summaryrefslogtreecommitdiffstats
path: root/hicn-plugin/src/punt.c
blob: ea553bf766d64e23db5f98ccb19b916cdc106e4f (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
/*
 * Copyright (c) 2017-2019 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.
 */

#include <stdarg.h>
#include <stddef.h>		// offsetof()
#include <inttypes.h>
#include <vlib/vlib.h>
#include <vppinfra/error.h>
#include <vnet/ip/format.h>
#include <vnet/classify/in_out_acl.h>
#include <vlibapi/api.h>
#include <vlibmemory/api.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/ethernet/packet.h>
#include <vlib/global_funcs.h>
#include <hicn/hicn.h>

#include "hicn.h"
#include "infra.h"
#include "parser.h"
#include "mgmt.h"
#include "punt.h"
#include "error.h"
#include "route.h"

/* Those are not static as they are used for pgen in hicn_cli.c */
ip_version_t ipv4 = {
  .tbl = (u32 *) hicn_punt_glb.ip4_vnet_tbl_idx,
  .addr_len_bits = IPV4_ADDR_LEN_BITS,
  .protocol_field = &ipv4_protocol,
  .version_field = &ipv4_version,
  .ip_version = 0x40,
};

ip_version_t ipv6 = {
  .tbl = (u32 *) hicn_punt_glb.ip6_vnet_tbl_idx,
  .addr_len_bits = IPV6_ADDR_LEN_BITS,
  .protocol_field = &ipv6_protocol,
  .version_field = &ipv6_version,
  .ip_version = 0x60,
};

ip_version_t ipv44 = {
  .tbl = (u32 *) hicn_punt_glb.udp44_vnet_tbl_idx,
  .addr_len_bits = IPV4_ADDR_LEN_BITS,
  .protocol_field = &udp4_protocol,
  .udp_sport = &udp4_sport,
  .udp_dport = &udp4_dport,
  .ip_version = 0x40,
};

ip_version_t ipv64 = {
  .tbl = (u32 *) hicn_punt_glb.udp64_vnet_tbl_idx,
  .addr_len_bits = IPV4_ADDR_LEN_BITS,
  .protocol_field = &udp6_protocol,
  .udp_sport = &udp6_sport,
  .udp_dport = &udp6_dport,
  .ip_version = 0x60,
};

ip_version_t ipv46 = {
  .tbl = (u32 *) hicn_punt_glb.udp46_vnet_tbl_idx,
  .addr_len_bits = IPV6_ADDR_LEN_BITS,
  .protocol_field = &udp4_protocol,
  .udp_sport = &udp4_sport,
  .udp_dport = &udp4_dport,
  .ip_version = 0x40,
};

ip_version_t ipv66 = {
  .tbl = (u32 *) hicn_punt_glb.udp66_vnet_tbl_idx,
  .addr_len_bits = IPV6_ADDR_LEN_BITS,
  .protocol_field = &udp6_protocol,
  .udp_sport = &udp6_sport,
  .udp_dport = &udp6_dport,
  .ip_version = 0x60,
};

#define _(NAME, BASE, LAYER, FIELD, PUNT_ID)          \
    field_t NAME = {                     \
        .offset = BASE + offsetof(LAYER, FIELD),       \
        .len = STRUCT_SIZE_OF(LAYER, FIELD),       \
        .punt_id = PUNT_ID,                     \
    };
foreach_field
#undef _
/*
 * In the latest version, we let faces direct the traffic towards Interest
 * processing, or MAP-Me nodes. Punting should only make sure that the ICMP
 * packets are also sent to the face node. We added the following defines to
 * determine the next node to send punted packets. Ideally we might remove
 * protocol number check from punting rule.
 */
#define NEXT_MAPME_CTRL4 hicn_punt_glb.next_hit_interest_ipv4
#define NEXT_MAPME_ACK4 hicn_punt_glb.next_hit_data_ipv4
#define NEXT_MAPME_CTRL6 hicn_punt_glb.next_hit_interest_ipv6
#define NEXT_MAPME_ACK6 hicn_punt_glb.next_hit_data_ipv6

/* Maximum number of vector allowed in match. Value hardcoded in vnet_classify_hash_packet_inline in vnet_classify.h */
#define MAX_MATCH_SIZE 5
/**
 * HICN global Punt Info
 *
 *
 *
 */
hicn_punt_glb_t hicn_punt_glb;

/**
 * We use the function build_bit_array to populate an initially empty buffer
 * with masks/values for the parts of the packet to match. The function also
 * returns the correct skip and match values to pass to vnet_classify_*, which
 * are the number of vectors to skip/match during classification (they should be
 * multiples of vector size = CLASSIFIER_VECTOR_SIZE).
 *
 * offsets:
 * 0         14     offsetof(IP_HDR, SRC)
 * |          |    /
 * +----------+----+-------+-------+----+-...
 * |   ETH    | IP .  src  .  dst  .    |
 * +----------+----+-------+-------+----+-...
 * |            |                   |
 * |<- skip=1 ->|<--- match=2/3 --->|
 *
 *
 */

/**
 * The following section defines a couple of protocol fields that we will use
 * for creating the buffer. We retrieve the offset and length on those fields
 * based on the (portable) header struct aliases defined in libhicn.
 *
 * In the foreach_field macro, the punt_id field is used as convenience as we
 * will have to create different classifier tables based on whether we punt
 * interests (on dst) or data (on src). It is undefined (NA) otherwise.
 */

#define NA 0


/**
 * @brief Create a bitmask from mask length.
 * @param mask [in] mask length (in bits)
 * @param buffer [out] output buffer
 * @param len [out] output buffer length
 */
static void
build_ip_address_mask (u8 mask, u8 * buffer, u32 len)
{
  u32 hi_bytes = mask / 8;
  u32 hi_bits = mask % 8;
  u8 byte_mask = 0xff;

  /*
   * memset buffer with 0xff in case of IPV6 16 bytes will be used for
   * match
   */
  memset (buffer, 0, len);
  //might not be needed if buffer is already 0 'ed XXX
  memset (buffer, 0xff, hi_bytes);
  if (hi_bits != 0)
    {
      for (int i = 0; i < (8 - hi_bits); i++)
	byte_mask = byte_mask << 1;
      buffer[hi_bytes] = byte_mask;
    }
}

#define CEIL_DIV(x, y) (1 + ((x - 1) / y))

/**
 * @brief Create a bit array from field/value list
 * @param buffer [out] output buffer
 * @param len [out] output buffer length
 * @param skip [out] number of CLASSIFIER_VECTOR to skip
 * @param match [out] number of CLASSIFIER_VECTOR to match
 * @param ... [in] list of [field_t *, value] * used to populate buffer
 */
static int
build_bit_array (u8 * buffer, u32 len, u32 base_offset, u32 * skip,
		 u32 * match, va_list vl)
{
  u8 min = len, max = 0;
  field_t *field;
  u8 *value;
  int pos;
  int count = 0;

  /* Clear buffer */
  memset (buffer, 0, len);

  for (;;)
    {
      count++;
      field = va_arg (vl, field_t *);
      if (!field)
	break;

      /* Check that the field belongs to the reserved buffer */
      if (field->offset + field->len > len)
	goto ERR_PUNT;

      /*
       * Copy the value of the field inside the buffer at the
       * correct offset
       */
      pos = base_offset + field->offset;
      value = va_arg (vl, u8 *);
      memcpy (buffer + pos, value, field->len);
      if (min > pos)
	min = pos;
      if (max < pos + field->len)
	max = pos + field->len;
    }

  /* We can skip multiples of the vector match */
  *skip = min / CLASSIFIER_VECTOR_SIZE;
  *match = CEIL_DIV (max, CLASSIFIER_VECTOR_SIZE) - *skip;

  if (*match > MAX_MATCH_SIZE)
    *match = MAX_MATCH_SIZE;

  return HICN_ERROR_NONE;

ERR_PUNT:
  *skip = 0;
  *match = 0;
  return HICN_ERROR_PUNT_INVAL;
}

void
update_table4_index (u32 intfc, u32 table_index)
{
  vnet_classify_main_t *cm = &vnet_classify_main;

  if (hicn_punt_glb.head_ip4[intfc] == ~0)
    hicn_punt_glb.head_ip4[intfc] = table_index;

  /* Update the table in tail to poin to this */
  if (hicn_punt_glb.tail_ip4[intfc] != ~0)
    {
      vnet_classify_table_t *t =
	pool_elt_at_index (cm->tables, hicn_punt_glb.tail_ip4[intfc]);
      t->next_table_index = table_index;
    }
  hicn_punt_glb.tail_ip4[intfc] = table_index;
}

void
update_table6_index (u32 intfc, u32 table_index)
{
  vnet_classify_main_t *cm = &vnet_classify_main;

  if (hicn_punt_glb.head_ip6[intfc] == ~0)
    hicn_punt_glb.head_ip6[intfc] = table_index;

  /* Update the table in tail to poin to this */
  if (hicn_punt_glb.tail_ip6[intfc] != ~0)
    {
      vnet_classify_table_t *t =
	pool_elt_at_index (cm->tables, hicn_punt_glb.tail_ip6[intfc]);
      t->next_table_index = table_index;
    }
  hicn_punt_glb.tail_ip6[intfc] = table_index;
}

/**
 * @brief Add or remove a vnet table matching the list of fields/values passed
 * as parameters.
 *
 * @param punt_id Storage identifier (HICN_PUNT_SRC | HICN_PUNT_DST)
 * @param mask Subnet mask to match in the table
 * @param next_tbl_index next table to match in case of miss
 * @param intfc Interface identifier
 * @param is_add 1 if the table must be created, 0 if removed
 * @param ... list of (field_t, value) to be matched
 *
 * @result Returns:
 *    HICN_ERROR_TBL_EXIST if is_add == 1 and a table for the same mask
 *      already exists,
 *    HICN_ERROR_TBL_NOT_FOUND if is_add == 0 and there is no table for the
 *      given mask,
 *    HICN_ERROR_NONE if no * error occurred.
 */
int
_hicn_punt_add_del_vnettbl (ip_version_t * ip, u8 punt_id, u8 mask,
			    u32 next_tbl_index, u32 intfc, int base_offset,
			    int is_add, u8 use_current_data, ...)
{
  u8 buffer[PUNT_BUFFER_SIZE];	/* must be dimensioned
				 * large enough */
  int rt;
  va_list vl;
  u32 *table_index;
  u32 new_table_index;
  u32 skip, match;


  /* Build the buffer right from the start to determine the skip size */
  va_start (vl, use_current_data);
  build_bit_array (buffer, sizeof (buffer), base_offset, &skip, &match, vl);
  va_end (vl);

  ASSERT (skip < 4);
  //Hardcoded limit in following array

  table_index = TABLE_ELT_P (ip, intfc, skip, punt_id, mask);

  if (is_add && *table_index != HICNP_PUNY_INVALID_TBL)
    return HICN_ERROR_PUNT_TBL_EXIST;
  if (!is_add && *table_index == HICNP_PUNY_INVALID_TBL)
    return HICN_ERROR_PUNT_TBL_NOT_FOUND;

  new_table_index = ~0;
  rt = vnet_classify_add_del_table (&vnet_classify_main,
				    buffer + skip * CLASSIFIER_VECTOR_SIZE,
				    HICN_CLASSIFY_NBUCKETS,
				    HICN_CLASSIFY_TABLE_MEMORY_SIZE, skip,
				    match, HICN_CLASSIFY_NO_NEXT_TABLE,
				    HICN_CLASSIFY_MISS_NEXT_INDEX,
				    &new_table_index,
				    use_current_data,
				    HICN_CLASSIFY_CURRENT_DATA_OFFSET, is_add,
				    HICN_CLASSIFY_DON_T_DEL_CHAIN);

  if (rt != 0)
    return HICN_ERROR_PUNT_INVAL;

  *table_index = new_table_index;
  if (ip->ip_version == 0x40)
    update_table4_index (intfc, new_table_index);
  else
    update_table6_index (intfc, new_table_index);
  return HICN_ERROR_NONE;
}

/**
 * @brief Add or remove a vnet table matching the ip_version and field (src/dst)
 */
int
hicn_punt_add_del_vnettbl (ip_version_t * ip, field_t * field, u8 mask,
			   u32 next_tbl_index, u32 intfc, u8 base_offset,
			   u8 use_current_data, int is_add)
{
  u8 ip_mask[IPV6_ADDR_LEN];
  build_ip_address_mask (mask, ip_mask, sizeof (ip_mask));

  return _hicn_punt_add_del_vnettbl (ip, field->punt_id, mask, next_tbl_index,
				     intfc, base_offset, is_add,
				     use_current_data, field, ip_mask, NULL);
}


/**
 * @brief Add or remove a vnet table for udp tunnels matching the ip_version and field (src/dst)
 *
 */
int
hicn_punt_add_del_vnettbl_udp (ip_version_t * outer, ip_version_t * inner,
			       field_t * field, u8 mask, u32 next_tbl_index,
			       u32 intfc, u8 base_offset, int is_add)
{
  u8 udp_mask[inner->addr_len_bits];
  build_ip_address_mask (mask, udp_mask, sizeof (udp_mask));
  u16 port_value = 0xffff;
  u8 protocol_value = 0xff;
  
  return _hicn_punt_add_del_vnettbl (outer, field->punt_id, mask,
				     next_tbl_index, intfc, base_offset,
				     is_add,
				     HICN_CLASSIFY_NO_CURRENT_DATA_FLAG,
				     outer->protocol_field, &protocol_value,
				     outer->udp_sport, &port_value,
				     outer->udp_dport, &port_value, field,
				     udp_mask, NULL);
}

#define hicn_punt_add_vnettbl_udp(outer, inner, field, mask, next_tbl_index, intfc, base_offset) \
  (hicn_punt_add_del_vnettbl_udp(outer, inner, field, mask, next_tbl_index, intfc, base_offset, OP_ADD))

#define hicn_punt_del_vnettbl_udp(outer, inner, field, mask, next_tbl_index, intfc, base_offset) \
  (hicn_punt_add_del_vnettbl_udp(outer, inner, field, mask, next_tbl_index, intfc, base_offset, OP_DEL))

/**
 * @brief Add or remove a vnet session matching the list of fields/values passed
 * as parameters.
 *
 * @param punt_id Storage identifier (HICN_PUNT_SRC | HICN_PUNT_DST)
 * @param v4_address IPv4 address to match in the session // XXX v4/v6
 * @param mask Subnet mask to match in the session
 * @param next_hit_index vlib arch id pointing to the next node
 * @param intfc Interface identifier
 * @param is_add 1 if the session must be create, 0 if removed
 * @param ... list of (field_t, value) to be matched
 *
 * @result Returns:
 *   HICN_ERROR_TBL_NOT_FOUND there is no table for the given mask,
 *   HICN_ERROR_PUNT_SSN_NOT_FOUND if is_add == 0 and there is no session for
 *     the given address,
 *   HICN_ERROR_NONE if no error * occurred.
 */
int
_hicn_punt_add_del_vnetssn (ip_version_t * ip, u8 punt_id, u8 mask,
			    u32 next_hit_index, u32 intfc, int base_offset,
			    int is_add, ...)
{
  u8 buffer[PUNT_BUFFER_SIZE];	/* must be dimensioned
				 * large enough */
  int rt;
  va_list vl;
  u32 table_index;
  u32 skip, match;

  /* Build the buffer right from the start to determine the skip size */
  va_start (vl, is_add);
  build_bit_array (buffer, sizeof (buffer), base_offset, &skip, &match, vl);
  va_end (vl);

  ASSERT (skip < 4);
  //Hardcoded limit in following array

  table_index = TABLE_ELT (ip, intfc, skip, punt_id, mask);

  if (table_index == HICNP_PUNY_INVALID_TBL)
    return HICN_ERROR_PUNT_TBL_NOT_FOUND;

  rt = vnet_classify_add_del_session (&vnet_classify_main, table_index, buffer,	//+skip * CLASSIFIER_VECTOR_SIZE,
				      next_hit_index,
				      HICN_CLASSIFY_OPAQUE_INDEX,
				      HICN_CLASSIFY_ADVANCE,
				      HICN_CLASSIFY_ACTION,
				      HICN_CLASSIFY_METADATA, is_add);

  if (rt == VNET_API_ERROR_NO_SUCH_ENTRY)
    rt = HICN_ERROR_PUNT_SSN_NOT_FOUND;

  return rt;
}

/**
 * @brief Add or remove a vnet session matching the ip6 src address
 *
 * See hicn_punt_add_del_vnetssn for details about parameters.
 */
int
hicn_punt_add_del_vnetssn (ip_version_t * ip, field_t * field,
			   ip46_address_t * v46_address, u8 mask,
			   u32 next_hit_index, u32 intfc, u8 base_offset,
			   int is_add)
{
  return _hicn_punt_add_del_vnetssn (ip, field->punt_id, mask, next_hit_index,
				     intfc, base_offset, is_add, field,
				     ip46_address_is_ip4 (v46_address) ?
				     v46_address->ip4.as_u8 : v46_address->
				     ip6.as_u8, NULL);
}



/**
 * @brief Add or remove a vnet session for udp tunnels matching the ip6 src address
 *
 * See hicn_punt_add_del_vnetssn for details about parameters.
 */
int
hicn_punt_add_del_vnetssn_udp (ip_version_t * outer, ip_version_t * inner,
			       field_t * field, ip46_address_t * v46_address,
			       u8 mask, u32 next_hit_index, u32 intfc,
			       u8 base_offset, u8 protocol, u16 sport,
			       u16 dport, int is_add)
{    
  return _hicn_punt_add_del_vnetssn (outer, field->punt_id, mask,
				     next_hit_index, intfc, base_offset,
				     is_add, outer->protocol_field, &protocol,
				     outer->udp_sport, &sport,
				     outer->udp_dport, &dport, field,
				     v46_address->as_u8, NULL);
}

#define hicn_punt_add_vnetssn_udp(outer, inner, field, addr, mask, index, intfc, offset, protocol, sport, dport) \
  (hicn_punt_add_del_vnetssn_udp(outer, inner, field, addr, mask, index, intfc, offset, protocol, sport, dport, OP_ADD))

#define hicn_punt_del_vnetssn_udp(outer, inner, field, addr, mask, index, intfc, offset, protocol, sport, dport) \
  (hicn_punt_add_del_vnetssn_udp(outer, inner, field, addr, mask, index, intfc, offset, protocol, sport, dport, OP_DEL))

/*
 * Enable the table on a given interface considering the table type
 */
void
hicn_punt_enable_disable_vnet_ip4_table_on_intf (vlib_main_t * vm,
						 u32 sw_if_index,
						 int is_enable)
{
  if (hicn_punt_glb.head_ip4[sw_if_index] != HICNP_PUNY_INVALID_TBL)
    (void) vnet_set_input_acl_intfc (vm, sw_if_index,
				     hicn_punt_glb.head_ip4[sw_if_index],
				     0xFFFFFFFF, 0xFFFFFFFF, is_enable);
  return;
}

/*
 * Enable the table on a given interface considering the table type
 *
 * XXX replace skip by base_offset XXX are we sure we always have ETH_L2, and
 * not base_offset ???
 */
int
hicn_punt_remove_ip4_address (vlib_main_t * vm, ip4_address_t * addr,
			      u8 mask, int skip, u32 sw_if_index,
			      int is_enable)
{

  vnet_classify_main_t *cm = &vnet_classify_main;
  vnet_classify_table_t *vnet_table = NULL;

  u32 table_index = ~0;

  u32 base_offset = (skip ? ETH_L2 : NO_L2);
  ip46_address_t addr46;
  ip46_address_set_ip4 (&addr46, addr);

  hicn_punt_del_vnetssn (&ipv4, &ipv4_src, &addr46, mask,
			 hicn_punt_glb.next_hit_data_ipv4, sw_if_index,
			 ETH_L2);
  hicn_punt_del_vnetssn (&ipv4, &ipv4_dst, &addr46, mask,
			 hicn_punt_glb.next_hit_interest_ipv4, sw_if_index,
			 ETH_L2);

  table_index =
    hicn_punt_glb.ip4_vnet_tbl_idx[sw_if_index][skip][HICN_PUNT_DST][mask];
  vnet_table = pool_elt_at_index (cm->tables, table_index);
  if (vnet_table->active_elements == 0)
    {
      hicn_punt_del_vnettbl (&ipv4, &ipv4_dst, mask,
			     hicn_punt_glb.ip4_vnet_tbl_idx[sw_if_index][skip]
			     [HICN_PUNT_SRC][mask], sw_if_index, base_offset);
    }
  table_index =
    hicn_punt_glb.ip4_vnet_tbl_idx[sw_if_index][skip][HICN_PUNT_SRC][mask];
  vnet_table = pool_elt_at_index (cm->tables, table_index);
  if (vnet_table->active_elements == 0)
    {
      hicn_punt_del_vnettbl (&ipv4, &ipv4_src, mask, ~0, sw_if_index,
			     base_offset);
    }
  return HICN_ERROR_NONE;
}

int
hicn_punt_remove_ip6_address (vlib_main_t * vm, ip6_address_t * addr,
			      u8 mask, int skip, u32 sw_if_index,
			      int is_enable)
{

  vnet_classify_main_t *cm = &vnet_classify_main;
  vnet_classify_table_t *vnet_table = NULL;

  u32 table_index = ~0;

  u32 base_offset = (skip ? ETH_L2 : NO_L2);

  hicn_punt_del_vnetssn (&ipv6, &ipv6_src, (ip46_address_t *) addr, mask,
			 hicn_punt_glb.next_hit_data_ipv6, sw_if_index,
			 ETH_L2);
  hicn_punt_del_vnetssn (&ipv6, &ipv6_dst, (ip46_address_t *) addr, mask,
			 hicn_punt_glb.next_hit_interest_ipv6, sw_if_index,
			 ETH_L2);

  table_index =
    hicn_punt_glb.ip6_vnet_tbl_idx[sw_if_index][skip][HICN_PUNT_DST][mask];
  vnet_table = pool_elt_at_index (cm->tables, table_index);
  if (vnet_table->active_elements == 0)
    {
      hicn_punt_del_vnettbl (&ipv6, &ipv6_dst, mask,
			     hicn_punt_glb.ip6_vnet_tbl_idx[sw_if_index][skip]
			     [HICN_PUNT_SRC][mask], sw_if_index, base_offset);
    }
  table_index =
    hicn_punt_glb.ip6_vnet_tbl_idx[sw_if_index][skip][HICN_PUNT_SRC][mask];
  vnet_table = pool_elt_at_index (cm->tables, table_index);
  if (vnet_table->active_elements == 0)
    {
      hicn_punt_del_vnettbl (&ipv6, &ipv6_src, mask, ~0, sw_if_index,
			     base_offset);
    }
  return HICN_ERROR_NONE;
}

/*
 * Enable the table on a given interface considering the table type
 */
void
hicn_punt_enable_disable_vnet_ip6_table_on_intf (vlib_main_t * vm,
						 u32 sw_if_index,
						 int is_enable)
{
  if (hicn_punt_glb.head_ip6[sw_if_index] != HICNP_PUNY_INVALID_TBL)
    (void) vnet_set_input_acl_intfc (vm, sw_if_index,
				     0xFFFFFFFF,
				     hicn_punt_glb.head_ip6[sw_if_index],
				     0xFFFFFFFF, is_enable);
  return;
}

/*
 * HICN PUNT vlibd node addtion
 */
void
hicn_punt_vlib_node_add (vlib_main_t * vm)
{
  u32 hit_next_index = 0xFFFFFFFF;
  vlib_node_t *node;

  /* to remove the warning */
  hit_next_index = hit_next_index;

  //Accquire the node indexes

  /* ip face */
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-ip4-input");
  hicn_punt_glb.hicn_node_info.hicn_face_ip4_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-ip6-input");
  hicn_punt_glb.hicn_node_info.hicn_face_ip6_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-ip4-output");
  hicn_punt_glb.hicn_node_info.hicn_face_ip4_output_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-ip6-output");
  hicn_punt_glb.hicn_node_info.hicn_face_ip6_output_index = node->index;

  /* ip iface */
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-ip4-input");
  hicn_punt_glb.hicn_node_info.hicn_iface_ip4_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-ip6-input");
  hicn_punt_glb.hicn_node_info.hicn_iface_ip6_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-ip4-output");
  hicn_punt_glb.hicn_node_info.hicn_iface_ip4_output_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-ip6-output");
  hicn_punt_glb.hicn_node_info.hicn_iface_ip4_output_index = node->index;

  /* udp face */
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-udp4-input");
  hicn_punt_glb.hicn_node_info.hicn_face_udp4_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-udp6-input");
  hicn_punt_glb.hicn_node_info.hicn_face_udp6_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-udp4-output");
  hicn_punt_glb.hicn_node_info.hicn_face_udp4_output_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-face-udp6-output");
  hicn_punt_glb.hicn_node_info.hicn_face_udp6_output_index = node->index;

  /* udp iface */
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-udp4-input");
  hicn_punt_glb.hicn_node_info.hicn_iface_udp4_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-udp6-input");
  hicn_punt_glb.hicn_node_info.hicn_iface_udp6_input_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-udp4-output");
  hicn_punt_glb.hicn_node_info.hicn_iface_udp4_output_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "hicn-iface-udp6-output");
  hicn_punt_glb.hicn_node_info.hicn_iface_udp6_output_index = node->index;

  node = vlib_get_node_by_name (vm, (u8 *) "ip4-inacl");
  hicn_punt_glb.hicn_node_info.ip4_inacl_node_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "ip6-inacl");
  hicn_punt_glb.hicn_node_info.ip6_inacl_node_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
  hicn_punt_glb.hicn_node_info.ip4_lookup_node_index = node->index;
  node = vlib_get_node_by_name (vm, (u8 *) "ip6-lookup");
  hicn_punt_glb.hicn_node_info.ip6_lookup_node_index = node->index;


  hicn_punt_glb.next_hit_data_ipv4 = vlib_node_add_next (vm,
							 hicn_punt_glb.hicn_node_info.
							 ip4_inacl_node_index,
							 hicn_punt_glb.hicn_node_info.
							 hicn_face_ip4_input_index);

  hicn_punt_glb.next_hit_interest_ipv4 = vlib_node_add_next (vm,
							     hicn_punt_glb.hicn_node_info.
							     ip4_inacl_node_index,
							     hicn_punt_glb.hicn_node_info.
							     hicn_iface_ip4_input_index);

  hicn_punt_glb.next_hit_data_ipv6 = vlib_node_add_next (vm,
							 hicn_punt_glb.hicn_node_info.
							 ip6_inacl_node_index,
							 hicn_punt_glb.hicn_node_info.
							 hicn_face_ip6_input_index);

  hicn_punt_glb.next_hit_interest_ipv6 = vlib_node_add_next (vm,
							     hicn_punt_glb.hicn_node_info.
							     ip6_inacl_node_index,
							     hicn_punt_glb.hicn_node_info.
							     hicn_iface_ip6_input_index);

  hicn_punt_glb.next_hit_data_udp4 = vlib_node_add_next (vm,
							 hicn_punt_glb.hicn_node_info.
							 ip4_inacl_node_index,
							 hicn_punt_glb.hicn_node_info.
							 hicn_face_udp4_input_index);

  hicn_punt_glb.next_hit_interest_udp4 = vlib_node_add_next (vm,
							     hicn_punt_glb.hicn_node_info.
							     ip4_inacl_node_index,
							     hicn_punt_glb.hicn_node_info.
							     hicn_iface_udp4_input_index);

  hicn_punt_glb.next_hit_data_udp6 = vlib_node_add_next (vm,
							 hicn_punt_glb.hicn_node_info.
							 ip6_inacl_node_index,
							 hicn_punt_glb.hicn_node_info.
							 hicn_face_udp6_input_index);

  hicn_punt_glb.next_hit_interest_udp6 = vlib_node_add_next (vm,
							     hicn_punt_glb.hicn_node_info.
							     ip6_inacl_node_index,
							     hicn_punt_glb.hicn_node_info.
							     hicn_iface_udp6_input_index);

  return;
}

/*
 * HICN PUNT INIT
 */
void
hicn_punt_init (vlib_main_t * vm)
{
  u32 table_index = ~0;
  //Create vnet classify tables and store the table indexes
  memset (hicn_punt_glb.ip4_vnet_tbl_idx, table_index,
	  sizeof (u32) * 4 * 2 * HICN_PUNT_IP4_MASK * HICN_MAX_INTFC);
  memset (hicn_punt_glb.ip6_vnet_tbl_idx, table_index,
	  sizeof (u32) * 4 * 2 * HICN_PUNT_IP6_MASK * HICN_MAX_INTFC);

  memset (hicn_punt_glb.udp44_vnet_tbl_idx, table_index,
	  sizeof (u32) * 4 * 2 * HICN_PUNT_IP4_MASK * HICN_MAX_INTFC);
  memset (hicn_punt_glb.udp46_vnet_tbl_idx, table_index,
	  sizeof (u32) * 4 * 2 * HICN_PUNT_IP6_MASK * HICN_MAX_INTFC);
  memset (hicn_punt_glb.udp64_vnet_tbl_idx, table_index,
	  sizeof (u32) * 4 * 2 * HICN_PUNT_IP4_MASK * HICN_MAX_INTFC);
  memset (hicn_punt_glb.udp66_vnet_tbl_idx, table_index,
	  sizeof (u32) * 4 * 2 * HICN_PUNT_IP6_MASK * HICN_MAX_INTFC);
  //Register hicn nodes after vnet table creation
  hicn_punt_vlib_node_add (vm);
  memset (hicn_punt_glb.head_ip4, ~0, sizeof (u32) * HICN_MAX_INTFC);
  memset (hicn_punt_glb.tail_ip4, ~0, sizeof (u32) * HICN_MAX_INTFC);
  memset (hicn_punt_glb.head_ip6, ~0, sizeof (u32) * HICN_MAX_INTFC);
  memset (hicn_punt_glb.tail_ip6, ~0, sizeof (u32) * HICN_MAX_INTFC);
  return;
}

u32
hicn_punt_interest_data_for_udp (vlib_main_t * vm,
				 ip46_address_t * prefix, u8 mask,
				 u32 swif, u8 punt_type, u16 sport, u16 dport)
{
  int skip = 1;
  u32 table_index;

  if (punt_type != HICN_PUNT_IP_TYPE && punt_type != HICN_PUNT_UDP4_TYPE
      && punt_type != HICN_PUNT_UDP6_TYPE)
    return HICN_ERROR_PUNT_INVAL;

  if (ip46_address_is_ip4 (prefix))
    {
      if (mask > IPV4_ADDR_LEN_BITS)
	return HICN_ERROR_PUNT_INVAL;

      if (punt_type == HICN_PUNT_UDP4_TYPE)
	{
	  skip = 2;
	  /* Create Vnet table for a given mask */
	  hicn_punt_add_vnettbl_udp (&ipv44, &ipv4, &udp44_src, mask, ~0,
				     swif, ETH_L2);

	  table_index =
	    hicn_punt_glb.udp44_vnet_tbl_idx[swif][skip][HICN_PUNT_SRC][mask];

	  hicn_punt_add_vnettbl_udp (&ipv44, &ipv4, &udp44_dst, mask,
				     table_index, swif, ETH_L2);
	  /*
	   * Add a session for the specified ip address and
	   * subnet mask
	   */
	  hicn_punt_add_vnetssn_udp (&ipv44, &ipv4, &udp44_src,
				     prefix, mask,
				     hicn_punt_glb.next_hit_data_udp4,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);

	  hicn_punt_add_vnetssn_udp (&ipv44, &ipv4, &udp44_dst,
				     prefix, mask,
				     hicn_punt_glb.next_hit_interest_udp4,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);

	  hicn_punt_enable_disable_vnet_ip4_table_on_intf (vm, swif,
							   OP_ENABLE);
	}
      else			//PUNTING is UDP6
	{
	  skip = 3;
	  /* Create Vnet table for a given mask */
	  hicn_punt_add_vnettbl_udp (&ipv64, &ipv6, &udp64_src, mask, ~0,
				     swif, ETH_L2);

	  table_index =
	    hicn_punt_glb.udp64_vnet_tbl_idx[swif][skip][HICN_PUNT_SRC][mask];

	  hicn_punt_add_vnettbl_udp (&ipv64, &ipv6, &udp64_dst, mask,
				     table_index, swif, ETH_L2);

	  /*
	   * Add a session for the specified ip address and
	   * subnet mask
	   */
	  hicn_punt_add_vnetssn_udp (&ipv64, &ipv4, &udp64_src,
				     prefix, mask,
				     hicn_punt_glb.next_hit_data_udp6,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);

	  hicn_punt_add_vnetssn_udp (&ipv64, &ipv4, &udp64_dst,
				     prefix, mask,
				     hicn_punt_glb.next_hit_interest_udp6,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);

	  hicn_punt_enable_disable_vnet_ip6_table_on_intf (vm, swif,
							   OP_ENABLE);
	}
    }
  else
    {
      if (punt_type == HICN_PUNT_UDP4_TYPE)
	{
	  skip = 2;
	  /* Create Vnet table for a given mask */
	  if (mask > 96)
	    return HICN_ERROR_PUNT_INVAL;

	  hicn_punt_add_vnettbl_udp (&ipv46, &ipv4, &udp46_src, mask, ~0,
				     swif, ETH_L2);

	  table_index =
	    hicn_punt_glb.udp46_vnet_tbl_idx[swif][skip][HICN_PUNT_SRC][mask];
	  hicn_punt_add_vnettbl_udp (&ipv46, &ipv4, &udp46_dst, mask,
				     table_index, swif, ETH_L2);

	  /*
	   * Add a session for the specified ip address and
	   * subnet mask
	   */
	  hicn_punt_add_vnetssn_udp (&ipv46, &ipv4, &udp46_src,
				     prefix, mask,
				     hicn_punt_glb.next_hit_data_udp4,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);
	  hicn_punt_add_vnetssn_udp (&ipv46, &ipv4, &udp46_dst,
				     prefix, mask,
				     hicn_punt_glb.next_hit_interest_udp4,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);

	  hicn_punt_enable_disable_vnet_ip4_table_on_intf (vm, swif,
							   OP_ENABLE);
	}
      else
	{
	  if (mask > 122)
	    return HICN_ERROR_PUNT_INVAL;
	  
	  skip = 3;
	  hicn_punt_add_vnettbl_udp (&ipv66, &ipv6, &udp66_src, mask, ~0,
				     swif, ETH_L2);

	  table_index =
	    hicn_punt_glb.udp66_vnet_tbl_idx[swif][skip][HICN_PUNT_SRC][mask];
	  hicn_punt_add_vnettbl_udp (&ipv66, &ipv6, &udp66_dst, mask,
				     table_index, swif, ETH_L2);

	  /*
	   * Add a session for the specified ip address and
	   * subnet mask
	   */
	  hicn_punt_add_vnetssn_udp (&ipv66, &ipv6, &udp66_src,
				     prefix, mask,
				     hicn_punt_glb.next_hit_data_udp6,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);
	  hicn_punt_add_vnetssn_udp (&ipv66, &ipv6, &udp66_dst,
				     prefix, mask,
				     hicn_punt_glb.next_hit_interest_udp6,
				     swif, ETH_L2, IPPROTO_UDP, sport, dport);

	  hicn_punt_enable_disable_vnet_ip6_table_on_intf (vm, swif,
							   OP_ENABLE);
	}

    }
  return HICN_ERROR_NONE;
}



u32
hicn_punt_interest_data_for_ethernet (vlib_main_t * vm,
				      ip46_address_t * prefix, u8 mask,
				      u32 swif, u8 punt_type)
{
  int skip = 1;
  u32 table_index;
  u8 use_current_data = HICN_CLASSIFY_NO_CURRENT_DATA_FLAG;

  if (punt_type != HICN_PUNT_IP_TYPE && punt_type != HICN_PUNT_UDP4_TYPE
      && punt_type != HICN_PUNT_UDP6_TYPE)
    return HICN_ERROR_PUNT_INVAL;

  if (ip46_address_is_ip4 (prefix))
    {
      if (mask > IPV4_ADDR_LEN_BITS)
	return HICN_ERROR_PUNT_INVAL;

      if (punt_type == HICN_PUNT_IP_TYPE)
	{
	  /* Create Vnet table for a given mask */
	  hicn_punt_add_vnettbl (&ipv4, &ipv4_src, mask, ~0, swif, ETH_L2,
				 use_current_data);

	  table_index =
	    hicn_punt_glb.ip4_vnet_tbl_idx[swif][skip][HICN_PUNT_SRC][mask];

	  hicn_punt_add_vnettbl (&ipv4, &ipv4_dst, mask, table_index, swif,
				 ETH_L2, use_current_data);

	  /*
	   * Add a session for the specified ip address and
	   * subnet mask
	   */
	  hicn_punt_add_vnetssn (&ipv4, &ipv4_src,
				 prefix, mask,
				 hicn_punt_glb.next_hit_data_ipv4, swif,
				 ETH_L2);
	  hicn_punt_add_vnetssn (&ipv4, &ipv4_dst,
				 prefix, mask,
				 hicn_punt_glb.next_hit_interest_ipv4, swif,
				 ETH_L2);

	  hicn_punt_enable_disable_vnet_ip4_table_on_intf (vm, swif,
							   OP_ENABLE);
	}
      else
	{
	  return HICN_ERROR_PUNT_INVAL;
	}
    }
  else
    {
      if (punt_type == HICN_PUNT_IP_TYPE)
	{
	  if (mask > IPV6_ADDR_LEN_BITS)
	    return HICN_ERROR_PUNT_INVAL;

	  /* Create Vnet table for a given mask */
	  hicn_punt_add_vnettbl (&ipv6, &ipv6_src, mask, ~0, swif, ETH_L2,
				 use_current_data);

	  table_index =
	    hicn_punt_glb.ip6_vnet_tbl_idx[swif][skip][HICN_PUNT_SRC][mask];

	  hicn_punt_add_vnettbl (&ipv6, &ipv6_dst, mask, table_index, swif,
				 ETH_L2, use_current_data);

	  /*
	   * Add a session for the specified ip address and
	   * subnet mask
	   */
	  hicn_punt_add_vnetssn (&ipv6, &ipv6_src, prefix,
				 mask, hicn_punt_glb.next_hit_data_ipv6, swif,
				 ETH_L2);
	  hicn_punt_add_vnetssn (&ipv6, &ipv6_dst, prefix,
				 mask, hicn_punt_glb.next_hit_interest_ipv6,
				 swif, ETH_L2);

	  hicn_punt_enable_disable_vnet_ip6_table_on_intf (vm, swif,
							   OP_ENABLE);
	}
      else
	{
	  return HICN_ERROR_PUNT_INVAL;
	}

    }
  return HICN_ERROR_NONE;
}

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