test/vpp_ip_route.py


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1/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
  Copyright (c) 2005 Eliot Dresselhaus

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#include <vppinfra/format.h>
#include <vppinfra/time.h>
#include <vppinfra/math.h>	/* for sqrt */

static int verbose;
#define if_verbose(format,args...) \
  if (verbose) { clib_warning(format, ## args); }

static int
test_time_main (unformat_input_t * input)
{
  f64 wait, error;
  f64 t, tu[3], ave, rms;
  clib_time_t c;
  int i, n, j;

  clib_time_init (&c);
  wait = 1e-3;
  n = 1000;
  unformat (input, "%f %d", &wait, &n);
  ave = rms = 0;
  tu[0] = unix_time_now ();
  tu[1] = unix_time_now ();
  for (i = 0; i < n; i++)
    {
      j = 0;
      t = clib_time_now (&c);
      while (clib_time_now (&c) < t + wait)
	j++;
      t = j;
      ave += t;
      rms += t * t;
    }
  tu[2] = unix_time_now ();
  ave /= n;
  rms = sqrt (rms / n - ave * ave);

  error = ((tu[2] - tu[1]) - 2 * (tu[1] - tu[0]) - n * wait) / n;
  if_verbose ("tested %d x %.6e sec waits, error %.6e loops %.6e +- %.6e\n",
	      n, wait, error, ave, rms);

  return 0;
}

#ifdef CLIB_UNIX
int
main (int argc, char *argv[])
{
  unformat_input_t i;
  int ret;

  clib_mem_init (0, 64ULL << 20);

  verbose = (argc > 1);
  unformat_init_command_line (&i, argv);
  ret = test_time_main (&i);
  unformat_free (&i);

  return ret;
}
#endif /* CLIB_UNIX */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
"""
  IP Routes

  object abstractions for representing IP routes in VPP
"""

from vpp_object import VppObject
from socket import inet_pton, inet_ntop, AF_INET, AF_INET6
from vpp_ip import DpoProto, INVALID_INDEX, VppIpAddressUnion, \
    VppIpMPrefix
from ipaddress import ip_address, IPv4Network, IPv6Network

# from vnet/vnet/mpls/mpls_types.h
MPLS_IETF_MAX_LABEL = 0xfffff
MPLS_LABEL_INVALID = MPLS_IETF_MAX_LABEL + 1

try:
    text_type = unicode
except NameError:
    text_type = str


class MRouteItfFlags:
    MFIB_ITF_FLAG_NONE = 0
    MFIB_ITF_FLAG_NEGATE_SIGNAL = 1
    MFIB_ITF_FLAG_ACCEPT = 2
    MFIB_ITF_FLAG_FORWARD = 4
    MFIB_ITF_FLAG_SIGNAL_PRESENT = 8
    MFIB_ITF_FLAG_INTERNAL_COPY = 16


class MRouteEntryFlags:
    MFIB_ENTRY_FLAG_NONE = 0
    MFIB_ENTRY_FLAG_SIGNAL = 1
    MFIB_ENTRY_FLAG_DROP = 2
    MFIB_ENTRY_FLAG_CONNECTED = 4
    MFIB_ENTRY_FLAG_INHERIT_ACCEPT = 8


class FibPathProto:
    FIB_PATH_NH_PROTO_IP4 = 0
    FIB_PATH_NH_PROTO_IP6 = 1
    FIB_PATH_NH_PROTO_MPLS = 2
    FIB_PATH_NH_PROTO_ETHERNET = 3
    FIB_PATH_NH_PROTO_BIER = 4
    FIB_PATH_NH_PROTO_NSH = 5


class FibPathType:
    FIB_PATH_TYPE_NORMAL = 0
    FIB_PATH_TYPE_LOCAL = 1
    FIB_PATH_TYPE_DROP = 2
    FIB_PATH_TYPE_UDP_ENCAP = 3
    FIB_PATH_TYPE_BIER_IMP = 4
    FIB_PATH_TYPE_ICMP_UNREACH = 5
    FIB_PATH_TYPE_ICMP_PROHIBIT = 6
    FIB_PATH_TYPE_SOURCE_LOOKUP = 7
    FIB_PATH_TYPE_DVR = 8
    FIB_PATH_TYPE_INTERFACE_RX = 9
    FIB_PATH_TYPE_CLASSIFY = 10


class FibPathFlags:
    FIB_PATH_FLAG_NONE = 0
    FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED = 1
    FIB_PATH_FLAG_RESOLVE_VIA_HOST = 2
    FIB_PATH_FLAG_POP_PW_CW = 4


class MplsLspMode:
    PIPE = 0
    UNIFORM = 1


def mk_network(addr, len):
    if ip_address(text_type(addr)).version == 4:
        return IPv4Network("%s/%d" % (addr, len), strict=False)
    else:
        return IPv6Network("%s/%d" % (addr, len), strict=False)


def ip_to_dpo_proto(addr):
    if addr.version == 6:
        return DpoProto.DPO_PROTO_IP6
    else:
        return DpoProto.DPO_PROTO_IP4


def address_proto(ip_addr):
    if ip_addr.ip_addr.version is 4:
        return FibPathProto.FIB_PATH_NH_PROTO_IP4
    else:
        return FibPathProto.FIB_PATH_NH_PROTO_IP6


def find_route(test, addr, len, table_id=0):
    prefix = mk_network(addr, len)

    if 4 is prefix.version:
        routes = test.vapi.ip_route_dump(table_id, False)
    else:
        routes = test.vapi.ip_route_dump(table_id, True)

    for e in routes:
        if table_id == e.route.table_id \
           and str(e.route.prefix) == str(prefix):
            return True
    return False


def find_route_in_dump(dump, route, table):
    for r in dump:
        if table.table_id == r.route.table_id \
           and route.prefix == r.route.prefix:
            if len(route.paths) == r.route.n_paths:
                return True
    return False


def find_mroute_in_dump(dump, route, table):
    for r in dump:
        if table.table_id == r.route.table_id \
           and route.prefix == r.route.prefix:
            return True
    return False


def find_mroute(test, grp_addr, src_addr, grp_addr_len,
                table_id=0):
    ip_mprefix = VppIpMPrefix(text_type(src_addr),
                              text_type(grp_addr),
                              grp_addr_len)

    if 4 is ip_mprefix.version:
        routes = test.vapi.ip_mroute_dump(table_id, False)
    else:
        routes = test.vapi.ip_mroute_dump(table_id, True)

    for e in routes:
        if table_id == e.route.table_id and ip_mprefix == e.route.prefix:
            return True
    return False


def find_mpls_route(test, table_id, label, eos_bit, paths=None):
    dump = test.vapi.mpls_route_dump(table_id)
    for e in dump:
        if label == e.mr_route.mr_label \
           and eos_bit == e.mr_route.mr_eos \
           and table_id == e.mr_route.mr_table_id:
            if not paths:
                return True
            else:
                if (len(paths) != len(e.mr_route.mr_paths)):
                    return False
                for i in range(len(paths)):
                    if (paths[i] != e.mr_route.mr_paths[i]):
                        return False
                return True
    return False


def fib_interface_ip_prefix(test, addr, len, sw_if_index):
    # can't use python net here since we need the host bits in the prefix
    prefix = "%s/%d" % (addr, len)
    addrs = test.vapi.ip_address_dump(
        sw_if_index,
        is_ipv6=(6 == ip_address(addr).version))

    for a in addrs:
        if a.sw_if_index == sw_if_index and \
           str(a.prefix) == prefix:
            return True
    return False


class VppIpTable(VppObject):

    def __init__(self,
                 test,
                 table_id,
                 is_ip6=0):
        self._test = test
        self.table_id = table_id
        self.is_ip6 = is_ip6

    def add_vpp_config(self):
        self._test.vapi.ip_table_add_del(is_add=1,
                                         table={'is_ip6': self.is_ip6,
                                                'table_id': self.table_id})
        self._test.registry.register(self, self._test.logger)
        return self

    def remove_vpp_config(self):
        self._test.vapi.ip_table_add_del(is_add=0,
                                         table={'is_ip6': self.is_ip6,
                                                'table_id': self.table_id})

    def replace_begin(self):
        self._test.vapi.ip_table_replace_begin(
            table={'is_ip6': self.is_ip6,
                   'table_id': self.table_id})

    def replace_end(self):
        self._test.vapi.ip_table_replace_end(
            table={'is_ip6': self.is_ip6,
                   'table_id': self.table_id})

    def flush(self):
        self._test.vapi.ip_table_flush(table={'is_ip6': self.is_ip6,
                                              'table_id': self.table_id})

    def dump(self):
        return self._test.vapi.ip_route_dump(self.table_id, self.is_ip6)

    def mdump(self):
        return self._test.vapi.ip_mroute_dump(self.table_id, self.is_ip6)

    def query_vpp_config(self):
        if self.table_id == 0:
            # the default table always exists
            return False
        # find the default route
        return find_route(self._test,
                          "::" if self.is_ip6 else "0.0.0.0",
                          0,
                          self.table_id)

    def object_id(self):
        return ("table-%s-%d" %
                ("v6" if self.is_ip6 == 1 else "v4",
                 self.table_id))


class VppIpInterfaceAddress(VppObject):

    def __init__(self, test, intf, addr, len):
        self._test = test
        self.intf = intf
        self.addr = addr
        self.len = len
        self.prefix = "%s/%d" % (addr, len)

    def add_vpp_config(self):
        self._test.vapi.sw_interface_add_del_address(
            sw_if_index=self.intf.sw_if_index, prefix=self.prefix,
            is_add=1)
        self._test.registry.register(self, self._test.logger)
        return self

    def remove_vpp_config(self):
        self._test.vapi.sw_interface_add_del_address(
            sw_if_index=self.intf.sw_if_index, prefix=self.prefix,
            is_add=0)

    def query_vpp_config(self):
        return fib_interface_ip_prefix(self._test,
                                       self.addr,
                                       self.len,
                                       self.intf.sw_if_index)

    def object_id(self):
        return "interface-ip-%s-%s" % (self.intf, self.prefix)


class VppIpInterfaceBind(VppObject):

    def __init__(self, test, intf, table):
        self._test = test
        self.intf = intf
        self.table = table

    def add_vpp_config(self):
        if self.table.is_ip6:
            self.intf.set_table_ip6(self.table.table_id)
        else:
            self.intf.set_table_ip4(self.table.table_id)
        self._test.registry.register(self, self._test.logger)

    def remove_vpp_config(self):
        if 0 == self.table.table_id:
            return
        if self.table.is_ip6:
            self.intf.set_table_ip6(0)
        else:
            self.intf.set_table_ip4(0)

    def query_vpp_config(self):
        if 0 == self.table.table_id:
            return False
        return self._test.vapi.sw_interface_get_table(
            self.intf.sw_if_index,
            self.table.is_ip6).vrf_id == self.table.table_id

    def object_id(self):
        return "interface-bind-%s-%s" % (self.intf, self.table)


class VppMplsLabel(object):
    def __init__(self, value, mode=MplsLspMode.PIPE, ttl=64, exp=0):
        self.value = value
        self.mode = mode
        self.ttl = ttl
        self.exp = exp

    def encode(self):
        is_uniform = 0 if self.mode is MplsLspMode.PIPE else 1
        return {'label': self.value,
                'ttl': self.ttl,
                'exp': self.exp,
                'is_uniform': is_uniform}

    def __eq__(self, other):
        if isinstance(other, self.__class__):
            return (self.value == other.value and
                    self.ttl == other.ttl and
                    self.exp == other.exp and
                    self.mode == other.mode)
        elif hasattr(other, 'label'):
            return (self.value == other.label and
                    self.ttl == other.ttl and
                    self.exp == other.exp and
                    (self.mode == MplsLspMode.UNIFORM) == other.is_uniform)
        else:
            return False

    def __ne__(self, other):
        return not (self == other)


class VppFibPathNextHop(object):
    def __init__(self, addr,
                 via_label=MPLS_LABEL_INVALID,
                 next_hop_id=INVALID_INDEX):
        self.addr = VppIpAddressUnion(addr)
        self.via_label = via_label
        self.obj_id = next_hop_id

    def encode(self):
        if self.via_label is not MPLS_LABEL_INVALID:
            return {'via_label': self.via_label}
        if self.obj_id is not INVALID_INDEX:
            return {'obj_id': self.obj_id}
        else:
            return {'address': self.addr.encode()}

    def proto(self):
        if self.via_label is MPLS_LABEL_INVALID:
            return address_proto(self.addr)
        else:
            return FibPathProto.FIB_PATH_NH_PROTO_MPLS

    def __eq__(self, other):
        if not isinstance(other, self.__class__):
            # try the other instance's __eq__.
            return NotImplemented
        return (self.addr == other.addr and
                self.via_label == other.via_label and
                self.obj_id == other.obj_id)


class VppRoutePath(object):

    def __init__(
            self,
            nh_addr,
            nh_sw_if_index,
            nh_table_id=0,
            labels=[],
            nh_via_label=MPLS_LABEL_INVALID,
            rpf_id=0,
            next_hop_id=INVALID_INDEX,
            proto=None,
            flags=FibPathFlags.FIB_PATH_FLAG_NONE,
            type=FibPathType.FIB_PATH_TYPE_NORMAL):
        self.nh_itf = nh_sw_if_index
        self.nh_table_id = nh_table_id
        self.nh_labels = labels
        self.weight = 1
        self.rpf_id = rpf_id
        self.proto = proto
        self.flags = flags
        self.type = type
        self.nh = VppFibPathNextHop(nh_addr, nh_via_label, next_hop_id)
        if proto is None:
            self.proto = self.nh.proto()
        else:
            self.proto = proto
        self.next_hop_id = next_hop_id

    def encode_labels(self):
        lstack = []
        for l in self.nh_labels:
            if type(l) == VppMplsLabel:
                lstack.append(l.encode())
            else:
                lstack.append({'label': l,
                               'ttl': 255})
        while (len(lstack) < 16):
            lstack.append({})

        return lstack

    def encode(self):
        return {'weight': 1,
                'preference': 0,
                'table_id': self.nh_table_id,
                'nh': self.nh.encode(),
                'next_hop_id': self.next_hop_id,
                'sw_if_index': self.nh_itf,
                'rpf_id': self.rpf_id,
                'proto': self.proto,
                'type': self.type,
                'flags': self.flags,
                'n_labels': len(self.nh_labels),
                'label_stack': self.encode_labels()}

    def __eq__(self, other):
        if isinstance(other, self.__class__):
            return self.nh == other.nh
        elif hasattr(other, 'sw_if_index'):
            # vl_api_fib_path_t
            if (len(self.nh_labels) != other.n_labels):
                return False
            for i in range(len(self.nh_labels)):
                if (self.nh_labels[i] != other.label_stack[i]):
                    return False
            return self.nh_itf == other.sw_if_index
        else:
            return False

    def __ne__(self, other):
        return not (self == other)


class VppMRoutePath(VppRoutePath):

    def __init__(self, nh_sw_if_index, flags,
                 nh=None,
                 proto=FibPathProto.FIB_PATH_NH_PROTO_IP4,
                 type=FibPathType.FIB_PATH_TYPE_NORMAL,
                 bier_imp=INVALID_INDEX):
        if not nh:
            nh = "::" if proto is FibPathProto.FIB_PATH_NH_PROTO_IP6 \
                 else "0.0.0.0"
        super(VppMRoutePath, self).__init__(nh,
                                            nh_sw_if_index,
                                            proto=proto,
                                            type=type,
                                            next_hop_id=bier_imp)
        self.nh_i_flags = flags
        self.bier_imp = bier_imp

    def encode(self):
        return {'path': super(VppMRoutePath, self).encode(),
                'itf_flags': self.nh_i_flags}


class VppIpRoute(VppObject):
    """
    IP Route
    """

    def __init__(self, test, dest_addr,
                 dest_addr_len, paths, table_id=0, register=True):
        self._test = test
        self.paths = paths
        self.table_id = table_id
        self.prefix = mk_network(dest_addr, dest_addr_len)
        self.register = register
        self.stats_index = None
        self.modified = False

        self.encoded_paths = []
        for path in self.paths:
            self.encoded_paths.append(path.encode())

    def __eq__(self, other):
        if self.table_id == other.table_id and \
           self.prefix == other.prefix:
            return True
        return False

    def modify(self, paths):
        self.paths = paths
        self.encoded_paths = []
        for path in self.paths:
            self.encoded_paths.append(path.encode())
        self.modified = True

        self._test.vapi.ip_route_add_del(route={'table_id': self.table_id,
                                                'prefix': self.prefix,
                                                'n_paths': len(
                                                    self.encoded_paths),
                                                'paths': self.encoded_paths,
                                                },
                                         is_add=1,
                                         is_multipath=0)

    def add_vpp_config(self):
        r = self._test.vapi.ip_route_add_del(
            route={'table_id': self.table_id,
                   'prefix': self.prefix,
                   'n_paths': len(self.encoded_paths),
                   'paths': self.encoded_paths,
                   },
            is_add=1,
            is_multipath=0)
        self.stats_index = r.stats_index
        if self.register:
            self._test.registry.register(self, self._test.logger)
        return self

    def remove_vpp_config(self):
        # there's no need to issue different deletes for modified routes
        # we do this only to test the two different ways to delete routes
        # eiter by passing all the paths to remove and mutlipath=1 or
        # passing no paths and multipath=0
        if self.modified:
            self._test.vapi.ip_route_add_del(
                route={'table_id': self.table_id,
                       'prefix': self.prefix,
                       'n_paths': len(
                           self.encoded_paths),
                       'paths': self.encoded_paths},
                is_add=0,
                is_multipath=1)
        else:
            self._test.vapi.ip_route_add_del(
                route={'table_id': self.table_id,
                       'prefix': self.prefix,
                       'n_paths': 0},
                is_add=0,
                is_multipath=0)

    def query_vpp_config(self):
        return find_route(self._test,
                          self.prefix.network_address,
                          self.prefix.prefixlen,
                          self.table_id)

    def object_id(self):
        return ("%s:table-%d-%s" % (
            'ip6-route' if self.prefix.version == 6 else 'ip-route',
                self.table_id,
                self.prefix))

    def get_stats_to(self):
        c = self._test.statistics.get_counter("/net/route/to")
        return c[0][self.stats_index]

    def get_stats_via(self):
        c = self._test.statistics.get_counter("/net/route/via")
        return c[0][self.stats_index]


class VppIpMRoute(VppObject):
    """
    IP Multicast Route
    """

    def __init__(self, test, src_addr, grp_addr,
                 grp_addr_len, e_flags, paths, table_id=0,
                 rpf_id=0):
        self._test = test
        self.paths = paths
        self.table_id = table_id
        self.e_flags = e_flags
        self.rpf_id = rpf_id

        self.prefix = VppIpMPrefix(src_addr, grp_addr, grp_addr_len)
        self.encoded_paths = []
        for path in self.paths:
            self.encoded_paths.append(path.encode())

    def add_vpp_config(self):
        r = self._test.vapi.ip_mroute_add_del(self.table_id,
                                              self.prefix.encode(),
                                              self.e_flags,
                                              self.rpf_id,
                                              self.encoded_paths,
                                              is_add=1)
        self.stats_index = r.stats_index
        self._test.registry.register(self, self._test.logger)
        return self

    def remove_vpp_config(self):
        self._test.vapi.ip_mroute_add_del(self.table_id,
                                          self.prefix.encode(),
                                          self.e_flags,
                                          self.rpf_id,
                                          self.encoded_paths,
                                          is_add=0)

    def update_entry_flags(self, flags):
        self.e_flags = flags
        self._test.vapi.ip_mroute_add_del(self.table_id,
                                          self.prefix.encode(),
                                          self.e_flags,
                                          self.rpf_id,
                                          [],
                                          is_add=1)

    def update_rpf_id(self, rpf_id):
        self.rpf_id = rpf_id
        self._test.vapi.ip_mroute_add_del(self.table_id,
                                          self.prefix.encode(),
                                          self.e_flags,
                                          self.rpf_id,
                                          [],
                                          is_add=1)

    def update_path_flags(self, itf, flags):
        for p in range(len(self.paths)):
            if self.paths[p].nh_itf == itf:
                self.paths[p].nh_i_flags = flags
            self.encoded_paths[p] = self.paths[p].encode()
            break

        self._test.vapi.ip_mroute_add_del(self.table_id,
                                          self.prefix.encode(),
                                          self.e_flags,
                                          self.rpf_id,
                                          [self.encoded_paths[p]],
                                          is_add=1,
                                          is_multipath=0)

    def query_vpp_config(self):
        return find_mroute(self._test,
                           self.prefix.gaddr,
                           self.prefix.saddr,
                           self.prefix.length,
                           self.table_id)

    def object_id(self):
        return ("%d:(%s,%s/%d)" % (self.table_id,
                                   self.prefix.saddr,
                                   self.prefix.gaddr,
                                   self.prefix.length))

    def get_stats(self):
        c = self._test.statistics.get_counter("/net/mroute")
        return c[0][self.stats_index]


class VppMFibSignal(object):
    def __init__(self, test, route, interface, packet):
        self.route = route
        self.interface = interface
        self.packet = packet
        self.test = test

    def compare(self, signal):
        self.test.assertEqual(self.interface, signal.sw_if_index)
        self.test.assertEqual(self.route.table_id, signal.table_id)
        self.test.assertEqual(self.route.prefix, signal.prefix)


class VppMplsIpBind(VppObject):
    """
    MPLS to IP Binding
    """

    def __init__(self, test, local_label, dest_addr, dest_addr_len,
                 table_id=0, ip_table_id=0, is_ip6=0):
        self._test = test
        self.dest_addr_len = dest_addr_len
        self.dest_addr = dest_addr
        self.ip_addr = ip_address(text_type(dest_addr))
        self.local_label = local_label
        self.table_id = table_id
        self.ip_table_id = ip_table_id
        self.prefix = mk_network(dest_addr, dest_addr_len)

    def add_vpp_config(self):
        self._test.vapi.mpls_ip_bind_unbind(self.local_label,
                                            self.prefix,
                                            table_id=self.table_id,
                                            ip_table_id=self.ip_table_id)
        self._test.registry.register(self, self._test.logger)

    def remove_vpp_config(self):
        self._test.vapi.mpls_ip_bind_unbind(self.local_label,
                                            self.prefix,
                                            table_id=self.table_id,
                                            ip_table_id=self.ip_table_id,
                                            is_bind=0)

    def query_vpp_config(self):
        dump = self._test.vapi.mpls_route_dump(self.table_id)
        for e in dump:
            if self.local_label == e.mr_route.mr_label \
               and self.table_id == e.mr_route.mr_table_id:
                return True
        return False

    def object_id(self):
        return ("%d:%s binds %d:%s/%d"
                % (self.table_id,
                   self.local_label,
                   self.ip_table_id,
                   self.dest_addr,
                   self.dest_addr_len))


class VppMplsTable(VppObject):

    def __init__(self,
                 test,
                 table_id):
        self._test = test
        self.table_id = table_id

    def add_vpp_config(self):
        self._test.vapi.mpls_table_add_del(
            self.table_id,
            is_add=1)
        self._test.registry.register(self, self._test.logger)

    def remove_vpp_config(self):
        self._test.vapi.mpls_table_add_del(
            self.table_id,
            is_add=0)

    def query_vpp_config(self):
        dump = self._test.vapi.mpls_table_dump()
        for d in dump:
            if d.mt_table.mt_table_id == self.table_id:
                return True
        return False

    def object_id(self):
        return ("table-mpls-%d" % (self.table_id))


class VppMplsRoute(VppObject):
    """
    MPLS Route/LSP
    """

    def __init__(self, test, local_label, eos_bit, paths, table_id=0,
                 is_multicast=0,
                 eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP4):
        self._test = test
        self.paths = paths
        self.local_label = local_label
        self.eos_bit = eos_bit
        self.eos_proto = eos_proto
        self.table_id = table_id
        self.is_multicast = is_multicast

    def add_vpp_config(self):
        paths = []
        for path in self.paths:
            paths.append(path.encode())

        r = self._test.vapi.mpls_route_add_del(self.table_id,
                                               self.local_label,
                                               self.eos_bit,
                                               self.eos_proto,
                                               self.is_multicast,
                                               paths, 1, 0)
        self.stats_index = r.stats_index
        self._test.registry.register(self, self._test.logger)

    def remove_vpp_config(self):
        paths = []
        for path in self.paths:
            paths.append(path.encode())

        self._test.vapi.mpls_route_add_del(self.table_id,
                                           self.local_label,
                                           self.eos_bit,
                                           self.eos_proto,
                                           self.is_multicast,
                                           paths, 0, 0)

    def query_vpp_config(self):
        return find_mpls_route(self._test, self.table_id,
                               self.local_label, self.eos_bit)

    def object_id(self):
        return ("mpls-route-%d:%s/%d"
                % (self.table_id,
                   self.local_label,
                   20 + self.eos_bit))

    def get_stats_to(self):
        c = self._test.statistics.get_counter("/net/route/to")
        return c[0][self.stats_index]

    def get_stats_via(self):
        c = self._test.statistics.get_counter("/net/route/via")
        return c[0][self.stats_index]