options.c

   1 /*
   2  * firewall3 - 3rd OpenWrt UCI firewall implementation
   3  *
   4  *   Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include "options.h"
  20 #include "ubus.h"
  21
  22
  23 static bool
  24 parse_enum(void *ptr, const char *val, const char **values, int min, int max)
  25 {
  26         int i, l = strlen(val);
  27
  28         if (l > 0)
  29         {
  30                 for (i = 0; i <= (max - min); i++)
  31                 {
  32                         if (!strncasecmp(val, values[i], l))
  33                         {
  34                                 *((int *)ptr) = min + i;
  35                                 return true;
  36                         }
  37                 }
  38         }
  39
  40         return false;
  41 }
  42
  43
  44 const char *fw3_flag_names[__FW3_FLAG_MAX] = {
  45         "filter",
  46         "nat",
  47         "mangle",
  48         "raw",
  49
  50         "IPv4",
  51         "IPv6",
  52
  53         "ACCEPT",
  54         "REJECT",
  55         "DROP",
  56         "NOTRACK",
  57         "DNAT",
  58         "SNAT",
  59
  60         "ACCEPT",
  61         "REJECT",
  62         "DROP",
  63 };
  64
  65 static const char *limit_units[] = {
  66         "second",
  67         "minute",
  68         "hour",
  69         "day",
  70 };
  71
  72 static const char *ipset_methods[] = {
  73         "bitmap",
  74         "hash",
  75         "list",
  76 };
  77
  78 static const char *ipset_types[] = {
  79         "ip",
  80         "port",
  81         "mac",
  82         "net",
  83         "set",
  84 };
  85
  86 static const char *weekdays[] = {
  87         "monday",
  88         "tuesday",
  89         "wednesday",
  90         "thursday",
  91         "friday",
  92         "saturday",
  93         "sunday",
  94 };
  95
  96 static const char *include_types[] = {
  97         "script",
  98         "restore",
  99 };
 100
 101 static const char *reflection_sources[] = {
 102         "internal",
 103         "external",
 104 };
 105
 106
 107 bool
 108 fw3_parse_bool(void *ptr, const char *val)
 109 {
 110         if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
 111                 *((bool *)ptr) = true;
 112         else
 113                 *((bool *)ptr) = false;
 114
 115         return true;
 116 }
 117
 118 bool
 119 fw3_parse_int(void *ptr, const char *val)
 120 {
 121         int n = strtol(val, NULL, 10);
 122
 123         if (errno == ERANGE || errno == EINVAL)
 124                 return false;
 125
 126         *((int *)ptr) = n;
 127
 128         return true;
 129 }
 130
 131 bool
 132 fw3_parse_string(void *ptr, const char *val)
 133 {
 134         *((char **)ptr) = (char *)val;
 135         return true;
 136 }
 137
 138 bool
 139 fw3_parse_target(void *ptr, const char *val)
 140 {
 141         return parse_enum(ptr, val, &fw3_flag_names[FW3_FLAG_ACCEPT],
 142                           FW3_FLAG_ACCEPT, FW3_FLAG_SNAT);
 143 }
 144
 145 bool
 146 fw3_parse_limit(void *ptr, const char *val)
 147 {
 148         struct fw3_limit *limit = ptr;
 149         enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
 150         char *e;
 151         int n;
 152
 153         if (*val == '!')
 154         {
 155                 limit->invert = true;
 156                 while (isspace(*++val));
 157         }
 158
 159         n = strtol(val, &e, 10);
 160
 161         if (errno == ERANGE || errno == EINVAL)
 162                 return false;
 163
 164         if (*e && *e++ != '/')
 165                 return false;
 166
 167         if (!strlen(e))
 168                 return false;
 169
 170         if (!parse_enum(&u, e, limit_units, 0, FW3_LIMIT_UNIT_DAY))
 171                 return false;
 172
 173         limit->rate = n;
 174         limit->unit = u;
 175
 176         return true;
 177 }
 178
 179 bool
 180 fw3_parse_device(void *ptr, const char *val)
 181 {
 182         struct fw3_device *dev = ptr;
 183
 184         if (*val == '*')
 185         {
 186                 dev->set = true;
 187                 dev->any = true;
 188                 return true;
 189         }
 190
 191         if (*val == '!')
 192         {
 193                 dev->invert = true;
 194                 while (isspace(*++val));
 195         }
 196
 197         if (*val)
 198                 snprintf(dev->name, sizeof(dev->name), "%s", val);
 199         else
 200                 return false;
 201
 202         dev->set = true;
 203         return true;
 204 }
 205
 206 bool
 207 fw3_parse_address(void *ptr, const char *val)
 208 {
 209         struct fw3_address *addr = ptr;
 210         struct in_addr v4;
 211         struct in6_addr v6;
 212         char *p, *s, *e;
 213         int i, m = -1;
 214
 215         if (*val == '!')
 216         {
 217                 addr->invert = true;
 218                 while (isspace(*++val));
 219         }
 220
 221         s = strdup(val);
 222
 223         if (!s)
 224                 return false;
 225
 226         if ((p = strchr(s, '/')) != NULL)
 227         {
 228                 *p++ = 0;
 229                 m = strtoul(p, &e, 10);
 230
 231                 if ((e == p) || (*e != 0))
 232                 {
 233                         if (strchr(s, ':') || !inet_pton(AF_INET, p, &v4))
 234                         {
 235                                 free(s);
 236                                 return false;
 237                         }
 238
 239                         for (i = 0, m = 32; !(v4.s_addr & 1) && (i < 32); i++)
 240                         {
 241                                 m--;
 242                                 v4.s_addr >>= 1;
 243                         }
 244                 }
 245         }
 246         else if ((p = strchr(s, '-')) != NULL)
 247         {
 248                 *p++ = 0;
 249
 250                 if (inet_pton(AF_INET6, p, &v6))
 251                 {
 252                         addr->family = FW3_FAMILY_V6;
 253                         addr->address2.v6 = v6;
 254                         addr->range = true;
 255                 }
 256                 else if (inet_pton(AF_INET, p, &v4))
 257                 {
 258                         addr->family = FW3_FAMILY_V4;
 259                         addr->address2.v4 = v4;
 260                         addr->range = true;
 261                 }
 262                 else
 263                 {
 264                         free(s);
 265                         return false;
 266                 }
 267         }
 268
 269         if (inet_pton(AF_INET6, s, &v6))
 270         {
 271                 addr->family = FW3_FAMILY_V6;
 272                 addr->address.v6 = v6;
 273                 addr->mask = (m >= 0) ? m : 128;
 274         }
 275         else if (inet_pton(AF_INET, s, &v4))
 276         {
 277                 addr->family = FW3_FAMILY_V4;
 278                 addr->address.v4 = v4;
 279                 addr->mask = (m >= 0) ? m : 32;
 280         }
 281         else
 282         {
 283                 free(s);
 284                 return false;
 285         }
 286
 287         free(s);
 288         addr->set = true;
 289         return true;
 290 }
 291
 292 bool
 293 fw3_parse_network(void *ptr, const char *val)
 294 {
 295         struct fw3_device dev;
 296         struct fw3_address *tmp, *addr = ptr;
 297         struct list_head *list;
 298
 299         if (!fw3_parse_address(addr, val))
 300         {
 301                 memset(&dev, 0, sizeof(dev));
 302
 303                 if (!fw3_parse_device(&dev, val))
 304                         return false;
 305
 306                 list = fw3_ubus_address(dev.name);
 307
 308                 if (list)
 309                 {
 310                         list_for_each_entry(tmp, list, list)
 311                         {
 312                                 *addr = *tmp;
 313                                 addr->invert = dev.invert;
 314                                 break;
 315                         }
 316
 317                         fw3_ubus_address_free(list);
 318                 }
 319         }
 320
 321         return true;
 322 }
 323
 324 bool
 325 fw3_parse_mac(void *ptr, const char *val)
 326 {
 327         struct fw3_mac *addr = ptr;
 328         struct ether_addr *mac;
 329
 330         if (*val == '!')
 331         {
 332                 addr->invert = true;
 333                 while (isspace(*++val));
 334         }
 335
 336         if ((mac = ether_aton(val)) != NULL)
 337         {
 338                 addr->mac = *mac;
 339                 addr->set = true;
 340                 return true;
 341         }
 342
 343         return false;
 344 }
 345
 346 bool
 347 fw3_parse_port(void *ptr, const char *val)
 348 {
 349         struct fw3_port *range = ptr;
 350         uint16_t n;
 351         uint16_t m;
 352         char *p;
 353
 354         if (*val == '!')
 355         {
 356                 range->invert = true;
 357                 while (isspace(*++val));
 358         }
 359
 360         n = strtoul(val, &p, 10);
 361
 362         if (errno == ERANGE || errno == EINVAL)
 363                 return false;
 364
 365         if (*p && *p != '-' && *p != ':')
 366                 return false;
 367
 368         if (*p)
 369         {
 370                 m = strtoul(++p, NULL, 10);
 371
 372                 if (errno == ERANGE || errno == EINVAL || m < n)
 373                         return false;
 374
 375                 range->port_min = n;
 376                 range->port_max = m;
 377         }
 378         else
 379         {
 380                 range->port_min = n;
 381                 range->port_max = n;
 382         }
 383
 384         range->set = true;
 385         return true;
 386 }
 387
 388 bool
 389 fw3_parse_family(void *ptr, const char *val)
 390 {
 391         if (!strcmp(val, "any"))
 392                 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
 393         else if (!strcmp(val, "inet") || strrchr(val, '4'))
 394                 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
 395         else if (!strcmp(val, "inet6") || strrchr(val, '6'))
 396                 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
 397         else
 398                 return false;
 399
 400         return true;
 401 }
 402
 403 bool
 404 fw3_parse_icmptype(void *ptr, const char *val)
 405 {
 406         struct fw3_icmptype *icmp = ptr;
 407         bool v4 = false;
 408         bool v6 = false;
 409         char *p;
 410         int i;
 411
 412         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
 413         {
 414                 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
 415                 {
 416                         icmp->type     = fw3_icmptype_list_v4[i].type;
 417                         icmp->code_min = fw3_icmptype_list_v4[i].code_min;
 418                         icmp->code_max = fw3_icmptype_list_v4[i].code_max;
 419
 420                         v4 = true;
 421                         break;
 422                 }
 423         }
 424
 425         for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
 426         {
 427                 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
 428                 {
 429                         icmp->type6     = fw3_icmptype_list_v6[i].type;
 430                         icmp->code6_min = fw3_icmptype_list_v6[i].code_min;
 431                         icmp->code6_max = fw3_icmptype_list_v6[i].code_max;
 432
 433                         v6 = true;
 434                         break;
 435                 }
 436         }
 437
 438         if (!v4 && !v6)
 439         {
 440                 i = strtoul(val, &p, 10);
 441
 442                 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
 443                         return false;
 444
 445                 icmp->type = i;
 446
 447                 if (*p == '/')
 448                 {
 449                         val = ++p;
 450                         i = strtoul(val, &p, 10);
 451
 452                         if ((p == val) || (*p != 0) || (i > 0xFF))
 453                                 return false;
 454
 455                         icmp->code_min = i;
 456                         icmp->code_max = i;
 457                 }
 458                 else
 459                 {
 460                         icmp->code_min = 0;
 461                         icmp->code_max = 0xFF;
 462                 }
 463
 464                 icmp->type6     = icmp->type;
 465                 icmp->code6_min = icmp->code_max;
 466                 icmp->code6_max = icmp->code_max;
 467
 468                 v4 = true;
 469                 v6 = true;
 470         }
 471
 472         icmp->family = (v4 && v6) ? FW3_FAMILY_ANY
 473                                   : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
 474
 475         return true;
 476 }
 477
 478 bool
 479 fw3_parse_protocol(void *ptr, const char *val)
 480 {
 481         struct fw3_protocol *proto = ptr;
 482         struct protoent *ent;
 483
 484         if (*val == '!')
 485         {
 486                 proto->invert = true;
 487                 while (isspace(*++val));
 488         }
 489
 490         if (!strcmp(val, "all"))
 491         {
 492                 proto->any = true;
 493                 return true;
 494         }
 495         else if (!strcmp(val, "icmpv6"))
 496         {
 497                 val = "ipv6-icmp";
 498         }
 499
 500         ent = getprotobyname(val);
 501
 502         if (ent)
 503         {
 504                 proto->protocol = ent->p_proto;
 505                 return true;
 506         }
 507
 508         proto->protocol = strtoul(val, NULL, 10);
 509         return (errno != ERANGE && errno != EINVAL);
 510 }
 511
 512 bool
 513 fw3_parse_ipset_method(void *ptr, const char *val)
 514 {
 515         return parse_enum(ptr, val, ipset_methods,
 516                           FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
 517 }
 518
 519 bool
 520 fw3_parse_ipset_datatype(void *ptr, const char *val)
 521 {
 522         struct fw3_ipset_datatype *type = ptr;
 523
 524         if (!strncmp(val, "dest_", 5))
 525         {
 526                 val += 5;
 527                 type->dest = true;
 528         }
 529         else if (!strncmp(val, "dst_", 4))
 530         {
 531                 val += 4;
 532                 type->dest = true;
 533         }
 534         else if (!strncmp(val, "src_", 4))
 535         {
 536                 val += 4;
 537                 type->dest = false;
 538         }
 539
 540         return parse_enum(&type->type, val, ipset_types,
 541                           FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET);
 542 }
 543
 544 bool
 545 fw3_parse_date(void *ptr, const char *val)
 546 {
 547         unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
 548         struct tm tm = { 0 };
 549         char *p;
 550
 551         year = strtoul(val, &p, 10);
 552         if ((*p != '-' && *p) || year < 1970 || year > 2038)
 553                 goto fail;
 554         else if (!*p)
 555                 goto ret;
 556
 557         mon = strtoul(++p, &p, 10);
 558         if ((*p != '-' && *p) || mon > 12)
 559                 goto fail;
 560         else if (!*p)
 561                 goto ret;
 562
 563         day = strtoul(++p, &p, 10);
 564         if ((*p != 'T' && *p) || day > 31)
 565                 goto fail;
 566         else if (!*p)
 567                 goto ret;
 568
 569         hour = strtoul(++p, &p, 10);
 570         if ((*p != ':' && *p) || hour > 23)
 571                 goto fail;
 572         else if (!*p)
 573                 goto ret;
 574
 575         min = strtoul(++p, &p, 10);
 576         if ((*p != ':' && *p) || min > 59)
 577                 goto fail;
 578         else if (!*p)
 579                 goto ret;
 580
 581         sec = strtoul(++p, &p, 10);
 582         if (*p || sec > 59)
 583                 goto fail;
 584
 585 ret:
 586         tm.tm_year = year - 1900;
 587         tm.tm_mon  = mon - 1;
 588         tm.tm_mday = day;
 589         tm.tm_hour = hour;
 590         tm.tm_min  = min;
 591         tm.tm_sec  = sec;
 592
 593         if (mktime(&tm) >= 0)
 594         {
 595                 *((struct tm *)ptr) = tm;
 596                 return true;
 597         }
 598
 599 fail:
 600         return false;
 601 }
 602
 603 bool
 604 fw3_parse_time(void *ptr, const char *val)
 605 {
 606         unsigned int hour = 0, min = 0, sec = 0;
 607         char *p;
 608
 609         hour = strtoul(val, &p, 10);
 610         if (*p != ':' || hour > 23)
 611                 goto fail;
 612
 613         min = strtoul(++p, &p, 10);
 614         if ((*p != ':' && *p) || min > 59)
 615                 goto fail;
 616         else if (!*p)
 617                 goto ret;
 618
 619         sec = strtoul(++p, &p, 10);
 620         if (*p || sec > 59)
 621                 goto fail;
 622
 623 ret:
 624         *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
 625         return true;
 626
 627 fail:
 628         return false;
 629 }
 630
 631 bool
 632 fw3_parse_weekdays(void *ptr, const char *val)
 633 {
 634         unsigned int w = 0;
 635         char *p, *s;
 636
 637         if (*val == '!')
 638         {
 639                 setbit(*(uint8_t *)ptr, 0);
 640                 while (isspace(*++val));
 641         }
 642
 643         if (!(s = strdup(val)))
 644                 return false;
 645
 646         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 647         {
 648                 if (!parse_enum(&w, p, weekdays, 1, 7))
 649                 {
 650                         w = strtoul(p, &p, 10);
 651
 652                         if (*p || w < 1 || w > 7)
 653                         {
 654                                 free(s);
 655                                 return false;
 656                         }
 657                 }
 658
 659                 setbit(*(uint8_t *)ptr, w);
 660         }
 661
 662         free(s);
 663         return true;
 664 }
 665
 666 bool
 667 fw3_parse_monthdays(void *ptr, const char *val)
 668 {
 669         unsigned int d;
 670         char *p, *s;
 671
 672         if (*val == '!')
 673         {
 674                 setbit(*(uint32_t *)ptr, 0);
 675                 while (isspace(*++val));
 676         }
 677
 678         if (!(s = strdup(val)))
 679                 return false;
 680
 681         for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
 682         {
 683                 d = strtoul(p, &p, 10);
 684
 685                 if (*p || d < 1 || d > 31)
 686                 {
 687                         free(s);
 688                         return false;
 689                 }
 690
 691                 setbit(*(uint32_t *)ptr, d);
 692         }
 693
 694         free(s);
 695         return true;
 696 }
 697
 698 bool
 699 fw3_parse_include_type(void *ptr, const char *val)
 700 {
 701         return parse_enum(ptr, val, include_types,
 702                           FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
 703 }
 704
 705 bool
 706 fw3_parse_reflection_source(void *ptr, const char *val)
 707 {
 708         return parse_enum(ptr, val, reflection_sources,
 709                           FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
 710 }
 711
 712
 713 void
 714 fw3_parse_options(void *s, const struct fw3_option *opts,
 715                   struct uci_section *section)
 716 {
 717         char *p, *v;
 718         bool known;
 719         struct uci_element *e, *l;
 720         struct uci_option *o;
 721         const struct fw3_option *opt;
 722         struct list_head *item;
 723         struct list_head *dest;
 724
 725         uci_foreach_element(&section->options, e)
 726         {
 727                 o = uci_to_option(e);
 728                 known = false;
 729
 730                 for (opt = opts; opt->name; opt++)
 731                 {
 732                         if (!opt->parse)
 733                                 continue;
 734
 735                         if (strcmp(opt->name, e->name))
 736                                 continue;
 737
 738                         if (o->type == UCI_TYPE_LIST)
 739                         {
 740                                 if (!opt->elem_size)
 741                                 {
 742                                         warn_elem(e, "must not be a list");
 743                                 }
 744                                 else
 745                                 {
 746                                         uci_foreach_element(&o->v.list, l)
 747                                         {
 748                                                 if (!l->name)
 749                                                         continue;
 750
 751                                                 item = malloc(opt->elem_size);
 752
 753                                                 if (!item)
 754                                                         continue;
 755
 756                                                 memset(item, 0, opt->elem_size);
 757
 758                                                 if (!opt->parse(item, l->name))
 759                                                 {
 760                                                         warn_elem(e, "has invalid value '%s'", l->name);
 761                                                         free(item);
 762                                                         continue;
 763                                                 }
 764
 765                                                 dest = (struct list_head *)((char *)s + opt->offset);
 766                                                 list_add_tail(item, dest);
 767                                         }
 768                                 }
 769                         }
 770                         else
 771                         {
 772                                 v = o->v.string;
 773
 774                                 if (!v)
 775                                         continue;
 776
 777                                 /* protocol "tcpudp" compatibility hack */
 778                                 if (opt->parse == fw3_parse_protocol && !strcmp(v, "tcpudp"))
 779                                         v = strdup("tcp udp");
 780
 781                                 if (!opt->elem_size)
 782                                 {
 783                                         if (!opt->parse((char *)s + opt->offset, o->v.string))
 784                                                 warn_elem(e, "has invalid value '%s'", o->v.string);
 785                                 }
 786                                 else
 787                                 {
 788                                         for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
 789                                         {
 790                                                 item = malloc(opt->elem_size);
 791
 792                                                 if (!item)
 793                                                         continue;
 794
 795                                                 memset(item, 0, opt->elem_size);
 796
 797                                                 if (!opt->parse(item, p))
 798                                                 {
 799                                                         warn_elem(e, "has invalid value '%s'", p);
 800                                                         free(item);
 801                                                         continue;
 802                                                 }
 803
 804                                                 dest = (struct list_head *)((char *)s + opt->offset);
 805                                                 list_add_tail(item, dest);
 806                                         }
 807                                 }
 808
 809                                 if (v != o->v.string)
 810                                         free(v);
 811                         }
 812
 813                         known = true;
 814                         break;
 815                 }
 816
 817                 if (!known)
 818                         warn_elem(e, "is unknown");
 819         }
 820 }
 821
 822
 823 void
 824 fw3_format_in_out(struct fw3_device *in, struct fw3_device *out)
 825 {
 826         if (in && !in->any)
 827                 fw3_pr(" %s-i %s", in->invert ? "! " : "", in->name);
 828
 829         if (out && !out->any)
 830                 fw3_pr(" %s-o %s", out->invert ? "! " : "", out->name);
 831 }
 832
 833 void
 834 fw3_format_src_dest(struct fw3_address *src, struct fw3_address *dest)
 835 {
 836         char s[INET6_ADDRSTRLEN];
 837
 838         if ((src && src->range) || (dest && dest->range))
 839                 fw3_pr(" -m iprange");
 840
 841         if (src && src->set)
 842         {
 843                 if (src->range)
 844                 {
 845                         inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 846                                           &src->address.v4, s, sizeof(s));
 847
 848                         fw3_pr(" %s--src-range %s", src->invert ? "! " : "", s);
 849
 850                         inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 851                                           &src->address2.v4, s, sizeof(s));
 852
 853                         fw3_pr("-%s", s);
 854                 }
 855                 else
 856                 {
 857                         inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 858                                           &src->address.v4, s, sizeof(s));
 859
 860                         fw3_pr(" %s-s %s/%u", src->invert ? "! " : "", s, src->mask);
 861                 }
 862         }
 863
 864         if (dest && dest->set)
 865         {
 866                 if (dest->range)
 867                 {
 868                         inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 869                                           &dest->address.v4, s, sizeof(s));
 870
 871                         fw3_pr(" %s--dst-range %s", dest->invert ? "! " : "", s);
 872
 873                         inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 874                                           &dest->address2.v4, s, sizeof(s));
 875
 876                         fw3_pr("-%s", s);
 877                 }
 878                 else
 879                 {
 880                         inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
 881                                           &dest->address.v4, s, sizeof(s));
 882
 883                         fw3_pr(" %s-d %s/%u", dest->invert ? "! " : "", s, dest->mask);
 884                 }
 885         }
 886 }
 887
 888 void
 889 fw3_format_sport_dport(struct fw3_port *sp, struct fw3_port *dp)
 890 {
 891         if (sp && sp->set)
 892         {
 893                 if (sp->port_min == sp->port_max)
 894                         fw3_pr(" %s--sport %u", sp->invert ? "! " : "", sp->port_min);
 895                 else
 896                         fw3_pr(" %s--sport %u:%u",
 897                                sp->invert ? "! " : "", sp->port_min, sp->port_max);
 898         }
 899
 900         if (dp && dp->set)
 901         {
 902                 if (dp->port_min == dp->port_max)
 903                         fw3_pr(" %s--dport %u", dp->invert ? "! " : "", dp->port_min);
 904                 else
 905                         fw3_pr(" %s--dport %u:%u",
 906                                dp->invert ? "! " : "", dp->port_min, dp->port_max);
 907         }
 908 }
 909
 910 void
 911 fw3_format_mac(struct fw3_mac *mac)
 912 {
 913         if (!mac)
 914                 return;
 915
 916         fw3_pr(" -m mac %s--mac-source %s",
 917                mac->invert ? "! " : "", ether_ntoa(&mac->mac));
 918 }
 919
 920 void
 921 fw3_format_protocol(struct fw3_protocol *proto, enum fw3_family family)
 922 {
 923         uint16_t pr;
 924
 925         if (!proto)
 926                 return;
 927
 928         pr = proto->protocol;
 929
 930         if (pr == 1 && family == FW3_FAMILY_V6)
 931                 pr = 58;
 932
 933         if (proto->any)
 934                 fw3_pr(" -p all");
 935         else
 936                 fw3_pr(" %s-p %u", proto->invert ? "! " : "", pr);
 937 }
 938
 939 void
 940 fw3_format_icmptype(struct fw3_icmptype *icmp, enum fw3_family family)
 941 {
 942         if (!icmp)
 943                 return;
 944
 945         if (family != FW3_FAMILY_V6)
 946         {
 947                 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
 948                         fw3_pr(" %s--icmp-type %u", icmp->invert ? "! " : "", icmp->type);
 949                 else
 950                         fw3_pr(" %s--icmp-type %u/%u",
 951                                    icmp->invert ? "! " : "", icmp->type, icmp->code_min);
 952         }
 953         else
 954         {
 955                 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
 956                         fw3_pr(" %s--icmpv6-type %u", icmp->invert ? "! " : "", icmp->type6);
 957                 else
 958                         fw3_pr(" %s--icmpv6-type %u/%u",
 959                                    icmp->invert ? "! " : "", icmp->type6, icmp->code6_min);
 960         }
 961 }
 962
 963 void
 964 fw3_format_limit(struct fw3_limit *limit)
 965 {
 966         if (!limit)
 967                 return;
 968
 969         if (limit->rate > 0)
 970         {
 971                 fw3_pr(" -m limit %s--limit %u/%s",
 972                        limit->invert ? "! " : "",
 973                        limit->rate, limit_units[limit->unit]);
 974
 975                 if (limit->burst > 0)
 976                         fw3_pr(" --limit-burst %u", limit->burst);
 977         }
 978 }
 979
 980 void
 981 fw3_format_ipset(struct fw3_ipset *ipset, bool invert)
 982 {
 983         bool first = true;
 984         const char *name = NULL;
 985         struct fw3_ipset_datatype *type;
 986
 987         if (!ipset)
 988                 return;
 989
 990         if (ipset->external && *ipset->external)
 991                 name = ipset->external;
 992         else
 993                 name = ipset->name;
 994
 995         fw3_pr(" -m set %s--match-set %s", invert ? "! " : "", name);
 996
 997         list_for_each_entry(type, &ipset->datatypes, list)
 998         {
 999                 fw3_pr("%c%s", first ? ' ' : ',', type->dest ? "dst" : "src");
1000                 first = false;
1001         }
1002 }
1003
1004 void
1005 fw3_format_time(struct fw3_time *time)
1006 {
1007         int i;
1008         struct tm empty = { 0 };
1009         char buf[sizeof("9999-99-99T23:59:59\0")];
1010         bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
1011         bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
1012         bool first;
1013
1014         if (!d1 && !d2 && !time->timestart && !time->timestop &&
1015             !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
1016         {
1017                 return;
1018         }
1019
1020         fw3_pr(" -m time");
1021
1022         if (time->utc)
1023                 fw3_pr(" --utc");
1024
1025         if (d1)
1026         {
1027                 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
1028                 fw3_pr(" --datestart %s", buf);
1029         }
1030
1031         if (d2)
1032         {
1033                 strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
1034                 fw3_pr(" --datestop %s", buf);
1035         }
1036
1037         if (time->timestart)
1038         {
1039                 fw3_pr(" --timestart %02d:%02d:%02d",
1040                        time->timestart / 3600,
1041                        time->timestart % 3600 / 60,
1042                        time->timestart % 60);
1043         }
1044
1045         if (time->timestop)
1046         {
1047                 fw3_pr(" --timestop %02d:%02d:%02d",
1048                        time->timestop / 3600,
1049                        time->timestop % 3600 / 60,
1050                        time->timestop % 60);
1051         }
1052
1053         if (time->monthdays & 0xFFFFFFFE)
1054         {
1055                 fw3_pr(" %s--monthdays", hasbit(time->monthdays, 0) ? "! " : "");
1056
1057                 for (i = 1, first = true; i < 32; i++)
1058                 {
1059                         if (hasbit(time->monthdays, i))
1060                         {
1061                                 fw3_pr("%c%u", first ? ' ' : ',', i);
1062                                 first = false;
1063                         }
1064                 }
1065         }
1066
1067         if (time->weekdays & 0xFE)
1068         {
1069                 fw3_pr(" %s--weekdays", hasbit(time->weekdays, 0) ? "! " : "");
1070
1071                 for (i = 1, first = true; i < 8; i++)
1072                 {
1073                         if (hasbit(time->weekdays, i))
1074                         {
1075                                 fw3_pr("%c%u", first ? ' ' : ',', i);
1076                                 first = false;
1077                         }
1078                 }
1079         }
1080 }
1081
1082 void
1083 __fw3_format_comment(const char *comment, ...)
1084 {
1085         va_list ap;
1086         int len = 0;
1087         const char *c;
1088
1089         if (!comment || !*comment)
1090                 return;
1091
1092         fw3_pr(" -m comment --comment \"");
1093
1094         c = comment;
1095
1096         va_start(ap, comment);
1097
1098         do
1099         {
1100                 while (*c)
1101                 {
1102                         switch (*c)
1103                         {
1104                         case '"':
1105                         case '$':
1106                         case '`':
1107                         case '\\':
1108                                 fw3_pr("\\");
1109                                 /* fall through */
1110
1111                         default:
1112                                 fw3_pr("%c", *c);
1113                                 break;
1114                         }
1115
1116                         c++;
1117
1118                         if (len++ >= 255)
1119                                 goto end;
1120                 }
1121
1122                 c = va_arg(ap, const char *);
1123         }
1124         while (c);
1125
1126 end:
1127         va_end(ap);
1128         fw3_pr("\"");
1129 }
1130
1131 void
1132 fw3_format_extra(const char *extra)
1133 {
1134         if (!extra || !*extra)
1135                 return;
1136
1137         fw3_pr(" %s", extra);
1138 }