options.c

   1 /*
   2  * firewall3 - 3rd OpenWrt UCI firewall implementation
   3  *
   4  *   Copyright (C) 2013-2014 Jo-Philipp Wich <jo@mein.io>
   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         "MASQUERADE",
  82
  83         "ACCEPT",
  84         "REJECT",
  85         "DROP",
  86 };
  87
  88 const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX] = {
  89         "second",
  90         "minute",
  91         "hour",
  92         "day",
  93 };
  94
  95 const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX] = {
  96         "(bug)",
  97         "bitmap",
  98         "hash",
  99         "list",
 100 };
 101
 102 const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX] = {
 103         "(bug)",
 104         "ip",
 105         "port",
 106         "mac",
 107         "net",
 108         "set",
 109 };
 110
 111 static const char *weekdays[] = {
 112         "monday",
 113         "tuesday",
 114         "wednesday",
 115         "thursday",
 116         "friday",
 117         "saturday",
 118         "sunday",
 119 };
 120
 121 static const char *include_types[] = {
 122         "script",
 123         "restore",
 124 };
 125
 126 static const char *reflection_sources[] = {
 127         "internal",
 128         "external",
 129 };
 130
 131
 132 bool
 133 fw3_parse_bool(void *ptr, const char *val, bool is_list)
 134 {
 135         if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
 136                 *((bool *)ptr) = true;
 137         else
 138                 *((bool *)ptr) = false;
 139
 140         return true;
 141 }
 142
 143 bool
 144 fw3_parse_int(void *ptr, const char *val, bool is_list)
 145 {
 146         char *e;
 147         int n = strtol(val, &e, 0);
 148
 149         if (e == val || *e)
 150                 return false;
 151
 152         *((int *)ptr) = n;
 153
 154         return true;
 155 }
 156
 157 bool
 158 fw3_parse_string(void *ptr, const char *val, bool is_list)
 159 {
 160         *((char **)ptr) = (char *)val;
 161         return true;
 162 }
 163
 164 bool
 165 fw3_parse_target(void *ptr, const char *val, bool is_list)
 166 {
 167         return parse_enum(ptr, val, &fw3_flag_names[FW3_FLAG_ACCEPT],
 168                           FW3_FLAG_ACCEPT, FW3_FLAG_MASQUERADE);
 169 }
 170
 171 bool
 172 fw3_parse_limit(void *ptr, const char *val, bool is_list)
 173 {
 174         struct fw3_limit *limit = ptr;
 175         enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
 176         char *e;
 177         int n;
 178
 179         if (*val == '!')
 180         {
 181                 limit->invert = true;
 182                 while (isspace(*++val));
 183         }
 184
 185         n = strtol(val, &e, 10);
 186
 187         if (errno == ERANGE || errno == EINVAL)
 188                 return false;
 189
 190         if (*e && *e++ != '/')
 191                 return false;
 192
 193         if (!strlen(e))
 194                 return false;
 195
 196         if (!parse_enum(&u, e, fw3_limit_units, 0, FW3_LIMIT_UNIT_DAY))
 197                 return false;
 198
 199         limit->rate = n;
 200         limit->unit = u;
 201
 202         return true;
 203 }
 204
 205 bool
 206 fw3_parse_device(void *ptr, const char *val, bool is_list)
 207 {
 208         char *p;
 209         struct fw3_device dev = { };
 210
 211         if (*val == '*')
 212         {
 213                 dev.set = true;
 214                 dev.any = true;
 215                 put_value(ptr, &dev, sizeof(dev), is_list);
 216                 return true;
 217         }
 218
 219         if (*val == '!')
 220         {
 221                 dev.invert = true;
 222                 while (isspace(*++val));
 223         }
 224
 225         if ((p = strchr(val, '@')) != NULL)
 226         {
 227                 *p++ = 0;
 228                 snprintf(dev.network, sizeof(dev.network), "%s", p);
 229         }
 230
 231         if (*val)
 232                 snprintf(dev.name, sizeof(dev.name), "%s", val);
 233         else
 234                 return false;
 235
 236         dev.set = true;
 237         put_value(ptr, &dev, sizeof(dev), is_list);
 238         return true;
 239 }
 240
 241 bool
 242 fw3_parse_address(void *ptr, const char *val, bool is_list)
 243 {
 244         struct fw3_address addr = { };
 245         struct in_addr v4;
 246         struct in6_addr v6;
 247         char *p = NULL, *m = NULL, *s, *e;
 248         int bits = -1;
 249
 250         if (*val == '!')
 251         {
 252                 addr.invert = true;
 253                 while (isspace(*++val));
 254         }
 255
 256         s = strdup(val);
 257
 258         if (!s)
 259                 return false;
 260
 261         if ((m = strchr(s, '/')) != NULL)
 262                 *m++ = 0;
 263         else if ((p = strchr(s, '-')) != NULL)
 264                 *p++ = 0;
 265
 266         if (inet_pton(AF_INET6, s, &v6))
 267         {
 268                 addr.family = FW3_FAMILY_V6;
 269                 addr.address.v6 = v6;
 270
 271                 if (m)
 272                 {
 273                         if (!inet_pton(AF_INET6, m, &v6))
 274                         {
 275                                 bits = strtol(m, &e, 10);
 276
 277                                 if ((*e != 0) || !fw3_bitlen2netmask(addr.family, bits, &v6))
 278                                         goto fail;
 279                         }
 280
 281                         addr.mask.v6 = v6;
 282                 }
 283                 else if (p)
 284                 {
 285                         if (!inet_pton(AF_INET6, p, &addr.mask.v6))
 286                                 goto fail;
 287
 288                         addr.range = true;
 289                 }
 290                 else
 291                 {
 292                         memset(addr.mask.v6.s6_addr, 0xFF, 16);
 293                 }
 294         }
 295         else if (inet_pton(AF_INET, s, &v4))
 296         {
 297                 addr.family = FW3_FAMILY_V4;
 298                 addr.address.v4 = v4;
 299
 300                 if (m)
 301                 {
 302                         if (!inet_pton(AF_INET, m, &v4))
 303                         {
 304                                 bits = strtol(m, &e, 10);
 305
 306                                 if ((*e != 0) || !fw3_bitlen2netmask(addr.family, bits, &v4))
 307                                         goto fail;
 308                         }
 309
 310                         addr.mask.v4 = v4;
 311                 }
 312                 else if (p)
 313                 {
 314                         if (!inet_pton(AF_INET, p, &addr.mask.v4))
 315                                 goto fail;
 316
 317                         addr.range = true;
 318                 }
 319                 else
 320                 {
 321                         addr.mask.v4.s_addr = 0xFFFFFFFF;
 322                 }
 323         }
 324         else
 325         {
 326                 goto fail;
 327         }
 328
 329         free(s);
 330         addr.set = true;
 331         put_value(ptr, &addr, sizeof(addr), is_list);
 332         return true;
 333
 334 fail:
 335         free(s);
 336         return false;
 337 }
 338
 339 bool
 340 fw3_parse_network(void *ptr, const char *val, bool is_list)
 341 {
 342         struct fw3_device dev = { };
 343         struct fw3_address *addr, *tmp;
 344         LIST_HEAD(addr_list);
 345
 346         if (!fw3_parse_address(ptr, val, is_list))
 347         {
 348                 if (!fw3_parse_device(&dev, val, false))
 349                         return false;
 350
 351                 fw3_ubus_address(&addr_list, dev.name);
 352                 list_for_each_entry(addr, &addr_list, list)
 353                 {
 354                         addr->invert = dev.invert;
 355                         addr->resolved = true;
 356                 }
 357
 358                 if (is_list)
 359                 {
 360                         list_splice_tail(&addr_list, ptr);
 361                 }
 362                 else if (!list_empty(&addr_list))
 363                 {
 364                         memcpy(ptr, list_first_entry(&addr_list, typeof(*addr), list),
 365                                sizeof(*addr));
 366
 367                         list_for_each_entry_safe(addr, tmp, &addr_list, list)
 368                                 free(addr);
 369                 }
 370         }
 371
 372         return true;
 373 }
 374
 375 bool
 376 fw3_parse_mac(void *ptr, const char *val, bool is_list)
 377 {
 378         struct fw3_mac addr = { };
 379         struct ether_addr *mac;
 380
 381         if (*val == '!')
 382         {
 383                 addr.invert = true;
 384                 while (isspace(*++val));
 385         }
 386
 387         if ((mac = ether_aton(val)) != NULL)
 388         {
 389                 addr.mac = *mac;
 390                 addr.set = true;
 391
 392                 put_value(ptr, &addr, sizeof(addr), is_list);
 393                 return true;
 394         }
 395
 396         return false;
 397 }
 398
 399 bool
 400 fw3_parse_port(void *ptr, const char *val, bool is_list)
 401 {
 402         struct fw3_port range = { };
 403         uint16_t n;
 404         uint16_t m;
 405         char *p;
 406
 407         if (*val == '!')
 408         {
 409                 range.invert = true;
 410                 while (isspace(*++val));
 411         }
 412
 413         n = strtoul(val, &p, 10);
 414
 415         if (errno == ERANGE || errno == EINVAL)
 416                 return false;
 417
 418         if (*p && *p != '-' && *p != ':')
 419                 return false;
 420
 421         if (*p)
 422         {
 423                 m = strtoul(++p, NULL, 10);
 424
 425                 if (errno == ERANGE || errno == EINVAL || m < n)
 426                         return false;
 427
 428                 range.port_min = n;
 429                 range.port_max = m;
 430         }
 431         else
 432         {
 433                 range.port_min = n;
 434                 range.port_max = n;
 435         }
 436
 437         range.set = true;
 438         put_value(ptr, &range, sizeof(range), is_list);
 439         return true;
 440 }
 441
 442 bool
 443 fw3_parse_family(void *ptr, const char *val, bool is_list)
 444 {
 445         if (!strcmp(val, "any") || !strcmp(val, "*"))
 446                 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
 447         else if (!strcmp(val, "inet") || strrchr(val, '4'))
 448                 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
 449         else if (!strcmp(val, "inet6") || strrchr(val, '6'))
 450                 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
 451         else
 452                 return false;
 453
 454         return true;
 455 }
 456
 457 bool
 458 fw3_parse_icmptype(void *ptr, const char *val, bool is_list)
 459 {
 460         struct fw3_icmptype icmp = { };
 461         bool v4 = false;
 462         bool v6 = false;
 463         char *p;
 464         int i;
 465
 466         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
 467         {
 468                 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
 469                 {
 470                         icmp.type     = fw3_icmptype_list_v4[i].type;
 471                         icmp.code_min = fw3_icmptype_list_v4[i].code_min;
 472                         icmp.code_max = fw3_icmptype_list_v4[i].code_max;
 473
 474                         v4 = true;
 475                         break;
 476                 }
 477         }
 478
 479         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
 480         {
 481                 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
 482                 {
 483                         icmp.type6     = fw3_icmptype_list_v6[i].type;
 484                         icmp.code6_min = fw3_icmptype_list_v6[i].code_min;
 485                         icmp.code6_max = fw3_icmptype_list_v6[i].code_max;
 486
 487                         v6 = true;
 488                         break;
 489                 }
 490         }
 491
 492         if (!v4 && !v6)
 493         {
 494                 i = strtoul(val, &p, 10);
 495
 496                 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
 497                         return false;
 498
 499                 icmp.type = i;
 500
 501                 if (*p == '/')
 502                 {
 503                         val = ++p;
 504                         i = strtoul(val, &p, 10);
 505
 506                         if ((p == val) || (*p != 0) || (i > 0xFF))
 507                                 return false;
 508
 509                         icmp.code_min = i;
 510                         icmp.code_max = i;
 511                 }
 512                 else
 513                 {
 514                         icmp.code_min = 0;
 515                         icmp.code_max = 0xFF;
 516                 }
 517
 518                 icmp.type6     = icmp.type;
 519                 icmp.code6_min = icmp.code_max;
 520                 icmp.code6_max = icmp.code_max;
 521
 522                 v4 = true;
 523                 v6 = true;
 524         }
 525
 526         icmp.family = (v4 && v6) ? FW3_FAMILY_ANY
 527                                  : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
 528
 529         put_value(ptr, &icmp, sizeof(icmp), is_list);
 530         return true;
 531 }
 532
 533 bool
 534 fw3_parse_protocol(void *ptr, const char *val, bool is_list)
 535 {
 536         struct fw3_protocol proto = { };
 537         struct protoent *ent;
 538         char *e;
 539
 540         if (*val == '!')
 541         {
 542                 proto.invert = true;
 543                 while (isspace(*++val));
 544         }
 545
 546         if (!strcmp(val, "all") || !strcmp(val, "any") || !strcmp(val, "*"))
 547         {
 548                 proto.any = true;
 549                 put_value(ptr, &proto, sizeof(proto), is_list);
 550                 return true;
 551         }
 552         else if (!strcmp(val, "icmpv6"))
 553         {
 554                 val = "ipv6-icmp";
 555         }
 556         else if (!strcmp(val, "tcpudp"))
 557         {
 558                 proto.protocol = 6;
 559                 if (put_value(ptr, &proto, sizeof(proto), is_list))
 560                 {
 561                         proto.protocol = 17;
 562                         put_value(ptr, &proto, sizeof(proto), is_list);
 563                 }
 564
 565                 return true;
 566         }
 567
 568         ent = getprotobyname(val);
 569
 570         if (ent)
 571         {
 572                 proto.protocol = ent->p_proto;
 573                 put_value(ptr, &proto, sizeof(proto), is_list);
 574                 return true;
 575         }
 576
 577         proto.protocol = strtoul(val, &e, 10);
 578
 579         if ((e == val) || (*e != 0))
 580                 return false;
 581
 582         put_value(ptr, &proto, sizeof(proto), is_list);
 583         return true;
 584 }
 585
 586 bool
 587 fw3_parse_ipset_method(void *ptr, const char *val, bool is_list)
 588 {
 589         return parse_enum(ptr, val, &fw3_ipset_method_names[FW3_IPSET_METHOD_BITMAP],
 590                           FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
 591 }
 592
 593 bool
 594 fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list)
 595 {
 596         struct fw3_ipset_datatype type = { };
 597
 598         type.dir = "src";
 599
 600         if (!strncmp(val, "dest_", 5))
 601         {
 602                 val += 5;
 603                 type.dir = "dst";
 604         }
 605         else if (!strncmp(val, "dst_", 4))
 606         {
 607                 val += 4;
 608                 type.dir = "dst";
 609         }
 610         else if (!strncmp(val, "src_", 4))
 611         {
 612                 val += 4;
 613                 type.dir = "src";
 614         }
 615
 616         if (parse_enum(&type.type, val, &fw3_ipset_type_names[FW3_IPSET_TYPE_IP],
 617                        FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET))
 618         {
 619                 put_value(ptr, &type, sizeof(type), is_list);
 620                 return true;
 621         }
 622
 623         return false;
 624 }
 625
 626 bool
 627 fw3_parse_date(void *ptr, const char *val, bool is_list)
 628 {
 629         unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
 630         struct tm tm = { 0 };
 631         char *p;
 632
 633         year = strtoul(val, &p, 10);
 634         if ((*p != '-' && *p) || year < 1970 || year > 2038)
 635                 goto fail;
 636         else if (!*p)
 637                 goto ret;
 638
 639         mon = strtoul(++p, &p, 10);
 640         if ((*p != '-' && *p) || mon > 12)
 641                 goto fail;
 642         else if (!*p)
 643                 goto ret;
 644
 645         day = strtoul(++p, &p, 10);
 646         if ((*p != 'T' && *p) || day > 31)
 647                 goto fail;
 648         else if (!*p)
 649                 goto ret;
 650
 651         hour = strtoul(++p, &p, 10);
 652         if ((*p != ':' && *p) || hour > 23)
 653                 goto fail;
 654         else if (!*p)
 655                 goto ret;
 656
 657         min = strtoul(++p, &p, 10);
 658         if ((*p != ':' && *p) || min > 59)
 659                 goto fail;
 660         else if (!*p)
 661                 goto ret;
 662
 663         sec = strtoul(++p, &p, 10);
 664         if (*p || sec > 59)
 665                 goto fail;
 666
 667 ret:
 668         tm.tm_year = year - 1900;
 669         tm.tm_mon  = mon - 1;
 670         tm.tm_mday = day;
 671         tm.tm_hour = hour;
 672         tm.tm_min  = min;
 673         tm.tm_sec  = sec;
 674
 675         if (mktime(&tm) >= 0)
 676         {
 677                 *((struct tm *)ptr) = tm;
 678                 return true;
 679         }
 680
 681 fail:
 682         return false;
 683 }
 684
 685 bool
 686 fw3_parse_time(void *ptr, const char *val, bool is_list)
 687 {
 688         unsigned int hour = 0, min = 0, sec = 0;
 689         char *p;
 690
 691         hour = strtoul(val, &p, 10);
 692         if (*p != ':' || hour > 23)
 693                 goto fail;
 694
 695         min = strtoul(++p, &p, 10);
 696         if ((*p != ':' && *p) || min > 59)
 697                 goto fail;
 698         else if (!*p)
 699                 goto ret;
 700
 701         sec = strtoul(++p, &p, 10);
 702         if (*p || sec > 59)
 703                 goto fail;
 704
 705 ret:
 706         *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
 707         return true;
 708
 709 fail:
 710         return false;
 711 }
 712
 713 bool
 714 fw3_parse_weekdays(void *ptr, const char *val, bool is_list)
 715 {
 716         unsigned int w = 0;
 717         char *p, *s;
 718
 719         if (*val == '!')
 720         {
 721                 setbit(*(uint8_t *)ptr, 0);
 722                 while (isspace(*++val));
 723         }
 724
 725         if (!(s = strdup(val)))
 726                 return false;
 727
 728         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 729         {
 730                 if (!parse_enum(&w, p, weekdays, 1, 7))
 731                 {
 732                         w = strtoul(p, &p, 10);
 733
 734                         if (*p || w < 1 || w > 7)
 735                         {
 736                                 free(s);
 737                                 return false;
 738                         }
 739                 }
 740
 741                 setbit(*(uint8_t *)ptr, w);
 742         }
 743
 744         free(s);
 745         return true;
 746 }
 747
 748 bool
 749 fw3_parse_monthdays(void *ptr, const char *val, bool is_list)
 750 {
 751         unsigned int d;
 752         char *p, *s;
 753
 754         if (*val == '!')
 755         {
 756                 setbit(*(uint32_t *)ptr, 0);
 757                 while (isspace(*++val));
 758         }
 759
 760         if (!(s = strdup(val)))
 761                 return false;
 762
 763         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 764         {
 765                 d = strtoul(p, &p, 10);
 766
 767                 if (*p || d < 1 || d > 31)
 768                 {
 769                         free(s);
 770                         return false;
 771                 }
 772
 773                 setbit(*(uint32_t *)ptr, d);
 774         }
 775
 776         free(s);
 777         return true;
 778 }
 779
 780 bool
 781 fw3_parse_include_type(void *ptr, const char *val, bool is_list)
 782 {
 783         return parse_enum(ptr, val, include_types,
 784                           FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
 785 }
 786
 787 bool
 788 fw3_parse_reflection_source(void *ptr, const char *val, bool is_list)
 789 {
 790         return parse_enum(ptr, val, reflection_sources,
 791                           FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
 792 }
 793
 794 bool
 795 fw3_parse_mark(void *ptr, const char *val, bool is_list)
 796 {
 797         uint32_t n;
 798         char *s, *e;
 799         struct fw3_mark *m = ptr;
 800
 801         if (*val == '!')
 802         {
 803                 m->invert = true;
 804                 while (isspace(*++val));
 805         }
 806
 807         if ((s = strchr(val, '/')) != NULL)
 808                 *s++ = 0;
 809
 810         n = strtoul(val, &e, 0);
 811
 812         if (e == val || *e)
 813                 return false;
 814
 815         m->mark = n;
 816         m->mask = 0xFFFFFFFF;
 817
 818         if (s)
 819         {
 820                 n = strtoul(s, &e, 0);
 821
 822                 if (e == s || *e)
 823                         return false;
 824
 825                 m->mask = n;
 826         }
 827
 828         m->set = true;
 829         return true;
 830 }
 831
 832 bool
 833 fw3_parse_setmatch(void *ptr, const char *val, bool is_list)
 834 {
 835         struct fw3_setmatch *m = ptr;
 836         char *p, *s;
 837         int i;
 838
 839         if (*val == '!')
 840         {
 841                 m->invert = true;
 842                 while (isspace(*++val));
 843         }
 844
 845         if (!(s = strdup(val)))
 846                 return false;
 847
 848         if (!(p = strtok(s, " \t")))
 849         {
 850                 free(s);
 851                 return false;
 852         }
 853
 854         strncpy(m->name, p, sizeof(m->name));
 855
 856         for (i = 0, p = strtok(NULL, " \t,");
 857              i < 3 && p != NULL;
 858              i++, p = strtok(NULL, " \t,"))
 859         {
 860                 if (!strncmp(p, "dest", 4) || !strncmp(p, "dst", 3))
 861                         m->dir[i] = "dst";
 862                 else if (!strncmp(p, "src", 3))
 863                         m->dir[i] = "src";
 864         }
 865
 866         free(s);
 867
 868         m->set = true;
 869         return true;
 870 }
 871
 872 bool
 873 fw3_parse_direction(void *ptr, const char *val, bool is_list)
 874 {
 875         bool *is_out = ptr;
 876         bool valid = true;
 877
 878         if (!strcmp(val, "in") || !strcmp(val, "ingress"))
 879                 *is_out = false;
 880         else if (!strcmp(val, "out") || !strcmp(val, "egress"))
 881                 *is_out = true;
 882         else
 883                 valid = false;
 884
 885         return valid;
 886 }
 887
 888
 889 bool
 890 fw3_parse_options(void *s, const struct fw3_option *opts,
 891                   struct uci_section *section)
 892 {
 893         char *p, *v;
 894         bool known;
 895         struct uci_element *e, *l;
 896         struct uci_option *o;
 897         const struct fw3_option *opt;
 898         struct list_head *dest;
 899         bool valid = true;
 900
 901         uci_foreach_element(&section->options, e)
 902         {
 903                 o = uci_to_option(e);
 904                 known = false;
 905
 906                 for (opt = opts; opt->name; opt++)
 907                 {
 908                         if (!opt->parse)
 909                                 continue;
 910
 911                         if (strcmp(opt->name, e->name))
 912                                 continue;
 913
 914                         if (o->type == UCI_TYPE_LIST)
 915                         {
 916                                 if (!opt->elem_size)
 917                                 {
 918                                         warn_elem(e, "must not be a list");
 919                                         valid = false;
 920                                 }
 921                                 else
 922                                 {
 923                                         dest = (struct list_head *)((char *)s + opt->offset);
 924
 925                                         uci_foreach_element(&o->v.list, l)
 926                                         {
 927                                                 if (!l->name)
 928                                                         continue;
 929
 930                                                 if (!opt->parse(dest, l->name, true))
 931                                                 {
 932                                                         warn_elem(e, "has invalid value '%s'", l->name);
 933                                                         valid = false;
 934                                                         continue;
 935                                                 }
 936                                         }
 937                                 }
 938                         }
 939                         else
 940                         {
 941                                 v = o->v.string;
 942
 943                                 if (!v)
 944                                         continue;
 945
 946                                 if (!opt->elem_size)
 947                                 {
 948                                         if (!opt->parse((char *)s + opt->offset, o->v.string, false))
 949                                         {
 950                                                 warn_elem(e, "has invalid value '%s'", o->v.string);
 951                                                 valid = false;
 952                                         }
 953                                 }
 954                                 else
 955                                 {
 956                                         dest = (struct list_head *)((char *)s + opt->offset);
 957
 958                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
 959                                         {
 960                                                 if (!opt->parse(dest, p, true))
 961                                                 {
 962                                                         warn_elem(e, "has invalid value '%s'", p);
 963                                                         valid = false;
 964                                                         continue;
 965                                                 }
 966                                         }
 967                                 }
 968                         }
 969
 970                         known = true;
 971                         break;
 972                 }
 973
 974                 if (!known)
 975                         warn_elem(e, "is unknown");
 976         }
 977
 978         return valid;
 979 }
 980
 981
 982 bool
 983 fw3_parse_blob_options(void *s, const struct fw3_option *opts,
 984                        struct blob_attr *a, const char *name)
 985 {
 986         char *p, *v, buf[16];
 987         bool known;
 988         unsigned rem, erem;
 989         struct blob_attr *o, *e;
 990         const struct fw3_option *opt;
 991         struct list_head *dest;
 992         bool valid = true;
 993
 994         blobmsg_for_each_attr(o, a, rem)
 995         {
 996                 known = false;
 997
 998                 for (opt = opts; opt->name; opt++)
 999                 {
1000                         if (!opt->parse)
1001                                 continue;
1002
1003                         if (strcmp(opt->name, blobmsg_name(o)))
1004                                 continue;
1005
1006                         if (blobmsg_type(o) == BLOBMSG_TYPE_ARRAY)
1007                         {
1008                                 if (!opt->elem_size)
1009                                 {
1010                                         fprintf(stderr, "%s: '%s' must not be a list\n",
1011                                                 name, opt->name);
1012
1013                                         valid = false;
1014                                 }
1015                                 else
1016                                 {
1017                                         dest = (struct list_head *)((char *)s + opt->offset);
1018
1019                                         blobmsg_for_each_attr(e, o, erem)
1020                                         {
1021                                                 if (blobmsg_type(e) == BLOBMSG_TYPE_INT32) {
1022                                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(e));
1023                                                         v = buf;
1024                                                 } else {
1025                                                         v = blobmsg_get_string(e);
1026                                                 }
1027
1028                                                 if (!opt->parse(dest, v, true))
1029                                                 {
1030                                                         fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1031                                                                 name, opt->name, v);
1032                                                         valid = false;
1033                                                         continue;
1034                                                 }
1035                                         }
1036                                 }
1037                         }
1038                         else
1039                         {
1040                                 if (blobmsg_type(o) == BLOBMSG_TYPE_INT32) {
1041                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(o));
1042                                         v = buf;
1043                                 } else {
1044                                         v = blobmsg_get_string(o);
1045                                 }
1046
1047                                 if (!v)
1048                                         continue;
1049
1050                                 if (!opt->elem_size)
1051                                 {
1052                                         if (!opt->parse((char *)s + opt->offset, v, false))
1053                                         {
1054                                                 fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1055                                                         name, opt->name, v);
1056                                                 valid = false;
1057                                         }
1058                                 }
1059                                 else
1060                                 {
1061                                         dest = (struct list_head *)((char *)s + opt->offset);
1062
1063                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
1064                                         {
1065                                                 if (!opt->parse(dest, p, true))
1066                                                 {
1067                                                         fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1068                                                                 name, opt->name, p);
1069                                                         valid = false;
1070                                                         continue;
1071                                                 }
1072                                         }
1073                                 }
1074                         }
1075
1076                         known = true;
1077                         break;
1078                 }
1079
1080                 if (!known && strcmp(blobmsg_name(o), "type"))
1081                         fprintf(stderr, "%s: '%s' is unknown\n", name, blobmsg_name(o));
1082         }
1083
1084         return valid;
1085 }
1086
1087
1088 const char *
1089 fw3_address_to_string(struct fw3_address *address, bool allow_invert, bool as_cidr)
1090 {
1091         char *p, ip[INET6_ADDRSTRLEN];
1092         static char buf[INET6_ADDRSTRLEN * 2 + 2];
1093
1094         p = buf;
1095
1096         if (address->invert && allow_invert)
1097                 p += sprintf(p, "!");
1098
1099         inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1100                   &address->address.v4, ip, sizeof(ip));
1101
1102         p += sprintf(p, "%s", ip);
1103
1104         if (address->range)
1105         {
1106                 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1107                           &address->mask.v4, ip, sizeof(ip));
1108
1109                 p += sprintf(p, "-%s", ip);
1110         }
1111         else if (!as_cidr)
1112         {
1113                 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1114                           &address->mask.v4, ip, sizeof(ip));
1115
1116                 p += sprintf(p, "/%s", ip);
1117         }
1118         else
1119         {
1120                 p += sprintf(p, "/%u", fw3_netmask2bitlen(address->family,
1121                                                           &address->mask.v6));
1122         }
1123
1124         return buf;
1125 }