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1.1 nbrk 1: /* $OpenBSD: pf_if.c,v 1.47 2007/07/13 09:17:48 markus Exp $ */
2:
3: /*
4: * Copyright 2005 Henning Brauer <henning@openbsd.org>
5: * Copyright 2005 Ryan McBride <mcbride@openbsd.org>
6: * Copyright (c) 2001 Daniel Hartmeier
7: * Copyright (c) 2003 Cedric Berger
8: * All rights reserved.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: *
14: * - Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * - Redistributions in binary form must reproduce the above
17: * copyright notice, this list of conditions and the following
18: * disclaimer in the documentation and/or other materials provided
19: * with the distribution.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24: * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25: * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27: * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
29: * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32: * POSSIBILITY OF SUCH DAMAGE.
33: */
34:
35: #include <sys/param.h>
36: #include <sys/systm.h>
37: #include <sys/mbuf.h>
38: #include <sys/filio.h>
39: #include <sys/socket.h>
40: #include <sys/socketvar.h>
41: #include <sys/kernel.h>
42: #include <sys/device.h>
43: #include <sys/time.h>
44:
45: #include <net/if.h>
46: #include <net/if_types.h>
47:
48: #include <netinet/in.h>
49: #include <netinet/in_var.h>
50: #include <netinet/in_systm.h>
51: #include <netinet/ip.h>
52: #include <netinet/ip_var.h>
53:
54: #include <net/pfvar.h>
55:
56: #ifdef INET6
57: #include <netinet/ip6.h>
58: #endif /* INET6 */
59:
60: struct pfi_kif *pfi_all = NULL;
61: struct pool pfi_addr_pl;
62: struct pfi_ifhead pfi_ifs;
63: long pfi_update = 1;
64: struct pfr_addr *pfi_buffer;
65: int pfi_buffer_cnt;
66: int pfi_buffer_max;
67:
68: void pfi_kif_update(struct pfi_kif *);
69: void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
70: void pfi_table_update(struct pfr_ktable *, struct pfi_kif *,
71: int, int);
72: void pfi_kifaddr_update(void *);
73: void pfi_instance_add(struct ifnet *, int, int);
74: void pfi_address_add(struct sockaddr *, int, int);
75: int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
76: int pfi_skip_if(const char *, struct pfi_kif *);
77: int pfi_unmask(void *);
78:
79: RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
80: RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
81:
82: #define PFI_BUFFER_MAX 0x10000
83: #define PFI_MTYPE M_IFADDR
84:
85: void
86: pfi_initialize(void)
87: {
88: if (pfi_all != NULL) /* already initialized */
89: return;
90:
91: pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0,
92: "pfiaddrpl", &pool_allocator_nointr);
93: pfi_buffer_max = 64;
94: pfi_buffer = malloc(pfi_buffer_max * sizeof(*pfi_buffer),
95: PFI_MTYPE, M_WAITOK);
96:
97: if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL)
98: panic("pfi_kif_get for pfi_all failed");
99: }
100:
101: struct pfi_kif *
102: pfi_kif_get(const char *kif_name)
103: {
104: struct pfi_kif *kif;
105: struct pfi_kif_cmp s;
106:
107: bzero(&s, sizeof(s));
108: strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name));
109: if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL)
110: return (kif);
111:
112: /* create new one */
113: if ((kif = malloc(sizeof(*kif), PFI_MTYPE, M_DONTWAIT)) == NULL)
114: return (NULL);
115:
116: bzero(kif, sizeof(*kif));
117: strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
118: kif->pfik_tzero = time_second;
119: TAILQ_INIT(&kif->pfik_dynaddrs);
120:
121: RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
122: return (kif);
123: }
124:
125: void
126: pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
127: {
128: switch (what) {
129: case PFI_KIF_REF_RULE:
130: kif->pfik_rules++;
131: break;
132: case PFI_KIF_REF_STATE:
133: kif->pfik_states++;
134: break;
135: default:
136: panic("pfi_kif_ref with unknown type");
137: }
138: }
139:
140: void
141: pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
142: {
143: if (kif == NULL)
144: return;
145:
146: switch (what) {
147: case PFI_KIF_REF_NONE:
148: break;
149: case PFI_KIF_REF_RULE:
150: if (kif->pfik_rules <= 0) {
151: printf("pfi_kif_unref: rules refcount <= 0\n");
152: return;
153: }
154: kif->pfik_rules--;
155: break;
156: case PFI_KIF_REF_STATE:
157: if (kif->pfik_states <= 0) {
158: printf("pfi_kif_unref: state refcount <= 0\n");
159: return;
160: }
161: kif->pfik_states--;
162: break;
163: default:
164: panic("pfi_kif_unref with unknown type");
165: }
166:
167: if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all)
168: return;
169:
170: if (kif->pfik_rules || kif->pfik_states)
171: return;
172:
173: RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
174: free(kif, PFI_MTYPE);
175: }
176:
177: int
178: pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
179: {
180: struct ifg_list *p;
181:
182: if (rule_kif == NULL || rule_kif == packet_kif)
183: return (1);
184:
185: if (rule_kif->pfik_group != NULL)
186: TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next)
187: if (p->ifgl_group == rule_kif->pfik_group)
188: return (1);
189:
190: return (0);
191: }
192:
193: void
194: pfi_attach_ifnet(struct ifnet *ifp)
195: {
196: struct pfi_kif *kif;
197: int s;
198:
199: pfi_initialize();
200: s = splsoftnet();
201: pfi_update++;
202: if ((kif = pfi_kif_get(ifp->if_xname)) == NULL)
203: panic("pfi_kif_get failed");
204:
205: kif->pfik_ifp = ifp;
206: ifp->if_pf_kif = (caddr_t)kif;
207:
208: if ((kif->pfik_ah_cookie = hook_establish(ifp->if_addrhooks, 1,
209: pfi_kifaddr_update, kif)) == NULL)
210: panic("pfi_attach_ifnet: cannot allocate '%s' address hook",
211: ifp->if_xname);
212:
213: pfi_kif_update(kif);
214:
215: splx(s);
216: }
217:
218: void
219: pfi_detach_ifnet(struct ifnet *ifp)
220: {
221: int s;
222: struct pfi_kif *kif;
223:
224: if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL)
225: return;
226:
227: s = splsoftnet();
228: pfi_update++;
229: hook_disestablish(ifp->if_addrhooks, kif->pfik_ah_cookie);
230: pfi_kif_update(kif);
231:
232: kif->pfik_ifp = NULL;
233: ifp->if_pf_kif = NULL;
234: pfi_kif_unref(kif, PFI_KIF_REF_NONE);
235: splx(s);
236: }
237:
238: void
239: pfi_attach_ifgroup(struct ifg_group *ifg)
240: {
241: struct pfi_kif *kif;
242: int s;
243:
244: pfi_initialize();
245: s = splsoftnet();
246: pfi_update++;
247: if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL)
248: panic("pfi_kif_get failed");
249:
250: kif->pfik_group = ifg;
251: ifg->ifg_pf_kif = (caddr_t)kif;
252:
253: splx(s);
254: }
255:
256: void
257: pfi_detach_ifgroup(struct ifg_group *ifg)
258: {
259: int s;
260: struct pfi_kif *kif;
261:
262: if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL)
263: return;
264:
265: s = splsoftnet();
266: pfi_update++;
267:
268: kif->pfik_group = NULL;
269: ifg->ifg_pf_kif = NULL;
270: pfi_kif_unref(kif, PFI_KIF_REF_NONE);
271: splx(s);
272: }
273:
274: void
275: pfi_group_change(const char *group)
276: {
277: struct pfi_kif *kif;
278: int s;
279:
280: s = splsoftnet();
281: pfi_update++;
282: if ((kif = pfi_kif_get(group)) == NULL)
283: panic("pfi_kif_get failed");
284:
285: pfi_kif_update(kif);
286:
287: splx(s);
288: }
289:
290: int
291: pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
292: {
293: switch (af) {
294: #ifdef INET
295: case AF_INET:
296: switch (dyn->pfid_acnt4) {
297: case 0:
298: return (0);
299: case 1:
300: return (PF_MATCHA(0, &dyn->pfid_addr4,
301: &dyn->pfid_mask4, a, AF_INET));
302: default:
303: return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
304: }
305: break;
306: #endif /* INET */
307: #ifdef INET6
308: case AF_INET6:
309: switch (dyn->pfid_acnt6) {
310: case 0:
311: return (0);
312: case 1:
313: return (PF_MATCHA(0, &dyn->pfid_addr6,
314: &dyn->pfid_mask6, a, AF_INET6));
315: default:
316: return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
317: }
318: break;
319: #endif /* INET6 */
320: default:
321: return (0);
322: }
323: }
324:
325: int
326: pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
327: {
328: struct pfi_dynaddr *dyn;
329: char tblname[PF_TABLE_NAME_SIZE];
330: struct pf_ruleset *ruleset = NULL;
331: int s, rv = 0;
332:
333: if (aw->type != PF_ADDR_DYNIFTL)
334: return (0);
335: if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL)
336: return (1);
337: bzero(dyn, sizeof(*dyn));
338:
339: s = splsoftnet();
340: if (!strcmp(aw->v.ifname, "self"))
341: dyn->pfid_kif = pfi_kif_get(IFG_ALL);
342: else
343: dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
344: if (dyn->pfid_kif == NULL) {
345: rv = 1;
346: goto _bad;
347: }
348: pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
349:
350: dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
351: if (af == AF_INET && dyn->pfid_net == 32)
352: dyn->pfid_net = 128;
353: strlcpy(tblname, aw->v.ifname, sizeof(tblname));
354: if (aw->iflags & PFI_AFLAG_NETWORK)
355: strlcat(tblname, ":network", sizeof(tblname));
356: if (aw->iflags & PFI_AFLAG_BROADCAST)
357: strlcat(tblname, ":broadcast", sizeof(tblname));
358: if (aw->iflags & PFI_AFLAG_PEER)
359: strlcat(tblname, ":peer", sizeof(tblname));
360: if (aw->iflags & PFI_AFLAG_NOALIAS)
361: strlcat(tblname, ":0", sizeof(tblname));
362: if (dyn->pfid_net != 128)
363: snprintf(tblname + strlen(tblname),
364: sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
365: if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
366: rv = 1;
367: goto _bad;
368: }
369:
370: if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
371: rv = 1;
372: goto _bad;
373: }
374:
375: dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
376: dyn->pfid_iflags = aw->iflags;
377: dyn->pfid_af = af;
378:
379: TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
380: aw->p.dyn = dyn;
381: pfi_kif_update(dyn->pfid_kif);
382: splx(s);
383: return (0);
384:
385: _bad:
386: if (dyn->pfid_kt != NULL)
387: pfr_detach_table(dyn->pfid_kt);
388: if (ruleset != NULL)
389: pf_remove_if_empty_ruleset(ruleset);
390: if (dyn->pfid_kif != NULL)
391: pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
392: pool_put(&pfi_addr_pl, dyn);
393: splx(s);
394: return (rv);
395: }
396:
397: void
398: pfi_kif_update(struct pfi_kif *kif)
399: {
400: struct ifg_list *ifgl;
401: struct pfi_dynaddr *p;
402:
403: /* update all dynaddr */
404: TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
405: pfi_dynaddr_update(p);
406:
407: /* again for all groups kif is member of */
408: if (kif->pfik_ifp != NULL)
409: TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next)
410: pfi_kif_update((struct pfi_kif *)
411: ifgl->ifgl_group->ifg_pf_kif);
412: }
413:
414: void
415: pfi_dynaddr_update(struct pfi_dynaddr *dyn)
416: {
417: struct pfi_kif *kif;
418: struct pfr_ktable *kt;
419:
420: if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL)
421: panic("pfi_dynaddr_update");
422:
423: kif = dyn->pfid_kif;
424: kt = dyn->pfid_kt;
425:
426: if (kt->pfrkt_larg != pfi_update) {
427: /* this table needs to be brought up-to-date */
428: pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
429: kt->pfrkt_larg = pfi_update;
430: }
431: pfr_dynaddr_update(kt, dyn);
432: }
433:
434: void
435: pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
436: {
437: int e, size2 = 0;
438: struct ifg_member *ifgm;
439:
440: pfi_buffer_cnt = 0;
441:
442: if (kif->pfik_ifp != NULL)
443: pfi_instance_add(kif->pfik_ifp, net, flags);
444: else if (kif->pfik_group != NULL)
445: TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next)
446: pfi_instance_add(ifgm->ifgm_ifp, net, flags);
447:
448: if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2,
449: NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
450: printf("pfi_table_update: cannot set %d new addresses "
451: "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
452: }
453:
454: void
455: pfi_instance_add(struct ifnet *ifp, int net, int flags)
456: {
457: struct ifaddr *ia;
458: int got4 = 0, got6 = 0;
459: int net2, af;
460:
461: if (ifp == NULL)
462: return;
463: TAILQ_FOREACH(ia, &ifp->if_addrlist, ifa_list) {
464: if (ia->ifa_addr == NULL)
465: continue;
466: af = ia->ifa_addr->sa_family;
467: if (af != AF_INET && af != AF_INET6)
468: continue;
469: if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6)
470: continue;
471: if ((flags & PFI_AFLAG_BROADCAST) &&
472: !(ifp->if_flags & IFF_BROADCAST))
473: continue;
474: if ((flags & PFI_AFLAG_PEER) &&
475: !(ifp->if_flags & IFF_POINTOPOINT))
476: continue;
477: if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
478: IN6_IS_ADDR_LINKLOCAL(
479: &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr))
480: continue;
481: if (flags & PFI_AFLAG_NOALIAS) {
482: if (af == AF_INET && got4)
483: continue;
484: if (af == AF_INET6 && got6)
485: continue;
486: }
487: if (af == AF_INET)
488: got4 = 1;
489: else if (af == AF_INET6)
490: got6 = 1;
491: net2 = net;
492: if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
493: if (af == AF_INET)
494: net2 = pfi_unmask(&((struct sockaddr_in *)
495: ia->ifa_netmask)->sin_addr);
496: else if (af == AF_INET6)
497: net2 = pfi_unmask(&((struct sockaddr_in6 *)
498: ia->ifa_netmask)->sin6_addr);
499: }
500: if (af == AF_INET && net2 > 32)
501: net2 = 32;
502: if (flags & PFI_AFLAG_BROADCAST)
503: pfi_address_add(ia->ifa_broadaddr, af, net2);
504: else if (flags & PFI_AFLAG_PEER)
505: pfi_address_add(ia->ifa_dstaddr, af, net2);
506: else
507: pfi_address_add(ia->ifa_addr, af, net2);
508: }
509: }
510:
511: void
512: pfi_address_add(struct sockaddr *sa, int af, int net)
513: {
514: struct pfr_addr *p;
515: int i;
516:
517: if (pfi_buffer_cnt >= pfi_buffer_max) {
518: int new_max = pfi_buffer_max * 2;
519:
520: if (new_max > PFI_BUFFER_MAX) {
521: printf("pfi_address_add: address buffer full (%d/%d)\n",
522: pfi_buffer_cnt, PFI_BUFFER_MAX);
523: return;
524: }
525: p = malloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE,
526: M_DONTWAIT);
527: if (p == NULL) {
528: printf("pfi_address_add: no memory to grow buffer "
529: "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
530: return;
531: }
532: memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer));
533: /* no need to zero buffer */
534: free(pfi_buffer, PFI_MTYPE);
535: pfi_buffer = p;
536: pfi_buffer_max = new_max;
537: }
538: if (af == AF_INET && net > 32)
539: net = 128;
540: p = pfi_buffer + pfi_buffer_cnt++;
541: bzero(p, sizeof(*p));
542: p->pfra_af = af;
543: p->pfra_net = net;
544: if (af == AF_INET)
545: p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr;
546: else if (af == AF_INET6) {
547: p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
548: if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr))
549: p->pfra_ip6addr.s6_addr16[1] = 0;
550: }
551: /* mask network address bits */
552: if (net < 128)
553: ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
554: for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++)
555: ((caddr_t)p)[i] = 0;
556: }
557:
558: void
559: pfi_dynaddr_remove(struct pf_addr_wrap *aw)
560: {
561: int s;
562:
563: if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
564: aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
565: return;
566:
567: s = splsoftnet();
568: TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
569: pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
570: aw->p.dyn->pfid_kif = NULL;
571: pfr_detach_table(aw->p.dyn->pfid_kt);
572: aw->p.dyn->pfid_kt = NULL;
573: pool_put(&pfi_addr_pl, aw->p.dyn);
574: aw->p.dyn = NULL;
575: splx(s);
576: }
577:
578: void
579: pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
580: {
581: if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
582: aw->p.dyn->pfid_kif == NULL)
583: return;
584: aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
585: }
586:
587: void
588: pfi_kifaddr_update(void *v)
589: {
590: int s;
591: struct pfi_kif *kif = (struct pfi_kif *)v;
592:
593: s = splsoftnet();
594: pfi_update++;
595: pfi_kif_update(kif);
596: splx(s);
597: }
598:
599: int
600: pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
601: {
602: return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
603: }
604:
605: void
606: pfi_fill_oldstatus(struct pf_status *pfs)
607: {
608: struct pfi_kif *p;
609: struct pfi_kif_cmp key;
610: int i, j, k, s;
611:
612: strlcpy(key.pfik_name, pfs->ifname, sizeof(key.pfik_name));
613: s = splsoftnet();
614: p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key);
615: if (p == NULL) {
616: splx(s);
617: return;
618: }
619: bzero(pfs->pcounters, sizeof(pfs->pcounters));
620: bzero(pfs->bcounters, sizeof(pfs->bcounters));
621: for (i = 0; i < 2; i++)
622: for (j = 0; j < 2; j++)
623: for (k = 0; k < 2; k++) {
624: pfs->pcounters[i][j][k] =
625: p->pfik_packets[i][j][k];
626: pfs->bcounters[i][j] +=
627: p->pfik_bytes[i][j][k];
628: }
629: splx(s);
630: }
631:
632: int
633: pfi_clr_istats(const char *name)
634: {
635: struct pfi_kif *p;
636: int s;
637:
638: s = splsoftnet();
639: RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
640: if (pfi_skip_if(name, p))
641: continue;
642: bzero(p->pfik_packets, sizeof(p->pfik_packets));
643: bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
644: p->pfik_tzero = time_second;
645: }
646: splx(s);
647:
648: return (0);
649: }
650:
651: int
652: pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size)
653: {
654: struct pfi_kif *p, *nextp;
655: int s, n = 0;
656:
657: s = splsoftnet();
658: for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
659: nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
660: if (pfi_skip_if(name, p))
661: continue;
662: if (*size > n++) {
663: if (!p->pfik_tzero)
664: p->pfik_tzero = time_second;
665: pfi_kif_ref(p, PFI_KIF_REF_RULE);
666: if (copyout(p, buf++, sizeof(*buf))) {
667: pfi_kif_unref(p, PFI_KIF_REF_RULE);
668: splx(s);
669: return (EFAULT);
670: }
671: nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
672: pfi_kif_unref(p, PFI_KIF_REF_RULE);
673: }
674: }
675: splx(s);
676: *size = n;
677: return (0);
678: }
679:
680: int
681: pfi_skip_if(const char *filter, struct pfi_kif *p)
682: {
683: int n;
684:
685: if (filter == NULL || !*filter)
686: return (0);
687: if (!strcmp(p->pfik_name, filter))
688: return (0); /* exact match */
689: n = strlen(filter);
690: if (n < 1 || n >= IFNAMSIZ)
691: return (1); /* sanity check */
692: if (filter[n-1] >= '0' && filter[n-1] <= '9')
693: return (1); /* only do exact match in that case */
694: if (strncmp(p->pfik_name, filter, n))
695: return (1); /* prefix doesn't match */
696: return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
697: }
698:
699: int
700: pfi_set_flags(const char *name, int flags)
701: {
702: struct pfi_kif *p;
703: int s;
704:
705: s = splsoftnet();
706: RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
707: if (pfi_skip_if(name, p))
708: continue;
709: p->pfik_flags |= flags;
710: }
711: splx(s);
712: return (0);
713: }
714:
715: int
716: pfi_clear_flags(const char *name, int flags)
717: {
718: struct pfi_kif *p;
719: int s;
720:
721: s = splsoftnet();
722: RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
723: if (pfi_skip_if(name, p))
724: continue;
725: p->pfik_flags &= ~flags;
726: }
727: splx(s);
728: return (0);
729: }
730:
731: /* from pf_print_state.c */
732: int
733: pfi_unmask(void *addr)
734: {
735: struct pf_addr *m = addr;
736: int i = 31, j = 0, b = 0;
737: u_int32_t tmp;
738:
739: while (j < 4 && m->addr32[j] == 0xffffffff) {
740: b += 32;
741: j++;
742: }
743: if (j < 4) {
744: tmp = ntohl(m->addr32[j]);
745: for (i = 31; tmp & (1 << i); --i)
746: b++;
747: }
748: return (b);
749: }
750: