options.h

   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 #ifndef __FW3_OPTIONS_H
  20 #define __FW3_OPTIONS_H
  21
  22
  23 #include <errno.h>
  24
  25 #include <stdlib.h>
  26 #include <stdarg.h>
  27 #include <stdbool.h>
  28
  29 #include <ctype.h>
  30 #include <string.h>
  31
  32 #include <netdb.h>
  33 #include <arpa/inet.h>
  34 #include <sys/socket.h>
  35 #define _LINUX_IN_H
  36 #define _LINUX_IN6_H
  37 #include <netinet/in.h>
  38 #include <netinet/ether.h>
  39
  40 #include <time.h>
  41
  42 #include <uci.h>
  43
  44 #include <libubox/list.h>
  45 #include <libubox/utils.h>
  46 #include <libubox/blobmsg.h>
  47
  48 #include "icmp_codes.h"
  49 #include "utils.h"
  50
  51
  52 enum fw3_table
  53 {
  54         FW3_TABLE_FILTER = 0,
  55         FW3_TABLE_NAT    = 1,
  56         FW3_TABLE_MANGLE = 2,
  57         FW3_TABLE_RAW    = 3,
  58 };
  59
  60 enum fw3_family
  61 {
  62         FW3_FAMILY_ANY = 0,
  63         FW3_FAMILY_V4  = 4,
  64         FW3_FAMILY_V6  = 5,
  65 };
  66
  67 enum fw3_flag
  68 {
  69         FW3_FLAG_UNSPEC        = 0,
  70         FW3_FLAG_ACCEPT        = 6,
  71         FW3_FLAG_REJECT        = 7,
  72         FW3_FLAG_DROP          = 8,
  73         FW3_FLAG_NOTRACK       = 9,
  74         FW3_FLAG_HELPER        = 10,
  75         FW3_FLAG_MARK          = 11,
  76         FW3_FLAG_DNAT          = 12,
  77         FW3_FLAG_SNAT          = 13,
  78         FW3_FLAG_MASQUERADE    = 14,
  79         FW3_FLAG_SRC_ACCEPT    = 15,
  80         FW3_FLAG_SRC_REJECT    = 16,
  81         FW3_FLAG_SRC_DROP      = 17,
  82         FW3_FLAG_CUSTOM_CHAINS = 18,
  83         FW3_FLAG_SYN_FLOOD     = 19,
  84         FW3_FLAG_MTU_FIX       = 20,
  85         FW3_FLAG_DROP_INVALID  = 21,
  86         FW3_FLAG_HOTPLUG       = 22,
  87
  88         __FW3_FLAG_MAX
  89 };
  90
  91 extern const char *fw3_flag_names[__FW3_FLAG_MAX];
  92
  93
  94 enum fw3_limit_unit
  95 {
  96         FW3_LIMIT_UNIT_SECOND = 0,
  97         FW3_LIMIT_UNIT_MINUTE = 1,
  98         FW3_LIMIT_UNIT_HOUR   = 2,
  99         FW3_LIMIT_UNIT_DAY    = 3,
 100
 101         __FW3_LIMIT_UNIT_MAX
 102 };
 103
 104 extern const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX];
 105
 106
 107 enum fw3_ipset_method
 108 {
 109         FW3_IPSET_METHOD_UNSPEC = 0,
 110         FW3_IPSET_METHOD_BITMAP = 1,
 111         FW3_IPSET_METHOD_HASH   = 2,
 112         FW3_IPSET_METHOD_LIST   = 3,
 113
 114         __FW3_IPSET_METHOD_MAX
 115 };
 116
 117 enum fw3_ipset_type
 118 {
 119         FW3_IPSET_TYPE_UNSPEC = 0,
 120         FW3_IPSET_TYPE_IP     = 1,
 121         FW3_IPSET_TYPE_PORT   = 2,
 122         FW3_IPSET_TYPE_MAC    = 3,
 123         FW3_IPSET_TYPE_NET    = 4,
 124         FW3_IPSET_TYPE_SET    = 5,
 125
 126         __FW3_IPSET_TYPE_MAX
 127 };
 128
 129 extern const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX];
 130 extern const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX];
 131
 132
 133 enum fw3_include_type
 134 {
 135         FW3_INC_TYPE_SCRIPT   = 0,
 136         FW3_INC_TYPE_RESTORE  = 1,
 137 };
 138
 139 enum fw3_reflection_source
 140 {
 141         FW3_REFLECTION_INTERNAL = 0,
 142         FW3_REFLECTION_EXTERNAL = 1,
 143 };
 144
 145 struct fw3_ipset_datatype
 146 {
 147         struct list_head list;
 148         enum fw3_ipset_type type;
 149         const char *dir;
 150 };
 151
 152 struct fw3_setmatch
 153 {
 154         bool set;
 155         bool invert;
 156         char name[32];
 157         const char *dir[3];
 158         struct fw3_ipset *ptr;
 159 };
 160
 161 struct fw3_device
 162 {
 163         struct list_head list;
 164
 165         bool set;
 166         bool any;
 167         bool invert;
 168         char name[32];
 169         char network[32];
 170 };
 171
 172 struct fw3_address
 173 {
 174         struct list_head list;
 175
 176         bool set;
 177         bool range;
 178         bool invert;
 179         bool resolved;
 180         enum fw3_family family;
 181         union {
 182                 struct in_addr v4;
 183                 struct in6_addr v6;
 184                 struct ether_addr mac;
 185         } address;
 186         union {
 187                 struct in_addr v4;
 188                 struct in6_addr v6;
 189                 struct ether_addr mac;
 190         } mask;
 191 };
 192
 193 struct fw3_mac
 194 {
 195         struct list_head list;
 196
 197         bool set;
 198         bool invert;
 199         struct ether_addr mac;
 200 };
 201
 202 struct fw3_protocol
 203 {
 204         struct list_head list;
 205
 206         bool any;
 207         bool invert;
 208         uint32_t protocol;
 209 };
 210
 211 struct fw3_port
 212 {
 213         struct list_head list;
 214
 215         bool set;
 216         bool invert;
 217         uint16_t port_min;
 218         uint16_t port_max;
 219 };
 220
 221 struct fw3_icmptype
 222 {
 223         struct list_head list;
 224
 225         bool invert;
 226         enum fw3_family family;
 227         uint8_t type;
 228         uint8_t code_min;
 229         uint8_t code_max;
 230         uint8_t type6;
 231         uint8_t code6_min;
 232         uint8_t code6_max;
 233 };
 234
 235 struct fw3_limit
 236 {
 237         bool invert;
 238         int rate;
 239         int burst;
 240         enum fw3_limit_unit unit;
 241 };
 242
 243 struct fw3_time
 244 {
 245         bool utc;
 246         struct tm datestart;
 247         struct tm datestop;
 248         uint32_t timestart;
 249         uint32_t timestop;
 250         uint32_t monthdays; /* bit 0 is invert + 1 .. 31 */
 251         uint8_t weekdays;   /* bit 0 is invert + 1 .. 7 */
 252 };
 253
 254 struct fw3_mark
 255 {
 256         bool set;
 257         bool invert;
 258         uint32_t mark;
 259         uint32_t mask;
 260 };
 261
 262 struct fw3_cthelpermatch
 263 {
 264         struct list_head list;
 265
 266         bool set;
 267         bool invert;
 268         char name[32];
 269         struct fw3_cthelper *ptr;
 270 };
 271
 272 struct fw3_defaults
 273 {
 274         enum fw3_flag policy_input;
 275         enum fw3_flag policy_output;
 276         enum fw3_flag policy_forward;
 277
 278         bool drop_invalid;
 279
 280         bool syn_flood;
 281         struct fw3_limit syn_flood_rate;
 282
 283         bool tcp_syncookies;
 284         int tcp_ecn;
 285         bool tcp_window_scaling;
 286
 287         bool accept_redirects;
 288         bool accept_source_route;
 289
 290         bool custom_chains;
 291         bool auto_helper;
 292         bool flow_offloading;
 293
 294         bool disable_ipv6;
 295
 296         uint32_t flags[2];
 297 };
 298
 299 struct fw3_zone
 300 {
 301         struct list_head list;
 302
 303         bool enabled;
 304         const char *name;
 305
 306         enum fw3_family family;
 307
 308         enum fw3_flag policy_input;
 309         enum fw3_flag policy_output;
 310         enum fw3_flag policy_forward;
 311
 312         struct list_head networks;
 313         struct list_head devices;
 314         struct list_head subnets;
 315
 316         const char *extra_src;
 317         const char *extra_dest;
 318
 319         bool masq;
 320         bool masq_allow_invalid;
 321         struct list_head masq_src;
 322         struct list_head masq_dest;
 323
 324         bool mtu_fix;
 325
 326         struct list_head cthelpers;
 327
 328         int log;
 329         struct fw3_limit log_limit;
 330
 331         bool custom_chains;
 332         bool auto_helper;
 333
 334         uint32_t flags[2];
 335
 336         struct list_head old_addrs;
 337 };
 338
 339 struct fw3_rule
 340 {
 341         struct list_head list;
 342
 343         bool enabled;
 344         const char *name;
 345
 346         enum fw3_family family;
 347
 348         struct fw3_zone *_src;
 349         struct fw3_zone *_dest;
 350
 351         const char *device;
 352         bool direction_out;
 353
 354         struct fw3_device src;
 355         struct fw3_device dest;
 356         struct fw3_setmatch ipset;
 357         struct fw3_cthelpermatch helper;
 358
 359         struct list_head proto;
 360
 361         struct list_head ip_src;
 362         struct list_head mac_src;
 363         struct list_head port_src;
 364
 365         struct list_head ip_dest;
 366         struct list_head port_dest;
 367
 368         struct list_head icmp_type;
 369
 370         struct fw3_limit limit;
 371         struct fw3_time time;
 372         struct fw3_mark mark;
 373
 374         enum fw3_flag target;
 375         struct fw3_mark set_mark;
 376         struct fw3_mark set_xmark;
 377         struct fw3_cthelpermatch set_helper;
 378
 379         const char *extra;
 380 };
 381
 382 struct fw3_redirect
 383 {
 384         struct list_head list;
 385
 386         bool enabled;
 387         const char *name;
 388
 389         enum fw3_family family;
 390
 391         struct fw3_zone *_src;
 392         struct fw3_zone *_dest;
 393
 394         struct fw3_device src;
 395         struct fw3_device dest;
 396         struct fw3_setmatch ipset;
 397         struct fw3_cthelpermatch helper;
 398
 399         struct list_head proto;
 400
 401         struct fw3_address ip_src;
 402         struct list_head mac_src;
 403         struct fw3_port port_src;
 404
 405         struct fw3_address ip_dest;
 406         struct fw3_port port_dest;
 407
 408         struct fw3_address ip_redir;
 409         struct fw3_port port_redir;
 410
 411         struct fw3_limit limit;
 412         struct fw3_time time;
 413         struct fw3_mark mark;
 414
 415         enum fw3_flag target;
 416
 417         const char *extra;
 418
 419         bool local;
 420         bool reflection;
 421         enum fw3_reflection_source reflection_src;
 422 };
 423
 424 struct fw3_snat
 425 {
 426         struct list_head list;
 427
 428         bool enabled;
 429         const char *name;
 430
 431         enum fw3_family family;
 432
 433         struct fw3_zone *_src;
 434
 435         struct fw3_device src;
 436         struct fw3_setmatch ipset;
 437         struct fw3_cthelpermatch helper;
 438         const char *device;
 439
 440         struct list_head proto;
 441
 442         struct fw3_address ip_src;
 443         struct fw3_port port_src;
 444
 445         struct fw3_address ip_dest;
 446         struct fw3_port port_dest;
 447
 448         struct fw3_address ip_snat;
 449         struct fw3_port port_snat;
 450
 451         struct fw3_limit limit;
 452         struct fw3_time time;
 453         struct fw3_mark mark;
 454         bool connlimit_ports;
 455
 456         enum fw3_flag target;
 457
 458         const char *extra;
 459 };
 460
 461 struct fw3_forward
 462 {
 463         struct list_head list;
 464
 465         bool enabled;
 466         const char *name;
 467
 468         enum fw3_family family;
 469
 470         struct fw3_zone *_src;
 471         struct fw3_zone *_dest;
 472
 473         struct fw3_device src;
 474         struct fw3_device dest;
 475 };
 476
 477 struct fw3_ipset
 478 {
 479         struct list_head list;
 480
 481         bool enabled;
 482         const char *name;
 483         enum fw3_family family;
 484
 485         enum fw3_ipset_method method;
 486         struct list_head datatypes;
 487
 488         struct fw3_address iprange;
 489         struct fw3_port portrange;
 490
 491         int netmask;
 492         int maxelem;
 493         int hashsize;
 494
 495         int timeout;
 496
 497         const char *external;
 498
 499         struct list_head entries;
 500         const char *loadfile;
 501
 502         uint32_t flags[2];
 503 };
 504
 505 struct fw3_include
 506 {
 507         struct list_head list;
 508
 509         bool enabled;
 510         const char *name;
 511         enum fw3_family family;
 512
 513         const char *path;
 514         enum fw3_include_type type;
 515
 516         bool reload;
 517 };
 518
 519 struct fw3_cthelper
 520 {
 521         struct list_head list;
 522
 523         bool enabled;
 524         const char *name;
 525         const char *module;
 526         const char *description;
 527         enum fw3_family family;
 528         struct fw3_protocol proto;
 529         struct fw3_port port;
 530 };
 531
 532 struct fw3_setentry
 533 {
 534         struct list_head list;
 535         const char *value;
 536 };
 537
 538 struct fw3_state
 539 {
 540         struct uci_context *uci;
 541         struct fw3_defaults defaults;
 542         struct list_head zones;
 543         struct list_head rules;
 544         struct list_head redirects;
 545         struct list_head snats;
 546         struct list_head forwards;
 547         struct list_head ipsets;
 548         struct list_head includes;
 549         struct list_head cthelpers;
 550
 551         bool disable_ipsets;
 552         bool statefile;
 553 };
 554
 555 struct fw3_chain_spec {
 556         int family;
 557         int table;
 558         int flag;
 559         const char *format;
 560 };
 561
 562
 563 struct fw3_option
 564 {
 565         const char *name;
 566         bool (*parse)(void *, const char *, bool);
 567         uintptr_t offset;
 568         size_t elem_size;
 569 };
 570
 571 #define FW3_OPT(name, parse, structure, member) \
 572         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member) }
 573
 574 #define FW3_LIST(name, parse, structure, member) \
 575         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member), \
 576           sizeof(struct fw3_##structure) }
 577
 578 bool fw3_parse_bool(void *ptr, const char *val, bool is_list);
 579 bool fw3_parse_int(void *ptr, const char *val, bool is_list);
 580 bool fw3_parse_string(void *ptr, const char *val, bool is_list);
 581 bool fw3_parse_target(void *ptr, const char *val, bool is_list);
 582 bool fw3_parse_limit(void *ptr, const char *val, bool is_list);
 583 bool fw3_parse_device(void *ptr, const char *val, bool is_list);
 584 bool fw3_parse_address(void *ptr, const char *val, bool is_list);
 585 bool fw3_parse_network(void *ptr, const char *val, bool is_list);
 586 bool fw3_parse_mac(void *ptr, const char *val, bool is_list);
 587 bool fw3_parse_port(void *ptr, const char *val, bool is_list);
 588 bool fw3_parse_family(void *ptr, const char *val, bool is_list);
 589 bool fw3_parse_icmptype(void *ptr, const char *val, bool is_list);
 590 bool fw3_parse_protocol(void *ptr, const char *val, bool is_list);
 591
 592 bool fw3_parse_ipset_method(void *ptr, const char *val, bool is_list);
 593 bool fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list);
 594
 595 bool fw3_parse_include_type(void *ptr, const char *val, bool is_list);
 596 bool fw3_parse_reflection_source(void *ptr, const char *val, bool is_list);
 597
 598 bool fw3_parse_date(void *ptr, const char *val, bool is_list);
 599 bool fw3_parse_time(void *ptr, const char *val, bool is_list);
 600 bool fw3_parse_weekdays(void *ptr, const char *val, bool is_list);
 601 bool fw3_parse_monthdays(void *ptr, const char *val, bool is_list);
 602 bool fw3_parse_mark(void *ptr, const char *val, bool is_list);
 603 bool fw3_parse_setmatch(void *ptr, const char *val, bool is_list);
 604 bool fw3_parse_direction(void *ptr, const char *val, bool is_list);
 605 bool fw3_parse_cthelper(void *ptr, const char *val, bool is_list);
 606 bool fw3_parse_setentry(void *ptr, const char *val, bool is_list);
 607
 608 bool fw3_parse_options(void *s, const struct fw3_option *opts,
 609                        struct uci_section *section);
 610 bool fw3_parse_blob_options(void *s, const struct fw3_option *opts,
 611                             struct blob_attr *a, const char *name);
 612
 613 const char * fw3_address_to_string(struct fw3_address *address,
 614                                    bool allow_invert, bool as_cidr);
 615
 616 #endif