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
|
/* $OpenBSD: pfkey.c,v 1.17 2005/08/02 15:47:25 hshoexer Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2003, 2004 Markus Friedl <markus@openbsd.org>
* Copyright (c) 2004, 2005 Hans-Joerg Hoexer <hshoexer@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip_ipsp.h>
#include <net/pfkeyv2.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "ipsecctl.h"
#include "pfkey.h"
#define ROUNDUP(x) (((x) + (PFKEYV2_CHUNK - 1)) & ~(PFKEYV2_CHUNK - 1))
#define IOV_CNT 20
static int fd;
static u_int32_t sadb_msg_seq = 1;
static int pfkey_flow(int, u_int8_t, u_int8_t, u_int8_t,
struct ipsec_addr *, struct ipsec_addr *,
struct ipsec_addr *, struct ipsec_auth *, u_int8_t);
static int pfkey_sa(int, u_int8_t, u_int8_t, u_int32_t,
struct ipsec_addr *, struct ipsec_addr *,
struct ipsec_key *);
static int pfkey_reply(int);
int pfkey_parse(struct sadb_msg *, struct ipsec_rule *);
int pfkey_ipsec_flush(void);
int pfkey_ipsec_establish(int, struct ipsec_rule *);
int pfkey_init(void);
static int
pfkey_flow(int sd, u_int8_t satype, u_int8_t action, u_int8_t direction,
struct ipsec_addr *src, struct ipsec_addr *dst, struct ipsec_addr *peer,
struct ipsec_auth *auth, u_int8_t flowtype)
{
struct sadb_msg smsg;
struct sadb_address sa_src, sa_dst, sa_peer, sa_smask, sa_dmask;
struct sadb_protocol sa_flowtype, sa_protocol;
struct sadb_ident *sa_srcid, *sa_dstid;
struct sockaddr_storage ssrc, sdst, speer, smask, dmask;
struct iovec iov[IOV_CNT];
ssize_t n;
int iov_cnt, len, ret = 0;
sa_srcid = sa_dstid = NULL;
bzero(&ssrc, sizeof(ssrc));
bzero(&smask, sizeof(smask));
switch (src->af) {
case AF_INET:
((struct sockaddr_in *)&ssrc)->sin_addr = src->v4;
ssrc.ss_len = sizeof(struct sockaddr_in);
ssrc.ss_family = AF_INET;
((struct sockaddr_in *)&smask)->sin_addr = src->v4mask.mask;
break;
case AF_INET6:
default:
warnx("unsupported address family %d", src->af);
return -1;
}
smask.ss_family = ssrc.ss_family;
smask.ss_len = ssrc.ss_len;
bzero(&sdst, sizeof(sdst));
bzero(&dmask, sizeof(dmask));
switch (dst->af) {
case AF_INET:
((struct sockaddr_in *)&sdst)->sin_addr = dst->v4;
sdst.ss_len = sizeof(struct sockaddr_in);
sdst.ss_family = AF_INET;
((struct sockaddr_in *)&dmask)->sin_addr = dst->v4mask.mask;
break;
case AF_INET6:
default:
warnx("unsupported address family %d", dst->af);
return -1;
}
dmask.ss_family = sdst.ss_family;
dmask.ss_len = sdst.ss_len;
bzero(&speer, sizeof(speer));
if (peer) {
switch (peer->af) {
case AF_INET:
((struct sockaddr_in *)&speer)->sin_addr = peer->v4;
speer.ss_len = sizeof(struct sockaddr_in);
speer.ss_family = AF_INET;
break;
case AF_INET6:
default:
warnx("unsupported address family %d", peer->af);
return -1;
}
}
bzero(&smsg, sizeof(smsg));
smsg.sadb_msg_version = PF_KEY_V2;
smsg.sadb_msg_seq = sadb_msg_seq++;
smsg.sadb_msg_pid = getpid();
smsg.sadb_msg_len = sizeof(smsg) / 8;
smsg.sadb_msg_type = action;
smsg.sadb_msg_satype = satype;
bzero(&sa_flowtype, sizeof(sa_flowtype));
sa_flowtype.sadb_protocol_exttype = SADB_X_EXT_FLOW_TYPE;
sa_flowtype.sadb_protocol_len = sizeof(sa_flowtype) / 8;
sa_flowtype.sadb_protocol_direction = direction;
switch (flowtype) {
case TYPE_USE:
sa_flowtype.sadb_protocol_proto = SADB_X_FLOW_TYPE_USE;
break;
case TYPE_REQUIRE:
sa_flowtype.sadb_protocol_proto = SADB_X_FLOW_TYPE_REQUIRE;
break;
default:
warnx("unsupported flowtype %d", flowtype);
return -1;
}
bzero(&sa_protocol, sizeof(sa_protocol));
sa_protocol.sadb_protocol_exttype = SADB_X_EXT_PROTOCOL;
sa_protocol.sadb_protocol_len = sizeof(sa_protocol) / 8;
sa_protocol.sadb_protocol_direction = 0;
sa_protocol.sadb_protocol_proto = IPPROTO_IP;
bzero(&sa_src, sizeof(sa_src));
sa_src.sadb_address_exttype = SADB_X_EXT_SRC_FLOW;
sa_src.sadb_address_len = (sizeof(sa_src) + ROUNDUP(ssrc.ss_len)) / 8;
bzero(&sa_smask, sizeof(sa_smask));
sa_smask.sadb_address_exttype = SADB_X_EXT_SRC_MASK;
sa_smask.sadb_address_len =
(sizeof(sa_smask) + ROUNDUP(smask.ss_len)) / 8;
bzero(&sa_dst, sizeof(sa_dst));
sa_dst.sadb_address_exttype = SADB_X_EXT_DST_FLOW;
sa_dst.sadb_address_len = (sizeof(sa_dst) + ROUNDUP(sdst.ss_len)) / 8;
bzero(&sa_dmask, sizeof(sa_dmask));
sa_dmask.sadb_address_exttype = SADB_X_EXT_DST_MASK;
sa_dmask.sadb_address_len =
(sizeof(sa_dmask) + ROUNDUP(dmask.ss_len)) / 8;
bzero(&sa_peer, sizeof(sa_peer));
sa_peer.sadb_address_exttype = SADB_EXT_ADDRESS_DST;
sa_peer.sadb_address_len =
(sizeof(sa_peer) + ROUNDUP(speer.ss_len)) / 8;
if (auth && auth->srcid) {
len = ROUNDUP(strlen(auth->srcid) + 1) + sizeof(*sa_srcid);
sa_srcid = calloc(len, sizeof(u_int8_t));
if (sa_srcid == NULL)
err(1, "calloc");
sa_srcid->sadb_ident_type = auth->idtype;
sa_srcid->sadb_ident_len = len / 8;
sa_srcid->sadb_ident_exttype = SADB_EXT_IDENTITY_SRC;
strlcpy((char *)(sa_srcid + 1), auth->srcid,
ROUNDUP(strlen(auth->srcid) + 1));
}
if (auth && auth->dstid) {
len = ROUNDUP(strlen(auth->dstid) + 1) + sizeof(*sa_dstid);
sa_dstid = calloc(len, sizeof(u_int8_t));
if (sa_dstid == NULL)
err(1, "calloc");
sa_dstid->sadb_ident_type = auth->idtype;
sa_dstid->sadb_ident_len = len / 8;
sa_dstid->sadb_ident_exttype = SADB_EXT_IDENTITY_DST;
strlcpy((char *)(sa_dstid + 1), auth->dstid,
ROUNDUP(strlen(auth->dstid) + 1));
}
iov_cnt = 0;
/* header */
iov[iov_cnt].iov_base = &smsg;
iov[iov_cnt].iov_len = sizeof(smsg);
iov_cnt++;
/* add flow type */
iov[iov_cnt].iov_base = &sa_flowtype;
iov[iov_cnt].iov_len = sizeof(sa_flowtype);
smsg.sadb_msg_len += sa_flowtype.sadb_protocol_len;
iov_cnt++;
/* remote peer */
if (peer) {
iov[iov_cnt].iov_base = &sa_peer;
iov[iov_cnt].iov_len = sizeof(sa_peer);
iov_cnt++;
iov[iov_cnt].iov_base = &speer;
iov[iov_cnt].iov_len = ROUNDUP(speer.ss_len);
smsg.sadb_msg_len += sa_peer.sadb_address_len;
iov_cnt++;
}
/* src addr */
iov[iov_cnt].iov_base = &sa_src;
iov[iov_cnt].iov_len = sizeof(sa_src);
iov_cnt++;
iov[iov_cnt].iov_base = &ssrc;
iov[iov_cnt].iov_len = ROUNDUP(ssrc.ss_len);
smsg.sadb_msg_len += sa_src.sadb_address_len;
iov_cnt++;
/* src mask */
iov[iov_cnt].iov_base = &sa_smask;
iov[iov_cnt].iov_len = sizeof(sa_smask);
iov_cnt++;
iov[iov_cnt].iov_base = &smask;
iov[iov_cnt].iov_len = ROUNDUP(smask.ss_len);
smsg.sadb_msg_len += sa_smask.sadb_address_len;
iov_cnt++;
/* dest addr */
iov[iov_cnt].iov_base = &sa_dst;
iov[iov_cnt].iov_len = sizeof(sa_dst);
iov_cnt++;
iov[iov_cnt].iov_base = &sdst;
iov[iov_cnt].iov_len = ROUNDUP(sdst.ss_len);
smsg.sadb_msg_len += sa_dst.sadb_address_len;
iov_cnt++;
/* dst mask */
iov[iov_cnt].iov_base = &sa_dmask;
iov[iov_cnt].iov_len = sizeof(sa_dmask);
iov_cnt++;
iov[iov_cnt].iov_base = &dmask;
iov[iov_cnt].iov_len = ROUNDUP(dmask.ss_len);
smsg.sadb_msg_len += sa_dmask.sadb_address_len;
iov_cnt++;
/* add protocol */
iov[iov_cnt].iov_base = &sa_protocol;
iov[iov_cnt].iov_len = sizeof(sa_protocol);
smsg.sadb_msg_len += sa_protocol.sadb_protocol_len;
iov_cnt++;
if (sa_srcid) {
/* src identity */
iov[iov_cnt].iov_base = sa_srcid;
iov[iov_cnt].iov_len = sa_srcid->sadb_ident_len * 8;
smsg.sadb_msg_len += sa_srcid->sadb_ident_len;
iov_cnt++;
}
if (sa_dstid) {
/* dst identity */
iov[iov_cnt].iov_base = sa_dstid;
iov[iov_cnt].iov_len = sa_dstid->sadb_ident_len * 8;
smsg.sadb_msg_len += sa_dstid->sadb_ident_len;
iov_cnt++;
}
len = smsg.sadb_msg_len * 8;
if ((n = writev(sd, iov, iov_cnt)) == -1) {
warn("writev failed");
ret = -1;
goto out;
}
if (n != len) {
warnx("short write");
ret = -1;
}
out:
if (sa_srcid)
free(sa_srcid);
if (sa_dstid)
free(sa_dstid);
return ret;
}
static int
pfkey_sa(int sd, u_int8_t satype, u_int8_t action, u_int32_t spi,
struct ipsec_addr *src, struct ipsec_addr *dst, struct ipsec_key *key)
{
struct sadb_msg smsg;
struct sadb_sa sa;
struct sadb_address sa_src, sa_dst;
struct sadb_key sa_key;
struct sockaddr_storage ssrc, sdst;
struct iovec iov[IOV_CNT];
ssize_t n;
int iov_cnt, len, ret = 0;
bzero(&ssrc, sizeof(ssrc));
switch (src->af) {
case AF_INET:
((struct sockaddr_in *)&ssrc)->sin_addr = src->v4;
ssrc.ss_len = sizeof(struct sockaddr_in);
ssrc.ss_family = AF_INET;
break;
case AF_INET6:
default:
warnx("unsupported address family %d", src->af);
return -1;
}
bzero(&sdst, sizeof(sdst));
switch (dst->af) {
case AF_INET:
((struct sockaddr_in *)&sdst)->sin_addr = dst->v4;
sdst.ss_len = sizeof(struct sockaddr_in);
sdst.ss_family = AF_INET;
break;
case AF_INET6:
default:
warnx("unsupported address family %d", dst->af);
return -1;
}
bzero(&smsg, sizeof(smsg));
smsg.sadb_msg_version = PF_KEY_V2;
smsg.sadb_msg_seq = sadb_msg_seq++;
smsg.sadb_msg_pid = getpid();
smsg.sadb_msg_len = sizeof(smsg) / 8;
smsg.sadb_msg_type = action;
smsg.sadb_msg_satype = satype;
bzero(&sa, sizeof(sa));
sa.sadb_sa_len = sizeof(sa) / 8;
sa.sadb_sa_exttype = SADB_EXT_SA;
sa.sadb_sa_spi = htonl(spi);
sa.sadb_sa_state = SADB_SASTATE_MATURE;
bzero(&sa_src, sizeof(sa_src));
sa_src.sadb_address_len = (sizeof(sa_src) + ROUNDUP(ssrc.ss_len)) / 8;
sa_src.sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
bzero(&sa_dst, sizeof(sa_dst));
sa_dst.sadb_address_len = (sizeof(sa_dst) + ROUNDUP(sdst.ss_len)) / 8;
sa_dst.sadb_address_exttype = SADB_EXT_ADDRESS_DST;
if (action == SADB_ADD) {
if (!key) {
warnx("no key specified");
return -1;
}
bzero(&sa_key, sizeof(sa_key));
sa_key.sadb_key_len = (sizeof(sa_key) + ((key->len + 7) / 8)
* 8) / 8;
sa_key.sadb_key_exttype = SADB_EXT_KEY_AUTH;
sa_key.sadb_key_bits = 8 * key->len;
}
iov_cnt = 0;
/* header */
iov[iov_cnt].iov_base = &smsg;
iov[iov_cnt].iov_len = sizeof(smsg);
iov_cnt++;
/* sa */
iov[iov_cnt].iov_base = &sa;
iov[iov_cnt].iov_len = sizeof(sa);
smsg.sadb_msg_len += sa.sadb_sa_len;
iov_cnt++;
/* src addr */
iov[iov_cnt].iov_base = &sa_src;
iov[iov_cnt].iov_len = sizeof(sa_src);
iov_cnt++;
iov[iov_cnt].iov_base = &ssrc;
iov[iov_cnt].iov_len = ROUNDUP(ssrc.ss_len);
smsg.sadb_msg_len += sa_src.sadb_address_len;
iov_cnt++;
/* dst addr */
iov[iov_cnt].iov_base = &sa_dst;
iov[iov_cnt].iov_len = sizeof(sa_dst);
iov_cnt++;
iov[iov_cnt].iov_base = &sdst;
iov[iov_cnt].iov_len = ROUNDUP(sdst.ss_len);
smsg.sadb_msg_len += sa_dst.sadb_address_len;
iov_cnt++;
if (action == SADB_ADD) {
/* key */
iov[iov_cnt].iov_base = &sa_key;
iov[iov_cnt].iov_len = sizeof(sa_key);
iov_cnt++;
iov[iov_cnt].iov_base = key->data;
iov[iov_cnt].iov_len = ((key->len + 7) / 8) * 8;
smsg.sadb_msg_len += sa_key.sadb_key_len;
iov_cnt++;
}
len = smsg.sadb_msg_len * 8;
if ((n = writev(sd, iov, iov_cnt)) == -1) {
warn("writev failed");
ret = -1;
} else if (n != len) {
warnx("short write");
ret = -1;
}
return ret;
}
static int
pfkey_reply(int sd)
{
struct sadb_msg hdr;
ssize_t len;
u_int8_t *data;
if (recv(sd, &hdr, sizeof(hdr), MSG_PEEK) != sizeof(hdr)) {
warnx("short read");
return -1;
}
if (hdr.sadb_msg_errno != 0) {
errno = hdr.sadb_msg_errno;
warn("PF_KEY failed");
return -1;
}
len = hdr.sadb_msg_len * PFKEYV2_CHUNK;
if ((data = malloc(len)) == NULL)
err(1, NULL);
if (read(sd, data, len) != len) {
warn("PF_KEY short read");
bzero(data, len);
free(data);
return -1;
}
bzero(data, len);
free(data);
return 0;
}
int
pfkey_parse(struct sadb_msg *msg, struct ipsec_rule *rule)
{
struct sadb_ext *ext;
struct sadb_address *saddr;
struct sadb_protocol *sproto;
struct sadb_ident *sident;
struct sockaddr *sa;
int len;
switch (msg->sadb_msg_satype) {
case SADB_SATYPE_ESP:
rule->proto = IPSEC_ESP;
break;
case SADB_SATYPE_AH:
rule->proto = IPSEC_AH;
break;
case SADB_X_SATYPE_IPCOMP:
default:
return (1);
}
for (ext = (struct sadb_ext *)(msg + 1);
(size_t)((u_int8_t *)ext - (u_int8_t *)msg) <
msg->sadb_msg_len * PFKEYV2_CHUNK && ext->sadb_ext_len > 0;
ext = (struct sadb_ext *)((u_int8_t *)ext +
ext->sadb_ext_len * PFKEYV2_CHUNK)) {
switch (ext->sadb_ext_type) {
case SADB_EXT_ADDRESS_SRC:
#ifdef notyet
saddr = (struct sadb_address *)ext;
sa = (struct sockaddr *)(saddr + 1);
rule->local = calloc(1, sizeof(struct ipsec_addr));
if (rule->local == NULL)
err(1, "malloc");
switch (sa->sa_family) {
case AF_INET:
bcopy(&((struct sockaddr_in *)sa)->sin_addr,
&rule->local->v4, sizeof(struct in_addr));
memset(&rule->local->v4mask, 0xff,
sizeof(u_int32_t));
rule->local->af = AF_INET;
break;
default:
return (1);
}
#endif
break;
case SADB_EXT_ADDRESS_DST:
saddr = (struct sadb_address *)ext;
sa = (struct sockaddr *)(saddr + 1);
rule->peer = calloc(1, sizeof(struct ipsec_addr));
if (rule->peer == NULL)
err(1, "malloc");
switch (sa->sa_family) {
case AF_INET:
bcopy(&((struct sockaddr_in *)sa)->sin_addr,
&rule->peer->v4, sizeof(struct in_addr));
memset(&rule->peer->v4mask, 0xff,
sizeof(u_int32_t));
rule->peer->af = AF_INET;
break;
default:
return (1);
}
break;
case SADB_EXT_IDENTITY_SRC:
sident = (struct sadb_ident *)ext;
len = (sident->sadb_ident_len * sizeof(uint64_t)) -
sizeof(struct sadb_ident);
rule->auth->srcid = calloc(1, len);
if (rule->auth->srcid == NULL)
err(1, "calloc");
strlcpy(rule->auth->srcid, (char *)(sident + 1), len);
break;
case SADB_EXT_IDENTITY_DST:
sident = (struct sadb_ident *)ext;
len = (sident->sadb_ident_len * sizeof(uint64_t)) -
sizeof(struct sadb_ident);
rule->auth->dstid = calloc(1, len);
if (rule->auth->dstid == NULL)
err(1, "calloc");
strlcpy(rule->auth->dstid, (char *)(sident + 1), len);
break;
case SADB_X_EXT_PROTOCOL:
/* XXX nothing yet? */
break;
case SADB_X_EXT_FLOW_TYPE:
sproto = (struct sadb_protocol *)ext;
switch (sproto->sadb_protocol_direction) {
case IPSP_DIRECTION_IN:
rule->direction = IPSEC_IN;
break;
case IPSP_DIRECTION_OUT:
rule->direction = IPSEC_OUT;
break;
default:
return (1);
}
switch (sproto->sadb_protocol_proto) {
case SADB_X_FLOW_TYPE_USE:
rule->flowtype = TYPE_USE;
break;
case SADB_X_FLOW_TYPE_ACQUIRE:
rule->flowtype = TYPE_ACQUIRE;
break;
case SADB_X_FLOW_TYPE_REQUIRE:
rule->flowtype = TYPE_REQUIRE;
break;
case SADB_X_FLOW_TYPE_DENY:
rule->flowtype = TYPE_DENY;
break;
case SADB_X_FLOW_TYPE_BYPASS:
rule->flowtype = TYPE_BYPASS;
break;
case SADB_X_FLOW_TYPE_DONTACQ:
rule->flowtype = TYPE_DONTACQ;
break;
default:
rule->flowtype = TYPE_UNKNOWN;
break;
}
break;
case SADB_X_EXT_SRC_FLOW:
saddr = (struct sadb_address *)ext;
sa = (struct sockaddr *)(saddr + 1);
if (rule->src == NULL) {
rule->src = calloc(1,
sizeof(struct ipsec_addr));
if (rule->src == NULL)
err(1, "calloc");
}
switch (sa->sa_family) {
case AF_INET:
bcopy(&((struct sockaddr_in *)sa)->sin_addr,
&rule->src->v4, sizeof(struct in_addr));
rule->src->af = AF_INET;
break;
default:
return (1);
}
break;
case SADB_X_EXT_DST_FLOW:
saddr = (struct sadb_address *)ext;
sa = (struct sockaddr *)(saddr + 1);
if (rule->dst == NULL) {
rule->dst = calloc(1,
sizeof(struct ipsec_addr));
if (rule->dst == NULL)
err(1, "calloc");
}
switch (sa->sa_family) {
case AF_INET:
bcopy(&((struct sockaddr_in *)sa)->sin_addr,
&rule->dst->v4, sizeof(struct in_addr));
rule->dst->af = AF_INET;
break;
default:
return (1);
}
break;
case SADB_X_EXT_SRC_MASK:
saddr = (struct sadb_address *)ext;
sa = (struct sockaddr *)(saddr + 1);
if (rule->src == NULL) {
rule->src = calloc(1,
sizeof(struct ipsec_addr));
if (rule->src == NULL)
err(1, "calloc");
}
switch (sa->sa_family) {
case AF_INET:
bcopy(&((struct sockaddr_in *)sa)->sin_addr,
&rule->src->v4mask.mask,
sizeof(struct in_addr));
rule->src->af = AF_INET;
break;
default:
return (1);
}
break;
case SADB_X_EXT_DST_MASK:
saddr = (struct sadb_address *)ext;
sa = (struct sockaddr *)(saddr + 1);
if (rule->dst == NULL) {
rule->dst = calloc(1,
sizeof(struct ipsec_addr));
if (rule->dst == NULL)
err(1, "calloc");
}
switch (sa->sa_family) {
case AF_INET:
bcopy(&((struct sockaddr_in *)sa)->sin_addr,
&rule->dst->v4mask.mask,
sizeof(struct in_addr));
rule->dst->af = AF_INET;
break;
default:
return (1);
}
break;
default:
return (1);
}
}
return (0);
}
int
pfkey_ipsec_establish(int action, struct ipsec_rule *r)
{
int ret;
u_int8_t satype, direction;
if (r->type == RULE_FLOW) {
switch (r->proto) {
case IPSEC_ESP:
satype = SADB_SATYPE_ESP;
break;
case IPSEC_AH:
satype = SADB_SATYPE_AH;
break;
case IPSEC_COMP:
default:
return -1;
}
switch (r->direction) {
case IPSEC_IN:
direction = IPSP_DIRECTION_IN;
break;
case IPSEC_OUT:
direction = IPSP_DIRECTION_OUT;
break;
default:
return -1;
}
switch (action) {
case PFK_ACTION_ADD:
ret = pfkey_flow(fd, satype, SADB_X_ADDFLOW, direction,
r->src, r->dst, r->peer, r->auth, r->flowtype);
break;
case PFK_ACTION_DELETE:
/* No peer for flow deletion. */
ret = pfkey_flow(fd, satype, SADB_X_DELFLOW, direction,
r->src, r->dst, NULL, NULL, r->flowtype);
break;
default:
return -1;
}
} else if (r->type == RULE_SA) {
satype = SADB_X_SATYPE_TCPSIGNATURE;
switch (action) {
case PFK_ACTION_ADD:
ret = pfkey_sa(fd, satype, SADB_ADD, r->spi,
r->src, r->dst, r->key);
break;
case PFK_ACTION_DELETE:
ret = pfkey_sa(fd, satype, SADB_DELETE, r->spi,
r->src, r->dst, r->key);
break;
default:
return -1;
}
} else
return -1;
if (ret < 0)
return -1;
if (pfkey_reply(fd) < 0)
return -1;
return 0;
}
int
pfkey_ipsec_flush(void)
{
struct sadb_msg smsg;
struct iovec iov[IOV_CNT];
ssize_t n;
int iov_cnt, len;
bzero(&smsg, sizeof(smsg));
smsg.sadb_msg_version = PF_KEY_V2;
smsg.sadb_msg_seq = sadb_msg_seq++;
smsg.sadb_msg_pid = getpid();
smsg.sadb_msg_len = sizeof(smsg) / 8;
smsg.sadb_msg_type = SADB_FLUSH;
smsg.sadb_msg_satype = SADB_SATYPE_UNSPEC;
iov_cnt = 0;
iov[iov_cnt].iov_base = &smsg;
iov[iov_cnt].iov_len = sizeof(smsg);
iov_cnt++;
len = smsg.sadb_msg_len * 8;
if ((n = writev(fd, iov, iov_cnt)) == -1) {
warn("writev failed");
return -1;
}
if (n != len) {
warnx("short write");
return -1;
}
if (pfkey_reply(fd) < 0)
return -1;
return 0;
}
int
pfkey_init(void)
{
if ((fd = socket(PF_KEY, SOCK_RAW, PF_KEY_V2)) == -1)
err(1, "failed to open PF_KEY socket");
return 0;
}
|