summaryrefslogtreecommitdiffstats
path: root/test/vpp_papi_provider.py
blob: da693c73e2ac7a3be4c0160ce8d4bac4b1c64c3e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
# 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
import queue
from six import moves, iteritems
from vpp_papi import VPPApiClient, mac_pton
from hook import Hook
from vpp_ip_route import MPLS_IETF_MAX_LABEL, MPLS_LABEL_INVALID

#
# Dictionary keyed on message name to override default values for
# named parameters
#
defaultmapping = {

    'acl_interface_add_del': {'is_add': 1, 'is_input': 1},
    'bd_ip_mac_add_del': {'is_add': 1, },
    'bfd_udp_add': {'is_authenticated': False, 'bfd_key_id': None,
                    'conf_key_id': None},
    'bfd_udp_auth_activate': {'bfd_key_id': None, 'conf_key_id': None,
                              'is_delayed': False},
    '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, },
    'bvi_delete': {},
    '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, },
    '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,
                         'classify_table_index': 4294967295, 'is_add': 1, },
    'ip_mroute_add_del': {'is_add': 1, },
    'ip_neighbor_add_del': {'is_add': 1, },
    'ip_route_add_del': {'is_add': 1, },
    'ipsec_interface_add_del_spd': {'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, },
    '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_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, },
    '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}, },
    'set_ipfix_exporter': {'collector_port': 4739, },
    'sr_policy_add': {'weight': 1, 'is_encap': 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_gpe_add_del_tunnel': {'mcast_sw_if_index': 4294967295, 'is_add': 1,
                                 'protocol': 3, },
    'want_bfd_events': {'enable_disable': 1, },
    'want_igmp_events': {'enable': 1, },
    'want_interface_events': {'enable_disable': 1, },
    'want_l2_macs_events': {'enable_disable': 1, 'pid': os.getpid(), },
    'want_l2_macs_events2': {'enable_disable': 1, 'pid': os.getpid(), },
}


def as_fn_signature(d):
    return ", ".join(f"{k}={v}" for k, v in d.items())


class CliFailedCommandError(Exception):
    """ cli command failed."""


class CliSyntaxError(Exception):
    """ cli command had a syntax error."""


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

        # install_dir is a class attribute. We need to set it before
        # calling the constructor.
        VPPApiClient.apidir = os.getenv('VPP_INSTALL_PATH')

        self.vpp = VPPApiClient(logger=test_class.logger,
                                read_timeout=read_timeout,
                                use_socket=True,
                                server_address=test_class.api_sock)
        self._events = queue.Queue()

    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. """
        result = []
        while True:
            try:
                e = self._events.get(block=False)
                result.append(e)
            except queue.Empty:
                return result
        return result

    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)
        try:
            e = self._events.get(timeout=timeout)
        except queue.Empty:
            raise Exception("Event did not occur within timeout")
        msgname = type(e).__name__
        if name and msgname != name:
            raise Exception("Unexpected event received: %s, expected: %s"
                            % msgname)
        self.test_class.logger.debug("Returning event %s:%s" % (name, e))
        return e

    def __call__(self, name, event):
        """ Enqueue event in the internal event queue. """
        self.test_class.logger.debug("New event: %s: %s" % (name, event))
        self._events.put(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 BaseException:
                    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"""
        # This might be called before VPP is prepared to listen to the socket
        retries = 0
        while not os.path.exists(self.test_class.api_sock):
            time.sleep(0.5)
            retries += 1
            if retries > 120:
                break
        self.vpp.connect(self.name[:63])
        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 = "%s(%s) passed unexpectedly: expected negative " \
                      "return value instead of %d in %s" % \
                      (api_fn.__name__, as_fn_signature(api_args),
                       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 = "%s(%s) failed, expected %d return value instead " \
                      "of %d in %s" % (api_fn.__name__,
                                       as_fn_signature(api_args),
                                       expected_retval, reply.retval,
                                       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_return_response(self, cli):
        """ Execute a CLI, calling the before/after hooks appropriately.
        Return the reply without examining it

        :param cli: CLI to execute
        :returns: response object

        """
        self.hook.before_cli(cli)
        cli += '\n'
        r = self.papi.cli_inband(cmd=cli)
        self.hook.after_cli(cli)
        return r

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

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

        """
        r = self.cli_return_response(cli)
        if r.retval == -156:
            raise CliSyntaxError(r.reply)
        if r.retval != 0:
            raise CliFailedCommandError(r.reply)
        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" + self.cli(cli)

    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 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_route_dump(self, table_id, is_ip6=False):
        return self.api(self.papi.ip_route_dump,
                        {'table': {
                            'table_id': table_id,
                            'is_ip6': is_ip6
                        }})

    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 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 udp_encap_del(self, id):
        return self.api(self.papi.udp_encap_del, {'id': id})

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

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

    def mpls_route_dump(self, table_id):
        return self.api(self.papi.mpls_route_dump,
                        {'table': {
                            'mt_table_id': table_id
                        }})

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

    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':
             {
                 'mt_table_id': table_id,
             },
             'mt_is_add': is_add})

    def mpls_route_add_del(self,
                           table_id,
                           label,
                           eos,
                           eos_proto,
                           is_multicast,
                           paths,
                           is_add,
                           is_multipath):
        """ MPLS Route add/del """
        return self.api(
            self.papi.mpls_route_add_del,
            {'mr_route':
             {
                 'mr_table_id': table_id,
                 'mr_label': label,
                 'mr_eos': eos,
                 'mr_eos_proto': eos_proto,
                 'mr_is_multicast': is_multicast,
                 'mr_n_paths': len(paths),
                 'mr_paths': paths,
             },
             'mr_is_add': is_add,
             'mr_is_multipath': is_multipath})

    def mpls_ip_bind_unbind(
            self,
            label,
            prefix,
            table_id=0,
            ip_table_id=0,
            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_prefix': prefix})

    def mpls_tunnel_add_del(
            self,
            tun_sw_if_index,
            paths,
            is_add=1,
            l2_only=0,
            is_multicast=0):
        """
        """
        return self.api(
            self.papi.mpls_tunnel_add_del,
            {'mt_is_add': is_add,
             'mt_tunnel':
             {
                 'mt_sw_if_index': tun_sw_if_index,
                 'mt_l2_only': l2_only,
                 'mt_is_multicast': is_multicast,
                 'mt_n_paths': len(paths),
                 'mt_paths': paths,
             }})

    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 mfib_signal_dump(self):
        return self.api(self.papi.mfib_signal_dump, {})

    def ip_mroute_dump(self, table_id, is_ip6=False):
        return self.api(self.papi.ip_mroute_dump,
                        {'table': {
                            'table_id': table_id,
                            'is_ip6': is_ip6
                        }})

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

    def pppoe_add_del_session(
            self,
            client_ip,
            client_mac,
            session_id=0,
            is_add=1,
            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,
                         '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,
                         'is_spray': 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 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_route': {
                    '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': [{'table_id': next_hop_tbl_id,
                            '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 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_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,
                    }
            })

    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, salt=0,
                                anti_replay=1, renumber=0,
                                udp_encap=0, show_instance=0xffffffff):
        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,
                'udp_encap': udp_encap,
                'salt': salt
            })

    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 punt_socket_register(self, reg, pathname,
                             header_version=1):
        """ Register punt socket """
        return self.api(self.papi.punt_socket_register,
                        {'header_version': header_version,
                         'punt': reg,
                         'pathname': pathname})

    def punt_socket_deregister(self, reg):
        """ Unregister punt socket """
        return self.api(self.papi.punt_socket_deregister,
                        {'punt': reg})

    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, {})

    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, rd_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,
                                'rd_id': rd_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,
                             scope,
                             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':
                            {
                                'scope': scope,
                                '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, flags):
        """ 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,
                             'flags': flags}})

    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, {})

    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 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()})