bsd/net/pf_if.c

   1 /*
   2  * Copyright (c) 2007-2019 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 #include <netinet/ip6.h>
  85
  86 #include <net/pfvar.h>
  87
  88 struct pfi_kif                  *pfi_all = NULL;
  89
  90 static struct pool              pfi_addr_pl;
  91 static struct pfi_ifhead        pfi_ifs;
  92 static u_int32_t                pfi_update = 1;
  93 static struct pfr_addr          *pfi_buffer;
  94 static int                      pfi_buffer_cnt;
  95 static int                      pfi_buffer_max;
  96
  97 __private_extern__ void pfi_kifaddr_update(void *);
  98
  99 static void pfi_kif_update(struct pfi_kif *);
 100 static void pfi_dynaddr_update(struct pfi_dynaddr *dyn);
 101 static void pfi_table_update(struct pfr_ktable *, struct pfi_kif *, uint8_t, int);
 102 static void pfi_instance_add(struct ifnet *, uint8_t, int);
 103 static void pfi_address_add(struct sockaddr *, uint8_t, uint8_t);
 104 static int pfi_if_compare(struct pfi_kif *, struct pfi_kif *);
 105 static int pfi_skip_if(const char *, struct pfi_kif *);
 106 static uint8_t pfi_unmask(void *);
 107
 108 RB_PROTOTYPE_SC(static, pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
 109 RB_GENERATE(pfi_ifhead, pfi_kif, pfik_tree, pfi_if_compare);
 110
 111 #define PFI_BUFFER_MAX          0x10000
 112 #define PFI_MTYPE               M_IFADDR
 113
 114 #define IFG_ALL "ALL"
 115
 116 void
 117 pfi_initialize(void)
 118 {
 119         if (pfi_all != NULL) {  /* already initialized */
 120                 return;
 121         }
 122
 123         pool_init(&pfi_addr_pl, sizeof(struct pfi_dynaddr), 0, 0, 0,
 124             "pfiaddrpl", NULL);
 125         pfi_buffer_max = 64;
 126         pfi_buffer = _MALLOC(pfi_buffer_max * sizeof(*pfi_buffer),
 127             PFI_MTYPE, M_WAITOK);
 128
 129         if ((pfi_all = pfi_kif_get(IFG_ALL)) == NULL) {
 130                 panic("pfi_kif_get for pfi_all failed");
 131         }
 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       s;
 148
 149         bzero(&s.pfik_name, sizeof(s.pfik_name));
 150         strlcpy(s.pfik_name, kif_name, sizeof(s.pfik_name));
 151         kif = RB_FIND(pfi_ifhead, &pfi_ifs, &s);
 152         if (kif != NULL) {
 153                 return kif;
 154         }
 155
 156         /* create new one */
 157         if ((kif = _MALLOC(sizeof(*kif), PFI_MTYPE, M_WAITOK | M_ZERO)) == NULL) {
 158                 return NULL;
 159         }
 160
 161         strlcpy(kif->pfik_name, kif_name, sizeof(kif->pfik_name));
 162         kif->pfik_tzero = pf_calendar_time_second();
 163         TAILQ_INIT(&kif->pfik_dynaddrs);
 164
 165         RB_INSERT(pfi_ifhead, &pfi_ifs, kif);
 166         return kif;
 167 }
 168
 169 void
 170 pfi_kif_ref(struct pfi_kif *kif, enum pfi_kif_refs what)
 171 {
 172         switch (what) {
 173         case PFI_KIF_REF_RULE:
 174                 kif->pfik_rules++;
 175                 break;
 176         case PFI_KIF_REF_STATE:
 177                 kif->pfik_states++;
 178                 break;
 179         default:
 180                 panic("pfi_kif_ref with unknown type");
 181         }
 182 }
 183
 184 void
 185 pfi_kif_unref(struct pfi_kif *kif, enum pfi_kif_refs what)
 186 {
 187         if (kif == NULL) {
 188                 return;
 189         }
 190
 191         switch (what) {
 192         case PFI_KIF_REF_NONE:
 193                 break;
 194         case PFI_KIF_REF_RULE:
 195                 if (kif->pfik_rules <= 0) {
 196                         printf("pfi_kif_unref: rules refcount <= 0\n");
 197                         return;
 198                 }
 199                 kif->pfik_rules--;
 200                 break;
 201         case PFI_KIF_REF_STATE:
 202                 if (kif->pfik_states <= 0) {
 203                         printf("pfi_kif_unref: state refcount <= 0\n");
 204                         return;
 205                 }
 206                 kif->pfik_states--;
 207                 break;
 208         default:
 209                 panic("pfi_kif_unref with unknown type");
 210         }
 211
 212         if (kif->pfik_ifp != NULL || kif == pfi_all) {
 213                 return;
 214         }
 215
 216         if (kif->pfik_rules || kif->pfik_states) {
 217                 return;
 218         }
 219
 220         RB_REMOVE(pfi_ifhead, &pfi_ifs, kif);
 221         _FREE(kif, PFI_MTYPE);
 222 }
 223
 224 int
 225 pfi_kif_match(struct pfi_kif *rule_kif, struct pfi_kif *packet_kif)
 226 {
 227         if (rule_kif == NULL || rule_kif == packet_kif) {
 228                 return 1;
 229         }
 230
 231         return 0;
 232 }
 233
 234 void
 235 pfi_attach_ifnet(struct ifnet *ifp)
 236 {
 237         struct pfi_kif *kif;
 238
 239         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 240
 241         pfi_update++;
 242         if ((kif = pfi_kif_get(if_name(ifp))) == NULL) {
 243                 panic("pfi_kif_get failed");
 244         }
 245
 246         ifnet_lock_exclusive(ifp);
 247         kif->pfik_ifp = ifp;
 248         ifp->if_pf_kif = kif;
 249         ifnet_lock_done(ifp);
 250
 251         pfi_kif_update(kif);
 252 }
 253
 254 /*
 255  * Caller holds ifnet lock as writer (exclusive);
 256  */
 257 void
 258 pfi_detach_ifnet(struct ifnet *ifp)
 259 {
 260         struct pfi_kif          *kif;
 261
 262         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 263
 264         if ((kif = (struct pfi_kif *)ifp->if_pf_kif) == NULL) {
 265                 return;
 266         }
 267
 268         pfi_update++;
 269         pfi_kif_update(kif);
 270
 271         ifnet_lock_exclusive(ifp);
 272         kif->pfik_ifp = NULL;
 273         ifp->if_pf_kif = NULL;
 274         ifnet_lock_done(ifp);
 275
 276         pfi_kif_unref(kif, PFI_KIF_REF_NONE);
 277 }
 278
 279 int
 280 pfi_match_addr(struct pfi_dynaddr *dyn, struct pf_addr *a, sa_family_t af)
 281 {
 282         switch (af) {
 283 #if INET
 284         case AF_INET:
 285                 switch (dyn->pfid_acnt4) {
 286                 case 0:
 287                         return 0;
 288                 case 1:
 289                         return PF_MATCHA(0, &dyn->pfid_addr4,
 290                                    &dyn->pfid_mask4, a, AF_INET);
 291                 default:
 292                         return pfr_match_addr(dyn->pfid_kt, a, AF_INET);
 293                 }
 294 #endif /* INET */
 295         case AF_INET6:
 296                 switch (dyn->pfid_acnt6) {
 297                 case 0:
 298                         return 0;
 299                 case 1:
 300                         return PF_MATCHA(0, &dyn->pfid_addr6,
 301                                    &dyn->pfid_mask6, a, AF_INET6);
 302                 default:
 303                         return pfr_match_addr(dyn->pfid_kt, a, AF_INET6);
 304                 }
 305         default:
 306                 return 0;
 307         }
 308 }
 309
 310 int
 311 pfi_dynaddr_setup(struct pf_addr_wrap *aw, sa_family_t af)
 312 {
 313         struct pfi_dynaddr      *dyn;
 314         char                     tblname[PF_TABLE_NAME_SIZE];
 315         struct pf_ruleset       *ruleset = NULL;
 316         int                      rv = 0;
 317
 318         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 319
 320         if (aw->type != PF_ADDR_DYNIFTL) {
 321                 return 0;
 322         }
 323         if ((dyn = pool_get(&pfi_addr_pl, PR_WAITOK)) == NULL) {
 324                 return 1;
 325         }
 326         bzero(dyn, sizeof(*dyn));
 327
 328         if (strcmp(aw->v.ifname, "self") == 0) {
 329                 dyn->pfid_kif = pfi_kif_get(IFG_ALL);
 330         } else {
 331                 dyn->pfid_kif = pfi_kif_get(aw->v.ifname);
 332         }
 333         if (dyn->pfid_kif == NULL) {
 334                 rv = 1;
 335                 goto _bad;
 336         }
 337         pfi_kif_ref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 338
 339         dyn->pfid_net = pfi_unmask(&aw->v.a.mask);
 340         if (af == AF_INET && dyn->pfid_net == 32) {
 341                 dyn->pfid_net = 128;
 342         }
 343         strlcpy(tblname, aw->v.ifname, sizeof(tblname));
 344         if (aw->iflags & PFI_AFLAG_NETWORK) {
 345                 strlcat(tblname, ":network", sizeof(tblname));
 346         }
 347         if (aw->iflags & PFI_AFLAG_BROADCAST) {
 348                 strlcat(tblname, ":broadcast", sizeof(tblname));
 349         }
 350         if (aw->iflags & PFI_AFLAG_PEER) {
 351                 strlcat(tblname, ":peer", sizeof(tblname));
 352         }
 353         if (aw->iflags & PFI_AFLAG_NOALIAS) {
 354                 strlcat(tblname, ":0", sizeof(tblname));
 355         }
 356         if (dyn->pfid_net != 128) {
 357                 snprintf(tblname + strlen(tblname),
 358                     sizeof(tblname) - strlen(tblname), "/%d", dyn->pfid_net);
 359         }
 360         if ((ruleset = pf_find_or_create_ruleset(PF_RESERVED_ANCHOR)) == NULL) {
 361                 rv = 1;
 362                 goto _bad;
 363         }
 364
 365         if ((dyn->pfid_kt = pfr_attach_table(ruleset, tblname)) == NULL) {
 366                 rv = 1;
 367                 goto _bad;
 368         }
 369
 370         dyn->pfid_kt->pfrkt_flags |= PFR_TFLAG_ACTIVE;
 371         dyn->pfid_iflags = aw->iflags;
 372         dyn->pfid_af = af;
 373
 374         TAILQ_INSERT_TAIL(&dyn->pfid_kif->pfik_dynaddrs, dyn, entry);
 375         aw->p.dyn = dyn;
 376         pfi_kif_update(dyn->pfid_kif);
 377         return 0;
 378
 379 _bad:
 380         if (dyn->pfid_kt != NULL) {
 381                 pfr_detach_table(dyn->pfid_kt);
 382         }
 383         if (ruleset != NULL) {
 384                 pf_remove_if_empty_ruleset(ruleset);
 385         }
 386         if (dyn->pfid_kif != NULL) {
 387                 pfi_kif_unref(dyn->pfid_kif, PFI_KIF_REF_RULE);
 388         }
 389         pool_put(&pfi_addr_pl, dyn);
 390         return rv;
 391 }
 392
 393 void
 394 pfi_kif_update(struct pfi_kif *kif)
 395 {
 396         struct pfi_dynaddr      *p;
 397
 398         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 399
 400         /* update all dynaddr */
 401         TAILQ_FOREACH(p, &kif->pfik_dynaddrs, entry)
 402         pfi_dynaddr_update(p);
 403 }
 404
 405 void
 406 pfi_dynaddr_update(struct pfi_dynaddr *dyn)
 407 {
 408         struct pfi_kif          *kif;
 409         struct pfr_ktable       *kt;
 410
 411         if (dyn == NULL || dyn->pfid_kif == NULL || dyn->pfid_kt == NULL) {
 412                 panic("pfi_dynaddr_update");
 413         }
 414
 415         kif = dyn->pfid_kif;
 416         kt = dyn->pfid_kt;
 417
 418         if (kt->pfrkt_larg != pfi_update) {
 419                 /* this table needs to be brought up-to-date */
 420                 pfi_table_update(kt, kif, dyn->pfid_net, dyn->pfid_iflags);
 421                 kt->pfrkt_larg = pfi_update;
 422         }
 423         pfr_dynaddr_update(kt, dyn);
 424 }
 425
 426 void
 427 pfi_table_update(struct pfr_ktable *kt, struct pfi_kif *kif, uint8_t net, int flags)
 428 {
 429         int                      e, size2 = 0;
 430
 431         pfi_buffer_cnt = 0;
 432
 433         if (kif->pfik_ifp != NULL) {
 434                 pfi_instance_add(kif->pfik_ifp, net, flags);
 435         }
 436
 437         if ((e = pfr_set_addrs(&kt->pfrkt_t, CAST_USER_ADDR_T(pfi_buffer),
 438             pfi_buffer_cnt, &size2, NULL, NULL, NULL, 0, PFR_TFLAG_ALLMASK))) {
 439                 printf("pfi_table_update: cannot set %d new addresses "
 440                     "into table %s: %d\n", pfi_buffer_cnt, kt->pfrkt_name, e);
 441         }
 442 }
 443
 444 void
 445 pfi_instance_add(struct ifnet *ifp, uint8_t net, int flags)
 446 {
 447         struct ifaddr   *ia;
 448         int              got4 = 0, got6 = 0;
 449         uint8_t          net2, af;
 450
 451         if (ifp == NULL) {
 452                 return;
 453         }
 454         ifnet_lock_shared(ifp);
 455         TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) {
 456                 IFA_LOCK(ia);
 457                 if (ia->ifa_addr == NULL) {
 458                         IFA_UNLOCK(ia);
 459                         continue;
 460                 }
 461                 af = ia->ifa_addr->sa_family;
 462                 if (af != AF_INET && af != AF_INET6) {
 463                         IFA_UNLOCK(ia);
 464                         continue;
 465                 }
 466                 if ((flags & PFI_AFLAG_BROADCAST) && af == AF_INET6) {
 467                         IFA_UNLOCK(ia);
 468                         continue;
 469                 }
 470                 if ((flags & PFI_AFLAG_BROADCAST) &&
 471                     !(ifp->if_flags & IFF_BROADCAST)) {
 472                         IFA_UNLOCK(ia);
 473                         continue;
 474                 }
 475                 if ((flags & PFI_AFLAG_PEER) &&
 476                     !(ifp->if_flags & IFF_POINTOPOINT)) {
 477                         IFA_UNLOCK(ia);
 478                         continue;
 479                 }
 480                 if ((af == AF_INET6) &&
 481                     IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
 482                     (void *)ia->ifa_addr)->sin6_addr)) {
 483                         IFA_UNLOCK(ia);
 484                         continue;
 485                 }
 486                 if ((af == AF_INET6) &&
 487                     (((struct in6_ifaddr *)ia)->ia6_flags &
 488                     (IN6_IFF_ANYCAST | IN6_IFF_NOTREADY | IN6_IFF_DETACHED |
 489                     IN6_IFF_CLAT46 | IN6_IFF_TEMPORARY | IN6_IFF_DEPRECATED))) {
 490                         IFA_UNLOCK(ia);
 491                         continue;
 492                 }
 493                 if (flags & PFI_AFLAG_NOALIAS) {
 494                         if (af == AF_INET && got4) {
 495                                 IFA_UNLOCK(ia);
 496                                 continue;
 497                         }
 498                         if (af == AF_INET6 && got6) {
 499                                 IFA_UNLOCK(ia);
 500                                 continue;
 501                         }
 502                 }
 503                 if (af == AF_INET) {
 504                         got4 = 1;
 505                 } else if (af == AF_INET6) {
 506                         got6 = 1;
 507                 }
 508                 net2 = net;
 509                 if (net2 == 128 && (flags & PFI_AFLAG_NETWORK)) {
 510                         if (af == AF_INET) {
 511                                 net2 = pfi_unmask(&((struct sockaddr_in *)
 512                                     (void *)ia->ifa_netmask)->sin_addr);
 513                         } else if (af == AF_INET6) {
 514                                 net2 = pfi_unmask(&((struct sockaddr_in6 *)
 515                                     (void *)ia->ifa_netmask)->sin6_addr);
 516                         }
 517                 }
 518                 if (af == AF_INET && net2 > 32) {
 519                         net2 = 32;
 520                 }
 521                 if (flags & PFI_AFLAG_BROADCAST) {
 522                         pfi_address_add(ia->ifa_broadaddr, af, net2);
 523                 } else if (flags & PFI_AFLAG_PEER) {
 524                         pfi_address_add(ia->ifa_dstaddr, af, net2);
 525                 } else {
 526                         pfi_address_add(ia->ifa_addr, af, net2);
 527                 }
 528                 IFA_UNLOCK(ia);
 529         }
 530         ifnet_lock_done(ifp);
 531 }
 532
 533 void
 534 pfi_address_add(struct sockaddr *sa, uint8_t af, uint8_t net)
 535 {
 536         struct pfr_addr *p;
 537         int              i;
 538
 539         if (pfi_buffer_cnt >= pfi_buffer_max) {
 540                 int              new_max = pfi_buffer_max * 2;
 541
 542                 if (new_max > PFI_BUFFER_MAX) {
 543                         printf("pfi_address_add: address buffer full (%d/%d)\n",
 544                             pfi_buffer_cnt, PFI_BUFFER_MAX);
 545                         return;
 546                 }
 547                 p = _MALLOC(new_max * sizeof(*pfi_buffer), PFI_MTYPE,
 548                     M_WAITOK);
 549                 if (p == NULL) {
 550                         printf("pfi_address_add: no memory to grow buffer "
 551                             "(%d/%d)\n", pfi_buffer_cnt, PFI_BUFFER_MAX);
 552                         return;
 553                 }
 554                 memcpy(p, pfi_buffer, pfi_buffer_max * sizeof(*pfi_buffer));
 555                 /* no need to zero buffer */
 556                 _FREE(pfi_buffer, PFI_MTYPE);
 557                 pfi_buffer = p;
 558                 pfi_buffer_max = new_max;
 559         }
 560         if (af == AF_INET && net > 32) {
 561                 net = 128;
 562         }
 563         p = pfi_buffer + pfi_buffer_cnt++;
 564         bzero(p, sizeof(*p));
 565         p->pfra_af = af;
 566         p->pfra_net = net;
 567         if (af == AF_INET) {
 568                 p->pfra_ip4addr = ((struct sockaddr_in *)(void *)sa)->sin_addr;
 569         } else if (af == AF_INET6) {
 570                 p->pfra_ip6addr =
 571                     ((struct sockaddr_in6 *)(void *)sa)->sin6_addr;
 572                 if (IN6_IS_SCOPE_EMBED(&p->pfra_ip6addr)) {
 573                         p->pfra_ip6addr.s6_addr16[1] = 0;
 574                 }
 575         }
 576         /* mask network address bits */
 577         if (net < 128) {
 578                 ((caddr_t)p)[p->pfra_net / 8] &= ~(0xFF >> (p->pfra_net % 8));
 579         }
 580         for (i = (p->pfra_net + 7) / 8; i < (int)sizeof(p->pfra_u); i++) {
 581                 ((caddr_t)p)[i] = 0;
 582         }
 583 }
 584
 585 void
 586 pfi_dynaddr_remove(struct pf_addr_wrap *aw)
 587 {
 588         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 589             aw->p.dyn->pfid_kif == NULL || aw->p.dyn->pfid_kt == NULL) {
 590                 return;
 591         }
 592
 593         TAILQ_REMOVE(&aw->p.dyn->pfid_kif->pfik_dynaddrs, aw->p.dyn, entry);
 594         pfi_kif_unref(aw->p.dyn->pfid_kif, PFI_KIF_REF_RULE);
 595         aw->p.dyn->pfid_kif = NULL;
 596         pfr_detach_table(aw->p.dyn->pfid_kt);
 597         aw->p.dyn->pfid_kt = NULL;
 598         pool_put(&pfi_addr_pl, aw->p.dyn);
 599         aw->p.dyn = NULL;
 600 }
 601
 602 void
 603 pfi_dynaddr_copyout(struct pf_addr_wrap *aw)
 604 {
 605         if (aw->type != PF_ADDR_DYNIFTL || aw->p.dyn == NULL ||
 606             aw->p.dyn->pfid_kif == NULL) {
 607                 return;
 608         }
 609         aw->p.dyncnt = aw->p.dyn->pfid_acnt4 + aw->p.dyn->pfid_acnt6;
 610 }
 611
 612 void
 613 pfi_kifaddr_update(void *v)
 614 {
 615         struct pfi_kif          *kif = (struct pfi_kif *)v;
 616
 617         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 618
 619         pfi_update++;
 620         pfi_kif_update(kif);
 621 }
 622
 623 int
 624 pfi_if_compare(struct pfi_kif *p, struct pfi_kif *q)
 625 {
 626         return strncmp(p->pfik_name, q->pfik_name, IFNAMSIZ - 1);
 627 }
 628
 629 void
 630 pfi_update_status(const char *name, struct pf_status *pfs)
 631 {
 632         struct pfi_kif          *p;
 633         struct pfi_kif       key;
 634         int                      i, j, k;
 635
 636         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 637
 638         bzero(&key.pfik_name, sizeof(key.pfik_name));
 639         strlcpy(key.pfik_name, name, sizeof(key.pfik_name));
 640         p = RB_FIND(pfi_ifhead, &pfi_ifs, &key);
 641         if (p == NULL) {
 642                 return;
 643         }
 644
 645         if (pfs != NULL) {
 646                 bzero(pfs->pcounters, sizeof(pfs->pcounters));
 647                 bzero(pfs->bcounters, sizeof(pfs->bcounters));
 648                 for (i = 0; i < 2; i++) {
 649                         for (j = 0; j < 2; j++) {
 650                                 for (k = 0; k < 2; k++) {
 651                                         pfs->pcounters[i][j][k] +=
 652                                             p->pfik_packets[i][j][k];
 653                                         pfs->bcounters[i][j] +=
 654                                             p->pfik_bytes[i][j][k];
 655                                 }
 656                         }
 657                 }
 658         } else {
 659                 /* just clear statistics */
 660                 bzero(p->pfik_packets, sizeof(p->pfik_packets));
 661                 bzero(p->pfik_bytes, sizeof(p->pfik_bytes));
 662                 p->pfik_tzero = pf_calendar_time_second();
 663         }
 664 }
 665
 666 int
 667 pfi_get_ifaces(const char *name, user_addr_t buf, int *size)
 668 {
 669         struct pfi_kif   *p, *nextp;
 670         int              n = 0;
 671
 672         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 673
 674         for (p = RB_MIN(pfi_ifhead, &pfi_ifs); p; p = nextp) {
 675                 nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 676                 if (pfi_skip_if(name, p)) {
 677                         continue;
 678                 }
 679                 if (*size > n++) {
 680                         struct pfi_uif u;
 681
 682                         if (!p->pfik_tzero) {
 683                                 p->pfik_tzero = pf_calendar_time_second();
 684                         }
 685                         pfi_kif_ref(p, PFI_KIF_REF_RULE);
 686
 687                         /* return the user space version of pfi_kif */
 688                         bzero(&u, sizeof(u));
 689                         bcopy(p->pfik_name, &u.pfik_name, sizeof(u.pfik_name));
 690                         bcopy(p->pfik_packets, &u.pfik_packets,
 691                             sizeof(u.pfik_packets));
 692                         bcopy(p->pfik_bytes, &u.pfik_bytes,
 693                             sizeof(u.pfik_bytes));
 694                         u.pfik_tzero = p->pfik_tzero;
 695                         u.pfik_flags = p->pfik_flags;
 696                         u.pfik_states = p->pfik_states;
 697                         u.pfik_rules = p->pfik_rules;
 698
 699                         if (copyout(&u, buf, sizeof(u))) {
 700                                 pfi_kif_unref(p, PFI_KIF_REF_RULE);
 701                                 return EFAULT;
 702                         }
 703                         buf += sizeof(u);
 704                         nextp = RB_NEXT(pfi_ifhead, &pfi_ifs, p);
 705                         pfi_kif_unref(p, PFI_KIF_REF_RULE);
 706                 }
 707         }
 708         *size = n;
 709         return 0;
 710 }
 711
 712 int
 713 pfi_skip_if(const char *filter, struct pfi_kif *p)
 714 {
 715         size_t     n;
 716
 717         if (filter == NULL || !*filter) {
 718                 return 0;
 719         }
 720         if (strcmp(p->pfik_name, filter) == 0) {
 721                 return 0;     /* exact match */
 722         }
 723         n = strlen(filter);
 724         if (n < 1 || n >= IFNAMSIZ) {
 725                 return 1;     /* sanity check */
 726         }
 727         if (filter[n - 1] >= '0' && filter[n - 1] <= '9') {
 728                 return 1;     /* only do exact match in that case */
 729         }
 730         if (strncmp(p->pfik_name, filter, n)) {
 731                 return 1;     /* prefix doesn't match */
 732         }
 733         return p->pfik_name[n] < '0' || p->pfik_name[n] > '9';
 734 }
 735
 736 int
 737 pfi_set_flags(const char *name, int flags)
 738 {
 739         struct pfi_kif  *p;
 740
 741         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 742
 743         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 744                 if (pfi_skip_if(name, p)) {
 745                         continue;
 746                 }
 747                 p->pfik_flags |= flags;
 748         }
 749         return 0;
 750 }
 751
 752 int
 753 pfi_clear_flags(const char *name, int flags)
 754 {
 755         struct pfi_kif  *p;
 756
 757         LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
 758
 759         RB_FOREACH(p, pfi_ifhead, &pfi_ifs) {
 760                 if (pfi_skip_if(name, p)) {
 761                         continue;
 762                 }
 763                 p->pfik_flags &= ~flags;
 764         }
 765         return 0;
 766 }
 767
 768 /* from pf_print_state.c */
 769 uint8_t
 770 pfi_unmask(void *addr)
 771 {
 772         struct pf_addr *m = addr;
 773         int i = 31, j = 0, b = 0;
 774         u_int32_t tmp;
 775
 776         while (j < 4 && m->addr32[j] == 0xffffffff) {
 777                 b += 32;
 778                 j++;
 779         }
 780         if (j < 4) {
 781                 tmp = ntohl(m->addr32[j]);
 782                 for (i = 31; tmp & (1 << i); --i) {
 783                         b++;
 784                 }
 785         }
 786         VERIFY(b >= 0 && b <= UINT8_MAX);
 787         return (uint8_t)b;
 788 }