Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu> |
| 2 | * Patrick Schaaf <bof@bof.de> |
| 3 | * Martin Josefsson <gandalf@wlug.westbo.se> |
| 4 | * Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | /* Kernel module implementing an IP set type: the bitmap:ip,mac type */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/ip.h> |
| 15 | #include <linux/etherdevice.h> |
| 16 | #include <linux/skbuff.h> |
| 17 | #include <linux/errno.h> |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 18 | #include <linux/if_ether.h> |
| 19 | #include <linux/netlink.h> |
| 20 | #include <linux/jiffies.h> |
| 21 | #include <linux/timer.h> |
| 22 | #include <net/netlink.h> |
| 23 | |
| 24 | #include <linux/netfilter/ipset/pfxlen.h> |
| 25 | #include <linux/netfilter/ipset/ip_set.h> |
| 26 | #include <linux/netfilter/ipset/ip_set_timeout.h> |
| 27 | #include <linux/netfilter/ipset/ip_set_bitmap.h> |
| 28 | |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 29 | #define REVISION_MIN 0 |
| 30 | #define REVISION_MAX 0 |
| 31 | |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 32 | MODULE_LICENSE("GPL"); |
| 33 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 34 | IP_SET_MODULE_DESC("bitmap:ip,mac", REVISION_MIN, REVISION_MAX); |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 35 | MODULE_ALIAS("ip_set_bitmap:ip,mac"); |
| 36 | |
| 37 | enum { |
| 38 | MAC_EMPTY, /* element is not set */ |
| 39 | MAC_FILLED, /* element is set with MAC */ |
| 40 | MAC_UNSET, /* element is set, without MAC */ |
| 41 | }; |
| 42 | |
| 43 | /* Type structure */ |
| 44 | struct bitmap_ipmac { |
| 45 | void *members; /* the set members */ |
| 46 | u32 first_ip; /* host byte order, included in range */ |
| 47 | u32 last_ip; /* host byte order, included in range */ |
| 48 | u32 timeout; /* timeout value */ |
| 49 | struct timer_list gc; /* garbage collector */ |
| 50 | size_t dsize; /* size of element */ |
| 51 | }; |
| 52 | |
| 53 | /* ADT structure for generic function args */ |
| 54 | struct ipmac { |
| 55 | u32 id; /* id in array */ |
| 56 | unsigned char *ether; /* ethernet address */ |
| 57 | }; |
| 58 | |
| 59 | /* Member element without and with timeout */ |
| 60 | |
| 61 | struct ipmac_elem { |
| 62 | unsigned char ether[ETH_ALEN]; |
| 63 | unsigned char match; |
| 64 | } __attribute__ ((aligned)); |
| 65 | |
| 66 | struct ipmac_telem { |
| 67 | unsigned char ether[ETH_ALEN]; |
| 68 | unsigned char match; |
| 69 | unsigned long timeout; |
| 70 | } __attribute__ ((aligned)); |
| 71 | |
| 72 | static inline void * |
| 73 | bitmap_ipmac_elem(const struct bitmap_ipmac *map, u32 id) |
| 74 | { |
| 75 | return (void *)((char *)map->members + id * map->dsize); |
| 76 | } |
| 77 | |
| 78 | static inline bool |
| 79 | bitmap_timeout(const struct bitmap_ipmac *map, u32 id) |
| 80 | { |
| 81 | const struct ipmac_telem *elem = bitmap_ipmac_elem(map, id); |
| 82 | |
| 83 | return ip_set_timeout_test(elem->timeout); |
| 84 | } |
| 85 | |
| 86 | static inline bool |
| 87 | bitmap_expired(const struct bitmap_ipmac *map, u32 id) |
| 88 | { |
| 89 | const struct ipmac_telem *elem = bitmap_ipmac_elem(map, id); |
| 90 | |
| 91 | return ip_set_timeout_expired(elem->timeout); |
| 92 | } |
| 93 | |
| 94 | static inline int |
| 95 | bitmap_ipmac_exist(const struct ipmac_telem *elem) |
| 96 | { |
| 97 | return elem->match == MAC_UNSET || |
| 98 | (elem->match == MAC_FILLED && |
| 99 | !ip_set_timeout_expired(elem->timeout)); |
| 100 | } |
| 101 | |
| 102 | /* Base variant */ |
| 103 | |
| 104 | static int |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 105 | bitmap_ipmac_test(struct ip_set *set, void *value, u32 timeout, u32 flags) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 106 | { |
| 107 | const struct bitmap_ipmac *map = set->data; |
| 108 | const struct ipmac *data = value; |
| 109 | const struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); |
| 110 | |
| 111 | switch (elem->match) { |
| 112 | case MAC_UNSET: |
| 113 | /* Trigger kernel to fill out the ethernet address */ |
| 114 | return -EAGAIN; |
| 115 | case MAC_FILLED: |
| 116 | return data->ether == NULL || |
Joe Perches | 8561cf9 | 2012-05-08 18:56:54 +0000 | [diff] [blame] | 117 | ether_addr_equal(data->ether, elem->ether); |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 118 | } |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | static int |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 123 | bitmap_ipmac_add(struct ip_set *set, void *value, u32 timeout, u32 flags) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 124 | { |
| 125 | struct bitmap_ipmac *map = set->data; |
| 126 | const struct ipmac *data = value; |
| 127 | struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); |
| 128 | |
| 129 | switch (elem->match) { |
| 130 | case MAC_UNSET: |
| 131 | if (!data->ether) |
| 132 | /* Already added without ethernet address */ |
| 133 | return -IPSET_ERR_EXIST; |
| 134 | /* Fill the MAC address */ |
| 135 | memcpy(elem->ether, data->ether, ETH_ALEN); |
| 136 | elem->match = MAC_FILLED; |
| 137 | break; |
| 138 | case MAC_FILLED: |
| 139 | return -IPSET_ERR_EXIST; |
| 140 | case MAC_EMPTY: |
| 141 | if (data->ether) { |
| 142 | memcpy(elem->ether, data->ether, ETH_ALEN); |
| 143 | elem->match = MAC_FILLED; |
| 144 | } else |
| 145 | elem->match = MAC_UNSET; |
| 146 | } |
| 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static int |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 152 | bitmap_ipmac_del(struct ip_set *set, void *value, u32 timeout, u32 flags) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 153 | { |
| 154 | struct bitmap_ipmac *map = set->data; |
| 155 | const struct ipmac *data = value; |
| 156 | struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); |
| 157 | |
| 158 | if (elem->match == MAC_EMPTY) |
| 159 | return -IPSET_ERR_EXIST; |
| 160 | |
| 161 | elem->match = MAC_EMPTY; |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static int |
| 167 | bitmap_ipmac_list(const struct ip_set *set, |
| 168 | struct sk_buff *skb, struct netlink_callback *cb) |
| 169 | { |
| 170 | const struct bitmap_ipmac *map = set->data; |
| 171 | const struct ipmac_elem *elem; |
| 172 | struct nlattr *atd, *nested; |
| 173 | u32 id, first = cb->args[2]; |
| 174 | u32 last = map->last_ip - map->first_ip; |
| 175 | |
| 176 | atd = ipset_nest_start(skb, IPSET_ATTR_ADT); |
| 177 | if (!atd) |
| 178 | return -EMSGSIZE; |
| 179 | for (; cb->args[2] <= last; cb->args[2]++) { |
| 180 | id = cb->args[2]; |
| 181 | elem = bitmap_ipmac_elem(map, id); |
| 182 | if (elem->match == MAC_EMPTY) |
| 183 | continue; |
| 184 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); |
| 185 | if (!nested) { |
| 186 | if (id == first) { |
| 187 | nla_nest_cancel(skb, atd); |
| 188 | return -EMSGSIZE; |
| 189 | } else |
| 190 | goto nla_put_failure; |
| 191 | } |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 192 | if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, |
| 193 | htonl(map->first_ip + id)) || |
| 194 | (elem->match == MAC_FILLED && |
| 195 | nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, |
| 196 | elem->ether))) |
| 197 | goto nla_put_failure; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 198 | ipset_nest_end(skb, nested); |
| 199 | } |
| 200 | ipset_nest_end(skb, atd); |
| 201 | /* Set listing finished */ |
| 202 | cb->args[2] = 0; |
| 203 | |
| 204 | return 0; |
| 205 | |
| 206 | nla_put_failure: |
| 207 | nla_nest_cancel(skb, nested); |
| 208 | ipset_nest_end(skb, atd); |
| 209 | if (unlikely(id == first)) { |
| 210 | cb->args[2] = 0; |
| 211 | return -EMSGSIZE; |
| 212 | } |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | /* Timeout variant */ |
| 217 | |
| 218 | static int |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 219 | bitmap_ipmac_ttest(struct ip_set *set, void *value, u32 timeout, u32 flags) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 220 | { |
| 221 | const struct bitmap_ipmac *map = set->data; |
| 222 | const struct ipmac *data = value; |
| 223 | const struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); |
| 224 | |
| 225 | switch (elem->match) { |
| 226 | case MAC_UNSET: |
| 227 | /* Trigger kernel to fill out the ethernet address */ |
| 228 | return -EAGAIN; |
| 229 | case MAC_FILLED: |
| 230 | return (data->ether == NULL || |
Joe Perches | 8561cf9 | 2012-05-08 18:56:54 +0000 | [diff] [blame] | 231 | ether_addr_equal(data->ether, elem->ether)) && |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 232 | !bitmap_expired(map, data->id); |
| 233 | } |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static int |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 238 | bitmap_ipmac_tadd(struct ip_set *set, void *value, u32 timeout, u32 flags) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 239 | { |
| 240 | struct bitmap_ipmac *map = set->data; |
| 241 | const struct ipmac *data = value; |
| 242 | struct ipmac_telem *elem = bitmap_ipmac_elem(map, data->id); |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 243 | bool flag_exist = flags & IPSET_FLAG_EXIST; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 244 | |
| 245 | switch (elem->match) { |
| 246 | case MAC_UNSET: |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 247 | if (!(data->ether || flag_exist)) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 248 | /* Already added without ethernet address */ |
| 249 | return -IPSET_ERR_EXIST; |
| 250 | /* Fill the MAC address and activate the timer */ |
| 251 | memcpy(elem->ether, data->ether, ETH_ALEN); |
| 252 | elem->match = MAC_FILLED; |
| 253 | if (timeout == map->timeout) |
| 254 | /* Timeout was not specified, get stored one */ |
| 255 | timeout = elem->timeout; |
| 256 | elem->timeout = ip_set_timeout_set(timeout); |
| 257 | break; |
| 258 | case MAC_FILLED: |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 259 | if (!(bitmap_expired(map, data->id) || flag_exist)) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 260 | return -IPSET_ERR_EXIST; |
| 261 | /* Fall through */ |
| 262 | case MAC_EMPTY: |
| 263 | if (data->ether) { |
| 264 | memcpy(elem->ether, data->ether, ETH_ALEN); |
| 265 | elem->match = MAC_FILLED; |
| 266 | } else |
| 267 | elem->match = MAC_UNSET; |
| 268 | /* If MAC is unset yet, we store plain timeout value |
| 269 | * because the timer is not activated yet |
| 270 | * and we can reuse it later when MAC is filled out, |
| 271 | * possibly by the kernel */ |
| 272 | elem->timeout = data->ether ? ip_set_timeout_set(timeout) |
| 273 | : timeout; |
| 274 | break; |
| 275 | } |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static int |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 281 | bitmap_ipmac_tdel(struct ip_set *set, void *value, u32 timeout, u32 flags) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 282 | { |
| 283 | struct bitmap_ipmac *map = set->data; |
| 284 | const struct ipmac *data = value; |
| 285 | struct ipmac_telem *elem = bitmap_ipmac_elem(map, data->id); |
| 286 | |
| 287 | if (elem->match == MAC_EMPTY || bitmap_expired(map, data->id)) |
| 288 | return -IPSET_ERR_EXIST; |
| 289 | |
| 290 | elem->match = MAC_EMPTY; |
| 291 | |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | static int |
| 296 | bitmap_ipmac_tlist(const struct ip_set *set, |
| 297 | struct sk_buff *skb, struct netlink_callback *cb) |
| 298 | { |
| 299 | const struct bitmap_ipmac *map = set->data; |
| 300 | const struct ipmac_telem *elem; |
| 301 | struct nlattr *atd, *nested; |
| 302 | u32 id, first = cb->args[2]; |
| 303 | u32 timeout, last = map->last_ip - map->first_ip; |
| 304 | |
| 305 | atd = ipset_nest_start(skb, IPSET_ATTR_ADT); |
| 306 | if (!atd) |
| 307 | return -EMSGSIZE; |
| 308 | for (; cb->args[2] <= last; cb->args[2]++) { |
| 309 | id = cb->args[2]; |
| 310 | elem = bitmap_ipmac_elem(map, id); |
| 311 | if (!bitmap_ipmac_exist(elem)) |
| 312 | continue; |
| 313 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); |
| 314 | if (!nested) { |
| 315 | if (id == first) { |
| 316 | nla_nest_cancel(skb, atd); |
| 317 | return -EMSGSIZE; |
| 318 | } else |
| 319 | goto nla_put_failure; |
| 320 | } |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 321 | if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, |
| 322 | htonl(map->first_ip + id)) || |
| 323 | (elem->match == MAC_FILLED && |
| 324 | nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, |
| 325 | elem->ether))) |
Jozsef Kadlecsik | 3ace95c | 2012-09-21 22:01:45 +0200 | [diff] [blame] | 326 | goto nla_put_failure; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 327 | timeout = elem->match == MAC_UNSET ? elem->timeout |
| 328 | : ip_set_timeout_get(elem->timeout); |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 329 | if (nla_put_net32(skb, IPSET_ATTR_TIMEOUT, htonl(timeout))) |
Jozsef Kadlecsik | 3ace95c | 2012-09-21 22:01:45 +0200 | [diff] [blame] | 330 | goto nla_put_failure; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 331 | ipset_nest_end(skb, nested); |
| 332 | } |
| 333 | ipset_nest_end(skb, atd); |
| 334 | /* Set listing finished */ |
| 335 | cb->args[2] = 0; |
| 336 | |
| 337 | return 0; |
| 338 | |
| 339 | nla_put_failure: |
| 340 | nla_nest_cancel(skb, nested); |
| 341 | ipset_nest_end(skb, atd); |
| 342 | return -EMSGSIZE; |
| 343 | } |
| 344 | |
| 345 | static int |
| 346 | bitmap_ipmac_kadt(struct ip_set *set, const struct sk_buff *skb, |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 347 | const struct xt_action_param *par, |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 348 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 349 | { |
| 350 | struct bitmap_ipmac *map = set->data; |
| 351 | ipset_adtfn adtfn = set->variant->adt[adt]; |
| 352 | struct ipmac data; |
| 353 | |
Jozsef Kadlecsik | 0e8a835 | 2011-04-13 13:43:23 +0200 | [diff] [blame] | 354 | /* MAC can be src only */ |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 355 | if (!(opt->flags & IPSET_DIM_TWO_SRC)) |
Jozsef Kadlecsik | 0e8a835 | 2011-04-13 13:43:23 +0200 | [diff] [blame] | 356 | return 0; |
| 357 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 358 | data.id = ntohl(ip4addr(skb, opt->flags & IPSET_DIM_ONE_SRC)); |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 359 | if (data.id < map->first_ip || data.id > map->last_ip) |
| 360 | return -IPSET_ERR_BITMAP_RANGE; |
| 361 | |
| 362 | /* Backward compatibility: we don't check the second flag */ |
| 363 | if (skb_mac_header(skb) < skb->head || |
| 364 | (skb_mac_header(skb) + ETH_HLEN) > skb->data) |
| 365 | return -EINVAL; |
| 366 | |
| 367 | data.id -= map->first_ip; |
| 368 | data.ether = eth_hdr(skb)->h_source; |
| 369 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 370 | return adtfn(set, &data, opt_timeout(opt, map), opt->cmdflags); |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | static int |
| 374 | bitmap_ipmac_uadt(struct ip_set *set, struct nlattr *tb[], |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 375 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 376 | { |
| 377 | const struct bitmap_ipmac *map = set->data; |
| 378 | ipset_adtfn adtfn = set->variant->adt[adt]; |
| 379 | struct ipmac data; |
| 380 | u32 timeout = map->timeout; |
| 381 | int ret = 0; |
| 382 | |
| 383 | if (unlikely(!tb[IPSET_ATTR_IP] || |
| 384 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) |
| 385 | return -IPSET_ERR_PROTOCOL; |
| 386 | |
| 387 | if (tb[IPSET_ATTR_LINENO]) |
| 388 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); |
| 389 | |
| 390 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &data.id); |
| 391 | if (ret) |
| 392 | return ret; |
| 393 | |
| 394 | if (data.id < map->first_ip || data.id > map->last_ip) |
| 395 | return -IPSET_ERR_BITMAP_RANGE; |
| 396 | |
| 397 | if (tb[IPSET_ATTR_ETHER]) |
| 398 | data.ether = nla_data(tb[IPSET_ATTR_ETHER]); |
| 399 | else |
| 400 | data.ether = NULL; |
| 401 | |
| 402 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 403 | if (!with_timeout(map->timeout)) |
| 404 | return -IPSET_ERR_TIMEOUT; |
| 405 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 406 | } |
| 407 | |
| 408 | data.id -= map->first_ip; |
| 409 | |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 410 | ret = adtfn(set, &data, timeout, flags); |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 411 | |
| 412 | return ip_set_eexist(ret, flags) ? 0 : ret; |
| 413 | } |
| 414 | |
| 415 | static void |
| 416 | bitmap_ipmac_destroy(struct ip_set *set) |
| 417 | { |
| 418 | struct bitmap_ipmac *map = set->data; |
| 419 | |
| 420 | if (with_timeout(map->timeout)) |
| 421 | del_timer_sync(&map->gc); |
| 422 | |
| 423 | ip_set_free(map->members); |
| 424 | kfree(map); |
| 425 | |
| 426 | set->data = NULL; |
| 427 | } |
| 428 | |
| 429 | static void |
| 430 | bitmap_ipmac_flush(struct ip_set *set) |
| 431 | { |
| 432 | struct bitmap_ipmac *map = set->data; |
| 433 | |
| 434 | memset(map->members, 0, |
| 435 | (map->last_ip - map->first_ip + 1) * map->dsize); |
| 436 | } |
| 437 | |
| 438 | static int |
| 439 | bitmap_ipmac_head(struct ip_set *set, struct sk_buff *skb) |
| 440 | { |
| 441 | const struct bitmap_ipmac *map = set->data; |
| 442 | struct nlattr *nested; |
| 443 | |
| 444 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); |
| 445 | if (!nested) |
| 446 | goto nla_put_failure; |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 447 | if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, htonl(map->first_ip)) || |
| 448 | nla_put_ipaddr4(skb, IPSET_ATTR_IP_TO, htonl(map->last_ip)) || |
| 449 | nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref - 1)) || |
| 450 | nla_put_net32(skb, IPSET_ATTR_MEMSIZE, |
| 451 | htonl(sizeof(*map) + |
| 452 | ((map->last_ip - map->first_ip + 1) * |
| 453 | map->dsize))) || |
| 454 | (with_timeout(map->timeout) && |
| 455 | nla_put_net32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout)))) |
| 456 | goto nla_put_failure; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 457 | ipset_nest_end(skb, nested); |
| 458 | |
| 459 | return 0; |
| 460 | nla_put_failure: |
| 461 | return -EMSGSIZE; |
| 462 | } |
| 463 | |
| 464 | static bool |
| 465 | bitmap_ipmac_same_set(const struct ip_set *a, const struct ip_set *b) |
| 466 | { |
| 467 | const struct bitmap_ipmac *x = a->data; |
| 468 | const struct bitmap_ipmac *y = b->data; |
| 469 | |
| 470 | return x->first_ip == y->first_ip && |
| 471 | x->last_ip == y->last_ip && |
| 472 | x->timeout == y->timeout; |
| 473 | } |
| 474 | |
| 475 | static const struct ip_set_type_variant bitmap_ipmac = { |
| 476 | .kadt = bitmap_ipmac_kadt, |
| 477 | .uadt = bitmap_ipmac_uadt, |
| 478 | .adt = { |
| 479 | [IPSET_ADD] = bitmap_ipmac_add, |
| 480 | [IPSET_DEL] = bitmap_ipmac_del, |
| 481 | [IPSET_TEST] = bitmap_ipmac_test, |
| 482 | }, |
| 483 | .destroy = bitmap_ipmac_destroy, |
| 484 | .flush = bitmap_ipmac_flush, |
| 485 | .head = bitmap_ipmac_head, |
| 486 | .list = bitmap_ipmac_list, |
| 487 | .same_set = bitmap_ipmac_same_set, |
| 488 | }; |
| 489 | |
| 490 | static const struct ip_set_type_variant bitmap_tipmac = { |
| 491 | .kadt = bitmap_ipmac_kadt, |
| 492 | .uadt = bitmap_ipmac_uadt, |
| 493 | .adt = { |
| 494 | [IPSET_ADD] = bitmap_ipmac_tadd, |
| 495 | [IPSET_DEL] = bitmap_ipmac_tdel, |
| 496 | [IPSET_TEST] = bitmap_ipmac_ttest, |
| 497 | }, |
| 498 | .destroy = bitmap_ipmac_destroy, |
| 499 | .flush = bitmap_ipmac_flush, |
| 500 | .head = bitmap_ipmac_head, |
| 501 | .list = bitmap_ipmac_tlist, |
| 502 | .same_set = bitmap_ipmac_same_set, |
| 503 | }; |
| 504 | |
| 505 | static void |
| 506 | bitmap_ipmac_gc(unsigned long ul_set) |
| 507 | { |
| 508 | struct ip_set *set = (struct ip_set *) ul_set; |
| 509 | struct bitmap_ipmac *map = set->data; |
| 510 | struct ipmac_telem *elem; |
| 511 | u32 id, last = map->last_ip - map->first_ip; |
| 512 | |
| 513 | /* We run parallel with other readers (test element) |
| 514 | * but adding/deleting new entries is locked out */ |
| 515 | read_lock_bh(&set->lock); |
| 516 | for (id = 0; id <= last; id++) { |
| 517 | elem = bitmap_ipmac_elem(map, id); |
| 518 | if (elem->match == MAC_FILLED && |
| 519 | ip_set_timeout_expired(elem->timeout)) |
| 520 | elem->match = MAC_EMPTY; |
| 521 | } |
| 522 | read_unlock_bh(&set->lock); |
| 523 | |
| 524 | map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; |
| 525 | add_timer(&map->gc); |
| 526 | } |
| 527 | |
| 528 | static void |
| 529 | bitmap_ipmac_gc_init(struct ip_set *set) |
| 530 | { |
| 531 | struct bitmap_ipmac *map = set->data; |
| 532 | |
| 533 | init_timer(&map->gc); |
| 534 | map->gc.data = (unsigned long) set; |
| 535 | map->gc.function = bitmap_ipmac_gc; |
| 536 | map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; |
| 537 | add_timer(&map->gc); |
| 538 | } |
| 539 | |
| 540 | /* Create bitmap:ip,mac type of sets */ |
| 541 | |
| 542 | static bool |
| 543 | init_map_ipmac(struct ip_set *set, struct bitmap_ipmac *map, |
| 544 | u32 first_ip, u32 last_ip) |
| 545 | { |
| 546 | map->members = ip_set_alloc((last_ip - first_ip + 1) * map->dsize); |
| 547 | if (!map->members) |
| 548 | return false; |
| 549 | map->first_ip = first_ip; |
| 550 | map->last_ip = last_ip; |
| 551 | map->timeout = IPSET_NO_TIMEOUT; |
| 552 | |
| 553 | set->data = map; |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 554 | set->family = NFPROTO_IPV4; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 555 | |
| 556 | return true; |
| 557 | } |
| 558 | |
| 559 | static int |
| 560 | bitmap_ipmac_create(struct ip_set *set, struct nlattr *tb[], |
| 561 | u32 flags) |
| 562 | { |
Jozsef Kadlecsik | b9fed74 | 2012-09-04 17:45:59 +0200 | [diff] [blame] | 563 | u32 first_ip, last_ip; |
| 564 | u64 elements; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 565 | struct bitmap_ipmac *map; |
| 566 | int ret; |
| 567 | |
| 568 | if (unlikely(!tb[IPSET_ATTR_IP] || |
| 569 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) |
| 570 | return -IPSET_ERR_PROTOCOL; |
| 571 | |
| 572 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &first_ip); |
| 573 | if (ret) |
| 574 | return ret; |
| 575 | |
| 576 | if (tb[IPSET_ATTR_IP_TO]) { |
| 577 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &last_ip); |
| 578 | if (ret) |
| 579 | return ret; |
| 580 | if (first_ip > last_ip) { |
| 581 | u32 tmp = first_ip; |
| 582 | |
| 583 | first_ip = last_ip; |
| 584 | last_ip = tmp; |
| 585 | } |
| 586 | } else if (tb[IPSET_ATTR_CIDR]) { |
| 587 | u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); |
| 588 | |
| 589 | if (cidr >= 32) |
| 590 | return -IPSET_ERR_INVALID_CIDR; |
Jozsef Kadlecsik | e6146e8 | 2011-06-16 18:55:58 +0200 | [diff] [blame] | 591 | ip_set_mask_from_to(first_ip, last_ip, cidr); |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 592 | } else |
| 593 | return -IPSET_ERR_PROTOCOL; |
| 594 | |
Jozsef Kadlecsik | b9fed74 | 2012-09-04 17:45:59 +0200 | [diff] [blame] | 595 | elements = (u64)last_ip - first_ip + 1; |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 596 | |
| 597 | if (elements > IPSET_BITMAP_MAX_RANGE + 1) |
| 598 | return -IPSET_ERR_BITMAP_RANGE_SIZE; |
| 599 | |
| 600 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
| 601 | if (!map) |
| 602 | return -ENOMEM; |
| 603 | |
| 604 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 605 | map->dsize = sizeof(struct ipmac_telem); |
| 606 | |
| 607 | if (!init_map_ipmac(set, map, first_ip, last_ip)) { |
| 608 | kfree(map); |
| 609 | return -ENOMEM; |
| 610 | } |
| 611 | |
| 612 | map->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 613 | |
| 614 | set->variant = &bitmap_tipmac; |
| 615 | |
| 616 | bitmap_ipmac_gc_init(set); |
| 617 | } else { |
| 618 | map->dsize = sizeof(struct ipmac_elem); |
| 619 | |
| 620 | if (!init_map_ipmac(set, map, first_ip, last_ip)) { |
| 621 | kfree(map); |
| 622 | return -ENOMEM; |
| 623 | } |
| 624 | set->variant = &bitmap_ipmac; |
| 625 | |
| 626 | } |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | static struct ip_set_type bitmap_ipmac_type = { |
| 631 | .name = "bitmap:ip,mac", |
| 632 | .protocol = IPSET_PROTOCOL, |
| 633 | .features = IPSET_TYPE_IP | IPSET_TYPE_MAC, |
| 634 | .dimension = IPSET_DIM_TWO, |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 635 | .family = NFPROTO_IPV4, |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 636 | .revision_min = REVISION_MIN, |
| 637 | .revision_max = REVISION_MAX, |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 638 | .create = bitmap_ipmac_create, |
| 639 | .create_policy = { |
| 640 | [IPSET_ATTR_IP] = { .type = NLA_NESTED }, |
| 641 | [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED }, |
| 642 | [IPSET_ATTR_CIDR] = { .type = NLA_U8 }, |
| 643 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 644 | }, |
| 645 | .adt_policy = { |
| 646 | [IPSET_ATTR_IP] = { .type = NLA_NESTED }, |
Jozsef Kadlecsik | 15b4d93 | 2011-06-16 19:01:26 +0200 | [diff] [blame] | 647 | [IPSET_ATTR_ETHER] = { .type = NLA_BINARY, |
| 648 | .len = ETH_ALEN }, |
Jozsef Kadlecsik | de76021 | 2011-02-01 15:35:12 +0100 | [diff] [blame] | 649 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 650 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, |
| 651 | }, |
| 652 | .me = THIS_MODULE, |
| 653 | }; |
| 654 | |
| 655 | static int __init |
| 656 | bitmap_ipmac_init(void) |
| 657 | { |
| 658 | return ip_set_type_register(&bitmap_ipmac_type); |
| 659 | } |
| 660 | |
| 661 | static void __exit |
| 662 | bitmap_ipmac_fini(void) |
| 663 | { |
| 664 | ip_set_type_unregister(&bitmap_ipmac_type); |
| 665 | } |
| 666 | |
| 667 | module_init(bitmap_ipmac_init); |
| 668 | module_exit(bitmap_ipmac_fini); |