cli)
        cli += '\n'
        r = self.papi.cli_inband(cmd=cli)
        self.hook.after_cli(cli)
        if hasattr(r, 'reply'):
            return r.reply

    def ppcli(self, cli):
        """ Helper method to print CLI command in case of info logging level.

        :param cli: CLI to execute
        :returns: CLI output
        """
        return cli + "\n" + str(self.cli(cli))

    def want_ip4_arp_events(self, enable_disable=1, ip="0.0.0.0"):
        return self.api(self.papi.want_ip4_arp_events,
                        {'enable_disable': enable_disable,
                         'ip': ip,
                         'pid': os.getpid(), })

    def want_ip6_nd_events(self, enable_disable=1, ip="::"):
        return self.api(self.papi.want_ip6_nd_events,
                        {'enable_disable': enable_disable,
                         'ip': ip,
                         'pid': os.getpid(), })

    def want_ip6_ra_events(self, enable_disable=1):
        return self.api(self.papi.want_ip6_ra_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid(), })

    def ip6nd_send_router_solicitation(self, sw_if_index, irt=1, mrt=120,
                                       mrc=0, mrd=0):
        return self.api(self.papi.ip6nd_send_router_solicitation,
                        {'irt': irt,
                         'mrt': mrt,
                         'mrc': mrc,
                         'mrd': mrd,
                         'sw_if_index': sw_if_index})

    def want_interface_events(self, enable_disable=1):
        return self.api(self.papi.want_interface_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid(), })

    def want_l2_macs_events(self, enable_disable=1, scan_delay=0,
                            max_macs_in_event=0, learn_limit=0):
        return self.api(self.papi.want_l2_macs_events,
                        {'enable_disable': enable_disable,
                         'scan_delay': scan_delay,
                         'max_macs_in_event': max_macs_in_event,
                         'learn_limit': learn_limit,
                         'pid': os.getpid(), })

    def want_dhcp6_reply_events(self, enable_disable=1):
        return self.api(self.papi.want_dhcp6_reply_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid()})

    def want_dhcp6_pd_reply_events(self, enable_disable=1):
        return self.api(self.papi.want_dhcp6_pd_reply_events,
                        {'enable_disable': enable_disable,
                         'pid': os.getpid()})

    def dhcp6_pd_send_client_message(self, msg_type, sw_if_index, T1, T2,
                                     prefixes, server_index=0xFFFFFFFF,
                                     irt=0, mrt=0, mrc=1, mrd=0, stop=0,
                                     ):
        return self.api(self.papi.dhcp6_pd_send_client_message,
                        {'sw_if_index': sw_if_index,
                         'server_index': server_index,
                         'irt': irt,
                         'mrt': mrt,
                         'mrc': mrc,
                         'mrd': mrd,
                         'stop': stop,
                         'msg_type': msg_type,
                         'T1': T1,
                         'T2': T2,
                         'n_prefixes': len(prefixes),
                         'prefixes': prefixes})

    def dhcp6_client_enable_disable(self, sw_if_index, prefix_group='',
                                    enable=1):
        return self.api(self.papi.dhcp6_client_enable_disable,
                        {'sw_if_index': sw_if_index,
                         'enable': enable})

    def dhcp6_pd_client_enable_disable(self, sw_if_index, prefix_group='',
                                       enable=1):
        return self.api(self.papi.dhcp6_pd_client_enable_disable,
                        {'sw_if_index': sw_if_index,
                         'prefix_group': prefix_group,
                         'enable': enable})

    def ip6_add_del_address_using_prefix(self, sw_if_index, address,
                                         prefix_length, prefix_group,
                                         is_add=1):
        return self.api(self.papi.ip6_add_del_address_using_prefix,
                        {'sw_if_index': sw_if_index,
                         'prefix_group': prefix_group,
                         'address': address,
                         'prefix_length': prefix_length,
                         'is_add': is_add})

    def sw_interface_set_mac_address(self, sw_if_index, mac):
        return self.api(self.papi.sw_interface_set_mac_address,
                        {'sw_if_index': sw_if_index,
                         'mac_address': mac})

    def p2p_ethernet_add(self, sw_if_index, remote_mac, subif_id):
        """Create p2p ethernet subinterface

        :param sw_if_index: main (parent) interface
        :param remote_mac: client (remote) mac address

        """
        return self.api(
            self.papi.p2p_ethernet_add,
            {'parent_if_index': sw_if_index,
             'remote_mac': remote_mac,
             'subif_id': subif_id})

    def p2p_ethernet_del(self, sw_if_index, remote_mac):
        """Delete p2p ethernet subinterface

        :param sw_if_index: main (parent) interface
        :param remote_mac: client (remote) mac address

        """
        return self.api(
            self.papi.p2p_ethernet_del,
            {'parent_if_index': sw_if_index,
             'remote_mac': remote_mac})

    def create_vlan_subif(self, sw_if_index, vlan):
        """

        :param vlan:
        :param sw_if_index:

        """
        return self.api(self.papi.create_vlan_subif,
                        {'sw_if_index': sw_if_index,
                         'vlan_id': vlan})

    def create_loopback(self, mac=''):
        """

        :param mac: (Optional)
        """
        return self.api(self.papi.create_loopback,
                        {'mac_address': mac})

    def ip_neighbor_add_del(self,
                            sw_if_index,
                            mac_address,
                            ip_address,
                            is_add=1,
                            flags=0):
        """ Add neighbor MAC to IPv4 or IPv6 address.

        :param sw_if_index:
        :param mac_address:
        :param dst_address:
        :param is_add:  (Default value = 1)
        :param flags:  (Default value = 0/NONE)
        """
        return self.api(
            self.papi.ip_neighbor_add_del,
            {
                'is_add': is_add,
                'neighbor': {
                    'sw_if_index': sw_if_index,
                    'flags': flags,
                    'mac_address': mac_address,
                    'ip_address': ip_address
                }
            }
        )

    def proxy_arp_add_del(self,
                          low,
                          hi,
                          table_id=0,
                          is_add=1):
        """ Config Proxy Arp Range.

        :param low_address: Start address in the rnage to Proxy for
        :param hi_address: End address in the rnage to Proxy for
        :param vrf_id: The VRF/table in which to proxy
        """

        return self.api(
            self.papi.proxy_arp_add_del,
            {'proxy':
                {
                    'table_id': table_id,
                    'low': low,
                    'hi': hi,
                },
                'is_add': is_add})

    def proxy_arp_intfc_enable_disable(self,
                                       sw_if_index,
                                       is_enable=1):
        """ Enable/Disable an interface for proxy ARP requests

        :param sw_if_index: Interface
        :param enable_disable: Enable/Disable
        """

        return self.api(
            self.papi.proxy_arp_intfc_enable_disable,
            {'sw_if_index': sw_if_index,
             'enable_disable': is_enable
             }
        )

    def gre_add_del_tunnel(self,
                           src_address,
                           dst_address,
                           outer_fib_id=0,
                           tunnel_type=0,
                           instance=0xFFFFFFFF,
                           session_id=0,
                           is_add=1,
                           is_ip6=0):
        """ Add a GRE tunnel

        :param src_address:
        :param dst_address:
        :param outer_fib_id:  (Default value = 0)
        :param tunnel_type:  (Default value = 0)
        :param instance:  (Default value = 0xFFFFFFFF)
        :param session_id: (Defalt value = 0)
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        """

        return self.api(
            self.papi.gre_add_del_tunnel,
            {'is_add': is_add,
             'is_ipv6': is_ip6,
             'tunnel_type': tunnel_type,
             'instance': instance,
             'src_address': src_address,
             'dst_address': dst_address,
             'outer_fib_id': outer_fib_id,
             'session_id': session_id}
        )

    def udp_encap_add(self,
                      src_ip,
                      dst_ip,
                      src_port,
                      dst_port,
                      table_id=0):
        """ Add a GRE tunnel
        :param src_ip:
        :param dst_ip:
        :param src_port:
        :param dst_port:
        :param outer_fib_id:  (Default value = 0)
        """

        return self.api(
            self.papi.udp_encap_add,
            {
                'udp_encap': {
                    'src_ip': src_ip,
                    'dst_ip': dst_ip,
                    'src_port': src_port,
                    'dst_port': dst_port,
                    'table_id': table_id
                }
            })

    def mpls_table_add_del(
            self,
            table_id,
            is_add=1):
        """

        :param table_id
        :param is_add:  (Default value = 1)

        """

        return self.api(
            self.papi.mpls_table_add_del,
            {'mt_table_id': table_id,
             'mt_is_add': is_add})

    def mpls_ip_bind_unbind(
            self,
            label,
            dst_address,
            dst_address_length,
            table_id=0,
            ip_table_id=0,
            is_ip4=1,
            is_bind=1):
        """
        """
        return self.api(
            self.papi.mpls_ip_bind_unbind,
            {'mb_mpls_table_id': table_id,
             'mb_label': label,
             'mb_ip_table_id': ip_table_id,
             'mb_is_bind': is_bind,
             'mb_is_ip4': is_ip4,
             'mb_address_length': dst_address_length,
             'mb_address': dst_address})

    def mpls_tunnel_add_del(
            self,
            tun_sw_if_index,
            next_hop_proto_is_ip4,
            next_hop_address,
            next_hop_sw_if_index=0xFFFFFFFF,
            next_hop_table_id=0,
            next_hop_weight=1,
            next_hop_n_out_labels=0,
            next_hop_out_label_stack=[],
            next_hop_via_label=MPLS_LABEL_INVALID,
            is_add=1,
            l2_only=0,
            is_multicast=0):
        """

        :param dst_address_length:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param dst_address:
        :param next_hop_address:
        :param next_hop_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vrf_id:  (Default value = 0)
        :param lookup_in_vrf:  (Default value = 0)
        :param classify_table_index:  (Default value = 0xFFFFFFFF)
        :param is_add:  (Default value = 1)
        :param is_drop:  (Default value = 0)
        :param is_ipv6:  (Default value = 0)
        :param is_local:  (Default value = 0)
        :param is_classify:  (Default value = 0)
        :param is_multipath:  (Default value = 0)
        :param is_resolve_host:  (Default value = 0)
        :param is_resolve_attached:  (Default value = 0)
        :param next_hop_weight:  (Default value = 1)
        :param is_multicast:  (Default value = 0)

        """
        return self.api(
            self.papi.mpls_tunnel_add_del,
            {'mt_sw_if_index': tun_sw_if_index,
             'mt_is_add': is_add,
             'mt_l2_only': l2_only,
             'mt_is_multicast': is_multicast,
             'mt_next_hop_proto_is_ip4': next_hop_proto_is_ip4,
             'mt_next_hop_weight': next_hop_weight,
             'mt_next_hop': next_hop_address,
             'mt_next_hop_n_out_labels': next_hop_n_out_labels,
             'mt_next_hop_sw_if_index': next_hop_sw_if_index,
             'mt_next_hop_table_id': next_hop_table_id,
             'mt_next_hop_via_label': next_hop_via_label,
             'mt_next_hop_out_label_stack': next_hop_out_label_stack})

    def nat44_interface_add_del_feature(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT44 feature on the interface

        :param sw_if_index: Software index of the interface
        :param is_inside: 1 if inside, 0 if outside (Default value = 1)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_interface_add_del_feature,
            {'is_add': is_add,
             'is_inside': is_inside,
             'sw_if_index': sw_if_index})

    def nat44_interface_add_del_output_feature(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT44 output feature on the interface

        :param sw_if_index: Software index of the interface
        :param is_inside: 1 if inside, 0 if outside (Default value = 1)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_interface_add_del_output_feature,
            {'is_add': is_add,
             'is_inside': is_inside,
             'sw_if_index': sw_if_index})

    def nat44_add_del_static_mapping(
            self,
            local_ip,
            external_ip=0,
            external_sw_if_index=0xFFFFFFFF,
            local_port=0,
            external_port=0,
            addr_only=1,
            vrf_id=0,
            protocol=0,
            twice_nat=0,
            self_twice_nat=0,
            out2in_only=0,
            tag="",
            is_add=1):
        """Add/delete NAT44 static mapping

        :param local_ip: Local IP address
        :param external_ip: External IP address
        :param external_sw_if_index: External interface instead of IP address
        :param local_port: Local port number (Default value = 0)
        :param external_port: External port number (Default value = 0)
        :param addr_only: 1 if address only mapping, 0 if address and port
        :param vrf_id: VRF ID
        :param protocol: IP protocol (Default value = 0)
        :param twice_nat: 1 if translate external host address and port
        :param self_twice_nat: 1 if translate external host address and port
                               whenever external host address equals
                               local address of internal host
        :param out2in_only: if 1 rule is matching only out2in direction
        :param tag: Opaque string tag
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_static_mapping,
            {'is_add': is_add,
             'addr_only': addr_only,
             'local_ip_address': local_ip,
             'external_ip_address': external_ip,
             'local_port': local_port,
             'external_port': external_port,
             'external_sw_if_index': external_sw_if_index,
             'vrf_id': vrf_id,
             'protocol': protocol,
             'twice_nat': twice_nat,
             'self_twice_nat': self_twice_nat,
             'out2in_only': out2in_only,
             'tag': tag})

    def nat44_add_del_identity_mapping(
            self,
            ip=b'0',
            sw_if_index=0xFFFFFFFF,
            port=0,
            addr_only=1,
            vrf_id=0,
            protocol=0,
            tag='',
            is_add=1):
        """Add/delete NAT44 identity mapping

        :param ip: IP address (Default value = 0)
        :param sw_if_index: Interface instead of IP address
        :param port: Port number (Default value = 0)
        :param addr_only: 1 if address only mapping, 0 if address and port
        :param vrf_id: VRF ID
        :param protocol: IP protocol (Default value = 0)
        :param tag: Opaque string tag
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_identity_mapping,
            {'is_add': is_add,
             'addr_only': addr_only,
             'ip_address': ip,
             'port': port,
             'sw_if_index': sw_if_index,
             'vrf_id': vrf_id,
             'tag': tag,
             'protocol': protocol})

    def nat44_add_del_address_range(
            self,
            first_ip_address,
            last_ip_address,
            is_add=1,
            vrf_id=0xFFFFFFFF,
            twice_nat=0):
        """Add/del NAT44 address range

        :param first_ip_address: First IP address
        :param last_ip_address: Last IP address
        :param vrf_id: VRF id for the address range
        :param twice_nat: twice NAT address for extenal hosts
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_address_range,
            {'first_ip_address': first_ip_address,
             'last_ip_address': last_ip_address,
             'vrf_id': vrf_id,
             'twice_nat': twice_nat,
             'is_add': is_add})

    def nat44_add_del_interface_addr(
            self,
            sw_if_index,
            twice_nat=0,
            is_add=1):
        """Add/del NAT44 address from interface

        :param sw_if_index: Software index of the interface
        :param twice_nat: twice NAT address for extenal hosts
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat44_add_del_interface_addr,
            {'is_add': is_add,
             'sw_if_index': sw_if_index,
             'twice_nat': twice_nat})

    def nat44_add_del_lb_static_mapping(
            self,
            external_addr,
            external_port,
            protocol,
            twice_nat=0,
            self_twice_nat=0,
            out2in_only=0,
            tag='',
            affinity=0,
            local_num=0,
            locals=[],
            is_add=1):
        """Add/delete NAT44 load balancing static mapping

        :param twice_nat: 1 if translate external host address and port
        :param tag: Opaque string tag
        :param affinity: if 0 disabled, otherwise client IP affinity timeout
        :param is_add - 1 if add, 0 if delete
        """
        return self.api(
            self.papi.nat44_add_del_lb_static_mapping,
            {'is_add': is_add,
             'external_addr': external_addr,
             'external_port': external_port,
             'protocol': protocol,
             'twice_nat': twice_nat,
             'self_twice_nat': self_twice_nat,
             'out2in_only': out2in_only,
             'tag': tag,
             'affinity': affinity,
             'local_num': local_num,
             'locals': locals})

    def nat44_lb_static_mapping_add_del_local(
            self,
            external_addr,
            external_port,
            local_addr,
            local_port,
            protocol,
            probability,
            vrf_id=0,
            is_add=1):
        """Add/delete NAT44 load-balancing static mapping rule backend

        :param external_addr: external IPv4 address of the servic
        :param external_port: external L4 port number of the service
        :param local_addr: IPv4 address of the internal node
        :param local_port: L4 port number of the internal node
        :param protocol: IP protocol number
        :param probability: probability of the internal node
        :param vrf_id: VRF id of the internal node
        :param is_add: 1 if add, 0 if delete
        """
        return self.api(
            self.papi.nat44_lb_static_mapping_add_del_local,
            {'is_add': is_add,
             'external_addr': external_addr,
             'external_port': external_port,
             'local': {
                 'addr': local_addr,
                 'port': local_port,
                 'probability': probability,
                 'vrf_id': vrf_id},
             'protocol': protocol})

    def nat44_del_session(
            self,
            addr,
            port,
            protocol,
            vrf_id=0,
            is_in=1,
            ext_host_address=None,
            ext_host_port=0):
        """Delete NAT44 session

        :param addr: IPv4 address
        :param por: port number
        :param protocol: IP protocol number
        :param vrf_id: VRF ID
        :param is_in: 1 if inside network addres and port pari, 0 if outside
        :param ext_host_address: external host IPv4 address
        :param ext_host_port: external host port
        """
        if ext_host_address is None:
            return self.api(
                self.papi.nat44_del_session,
                {'address': addr,
                 'port': port,
                 'protocol': protocol,
                 'vrf_id': vrf_id,
                 'is_in': is_in})
        else:
            return self.api(
                self.papi.nat44_del_session,
                {'address': addr,
                 'port': port,
                 'protocol': protocol,
                 'vrf_id': vrf_id,
                 'is_in': is_in,
                 'ext_host_valid': 1,
                 'ext_host_address': ext_host_address,
                 'ext_host_port': ext_host_port})

    def nat44_forwarding_enable_disable(
            self,
            enable):
        """Enable/disable forwarding for NAT44

        :param enable: 1 for enable, 0 for disable
        """
        return self.api(
            self.papi.nat44_forwarding_enable_disable,
            {'enable': enable})

    def nat_det_add_del_map(
            self,
            in_addr,
            in_plen,
            out_addr,
            out_plen,
            is_add=1):
        """Add/delete deterministic NAT mapping

        :param is_add - 1 if add, 0 if delete
        :param in_addr - inside IP address
        :param in_plen - inside IP address prefix length
        :param out_addr - outside IP address
        :param out_plen - outside IP address prefix length
        """
        return self.api(
            self.papi.nat_det_add_del_map,
            {'is_add': is_add,
             'is_nat44': 1,
             'in_addr': in_addr,
             'in_plen': in_plen,
             'out_addr': out_addr,
             'out_plen': out_plen})

    def nat_det_forward(
            self,
            in_addr):
        """Get outside address and port range from inside address

        :param in_addr - inside IP address
        """
        return self.api(
            self.papi.nat_det_forward,
            {'in_addr': in_addr,
             'is_nat44': 1})

    def nat_det_reverse(
            self,
            out_addr,
            out_port):
        """Get inside address from outside address and port

        :param out_addr - outside IP address
        :param out_port - outside port
        """
        return self.api(
            self.papi.nat_det_reverse,
            {'out_addr': out_addr,
             'out_port': out_port})

    def nat_det_map_dump(self):
        """Dump deterministic NAT mappings

        :return: Dictionary of deterministic NAT mappings
        """
        return self.api(self.papi.nat_det_map_dump, {})

    def nat_set_mss_clamping(self, enable=0, mss_value=1500):
        """Set TCP MSS rewriting configuration

        :param enable: disable(0)/enable(1) MSS rewriting feature
        :param mss_value: MSS value to be used for MSS rewriting
        """
        return self.api(
            self.papi.nat_set_mss_clamping,
            {'enable': enable, 'mss_value': mss_value})

    def nat_det_close_session_in(
            self,
            in_addr,
            in_port,
            ext_addr,
            ext_port):
        """Close deterministic NAT session using inside address and port

        :param in_addr - inside IP address
        :param in_port - inside port
        :param ext_addr - external host IP address
        :param ext_port - external host port
        """
        return self.api(
            self.papi.nat_det_close_session_in,
            {'in_addr': in_addr,
             'in_port': in_port,
             'ext_addr': ext_addr,
             'ext_port': ext_port,
             'is_nat44': 1})

    def nat_det_session_dump(
            self,
            user_addr):
        """Dump deterministic NAT sessions belonging to a user

        :param user_addr - inside IP address of the user
        :return: Dictionary of deterministic NAT sessions
        """
        return self.api(
            self.papi.nat_det_session_dump,
            {'is_nat44': 1,
             'user_addr': user_addr})

    def nat64_add_del_interface(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT64 feature on the interface
           :param sw_if_index: Index of the interface
           :param is_inside: 1 if inside, 0 if outside (Default value = 1)
           :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat64_add_del_interface,
            {'sw_if_index': sw_if_index,
             'is_inside': is_inside,
             'is_add': is_add})

    def nat64_add_del_static_bib(
            self,
            in_ip,
            out_ip,
            in_port,
            out_port,
            protocol,
            vrf_id=0,
            is_add=1):
        """Add/delete S-NAT static BIB entry

        :param in_ip: Inside IPv6 address
        :param out_ip: Outside IPv4 address
        :param in_port: Inside port number
        :param out_port: Outside port number
        :param protocol: IP protocol
        :param vrf_id: VRF ID (Default value = 0)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat64_add_del_static_bib,
            {'i_addr': in_ip,
             'o_addr': out_ip,
             'i_port': in_port,
             'o_port': out_port,
             'vrf_id': vrf_id,
             'proto': protocol,
             'is_add': is_add})

    def nat64_bib_dump(self, protocol=255):
        """Dump NAT64 BIB

        :param protocol: IP protocol (Default value = 255, all BIBs)
        :returns: Dictionary of NAT64 BIB entries
        """
        return self.api(self.papi.nat64_bib_dump, {'proto': protocol})

    def nat64_st_dump(self, protocol=255):
        """Dump NAT64 session table

        :param protocol: IP protocol (Default value = 255, all STs)
        :returns: Dictionary of NAT64 sesstion table entries
        """
        return self.api(self.papi.nat64_st_dump, {'proto': protocol})

    def nat64_add_del_prefix(self, prefix, plen, vrf_id=0, is_add=1):
        """Add/del NAT64 prefix

        :param prefix: NAT64 prefix
        :param plen: NAT64 prefix length
        :param vrf_id: VRF id of tenant (Default 0)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat64_add_del_prefix,
            {'prefix': prefix,
             'prefix_len': plen,
             'vrf_id': vrf_id,
             'is_add': is_add})

    def nat64_add_del_interface_addr(
            self,
            sw_if_index,
            is_add=1):
        """Add/del NAT64 address from interface

        :param sw_if_index: Software index of the interface
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(self.papi.nat64_add_del_interface_addr,
                        {'is_add': is_add, 'sw_if_index': sw_if_index})

    def dslite_set_aftr_addr(self, ip6, ip4):
        """Set DS-Lite AFTR addresses

        :param ip4: IPv4 address
        :param ip6: IPv6 address
        """
        return self.api(
            self.papi.dslite_set_aftr_addr,
            {'ip4_addr': ip4,
             'ip6_addr': ip6})

    def dslite_set_b4_addr(self, ip6, ip4):
        """Set DS-Lite B4 IPv6 address

        :param ip4: IPv4 address
        :param ip6: IPv6 address
        """
        return self.api(
            self.papi.dslite_set_b4_addr,
            {'ip4_addr': ip4,
             'ip6_addr': ip6})

    def nat66_add_del_interface(
            self,
            sw_if_index,
            is_inside=1,
            is_add=1):
        """Enable/disable NAT66 feature on the interface
           :param sw_if_index: Index of the interface
           :param is_inside: 1 if inside, 0 if outside (Default value = 1)
           :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat66_add_del_interface,
            {'sw_if_index': sw_if_index,
             'is_inside': is_inside,
             'is_add': is_add})

    def nat66_add_del_static_mapping(
            self,
            in_ip,
            out_ip,
            vrf_id=0,
            is_add=1):
        """Add/delete NAT66 static mapping

        :param in_ip: Inside IPv6 address
        :param out_ip: Outside IPv6 address
        :param vrf_id: VRF ID (Default value = 0)
        :param is_add: 1 if add, 0 if delete (Default value = 1)
        """
        return self.api(
            self.papi.nat66_add_del_static_mapping,
            {'local_ip_address': in_ip,
             'external_ip_address': out_ip,
             'vrf_id': vrf_id,
             'is_add': is_add})

    def nat_ha_set_listener(self, addr, port, path_mtu=512):
        """Set HA listener (local settings)

        :param addr: local IP4 address
        :param port: local UDP port number
        :param path_mtu: path MTU (Default value = 512)
        """
        return self.api(self.papi.nat_ha_set_listener,
                        {'ip_address': addr,
                         'port': port,
                         'path_mtu': path_mtu})

    def nat_ha_get_listener(self):
        """Get HA listener/local configuration"""
        return self.api(self.papi.nat_ha_get_listener, {})

    def nat_ha_set_failover(self, addr, port, refresh=10):
        """Set HA failover (remote settings)

        :param addr: failover IP4 address
        :param port: failvoer UDP port number
        :param refresh: number of seconds after which to send session refresh
        """
        return self.api(self.papi.nat_ha_set_failover,
                        {'ip_address': addr,
                         'port': port,
                         'session_refresh_interval': refresh})

    def nat_ha_resync(self, want_resync_event=1):
        """Resync HA (resend existing sessions to new failover)
        :param want_resync_event: if non-zero resync completed event sent
        """
        return self.api(self.papi.nat_ha_resync,
                        {'want_resync_event': want_resync_event,
                         'pid': os.getpid()})

    def bfd_udp_add(self, sw_if_index, desired_min_tx, required_min_rx,
                    detect_mult, local_addr, peer_addr, is_ipv6=0,
                    bfd_key_id=None, conf_key_id=None):
        if bfd_key_id is None:
            return self.api(self.papi.bfd_udp_add,
                            {
                                'sw_if_index': sw_if_index,
                                'desired_min_tx': desired_min_tx,
                                'required_min_rx': required_min_rx,
                                'local_addr': local_addr,
                                'peer_addr': peer_addr,
                                'is_ipv6': is_ipv6,
                                'detect_mult': detect_mult,
                            })
        else:
            return self.api(self.papi.bfd_udp_add,
                            {
                                'sw_if_index': sw_if_index,
                                'desired_min_tx': desired_min_tx,
                                'required_min_rx': required_min_rx,
                                'local_addr': local_addr,
                                'peer_addr': peer_addr,
                                'is_ipv6': is_ipv6,
                                'detect_mult': detect_mult,
                                'is_authenticated': 1,
                                'bfd_key_id': bfd_key_id,
                                'conf_key_id': conf_key_id,
                            })

    def bfd_udp_mod(self, sw_if_index, desired_min_tx, required_min_rx,
                    detect_mult, local_addr, peer_addr, is_ipv6=0):
        return self.api(self.papi.bfd_udp_mod,
                        {
                            'sw_if_index': sw_if_index,
                            'desired_min_tx': desired_min_tx,
                            'required_min_rx': required_min_rx,
                            'local_addr': local_addr,
                            'peer_addr': peer_addr,
                            'is_ipv6': is_ipv6,
                            'detect_mult': detect_mult,
                        })

    def bfd_udp_auth_activate(self, sw_if_index, local_addr, peer_addr,
                              is_ipv6=0, bfd_key_id=None, conf_key_id=None,
                              is_delayed=False):
        return self.api(self.papi.bfd_udp_auth_activate,
                        {
                            'sw_if_index': sw_if_index,
                            'local_addr': local_addr,
                            'peer_addr': peer_addr,
                            'is_ipv6': is_ipv6,
                            'is_delayed': 1 if is_delayed else 0,
                            'bfd_key_id': bfd_key_id,
                            'conf_key_id': conf_key_id,
                        })

    def bfd_udp_session_set_flags(self, admin_up_down, sw_if_index, local_addr,
                                  peer_addr, is_ipv6=0):
        return self.api(self.papi.bfd_udp_session_set_flags, {
            'admin_up_down': admin_up_down,
            'sw_if_index': sw_if_index,
            'local_addr': local_addr,
            'peer_addr': peer_addr,
            'is_ipv6': is_ipv6,
        })

    def want_bfd_events(self, enable_disable=1):
        return self.api(self.papi.want_bfd_events, {
            'enable_disable': enable_disable,
            'pid': os.getpid(),
        })

    def bfd_auth_set_key(self, conf_key_id, auth_type, key):
        return self.api(self.papi.bfd_auth_set_key, {
            'conf_key_id': conf_key_id,
            'auth_type': auth_type,
            'key': key,
            'key_len': len(key),
        })

    def classify_add_del_table(
            self,
            is_add,
            mask,
            match_n_vectors=1,
            table_index=0xFFFFFFFF,
            nbuckets=2,
            memory_size=2097152,
            skip_n_vectors=0,
            next_table_index=0xFFFFFFFF,
            miss_next_index=0xFFFFFFFF,
            current_data_flag=0,
            current_data_offset=0):
        """
        :param is_add:
        :param mask:
        :param match_n_vectors: (Default value = 1)
        :param table_index: (Default value = 0xFFFFFFFF)
        :param nbuckets:  (Default value = 2)
        :param memory_size:  (Default value = 2097152)
        :param skip_n_vectors:  (Default value = 0)
        :param next_table_index:  (Default value = 0xFFFFFFFF)
        :param miss_next_index:  (Default value = 0xFFFFFFFF)
        :param current_data_flag:  (Default value = 0)
        :param current_data_offset:  (Default value = 0)
        """

        mask_len = ((len(mask) - 1) / 16 + 1) * 16
        mask = mask + '\0' * (mask_len - len(mask))
        return self.api(
            self.papi.classify_add_del_table,
            {'is_add': is_add,
             'table_index': table_index,
             'nbuckets': nbuckets,
             'memory_size': memory_size,
             'skip_n_vectors': skip_n_vectors,
             'match_n_vectors': match_n_vectors,
             'next_table_index': next_table_index,
             'miss_next_index': miss_next_index,
             'current_data_flag': current_data_flag,
             'current_data_offset': current_data_offset,
             'mask_len': mask_len,
             'mask': mask})

    def classify_add_del_session(
            self,
            is_add,
            table_index,
            match,
            opaque_index=0xFFFFFFFF,
            hit_next_index=0xFFFFFFFF,
            advance=0,
            action=0,
            metadata=0):
        """
        :param is_add:
        :param table_index:
        :param match:
        :param opaque_index:  (Default value = 0xFFFFFFFF)
        :param hit_next_index:  (Default value = 0xFFFFFFFF)
        :param advance:  (Default value = 0)
        :param action:  (Default value = 0)
        :param metadata:  (Default value = 0)
        """

        match_len = ((len(match) - 1) / 16 + 1) * 16
        match = match + '\0' * (match_len - len(match))
        return self.api(
            self.papi.classify_add_del_session,
            {'is_add': is_add,
             'table_index': table_index,
             'hit_next_index': hit_next_index,
             'opaque_index': opaque_index,
             'advance': advance,
             'action': action,
             'metadata': metadata,
             'match_len': match_len,
             'match': match})

    def input_acl_set_interface(
            self,
            is_add,
            sw_if_index,
            ip4_table_index=0xFFFFFFFF,
            ip6_table_index=0xFFFFFFFF,
            l2_table_index=0xFFFFFFFF):
        """
        :param is_add:
        :param sw_if_index:
        :param ip4_table_index:  (Default value = 0xFFFFFFFF)
        :param ip6_table_index:  (Default value = 0xFFFFFFFF)
        :param l2_table_index:  (Default value = 0xFFFFFFFF)
        """

        return self.api(
            self.papi.input_acl_set_interface,
            {'sw_if_index': sw_if_index,
             'ip4_table_index': ip4_table_index,
             'ip6_table_index': ip6_table_index,
             'l2_table_index': l2_table_index,
             'is_add': is_add})

    def output_acl_set_interface(
            self,
            is_add,
            sw_if_index,
            ip4_table_index=0xFFFFFFFF,
            ip6_table_index=0xFFFFFFFF,
            l2_table_index=0xFFFFFFFF):
        """
        :param is_add:
        :param sw_if_index:
        :param ip4_table_index:  (Default value = 0xFFFFFFFF)
        :param ip6_table_index:  (Default value = 0xFFFFFFFF)
        :param l2_table_index:  (Default value = 0xFFFFFFFF)
        """

        return self.api(
            self.papi.output_acl_set_interface,
            {'sw_if_index': sw_if_index,
             'ip4_table_index': ip4_table_index,
             'ip6_table_index': ip6_table_index,
             'l2_table_index': l2_table_index,
             'is_add': is_add})

    def set_ipfix_exporter(
            self,
            collector_address,
            src_address,
            path_mtu,
            template_interval,
            vrf_id=0,
            collector_port=4739,
            udp_checksum=0):
        return self.api(
            self.papi.set_ipfix_exporter,
            {
                'collector_address': collector_address,
                'collector_port': collector_port,
                'src_address': src_address,
                'vrf_id': vrf_id,
                'path_mtu': path_mtu,
                'template_interval': template_interval,
                'udp_checksum': udp_checksum,
            })

    def dhcp_proxy_config(self,
                          dhcp_server,
                          dhcp_src_address,
                          rx_table_id=0,
                          server_table_id=0,
                          is_add=1,
                          is_ipv6=0):
        return self.api(
            self.papi.dhcp_proxy_config,
            {
                'rx_vrf_id': rx_table_id,
                'server_vrf_id': server_table_id,
                'is_ipv6': is_ipv6,
                'is_add': is_add,
                'dhcp_server': dhcp_server,
                'dhcp_src_address': dhcp_src_address,
            })

    def dhcp_proxy_set_vss(self,
                           table_id,
                           vss_type=255,
                           vpn_ascii_id="",
                           oui=0,
                           vpn_index=0,
                           is_add=1,
                           is_ip6=0):
        return self.api(
            self.papi.dhcp_proxy_set_vss,
            {
                'tbl_id': table_id,
                'vss_type': vss_type,
                'vpn_ascii_id': vpn_ascii_id,
                'oui': oui,
                'vpn_index': vpn_index,
                'is_add': is_add,
                'is_ipv6': is_ip6,
            })

    def dhcp_client_config(self,
                           sw_if_index,
                           hostname,
                           client_id='',
                           is_add=1,
                           set_broadcast_flag=1,
                           want_dhcp_events=0):
        return self.api(
            self.papi.dhcp_client_config,
            {
                'is_add': is_add,
                'client': {
                    'sw_if_index': sw_if_index,
                    'hostname': hostname,
                    'id': client_id,
                    'want_dhcp_event': want_dhcp_events,
                    'set_broadcast_flag': set_broadcast_flag,
                    'pid': os.getpid()}
            })

    def ip_mroute_add_del(self,
                          src_address,
                          grp_address,
                          grp_address_length,
                          e_flags,
                          next_hop_afi,
                          next_hop_sw_if_index,
                          next_hop_address,
                          i_flags,
                          bier_imp=0,
                          rpf_id=0,
                          table_id=0,
                          is_add=1,
                          is_ipv6=0,
                          is_local=0):
        """
        IP Multicast Route add/del
        """
        return self.api(
            self.papi.ip_mroute_add_del,
            {'next_hop_sw_if_index': next_hop_sw_if_index,
             'entry_flags': e_flags,
             'itf_flags': i_flags,
             'table_id': table_id,
             'rpf_id': rpf_id,
             'is_add': is_add,
             'is_ipv6': is_ipv6,
             'is_local': is_local,
             'bier_imp': bier_imp,
             'next_hop_afi': next_hop_afi,
             'grp_address_length': grp_address_length,
             'grp_address': grp_address,
             'src_address': src_address,
             'nh_address': next_hop_address})

    def lisp_enable_disable(self, is_enabled):
        return self.api(
            self.papi.lisp_enable_disable,
            {
                'is_en': is_enabled,
            })

    def lisp_add_del_locator_set(self,
                                 ls_name,
                                 is_add=1):
        return self.api(
            self.papi.lisp_add_del_locator_set,
            {
                'is_add': is_add,
                'locator_set_name': ls_name
            })

    def lisp_add_del_locator(self,
                             ls_name,
                             sw_if_index,
                             priority=1,
                             weight=1,
                             is_add=1):
        return self.api(
            self.papi.lisp_add_del_locator,
            {
                'is_add': is_add,
                'locator_set_name': ls_name,
                'sw_if_index': sw_if_index,
                'priority': priority,
                'weight': weight
            })

    def lisp_locator_dump(self, is_index_set, ls_name=None, ls_index=0):
        return self.api(
            self.papi.lisp_locator_dump,
            {
                'is_index_set': is_index_set,
                'ls_name': ls_name,
                'ls_index': ls_index,
            })

    def lisp_add_del_local_eid(self,
                               ls_name,
                               eid_type,
                               eid,
                               prefix_len,
                               vni=0,
                               key_id=0,
                               key="",
                               is_add=1):
        return self.api(
            self.papi.lisp_add_del_local_eid,
            {
                'locator_set_name': ls_name,
                'is_add': is_add,
                'eid_type': eid_type,
                'eid': eid,
                'prefix_len': prefix_len,
                'vni': vni,
                'key_id': key_id,
                'key': key
            })

    def lisp_eid_table_dump(self,
                            eid_set=0,
                            prefix_length=0,
                            vni=0,
                            eid_type=0,
                            eid=None,
                            filter_opt=0):
        return self.api(
            self.papi.lisp_eid_table_dump,
            {
                'eid_set': eid_set,
                'prefix_length': prefix_length,
                'vni': vni,
                'eid_type': eid_type,
                'eid': eid,
                'filter': filter_opt,
            })

    def lisp_add_del_remote_mapping(self,
                                    eid_type,
                                    eid,
                                    eid_prefix_len=0,
                                    vni=0,
                                    rlocs=[],
                                    rlocs_num=0,
                                    is_src_dst=0,
                                    is_add=1):
        return self.api(
            self.papi.lisp_add_del_remote_mapping,
            {
                'is_add': is_add,
                'eid_type': eid_type,
                'eid': eid,
                'eid_len': eid_prefix_len,
                'rloc_num': rlocs_num,
                'rlocs': rlocs,
                'vni': vni,
                'is_src_dst': is_src_dst,
            })

    def lisp_add_del_adjacency(self,
                               leid,
                               reid,
                               leid_len,
                               reid_len,
                               eid_type,
                               is_add=1,
                               vni=0):
        return self.api(
            self.papi.lisp_add_del_adjacency,
            {
                'is_add': is_add,
                'vni': vni,
                'eid_type': eid_type,
                'leid': leid,
                'reid': reid,
                'leid_len': leid_len,
                'reid_len': reid_len,
            })

    def gtpu_add_del_tunnel(
            self,
            src_addr,
            dst_addr,
            is_add=1,
            is_ipv6=0,
            mcast_sw_if_index=0xFFFFFFFF,
            encap_vrf_id=0,
            decap_next_index=0xFFFFFFFF,
            teid=0):
        """

        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param src_addr:
        :param dst_addr:
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param encap_vrf_id:  (Default value = 0)
        :param decap_next_index:  (Default value = 0xFFFFFFFF)
        :param teid:  (Default value = 0)

        """
        return self.api(self.papi.gtpu_add_del_tunnel,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'src_address': src_addr,
                         'dst_address': dst_addr,
                         'mcast_sw_if_index': mcast_sw_if_index,
                         'encap_vrf_id': encap_vrf_id,
                         'decap_next_index': decap_next_index,
                         'teid': teid})

    def vxlan_gpe_add_del_tunnel(
            self,
            src_addr,
            dst_addr,
            mcast_sw_if_index=0xFFFFFFFF,
            is_add=1,
            is_ipv6=0,
            encap_vrf_id=0,
            decap_vrf_id=0,
            protocol=3,
            vni=0):
        """

        :param local:
        :param remote:
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param encap_vrf_id:  (Default value = 0)
        :param decap_vrf_id:  (Default value = 0)
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param protocol:  (Default value = 3)
        :param vni:  (Default value = 0)

        """
        return self.api(self.papi.vxlan_gpe_add_del_tunnel,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'local': src_addr,
                         'remote': dst_addr,
                         'mcast_sw_if_index': mcast_sw_if_index,
                         'encap_vrf_id': encap_vrf_id,
                         'decap_vrf_id': decap_vrf_id,
                         'protocol': protocol,
                         'vni': vni})

    def vxlan_gbp_tunnel_add_del(
            self,
            src,
            dst,
            mcast_sw_if_index=0xFFFFFFFF,
            is_add=1,
            is_ipv6=0,
            encap_table_id=0,
            vni=0,
            mode=1,
            instance=0xFFFFFFFF):
        """

        :param dst_addr:
        :param src_addr:
        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param encap_table_id:  (Default value = 0)
        :param decap_next_index:  (Default value = 0xFFFFFFFF)
        :param mcast_sw_if_index:  (Default value = 0xFFFFFFFF)
        :param vni:  (Default value = 0)
        :param instance:  (Default value = 0xFFFFFFFF)

        """
        return self.api(self.papi.vxlan_gbp_tunnel_add_del,
                        {'is_add': is_add,
                         'tunnel': {
                             'src': src,
                             'dst': dst,
                             'mcast_sw_if_index': mcast_sw_if_index,
                             'encap_table_id': encap_table_id,
                             'vni': vni,
                             'instance': instance,
                             "mode": mode}})

    def vxlan_gbp_tunnel_dump(self, sw_if_index=0xffffffff):
        return self.api(self.papi.vxlan_gbp_tunnel_dump,
                        {'sw_if_index': sw_if_index,
                         '_no_type_conversion': True})

    def pppoe_add_del_session(
            self,
            client_ip,
            client_mac,
            session_id=0,
            is_add=1,
            is_ipv6=0,
            decap_vrf_id=0):
        """

        :param is_add:  (Default value = 1)
        :param is_ipv6:  (Default value = 0)
        :param client_ip:
        :param session_id:  (Default value = 0)
        :param client_mac:
        :param decap_vrf_id:  (Default value = 0)

        """
        return self.api(self.papi.pppoe_add_del_session,
                        {'is_add': is_add,
                         'is_ipv6': is_ipv6,
                         'session_id': session_id,
                         'client_ip': client_ip,
                         'decap_vrf_id': decap_vrf_id,
                         'client_mac': client_mac})

    def sr_mpls_policy_add(self, bsid, weight, type, segments):
        return self.api(self.papi.sr_mpls_policy_add,
                        {'bsid': bsid,
                         'weight': weight,
                         'type': type,
                         'n_segments': len(segments),
                         'segments': segments})

    def sr_mpls_policy_del(self, bsid):
        return self.api(self.papi.sr_mpls_policy_del,
                        {'bsid': bsid})

    def sr_localsid_add_del(self,
                            localsid,
                            behavior,
                            nh_addr4,
                            nh_addr6,
                            is_del=0,
                            end_psp=0,
                            sw_if_index=0xFFFFFFFF,
                            vlan_index=0,
                            fib_table=0,
                            ):
        """ Add/del IPv6 SR local-SID.

        :param localsid:
        :param behavior: END=1; END.X=2; END.DX2=4; END.DX6=5;
        :param behavior: END.DX4=6; END.DT6=7; END.DT4=8
        :param nh_addr4:
        :param nh_addr6:
        :param is_del:  (Default value = 0)
        :param end_psp: (Default value = 0)
        :param sw_if_index: (Default value = 0xFFFFFFFF)
        :param vlan_index:  (Default value = 0)
        :param fib_table:   (Default value = 0)
        """
        return self.api(
            self.papi.sr_localsid_add_del,
            {'is_del': is_del,
             'localsid': localsid,
             'end_psp': end_psp,
             'behavior': behavior,
             'sw_if_index': sw_if_index,
             'vlan_index': vlan_index,
             'fib_table': fib_table,
             'nh_addr4': nh_addr4,
             'nh_addr6': nh_addr6
             }
        )

    def sr_policy_add(
            self,
            bsid_addr,
            weight=1,
            is_encap=1,
            type=0,
            fib_table=0,
            n_segments=0,
            segments=[]):
        """
        :param bsid_addr: bindingSID of the SR Policy
        :param weight: weight of the sid list. optional. (default: 1)
        :param is_encap: (bool) whether SR policy should Encap or SRH insert \
            (default: Encap)
        :param type: type/behavior of the SR policy. (default or spray) \
            (default: default)
        :param fib_table: VRF where to install the FIB entry for the BSID \
            (default: 0)
        :param n_segments: number of segments \
            (default: 0)
        :param segments: a vector of IPv6 address composing the segment list \
            (default: [])
        """
        return self.api(
            self.papi.sr_policy_add,
            {'bsid_addr': bsid_addr,
             'weight': weight,
             'is_encap': is_encap,
             'type': type,
             'fib_table': fib_table,
             'n_segments': n_segments,
             'segments': segments
             }
        )

    def sr_policy_del(
            self,
            bsid_addr,
            sr_policy_index=0):
        """
        :param bsid: bindingSID of the SR Policy
        :param sr_policy_index: index of the sr policy (default: 0)
        """
        return self.api(
            self.papi.sr_policy_del,
            {'bsid_addr': bsid_addr,
             'sr_policy_index': sr_policy_index
             })

    def sr_steering_add_del(
            self,
            is_del,
            bsid_addr,
            sr_policy_index,
            table_id,
            prefix_addr,
            mask_width,
            sw_if_index,
            traffic_type):
        """
        Steer traffic L2 and L3 traffic through a given SR policy

        :param is_del: delete or add
        :param bsid_addr: bindingSID of the SR Policy (alt to sr_policy_index)
        :param sr_policy: is the index of the SR Policy (alt to bsid)
        :param table_id: is the VRF where to install the FIB entry for the BSID
        :param prefix_addr: is the IPv4/v6 address for L3 traffic type
        :param mask_width: is the mask for L3 traffic type
        :param sw_if_index: is the incoming interface for L2 traffic
        :param traffic_type: type of traffic (IPv4: 4, IPv6: 6, L2: 2)
        """
        return self.api(
            self.papi.sr_steering_add_del,
            {'is_del': is_del,
             'bsid_addr': bsid_addr,
             'sr_policy_index': sr_policy_index,
             'table_id': table_id,
             'prefix_addr': prefix_addr,
             'mask_width': mask_width,
             'sw_if_index': sw_if_index,
             'traffic_type': traffic_type
             })

    def acl_add_replace(self, acl_index, r, tag='',
                        expected_retval=0):
        """Add/replace an ACL
        :param int acl_index: ACL index to replace, 2^32-1 to create new ACL.
        :param acl_rule r: ACL rules array.
        :param str tag: symbolic tag (description) for this ACL.
        :param int count: number of rules.
        """
        return self.api(self.papi.acl_add_replace,
                        {'acl_index': acl_index,
                         'r': r,
                         'count': len(r),
                         'tag': tag},
                        expected_retval=expected_retval)

    def acl_del(self, acl_index, expected_retval=0):
        """

        :param acl_index:
        :return:
        """
        return self.api(self.papi.acl_del,
                        {'acl_index': acl_index},
                        expected_retval=expected_retval)

    def acl_interface_set_acl_list(self, sw_if_index, n_input, acls,
                                   expected_retval=0):
        return self.api(self.papi.acl_interface_set_acl_list,
                        {'sw_if_index': sw_if_index,
                         'count': len(acls),
                         'n_input': n_input,
                         'acls': acls},
                        expected_retval=expected_retval)

    def acl_interface_set_etype_whitelist(self, sw_if_index,
                                          n_input, whitelist,
                                          expected_retval=0):
        return self.api(self.papi.acl_interface_set_etype_whitelist,
                        {'sw_if_index': sw_if_index,
                         'count': len(whitelist),
                         'n_input': n_input,
                         'whitelist': whitelist},
                        expected_retval=expected_retval)

    def acl_interface_add_del(self,
                              sw_if_index,
                              acl_index,
                              is_add=1):
        """ Add/Delete ACL to/from interface

        :param sw_if_index:
        :param acl_index:
        :param is_add:  (Default value = 1)
        """

        return self.api(self.papi.acl_interface_add_del,
                        {'is_add': is_add,
                         'is_input': 1,
                         'sw_if_index': sw_if_index,
                         'acl_index': acl_index})

    def acl_dump(self, acl_index, expected_retval=0):
        return self.api(self.papi.acl_dump,
                        {'acl_index': acl_index},
                        expected_retval=expected_retval)

    def acl_interface_list_dump(self, sw_if_index=0xFFFFFFFF,
                                expected_retval=0):
        return self.api(self.papi.acl_interface_list_dump,
                        {'sw_if_index': sw_if_index},
                        expected_retval=expected_retval)

    def macip_acl_add(self, rules, tag=""):
        """ Add MACIP acl

        :param rules: list of rules for given acl
        :param tag: acl tag
        """

        return self.api(self.papi.macip_acl_add,
                        {'r': rules,
                         'count': len(rules),
                         'tag': tag})

    def macip_acl_add_replace(self, rules, acl_index=0xFFFFFFFF, tag=""):
        """ Add MACIP acl

        :param rules: list of rules for given acl
        :param tag: acl tag
        """

        return self.api(self.papi.macip_acl_add_replace,
                        {'acl_index': acl_index,
                         'r': rules,
                         'count': len(rules),
                         'tag': tag})

    def macip_acl_interface_add_del(self,
                                    sw_if_index,
                                    acl_index,
                                    is_add=1):
        """ Add MACIP acl to interface

        :param sw_if_index:
        :param acl_index:
        :param is_add:  (Default value = 1)
        """

        return self.api(self.papi.macip_acl_interface_add_del,
                        {'is_add': is_add,
                         'sw_if_index': sw_if_index,
                         'acl_index': acl_index})

    def macip_acl_dump(self, acl_index=4294967295):
        """ Return MACIP acl dump
        """

        return self.api(
            self.papi.macip_acl_dump, {'acl_index': acl_index})

    def policer_add_del(self,
                        name,
                        cir,
                        eir,
                        cb,
                        eb,
                        is_add=1,
                        rate_type=0,
                        round_type=0,
                        ptype=0,
                        color_aware=0,
                        conform_action_type=1,
                        conform_dscp=0,
                        exceed_action_type=0,
                        exceed_dscp=0,
                        violate_action_type=0,
                        violate_dscp=0):
        return self.api(self.papi.policer_add_del,
                        {'name': name,
                         'cir': cir,
                         'eir': eir,
                         'cb': cb,
                         'eb': eb,
                         'is_add': is_add,
                         'rate_type': rate_type,
                         'round_type': round_type,
                         'type': ptype,
                         'color_aware': color_aware,
                         'conform_action_type': conform_action_type,
                         'conform_dscp': conform_dscp,
                         'exceed_action_type': exceed_action_type,
                         'exceed_dscp': exceed_dscp,
                         'violate_action_type': violate_action_type,
                         'violate_dscp': violate_dscp})

    def ip_punt_police(self,
                       policer_index,
                       is_ip6=0,
                       is_add=1):
        return self.api(self.papi.ip_punt_police,
                        {'policer_index': policer_index,
                         'is_add': is_add,
                         'is_ip6': is_ip6})

    def ip_punt_redirect(self,
                         rx_sw_if_index,
                         tx_sw_if_index,
                         address,
                         is_add=1):
        return self.api(self.papi.ip_punt_redirect,
                        {'punt': {'rx_sw_if_index': rx_sw_if_index,
                                  'tx_sw_if_index': tx_sw_if_index,
                                  'nh': address},
                         'is_add': is_add})

    def ip_punt_redirect_dump(self, sw_if_index, is_ipv6=0):
        return self.api(self.papi.ip_punt_redirect_dump,
                        {'sw_if_index': sw_if_index,
                         'is_ipv6': is_ipv6})

    def bier_table_add_del(self,
                           bti,
                           mpls_label,
                           is_add=1):
        """ BIER Table add/del """
        return self.api(
            self.papi.bier_table_add_del,
            {'bt_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id},
             'bt_label': mpls_label,
             'bt_is_add': is_add})

    def bier_table_dump(self):
        return self.api(self.papi.bier_table_dump, {})

    def bier_route_add_del(self,
                           bti,
                           bp,
                           paths,
                           is_add=1,
                           is_replace=0):
        """ BIER Route add/del """
        return self.api(
            self.papi.bier_route_add_del,
            {'br_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id},
             'br_bp': bp,
             'br_n_paths': len(paths),
             'br_paths': paths,
             'br_is_add': is_add,
             'br_is_replace': is_replace})

    def bier_route_dump(self, bti):
        return self.api(
            self.papi.bier_route_dump,
            {'br_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id}})

    def bier_imp_add(self,
                     bti,
                     src,
                     ibytes,
                     is_add=1):
        """ BIER Imposition Add """
        return self.api(
            self.papi.bier_imp_add,
            {'bi_tbl_id': {"bt_set": bti.set_id,
                           "bt_sub_domain": bti.sub_domain_id,
                           "bt_hdr_len_id": bti.hdr_len_id},
             'bi_src': src,
             'bi_n_bytes': len(ibytes),
             'bi_bytes': ibytes})

    def bier_imp_del(self, bi_index):
        """ BIER Imposition del """
        return self.api(
            self.papi.bier_imp_del,
            {'bi_index': bi_index})

    def bier_imp_dump(self):
        return self.api(self.papi.bier_imp_dump, {})

    def bier_disp_table_add_del(self,
                                bdti,
                                is_add=1):
        """ BIER Disposition Table add/del """
        return self.api(
            self.papi.bier_disp_table_add_del,
            {'bdt_tbl_id': bdti,
             'bdt_is_add': is_add})

    def bier_disp_table_dump(self):
        return self.api(self.papi.bier_disp_table_dump, {})

    def bier_disp_entry_add_del(self,
                                bdti,
                                bp,
                                payload_proto,
                                next_hop_afi,
                                next_hop,
                                next_hop_tbl_id=0,
                                next_hop_rpf_id=~0,
                                next_hop_is_ip4=1,
                                is_add=1):
        """ BIER Route add/del """
        lstack = []
        while (len(lstack) < 16):
            lstack.append({})
        return self.api(
            self.papi.bier_disp_entry_add_del,
            {'bde_tbl_id': bdti,
             'bde_bp': bp,
             'bde_payload_proto': payload_proto,
             'bde_n_paths': 1,
             'bde_paths': [{'next_hop': next_hop,
                            'table_id': next_hop_tbl_id,
                            'afi': next_hop_afi,
                            'rpf_id': next_hop_rpf_id,
                            'n_labels': 0,
                            'label_stack': lstack}],
             'bde_is_add': is_add})

    def bier_disp_entry_dump(self, bdti):
        return self.api(
            self.papi.bier_disp_entry_dump,
            {'bde_tbl_id': bdti})

    def session_enable_disable(self, is_enabled):
        return self.api(
            self.papi.session_enable_disable,
            {'is_enable': is_enabled})

    def ipsec_spd_add_del(self, spd_id, is_add=1):
        """ SPD add/del - Wrapper to add or del ipsec SPD
        Sample CLI : 'ipsec spd add 1'

        :param spd_id - SPD ID to be created in the vpp . mandatory
        :param is_add - create (1) or delete(0) SPD (Default 1 - add) .
              optional
        :returns: reply from the API
        """
        return self.api(
            self.papi.ipsec_spd_add_del, {
                'spd_id': spd_id, 'is_add': is_add})

    def ipsec_spds_dump(self):
        return self.api(self.papi.ipsec_spds_dump, {})

    def ipsec_interface_add_del_spd(self, spd_id, sw_if_index, is_add=1):
        """ IPSEC interface SPD add/del - \
             Wrapper to associate/disassociate SPD to interface in VPP
        Sample CLI : 'set interface ipsec spd GigabitEthernet0/6/0 1'

        :param spd_id - SPD ID to associate with the interface . mandatory
        :param sw_if_index - Interface Index which needs to ipsec \
            association mandatory
        :param is_add - add(1) or del(0) association with interface \
                (Default 1 - add) . optional
        :returns: reply from the API
        """
        return self.api(
            self.papi.ipsec_interface_add_del_spd,
            {'spd_id': spd_id, 'sw_if_index': sw_if_index, 'is_add': is_add})

    def ipsec_spd_interface_dump(self, spd_index=None):
        return self.api(self.papi.ipsec_spd_interface_dump,
                        {'spd_index': spd_index if spd_index else 0,
                         'spd_index_valid': 1 if spd_index else 0})

    def ipsec_sad_entry_add_del(self,
                                sad_id,
                                spi,
                                integrity_algorithm,
                                integrity_key,
                                crypto_algorithm,
                                crypto_key,
                                protocol,
                                tunnel_src_address='',
                                tunnel_dst_address='',
                                flags=0,
                                is_add=1):
        """ IPSEC SA add/del
        :param sad_id: security association ID
        :param spi: security param index of the SA in decimal
        :param integrity_algorithm:
        :param integrity_key:
        :param crypto_algorithm:
        :param crypto_key:
        :param protocol: AH(0) or ESP(1) protocol
        :param tunnel_src_address: tunnel mode outer src address
        :param tunnel_dst_address: tunnel mode outer dst address
        :param is_add:
        :param is_tunnel:
        :** reference /vpp/src/vnet/ipsec/ipsec.h file for enum values of
             crypto and ipsec algorithms
        """
        return self.api(
            self.papi.ipsec_sad_entry_add_del,
            {
                'is_add': is_add,
                'entry':
                    {
                        'sad_id': sad_id,
                        'spi': spi,
                        'tunnel_src': tunnel_src_address,
                        'tunnel_dst': tunnel_dst_address,
                        'protocol': protocol,
                        'integrity_algorithm': integrity_algorithm,
                        'integrity_key': {
                            'length': len(integrity_key),
                            'data': integrity_key,
                        },
                        'crypto_algorithm': crypto_algorithm,
                        'crypto_key': {
                            'length': len(crypto_key),
                            'data': crypto_key,
                        },
                        'flags': flags,
                    }
            })

    def ipsec_sa_dump(self, sa_id=None):
        return self.api(self.papi.ipsec_sa_dump,
                        {'sa_id': sa_id if sa_id else 0xffffffff})

    def ipsec_spd_entry_add_del(self,
                                spd_id,
                                sa_id,
                                local_address_start,
                                local_address_stop,
                                remote_address_start,
                                remote_address_stop,
                                local_port_start=0,
                                local_port_stop=65535,
                                remote_port_start=0,
                                remote_port_stop=65535,
                                protocol=0,
                                policy=0,
                                priority=100,
                                is_outbound=1,
                                is_add=1,
                                is_ipv6=0,
                                is_ip_any=0):
        """ IPSEC policy SPD add/del   -
                    Wrapper to configure ipsec SPD policy entries in VPP
        :param spd_id: SPD ID for the policy
        :param local_address_start: local-ip-range start address
        :param local_address_stop : local-ip-range stop address
        :param remote_address_start: remote-ip-range start address
        :param remote_address_stop : remote-ip-range stop address
        :param local_port_start: (Default value = 0)
        :param local_port_stop: (Default value = 65535)
        :param remote_port_start: (Default value = 0)
        :param remote_port_stop: (Default value = 65535)
        :param protocol: Any(0), AH(51) & ESP(50) protocol (Default value = 0)
        :param sa_id: Security Association ID for mapping it to SPD
        :param policy: bypass(0), discard(1), resolve(2) or protect(3) action
               (Default value = 0)
        :param priority: value for the spd action (Default value = 100)
        :param is_outbound: flag for inbound(0) or outbound(1)
               (Default value = 1)
        :param is_add: (Default value = 1)
        """
        return self.api(
            self.papi.ipsec_spd_entry_add_del,
            {
                'is_add': is_add,
                'entry':
                    {
                        'spd_id': spd_id,
                        'sa_id': sa_id,
                        'local_address_start': local_address_start,
                        'local_address_stop': local_address_stop,
                        'remote_address_start': remote_address_start,
                        'remote_address_stop': remote_address_stop,
                        'local_port_start': local_port_start,
                        'local_port_stop': local_port_stop,
                        'remote_port_start': remote_port_start,
                        'remote_port_stop': remote_port_stop,
                        'protocol': protocol,
                        'policy': policy,
                        'priority': priority,
                        'is_outbound': is_outbound,
                        'is_ip_any': is_ip_any
                    }
            })

    def ipsec_spd_dump(self, spd_id, sa_id=0xffffffff):
        return self.api(self.papi.ipsec_spd_dump,
                        {'spd_id': spd_id,
                         'sa_id': sa_id})

    def ipsec_tunnel_if_add_del(self, local_ip, remote_ip, local_spi,
                                remote_spi, crypto_alg, local_crypto_key,
                                remote_crypto_key, integ_alg, local_integ_key,
                                remote_integ_key, is_add=1, esn=0,
                                anti_replay=1, renumber=0, show_instance=0):
        return self.api(
            self.papi.ipsec_tunnel_if_add_del,
            {
                'local_ip': local_ip,
                'remote_ip': remote_ip,
                'local_spi': local_spi,
                'remote_spi': remote_spi,
                'crypto_alg': crypto_alg,
                'local_crypto_key_len': len(local_crypto_key),
                'local_crypto_key': local_crypto_key,
                'remote_crypto_key_len': len(remote_crypto_key),
                'remote_crypto_key': remote_crypto_key,
                'integ_alg': integ_alg,
                'local_integ_key_len': len(local_integ_key),
                'local_integ_key': local_integ_key,
                'remote_integ_key_len': len(remote_integ_key),
                'remote_integ_key': remote_integ_key,
                'is_add': is_add,
                'esn': esn,
                'anti_replay': anti_replay,
                'renumber': renumber,
                'show_instance': show_instance
            })

    def ipsec_select_backend(self, protocol, index):
        return self.api(self.papi.ipsec_select_backend,
                        {'protocol': protocol, 'index': index})

    def ipsec_backend_dump(self):
        return self.api(self.papi.ipsec_backend_dump, {})

    def app_namespace_add_del(self,
                              namespace_id,
                              ip4_fib_id=0,
                              ip6_fib_id=0,
                              sw_if_index=0xFFFFFFFF,
                              secret=0):
        return self.api(
            self.papi.app_namespace_add_del,
            {'secret': secret,
             'sw_if_index': sw_if_index,
             'ip4_fib_id': ip4_fib_id,
             'ip6_fib_id': ip6_fib_id,
             'namespace_id': namespace_id,
             'namespace_id_len': len(namespace_id)})

    def punt_socket_register(self, port, pathname, protocol=0x11,
                             header_version=1, is_ip4=1):
        """ Register punt socket """
        return self.api(self.papi.punt_socket_register,
                        {'header_version': header_version,
                         'punt': {'ipv': is_ip4,
                                  'l4_protocol': protocol,
                                  'l4_port': port},
                         'pathname': pathname})

    def punt_socket_deregister(self, port, protocol=0x11, is_ip4=1):
        """ Unregister punt socket """
        return self.api(self.papi.punt_socket_deregister,
                        {'punt': {'ipv': is_ip4,
                                  'l4_protocol': protocol,
                                  'l4_port': port}})

    def punt_socket_dump(self, is_ip6=1):
        """ Dump punt socket"""
        return self.api(self.papi.punt_socket_dump,
                        {'is_ipv6': is_ip6})

    def gbp_endpoint_add(self, sw_if_index, ips, mac, sclass, flags,
                         tun_src, tun_dst):
        """ GBP endpoint Add """
        return self.api(self.papi.gbp_endpoint_add,
                        {'endpoint': {
                            'sw_if_index': sw_if_index,
                            'ips': ips,
                            'n_ips': len(ips),
                            'mac': mac,
                            'sclass': sclass,
                            'flags': flags,
                            'tun': {
                                'src': tun_src,
                                'dst': tun_dst,
                            }}})

    def gbp_endpoint_del(self, handle):
        """ GBP endpoint Del """
        return self.api(self.papi.gbp_endpoint_del,
                        {'handle': handle})

    def gbp_endpoint_dump(self):
        """ GBP endpoint Dump """
        return self.api(self.papi.gbp_endpoint_dump,
                        {'_no_type_conversion': True})

    def gbp_endpoint_group_add(self, vnid, sclass, bd,
                               rd, uplink_sw_if_index,
                               retention):
        """ GBP endpoint group Add """
        return self.api(self.papi.gbp_endpoint_group_add,
                        {'epg':
                            {
                                'uplink_sw_if_index': uplink_sw_if_index,
                                'bd_id': bd,
                                'rd_id': rd,
                                'vnid': vnid,
                                'sclass': sclass,
                                'retention': retention
                            }})

    def gbp_endpoint_group_del(self, sclass):
        """ GBP endpoint group Del """
        return self.api(self.papi.gbp_endpoint_group_del,
                        {'sclass': sclass})

    def gbp_bridge_domain_add(self, bd_id, flags,
                              bvi_sw_if_index,
                              uu_fwd_sw_if_index,
                              bm_flood_sw_if_index):
        """ GBP bridge-domain Add """
        return self.api(self.papi.gbp_bridge_domain_add,
                        {'bd':
                            {
                                'flags': flags,
                                'bvi_sw_if_index': bvi_sw_if_index,
                                'uu_fwd_sw_if_index': uu_fwd_sw_if_index,
                                'bm_flood_sw_if_index': bm_flood_sw_if_index,
                                'bd_id': bd_id
                            }})

    def gbp_bridge_domain_del(self, bd_id):
        """ GBP bridge-domain Del """
        return self.api(self.papi.gbp_bridge_domain_del,
                        {'bd_id': bd_id})

    def gbp_route_domain_add(self, rd_id,
                             ip4_table_id,
                             ip6_table_id,
                             ip4_uu_sw_if_index,
                             ip6_uu_sw_if_index):
        """ GBP route-domain Add """
        return self.api(self.papi.gbp_route_domain_add,
                        {'rd':
                            {
                                'ip4_table_id': ip4_table_id,
                                'ip6_table_id': ip6_table_id,
                                'ip4_uu_sw_if_index': ip4_uu_sw_if_index,
                                'ip6_uu_sw_if_index': ip6_uu_sw_if_index,
                                'rd_id': rd_id
                            }})

    def gbp_route_domain_del(self, rd_id):
        """ GBP route-domain Del """
        return self.api(self.papi.gbp_route_domain_del,
                        {'rd_id': rd_id})

    def gbp_recirc_add_del(self, is_add, sw_if_index, sclass, is_ext):
        """ GBP recirc Add/Del """
        return self.api(self.papi.gbp_recirc_add_del,
                        {'is_add': is_add,
                         'recirc': {
                             'is_ext': is_ext,
                             'sw_if_index': sw_if_index,
                             'sclass': sclass}})

    def gbp_recirc_dump(self):
        """ GBP recirc Dump """
        return self.api(self.papi.gbp_recirc_dump, {})

    def gbp_ext_itf_add_del(self, is_add, sw_if_index, bd_id, rd_id):
        """ GBP recirc Add/Del """
        return self.api(self.papi.gbp_ext_itf_add_del,
                        {'is_add': is_add,
                         'ext_itf': {
                             'sw_if_index': sw_if_index,
                             'bd_id': bd_id,
                             'rd_id': rd_id}})

    def gbp_ext_itf_dump(self):
        """ GBP recirc Dump """
        return self.api(self.papi.gbp_ext_itf_dump, {})

    def gbp_subnet_add_del(self, is_add, rd_id,
                           prefix, type,
                           sw_if_index=0xffffffff,
                           sclass=0xffff):
        """ GBP Subnet Add/Del """
        return self.api(self.papi.gbp_subnet_add_del,
                        {'is_add': is_add,
                         'subnet': {
                             'type': type,
                             'sw_if_index': sw_if_index,
                             'sclass': sclass,
                             'prefix': prefix,
                             'rd_id': rd_id}})

    def gbp_subnet_dump(self):
        """ GBP Subnet Dump """
        return self.api(self.papi.gbp_subnet_dump,
                        {'_no_type_conversion': True})

    def gbp_contract_add_del(self, is_add, sclass, dclass, acl_index,
                             rules, allowed_ethertypes):
        """ GBP contract Add/Del """
        return self.api(self.papi.gbp_contract_add_del,
                        {'is_add': is_add,
                         'contract': {
                             'acl_index': acl_index,
                             'sclass': sclass,
                             'dclass': dclass,
                             'n_rules': len(rules),
                             'rules': rules,
                             'n_ether_types': len(allowed_ethertypes),
                             'allowed_ethertypes': allowed_ethertypes}})

    def gbp_contract_dump(self):
        """ GBP contract Dump """
        return self.api(self.papi.gbp_contract_dump, {})

    def gbp_vxlan_tunnel_add(self, vni, bd_rd_id, mode, src):
        """ GBP VXLAN tunnel add """
        return self.api(self.papi.gbp_vxlan_tunnel_add,
                        {
                            'tunnel': {
                                'vni': vni,
                                'mode': mode,
                                'bd_rd_id': bd_rd_id,
                                'src': src
                            }
                        })

    def gbp_vxlan_tunnel_del(self, vni):
        """ GBP VXLAN tunnel del """
        return self.api(self.papi.gbp_vxlan_tunnel_del,
                        {
                            'vni': vni,
                        })

    def gbp_vxlan_tunnel_dump(self):
        """ GBP VXLAN tunnel add/del """
        return self.api(self.papi.gbp_vxlan_tunnel_dump, {})

    def qos_egress_map_update(self, id, outputs):
        """ QOS egress map update """
        return self.api(self.papi.qos_egress_map_update,
                        {'map_id': id,
                         'rows': outputs})

    def qos_egress_map_delete(self, id):
        """ QOS egress map delete """
        return self.api(self.papi.qos_egress_map_delete,
                        {'map_id': id})

    def qos_mark_enable_disable(self, sw_if_index,
                                output_source,
                                map_id,
                                enable):
        """ QOS Mark Enable/Disable """
        return self.api(self.papi.qos_mark_enable_disable,
                        {'map_id': map_id,
                         'sw_if_index': sw_if_index,
                         'output_source': output_source,
                         'enable': enable})

    def igmp_enable_disable(self, sw_if_index, enable, host):
        """ Enable/disable IGMP on a given interface """
        return self.api(self.papi.igmp_enable_disable,
                        {'enable': enable,
                         'mode': host,
                         'sw_if_index': sw_if_index})

    def igmp_proxy_device_add_del(self, vrf_id, sw_if_index, add):
        """ Add/del IGMP proxy device """
        return self.api(self.papi.igmp_proxy_device_add_del,
                        {'vrf_id': vrf_id, 'sw_if_index': sw_if_index,
                         'add': add})

    def igmp_proxy_device_add_del_interface(self, vrf_id, sw_if_index, add):
        """ Add/del interface to/from IGMP proxy device """
        return self.api(self.papi.igmp_proxy_device_add_del_interface,
                        {'vrf_id': vrf_id, 'sw_if_index': sw_if_index,
                         'add': add})

    def igmp_listen(self, filter, sw_if_index, saddrs, gaddr):
        """ Listen for new (S,G) on specified interface

        :param enable: add/del
        :param sw_if_index: interface sw index
        :param saddr: source ip4 addr
        :param gaddr: group ip4 addr
        """
        return self.api(self.papi.igmp_listen,
                        {
                            'group':
                                {
                                    'filter': filter,
                                    'sw_if_index': sw_if_index,
                                    'n_srcs': len(saddrs),
                                    'saddrs': saddrs,
                                    'gaddr': gaddr
                                }
                        })

    def igmp_clear_interface(self, sw_if_index):
        """ Remove all (S,G)s from specified interface
            doesn't send IGMP report!
        """
        return self.api(
            self.papi.igmp_clear_interface, {
                'sw_if_index': sw_if_index})

    def want_igmp_events(self, enable=1):
        return self.api(self.papi.want_igmp_events, {'enable': enable,
                                                     'pid': os.getpid()})

    def bond_create(
            self,
            mode,
            lb,
            use_custom_mac,
            mac_address='',
            interface_id=0xFFFFFFFF):
        """
        :param mode: mode
        :param lb: load balance
        :param use_custom_mac: use custom mac
        :param mac_address: mac address
        :param interface_id: custom interface ID
        """
        return self.api(
            self.papi.bond_create,
            {'mode': mode,
             'lb': lb,
             'use_custom_mac': use_custom_mac,
             'mac_address': mac_address,
             'id': interface_id
             })

    def pipe_delete(self, parent_sw_if_index):
        return self.api(self.papi.pipe_delete,
                        {'parent_sw_if_index': parent_sw_if_index})

    def memif_create(
            self,
            role,
            mode,
            rx_queues=None,
            tx_queues=None,
            _id=None,
            socket_id=None,
            secret=None,
            ring_size=None,
            buffer_size=None,
            hw_addr=None):
        return self.api(self.papi.memif_create,
                        {'role': role,
                         'mode': mode,
                         'rx_queues': rx_queues,
                         'tx_queues': tx_queues,
                         'id': _id,
                         'socket_id': socket_id,
                         'secret': secret,
                         'ring_size': ring_size,
                         'buffer_size': buffer_size,
                         'hw_addr': hw_addr})

    def svs_table_add_del(self, af, table_id, is_add=1):
        return self.api(self.papi.svs_table_add_del,
                        {
                            'table_id': table_id,
                            'is_add': is_add,
                            'af': af,
                        })

    def svs_route_add_del(self, table_id, prefix, src_table_id, is_add=1):
        return self.api(self.papi.svs_route_add_del,
                        {
                            'table_id': table_id,
                            'source_table_id': src_table_id,
                            'prefix': prefix,
                            'is_add': is_add,
                        })

    def svs_enable_disable(self, af, table_id, sw_if_index, is_enable=1):
        return self.api(self.papi.svs_enable_disable,
                        {
                            'af': af,
                            'table_id': table_id,
                            'sw_if_index': sw_if_index,
                            'is_enable': is_enable,
                        })