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_target
  65 {
  66         FW3_TARGET_UNSPEC        = 0,
  67         FW3_TARGET_ACCEPT        = 6,
  68         FW3_TARGET_REJECT        = 7,
  69         FW3_TARGET_DROP          = 8,
  70         FW3_TARGET_NOTRACK       = 9,
  71         FW3_TARGET_DNAT          = 10,
  72         FW3_TARGET_SNAT          = 11,
  73         FW3_TARGET_CUSTOM_CNS_V4 = 12,
  74         FW3_TARGET_CUSTOM_CNS_V6 = 13,
  75 };
  76
  77 enum fw3_default
  78 {
  79         FW3_DEFAULT_UNSPEC        = 0,
  80         FW3_DEFAULT_CUSTOM_CHAINS = 14,
  81         FW3_DEFAULT_SYN_FLOOD     = 15,
  82         FW3_DEFAULT_MTU_FIX       = 16,
  83         FW3_DEFAULT_DROP_INVALID  = 17,
  84 };
  85
  86 extern const char *fw3_flag_names[FW3_DEFAULT_DROP_INVALID + 1];
  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
  97 enum fw3_ipset_method
  98 {
  99         FW3_IPSET_METHOD_UNSPEC = 0,
 100         FW3_IPSET_METHOD_BITMAP = 1,
 101         FW3_IPSET_METHOD_HASH   = 2,
 102         FW3_IPSET_METHOD_LIST   = 3,
 103 };
 104
 105 enum fw3_ipset_type
 106 {
 107         FW3_IPSET_TYPE_UNSPEC = 0,
 108         FW3_IPSET_TYPE_IP     = 1,
 109         FW3_IPSET_TYPE_PORT   = 2,
 110         FW3_IPSET_TYPE_MAC    = 3,
 111         FW3_IPSET_TYPE_NET    = 4,
 112         FW3_IPSET_TYPE_SET    = 5,
 113 };
 114
 115 enum fw3_include_type
 116 {
 117         FW3_INC_TYPE_SCRIPT   = 0,
 118         FW3_INC_TYPE_RESTORE  = 1,
 119 };
 120
 121 struct fw3_ipset_datatype
 122 {
 123         struct list_head list;
 124         enum fw3_ipset_type type;
 125         bool dest;
 126 };
 127
 128 struct fw3_device
 129 {
 130         struct list_head list;
 131
 132         bool set;
 133         bool any;
 134         bool invert;
 135         char name[32];
 136 };
 137
 138 struct fw3_address
 139 {
 140         struct list_head list;
 141
 142         bool set;
 143         bool range;
 144         bool invert;
 145         enum fw3_family family;
 146         int mask;
 147         union {
 148                 struct in_addr v4;
 149                 struct in6_addr v6;
 150                 struct ether_addr mac;
 151         } address;
 152         union {
 153                 struct in_addr v4;
 154                 struct in6_addr v6;
 155                 struct ether_addr mac;
 156         } address2;
 157 };
 158
 159 struct fw3_mac
 160 {
 161         struct list_head list;
 162
 163         bool set;
 164         bool invert;
 165         struct ether_addr mac;
 166 };
 167
 168 struct fw3_protocol
 169 {
 170         struct list_head list;
 171
 172         bool any;
 173         bool invert;
 174         uint32_t protocol;
 175 };
 176
 177 struct fw3_port
 178 {
 179         struct list_head list;
 180
 181         bool set;
 182         bool invert;
 183         uint16_t port_min;
 184         uint16_t port_max;
 185 };
 186
 187 struct fw3_icmptype
 188 {
 189         struct list_head list;
 190
 191         bool invert;
 192         enum fw3_family family;
 193         uint8_t type;
 194         uint8_t code_min;
 195         uint8_t code_max;
 196         uint8_t type6;
 197         uint8_t code6_min;
 198         uint8_t code6_max;
 199 };
 200
 201 struct fw3_limit
 202 {
 203         bool invert;
 204         int rate;
 205         int burst;
 206         enum fw3_limit_unit unit;
 207 };
 208
 209 struct fw3_time
 210 {
 211         bool utc;
 212         struct tm datestart;
 213         struct tm datestop;
 214         uint32_t timestart;
 215         uint32_t timestop;
 216         uint32_t monthdays; /* bit 0 is invert + 1 .. 31 */
 217         uint8_t weekdays;   /* bit 0 is invert + 1 .. 7 */
 218 };
 219
 220 struct fw3_defaults
 221 {
 222         enum fw3_target policy_input;
 223         enum fw3_target policy_output;
 224         enum fw3_target policy_forward;
 225
 226         bool drop_invalid;
 227
 228         bool syn_flood;
 229         struct fw3_limit syn_flood_rate;
 230
 231         bool tcp_syncookies;
 232         bool tcp_ecn;
 233         bool tcp_window_scaling;
 234
 235         bool accept_redirects;
 236         bool accept_source_route;
 237
 238         bool custom_chains;
 239
 240         bool disable_ipv6;
 241
 242         uint32_t flags;
 243         uint32_t running_flags;
 244 };
 245
 246 struct fw3_zone
 247 {
 248         struct list_head list;
 249         struct list_head running_list;
 250
 251         bool enabled;
 252         const char *name;
 253
 254         enum fw3_family family;
 255
 256         enum fw3_target policy_input;
 257         enum fw3_target policy_output;
 258         enum fw3_target policy_forward;
 259
 260         struct list_head networks;
 261         struct list_head devices;
 262         struct list_head subnets;
 263
 264         const char *extra_src;
 265         const char *extra_dest;
 266
 267         bool masq;
 268         struct list_head masq_src;
 269         struct list_head masq_dest;
 270
 271         bool conntrack;
 272         bool mtu_fix;
 273
 274         bool log;
 275         struct fw3_limit log_limit;
 276
 277         bool custom_chains;
 278
 279         uint32_t src_flags;
 280         uint32_t dst_flags;
 281
 282         uint32_t running_src_flags;
 283         uint32_t running_dst_flags;
 284 };
 285
 286 struct fw3_rule
 287 {
 288         struct list_head list;
 289
 290         bool enabled;
 291         const char *name;
 292
 293         enum fw3_family family;
 294
 295         struct fw3_zone *_src;
 296         struct fw3_zone *_dest;
 297
 298         struct fw3_device src;
 299         struct fw3_device dest;
 300
 301         struct fw3_ipset *_ipset;
 302         struct fw3_device ipset;
 303
 304         struct list_head proto;
 305
 306         struct list_head ip_src;
 307         struct list_head mac_src;
 308         struct list_head port_src;
 309
 310         struct list_head ip_dest;
 311         struct list_head port_dest;
 312
 313         struct list_head icmp_type;
 314
 315         struct fw3_limit limit;
 316         struct fw3_time time;
 317
 318         enum fw3_target target;
 319
 320         const char *extra;
 321 };
 322
 323 struct fw3_redirect
 324 {
 325         struct list_head list;
 326
 327         bool enabled;
 328         const char *name;
 329
 330         enum fw3_family family;
 331
 332         struct fw3_zone *_src;
 333         struct fw3_zone *_dest;
 334
 335         struct fw3_device src;
 336         struct fw3_device dest;
 337
 338         struct fw3_ipset *_ipset;
 339         struct fw3_device ipset;
 340
 341         struct list_head proto;
 342
 343         struct fw3_address ip_src;
 344         struct list_head mac_src;
 345         struct fw3_port port_src;
 346
 347         struct fw3_address ip_dest;
 348         struct fw3_port port_dest;
 349
 350         struct fw3_address ip_redir;
 351         struct fw3_port port_redir;
 352
 353         struct fw3_time time;
 354
 355         enum fw3_target target;
 356
 357         const char *extra;
 358
 359         bool reflection;
 360 };
 361
 362 struct fw3_forward
 363 {
 364         struct list_head list;
 365
 366         bool enabled;
 367         const char *name;
 368
 369         enum fw3_family family;
 370
 371         struct fw3_zone *_src;
 372         struct fw3_zone *_dest;
 373
 374         struct fw3_device src;
 375         struct fw3_device dest;
 376 };
 377
 378 struct fw3_ipset
 379 {
 380         struct list_head list;
 381         struct list_head running_list;
 382
 383         bool enabled;
 384         const char *name;
 385         enum fw3_family family;
 386
 387         enum fw3_ipset_method method;
 388         struct list_head datatypes;
 389
 390         struct fw3_address iprange;
 391         struct fw3_port portrange;
 392
 393         int netmask;
 394         int maxelem;
 395         int hashsize;
 396
 397         int timeout;
 398
 399         const char *external;
 400
 401         uint32_t flags;
 402         uint32_t running_flags;
 403 };
 404
 405 struct fw3_include
 406 {
 407         struct list_head list;
 408         struct list_head running_list;
 409
 410         bool enabled;
 411         const char *name;
 412         enum fw3_family family;
 413
 414         const char *path;
 415         enum fw3_include_type type;
 416 };
 417
 418 struct fw3_state
 419 {
 420         struct uci_context *uci;
 421         struct fw3_defaults defaults;
 422         struct list_head zones;
 423         struct list_head rules;
 424         struct list_head redirects;
 425         struct list_head forwards;
 426         struct list_head ipsets;
 427         struct list_head includes;
 428
 429         struct list_head running_zones;
 430         struct list_head running_ipsets;
 431
 432         bool disable_ipsets;
 433         bool statefile;
 434 };
 435
 436
 437 struct fw3_option
 438 {
 439         const char *name;
 440         bool (*parse)(void *, const char *);
 441         uintptr_t offset;
 442         size_t elem_size;
 443 };
 444
 445 #define FW3_OPT(name, parse, structure, member) \
 446         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member) }
 447
 448 #define FW3_LIST(name, parse, structure, member) \
 449         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member), \
 450           sizeof(struct fw3_##structure) }
 451
 452
 453 bool fw3_parse_bool(void *ptr, const char *val);
 454 bool fw3_parse_int(void *ptr, const char *val);
 455 bool fw3_parse_string(void *ptr, const char *val);
 456 bool fw3_parse_target(void *ptr, const char *val);
 457 bool fw3_parse_limit(void *ptr, const char *val);
 458 bool fw3_parse_device(void *ptr, const char *val);
 459 bool fw3_parse_address(void *ptr, const char *val);
 460 bool fw3_parse_mac(void *ptr, const char *val);
 461 bool fw3_parse_port(void *ptr, const char *val);
 462 bool fw3_parse_family(void *ptr, const char *val);
 463 bool fw3_parse_icmptype(void *ptr, const char *val);
 464 bool fw3_parse_protocol(void *ptr, const char *val);
 465
 466 bool fw3_parse_ipset_method(void *ptr, const char *val);
 467 bool fw3_parse_ipset_datatype(void *ptr, const char *val);
 468
 469 bool fw3_parse_include_type(void *ptr, const char *val);
 470
 471 bool fw3_parse_date(void *ptr, const char *val);
 472 bool fw3_parse_time(void *ptr, const char *val);
 473 bool fw3_parse_weekdays(void *ptr, const char *val);
 474 bool fw3_parse_monthdays(void *ptr, const char *val);
 475
 476 void fw3_parse_options(void *s, const struct fw3_option *opts,
 477                        struct uci_section *section);
 478
 479 void fw3_format_in_out(struct fw3_device *in, struct fw3_device *out);
 480 void fw3_format_src_dest(struct fw3_address *src, struct fw3_address *dest);
 481 void fw3_format_sport_dport(struct fw3_port *sp, struct fw3_port *dp);
 482 void fw3_format_mac(struct fw3_mac *mac);
 483 void fw3_format_protocol(struct fw3_protocol *proto, enum fw3_family family);
 484 void fw3_format_icmptype(struct fw3_icmptype *icmp, enum fw3_family family);
 485 void fw3_format_limit(struct fw3_limit *limit);
 486 void fw3_format_ipset(struct fw3_ipset *ipset, bool invert);
 487 void fw3_format_time(struct fw3_time *time);
 488
 489 void __fw3_format_comment(const char *comment, ...);
 490 #define fw3_format_comment(...) __fw3_format_comment(__VA_ARGS__, NULL)
 491
 492 void fw3_format_extra(const char *extra);
 493
 494 #endif