bsd/net/pf_if.c

   1 /*
   2  * Copyright (c) 2007-2013 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,
 152             (struct pfi_kif *)(void *)&s)) != NULL)
 153                 return (kif);
 154
 155         /* create new one */
 156         if ((kif = _MALLOC(sizeof (*kif), PFI_MTYPE, M_WAITOK|M_ZERO)) == NULL)
 157                 return (NULL);
 158
 159         strlcpy(kif->pfik_name, kif_name, sizeof (kif->pfik_name));
 160         kif->pfik_tzero = pf_calendar_time_second();
 161         TAILQ_INIT(&kif->pfik_dynaddrs);
 162
 163         RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
 164         return (kif);
 165 }
 166
 167 void
 168 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
 169 {
 170         switch (what) {
 171         case PFI_KIF_REF_RULE:
 172                 kif->pfik_rules++;
 173                 break;
 174         case PFI_KIF_REF_STATE:
 175                 kif->pfik_states++;
 176                 break;
 177         default:
 178                 panic("pfi_kif_ref with unknown type");
 179         }
 180 }
 181
 182 void
 183 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
 184 {
 185         if (kif == NULL)
 186                 return;
 187
 188         switch (what) {
 189         case PFI_KIF_REF_NONE:
 190                 break;
 191         case PFI_KIF_REF_RULE:
 192                 if (kif->pfik_rules <= 0) {
 193                         printf("pfi_kif_unref: rules refcount <= 0\n");
 194                         return;
 195                 }
 196                 kif->pfik_rules--;
 197                 break;
 198         case PFI_KIF_REF_STATE:
 199                 if (kif->pfik_states <= 0) {
 200                         printf("pfi_kif_unref: state refcount <= 0\n");
 201                         return;
 202                 }
 203                 kif->pfik_states--;
 204                 break;
 205         default:
 206                 panic("pfi_kif_unref with unknown type");
 207         }
 208
 209         if (kif->pfik_ifp != NULL || kif == pfi_all)
 210                 return;
 211
 212         if (kif->pfik_rules || kif->pfik_states)
 213                 return;
 214
 215         RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
 216         _FREE(kif, PFI_MTYPE);
 217 }
 218
 219 int
 220 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
 221 {
 222
 223         if (rule_kif == NULL || rule_kif == packet_kif)
 224                 return (1);
 225
 226         return (0);
 227 }
 228
 229 void
 230 pfi_attach_ifnet(struct ifnet *ifp)
 231 {
 232         struct pfi_kif *kif;
 233
 234         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 235
 236         pfi_update++;
 237         if ((kif = pfi_kif_get(if_name(ifp))) == NULL)
 238                 panic("pfi_kif_get failed");
 239
 240         ifnet_lock_exclusive(ifp);
 241         kif->pfik_ifp = ifp;
 242         ifp->if_pf_kif = kif;
 243         ifnet_lock_done(ifp);
 244
 245         pfi_kif_update(kif);
 246 }
 247
 248 /*
 249  * Caller holds ifnet lock as writer (exclusive);
 250  */
 251 void
 252 pfi_detach_ifnet(struct ifnet *ifp)
 253 {
 254         struct pfi_kif          *kif;
 255
 256         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 257
 258         if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL)
 259                 return;
 260
 261         pfi_update++;
 262         pfi_kif_update(kif);
 263
 264         ifnet_lock_exclusive(ifp);
 265         kif->pfik_ifp = NULL;
 266         ifp->if_pf_kif = NULL;
 267         ifnet_lock_done(ifp);
 268
 269         pfi_kif_unref(kif, PFI_KIF_REF_NONE);
 270 }
 271
 272 int
 273 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
 274 {
 275         switch (af) {
 276 #if INET
 277         case AF_INET:
 278                 switch (dyn->pfid_acnt4) {
 279                 case 0:
 280                         return (0);
 281                 case 1:
 282                         return (PF_MATCHA(0, &dyn->pfid_addr4,
 283                             &dyn->pfid_mask4, a, AF_INET));
 284                 default:
 285                         return (pfr_match_addr(dyn->pfid_kt, a, AF_INET));
 286                 }
 287                 break;
 288 #endif /* INET */
 289 #if INET6
 290         case AF_INET6:
 291                 switch (dyn->pfid_acnt6) {
 292                 case 0:
 293                         return (0);
 294                 case 1:
 295                         return (PF_MATCHA(0, &dyn->pfid_addr6,
 296                             &dyn->pfid_mask6, a, AF_INET6));
 297                 default:
 298                         return (pfr_match_addr(dyn->pfid_kt, a, AF_INET6));
 299                 }
 300                 break;
 301 #endif /* INET6 */
 302         default:
 303                 return (0);
 304         }
 305 }
 306
 307 int
 308 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
 309 {
 310         struct pfi_dynaddr      *dyn;
 311         char                     tblname[PF_TABLE_NAME_SIZE];
 312         struct pf_ruleset       *ruleset = NULL;
 313         int                      rv = 0;
 314
 315         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 316
 317         if (aw->type != PF_ADDR_DYNIFTL)
 318                 return (0);
 319         if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK)) == NULL)
 320                 return (1);
 321         bzero(dyn, sizeof (*dyn));
 322
 323         if (strcmp(aw->v.ifname, "self") == 0)
 324                 dyn->pfid_kif = pfi_kif_get(IFG_ALL);
 325         else
 326                 dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
 327         if (dyn->pfid_kif == NULL) {
 328                 rv = 1;
 329                 goto _bad;
 330         }
 331         pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 332
 333         dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
 334         if (af == AF_INET && dyn->pfid_net == 32)
 335                 dyn->pfid_net = 128;
 336         strlcpy(tblname, aw->v.ifname, sizeof (tblname));
 337         if (aw->iflags & PFI_AFLAG_NETWORK)
 338                 strlcat(tblname, ":network", sizeof (tblname));
 339         if (aw->iflags & PFI_AFLAG_BROADCAST)
 340                 strlcat(tblname, ":broadcast", sizeof (tblname));
 341         if (aw->iflags & PFI_AFLAG_PEER)
 342                 strlcat(tblname, ":peer", sizeof (tblname));
 343         if (aw->iflags & PFI_AFLAG_NOALIAS)
 344                 strlcat(tblname, ":0", sizeof (tblname));
 345         if (dyn->pfid_net != 128)
 346                 snprintf(tblname + strlen(tblname),
 347                     sizeof (tblname) - strlen(tblname), "/%d", dyn->pfid_net);
 348         if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
 349                 rv = 1;
 350                 goto _bad;
 351         }
 352
 353         if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
 354                 rv = 1;
 355                 goto _bad;
 356         }
 357
 358         dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
 359         dyn->pfid_iflags = aw->iflags;
 360         dyn->pfid_af = af;
 361
 362         TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
 363         aw->p.dyn = dyn;
 364         pfi_kif_update(dyn->pfid_kif);
 365         return (0);
 366
 367 _bad:
 368         if (dyn->pfid_kt != NULL)
 369                 pfr_detach_table(dyn->pfid_kt);
 370         if (ruleset != NULL)
 371                 pf_remove_if_empty_ruleset(ruleset);
 372         if (dyn->pfid_kif != NULL)
 373                 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 374         pool_put(&pfi_addr_pl, dyn);
 375         return (rv);
 376 }
 377
 378 void
 379 pfi_kif_update(struct pfi_kif *kif)
 380 {
 381         struct pfi_dynaddr      *p;
 382
 383         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 384
 385         /* update all dynaddr */
 386         TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
 387                 pfi_dynaddr_update(p);
 388 }
 389
 390 void
 391 pfi_dynaddr_update(struct pfi_dynaddr *dyn)
 392 {
 393         struct pfi_kif          *kif;
 394         struct pfr_ktable       *kt;
 395
 396         if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL)
 397                 panic("pfi_dynaddr_update");
 398
 399         kif = dyn->pfid_kif;
 400         kt = dyn->pfid_kt;
 401
 402         if (kt->pfrkt_larg != pfi_update) {
 403                 /* this table needs to be brought up-to-date */
 404                 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
 405                 kt->pfrkt_larg = pfi_update;
 406         }
 407         pfr_dynaddr_update(kt, dyn);
 408 }
 409
 410 void
 411 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, int net, int flags)
 412 {
 413         int                      e, size2 = 0;
 414
 415         pfi_buffer_cnt = 0;
 416
 417         if (kif->pfik_ifp != NULL)
 418                 pfi_instance_add(kif->pfik_ifp, net, flags);
 419
 420         if ((e = pfr_set_addrs(&kt->pfrkt_t, CAST_USER_ADDR_T(pfi_buffer),
 421             pfi_buffer_cnt, &size2, NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK)))
 422                 printf("pfi_table_update: cannot set %d new addresses "
 423                     "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
 424 }
 425
 426 void
 427 pfi_instance_add(struct ifnet *ifp, int net, int flags)
 428 {
 429         struct ifaddr   *ia;
 430         int              got4 = 0, got6 = 0;
 431         int              net2, af;
 432
 433         if (ifp == NULL)
 434                 return;
 435         ifnet_lock_shared(ifp);
 436         TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) {
 437                 IFA_LOCK(ia);
 438                 if (ia->ifa_addr == NULL) {
 439                         IFA_UNLOCK(ia);
 440                         continue;
 441                 }
 442                 af = ia->ifa_addr->sa_family;
 443                 if (af != AF_INET && af != AF_INET6) {
 444                         IFA_UNLOCK(ia);
 445                         continue;
 446                 }
 447                 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) {
 448                         IFA_UNLOCK(ia);
 449                         continue;
 450                 }
 451                 if ((flags & PFI_AFLAG_BROADCAST) &&
 452                     !(ifp->if_flags & IFF_BROADCAST)) {
 453                         IFA_UNLOCK(ia);
 454                         continue;
 455                 }
 456                 if ((flags & PFI_AFLAG_PEER) &&
 457                     !(ifp->if_flags & IFF_POINTOPOINT)) {
 458                         IFA_UNLOCK(ia);
 459                         continue;
 460                 }
 461                 if ((flags & PFI_AFLAG_NETWORK) && af == AF_INET6 &&
 462                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
 463                     (void *)ia->ifa_addr)->sin6_addr)) {
 464                         IFA_UNLOCK(ia);
 465                         continue;
 466                 }
 467                 if (flags & PFI_AFLAG_NOALIAS) {
 468                         if (af == AF_INET && got4) {
 469                                 IFA_UNLOCK(ia);
 470                                 continue;
 471                         }
 472                         if (af == AF_INET6 && got6) {
 473                                 IFA_UNLOCK(ia);
 474                                 continue;
 475                         }
 476                 }
 477                 if (af == AF_INET)
 478                         got4 = 1;
 479                 else if (af == AF_INET6)
 480                         got6 = 1;
 481                 net2 = net;
 482                 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
 483                         if (af == AF_INET)
 484                                 net2 = pfi_unmask(&((struct sockaddr_in *)
 485                                     (void *)ia->ifa_netmask)->sin_addr);
 486                         else if (af == AF_INET6)
 487                                 net2 = pfi_unmask(&((struct sockaddr_in6 *)
 488                                     (void *)ia->ifa_netmask)->sin6_addr);
 489                 }
 490                 if (af == AF_INET && net2 > 32)
 491                         net2 = 32;
 492                 if (flags & PFI_AFLAG_BROADCAST)
 493                         pfi_address_add(ia->ifa_broadaddr, af, net2);
 494                 else if (flags & PFI_AFLAG_PEER)
 495                         pfi_address_add(ia->ifa_dstaddr, af, net2);
 496                 else
 497                         pfi_address_add(ia->ifa_addr, af, net2);
 498                 IFA_UNLOCK(ia);
 499         }
 500         ifnet_lock_done(ifp);
 501 }
 502
 503 void
 504 pfi_address_add(struct sockaddr *sa, int af, int net)
 505 {
 506         struct pfr_addr *p;
 507         int              i;
 508
 509         if (pfi_buffer_cnt >= pfi_buffer_max) {
 510                 int              new_max = pfi_buffer_max * 2;
 511
 512                 if (new_max > PFI_BUFFER_MAX) {
 513                         printf("pfi_address_add: address buffer full (%d/%d)\n",
 514                             pfi_buffer_cnt, PFI_BUFFER_MAX);
 515                         return;
 516                 }
 517                 p = _MALLOC(new_max * sizeof (*pfi_buffer), PFI_MTYPE,
 518                     M_WAITOK);
 519                 if (p == NULL) {
 520                         printf("pfi_address_add: no memory to grow buffer "
 521                             "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
 522                         return;
 523                 }
 524                 memcpy(pfi_buffer, p, pfi_buffer_cnt * sizeof (*pfi_buffer));
 525                 /* no need to zero buffer */
 526                 _FREE(pfi_buffer, PFI_MTYPE);
 527                 pfi_buffer = p;
 528                 pfi_buffer_max = new_max;
 529         }
 530         if (af == AF_INET && net > 32)
 531                 net = 128;
 532         p = pfi_buffer + pfi_buffer_cnt++;
 533         bzero(p, sizeof (*p));
 534         p->pfra_af = af;
 535         p->pfra_net = net;
 536         if (af == AF_INET)
 537                 p->pfra_ip4addr = ((struct sockaddr_in *)(void *)sa)->sin_addr;
 538         else if (af == AF_INET6) {
 539                 p->pfra_ip6addr =
 540                     ((struct sockaddr_in6 *)(void *)sa)->sin6_addr;
 541                 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr))
 542                         p->pfra_ip6addr.s6_addr16[1] = 0;
 543         }
 544         /* mask network address bits */
 545         if (net < 128)
 546                 ((caddr_t)p)[p->pfra_net/8] &= ~(0xFF >> (p->pfra_net%8));
 547         for (i = (p->pfra_net+7)/8; i < (int)sizeof (p->pfra_u); i++)
 548                 ((caddr_t)p)[i] = 0;
 549 }
 550
 551 void
 552 pfi_dynaddr_remove(struct pf_addr_wrap *aw)
 553 {
 554         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 555             aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL)
 556                 return;
 557
 558         TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
 559         pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
 560         aw->p.dyn->pfid_kif = NULL;
 561         pfr_detach_table(aw->p.dyn->pfid_kt);
 562         aw->p.dyn->pfid_kt = NULL;
 563         pool_put(&pfi_addr_pl, aw->p.dyn);
 564         aw->p.dyn = NULL;
 565 }
 566
 567 void
 568 pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
 569 {
 570         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 571             aw->p.dyn->pfid_kif == NULL)
 572                 return;
 573         aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
 574 }
 575
 576 void
 577 pfi_kifaddr_update(void *v)
 578 {
 579         struct pfi_kif          *kif = (struct pfi_kif *)v;
 580
 581         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 582
 583         pfi_update++;
 584         pfi_kif_update(kif);
 585 }
 586
 587 int
 588 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
 589 {
 590         return (strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ));
 591 }
 592
 593 void
 594 pfi_update_status(const char *name, struct pf_status *pfs)
 595 {
 596         struct pfi_kif          *p;
 597         struct pfi_kif_cmp       key;
 598         int                      i, j, k;
 599
 600         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 601
 602         strlcpy(key.pfik_name, name, sizeof (key.pfik_name));
 603         p = RB_FIND(pfi_ifhead, &pfi_ifs, (struct pfi_kif *)(void *)&key);
 604         if (p == NULL)
 605                 return;
 606
 607         if (pfs) {
 608                 bzero(pfs->pcounters, sizeof (pfs->pcounters));
 609                 bzero(pfs->bcounters, sizeof (pfs->bcounters));
 610         }
 611         /* just clear statistics */
 612         if (pfs == NULL) {
 613                 bzero(p->pfik_packets, sizeof (p->pfik_packets));
 614                 bzero(p->pfik_bytes, sizeof (p->pfik_bytes));
 615                 p->pfik_tzero = pf_calendar_time_second();
 616         }
 617         for (i = 0; i < 2; i++)
 618                 for (j = 0; j < 2; j++)
 619                         for (k = 0; k < 2; k++) {
 620                                 pfs->pcounters[i][j][k] +=
 621                                     p->pfik_packets[i][j][k];
 622                                 pfs->bcounters[i][j] +=
 623                                     p->pfik_bytes[i][j][k];
 624                         }
 625 }
 626
 627 int
 628 pfi_get_ifaces(const char *name, user_addr_t buf, int *size)
 629 {
 630         struct pfi_kif   *p, *nextp;
 631         int              n = 0;
 632
 633         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 634
 635         for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
 636                 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 637                 if (pfi_skip_if(name, p))
 638                         continue;
 639                 if (*size > n++) {
 640                         struct pfi_uif u;
 641
 642                         if (!p->pfik_tzero)
 643                                 p->pfik_tzero = pf_calendar_time_second();
 644                         pfi_kif_ref(p, PFI_KIF_REF_RULE);
 645
 646                         /* return the user space version of pfi_kif */
 647                         bzero(&u, sizeof (u));
 648                         bcopy(p->pfik_name, &u.pfik_name, sizeof (u.pfik_name));
 649                         bcopy(p->pfik_packets, &u.pfik_packets,
 650                             sizeof (u.pfik_packets));
 651                         bcopy(p->pfik_bytes, &u.pfik_bytes,
 652                             sizeof (u.pfik_bytes));
 653                         u.pfik_tzero = p->pfik_tzero;
 654                         u.pfik_flags = p->pfik_flags;
 655                         u.pfik_states = p->pfik_states;
 656                         u.pfik_rules = p->pfik_rules;
 657
 658                         if (copyout(&u, buf, sizeof (u))) {
 659                                 pfi_kif_unref(p, PFI_KIF_REF_RULE);
 660                                 return (EFAULT);
 661                         }
 662                         buf += sizeof (u);
 663                         nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 664                         pfi_kif_unref(p, PFI_KIF_REF_RULE);
 665                 }
 666         }
 667         *size = n;
 668         return (0);
 669 }
 670
 671 int
 672 pfi_skip_if(const char *filter, struct pfi_kif *p)
 673 {
 674         int     n;
 675
 676         if (filter == NULL || !*filter)
 677                 return (0);
 678         if (strcmp(p->pfik_name, filter) == 0)
 679                 return (0);     /* exact match */
 680         n = strlen(filter);
 681         if (n < 1 || n >= IFNAMSIZ)
 682                 return (1);     /* sanity check */
 683         if (filter[n-1] >= '0' && filter[n-1] <= '9')
 684                 return (1);     /* only do exact match in that case */
 685         if (strncmp(p->pfik_name, filter, n))
 686                 return (1);     /* prefix doesn't match */
 687         return (p->pfik_name[n] < '0' || p->pfik_name[n] > '9');
 688 }
 689
 690 int
 691 pfi_set_flags(const char *name, int flags)
 692 {
 693         struct pfi_kif  *p;
 694
 695         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 696
 697         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 698                 if (pfi_skip_if(name, p))
 699                         continue;
 700                 p->pfik_flags |= flags;
 701         }
 702         return (0);
 703 }
 704
 705 int
 706 pfi_clear_flags(const char *name, int flags)
 707 {
 708         struct pfi_kif  *p;
 709
 710         lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
 711
 712         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 713                 if (pfi_skip_if(name, p))
 714                         continue;
 715                 p->pfik_flags &= ~flags;
 716         }
 717         return (0);
 718 }
 719
 720 /* from pf_print_state.c */
 721 int
 722 pfi_unmask(void *addr)
 723 {
 724         struct pf_addr *m = addr;
 725         int i = 31, j = 0, b = 0;
 726         u_int32_t tmp;
 727
 728         while (j < 4 && m->addr32[j] == 0xffffffff) {
 729                 b += 32;
 730                 j++;
 731         }
 732         if (j < 4) {
 733                 tmp = ntohl(m->addr32[j]);
 734                 for (i = 31; tmp & (1 << i); --i)
 735                         b++;
 736         }
 737         return (b);
 738 }