1 /* $OpenBSD: pf_if.c,v 1.54 2008/06/14 16:55:28 mk 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/msgport2.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
47 #include <sys/kernel.h>
48 #include <sys/thread2.h>
52 #include <net/if_types.h>
53 #include <net/netisr2.h>
54 #include <net/netmsg2.h>
55 #include <net/route.h>
57 #include <netinet/in.h>
58 #include <netinet/in_var.h>
59 #include <netinet/in_systm.h>
60 #include <netinet/ip.h>
61 #include <netinet/ip_var.h>
63 #include <net/pf/pfvar.h>
66 #include <netinet/ip6.h>
69 struct pfi_kif *pfi_all = NULL;
70 struct pfi_ifhead pfi_ifs;
72 struct pfr_addr *pfi_buffer;
76 eventhandler_tag pfi_clone_cookie = NULL;
77 eventhandler_tag pfi_attach_cookie = NULL;
78 eventhandler_tag pfi_detach_cookie = NULL;
80 void pfi_kif_update(struct pfi_kif *);
81 void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
82 void pfi_table_update(struct pfr_ktable *, struct pfi_kif *,
84 void pfi_kifaddr_update(void *);
85 void pfi_instance_add(struct ifnet *, int, int);
86 void pfi_address_add(struct sockaddr *, int, int);
87 int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
88 int pfi_skip_if(const char *, struct pfi_kif *);
89 int pfi_unmask(void *);
90 void pfi_kifaddr_update_event(void *, struct ifnet *,
91 enum ifaddr_event, struct ifaddr *);
92 /*XXX jl void pfi_attach_clone_event(void *, struct if_clone *);*/
93 void pfi_attach_ifnet_event(void *, struct ifnet *);
94 void pfi_detach_ifnet_event(void *, struct ifnet *);
96 RB_PROTOTYPE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
97 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
99 #define PFI_BUFFER_MAX 0x10000
100 MALLOC_DEFINE(PFI_MTYPE, "pf_if", "pf interface table");
101 static MALLOC_DEFINE(M_PFIADDRPL, "pfiaddrpl", "pf interface address pool list");
109 if (pfi_all != NULL) /* already initialized */
113 pfi_buffer = kmalloc(pfi_buffer_max * sizeof(*pfi_buffer),
114 PFI_MTYPE, M_WAITOK);
116 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL)
117 panic("pfi_kif_get for pfi_all failed");
119 /* XXX ALMOST MPSAFE */
121 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
122 if (ifp->if_dunit != IF_DUNIT_NONE)
123 pfi_attach_ifnet(ifp);
126 pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_attach_event,
127 pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
128 pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_detach_event,
129 pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
130 /* XXX jl pfi_clone_cookie = EVENTHANDLER_REGISTER(if_clone_event,
131 pfi_attach_clone_event, NULL, EVENTHANDLER_PRI_ANY); */
133 if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL)
134 panic("pfi_kif_get for pfi_all failed");
140 struct pfi_kif *p, key;
143 EVENTHANDLER_DEREGISTER(ifnet_attach_event, pfi_attach_cookie);
144 EVENTHANDLER_DEREGISTER(ifnet_detach_event, pfi_detach_cookie);
145 EVENTHANDLER_DEREGISTER(if_clone_event, pfi_clone_cookie);
147 /* release PFI_IFLAG_INSTANCE */
148 /* XXX ALMOST MPSAFE */
150 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
151 strlcpy(key.pfik_name, ifp->if_xname, sizeof(key.pfik_name));
152 p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
154 pfi_detach_ifnet(ifp);
158 /* XXX clear all other interface group */
159 while ((p = RB_MIN(pfi_ifhead, &pfi_ifs))) {
160 RB_REMOVE(pfi_ifhead, &pfi_ifs, p);
164 kfree(pfi_buffer, PFI_MTYPE);
170 * Wrapper functions for FreeBSD eventhandler
173 pfi_kifaddr_update_event(void *arg, struct ifnet *ifp,
174 enum ifaddr_event event __unused, struct ifaddr *ifa __unused)
176 struct pfi_kif *p = arg;
179 * Check to see if it is 'our' interface as we do not have per
180 * interface hooks and thus get an update for every interface.
182 if (p && p->pfik_ifp == ifp)
183 pfi_kifaddr_update(p);
188 pfi_attach_clone_event(void *arg __unused, struct if_clone *ifc)
190 pfi_attach_clone(ifc);
195 pfi_attach_ifnet_event(void *arg __unused, struct ifnet *ifp)
197 if (ifp->if_dunit != IF_DUNIT_NONE)
198 pfi_attach_ifnet(ifp);
202 pfi_detach_ifnet_event(void *arg __unused, struct ifnet *ifp)
204 pfi_detach_ifnet(ifp);
208 pfi_kif_get(const char *kif_name)
211 struct pfi_kif_cmp s;
213 bzero(&s, sizeof(s));
214 strlcpy(s.pfik_ifname, kif_name, sizeof(s.pfik_ifname));
215 if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL)
219 if ((kif = kmalloc(sizeof(*kif), PFI_MTYPE, M_WAITOK | M_ZERO)) == NULL)
222 strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
223 kif->pfik_tzero = time_second;
224 TAILQ_INIT(&kif->pfik_dynaddrs);
226 RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
231 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
234 case PFI_KIF_REF_RULE:
237 case PFI_KIF_REF_STATE:
241 panic("pfi_kif_ref with unknown type");
246 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
252 case PFI_KIF_REF_NONE:
254 case PFI_KIF_REF_RULE:
255 if (kif->pfik_rules <= 0) {
256 kprintf("pfi_kif_unref: rules refcount <= 0\n");
261 case PFI_KIF_REF_STATE:
262 if (kif->pfik_states <= 0) {
263 kprintf("pfi_kif_unref: state refcount <= 0\n");
269 panic("pfi_kif_unref with unknown type");
272 if (kif->pfik_ifp != NULL || kif->pfik_group != NULL || kif == pfi_all)
275 if (kif->pfik_rules || kif->pfik_states)
278 RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
279 kfree(kif, PFI_MTYPE);
283 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
287 if (rule_kif == NULL || rule_kif == packet_kif)
290 if (rule_kif->pfik_group != NULL)
291 TAILQ_FOREACH(p, &packet_kif->pfik_ifp->if_groups, ifgl_next)
292 if (p->ifgl_group == rule_kif->pfik_group)
299 pfi_attach_ifnet(struct ifnet *ifp)
306 if ((kif = pfi_kif_get(ifp->if_xname)) == NULL)
307 panic("pfi_kif_get failed");
310 ifp->if_pf_kif = (caddr_t)kif;
318 pfi_detach_ifnet(struct ifnet *ifp)
322 if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL)
329 kif->pfik_ifp = NULL;
330 ifp->if_pf_kif = NULL;
331 pfi_kif_unref(kif, PFI_KIF_REF_NONE);
336 pfi_attach_ifgroup(struct ifg_group *ifg)
343 if ((kif = pfi_kif_get(ifg->ifg_group)) == NULL)
344 panic("pfi_kif_get failed");
346 kif->pfik_group = ifg;
347 ifg->ifg_pf_kif = (caddr_t)kif;
353 pfi_detach_ifgroup(struct ifg_group *ifg)
357 if ((kif = (struct pfi_kif *)ifg->ifg_pf_kif) == NULL)
363 kif->pfik_group = NULL;
364 ifg->ifg_pf_kif = NULL;
365 pfi_kif_unref(kif, PFI_KIF_REF_NONE);
370 pfi_group_change(const char *group)
376 if ((kif = pfi_kif_get(group)) == NULL)
377 panic("pfi_kif_get failed");
385 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
390 switch (dyn->pfid_acnt4) {
394 return (PF_MATCHA(0, &dyn->pfid_addr4,
395 &dyn->pfid_mask4, a, AF_INET));
397 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
403 switch (dyn->pfid_acnt6) {
407 return (PF_MATCHA(0, &dyn->pfid_addr6,
408 &dyn->pfid_mask6, a, AF_INET6));
410 return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
420 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
422 struct pfi_dynaddr *dyn;
423 char tblname[PF_TABLE_NAME_SIZE];
424 struct pf_ruleset *ruleset = NULL;
427 if (aw->type != PF_ADDR_DYNIFTL)
429 if ((dyn = kmalloc(sizeof(struct pfi_dynaddr), M_PFIADDRPL, M_WAITOK|M_NULLOK|M_ZERO))
434 if (!strcmp(aw->v.ifname, "self"))
435 dyn->pfid_kif = pfi_kif_get(IFG_ALL);
437 dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
438 if (dyn->pfid_kif == NULL) {
442 pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
444 dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
445 if (af == AF_INET && dyn->pfid_net == 32)
447 strlcpy(tblname, aw->v.ifname, sizeof(tblname));
448 if (aw->iflags & PFI_AFLAG_NETWORK)
449 strlcat(tblname, ":network", sizeof(tblname));
450 if (aw->iflags & PFI_AFLAG_BROADCAST)
451 strlcat(tblname, ":broadcast", sizeof(tblname));
452 if (aw->iflags & PFI_AFLAG_PEER)
453 strlcat(tblname, ":peer", sizeof(tblname));
454 if (aw->iflags & PFI_AFLAG_NOALIAS)
455 strlcat(tblname, ":0", sizeof(tblname));
456 if (dyn->pfid_net != 128)
457 ksnprintf(tblname + strlen(tblname),
458 sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
459 if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
464 if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
469 dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
470 dyn->pfid_iflags = aw->iflags;
473 TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
475 pfi_kif_update(dyn->pfid_kif);
480 if (dyn->pfid_kt != NULL)
481 pfr_detach_table(dyn->pfid_kt);
483 pf_remove_if_empty_ruleset(ruleset);
484 if (dyn->pfid_kif != NULL)
485 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
486 kfree(dyn, M_PFIADDRPL);
492 pfi_kif_update(struct pfi_kif *kif)
494 struct ifg_list *ifgl;
495 struct pfi_dynaddr *p;
497 /* update all dynaddr */
498 TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
499 pfi_dynaddr_update(p);
501 /* again for all groups kif is member of */
502 if (kif->pfik_ifp != NULL)
503 TAILQ_FOREACH(ifgl, &kif->pfik_ifp->if_groups, ifgl_next)
504 pfi_kif_update((struct pfi_kif *)
505 ifgl->ifgl_group->ifg_pf_kif);
509 pfi_dynaddr_update(struct pfi_dynaddr *dyn)
512 struct pfr_ktable *kt;
514 if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL)
515 panic("pfi_dynaddr_update");
520 if (kt->pfrkt_larg != pfi_update) {
521 /* this table needs to be brought up-to-date */
522 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
523 kt->pfrkt_larg = pfi_update;
525 pfr_dynaddr_update(kt, dyn);
529 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
532 struct ifg_member *ifgm;
536 if (kif->pfik_ifp != NULL)
537 pfi_instance_add(kif->pfik_ifp, net, flags);
538 else if (kif->pfik_group != NULL)
539 TAILQ_FOREACH(ifgm, &kif->pfik_group->ifg_members, ifgm_next)
540 pfi_instance_add(ifgm->ifgm_ifp, net, flags);
542 if ((e = pfr_set_addrs(&kt->pfrkt_t, pfi_buffer, pfi_buffer_cnt, &size2,
543 NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
544 kprintf("pfi_table_update: cannot set %d new addresses "
545 "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
548 struct netmsg_pfiadd {
549 struct netmsg_base base;
556 pfi_instance_add_dispatch(netmsg_t nmsg)
558 struct netmsg_pfiadd *msg = (struct netmsg_pfiadd *)nmsg;
559 struct ifaddr_container *ifac;
560 int got4 = 0, got6 = 0;
562 struct ifnet *ifp = msg->ifp;
563 int net = msg->net, flags = msg->flags;
568 * The ifaddr processing in the following loop will block,
569 * however, this function is called in netisr0, in which
570 * ifaddr list changes happen, so we don't care about the
571 * blockness of the ifaddr processing here.
573 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
574 struct ifaddr *ia = ifac->ifa;
576 if (ia->ifa_addr == NULL)
578 af = ia->ifa_addr->sa_family;
579 if (af != AF_INET && af != AF_INET6)
582 * XXX: For point-to-point interfaces, (ifname:0) and IPv4,
583 * jump over address without a proper route to work
584 * around a problem with ppp not fully removing the
585 * address used during IPCP.
587 if ((ifp->if_flags & IFF_POINTOPOINT) &&
588 !(ia->ifa_flags & IFA_ROUTE) &&
589 (flags & PFI_AFLAG_NOALIAS) && (af == AF_INET))
591 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6)
593 if ((flags & PFI_AFLAG_BROADCAST) &&
594 !(ifp->if_flags & IFF_BROADCAST))
596 if ((flags & PFI_AFLAG_PEER) &&
597 !(ifp->if_flags & IFF_POINTOPOINT))
599 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
600 IN6_IS_ADDR_LINKLOCAL(
601 &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr))
603 if (flags & PFI_AFLAG_NOALIAS) {
604 if (af == AF_INET && got4)
606 if (af == AF_INET6 && got6)
611 else if (af == AF_INET6)
614 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
616 net2 = pfi_unmask(&((struct sockaddr_in *)
617 ia->ifa_netmask)->sin_addr);
618 else if (af == AF_INET6)
619 net2 = pfi_unmask(&((struct sockaddr_in6 *)
620 ia->ifa_netmask)->sin6_addr);
622 if (af == AF_INET && net2 > 32)
624 if (flags & PFI_AFLAG_BROADCAST)
625 pfi_address_add(ia->ifa_broadaddr, af, net2);
626 else if (flags & PFI_AFLAG_PEER)
627 pfi_address_add(ia->ifa_dstaddr, af, net2);
629 pfi_address_add(ia->ifa_addr, af, net2);
632 netisr_replymsg(&nmsg->base, 0);
636 pfi_instance_add(struct ifnet *ifp, int net, int flags)
638 struct netmsg_pfiadd msg;
640 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
641 pfi_instance_add_dispatch);
645 netisr_domsg(&msg.base, 0);
649 pfi_address_add(struct sockaddr *sa, int af, int net)
654 if (pfi_buffer_cnt >= pfi_buffer_max) {
655 int new_max = pfi_buffer_max * 2;
657 if (new_max > PFI_BUFFER_MAX) {
658 kprintf("pfi_address_add: address buffer full (%d/%d)\n",
659 pfi_buffer_cnt, PFI_BUFFER_MAX);
662 p = kmalloc(new_max * sizeof(*pfi_buffer), PFI_MTYPE, M_WAITOK);
663 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer));
664 /* no need to zero buffer */
665 kfree(pfi_buffer, PFI_MTYPE);
667 pfi_buffer_max = new_max;
669 if (af == AF_INET && net > 32)
671 p = pfi_buffer + pfi_buffer_cnt++;
672 bzero(p, sizeof(*p));
676 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr;
677 else if (af == AF_INET6) {
678 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
679 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr))
680 p->pfra_ip6addr.s6_addr16[1] = 0;
682 /* mask network address bits */
684 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
685 for (i = (p->pfra_net+7)/8; i < sizeof(p->pfra_u); i++)
690 pfi_dynaddr_remove(struct pf_addr_wrap *aw)
692 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
693 aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
697 TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
698 pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
699 aw->p.dyn->pfid_kif = NULL;
700 pfr_detach_table(aw->p.dyn->pfid_kt);
701 aw->p.dyn->pfid_kt = NULL;
702 kfree(aw->p.dyn, M_PFIADDRPL);
708 pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
710 if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
711 aw->p.dyn->pfid_kif == NULL)
713 aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
717 pfi_kifaddr_update(void *v)
719 struct pfi_kif *kif = (struct pfi_kif *)v;
728 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
730 return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
734 pfi_update_status(const char *name, struct pf_status *pfs)
737 struct pfi_kif_cmp key;
738 struct ifg_member p_member, *ifgm;
739 TAILQ_HEAD(, ifg_member) ifg_members;
742 strlcpy(key.pfik_ifname, name, sizeof(key.pfik_ifname));
744 p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key);
749 if (p->pfik_group != NULL) {
750 bcopy(&p->pfik_group->ifg_members, &ifg_members,
751 sizeof(ifg_members));
753 /* build a temporary list for p only */
754 bzero(&p_member, sizeof(p_member));
755 p_member.ifgm_ifp = p->pfik_ifp;
756 TAILQ_INIT(&ifg_members);
757 TAILQ_INSERT_TAIL(&ifg_members, &p_member, ifgm_next);
760 bzero(pfs->pcounters, sizeof(pfs->pcounters));
761 bzero(pfs->bcounters, sizeof(pfs->bcounters));
763 TAILQ_FOREACH(ifgm, &ifg_members, ifgm_next) {
764 if (ifgm->ifgm_ifp == NULL)
766 p = (struct pfi_kif *)ifgm->ifgm_ifp->if_pf_kif;
768 /* just clear statistics */
770 bzero(p->pfik_packets, sizeof(p->pfik_packets));
771 bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
772 p->pfik_tzero = time_second;
775 for (i = 0; i < 2; i++)
776 for (j = 0; j < 2; j++)
777 for (k = 0; k < 2; k++) {
778 pfs->pcounters[i][j][k] +=
779 p->pfik_packets[i][j][k];
780 pfs->bcounters[i][j] +=
781 p->pfik_bytes[i][j][k];
788 pfi_get_ifaces(const char *name, struct pfi_kif *buf, int *size)
790 struct pfi_kif *p, *nextp;
794 for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
795 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
796 if (pfi_skip_if(name, p))
800 p->pfik_tzero = time_second;
801 pfi_kif_ref(p, PFI_KIF_REF_RULE);
802 if (copyout(p, buf++, sizeof(*buf))) {
803 pfi_kif_unref(p, PFI_KIF_REF_RULE);
807 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
808 pfi_kif_unref(p, PFI_KIF_REF_RULE);
817 pfi_skip_if(const char *filter, struct pfi_kif *p)
821 if (filter == NULL || !*filter)
823 if (!strcmp(p->pfik_name, filter))
824 return (0); /* exact match */
826 if (n < 1 || n >= IFNAMSIZ)
827 return (1); /* sanity check */
828 if (filter[n-1] >= '0' && filter[n-1] <= '9')
829 return (1); /* only do exact match in that case */
830 if (strncmp(p->pfik_name, filter, n))
831 return (1); /* prefix doesn't match */
832 return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
836 pfi_set_flags(const char *name, int flags)
841 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
842 if (pfi_skip_if(name, p))
844 p->pfik_flags |= flags;
851 pfi_clear_flags(const char *name, int flags)
856 RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
857 if (pfi_skip_if(name, p))
859 p->pfik_flags &= ~flags;
865 /* from pf_print_state.c */
867 pfi_unmask(void *addr)
869 struct pf_addr *m = addr;
870 int i = 31, j = 0, b = 0;
873 while (j < 4 && m->addr32[j] == 0xffffffff) {
878 tmp = ntohl(m->addr32[j]);
879 for (i = 31; tmp & (1 << i); --i)