1 /*-
2 * Copyright (c) 2001 Daniel Hartmeier
3 * Copyright (c) 2003 Cedric Berger
4 * Copyright (c) 2005 Henning Brauer <henning@openbsd.org>
5 * Copyright (c) 2005 Ryan McBride <mcbride@openbsd.org>
6 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * - Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * - Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials provided
18 * with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 * $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk Exp $
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
39 #include "opt_inet.h"
40 #include "opt_inet6.h"
41
42 #include <sys/param.h>
43 #include <sys/kernel.h>
44 #include <sys/eventhandler.h>
45 #include <sys/lock.h>
46 #include <sys/mbuf.h>
47 #include <sys/rwlock.h>
48 #include <sys/socket.h>
49
50 #include <net/if.h>
51 #include <net/if_var.h>
52 #include <net/vnet.h>
53 #include <net/pfvar.h>
54 #include <net/route.h>
55
56 VNET_DEFINE(struct pfi_kif *, pfi_all);
57 static VNET_DEFINE(long, pfi_update);
58 #define V_pfi_update VNET(pfi_update)
59 #define PFI_BUFFER_MAX 0x10000
60
61 static VNET_DEFINE(struct pfr_addr *, pfi_buffer);
62 static VNET_DEFINE(int, pfi_buffer_cnt);
63 static VNET_DEFINE(int, pfi_buffer_max);
64 #define V_pfi_buffer VNET(pfi_buffer)
65 #define V_pfi_buffer_cnt VNET(pfi_buffer_cnt)
66 #define V_pfi_buffer_max VNET(pfi_buffer_max)
67
68 eventhandler_tag pfi_attach_cookie;
69 eventhandler_tag pfi_detach_cookie;
70 eventhandler_tag pfi_attach_group_cookie;
71 eventhandler_tag pfi_change_group_cookie;
72 eventhandler_tag pfi_detach_group_cookie;
73 eventhandler_tag pfi_ifaddr_event_cookie;
74
75 static void pfi_attach_ifnet(struct ifnet *);
76 static void pfi_attach_ifgroup(struct ifg_group *);
77
78 static void pfi_kif_update(struct pfi_kif *);
79 static void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
80 static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int,
81 int);
82 static void pfi_instance_add(struct ifnet *, int, int);
83 static void pfi_address_add(struct sockaddr *, int, int);
84 static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
85 static int pfi_skip_if(const char *, struct pfi_kif *);
86 static int pfi_unmask(void *);
87 static void pfi_attach_ifnet_event(void * __unused, struct ifnet *);
88 static void pfi_detach_ifnet_event(void * __unused, struct ifnet *);
89 static void pfi_attach_group_event(void *, struct ifg_group *);
90 static void pfi_change_group_event(void *, char *);
91 static void pfi_detach_group_event(void *, struct ifg_group *);
92 static void pfi_ifaddr_event(void * __unused, struct ifnet *);
93
94 RB_HEAD(pfi_ifhead, pfi_kif);
95 static RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
96 static RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
97 static VNET_DEFINE(struct pfi_ifhead, pfi_ifs);
98 #define V_pfi_ifs VNET(pfi_ifs)
99
100 #define PFI_BUFFER_MAX 0x10000
101 MALLOC_DEFINE(PFI_MTYPE, "pf_ifnet", "pf(4) interface database");
102
103 LIST_HEAD(pfi_list, pfi_kif);
104 static VNET_DEFINE(struct pfi_list, pfi_unlinked_kifs);
105 #define V_pfi_unlinked_kifs VNET(pfi_unlinked_kifs)
106 static struct mtx pfi_unlnkdkifs_mtx;
107 MTX_SYSINIT(pfi_unlnkdkifs_mtx, &pfi_unlnkdkifs_mtx, "pf unlinked interfaces",
108 MTX_DEF);
109
110 void
pfi_initialize(void)111 pfi_initialize(void)
112 {
113 struct ifg_group *ifg;
114 struct ifnet *ifp;
115 struct pfi_kif *kif;
116
117 V_pfi_buffer_max = 64;
118 V_pfi_buffer = malloc(V_pfi_buffer_max * sizeof(*V_pfi_buffer),
119 PFI_MTYPE, M_WAITOK);
120
121 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
122 PF_RULES_WLOCK();
123 V_pfi_all = pfi_kif_attach(kif, IFG_ALL);
124 PF_RULES_WUNLOCK();
125
126 IFNET_RLOCK();
127 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
128 pfi_attach_ifgroup(ifg);
129 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
130 pfi_attach_ifnet(ifp);
131 IFNET_RUNLOCK();
132
133 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event,
134 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
135 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event,
136 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
137 pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event,
138 pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
139 pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event,
140 pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY);
141 pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event,
142 pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
143 pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event,
144 pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
145 }
146
147 void
pfi_cleanup(void)148 pfi_cleanup(void)
149 {
150 struct pfi_kif *p;
151
152 EVENTHANDLER_DEREGISTER(ifnet_arrival_event, pfi_attach_cookie);
153 EVENTHANDLER_DEREGISTER(ifnet_departure_event, pfi_detach_cookie);
154 EVENTHANDLER_DEREGISTER(group_attach_event, pfi_attach_group_cookie);
155 EVENTHANDLER_DEREGISTER(group_change_event, pfi_change_group_cookie);
156 EVENTHANDLER_DEREGISTER(group_detach_event, pfi_detach_group_cookie);
157 EVENTHANDLER_DEREGISTER(ifaddr_event, pfi_ifaddr_event_cookie);
158
159 V_pfi_all = NULL;
160 while ((p = RB_MIN(pfi_ifhead, &V_pfi_ifs))) {
161 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, p);
162 free(p, PFI_MTYPE);
163 }
164
165 while ((p = LIST_FIRST(&V_pfi_unlinked_kifs))) {
166 LIST_REMOVE(p, pfik_list);
167 free(p, PFI_MTYPE);
168 }
169
170 free(V_pfi_buffer, PFI_MTYPE);
171 }
172
173 struct pfi_kif *
pfi_kif_find(const char * kif_name)174 pfi_kif_find(const char *kif_name)
175 {
176 struct pfi_kif_cmp s;
177
178 PF_RULES_ASSERT();
179
180 bzero(&s, sizeof(s));
181 strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name));
182
183 return (RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&s));
184 }
185
186 struct pfi_kif *
pfi_kif_attach(struct pfi_kif * kif,const char * kif_name)187 pfi_kif_attach(struct pfi_kif *kif, const char *kif_name)
188 {
189 struct pfi_kif *kif1;
190
191 PF_RULES_WASSERT();
192 KASSERT(kif != NULL, ("%s: null kif", __func__));
193
194 kif1 = pfi_kif_find(kif_name);
195 if (kif1 != NULL) {
196 free(kif, PFI_MTYPE);
197 return (kif1);
198 }
199
200 bzero(kif, sizeof(*kif));
201 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
202 /*
203 * It seems that the value of time_second is in unintialzied state
204 * when pf sets interface statistics clear time in boot phase if pf
205 * was statically linked to kernel. Instead of setting the bogus
206 * time value have pfi_get_ifaces handle this case. In
207 * pfi_get_ifaces it uses time_second if it sees the time is 0.
208 */
209 kif->pfik_tzero = time_second > 1 ? time_second : 0;
210 TAILQ_INIT(&kif->pfik_dynaddrs);
211
212 RB_INSERT(pfi_ifhead, &V_pfi_ifs, kif);
213
214 return (kif);
215 }
216
217 void
pfi_kif_ref(struct pfi_kif * kif)218 pfi_kif_ref(struct pfi_kif *kif)
219 {
220
221 PF_RULES_WASSERT();
222 kif->pfik_rulerefs++;
223 }
224
225 void
pfi_kif_unref(struct pfi_kif * kif)226 pfi_kif_unref(struct pfi_kif *kif)
227 {
228
229 PF_RULES_WASSERT();
230 KASSERT(kif->pfik_rulerefs > 0, ("%s: %p has zero refs", __func__, kif));
231
232 kif->pfik_rulerefs--;
233
234 if (kif->pfik_rulerefs > 0)
235 return;
236
237 /* kif referencing an existing ifnet or group should exist. */
238 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == V_pfi_all)
239 return;
240
241 RB_REMOVE(pfi_ifhead, &V_pfi_ifs, kif);
242
243 kif->pfik_flags |= PFI_IFLAG_REFS;
244
245 mtx_lock(&pfi_unlnkdkifs_mtx);
246 LIST_INSERT_HEAD(&V_pfi_unlinked_kifs, kif, pfik_list);
247 mtx_unlock(&pfi_unlnkdkifs_mtx);
248 }
249
250 void
pfi_kif_purge(void)251 pfi_kif_purge(void)
252 {
253 struct pfi_kif *kif, *kif1;
254
255 /*
256 * Do naive mark-and-sweep garbage collecting of old kifs.
257 * Reference flag is raised by pf_purge_expired_states().
258 */
259 mtx_lock(&pfi_unlnkdkifs_mtx);
260 LIST_FOREACH_SAFE(kif, &V_pfi_unlinked_kifs, pfik_list, kif1) {
261 if (!(kif->pfik_flags & PFI_IFLAG_REFS)) {
262 LIST_REMOVE(kif, pfik_list);
263 free(kif, PFI_MTYPE);
264 } else
265 kif->pfik_flags &= ~PFI_IFLAG_REFS;
266 }
267 mtx_unlock(&pfi_unlnkdkifs_mtx);
268 }
269
270 int
pfi_kif_match(struct pfi_kif * rule_kif,struct pfi_kif * packet_kif)271 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
272 {
273 struct ifg_list *p;
274
275 if (rule_kif == NULL || rule_kif == packet_kif)
276 return (1);
277
278 if (rule_kif->pfik_group != NULL)
279 /* XXXGL: locking? */
280 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next)
281 if (p->ifgl_group == rule_kif->pfik_group)
282 return (1);
283
284 return (0);
285 }
286
287 static void
pfi_attach_ifnet(struct ifnet * ifp)288 pfi_attach_ifnet(struct ifnet *ifp)
289 {
290 struct pfi_kif *kif;
291
292 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
293
294 PF_RULES_WLOCK();
295 V_pfi_update++;
296 kif = pfi_kif_attach(kif, ifp->if_xname);
297
298 kif->pfik_ifp = ifp;
299 ifp->if_pf_kif = kif;
300
301 pfi_kif_update(kif);
302 PF_RULES_WUNLOCK();
303 }
304
305 static void
pfi_attach_ifgroup(struct ifg_group * ifg)306 pfi_attach_ifgroup(struct ifg_group *ifg)
307 {
308 struct pfi_kif *kif;
309
310 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
311
312 PF_RULES_WLOCK();
313 V_pfi_update++;
314 kif = pfi_kif_attach(kif, ifg->ifg_group);
315
316 kif->pfik_group = ifg;
317 ifg->ifg_pf_kif = kif;
318 PF_RULES_WUNLOCK();
319 }
320
321 int
pfi_match_addr(struct pfi_dynaddr * dyn,struct pf_addr * a,sa_family_t af)322 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
323 {
324 switch (af) {
325 #ifdef INET
326 case AF_INET:
327 switch (dyn->pfid_acnt4) {
328 case 0:
329 return (0);
330 case 1:
331 return (PF_MATCHA(0, &dyn->pfid_addr4,
332 &dyn->pfid_mask4, a, AF_INET));
333 default:
334 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
335 }
336 break;
337 #endif /* INET */
338 #ifdef INET6
339 case AF_INET6:
340 switch (dyn->pfid_acnt6) {
341 case 0:
342 return (0);
343 case 1:
344 return (PF_MATCHA(0, &dyn->pfid_addr6,
345 &dyn->pfid_mask6, a, AF_INET6));
346 default:
347 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
348 }
349 break;
350 #endif /* INET6 */
351 default:
352 return (0);
353 }
354 }
355
356 int
pfi_dynaddr_setup(struct pf_addr_wrap * aw,sa_family_t af)357 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
358 {
359 struct pfi_dynaddr *dyn;
360 char tblname[PF_TABLE_NAME_SIZE];
361 struct pf_ruleset *ruleset = NULL;
362 struct pfi_kif *kif;
363 int rv = 0;
364
365 PF_RULES_WASSERT();
366 KASSERT(aw->type == PF_ADDR_DYNIFTL, ("%s: type %u",
367 __func__, aw->type));
368 KASSERT(aw->p.dyn == NULL, ("%s: dyn is %p", __func__, aw->p.dyn));
369
370 if ((dyn = malloc(sizeof(*dyn), PFI_MTYPE, M_NOWAIT | M_ZERO)) == NULL)
371 return (ENOMEM);
372
373 if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_NOWAIT)) == NULL) {
374 free(dyn, PFI_MTYPE);
375 return (ENOMEM);
376 }
377
378 if (!strcmp(aw->v.ifname, "self"))
379 dyn->pfid_kif = pfi_kif_attach(kif, IFG_ALL);
380 else
381 dyn->pfid_kif = pfi_kif_attach(kif, aw->v.ifname);
382 pfi_kif_ref(dyn->pfid_kif);
383
384 dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
385 if (af == AF_INET && dyn->pfid_net == 32)
386 dyn->pfid_net = 128;
387 strlcpy(tblname, aw->v.ifname, sizeof(tblname));
388 if (aw->iflags & PFI_AFLAG_NETWORK)
389 strlcat(tblname, ":network", sizeof(tblname));
390 if (aw->iflags & PFI_AFLAG_BROADCAST)
391 strlcat(tblname, ":broadcast", sizeof(tblname));
392 if (aw->iflags & PFI_AFLAG_PEER)
393 strlcat(tblname, ":peer", sizeof(tblname));
394 if (aw->iflags & PFI_AFLAG_NOALIAS)
395 strlcat(tblname, ":0", sizeof(tblname));
396 if (dyn->pfid_net != 128)
397 snprintf(tblname + strlen(tblname),
398 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
399 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
400 rv = ENOMEM;
401 goto _bad;
402 }
403
404 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
405 rv = ENOMEM;
406 goto _bad;
407 }
408
409 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
410 dyn->pfid_iflags = aw->iflags;
411 dyn->pfid_af = af;
412
413 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
414 aw->p.dyn = dyn;
415 pfi_kif_update(dyn->pfid_kif);
416
417 return (0);
418
419 _bad:
420 if (dyn->pfid_kt != NULL)
421 pfr_detach_table(dyn->pfid_kt);
422 if (ruleset != NULL)
423 pf_remove_if_empty_ruleset(ruleset);
424 if (dyn->pfid_kif != NULL)
425 pfi_kif_unref(dyn->pfid_kif);
426 free(dyn, PFI_MTYPE);
427
428 return (rv);
429 }
430
431 static void
pfi_kif_update(struct pfi_kif * kif)432 pfi_kif_update(struct pfi_kif *kif)
433 {
434 struct ifg_list *ifgl;
435 struct pfi_dynaddr *p;
436
437 PF_RULES_WASSERT();
438
439 /* update all dynaddr */
440 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
441 pfi_dynaddr_update(p);
442
443 /* again for all groups kif is member of */
444 if (kif->pfik_ifp != NULL) {
445 IF_ADDR_RLOCK(kif->pfik_ifp);
446 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next)
447 pfi_kif_update((struct pfi_kif *)
448 ifgl->ifgl_group->ifg_pf_kif);
449 IF_ADDR_RUNLOCK(kif->pfik_ifp);
450 }
451 }
452
453 static void
pfi_dynaddr_update(struct pfi_dynaddr * dyn)454 pfi_dynaddr_update(struct pfi_dynaddr *dyn)
455 {
456 struct pfi_kif *kif;
457 struct pfr_ktable *kt;
458
459 PF_RULES_WASSERT();
460 KASSERT(dyn && dyn->pfid_kif && dyn->pfid_kt,
461 ("%s: bad argument", __func__));
462
463 kif = dyn->pfid_kif;
464 kt = dyn->pfid_kt;
465
466 if (kt->pfrkt_larg != V_pfi_update) {
467 /* this table needs to be brought up-to-date */
468 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
469 kt->pfrkt_larg = V_pfi_update;
470 }
471 pfr_dynaddr_update(kt, dyn);
472 }
473
474 static void
pfi_table_update(struct pfr_ktable * kt,struct pfi_kif * kif,int net,int flags)475 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
476 {
477 int e, size2 = 0;
478 struct ifg_member *ifgm;
479
480 V_pfi_buffer_cnt = 0;
481
482 if (kif->pfik_ifp != NULL)
483 pfi_instance_add(kif->pfik_ifp, net, flags);
484 else if (kif->pfik_group != NULL) {
485 IFNET_RLOCK_NOSLEEP();
486 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next)
487 pfi_instance_add(ifgm->ifgm_ifp, net, flags);
488 IFNET_RUNLOCK_NOSLEEP();
489 }
490
491 if ((e = pfr_set_addrs(&kt->pfrkt_t, V_pfi_buffer, V_pfi_buffer_cnt, &size2,
492 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
493 printf("%s: cannot set %d new addresses into table %s: %d\n",
494 __func__, V_pfi_buffer_cnt, kt->pfrkt_name, e);
495 }
496
497 static void
pfi_instance_add(struct ifnet * ifp,int net,int flags)498 pfi_instance_add(struct ifnet *ifp, int net, int flags)
499 {
500 struct ifaddr *ia;
501 int got4 = 0, got6 = 0;
502 int net2, af;
503
504 IF_ADDR_RLOCK(ifp);
505 TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_list) {
506 if (ia->ifa_addr == NULL)
507 continue;
508 af = ia->ifa_addr->sa_family;
509 if (af != AF_INET && af != AF_INET6)
510 continue;
511 /*
512 * XXX: For point-to-point interfaces, (ifname:0) and IPv4,
513 * jump over addresses without a proper route to work
514 * around a problem with ppp not fully removing the
515 * address used during IPCP.
516 */
517 if ((ifp->if_flags & IFF_POINTOPOINT) &&
518 !(ia->ifa_flags & IFA_ROUTE) &&
519 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET))
520 continue;
521 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6)
522 continue;
523 if ((flags & PFI_AFLAG_BROADCAST) &&
524 !(ifp->if_flags & IFF_BROADCAST))
525 continue;
526 if ((flags & PFI_AFLAG_PEER) &&
527 !(ifp->if_flags & IFF_POINTOPOINT))
528 continue;
529 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
530 IN6_IS_ADDR_LINKLOCAL(
531 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr))
532 continue;
533 if (flags & PFI_AFLAG_NOALIAS) {
534 if (af == AF_INET && got4)
535 continue;
536 if (af == AF_INET6 && got6)
537 continue;
538 }
539 if (af == AF_INET)
540 got4 = 1;
541 else if (af == AF_INET6)
542 got6 = 1;
543 net2 = net;
544 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
545 if (af == AF_INET)
546 net2 = pfi_unmask(&((struct sockaddr_in *)
547 ia->ifa_netmask)->sin_addr);
548 else if (af == AF_INET6)
549 net2 = pfi_unmask(&((struct sockaddr_in6 *)
550 ia->ifa_netmask)->sin6_addr);
551 }
552 if (af == AF_INET && net2 > 32)
553 net2 = 32;
554 if (flags & PFI_AFLAG_BROADCAST)
555 pfi_address_add(ia->ifa_broadaddr, af, net2);
556 else if (flags & PFI_AFLAG_PEER)
557 pfi_address_add(ia->ifa_dstaddr, af, net2);
558 else
559 pfi_address_add(ia->ifa_addr, af, net2);
560 }
561 IF_ADDR_RUNLOCK(ifp);
562 }
563
564 static void
pfi_address_add(struct sockaddr * sa,int af,int net)565 pfi_address_add(struct sockaddr *sa, int af, int net)
566 {
567 struct pfr_addr *p;
568 int i;
569
570 if (V_pfi_buffer_cnt >= V_pfi_buffer_max) {
571 int new_max = V_pfi_buffer_max * 2;
572
573 if (new_max > PFI_BUFFER_MAX) {
574 printf("%s: address buffer full (%d/%d)\n", __func__,
575 V_pfi_buffer_cnt, PFI_BUFFER_MAX);
576 return;
577 }
578 p = malloc(new_max * sizeof(*V_pfi_buffer), PFI_MTYPE,
579 M_NOWAIT);
580 if (p == NULL) {
581 printf("%s: no memory to grow buffer (%d/%d)\n",
582 __func__, V_pfi_buffer_cnt, PFI_BUFFER_MAX);
583 return;
584 }
585 memcpy(p, V_pfi_buffer, V_pfi_buffer_max * sizeof(*V_pfi_buffer));
586 /* no need to zero buffer */
587 free(V_pfi_buffer, PFI_MTYPE);
588 V_pfi_buffer = p;
589 V_pfi_buffer_max = new_max;
590 }
591 if (af == AF_INET && net > 32)
592 net = 128;
593 p = V_pfi_buffer + V_pfi_buffer_cnt++;
594 bzero(p, sizeof(*p));
595 p->pfra_af = af;
596 p->pfra_net = net;
597 if (af == AF_INET)
598 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr;
599 else if (af == AF_INET6) {
600 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
601 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr))
602 p->pfra_ip6addr.s6_addr16[1] = 0;
603 }
604 /* mask network address bits */
605 if (net < 128)
606 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
607 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++)
608 ((caddr_t)p)[i] = 0;
609 }
610
611 void
pfi_dynaddr_remove(struct pfi_dynaddr * dyn)612 pfi_dynaddr_remove(struct pfi_dynaddr *dyn)
613 {
614
615 KASSERT(dyn->pfid_kif != NULL, ("%s: null pfid_kif", __func__));
616 KASSERT(dyn->pfid_kt != NULL, ("%s: null pfid_kt", __func__));
617
618 TAILQ_REMOVE(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
619 pfi_kif_unref(dyn->pfid_kif);
620 pfr_detach_table(dyn->pfid_kt);
621 free(dyn, PFI_MTYPE);
622 }
623
624 void
pfi_dynaddr_copyout(struct pf_addr_wrap * aw)625 pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
626 {
627
628 KASSERT(aw->type == PF_ADDR_DYNIFTL,
629 ("%s: type %u", __func__, aw->type));
630
631 if (aw->p.dyn == NULL || aw->p.dyn->pfid_kif == NULL)
632 return;
633 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
634 }
635
636 static int
pfi_if_compare(struct pfi_kif * p,struct pfi_kif * q)637 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
638 {
639 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
640 }
641
642 void
pfi_update_status(const char * name,struct pf_status * pfs)643 pfi_update_status(const char *name, struct pf_status *pfs)
644 {
645 struct pfi_kif *p;
646 struct pfi_kif_cmp key;
647 struct ifg_member p_member, *ifgm;
648 TAILQ_HEAD(, ifg_member) ifg_members;
649 int i, j, k;
650
651 strlcpy(key.pfik_name, name, sizeof(key.pfik_name));
652 p = RB_FIND(pfi_ifhead, &V_pfi_ifs, (struct pfi_kif *)&key);
653 if (p == NULL)
654 return;
655
656 if (p->pfik_group != NULL) {
657 bcopy(&p->pfik_group->ifg_members, &ifg_members,
658 sizeof(ifg_members));
659 } else {
660 /* build a temporary list for p only */
661 bzero(&p_member, sizeof(p_member));
662 p_member.ifgm_ifp = p->pfik_ifp;
663 TAILQ_INIT(&ifg_members);
664 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next);
665 }
666 if (pfs) {
667 bzero(pfs->pcounters, sizeof(pfs->pcounters));
668 bzero(pfs->bcounters, sizeof(pfs->bcounters));
669 }
670 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) {
671 if (ifgm->ifgm_ifp == NULL)
672 continue;
673 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif;
674
675 /* just clear statistics */
676 if (pfs == NULL) {
677 bzero(p->pfik_packets, sizeof(p->pfik_packets));
678 bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
679 p->pfik_tzero = time_second;
680 continue;
681 }
682 for (i = 0; i < 2; i++)
683 for (j = 0; j < 2; j++)
684 for (k = 0; k < 2; k++) {
685 pfs->pcounters[i][j][k] +=
686 p->pfik_packets[i][j][k];
687 pfs->bcounters[i][j] +=
688 p->pfik_bytes[i][j][k];
689 }
690 }
691 }
692
693 void
pfi_get_ifaces(const char * name,struct pfi_kif * buf,int * size)694 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size)
695 {
696 struct pfi_kif *p, *nextp;
697 int n = 0;
698
699 for (p = RB_MIN(pfi_ifhead, &V_pfi_ifs); p; p = nextp) {
700 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p);
701 if (pfi_skip_if(name, p))
702 continue;
703 if (*size <= n++)
704 break;
705 if (!p->pfik_tzero)
706 p->pfik_tzero = time_second;
707 bcopy(p, buf++, sizeof(*buf));
708 nextp = RB_NEXT(pfi_ifhead, &V_pfi_ifs, p);
709 }
710 *size = n;
711 }
712
713 static int
pfi_skip_if(const char * filter,struct pfi_kif * p)714 pfi_skip_if(const char *filter, struct pfi_kif *p)
715 {
716 int n;
717
718 if (filter == NULL || !*filter)
719 return (0);
720 if (!strcmp(p->pfik_name, filter))
721 return (0); /* exact match */
722 n = strlen(filter);
723 if (n < 1 || n >= IFNAMSIZ)
724 return (1); /* sanity check */
725 if (filter[n-1] >= '0' && filter[n-1] <= '9')
726 return (1); /* only do exact match in that case */
727 if (strncmp(p->pfik_name, filter, n))
728 return (1); /* prefix doesn't match */
729 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
730 }
731
732 int
pfi_set_flags(const char * name,int flags)733 pfi_set_flags(const char *name, int flags)
734 {
735 struct pfi_kif *p;
736
737 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) {
738 if (pfi_skip_if(name, p))
739 continue;
740 p->pfik_flags |= flags;
741 }
742 return (0);
743 }
744
745 int
pfi_clear_flags(const char * name,int flags)746 pfi_clear_flags(const char *name, int flags)
747 {
748 struct pfi_kif *p;
749
750 RB_FOREACH(p, pfi_ifhead, &V_pfi_ifs) {
751 if (pfi_skip_if(name, p))
752 continue;
753 p->pfik_flags &= ~flags;
754 }
755 return (0);
756 }
757
758 /* from pf_print_state.c */
759 static int
pfi_unmask(void * addr)760 pfi_unmask(void *addr)
761 {
762 struct pf_addr *m = addr;
763 int i = 31, j = 0, b = 0;
764 u_int32_t tmp;
765
766 while (j < 4 && m->addr32[j] == 0xffffffff) {
767 b += 32;
768 j++;
769 }
770 if (j < 4) {
771 tmp = ntohl(m->addr32[j]);
772 for (i = 31; tmp & (1 << i); --i)
773 b++;
774 }
775 return (b);
776 }
777
778 static void
pfi_attach_ifnet_event(void * arg __unused,struct ifnet * ifp)779 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp)
780 {
781
782 CURVNET_SET(ifp->if_vnet);
783 pfi_attach_ifnet(ifp);
784 #ifdef ALTQ
785 PF_RULES_WLOCK();
786 pf_altq_ifnet_event(ifp, 0);
787 PF_RULES_WUNLOCK();
788 #endif
789 CURVNET_RESTORE();
790 }
791
792 static void
pfi_detach_ifnet_event(void * arg __unused,struct ifnet * ifp)793 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp)
794 {
795 struct pfi_kif *kif = (struct pfi_kif *)ifp->if_pf_kif;
796
797 CURVNET_SET(ifp->if_vnet);
798 PF_RULES_WLOCK();
799 V_pfi_update++;
800 pfi_kif_update(kif);
801
802 kif->pfik_ifp = NULL;
803 ifp->if_pf_kif = NULL;
804 #ifdef ALTQ
805 pf_altq_ifnet_event(ifp, 1);
806 #endif
807 PF_RULES_WUNLOCK();
808 CURVNET_RESTORE();
809 }
810
811 static void
pfi_attach_group_event(void * arg,struct ifg_group * ifg)812 pfi_attach_group_event(void *arg , struct ifg_group *ifg)
813 {
814
815 CURVNET_SET((struct vnet *)arg);
816 pfi_attach_ifgroup(ifg);
817 CURVNET_RESTORE();
818 }
819
820 static void
pfi_change_group_event(void * arg,char * gname)821 pfi_change_group_event(void *arg, char *gname)
822 {
823 struct pfi_kif *kif;
824
825 kif = malloc(sizeof(*kif), PFI_MTYPE, M_WAITOK);
826
827 CURVNET_SET((struct vnet *)arg);
828 PF_RULES_WLOCK();
829 V_pfi_update++;
830 kif = pfi_kif_attach(kif, gname);
831 pfi_kif_update(kif);
832 PF_RULES_WUNLOCK();
833 CURVNET_RESTORE();
834 }
835
836 static void
pfi_detach_group_event(void * arg,struct ifg_group * ifg)837 pfi_detach_group_event(void *arg, struct ifg_group *ifg)
838 {
839 struct pfi_kif *kif = (struct pfi_kif *)ifg->ifg_pf_kif;
840
841 CURVNET_SET((struct vnet *)arg);
842 PF_RULES_WLOCK();
843 V_pfi_update++;
844
845 kif->pfik_group = NULL;
846 ifg->ifg_pf_kif = NULL;
847 PF_RULES_WUNLOCK();
848 CURVNET_RESTORE();
849 }
850
851 static void
pfi_ifaddr_event(void * arg __unused,struct ifnet * ifp)852 pfi_ifaddr_event(void *arg __unused, struct ifnet *ifp)
853 {
854
855 CURVNET_SET(ifp->if_vnet);
856 PF_RULES_WLOCK();
857 if (ifp && ifp->if_pf_kif) {
858 V_pfi_update++;
859 pfi_kif_update(ifp->if_pf_kif);
860 }
861 PF_RULES_WUNLOCK();
862 CURVNET_RESTORE();
863 }
864