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         "HELPER",
  79         "MARK",
  80         "DSCP",
  81         "DNAT",
  82         "SNAT",
  83         "MASQUERADE",
  84
  85         "ACCEPT",
  86         "REJECT",
  87         "DROP",
  88 };
  89
  90 const char *fw3_reject_code_names[__FW3_REJECT_CODE_MAX] = {
  91         "tcp-reset",
  92         "port-unreach",
  93         "adm-prohibited",
  94 };
  95
  96 const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX] = {
  97         "second",
  98         "minute",
  99         "hour",
 100         "day",
 101 };
 102
 103 const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX] = {
 104         "(bug)",
 105         "bitmap",
 106         "hash",
 107         "list",
 108 };
 109
 110 const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX] = {
 111         "(bug)",
 112         "ip",
 113         "port",
 114         "mac",
 115         "net",
 116         "set",
 117 };
 118
 119 static const char *weekdays[] = {
 120         "monday",
 121         "tuesday",
 122         "wednesday",
 123         "thursday",
 124         "friday",
 125         "saturday",
 126         "sunday",
 127 };
 128
 129 static const char *include_types[] = {
 130         "script",
 131         "restore",
 132 };
 133
 134 static const char *reflection_sources[] = {
 135         "internal",
 136         "external",
 137 };
 138
 139 static const struct { const char *name; uint8_t dscp; } dscp_classes[] = {
 140         { "CS0",  0x00 },
 141         { "CS1",  0x08 },
 142         { "CS2",  0x10 },
 143         { "CS3",  0x18 },
 144         { "CS4",  0x20 },
 145         { "CS5",  0x28 },
 146         { "CS6",  0x30 },
 147         { "CS7",  0x38 },
 148         { "BE",   0x00 },
 149         { "AF11", 0x0a },
 150         { "AF12", 0x0c },
 151         { "AF13", 0x0e },
 152         { "AF21", 0x12 },
 153         { "AF22", 0x14 },
 154         { "AF23", 0x16 },
 155         { "AF31", 0x1a },
 156         { "AF32", 0x1c },
 157         { "AF33", 0x1e },
 158         { "AF41", 0x22 },
 159         { "AF42", 0x24 },
 160         { "AF43", 0x26 },
 161         { "EF",   0x2e }
 162 };
 163
 164
 165 bool
 166 fw3_parse_bool(void *ptr, const char *val, bool is_list)
 167 {
 168         if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
 169                 *((bool *)ptr) = true;
 170         else
 171                 *((bool *)ptr) = false;
 172
 173         return true;
 174 }
 175
 176 bool
 177 fw3_parse_int(void *ptr, const char *val, bool is_list)
 178 {
 179         char *e;
 180         int n = strtol(val, &e, 0);
 181
 182         if (e == val || *e)
 183                 return false;
 184
 185         *((int *)ptr) = n;
 186
 187         return true;
 188 }
 189
 190 bool
 191 fw3_parse_string(void *ptr, const char *val, bool is_list)
 192 {
 193         *((char **)ptr) = (char *)val;
 194         return true;
 195 }
 196
 197 bool
 198 fw3_parse_target(void *ptr, const char *val, bool is_list)
 199 {
 200         return parse_enum(ptr, val, &fw3_flag_names[FW3_FLAG_ACCEPT],
 201                           FW3_FLAG_ACCEPT, FW3_FLAG_MASQUERADE);
 202 }
 203
 204 bool
 205 fw3_parse_reject_code(void *ptr, const char *val, bool is_list)
 206 {
 207         return parse_enum(ptr, val, &fw3_reject_code_names[FW3_REJECT_CODE_TCP_RESET],
 208                           FW3_REJECT_CODE_TCP_RESET, FW3_REJECT_CODE_ADM_PROHIBITED);
 209 }
 210
 211 bool
 212 fw3_parse_limit(void *ptr, const char *val, bool is_list)
 213 {
 214         struct fw3_limit *limit = ptr;
 215         enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
 216         char *e;
 217         int n;
 218
 219         if (*val == '!')
 220         {
 221                 limit->invert = true;
 222                 while (isspace(*++val));
 223         }
 224
 225         n = strtol(val, &e, 10);
 226
 227         if (errno == ERANGE || errno == EINVAL)
 228                 return false;
 229
 230         if (*e && *e++ != '/')
 231                 return false;
 232
 233         if (!strlen(e))
 234                 return false;
 235
 236         if (!parse_enum(&u, e, fw3_limit_units, 0, FW3_LIMIT_UNIT_DAY))
 237                 return false;
 238
 239         limit->rate = n;
 240         limit->unit = u;
 241
 242         return true;
 243 }
 244
 245 bool
 246 fw3_parse_device(void *ptr, const char *val, bool is_list)
 247 {
 248         char *p;
 249         struct fw3_device dev = { };
 250
 251         if (*val == '*')
 252         {
 253                 dev.set = true;
 254                 dev.any = true;
 255                 put_value(ptr, &dev, sizeof(dev), is_list);
 256                 return true;
 257         }
 258
 259         if (*val == '!')
 260         {
 261                 dev.invert = true;
 262                 while (isspace(*++val));
 263         }
 264
 265         if ((p = strchr(val, '@')) != NULL)
 266         {
 267                 *p++ = 0;
 268                 snprintf(dev.network, sizeof(dev.network), "%s", p);
 269         }
 270
 271         if (*val)
 272                 snprintf(dev.name, sizeof(dev.name), "%s", val);
 273         else
 274                 return false;
 275
 276         dev.set = true;
 277         put_value(ptr, &dev, sizeof(dev), is_list);
 278         return true;
 279 }
 280
 281 bool
 282 fw3_parse_address(void *ptr, const char *val, bool is_list)
 283 {
 284         struct fw3_address addr = { };
 285         struct in_addr v4;
 286         struct in6_addr v6;
 287         char *p = NULL, *m = NULL, *s, *e;
 288         int bits = -1;
 289
 290         if (*val == '!')
 291         {
 292                 addr.invert = true;
 293                 while (isspace(*++val));
 294         }
 295
 296         s = strdup(val);
 297
 298         if (!s)
 299                 return false;
 300
 301         if ((m = strchr(s, '/')) != NULL)
 302                 *m++ = 0;
 303         else if ((p = strchr(s, '-')) != NULL)
 304                 *p++ = 0;
 305
 306         if (inet_pton(AF_INET6, s, &v6))
 307         {
 308                 addr.family = FW3_FAMILY_V6;
 309                 addr.address.v6 = v6;
 310
 311                 if (m)
 312                 {
 313                         if (!inet_pton(AF_INET6, m, &v6))
 314                         {
 315                                 bits = strtol(m, &e, 10);
 316
 317                                 if ((*e != 0) || !fw3_bitlen2netmask(addr.family, bits, &v6))
 318                                         goto fail;
 319                         }
 320
 321                         addr.mask.v6 = v6;
 322                 }
 323                 else if (p)
 324                 {
 325                         if (!inet_pton(AF_INET6, p, &addr.mask.v6))
 326                                 goto fail;
 327
 328                         addr.range = true;
 329                 }
 330                 else
 331                 {
 332                         memset(addr.mask.v6.s6_addr, 0xFF, 16);
 333                 }
 334         }
 335         else if (inet_pton(AF_INET, s, &v4))
 336         {
 337                 addr.family = FW3_FAMILY_V4;
 338                 addr.address.v4 = v4;
 339
 340                 if (m)
 341                 {
 342                         if (!inet_pton(AF_INET, m, &v4))
 343                         {
 344                                 bits = strtol(m, &e, 10);
 345
 346                                 if ((*e != 0) || !fw3_bitlen2netmask(addr.family, bits, &v4))
 347                                         goto fail;
 348                         }
 349
 350                         addr.mask.v4 = v4;
 351                 }
 352                 else if (p)
 353                 {
 354                         if (!inet_pton(AF_INET, p, &addr.mask.v4))
 355                                 goto fail;
 356
 357                         addr.range = true;
 358                 }
 359                 else
 360                 {
 361                         addr.mask.v4.s_addr = 0xFFFFFFFF;
 362                 }
 363         }
 364         else
 365         {
 366                 goto fail;
 367         }
 368
 369         free(s);
 370         addr.set = true;
 371         put_value(ptr, &addr, sizeof(addr), is_list);
 372         return true;
 373
 374 fail:
 375         free(s);
 376         return false;
 377 }
 378
 379 bool
 380 fw3_parse_network(void *ptr, const char *val, bool is_list)
 381 {
 382         struct fw3_device dev = { };
 383         struct fw3_address *addr, *tmp;
 384         LIST_HEAD(addr_list);
 385         int n_addrs;
 386
 387         if (!fw3_parse_address(ptr, val, is_list))
 388         {
 389                 if (!fw3_parse_device(&dev, val, false))
 390                         return false;
 391
 392                 n_addrs = fw3_ubus_address(&addr_list, dev.name);
 393
 394                 list_for_each_entry(addr, &addr_list, list)
 395                 {
 396                         addr->invert = dev.invert;
 397                         addr->resolved = true;
 398                 }
 399
 400                 /* add an empty address member with .set = false, .resolved = true
 401                  * to signal resolving failure to callers */
 402                 if (n_addrs == 0)
 403                 {
 404                         tmp = fw3_alloc(sizeof(*tmp));
 405                         tmp->resolved = true;
 406
 407                         list_add_tail(&tmp->list, &addr_list);
 408                 }
 409
 410                 if (is_list)
 411                 {
 412                         list_splice_tail(&addr_list, ptr);
 413                 }
 414                 else if (!list_empty(&addr_list))
 415                 {
 416                         memcpy(ptr, list_first_entry(&addr_list, typeof(*addr), list),
 417                                sizeof(*addr));
 418
 419                         list_for_each_entry_safe(addr, tmp, &addr_list, list)
 420                                 free(addr);
 421                 }
 422         }
 423
 424         return true;
 425 }
 426
 427 bool
 428 fw3_parse_mac(void *ptr, const char *val, bool is_list)
 429 {
 430         struct fw3_mac addr = { };
 431         struct ether_addr *mac;
 432
 433         if (*val == '!')
 434         {
 435                 addr.invert = true;
 436                 while (isspace(*++val));
 437         }
 438
 439         if ((mac = ether_aton(val)) != NULL)
 440         {
 441                 addr.mac = *mac;
 442                 addr.set = true;
 443
 444                 put_value(ptr, &addr, sizeof(addr), is_list);
 445                 return true;
 446         }
 447
 448         return false;
 449 }
 450
 451 bool
 452 fw3_parse_port(void *ptr, const char *val, bool is_list)
 453 {
 454         struct fw3_port range = { };
 455         uint16_t n;
 456         uint16_t m;
 457         char *p;
 458
 459         if (*val == '!')
 460         {
 461                 range.invert = true;
 462                 while (isspace(*++val));
 463         }
 464
 465         n = strtoul(val, &p, 10);
 466
 467         if (errno == ERANGE || errno == EINVAL)
 468                 return false;
 469
 470         if (*p && *p != '-' && *p != ':')
 471                 return false;
 472
 473         if (*p)
 474         {
 475                 m = strtoul(++p, NULL, 10);
 476
 477                 if (errno == ERANGE || errno == EINVAL || m < n)
 478                         return false;
 479
 480                 range.port_min = n;
 481                 range.port_max = m;
 482         }
 483         else
 484         {
 485                 range.port_min = n;
 486                 range.port_max = n;
 487         }
 488
 489         range.set = true;
 490         put_value(ptr, &range, sizeof(range), is_list);
 491         return true;
 492 }
 493
 494 bool
 495 fw3_parse_family(void *ptr, const char *val, bool is_list)
 496 {
 497         if (!strcmp(val, "any") || !strcmp(val, "*"))
 498                 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
 499         else if (!strcmp(val, "inet") || strrchr(val, '4'))
 500                 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
 501         else if (!strcmp(val, "inet6") || strrchr(val, '6'))
 502                 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
 503         else
 504                 return false;
 505
 506         return true;
 507 }
 508
 509 bool
 510 fw3_parse_icmptype(void *ptr, const char *val, bool is_list)
 511 {
 512         struct fw3_icmptype icmp = { };
 513         bool v4 = false;
 514         bool v6 = false;
 515         char *p;
 516         int i;
 517
 518         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
 519         {
 520                 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
 521                 {
 522                         icmp.type     = fw3_icmptype_list_v4[i].type;
 523                         icmp.code_min = fw3_icmptype_list_v4[i].code_min;
 524                         icmp.code_max = fw3_icmptype_list_v4[i].code_max;
 525
 526                         v4 = true;
 527                         break;
 528                 }
 529         }
 530
 531         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
 532         {
 533                 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
 534                 {
 535                         icmp.type6     = fw3_icmptype_list_v6[i].type;
 536                         icmp.code6_min = fw3_icmptype_list_v6[i].code_min;
 537                         icmp.code6_max = fw3_icmptype_list_v6[i].code_max;
 538
 539                         v6 = true;
 540                         break;
 541                 }
 542         }
 543
 544         if (!v4 && !v6)
 545         {
 546                 i = strtoul(val, &p, 10);
 547
 548                 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
 549                         return false;
 550
 551                 icmp.type = i;
 552
 553                 if (*p == '/')
 554                 {
 555                         val = ++p;
 556                         i = strtoul(val, &p, 10);
 557
 558                         if ((p == val) || (*p != 0) || (i > 0xFF))
 559                                 return false;
 560
 561                         icmp.code_min = i;
 562                         icmp.code_max = i;
 563                 }
 564                 else
 565                 {
 566                         icmp.code_min = 0;
 567                         icmp.code_max = 0xFF;
 568                 }
 569
 570                 icmp.type6     = icmp.type;
 571                 icmp.code6_min = icmp.code_min;
 572                 icmp.code6_max = icmp.code_max;
 573
 574                 v4 = true;
 575                 v6 = true;
 576         }
 577
 578         icmp.family = (v4 && v6) ? FW3_FAMILY_ANY
 579                                  : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
 580
 581         put_value(ptr, &icmp, sizeof(icmp), is_list);
 582         return true;
 583 }
 584
 585 bool
 586 fw3_parse_protocol(void *ptr, const char *val, bool is_list)
 587 {
 588         struct fw3_protocol proto = { };
 589         struct protoent *ent;
 590         char *e;
 591
 592         if (*val == '!')
 593         {
 594                 proto.invert = true;
 595                 while (isspace(*++val));
 596         }
 597
 598         if (!strcmp(val, "all") || !strcmp(val, "any") || !strcmp(val, "*"))
 599         {
 600                 proto.any = true;
 601                 put_value(ptr, &proto, sizeof(proto), is_list);
 602                 return true;
 603         }
 604         else if (!strcmp(val, "icmpv6"))
 605         {
 606                 val = "ipv6-icmp";
 607         }
 608         else if (!strcmp(val, "tcpudp"))
 609         {
 610                 proto.protocol = 6;
 611                 if (put_value(ptr, &proto, sizeof(proto), is_list))
 612                 {
 613                         proto.protocol = 17;
 614                         put_value(ptr, &proto, sizeof(proto), is_list);
 615                 }
 616
 617                 return true;
 618         }
 619
 620         ent = getprotobyname(val);
 621
 622         if (ent)
 623         {
 624                 proto.protocol = ent->p_proto;
 625                 put_value(ptr, &proto, sizeof(proto), is_list);
 626                 return true;
 627         }
 628
 629         proto.protocol = strtoul(val, &e, 10);
 630
 631         if ((e == val) || (*e != 0))
 632                 return false;
 633
 634         put_value(ptr, &proto, sizeof(proto), is_list);
 635         return true;
 636 }
 637
 638 bool
 639 fw3_parse_ipset_method(void *ptr, const char *val, bool is_list)
 640 {
 641         return parse_enum(ptr, val, &fw3_ipset_method_names[FW3_IPSET_METHOD_BITMAP],
 642                           FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
 643 }
 644
 645 bool
 646 fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list)
 647 {
 648         struct fw3_ipset_datatype type = { };
 649
 650         type.dir = "src";
 651
 652         if (!strncmp(val, "dest_", 5))
 653         {
 654                 val += 5;
 655                 type.dir = "dst";
 656         }
 657         else if (!strncmp(val, "dst_", 4))
 658         {
 659                 val += 4;
 660                 type.dir = "dst";
 661         }
 662         else if (!strncmp(val, "src_", 4))
 663         {
 664                 val += 4;
 665                 type.dir = "src";
 666         }
 667
 668         if (parse_enum(&type.type, val, &fw3_ipset_type_names[FW3_IPSET_TYPE_IP],
 669                        FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET))
 670         {
 671                 put_value(ptr, &type, sizeof(type), is_list);
 672                 return true;
 673         }
 674
 675         return false;
 676 }
 677
 678 bool
 679 fw3_parse_date(void *ptr, const char *val, bool is_list)
 680 {
 681         unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
 682         struct tm tm = { 0 };
 683         time_t ts;
 684         char *p;
 685
 686         year = strtoul(val, &p, 10);
 687         if ((*p != '-' && *p) || year < 1970 || year > 2038)
 688                 goto fail;
 689         else if (!*p)
 690                 goto ret;
 691
 692         mon = strtoul(++p, &p, 10);
 693         if ((*p != '-' && *p) || mon > 12)
 694                 goto fail;
 695         else if (!*p)
 696                 goto ret;
 697
 698         day = strtoul(++p, &p, 10);
 699         if ((*p != 'T' && *p) || day > 31)
 700                 goto fail;
 701         else if (!*p)
 702                 goto ret;
 703
 704         hour = strtoul(++p, &p, 10);
 705         if ((*p != ':' && *p) || hour > 23)
 706                 goto fail;
 707         else if (!*p)
 708                 goto ret;
 709
 710         min = strtoul(++p, &p, 10);
 711         if ((*p != ':' && *p) || min > 59)
 712                 goto fail;
 713         else if (!*p)
 714                 goto ret;
 715
 716         sec = strtoul(++p, &p, 10);
 717         if (*p || sec > 59)
 718                 goto fail;
 719
 720 ret:
 721         tm.tm_year = year - 1900;
 722         tm.tm_mon  = mon - 1;
 723         tm.tm_mday = day;
 724         tm.tm_hour = hour;
 725         tm.tm_min  = min;
 726         tm.tm_sec  = sec;
 727
 728         ts = mktime(&tm) - timezone;
 729
 730         if (ts >= 0)
 731         {
 732                 gmtime_r(&ts, (struct tm *)ptr);
 733                 return true;
 734         }
 735
 736 fail:
 737         return false;
 738 }
 739
 740 bool
 741 fw3_parse_time(void *ptr, const char *val, bool is_list)
 742 {
 743         unsigned int hour = 0, min = 0, sec = 0;
 744         char *p;
 745
 746         hour = strtoul(val, &p, 10);
 747         if (*p != ':' || hour > 23)
 748                 goto fail;
 749
 750         min = strtoul(++p, &p, 10);
 751         if ((*p != ':' && *p) || min > 59)
 752                 goto fail;
 753         else if (!*p)
 754                 goto ret;
 755
 756         sec = strtoul(++p, &p, 10);
 757         if (*p || sec > 59)
 758                 goto fail;
 759
 760 ret:
 761         *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
 762         return true;
 763
 764 fail:
 765         return false;
 766 }
 767
 768 bool
 769 fw3_parse_weekdays(void *ptr, const char *val, bool is_list)
 770 {
 771         unsigned int w = 0;
 772         char *p, *s;
 773
 774         if (*val == '!')
 775         {
 776                 fw3_setbit(*(uint8_t *)ptr, 0);
 777                 while (isspace(*++val));
 778         }
 779
 780         if (!(s = strdup(val)))
 781                 return false;
 782
 783         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 784         {
 785                 if (!parse_enum(&w, p, weekdays, 1, 7))
 786                 {
 787                         w = strtoul(p, &p, 10);
 788
 789                         if (*p || w < 1 || w > 7)
 790                         {
 791                                 free(s);
 792                                 return false;
 793                         }
 794                 }
 795
 796                 fw3_setbit(*(uint8_t *)ptr, w);
 797         }
 798
 799         free(s);
 800         return true;
 801 }
 802
 803 bool
 804 fw3_parse_monthdays(void *ptr, const char *val, bool is_list)
 805 {
 806         unsigned int d;
 807         char *p, *s;
 808
 809         if (*val == '!')
 810         {
 811                 fw3_setbit(*(uint32_t *)ptr, 0);
 812                 while (isspace(*++val));
 813         }
 814
 815         if (!(s = strdup(val)))
 816                 return false;
 817
 818         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 819         {
 820                 d = strtoul(p, &p, 10);
 821
 822                 if (*p || d < 1 || d > 31)
 823                 {
 824                         free(s);
 825                         return false;
 826                 }
 827
 828                 fw3_setbit(*(uint32_t *)ptr, d);
 829         }
 830
 831         free(s);
 832         return true;
 833 }
 834
 835 bool
 836 fw3_parse_include_type(void *ptr, const char *val, bool is_list)
 837 {
 838         return parse_enum(ptr, val, include_types,
 839                           FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
 840 }
 841
 842 bool
 843 fw3_parse_reflection_source(void *ptr, const char *val, bool is_list)
 844 {
 845         return parse_enum(ptr, val, reflection_sources,
 846                           FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
 847 }
 848
 849 bool
 850 fw3_parse_mark(void *ptr, const char *val, bool is_list)
 851 {
 852         uint32_t n;
 853         char *s, *e;
 854         struct fw3_mark *m = ptr;
 855
 856         if (*val == '!')
 857         {
 858                 m->invert = true;
 859                 while (isspace(*++val));
 860         }
 861
 862         if ((s = strchr(val, '/')) != NULL)
 863                 *s++ = 0;
 864
 865         n = strtoul(val, &e, 0);
 866
 867         if (e == val || *e)
 868                 return false;
 869
 870         m->mark = n;
 871         m->mask = 0xFFFFFFFF;
 872
 873         if (s)
 874         {
 875                 n = strtoul(s, &e, 0);
 876
 877                 if (e == s || *e)
 878                         return false;
 879
 880                 m->mask = n;
 881         }
 882
 883         m->set = true;
 884         return true;
 885 }
 886
 887 bool
 888 fw3_parse_dscp(void *ptr, const char *val, bool is_list)
 889 {
 890         uint32_t n;
 891         char *e;
 892         struct fw3_dscp *d = ptr;
 893
 894         if (*val == '!')
 895         {
 896                 d->invert = true;
 897                 while (isspace(*++val));
 898         }
 899
 900         for (n = 0; n < sizeof(dscp_classes) / sizeof(dscp_classes[0]); n++)
 901         {
 902                 if (strcmp(dscp_classes[n].name, val))
 903                         continue;
 904
 905                 d->set = true;
 906                 d->dscp = dscp_classes[n].dscp;
 907                 return true;
 908         }
 909
 910         n = strtoul(val, &e, 0);
 911
 912         if (e == val || *e || n > 0x3F)
 913                 return false;
 914
 915         d->set = true;
 916         d->dscp = n;
 917         return true;
 918 }
 919
 920 bool
 921 fw3_parse_setmatch(void *ptr, const char *val, bool is_list)
 922 {
 923         struct fw3_setmatch *m = ptr;
 924         char *p, *s;
 925         int i;
 926
 927         if (*val == '!')
 928         {
 929                 m->invert = true;
 930                 while (isspace(*++val));
 931         }
 932
 933         if (!(s = strdup(val)))
 934                 return false;
 935
 936         if (!(p = strtok(s, " \t")))
 937         {
 938                 free(s);
 939                 return false;
 940         }
 941
 942         snprintf(m->name, sizeof(m->name), "%s", p);
 943
 944         for (i = 0, p = strtok(NULL, " \t,");
 945              i < 3 && p != NULL;
 946              i++, p = strtok(NULL, " \t,"))
 947         {
 948                 if (!strncmp(p, "dest", 4) || !strncmp(p, "dst", 3))
 949                         m->dir[i] = "dst";
 950                 else if (!strncmp(p, "src", 3))
 951                         m->dir[i] = "src";
 952         }
 953
 954         free(s);
 955
 956         m->set = true;
 957         return true;
 958 }
 959
 960 bool
 961 fw3_parse_direction(void *ptr, const char *val, bool is_list)
 962 {
 963         bool *is_out = ptr;
 964         bool valid = true;
 965
 966         if (!strcmp(val, "in") || !strcmp(val, "ingress"))
 967                 *is_out = false;
 968         else if (!strcmp(val, "out") || !strcmp(val, "egress"))
 969                 *is_out = true;
 970         else
 971                 valid = false;
 972
 973         return valid;
 974 }
 975
 976 bool
 977 fw3_parse_cthelper(void *ptr, const char *val, bool is_list)
 978 {
 979         struct fw3_cthelpermatch m = { };
 980
 981         if (*val == '!')
 982         {
 983                 m.invert = true;
 984                 while (isspace(*++val));
 985         }
 986
 987         if (*val)
 988         {
 989                 m.set = true;
 990                 snprintf(m.name, sizeof(m.name), "%s", val);
 991                 put_value(ptr, &m, sizeof(m), is_list);
 992                 return true;
 993         }
 994
 995         return false;
 996 }
 997
 998 bool
 999 fw3_parse_setentry(void *ptr, const char *val, bool is_list)
1000 {
1001         struct fw3_setentry e = { };
1002
1003         e.value = val;
1004         put_value(ptr, &e, sizeof(e), is_list);
1005
1006         return true;
1007 }
1008
1009
1010 bool
1011 fw3_parse_options(void *s, const struct fw3_option *opts,
1012                   struct uci_section *section)
1013 {
1014         char *p, *v;
1015         bool known, inv;
1016         struct uci_element *e, *l;
1017         struct uci_option *o;
1018         const struct fw3_option *opt;
1019         struct list_head *dest;
1020         bool valid = true;
1021
1022         uci_foreach_element(&section->options, e)
1023         {
1024                 o = uci_to_option(e);
1025                 known = false;
1026
1027                 for (opt = opts; opt->name; opt++)
1028                 {
1029                         if (!opt->parse)
1030                                 continue;
1031
1032                         if (strcmp(opt->name, e->name))
1033                                 continue;
1034
1035                         if (o->type == UCI_TYPE_LIST)
1036                         {
1037                                 if (!opt->elem_size)
1038                                 {
1039                                         warn_elem(e, "must not be a list");
1040                                         valid = false;
1041                                 }
1042                                 else
1043                                 {
1044                                         dest = (struct list_head *)((char *)s + opt->offset);
1045
1046                                         uci_foreach_element(&o->v.list, l)
1047                                         {
1048                                                 if (!l->name)
1049                                                         continue;
1050
1051                                                 if (!opt->parse(dest, l->name, true))
1052                                                 {
1053                                                         warn_elem(e, "has invalid value '%s'", l->name);
1054                                                         valid = false;
1055                                                         continue;
1056                                                 }
1057                                         }
1058                                 }
1059                         }
1060                         else
1061                         {
1062                                 v = o->v.string;
1063
1064                                 if (!v)
1065                                         continue;
1066
1067                                 if (!opt->elem_size)
1068                                 {
1069                                         if (!opt->parse((char *)s + opt->offset, o->v.string, false))
1070                                         {
1071                                                 warn_elem(e, "has invalid value '%s'", o->v.string);
1072                                                 valid = false;
1073                                         }
1074                                 }
1075                                 else
1076                                 {
1077                                         inv = false;
1078                                         dest = (struct list_head *)((char *)s + opt->offset);
1079
1080                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
1081                                         {
1082                                                 /* If we encounter a sole "!" token, assume that it
1083                                                  * is meant to be part of the next token, so silently
1084                                                  * skip it and remember the state... */
1085                                                 if (!strcmp(p, "!"))
1086                                                 {
1087                                                         inv = true;
1088                                                         continue;
1089                                                 }
1090
1091                                                 /* The previous token was a sole "!", rewind pointer
1092                                                  * back by one byte to precede the value with an
1093                                                  * exclamation mark which effectively turns
1094                                                  * ("!", "foo") into ("!foo") */
1095                                                 if (inv)
1096                                                 {
1097                                                         *--p = '!';
1098                                                         inv = false;
1099                                                 }
1100
1101                                                 if (!opt->parse(dest, p, true))
1102                                                 {
1103                                                         warn_elem(e, "has invalid value '%s'", p);
1104                                                         valid = false;
1105                                                         continue;
1106                                                 }
1107                                         }
1108
1109                                         /* The last token was a sole "!" without any subsequent
1110                                          * text, so pass it to the option parser as-is. */
1111                                         if (inv && !opt->parse(dest, "!", true))
1112                                         {
1113                                                 warn_elem(e, "has invalid value '%s'", p);
1114                                                 valid = false;
1115                                         }
1116                                 }
1117                         }
1118
1119                         known = true;
1120                         break;
1121                 }
1122
1123                 if (!known)
1124                         warn_elem(e, "is unknown");
1125         }
1126
1127         return valid;
1128 }
1129
1130
1131 bool
1132 fw3_parse_blob_options(void *s, const struct fw3_option *opts,
1133                        struct blob_attr *a, const char *name)
1134 {
1135         char *p, *v, buf[16];
1136         bool known;
1137         unsigned rem, erem;
1138         struct blob_attr *o, *e;
1139         const struct fw3_option *opt;
1140         struct list_head *dest;
1141         bool valid = true;
1142
1143         blobmsg_for_each_attr(o, a, rem)
1144         {
1145                 known = false;
1146
1147                 for (opt = opts; opt->name; opt++)
1148                 {
1149                         if (!opt->parse)
1150                                 continue;
1151
1152                         if (strcmp(opt->name, blobmsg_name(o)))
1153                                 continue;
1154
1155                         if (blobmsg_type(o) == BLOBMSG_TYPE_ARRAY)
1156                         {
1157                                 if (!opt->elem_size)
1158                                 {
1159                                         fprintf(stderr, "%s: '%s' must not be a list\n",
1160                                                 name, opt->name);
1161
1162                                         valid = false;
1163                                 }
1164                                 else
1165                                 {
1166                                         dest = (struct list_head *)((char *)s + opt->offset);
1167
1168                                         blobmsg_for_each_attr(e, o, erem)
1169                                         {
1170                                                 if (blobmsg_type(e) == BLOBMSG_TYPE_INT32) {
1171                                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(e));
1172                                                         v = buf;
1173                                                 } else {
1174                                                         v = blobmsg_get_string(e);
1175                                                 }
1176
1177                                                 if (!opt->parse(dest, v, true))
1178                                                 {
1179                                                         fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1180                                                                 name, opt->name, v);
1181                                                         valid = false;
1182                                                         continue;
1183                                                 }
1184                                         }
1185                                 }
1186                         }
1187                         else
1188                         {
1189                                 if (blobmsg_type(o) == BLOBMSG_TYPE_INT32) {
1190                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(o));
1191                                         v = buf;
1192                                 } else {
1193                                         v = blobmsg_get_string(o);
1194                                 }
1195
1196                                 if (!v)
1197                                         continue;
1198
1199                                 if (!opt->elem_size)
1200                                 {
1201                                         if (!opt->parse((char *)s + opt->offset, v, false))
1202                                         {
1203                                                 fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1204                                                         name, opt->name, v);
1205                                                 valid = false;
1206                                         }
1207                                 }
1208                                 else
1209                                 {
1210                                         dest = (struct list_head *)((char *)s + opt->offset);
1211
1212                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
1213                                         {
1214                                                 if (!opt->parse(dest, p, true))
1215                                                 {
1216                                                         fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1217                                                                 name, opt->name, p);
1218                                                         valid = false;
1219                                                         continue;
1220                                                 }
1221                                         }
1222                                 }
1223                         }
1224
1225                         known = true;
1226                         break;
1227                 }
1228
1229                 if (!known && strcmp(blobmsg_name(o), "type"))
1230                         fprintf(stderr, "%s: '%s' is unknown\n", name, blobmsg_name(o));
1231         }
1232
1233         return valid;
1234 }
1235
1236
1237 const char *
1238 fw3_address_to_string(struct fw3_address *address, bool allow_invert, bool as_cidr)
1239 {
1240         char *p, ip[INET6_ADDRSTRLEN];
1241         static char buf[INET6_ADDRSTRLEN * 2 + 2];
1242         size_t rem = sizeof(buf);
1243         int len;
1244
1245         p = buf;
1246
1247         if (address->invert && allow_invert) {
1248                 *p++ = '!';
1249                 *p = 0;
1250                 rem--;
1251         }
1252
1253         inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1254                   &address->address.v4, ip, sizeof(ip));
1255
1256         len = snprintf(p, rem, "%s", ip);
1257
1258         if (len < 0 || len >= rem)
1259                 return buf;
1260
1261         rem -= len;
1262         p += len;
1263
1264         if (address->range)
1265         {
1266                 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1267                           &address->mask.v4, ip, sizeof(ip));
1268
1269                 snprintf(p, rem, "-%s", ip);
1270         }
1271         else if (!as_cidr)
1272         {
1273                 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1274                           &address->mask.v4, ip, sizeof(ip));
1275
1276                 snprintf(p, rem, "/%s", ip);
1277         }
1278         else
1279         {
1280                 snprintf(p, rem, "/%u",
1281                          fw3_netmask2bitlen(address->family, &address->mask.v6));
1282         }
1283
1284         return buf;
1285 }