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_DNAT          = 10,
  72         FW3_FLAG_SNAT          = 11,
  73         FW3_FLAG_SRC_ACCEPT    = 12,
  74         FW3_FLAG_SRC_REJECT    = 13,
  75         FW3_FLAG_SRC_DROP      = 14,
  76         FW3_FLAG_CUSTOM_CHAINS = 15,
  77         FW3_FLAG_SYN_FLOOD     = 16,
  78         FW3_FLAG_MTU_FIX       = 17,
  79         FW3_FLAG_DROP_INVALID  = 18,
  80         FW3_FLAG_HOTPLUG       = 19,
  81
  82         __FW3_FLAG_MAX
  83 };
  84
  85 extern const char *fw3_flag_names[__FW3_FLAG_MAX];
  86
  87
  88 enum fw3_limit_unit
  89 {
  90         FW3_LIMIT_UNIT_SECOND = 0,
  91         FW3_LIMIT_UNIT_MINUTE = 1,
  92         FW3_LIMIT_UNIT_HOUR   = 2,
  93         FW3_LIMIT_UNIT_DAY    = 3,
  94 };
  95
  96 enum fw3_ipset_method
  97 {
  98         FW3_IPSET_METHOD_UNSPEC = 0,
  99         FW3_IPSET_METHOD_BITMAP = 1,
 100         FW3_IPSET_METHOD_HASH   = 2,
 101         FW3_IPSET_METHOD_LIST   = 3,
 102 };
 103
 104 enum fw3_ipset_type
 105 {
 106         FW3_IPSET_TYPE_UNSPEC = 0,
 107         FW3_IPSET_TYPE_IP     = 1,
 108         FW3_IPSET_TYPE_PORT   = 2,
 109         FW3_IPSET_TYPE_MAC    = 3,
 110         FW3_IPSET_TYPE_NET    = 4,
 111         FW3_IPSET_TYPE_SET    = 5,
 112 };
 113
 114 enum fw3_include_type
 115 {
 116         FW3_INC_TYPE_SCRIPT   = 0,
 117         FW3_INC_TYPE_RESTORE  = 1,
 118 };
 119
 120 enum fw3_reflection_source
 121 {
 122         FW3_REFLECTION_INTERNAL = 0,
 123         FW3_REFLECTION_EXTERNAL = 1,
 124 };
 125
 126 struct fw3_ipset_datatype
 127 {
 128         struct list_head list;
 129         enum fw3_ipset_type type;
 130         bool dest;
 131 };
 132
 133 struct fw3_device
 134 {
 135         struct list_head list;
 136
 137         bool set;
 138         bool any;
 139         bool invert;
 140         char name[32];
 141         struct fw3_device *network;
 142 };
 143
 144 struct fw3_address
 145 {
 146         struct list_head list;
 147
 148         bool set;
 149         bool range;
 150         bool invert;
 151         enum fw3_family family;
 152         int mask;
 153         union {
 154                 struct in_addr v4;
 155                 struct in6_addr v6;
 156                 struct ether_addr mac;
 157         } address;
 158         union {
 159                 struct in_addr v4;
 160                 struct in6_addr v6;
 161                 struct ether_addr mac;
 162         } address2;
 163 };
 164
 165 struct fw3_mac
 166 {
 167         struct list_head list;
 168
 169         bool set;
 170         bool invert;
 171         struct ether_addr mac;
 172 };
 173
 174 struct fw3_protocol
 175 {
 176         struct list_head list;
 177
 178         bool any;
 179         bool invert;
 180         uint32_t protocol;
 181 };
 182
 183 struct fw3_port
 184 {
 185         struct list_head list;
 186
 187         bool set;
 188         bool invert;
 189         uint16_t port_min;
 190         uint16_t port_max;
 191 };
 192
 193 struct fw3_icmptype
 194 {
 195         struct list_head list;
 196
 197         bool invert;
 198         enum fw3_family family;
 199         uint8_t type;
 200         uint8_t code_min;
 201         uint8_t code_max;
 202         uint8_t type6;
 203         uint8_t code6_min;
 204         uint8_t code6_max;
 205 };
 206
 207 struct fw3_limit
 208 {
 209         bool invert;
 210         int rate;
 211         int burst;
 212         enum fw3_limit_unit unit;
 213 };
 214
 215 struct fw3_time
 216 {
 217         bool utc;
 218         struct tm datestart;
 219         struct tm datestop;
 220         uint32_t timestart;
 221         uint32_t timestop;
 222         uint32_t monthdays; /* bit 0 is invert + 1 .. 31 */
 223         uint8_t weekdays;   /* bit 0 is invert + 1 .. 7 */
 224 };
 225
 226 struct fw3_defaults
 227 {
 228         enum fw3_flag policy_input;
 229         enum fw3_flag policy_output;
 230         enum fw3_flag policy_forward;
 231
 232         bool drop_invalid;
 233
 234         bool syn_flood;
 235         struct fw3_limit syn_flood_rate;
 236
 237         bool tcp_syncookies;
 238         bool tcp_ecn;
 239         bool tcp_window_scaling;
 240
 241         bool accept_redirects;
 242         bool accept_source_route;
 243
 244         bool custom_chains;
 245
 246         bool disable_ipv6;
 247
 248         uint32_t flags[2];
 249 };
 250
 251 struct fw3_zone
 252 {
 253         struct list_head list;
 254         struct list_head running_list;
 255
 256         bool enabled;
 257         const char *name;
 258
 259         enum fw3_family family;
 260
 261         enum fw3_flag policy_input;
 262         enum fw3_flag policy_output;
 263         enum fw3_flag policy_forward;
 264
 265         struct list_head networks;
 266         struct list_head devices;
 267         struct list_head subnets;
 268
 269         struct list_head running_networks;
 270         struct list_head running_devices;
 271
 272         const char *extra_src;
 273         const char *extra_dest;
 274
 275         bool masq;
 276         struct list_head masq_src;
 277         struct list_head masq_dest;
 278
 279         bool conntrack;
 280         bool mtu_fix;
 281
 282         bool log;
 283         struct fw3_limit log_limit;
 284
 285         bool custom_chains;
 286
 287         uint32_t flags[2];
 288 };
 289
 290 struct fw3_rule
 291 {
 292         struct list_head list;
 293
 294         bool enabled;
 295         const char *name;
 296
 297         enum fw3_family family;
 298
 299         struct fw3_zone *_src;
 300         struct fw3_zone *_dest;
 301
 302         struct fw3_device src;
 303         struct fw3_device dest;
 304
 305         struct fw3_ipset *_ipset;
 306         struct fw3_device ipset;
 307
 308         struct list_head proto;
 309
 310         struct list_head ip_src;
 311         struct list_head mac_src;
 312         struct list_head port_src;
 313
 314         struct list_head ip_dest;
 315         struct list_head port_dest;
 316
 317         struct list_head icmp_type;
 318
 319         struct fw3_limit limit;
 320         struct fw3_time time;
 321
 322         enum fw3_flag target;
 323
 324         const char *extra;
 325 };
 326
 327 struct fw3_redirect
 328 {
 329         struct list_head list;
 330
 331         bool enabled;
 332         const char *name;
 333
 334         enum fw3_family family;
 335
 336         struct fw3_zone *_src;
 337         struct fw3_zone *_dest;
 338
 339         struct fw3_device src;
 340         struct fw3_device dest;
 341
 342         struct fw3_ipset *_ipset;
 343         struct fw3_device ipset;
 344
 345         struct list_head proto;
 346
 347         struct fw3_address ip_src;
 348         struct list_head mac_src;
 349         struct fw3_port port_src;
 350
 351         struct fw3_address ip_dest;
 352         struct fw3_port port_dest;
 353
 354         struct fw3_address ip_redir;
 355         struct fw3_port port_redir;
 356
 357         struct fw3_time time;
 358
 359         enum fw3_flag target;
 360
 361         const char *extra;
 362
 363         bool reflection;
 364         enum fw3_reflection_source reflection_src;
 365 };
 366
 367 struct fw3_forward
 368 {
 369         struct list_head list;
 370
 371         bool enabled;
 372         const char *name;
 373
 374         enum fw3_family family;
 375
 376         struct fw3_zone *_src;
 377         struct fw3_zone *_dest;
 378
 379         struct fw3_device src;
 380         struct fw3_device dest;
 381 };
 382
 383 struct fw3_ipset
 384 {
 385         struct list_head list;
 386         struct list_head running_list;
 387
 388         bool enabled;
 389         const char *name;
 390         enum fw3_family family;
 391
 392         enum fw3_ipset_method method;
 393         struct list_head datatypes;
 394
 395         struct fw3_address iprange;
 396         struct fw3_port portrange;
 397
 398         int netmask;
 399         int maxelem;
 400         int hashsize;
 401
 402         int timeout;
 403
 404         const char *external;
 405
 406         uint32_t flags[2];
 407 };
 408
 409 struct fw3_include
 410 {
 411         struct list_head list;
 412         struct list_head running_list;
 413
 414         bool enabled;
 415         const char *name;
 416         enum fw3_family family;
 417
 418         const char *path;
 419         enum fw3_include_type type;
 420
 421         bool reload;
 422 };
 423
 424 struct fw3_state
 425 {
 426         struct uci_context *uci;
 427         struct fw3_defaults defaults;
 428         struct list_head zones;
 429         struct list_head rules;
 430         struct list_head redirects;
 431         struct list_head forwards;
 432         struct list_head ipsets;
 433         struct list_head includes;
 434
 435         struct list_head running_zones;
 436         struct list_head running_ipsets;
 437
 438         bool disable_ipsets;
 439         bool statefile;
 440 };
 441
 442
 443 struct fw3_option
 444 {
 445         const char *name;
 446         bool (*parse)(void *, const char *, bool);
 447         uintptr_t offset;
 448         size_t elem_size;
 449 };
 450
 451 #define FW3_OPT(name, parse, structure, member) \
 452         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member) }
 453
 454 #define FW3_LIST(name, parse, structure, member) \
 455         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member), \
 456           sizeof(struct fw3_##structure) }
 457
 458 bool fw3_parse_bool(void *ptr, const char *val, bool is_list);
 459 bool fw3_parse_int(void *ptr, const char *val, bool is_list);
 460 bool fw3_parse_string(void *ptr, const char *val, bool is_list);
 461 bool fw3_parse_target(void *ptr, const char *val, bool is_list);
 462 bool fw3_parse_limit(void *ptr, const char *val, bool is_list);
 463 bool fw3_parse_device(void *ptr, const char *val, bool is_list);
 464 bool fw3_parse_address(void *ptr, const char *val, bool is_list);
 465 bool fw3_parse_network(void *ptr, const char *val, bool is_list);
 466 bool fw3_parse_mac(void *ptr, const char *val, bool is_list);
 467 bool fw3_parse_port(void *ptr, const char *val, bool is_list);
 468 bool fw3_parse_family(void *ptr, const char *val, bool is_list);
 469 bool fw3_parse_icmptype(void *ptr, const char *val, bool is_list);
 470 bool fw3_parse_protocol(void *ptr, const char *val, bool is_list);
 471
 472 bool fw3_parse_ipset_method(void *ptr, const char *val, bool is_list);
 473 bool fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list);
 474
 475 bool fw3_parse_include_type(void *ptr, const char *val, bool is_list);
 476 bool fw3_parse_reflection_source(void *ptr, const char *val, bool is_list);
 477
 478 bool fw3_parse_date(void *ptr, const char *val, bool is_list);
 479 bool fw3_parse_time(void *ptr, const char *val, bool is_list);
 480 bool fw3_parse_weekdays(void *ptr, const char *val, bool is_list);
 481 bool fw3_parse_monthdays(void *ptr, const char *val, bool is_list);
 482
 483 void fw3_parse_options(void *s, const struct fw3_option *opts,
 484                        struct uci_section *section);
 485
 486 void fw3_format_in_out(struct fw3_device *in, struct fw3_device *out);
 487 void fw3_format_src_dest(struct fw3_address *src, struct fw3_address *dest);
 488 void fw3_format_sport_dport(struct fw3_port *sp, struct fw3_port *dp);
 489 void fw3_format_mac(struct fw3_mac *mac);
 490 void fw3_format_protocol(struct fw3_protocol *proto, enum fw3_family family);
 491 void fw3_format_icmptype(struct fw3_icmptype *icmp, enum fw3_family family);
 492 void fw3_format_limit(struct fw3_limit *limit);
 493 void fw3_format_ipset(struct fw3_ipset *ipset, bool invert);
 494 void fw3_format_time(struct fw3_time *time);
 495
 496 void __fw3_format_comment(const char *comment, ...);
 497 #define fw3_format_comment(...) __fw3_format_comment(__VA_ARGS__, NULL)
 498
 499 void fw3_format_extra(const char *extra);
 500
 501 #endif