1/*
2 * Copyright (c) 2007-2016 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29/* $apfw: pf_if.c,v 1.4 2008/08/27 00:01:32 jhw Exp $ */
30/* $OpenBSD: pf_if.c,v 1.46 2006/12/13 09:01:59 itojun Exp $ */
31
32/*
33 * Copyright 2005 Henning Brauer <henning@openbsd.org>
34 * Copyright 2005 Ryan McBride <mcbride@openbsd.org>
35 * Copyright (c) 2001 Daniel Hartmeier
36 * Copyright (c) 2003 Cedric Berger
37 * All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 *
43 * - Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * - Redistributions in binary form must reproduce the above
46 * copyright notice, this list of conditions and the following
47 * disclaimer in the documentation and/or other materials provided
48 * with the distribution.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
53 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
54 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
55 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
56 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
57 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
58 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
60 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
61 * POSSIBILITY OF SUCH DAMAGE.
62 */
63
64#include <sys/param.h>
65#include <sys/systm.h>
66#include <sys/mbuf.h>
67#include <sys/filio.h>
68#include <sys/socket.h>
69#include <sys/socketvar.h>
70#include <sys/kernel.h>
71#include <sys/time.h>
72#include <sys/malloc.h>
73
74#include <net/if.h>
75#include <net/if_types.h>
76#include <net/if_var.h>
77
78#include <netinet/in.h>
79#include <netinet/in_var.h>
80#include <netinet/in_systm.h>
81#include <netinet/ip.h>
82#include <netinet/ip_var.h>
83
84#if INET6
85#include <netinet/ip6.h>
86#endif /* INET6 */
87
88#include <net/pfvar.h>
89
90struct pfi_kif *pfi_all = NULL;
91
92static struct pool pfi_addr_pl;
93static struct pfi_ifhead pfi_ifs;
94static u_int32_t pfi_update = 1;
95static struct pfr_addr *pfi_buffer;
96static int pfi_buffer_cnt;
97static int pfi_buffer_max;
98
99__private_extern__ void pfi_kifaddr_update(void *);
100
101static void pfi_kif_update(struct pfi_kif *);
102static void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
103static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int, int);
104static void pfi_instance_add(struct ifnet *, int, int);
105static void pfi_address_add(struct sockaddr *, int, int);
106static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
107static int pfi_skip_if(const char *, struct pfi_kif *);
108static int pfi_unmask(void *);
109
110RB_PROTOTYPE_SC(static, pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
111RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
112
113#define PFI_BUFFER_MAX 0x10000
114#define PFI_MTYPE M_IFADDR
115
116#define IFG_ALL "ALL"
117
118void
119pfi_initialize(void)
120{
121 if (pfi_all != NULL) /* already initialized */
122 return;
123
124 pool_init(&pfi_addr_pl, sizeof (struct pfi_dynaddr), 0, 0, 0,
125 "pfiaddrpl", NULL);
126 pfi_buffer_max = 64;
127 pfi_buffer = _MALLOC(pfi_buffer_max * sizeof (*pfi_buffer),
128 PFI_MTYPE, M_WAITOK);
129
130 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL)
131 panic("pfi_kif_get for pfi_all failed");
132}
133
134#if 0
135void
136pfi_destroy(void)
137{
138 pool_destroy(&pfi_addr_pl);
139 _FREE(pfi_buffer, PFI_MTYPE);
140}
141#endif
142
143struct pfi_kif *
144pfi_kif_get(const char *kif_name)
145{
146 struct pfi_kif *kif;
147 struct pfi_kif_cmp s;
148
149 bzero(&s, sizeof (s));
150 strlcpy(s.pfik_name, kif_name, sizeof (s.pfik_name));
151 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs,
152 (struct pfi_kif *)(void *)&s)) != NULL)
153 return (kif);
154
155 /* create new one */
156 if ((kif = _MALLOC(sizeof (*kif), PFI_MTYPE, M_WAITOK|M_ZERO)) == NULL)
157 return (NULL);
158
159 strlcpy(kif->pfik_name, kif_name, sizeof (kif->pfik_name));
160 kif->pfik_tzero = pf_calendar_time_second();
161 TAILQ_INIT(&kif->pfik_dynaddrs);
162
163 RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
164 return (kif);
165}
166
167void
168pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
169{
170 switch (what) {
171 case PFI_KIF_REF_RULE:
172 kif->pfik_rules++;
173 break;
174 case PFI_KIF_REF_STATE:
175 kif->pfik_states++;
176 break;
177 default:
178 panic("pfi_kif_ref with unknown type");
179 }
180}
181
182void
183pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
184{
185 if (kif == NULL)
186 return;
187
188 switch (what) {
189 case PFI_KIF_REF_NONE:
190 break;
191 case PFI_KIF_REF_RULE:
192 if (kif->pfik_rules <= 0) {
193 printf("pfi_kif_unref: rules refcount <= 0\n");
194 return;
195 }
196 kif->pfik_rules--;
197 break;
198 case PFI_KIF_REF_STATE:
199 if (kif->pfik_states <= 0) {
200 printf("pfi_kif_unref: state refcount <= 0\n");
201 return;
202 }
203 kif->pfik_states--;
204 break;
205 default:
206 panic("pfi_kif_unref with unknown type");
207 }
208
209 if (kif->pfik_ifp != NULL || kif == pfi_all)
210 return;
211
212 if (kif->pfik_rules || kif->pfik_states)
213 return;
214
215 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
216 _FREE(kif, PFI_MTYPE);
217}
218
219int
220pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
221{
222
223 if (rule_kif == NULL || rule_kif == packet_kif)
224 return (1);
225
226 return (0);
227}
228
229void
230pfi_attach_ifnet(struct ifnet *ifp)
231{
232 struct pfi_kif *kif;
233
234 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
235
236 pfi_update++;
237 if ((kif = pfi_kif_get(if_name(ifp))) == NULL)
238 panic("pfi_kif_get failed");
239
240 ifnet_lock_exclusive(ifp);
241 kif->pfik_ifp = ifp;
242 ifp->if_pf_kif = kif;
243 ifnet_lock_done(ifp);
244
245 pfi_kif_update(kif);
246}
247
248/*
249 * Caller holds ifnet lock as writer (exclusive);
250 */
251void
252pfi_detach_ifnet(struct ifnet *ifp)
253{
254 struct pfi_kif *kif;
255
256 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
257
258 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL)
259 return;
260
261 pfi_update++;
262 pfi_kif_update(kif);
263
264 ifnet_lock_exclusive(ifp);
265 kif->pfik_ifp = NULL;
266 ifp->if_pf_kif = NULL;
267 ifnet_lock_done(ifp);
268
269 pfi_kif_unref(kif, PFI_KIF_REF_NONE);
270}
271
272int
273pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
274{
275 switch (af) {
276#if INET
277 case AF_INET:
278 switch (dyn->pfid_acnt4) {
279 case 0:
280 return (0);
281 case 1:
282 return (PF_MATCHA(0, &dyn->pfid_addr4,
283 &dyn->pfid_mask4, a, AF_INET));
284 default:
285 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
286 }
287#endif /* INET */
288#if INET6
289 case AF_INET6:
290 switch (dyn->pfid_acnt6) {
291 case 0:
292 return (0);
293 case 1:
294 return (PF_MATCHA(0, &dyn->pfid_addr6,
295 &dyn->pfid_mask6, a, AF_INET6));
296 default:
297 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
298 }
299#endif /* INET6 */
300 default:
301 return (0);
302 }
303}
304
305int
306pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
307{
308 struct pfi_dynaddr *dyn;
309 char tblname[PF_TABLE_NAME_SIZE];
310 struct pf_ruleset *ruleset = NULL;
311 int rv = 0;
312
313 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
314
315 if (aw->type != PF_ADDR_DYNIFTL)
316 return (0);
317 if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK)) == NULL)
318 return (1);
319 bzero(dyn, sizeof (*dyn));
320
321 if (strcmp(aw->v.ifname, "self") == 0)
322 dyn->pfid_kif = pfi_kif_get(IFG_ALL);
323 else
324 dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
325 if (dyn->pfid_kif == NULL) {
326 rv = 1;
327 goto _bad;
328 }
329 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
330
331 dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
332 if (af == AF_INET && dyn->pfid_net == 32)
333 dyn->pfid_net = 128;
334 strlcpy(tblname, aw->v.ifname, sizeof (tblname));
335 if (aw->iflags & PFI_AFLAG_NETWORK)
336 strlcat(tblname, ":network", sizeof (tblname));
337 if (aw->iflags & PFI_AFLAG_BROADCAST)
338 strlcat(tblname, ":broadcast", sizeof (tblname));
339 if (aw->iflags & PFI_AFLAG_PEER)
340 strlcat(tblname, ":peer", sizeof (tblname));
341 if (aw->iflags & PFI_AFLAG_NOALIAS)
342 strlcat(tblname, ":0", sizeof (tblname));
343 if (dyn->pfid_net != 128)
344 snprintf(tblname + strlen(tblname),
345 sizeof (tblname) - strlen(tblname), "/%d", dyn->pfid_net);
346 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
347 rv = 1;
348 goto _bad;
349 }
350
351 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
352 rv = 1;
353 goto _bad;
354 }
355
356 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
357 dyn->pfid_iflags = aw->iflags;
358 dyn->pfid_af = af;
359
360 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
361 aw->p.dyn = dyn;
362 pfi_kif_update(dyn->pfid_kif);
363 return (0);
364
365_bad:
366 if (dyn->pfid_kt != NULL)
367 pfr_detach_table(dyn->pfid_kt);
368 if (ruleset != NULL)
369 pf_remove_if_empty_ruleset(ruleset);
370 if (dyn->pfid_kif != NULL)
371 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
372 pool_put(&pfi_addr_pl, dyn);
373 return (rv);
374}
375
376void
377pfi_kif_update(struct pfi_kif *kif)
378{
379 struct pfi_dynaddr *p;
380
381 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
382
383 /* update all dynaddr */
384 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
385 pfi_dynaddr_update(p);
386}
387
388void
389pfi_dynaddr_update(struct pfi_dynaddr *dyn)
390{
391 struct pfi_kif *kif;
392 struct pfr_ktable *kt;
393
394 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL)
395 panic("pfi_dynaddr_update");
396
397 kif = dyn->pfid_kif;
398 kt = dyn->pfid_kt;
399
400 if (kt->pfrkt_larg != pfi_update) {
401 /* this table needs to be brought up-to-date */
402 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
403 kt->pfrkt_larg = pfi_update;
404 }
405 pfr_dynaddr_update(kt, dyn);
406}
407
408void
409pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
410{
411 int e, size2 = 0;
412
413 pfi_buffer_cnt = 0;
414
415 if (kif->pfik_ifp != NULL)
416 pfi_instance_add(kif->pfik_ifp, net, flags);
417
418 if ((e = pfr_set_addrs(&kt->pfrkt_t, CAST_USER_ADDR_T(pfi_buffer),
419 pfi_buffer_cnt, &size2, NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
420 printf("pfi_table_update: cannot set %d new addresses "
421 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
422}
423
424void
425pfi_instance_add(struct ifnet *ifp, int net, int flags)
426{
427 struct ifaddr *ia;
428 int got4 = 0, got6 = 0;
429 int net2, af;
430
431 if (ifp == NULL)
432 return;
433 ifnet_lock_shared(ifp);
434 TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) {
435 IFA_LOCK(ia);
436 if (ia->ifa_addr == NULL) {
437 IFA_UNLOCK(ia);
438 continue;
439 }
440 af = ia->ifa_addr->sa_family;
441 if (af != AF_INET && af != AF_INET6) {
442 IFA_UNLOCK(ia);
443 continue;
444 }
445 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) {
446 IFA_UNLOCK(ia);
447 continue;
448 }
449 if ((flags & PFI_AFLAG_BROADCAST) &&
450 !(ifp->if_flags & IFF_BROADCAST)) {
451 IFA_UNLOCK(ia);
452 continue;
453 }
454 if ((flags & PFI_AFLAG_PEER) &&
455 !(ifp->if_flags & IFF_POINTOPOINT)) {
456 IFA_UNLOCK(ia);
457 continue;
458 }
459 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
460 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
461 (void *)ia->ifa_addr)->sin6_addr)) {
462 IFA_UNLOCK(ia);
463 continue;
464 }
465 if (flags & PFI_AFLAG_NOALIAS) {
466 if (af == AF_INET && got4) {
467 IFA_UNLOCK(ia);
468 continue;
469 }
470 if (af == AF_INET6 && got6) {
471 IFA_UNLOCK(ia);
472 continue;
473 }
474 }
475 if (af == AF_INET)
476 got4 = 1;
477 else if (af == AF_INET6)
478 got6 = 1;
479 net2 = net;
480 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
481 if (af == AF_INET)
482 net2 = pfi_unmask(&((struct sockaddr_in *)
483 (void *)ia->ifa_netmask)->sin_addr);
484 else if (af == AF_INET6)
485 net2 = pfi_unmask(&((struct sockaddr_in6 *)
486 (void *)ia->ifa_netmask)->sin6_addr);
487 }
488 if (af == AF_INET && net2 > 32)
489 net2 = 32;
490 if (flags & PFI_AFLAG_BROADCAST)
491 pfi_address_add(ia->ifa_broadaddr, af, net2);
492 else if (flags & PFI_AFLAG_PEER)
493 pfi_address_add(ia->ifa_dstaddr, af, net2);
494 else
495 pfi_address_add(ia->ifa_addr, af, net2);
496 IFA_UNLOCK(ia);
497 }
498 ifnet_lock_done(ifp);
499}
500
501void
502pfi_address_add(struct sockaddr *sa, int af, int net)
503{
504 struct pfr_addr *p;
505 int i;
506
507 if (pfi_buffer_cnt >= pfi_buffer_max) {
508 int new_max = pfi_buffer_max * 2;
509
510 if (new_max > PFI_BUFFER_MAX) {
511 printf("pfi_address_add: address buffer full (%d/%d)\n",
512 pfi_buffer_cnt, PFI_BUFFER_MAX);
513 return;
514 }
515 p = _MALLOC(new_max * sizeof (*pfi_buffer), PFI_MTYPE,
516 M_WAITOK);
517 if (p == NULL) {
518 printf("pfi_address_add: no memory to grow buffer "
519 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
520 return;
521 }
522 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof (*pfi_buffer));
523 /* no need to zero buffer */
524 _FREE(pfi_buffer, PFI_MTYPE);
525 pfi_buffer = p;
526 pfi_buffer_max = new_max;
527 }
528 if (af == AF_INET && net > 32)
529 net = 128;
530 p = pfi_buffer + pfi_buffer_cnt++;
531 bzero(p, sizeof (*p));
532 p->pfra_af = af;
533 p->pfra_net = net;
534 if (af == AF_INET)
535 p->pfra_ip4addr = ((struct sockaddr_in *)(void *)sa)->sin_addr;
536 else if (af == AF_INET6) {
537 p->pfra_ip6addr =
538 ((struct sockaddr_in6 *)(void *)sa)->sin6_addr;
539 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr))
540 p->pfra_ip6addr.s6_addr16[1] = 0;
541 }
542 /* mask network address bits */
543 if (net < 128)
544 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
545 for (i = (p->pfra_net+7)/8; i < (int)sizeof (p->pfra_u); i++)
546 ((caddr_t)p)[i] = 0;
547}
548
549void
550pfi_dynaddr_remove(struct pf_addr_wrap *aw)
551{
552 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
553 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
554 return;
555
556 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
557 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
558 aw->p.dyn->pfid_kif = NULL;
559 pfr_detach_table(aw->p.dyn->pfid_kt);
560 aw->p.dyn->pfid_kt = NULL;
561 pool_put(&pfi_addr_pl, aw->p.dyn);
562 aw->p.dyn = NULL;
563}
564
565void
566pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
567{
568 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
569 aw->p.dyn->pfid_kif == NULL)
570 return;
571 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
572}
573
574void
575pfi_kifaddr_update(void *v)
576{
577 struct pfi_kif *kif = (struct pfi_kif *)v;
578
579 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
580
581 pfi_update++;
582 pfi_kif_update(kif);
583}
584
585int
586pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
587{
588 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
589}
590
591void
592pfi_update_status(const char *name, struct pf_status *pfs)
593{
594 struct pfi_kif *p;
595 struct pfi_kif_cmp key;
596 int i, j, k;
597
598 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
599
600 strlcpy(key.pfik_name, name, sizeof (key.pfik_name));
601 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)(void *)&key);
602 if (p == NULL)
603 return;
604
605 if (pfs != NULL) {
606 bzero(pfs->pcounters, sizeof (pfs->pcounters));
607 bzero(pfs->bcounters, sizeof (pfs->bcounters));
608 for (i = 0; i < 2; i++)
609 for (j = 0; j < 2; j++)
610 for (k = 0; k < 2; k++) {
611 pfs->pcounters[i][j][k] +=
612 p->pfik_packets[i][j][k];
613 pfs->bcounters[i][j] +=
614 p->pfik_bytes[i][j][k];
615 }
616 } else {
617 /* just clear statistics */
618 bzero(p->pfik_packets, sizeof (p->pfik_packets));
619 bzero(p->pfik_bytes, sizeof (p->pfik_bytes));
620 p->pfik_tzero = pf_calendar_time_second();
621 }
622}
623
624int
625pfi_get_ifaces(const char *name, user_addr_t buf, int *size)
626{
627 struct pfi_kif *p, *nextp;
628 int n = 0;
629
630 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
631
632 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
633 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
634 if (pfi_skip_if(name, p))
635 continue;
636 if (*size > n++) {
637 struct pfi_uif u;
638
639 if (!p->pfik_tzero)
640 p->pfik_tzero = pf_calendar_time_second();
641 pfi_kif_ref(p, PFI_KIF_REF_RULE);
642
643 /* return the user space version of pfi_kif */
644 bzero(&u, sizeof (u));
645 bcopy(p->pfik_name, &u.pfik_name, sizeof (u.pfik_name));
646 bcopy(p->pfik_packets, &u.pfik_packets,
647 sizeof (u.pfik_packets));
648 bcopy(p->pfik_bytes, &u.pfik_bytes,
649 sizeof (u.pfik_bytes));
650 u.pfik_tzero = p->pfik_tzero;
651 u.pfik_flags = p->pfik_flags;
652 u.pfik_states = p->pfik_states;
653 u.pfik_rules = p->pfik_rules;
654
655 if (copyout(&u, buf, sizeof (u))) {
656 pfi_kif_unref(p, PFI_KIF_REF_RULE);
657 return (EFAULT);
658 }
659 buf += sizeof (u);
660 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
661 pfi_kif_unref(p, PFI_KIF_REF_RULE);
662 }
663 }
664 *size = n;
665 return (0);
666}
667
668int
669pfi_skip_if(const char *filter, struct pfi_kif *p)
670{
671 int n;
672
673 if (filter == NULL || !*filter)
674 return (0);
675 if (strcmp(p->pfik_name, filter) == 0)
676 return (0); /* exact match */
677 n = strlen(filter);
678 if (n < 1 || n >= IFNAMSIZ)
679 return (1); /* sanity check */
680 if (filter[n-1] >= '0' && filter[n-1] <= '9')
681 return (1); /* only do exact match in that case */
682 if (strncmp(p->pfik_name, filter, n))
683 return (1); /* prefix doesn't match */
684 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
685}
686
687int
688pfi_set_flags(const char *name, int flags)
689{
690 struct pfi_kif *p;
691
692 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
693
694 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
695 if (pfi_skip_if(name, p))
696 continue;
697 p->pfik_flags |= flags;
698 }
699 return (0);
700}
701
702int
703pfi_clear_flags(const char *name, int flags)
704{
705 struct pfi_kif *p;
706
707 LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
708
709 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
710 if (pfi_skip_if(name, p))
711 continue;
712 p->pfik_flags &= ~flags;
713 }
714 return (0);
715}
716
717/* from pf_print_state.c */
718int
719pfi_unmask(void *addr)
720{
721 struct pf_addr *m = addr;
722 int i = 31, j = 0, b = 0;
723 u_int32_t tmp;
724
725 while (j < 4 && m->addr32[j] == 0xffffffff) {
726 b += 32;
727 j++;
728 }
729 if (j < 4) {
730 tmp = ntohl(m->addr32[j]);
731 for (i = 31; tmp & (1 << i); --i)
732 b++;
733 }
734 return (b);
735}
736