redirects.c

   1 /*
   2  * firewall3 - 3rd OpenWrt UCI firewall implementation
   3  *
   4  *   Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include "redirects.h"
  20
  21
  22 const struct fw3_option fw3_redirect_opts[] = {
  23         FW3_OPT("enabled",             bool,      redirect,     enabled),
  24
  25         FW3_OPT("name",                string,    redirect,     name),
  26         FW3_OPT("family",              family,    redirect,     family),
  27
  28         FW3_OPT("src",                 device,    redirect,     src),
  29         FW3_OPT("dest",                device,    redirect,     dest),
  30
  31         FW3_OPT("ipset",               setmatch,  redirect,     ipset),
  32
  33         FW3_LIST("proto",              protocol,  redirect,     proto),
  34
  35         FW3_OPT("src_ip",              network,   redirect,     ip_src),
  36         FW3_LIST("src_mac",            mac,       redirect,     mac_src),
  37         FW3_OPT("src_port",            port,      redirect,     port_src),
  38
  39         FW3_OPT("src_dip",             network,   redirect,     ip_dest),
  40         FW3_OPT("src_dport",           port,      redirect,     port_dest),
  41
  42         FW3_OPT("dest_ip",             network,   redirect,     ip_redir),
  43         FW3_OPT("dest_port",           port,      redirect,     port_redir),
  44
  45         FW3_OPT("extra",               string,    redirect,     extra),
  46
  47         FW3_OPT("limit",               limit,     redirect,     limit),
  48         FW3_OPT("limit_burst",         int,       redirect,     limit.burst),
  49
  50         FW3_OPT("utc_time",            bool,      redirect,     time.utc),
  51         FW3_OPT("start_date",          date,      redirect,     time.datestart),
  52         FW3_OPT("stop_date",           date,      redirect,     time.datestop),
  53         FW3_OPT("start_time",          time,      redirect,     time.timestart),
  54         FW3_OPT("stop_time",           time,      redirect,     time.timestop),
  55         FW3_OPT("weekdays",            weekdays,  redirect,     time.weekdays),
  56         FW3_OPT("monthdays",           monthdays, redirect,     time.monthdays),
  57
  58         FW3_OPT("mark",                mark,      redirect,     mark),
  59
  60         FW3_OPT("reflection",          bool,      redirect,     reflection),
  61         FW3_OPT("reflection_src",      reflection_source,
  62                                                   redirect,     reflection_src),
  63
  64         FW3_OPT("target",              target,    redirect,     target),
  65
  66         { }
  67 };
  68
  69
  70 static bool
  71 check_families(struct uci_element *e, struct fw3_redirect *r)
  72 {
  73         if (r->family == FW3_FAMILY_ANY)
  74                 return true;
  75
  76         if (r->_src && r->_src->family && r->_src->family != r->family)
  77         {
  78                 warn_elem(e, "refers to source zone with different family");
  79                 return false;
  80         }
  81
  82         if (r->_dest && r->_dest->family && r->_dest->family != r->family)
  83         {
  84                 warn_elem(e, "refers to destination zone with different family");
  85                 return false;
  86         }
  87
  88         if (r->ipset.ptr && r->ipset.ptr->family &&
  89             r->ipset.ptr->family != r->family)
  90         {
  91                 warn_elem(e, "refers to ipset with different family");
  92                 return false;
  93         }
  94
  95         if (r->ip_src.family && r->ip_src.family != r->family)
  96         {
  97                 warn_elem(e, "uses source ip with different family");
  98                 return false;
  99         }
 100
 101         if (r->ip_dest.family && r->ip_dest.family != r->family)
 102         {
 103                 warn_elem(e, "uses destination ip with different family");
 104                 return false;
 105         }
 106
 107         if (r->ip_redir.family && r->ip_redir.family != r->family)
 108         {
 109                 warn_elem(e, "uses redirect ip with different family");
 110                 return false;
 111         }
 112
 113         return true;
 114 }
 115
 116 static bool
 117 compare_addr(struct fw3_address *a, struct fw3_address *b)
 118 {
 119         uint32_t mask;
 120
 121         if (a->family != FW3_FAMILY_V4 || b->family != FW3_FAMILY_V4)
 122                 return false;
 123
 124         mask = htonl(~((1 << (32 - a->mask)) - 1));
 125
 126         return ((a->address.v4.s_addr & mask) == (b->address.v4.s_addr & mask));
 127 }
 128
 129 static bool
 130 resolve_dest(struct uci_element *e, struct fw3_redirect *redir,
 131              struct fw3_state *state)
 132 {
 133         struct fw3_zone *zone;
 134         struct fw3_address *addr;
 135         struct list_head *addrs;
 136
 137         if (!redir->ip_redir.set)
 138                 return false;
 139
 140         list_for_each_entry(zone, &state->zones, list)
 141         {
 142                 addrs = fw3_resolve_zone_addresses(zone);
 143
 144                 if (!addrs)
 145                         continue;
 146
 147                 list_for_each_entry(addr, addrs, list)
 148                 {
 149                         if (!compare_addr(addr, &redir->ip_redir))
 150                                 continue;
 151
 152                         strncpy(redir->dest.name, zone->name, sizeof(redir->dest.name));
 153                         redir->dest.set = true;
 154                         redir->_dest = zone;
 155
 156                         break;
 157                 }
 158
 159                 fw3_free_list(addrs);
 160
 161                 if (redir->_dest)
 162                         return true;
 163         }
 164
 165         return false;
 166 }
 167
 168 static bool
 169 check_local(struct uci_element *e, struct fw3_redirect *redir,
 170             struct fw3_state *state)
 171 {
 172         struct fw3_zone *zone;
 173         struct fw3_device *net;
 174         struct fw3_address *addr;
 175         struct list_head *addrs;
 176
 177         if (redir->target != FW3_FLAG_DNAT)
 178                 return false;
 179
 180         if (!redir->ip_redir.set)
 181                 redir->local = true;
 182
 183         if (redir->local)
 184                 return true;
 185
 186         list_for_each_entry(zone, &state->zones, list)
 187         {
 188                 list_for_each_entry(net, &zone->networks, list)
 189                 {
 190                         addrs = fw3_ubus_address(net->name);
 191
 192                         if (!addrs)
 193                                 continue;
 194
 195                         list_for_each_entry(addr, addrs, list)
 196                         {
 197                                 if (!compare_addr(&redir->ip_redir, addr))
 198                                         continue;
 199
 200                                 warn_elem(e, "refers to a destination address on this router, "
 201                                              "assuming port redirection");
 202
 203                                 redir->local = true;
 204                                 break;
 205                         }
 206
 207                         fw3_free_list(addrs);
 208
 209                         if (redir->local)
 210                                 return true;
 211                 }
 212         }
 213
 214         return false;
 215 }
 216
 217 void
 218 fw3_load_redirects(struct fw3_state *state, struct uci_package *p)
 219 {
 220         struct uci_section *s;
 221         struct uci_element *e;
 222         struct fw3_redirect *redir;
 223
 224         bool valid;
 225
 226         INIT_LIST_HEAD(&state->redirects);
 227
 228         uci_foreach_element(&p->sections, e)
 229         {
 230                 s = uci_to_section(e);
 231
 232                 if (strcmp(s->type, "redirect"))
 233                         continue;
 234
 235                 redir = malloc(sizeof(*redir));
 236
 237                 if (!redir)
 238                         continue;
 239
 240                 memset(redir, 0, sizeof(*redir));
 241
 242                 INIT_LIST_HEAD(&redir->proto);
 243                 INIT_LIST_HEAD(&redir->mac_src);
 244
 245                 redir->enabled = true;
 246                 redir->reflection = true;
 247
 248                 valid = false;
 249
 250                 fw3_parse_options(redir, fw3_redirect_opts, s);
 251
 252                 if (!redir->enabled)
 253                 {
 254                         fw3_free_redirect(redir);
 255                         continue;
 256                 }
 257
 258                 if (redir->src.invert)
 259                 {
 260                         warn_elem(e, "must not have an inverted source");
 261                         fw3_free_redirect(redir);
 262                         continue;
 263                 }
 264                 else if (redir->src.set && !redir->src.any &&
 265                          !(redir->_src = fw3_lookup_zone(state, redir->src.name)))
 266                 {
 267                         warn_elem(e, "refers to not existing zone '%s'", redir->src.name);
 268                         fw3_free_redirect(redir);
 269                         continue;
 270                 }
 271                 else if (redir->dest.set && !redir->dest.any &&
 272                          !(redir->_dest = fw3_lookup_zone(state, redir->dest.name)))
 273                 {
 274                         warn_elem(e, "refers to not existing zone '%s'", redir->dest.name);
 275                         fw3_free_redirect(redir);
 276                         continue;
 277                 }
 278                 else if (redir->ipset.set && state->disable_ipsets)
 279                 {
 280                         warn_elem(e, "skipped due to disabled ipset support");
 281                         fw3_free_redirect(redir);
 282                         continue;
 283                 }
 284                 else if (redir->ipset.set &&
 285                          !(redir->ipset.ptr = fw3_lookup_ipset(state, redir->ipset.name)))
 286                 {
 287                         warn_elem(e, "refers to unknown ipset '%s'", redir->ipset.name);
 288                         fw3_free_redirect(redir);
 289                         continue;
 290                 }
 291
 292                 if (!check_families(e, redir))
 293                 {
 294                         fw3_free_redirect(redir);
 295                         continue;
 296                 }
 297
 298                 if (redir->target == FW3_FLAG_UNSPEC)
 299                 {
 300                         warn_elem(e, "has no target specified, defaulting to DNAT");
 301                         redir->target = FW3_FLAG_DNAT;
 302                 }
 303                 else if (redir->target < FW3_FLAG_DNAT)
 304                 {
 305                         warn_elem(e, "has invalid target specified, defaulting to DNAT");
 306                         redir->target = FW3_FLAG_DNAT;
 307                 }
 308
 309                 if (redir->target == FW3_FLAG_DNAT)
 310                 {
 311                         if (redir->src.any)
 312                                 warn_elem(e, "must not have source '*' for DNAT target");
 313                         else if (!redir->_src)
 314                                 warn_elem(e, "has no source specified");
 315                         else
 316                         {
 317                                 set(redir->_src->flags, FW3_FAMILY_V4, redir->target);
 318                                 redir->_src->conntrack = true;
 319                                 valid = true;
 320                         }
 321
 322                         if (!check_local(e, redir, state) && !redir->dest.set &&
 323                             resolve_dest(e, redir, state))
 324                         {
 325                                 warn_elem(e, "does not specify a destination, assuming '%s'",
 326                                           redir->dest.name);
 327                         }
 328
 329                         if (redir->reflection && redir->_dest && redir->_src->masq)
 330                         {
 331                                 set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_ACCEPT);
 332                                 set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_DNAT);
 333                                 set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_SNAT);
 334                         }
 335                 }
 336                 else
 337                 {
 338                         if (redir->dest.any)
 339                                 warn_elem(e, "must not have destination '*' for SNAT target");
 340                         else if (!redir->_dest)
 341                                 warn_elem(e, "has no destination specified");
 342                         else if (!redir->ip_dest.set)
 343                                 warn_elem(e, "has no src_dip option specified");
 344                         else if (!list_empty(&redir->mac_src))
 345                                 warn_elem(e, "must not use 'src_mac' option for SNAT target");
 346                         else
 347                         {
 348                                 set(redir->_dest->flags, FW3_FAMILY_V4, redir->target);
 349                                 redir->_dest->conntrack = true;
 350                                 valid = true;
 351                         }
 352                 }
 353
 354                 if (list_empty(&redir->proto))
 355                 {
 356                         warn_elem(e, "does not specify a protocol, assuming TCP+UDP");
 357                         fw3_parse_protocol(&redir->proto, "tcpudp", true);
 358                 }
 359
 360                 if (!valid)
 361                 {
 362                         fw3_free_redirect(redir);
 363                         continue;
 364                 }
 365
 366                 if (!redir->port_redir.set)
 367                         redir->port_redir = redir->port_dest;
 368
 369                 list_add_tail(&redir->list, &state->redirects);
 370         }
 371 }
 372
 373 static void
 374 append_chain_nat(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
 375 {
 376         if (redir->target == FW3_FLAG_DNAT)
 377                 fw3_ipt_rule_append(r, "zone_%s_prerouting", redir->src.name);
 378         else
 379                 fw3_ipt_rule_append(r, "zone_%s_postrouting", redir->dest.name);
 380 }
 381
 382 static void
 383 set_snat_dnat(struct fw3_ipt_rule *r, enum fw3_flag target,
 384               struct fw3_address *addr, struct fw3_port *port)
 385 {
 386         char buf[sizeof("255.255.255.255:65535-65535\0")];
 387
 388         buf[0] = '\0';
 389
 390         if (addr && addr->set)
 391         {
 392                 inet_ntop(AF_INET, &addr->address.v4, buf, sizeof(buf));
 393         }
 394
 395         if (port && port->set)
 396         {
 397                 if (port->port_min == port->port_max)
 398                         sprintf(buf + strlen(buf), ":%u", port->port_min);
 399                 else
 400                         sprintf(buf + strlen(buf), ":%u-%u",
 401                                 port->port_min, port->port_max);
 402         }
 403
 404         if (target == FW3_FLAG_DNAT)
 405         {
 406                 fw3_ipt_rule_target(r, "DNAT");
 407                 fw3_ipt_rule_addarg(r, false, "--to-destination", buf);
 408         }
 409         else
 410         {
 411                 fw3_ipt_rule_target(r, "SNAT");
 412                 fw3_ipt_rule_addarg(r, false, "--to-source", buf);
 413         }
 414 }
 415
 416 static void
 417 set_target_nat(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
 418 {
 419         if (redir->target == FW3_FLAG_DNAT)
 420                 set_snat_dnat(r, redir->target, &redir->ip_redir, &redir->port_redir);
 421         else
 422                 set_snat_dnat(r, redir->target, &redir->ip_dest, &redir->port_dest);
 423 }
 424
 425 static void
 426 append_chain_filter(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
 427 {
 428         if (redir->target == FW3_FLAG_DNAT)
 429         {
 430                 if (redir->local)
 431                         fw3_ipt_rule_append(r, "zone_%s_input", redir->src.name);
 432                 else
 433                         fw3_ipt_rule_append(r, "zone_%s_forward", redir->src.name);
 434         }
 435         else
 436         {
 437                 if (redir->src.set && !redir->src.any)
 438                         fw3_ipt_rule_append(r, "zone_%s_forward", redir->src.name);
 439                 else
 440                         fw3_ipt_rule_append(r, "delegate_forward");
 441         }
 442 }
 443
 444 static void
 445 set_target_filter(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
 446 {
 447         if (redir->local)
 448                 fw3_ipt_rule_extra(r, "-m conntrack --ctstate DNAT");
 449
 450         fw3_ipt_rule_target(r, "ACCEPT");
 451 }
 452
 453 static void
 454 set_comment(struct fw3_ipt_rule *r, const char *name, int num, bool ref)
 455 {
 456         if (name)
 457         {
 458                 if (ref)
 459                         fw3_ipt_rule_comment(r, "%s (reflection)", name);
 460                 else
 461                         fw3_ipt_rule_comment(r, name);
 462         }
 463         else
 464         {
 465                 if (ref)
 466                         fw3_ipt_rule_comment(r, "@redirect[%u] (reflection)", num);
 467                 else
 468                         fw3_ipt_rule_comment(r, "@redirect[%u]", num);
 469         }
 470 }
 471
 472 static void
 473 print_redirect(struct fw3_ipt_handle *h, struct fw3_state *state,
 474                struct fw3_redirect *redir, int num,
 475                struct fw3_protocol *proto, struct fw3_mac *mac)
 476 {
 477         struct fw3_ipt_rule *r;
 478         struct fw3_address *src, *dst;
 479         struct fw3_port *spt, *dpt;
 480
 481         switch (h->table)
 482         {
 483         case FW3_TABLE_NAT:
 484                 src = &redir->ip_src;
 485                 dst = &redir->ip_dest;
 486                 spt = &redir->port_src;
 487                 dpt = &redir->port_dest;
 488
 489                 if (redir->target == FW3_FLAG_SNAT)
 490                 {
 491                         dst = &redir->ip_redir;
 492                         dpt = &redir->port_redir;
 493                 }
 494
 495                 r = fw3_ipt_rule_create(h, proto, NULL, NULL, src, dst);
 496                 fw3_ipt_rule_sport_dport(r, spt, dpt);
 497                 fw3_ipt_rule_mac(r, mac);
 498                 fw3_ipt_rule_ipset(r, &redir->ipset);
 499                 fw3_ipt_rule_limit(r, &redir->limit);
 500                 fw3_ipt_rule_time(r, &redir->time);
 501                 fw3_ipt_rule_mark(r, &redir->mark);
 502                 set_target_nat(r, redir);
 503                 fw3_ipt_rule_extra(r, redir->extra);
 504                 set_comment(r, redir->name, num, false);
 505                 append_chain_nat(r, redir);
 506                 break;
 507
 508         case FW3_TABLE_FILTER:
 509                 src = &redir->ip_src;
 510                 dst = &redir->ip_redir;
 511                 spt = &redir->port_src;
 512                 dpt = &redir->port_redir;
 513
 514                 r = fw3_ipt_rule_create(h, proto, NULL, NULL, src, dst);
 515                 fw3_ipt_rule_sport_dport(r, spt, dpt);
 516                 fw3_ipt_rule_mac(r, mac);
 517                 fw3_ipt_rule_ipset(r, &redir->ipset);
 518                 fw3_ipt_rule_limit(r, &redir->limit);
 519                 fw3_ipt_rule_time(r, &redir->time);
 520                 fw3_ipt_rule_mark(r, &redir->mark);
 521                 set_target_filter(r, redir);
 522                 fw3_ipt_rule_extra(r, redir->extra);
 523                 set_comment(r, redir->name, num, false);
 524                 append_chain_filter(r, redir);
 525                 break;
 526
 527         default:
 528                 break;
 529         }
 530 }
 531
 532 static void
 533 print_reflection(struct fw3_ipt_handle *h, struct fw3_state *state,
 534                  struct fw3_redirect *redir, int num,
 535                  struct fw3_protocol *proto, struct fw3_address *ra,
 536                  struct fw3_address *ia, struct fw3_address *ea)
 537 {
 538         struct fw3_ipt_rule *r;
 539
 540         switch (h->table)
 541         {
 542         case FW3_TABLE_NAT:
 543                 r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, ea);
 544                 fw3_ipt_rule_sport_dport(r, NULL, &redir->port_dest);
 545                 fw3_ipt_rule_limit(r, &redir->limit);
 546                 fw3_ipt_rule_time(r, &redir->time);
 547                 set_comment(r, redir->name, num, true);
 548                 set_snat_dnat(r, FW3_FLAG_DNAT, &redir->ip_redir, &redir->port_redir);
 549                 fw3_ipt_rule_append(r, "zone_%s_prerouting", redir->dest.name);
 550
 551                 r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, &redir->ip_redir);
 552                 fw3_ipt_rule_sport_dport(r, NULL, &redir->port_redir);
 553                 fw3_ipt_rule_limit(r, &redir->limit);
 554                 fw3_ipt_rule_time(r, &redir->time);
 555                 set_comment(r, redir->name, num, true);
 556                 set_snat_dnat(r, FW3_FLAG_SNAT, ra, NULL);
 557                 fw3_ipt_rule_append(r, "zone_%s_postrouting", redir->dest.name);
 558                 break;
 559
 560         case FW3_TABLE_FILTER:
 561                 r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, &redir->ip_redir);
 562                 fw3_ipt_rule_sport_dport(r, NULL, &redir->port_redir);
 563                 fw3_ipt_rule_limit(r, &redir->limit);
 564                 fw3_ipt_rule_time(r, &redir->time);
 565                 set_comment(r, redir->name, num, true);
 566                 fw3_ipt_rule_target(r, "zone_%s_dest_ACCEPT", redir->dest.name);
 567                 fw3_ipt_rule_append(r, "zone_%s_forward", redir->dest.name);
 568                 break;
 569
 570         default:
 571                 break;
 572         }
 573 }
 574
 575 static void
 576 expand_redirect(struct fw3_ipt_handle *handle, struct fw3_state *state,
 577                 struct fw3_redirect *redir, int num)
 578 {
 579         struct list_head *ext_addrs, *int_addrs;
 580         struct fw3_address *ext_addr, *int_addr, ref_addr;
 581         struct fw3_protocol *proto;
 582         struct fw3_mac *mac;
 583
 584         if (redir->name)
 585                 info("   * Redirect '%s'", redir->name);
 586         else
 587                 info("   * Redirect #%u", num);
 588
 589         if (!fw3_is_family(redir->_src, handle->family) ||
 590                 !fw3_is_family(redir->_dest, handle->family))
 591         {
 592                 info("     ! Skipping due to different family of zone");
 593                 return;
 594         }
 595
 596         if (!fw3_is_family(&redir->ip_src, handle->family) ||
 597             !fw3_is_family(&redir->ip_dest, handle->family) ||
 598                 !fw3_is_family(&redir->ip_redir, handle->family))
 599         {
 600                 if (!redir->ip_src.resolved ||
 601                     !redir->ip_dest.resolved ||
 602                     !redir->ip_redir.resolved)
 603                         info("     ! Skipping due to different family of ip address");
 604
 605                 return;
 606         }
 607
 608         if (redir->ipset.ptr)
 609         {
 610                 if (!fw3_is_family(redir->ipset.ptr, handle->family))
 611                 {
 612                         info("     ! Skipping due to different family in ipset");
 613                         return;
 614                 }
 615
 616                 if (!fw3_check_ipset(redir->ipset.ptr))
 617                 {
 618                         info("     ! Skipping due to missing ipset '%s'",
 619                              redir->ipset.ptr->external ?
 620                                         redir->ipset.ptr->external : redir->ipset.ptr->name);
 621                         return;
 622                 }
 623
 624                 set(redir->ipset.ptr->flags, handle->family, handle->family);
 625         }
 626
 627         fw3_foreach(proto, &redir->proto)
 628         fw3_foreach(mac, &redir->mac_src)
 629                 print_redirect(handle, state, redir, num, proto, mac);
 630
 631         /* reflection rules */
 632         if (redir->target != FW3_FLAG_DNAT || !redir->reflection)
 633                 return;
 634
 635         if (!redir->_dest || !redir->_src->masq)
 636                 return;
 637
 638         ext_addrs = fw3_resolve_zone_addresses(redir->_src);
 639         int_addrs = fw3_resolve_zone_addresses(redir->_dest);
 640
 641         if (!ext_addrs || !int_addrs)
 642                 goto out;
 643
 644         list_for_each_entry(ext_addr, ext_addrs, list)
 645         {
 646                 if (!fw3_is_family(ext_addr, handle->family))
 647                         continue;
 648
 649                 list_for_each_entry(int_addr, int_addrs, list)
 650                 {
 651                         if (!fw3_is_family(int_addr, handle->family))
 652                                 continue;
 653
 654                         fw3_foreach(proto, &redir->proto)
 655                         {
 656                                 if (!proto || (proto->protocol != 6 && proto->protocol != 17))
 657                                         continue;
 658
 659                                 if (redir->reflection_src == FW3_REFLECTION_INTERNAL)
 660                                         ref_addr = *int_addr;
 661                                 else
 662                                         ref_addr = *ext_addr;
 663
 664                                 ref_addr.mask = 32;
 665                                 ext_addr->mask = 32;
 666
 667                                 print_reflection(handle, state, redir, num, proto,
 668                                                                  &ref_addr, int_addr, ext_addr);
 669                         }
 670                 }
 671         }
 672
 673 out:
 674         fw3_free_list(ext_addrs);
 675         fw3_free_list(int_addrs);
 676 }
 677
 678 void
 679 fw3_print_redirects(struct fw3_ipt_handle *handle, struct fw3_state *state)
 680 {
 681         int num = 0;
 682         struct fw3_redirect *redir;
 683
 684         if (handle->family == FW3_FAMILY_V6)
 685                 return;
 686
 687         if (handle->table != FW3_TABLE_FILTER && handle->table != FW3_TABLE_NAT)
 688                 return;
 689
 690         list_for_each_entry(redir, &state->redirects, list)
 691                 expand_redirect(handle, state, redir, num++);
 692 }