options.h

   1 /*
   2  * firewall3 - 3rd OpenWrt UCI firewall implementation
   3  *
   4  *   Copyright (C) 2013-2014 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 #include <libubox/blobmsg.h>
  45
  46 #include "icmp_codes.h"
  47 #include "utils.h"
  48
  49
  50 enum fw3_table
  51 {
  52         FW3_TABLE_FILTER = 0,
  53         FW3_TABLE_NAT    = 1,
  54         FW3_TABLE_MANGLE = 2,
  55         FW3_TABLE_RAW    = 3,
  56 };
  57
  58 enum fw3_family
  59 {
  60         FW3_FAMILY_ANY = 0,
  61         FW3_FAMILY_V4  = 4,
  62         FW3_FAMILY_V6  = 5,
  63 };
  64
  65 enum fw3_flag
  66 {
  67         FW3_FLAG_UNSPEC        = 0,
  68         FW3_FLAG_ACCEPT        = 6,
  69         FW3_FLAG_REJECT        = 7,
  70         FW3_FLAG_DROP          = 8,
  71         FW3_FLAG_NOTRACK       = 9,
  72         FW3_FLAG_MARK          = 10,
  73         FW3_FLAG_DNAT          = 11,
  74         FW3_FLAG_SNAT          = 12,
  75         FW3_FLAG_MASQUERADE    = 13,
  76         FW3_FLAG_SRC_ACCEPT    = 14,
  77         FW3_FLAG_SRC_REJECT    = 15,
  78         FW3_FLAG_SRC_DROP      = 16,
  79         FW3_FLAG_CUSTOM_CHAINS = 17,
  80         FW3_FLAG_SYN_FLOOD     = 18,
  81         FW3_FLAG_MTU_FIX       = 19,
  82         FW3_FLAG_DROP_INVALID  = 20,
  83         FW3_FLAG_HOTPLUG       = 21,
  84
  85         __FW3_FLAG_MAX
  86 };
  87
  88 extern const char *fw3_flag_names[__FW3_FLAG_MAX];
  89
  90
  91 enum fw3_limit_unit
  92 {
  93         FW3_LIMIT_UNIT_SECOND = 0,
  94         FW3_LIMIT_UNIT_MINUTE = 1,
  95         FW3_LIMIT_UNIT_HOUR   = 2,
  96         FW3_LIMIT_UNIT_DAY    = 3,
  97
  98         __FW3_LIMIT_UNIT_MAX
  99 };
 100
 101 extern const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX];
 102
 103
 104 enum fw3_ipset_method
 105 {
 106         FW3_IPSET_METHOD_UNSPEC = 0,
 107         FW3_IPSET_METHOD_BITMAP = 1,
 108         FW3_IPSET_METHOD_HASH   = 2,
 109         FW3_IPSET_METHOD_LIST   = 3,
 110
 111         __FW3_IPSET_METHOD_MAX
 112 };
 113
 114 enum fw3_ipset_type
 115 {
 116         FW3_IPSET_TYPE_UNSPEC = 0,
 117         FW3_IPSET_TYPE_IP     = 1,
 118         FW3_IPSET_TYPE_PORT   = 2,
 119         FW3_IPSET_TYPE_MAC    = 3,
 120         FW3_IPSET_TYPE_NET    = 4,
 121         FW3_IPSET_TYPE_SET    = 5,
 122
 123         __FW3_IPSET_TYPE_MAX
 124 };
 125
 126 extern const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX];
 127 extern const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX];
 128
 129
 130 enum fw3_include_type
 131 {
 132         FW3_INC_TYPE_SCRIPT   = 0,
 133         FW3_INC_TYPE_RESTORE  = 1,
 134 };
 135
 136 enum fw3_reflection_source
 137 {
 138         FW3_REFLECTION_INTERNAL = 0,
 139         FW3_REFLECTION_EXTERNAL = 1,
 140 };
 141
 142 struct fw3_ipset_datatype
 143 {
 144         struct list_head list;
 145         enum fw3_ipset_type type;
 146         const char *dir;
 147 };
 148
 149 struct fw3_setmatch
 150 {
 151         bool set;
 152         bool invert;
 153         char name[32];
 154         const char *dir[3];
 155         struct fw3_ipset *ptr;
 156 };
 157
 158 struct fw3_device
 159 {
 160         struct list_head list;
 161
 162         bool set;
 163         bool any;
 164         bool invert;
 165         char name[32];
 166         char network[32];
 167 };
 168
 169 struct fw3_address
 170 {
 171         struct list_head list;
 172
 173         bool set;
 174         bool range;
 175         bool invert;
 176         bool resolved;
 177         enum fw3_family family;
 178         union {
 179                 struct in_addr v4;
 180                 struct in6_addr v6;
 181                 struct ether_addr mac;
 182         } address;
 183         union {
 184                 struct in_addr v4;
 185                 struct in6_addr v6;
 186                 struct ether_addr mac;
 187         } mask;
 188 };
 189
 190 struct fw3_mac
 191 {
 192         struct list_head list;
 193
 194         bool set;
 195         bool invert;
 196         struct ether_addr mac;
 197 };
 198
 199 struct fw3_protocol
 200 {
 201         struct list_head list;
 202
 203         bool any;
 204         bool invert;
 205         uint32_t protocol;
 206 };
 207
 208 struct fw3_port
 209 {
 210         struct list_head list;
 211
 212         bool set;
 213         bool invert;
 214         uint16_t port_min;
 215         uint16_t port_max;
 216 };
 217
 218 struct fw3_icmptype
 219 {
 220         struct list_head list;
 221
 222         bool invert;
 223         enum fw3_family family;
 224         uint8_t type;
 225         uint8_t code_min;
 226         uint8_t code_max;
 227         uint8_t type6;
 228         uint8_t code6_min;
 229         uint8_t code6_max;
 230 };
 231
 232 struct fw3_limit
 233 {
 234         bool invert;
 235         int rate;
 236         int burst;
 237         enum fw3_limit_unit unit;
 238 };
 239
 240 struct fw3_time
 241 {
 242         bool utc;
 243         struct tm datestart;
 244         struct tm datestop;
 245         uint32_t timestart;
 246         uint32_t timestop;
 247         uint32_t monthdays; /* bit 0 is invert + 1 .. 31 */
 248         uint8_t weekdays;   /* bit 0 is invert + 1 .. 7 */
 249 };
 250
 251 struct fw3_mark
 252 {
 253         bool set;
 254         bool invert;
 255         uint32_t mark;
 256         uint32_t mask;
 257 };
 258
 259 struct fw3_defaults
 260 {
 261         enum fw3_flag policy_input;
 262         enum fw3_flag policy_output;
 263         enum fw3_flag policy_forward;
 264
 265         bool drop_invalid;
 266
 267         bool syn_flood;
 268         struct fw3_limit syn_flood_rate;
 269
 270         bool tcp_syncookies;
 271         int tcp_ecn;
 272         bool tcp_window_scaling;
 273
 274         bool accept_redirects;
 275         bool accept_source_route;
 276
 277         bool custom_chains;
 278
 279         bool disable_ipv6;
 280
 281         uint32_t flags[2];
 282 };
 283
 284 struct fw3_zone
 285 {
 286         struct list_head list;
 287
 288         bool enabled;
 289         const char *name;
 290
 291         enum fw3_family family;
 292
 293         enum fw3_flag policy_input;
 294         enum fw3_flag policy_output;
 295         enum fw3_flag policy_forward;
 296
 297         struct list_head networks;
 298         struct list_head devices;
 299         struct list_head subnets;
 300
 301         const char *extra_src;
 302         const char *extra_dest;
 303
 304         bool masq;
 305         struct list_head masq_src;
 306         struct list_head masq_dest;
 307
 308         bool conntrack;
 309         bool mtu_fix;
 310
 311         bool log;
 312         struct fw3_limit log_limit;
 313
 314         bool custom_chains;
 315
 316         uint32_t flags[2];
 317
 318         struct list_head old_addrs;
 319 };
 320
 321 struct fw3_rule
 322 {
 323         struct list_head list;
 324
 325         bool enabled;
 326         const char *name;
 327
 328         enum fw3_family family;
 329
 330         struct fw3_zone *_src;
 331         struct fw3_zone *_dest;
 332
 333         const char *device;
 334         bool direction_out;
 335
 336         struct fw3_device src;
 337         struct fw3_device dest;
 338         struct fw3_setmatch ipset;
 339
 340         struct list_head proto;
 341
 342         struct list_head ip_src;
 343         struct list_head mac_src;
 344         struct list_head port_src;
 345
 346         struct list_head ip_dest;
 347         struct list_head port_dest;
 348
 349         struct list_head icmp_type;
 350
 351         struct fw3_limit limit;
 352         struct fw3_time time;
 353         struct fw3_mark mark;
 354
 355         enum fw3_flag target;
 356         struct fw3_mark set_mark;
 357         struct fw3_mark set_xmark;
 358
 359         const char *extra;
 360 };
 361
 362 struct fw3_redirect
 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         struct fw3_setmatch ipset;
 377
 378         struct list_head proto;
 379
 380         struct fw3_address ip_src;
 381         struct list_head mac_src;
 382         struct fw3_port port_src;
 383
 384         struct fw3_address ip_dest;
 385         struct fw3_port port_dest;
 386
 387         struct fw3_address ip_redir;
 388         struct fw3_port port_redir;
 389
 390         struct fw3_limit limit;
 391         struct fw3_time time;
 392         struct fw3_mark mark;
 393
 394         enum fw3_flag target;
 395
 396         const char *extra;
 397
 398         bool local;
 399         bool reflection;
 400         enum fw3_reflection_source reflection_src;
 401 };
 402
 403 struct fw3_snat
 404 {
 405         struct list_head list;
 406
 407         bool enabled;
 408         const char *name;
 409
 410         enum fw3_family family;
 411
 412         struct fw3_zone *_src;
 413
 414         struct fw3_device src;
 415         struct fw3_setmatch ipset;
 416         const char *device;
 417
 418         struct list_head proto;
 419
 420         struct fw3_address ip_src;
 421         struct fw3_port port_src;
 422
 423         struct fw3_address ip_dest;
 424         struct fw3_port port_dest;
 425
 426         struct fw3_address ip_snat;
 427         struct fw3_port port_snat;
 428
 429         struct fw3_limit limit;
 430         struct fw3_time time;
 431         struct fw3_mark mark;
 432         bool connlimit_ports;
 433
 434         enum fw3_flag target;
 435
 436         const char *extra;
 437 };
 438
 439 struct fw3_forward
 440 {
 441         struct list_head list;
 442
 443         bool enabled;
 444         const char *name;
 445
 446         enum fw3_family family;
 447
 448         struct fw3_zone *_src;
 449         struct fw3_zone *_dest;
 450
 451         struct fw3_device src;
 452         struct fw3_device dest;
 453 };
 454
 455 struct fw3_ipset
 456 {
 457         struct list_head list;
 458
 459         bool enabled;
 460         const char *name;
 461         enum fw3_family family;
 462
 463         enum fw3_ipset_method method;
 464         struct list_head datatypes;
 465
 466         struct fw3_address iprange;
 467         struct fw3_port portrange;
 468
 469         int netmask;
 470         int maxelem;
 471         int hashsize;
 472
 473         int timeout;
 474
 475         const char *external;
 476
 477         uint32_t flags[2];
 478 };
 479
 480 struct fw3_include
 481 {
 482         struct list_head list;
 483
 484         bool enabled;
 485         const char *name;
 486         enum fw3_family family;
 487
 488         const char *path;
 489         enum fw3_include_type type;
 490
 491         bool reload;
 492 };
 493
 494 struct fw3_state
 495 {
 496         struct uci_context *uci;
 497         struct fw3_defaults defaults;
 498         struct list_head zones;
 499         struct list_head rules;
 500         struct list_head redirects;
 501         struct list_head snats;
 502         struct list_head forwards;
 503         struct list_head ipsets;
 504         struct list_head includes;
 505
 506         bool disable_ipsets;
 507         bool statefile;
 508 };
 509
 510 struct fw3_chain_spec {
 511         int family;
 512         int table;
 513         int flag;
 514         const char *format;
 515 };
 516
 517
 518 struct fw3_option
 519 {
 520         const char *name;
 521         bool (*parse)(void *, const char *, bool);
 522         uintptr_t offset;
 523         size_t elem_size;
 524 };
 525
 526 #define FW3_OPT(name, parse, structure, member) \
 527         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member) }
 528
 529 #define FW3_LIST(name, parse, structure, member) \
 530         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member), \
 531           sizeof(struct fw3_##structure) }
 532
 533 bool fw3_parse_bool(void *ptr, const char *val, bool is_list);
 534 bool fw3_parse_int(void *ptr, const char *val, bool is_list);
 535 bool fw3_parse_string(void *ptr, const char *val, bool is_list);
 536 bool fw3_parse_target(void *ptr, const char *val, bool is_list);
 537 bool fw3_parse_limit(void *ptr, const char *val, bool is_list);
 538 bool fw3_parse_device(void *ptr, const char *val, bool is_list);
 539 bool fw3_parse_address(void *ptr, const char *val, bool is_list);
 540 bool fw3_parse_network(void *ptr, const char *val, bool is_list);
 541 bool fw3_parse_mac(void *ptr, const char *val, bool is_list);
 542 bool fw3_parse_port(void *ptr, const char *val, bool is_list);
 543 bool fw3_parse_family(void *ptr, const char *val, bool is_list);
 544 bool fw3_parse_icmptype(void *ptr, const char *val, bool is_list);
 545 bool fw3_parse_protocol(void *ptr, const char *val, bool is_list);
 546
 547 bool fw3_parse_ipset_method(void *ptr, const char *val, bool is_list);
 548 bool fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list);
 549
 550 bool fw3_parse_include_type(void *ptr, const char *val, bool is_list);
 551 bool fw3_parse_reflection_source(void *ptr, const char *val, bool is_list);
 552
 553 bool fw3_parse_date(void *ptr, const char *val, bool is_list);
 554 bool fw3_parse_time(void *ptr, const char *val, bool is_list);
 555 bool fw3_parse_weekdays(void *ptr, const char *val, bool is_list);
 556 bool fw3_parse_monthdays(void *ptr, const char *val, bool is_list);
 557 bool fw3_parse_mark(void *ptr, const char *val, bool is_list);
 558 bool fw3_parse_setmatch(void *ptr, const char *val, bool is_list);
 559 bool fw3_parse_direction(void *ptr, const char *val, bool is_list);
 560
 561 bool fw3_parse_options(void *s, const struct fw3_option *opts,
 562                        struct uci_section *section);
 563 bool fw3_parse_blob_options(void *s, const struct fw3_option *opts,
 564                        struct blob_attr *a);
 565
 566 const char * fw3_address_to_string(struct fw3_address *address,
 567                                    bool allow_invert, bool as_cidr);
 568
 569 #endif