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de76021a JK |
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> | |
de76021a JK |
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 | ||
29 | MODULE_LICENSE("GPL"); | |
30 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); | |
31 | MODULE_DESCRIPTION("bitmap:ip,mac type of IP sets"); | |
32 | MODULE_ALIAS("ip_set_bitmap:ip,mac"); | |
33 | ||
34 | enum { | |
35 | MAC_EMPTY, /* element is not set */ | |
36 | MAC_FILLED, /* element is set with MAC */ | |
37 | MAC_UNSET, /* element is set, without MAC */ | |
38 | }; | |
39 | ||
40 | /* Type structure */ | |
41 | struct bitmap_ipmac { | |
42 | void *members; /* the set members */ | |
43 | u32 first_ip; /* host byte order, included in range */ | |
44 | u32 last_ip; /* host byte order, included in range */ | |
45 | u32 timeout; /* timeout value */ | |
46 | struct timer_list gc; /* garbage collector */ | |
47 | size_t dsize; /* size of element */ | |
48 | }; | |
49 | ||
50 | /* ADT structure for generic function args */ | |
51 | struct ipmac { | |
52 | u32 id; /* id in array */ | |
53 | unsigned char *ether; /* ethernet address */ | |
54 | }; | |
55 | ||
56 | /* Member element without and with timeout */ | |
57 | ||
58 | struct ipmac_elem { | |
59 | unsigned char ether[ETH_ALEN]; | |
60 | unsigned char match; | |
61 | } __attribute__ ((aligned)); | |
62 | ||
63 | struct ipmac_telem { | |
64 | unsigned char ether[ETH_ALEN]; | |
65 | unsigned char match; | |
66 | unsigned long timeout; | |
67 | } __attribute__ ((aligned)); | |
68 | ||
69 | static inline void * | |
70 | bitmap_ipmac_elem(const struct bitmap_ipmac *map, u32 id) | |
71 | { | |
72 | return (void *)((char *)map->members + id * map->dsize); | |
73 | } | |
74 | ||
75 | static inline bool | |
76 | bitmap_timeout(const struct bitmap_ipmac *map, u32 id) | |
77 | { | |
78 | const struct ipmac_telem *elem = bitmap_ipmac_elem(map, id); | |
79 | ||
80 | return ip_set_timeout_test(elem->timeout); | |
81 | } | |
82 | ||
83 | static inline bool | |
84 | bitmap_expired(const struct bitmap_ipmac *map, u32 id) | |
85 | { | |
86 | const struct ipmac_telem *elem = bitmap_ipmac_elem(map, id); | |
87 | ||
88 | return ip_set_timeout_expired(elem->timeout); | |
89 | } | |
90 | ||
91 | static inline int | |
92 | bitmap_ipmac_exist(const struct ipmac_telem *elem) | |
93 | { | |
94 | return elem->match == MAC_UNSET || | |
95 | (elem->match == MAC_FILLED && | |
96 | !ip_set_timeout_expired(elem->timeout)); | |
97 | } | |
98 | ||
99 | /* Base variant */ | |
100 | ||
101 | static int | |
5416219e | 102 | bitmap_ipmac_test(struct ip_set *set, void *value, u32 timeout, u32 flags) |
de76021a JK |
103 | { |
104 | const struct bitmap_ipmac *map = set->data; | |
105 | const struct ipmac *data = value; | |
106 | const struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); | |
107 | ||
108 | switch (elem->match) { | |
109 | case MAC_UNSET: | |
110 | /* Trigger kernel to fill out the ethernet address */ | |
111 | return -EAGAIN; | |
112 | case MAC_FILLED: | |
113 | return data->ether == NULL || | |
114 | compare_ether_addr(data->ether, elem->ether) == 0; | |
115 | } | |
116 | return 0; | |
117 | } | |
118 | ||
119 | static int | |
5416219e | 120 | bitmap_ipmac_add(struct ip_set *set, void *value, u32 timeout, u32 flags) |
de76021a JK |
121 | { |
122 | struct bitmap_ipmac *map = set->data; | |
123 | const struct ipmac *data = value; | |
124 | struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); | |
125 | ||
126 | switch (elem->match) { | |
127 | case MAC_UNSET: | |
128 | if (!data->ether) | |
129 | /* Already added without ethernet address */ | |
130 | return -IPSET_ERR_EXIST; | |
131 | /* Fill the MAC address */ | |
132 | memcpy(elem->ether, data->ether, ETH_ALEN); | |
133 | elem->match = MAC_FILLED; | |
134 | break; | |
135 | case MAC_FILLED: | |
136 | return -IPSET_ERR_EXIST; | |
137 | case MAC_EMPTY: | |
138 | if (data->ether) { | |
139 | memcpy(elem->ether, data->ether, ETH_ALEN); | |
140 | elem->match = MAC_FILLED; | |
141 | } else | |
142 | elem->match = MAC_UNSET; | |
143 | } | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static int | |
5416219e | 149 | bitmap_ipmac_del(struct ip_set *set, void *value, u32 timeout, u32 flags) |
de76021a JK |
150 | { |
151 | struct bitmap_ipmac *map = set->data; | |
152 | const struct ipmac *data = value; | |
153 | struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); | |
154 | ||
155 | if (elem->match == MAC_EMPTY) | |
156 | return -IPSET_ERR_EXIST; | |
157 | ||
158 | elem->match = MAC_EMPTY; | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static int | |
164 | bitmap_ipmac_list(const struct ip_set *set, | |
165 | struct sk_buff *skb, struct netlink_callback *cb) | |
166 | { | |
167 | const struct bitmap_ipmac *map = set->data; | |
168 | const struct ipmac_elem *elem; | |
169 | struct nlattr *atd, *nested; | |
170 | u32 id, first = cb->args[2]; | |
171 | u32 last = map->last_ip - map->first_ip; | |
172 | ||
173 | atd = ipset_nest_start(skb, IPSET_ATTR_ADT); | |
174 | if (!atd) | |
175 | return -EMSGSIZE; | |
176 | for (; cb->args[2] <= last; cb->args[2]++) { | |
177 | id = cb->args[2]; | |
178 | elem = bitmap_ipmac_elem(map, id); | |
179 | if (elem->match == MAC_EMPTY) | |
180 | continue; | |
181 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); | |
182 | if (!nested) { | |
183 | if (id == first) { | |
184 | nla_nest_cancel(skb, atd); | |
185 | return -EMSGSIZE; | |
186 | } else | |
187 | goto nla_put_failure; | |
188 | } | |
189 | NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, | |
190 | htonl(map->first_ip + id)); | |
191 | if (elem->match == MAC_FILLED) | |
192 | NLA_PUT(skb, IPSET_ATTR_ETHER, ETH_ALEN, | |
193 | elem->ether); | |
194 | ipset_nest_end(skb, nested); | |
195 | } | |
196 | ipset_nest_end(skb, atd); | |
197 | /* Set listing finished */ | |
198 | cb->args[2] = 0; | |
199 | ||
200 | return 0; | |
201 | ||
202 | nla_put_failure: | |
203 | nla_nest_cancel(skb, nested); | |
204 | ipset_nest_end(skb, atd); | |
205 | if (unlikely(id == first)) { | |
206 | cb->args[2] = 0; | |
207 | return -EMSGSIZE; | |
208 | } | |
209 | return 0; | |
210 | } | |
211 | ||
212 | /* Timeout variant */ | |
213 | ||
214 | static int | |
5416219e | 215 | bitmap_ipmac_ttest(struct ip_set *set, void *value, u32 timeout, u32 flags) |
de76021a JK |
216 | { |
217 | const struct bitmap_ipmac *map = set->data; | |
218 | const struct ipmac *data = value; | |
219 | const struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id); | |
220 | ||
221 | switch (elem->match) { | |
222 | case MAC_UNSET: | |
223 | /* Trigger kernel to fill out the ethernet address */ | |
224 | return -EAGAIN; | |
225 | case MAC_FILLED: | |
226 | return (data->ether == NULL || | |
227 | compare_ether_addr(data->ether, elem->ether) == 0) && | |
228 | !bitmap_expired(map, data->id); | |
229 | } | |
230 | return 0; | |
231 | } | |
232 | ||
233 | static int | |
5416219e | 234 | bitmap_ipmac_tadd(struct ip_set *set, void *value, u32 timeout, u32 flags) |
de76021a JK |
235 | { |
236 | struct bitmap_ipmac *map = set->data; | |
237 | const struct ipmac *data = value; | |
238 | struct ipmac_telem *elem = bitmap_ipmac_elem(map, data->id); | |
5416219e | 239 | bool flag_exist = flags & IPSET_FLAG_EXIST; |
de76021a JK |
240 | |
241 | switch (elem->match) { | |
242 | case MAC_UNSET: | |
5416219e | 243 | if (!(data->ether || flag_exist)) |
de76021a JK |
244 | /* Already added without ethernet address */ |
245 | return -IPSET_ERR_EXIST; | |
246 | /* Fill the MAC address and activate the timer */ | |
247 | memcpy(elem->ether, data->ether, ETH_ALEN); | |
248 | elem->match = MAC_FILLED; | |
249 | if (timeout == map->timeout) | |
250 | /* Timeout was not specified, get stored one */ | |
251 | timeout = elem->timeout; | |
252 | elem->timeout = ip_set_timeout_set(timeout); | |
253 | break; | |
254 | case MAC_FILLED: | |
5416219e | 255 | if (!(bitmap_expired(map, data->id) || flag_exist)) |
de76021a JK |
256 | return -IPSET_ERR_EXIST; |
257 | /* Fall through */ | |
258 | case MAC_EMPTY: | |
259 | if (data->ether) { | |
260 | memcpy(elem->ether, data->ether, ETH_ALEN); | |
261 | elem->match = MAC_FILLED; | |
262 | } else | |
263 | elem->match = MAC_UNSET; | |
264 | /* If MAC is unset yet, we store plain timeout value | |
265 | * because the timer is not activated yet | |
266 | * and we can reuse it later when MAC is filled out, | |
267 | * possibly by the kernel */ | |
268 | elem->timeout = data->ether ? ip_set_timeout_set(timeout) | |
269 | : timeout; | |
270 | break; | |
271 | } | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | static int | |
5416219e | 277 | bitmap_ipmac_tdel(struct ip_set *set, void *value, u32 timeout, u32 flags) |
de76021a JK |
278 | { |
279 | struct bitmap_ipmac *map = set->data; | |
280 | const struct ipmac *data = value; | |
281 | struct ipmac_telem *elem = bitmap_ipmac_elem(map, data->id); | |
282 | ||
283 | if (elem->match == MAC_EMPTY || bitmap_expired(map, data->id)) | |
284 | return -IPSET_ERR_EXIST; | |
285 | ||
286 | elem->match = MAC_EMPTY; | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
291 | static int | |
292 | bitmap_ipmac_tlist(const struct ip_set *set, | |
293 | struct sk_buff *skb, struct netlink_callback *cb) | |
294 | { | |
295 | const struct bitmap_ipmac *map = set->data; | |
296 | const struct ipmac_telem *elem; | |
297 | struct nlattr *atd, *nested; | |
298 | u32 id, first = cb->args[2]; | |
299 | u32 timeout, last = map->last_ip - map->first_ip; | |
300 | ||
301 | atd = ipset_nest_start(skb, IPSET_ATTR_ADT); | |
302 | if (!atd) | |
303 | return -EMSGSIZE; | |
304 | for (; cb->args[2] <= last; cb->args[2]++) { | |
305 | id = cb->args[2]; | |
306 | elem = bitmap_ipmac_elem(map, id); | |
307 | if (!bitmap_ipmac_exist(elem)) | |
308 | continue; | |
309 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); | |
310 | if (!nested) { | |
311 | if (id == first) { | |
312 | nla_nest_cancel(skb, atd); | |
313 | return -EMSGSIZE; | |
314 | } else | |
315 | goto nla_put_failure; | |
316 | } | |
317 | NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, | |
318 | htonl(map->first_ip + id)); | |
319 | if (elem->match == MAC_FILLED) | |
320 | NLA_PUT(skb, IPSET_ATTR_ETHER, ETH_ALEN, | |
321 | elem->ether); | |
322 | timeout = elem->match == MAC_UNSET ? elem->timeout | |
323 | : ip_set_timeout_get(elem->timeout); | |
324 | NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(timeout)); | |
325 | ipset_nest_end(skb, nested); | |
326 | } | |
327 | ipset_nest_end(skb, atd); | |
328 | /* Set listing finished */ | |
329 | cb->args[2] = 0; | |
330 | ||
331 | return 0; | |
332 | ||
333 | nla_put_failure: | |
334 | nla_nest_cancel(skb, nested); | |
335 | ipset_nest_end(skb, atd); | |
336 | return -EMSGSIZE; | |
337 | } | |
338 | ||
339 | static int | |
340 | bitmap_ipmac_kadt(struct ip_set *set, const struct sk_buff *skb, | |
b66554cf | 341 | const struct xt_action_param *par, |
ac8cc925 | 342 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
de76021a JK |
343 | { |
344 | struct bitmap_ipmac *map = set->data; | |
345 | ipset_adtfn adtfn = set->variant->adt[adt]; | |
346 | struct ipmac data; | |
347 | ||
0e8a835a | 348 | /* MAC can be src only */ |
ac8cc925 | 349 | if (!(opt->flags & IPSET_DIM_TWO_SRC)) |
0e8a835a JK |
350 | return 0; |
351 | ||
ac8cc925 | 352 | data.id = ntohl(ip4addr(skb, opt->flags & IPSET_DIM_ONE_SRC)); |
de76021a JK |
353 | if (data.id < map->first_ip || data.id > map->last_ip) |
354 | return -IPSET_ERR_BITMAP_RANGE; | |
355 | ||
356 | /* Backward compatibility: we don't check the second flag */ | |
357 | if (skb_mac_header(skb) < skb->head || | |
358 | (skb_mac_header(skb) + ETH_HLEN) > skb->data) | |
359 | return -EINVAL; | |
360 | ||
361 | data.id -= map->first_ip; | |
362 | data.ether = eth_hdr(skb)->h_source; | |
363 | ||
ac8cc925 | 364 | return adtfn(set, &data, opt_timeout(opt, map), opt->cmdflags); |
de76021a JK |
365 | } |
366 | ||
367 | static int | |
368 | bitmap_ipmac_uadt(struct ip_set *set, struct nlattr *tb[], | |
3d14b171 | 369 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
de76021a JK |
370 | { |
371 | const struct bitmap_ipmac *map = set->data; | |
372 | ipset_adtfn adtfn = set->variant->adt[adt]; | |
373 | struct ipmac data; | |
374 | u32 timeout = map->timeout; | |
375 | int ret = 0; | |
376 | ||
377 | if (unlikely(!tb[IPSET_ATTR_IP] || | |
378 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) | |
379 | return -IPSET_ERR_PROTOCOL; | |
380 | ||
381 | if (tb[IPSET_ATTR_LINENO]) | |
382 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); | |
383 | ||
384 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &data.id); | |
385 | if (ret) | |
386 | return ret; | |
387 | ||
388 | if (data.id < map->first_ip || data.id > map->last_ip) | |
389 | return -IPSET_ERR_BITMAP_RANGE; | |
390 | ||
391 | if (tb[IPSET_ATTR_ETHER]) | |
392 | data.ether = nla_data(tb[IPSET_ATTR_ETHER]); | |
393 | else | |
394 | data.ether = NULL; | |
395 | ||
396 | if (tb[IPSET_ATTR_TIMEOUT]) { | |
397 | if (!with_timeout(map->timeout)) | |
398 | return -IPSET_ERR_TIMEOUT; | |
399 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
400 | } | |
401 | ||
402 | data.id -= map->first_ip; | |
403 | ||
5416219e | 404 | ret = adtfn(set, &data, timeout, flags); |
de76021a JK |
405 | |
406 | return ip_set_eexist(ret, flags) ? 0 : ret; | |
407 | } | |
408 | ||
409 | static void | |
410 | bitmap_ipmac_destroy(struct ip_set *set) | |
411 | { | |
412 | struct bitmap_ipmac *map = set->data; | |
413 | ||
414 | if (with_timeout(map->timeout)) | |
415 | del_timer_sync(&map->gc); | |
416 | ||
417 | ip_set_free(map->members); | |
418 | kfree(map); | |
419 | ||
420 | set->data = NULL; | |
421 | } | |
422 | ||
423 | static void | |
424 | bitmap_ipmac_flush(struct ip_set *set) | |
425 | { | |
426 | struct bitmap_ipmac *map = set->data; | |
427 | ||
428 | memset(map->members, 0, | |
429 | (map->last_ip - map->first_ip + 1) * map->dsize); | |
430 | } | |
431 | ||
432 | static int | |
433 | bitmap_ipmac_head(struct ip_set *set, struct sk_buff *skb) | |
434 | { | |
435 | const struct bitmap_ipmac *map = set->data; | |
436 | struct nlattr *nested; | |
437 | ||
438 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); | |
439 | if (!nested) | |
440 | goto nla_put_failure; | |
441 | NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, htonl(map->first_ip)); | |
442 | NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP_TO, htonl(map->last_ip)); | |
6604271c | 443 | NLA_PUT_NET32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref - 1)); |
de76021a JK |
444 | NLA_PUT_NET32(skb, IPSET_ATTR_MEMSIZE, |
445 | htonl(sizeof(*map) | |
446 | + (map->last_ip - map->first_ip + 1) * map->dsize)); | |
447 | if (with_timeout(map->timeout)) | |
448 | NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout)); | |
449 | ipset_nest_end(skb, nested); | |
450 | ||
451 | return 0; | |
452 | nla_put_failure: | |
453 | return -EMSGSIZE; | |
454 | } | |
455 | ||
456 | static bool | |
457 | bitmap_ipmac_same_set(const struct ip_set *a, const struct ip_set *b) | |
458 | { | |
459 | const struct bitmap_ipmac *x = a->data; | |
460 | const struct bitmap_ipmac *y = b->data; | |
461 | ||
462 | return x->first_ip == y->first_ip && | |
463 | x->last_ip == y->last_ip && | |
464 | x->timeout == y->timeout; | |
465 | } | |
466 | ||
467 | static const struct ip_set_type_variant bitmap_ipmac = { | |
468 | .kadt = bitmap_ipmac_kadt, | |
469 | .uadt = bitmap_ipmac_uadt, | |
470 | .adt = { | |
471 | [IPSET_ADD] = bitmap_ipmac_add, | |
472 | [IPSET_DEL] = bitmap_ipmac_del, | |
473 | [IPSET_TEST] = bitmap_ipmac_test, | |
474 | }, | |
475 | .destroy = bitmap_ipmac_destroy, | |
476 | .flush = bitmap_ipmac_flush, | |
477 | .head = bitmap_ipmac_head, | |
478 | .list = bitmap_ipmac_list, | |
479 | .same_set = bitmap_ipmac_same_set, | |
480 | }; | |
481 | ||
482 | static const struct ip_set_type_variant bitmap_tipmac = { | |
483 | .kadt = bitmap_ipmac_kadt, | |
484 | .uadt = bitmap_ipmac_uadt, | |
485 | .adt = { | |
486 | [IPSET_ADD] = bitmap_ipmac_tadd, | |
487 | [IPSET_DEL] = bitmap_ipmac_tdel, | |
488 | [IPSET_TEST] = bitmap_ipmac_ttest, | |
489 | }, | |
490 | .destroy = bitmap_ipmac_destroy, | |
491 | .flush = bitmap_ipmac_flush, | |
492 | .head = bitmap_ipmac_head, | |
493 | .list = bitmap_ipmac_tlist, | |
494 | .same_set = bitmap_ipmac_same_set, | |
495 | }; | |
496 | ||
497 | static void | |
498 | bitmap_ipmac_gc(unsigned long ul_set) | |
499 | { | |
500 | struct ip_set *set = (struct ip_set *) ul_set; | |
501 | struct bitmap_ipmac *map = set->data; | |
502 | struct ipmac_telem *elem; | |
503 | u32 id, last = map->last_ip - map->first_ip; | |
504 | ||
505 | /* We run parallel with other readers (test element) | |
506 | * but adding/deleting new entries is locked out */ | |
507 | read_lock_bh(&set->lock); | |
508 | for (id = 0; id <= last; id++) { | |
509 | elem = bitmap_ipmac_elem(map, id); | |
510 | if (elem->match == MAC_FILLED && | |
511 | ip_set_timeout_expired(elem->timeout)) | |
512 | elem->match = MAC_EMPTY; | |
513 | } | |
514 | read_unlock_bh(&set->lock); | |
515 | ||
516 | map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; | |
517 | add_timer(&map->gc); | |
518 | } | |
519 | ||
520 | static void | |
521 | bitmap_ipmac_gc_init(struct ip_set *set) | |
522 | { | |
523 | struct bitmap_ipmac *map = set->data; | |
524 | ||
525 | init_timer(&map->gc); | |
526 | map->gc.data = (unsigned long) set; | |
527 | map->gc.function = bitmap_ipmac_gc; | |
528 | map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; | |
529 | add_timer(&map->gc); | |
530 | } | |
531 | ||
532 | /* Create bitmap:ip,mac type of sets */ | |
533 | ||
534 | static bool | |
535 | init_map_ipmac(struct ip_set *set, struct bitmap_ipmac *map, | |
536 | u32 first_ip, u32 last_ip) | |
537 | { | |
538 | map->members = ip_set_alloc((last_ip - first_ip + 1) * map->dsize); | |
539 | if (!map->members) | |
540 | return false; | |
541 | map->first_ip = first_ip; | |
542 | map->last_ip = last_ip; | |
543 | map->timeout = IPSET_NO_TIMEOUT; | |
544 | ||
545 | set->data = map; | |
546 | set->family = AF_INET; | |
547 | ||
548 | return true; | |
549 | } | |
550 | ||
551 | static int | |
552 | bitmap_ipmac_create(struct ip_set *set, struct nlattr *tb[], | |
553 | u32 flags) | |
554 | { | |
555 | u32 first_ip, last_ip, elements; | |
556 | struct bitmap_ipmac *map; | |
557 | int ret; | |
558 | ||
559 | if (unlikely(!tb[IPSET_ATTR_IP] || | |
560 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) | |
561 | return -IPSET_ERR_PROTOCOL; | |
562 | ||
563 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &first_ip); | |
564 | if (ret) | |
565 | return ret; | |
566 | ||
567 | if (tb[IPSET_ATTR_IP_TO]) { | |
568 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &last_ip); | |
569 | if (ret) | |
570 | return ret; | |
571 | if (first_ip > last_ip) { | |
572 | u32 tmp = first_ip; | |
573 | ||
574 | first_ip = last_ip; | |
575 | last_ip = tmp; | |
576 | } | |
577 | } else if (tb[IPSET_ATTR_CIDR]) { | |
578 | u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); | |
579 | ||
580 | if (cidr >= 32) | |
581 | return -IPSET_ERR_INVALID_CIDR; | |
e6146e86 | 582 | ip_set_mask_from_to(first_ip, last_ip, cidr); |
de76021a JK |
583 | } else |
584 | return -IPSET_ERR_PROTOCOL; | |
585 | ||
586 | elements = last_ip - first_ip + 1; | |
587 | ||
588 | if (elements > IPSET_BITMAP_MAX_RANGE + 1) | |
589 | return -IPSET_ERR_BITMAP_RANGE_SIZE; | |
590 | ||
591 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
592 | if (!map) | |
593 | return -ENOMEM; | |
594 | ||
595 | if (tb[IPSET_ATTR_TIMEOUT]) { | |
596 | map->dsize = sizeof(struct ipmac_telem); | |
597 | ||
598 | if (!init_map_ipmac(set, map, first_ip, last_ip)) { | |
599 | kfree(map); | |
600 | return -ENOMEM; | |
601 | } | |
602 | ||
603 | map->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
604 | ||
605 | set->variant = &bitmap_tipmac; | |
606 | ||
607 | bitmap_ipmac_gc_init(set); | |
608 | } else { | |
609 | map->dsize = sizeof(struct ipmac_elem); | |
610 | ||
611 | if (!init_map_ipmac(set, map, first_ip, last_ip)) { | |
612 | kfree(map); | |
613 | return -ENOMEM; | |
614 | } | |
615 | set->variant = &bitmap_ipmac; | |
616 | ||
617 | } | |
618 | return 0; | |
619 | } | |
620 | ||
621 | static struct ip_set_type bitmap_ipmac_type = { | |
622 | .name = "bitmap:ip,mac", | |
623 | .protocol = IPSET_PROTOCOL, | |
624 | .features = IPSET_TYPE_IP | IPSET_TYPE_MAC, | |
625 | .dimension = IPSET_DIM_TWO, | |
626 | .family = AF_INET, | |
f1e00b39 JK |
627 | .revision_min = 0, |
628 | .revision_max = 0, | |
de76021a JK |
629 | .create = bitmap_ipmac_create, |
630 | .create_policy = { | |
631 | [IPSET_ATTR_IP] = { .type = NLA_NESTED }, | |
632 | [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED }, | |
633 | [IPSET_ATTR_CIDR] = { .type = NLA_U8 }, | |
634 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
635 | }, | |
636 | .adt_policy = { | |
637 | [IPSET_ATTR_IP] = { .type = NLA_NESTED }, | |
638 | [IPSET_ATTR_ETHER] = { .type = NLA_BINARY, .len = ETH_ALEN }, | |
639 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
640 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, | |
641 | }, | |
642 | .me = THIS_MODULE, | |
643 | }; | |
644 | ||
645 | static int __init | |
646 | bitmap_ipmac_init(void) | |
647 | { | |
648 | return ip_set_type_register(&bitmap_ipmac_type); | |
649 | } | |
650 | ||
651 | static void __exit | |
652 | bitmap_ipmac_fini(void) | |
653 | { | |
654 | ip_set_type_unregister(&bitmap_ipmac_type); | |
655 | } | |
656 | ||
657 | module_init(bitmap_ipmac_init); | |
658 | module_exit(bitmap_ipmac_fini); |