/
sa.c
2424 lines (2073 loc) · 70.6 KB
/
sa.c
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
/* SPDX-License-Identifier: LGPL-2.1-only */
/*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* @ingroup xfrmnl
* @defgroup sa Security Association
* @brief
*/
#include "nl-default.h"
#include <time.h>
#include <netlink/netlink.h>
#include <netlink/cache.h>
#include <netlink/object.h>
#include <netlink/xfrm/sa.h>
#include <netlink/xfrm/selector.h>
#include <netlink/xfrm/lifetime.h>
#include "nl-xfrm.h"
#include "nl-priv-dynamic-core/object-api.h"
#include "nl-priv-dynamic-core/nl-core.h"
#include "nl-priv-dynamic-core/cache-api.h"
#include "nl-aux-core/nl-core.h"
/** @cond SKIP */
struct xfrmnl_stats {
uint32_t replay_window;
uint32_t replay;
uint32_t integrity_failed;
};
struct xfrmnl_algo_aead {
char alg_name[64];
uint32_t alg_key_len; /* in bits */
uint32_t alg_icv_len; /* in bits */
char alg_key[0];
};
struct xfrmnl_algo_auth {
char alg_name[64];
uint32_t alg_key_len; /* in bits */
uint32_t alg_trunc_len; /* in bits */
char alg_key[0];
};
struct xfrmnl_algo {
char alg_name[64];
uint32_t alg_key_len; /* in bits */
char alg_key[0];
};
struct xfrmnl_encap_tmpl {
uint16_t encap_type;
uint16_t encap_sport;
uint16_t encap_dport;
struct nl_addr* encap_oa;
};
struct xfrmnl_user_offload {
int ifindex;
uint8_t flags;
};
struct xfrmnl_sa {
NLHDR_COMMON
struct xfrmnl_sel* sel;
struct xfrmnl_id id;
struct nl_addr* saddr;
struct xfrmnl_ltime_cfg* lft;
struct xfrmnl_lifetime_cur curlft;
struct xfrmnl_stats stats;
uint32_t seq;
uint32_t reqid;
uint16_t family;
uint8_t mode; /* XFRM_MODE_xxx */
uint8_t replay_window;
uint8_t flags;
struct xfrmnl_algo_aead* aead;
struct xfrmnl_algo_auth* auth;
struct xfrmnl_algo* crypt;
struct xfrmnl_algo* comp;
struct xfrmnl_encap_tmpl* encap;
uint32_t tfcpad;
struct nl_addr* coaddr;
struct xfrmnl_mark mark;
struct xfrmnl_user_sec_ctx* sec_ctx;
uint32_t replay_maxage;
uint32_t replay_maxdiff;
struct xfrmnl_replay_state replay_state;
struct xfrmnl_replay_state_esn* replay_state_esn;
uint8_t hard;
struct xfrmnl_user_offload* user_offload;
};
#define XFRM_SA_ATTR_SEL 0x01
#define XFRM_SA_ATTR_DADDR 0x02
#define XFRM_SA_ATTR_SPI 0x04
#define XFRM_SA_ATTR_PROTO 0x08
#define XFRM_SA_ATTR_SADDR 0x10
#define XFRM_SA_ATTR_LTIME_CFG 0x20
#define XFRM_SA_ATTR_LTIME_CUR 0x40
#define XFRM_SA_ATTR_STATS 0x80
#define XFRM_SA_ATTR_SEQ 0x100
#define XFRM_SA_ATTR_REQID 0x200
#define XFRM_SA_ATTR_FAMILY 0x400
#define XFRM_SA_ATTR_MODE 0x800
#define XFRM_SA_ATTR_REPLAY_WIN 0x1000
#define XFRM_SA_ATTR_FLAGS 0x2000
#define XFRM_SA_ATTR_ALG_AEAD 0x4000
#define XFRM_SA_ATTR_ALG_AUTH 0x8000
#define XFRM_SA_ATTR_ALG_CRYPT 0x10000
#define XFRM_SA_ATTR_ALG_COMP 0x20000
#define XFRM_SA_ATTR_ENCAP 0x40000
#define XFRM_SA_ATTR_TFCPAD 0x80000
#define XFRM_SA_ATTR_COADDR 0x100000
#define XFRM_SA_ATTR_MARK 0x200000
#define XFRM_SA_ATTR_SECCTX 0x400000
#define XFRM_SA_ATTR_REPLAY_MAXAGE 0x800000
#define XFRM_SA_ATTR_REPLAY_MAXDIFF 0x1000000
#define XFRM_SA_ATTR_REPLAY_STATE 0x2000000
#define XFRM_SA_ATTR_EXPIRE 0x4000000
#define XFRM_SA_ATTR_OFFLOAD_DEV 0x8000000
static struct nl_cache_ops xfrmnl_sa_ops;
static struct nl_object_ops xfrm_sa_obj_ops;
/** @endcond */
static void xfrm_sa_alloc_data(struct nl_object *c)
{
struct xfrmnl_sa* sa = nl_object_priv (c);
if ((sa->sel = xfrmnl_sel_alloc ()) == NULL)
return;
if ((sa->lft = xfrmnl_ltime_cfg_alloc ()) == NULL)
return;
}
static void xfrm_sa_free_data(struct nl_object *c)
{
struct xfrmnl_sa* sa = nl_object_priv (c);
if (sa == NULL)
return;
xfrmnl_sel_put (sa->sel);
xfrmnl_ltime_cfg_put (sa->lft);
nl_addr_put (sa->id.daddr);
nl_addr_put (sa->saddr);
if (sa->aead)
free (sa->aead);
if (sa->auth)
free (sa->auth);
if (sa->crypt)
free (sa->crypt);
if (sa->comp)
free (sa->comp);
if (sa->encap) {
if (sa->encap->encap_oa)
nl_addr_put(sa->encap->encap_oa);
free(sa->encap);
}
if (sa->coaddr)
nl_addr_put (sa->coaddr);
if (sa->sec_ctx)
free (sa->sec_ctx);
if (sa->replay_state_esn)
free (sa->replay_state_esn);
if (sa->user_offload)
free(sa->user_offload);
}
static int xfrm_sa_clone(struct nl_object *_dst, struct nl_object *_src)
{
struct xfrmnl_sa* dst = nl_object_priv(_dst);
struct xfrmnl_sa* src = nl_object_priv(_src);
uint32_t len = 0;
dst->sel = NULL;
dst->id.daddr = NULL;
dst->saddr = NULL;
dst->lft = NULL;
dst->aead = NULL;
dst->auth = NULL;
dst->crypt = NULL;
dst->comp = NULL;
dst->encap = NULL;
dst->coaddr = NULL;
dst->sec_ctx = NULL;
dst->replay_state_esn = NULL;
dst->user_offload = NULL;
if (src->sel)
if ((dst->sel = xfrmnl_sel_clone (src->sel)) == NULL)
return -NLE_NOMEM;
if (src->lft)
if ((dst->lft = xfrmnl_ltime_cfg_clone (src->lft)) == NULL)
return -NLE_NOMEM;
if (src->id.daddr)
if ((dst->id.daddr = nl_addr_clone (src->id.daddr)) == NULL)
return -NLE_NOMEM;
if (src->saddr)
if ((dst->saddr = nl_addr_clone (src->saddr)) == NULL)
return -NLE_NOMEM;
if (src->aead) {
len = sizeof (struct xfrmnl_algo_aead) + ((src->aead->alg_key_len + 7) / 8);
if ((dst->aead = calloc (1, len)) == NULL)
return -NLE_NOMEM;
memcpy ((void *)dst->aead, (void *)src->aead, len);
}
if (src->auth) {
len = sizeof (struct xfrmnl_algo_auth) + ((src->auth->alg_key_len + 7) / 8);
if ((dst->auth = calloc (1, len)) == NULL)
return -NLE_NOMEM;
memcpy ((void *)dst->auth, (void *)src->auth, len);
}
if (src->crypt) {
len = sizeof (struct xfrmnl_algo) + ((src->crypt->alg_key_len + 7) / 8);
if ((dst->crypt = calloc (1, len)) == NULL)
return -NLE_NOMEM;
memcpy ((void *)dst->crypt, (void *)src->crypt, len);
}
if (src->comp) {
len = sizeof (struct xfrmnl_algo) + ((src->comp->alg_key_len + 7) / 8);
if ((dst->comp = calloc (1, len)) == NULL)
return -NLE_NOMEM;
memcpy ((void *)dst->comp, (void *)src->comp, len);
}
if (src->encap) {
len = sizeof (struct xfrmnl_encap_tmpl);
if ((dst->encap = calloc (1, len)) == NULL)
return -NLE_NOMEM;
memcpy ((void *)dst->encap, (void *)src->encap, len);
}
if (src->coaddr)
if ((dst->coaddr = nl_addr_clone (src->coaddr)) == NULL)
return -NLE_NOMEM;
if (src->sec_ctx) {
len = sizeof (*src->sec_ctx) + src->sec_ctx->ctx_len;
if ((dst->sec_ctx = calloc (1, len)) == NULL)
return -NLE_NOMEM;
memcpy ((void *)dst->sec_ctx, (void *)src->sec_ctx, len);
}
if (src->replay_state_esn) {
len = sizeof (struct xfrmnl_replay_state_esn) + (src->replay_state_esn->bmp_len * sizeof (uint32_t));
if ((dst->replay_state_esn = calloc (1, len)) == NULL)
return -NLE_NOMEM;
memcpy ((void *)dst->replay_state_esn, (void *)src->replay_state_esn, len);
}
if (src->user_offload) {
dst->user_offload = _nl_memdup_ptr(src->user_offload);
if (!dst->user_offload)
return -NLE_NOMEM;
}
return 0;
}
static uint64_t xfrm_sa_compare(struct nl_object *_a, struct nl_object *_b,
uint64_t attrs, int flags)
{
struct xfrmnl_sa* a = (struct xfrmnl_sa *) _a;
struct xfrmnl_sa* b = (struct xfrmnl_sa *) _b;
uint64_t diff = 0;
int found = 0;
#define _DIFF(ATTR, EXPR) ATTR_DIFF(attrs, ATTR, a, b, EXPR)
diff |= _DIFF(XFRM_SA_ATTR_SEL, xfrmnl_sel_cmp(a->sel, b->sel));
diff |= _DIFF(XFRM_SA_ATTR_DADDR,
nl_addr_cmp(a->id.daddr, b->id.daddr));
diff |= _DIFF(XFRM_SA_ATTR_SPI, a->id.spi != b->id.spi);
diff |= _DIFF(XFRM_SA_ATTR_PROTO, a->id.proto != b->id.proto);
diff |= _DIFF(XFRM_SA_ATTR_SADDR, nl_addr_cmp(a->saddr, b->saddr));
diff |= _DIFF(XFRM_SA_ATTR_LTIME_CFG,
xfrmnl_ltime_cfg_cmp(a->lft, b->lft));
diff |= _DIFF(XFRM_SA_ATTR_REQID, a->reqid != b->reqid);
diff |= _DIFF(XFRM_SA_ATTR_FAMILY, a->family != b->family);
diff |= _DIFF(XFRM_SA_ATTR_MODE, a->mode != b->mode);
diff |= _DIFF(XFRM_SA_ATTR_REPLAY_WIN,
a->replay_window != b->replay_window);
diff |= _DIFF(XFRM_SA_ATTR_FLAGS, a->flags != b->flags);
diff |= _DIFF(XFRM_SA_ATTR_ALG_AEAD,
(strcmp(a->aead->alg_name, b->aead->alg_name) ||
(a->aead->alg_key_len != b->aead->alg_key_len) ||
(a->aead->alg_icv_len != b->aead->alg_icv_len) ||
memcmp(a->aead->alg_key, b->aead->alg_key,
((a->aead->alg_key_len + 7) / 8))));
diff |= _DIFF(XFRM_SA_ATTR_ALG_AUTH,
(strcmp(a->auth->alg_name, b->auth->alg_name) ||
(a->auth->alg_key_len != b->auth->alg_key_len) ||
(a->auth->alg_trunc_len != b->auth->alg_trunc_len) ||
memcmp(a->auth->alg_key, b->auth->alg_key,
((a->auth->alg_key_len + 7) / 8))));
diff |= _DIFF(XFRM_SA_ATTR_ALG_CRYPT,
(strcmp(a->crypt->alg_name, b->crypt->alg_name) ||
(a->crypt->alg_key_len != b->crypt->alg_key_len) ||
memcmp(a->crypt->alg_key, b->crypt->alg_key,
((a->crypt->alg_key_len + 7) / 8))));
diff |= _DIFF(XFRM_SA_ATTR_ALG_COMP,
(strcmp(a->comp->alg_name, b->comp->alg_name) ||
(a->comp->alg_key_len != b->comp->alg_key_len) ||
memcmp(a->comp->alg_key, b->comp->alg_key,
((a->comp->alg_key_len + 7) / 8))));
diff |= _DIFF(XFRM_SA_ATTR_ENCAP,
((a->encap->encap_type != b->encap->encap_type) ||
(a->encap->encap_sport != b->encap->encap_sport) ||
(a->encap->encap_dport != b->encap->encap_dport) ||
nl_addr_cmp(a->encap->encap_oa, b->encap->encap_oa)));
diff |= _DIFF(XFRM_SA_ATTR_TFCPAD, a->tfcpad != b->tfcpad);
diff |= _DIFF(XFRM_SA_ATTR_COADDR, nl_addr_cmp(a->coaddr, b->coaddr));
diff |= _DIFF(XFRM_SA_ATTR_MARK,
(a->mark.m != b->mark.m) || (a->mark.v != b->mark.v));
diff |= _DIFF(XFRM_SA_ATTR_SECCTX,
((a->sec_ctx->ctx_doi != b->sec_ctx->ctx_doi) ||
(a->sec_ctx->ctx_alg != b->sec_ctx->ctx_alg) ||
(a->sec_ctx->ctx_len != b->sec_ctx->ctx_len) ||
strcmp(a->sec_ctx->ctx, b->sec_ctx->ctx)));
diff |= _DIFF(XFRM_SA_ATTR_REPLAY_MAXAGE,
a->replay_maxage != b->replay_maxage);
diff |= _DIFF(XFRM_SA_ATTR_REPLAY_MAXDIFF,
a->replay_maxdiff != b->replay_maxdiff);
diff |= _DIFF(XFRM_SA_ATTR_EXPIRE, a->hard != b->hard);
/* Compare replay states */
found = AVAILABLE_MISMATCH (a, b, XFRM_SA_ATTR_REPLAY_STATE);
if (found == 0) // attribute exists in both objects
{
if (((a->replay_state_esn != NULL) && (b->replay_state_esn == NULL)) ||
((a->replay_state_esn == NULL) && (b->replay_state_esn != NULL)))
found |= 1;
if (found == 0) // same replay type. compare actual values
{
if (a->replay_state_esn)
{
if (a->replay_state_esn->bmp_len != b->replay_state_esn->bmp_len)
diff |= 1;
else
{
uint32_t len = sizeof (struct xfrmnl_replay_state_esn) +
(a->replay_state_esn->bmp_len * sizeof (uint32_t));
diff |= memcmp (a->replay_state_esn, b->replay_state_esn, len);
}
}
else
{
if ((a->replay_state.oseq != b->replay_state.oseq) ||
(a->replay_state.seq != b->replay_state.seq) ||
(a->replay_state.bitmap != b->replay_state.bitmap))
diff |= 1;
}
}
}
#undef _DIFF
return diff;
}
/**
* @name XFRM SA Attribute Translations
* @{
*/
static const struct trans_tbl sa_attrs[] = {
__ADD(XFRM_SA_ATTR_SEL, selector),
__ADD(XFRM_SA_ATTR_DADDR, daddr),
__ADD(XFRM_SA_ATTR_SPI, spi),
__ADD(XFRM_SA_ATTR_PROTO, proto),
__ADD(XFRM_SA_ATTR_SADDR, saddr),
__ADD(XFRM_SA_ATTR_LTIME_CFG, lifetime_cfg),
__ADD(XFRM_SA_ATTR_LTIME_CUR, lifetime_cur),
__ADD(XFRM_SA_ATTR_STATS, stats),
__ADD(XFRM_SA_ATTR_SEQ, seqnum),
__ADD(XFRM_SA_ATTR_REQID, reqid),
__ADD(XFRM_SA_ATTR_FAMILY, family),
__ADD(XFRM_SA_ATTR_MODE, mode),
__ADD(XFRM_SA_ATTR_REPLAY_WIN, replay_window),
__ADD(XFRM_SA_ATTR_FLAGS, flags),
__ADD(XFRM_SA_ATTR_ALG_AEAD, alg_aead),
__ADD(XFRM_SA_ATTR_ALG_AUTH, alg_auth),
__ADD(XFRM_SA_ATTR_ALG_CRYPT, alg_crypto),
__ADD(XFRM_SA_ATTR_ALG_COMP, alg_comp),
__ADD(XFRM_SA_ATTR_ENCAP, encap),
__ADD(XFRM_SA_ATTR_TFCPAD, tfcpad),
__ADD(XFRM_SA_ATTR_COADDR, coaddr),
__ADD(XFRM_SA_ATTR_MARK, mark),
__ADD(XFRM_SA_ATTR_SECCTX, sec_ctx),
__ADD(XFRM_SA_ATTR_REPLAY_MAXAGE, replay_maxage),
__ADD(XFRM_SA_ATTR_REPLAY_MAXDIFF, replay_maxdiff),
__ADD(XFRM_SA_ATTR_REPLAY_STATE, replay_state),
__ADD(XFRM_SA_ATTR_EXPIRE, expire),
__ADD(XFRM_SA_ATTR_OFFLOAD_DEV, user_offload),
};
static char* xfrm_sa_attrs2str(int attrs, char *buf, size_t len)
{
return __flags2str (attrs, buf, len, sa_attrs, ARRAY_SIZE(sa_attrs));
}
/** @} */
/**
* @name XFRM SA Flags Translations
* @{
*/
static const struct trans_tbl sa_flags[] = {
__ADD(XFRM_STATE_NOECN, no ecn),
__ADD(XFRM_STATE_DECAP_DSCP, decap dscp),
__ADD(XFRM_STATE_NOPMTUDISC, no pmtu discovery),
__ADD(XFRM_STATE_WILDRECV, wild receive),
__ADD(XFRM_STATE_ICMP, icmp),
__ADD(XFRM_STATE_AF_UNSPEC, unspecified),
__ADD(XFRM_STATE_ALIGN4, align4),
__ADD(XFRM_STATE_ESN, esn),
};
char* xfrmnl_sa_flags2str(int flags, char *buf, size_t len)
{
return __flags2str (flags, buf, len, sa_flags, ARRAY_SIZE(sa_flags));
}
int xfrmnl_sa_str2flag(const char *name)
{
return __str2flags (name, sa_flags, ARRAY_SIZE(sa_flags));
}
/** @} */
/**
* @name XFRM SA Mode Translations
* @{
*/
static const struct trans_tbl sa_modes[] = {
__ADD(XFRM_MODE_TRANSPORT, transport),
__ADD(XFRM_MODE_TUNNEL, tunnel),
__ADD(XFRM_MODE_ROUTEOPTIMIZATION, route optimization),
__ADD(XFRM_MODE_IN_TRIGGER, in trigger),
__ADD(XFRM_MODE_BEET, beet),
};
char* xfrmnl_sa_mode2str(int mode, char *buf, size_t len)
{
return __type2str (mode, buf, len, sa_modes, ARRAY_SIZE(sa_modes));
}
int xfrmnl_sa_str2mode(const char *name)
{
return __str2type (name, sa_modes, ARRAY_SIZE(sa_modes));
}
/** @} */
static void xfrm_sa_dump_line(struct nl_object *a, struct nl_dump_params *p)
{
char dst[INET6_ADDRSTRLEN+5], src[INET6_ADDRSTRLEN+5];
struct xfrmnl_sa* sa = (struct xfrmnl_sa *) a;
char flags[128], mode[128];
time_t add_time, use_time;
struct tm *add_time_tm, *use_time_tm;
struct tm tm_buf;
nl_dump_line(p, "src %s dst %s family: %s\n", nl_addr2str(sa->saddr, src, sizeof(src)),
nl_addr2str(sa->id.daddr, dst, sizeof(dst)),
nl_af2str (sa->family, flags, sizeof (flags)));
nl_dump_line(p, "\tproto %s spi 0x%x reqid %u\n",
nl_ip_proto2str (sa->id.proto, flags, sizeof(flags)),
sa->id.spi, sa->reqid);
xfrmnl_sa_flags2str(sa->flags, flags, sizeof (flags));
xfrmnl_sa_mode2str(sa->mode, mode, sizeof (mode));
nl_dump_line(p, "\tmode: %s flags: %s (0x%x) seq: %u replay window: %u\n",
mode, flags, sa->flags, sa->seq, sa->replay_window);
nl_dump_line(p, "\tlifetime configuration: \n");
if (sa->lft->soft_byte_limit == XFRM_INF)
sprintf (flags, "INF");
else
sprintf (flags, "%" PRIu64, sa->lft->soft_byte_limit);
if (sa->lft->soft_packet_limit == XFRM_INF)
sprintf (mode, "INF");
else
sprintf (mode, "%" PRIu64, sa->lft->soft_packet_limit);
nl_dump_line(p, "\t\tsoft limit: %s (bytes), %s (packets)\n", flags, mode);
if (sa->lft->hard_byte_limit == XFRM_INF)
sprintf (flags, "INF");
else
sprintf (flags, "%" PRIu64, sa->lft->hard_byte_limit);
if (sa->lft->hard_packet_limit == XFRM_INF)
sprintf (mode, "INF");
else
sprintf (mode, "%" PRIu64, sa->lft->hard_packet_limit);
nl_dump_line(p, "\t\thard limit: %s (bytes), %s (packets)\n", flags,
mode);
nl_dump_line(
p,
"\t\tsoft add_time: %llu (seconds), soft use_time: %llu (seconds) \n",
(long long unsigned)sa->lft->soft_add_expires_seconds,
(long long unsigned)sa->lft->soft_use_expires_seconds);
nl_dump_line(
p,
"\t\thard add_time: %llu (seconds), hard use_time: %llu (seconds) \n",
(long long unsigned)sa->lft->hard_add_expires_seconds,
(long long unsigned)sa->lft->hard_use_expires_seconds);
nl_dump_line(p, "\tlifetime current: \n");
nl_dump_line(p, "\t\t%llu bytes, %llu packets\n",
(long long unsigned)sa->curlft.bytes,
(long long unsigned)sa->curlft.packets);
if (sa->curlft.add_time != 0)
{
add_time = sa->curlft.add_time;
add_time_tm = gmtime_r (&add_time, &tm_buf);
strftime (flags, 128, "%Y-%m-%d %H-%M-%S", add_time_tm);
}
else
{
sprintf (flags, "%s", "-");
}
if (sa->curlft.use_time != 0)
{
use_time = sa->curlft.use_time;
use_time_tm = gmtime_r (&use_time, &tm_buf);
strftime (mode, 128, "%Y-%m-%d %H-%M-%S", use_time_tm);
}
else
{
sprintf (mode, "%s", "-");
}
nl_dump_line(p, "\t\tadd_time: %s, use_time: %s\n", flags, mode);
if (sa->aead)
{
nl_dump_line(p, "\tAEAD Algo: \n");
nl_dump_line(p, "\t\tName: %s Key len(bits): %u ICV Len(bits): %u\n",
sa->aead->alg_name, sa->aead->alg_key_len, sa->aead->alg_icv_len);
}
if (sa->auth)
{
nl_dump_line(p, "\tAuth Algo: \n");
nl_dump_line(p, "\t\tName: %s Key len(bits): %u Trunc len(bits): %u\n",
sa->auth->alg_name, sa->auth->alg_key_len, sa->auth->alg_trunc_len);
}
if (sa->crypt)
{
nl_dump_line(p, "\tEncryption Algo: \n");
nl_dump_line(p, "\t\tName: %s Key len(bits): %u\n",
sa->crypt->alg_name, sa->crypt->alg_key_len);
}
if (sa->comp)
{
nl_dump_line(p, "\tCompression Algo: \n");
nl_dump_line(p, "\t\tName: %s Key len(bits): %u\n",
sa->comp->alg_name, sa->comp->alg_key_len);
}
if (sa->encap)
{
nl_dump_line(p, "\tEncapsulation template: \n");
nl_dump_line(p, "\t\tType: %d Src port: %d Dst port: %d Encap addr: %s\n",
sa->encap->encap_type, sa->encap->encap_sport, sa->encap->encap_dport,
nl_addr2str (sa->encap->encap_oa, dst, sizeof (dst)));
}
if (sa->ce_mask & XFRM_SA_ATTR_TFCPAD)
nl_dump_line(p, "\tTFC Pad: %u\n", sa->tfcpad);
if (sa->ce_mask & XFRM_SA_ATTR_COADDR)
nl_dump_line(p, "\tCO Address: %s\n", nl_addr2str (sa->coaddr, dst, sizeof (dst)));
if (sa->ce_mask & XFRM_SA_ATTR_MARK)
nl_dump_line(p, "\tMark mask: 0x%x Mark value: 0x%x\n", sa->mark.m, sa->mark.v);
if (sa->ce_mask & XFRM_SA_ATTR_SECCTX)
nl_dump_line(p, "\tDOI: %d Algo: %d Len: %u ctx: %s\n", sa->sec_ctx->ctx_doi,
sa->sec_ctx->ctx_alg, sa->sec_ctx->ctx_len, sa->sec_ctx->ctx);
nl_dump_line(p, "\treplay info: \n");
nl_dump_line(p, "\t\tmax age %u max diff %u \n", sa->replay_maxage, sa->replay_maxdiff);
if (sa->ce_mask & XFRM_SA_ATTR_REPLAY_STATE)
{
nl_dump_line(p, "\treplay state info: \n");
if (sa->replay_state_esn)
{
nl_dump_line(p, "\t\toseq %u seq %u oseq_hi %u seq_hi %u replay window: %u \n",
sa->replay_state_esn->oseq, sa->replay_state_esn->seq,
sa->replay_state_esn->oseq_hi, sa->replay_state_esn->seq_hi,
sa->replay_state_esn->replay_window);
}
else
{
nl_dump_line(p, "\t\toseq %u seq %u bitmap: %u \n", sa->replay_state.oseq,
sa->replay_state.seq, sa->replay_state.bitmap);
}
}
nl_dump_line(p, "\tselector info: \n");
xfrmnl_sel_dump (sa->sel, p);
nl_dump_line(p, "\tHard: %d\n", sa->hard);
nl_dump(p, "\n");
}
static void xfrm_sa_dump_stats(struct nl_object *a, struct nl_dump_params *p)
{
struct xfrmnl_sa* sa = (struct xfrmnl_sa*)a;
nl_dump_line(p, "\tstats: \n");
nl_dump_line(p, "\t\treplay window: %u replay: %u integrity failed: %u \n",
sa->stats.replay_window, sa->stats.replay, sa->stats.integrity_failed);
return;
}
static void xfrm_sa_dump_details(struct nl_object *a, struct nl_dump_params *p)
{
xfrm_sa_dump_line(a, p);
xfrm_sa_dump_stats (a, p);
}
/**
* @name XFRM SA Object Allocation/Freeage
* @{
*/
struct xfrmnl_sa* xfrmnl_sa_alloc(void)
{
return (struct xfrmnl_sa*) nl_object_alloc(&xfrm_sa_obj_ops);
}
void xfrmnl_sa_put(struct xfrmnl_sa* sa)
{
nl_object_put((struct nl_object *) sa);
}
/** @} */
/**
* @name SA Cache Managament
* @{
*/
/**
* Build a SA cache including all SAs currently configured in the kernel.
* @arg sock Netlink socket.
* @arg result Pointer to store resulting cache.
*
* Allocates a new SA cache, initializes it properly and updates it
* to include all SAs currently configured in the kernel.
*
* @return 0 on success or a negative error code.
*/
int xfrmnl_sa_alloc_cache(struct nl_sock *sock, struct nl_cache **result)
{
return nl_cache_alloc_and_fill(&xfrmnl_sa_ops, sock, result);
}
/**
* Look up a SA by destination address, SPI, protocol
* @arg cache SA cache
* @arg daddr destination address of the SA
* @arg spi SPI
* @arg proto protocol
* @return sa handle or NULL if no match was found.
*/
struct xfrmnl_sa* xfrmnl_sa_get(struct nl_cache* cache, struct nl_addr* daddr,
unsigned int spi, unsigned int proto)
{
struct xfrmnl_sa *sa;
//nl_list_for_each_entry(sa, &cache->c_items, ce_list) {
for (sa = (struct xfrmnl_sa*)nl_cache_get_first (cache);
sa != NULL;
sa = (struct xfrmnl_sa*)nl_cache_get_next ((struct nl_object*)sa))
{
if (sa->id.proto == proto &&
sa->id.spi == spi &&
!nl_addr_cmp(sa->id.daddr, daddr))
{
nl_object_get((struct nl_object *) sa);
return sa;
}
}
return NULL;
}
/** @} */
static struct nla_policy xfrm_sa_policy[XFRMA_MAX+1] = {
[XFRMA_SA] = { .minlen = sizeof(struct xfrm_usersa_info)},
[XFRMA_ALG_AUTH_TRUNC] = { .minlen = sizeof(struct xfrm_algo_auth)},
[XFRMA_ALG_AEAD] = { .minlen = sizeof(struct xfrm_algo_aead) },
[XFRMA_ALG_AUTH] = { .minlen = sizeof(struct xfrm_algo) },
[XFRMA_ALG_CRYPT] = { .minlen = sizeof(struct xfrm_algo) },
[XFRMA_ALG_COMP] = { .minlen = sizeof(struct xfrm_algo) },
[XFRMA_ENCAP] = { .minlen = sizeof(struct xfrm_encap_tmpl) },
[XFRMA_TMPL] = { .minlen = sizeof(struct xfrm_user_tmpl) },
[XFRMA_SEC_CTX] = { .minlen = sizeof(struct xfrm_sec_ctx) },
[XFRMA_LTIME_VAL] = { .minlen = sizeof(struct xfrm_lifetime_cur) },
[XFRMA_REPLAY_VAL] = { .minlen = sizeof(struct xfrm_replay_state) },
[XFRMA_OFFLOAD_DEV] = { .minlen = sizeof(struct xfrm_user_offload) },
[XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
[XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
[XFRMA_SRCADDR] = { .minlen = sizeof(xfrm_address_t) },
[XFRMA_COADDR] = { .minlen = sizeof(xfrm_address_t) },
[XFRMA_MARK] = { .minlen = sizeof(struct xfrm_mark) },
[XFRMA_TFCPAD] = { .type = NLA_U32 },
[XFRMA_REPLAY_ESN_VAL] = { .minlen = sizeof(struct xfrm_replay_state_esn) },
};
static int xfrm_sa_request_update(struct nl_cache *c, struct nl_sock *h)
{
return nl_send_simple (h, XFRM_MSG_GETSA, NLM_F_DUMP, NULL, 0);
}
int xfrmnl_sa_parse(struct nlmsghdr *n, struct xfrmnl_sa **result)
{
_nl_auto_nl_addr struct nl_addr *addr1 = NULL;
_nl_auto_nl_addr struct nl_addr *addr2 = NULL;
struct xfrmnl_sa* sa;
struct nlattr *tb[XFRMA_MAX + 1];
struct xfrm_usersa_info* sa_info;
struct xfrm_user_expire* ue;
int len, err;
sa = xfrmnl_sa_alloc();
if (!sa) {
err = -NLE_NOMEM;
goto errout;
}
sa->ce_msgtype = n->nlmsg_type;
if (n->nlmsg_type == XFRM_MSG_EXPIRE)
{
ue = nlmsg_data(n);
sa_info = &ue->state;
sa->hard = ue->hard;
sa->ce_mask |= XFRM_SA_ATTR_EXPIRE;
}
else if (n->nlmsg_type == XFRM_MSG_DELSA)
{
sa_info = (struct xfrm_usersa_info*)((char *)nlmsg_data(n) + sizeof (struct xfrm_usersa_id) + NLA_HDRLEN);
}
else
{
sa_info = nlmsg_data(n);
}
err = nlmsg_parse(n, sizeof(struct xfrm_usersa_info), tb, XFRMA_MAX, xfrm_sa_policy);
if (err < 0)
goto errout;
if (!(addr1 = _nl_addr_build(sa_info->sel.family, &sa_info->sel.daddr))) {
err = -NLE_NOMEM;
goto errout;
}
nl_addr_set_prefixlen (addr1, sa_info->sel.prefixlen_d);
xfrmnl_sel_set_daddr (sa->sel, addr1);
xfrmnl_sel_set_prefixlen_d (sa->sel, sa_info->sel.prefixlen_d);
if (!(addr2 = _nl_addr_build(sa_info->sel.family, &sa_info->sel.saddr))) {
err = -NLE_NOMEM;
goto errout;
}
nl_addr_set_prefixlen (addr2, sa_info->sel.prefixlen_s);
xfrmnl_sel_set_saddr (sa->sel, addr2);
xfrmnl_sel_set_prefixlen_s (sa->sel, sa_info->sel.prefixlen_s);
xfrmnl_sel_set_dport (sa->sel, ntohs(sa_info->sel.dport));
xfrmnl_sel_set_dportmask (sa->sel, ntohs(sa_info->sel.dport_mask));
xfrmnl_sel_set_sport (sa->sel, ntohs(sa_info->sel.sport));
xfrmnl_sel_set_sportmask (sa->sel, ntohs(sa_info->sel.sport_mask));
xfrmnl_sel_set_family (sa->sel, sa_info->sel.family);
xfrmnl_sel_set_proto (sa->sel, sa_info->sel.proto);
xfrmnl_sel_set_ifindex (sa->sel, sa_info->sel.ifindex);
xfrmnl_sel_set_userid (sa->sel, sa_info->sel.user);
sa->ce_mask |= XFRM_SA_ATTR_SEL;
if (!(sa->id.daddr = _nl_addr_build(sa_info->family, &sa_info->id.daddr))) {
err = -NLE_NOMEM;
goto errout;
}
sa->id.spi = ntohl(sa_info->id.spi);
sa->id.proto = sa_info->id.proto;
sa->ce_mask |= (XFRM_SA_ATTR_DADDR | XFRM_SA_ATTR_SPI | XFRM_SA_ATTR_PROTO);
if (!(sa->saddr = _nl_addr_build(sa_info->family, &sa_info->saddr))) {
err = -NLE_NOMEM;
goto errout;
}
sa->ce_mask |= XFRM_SA_ATTR_SADDR;
sa->lft->soft_byte_limit = sa_info->lft.soft_byte_limit;
sa->lft->hard_byte_limit = sa_info->lft.hard_byte_limit;
sa->lft->soft_packet_limit = sa_info->lft.soft_packet_limit;
sa->lft->hard_packet_limit = sa_info->lft.hard_packet_limit;
sa->lft->soft_add_expires_seconds = sa_info->lft.soft_add_expires_seconds;
sa->lft->hard_add_expires_seconds = sa_info->lft.hard_add_expires_seconds;
sa->lft->soft_use_expires_seconds = sa_info->lft.soft_use_expires_seconds;
sa->lft->hard_use_expires_seconds = sa_info->lft.hard_use_expires_seconds;
sa->ce_mask |= XFRM_SA_ATTR_LTIME_CFG;
sa->curlft.bytes = sa_info->curlft.bytes;
sa->curlft.packets = sa_info->curlft.packets;
sa->curlft.add_time = sa_info->curlft.add_time;
sa->curlft.use_time = sa_info->curlft.use_time;
sa->ce_mask |= XFRM_SA_ATTR_LTIME_CUR;
sa->stats.replay_window = sa_info->stats.replay_window;
sa->stats.replay = sa_info->stats.replay;
sa->stats.integrity_failed = sa_info->stats.integrity_failed;
sa->ce_mask |= XFRM_SA_ATTR_STATS;
sa->seq = sa_info->seq;
sa->reqid = sa_info->reqid;
sa->family = sa_info->family;
sa->mode = sa_info->mode;
sa->replay_window = sa_info->replay_window;
sa->flags = sa_info->flags;
sa->ce_mask |= (XFRM_SA_ATTR_SEQ | XFRM_SA_ATTR_REQID |
XFRM_SA_ATTR_FAMILY | XFRM_SA_ATTR_MODE |
XFRM_SA_ATTR_REPLAY_WIN | XFRM_SA_ATTR_FLAGS);
if (tb[XFRMA_ALG_AEAD]) {
struct xfrm_algo_aead* aead = nla_data(tb[XFRMA_ALG_AEAD]);
len = sizeof (struct xfrmnl_algo_aead) + ((aead->alg_key_len + 7) / 8);
if ((sa->aead = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
memcpy ((void *)sa->aead, (void *)aead, len);
sa->ce_mask |= XFRM_SA_ATTR_ALG_AEAD;
}
if (tb[XFRMA_ALG_AUTH_TRUNC]) {
struct xfrm_algo_auth* auth = nla_data(tb[XFRMA_ALG_AUTH_TRUNC]);
len = sizeof (struct xfrmnl_algo_auth) + ((auth->alg_key_len + 7) / 8);
if ((sa->auth = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
memcpy ((void *)sa->auth, (void *)auth, len);
sa->ce_mask |= XFRM_SA_ATTR_ALG_AUTH;
}
if (tb[XFRMA_ALG_AUTH] && !sa->auth) {
struct xfrm_algo* auth = nla_data(tb[XFRMA_ALG_AUTH]);
len = sizeof (struct xfrmnl_algo_auth) + ((auth->alg_key_len + 7) / 8);
if ((sa->auth = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
strcpy(sa->auth->alg_name, auth->alg_name);
memcpy(sa->auth->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
sa->auth->alg_key_len = auth->alg_key_len;
sa->ce_mask |= XFRM_SA_ATTR_ALG_AUTH;
}
if (tb[XFRMA_ALG_CRYPT]) {
struct xfrm_algo* crypt = nla_data(tb[XFRMA_ALG_CRYPT]);
len = sizeof (struct xfrmnl_algo) + ((crypt->alg_key_len + 7) / 8);
if ((sa->crypt = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
memcpy ((void *)sa->crypt, (void *)crypt, len);
sa->ce_mask |= XFRM_SA_ATTR_ALG_CRYPT;
}
if (tb[XFRMA_ALG_COMP]) {
struct xfrm_algo* comp = nla_data(tb[XFRMA_ALG_COMP]);
len = sizeof (struct xfrmnl_algo) + ((comp->alg_key_len + 7) / 8);
if ((sa->comp = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
memcpy ((void *)sa->comp, (void *)comp, len);
sa->ce_mask |= XFRM_SA_ATTR_ALG_COMP;
}
if (tb[XFRMA_ENCAP]) {
struct xfrm_encap_tmpl* encap = nla_data(tb[XFRMA_ENCAP]);
len = sizeof (struct xfrmnl_encap_tmpl);
if ((sa->encap = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
sa->encap->encap_type = encap->encap_type;
sa->encap->encap_sport = ntohs(encap->encap_sport);
sa->encap->encap_dport = ntohs(encap->encap_dport);
if (!(sa->encap->encap_oa = _nl_addr_build(sa_info->family,
&encap->encap_oa))) {
err = -NLE_NOMEM;
goto errout;
}
sa->ce_mask |= XFRM_SA_ATTR_ENCAP;
}
if (tb[XFRMA_TFCPAD]) {
sa->tfcpad = *(uint32_t*)nla_data(tb[XFRMA_TFCPAD]);
sa->ce_mask |= XFRM_SA_ATTR_TFCPAD;
}
if (tb[XFRMA_COADDR]) {
if (!(sa->coaddr = _nl_addr_build(
sa_info->family, nla_data(tb[XFRMA_COADDR])))) {
err = -NLE_NOMEM;
goto errout;
}
sa->ce_mask |= XFRM_SA_ATTR_COADDR;
}
if (tb[XFRMA_MARK]) {
struct xfrm_mark* m = nla_data(tb[XFRMA_MARK]);
sa->mark.m = m->m;
sa->mark.v = m->v;
sa->ce_mask |= XFRM_SA_ATTR_MARK;
}
if (tb[XFRMA_SEC_CTX]) {
struct xfrm_user_sec_ctx* sec_ctx = nla_data(tb[XFRMA_SEC_CTX]);
len = sizeof (struct xfrmnl_user_sec_ctx) + sec_ctx->ctx_len;
if ((sa->sec_ctx = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
memcpy (sa->sec_ctx, sec_ctx, len);
sa->ce_mask |= XFRM_SA_ATTR_SECCTX;
}
if (tb[XFRMA_ETIMER_THRESH]) {
sa->replay_maxage = *(uint32_t*)nla_data(tb[XFRMA_ETIMER_THRESH]);
sa->ce_mask |= XFRM_SA_ATTR_REPLAY_MAXAGE;
}
if (tb[XFRMA_REPLAY_THRESH]) {
sa->replay_maxdiff = *(uint32_t*)nla_data(tb[XFRMA_REPLAY_THRESH]);