aboutsummaryrefslogtreecommitdiffstats
path: root/sys/contrib/pf/net/pf_if.c
blob: 26ce0ee731e67f161f856d1eb32e7ea5a62f0340 (plain) (blame)
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
/*	$OpenBSD: pf_if.c,v 1.23 2004/12/22 17:17:55 dhartmei Exp $ */

/*
 * Copyright (c) 2001 Daniel Hartmeier
 * Copyright (c) 2003 Cedric Berger
 * All rights reserved.
 *
 * 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.
 *
 * 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 HOLDERS 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.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/filio.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/time.h>

#include <net/if.h>
#include <net/if_types.h>

#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>

#include <net/pfvar.h>

#ifdef INET6
#include <netinet/ip6.h>
#endif /* INET6 */

#define ACCEPT_FLAGS(oklist)			\
	do {					\
		if ((flags & ~(oklist)) &	\
		    PFI_FLAG_ALLMASK)		\
			return (EINVAL);	\
	} while (0)

#define senderr(e)      do { rv = (e); goto _bad; } while (0)

struct pfi_kif		**pfi_index2kif;
struct pfi_kif		 *pfi_self;
int			  pfi_indexlim;
struct pfi_ifhead	  pfi_ifs;
struct pfi_statehead	  pfi_statehead;
int			  pfi_ifcnt;
struct pool		  pfi_addr_pl;
long			  pfi_update = 1;
struct pfr_addr		 *pfi_buffer;
int			  pfi_buffer_cnt;
int			  pfi_buffer_max;

void		 pfi_dynaddr_update(void *);
void		 pfi_kifaddr_update(void *);
void		 pfi_table_update(struct pfr_ktable *, struct pfi_kif *,
		    int, int);
void		 pfi_instance_add(struct ifnet *, int, int);
void		 pfi_address_add(struct sockaddr *, int, int);
int		 pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
struct pfi_kif	*pfi_if_create(const char *, struct pfi_kif *, int);
void		 pfi_copy_group(char *, const char *, int);
void		 pfi_newgroup(const char *, int);
int		 pfi_skip_if(const char *, struct pfi_kif *, int);
int		 pfi_unmask(void *);
void		 pfi_dohooks(struct pfi_kif *);

RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);

#define PFI_BUFFER_MAX		0x10000
#define PFI_MTYPE		M_IFADDR

void
pfi_initialize(void)
{
	if (pfi_self != NULL)	/* already initialized */
		return;

	TAILQ_INIT(&pfi_statehead);
	pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0,
	    "pfiaddrpl", &pool_allocator_nointr);
	pfi_buffer_max = 64;
	pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer),
	    PFI_MTYPE, M_WAITOK);
	pfi_self = pfi_if_create("self", NULL, PFI_IFLAG_GROUP);
}

void
pfi_attach_clone(struct if_clone *ifc)
{
	pfi_initialize();
	pfi_newgroup(ifc->ifc_name, PFI_IFLAG_CLONABLE);
}

void
pfi_attach_ifnet(struct ifnet *ifp)
{
	struct pfi_kif	*p, *q, key;
	int		 s;

	pfi_initialize();
	s = splsoftnet();
	pfi_update++;
	if (ifp->if_index >= pfi_indexlim) {
		/*
		 * grow pfi_index2kif,  similar to ifindex2ifnet code in if.c
		 */
		size_t m, n, oldlim;
		struct pfi_kif **mp, **np;

		oldlim = pfi_indexlim;
		if (pfi_indexlim == 0)
			pfi_indexlim = 64;
		while (ifp->if_index >= pfi_indexlim)
			pfi_indexlim <<= 1;

		m = oldlim * sizeof(struct pfi_kif *);
		mp = pfi_index2kif;
		n = pfi_indexlim * sizeof(struct pfi_kif *);
		np = malloc(n, PFI_MTYPE, M_DONTWAIT);
		if (np == NULL)
			panic("pfi_attach_ifnet: "
			    "cannot allocate translation table");
		bzero(np, n);
		if (mp != NULL)
			bcopy(mp, np, m);
		pfi_index2kif = np;
		if (mp != NULL)
			free(mp, PFI_MTYPE);
	}

	strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name));
	p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
	if (p == NULL) {
		/* add group */
		pfi_copy_group(key.pfik_name, ifp->if_xname,
		    sizeof(key.pfik_name));
		q = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
		if (q == NULL)
		    q = pfi_if_create(key.pfik_name, pfi_self, PFI_IFLAG_GROUP);
		if (q == NULL)
			panic("pfi_attach_ifnet: "
			    "cannot allocate '%s' group", key.pfik_name);

		/* add interface */
		p = pfi_if_create(ifp->if_xname, q, PFI_IFLAG_INSTANCE);
		if (p == NULL)
			panic("pfi_attach_ifnet: "
			    "cannot allocate '%s' interface", ifp->if_xname);
	} else
		q = p->pfik_parent;
	p->pfik_ifp = ifp;
	p->pfik_flags |= PFI_IFLAG_ATTACHED;
	p->pfik_ah_cookie =
	    hook_establish(ifp->if_addrhooks, 1, pfi_kifaddr_update, p);
	pfi_index2kif[ifp->if_index] = p;
	pfi_dohooks(p);
	splx(s);
}

void
pfi_detach_ifnet(struct ifnet *ifp)
{
	struct pfi_kif	*p, *q, key;
	int		 s;

	strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name));

	s = splsoftnet();
	pfi_update++;
	p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
	if (p == NULL) {
		printf("pfi_detach_ifnet: cannot find %s", ifp->if_xname);
		splx(s);
		return;
	}
	hook_disestablish(p->pfik_ifp->if_addrhooks, p->pfik_ah_cookie);
	q = p->pfik_parent;
	p->pfik_ifp = NULL;
	p->pfik_flags &= ~PFI_IFLAG_ATTACHED;
	pfi_index2kif[ifp->if_index] = NULL;
	pfi_dohooks(p);
	pfi_maybe_destroy(p);
	splx(s);
}

struct pfi_kif *
pfi_lookup_create(const char *name)
{
	struct pfi_kif	*p, *q, key;
	int		 s;

	s = splsoftnet();
	p = pfi_lookup_if(name);
	if (p == NULL) {
		pfi_copy_group(key.pfik_name, name, sizeof(key.pfik_name));
		q = pfi_lookup_if(key.pfik_name);
		if (q == NULL) {
			pfi_newgroup(key.pfik_name, PFI_IFLAG_DYNAMIC);
			q = pfi_lookup_if(key.pfik_name);
		}
		p = pfi_lookup_if(name);
		if (p == NULL && q != NULL)
			p = pfi_if_create(name, q, PFI_IFLAG_INSTANCE);
	}
	splx(s);
	return (p);
}

struct pfi_kif *
pfi_attach_rule(const char *name)
{
	struct pfi_kif	*p;

	p = pfi_lookup_create(name);
	if (p != NULL)
		p->pfik_rules++;
	return (p);
}

void
pfi_detach_rule(struct pfi_kif *p)
{
	if (p == NULL)
		return;
	if (p->pfik_rules > 0)
		p->pfik_rules--;
	else
		printf("pfi_detach_rule: reference count at 0\n");
	pfi_maybe_destroy(p);
}

void
pfi_attach_state(struct pfi_kif *p)
{
	if (!p->pfik_states++)
		TAILQ_INSERT_TAIL(&pfi_statehead, p, pfik_w_states);
}

void
pfi_detach_state(struct pfi_kif *p)
{
	if (p == NULL)
		return;
	if (p->pfik_states <= 0) {
		printf("pfi_detach_state: reference count <= 0\n");
		return;
	}
	if (!--p->pfik_states)
		TAILQ_REMOVE(&pfi_statehead, p, pfik_w_states);
	pfi_maybe_destroy(p);
}

int
pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
{
	struct pfi_dynaddr	*dyn;
	char			 tblname[PF_TABLE_NAME_SIZE];
	struct pf_ruleset	*ruleset = NULL;
	int			 s, rv = 0;

	if (aw->type != PF_ADDR_DYNIFTL)
		return (0);
	dyn = pool_get(&pfi_addr_pl, PR_NOWAIT);
	if (dyn == NULL)
		return (1);
	bzero(dyn, sizeof(*dyn));

	s = splsoftnet();
	dyn->pfid_kif = pfi_attach_rule(aw->v.ifname);
	if (dyn->pfid_kif == NULL)
		senderr(1);

	dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
	if (af == AF_INET && dyn->pfid_net == 32)
		dyn->pfid_net = 128;
	strlcpy(tblname, aw->v.ifname, sizeof(tblname));
	if (aw->iflags & PFI_AFLAG_NETWORK)
		strlcat(tblname, ":network", sizeof(tblname));
	if (aw->iflags & PFI_AFLAG_BROADCAST)
		strlcat(tblname, ":broadcast", sizeof(tblname));
	if (aw->iflags & PFI_AFLAG_PEER)
		strlcat(tblname, ":peer", sizeof(tblname));
	if (aw->iflags & PFI_AFLAG_NOALIAS)
		strlcat(tblname, ":0", sizeof(tblname));
	if (dyn->pfid_net != 128)
		snprintf(tblname + strlen(tblname),
		    sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
	ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR);
	if (ruleset == NULL)
		senderr(1);

	dyn->pfid_kt = pfr_attach_table(ruleset, tblname);
	if (dyn->pfid_kt == NULL)
		senderr(1);

	dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
	dyn->pfid_iflags = aw->iflags;
	dyn->pfid_af = af;
	dyn->pfid_hook_cookie = hook_establish(dyn->pfid_kif->pfik_ah_head, 1,
	    pfi_dynaddr_update, dyn);
	if (dyn->pfid_hook_cookie == NULL)
		senderr(1);

	aw->p.dyn = dyn;
	pfi_dynaddr_update(aw->p.dyn);
	splx(s);
	return (0);

_bad:
	if (dyn->pfid_kt != NULL)
		pfr_detach_table(dyn->pfid_kt);
	if (ruleset != NULL)
		pf_remove_if_empty_ruleset(ruleset);
	if (dyn->pfid_kif != NULL)
		pfi_detach_rule(dyn->pfid_kif);
	pool_put(&pfi_addr_pl, dyn);
	splx(s);
	return (rv);
}

void
pfi_dynaddr_update(void *p)
{
	struct pfi_dynaddr	*dyn = (struct pfi_dynaddr *)p;
	struct pfi_kif		*kif;
	struct pfr_ktable	*kt;

	if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL)
		panic("pfi_dynaddr_update");

	kif = dyn->pfid_kif;
	kt = dyn->pfid_kt;
	if (kt->pfrkt_larg != pfi_update) {
		/* this table needs to be brought up-to-date */
		pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
		kt->pfrkt_larg = pfi_update;
	}
	pfr_dynaddr_update(kt, dyn);
}

void
pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
{
	int			 e, size2 = 0;
	struct pfi_kif		*p;
	struct pfr_table	 t;

	if ((kif->pfik_flags & PFI_IFLAG_INSTANCE) && kif->pfik_ifp == NULL) {
		pfr_clr_addrs(&kt->pfrkt_t, NULL, 0);
		return;
	}
	pfi_buffer_cnt = 0;
	if ((kif->pfik_flags & PFI_IFLAG_INSTANCE))
		pfi_instance_add(kif->pfik_ifp, net, flags);
	else if (strcmp(kif->pfik_name, "self")) {
		TAILQ_FOREACH(p, &kif->pfik_grouphead, pfik_instances)
			pfi_instance_add(p->pfik_ifp, net, flags);
	} else {
		RB_FOREACH(p, pfi_ifhead, &pfi_ifs)
			if (p->pfik_flags & PFI_IFLAG_INSTANCE)
				pfi_instance_add(p->pfik_ifp, net, flags);
	}
	t = kt->pfrkt_t;
	t.pfrt_flags = 0;
	if ((e = pfr_set_addrs(&t, pfi_buffer, pfi_buffer_cnt, &size2,
	    NULL, NULL, NULL, 0)))
		printf("pfi_table_update: cannot set %d new addresses "
		    "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
}

void
pfi_instance_add(struct ifnet *ifp, int net, int flags)
{
	struct ifaddr	*ia;
	int		 got4 = 0, got6 = 0;
	int		 net2, af;

	if (ifp == NULL)
		return;
	TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) {
		if (ia->ifa_addr == NULL)
			continue;
		af = ia->ifa_addr->sa_family;
		if (af != AF_INET && af != AF_INET6)
			continue;
		if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6)
			continue;
		if ((flags & PFI_AFLAG_BROADCAST) &&
		    !(ifp->if_flags & IFF_BROADCAST))
			continue;
		if ((flags & PFI_AFLAG_PEER) &&
		    !(ifp->if_flags & IFF_POINTOPOINT))
			continue;
		if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
		    IN6_IS_ADDR_LINKLOCAL(
		    &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr))
			continue;
		if (flags & PFI_AFLAG_NOALIAS) {
			if (af == AF_INET && got4)
				continue;
			if (af == AF_INET6 && got6)
				continue;
		}
		if (af == AF_INET)
			got4 = 1;
		else if (af == AF_INET6)
			got6 = 1;
		net2 = net;
		if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
			if (af == AF_INET) {
				net2 = pfi_unmask(&((struct sockaddr_in *)
				    ia->ifa_netmask)->sin_addr);
			} else if (af == AF_INET6) {
				net2 = pfi_unmask(&((struct sockaddr_in6 *)
				    ia->ifa_netmask)->sin6_addr);
			}
		}
		if (af == AF_INET && net2 > 32)
			net2 = 32;
		if (flags & PFI_AFLAG_BROADCAST)
			pfi_address_add(ia->ifa_broadaddr, af, net2);
		else if (flags & PFI_AFLAG_PEER)
			pfi_address_add(ia->ifa_dstaddr, af, net2);
		else
			pfi_address_add(ia->ifa_addr, af, net2);
	}
}

void
pfi_address_add(struct sockaddr *sa, int af, int net)
{
	struct pfr_addr	*p;
	int		 i;

	if (pfi_buffer_cnt >= pfi_buffer_max) {
		int		 new_max = pfi_buffer_max * 2;

		if (new_max > PFI_BUFFER_MAX) {
			printf("pfi_address_add: address buffer full (%d/%d)\n",
			    pfi_buffer_cnt, PFI_BUFFER_MAX);
			return;
		}
		p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE,
		    M_DONTWAIT);
		if (p == NULL) {
			printf("pfi_address_add: no memory to grow buffer "
			    "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
			return;
		}
		memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer));
		/* no need to zero buffer */
		free(pfi_buffer, PFI_MTYPE);
		pfi_buffer = p;
		pfi_buffer_max = new_max;
	}
	if (af == AF_INET && net > 32)
		net = 128;
	p = pfi_buffer + pfi_buffer_cnt++;
	bzero(p, sizeof(*p));
	p->pfra_af = af;
	p->pfra_net = net;
	if (af == AF_INET)
		p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr;
	if (af == AF_INET6) {
		p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
		if (IN6_IS_ADDR_LINKLOCAL(&p->pfra_ip6addr))
			p->pfra_ip6addr.s6_addr16[1] = 0;
	}
	/* mask network address bits */
	if (net < 128)
		((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
	for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++)
		((caddr_t)p)[i] = 0;
}

void
pfi_dynaddr_remove(struct pf_addr_wrap *aw)
{
	int	s;

	if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
	    aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
		return;

	s = splsoftnet();
	hook_disestablish(aw->p.dyn->pfid_kif->pfik_ah_head,
	    aw->p.dyn->pfid_hook_cookie);
	pfi_detach_rule(aw->p.dyn->pfid_kif);
	aw->p.dyn->pfid_kif = NULL;
	pfr_detach_table(aw->p.dyn->pfid_kt);
	aw->p.dyn->pfid_kt = NULL;
	pool_put(&pfi_addr_pl, aw->p.dyn);
	aw->p.dyn = NULL;
	splx(s);
}

void
pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
{
	if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
	    aw->p.dyn->pfid_kif == NULL)
		return;
	aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
}

void
pfi_kifaddr_update(void *v)
{
	int		 s;

	s = splsoftnet();
	pfi_update++;
	pfi_dohooks(v);
	splx(s);
}

int
pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
{
	return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
}

struct pfi_kif *
pfi_if_create(const char *name, struct pfi_kif *q, int flags)
{
	struct pfi_kif *p;

	p = malloc(sizeof(*p), PFI_MTYPE, M_DONTWAIT);
	if (p == NULL)
		return (NULL);
	bzero(p, sizeof(*p));
	p->pfik_ah_head = malloc(sizeof(*p->pfik_ah_head), PFI_MTYPE,
	    M_DONTWAIT);
	if (p->pfik_ah_head == NULL) {
		free(p, PFI_MTYPE);
		return (NULL);
	}
	bzero(p->pfik_ah_head, sizeof(*p->pfik_ah_head));
	TAILQ_INIT(p->pfik_ah_head);
	TAILQ_INIT(&p->pfik_grouphead);
	strlcpy(p->pfik_name, name, sizeof(p->pfik_name));
	RB_INIT(&p->pfik_lan_ext);
	RB_INIT(&p->pfik_ext_gwy);
	p->pfik_flags = flags;
	p->pfik_parent = q;
	p->pfik_tzero = time_second;

	RB_INSERT(pfi_ifhead, &pfi_ifs, p);
	if (q != NULL) {
		q->pfik_addcnt++;
		TAILQ_INSERT_TAIL(&q->pfik_grouphead, p, pfik_instances);
	}
	pfi_ifcnt++;
	return (p);
}

int
pfi_maybe_destroy(struct pfi_kif *p)
{
	int		 i, j, k, s;
	struct pfi_kif	*q = p->pfik_parent;

	if ((p->pfik_flags & (PFI_IFLAG_ATTACHED | PFI_IFLAG_GROUP)) ||
	    p->pfik_rules > 0 || p->pfik_states > 0)
		return (0);

	s = splsoftnet();
	if (q != NULL) {
		for (i = 0; i < 2; i++)
			for (j = 0; j < 2; j++)
				for (k = 0; k < 2; k++) {
					q->pfik_bytes[i][j][k] +=
					    p->pfik_bytes[i][j][k];
					q->pfik_packets[i][j][k] +=
					    p->pfik_packets[i][j][k];
				}
		q->pfik_delcnt++;
		TAILQ_REMOVE(&q->pfik_grouphead, p, pfik_instances);
	}
	pfi_ifcnt--;
	RB_REMOVE(pfi_ifhead, &pfi_ifs, p);
	splx(s);

	free(p->pfik_ah_head, PFI_MTYPE);
	free(p, PFI_MTYPE);
	return (1);
}

void
pfi_copy_group(char *p, const char *q, int m)
{
	while (m > 1 && *q && !(*q >= '0' && *q <= '9')) {
		*p++ = *q++;
		m--;
	}
	if (m > 0)
		*p++ = '\0';
}

void
pfi_newgroup(const char *name, int flags)
{
	struct pfi_kif	*p;

	p = pfi_lookup_if(name);
	if (p == NULL)
		p = pfi_if_create(name, pfi_self, PFI_IFLAG_GROUP);
	if (p == NULL) {
		printf("pfi_newgroup: cannot allocate '%s' group", name);
		return;
	}
	p->pfik_flags |= flags;
}

void
pfi_fill_oldstatus(struct pf_status *pfs)
{
	struct pfi_kif	*p, key;
	int		 i, j, k, s;

	strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name));
	s = splsoftnet();
	p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
	if (p == NULL) {
		splx(s);
		return;
	}
	bzero(pfs->pcounters, sizeof(pfs->pcounters));
	bzero(pfs->bcounters, sizeof(pfs->bcounters));
	for (i = 0; i < 2; i++)
		for (j = 0; j < 2; j++)
			for (k = 0; k < 2; k++) {
				pfs->pcounters[i][j][k] =
					p->pfik_packets[i][j][k];
				pfs->bcounters[i][j] +=
					p->pfik_bytes[i][j][k];
			}
	splx(s);
}

int
pfi_clr_istats(const char *name, int *nzero, int flags)
{
	struct pfi_kif	*p;
	int		 n = 0, s;
	long		 tzero = time_second;

	ACCEPT_FLAGS(PFI_FLAG_GROUP|PFI_FLAG_INSTANCE);
	s = splsoftnet();
	RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
		if (pfi_skip_if(name, p, flags))
			continue;
		bzero(p->pfik_packets, sizeof(p->pfik_packets));
		bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
		p->pfik_tzero = tzero;
		n++;
	}
	splx(s);
	if (nzero != NULL)
		*nzero = n;
	return (0);
}

int
pfi_set_flags(const char *name, int flags)
{
	struct pfi_kif	*p;
	int		 s;

	if (flags & ~PFI_IFLAG_SETABLE_MASK)
		return (EINVAL);

	s = splsoftnet();
	RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
		if (pfi_skip_if(name, p, PFI_FLAG_GROUP|PFI_FLAG_INSTANCE))
			continue;
		p->pfik_flags |= flags;
	}
	splx(s);
	return (0);
}

int
pfi_clear_flags(const char *name, int flags)
{
	struct pfi_kif	*p;
	int		 s;

	if (flags & ~PFI_IFLAG_SETABLE_MASK)
		return (EINVAL);

	s = splsoftnet();
	RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
		if (pfi_skip_if(name, p, PFI_FLAG_GROUP|PFI_FLAG_INSTANCE))
			continue;
		p->pfik_flags &= ~flags;
	}
	splx(s);
	return (0);
}

int
pfi_get_ifaces(const char *name, struct pfi_if *buf, int *size, int flags)
{
	struct pfi_kif	*p;
	int		 s, n = 0;

	ACCEPT_FLAGS(PFI_FLAG_GROUP|PFI_FLAG_INSTANCE);
	s = splsoftnet();
	RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
		if (pfi_skip_if(name, p, flags))
			continue;
		if (*size > n++) {
			if (!p->pfik_tzero)
				p->pfik_tzero = time_second;
			if (copyout(p, buf++, sizeof(*buf))) {
				splx(s);
				return (EFAULT);
			}
		}
	}
	splx(s);
	*size = n;
	return (0);
}

struct pfi_kif *
pfi_lookup_if(const char *name)
{
	struct pfi_kif	*p, key;

	strlcpy(key.pfik_name, name, sizeof(key.pfik_name));
	p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
	return (p);
}

int
pfi_skip_if(const char *filter, struct pfi_kif *p, int f)
{
	int	n;

	if ((p->pfik_flags & PFI_IFLAG_GROUP) && !(f & PFI_FLAG_GROUP))
		return (1);
	if ((p->pfik_flags & PFI_IFLAG_INSTANCE) && !(f & PFI_FLAG_INSTANCE))
		return (1);
	if (filter == NULL || !*filter)
		return (0);
	if (!strcmp(p->pfik_name, filter))
		return (0);	/* exact match */
	n = strlen(filter);
	if (n < 1 || n >= IFNAMSIZ)
		return (1);	/* sanity check */
	if (filter[n-1] >= '0' && filter[n-1] <= '9')
		return (1);	/* only do exact match in that case */
	if (strncmp(p->pfik_name, filter, n))
		return (1);	/* prefix doesn't match */
	return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
}

/* from pf_print_state.c */
int
pfi_unmask(void *addr)
{
	struct pf_addr *m = addr;
	int i = 31, j = 0, b = 0;
	u_int32_t tmp;

	while (j < 4 && m->addr32[j] == 0xffffffff) {
		b += 32;
		j++;
	}
	if (j < 4) {
		tmp = ntohl(m->addr32[j]);
		for (i = 31; tmp & (1 << i); --i)
			b++;
	}
	return (b);
}

void
pfi_dohooks(struct pfi_kif *p)
{
	for (; p != NULL; p = p->pfik_parent)
		dohooks(p->pfik_ah_head, 0);
}

int
pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
{
	switch (af) {
#ifdef INET
	case AF_INET:
		switch (dyn->pfid_acnt4) {
		case 0:
			return (0);
		case 1:
			return (PF_MATCHA(0, &dyn->pfid_addr4,
			    &dyn->pfid_mask4, a, AF_INET));
		default:
			return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
		}
		break;
#endif /* INET */
#ifdef INET6
	case AF_INET6:
		switch (dyn->pfid_acnt6) {
		case 0:
			return (0);
		case 1:
			return (PF_MATCHA(0, &dyn->pfid_addr6,
			    &dyn->pfid_mask6, a, AF_INET6));
		default:
			return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
		}
		break;
#endif /* INET6 */
	default:
		return (0);
	}
}