options.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 "options.h"
  20 #include "ubus.h"
  21
  22
  23 static bool
  24 put_value(void *ptr, void *val, int elem_size, bool is_list)
  25 {
  26         void *copy;
  27
  28         if (is_list)
  29         {
  30                 copy = malloc(elem_size);
  31
  32                 if (!copy)
  33                         return false;
  34
  35                 memcpy(copy, val, elem_size);
  36                 list_add_tail((struct list_head *)copy, (struct list_head *)ptr);
  37                 return true;
  38         }
  39
  40         memcpy(ptr, val, elem_size);
  41         return false;
  42 }
  43
  44 static bool
  45 parse_enum(void *ptr, const char *val, const char **values, int min, int max)
  46 {
  47         int i, l = strlen(val);
  48
  49         if (l > 0)
  50         {
  51                 for (i = 0; i <= (max - min); i++)
  52                 {
  53                         if (!strncasecmp(val, values[i], l))
  54                         {
  55                                 *((int *)ptr) = min + i;
  56                                 return true;
  57                         }
  58                 }
  59         }
  60
  61         return false;
  62 }
  63
  64
  65 const char *fw3_flag_names[__FW3_FLAG_MAX] = {
  66         "filter",
  67         "nat",
  68         "mangle",
  69         "raw",
  70
  71         "IPv4",
  72         "IPv6",
  73
  74         "ACCEPT",
  75         "REJECT",
  76         "DROP",
  77         "NOTRACK",
  78         "MARK",
  79         "DNAT",
  80         "SNAT",
  81
  82         "ACCEPT",
  83         "REJECT",
  84         "DROP",
  85 };
  86
  87 const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX] = {
  88         "second",
  89         "minute",
  90         "hour",
  91         "day",
  92 };
  93
  94 const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX] = {
  95         "(bug)",
  96         "bitmap",
  97         "hash",
  98         "list",
  99 };
 100
 101 const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX] = {
 102         "(bug)",
 103         "ip",
 104         "port",
 105         "mac",
 106         "net",
 107         "set",
 108 };
 109
 110 static const char *weekdays[] = {
 111         "monday",
 112         "tuesday",
 113         "wednesday",
 114         "thursday",
 115         "friday",
 116         "saturday",
 117         "sunday",
 118 };
 119
 120 static const char *include_types[] = {
 121         "script",
 122         "restore",
 123 };
 124
 125 static const char *reflection_sources[] = {
 126         "internal",
 127         "external",
 128 };
 129
 130
 131 bool
 132 fw3_parse_bool(void *ptr, const char *val, bool is_list)
 133 {
 134         if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
 135                 *((bool *)ptr) = true;
 136         else
 137                 *((bool *)ptr) = false;
 138
 139         return true;
 140 }
 141
 142 bool
 143 fw3_parse_int(void *ptr, const char *val, bool is_list)
 144 {
 145         int n = strtol(val, NULL, 0);
 146
 147         if (errno == ERANGE || errno == EINVAL)
 148                 return false;
 149
 150         *((int *)ptr) = n;
 151
 152         return true;
 153 }
 154
 155 bool
 156 fw3_parse_string(void *ptr, const char *val, bool is_list)
 157 {
 158         *((char **)ptr) = (char *)val;
 159         return true;
 160 }
 161
 162 bool
 163 fw3_parse_target(void *ptr, const char *val, bool is_list)
 164 {
 165         return parse_enum(ptr, val, &fw3_flag_names[FW3_FLAG_ACCEPT],
 166                           FW3_FLAG_ACCEPT, FW3_FLAG_SNAT);
 167 }
 168
 169 bool
 170 fw3_parse_limit(void *ptr, const char *val, bool is_list)
 171 {
 172         struct fw3_limit *limit = ptr;
 173         enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
 174         char *e;
 175         int n;
 176
 177         if (*val == '!')
 178         {
 179                 limit->invert = true;
 180                 while (isspace(*++val));
 181         }
 182
 183         n = strtol(val, &e, 10);
 184
 185         if (errno == ERANGE || errno == EINVAL)
 186                 return false;
 187
 188         if (*e && *e++ != '/')
 189                 return false;
 190
 191         if (!strlen(e))
 192                 return false;
 193
 194         if (!parse_enum(&u, e, fw3_limit_units, 0, FW3_LIMIT_UNIT_DAY))
 195                 return false;
 196
 197         limit->rate = n;
 198         limit->unit = u;
 199
 200         return true;
 201 }
 202
 203 bool
 204 fw3_parse_device(void *ptr, const char *val, bool is_list)
 205 {
 206         char *p;
 207         struct fw3_device dev = { };
 208
 209         if (*val == '*')
 210         {
 211                 dev.set = true;
 212                 dev.any = true;
 213                 put_value(ptr, &dev, sizeof(dev), is_list);
 214                 return true;
 215         }
 216
 217         if (*val == '!')
 218         {
 219                 dev.invert = true;
 220                 while (isspace(*++val));
 221         }
 222
 223         if ((p = strchr(val, '@')) != NULL)
 224         {
 225                 *p++ = 0;
 226                 snprintf(dev.network, sizeof(dev.network), "%s", p);
 227         }
 228
 229         if (*val)
 230                 snprintf(dev.name, sizeof(dev.name), "%s", val);
 231         else
 232                 return false;
 233
 234         dev.set = true;
 235         put_value(ptr, &dev, sizeof(dev), is_list);
 236         return true;
 237 }
 238
 239 bool
 240 fw3_parse_address(void *ptr, const char *val, bool is_list)
 241 {
 242         struct fw3_address addr = { };
 243         struct in_addr v4;
 244         struct in6_addr v6;
 245         char *p, *s, *e;
 246         int i, m = -1;
 247
 248         if (*val == '!')
 249         {
 250                 addr.invert = true;
 251                 while (isspace(*++val));
 252         }
 253
 254         s = strdup(val);
 255
 256         if (!s)
 257                 return false;
 258
 259         if ((p = strchr(s, '/')) != NULL)
 260         {
 261                 *p++ = 0;
 262                 m = strtoul(p, &e, 10);
 263
 264                 if ((e == p) || (*e != 0))
 265                 {
 266                         if (strchr(s, ':') || !inet_pton(AF_INET, p, &v4))
 267                         {
 268                                 free(s);
 269                                 return false;
 270                         }
 271
 272                         for (i = 0, m = 32; !(v4.s_addr & 1) && (i < 32); i++)
 273                         {
 274                                 m--;
 275                                 v4.s_addr >>= 1;
 276                         }
 277                 }
 278         }
 279         else if ((p = strchr(s, '-')) != NULL)
 280         {
 281                 *p++ = 0;
 282
 283                 if (inet_pton(AF_INET6, p, &v6))
 284                 {
 285                         addr.family = FW3_FAMILY_V6;
 286                         addr.address2.v6 = v6;
 287                         addr.range = true;
 288                 }
 289                 else if (inet_pton(AF_INET, p, &v4))
 290                 {
 291                         addr.family = FW3_FAMILY_V4;
 292                         addr.address2.v4 = v4;
 293                         addr.range = true;
 294                 }
 295                 else
 296                 {
 297                         free(s);
 298                         return false;
 299                 }
 300         }
 301
 302         if (inet_pton(AF_INET6, s, &v6))
 303         {
 304                 addr.family = FW3_FAMILY_V6;
 305                 addr.address.v6 = v6;
 306                 addr.mask = (m >= 0) ? m : 128;
 307         }
 308         else if (inet_pton(AF_INET, s, &v4))
 309         {
 310                 addr.family = FW3_FAMILY_V4;
 311                 addr.address.v4 = v4;
 312                 addr.mask = (m >= 0) ? m : 32;
 313         }
 314         else
 315         {
 316                 free(s);
 317                 return false;
 318         }
 319
 320         free(s);
 321         addr.set = true;
 322         put_value(ptr, &addr, sizeof(addr), is_list);
 323         return true;
 324 }
 325
 326 bool
 327 fw3_parse_network(void *ptr, const char *val, bool is_list)
 328 {
 329         struct fw3_device dev = { };
 330         struct fw3_address *addr;
 331         struct list_head *addr_list;
 332
 333         if (!fw3_parse_address(ptr, val, is_list))
 334         {
 335                 if (!fw3_parse_device(&dev, val, false))
 336                         return false;
 337
 338                 addr_list = fw3_ubus_address(dev.name);
 339
 340                 if (addr_list)
 341                 {
 342                         list_for_each_entry(addr, addr_list, list)
 343                         {
 344                                 addr->invert = dev.invert;
 345                                 addr->resolved = true;
 346
 347                                 if (!put_value(ptr, addr, sizeof(*addr), is_list))
 348                                         break;
 349                         }
 350
 351                         fw3_free_list(addr_list);
 352                 }
 353         }
 354
 355         return true;
 356 }
 357
 358 bool
 359 fw3_parse_mac(void *ptr, const char *val, bool is_list)
 360 {
 361         struct fw3_mac addr = { };
 362         struct ether_addr *mac;
 363
 364         if (*val == '!')
 365         {
 366                 addr.invert = true;
 367                 while (isspace(*++val));
 368         }
 369
 370         if ((mac = ether_aton(val)) != NULL)
 371         {
 372                 addr.mac = *mac;
 373                 addr.set = true;
 374
 375                 put_value(ptr, &addr, sizeof(addr), is_list);
 376                 return true;
 377         }
 378
 379         return false;
 380 }
 381
 382 bool
 383 fw3_parse_port(void *ptr, const char *val, bool is_list)
 384 {
 385         struct fw3_port range = { };
 386         uint16_t n;
 387         uint16_t m;
 388         char *p;
 389
 390         if (*val == '!')
 391         {
 392                 range.invert = true;
 393                 while (isspace(*++val));
 394         }
 395
 396         n = strtoul(val, &p, 10);
 397
 398         if (errno == ERANGE || errno == EINVAL)
 399                 return false;
 400
 401         if (*p && *p != '-' && *p != ':')
 402                 return false;
 403
 404         if (*p)
 405         {
 406                 m = strtoul(++p, NULL, 10);
 407
 408                 if (errno == ERANGE || errno == EINVAL || m < n)
 409                         return false;
 410
 411                 range.port_min = n;
 412                 range.port_max = m;
 413         }
 414         else
 415         {
 416                 range.port_min = n;
 417                 range.port_max = n;
 418         }
 419
 420         range.set = true;
 421         put_value(ptr, &range, sizeof(range), is_list);
 422         return true;
 423 }
 424
 425 bool
 426 fw3_parse_family(void *ptr, const char *val, bool is_list)
 427 {
 428         if (!strcmp(val, "any"))
 429                 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
 430         else if (!strcmp(val, "inet") || strrchr(val, '4'))
 431                 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
 432         else if (!strcmp(val, "inet6") || strrchr(val, '6'))
 433                 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
 434         else
 435                 return false;
 436
 437         return true;
 438 }
 439
 440 bool
 441 fw3_parse_icmptype(void *ptr, const char *val, bool is_list)
 442 {
 443         struct fw3_icmptype icmp = { };
 444         bool v4 = false;
 445         bool v6 = false;
 446         char *p;
 447         int i;
 448
 449         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
 450         {
 451                 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
 452                 {
 453                         icmp.type     = fw3_icmptype_list_v4[i].type;
 454                         icmp.code_min = fw3_icmptype_list_v4[i].code_min;
 455                         icmp.code_max = fw3_icmptype_list_v4[i].code_max;
 456
 457                         v4 = true;
 458                         break;
 459                 }
 460         }
 461
 462         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
 463         {
 464                 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
 465                 {
 466                         icmp.type6     = fw3_icmptype_list_v6[i].type;
 467                         icmp.code6_min = fw3_icmptype_list_v6[i].code_min;
 468                         icmp.code6_max = fw3_icmptype_list_v6[i].code_max;
 469
 470                         v6 = true;
 471                         break;
 472                 }
 473         }
 474
 475         if (!v4 && !v6)
 476         {
 477                 i = strtoul(val, &p, 10);
 478
 479                 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
 480                         return false;
 481
 482                 icmp.type = i;
 483
 484                 if (*p == '/')
 485                 {
 486                         val = ++p;
 487                         i = strtoul(val, &p, 10);
 488
 489                         if ((p == val) || (*p != 0) || (i > 0xFF))
 490                                 return false;
 491
 492                         icmp.code_min = i;
 493                         icmp.code_max = i;
 494                 }
 495                 else
 496                 {
 497                         icmp.code_min = 0;
 498                         icmp.code_max = 0xFF;
 499                 }
 500
 501                 icmp.type6     = icmp.type;
 502                 icmp.code6_min = icmp.code_max;
 503                 icmp.code6_max = icmp.code_max;
 504
 505                 v4 = true;
 506                 v6 = true;
 507         }
 508
 509         icmp.family = (v4 && v6) ? FW3_FAMILY_ANY
 510                                  : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
 511
 512         put_value(ptr, &icmp, sizeof(icmp), is_list);
 513         return true;
 514 }
 515
 516 bool
 517 fw3_parse_protocol(void *ptr, const char *val, bool is_list)
 518 {
 519         struct fw3_protocol proto = { };
 520         struct protoent *ent;
 521
 522         if (*val == '!')
 523         {
 524                 proto.invert = true;
 525                 while (isspace(*++val));
 526         }
 527
 528         if (!strcmp(val, "all"))
 529         {
 530                 proto.any = true;
 531                 put_value(ptr, &proto, sizeof(proto), is_list);
 532                 return true;
 533         }
 534         else if (!strcmp(val, "icmpv6"))
 535         {
 536                 val = "ipv6-icmp";
 537         }
 538         else if (!strcmp(val, "tcpudp"))
 539         {
 540                 proto.protocol = 6;
 541                 if (put_value(ptr, &proto, sizeof(proto), is_list))
 542                 {
 543                         proto.protocol = 17;
 544                         put_value(ptr, &proto, sizeof(proto), is_list);
 545                 }
 546
 547                 return true;
 548         }
 549
 550         ent = getprotobyname(val);
 551
 552         if (ent)
 553         {
 554                 proto.protocol = ent->p_proto;
 555                 put_value(ptr, &proto, sizeof(proto), is_list);
 556                 return true;
 557         }
 558
 559         proto.protocol = strtoul(val, NULL, 10);
 560
 561         if (errno == ERANGE || errno == EINVAL)
 562                 return false;
 563
 564         put_value(ptr, &proto, sizeof(proto), is_list);
 565         return true;
 566 }
 567
 568 bool
 569 fw3_parse_ipset_method(void *ptr, const char *val, bool is_list)
 570 {
 571         return parse_enum(ptr, val, &fw3_ipset_method_names[FW3_IPSET_METHOD_BITMAP],
 572                           FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
 573 }
 574
 575 bool
 576 fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list)
 577 {
 578         struct fw3_ipset_datatype type = { };
 579
 580         if (!strncmp(val, "dest_", 5))
 581         {
 582                 val += 5;
 583                 type.dest = true;
 584         }
 585         else if (!strncmp(val, "dst_", 4))
 586         {
 587                 val += 4;
 588                 type.dest = true;
 589         }
 590         else if (!strncmp(val, "src_", 4))
 591         {
 592                 val += 4;
 593                 type.dest = false;
 594         }
 595
 596         if (parse_enum(&type.type, val, &fw3_ipset_type_names[FW3_IPSET_TYPE_IP],
 597                        FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET))
 598         {
 599                 put_value(ptr, &type, sizeof(type), is_list);
 600                 return true;
 601         }
 602
 603         return false;
 604 }
 605
 606 bool
 607 fw3_parse_date(void *ptr, const char *val, bool is_list)
 608 {
 609         unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
 610         struct tm tm = { 0 };
 611         char *p;
 612
 613         year = strtoul(val, &p, 10);
 614         if ((*p != '-' && *p) || year < 1970 || year > 2038)
 615                 goto fail;
 616         else if (!*p)
 617                 goto ret;
 618
 619         mon = strtoul(++p, &p, 10);
 620         if ((*p != '-' && *p) || mon > 12)
 621                 goto fail;
 622         else if (!*p)
 623                 goto ret;
 624
 625         day = strtoul(++p, &p, 10);
 626         if ((*p != 'T' && *p) || day > 31)
 627                 goto fail;
 628         else if (!*p)
 629                 goto ret;
 630
 631         hour = strtoul(++p, &p, 10);
 632         if ((*p != ':' && *p) || hour > 23)
 633                 goto fail;
 634         else if (!*p)
 635                 goto ret;
 636
 637         min = strtoul(++p, &p, 10);
 638         if ((*p != ':' && *p) || min > 59)
 639                 goto fail;
 640         else if (!*p)
 641                 goto ret;
 642
 643         sec = strtoul(++p, &p, 10);
 644         if (*p || sec > 59)
 645                 goto fail;
 646
 647 ret:
 648         tm.tm_year = year - 1900;
 649         tm.tm_mon  = mon - 1;
 650         tm.tm_mday = day;
 651         tm.tm_hour = hour;
 652         tm.tm_min  = min;
 653         tm.tm_sec  = sec;
 654
 655         if (mktime(&tm) >= 0)
 656         {
 657                 *((struct tm *)ptr) = tm;
 658                 return true;
 659         }
 660
 661 fail:
 662         return false;
 663 }
 664
 665 bool
 666 fw3_parse_time(void *ptr, const char *val, bool is_list)
 667 {
 668         unsigned int hour = 0, min = 0, sec = 0;
 669         char *p;
 670
 671         hour = strtoul(val, &p, 10);
 672         if (*p != ':' || hour > 23)
 673                 goto fail;
 674
 675         min = strtoul(++p, &p, 10);
 676         if ((*p != ':' && *p) || min > 59)
 677                 goto fail;
 678         else if (!*p)
 679                 goto ret;
 680
 681         sec = strtoul(++p, &p, 10);
 682         if (*p || sec > 59)
 683                 goto fail;
 684
 685 ret:
 686         *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
 687         return true;
 688
 689 fail:
 690         return false;
 691 }
 692
 693 bool
 694 fw3_parse_weekdays(void *ptr, const char *val, bool is_list)
 695 {
 696         unsigned int w = 0;
 697         char *p, *s;
 698
 699         if (*val == '!')
 700         {
 701                 setbit(*(uint8_t *)ptr, 0);
 702                 while (isspace(*++val));
 703         }
 704
 705         if (!(s = strdup(val)))
 706                 return false;
 707
 708         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 709         {
 710                 if (!parse_enum(&w, p, weekdays, 1, 7))
 711                 {
 712                         w = strtoul(p, &p, 10);
 713
 714                         if (*p || w < 1 || w > 7)
 715                         {
 716                                 free(s);
 717                                 return false;
 718                         }
 719                 }
 720
 721                 setbit(*(uint8_t *)ptr, w);
 722         }
 723
 724         free(s);
 725         return true;
 726 }
 727
 728 bool
 729 fw3_parse_monthdays(void *ptr, const char *val, bool is_list)
 730 {
 731         unsigned int d;
 732         char *p, *s;
 733
 734         if (*val == '!')
 735         {
 736                 setbit(*(uint32_t *)ptr, 0);
 737                 while (isspace(*++val));
 738         }
 739
 740         if (!(s = strdup(val)))
 741                 return false;
 742
 743         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 744         {
 745                 d = strtoul(p, &p, 10);
 746
 747                 if (*p || d < 1 || d > 31)
 748                 {
 749                         free(s);
 750                         return false;
 751                 }
 752
 753                 setbit(*(uint32_t *)ptr, d);
 754         }
 755
 756         free(s);
 757         return true;
 758 }
 759
 760 bool
 761 fw3_parse_include_type(void *ptr, const char *val, bool is_list)
 762 {
 763         return parse_enum(ptr, val, include_types,
 764                           FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
 765 }
 766
 767 bool
 768 fw3_parse_reflection_source(void *ptr, const char *val, bool is_list)
 769 {
 770         return parse_enum(ptr, val, reflection_sources,
 771                           FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
 772 }
 773
 774 bool
 775 fw3_parse_mark(void *ptr, const char *val, bool is_list)
 776 {
 777         uint32_t n;
 778         char *s, *e;
 779         struct fw3_mark *m = ptr;
 780
 781         if (*val == '!')
 782         {
 783                 m->invert = true;
 784                 while (isspace(*++val));
 785         }
 786
 787         if ((s = strchr(val, '/')) != NULL)
 788                 *s++ = 0;
 789
 790         n = strtoul(val, &e, 0);
 791
 792         if (e == val || *e)
 793                 return false;
 794
 795         m->mark = n;
 796         m->mask = 0xFFFFFFFF;
 797
 798         if (s)
 799         {
 800                 n = strtoul(s, &e, 0);
 801
 802                 if (e == s || *e)
 803                         return false;
 804
 805                 m->mask = n;
 806         }
 807
 808         m->set = true;
 809         return true;
 810 }
 811
 812
 813 void
 814 fw3_parse_options(void *s, const struct fw3_option *opts,
 815                   struct uci_section *section)
 816 {
 817         char *p, *v;
 818         bool known;
 819         struct uci_element *e, *l;
 820         struct uci_option *o;
 821         const struct fw3_option *opt;
 822         struct list_head *dest;
 823
 824         uci_foreach_element(&section->options, e)
 825         {
 826                 o = uci_to_option(e);
 827                 known = false;
 828
 829                 for (opt = opts; opt->name; opt++)
 830                 {
 831                         if (!opt->parse)
 832                                 continue;
 833
 834                         if (strcmp(opt->name, e->name))
 835                                 continue;
 836
 837                         if (o->type == UCI_TYPE_LIST)
 838                         {
 839                                 if (!opt->elem_size)
 840                                 {
 841                                         warn_elem(e, "must not be a list");
 842                                 }
 843                                 else
 844                                 {
 845                                         dest = (struct list_head *)((char *)s + opt->offset);
 846
 847                                         uci_foreach_element(&o->v.list, l)
 848                                         {
 849                                                 if (!l->name)
 850                                                         continue;
 851
 852                                                 if (!opt->parse(dest, l->name, true))
 853                                                 {
 854                                                         warn_elem(e, "has invalid value '%s'", l->name);
 855                                                         continue;
 856                                                 }
 857                                         }
 858                                 }
 859                         }
 860                         else
 861                         {
 862                                 v = o->v.string;
 863
 864                                 if (!v)
 865                                         continue;
 866
 867                                 if (!opt->elem_size)
 868                                 {
 869                                         if (!opt->parse((char *)s + opt->offset, o->v.string, false))
 870                                                 warn_elem(e, "has invalid value '%s'", o->v.string);
 871                                 }
 872                                 else
 873                                 {
 874                                         dest = (struct list_head *)((char *)s + opt->offset);
 875
 876                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
 877                                         {
 878                                                 if (!opt->parse(dest, p, true))
 879                                                 {
 880                                                         warn_elem(e, "has invalid value '%s'", p);
 881                                                         continue;
 882                                                 }
 883                                         }
 884                                 }
 885                         }
 886
 887                         known = true;
 888                         break;
 889                 }
 890
 891                 if (!known)
 892                         warn_elem(e, "is unknown");
 893         }
 894 }
 895
 896
 897 const char *
 898 fw3_address_to_string(struct fw3_address *address, bool allow_invert)
 899 {
 900         char *p, ip[INET6_ADDRSTRLEN];
 901         static char buf[INET6_ADDRSTRLEN * 2 + 2];
 902
 903         p = buf;
 904
 905         if (address->invert && allow_invert)
 906                 p += sprintf(p, "!");
 907
 908         inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 909                   &address->address.v4, ip, sizeof(ip));
 910
 911         p += sprintf(p, "%s", ip);
 912
 913         if (address->range)
 914         {
 915                 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 916                           &address->address2.v4, ip, sizeof(ip));
 917
 918                 p += sprintf(p, "-%s", ip);
 919         }
 920         else
 921         {
 922                 p += sprintf(p, "/%u", address->mask);
 923         }
 924
 925         return buf;
 926 }