aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/ipsec/ipsec_api.c
blob: a959ac643ec02368e6e78b469f574cb1cbfec2c8 (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
/*
 *------------------------------------------------------------------
 * ipsec_api.c - ipsec api
 *
 * Copyright (c) 2016 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 <vnet/vnet.h>
#include <vlibmemory/api.h>

#include <vnet/interface.h>
#include <vnet/api_errno.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip_types_api.h>
#include <vnet/fib/fib.h>
#include <vnet/ipip/ipip.h>

#include <vnet/vnet_msg_enum.h>

#if WITH_LIBSSL > 0
#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/ipsec_tun.h>
#endif /* IPSEC */

#define vl_typedefs		/* define message structures */
#include <vnet/vnet_all_api_h.h>
#undef vl_typedefs

#define vl_endianfun		/* define message structures */
#include <vnet/vnet_all_api_h.h>
#undef vl_endianfun

/* instantiate all the print functions we know about */
#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
#define vl_printfun
#include <vnet/vnet_all_api_h.h>
#undef vl_printfun

#include <vlibapi/api_helper_macros.h>

#define foreach_vpe_api_msg                                     \
_(IPSEC_SPD_ADD_DEL, ipsec_spd_add_del)                         \
_(IPSEC_INTERFACE_ADD_DEL_SPD, ipsec_interface_add_del_spd)     \
_(IPSEC_SPD_ENTRY_ADD_DEL, ipsec_spd_entry_add_del)             \
_(IPSEC_SAD_ENTRY_ADD_DEL, ipsec_sad_entry_add_del)             \
_(IPSEC_SA_DUMP, ipsec_sa_dump)                                 \
_(IPSEC_SPDS_DUMP, ipsec_spds_dump)                             \
_(IPSEC_SPD_DUMP, ipsec_spd_dump)                               \
_(IPSEC_SPD_INTERFACE_DUMP, ipsec_spd_interface_dump)		\
_(IPSEC_TUNNEL_IF_ADD_DEL, ipsec_tunnel_if_add_del)             \
_(IPSEC_TUNNEL_IF_SET_SA, ipsec_tunnel_if_set_sa)               \
_(IPSEC_SELECT_BACKEND, ipsec_select_backend)                   \
_(IPSEC_BACKEND_DUMP, ipsec_backend_dump)                       \
_(IPSEC_TUNNEL_PROTECT_UPDATE, ipsec_tunnel_protect_update)     \
_(IPSEC_TUNNEL_PROTECT_DEL, ipsec_tunnel_protect_del)           \
_(IPSEC_TUNNEL_PROTECT_DUMP, ipsec_tunnel_protect_dump)

static void
vl_api_ipsec_spd_add_del_t_handler (vl_api_ipsec_spd_add_del_t * mp)
{
#if WITH_LIBSSL == 0
  clib_warning ("unimplemented");
#else

  vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
  vl_api_ipsec_spd_add_del_reply_t *rmp;
  int rv;

  rv = ipsec_add_del_spd (vm, ntohl (mp->spd_id), mp->is_add);

  REPLY_MACRO (VL_API_IPSEC_SPD_ADD_DEL_REPLY);
#endif
}

static void vl_api_ipsec_interface_add_del_spd_t_handler
  (vl_api_ipsec_interface_add_del_spd_t * mp)
{
  vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
  vl_api_ipsec_interface_add_del_spd_reply_t *rmp;
  int rv;
  u32 sw_if_index __attribute__ ((unused));
  u32 spd_id __attribute__ ((unused));

  sw_if_index = ntohl (mp->sw_if_index);
  spd_id = ntohl (mp->spd_id);

  VALIDATE_SW_IF_INDEX (mp);

#if WITH_LIBSSL > 0
  rv = ipsec_set_interface_spd (vm, sw_if_index, spd_id, mp->is_add);
#else
  rv = VNET_API_ERROR_UNIMPLEMENTED;
#endif

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_IPSEC_INTERFACE_ADD_DEL_SPD_REPLY);
}

static void vl_api_ipsec_tunnel_protect_update_t_handler
  (vl_api_ipsec_tunnel_protect_update_t * mp)
{
  vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
  vl_api_ipsec_tunnel_protect_update_reply_t *rmp;
  u32 sw_if_index, ii, *sa_ins = NULL;
  int rv;

  sw_if_index = ntohl (mp->tunnel.sw_if_index);

  VALIDATE_SW_IF_INDEX (&(mp->tunnel));

#if WITH_LIBSSL > 0

  for (ii = 0; ii < mp->tunnel.n_sa_in; ii++)
    vec_add1 (sa_ins, ntohl (mp->tunnel.sa_in[ii]));

  rv = ipsec_tun_protect_update (sw_if_index,
				 ntohl (mp->tunnel.sa_out), sa_ins);
#else
  rv = VNET_API_ERROR_UNIMPLEMENTED;
#endif

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_IPSEC_TUNNEL_PROTECT_UPDATE_REPLY);
}

static void vl_api_ipsec_tunnel_protect_del_t_handler
  (vl_api_ipsec_tunnel_protect_del_t * mp)
{
  vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
  vl_api_ipsec_tunnel_protect_del_reply_t *rmp;
  int rv;
  u32 sw_if_index;

  sw_if_index = ntohl (mp->sw_if_index);

  VALIDATE_SW_IF_INDEX (mp);

#if WITH_LIBSSL > 0
  rv = ipsec_tun_protect_del (sw_if_index);
#else
  rv = VNET_API_ERROR_UNIMPLEMENTED;
#endif

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_IPSEC_TUNNEL_PROTECT_DEL_REPLY);
}

typedef struct ipsec_dump_walk_ctx_t_
{
  vl_api_registration_t *reg;
  u32 context;
} ipsec_dump_walk_ctx_t;

static walk_rc_t
send_ipsec_tunnel_protect_details (index_t itpi, void *arg)
{
  ipsec_dump_walk_ctx_t *ctx = arg;
  vl_api_ipsec_tunnel_protect_details_t *mp;
  ipsec_tun_protect_t *itp;
  u32 sai, ii = 0;

  itp = ipsec_tun_protect_get (itpi);


  mp = vl_msg_api_alloc (sizeof (*mp) + (sizeof (u32) * itp->itp_n_sa_in));
  clib_memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_IPSEC_TUNNEL_PROTECT_DETAILS);
  mp->context = ctx->context;

  mp->tun.sw_if_index = htonl (itp->itp_sw_if_index);

  mp->tun.sa_out = htonl (itp->itp_out_sa);
  mp->tun.n_sa_in = itp->itp_n_sa_in;
  /* *INDENT-OFF* */
  FOR_EACH_IPSEC_PROTECT_INPUT_SAI(itp, sai,
  ({
    mp->tun.sa_in[ii++] = htonl (sai);
  }));
  /* *INDENT-ON* */

  vl_api_send_msg (ctx->reg, (u8 *) mp);

  return (WALK_CONTINUE);
}

static void
vl_api_ipsec_tunnel_protect_dump_t_handler (vl_api_ipsec_tunnel_protect_dump_t
					    * mp)
{
  vl_api_registration_t *reg;
  u32 sw_if_index;

#if WITH_LIBSSL > 0
  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  ipsec_dump_walk_ctx_t ctx = {
    .reg = reg,
    .context = mp->context,
  };

  sw_if_index = ntohl (mp->sw_if_index);

  if (~0 == sw_if_index)
    {
      ipsec_tun_protect_walk (send_ipsec_tunnel_protect_details, &ctx);
    }
  else
    {
      index_t itpi;

      itpi = ipsec_tun_protect_find (sw_if_index);

      if (INDEX_INVALID != itpi)
	send_ipsec_tunnel_protect_details (itpi, &ctx);
    }
#else
  clib_warning ("unimplemented");
#endif
}

static int
ipsec_spd_action_decode (vl_api_ipsec_spd_action_t in,
			 ipsec_policy_action_t * out)
{
  in = clib_net_to_host_u32 (in);

  switch (in)
    {
#define _(v,f,s) case IPSEC_API_SPD_ACTION_##f: \
      *out = IPSEC_POLICY_ACTION_##f;              \
      return (0);
      foreach_ipsec_policy_action
#undef _
    }
  return (VNET_API_ERROR_UNIMPLEMENTED);
}

static void vl_api_ipsec_spd_entry_add_del_t_handler
  (vl_api_ipsec_spd_entry_add_del_t * mp)
{
  vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
  vl_api_ipsec_spd_entry_add_del_reply_t *rmp;
  ip46_type_t itype;
  u32 stat_index;
  int rv;

  stat_index = ~0;

#if WITH_LIBSSL > 0
  ipsec_policy_t p;

  clib_memset (&p, 0, sizeof (p));

  p.id = ntohl (mp->entry.spd_id);
  p.priority = ntohl (mp->entry.priority);

  itype = ip_address_decode (&mp->entry.remote_address_start, &p.raddr.start);
  ip_address_decode (&mp->entry.remote_address_stop, &p.raddr.stop);
  ip_address_decode (&mp->entry.local_address_start, &p.laddr.start);
  ip_address_decode (&mp->entry.local_address_stop, &p.laddr.stop);

  p.is_ipv6 = (itype == IP46_TYPE_IP6);

  p.protocol = mp->entry.protocol;
  p.rport.start = ntohs (mp->entry.remote_port_start);
  p.rport.stop = ntohs (mp->entry.remote_port_stop);
  p.lport.start = ntohs (mp->entry.local_port_start);
  p.lport.stop = ntohs (mp->entry.local_port_stop);

  rv = ipsec_spd_action_decode (mp->entry.policy, &p.policy);

  if (rv)
    goto out;

  /* policy action resolve unsupported */
  if (p.policy == IPSEC_POLICY_ACTION_RESOLVE)
    {
      clib_warning ("unsupported action: 'resolve'");
      rv = VNET_API_ERROR_UNIMPLEMENTED;
      goto out;
    }
  p.sa_id = ntohl (mp->entry.sa_id);
  rv =
    ipsec_policy_mk_type (mp->entry.is_outbound, p.is_ipv6, p.policy,
			  &p.type);
  if (rv)
    goto out;

  rv = ipsec_add_del_policy (vm, &p, mp->is_add, &stat_index);
  if (rv)
    goto out;

#else
  rv = VNET_API_ERROR_UNIMPLEMENTED;
  goto out;
#endif

out:
  /* *INDENT-OFF* */
  REPLY_MACRO2 (VL_API_IPSEC_SPD_ENTRY_ADD_DEL_REPLY,
  ({
    rmp->stat_index = ntohl(stat_index);
  }));
  /* *INDENT-ON* */
}

static int
ipsec_proto_decode (vl_api_ipsec_proto_t in, ipsec_protocol_t * out)
{
  in = clib_net_to_host_u32 (in);

  switch (in)
    {
    case IPSEC_API_PROTO_ESP:
      *out = IPSEC_PROTOCOL_ESP;
      return (0);
    case IPSEC_API_PROTO_AH:
      *out = IPSEC_PROTOCOL_AH;
      return (0);
    }
  return (VNET_API_ERROR_INVALID_PROTOCOL);
}

static vl_api_ipsec_proto_t
ipsec_proto_encode (ipsec_protocol_t p)
{
  switch (p)
    {
    case IPSEC_PROTOCOL_ESP:
      return clib_host_to_net_u32 (IPSEC_API_PROTO_ESP);
    case IPSEC_PROTOCOL_AH:
      return clib_host_to_net_u32 (IPSEC_API_PROTO_AH);
    }
  return (VNET_API_ERROR_UNIMPLEMENTED);
}

static int
ipsec_crypto_algo_decode (vl_api_ipsec_crypto_alg_t in,
			  ipsec_crypto_alg_t * out)
{
  in = clib_net_to_host_u32 (in);

  switch (in)
    {
#define _(v,f,s) case IPSEC_API_CRYPTO_ALG_##f: \
      *out = IPSEC_CRYPTO_ALG_##f;              \
      return (0);
      foreach_ipsec_crypto_alg
#undef _
    }
  return (VNET_API_ERROR_INVALID_ALGORITHM);
}

static vl_api_ipsec_crypto_alg_t
ipsec_crypto_algo_encode (ipsec_crypto_alg_t c)
{
  switch (c)
    {
#define _(v,f,s) case IPSEC_CRYPTO_ALG_##f:                     \
      return clib_host_to_net_u32(IPSEC_API_CRYPTO_ALG_##f);
      foreach_ipsec_crypto_alg
#undef _
    case IPSEC_CRYPTO_N_ALG:
      break;
    }
  ASSERT (0);
  return (VNET_API_ERROR_UNIMPLEMENTED);
}

static int
ipsec_integ_algo_decode (vl_api_ipsec_integ_alg_t in, ipsec_integ_alg_t * out)
{
  in = clib_net_to_host_u32 (in);

  switch (in)
    {
#define _(v,f,s) case IPSEC_API_INTEG_ALG_##f:  \
      *out = IPSEC_INTEG_ALG_##f;               \
      return (0);
      foreach_ipsec_integ_alg
#undef _
    }
  return (VNET_API_ERROR_INVALID_ALGORITHM);
}

static vl_api_ipsec_integ_alg_t
ipsec_integ_algo_encode (ipsec_integ_alg_t i)
{
  switch (i)
    {
#define _(v,f,s) case IPSEC_INTEG_ALG_##f:                      \
      return (clib_host_to_net_u32(IPSEC_API_INTEG_ALG_##f));
      foreach_ipsec_integ_alg
#undef _
    case IPSEC_INTEG_N_ALG:
      break;
    }
  ASSERT (0);
  return (VNET_API_ERROR_UNIMPLEMENTED);
}

static void
ipsec_key_decode (const vl_api_key_t * key, ipsec_key_t * out)
{
  ipsec_mk_key (out, key->data, key->length);
}

static void
ipsec_key_encode (const ipsec_key_t * in, vl_api_key_t * out)
{
  out->length = in->len;
  clib_memcpy (out->data, in->data, out->length);
}

static ipsec_sa_flags_t
ipsec_sa_flags_decode (vl_api_ipsec_sad_flags_t in)
{
  ipsec_sa_flags_t flags = IPSEC_SA_FLAG_NONE;
  in = clib_net_to_host_u32 (in);

  if (in & IPSEC_API_SAD_FLAG_USE_ESN)
    flags |= IPSEC_SA_FLAG_USE_ESN;
  if (in & IPSEC_API_SAD_FLAG_USE_ANTI_REPLAY)
    flags |= IPSEC_SA_FLAG_USE_ANTI_REPLAY;
  if (in & IPSEC_API_SAD_FLAG_IS_TUNNEL)
    flags |= IPSEC_SA_FLAG_IS_TUNNEL;
  if (in & IPSEC_API_SAD_FLAG_IS_TUNNEL_V6)
    flags |= IPSEC_SA_FLAG_IS_TUNNEL_V6;
  if (in & IPSEC_API_SAD_FLAG_UDP_ENCAP)
    flags |= IPSEC_SA_FLAG_UDP_ENCAP;

  return (flags);
}

static vl_api_ipsec_sad_flags_t
ipsec_sad_flags_encode (const ipsec_sa_t * sa)
{
  vl_api_ipsec_sad_flags_t flags = IPSEC_API_SAD_FLAG_NONE;

  if (ipsec_sa_is_set_USE_ESN (sa))
    flags |= IPSEC_API_SAD_FLAG_USE_ESN;
  if (ipsec_sa_is_set_USE_ANTI_REPLAY (sa))
    flags |= IPSEC_API_SAD_FLAG_USE_ANTI_REPLAY;
  if (ipsec_sa_is_set_IS_TUNNEL (sa))
    flags |= IPSEC_API_SAD_FLAG_IS_TUNNEL;
  if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
    flags |= IPSEC_API_SAD_FLAG_IS_TUNNEL_V6;
  if (ipsec_sa_is_set_UDP_ENCAP (sa))
    flags |= IPSEC_API_SAD_FLAG_UDP_ENCAP;

  return clib_host_to_net_u32 (flags);
}

static void vl_api_ipsec_sad_entry_add_del_t_handler
  (vl_api_ipsec_sad_entry_add_del_t * mp)
{
  vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
  vl_api_ipsec_sad_entry_add_del_reply_t *rmp;
  ip46_address_t tun_src = { }, tun_dst =
  {
  };
  ipsec_key_t crypto_key, integ_key;
  ipsec_crypto_alg_t crypto_alg;
  ipsec_integ_alg_t integ_alg;
  ipsec_protocol_t proto;
  ipsec_sa_flags_t flags;
  u32 id, spi, sa_index = ~0;
  int rv;

#if WITH_LIBSSL > 0

  id = ntohl (mp->entry.sad_id);
  spi = ntohl (mp->entry.spi);

  rv = ipsec_proto_decode (mp->entry.protocol, &proto);

  if (rv)
    goto out;

  rv = ipsec_crypto_algo_decode (mp->entry.crypto_algorithm, &crypto_alg);

  if (rv)
    goto out;

  rv = ipsec_integ_algo_decode (mp->entry.integrity_algorithm, &integ_alg);

  if (rv)
    goto out;

  ipsec_key_decode (&mp->entry.crypto_key, &crypto_key);
  ipsec_key_decode (&mp->entry.integrity_key, &integ_key);

  flags = ipsec_sa_flags_decode (mp->entry.flags);

  ip_address_decode (&mp->entry.tunnel_src, &tun_src);
  ip_address_decode (&mp->entry.tunnel_dst, &tun_dst);

  if (mp->is_add)
    rv = ipsec_sa_add_and_lock (id, spi, proto,
				crypto_alg, &crypto_key,
				integ_alg, &integ_key, flags,
				0, mp->entry.salt, &tun_src, &tun_dst,
				&sa_index);
  else
    rv = ipsec_sa_unlock_id (id);

#else
  rv = VNET_API_ERROR_UNIMPLEMENTED;
#endif

out:
  /* *INDENT-OFF* */
  REPLY_MACRO2 (VL_API_IPSEC_SAD_ENTRY_ADD_DEL_REPLY,
  {
    rmp->stat_index = htonl (sa_index);
  });
  /* *INDENT-ON* */
}

static void
send_ipsec_spds_details (ipsec_spd_t * spd, vl_api_registration_t * reg,
			 u32 context)
{
  vl_api_ipsec_spds_details_t *mp;
  u32 n_policies = 0;

  mp = vl_msg_api_alloc (sizeof (*mp));
  clib_memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_IPSEC_SPDS_DETAILS);
  mp->context = context;

  mp->spd_id = htonl (spd->id);
#define _(s, n) n_policies += vec_len (spd->policies[IPSEC_SPD_POLICY_##s]);
  foreach_ipsec_spd_policy_type
#undef _
    mp->npolicies = htonl (n_policies);

  vl_api_send_msg (reg, (u8 *) mp);
}

static void
vl_api_ipsec_spds_dump_t_handler (vl_api_ipsec_spds_dump_t * mp)
{
  vl_api_registration_t *reg;
  ipsec_main_t *im = &ipsec_main;
  ipsec_spd_t *spd;
#if WITH_LIBSSL > 0
  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  /* *INDENT-OFF* */
  pool_foreach (spd, im->spds, ({
    send_ipsec_spds_details (spd, reg, mp->context);
  }));
  /* *INDENT-ON* */
#else
  clib_warning ("unimplemented");
#endif
}

vl_api_ipsec_spd_action_t
ipsec_spd_action_encode (ipsec_policy_action_t in)
{
  vl_api_ipsec_spd_action_t out = IPSEC_API_SPD_ACTION_BYPASS;

  switch (in)
    {
#define _(v,f,s) case IPSEC_POLICY_ACTION_##f: \
      out = IPSEC_API_SPD_ACTION_##f;          \
      break;
      foreach_ipsec_policy_action
#undef _
    }
  return (clib_host_to_net_u32 (out));
}

static void
send_ipsec_spd_details (ipsec_policy_t * p, vl_api_registration_t * reg,
			u32 context)
{
  vl_api_ipsec_spd_details_t *mp;

  mp = vl_msg_api_alloc (sizeof (*mp));
  clib_memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_IPSEC_SPD_DETAILS);
  mp->context = context;

  mp->entry.spd_id = htonl (p->id);
  mp->entry.priority = htonl (p->priority);
  mp->entry.is_outbound = ((p->type == IPSEC_SPD_POLICY_IP6_OUTBOUND) ||
			   (p->type == IPSEC_SPD_POLICY_IP4_OUTBOUND));

  ip_address_encode (&p->laddr.start, IP46_TYPE_ANY,
		     &mp->entry.local_address_start);
  ip_address_encode (&p->laddr.stop, IP46_TYPE_ANY,
		     &mp->entry.local_address_stop);
  ip_address_encode (&p->raddr.start, IP46_TYPE_ANY,
		     &mp->entry.remote_address_start);
  ip_address_encode (&p->raddr.stop, IP46_TYPE_ANY,
		     &mp->entry.remote_address_stop);
  mp->entry.local_port_start = htons (p->lport.start);
  mp->entry.local_port_stop = htons (p->lport.stop);
  mp->entry.remote_port_start = htons (p->rport.start);
  mp->entry.remote_port_stop = htons (p->rport.stop);
  mp->entry.protocol = p->protocol;
  mp->entry.policy = ipsec_spd_action_encode (p->policy);
  mp->entry.sa_id = htonl (p->sa_id);

  vl_api_send_msg (reg, (u8 *) mp);
}

static void
vl_api_ipsec_spd_dump_t_handler (vl_api_ipsec_spd_dump_t * mp)
{
  vl_api_registration_t *reg;
  ipsec_main_t *im = &ipsec_main;
  ipsec_spd_policy_type_t ptype;
  ipsec_policy_t *policy;
  ipsec_spd_t *spd;
  uword *p;
  u32 spd_index, *ii;
#if WITH_LIBSSL > 0
  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  p = hash_get (im->spd_index_by_spd_id, ntohl (mp->spd_id));
  if (!p)
    return;

  spd_index = p[0];
  spd = pool_elt_at_index (im->spds, spd_index);

  /* *INDENT-OFF* */
  FOR_EACH_IPSEC_SPD_POLICY_TYPE(ptype) {
    vec_foreach(ii, spd->policies[ptype])
      {
        policy = pool_elt_at_index(im->policies, *ii);

        if (mp->sa_id == ~(0) || ntohl (mp->sa_id) == policy->sa_id)
          send_ipsec_spd_details (policy, reg, mp->context);
      }
  }
  /* *INDENT-ON* */
#else
  clib_warning ("unimplemented");
#endif
}

static void
send_ipsec_spd_interface_details (vl_api_registration_t * reg, u32 spd_index,
				  u32 sw_if_index, u32 context)
{
  vl_api_ipsec_spd_interface_details_t *mp;

  mp = vl_msg_api_alloc (sizeof (*mp));
  clib_memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_IPSEC_SPD_INTERFACE_DETAILS);
  mp->context = context;

  mp->spd_index = htonl (spd_index);
  mp->sw_if_index = htonl (sw_if_index);

  vl_api_send_msg (reg, (u8 *) mp);
}

static void
vl_api_ipsec_spd_interface_dump_t_handler (vl_api_ipsec_spd_interface_dump_t *
					   mp)
{
  ipsec_main_t *im = &ipsec_main;
  vl_api_registration_t *reg;
  u32 k, v, spd_index;

#if WITH_LIBSSL > 0
  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  if (mp->spd_index_valid)
    {
      spd_index = ntohl (mp->spd_index);
      /* *INDENT-OFF* */
      hash_foreach(k, v, im->spd_index_by_sw_if_index, ({
        if (v == spd_index)
          send_ipsec_spd_interface_details(reg, v, k, mp->context);
      }));
      /* *INDENT-ON* */
    }
  else
    {
      /* *INDENT-OFF* */
      hash_foreach(k, v, im->spd_index_by_sw_if_index, ({
        send_ipsec_spd_interface_details(reg, v, k, mp->context);
      }));
      /* *INDENT-ON* */
    }

#else
  clib_warning ("unimplemented");
#endif
}

static u32
ipsec_tun_mk_input_sa_id (u32 ti)
{
  return (0x80000000 | ti);
}

static u32
ipsec_tun_mk_output_sa_id (u32 ti)
{
  return (0xc0000000 | ti);
}

static void
vl_api_ipsec_tunnel_if_add_del_t_handler (vl_api_ipsec_tunnel_if_add_del_t *
					  mp)
{
  vl_api_ipsec_tunnel_if_add_del_reply_t *rmp;
  u32 sw_if_index = ~0;
  int rv;

#if WITH_LIBSSL > 0
  ip46_address_t local_ip = ip46_address_initializer;
  ip46_address_t remote_ip = ip46_address_initializer;
  ipsec_key_t crypto_key, integ_key;
  ipsec_sa_flags_t flags;
  ip46_type_t local_ip_type, remote_ip_type;
  ipip_transport_t transport;
  u32 fib_index;

  local_ip_type = ip_address_decode (&mp->local_ip, &local_ip);
  remote_ip_type = ip_address_decode (&mp->remote_ip, &remote_ip);
  transport = (IP46_TYPE_IP6 == local_ip_type ?
	       IPIP_TRANSPORT_IP6 : IPIP_TRANSPORT_IP4);

  if (local_ip_type != remote_ip_type)
    {
      rv = VNET_API_ERROR_INVALID_VALUE;
      goto done;
    }

  flags = IPSEC_SA_FLAG_NONE;

  if (mp->udp_encap)
    flags |= IPSEC_SA_FLAG_UDP_ENCAP;
  if (mp->esn)
    flags |= IPSEC_SA_FLAG_USE_ESN;
  if (mp->anti_replay)
    flags |= IPSEC_SA_FLAG_USE_ANTI_REPLAY;

  ipsec_mk_key (&crypto_key, mp->remote_crypto_key,
		mp->remote_crypto_key_len);
  ipsec_mk_key (&integ_key, mp->remote_integ_key, mp->remote_integ_key_len);
  ipsec_mk_key (&crypto_key, mp->local_crypto_key, mp->local_crypto_key_len);
  ipsec_mk_key (&integ_key, mp->local_integ_key, mp->local_integ_key_len);

  fib_index =
    fib_table_find (fib_proto_from_ip46 (local_ip_type),
		    ntohl (mp->tx_table_id));

  if (~0 == fib_index)
    {
      rv = VNET_API_ERROR_NO_SUCH_FIB;
      goto done;
    }

  if (mp->is_add)
    {
      // remote = input, local = output
      /* create an ip-ip tunnel, then the two SA, then bind them */
      rv = ipip_add_tunnel (transport,
			    ntohl (mp->show_instance),
			    &local_ip,
			    &remote_ip, fib_index, 0, &sw_if_index);

      if (rv)
	goto done;

      rv = ipsec_sa_add_and_lock (ipsec_tun_mk_input_sa_id (sw_if_index),
				  ntohl (mp->remote_spi),
				  IPSEC_PROTOCOL_ESP,
				  mp->crypto_alg,
				  &crypto_key,
				  mp->integ_alg,
				  &integ_key,
				  (flags | IPSEC_SA_FLAG_IS_INBOUND),
				  ntohl (mp->tx_table_id),
				  mp->salt, &remote_ip, &local_ip, NULL);

      if (rv)
	goto done;

      rv = ipsec_sa_add_and_lock (ipsec_tun_mk_output_sa_id (sw_if_index),
				  ntohl (mp->local_spi),
				  IPSEC_PROTOCOL_ESP,
				  mp->crypto_alg,
				  &crypto_key,
				  mp->integ_alg,
				  &integ_key,
				  flags,
				  ntohl (mp->tx_table_id),
				  mp->salt, &local_ip, &remote_ip, NULL);

      if (rv)
	goto done;

      rv = ipsec_tun_protect_update_one (sw_if_index,
					 ipsec_tun_mk_output_sa_id
					 (sw_if_index),
					 ipsec_tun_mk_input_sa_id
					 (sw_if_index));
      if (rv)
	goto done;

      /* the SAs are locked as a result of being used for proection,
       * they cannot be removed from the API, since they cannot be refered
       * to by the API. unlock them now, so that if the tunnel is rekeyed
       * they-ll disapper
       */
      ipsec_sa_unlock_id (ipsec_tun_mk_input_sa_id (sw_if_index));
      ipsec_sa_unlock_id (ipsec_tun_mk_output_sa_id (sw_if_index));
    }
  else
    {
      /* *INDENT-OFF* */
      ipip_tunnel_key_t key = {
	.transport = transport,
	.fib_index = fib_index,
	.src = local_ip,
	.dst = remote_ip
      };
      /* *INDENT-ON* */

      ipip_tunnel_t *t = ipip_tunnel_db_find (&key);

      if (NULL != t)
	{
	  rv = ipsec_tun_protect_del (t->sw_if_index);
	  ipip_del_tunnel (t->sw_if_index);
	}
      else
	rv = VNET_API_ERROR_NO_SUCH_ENTRY;
    }

#else
  rv = VNET_API_ERROR_UNIMPLEMENTED;
#endif
done:
  /* *INDENT-OFF* */
  REPLY_MACRO2 (VL_API_IPSEC_TUNNEL_IF_ADD_DEL_REPLY,
  ({
    rmp->sw_if_index = htonl (sw_if_index);
  }));
  /* *INDENT-ON* */
}

typedef struct ipsec_sa_dump_match_ctx_t_
{
  index_t sai;
  u32 sw_if_index;
} ipsec_sa_dump_match_ctx_t;

static walk_rc_t
ipsec_sa_dump_match_sa (index_t itpi, void *arg)
{
  ipsec_sa_dump_match_ctx_t *ctx = arg;
  ipsec_tun_protect_t *itp;
  index_t sai;

  itp = ipsec_tun_protect_get (itpi);

  if (itp->itp_out_sa == ctx->sai)
    {
      ctx->sw_if_index = itp->itp_sw_if_index;
      return (WALK_STOP);
    }
  /* *INDENT-OFF* */
  FOR_EACH_IPSEC_PROTECT_INPUT_SAI (itp, sai,
  ({
    if (sai == ctx->sai)
      {
        ctx->sw_if_index = itp->itp_sw_if_index;
        return (WALK_STOP);
      }
  }));
  /* *INDENT-OFF* */

  return (WALK_CONTINUE);
}

static walk_rc_t
send_ipsec_sa_details (ipsec_sa_t * sa, void *arg)
{
  ipsec_dump_walk_ctx_t *ctx = arg;
  vl_api_ipsec_sa_details_t *mp;
  ipsec_main_t *im = &ipsec_main;

  mp = vl_msg_api_alloc (sizeof (*mp));
  clib_memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_IPSEC_SA_DETAILS);
  mp->context = ctx->context;

  mp->entry.sad_id = htonl (sa->id);
  mp->entry.spi = htonl (sa->spi);
  mp->entry.protocol = ipsec_proto_encode (sa->protocol);
  mp->entry.tx_table_id =
    htonl (fib_table_get_table_id (sa->tx_fib_index, FIB_PROTOCOL_IP4));

  mp->entry.crypto_algorithm = ipsec_crypto_algo_encode (sa->crypto_alg);
  ipsec_key_encode (&sa->crypto_key, &mp->entry.crypto_key);

  mp->entry.integrity_algorithm = ipsec_integ_algo_encode (sa->integ_alg);
  ipsec_key_encode (&sa->integ_key, &mp->entry.integrity_key);

  mp->entry.flags = ipsec_sad_flags_encode (sa);
  mp->entry.salt = clib_host_to_net_u32 (sa->salt);

  if (ipsec_sa_is_set_IS_PROTECT (sa))
    {
      ipsec_sa_dump_match_ctx_t ctx = {
        .sai = sa - im->sad,
        .sw_if_index = ~0,
      };
      ipsec_tun_protect_walk (ipsec_sa_dump_match_sa, &ctx);

      mp->sw_if_index = htonl (ctx.sw_if_index);
    }
  else
    mp->sw_if_index = ~0;

  if (ipsec_sa_is_set_IS_TUNNEL (sa))
    {
      ip_address_encode (&sa->tunnel_src_addr, IP46_TYPE_ANY,
			 &mp->entry.tunnel_src);
      ip_address_encode (&sa->tunnel_dst_addr, IP46_TYPE_ANY,
			 &mp->entry.tunnel_dst);
    }

  mp->seq_outbound = clib_host_to_net_u64 (((u64) sa->seq));
  mp->last_seq_inbound = clib_host_to_net_u64 (((u64) sa->last_seq));
  if (ipsec_sa_is_set_USE_ESN (sa))
    {
      mp->seq_outbound |= (u64) (clib_host_to_net_u32 (sa->seq_hi));
      mp->last_seq_inbound |= (u64) (clib_host_to_net_u32 (sa->last_seq_hi));
    }
  if (ipsec_sa_is_set_USE_ANTI_REPLAY (sa))
    mp->replay_window = clib_host_to_net_u64 (sa->replay_window);

  vl_api_send_msg (ctx->reg, (u8 *) mp);

  return (WALK_CONTINUE);
}

static void
vl_api_ipsec_sa_dump_t_handler (vl_api_ipsec_sa_dump_t * mp)
{
  vl_api_registration_t *reg;

#if WITH_LIBSSL > 0
  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  ipsec_dump_walk_ctx_t ctx = {
    .reg = reg,
    .context = mp->context,
  };

  ipsec_sa_walk (send_ipsec_sa_details, &ctx);

#else
  clib_warning ("unimplemented");
#endif
}

static void
vl_api_ipsec_tunnel_if_set_sa_t_handler (vl_api_ipsec_tunnel_if_set_sa_t * mp)
{
  vl_api_ipsec_tunnel_if_set_sa_reply_t *rmp;
  int rv;

#if WITH_LIBSSL > 0
  VALIDATE_SW_IF_INDEX(mp);

  if (mp->is_outbound)
    rv = ipsec_tun_protect_update_out (ntohl (mp->sw_if_index),
                                       ntohl (mp->sa_id));
  else
    rv = ipsec_tun_protect_update_in (ntohl (mp->sw_if_index),
                                       ntohl (mp->sa_id));

#else
  clib_warning ("unimplemented");
#endif

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_IPSEC_TUNNEL_IF_SET_SA_REPLY);
}

static void
vl_api_ipsec_backend_dump_t_handler (vl_api_ipsec_backend_dump_t * mp)
{
  vl_api_registration_t *rp;
  ipsec_main_t *im = &ipsec_main;
  u32 context = mp->context;

  rp = vl_api_client_index_to_registration (mp->client_index);

  if (rp == 0)
    {
      clib_warning ("Client %d AWOL", mp->client_index);
      return;
    }

  ipsec_ah_backend_t *ab;
  ipsec_esp_backend_t *eb;
  /* *INDENT-OFF* */
  pool_foreach (ab, im->ah_backends, {
    vl_api_ipsec_backend_details_t *mp = vl_msg_api_alloc (sizeof (*mp));
    clib_memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_IPSEC_BACKEND_DETAILS);
    mp->context = context;
    snprintf ((char *)mp->name, sizeof (mp->name), "%.*s", vec_len (ab->name),
              ab->name);
    mp->protocol = ntohl (IPSEC_API_PROTO_AH);
    mp->index = ab - im->ah_backends;
    mp->active = mp->index == im->ah_current_backend ? 1 : 0;
    vl_api_send_msg (rp, (u8 *)mp);
  });
  pool_foreach (eb, im->esp_backends, {
    vl_api_ipsec_backend_details_t *mp = vl_msg_api_alloc (sizeof (*mp));
    clib_memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_IPSEC_BACKEND_DETAILS);
    mp->context = context;
    snprintf ((char *)mp->name, sizeof (mp->name), "%.*s", vec_len (eb->name),
              eb->name);
    mp->protocol = ntohl (IPSEC_API_PROTO_ESP);
    mp->index = eb - im->esp_backends;
    mp->active = mp->index == im->esp_current_backend ? 1 : 0;
    vl_api_send_msg (rp, (u8 *)mp);
  });
  /* *INDENT-ON* */
}

static void
vl_api_ipsec_select_backend_t_handler (vl_api_ipsec_select_backend_t * mp)
{
  ipsec_main_t *im = &ipsec_main;
  vl_api_ipsec_select_backend_reply_t *rmp;
  ipsec_protocol_t protocol;
  int rv = 0;
  if (pool_elts (im->sad) > 0)
    {
      rv = VNET_API_ERROR_INSTANCE_IN_USE;
      goto done;
    }

  rv = ipsec_proto_decode (mp->protocol, &protocol);

  if (rv)
    goto done;

#if WITH_LIBSSL > 0
  switch (protocol)
    {
    case IPSEC_PROTOCOL_ESP:
      rv = ipsec_select_esp_backend (im, mp->index);
      break;
    case IPSEC_PROTOCOL_AH:
      rv = ipsec_select_ah_backend (im, mp->index);
      break;
    default:
      rv = VNET_API_ERROR_INVALID_PROTOCOL;
      break;
    }
#else
  clib_warning ("unimplemented");	/* FIXME */
#endif
done:
  REPLY_MACRO (VL_API_IPSEC_SELECT_BACKEND_REPLY);
}

/*
 * ipsec_api_hookup
 * Add vpe's API message handlers to the table.
 * vlib has already mapped shared memory and
 * added the client registration handlers.
 * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
 */
#define vl_msg_name_crc_list
#include <vnet/vnet_all_api_h.h>
#undef vl_msg_name_crc_list

static void
setup_message_id_table (api_main_t * am)
{
#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
  foreach_vl_msg_name_crc_ipsec;
#undef _
}

static clib_error_t *
ipsec_api_hookup (vlib_main_t * vm)
{
  api_main_t *am = &api_main;

#define _(N,n)                                                  \
    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
                           vl_api_##n##_t_handler,              \
                           vl_noop_handler,                     \
                           vl_api_##n##_t_endian,               \
                           vl_api_##n##_t_print,                \
                           sizeof(vl_api_##n##_t), 1);
  foreach_vpe_api_msg;
#undef _

  /*
   * Adding and deleting SAs is MP safe since when they are added/delete
   * no traffic is using them
   */
  am->is_mp_safe[VL_API_IPSEC_SAD_ENTRY_ADD_DEL] = 1;
  am->is_mp_safe[VL_API_IPSEC_SAD_ENTRY_ADD_DEL_REPLY] = 1;

  /*
   * Set up the (msg_name, crc, message-id) table
   */
  setup_message_id_table (am);

  return 0;
}

VLIB_API_INIT_FUNCTION (ipsec_api_hookup);

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