net/netfilter/xt_set.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
   3  *                         Patrick Schaaf <bof@bof.de>
   4  *                         Martin Josefsson <gandalf@wlug.westbo.se>
   5  * Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
   6  */
   7
   8 /* Kernel module which implements the set match and SET target
   9  * for netfilter/iptables.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/skbuff.h>
  14
  15 #include <linux/netfilter/x_tables.h>
  16 #include <linux/netfilter/ipset/ip_set.h>
  17 #include <linux/netfilter/ipset/ip_set_timeout.h>
  18 #include <uapi/linux/netfilter/xt_set.h>
  19
  20 MODULE_LICENSE("GPL");
  21 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
  22 MODULE_DESCRIPTION("Xtables: IP set match and target module");
  23 MODULE_ALIAS("xt_SET");
  24 MODULE_ALIAS("ipt_set");
  25 MODULE_ALIAS("ip6t_set");
  26 MODULE_ALIAS("ipt_SET");
  27 MODULE_ALIAS("ip6t_SET");
  28
  29 static inline int
  30 match_set(ip_set_id_t index, const struct sk_buff *skb,
  31           const struct xt_action_param *par,
  32           struct ip_set_adt_opt *opt, int inv)
  33 {
  34         if (ip_set_test(index, skb, par, opt))
  35                 inv = !inv;
  36         return inv;
  37 }
  38
  39 #define ADT_OPT(n, f, d, fs, cfs, t, p, b, po, bo)      \
  40 struct ip_set_adt_opt n = {                             \
  41         .family = f,                                    \
  42         .dim = d,                                       \
  43         .flags = fs,                                    \
  44         .cmdflags = cfs,                                \
  45         .ext.timeout = t,                               \
  46         .ext.packets = p,                               \
  47         .ext.bytes = b,                                 \
  48         .ext.packets_op = po,                           \
  49         .ext.bytes_op = bo,                             \
  50 }
  51
  52 /* Revision 0 interface: backward compatible with netfilter/iptables */
  53
  54 static bool
  55 set_match_v0(const struct sk_buff *skb, struct xt_action_param *par)
  56 {
  57         const struct xt_set_info_match_v0 *info = par->matchinfo;
  58
  59         ADT_OPT(opt, xt_family(par), info->match_set.u.compat.dim,
  60                 info->match_set.u.compat.flags, 0, UINT_MAX,
  61                 0, 0, 0, 0);
  62
  63         return match_set(info->match_set.index, skb, par, &opt,
  64                          info->match_set.u.compat.flags & IPSET_INV_MATCH);
  65 }
  66
  67 static void
  68 compat_flags(struct xt_set_info_v0 *info)
  69 {
  70         u_int8_t i;
  71
  72         /* Fill out compatibility data according to enum ip_set_kopt */
  73         info->u.compat.dim = IPSET_DIM_ZERO;
  74         if (info->u.flags[0] & IPSET_MATCH_INV)
  75                 info->u.compat.flags |= IPSET_INV_MATCH;
  76         for (i = 0; i < IPSET_DIM_MAX - 1 && info->u.flags[i]; i++) {
  77                 info->u.compat.dim++;
  78                 if (info->u.flags[i] & IPSET_SRC)
  79                         info->u.compat.flags |= (1 << info->u.compat.dim);
  80         }
  81 }
  82
  83 static int
  84 set_match_v0_checkentry(const struct xt_mtchk_param *par)
  85 {
  86         struct xt_set_info_match_v0 *info = par->matchinfo;
  87         ip_set_id_t index;
  88
  89         index = ip_set_nfnl_get_byindex(par->net, info->match_set.index);
  90
  91         if (index == IPSET_INVALID_ID) {
  92                 pr_info_ratelimited("Cannot find set identified by id %u to match\n",
  93                                     info->match_set.index);
  94                 return -ENOENT;
  95         }
  96         if (info->match_set.u.flags[IPSET_DIM_MAX - 1] != 0) {
  97                 pr_info_ratelimited("set match dimension is over the limit!\n");
  98                 ip_set_nfnl_put(par->net, info->match_set.index);
  99                 return -ERANGE;
 100         }
 101
 102         /* Fill out compatibility data */
 103         compat_flags(&info->match_set);
 104
 105         return 0;
 106 }
 107
 108 static void
 109 set_match_v0_destroy(const struct xt_mtdtor_param *par)
 110 {
 111         struct xt_set_info_match_v0 *info = par->matchinfo;
 112
 113         ip_set_nfnl_put(par->net, info->match_set.index);
 114 }
 115
 116 /* Revision 1 match */
 117
 118 static bool
 119 set_match_v1(const struct sk_buff *skb, struct xt_action_param *par)
 120 {
 121         const struct xt_set_info_match_v1 *info = par->matchinfo;
 122
 123         ADT_OPT(opt, xt_family(par), info->match_set.dim,
 124                 info->match_set.flags, 0, UINT_MAX,
 125                 0, 0, 0, 0);
 126
 127         if (opt.flags & IPSET_RETURN_NOMATCH)
 128                 opt.cmdflags |= IPSET_FLAG_RETURN_NOMATCH;
 129
 130         return match_set(info->match_set.index, skb, par, &opt,
 131                          info->match_set.flags & IPSET_INV_MATCH);
 132 }
 133
 134 static int
 135 set_match_v1_checkentry(const struct xt_mtchk_param *par)
 136 {
 137         struct xt_set_info_match_v1 *info = par->matchinfo;
 138         ip_set_id_t index;
 139
 140         index = ip_set_nfnl_get_byindex(par->net, info->match_set.index);
 141
 142         if (index == IPSET_INVALID_ID) {
 143                 pr_info_ratelimited("Cannot find set identified by id %u to match\n",
 144                                     info->match_set.index);
 145                 return -ENOENT;
 146         }
 147         if (info->match_set.dim > IPSET_DIM_MAX) {
 148                 pr_info_ratelimited("set match dimension is over the limit!\n");
 149                 ip_set_nfnl_put(par->net, info->match_set.index);
 150                 return -ERANGE;
 151         }
 152
 153         return 0;
 154 }
 155
 156 static void
 157 set_match_v1_destroy(const struct xt_mtdtor_param *par)
 158 {
 159         struct xt_set_info_match_v1 *info = par->matchinfo;
 160
 161         ip_set_nfnl_put(par->net, info->match_set.index);
 162 }
 163
 164 /* Revision 3 match */
 165
 166 static bool
 167 set_match_v3(const struct sk_buff *skb, struct xt_action_param *par)
 168 {
 169         const struct xt_set_info_match_v3 *info = par->matchinfo;
 170
 171         ADT_OPT(opt, xt_family(par), info->match_set.dim,
 172                 info->match_set.flags, info->flags, UINT_MAX,
 173                 info->packets.value, info->bytes.value,
 174                 info->packets.op, info->bytes.op);
 175
 176         if (info->packets.op != IPSET_COUNTER_NONE ||
 177             info->bytes.op != IPSET_COUNTER_NONE)
 178                 opt.cmdflags |= IPSET_FLAG_MATCH_COUNTERS;
 179
 180         return match_set(info->match_set.index, skb, par, &opt,
 181                          info->match_set.flags & IPSET_INV_MATCH);
 182 }
 183
 184 #define set_match_v3_checkentry set_match_v1_checkentry
 185 #define set_match_v3_destroy    set_match_v1_destroy
 186
 187 /* Revision 4 match */
 188
 189 static bool
 190 set_match_v4(const struct sk_buff *skb, struct xt_action_param *par)
 191 {
 192         const struct xt_set_info_match_v4 *info = par->matchinfo;
 193
 194         ADT_OPT(opt, xt_family(par), info->match_set.dim,
 195                 info->match_set.flags, info->flags, UINT_MAX,
 196                 info->packets.value, info->bytes.value,
 197                 info->packets.op, info->bytes.op);
 198
 199         if (info->packets.op != IPSET_COUNTER_NONE ||
 200             info->bytes.op != IPSET_COUNTER_NONE)
 201                 opt.cmdflags |= IPSET_FLAG_MATCH_COUNTERS;
 202
 203         return match_set(info->match_set.index, skb, par, &opt,
 204                          info->match_set.flags & IPSET_INV_MATCH);
 205 }
 206
 207 #define set_match_v4_checkentry set_match_v1_checkentry
 208 #define set_match_v4_destroy    set_match_v1_destroy
 209
 210 /* Revision 0 interface: backward compatible with netfilter/iptables */
 211
 212 static unsigned int
 213 set_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
 214 {
 215         const struct xt_set_info_target_v0 *info = par->targinfo;
 216
 217         ADT_OPT(add_opt, xt_family(par), info->add_set.u.compat.dim,
 218                 info->add_set.u.compat.flags, 0, UINT_MAX,
 219                 0, 0, 0, 0);
 220         ADT_OPT(del_opt, xt_family(par), info->del_set.u.compat.dim,
 221                 info->del_set.u.compat.flags, 0, UINT_MAX,
 222                 0, 0, 0, 0);
 223
 224         if (info->add_set.index != IPSET_INVALID_ID)
 225                 ip_set_add(info->add_set.index, skb, par, &add_opt);
 226         if (info->del_set.index != IPSET_INVALID_ID)
 227                 ip_set_del(info->del_set.index, skb, par, &del_opt);
 228
 229         return XT_CONTINUE;
 230 }
 231
 232 static int
 233 set_target_v0_checkentry(const struct xt_tgchk_param *par)
 234 {
 235         struct xt_set_info_target_v0 *info = par->targinfo;
 236         ip_set_id_t index;
 237
 238         if (info->add_set.index != IPSET_INVALID_ID) {
 239                 index = ip_set_nfnl_get_byindex(par->net, info->add_set.index);
 240                 if (index == IPSET_INVALID_ID) {
 241                         pr_info_ratelimited("Cannot find add_set index %u as target\n",
 242                                             info->add_set.index);
 243                         return -ENOENT;
 244                 }
 245         }
 246
 247         if (info->del_set.index != IPSET_INVALID_ID) {
 248                 index = ip_set_nfnl_get_byindex(par->net, info->del_set.index);
 249                 if (index == IPSET_INVALID_ID) {
 250                         pr_info_ratelimited("Cannot find del_set index %u as target\n",
 251                                             info->del_set.index);
 252                         if (info->add_set.index != IPSET_INVALID_ID)
 253                                 ip_set_nfnl_put(par->net, info->add_set.index);
 254                         return -ENOENT;
 255                 }
 256         }
 257         if (info->add_set.u.flags[IPSET_DIM_MAX - 1] != 0 ||
 258             info->del_set.u.flags[IPSET_DIM_MAX - 1] != 0) {
 259                 pr_info_ratelimited("SET target dimension over the limit!\n");
 260                 if (info->add_set.index != IPSET_INVALID_ID)
 261                         ip_set_nfnl_put(par->net, info->add_set.index);
 262                 if (info->del_set.index != IPSET_INVALID_ID)
 263                         ip_set_nfnl_put(par->net, info->del_set.index);
 264                 return -ERANGE;
 265         }
 266
 267         /* Fill out compatibility data */
 268         compat_flags(&info->add_set);
 269         compat_flags(&info->del_set);
 270
 271         return 0;
 272 }
 273
 274 static void
 275 set_target_v0_destroy(const struct xt_tgdtor_param *par)
 276 {
 277         const struct xt_set_info_target_v0 *info = par->targinfo;
 278
 279         if (info->add_set.index != IPSET_INVALID_ID)
 280                 ip_set_nfnl_put(par->net, info->add_set.index);
 281         if (info->del_set.index != IPSET_INVALID_ID)
 282                 ip_set_nfnl_put(par->net, info->del_set.index);
 283 }
 284
 285 /* Revision 1 target */
 286
 287 static unsigned int
 288 set_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
 289 {
 290         const struct xt_set_info_target_v1 *info = par->targinfo;
 291
 292         ADT_OPT(add_opt, xt_family(par), info->add_set.dim,
 293                 info->add_set.flags, 0, UINT_MAX,
 294                 0, 0, 0, 0);
 295         ADT_OPT(del_opt, xt_family(par), info->del_set.dim,
 296                 info->del_set.flags, 0, UINT_MAX,
 297                 0, 0, 0, 0);
 298
 299         if (info->add_set.index != IPSET_INVALID_ID)
 300                 ip_set_add(info->add_set.index, skb, par, &add_opt);
 301         if (info->del_set.index != IPSET_INVALID_ID)
 302                 ip_set_del(info->del_set.index, skb, par, &del_opt);
 303
 304         return XT_CONTINUE;
 305 }
 306
 307 static int
 308 set_target_v1_checkentry(const struct xt_tgchk_param *par)
 309 {
 310         const struct xt_set_info_target_v1 *info = par->targinfo;
 311         ip_set_id_t index;
 312
 313         if (info->add_set.index != IPSET_INVALID_ID) {
 314                 index = ip_set_nfnl_get_byindex(par->net, info->add_set.index);
 315                 if (index == IPSET_INVALID_ID) {
 316                         pr_info_ratelimited("Cannot find add_set index %u as target\n",
 317                                             info->add_set.index);
 318                         return -ENOENT;
 319                 }
 320         }
 321
 322         if (info->del_set.index != IPSET_INVALID_ID) {
 323                 index = ip_set_nfnl_get_byindex(par->net, info->del_set.index);
 324                 if (index == IPSET_INVALID_ID) {
 325                         pr_info_ratelimited("Cannot find del_set index %u as target\n",
 326                                             info->del_set.index);
 327                         if (info->add_set.index != IPSET_INVALID_ID)
 328                                 ip_set_nfnl_put(par->net, info->add_set.index);
 329                         return -ENOENT;
 330                 }
 331         }
 332         if (info->add_set.dim > IPSET_DIM_MAX ||
 333             info->del_set.dim > IPSET_DIM_MAX) {
 334                 pr_info_ratelimited("SET target dimension over the limit!\n");
 335                 if (info->add_set.index != IPSET_INVALID_ID)
 336                         ip_set_nfnl_put(par->net, info->add_set.index);
 337                 if (info->del_set.index != IPSET_INVALID_ID)
 338                         ip_set_nfnl_put(par->net, info->del_set.index);
 339                 return -ERANGE;
 340         }
 341
 342         return 0;
 343 }
 344
 345 static void
 346 set_target_v1_destroy(const struct xt_tgdtor_param *par)
 347 {
 348         const struct xt_set_info_target_v1 *info = par->targinfo;
 349
 350         if (info->add_set.index != IPSET_INVALID_ID)
 351                 ip_set_nfnl_put(par->net, info->add_set.index);
 352         if (info->del_set.index != IPSET_INVALID_ID)
 353                 ip_set_nfnl_put(par->net, info->del_set.index);
 354 }
 355
 356 /* Revision 2 target */
 357
 358 static unsigned int
 359 set_target_v2(struct sk_buff *skb, const struct xt_action_param *par)
 360 {
 361         const struct xt_set_info_target_v2 *info = par->targinfo;
 362
 363         ADT_OPT(add_opt, xt_family(par), info->add_set.dim,
 364                 info->add_set.flags, info->flags, info->timeout,
 365                 0, 0, 0, 0);
 366         ADT_OPT(del_opt, xt_family(par), info->del_set.dim,
 367                 info->del_set.flags, 0, UINT_MAX,
 368                 0, 0, 0, 0);
 369
 370         /* Normalize to fit into jiffies */
 371         if (add_opt.ext.timeout != IPSET_NO_TIMEOUT &&
 372             add_opt.ext.timeout > IPSET_MAX_TIMEOUT)
 373                 add_opt.ext.timeout = IPSET_MAX_TIMEOUT;
 374         if (info->add_set.index != IPSET_INVALID_ID)
 375                 ip_set_add(info->add_set.index, skb, par, &add_opt);
 376         if (info->del_set.index != IPSET_INVALID_ID)
 377                 ip_set_del(info->del_set.index, skb, par, &del_opt);
 378
 379         return XT_CONTINUE;
 380 }
 381
 382 #define set_target_v2_checkentry        set_target_v1_checkentry
 383 #define set_target_v2_destroy           set_target_v1_destroy
 384
 385 /* Revision 3 target */
 386
 387 #define MOPT(opt, member)       ((opt).ext.skbinfo.member)
 388
 389 static unsigned int
 390 set_target_v3(struct sk_buff *skb, const struct xt_action_param *par)
 391 {
 392         const struct xt_set_info_target_v3 *info = par->targinfo;
 393         int ret;
 394
 395         ADT_OPT(add_opt, xt_family(par), info->add_set.dim,
 396                 info->add_set.flags, info->flags, info->timeout,
 397                 0, 0, 0, 0);
 398         ADT_OPT(del_opt, xt_family(par), info->del_set.dim,
 399                 info->del_set.flags, 0, UINT_MAX,
 400                 0, 0, 0, 0);
 401         ADT_OPT(map_opt, xt_family(par), info->map_set.dim,
 402                 info->map_set.flags, 0, UINT_MAX,
 403                 0, 0, 0, 0);
 404
 405         /* Normalize to fit into jiffies */
 406         if (add_opt.ext.timeout != IPSET_NO_TIMEOUT &&
 407             add_opt.ext.timeout > IPSET_MAX_TIMEOUT)
 408                 add_opt.ext.timeout = IPSET_MAX_TIMEOUT;
 409         if (info->add_set.index != IPSET_INVALID_ID)
 410                 ip_set_add(info->add_set.index, skb, par, &add_opt);
 411         if (info->del_set.index != IPSET_INVALID_ID)
 412                 ip_set_del(info->del_set.index, skb, par, &del_opt);
 413         if (info->map_set.index != IPSET_INVALID_ID) {
 414                 map_opt.cmdflags |= info->flags & (IPSET_FLAG_MAP_SKBMARK |
 415                                                    IPSET_FLAG_MAP_SKBPRIO |
 416                                                    IPSET_FLAG_MAP_SKBQUEUE);
 417                 ret = match_set(info->map_set.index, skb, par, &map_opt,
 418                                 info->map_set.flags & IPSET_INV_MATCH);
 419                 if (!ret)
 420                         return XT_CONTINUE;
 421                 if (map_opt.cmdflags & IPSET_FLAG_MAP_SKBMARK)
 422                         skb->mark = (skb->mark & ~MOPT(map_opt,skbmarkmask))
 423                                     ^ MOPT(map_opt, skbmark);
 424                 if (map_opt.cmdflags & IPSET_FLAG_MAP_SKBPRIO)
 425                         skb->priority = MOPT(map_opt, skbprio);
 426                 if ((map_opt.cmdflags & IPSET_FLAG_MAP_SKBQUEUE) &&
 427                     skb->dev &&
 428                     skb->dev->real_num_tx_queues > MOPT(map_opt, skbqueue))
 429                         skb_set_queue_mapping(skb, MOPT(map_opt, skbqueue));
 430         }
 431         return XT_CONTINUE;
 432 }
 433
 434 static int
 435 set_target_v3_checkentry(const struct xt_tgchk_param *par)
 436 {
 437         const struct xt_set_info_target_v3 *info = par->targinfo;
 438         ip_set_id_t index;
 439
 440         if (info->add_set.index != IPSET_INVALID_ID) {
 441                 index = ip_set_nfnl_get_byindex(par->net,
 442                                                 info->add_set.index);
 443                 if (index == IPSET_INVALID_ID) {
 444                         pr_info_ratelimited("Cannot find add_set index %u as target\n",
 445                                             info->add_set.index);
 446                         return -ENOENT;
 447                 }
 448         }
 449
 450         if (info->del_set.index != IPSET_INVALID_ID) {
 451                 index = ip_set_nfnl_get_byindex(par->net,
 452                                                 info->del_set.index);
 453                 if (index == IPSET_INVALID_ID) {
 454                         pr_info_ratelimited("Cannot find del_set index %u as target\n",
 455                                             info->del_set.index);
 456                         if (info->add_set.index != IPSET_INVALID_ID)
 457                                 ip_set_nfnl_put(par->net,
 458                                                 info->add_set.index);
 459                         return -ENOENT;
 460                 }
 461         }
 462
 463         if (info->map_set.index != IPSET_INVALID_ID) {
 464                 if (strncmp(par->table, "mangle", 7)) {
 465                         pr_info_ratelimited("--map-set only usable from mangle table\n");
 466                         return -EINVAL;
 467                 }
 468                 if (((info->flags & IPSET_FLAG_MAP_SKBPRIO) |
 469                      (info->flags & IPSET_FLAG_MAP_SKBQUEUE)) &&
 470                      (par->hook_mask & ~(1 << NF_INET_FORWARD |
 471                                          1 << NF_INET_LOCAL_OUT |
 472                                          1 << NF_INET_POST_ROUTING))) {
 473                         pr_info_ratelimited("mapping of prio or/and queue is allowed only from OUTPUT/FORWARD/POSTROUTING chains\n");
 474                         return -EINVAL;
 475                 }
 476                 index = ip_set_nfnl_get_byindex(par->net,
 477                                                 info->map_set.index);
 478                 if (index == IPSET_INVALID_ID) {
 479                         pr_info_ratelimited("Cannot find map_set index %u as target\n",
 480                                             info->map_set.index);
 481                         if (info->add_set.index != IPSET_INVALID_ID)
 482                                 ip_set_nfnl_put(par->net,
 483                                                 info->add_set.index);
 484                         if (info->del_set.index != IPSET_INVALID_ID)
 485                                 ip_set_nfnl_put(par->net,
 486                                                 info->del_set.index);
 487                         return -ENOENT;
 488                 }
 489         }
 490
 491         if (info->add_set.dim > IPSET_DIM_MAX ||
 492             info->del_set.dim > IPSET_DIM_MAX ||
 493             info->map_set.dim > IPSET_DIM_MAX) {
 494                 pr_info_ratelimited("SET target dimension over the limit!\n");
 495                 if (info->add_set.index != IPSET_INVALID_ID)
 496                         ip_set_nfnl_put(par->net, info->add_set.index);
 497                 if (info->del_set.index != IPSET_INVALID_ID)
 498                         ip_set_nfnl_put(par->net, info->del_set.index);
 499                 if (info->map_set.index != IPSET_INVALID_ID)
 500                         ip_set_nfnl_put(par->net, info->map_set.index);
 501                 return -ERANGE;
 502         }
 503
 504         return 0;
 505 }
 506
 507 static void
 508 set_target_v3_destroy(const struct xt_tgdtor_param *par)
 509 {
 510         const struct xt_set_info_target_v3 *info = par->targinfo;
 511
 512         if (info->add_set.index != IPSET_INVALID_ID)
 513                 ip_set_nfnl_put(par->net, info->add_set.index);
 514         if (info->del_set.index != IPSET_INVALID_ID)
 515                 ip_set_nfnl_put(par->net, info->del_set.index);
 516         if (info->map_set.index != IPSET_INVALID_ID)
 517                 ip_set_nfnl_put(par->net, info->map_set.index);
 518 }
 519
 520 static struct xt_match set_matches[] __read_mostly = {
 521         {
 522                 .name           = "set",
 523                 .family         = NFPROTO_IPV4,
 524                 .revision       = 0,
 525                 .match          = set_match_v0,
 526                 .matchsize      = sizeof(struct xt_set_info_match_v0),
 527                 .checkentry     = set_match_v0_checkentry,
 528                 .destroy        = set_match_v0_destroy,
 529                 .me             = THIS_MODULE
 530         },
 531         {
 532                 .name           = "set",
 533                 .family         = NFPROTO_IPV4,
 534                 .revision       = 1,
 535                 .match          = set_match_v1,
 536                 .matchsize      = sizeof(struct xt_set_info_match_v1),
 537                 .checkentry     = set_match_v1_checkentry,
 538                 .destroy        = set_match_v1_destroy,
 539                 .me             = THIS_MODULE
 540         },
 541         {
 542                 .name           = "set",
 543                 .family         = NFPROTO_IPV6,
 544                 .revision       = 1,
 545                 .match          = set_match_v1,
 546                 .matchsize      = sizeof(struct xt_set_info_match_v1),
 547                 .checkentry     = set_match_v1_checkentry,
 548                 .destroy        = set_match_v1_destroy,
 549                 .me             = THIS_MODULE
 550         },
 551         /* --return-nomatch flag support */
 552         {
 553                 .name           = "set",
 554                 .family         = NFPROTO_IPV4,
 555                 .revision       = 2,
 556                 .match          = set_match_v1,
 557                 .matchsize      = sizeof(struct xt_set_info_match_v1),
 558                 .checkentry     = set_match_v1_checkentry,
 559                 .destroy        = set_match_v1_destroy,
 560                 .me             = THIS_MODULE
 561         },
 562         {
 563                 .name           = "set",
 564                 .family         = NFPROTO_IPV6,
 565                 .revision       = 2,
 566                 .match          = set_match_v1,
 567                 .matchsize      = sizeof(struct xt_set_info_match_v1),
 568                 .checkentry     = set_match_v1_checkentry,
 569                 .destroy        = set_match_v1_destroy,
 570                 .me             = THIS_MODULE
 571         },
 572         /* counters support: update, match */
 573         {
 574                 .name           = "set",
 575                 .family         = NFPROTO_IPV4,
 576                 .revision       = 3,
 577                 .match          = set_match_v3,
 578                 .matchsize      = sizeof(struct xt_set_info_match_v3),
 579                 .checkentry     = set_match_v3_checkentry,
 580                 .destroy        = set_match_v3_destroy,
 581                 .me             = THIS_MODULE
 582         },
 583         {
 584                 .name           = "set",
 585                 .family         = NFPROTO_IPV6,
 586                 .revision       = 3,
 587                 .match          = set_match_v3,
 588                 .matchsize      = sizeof(struct xt_set_info_match_v3),
 589                 .checkentry     = set_match_v3_checkentry,
 590                 .destroy        = set_match_v3_destroy,
 591                 .me             = THIS_MODULE
 592         },
 593         /* new revision for counters support: update, match */
 594         {
 595                 .name           = "set",
 596                 .family         = NFPROTO_IPV4,
 597                 .revision       = 4,
 598                 .match          = set_match_v4,
 599                 .matchsize      = sizeof(struct xt_set_info_match_v4),
 600                 .checkentry     = set_match_v4_checkentry,
 601                 .destroy        = set_match_v4_destroy,
 602                 .me             = THIS_MODULE
 603         },
 604         {
 605                 .name           = "set",
 606                 .family         = NFPROTO_IPV6,
 607                 .revision       = 4,
 608                 .match          = set_match_v4,
 609                 .matchsize      = sizeof(struct xt_set_info_match_v4),
 610                 .checkentry     = set_match_v4_checkentry,
 611                 .destroy        = set_match_v4_destroy,
 612                 .me             = THIS_MODULE
 613         },
 614 };
 615
 616 static struct xt_target set_targets[] __read_mostly = {
 617         {
 618                 .name           = "SET",
 619                 .revision       = 0,
 620                 .family         = NFPROTO_IPV4,
 621                 .target         = set_target_v0,
 622                 .targetsize     = sizeof(struct xt_set_info_target_v0),
 623                 .checkentry     = set_target_v0_checkentry,
 624                 .destroy        = set_target_v0_destroy,
 625                 .me             = THIS_MODULE
 626         },
 627         {
 628                 .name           = "SET",
 629                 .revision       = 1,
 630                 .family         = NFPROTO_IPV4,
 631                 .target         = set_target_v1,
 632                 .targetsize     = sizeof(struct xt_set_info_target_v1),
 633                 .checkentry     = set_target_v1_checkentry,
 634                 .destroy        = set_target_v1_destroy,
 635                 .me             = THIS_MODULE
 636         },
 637         {
 638                 .name           = "SET",
 639                 .revision       = 1,
 640                 .family         = NFPROTO_IPV6,
 641                 .target         = set_target_v1,
 642                 .targetsize     = sizeof(struct xt_set_info_target_v1),
 643                 .checkentry     = set_target_v1_checkentry,
 644                 .destroy        = set_target_v1_destroy,
 645                 .me             = THIS_MODULE
 646         },
 647         /* --timeout and --exist flags support */
 648         {
 649                 .name           = "SET",
 650                 .revision       = 2,
 651                 .family         = NFPROTO_IPV4,
 652                 .target         = set_target_v2,
 653                 .targetsize     = sizeof(struct xt_set_info_target_v2),
 654                 .checkentry     = set_target_v2_checkentry,
 655                 .destroy        = set_target_v2_destroy,
 656                 .me             = THIS_MODULE
 657         },
 658         {
 659                 .name           = "SET",
 660                 .revision       = 2,
 661                 .family         = NFPROTO_IPV6,
 662                 .target         = set_target_v2,
 663                 .targetsize     = sizeof(struct xt_set_info_target_v2),
 664                 .checkentry     = set_target_v2_checkentry,
 665                 .destroy        = set_target_v2_destroy,
 666                 .me             = THIS_MODULE
 667         },
 668         /* --map-set support */
 669         {
 670                 .name           = "SET",
 671                 .revision       = 3,
 672                 .family         = NFPROTO_IPV4,
 673                 .target         = set_target_v3,
 674                 .targetsize     = sizeof(struct xt_set_info_target_v3),
 675                 .checkentry     = set_target_v3_checkentry,
 676                 .destroy        = set_target_v3_destroy,
 677                 .me             = THIS_MODULE
 678         },
 679         {
 680                 .name           = "SET",
 681                 .revision       = 3,
 682                 .family         = NFPROTO_IPV6,
 683                 .target         = set_target_v3,
 684                 .targetsize     = sizeof(struct xt_set_info_target_v3),
 685                 .checkentry     = set_target_v3_checkentry,
 686                 .destroy        = set_target_v3_destroy,
 687                 .me             = THIS_MODULE
 688         },
 689 };
 690
 691 static int __init xt_set_init(void)
 692 {
 693         int ret = xt_register_matches(set_matches, ARRAY_SIZE(set_matches));
 694
 695         if (!ret) {
 696                 ret = xt_register_targets(set_targets,
 697                                           ARRAY_SIZE(set_targets));
 698                 if (ret)
 699                         xt_unregister_matches(set_matches,
 700                                               ARRAY_SIZE(set_matches));
 701         }
 702         return ret;
 703 }
 704
 705 static void __exit xt_set_fini(void)
 706 {
 707         xt_unregister_matches(set_matches, ARRAY_SIZE(set_matches));
 708         xt_unregister_targets(set_targets, ARRAY_SIZE(set_targets));
 709 }
 710
 711 module_init(xt_set_init);
 712 module_exit(xt_set_fini);