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
  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_MASQUERADE    = 13,
  75         FW3_FLAG_SRC_ACCEPT    = 14,
  76         FW3_FLAG_SRC_REJECT    = 15,
  77         FW3_FLAG_SRC_DROP      = 16,
  78         FW3_FLAG_CUSTOM_CHAINS = 17,
  79         FW3_FLAG_SYN_FLOOD     = 18,
  80         FW3_FLAG_MTU_FIX       = 19,
  81         FW3_FLAG_DROP_INVALID  = 20,
  82         FW3_FLAG_HOTPLUG       = 21,
  83
  84         __FW3_FLAG_MAX
  85 };
  86
  87 extern const char *fw3_flag_names[__FW3_FLAG_MAX];
  88
  89
  90 enum fw3_limit_unit
  91 {
  92         FW3_LIMIT_UNIT_SECOND = 0,
  93         FW3_LIMIT_UNIT_MINUTE = 1,
  94         FW3_LIMIT_UNIT_HOUR   = 2,
  95         FW3_LIMIT_UNIT_DAY    = 3,
  96
  97         __FW3_LIMIT_UNIT_MAX
  98 };
  99
 100 extern const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX];
 101
 102
 103 enum fw3_ipset_method
 104 {
 105         FW3_IPSET_METHOD_UNSPEC = 0,
 106         FW3_IPSET_METHOD_BITMAP = 1,
 107         FW3_IPSET_METHOD_HASH   = 2,
 108         FW3_IPSET_METHOD_LIST   = 3,
 109
 110         __FW3_IPSET_METHOD_MAX
 111 };
 112
 113 enum fw3_ipset_type
 114 {
 115         FW3_IPSET_TYPE_UNSPEC = 0,
 116         FW3_IPSET_TYPE_IP     = 1,
 117         FW3_IPSET_TYPE_PORT   = 2,
 118         FW3_IPSET_TYPE_MAC    = 3,
 119         FW3_IPSET_TYPE_NET    = 4,
 120         FW3_IPSET_TYPE_SET    = 5,
 121
 122         __FW3_IPSET_TYPE_MAX
 123 };
 124
 125 extern const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX];
 126 extern const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX];
 127
 128
 129 enum fw3_include_type
 130 {
 131         FW3_INC_TYPE_SCRIPT   = 0,
 132         FW3_INC_TYPE_RESTORE  = 1,
 133 };
 134
 135 enum fw3_reflection_source
 136 {
 137         FW3_REFLECTION_INTERNAL = 0,
 138         FW3_REFLECTION_EXTERNAL = 1,
 139 };
 140
 141 struct fw3_ipset_datatype
 142 {
 143         struct list_head list;
 144         enum fw3_ipset_type type;
 145         const char *dir;
 146 };
 147
 148 struct fw3_setmatch
 149 {
 150         bool set;
 151         bool invert;
 152         char name[32];
 153         const char *dir[3];
 154         struct fw3_ipset *ptr;
 155 };
 156
 157 struct fw3_device
 158 {
 159         struct list_head list;
 160
 161         bool set;
 162         bool any;
 163         bool invert;
 164         char name[32];
 165         char network[32];
 166 };
 167
 168 struct fw3_address
 169 {
 170         struct list_head list;
 171
 172         bool set;
 173         bool range;
 174         bool invert;
 175         bool resolved;
 176         enum fw3_family family;
 177         int mask;
 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         } address2;
 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
 319 struct fw3_rule
 320 {
 321         struct list_head list;
 322
 323         bool enabled;
 324         const char *name;
 325
 326         enum fw3_family family;
 327
 328         struct fw3_zone *_src;
 329         struct fw3_zone *_dest;
 330
 331         struct fw3_device src;
 332         struct fw3_device dest;
 333         struct fw3_setmatch ipset;
 334
 335         struct list_head proto;
 336
 337         struct list_head ip_src;
 338         struct list_head mac_src;
 339         struct list_head port_src;
 340
 341         struct list_head ip_dest;
 342         struct list_head port_dest;
 343
 344         struct list_head icmp_type;
 345
 346         struct fw3_limit limit;
 347         struct fw3_time time;
 348         struct fw3_mark mark;
 349
 350         enum fw3_flag target;
 351         struct fw3_mark set_mark;
 352         struct fw3_mark set_xmark;
 353
 354         const char *extra;
 355 };
 356
 357 struct fw3_redirect
 358 {
 359         struct list_head list;
 360
 361         bool enabled;
 362         const char *name;
 363
 364         enum fw3_family family;
 365
 366         struct fw3_zone *_src;
 367         struct fw3_zone *_dest;
 368
 369         struct fw3_device src;
 370         struct fw3_device dest;
 371         struct fw3_setmatch ipset;
 372
 373         struct list_head proto;
 374
 375         struct fw3_address ip_src;
 376         struct list_head mac_src;
 377         struct fw3_port port_src;
 378
 379         struct fw3_address ip_dest;
 380         struct fw3_port port_dest;
 381
 382         struct fw3_address ip_redir;
 383         struct fw3_port port_redir;
 384
 385         struct fw3_limit limit;
 386         struct fw3_time time;
 387         struct fw3_mark mark;
 388
 389         enum fw3_flag target;
 390
 391         const char *extra;
 392
 393         bool local;
 394         bool reflection;
 395         enum fw3_reflection_source reflection_src;
 396 };
 397
 398 struct fw3_snat
 399 {
 400         struct list_head list;
 401
 402         bool enabled;
 403         const char *name;
 404
 405         enum fw3_family family;
 406
 407         struct fw3_zone *_src;
 408
 409         struct fw3_device src;
 410         struct fw3_setmatch ipset;
 411
 412         struct list_head proto;
 413
 414         struct fw3_address ip_src;
 415         struct fw3_port port_src;
 416
 417         struct fw3_address ip_dest;
 418         struct fw3_port port_dest;
 419
 420         struct fw3_address ip_snat;
 421         struct fw3_port port_snat;
 422
 423         struct fw3_limit limit;
 424         struct fw3_time time;
 425         struct fw3_mark mark;
 426         bool connlimit_ports;
 427
 428         enum fw3_flag target;
 429
 430         const char *extra;
 431 };
 432
 433 struct fw3_forward
 434 {
 435         struct list_head list;
 436
 437         bool enabled;
 438         const char *name;
 439
 440         enum fw3_family family;
 441
 442         struct fw3_zone *_src;
 443         struct fw3_zone *_dest;
 444
 445         struct fw3_device src;
 446         struct fw3_device dest;
 447 };
 448
 449 struct fw3_ipset
 450 {
 451         struct list_head list;
 452
 453         bool enabled;
 454         const char *name;
 455         enum fw3_family family;
 456
 457         enum fw3_ipset_method method;
 458         struct list_head datatypes;
 459
 460         struct fw3_address iprange;
 461         struct fw3_port portrange;
 462
 463         int netmask;
 464         int maxelem;
 465         int hashsize;
 466
 467         int timeout;
 468
 469         const char *external;
 470
 471         uint32_t flags[2];
 472 };
 473
 474 struct fw3_include
 475 {
 476         struct list_head list;
 477
 478         bool enabled;
 479         const char *name;
 480         enum fw3_family family;
 481
 482         const char *path;
 483         enum fw3_include_type type;
 484
 485         bool reload;
 486 };
 487
 488 struct fw3_state
 489 {
 490         struct uci_context *uci;
 491         struct fw3_defaults defaults;
 492         struct list_head zones;
 493         struct list_head rules;
 494         struct list_head redirects;
 495         struct list_head snats;
 496         struct list_head forwards;
 497         struct list_head ipsets;
 498         struct list_head includes;
 499
 500         bool disable_ipsets;
 501         bool statefile;
 502 };
 503
 504 struct fw3_chain_spec {
 505         int family;
 506         int table;
 507         int flag;
 508         const char *format;
 509 };
 510
 511
 512 struct fw3_option
 513 {
 514         const char *name;
 515         bool (*parse)(void *, const char *, bool);
 516         uintptr_t offset;
 517         size_t elem_size;
 518 };
 519
 520 #define FW3_OPT(name, parse, structure, member) \
 521         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member) }
 522
 523 #define FW3_LIST(name, parse, structure, member) \
 524         { name, fw3_parse_##parse, offsetof(struct fw3_##structure, member), \
 525           sizeof(struct fw3_##structure) }
 526
 527 bool fw3_parse_bool(void *ptr, const char *val, bool is_list);
 528 bool fw3_parse_int(void *ptr, const char *val, bool is_list);
 529 bool fw3_parse_string(void *ptr, const char *val, bool is_list);
 530 bool fw3_parse_target(void *ptr, const char *val, bool is_list);
 531 bool fw3_parse_limit(void *ptr, const char *val, bool is_list);
 532 bool fw3_parse_device(void *ptr, const char *val, bool is_list);
 533 bool fw3_parse_address(void *ptr, const char *val, bool is_list);
 534 bool fw3_parse_network(void *ptr, const char *val, bool is_list);
 535 bool fw3_parse_mac(void *ptr, const char *val, bool is_list);
 536 bool fw3_parse_port(void *ptr, const char *val, bool is_list);
 537 bool fw3_parse_family(void *ptr, const char *val, bool is_list);
 538 bool fw3_parse_icmptype(void *ptr, const char *val, bool is_list);
 539 bool fw3_parse_protocol(void *ptr, const char *val, bool is_list);
 540
 541 bool fw3_parse_ipset_method(void *ptr, const char *val, bool is_list);
 542 bool fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list);
 543
 544 bool fw3_parse_include_type(void *ptr, const char *val, bool is_list);
 545 bool fw3_parse_reflection_source(void *ptr, const char *val, bool is_list);
 546
 547 bool fw3_parse_date(void *ptr, const char *val, bool is_list);
 548 bool fw3_parse_time(void *ptr, const char *val, bool is_list);
 549 bool fw3_parse_weekdays(void *ptr, const char *val, bool is_list);
 550 bool fw3_parse_monthdays(void *ptr, const char *val, bool is_list);
 551 bool fw3_parse_mark(void *ptr, const char *val, bool is_list);
 552 bool fw3_parse_setmatch(void *ptr, const char *val, bool is_list);
 553
 554 bool fw3_parse_options(void *s, const struct fw3_option *opts,
 555                        struct uci_section *section);
 556
 557 const char * fw3_address_to_string(struct fw3_address *address,
 558                                    bool allow_invert);
 559
 560 #endif