bsd/net/pf_if.c

   1 /*
   2  * Copyright (c) 2007-2009 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         pool_init(&pfi_addr_pl, sizeof (struct pfi_dynaddr), 0, 0, 0,
 125             "pfiaddrpl", NULL);
 126         pfi_buffer_max = 64;
 127         pfi_buffer = _MALLOC(pfi_buffer_max * sizeof (*pfi_buffer),
 128             PFI_MTYPE, M_WAITOK);
 129
 130         if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL)
 131                 panic("pfi_kif_get for pfi_all failed");
 132 }
 133
 134 #if 0
 135 void
 136 pfi_destroy(void)
 137 {
 138         pool_destroy(&pfi_addr_pl);
 139         _FREE(pfi_buffer, PFI_MTYPE);
 140 }
 141 #endif
 142
 143 struct pfi_kif *
 144 pfi_kif_get(const char *kif_name)
 145 {
 146         struct pfi_kif          *kif;
 147         struct pfi_kif_cmp       s;
 148
 149         bzero(&s, sizeof (s));
 150         strlcpy(s.pfik_name, kif_name, sizeof (s.pfik_name));
 151         if ((kif = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&s)) != NULL)
 152                 return (kif);
 153
 154         /* create new one */
 155         if ((kif = _MALLOC(sizeof (*kif), PFI_MTYPE, M_WAITOK|M_ZERO)) == NULL)
 156                 return (NULL);
 157
 158         strlcpy(kif->pfik_name, kif_name, sizeof (kif->pfik_name));
 159         kif->pfik_tzero = pf_calendar_time_second();
 160         TAILQ_INIT(&kif->pfik_dynaddrs);
 161
 162         RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
 163         return (kif);
 164 }
 165
 166 void
 167 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
 168 {
 169         switch (what) {
 170         case PFI_KIF_REF_RULE:
 171                 kif->pfik_rules++;
 172                 break;
 173         case PFI_KIF_REF_STATE:
 174                 kif->pfik_states++;
 175                 break;
 176         default:
 177                 panic("pfi_kif_ref with unknown type");
 178         }
 179 }
 180
 181 void
 182 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
 183 {
 184         if (kif == NULL)
 185                 return;
 186
 187         switch (what) {
 188         case PFI_KIF_REF_NONE:
 189                 break;
 190         case PFI_KIF_REF_RULE:
 191                 if (kif->pfik_rules <= 0) {
 192                         printf("pfi_kif_unref: rules refcount <= 0\n");
 193                         return;
 194                 }
 195                 kif->pfik_rules--;
 196                 break;
 197         case PFI_KIF_REF_STATE:
 198                 if (kif->pfik_states <= 0) {
 199                         printf("pfi_kif_unref: state refcount <= 0\n");
 200                         return;
 201                 }
 202                 kif->pfik_states--;
 203                 break;
 204         default:
 205                 panic("pfi_kif_unref with unknown type");
 206         }
 207
 208         if (kif->pfik_ifp != NULL || kif == pfi_all)
 209                 return;
 210
 211         if (kif->pfik_rules || kif->pfik_states)
 212                 return;
 213
 214         RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
 215         _FREE(kif, PFI_MTYPE);
 216 }
 217
 218 int
 219 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
 220 {
 221
 222         if (rule_kif == NULL || rule_kif == packet_kif)
 223                 return (1);
 224
 225         return (0);
 226 }
 227
 228 void
 229 pfi_attach_ifnet(struct ifnet *ifp)
 230 {
 231         struct pfi_kif *kif;
 232         char if_name[IFNAMSIZ];
 233
 234         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 235
 236         pfi_update++;
 237         (void) snprintf(if_name, sizeof (if_name), "%s%d",
 238             ifp->if_name, ifp->if_unit);
 239         if ((kif = pfi_kif_get(if_name)) == NULL)
 240                 panic("pfi_kif_get failed");
 241
 242         ifnet_lock_exclusive(ifp);
 243         kif->pfik_ifp = ifp;
 244         ifp->if_pf_kif = kif;
 245         ifnet_lock_done(ifp);
 246
 247         pfi_kif_update(kif);
 248 }
 249
 250 /*
 251  * Caller holds ifnet lock as writer (exclusive);
 252  */
 253 void
 254 pfi_detach_ifnet(struct ifnet *ifp)
 255 {
 256         struct pfi_kif          *kif;
 257
 258         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 259
 260         if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL)
 261                 return;
 262
 263         pfi_update++;
 264         pfi_kif_update(kif);
 265
 266         ifnet_lock_exclusive(ifp);
 267         kif->pfik_ifp = NULL;
 268         ifp->if_pf_kif = NULL;
 269         ifnet_lock_done(ifp);
 270
 271         pfi_kif_unref(kif, PFI_KIF_REF_NONE);
 272 }
 273
 274 int
 275 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
 276 {
 277         switch (af) {
 278 #if INET
 279         case AF_INET:
 280                 switch (dyn->pfid_acnt4) {
 281                 case 0:
 282                         return (0);
 283                 case 1:
 284                         return (PF_MATCHA(0, &dyn->pfid_addr4,
 285                             &dyn->pfid_mask4, a, AF_INET));
 286                 default:
 287                         return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
 288                 }
 289                 break;
 290 #endif /* INET */
 291 #if INET6
 292         case AF_INET6:
 293                 switch (dyn->pfid_acnt6) {
 294                 case 0:
 295                         return (0);
 296                 case 1:
 297                         return (PF_MATCHA(0, &dyn->pfid_addr6,
 298                             &dyn->pfid_mask6, a, AF_INET6));
 299                 default:
 300                         return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
 301                 }
 302                 break;
 303 #endif /* INET6 */
 304         default:
 305                 return (0);
 306         }
 307 }
 308
 309 int
 310 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
 311 {
 312         struct pfi_dynaddr      *dyn;
 313         char                     tblname[PF_TABLE_NAME_SIZE];
 314         struct pf_ruleset       *ruleset = NULL;
 315         int                      rv = 0;
 316
 317         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 318
 319         if (aw->type != PF_ADDR_DYNIFTL)
 320                 return (0);
 321         if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK)) == NULL)
 322                 return (1);
 323         bzero(dyn, sizeof (*dyn));
 324
 325         if (strcmp(aw->v.ifname, "self") == 0)
 326                 dyn->pfid_kif = pfi_kif_get(IFG_ALL);
 327         else
 328                 dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
 329         if (dyn->pfid_kif == NULL) {
 330                 rv = 1;
 331                 goto _bad;
 332         }
 333         pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 334
 335         dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
 336         if (af == AF_INET && dyn->pfid_net == 32)
 337                 dyn->pfid_net = 128;
 338         strlcpy(tblname, aw->v.ifname, sizeof (tblname));
 339         if (aw->iflags & PFI_AFLAG_NETWORK)
 340                 strlcat(tblname, ":network", sizeof (tblname));
 341         if (aw->iflags & PFI_AFLAG_BROADCAST)
 342                 strlcat(tblname, ":broadcast", sizeof (tblname));
 343         if (aw->iflags & PFI_AFLAG_PEER)
 344                 strlcat(tblname, ":peer", sizeof (tblname));
 345         if (aw->iflags & PFI_AFLAG_NOALIAS)
 346                 strlcat(tblname, ":0", sizeof (tblname));
 347         if (dyn->pfid_net != 128)
 348                 snprintf(tblname + strlen(tblname),
 349                     sizeof (tblname) - strlen(tblname), "/%d", dyn->pfid_net);
 350         if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
 351                 rv = 1;
 352                 goto _bad;
 353         }
 354
 355         if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
 356                 rv = 1;
 357                 goto _bad;
 358         }
 359
 360         dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
 361         dyn->pfid_iflags = aw->iflags;
 362         dyn->pfid_af = af;
 363
 364         TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
 365         aw->p.dyn = dyn;
 366         pfi_kif_update(dyn->pfid_kif);
 367         return (0);
 368
 369 _bad:
 370         if (dyn->pfid_kt != NULL)
 371                 pfr_detach_table(dyn->pfid_kt);
 372         if (ruleset != NULL)
 373                 pf_remove_if_empty_ruleset(ruleset);
 374         if (dyn->pfid_kif != NULL)
 375                 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 376         pool_put(&pfi_addr_pl, dyn);
 377         return (rv);
 378 }
 379
 380 void
 381 pfi_kif_update(struct pfi_kif *kif)
 382 {
 383         struct pfi_dynaddr      *p;
 384
 385         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 386
 387         /* update all dynaddr */
 388         TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
 389                 pfi_dynaddr_update(p);
 390 }
 391
 392 void
 393 pfi_dynaddr_update(struct pfi_dynaddr *dyn)
 394 {
 395         struct pfi_kif          *kif;
 396         struct pfr_ktable       *kt;
 397
 398         if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL)
 399                 panic("pfi_dynaddr_update");
 400
 401         kif = dyn->pfid_kif;
 402         kt = dyn->pfid_kt;
 403
 404         if (kt->pfrkt_larg != pfi_update) {
 405                 /* this table needs to be brought up-to-date */
 406                 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
 407                 kt->pfrkt_larg = pfi_update;
 408         }
 409         pfr_dynaddr_update(kt, dyn);
 410 }
 411
 412 void
 413 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
 414 {
 415         int                      e, size2 = 0;
 416
 417         pfi_buffer_cnt = 0;
 418
 419         if (kif->pfik_ifp != NULL)
 420                 pfi_instance_add(kif->pfik_ifp, net, flags);
 421
 422         if ((e = pfr_set_addrs(&kt->pfrkt_t, CAST_USER_ADDR_T(pfi_buffer),
 423             pfi_buffer_cnt, &size2, NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
 424                 printf("pfi_table_update: cannot set %d new addresses "
 425                     "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
 426 }
 427
 428 void
 429 pfi_instance_add(struct ifnet *ifp, int net, int flags)
 430 {
 431         struct ifaddr   *ia;
 432         int              got4 = 0, got6 = 0;
 433         int              net2, af;
 434
 435         if (ifp == NULL)
 436                 return;
 437         ifnet_lock_shared(ifp);
 438         TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) {
 439                 if (ia->ifa_addr == NULL)
 440                         continue;
 441                 af = ia->ifa_addr->sa_family;
 442                 if (af != AF_INET && af != AF_INET6)
 443                         continue;
 444                 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6)
 445                         continue;
 446                 if ((flags & PFI_AFLAG_BROADCAST) &&
 447                     !(ifp->if_flags & IFF_BROADCAST))
 448                         continue;
 449                 if ((flags & PFI_AFLAG_PEER) &&
 450                     !(ifp->if_flags & IFF_POINTOPOINT))
 451                         continue;
 452                 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
 453                     IN6_IS_ADDR_LINKLOCAL(
 454                     &((struct sockaddr_in6 *)ia->ifa_addr)->sin6_addr))
 455                         continue;
 456                 if (flags & PFI_AFLAG_NOALIAS) {
 457                         if (af == AF_INET && got4)
 458                                 continue;
 459                         if (af == AF_INET6 && got6)
 460                                 continue;
 461                 }
 462                 if (af == AF_INET)
 463                         got4 = 1;
 464                 else if (af == AF_INET6)
 465                         got6 = 1;
 466                 net2 = net;
 467                 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
 468                         if (af == AF_INET)
 469                                 net2 = pfi_unmask(&((struct sockaddr_in *)
 470                                     ia->ifa_netmask)->sin_addr);
 471                         else if (af == AF_INET6)
 472                                 net2 = pfi_unmask(&((struct sockaddr_in6 *)
 473                                     ia->ifa_netmask)->sin6_addr);
 474                 }
 475                 if (af == AF_INET && net2 > 32)
 476                         net2 = 32;
 477                 if (flags & PFI_AFLAG_BROADCAST)
 478                         pfi_address_add(ia->ifa_broadaddr, af, net2);
 479                 else if (flags & PFI_AFLAG_PEER)
 480                         pfi_address_add(ia->ifa_dstaddr, af, net2);
 481                 else
 482                         pfi_address_add(ia->ifa_addr, af, net2);
 483         }
 484         ifnet_lock_done(ifp);
 485 }
 486
 487 void
 488 pfi_address_add(struct sockaddr *sa, int af, int net)
 489 {
 490         struct pfr_addr *p;
 491         int              i;
 492
 493         if (pfi_buffer_cnt >= pfi_buffer_max) {
 494                 int              new_max = pfi_buffer_max * 2;
 495
 496                 if (new_max > PFI_BUFFER_MAX) {
 497                         printf("pfi_address_add: address buffer full (%d/%d)\n",
 498                             pfi_buffer_cnt, PFI_BUFFER_MAX);
 499                         return;
 500                 }
 501                 p = _MALLOC(new_max * sizeof (*pfi_buffer), PFI_MTYPE,
 502                     M_WAITOK);
 503                 if (p == NULL) {
 504                         printf("pfi_address_add: no memory to grow buffer "
 505                             "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
 506                         return;
 507                 }
 508                 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof (*pfi_buffer));
 509                 /* no need to zero buffer */
 510                 _FREE(pfi_buffer, PFI_MTYPE);
 511                 pfi_buffer = p;
 512                 pfi_buffer_max = new_max;
 513         }
 514         if (af == AF_INET && net > 32)
 515                 net = 128;
 516         p = pfi_buffer + pfi_buffer_cnt++;
 517         bzero(p, sizeof (*p));
 518         p->pfra_af = af;
 519         p->pfra_net = net;
 520         if (af == AF_INET)
 521                 p->pfra_ip4addr = ((struct sockaddr_in *)sa)->sin_addr;
 522         else if (af == AF_INET6) {
 523                 p->pfra_ip6addr = ((struct sockaddr_in6 *)sa)->sin6_addr;
 524                 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr))
 525                         p->pfra_ip6addr.s6_addr16[1] = 0;
 526         }
 527         /* mask network address bits */
 528         if (net < 128)
 529                 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
 530         for (i = (p->pfra_net+7)/8; i < (int)sizeof (p->pfra_u); i++)
 531                 ((caddr_t)p)[i] = 0;
 532 }
 533
 534 void
 535 pfi_dynaddr_remove(struct pf_addr_wrap *aw)
 536 {
 537         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 538             aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
 539                 return;
 540
 541         TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
 542         pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
 543         aw->p.dyn->pfid_kif = NULL;
 544         pfr_detach_table(aw->p.dyn->pfid_kt);
 545         aw->p.dyn->pfid_kt = NULL;
 546         pool_put(&pfi_addr_pl, aw->p.dyn);
 547         aw->p.dyn = NULL;
 548 }
 549
 550 void
 551 pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
 552 {
 553         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 554             aw->p.dyn->pfid_kif == NULL)
 555                 return;
 556         aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
 557 }
 558
 559 void
 560 pfi_kifaddr_update(void *v)
 561 {
 562         struct pfi_kif          *kif = (struct pfi_kif *)v;
 563
 564         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 565
 566         pfi_update++;
 567         pfi_kif_update(kif);
 568 }
 569
 570 int
 571 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
 572 {
 573         return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
 574 }
 575
 576 void
 577 pfi_update_status(const char *name, struct pf_status *pfs)
 578 {
 579         struct pfi_kif          *p;
 580         struct pfi_kif_cmp       key;
 581         int                      i, j, k;
 582
 583         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 584
 585         strlcpy(key.pfik_name, name, sizeof (key.pfik_name));
 586         p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)&key);
 587         if (p == NULL)
 588                 return;
 589
 590         if (pfs) {
 591                 bzero(pfs->pcounters, sizeof (pfs->pcounters));
 592                 bzero(pfs->bcounters, sizeof (pfs->bcounters));
 593         }
 594         /* just clear statistics */
 595         if (pfs == NULL) {
 596                 bzero(p->pfik_packets, sizeof (p->pfik_packets));
 597                 bzero(p->pfik_bytes, sizeof (p->pfik_bytes));
 598                 p->pfik_tzero = pf_calendar_time_second();
 599         }
 600         for (i = 0; i < 2; i++)
 601                 for (j = 0; j < 2; j++)
 602                         for (k = 0; k < 2; k++) {
 603                                 pfs->pcounters[i][j][k] +=
 604                                     p->pfik_packets[i][j][k];
 605                                 pfs->bcounters[i][j] +=
 606                                     p->pfik_bytes[i][j][k];
 607                         }
 608 }
 609
 610 int
 611 pfi_get_ifaces(const char *name, user_addr_t buf, int *size)
 612 {
 613         struct pfi_kif   *p, *nextp;
 614         int              n = 0;
 615
 616         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 617
 618         for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
 619                 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 620                 if (pfi_skip_if(name, p))
 621                         continue;
 622                 if (*size > n++) {
 623                         struct pfi_uif u;
 624
 625                         if (!p->pfik_tzero)
 626                                 p->pfik_tzero = pf_calendar_time_second();
 627                         pfi_kif_ref(p, PFI_KIF_REF_RULE);
 628
 629                         /* return the user space version of pfi_kif */
 630                         bzero(&u, sizeof (u));
 631                         bcopy(p->pfik_name, &u.pfik_name, sizeof (u.pfik_name));
 632                         bcopy(p->pfik_packets, &u.pfik_packets,
 633                             sizeof (u.pfik_packets));
 634                         bcopy(p->pfik_bytes, &u.pfik_bytes,
 635                             sizeof (u.pfik_bytes));
 636                         u.pfik_tzero = p->pfik_tzero;
 637                         u.pfik_flags = p->pfik_flags;
 638                         u.pfik_states = p->pfik_states;
 639                         u.pfik_rules = p->pfik_rules;
 640
 641                         if (copyout(&u, buf, sizeof (u))) {
 642                                 pfi_kif_unref(p, PFI_KIF_REF_RULE);
 643                                 return (EFAULT);
 644                         }
 645                         buf += sizeof (u);
 646                         nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 647                         pfi_kif_unref(p, PFI_KIF_REF_RULE);
 648                 }
 649         }
 650         *size = n;
 651         return (0);
 652 }
 653
 654 int
 655 pfi_skip_if(const char *filter, struct pfi_kif *p)
 656 {
 657         int     n;
 658
 659         if (filter == NULL || !*filter)
 660                 return (0);
 661         if (strcmp(p->pfik_name, filter) == 0)
 662                 return (0);     /* exact match */
 663         n = strlen(filter);
 664         if (n < 1 || n >= IFNAMSIZ)
 665                 return (1);     /* sanity check */
 666         if (filter[n-1] >= '0' && filter[n-1] <= '9')
 667                 return (1);     /* only do exact match in that case */
 668         if (strncmp(p->pfik_name, filter, n))
 669                 return (1);     /* prefix doesn't match */
 670         return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
 671 }
 672
 673 int
 674 pfi_set_flags(const char *name, int flags)
 675 {
 676         struct pfi_kif  *p;
 677
 678         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 679
 680         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 681                 if (pfi_skip_if(name, p))
 682                         continue;
 683                 p->pfik_flags |= flags;
 684         }
 685         return (0);
 686 }
 687
 688 int
 689 pfi_clear_flags(const char *name, int flags)
 690 {
 691         struct pfi_kif  *p;
 692
 693         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 694
 695         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 696                 if (pfi_skip_if(name, p))
 697                         continue;
 698                 p->pfik_flags &= ~flags;
 699         }
 700         return (0);
 701 }
 702
 703 /* from pf_print_state.c */
 704 int
 705 pfi_unmask(void *addr)
 706 {
 707         struct pf_addr *m = addr;
 708         int i = 31, j = 0, b = 0;
 709         u_int32_t tmp;
 710
 711         while (j < 4 && m->addr32[j] == 0xffffffff) {
 712                 b += 32;
 713                 j++;
 714         }
 715         if (j < 4) {
 716                 tmp = ntohl(m->addr32[j]);
 717                 for (i = 31; tmp & (1 << i); --i)
 718                         b++;
 719         }
 720         return (b);
 721 }