options.c

   1 /*
   2  * firewall3 - 3rd OpenWrt UCI firewall implementation
   3  *
   4  *   Copyright (C) 2013-2014 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         "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, *s, *e;
 248         int i, m = -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 ((p = strchr(s, '/')) != NULL)
 262         {
 263                 *p++ = 0;
 264                 m = strtoul(p, &e, 10);
 265
 266                 if ((e == p) || (*e != 0))
 267                 {
 268                         if (strchr(s, ':') || !inet_pton(AF_INET, p, &v4))
 269                         {
 270                                 free(s);
 271                                 return false;
 272                         }
 273
 274                         for (i = 0, m = 32; !(v4.s_addr & 1) && (i < 32); i++)
 275                         {
 276                                 m--;
 277                                 v4.s_addr >>= 1;
 278                         }
 279                 }
 280         }
 281         else if ((p = strchr(s, '-')) != NULL)
 282         {
 283                 *p++ = 0;
 284
 285                 if (inet_pton(AF_INET6, p, &v6))
 286                 {
 287                         addr.family = FW3_FAMILY_V6;
 288                         addr.address2.v6 = v6;
 289                         addr.range = true;
 290                 }
 291                 else if (inet_pton(AF_INET, p, &v4))
 292                 {
 293                         addr.family = FW3_FAMILY_V4;
 294                         addr.address2.v4 = v4;
 295                         addr.range = true;
 296                 }
 297                 else
 298                 {
 299                         free(s);
 300                         return false;
 301                 }
 302         }
 303
 304         if (inet_pton(AF_INET6, s, &v6))
 305         {
 306                 addr.family = FW3_FAMILY_V6;
 307                 addr.address.v6 = v6;
 308                 addr.mask = (m >= 0) ? m : 128;
 309         }
 310         else if (inet_pton(AF_INET, s, &v4))
 311         {
 312                 addr.family = FW3_FAMILY_V4;
 313                 addr.address.v4 = v4;
 314                 addr.mask = (m >= 0) ? m : 32;
 315         }
 316         else
 317         {
 318                 free(s);
 319                 return false;
 320         }
 321
 322         free(s);
 323         addr.set = true;
 324         put_value(ptr, &addr, sizeof(addr), is_list);
 325         return true;
 326 }
 327
 328 bool
 329 fw3_parse_network(void *ptr, const char *val, bool is_list)
 330 {
 331         struct fw3_device dev = { };
 332         struct fw3_address *addr;
 333         LIST_HEAD(addr_list);
 334
 335         if (!fw3_parse_address(ptr, val, is_list))
 336         {
 337                 if (!fw3_parse_device(&dev, val, false))
 338                         return false;
 339
 340                 fw3_ubus_address(&addr_list, dev.name);
 341                 list_for_each_entry(addr, &addr_list, list)
 342                 {
 343                         addr->invert = dev.invert;
 344                         addr->resolved = true;
 345                 }
 346                 list_splice_tail(&addr_list, ptr);
 347         }
 348
 349         return true;
 350 }
 351
 352 bool
 353 fw3_parse_mac(void *ptr, const char *val, bool is_list)
 354 {
 355         struct fw3_mac addr = { };
 356         struct ether_addr *mac;
 357
 358         if (*val == '!')
 359         {
 360                 addr.invert = true;
 361                 while (isspace(*++val));
 362         }
 363
 364         if ((mac = ether_aton(val)) != NULL)
 365         {
 366                 addr.mac = *mac;
 367                 addr.set = true;
 368
 369                 put_value(ptr, &addr, sizeof(addr), is_list);
 370                 return true;
 371         }
 372
 373         return false;
 374 }
 375
 376 bool
 377 fw3_parse_port(void *ptr, const char *val, bool is_list)
 378 {
 379         struct fw3_port range = { };
 380         uint16_t n;
 381         uint16_t m;
 382         char *p;
 383
 384         if (*val == '!')
 385         {
 386                 range.invert = true;
 387                 while (isspace(*++val));
 388         }
 389
 390         n = strtoul(val, &p, 10);
 391
 392         if (errno == ERANGE || errno == EINVAL)
 393                 return false;
 394
 395         if (*p && *p != '-' && *p != ':')
 396                 return false;
 397
 398         if (*p)
 399         {
 400                 m = strtoul(++p, NULL, 10);
 401
 402                 if (errno == ERANGE || errno == EINVAL || m < n)
 403                         return false;
 404
 405                 range.port_min = n;
 406                 range.port_max = m;
 407         }
 408         else
 409         {
 410                 range.port_min = n;
 411                 range.port_max = n;
 412         }
 413
 414         range.set = true;
 415         put_value(ptr, &range, sizeof(range), is_list);
 416         return true;
 417 }
 418
 419 bool
 420 fw3_parse_family(void *ptr, const char *val, bool is_list)
 421 {
 422         if (!strcmp(val, "any"))
 423                 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
 424         else if (!strcmp(val, "inet") || strrchr(val, '4'))
 425                 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
 426         else if (!strcmp(val, "inet6") || strrchr(val, '6'))
 427                 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
 428         else
 429                 return false;
 430
 431         return true;
 432 }
 433
 434 bool
 435 fw3_parse_icmptype(void *ptr, const char *val, bool is_list)
 436 {
 437         struct fw3_icmptype icmp = { };
 438         bool v4 = false;
 439         bool v6 = false;
 440         char *p;
 441         int i;
 442
 443         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
 444         {
 445                 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
 446                 {
 447                         icmp.type     = fw3_icmptype_list_v4[i].type;
 448                         icmp.code_min = fw3_icmptype_list_v4[i].code_min;
 449                         icmp.code_max = fw3_icmptype_list_v4[i].code_max;
 450
 451                         v4 = true;
 452                         break;
 453                 }
 454         }
 455
 456         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
 457         {
 458                 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
 459                 {
 460                         icmp.type6     = fw3_icmptype_list_v6[i].type;
 461                         icmp.code6_min = fw3_icmptype_list_v6[i].code_min;
 462                         icmp.code6_max = fw3_icmptype_list_v6[i].code_max;
 463
 464                         v6 = true;
 465                         break;
 466                 }
 467         }
 468
 469         if (!v4 && !v6)
 470         {
 471                 i = strtoul(val, &p, 10);
 472
 473                 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
 474                         return false;
 475
 476                 icmp.type = i;
 477
 478                 if (*p == '/')
 479                 {
 480                         val = ++p;
 481                         i = strtoul(val, &p, 10);
 482
 483                         if ((p == val) || (*p != 0) || (i > 0xFF))
 484                                 return false;
 485
 486                         icmp.code_min = i;
 487                         icmp.code_max = i;
 488                 }
 489                 else
 490                 {
 491                         icmp.code_min = 0;
 492                         icmp.code_max = 0xFF;
 493                 }
 494
 495                 icmp.type6     = icmp.type;
 496                 icmp.code6_min = icmp.code_max;
 497                 icmp.code6_max = icmp.code_max;
 498
 499                 v4 = true;
 500                 v6 = true;
 501         }
 502
 503         icmp.family = (v4 && v6) ? FW3_FAMILY_ANY
 504                                  : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
 505
 506         put_value(ptr, &icmp, sizeof(icmp), is_list);
 507         return true;
 508 }
 509
 510 bool
 511 fw3_parse_protocol(void *ptr, const char *val, bool is_list)
 512 {
 513         struct fw3_protocol proto = { };
 514         struct protoent *ent;
 515         char *e;
 516
 517         if (*val == '!')
 518         {
 519                 proto.invert = true;
 520                 while (isspace(*++val));
 521         }
 522
 523         if (!strcmp(val, "all"))
 524         {
 525                 proto.any = true;
 526                 put_value(ptr, &proto, sizeof(proto), is_list);
 527                 return true;
 528         }
 529         else if (!strcmp(val, "icmpv6"))
 530         {
 531                 val = "ipv6-icmp";
 532         }
 533         else if (!strcmp(val, "tcpudp"))
 534         {
 535                 proto.protocol = 6;
 536                 if (put_value(ptr, &proto, sizeof(proto), is_list))
 537                 {
 538                         proto.protocol = 17;
 539                         put_value(ptr, &proto, sizeof(proto), is_list);
 540                 }
 541
 542                 return true;
 543         }
 544
 545         ent = getprotobyname(val);
 546
 547         if (ent)
 548         {
 549                 proto.protocol = ent->p_proto;
 550                 put_value(ptr, &proto, sizeof(proto), is_list);
 551                 return true;
 552         }
 553
 554         proto.protocol = strtoul(val, &e, 10);
 555
 556         if ((e == val) || (*e != 0))
 557                 return false;
 558
 559         put_value(ptr, &proto, sizeof(proto), is_list);
 560         return true;
 561 }
 562
 563 bool
 564 fw3_parse_ipset_method(void *ptr, const char *val, bool is_list)
 565 {
 566         return parse_enum(ptr, val, &fw3_ipset_method_names[FW3_IPSET_METHOD_BITMAP],
 567                           FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
 568 }
 569
 570 bool
 571 fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list)
 572 {
 573         struct fw3_ipset_datatype type = { };
 574
 575         type.dir = "src";
 576
 577         if (!strncmp(val, "dest_", 5))
 578         {
 579                 val += 5;
 580                 type.dir = "dst";
 581         }
 582         else if (!strncmp(val, "dst_", 4))
 583         {
 584                 val += 4;
 585                 type.dir = "dst";
 586         }
 587         else if (!strncmp(val, "src_", 4))
 588         {
 589                 val += 4;
 590                 type.dir = "src";
 591         }
 592
 593         if (parse_enum(&type.type, val, &fw3_ipset_type_names[FW3_IPSET_TYPE_IP],
 594                        FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET))
 595         {
 596                 put_value(ptr, &type, sizeof(type), is_list);
 597                 return true;
 598         }
 599
 600         return false;
 601 }
 602
 603 bool
 604 fw3_parse_date(void *ptr, const char *val, bool is_list)
 605 {
 606         unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
 607         struct tm tm = { 0 };
 608         char *p;
 609
 610         year = strtoul(val, &p, 10);
 611         if ((*p != '-' && *p) || year < 1970 || year > 2038)
 612                 goto fail;
 613         else if (!*p)
 614                 goto ret;
 615
 616         mon = strtoul(++p, &p, 10);
 617         if ((*p != '-' && *p) || mon > 12)
 618                 goto fail;
 619         else if (!*p)
 620                 goto ret;
 621
 622         day = strtoul(++p, &p, 10);
 623         if ((*p != 'T' && *p) || day > 31)
 624                 goto fail;
 625         else if (!*p)
 626                 goto ret;
 627
 628         hour = strtoul(++p, &p, 10);
 629         if ((*p != ':' && *p) || hour > 23)
 630                 goto fail;
 631         else if (!*p)
 632                 goto ret;
 633
 634         min = strtoul(++p, &p, 10);
 635         if ((*p != ':' && *p) || min > 59)
 636                 goto fail;
 637         else if (!*p)
 638                 goto ret;
 639
 640         sec = strtoul(++p, &p, 10);
 641         if (*p || sec > 59)
 642                 goto fail;
 643
 644 ret:
 645         tm.tm_year = year - 1900;
 646         tm.tm_mon  = mon - 1;
 647         tm.tm_mday = day;
 648         tm.tm_hour = hour;
 649         tm.tm_min  = min;
 650         tm.tm_sec  = sec;
 651
 652         if (mktime(&tm) >= 0)
 653         {
 654                 *((struct tm *)ptr) = tm;
 655                 return true;
 656         }
 657
 658 fail:
 659         return false;
 660 }
 661
 662 bool
 663 fw3_parse_time(void *ptr, const char *val, bool is_list)
 664 {
 665         unsigned int hour = 0, min = 0, sec = 0;
 666         char *p;
 667
 668         hour = strtoul(val, &p, 10);
 669         if (*p != ':' || hour > 23)
 670                 goto fail;
 671
 672         min = strtoul(++p, &p, 10);
 673         if ((*p != ':' && *p) || min > 59)
 674                 goto fail;
 675         else if (!*p)
 676                 goto ret;
 677
 678         sec = strtoul(++p, &p, 10);
 679         if (*p || sec > 59)
 680                 goto fail;
 681
 682 ret:
 683         *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
 684         return true;
 685
 686 fail:
 687         return false;
 688 }
 689
 690 bool
 691 fw3_parse_weekdays(void *ptr, const char *val, bool is_list)
 692 {
 693         unsigned int w = 0;
 694         char *p, *s;
 695
 696         if (*val == '!')
 697         {
 698                 setbit(*(uint8_t *)ptr, 0);
 699                 while (isspace(*++val));
 700         }
 701
 702         if (!(s = strdup(val)))
 703                 return false;
 704
 705         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 706         {
 707                 if (!parse_enum(&w, p, weekdays, 1, 7))
 708                 {
 709                         w = strtoul(p, &p, 10);
 710
 711                         if (*p || w < 1 || w > 7)
 712                         {
 713                                 free(s);
 714                                 return false;
 715                         }
 716                 }
 717
 718                 setbit(*(uint8_t *)ptr, w);
 719         }
 720
 721         free(s);
 722         return true;
 723 }
 724
 725 bool
 726 fw3_parse_monthdays(void *ptr, const char *val, bool is_list)
 727 {
 728         unsigned int d;
 729         char *p, *s;
 730
 731         if (*val == '!')
 732         {
 733                 setbit(*(uint32_t *)ptr, 0);
 734                 while (isspace(*++val));
 735         }
 736
 737         if (!(s = strdup(val)))
 738                 return false;
 739
 740         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 741         {
 742                 d = strtoul(p, &p, 10);
 743
 744                 if (*p || d < 1 || d > 31)
 745                 {
 746                         free(s);
 747                         return false;
 748                 }
 749
 750                 setbit(*(uint32_t *)ptr, d);
 751         }
 752
 753         free(s);
 754         return true;
 755 }
 756
 757 bool
 758 fw3_parse_include_type(void *ptr, const char *val, bool is_list)
 759 {
 760         return parse_enum(ptr, val, include_types,
 761                           FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
 762 }
 763
 764 bool
 765 fw3_parse_reflection_source(void *ptr, const char *val, bool is_list)
 766 {
 767         return parse_enum(ptr, val, reflection_sources,
 768                           FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
 769 }
 770
 771 bool
 772 fw3_parse_mark(void *ptr, const char *val, bool is_list)
 773 {
 774         uint32_t n;
 775         char *s, *e;
 776         struct fw3_mark *m = ptr;
 777
 778         if (*val == '!')
 779         {
 780                 m->invert = true;
 781                 while (isspace(*++val));
 782         }
 783
 784         if ((s = strchr(val, '/')) != NULL)
 785                 *s++ = 0;
 786
 787         n = strtoul(val, &e, 0);
 788
 789         if (e == val || *e)
 790                 return false;
 791
 792         m->mark = n;
 793         m->mask = 0xFFFFFFFF;
 794
 795         if (s)
 796         {
 797                 n = strtoul(s, &e, 0);
 798
 799                 if (e == s || *e)
 800                         return false;
 801
 802                 m->mask = n;
 803         }
 804
 805         m->set = true;
 806         return true;
 807 }
 808
 809 bool
 810 fw3_parse_setmatch(void *ptr, const char *val, bool is_list)
 811 {
 812         struct fw3_setmatch *m = ptr;
 813         char *p, *s;
 814         int i;
 815
 816         if (*val == '!')
 817         {
 818                 m->invert = true;
 819                 while (isspace(*++val));
 820         }
 821
 822         if (!(s = strdup(val)))
 823                 return false;
 824
 825         if (!(p = strtok(s, " \t")))
 826         {
 827                 free(s);
 828                 return false;
 829         }
 830
 831         strncpy(m->name, p, sizeof(m->name));
 832
 833         for (i = 0, p = strtok(NULL, " \t,");
 834              i < 3 && p != NULL;
 835              i++, p = strtok(NULL, " \t,"))
 836         {
 837                 if (!strncmp(p, "dest", 4) || !strncmp(p, "dst", 3))
 838                         m->dir[i] = "dst";
 839                 else if (!strncmp(p, "src", 3))
 840                         m->dir[i] = "src";
 841         }
 842
 843         free(s);
 844
 845         m->set = true;
 846         return true;
 847 }
 848
 849 bool
 850 fw3_parse_direction(void *ptr, const char *val, bool is_list)
 851 {
 852         bool *is_out = ptr;
 853         bool valid = true;
 854
 855         if (!strcmp(val, "in") || !strcmp(val, "ingress"))
 856                 *is_out = false;
 857         else if (!strcmp(val, "out") || !strcmp(val, "egress"))
 858                 *is_out = true;
 859         else
 860                 valid = false;
 861
 862         return valid;
 863 }
 864
 865
 866 bool
 867 fw3_parse_options(void *s, const struct fw3_option *opts,
 868                   struct uci_section *section)
 869 {
 870         char *p, *v;
 871         bool known;
 872         struct uci_element *e, *l;
 873         struct uci_option *o;
 874         const struct fw3_option *opt;
 875         struct list_head *dest;
 876         bool valid = true;
 877
 878         uci_foreach_element(&section->options, e)
 879         {
 880                 o = uci_to_option(e);
 881                 known = false;
 882
 883                 for (opt = opts; opt->name; opt++)
 884                 {
 885                         if (!opt->parse)
 886                                 continue;
 887
 888                         if (strcmp(opt->name, e->name))
 889                                 continue;
 890
 891                         if (o->type == UCI_TYPE_LIST)
 892                         {
 893                                 if (!opt->elem_size)
 894                                 {
 895                                         warn_elem(e, "must not be a list");
 896                                         valid = false;
 897                                 }
 898                                 else
 899                                 {
 900                                         dest = (struct list_head *)((char *)s + opt->offset);
 901
 902                                         uci_foreach_element(&o->v.list, l)
 903                                         {
 904                                                 if (!l->name)
 905                                                         continue;
 906
 907                                                 if (!opt->parse(dest, l->name, true))
 908                                                 {
 909                                                         warn_elem(e, "has invalid value '%s'", l->name);
 910                                                         valid = false;
 911                                                         continue;
 912                                                 }
 913                                         }
 914                                 }
 915                         }
 916                         else
 917                         {
 918                                 v = o->v.string;
 919
 920                                 if (!v)
 921                                         continue;
 922
 923                                 if (!opt->elem_size)
 924                                 {
 925                                         if (!opt->parse((char *)s + opt->offset, o->v.string, false))
 926                                         {
 927                                                 warn_elem(e, "has invalid value '%s'", o->v.string);
 928                                                 valid = false;
 929                                         }
 930                                 }
 931                                 else
 932                                 {
 933                                         dest = (struct list_head *)((char *)s + opt->offset);
 934
 935                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
 936                                         {
 937                                                 if (!opt->parse(dest, p, true))
 938                                                 {
 939                                                         warn_elem(e, "has invalid value '%s'", p);
 940                                                         valid = false;
 941                                                         continue;
 942                                                 }
 943                                         }
 944                                 }
 945                         }
 946
 947                         known = true;
 948                         break;
 949                 }
 950
 951                 if (!known)
 952                         warn_elem(e, "is unknown");
 953         }
 954
 955         return valid;
 956 }
 957
 958
 959 bool
 960 fw3_parse_blob_options(void *s, const struct fw3_option *opts,
 961                   struct blob_attr *a)
 962 {
 963         char *p, *v, buf[16];
 964         bool known;
 965         unsigned rem, erem;
 966         struct blob_attr *o, *e;
 967         const struct fw3_option *opt;
 968         struct list_head *dest;
 969         bool valid = true;
 970
 971         blobmsg_for_each_attr(o, a, rem)
 972         {
 973                 known = false;
 974
 975                 for (opt = opts; opt->name; opt++)
 976                 {
 977                         if (!opt->parse)
 978                                 continue;
 979
 980                         if (strcmp(opt->name, blobmsg_name(o)))
 981                                 continue;
 982
 983                         if (blobmsg_type(o) == BLOBMSG_TYPE_ARRAY)
 984                         {
 985                                 if (!opt->elem_size)
 986                                 {
 987                                         fprintf(stderr, "%s must not be a list\n", opt->name);
 988                                         valid = false;
 989                                 }
 990                                 else
 991                                 {
 992                                         dest = (struct list_head *)((char *)s + opt->offset);
 993
 994                                         blobmsg_for_each_attr(e, o, erem)
 995                                         {
 996                                                 if (blobmsg_type(e) == BLOBMSG_TYPE_INT32) {
 997                                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(e));
 998                                                         v = buf;
 999                                                 } else {
1000                                                         v = blobmsg_get_string(e);
1001                                                 }
1002
1003                                                 if (!opt->parse(dest, v, true))
1004                                                 {
1005                                                         fprintf(stderr, "%s has invalid value '%s'\n", opt->name, v);
1006                                                         valid = false;
1007                                                         continue;
1008                                                 }
1009                                         }
1010                                 }
1011                         }
1012                         else
1013                         {
1014                                 if (blobmsg_type(o) == BLOBMSG_TYPE_INT32) {
1015                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(o));
1016                                         v = buf;
1017                                 } else {
1018                                         v = blobmsg_get_string(o);
1019                                 }
1020
1021                                 if (!v)
1022                                         continue;
1023
1024                                 if (!opt->elem_size)
1025                                 {
1026                                         if (!opt->parse((char *)s + opt->offset, v, false))
1027                                         {
1028                                                 fprintf(stderr, "%s has invalid value '%s'\n", opt->name, v);
1029                                                 valid = false;
1030                                         }
1031                                 }
1032                                 else
1033                                 {
1034                                         dest = (struct list_head *)((char *)s + opt->offset);
1035
1036                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
1037                                         {
1038                                                 if (!opt->parse(dest, p, true))
1039                                                 {
1040                                                         fprintf(stderr, "%s has invalid value '%s'\n", opt->name, p);
1041                                                         valid = false;
1042                                                         continue;
1043                                                 }
1044                                         }
1045                                 }
1046                         }
1047
1048                         known = true;
1049                         break;
1050                 }
1051
1052                 if (!known)
1053                         fprintf(stderr, "%s is unknown\n", blobmsg_name(o));
1054         }
1055
1056         return valid;
1057 }
1058
1059
1060 const char *
1061 fw3_address_to_string(struct fw3_address *address, bool allow_invert)
1062 {
1063         char *p, ip[INET6_ADDRSTRLEN];
1064         static char buf[INET6_ADDRSTRLEN * 2 + 2];
1065
1066         p = buf;
1067
1068         if (address->invert && allow_invert)
1069                 p += sprintf(p, "!");
1070
1071         inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1072                   &address->address.v4, ip, sizeof(ip));
1073
1074         p += sprintf(p, "%s", ip);
1075
1076         if (address->range)
1077         {
1078                 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1079                           &address->address2.v4, ip, sizeof(ip));
1080
1081                 p += sprintf(p, "-%s", ip);
1082         }
1083         else
1084         {
1085                 p += sprintf(p, "/%u", address->mask);
1086         }
1087
1088         return buf;
1089 }