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