bsd/net/pf_if.c

   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
  90 struct pfi_kif                  *pfi_all = NULL;
  91
  92 static struct pool              pfi_addr_pl;
  93 static struct pfi_ifhead        pfi_ifs;
  94 static u_int32_t                pfi_update = 1;
  95 static struct pfr_addr          *pfi_buffer;
  96 static int                      pfi_buffer_cnt;
  97 static int                      pfi_buffer_max;
  98
  99 __private_extern__ void pfi_kifaddr_update(void *);
 100
 101 static void pfi_kif_update(struct pfi_kif *);
 102 static void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
 103 static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, int, int);
 104 static void pfi_instance_add(struct ifnet *, int, int);
 105 static void pfi_address_add(struct sockaddr *, int, int);
 106 static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
 107 static int pfi_skip_if(const char *, struct pfi_kif *);
 108 static int pfi_unmask(void *);
 109
 110 RB_PROTOTYPE_SC(static, pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
 111 RB_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
 118 void
 119 pfi_initialize(void)
 120 {
 121         if (pfi_all != NULL) {  /* already initialized */
 122                 return;
 123         }
 124
 125         pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0,
 126             "pfiaddrpl", NULL);
 127         pfi_buffer_max = 64;
 128         pfi_buffer = _MALLOC(pfi_buffer_max * sizeof(*pfi_buffer),
 129             PFI_MTYPE, M_WAITOK);
 130
 131         if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) {
 132                 panic("pfi_kif_get for pfi_all failed");
 133         }
 134 }
 135
 136 #if 0
 137 void
 138 pfi_destroy(void)
 139 {
 140         pool_destroy(&pfi_addr_pl);
 141         _FREE(pfi_buffer, PFI_MTYPE);
 142 }
 143 #endif
 144
 145 struct pfi_kif *
 146 pfi_kif_get(const char *kif_name)
 147 {
 148         struct pfi_kif          *kif;
 149         struct pfi_kif_cmp       s;
 150
 151         bzero(&s, sizeof(s));
 152         strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name));
 153         if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs,
 154             (struct pfi_kif *)(void *)&s)) != NULL) {
 155                 return kif;
 156         }
 157
 158         /* create new one */
 159         if ((kif = _MALLOC(sizeof(*kif), PFI_MTYPE, M_WAITOK | M_ZERO)) == NULL) {
 160                 return NULL;
 161         }
 162
 163         strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
 164         kif->pfik_tzero = pf_calendar_time_second();
 165         TAILQ_INIT(&kif->pfik_dynaddrs);
 166
 167         RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
 168         return kif;
 169 }
 170
 171 void
 172 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
 173 {
 174         switch (what) {
 175         case PFI_KIF_REF_RULE:
 176                 kif->pfik_rules++;
 177                 break;
 178         case PFI_KIF_REF_STATE:
 179                 kif->pfik_states++;
 180                 break;
 181         default:
 182                 panic("pfi_kif_ref with unknown type");
 183         }
 184 }
 185
 186 void
 187 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
 188 {
 189         if (kif == NULL) {
 190                 return;
 191         }
 192
 193         switch (what) {
 194         case PFI_KIF_REF_NONE:
 195                 break;
 196         case PFI_KIF_REF_RULE:
 197                 if (kif->pfik_rules <= 0) {
 198                         printf("pfi_kif_unref: rules refcount <= 0\n");
 199                         return;
 200                 }
 201                 kif->pfik_rules--;
 202                 break;
 203         case PFI_KIF_REF_STATE:
 204                 if (kif->pfik_states <= 0) {
 205                         printf("pfi_kif_unref: state refcount <= 0\n");
 206                         return;
 207                 }
 208                 kif->pfik_states--;
 209                 break;
 210         default:
 211                 panic("pfi_kif_unref with unknown type");
 212         }
 213
 214         if (kif->pfik_ifp != NULL || kif == pfi_all) {
 215                 return;
 216         }
 217
 218         if (kif->pfik_rules || kif->pfik_states) {
 219                 return;
 220         }
 221
 222         RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
 223         _FREE(kif, PFI_MTYPE);
 224 }
 225
 226 int
 227 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
 228 {
 229         if (rule_kif == NULL || rule_kif == packet_kif) {
 230                 return 1;
 231         }
 232
 233         return 0;
 234 }
 235
 236 void
 237 pfi_attach_ifnet(struct ifnet *ifp)
 238 {
 239         struct pfi_kif *kif;
 240
 241         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 242
 243         pfi_update++;
 244         if ((kif = pfi_kif_get(if_name(ifp))) == NULL) {
 245                 panic("pfi_kif_get failed");
 246         }
 247
 248         ifnet_lock_exclusive(ifp);
 249         kif->pfik_ifp = ifp;
 250         ifp->if_pf_kif = kif;
 251         ifnet_lock_done(ifp);
 252
 253         pfi_kif_update(kif);
 254 }
 255
 256 /*
 257  * Caller holds ifnet lock as writer (exclusive);
 258  */
 259 void
 260 pfi_detach_ifnet(struct ifnet *ifp)
 261 {
 262         struct pfi_kif          *kif;
 263
 264         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 265
 266         if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) {
 267                 return;
 268         }
 269
 270         pfi_update++;
 271         pfi_kif_update(kif);
 272
 273         ifnet_lock_exclusive(ifp);
 274         kif->pfik_ifp = NULL;
 275         ifp->if_pf_kif = NULL;
 276         ifnet_lock_done(ifp);
 277
 278         pfi_kif_unref(kif, PFI_KIF_REF_NONE);
 279 }
 280
 281 int
 282 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
 283 {
 284         switch (af) {
 285 #if INET
 286         case AF_INET:
 287                 switch (dyn->pfid_acnt4) {
 288                 case 0:
 289                         return 0;
 290                 case 1:
 291                         return PF_MATCHA(0, &dyn->pfid_addr4,
 292                                    &dyn->pfid_mask4, a, AF_INET);
 293                 default:
 294                         return pfr_match_addr(dyn->pfid_kt, a, AF_INET);
 295                 }
 296 #endif /* INET */
 297 #if INET6
 298         case AF_INET6:
 299                 switch (dyn->pfid_acnt6) {
 300                 case 0:
 301                         return 0;
 302                 case 1:
 303                         return PF_MATCHA(0, &dyn->pfid_addr6,
 304                                    &dyn->pfid_mask6, a, AF_INET6);
 305                 default:
 306                         return pfr_match_addr(dyn->pfid_kt, a, AF_INET6);
 307                 }
 308 #endif /* INET6 */
 309         default:
 310                 return 0;
 311         }
 312 }
 313
 314 int
 315 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
 316 {
 317         struct pfi_dynaddr      *dyn;
 318         char                     tblname[PF_TABLE_NAME_SIZE];
 319         struct pf_ruleset       *ruleset = NULL;
 320         int                      rv = 0;
 321
 322         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 323
 324         if (aw->type != PF_ADDR_DYNIFTL) {
 325                 return 0;
 326         }
 327         if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK)) == NULL) {
 328                 return 1;
 329         }
 330         bzero(dyn, sizeof(*dyn));
 331
 332         if (strcmp(aw->v.ifname, "self") == 0) {
 333                 dyn->pfid_kif = pfi_kif_get(IFG_ALL);
 334         } else {
 335                 dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
 336         }
 337         if (dyn->pfid_kif == NULL) {
 338                 rv = 1;
 339                 goto _bad;
 340         }
 341         pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 342
 343         dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
 344         if (af == AF_INET && dyn->pfid_net == 32) {
 345                 dyn->pfid_net = 128;
 346         }
 347         strlcpy(tblname, aw->v.ifname, sizeof(tblname));
 348         if (aw->iflags & PFI_AFLAG_NETWORK) {
 349                 strlcat(tblname, ":network", sizeof(tblname));
 350         }
 351         if (aw->iflags & PFI_AFLAG_BROADCAST) {
 352                 strlcat(tblname, ":broadcast", sizeof(tblname));
 353         }
 354         if (aw->iflags & PFI_AFLAG_PEER) {
 355                 strlcat(tblname, ":peer", sizeof(tblname));
 356         }
 357         if (aw->iflags & PFI_AFLAG_NOALIAS) {
 358                 strlcat(tblname, ":0", sizeof(tblname));
 359         }
 360         if (dyn->pfid_net != 128) {
 361                 snprintf(tblname + strlen(tblname),
 362                     sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
 363         }
 364         if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
 365                 rv = 1;
 366                 goto _bad;
 367         }
 368
 369         if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
 370                 rv = 1;
 371                 goto _bad;
 372         }
 373
 374         dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
 375         dyn->pfid_iflags = aw->iflags;
 376         dyn->pfid_af = af;
 377
 378         TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
 379         aw->p.dyn = dyn;
 380         pfi_kif_update(dyn->pfid_kif);
 381         return 0;
 382
 383 _bad:
 384         if (dyn->pfid_kt != NULL) {
 385                 pfr_detach_table(dyn->pfid_kt);
 386         }
 387         if (ruleset != NULL) {
 388                 pf_remove_if_empty_ruleset(ruleset);
 389         }
 390         if (dyn->pfid_kif != NULL) {
 391                 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 392         }
 393         pool_put(&pfi_addr_pl, dyn);
 394         return rv;
 395 }
 396
 397 void
 398 pfi_kif_update(struct pfi_kif *kif)
 399 {
 400         struct pfi_dynaddr      *p;
 401
 402         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 403
 404         /* update all dynaddr */
 405         TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
 406         pfi_dynaddr_update(p);
 407 }
 408
 409 void
 410 pfi_dynaddr_update(struct pfi_dynaddr *dyn)
 411 {
 412         struct pfi_kif          *kif;
 413         struct pfr_ktable       *kt;
 414
 415         if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) {
 416                 panic("pfi_dynaddr_update");
 417         }
 418
 419         kif = dyn->pfid_kif;
 420         kt = dyn->pfid_kt;
 421
 422         if (kt->pfrkt_larg != pfi_update) {
 423                 /* this table needs to be brought up-to-date */
 424                 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
 425                 kt->pfrkt_larg = pfi_update;
 426         }
 427         pfr_dynaddr_update(kt, dyn);
 428 }
 429
 430 void
 431 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
 432 {
 433         int                      e, size2 = 0;
 434
 435         pfi_buffer_cnt = 0;
 436
 437         if (kif->pfik_ifp != NULL) {
 438                 pfi_instance_add(kif->pfik_ifp, net, flags);
 439         }
 440
 441         if ((e = pfr_set_addrs(&kt->pfrkt_t, CAST_USER_ADDR_T(pfi_buffer),
 442             pfi_buffer_cnt, &size2, NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) {
 443                 printf("pfi_table_update: cannot set %d new addresses "
 444                     "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
 445         }
 446 }
 447
 448 void
 449 pfi_instance_add(struct ifnet *ifp, int net, int flags)
 450 {
 451         struct ifaddr   *ia;
 452         int              got4 = 0, got6 = 0;
 453         int              net2, af;
 454
 455         if (ifp == NULL) {
 456                 return;
 457         }
 458         ifnet_lock_shared(ifp);
 459         TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) {
 460                 IFA_LOCK(ia);
 461                 if (ia->ifa_addr == NULL) {
 462                         IFA_UNLOCK(ia);
 463                         continue;
 464                 }
 465                 af = ia->ifa_addr->sa_family;
 466                 if (af != AF_INET && af != AF_INET6) {
 467                         IFA_UNLOCK(ia);
 468                         continue;
 469                 }
 470                 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) {
 471                         IFA_UNLOCK(ia);
 472                         continue;
 473                 }
 474                 if ((flags & PFI_AFLAG_BROADCAST) &&
 475                     !(ifp->if_flags & IFF_BROADCAST)) {
 476                         IFA_UNLOCK(ia);
 477                         continue;
 478                 }
 479                 if ((flags & PFI_AFLAG_PEER) &&
 480                     !(ifp->if_flags & IFF_POINTOPOINT)) {
 481                         IFA_UNLOCK(ia);
 482                         continue;
 483                 }
 484                 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
 485                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
 486                     (void *)ia->ifa_addr)->sin6_addr)) {
 487                         IFA_UNLOCK(ia);
 488                         continue;
 489                 }
 490                 if (flags & PFI_AFLAG_NOALIAS) {
 491                         if (af == AF_INET && got4) {
 492                                 IFA_UNLOCK(ia);
 493                                 continue;
 494                         }
 495                         if (af == AF_INET6 && got6) {
 496                                 IFA_UNLOCK(ia);
 497                                 continue;
 498                         }
 499                 }
 500                 if (af == AF_INET) {
 501                         got4 = 1;
 502                 } else if (af == AF_INET6) {
 503                         got6 = 1;
 504                 }
 505                 net2 = net;
 506                 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
 507                         if (af == AF_INET) {
 508                                 net2 = pfi_unmask(&((struct sockaddr_in *)
 509                                     (void *)ia->ifa_netmask)->sin_addr);
 510                         } else if (af == AF_INET6) {
 511                                 net2 = pfi_unmask(&((struct sockaddr_in6 *)
 512                                     (void *)ia->ifa_netmask)->sin6_addr);
 513                         }
 514                 }
 515                 if (af == AF_INET && net2 > 32) {
 516                         net2 = 32;
 517                 }
 518                 if (flags & PFI_AFLAG_BROADCAST) {
 519                         pfi_address_add(ia->ifa_broadaddr, af, net2);
 520                 } else if (flags & PFI_AFLAG_PEER) {
 521                         pfi_address_add(ia->ifa_dstaddr, af, net2);
 522                 } else {
 523                         pfi_address_add(ia->ifa_addr, af, net2);
 524                 }
 525                 IFA_UNLOCK(ia);
 526         }
 527         ifnet_lock_done(ifp);
 528 }
 529
 530 void
 531 pfi_address_add(struct sockaddr *sa, int af, int net)
 532 {
 533         struct pfr_addr *p;
 534         int              i;
 535
 536         if (pfi_buffer_cnt >= pfi_buffer_max) {
 537                 int              new_max = pfi_buffer_max * 2;
 538
 539                 if (new_max > PFI_BUFFER_MAX) {
 540                         printf("pfi_address_add: address buffer full (%d/%d)\n",
 541                             pfi_buffer_cnt, PFI_BUFFER_MAX);
 542                         return;
 543                 }
 544                 p = _MALLOC(new_max * sizeof(*pfi_buffer), PFI_MTYPE,
 545                     M_WAITOK);
 546                 if (p == NULL) {
 547                         printf("pfi_address_add: no memory to grow buffer "
 548                             "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
 549                         return;
 550                 }
 551                 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof(*pfi_buffer));
 552                 /* no need to zero buffer */
 553                 _FREE(pfi_buffer, PFI_MTYPE);
 554                 pfi_buffer = p;
 555                 pfi_buffer_max = new_max;
 556         }
 557         if (af == AF_INET && net > 32) {
 558                 net = 128;
 559         }
 560         p = pfi_buffer + pfi_buffer_cnt++;
 561         bzero(p, sizeof(*p));
 562         p->pfra_af = af;
 563         p->pfra_net = net;
 564         if (af == AF_INET) {
 565                 p->pfra_ip4addr = ((struct sockaddr_in *)(void *)sa)->sin_addr;
 566         } else if (af == AF_INET6) {
 567                 p->pfra_ip6addr =
 568                     ((struct sockaddr_in6 *)(void *)sa)->sin6_addr;
 569                 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) {
 570                         p->pfra_ip6addr.s6_addr16[1] = 0;
 571                 }
 572         }
 573         /* mask network address bits */
 574         if (net < 128) {
 575                 ((caddr_t)p)[p->pfra_net / 8] &= ~(0xFF >> (p->pfra_net % 8));
 576         }
 577         for (i = (p->pfra_net + 7) / 8; i < (int)sizeof(p->pfra_u); i++) {
 578                 ((caddr_t)p)[i] = 0;
 579         }
 580 }
 581
 582 void
 583 pfi_dynaddr_remove(struct pf_addr_wrap *aw)
 584 {
 585         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 586             aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) {
 587                 return;
 588         }
 589
 590         TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
 591         pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
 592         aw->p.dyn->pfid_kif = NULL;
 593         pfr_detach_table(aw->p.dyn->pfid_kt);
 594         aw->p.dyn->pfid_kt = NULL;
 595         pool_put(&pfi_addr_pl, aw->p.dyn);
 596         aw->p.dyn = NULL;
 597 }
 598
 599 void
 600 pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
 601 {
 602         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 603             aw->p.dyn->pfid_kif == NULL) {
 604                 return;
 605         }
 606         aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
 607 }
 608
 609 void
 610 pfi_kifaddr_update(void *v)
 611 {
 612         struct pfi_kif          *kif = (struct pfi_kif *)v;
 613
 614         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 615
 616         pfi_update++;
 617         pfi_kif_update(kif);
 618 }
 619
 620 int
 621 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
 622 {
 623         return strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ);
 624 }
 625
 626 void
 627 pfi_update_status(const char *name, struct pf_status *pfs)
 628 {
 629         struct pfi_kif          *p;
 630         struct pfi_kif_cmp       key;
 631         int                      i, j, k;
 632
 633         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 634
 635         strlcpy(key.pfik_name, name, sizeof(key.pfik_name));
 636         p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)(void *)&key);
 637         if (p == NULL) {
 638                 return;
 639         }
 640
 641         if (pfs != NULL) {
 642                 bzero(pfs->pcounters, sizeof(pfs->pcounters));
 643                 bzero(pfs->bcounters, sizeof(pfs->bcounters));
 644                 for (i = 0; i < 2; i++) {
 645                         for (j = 0; j < 2; j++) {
 646                                 for (k = 0; k < 2; k++) {
 647                                         pfs->pcounters[i][j][k] +=
 648                                             p->pfik_packets[i][j][k];
 649                                         pfs->bcounters[i][j] +=
 650                                             p->pfik_bytes[i][j][k];
 651                                 }
 652                         }
 653                 }
 654         } else {
 655                 /* just clear statistics */
 656                 bzero(p->pfik_packets, sizeof(p->pfik_packets));
 657                 bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
 658                 p->pfik_tzero = pf_calendar_time_second();
 659         }
 660 }
 661
 662 int
 663 pfi_get_ifaces(const char *name, user_addr_t buf, int *size)
 664 {
 665         struct pfi_kif   *p, *nextp;
 666         int              n = 0;
 667
 668         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 669
 670         for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
 671                 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 672                 if (pfi_skip_if(name, p)) {
 673                         continue;
 674                 }
 675                 if (*size > n++) {
 676                         struct pfi_uif u;
 677
 678                         if (!p->pfik_tzero) {
 679                                 p->pfik_tzero = pf_calendar_time_second();
 680                         }
 681                         pfi_kif_ref(p, PFI_KIF_REF_RULE);
 682
 683                         /* return the user space version of pfi_kif */
 684                         bzero(&u, sizeof(u));
 685                         bcopy(p->pfik_name, &u.pfik_name, sizeof(u.pfik_name));
 686                         bcopy(p->pfik_packets, &u.pfik_packets,
 687                             sizeof(u.pfik_packets));
 688                         bcopy(p->pfik_bytes, &u.pfik_bytes,
 689                             sizeof(u.pfik_bytes));
 690                         u.pfik_tzero = p->pfik_tzero;
 691                         u.pfik_flags = p->pfik_flags;
 692                         u.pfik_states = p->pfik_states;
 693                         u.pfik_rules = p->pfik_rules;
 694
 695                         if (copyout(&u, buf, sizeof(u))) {
 696                                 pfi_kif_unref(p, PFI_KIF_REF_RULE);
 697                                 return EFAULT;
 698                         }
 699                         buf += sizeof(u);
 700                         nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 701                         pfi_kif_unref(p, PFI_KIF_REF_RULE);
 702                 }
 703         }
 704         *size = n;
 705         return 0;
 706 }
 707
 708 int
 709 pfi_skip_if(const char *filter, struct pfi_kif *p)
 710 {
 711         int     n;
 712
 713         if (filter == NULL || !*filter) {
 714                 return 0;
 715         }
 716         if (strcmp(p->pfik_name, filter) == 0) {
 717                 return 0;     /* exact match */
 718         }
 719         n = strlen(filter);
 720         if (n < 1 || n >= IFNAMSIZ) {
 721                 return 1;     /* sanity check */
 722         }
 723         if (filter[n - 1] >= '0' && filter[n - 1] <= '9') {
 724                 return 1;     /* only do exact match in that case */
 725         }
 726         if (strncmp(p->pfik_name, filter, n)) {
 727                 return 1;     /* prefix doesn't match */
 728         }
 729         return p->pfik_name[n] < '0' || p->pfik_name[n] > '9';
 730 }
 731
 732 int
 733 pfi_set_flags(const char *name, int flags)
 734 {
 735         struct pfi_kif  *p;
 736
 737         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 738
 739         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 740                 if (pfi_skip_if(name, p)) {
 741                         continue;
 742                 }
 743                 p->pfik_flags |= flags;
 744         }
 745         return 0;
 746 }
 747
 748 int
 749 pfi_clear_flags(const char *name, int flags)
 750 {
 751         struct pfi_kif  *p;
 752
 753         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 754
 755         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 756                 if (pfi_skip_if(name, p)) {
 757                         continue;
 758                 }
 759                 p->pfik_flags &= ~flags;
 760         }
 761         return 0;
 762 }
 763
 764 /* from pf_print_state.c */
 765 int
 766 pfi_unmask(void *addr)
 767 {
 768         struct pf_addr *m = addr;
 769         int i = 31, j = 0, b = 0;
 770         u_int32_t tmp;
 771
 772         while (j < 4 && m->addr32[j] == 0xffffffff) {
 773                 b += 32;
 774                 j++;
 775         }
 776         if (j < 4) {
 777                 tmp = ntohl(m->addr32[j]);
 778                 for (i = 31; tmp & (1 << i); --i) {
 779                         b++;
 780                 }
 781         }
 782         return b;
 783 }