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