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, *tmp;
 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
 347                 if (is_list)
 348                 {
 349                         list_splice_tail(&addr_list, ptr);
 350                 }
 351                 else if (!list_empty(&addr_list))
 352                 {
 353                         memcpy(ptr, list_first_entry(&addr_list, typeof(*addr), list),
 354                                sizeof(*addr));
 355
 356                         list_for_each_entry_safe(addr, tmp, &addr_list, list)
 357                                 free(addr);
 358                 }
 359         }
 360
 361         return true;
 362 }
 363
 364 bool
 365 fw3_parse_mac(void *ptr, const char *val, bool is_list)
 366 {
 367         struct fw3_mac addr = { };
 368         struct ether_addr *mac;
 369
 370         if (*val == '!')
 371         {
 372                 addr.invert = true;
 373                 while (isspace(*++val));
 374         }
 375
 376         if ((mac = ether_aton(val)) != NULL)
 377         {
 378                 addr.mac = *mac;
 379                 addr.set = true;
 380
 381                 put_value(ptr, &addr, sizeof(addr), is_list);
 382                 return true;
 383         }
 384
 385         return false;
 386 }
 387
 388 bool
 389 fw3_parse_port(void *ptr, const char *val, bool is_list)
 390 {
 391         struct fw3_port range = { };
 392         uint16_t n;
 393         uint16_t m;
 394         char *p;
 395
 396         if (*val == '!')
 397         {
 398                 range.invert = true;
 399                 while (isspace(*++val));
 400         }
 401
 402         n = strtoul(val, &p, 10);
 403
 404         if (errno == ERANGE || errno == EINVAL)
 405                 return false;
 406
 407         if (*p && *p != '-' && *p != ':')
 408                 return false;
 409
 410         if (*p)
 411         {
 412                 m = strtoul(++p, NULL, 10);
 413
 414                 if (errno == ERANGE || errno == EINVAL || m < n)
 415                         return false;
 416
 417                 range.port_min = n;
 418                 range.port_max = m;
 419         }
 420         else
 421         {
 422                 range.port_min = n;
 423                 range.port_max = n;
 424         }
 425
 426         range.set = true;
 427         put_value(ptr, &range, sizeof(range), is_list);
 428         return true;
 429 }
 430
 431 bool
 432 fw3_parse_family(void *ptr, const char *val, bool is_list)
 433 {
 434         if (!strcmp(val, "any"))
 435                 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
 436         else if (!strcmp(val, "inet") || strrchr(val, '4'))
 437                 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
 438         else if (!strcmp(val, "inet6") || strrchr(val, '6'))
 439                 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
 440         else
 441                 return false;
 442
 443         return true;
 444 }
 445
 446 bool
 447 fw3_parse_icmptype(void *ptr, const char *val, bool is_list)
 448 {
 449         struct fw3_icmptype icmp = { };
 450         bool v4 = false;
 451         bool v6 = false;
 452         char *p;
 453         int i;
 454
 455         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
 456         {
 457                 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
 458                 {
 459                         icmp.type     = fw3_icmptype_list_v4[i].type;
 460                         icmp.code_min = fw3_icmptype_list_v4[i].code_min;
 461                         icmp.code_max = fw3_icmptype_list_v4[i].code_max;
 462
 463                         v4 = true;
 464                         break;
 465                 }
 466         }
 467
 468         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
 469         {
 470                 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
 471                 {
 472                         icmp.type6     = fw3_icmptype_list_v6[i].type;
 473                         icmp.code6_min = fw3_icmptype_list_v6[i].code_min;
 474                         icmp.code6_max = fw3_icmptype_list_v6[i].code_max;
 475
 476                         v6 = true;
 477                         break;
 478                 }
 479         }
 480
 481         if (!v4 && !v6)
 482         {
 483                 i = strtoul(val, &p, 10);
 484
 485                 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
 486                         return false;
 487
 488                 icmp.type = i;
 489
 490                 if (*p == '/')
 491                 {
 492                         val = ++p;
 493                         i = strtoul(val, &p, 10);
 494
 495                         if ((p == val) || (*p != 0) || (i > 0xFF))
 496                                 return false;
 497
 498                         icmp.code_min = i;
 499                         icmp.code_max = i;
 500                 }
 501                 else
 502                 {
 503                         icmp.code_min = 0;
 504                         icmp.code_max = 0xFF;
 505                 }
 506
 507                 icmp.type6     = icmp.type;
 508                 icmp.code6_min = icmp.code_max;
 509                 icmp.code6_max = icmp.code_max;
 510
 511                 v4 = true;
 512                 v6 = true;
 513         }
 514
 515         icmp.family = (v4 && v6) ? FW3_FAMILY_ANY
 516                                  : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
 517
 518         put_value(ptr, &icmp, sizeof(icmp), is_list);
 519         return true;
 520 }
 521
 522 bool
 523 fw3_parse_protocol(void *ptr, const char *val, bool is_list)
 524 {
 525         struct fw3_protocol proto = { };
 526         struct protoent *ent;
 527         char *e;
 528
 529         if (*val == '!')
 530         {
 531                 proto.invert = true;
 532                 while (isspace(*++val));
 533         }
 534
 535         if (!strcmp(val, "all"))
 536         {
 537                 proto.any = true;
 538                 put_value(ptr, &proto, sizeof(proto), is_list);
 539                 return true;
 540         }
 541         else if (!strcmp(val, "icmpv6"))
 542         {
 543                 val = "ipv6-icmp";
 544         }
 545         else if (!strcmp(val, "tcpudp"))
 546         {
 547                 proto.protocol = 6;
 548                 if (put_value(ptr, &proto, sizeof(proto), is_list))
 549                 {
 550                         proto.protocol = 17;
 551                         put_value(ptr, &proto, sizeof(proto), is_list);
 552                 }
 553
 554                 return true;
 555         }
 556
 557         ent = getprotobyname(val);
 558
 559         if (ent)
 560         {
 561                 proto.protocol = ent->p_proto;
 562                 put_value(ptr, &proto, sizeof(proto), is_list);
 563                 return true;
 564         }
 565
 566         proto.protocol = strtoul(val, &e, 10);
 567
 568         if ((e == val) || (*e != 0))
 569                 return false;
 570
 571         put_value(ptr, &proto, sizeof(proto), is_list);
 572         return true;
 573 }
 574
 575 bool
 576 fw3_parse_ipset_method(void *ptr, const char *val, bool is_list)
 577 {
 578         return parse_enum(ptr, val, &fw3_ipset_method_names[FW3_IPSET_METHOD_BITMAP],
 579                           FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
 580 }
 581
 582 bool
 583 fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list)
 584 {
 585         struct fw3_ipset_datatype type = { };
 586
 587         type.dir = "src";
 588
 589         if (!strncmp(val, "dest_", 5))
 590         {
 591                 val += 5;
 592                 type.dir = "dst";
 593         }
 594         else if (!strncmp(val, "dst_", 4))
 595         {
 596                 val += 4;
 597                 type.dir = "dst";
 598         }
 599         else if (!strncmp(val, "src_", 4))
 600         {
 601                 val += 4;
 602                 type.dir = "src";
 603         }
 604
 605         if (parse_enum(&type.type, val, &fw3_ipset_type_names[FW3_IPSET_TYPE_IP],
 606                        FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET))
 607         {
 608                 put_value(ptr, &type, sizeof(type), is_list);
 609                 return true;
 610         }
 611
 612         return false;
 613 }
 614
 615 bool
 616 fw3_parse_date(void *ptr, const char *val, bool is_list)
 617 {
 618         unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
 619         struct tm tm = { 0 };
 620         char *p;
 621
 622         year = strtoul(val, &p, 10);
 623         if ((*p != '-' && *p) || year < 1970 || year > 2038)
 624                 goto fail;
 625         else if (!*p)
 626                 goto ret;
 627
 628         mon = strtoul(++p, &p, 10);
 629         if ((*p != '-' && *p) || mon > 12)
 630                 goto fail;
 631         else if (!*p)
 632                 goto ret;
 633
 634         day = strtoul(++p, &p, 10);
 635         if ((*p != 'T' && *p) || day > 31)
 636                 goto fail;
 637         else if (!*p)
 638                 goto ret;
 639
 640         hour = strtoul(++p, &p, 10);
 641         if ((*p != ':' && *p) || hour > 23)
 642                 goto fail;
 643         else if (!*p)
 644                 goto ret;
 645
 646         min = strtoul(++p, &p, 10);
 647         if ((*p != ':' && *p) || min > 59)
 648                 goto fail;
 649         else if (!*p)
 650                 goto ret;
 651
 652         sec = strtoul(++p, &p, 10);
 653         if (*p || sec > 59)
 654                 goto fail;
 655
 656 ret:
 657         tm.tm_year = year - 1900;
 658         tm.tm_mon  = mon - 1;
 659         tm.tm_mday = day;
 660         tm.tm_hour = hour;
 661         tm.tm_min  = min;
 662         tm.tm_sec  = sec;
 663
 664         if (mktime(&tm) >= 0)
 665         {
 666                 *((struct tm *)ptr) = tm;
 667                 return true;
 668         }
 669
 670 fail:
 671         return false;
 672 }
 673
 674 bool
 675 fw3_parse_time(void *ptr, const char *val, bool is_list)
 676 {
 677         unsigned int hour = 0, min = 0, sec = 0;
 678         char *p;
 679
 680         hour = strtoul(val, &p, 10);
 681         if (*p != ':' || hour > 23)
 682                 goto fail;
 683
 684         min = strtoul(++p, &p, 10);
 685         if ((*p != ':' && *p) || min > 59)
 686                 goto fail;
 687         else if (!*p)
 688                 goto ret;
 689
 690         sec = strtoul(++p, &p, 10);
 691         if (*p || sec > 59)
 692                 goto fail;
 693
 694 ret:
 695         *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
 696         return true;
 697
 698 fail:
 699         return false;
 700 }
 701
 702 bool
 703 fw3_parse_weekdays(void *ptr, const char *val, bool is_list)
 704 {
 705         unsigned int w = 0;
 706         char *p, *s;
 707
 708         if (*val == '!')
 709         {
 710                 setbit(*(uint8_t *)ptr, 0);
 711                 while (isspace(*++val));
 712         }
 713
 714         if (!(s = strdup(val)))
 715                 return false;
 716
 717         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 718         {
 719                 if (!parse_enum(&w, p, weekdays, 1, 7))
 720                 {
 721                         w = strtoul(p, &p, 10);
 722
 723                         if (*p || w < 1 || w > 7)
 724                         {
 725                                 free(s);
 726                                 return false;
 727                         }
 728                 }
 729
 730                 setbit(*(uint8_t *)ptr, w);
 731         }
 732
 733         free(s);
 734         return true;
 735 }
 736
 737 bool
 738 fw3_parse_monthdays(void *ptr, const char *val, bool is_list)
 739 {
 740         unsigned int d;
 741         char *p, *s;
 742
 743         if (*val == '!')
 744         {
 745                 setbit(*(uint32_t *)ptr, 0);
 746                 while (isspace(*++val));
 747         }
 748
 749         if (!(s = strdup(val)))
 750                 return false;
 751
 752         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 753         {
 754                 d = strtoul(p, &p, 10);
 755
 756                 if (*p || d < 1 || d > 31)
 757                 {
 758                         free(s);
 759                         return false;
 760                 }
 761
 762                 setbit(*(uint32_t *)ptr, d);
 763         }
 764
 765         free(s);
 766         return true;
 767 }
 768
 769 bool
 770 fw3_parse_include_type(void *ptr, const char *val, bool is_list)
 771 {
 772         return parse_enum(ptr, val, include_types,
 773                           FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
 774 }
 775
 776 bool
 777 fw3_parse_reflection_source(void *ptr, const char *val, bool is_list)
 778 {
 779         return parse_enum(ptr, val, reflection_sources,
 780                           FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
 781 }
 782
 783 bool
 784 fw3_parse_mark(void *ptr, const char *val, bool is_list)
 785 {
 786         uint32_t n;
 787         char *s, *e;
 788         struct fw3_mark *m = ptr;
 789
 790         if (*val == '!')
 791         {
 792                 m->invert = true;
 793                 while (isspace(*++val));
 794         }
 795
 796         if ((s = strchr(val, '/')) != NULL)
 797                 *s++ = 0;
 798
 799         n = strtoul(val, &e, 0);
 800
 801         if (e == val || *e)
 802                 return false;
 803
 804         m->mark = n;
 805         m->mask = 0xFFFFFFFF;
 806
 807         if (s)
 808         {
 809                 n = strtoul(s, &e, 0);
 810
 811                 if (e == s || *e)
 812                         return false;
 813
 814                 m->mask = n;
 815         }
 816
 817         m->set = true;
 818         return true;
 819 }
 820
 821 bool
 822 fw3_parse_setmatch(void *ptr, const char *val, bool is_list)
 823 {
 824         struct fw3_setmatch *m = ptr;
 825         char *p, *s;
 826         int i;
 827
 828         if (*val == '!')
 829         {
 830                 m->invert = true;
 831                 while (isspace(*++val));
 832         }
 833
 834         if (!(s = strdup(val)))
 835                 return false;
 836
 837         if (!(p = strtok(s, " \t")))
 838         {
 839                 free(s);
 840                 return false;
 841         }
 842
 843         strncpy(m->name, p, sizeof(m->name));
 844
 845         for (i = 0, p = strtok(NULL, " \t,");
 846              i < 3 && p != NULL;
 847              i++, p = strtok(NULL, " \t,"))
 848         {
 849                 if (!strncmp(p, "dest", 4) || !strncmp(p, "dst", 3))
 850                         m->dir[i] = "dst";
 851                 else if (!strncmp(p, "src", 3))
 852                         m->dir[i] = "src";
 853         }
 854
 855         free(s);
 856
 857         m->set = true;
 858         return true;
 859 }
 860
 861 bool
 862 fw3_parse_direction(void *ptr, const char *val, bool is_list)
 863 {
 864         bool *is_out = ptr;
 865         bool valid = true;
 866
 867         if (!strcmp(val, "in") || !strcmp(val, "ingress"))
 868                 *is_out = false;
 869         else if (!strcmp(val, "out") || !strcmp(val, "egress"))
 870                 *is_out = true;
 871         else
 872                 valid = false;
 873
 874         return valid;
 875 }
 876
 877
 878 bool
 879 fw3_parse_options(void *s, const struct fw3_option *opts,
 880                   struct uci_section *section)
 881 {
 882         char *p, *v;
 883         bool known;
 884         struct uci_element *e, *l;
 885         struct uci_option *o;
 886         const struct fw3_option *opt;
 887         struct list_head *dest;
 888         bool valid = true;
 889
 890         uci_foreach_element(&section->options, e)
 891         {
 892                 o = uci_to_option(e);
 893                 known = false;
 894
 895                 for (opt = opts; opt->name; opt++)
 896                 {
 897                         if (!opt->parse)
 898                                 continue;
 899
 900                         if (strcmp(opt->name, e->name))
 901                                 continue;
 902
 903                         if (o->type == UCI_TYPE_LIST)
 904                         {
 905                                 if (!opt->elem_size)
 906                                 {
 907                                         warn_elem(e, "must not be a list");
 908                                         valid = false;
 909                                 }
 910                                 else
 911                                 {
 912                                         dest = (struct list_head *)((char *)s + opt->offset);
 913
 914                                         uci_foreach_element(&o->v.list, l)
 915                                         {
 916                                                 if (!l->name)
 917                                                         continue;
 918
 919                                                 if (!opt->parse(dest, l->name, true))
 920                                                 {
 921                                                         warn_elem(e, "has invalid value '%s'", l->name);
 922                                                         valid = false;
 923                                                         continue;
 924                                                 }
 925                                         }
 926                                 }
 927                         }
 928                         else
 929                         {
 930                                 v = o->v.string;
 931
 932                                 if (!v)
 933                                         continue;
 934
 935                                 if (!opt->elem_size)
 936                                 {
 937                                         if (!opt->parse((char *)s + opt->offset, o->v.string, false))
 938                                         {
 939                                                 warn_elem(e, "has invalid value '%s'", o->v.string);
 940                                                 valid = false;
 941                                         }
 942                                 }
 943                                 else
 944                                 {
 945                                         dest = (struct list_head *)((char *)s + opt->offset);
 946
 947                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
 948                                         {
 949                                                 if (!opt->parse(dest, p, true))
 950                                                 {
 951                                                         warn_elem(e, "has invalid value '%s'", p);
 952                                                         valid = false;
 953                                                         continue;
 954                                                 }
 955                                         }
 956                                 }
 957                         }
 958
 959                         known = true;
 960                         break;
 961                 }
 962
 963                 if (!known)
 964                         warn_elem(e, "is unknown");
 965         }
 966
 967         return valid;
 968 }
 969
 970
 971 bool
 972 fw3_parse_blob_options(void *s, const struct fw3_option *opts,
 973                   struct blob_attr *a)
 974 {
 975         char *p, *v, buf[16];
 976         bool known;
 977         unsigned rem, erem;
 978         struct blob_attr *o, *e;
 979         const struct fw3_option *opt;
 980         struct list_head *dest;
 981         bool valid = true;
 982
 983         blobmsg_for_each_attr(o, a, rem)
 984         {
 985                 known = false;
 986
 987                 for (opt = opts; opt->name; opt++)
 988                 {
 989                         if (!opt->parse)
 990                                 continue;
 991
 992                         if (strcmp(opt->name, blobmsg_name(o)))
 993                                 continue;
 994
 995                         if (blobmsg_type(o) == BLOBMSG_TYPE_ARRAY)
 996                         {
 997                                 if (!opt->elem_size)
 998                                 {
 999                                         fprintf(stderr, "%s must not be a list\n", opt->name);
1000                                         valid = false;
1001                                 }
1002                                 else
1003                                 {
1004                                         dest = (struct list_head *)((char *)s + opt->offset);
1005
1006                                         blobmsg_for_each_attr(e, o, erem)
1007                                         {
1008                                                 if (blobmsg_type(e) == BLOBMSG_TYPE_INT32) {
1009                                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(e));
1010                                                         v = buf;
1011                                                 } else {
1012                                                         v = blobmsg_get_string(e);
1013                                                 }
1014
1015                                                 if (!opt->parse(dest, v, true))
1016                                                 {
1017                                                         fprintf(stderr, "%s has invalid value '%s'\n", opt->name, v);
1018                                                         valid = false;
1019                                                         continue;
1020                                                 }
1021                                         }
1022                                 }
1023                         }
1024                         else
1025                         {
1026                                 if (blobmsg_type(o) == BLOBMSG_TYPE_INT32) {
1027                                         snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(o));
1028                                         v = buf;
1029                                 } else {
1030                                         v = blobmsg_get_string(o);
1031                                 }
1032
1033                                 if (!v)
1034                                         continue;
1035
1036                                 if (!opt->elem_size)
1037                                 {
1038                                         if (!opt->parse((char *)s + opt->offset, v, false))
1039                                         {
1040                                                 fprintf(stderr, "%s has invalid value '%s'\n", opt->name, v);
1041                                                 valid = false;
1042                                         }
1043                                 }
1044                                 else
1045                                 {
1046                                         dest = (struct list_head *)((char *)s + opt->offset);
1047
1048                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
1049                                         {
1050                                                 if (!opt->parse(dest, p, true))
1051                                                 {
1052                                                         fprintf(stderr, "%s has invalid value '%s'\n", opt->name, p);
1053                                                         valid = false;
1054                                                         continue;
1055                                                 }
1056                                         }
1057                                 }
1058                         }
1059
1060                         known = true;
1061                         break;
1062                 }
1063
1064                 if (!known)
1065                         fprintf(stderr, "%s is unknown\n", blobmsg_name(o));
1066         }
1067
1068         return valid;
1069 }
1070
1071
1072 const char *
1073 fw3_address_to_string(struct fw3_address *address, bool allow_invert)
1074 {
1075         char *p, ip[INET6_ADDRSTRLEN];
1076         static char buf[INET6_ADDRSTRLEN * 2 + 2];
1077
1078         p = buf;
1079
1080         if (address->invert && allow_invert)
1081                 p += sprintf(p, "!");
1082
1083         inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1084                   &address->address.v4, ip, sizeof(ip));
1085
1086         p += sprintf(p, "%s", ip);
1087
1088         if (address->range)
1089         {
1090                 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1091                           &address->address2.v4, ip, sizeof(ip));
1092
1093                 p += sprintf(p, "-%s", ip);
1094         }
1095         else
1096         {
1097                 p += sprintf(p, "/%u", address->mask);
1098         }
1099
1100         return buf;
1101 }