1 /* $OpenBSD: pf_if.c,v 1.46 2006/12/13 09:01:59 itojun Exp $ */
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
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
36 #include "opt_inet6.h"
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
42 #include <sys/eventhandler.h>
43 #include <sys/filio.h>
44 #include <sys/socket.h>
45 #include <sys/socketvar.h>
46 #include <sys/kernel.h>
47 #include <sys/thread2.h>
49 #include <vm/vm_zone.h>
52 #include <net/if_types.h>
53 #include <net/route.h>
55 #include <netinet/in.h>
56 #include <netinet/in_var.h>
57 #include <netinet/in_systm.h>
58 #include <netinet/ip.h>
59 #include <netinet/ip_var.h>
61 #include <net/pf/pfvar.h>
64 #include <netinet/ip6.h>
67 struct pfi_kif *pfi_all = NULL;
68 vm_zone_t pfi_addr_pl;
69 struct pfi_ifhead pfi_ifs;
71 struct pfr_addr *pfi_buffer;
75 eventhandler_tag pfi_clone_cookie = NULL;
76 eventhandler_tag pfi_attach_cookie = NULL;
77 eventhandler_tag pfi_detach_cookie = NULL;
79 void pfi_kif_update(struct pfi_kif *);
80 void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
81 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *,
83 void pfi_kifaddr_update(void *);
84 void pfi_instance_add(struct ifnet *, int, int);
85 void pfi_address_add(struct sockaddr *, int, int);
86 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
87 int pfi_skip_if(const char *, struct pfi_kif *);
88 int pfi_unmask(void *);
89 void pfi_kifaddr_update_event(void *, struct ifnet *,
90 enum ifaddr_event, struct ifaddr *);
91 /*XXX jl void pfi_attach_clone_event(void *, struct if_clone *);*/
92 void pfi_attach_ifnet_event(void *, struct ifnet *);
93 void pfi_detach_ifnet_event(void *, struct ifnet *);
95 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
96 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
98 #define PFI_BUFFER_MAX 0x10000
99 MALLOC_DEFINE(PFI_MTYPE, "pf_if", "pf interface table");
106 if (pfi_all != NULL) /* already initialized */
110 pfi_buffer = kmalloc(pfi_buffer_max * sizeof(*pfi_buffer),
111 PFI_MTYPE, M_WAITOK);
113 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL)
114 panic("pfi_kif_get for pfi_all failed");
116 TAILQ_FOREACH(ifp, &ifnet, if_link) {
117 if (ifp->if_dunit != IF_DUNIT_NONE)
118 pfi_attach_ifnet(ifp);
120 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_attach_event,
121 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
122 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_detach_event,
123 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
124 /* XXX jl pfi_clone_cookie = EVENTHANDLER_REGISTER(if_clone_event,
125 pfi_attach_clone_event, NULL, EVENTHANDLER_PRI_ANY); */
127 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL)
128 panic("pfi_kif_get for pfi_all failed");
134 struct pfi_kif *p, key;
137 EVENTHANDLER_DEREGISTER(ifnet_attach_event, pfi_attach_cookie);
138 EVENTHANDLER_DEREGISTER(ifnet_detach_event, pfi_detach_cookie);
139 EVENTHANDLER_DEREGISTER(if_clone_event, pfi_clone_cookie);
141 /* release PFI_IFLAG_INSTANCE */
142 TAILQ_FOREACH(ifp, &ifnet, if_link) {
143 strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name));
144 p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
146 pfi_detach_ifnet(ifp);
149 /* XXX clear all other interface group */
150 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) {
151 RB_REMOVE(pfi_ifhead, &pfi_ifs, p);
155 kfree(pfi_buffer, PFI_MTYPE);
161 * Wrapper functions for FreeBSD eventhandler
164 pfi_kifaddr_update_event(void *arg, struct ifnet *ifp,
165 enum ifaddr_event event __unused, struct ifaddr *ifa __unused)
167 struct pfi_kif *p = arg;
170 * Check to see if it is 'our' interface as we do not have per
171 * interface hooks and thus get an update for every interface.
173 if (p && p->pfik_ifp == ifp)
174 pfi_kifaddr_update(p);
179 pfi_attach_clone_event(void *arg __unused, struct if_clone *ifc)
181 pfi_attach_clone(ifc);
186 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp)
188 if (ifp->if_dunit != IF_DUNIT_NONE)
189 pfi_attach_ifnet(ifp);
193 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp)
195 pfi_detach_ifnet(ifp);
199 pfi_kif_get(const char *kif_name)
202 struct pfi_kif_cmp s;
204 bzero(&s, sizeof(s));
205 strlcpy(s.pfik_ifname, kif_name, sizeof(s.pfik_ifname));
206 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL)
210 if ((kif = kmalloc(sizeof(*kif), PFI_MTYPE, M_WAITOK)) == NULL)
213 bzero(kif, sizeof(*kif));
214 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
215 kif->pfik_tzero = time_second;
216 TAILQ_INIT(&kif->pfik_dynaddrs);
218 RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
223 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
226 case PFI_KIF_REF_RULE:
229 case PFI_KIF_REF_STATE:
233 panic("pfi_kif_ref with unknown type");
238 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
244 case PFI_KIF_REF_NONE:
246 case PFI_KIF_REF_RULE:
247 if (kif->pfik_rules <= 0) {
248 kprintf("pfi_kif_unref: rules refcount <= 0\n");
253 case PFI_KIF_REF_STATE:
254 if (kif->pfik_states <= 0) {
255 kprintf("pfi_kif_unref: state refcount <= 0\n");
261 panic("pfi_kif_unref with unknown type");
264 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all)
267 if (kif->pfik_rules || kif->pfik_states)
270 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
271 kfree(kif, PFI_MTYPE);
275 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
279 if (rule_kif == NULL || rule_kif == packet_kif)
282 if (rule_kif->pfik_group != NULL)
283 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next)
284 if (p->ifgl_group == rule_kif->pfik_group)
291 pfi_attach_ifnet(struct ifnet *ifp)
298 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL)
299 panic("pfi_kif_get failed");
302 ifp->if_pf_kif = (caddr_t)kif;
310 pfi_detach_ifnet(struct ifnet *ifp)
314 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL)
321 kif->pfik_ifp = NULL;
322 ifp->if_pf_kif = NULL;
323 pfi_kif_unref(kif, PFI_KIF_REF_NONE);
328 pfi_attach_ifgroup(struct ifg_group *ifg)
335 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL)
336 panic("pfi_kif_get failed");
338 kif->pfik_group = ifg;
339 ifg->ifg_pf_kif = (caddr_t)kif;
345 pfi_detach_ifgroup(struct ifg_group *ifg)
349 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL)
355 kif->pfik_group = NULL;
356 ifg->ifg_pf_kif = NULL;
357 pfi_kif_unref(kif, PFI_KIF_REF_NONE);
362 pfi_group_change(const char *group)
368 if ((kif = pfi_kif_get(group)) == NULL)
369 panic("pfi_kif_get failed");
377 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
382 switch (dyn->pfid_acnt4) {
386 return (PF_MATCHA(0, &dyn->pfid_addr4,
387 &dyn->pfid_mask4, a, AF_INET));
389 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
395 switch (dyn->pfid_acnt6) {
399 return (PF_MATCHA(0, &dyn->pfid_addr6,
400 &dyn->pfid_mask6, a, AF_INET6));
402 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
412 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
414 struct pfi_dynaddr *dyn;
415 char tblname[PF_TABLE_NAME_SIZE];
416 struct pf_ruleset *ruleset = NULL;
419 if (aw->type != PF_ADDR_DYNIFTL)
421 if ((dyn = pool_get(&pfi_addr_pl, PR_NOWAIT)) == NULL)
423 bzero(dyn, sizeof(*dyn));
426 if (!strcmp(aw->v.ifname, "self"))
427 dyn->pfid_kif = pfi_kif_get(IFG_ALL);
429 dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
430 if (dyn->pfid_kif == NULL) {
434 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
436 dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
437 if (af == AF_INET && dyn->pfid_net == 32)
439 strlcpy(tblname, aw->v.ifname, sizeof(tblname));
440 if (aw->iflags & PFI_AFLAG_NETWORK)
441 strlcat(tblname, ":network", sizeof(tblname));
442 if (aw->iflags & PFI_AFLAG_BROADCAST)
443 strlcat(tblname, ":broadcast", sizeof(tblname));
444 if (aw->iflags & PFI_AFLAG_PEER)
445 strlcat(tblname, ":peer", sizeof(tblname));
446 if (aw->iflags & PFI_AFLAG_NOALIAS)
447 strlcat(tblname, ":0", sizeof(tblname));
448 if (dyn->pfid_net != 128)
449 ksnprintf(tblname + strlen(tblname),
450 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
451 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
456 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
461 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
462 dyn->pfid_iflags = aw->iflags;
465 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
467 pfi_kif_update(dyn->pfid_kif);
472 if (dyn->pfid_kt != NULL)
473 pfr_detach_table(dyn->pfid_kt);
475 pf_remove_if_empty_ruleset(ruleset);
476 if (dyn->pfid_kif != NULL)
477 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
478 pool_put(&pfi_addr_pl, dyn);
484 pfi_kif_update(struct pfi_kif *kif)
486 struct ifg_list *ifgl;
487 struct pfi_dynaddr *p;
489 /* update all dynaddr */
490 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
491 pfi_dynaddr_update(p);
493 /* again for all groups kif is member of */
494 if (kif->pfik_ifp != NULL)
495 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next)
496 pfi_kif_update((struct pfi_kif *)
497 ifgl->ifgl_group->ifg_pf_kif);
501 pfi_dynaddr_update(struct pfi_dynaddr *dyn)
504 struct pfr_ktable *kt;
506 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL)
507 panic("pfi_dynaddr_update");
512 if (kt->pfrkt_larg != pfi_update) {
513 /* this table needs to be brought up-to-date */
514 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
515 kt->pfrkt_larg = pfi_update;
517 pfr_dynaddr_update(kt, dyn);
521 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
524 struct ifg_member *ifgm;
528 if (kif->pfik_ifp != NULL)
529 pfi_instance_add(kif->pfik_ifp, net, flags);
530 else if (kif->pfik_group != NULL)
531 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next)
532 pfi_instance_add(ifgm->ifgm_ifp, net, flags);
534 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2,
535 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
536 kprintf("pfi_table_update: cannot set %d new addresses "
537 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
541 pfi_instance_add(struct ifnet *ifp, int net, int flags)
543 struct ifaddr_container *ifac;
544 int got4 = 0, got6 = 0;
549 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
550 struct ifaddr *ia = ifac->ifa;
552 if (ia->ifa_addr == NULL)
554 af = ia->ifa_addr->sa_family;
555 if (af != AF_INET && af != AF_INET6)
558 * XXX: For point-to-point interfaces, (ifname:0) and IPv4,
559 * jump over address without a proper route to work
560 * around a problem with ppp not fully removing the
561 * address used during IPCP.
563 if ((ifp->if_flags & IFF_POINTOPOINT) &&
564 !(ia->ifa_flags & IFA_ROUTE) &&
565 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET))
567 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6)
569 if ((flags & PFI_AFLAG_BROADCAST) &&
570 !(ifp->if_flags & IFF_BROADCAST))
572 if ((flags & PFI_AFLAG_PEER) &&
573 !(ifp->if_flags & IFF_POINTOPOINT))
575 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
576 IN6_IS_ADDR_LINKLOCAL(
577 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr))
579 if (flags & PFI_AFLAG_NOALIAS) {
580 if (af == AF_INET && got4)
582 if (af == AF_INET6 && got6)
587 else if (af == AF_INET6)
590 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
592 net2 = pfi_unmask(&((struct sockaddr_in *)
593 ia->ifa_netmask)->sin_addr);
594 else if (af == AF_INET6)
595 net2 = pfi_unmask(&((struct sockaddr_in6 *)
596 ia->ifa_netmask)->sin6_addr);
598 if (af == AF_INET && net2 > 32)
600 if (flags & PFI_AFLAG_BROADCAST)
601 pfi_address_add(ia->ifa_broadaddr, af, net2);
602 else if (flags & PFI_AFLAG_PEER)
603 pfi_address_add(ia->ifa_dstaddr, af, net2);
605 pfi_address_add(ia->ifa_addr, af, net2);
610 pfi_address_add(struct sockaddr *sa, int af, int net)
615 if (pfi_buffer_cnt >= pfi_buffer_max) {
616 int new_max = pfi_buffer_max * 2;
618 if (new_max > PFI_BUFFER_MAX) {
619 kprintf("pfi_address_add: address buffer full (%d/%d)\n",
620 pfi_buffer_cnt, PFI_BUFFER_MAX);
623 p = kmalloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_WAITOK);
625 kprintf("pfi_address_add: no memory to grow buffer "
626 "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
629 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer));
630 /* no need to zero buffer */
631 kfree(pfi_buffer, PFI_MTYPE);
633 pfi_buffer_max = new_max;
635 if (af == AF_INET && net > 32)
637 p = pfi_buffer + pfi_buffer_cnt++;
638 bzero(p, sizeof(*p));
642 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr;
643 else if (af == AF_INET6) {
644 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
645 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr))
646 p->pfra_ip6addr.s6_addr16[1] = 0;
648 /* mask network address bits */
650 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
651 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++)
656 pfi_dynaddr_remove(struct pf_addr_wrap *aw)
658 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
659 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
663 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
664 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
665 aw->p.dyn->pfid_kif = NULL;
666 pfr_detach_table(aw->p.dyn->pfid_kt);
667 aw->p.dyn->pfid_kt = NULL;
668 pool_put(&pfi_addr_pl, aw->p.dyn);
674 pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
676 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
677 aw->p.dyn->pfid_kif == NULL)
679 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
683 pfi_kifaddr_update(void *v)
685 struct pfi_kif *kif = (struct pfi_kif *)v;
694 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
696 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
700 pfi_fill_oldstatus(struct pf_status *pfs)
703 struct pfi_kif_cmp key;
706 strlcpy(key.pfik_ifname, pfs->ifname, sizeof(key.pfik_ifname));
708 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key);
713 bzero(pfs->pcounters, sizeof(pfs->pcounters));
714 bzero(pfs->bcounters, sizeof(pfs->bcounters));
715 for (i = 0; i < 2; i++)
716 for (j = 0; j < 2; j++)
717 for (k = 0; k < 2; k++) {
718 pfs->pcounters[i][j][k] =
719 p->pfik_packets[i][j][k];
720 pfs->bcounters[i][j] +=
721 p->pfik_bytes[i][j][k];
727 pfi_clr_istats(const char *name)
732 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
733 if (pfi_skip_if(name, p))
735 bzero(p->pfik_packets, sizeof(p->pfik_packets));
736 bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
737 p->pfik_tzero = time_second;
745 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size)
747 struct pfi_kif *p, *nextp;
751 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
752 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
753 if (pfi_skip_if(name, p))
757 p->pfik_tzero = time_second;
758 pfi_kif_ref(p, PFI_KIF_REF_RULE);
759 if (copyout(p, buf++, sizeof(*buf))) {
760 pfi_kif_unref(p, PFI_KIF_REF_RULE);
764 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
765 pfi_kif_unref(p, PFI_KIF_REF_RULE);
774 pfi_skip_if(const char *filter, struct pfi_kif *p)
778 if (filter == NULL || !*filter)
780 if (!strcmp(p->pfik_name, filter))
781 return (0); /* exact match */
783 if (n < 1 || n >= IFNAMSIZ)
784 return (1); /* sanity check */
785 if (filter[n-1] >= '0' && filter[n-1] <= '9')
786 return (1); /* only do exact match in that case */
787 if (strncmp(p->pfik_name, filter, n))
788 return (1); /* prefix doesn't match */
789 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
793 pfi_set_flags(const char *name, int flags)
798 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
799 if (pfi_skip_if(name, p))
801 p->pfik_flags |= flags;
808 pfi_clear_flags(const char *name, int flags)
813 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
814 if (pfi_skip_if(name, p))
816 p->pfik_flags &= ~flags;
822 /* from pf_print_state.c */
824 pfi_unmask(void *addr)
826 struct pf_addr *m = addr;
827 int i = 31, j = 0, b = 0;
830 while (j < 4 && m->addr32[j] == 0xffffffff) {
835 tmp = ntohl(m->addr32[j]);
836 for (i = 31; tmp & (1 << i); --i)