options.h

   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 #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 #include <netinet/in.h>
  36 #include <netinet/ether.h>
  37
  38 #include <time.h>
  39
  40 #include <uci.h>
  41
  42 #include <libubox/list.h>
  43 #include <libubox/utils.h>
  44
  45 #include "icmp_codes.h"
  46 #include "utils.h"
  47
  48
  49 enum fw3_table
  50 {
  51         FW3_TABLE_FILTER = 0,
  52         FW3_TABLE_NAT    = 1,
  53         FW3_TABLE_MANGLE = 2,
  54         FW3_TABLE_RAW    = 3,
  55 };
  56
  57 enum fw3_family
  58 {
  59         FW3_FAMILY_ANY = 0,
  60         FW3_FAMILY_V4  = 4,
  61         FW3_FAMILY_V6  = 5,
  62 };
  63
  64 enum fw3_flag
  65 {
  66         FW3_FLAG_UNSPEC        = 0,
  67         FW3_FLAG_ACCEPT        = 6,
  68         FW3_FLAG_REJECT        = 7,
  69         FW3_FLAG_DROP          = 8,
  70         FW3_FLAG_NOTRACK       = 9,
  71         FW3_FLAG_MARK          = 10,
  72         FW3_FLAG_DNAT          = 11,
  73         FW3_FLAG_SNAT          = 12,
  74         FW3_FLAG_SRC_ACCEPT    = 13,
  75         FW3_FLAG_SRC_REJECT    = 14,
  76         FW3_FLAG_SRC_DROP      = 15,
  77         FW3_FLAG_CUSTOM_CHAINS = 16,
  78         FW3_FLAG_SYN_FLOOD     = 17,
  79         FW3_FLAG_MTU_FIX       = 18,
  80         FW3_FLAG_DROP_INVALID  = 19,
  81         FW3_FLAG_HOTPLUG       = 20,
  82
  83         __FW3_FLAG_MAX
  84 };
  85
  86 extern const char *fw3_flag_names[__FW3_FLAG_MAX];
  87
  88
  89 enum fw3_limit_unit
  90 {
  91         FW3_LIMIT_UNIT_SECOND = 0,
  92         FW3_LIMIT_UNIT_MINUTE = 1,
  93         FW3_LIMIT_UNIT_HOUR   = 2,
  94         FW3_LIMIT_UNIT_DAY    = 3,
  95
  96         __FW3_LIMIT_UNIT_MAX
  97 };
  98
  99 extern const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX];
 100
 101
 102 enum fw3_ipset_method
 103 {
 104         FW3_IPSET_METHOD_UNSPEC = 0,
 105         FW3_IPSET_METHOD_BITMAP = 1,
 106         FW3_IPSET_METHOD_HASH   = 2,
 107         FW3_IPSET_METHOD_LIST   = 3,
 108
 109         __FW3_IPSET_METHOD_MAX
 110 };
 111
 112 enum fw3_ipset_type
 113 {
 114         FW3_IPSET_TYPE_UNSPEC = 0,
 115         FW3_IPSET_TYPE_IP     = 1,
 116         FW3_IPSET_TYPE_PORT   = 2,
 117         FW3_IPSET_TYPE_MAC    = 3,
 118         FW3_IPSET_TYPE_NET    = 4,
 119         FW3_IPSET_TYPE_SET    = 5,
 120
 121         __FW3_IPSET_TYPE_MAX
 122 };
 123
 124 extern const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX];
 125 extern const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX];
 126
 127
 128 enum fw3_include_type
 129 {
 130         FW3_INC_TYPE_SCRIPT   = 0,
 131         FW3_INC_TYPE_RESTORE  = 1,
 132 };
 133
 134 enum fw3_reflection_source
 135 {
 136         FW3_REFLECTION_INTERNAL = 0,
 137         FW3_REFLECTION_EXTERNAL = 1,
 138 };
 139
 140 struct fw3_ipset_datatype
 141 {
 142         struct list_head list;
 143         enum fw3_ipset_type type;
 144         const char *dir;
 145 };
 146
 147 struct fw3_setmatch
 148 {
 149         bool set;
 150         bool invert;
 151         char name[32];
 152         const char *dir[3];
 153         struct fw3_ipset *ptr;
 154 };
 155
 156 struct fw3_device
 157 {
 158         struct list_head list;
 159
 160         bool set;
 161         bool any;
 162         bool invert;
 163         char name[32];
 164         char network[32];
 165 };
 166
 167 struct fw3_address
 168 {
 169         struct list_head list;
 170
 171         bool set;
 172         bool range;
 173         bool invert;
 174         bool resolved;
 175         enum fw3_family family;
 176         int mask;
 177         union {
 178                 struct in_addr v4;
 179                 struct in6_addr v6;
 180                 struct ether_addr mac;
 181         } address;
 182         union {
 183                 struct in_addr v4;
 184                 struct in6_addr v6;
 185                 struct ether_addr mac;
 186         } address2;
 187 };
 188
 189 struct fw3_mac
 190 {
 191         struct list_head list;
 192
 193         bool set;
 194         bool invert;
 195         struct ether_addr mac;
 196 };
 197
 198 struct fw3_protocol
 199 {
 200         struct list_head list;
 201
 202         bool any;
 203         bool invert;
 204         uint32_t protocol;
 205 };
 206
 207 struct fw3_port
 208 {
 209         struct list_head list;
 210
 211         bool set;
 212         bool invert;
 213         uint16_t port_min;
 214         uint16_t port_max;
 215 };
 216
 217 struct fw3_icmptype
 218 {
 219         struct list_head list;
 220
 221         bool invert;
 222         enum fw3_family family;
 223         uint8_t type;
 224         uint8_t code_min;
 225         uint8_t code_max;
 226         uint8_t type6;
 227         uint8_t code6_min;
 228         uint8_t code6_max;
 229 };
 230
 231 struct fw3_limit
 232 {
 233         bool invert;
 234         int rate;
 235         int burst;
 236         enum fw3_limit_unit unit;
 237 };
 238
 239 struct fw3_time
 240 {
 241         bool utc;
 242         struct tm datestart;
 243         struct tm datestop;
 244         uint32_t timestart;
 245         uint32_t timestop;
 246         uint32_t monthdays; /* bit 0 is invert + 1 .. 31 */
 247         uint8_t weekdays;   /* bit 0 is invert + 1 .. 7 */
 248 };
 249
 250 struct fw3_mark
 251 {
 252         bool set;
 253         bool invert;
 254         uint32_t mark;
 255         uint32_t mask;
 256 };
 257
 258 struct fw3_defaults
 259 {
 260         enum fw3_flag policy_input;
 261         enum fw3_flag policy_output;
 262         enum fw3_flag policy_forward;
 263
 264         bool drop_invalid;
 265
 266         bool syn_flood;
 267         struct fw3_limit syn_flood_rate;
 268
 269         bool tcp_syncookies;
 270         bool tcp_ecn;
 271         bool tcp_window_scaling;
 272
 273         bool accept_redirects;
 274         bool accept_source_route;
 275
 276         bool custom_chains;
 277
 278         bool disable_ipv6;
 279
 280         uint32_t flags[2];
 281 };
 282
 283 struct fw3_zone
 284 {
 285         struct list_head list;
 286
 287         bool enabled;
 288         const char *name;
 289
 290         enum fw3_family family;
 291
 292         enum fw3_flag policy_input;
 293         enum fw3_flag policy_output;
 294         enum fw3_flag policy_forward;
 295
 296         struct list_head networks;
 297         struct list_head devices;
 298         struct list_head subnets;
 299
 300         const char *extra_src;
 301         const char *extra_dest;
 302
 303         bool masq;
 304         struct list_head masq_src;
 305         struct list_head masq_dest;
 306
 307         bool conntrack;
 308         bool mtu_fix;
 309
 310         bool log;
 311         struct fw3_limit log_limit;
 312
 313         bool custom_chains;
 314
 315         uint32_t flags[2];
 316 };
 317
 318 struct fw3_rule
 319 {
 320         struct list_head list;
 321
 322         bool enabled;
 323         const char *name;
 324
 325         enum fw3_family family;
 326
 327         struct fw3_zone *_src;
 328         struct fw3_zone *_dest;
 329
 330         struct fw3_device src;
 331         struct fw3_device dest;
 332         struct fw3_setmatch ipset;
 333
 334         struct list_head proto;
 335
 336         struct list_head ip_src;
 337         struct list_head mac_src;
 338         struct list_head port_src;
 339
 340         struct list_head ip_dest;
 341         struct list_head port_dest;
 342
 343         struct list_head icmp_type;
 344
 345         struct fw3_limit limit;
 346         struct fw3_time time;
 347         struct fw3_mark mark;
 348
 349         enum fw3_flag target;
 350         struct fw3_mark set_mark;
 351         struct fw3_mark set_xmark;
 352
 353         const char *extra;
 354 };
 355
 356 struct fw3_redirect
 357 {
 358         struct list_head list;
 359
 360         bool enabled;
 361         const char *name;
 362
 363         enum fw3_family family;
 364
 365         struct fw3_zone *_src;
 366         struct fw3_zone *_dest;
 367
 368         struct fw3_device src;
 369         struct fw3_device dest;
 370         struct fw3_setmatch ipset;
 371
 372         struct list_head proto;
 373
 374         struct fw3_address ip_src;
 375         struct list_head mac_src;
 376         struct fw3_port port_src;
 377
 378         struct fw3_address ip_dest;
 379         struct fw3_port port_dest;
 380
 381         struct fw3_address ip_redir;
 382         struct fw3_port port_redir;
 383
 384         struct fw3_limit limit;
 385         struct fw3_time time;
 386         struct fw3_mark mark;
 387
 388         enum fw3_flag target;
 389
 390         const char *extra;
 391
 392         bool local;
 393         bool reflection;
 394         enum fw3_reflection_source reflection_src;
 395 };
 396
 397 struct fw3_forward
 398 {
 399         struct list_head list;
 400
 401         bool enabled;
 402         const char *name;
 403
 404         enum fw3_family family;
 405
 406         struct fw3_zone *_src;
 407         struct fw3_zone *_dest;
 408
 409         struct fw3_device src;
 410         struct fw3_device dest;
 411 };
 412
 413 struct fw3_ipset
 414 {
 415         struct list_head list;
 416
 417         bool enabled;
 418         const char *name;
 419         enum fw3_family family;
 420
 421         enum fw3_ipset_method method;
 422         struct list_head datatypes;
 423
 424         struct fw3_address iprange;
 425         struct fw3_port portrange;
 426
 427         int netmask;
 428         int maxelem;
 429         int hashsize;
 430
 431         int timeout;
 432
 433         const char *external;
 434
 435         uint32_t flags[2];
 436 };
 437
 438 struct fw3_include
 439 {
 440         struct list_head list;
 441
 442         bool enabled;
 443         const char *name;
 444         enum fw3_family family;
 445
 446         const char *path;
 447         enum fw3_include_type type;
 448
 449         bool reload;
 450 };
 451
 452 struct fw3_state
 453 {
 454         struct uci_context *uci;
 455         struct fw3_defaults defaults;
 456         struct list_head zones;
 457         struct list_head rules;
 458         struct list_head redirects;
 459         struct list_head forwards;
 460         struct list_head ipsets;
 461         struct list_head includes;
 462
 463         bool disable_ipsets;
 464         bool statefile;
 465 };
 466
 467 struct fw3_chain_spec {
 468         int family;
 469         int table;
 470         int flag;
 471         const char *format;
 472 };
 473
 474
 475 struct fw3_option
 476 {
 477         const char *name;
 478         bool (*parse)(void *, const char *, bool);
 479         uintptr_t offset;
 480         size_t elem_size;
 481 };
 482
 483 #define FW3_OPT(name, parse, structure, member) \
 484         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member) }
 485
 486 #define FW3_LIST(name, parse, structure, member) \
 487         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member), \
 488           sizeof(struct fw3_##structure) }
 489
 490 bool fw3_parse_bool(void *ptr, const char *val, bool is_list);
 491 bool fw3_parse_int(void *ptr, const char *val, bool is_list);
 492 bool fw3_parse_string(void *ptr, const char *val, bool is_list);
 493 bool fw3_parse_target(void *ptr, const char *val, bool is_list);
 494 bool fw3_parse_limit(void *ptr, const char *val, bool is_list);
 495 bool fw3_parse_device(void *ptr, const char *val, bool is_list);
 496 bool fw3_parse_address(void *ptr, const char *val, bool is_list);
 497 bool fw3_parse_network(void *ptr, const char *val, bool is_list);
 498 bool fw3_parse_mac(void *ptr, const char *val, bool is_list);
 499 bool fw3_parse_port(void *ptr, const char *val, bool is_list);
 500 bool fw3_parse_family(void *ptr, const char *val, bool is_list);
 501 bool fw3_parse_icmptype(void *ptr, const char *val, bool is_list);
 502 bool fw3_parse_protocol(void *ptr, const char *val, bool is_list);
 503
 504 bool fw3_parse_ipset_method(void *ptr, const char *val, bool is_list);
 505 bool fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list);
 506
 507 bool fw3_parse_include_type(void *ptr, const char *val, bool is_list);
 508 bool fw3_parse_reflection_source(void *ptr, const char *val, bool is_list);
 509
 510 bool fw3_parse_date(void *ptr, const char *val, bool is_list);
 511 bool fw3_parse_time(void *ptr, const char *val, bool is_list);
 512 bool fw3_parse_weekdays(void *ptr, const char *val, bool is_list);
 513 bool fw3_parse_monthdays(void *ptr, const char *val, bool is_list);
 514 bool fw3_parse_mark(void *ptr, const char *val, bool is_list);
 515 bool fw3_parse_setmatch(void *ptr, const char *val, bool is_list);
 516
 517 void fw3_parse_options(void *s, const struct fw3_option *opts,
 518                        struct uci_section *section);
 519
 520 const char * fw3_address_to_string(struct fw3_address *address,
 521                                    bool allow_invert);
 522
 523 #endif