Commit | Line | Data |
---|---|---|
d15c345f PM |
1 | /* |
2 | * NetLabel Management Support | |
3 | * | |
4 | * This file defines the management functions for the NetLabel system. The | |
5 | * NetLabel system manages static and dynamic label mappings for network | |
6 | * protocols such as CIPSO and RIPSO. | |
7 | * | |
82c21bfa | 8 | * Author: Paul Moore <paul@paul-moore.com> |
d15c345f PM |
9 | * |
10 | */ | |
11 | ||
12 | /* | |
63c41688 | 13 | * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 |
d15c345f PM |
14 | * |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
17 | * the Free Software Foundation; either version 2 of the License, or | |
18 | * (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
23 | * the GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
d484ff15 | 26 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
d15c345f PM |
27 | * |
28 | */ | |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/socket.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/skbuff.h> | |
63c41688 PM |
34 | #include <linux/in.h> |
35 | #include <linux/in6.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
d15c345f PM |
37 | #include <net/sock.h> |
38 | #include <net/netlink.h> | |
39 | #include <net/genetlink.h> | |
63c41688 PM |
40 | #include <net/ip.h> |
41 | #include <net/ipv6.h> | |
d15c345f PM |
42 | #include <net/netlabel.h> |
43 | #include <net/cipso_ipv4.h> | |
60063497 | 44 | #include <linux/atomic.h> |
d15c345f PM |
45 | |
46 | #include "netlabel_domainhash.h" | |
47 | #include "netlabel_user.h" | |
48 | #include "netlabel_mgmt.h" | |
49 | ||
c783f1ce PM |
50 | /* NetLabel configured protocol counter */ |
51 | atomic_t netlabel_mgmt_protocount = ATOMIC_INIT(0); | |
23bcdc1a | 52 | |
fd385855 PM |
53 | /* Argument struct for netlbl_domhsh_walk() */ |
54 | struct netlbl_domhsh_walk_arg { | |
55 | struct netlink_callback *nl_cb; | |
56 | struct sk_buff *skb; | |
57 | u32 seq; | |
58 | }; | |
59 | ||
d15c345f PM |
60 | /* NetLabel Generic NETLINK CIPSOv4 family */ |
61 | static struct genl_family netlbl_mgmt_gnl_family = { | |
62 | .id = GENL_ID_GENERATE, | |
63 | .hdrsize = 0, | |
64 | .name = NETLBL_NLTYPE_MGMT_NAME, | |
65 | .version = NETLBL_PROTO_VERSION, | |
fd385855 | 66 | .maxattr = NLBL_MGMT_A_MAX, |
d15c345f PM |
67 | }; |
68 | ||
fd385855 | 69 | /* NetLabel Netlink attribute policy */ |
ef7c79ed | 70 | static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = { |
fd385855 PM |
71 | [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING }, |
72 | [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 }, | |
73 | [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 }, | |
74 | [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 }, | |
75 | }; | |
d15c345f PM |
76 | |
77 | /* | |
63c41688 | 78 | * Helper Functions |
d15c345f PM |
79 | */ |
80 | ||
81 | /** | |
82 | * netlbl_mgmt_add - Handle an ADD message | |
d15c345f | 83 | * @info: the Generic NETLINK info block |
63c41688 | 84 | * @audit_info: NetLabel audit information |
d15c345f PM |
85 | * |
86 | * Description: | |
63c41688 PM |
87 | * Helper function for the ADD and ADDDEF messages to add the domain mappings |
88 | * from the message to the hash table. See netlabel.h for a description of the | |
89 | * message format. Returns zero on success, negative values on failure. | |
d15c345f PM |
90 | * |
91 | */ | |
63c41688 PM |
92 | static int netlbl_mgmt_add_common(struct genl_info *info, |
93 | struct netlbl_audit *audit_info) | |
d15c345f PM |
94 | { |
95 | int ret_val = -EINVAL; | |
d15c345f | 96 | struct netlbl_dom_map *entry = NULL; |
63c41688 PM |
97 | struct netlbl_domaddr_map *addrmap = NULL; |
98 | struct cipso_v4_doi *cipsov4 = NULL; | |
d15c345f | 99 | u32 tmp_val; |
95d4e6be | 100 | |
fd385855 PM |
101 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
102 | if (entry == NULL) { | |
103 | ret_val = -ENOMEM; | |
104 | goto add_failure; | |
105 | } | |
6a8b7f0c | 106 | entry->def.type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); |
63c41688 PM |
107 | if (info->attrs[NLBL_MGMT_A_DOMAIN]) { |
108 | size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]); | |
109 | entry->domain = kmalloc(tmp_size, GFP_KERNEL); | |
110 | if (entry->domain == NULL) { | |
111 | ret_val = -ENOMEM; | |
112 | goto add_failure; | |
113 | } | |
114 | nla_strlcpy(entry->domain, | |
115 | info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size); | |
116 | } | |
117 | ||
6a8b7f0c | 118 | /* NOTE: internally we allow/use a entry->def.type value of |
63c41688 PM |
119 | * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users |
120 | * to pass that as a protocol value because we need to know the | |
121 | * "real" protocol */ | |
d15c345f | 122 | |
6a8b7f0c | 123 | switch (entry->def.type) { |
fd385855 | 124 | case NETLBL_NLTYPE_UNLABELED: |
fd385855 PM |
125 | break; |
126 | case NETLBL_NLTYPE_CIPSOV4: | |
127 | if (!info->attrs[NLBL_MGMT_A_CV4DOI]) | |
d15c345f | 128 | goto add_failure; |
d15c345f | 129 | |
fd385855 | 130 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]); |
63c41688 PM |
131 | cipsov4 = cipso_v4_doi_getdef(tmp_val); |
132 | if (cipsov4 == NULL) | |
d15c345f | 133 | goto add_failure; |
6a8b7f0c | 134 | entry->def.cipso = cipsov4; |
fd385855 PM |
135 | break; |
136 | default: | |
137 | goto add_failure; | |
d15c345f | 138 | } |
63c41688 PM |
139 | |
140 | if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) { | |
141 | struct in_addr *addr; | |
142 | struct in_addr *mask; | |
143 | struct netlbl_domaddr4_map *map; | |
144 | ||
145 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
146 | if (addrmap == NULL) { | |
147 | ret_val = -ENOMEM; | |
148 | goto add_failure; | |
149 | } | |
150 | INIT_LIST_HEAD(&addrmap->list4); | |
151 | INIT_LIST_HEAD(&addrmap->list6); | |
152 | ||
153 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) != | |
154 | sizeof(struct in_addr)) { | |
155 | ret_val = -EINVAL; | |
156 | goto add_failure; | |
157 | } | |
158 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) != | |
159 | sizeof(struct in_addr)) { | |
160 | ret_val = -EINVAL; | |
161 | goto add_failure; | |
162 | } | |
163 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]); | |
164 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]); | |
165 | ||
166 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
167 | if (map == NULL) { | |
168 | ret_val = -ENOMEM; | |
169 | goto add_failure; | |
170 | } | |
171 | map->list.addr = addr->s_addr & mask->s_addr; | |
172 | map->list.mask = mask->s_addr; | |
173 | map->list.valid = 1; | |
6a8b7f0c | 174 | map->def.type = entry->def.type; |
63c41688 | 175 | if (cipsov4) |
6a8b7f0c | 176 | map->def.cipso = cipsov4; |
63c41688 PM |
177 | |
178 | ret_val = netlbl_af4list_add(&map->list, &addrmap->list4); | |
179 | if (ret_val != 0) { | |
180 | kfree(map); | |
181 | goto add_failure; | |
182 | } | |
183 | ||
6a8b7f0c PM |
184 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
185 | entry->def.addrsel = addrmap; | |
dfd56b8b | 186 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
187 | } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) { |
188 | struct in6_addr *addr; | |
189 | struct in6_addr *mask; | |
190 | struct netlbl_domaddr6_map *map; | |
191 | ||
192 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
193 | if (addrmap == NULL) { | |
194 | ret_val = -ENOMEM; | |
195 | goto add_failure; | |
196 | } | |
197 | INIT_LIST_HEAD(&addrmap->list4); | |
198 | INIT_LIST_HEAD(&addrmap->list6); | |
199 | ||
200 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) != | |
201 | sizeof(struct in6_addr)) { | |
202 | ret_val = -EINVAL; | |
203 | goto add_failure; | |
204 | } | |
205 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) != | |
206 | sizeof(struct in6_addr)) { | |
207 | ret_val = -EINVAL; | |
208 | goto add_failure; | |
209 | } | |
210 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]); | |
211 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]); | |
212 | ||
213 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
214 | if (map == NULL) { | |
215 | ret_val = -ENOMEM; | |
216 | goto add_failure; | |
217 | } | |
4e3fd7a0 | 218 | map->list.addr = *addr; |
63c41688 PM |
219 | map->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; |
220 | map->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; | |
221 | map->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; | |
222 | map->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; | |
4e3fd7a0 | 223 | map->list.mask = *mask; |
63c41688 | 224 | map->list.valid = 1; |
6a8b7f0c | 225 | map->def.type = entry->def.type; |
63c41688 PM |
226 | |
227 | ret_val = netlbl_af6list_add(&map->list, &addrmap->list6); | |
228 | if (ret_val != 0) { | |
229 | kfree(map); | |
230 | goto add_failure; | |
231 | } | |
232 | ||
6a8b7f0c PM |
233 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
234 | entry->def.addrsel = addrmap; | |
63c41688 PM |
235 | #endif /* IPv6 */ |
236 | } | |
237 | ||
238 | ret_val = netlbl_domhsh_add(entry, audit_info); | |
fd385855 PM |
239 | if (ret_val != 0) |
240 | goto add_failure; | |
d15c345f | 241 | |
d15c345f PM |
242 | return 0; |
243 | ||
244 | add_failure: | |
63c41688 PM |
245 | if (cipsov4) |
246 | cipso_v4_doi_putdef(cipsov4); | |
d15c345f PM |
247 | if (entry) |
248 | kfree(entry->domain); | |
63c41688 | 249 | kfree(addrmap); |
d15c345f | 250 | kfree(entry); |
d15c345f PM |
251 | return ret_val; |
252 | } | |
253 | ||
63c41688 PM |
254 | /** |
255 | * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry | |
256 | * @skb: the NETLINK buffer | |
257 | * @entry: the map entry | |
258 | * | |
259 | * Description: | |
260 | * This function is a helper function used by the LISTALL and LISTDEF command | |
25985edc | 261 | * handlers. The caller is responsible for ensuring that the RCU read lock |
63c41688 PM |
262 | * is held. Returns zero on success, negative values on failure. |
263 | * | |
264 | */ | |
265 | static int netlbl_mgmt_listentry(struct sk_buff *skb, | |
266 | struct netlbl_dom_map *entry) | |
267 | { | |
f8a02479 | 268 | int ret_val = 0; |
63c41688 PM |
269 | struct nlattr *nla_a; |
270 | struct nlattr *nla_b; | |
271 | struct netlbl_af4list *iter4; | |
dfd56b8b | 272 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
273 | struct netlbl_af6list *iter6; |
274 | #endif | |
275 | ||
276 | if (entry->domain != NULL) { | |
277 | ret_val = nla_put_string(skb, | |
278 | NLBL_MGMT_A_DOMAIN, entry->domain); | |
279 | if (ret_val != 0) | |
280 | return ret_val; | |
281 | } | |
282 | ||
6a8b7f0c | 283 | switch (entry->def.type) { |
63c41688 PM |
284 | case NETLBL_NLTYPE_ADDRSELECT: |
285 | nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST); | |
286 | if (nla_a == NULL) | |
287 | return -ENOMEM; | |
288 | ||
6a8b7f0c | 289 | netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) { |
63c41688 PM |
290 | struct netlbl_domaddr4_map *map4; |
291 | struct in_addr addr_struct; | |
292 | ||
293 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
294 | if (nla_b == NULL) | |
295 | return -ENOMEM; | |
296 | ||
297 | addr_struct.s_addr = iter4->addr; | |
298 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV4ADDR, | |
299 | sizeof(struct in_addr), | |
300 | &addr_struct); | |
301 | if (ret_val != 0) | |
302 | return ret_val; | |
303 | addr_struct.s_addr = iter4->mask; | |
304 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV4MASK, | |
305 | sizeof(struct in_addr), | |
306 | &addr_struct); | |
307 | if (ret_val != 0) | |
308 | return ret_val; | |
309 | map4 = netlbl_domhsh_addr4_entry(iter4); | |
310 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 311 | map4->def.type); |
63c41688 PM |
312 | if (ret_val != 0) |
313 | return ret_val; | |
6a8b7f0c | 314 | switch (map4->def.type) { |
63c41688 PM |
315 | case NETLBL_NLTYPE_CIPSOV4: |
316 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 317 | map4->def.cipso->doi); |
63c41688 PM |
318 | if (ret_val != 0) |
319 | return ret_val; | |
320 | break; | |
321 | } | |
322 | ||
323 | nla_nest_end(skb, nla_b); | |
324 | } | |
dfd56b8b | 325 | #if IS_ENABLED(CONFIG_IPV6) |
6a8b7f0c | 326 | netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { |
63c41688 PM |
327 | struct netlbl_domaddr6_map *map6; |
328 | ||
329 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
330 | if (nla_b == NULL) | |
331 | return -ENOMEM; | |
332 | ||
333 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR, | |
334 | sizeof(struct in6_addr), | |
335 | &iter6->addr); | |
336 | if (ret_val != 0) | |
337 | return ret_val; | |
338 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK, | |
339 | sizeof(struct in6_addr), | |
340 | &iter6->mask); | |
341 | if (ret_val != 0) | |
342 | return ret_val; | |
343 | map6 = netlbl_domhsh_addr6_entry(iter6); | |
344 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 345 | map6->def.type); |
63c41688 PM |
346 | if (ret_val != 0) |
347 | return ret_val; | |
348 | ||
349 | nla_nest_end(skb, nla_b); | |
350 | } | |
351 | #endif /* IPv6 */ | |
352 | ||
353 | nla_nest_end(skb, nla_a); | |
354 | break; | |
355 | case NETLBL_NLTYPE_UNLABELED: | |
6a8b7f0c | 356 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
357 | break; |
358 | case NETLBL_NLTYPE_CIPSOV4: | |
6a8b7f0c | 359 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
360 | if (ret_val != 0) |
361 | return ret_val; | |
362 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 363 | entry->def.cipso->doi); |
63c41688 PM |
364 | break; |
365 | } | |
366 | ||
367 | return ret_val; | |
368 | } | |
369 | ||
370 | /* | |
371 | * NetLabel Command Handlers | |
372 | */ | |
373 | ||
374 | /** | |
375 | * netlbl_mgmt_add - Handle an ADD message | |
376 | * @skb: the NETLINK buffer | |
377 | * @info: the Generic NETLINK info block | |
378 | * | |
379 | * Description: | |
380 | * Process a user generated ADD message and add the domains from the message | |
381 | * to the hash table. See netlabel.h for a description of the message format. | |
382 | * Returns zero on success, negative values on failure. | |
383 | * | |
384 | */ | |
385 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) | |
386 | { | |
387 | struct netlbl_audit audit_info; | |
388 | ||
389 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || | |
390 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || | |
391 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
392 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
393 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
394 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
395 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
396 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
397 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
398 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
399 | return -EINVAL; | |
400 | ||
401 | netlbl_netlink_auditinfo(skb, &audit_info); | |
402 | ||
403 | return netlbl_mgmt_add_common(info, &audit_info); | |
404 | } | |
405 | ||
d15c345f PM |
406 | /** |
407 | * netlbl_mgmt_remove - Handle a REMOVE message | |
408 | * @skb: the NETLINK buffer | |
409 | * @info: the Generic NETLINK info block | |
410 | * | |
411 | * Description: | |
412 | * Process a user generated REMOVE message and remove the specified domain | |
413 | * mappings. Returns zero on success, negative values on failure. | |
414 | * | |
415 | */ | |
416 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) | |
417 | { | |
fd385855 | 418 | char *domain; |
95d4e6be | 419 | struct netlbl_audit audit_info; |
d15c345f | 420 | |
fd385855 PM |
421 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
422 | return -EINVAL; | |
d15c345f | 423 | |
95d4e6be PM |
424 | netlbl_netlink_auditinfo(skb, &audit_info); |
425 | ||
fd385855 | 426 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
95d4e6be | 427 | return netlbl_domhsh_remove(domain, &audit_info); |
fd385855 PM |
428 | } |
429 | ||
430 | /** | |
431 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL | |
432 | * @entry: the domain mapping hash table entry | |
433 | * @arg: the netlbl_domhsh_walk_arg structure | |
434 | * | |
435 | * Description: | |
436 | * This function is designed to be used as a callback to the | |
437 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL | |
438 | * message. Returns the size of the message on success, negative values on | |
439 | * failure. | |
440 | * | |
441 | */ | |
442 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) | |
443 | { | |
444 | int ret_val = -ENOMEM; | |
445 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
446 | void *data; | |
447 | ||
15e47304 | 448 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, |
17c157c8 TG |
449 | cb_arg->seq, &netlbl_mgmt_gnl_family, |
450 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); | |
fd385855 PM |
451 | if (data == NULL) |
452 | goto listall_cb_failure; | |
453 | ||
63c41688 | 454 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
fd385855 PM |
455 | if (ret_val != 0) |
456 | goto listall_cb_failure; | |
d15c345f | 457 | |
fd385855 PM |
458 | cb_arg->seq++; |
459 | return genlmsg_end(cb_arg->skb, data); | |
d15c345f | 460 | |
fd385855 PM |
461 | listall_cb_failure: |
462 | genlmsg_cancel(cb_arg->skb, data); | |
d15c345f PM |
463 | return ret_val; |
464 | } | |
465 | ||
466 | /** | |
fd385855 | 467 | * netlbl_mgmt_listall - Handle a LISTALL message |
d15c345f | 468 | * @skb: the NETLINK buffer |
fd385855 | 469 | * @cb: the NETLINK callback |
d15c345f PM |
470 | * |
471 | * Description: | |
fd385855 PM |
472 | * Process a user generated LISTALL message and dumps the domain hash table in |
473 | * a form suitable for use in a kernel generated LISTALL message. Returns zero | |
474 | * on success, negative values on failure. | |
d15c345f PM |
475 | * |
476 | */ | |
fd385855 PM |
477 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
478 | struct netlink_callback *cb) | |
d15c345f | 479 | { |
fd385855 PM |
480 | struct netlbl_domhsh_walk_arg cb_arg; |
481 | u32 skip_bkt = cb->args[0]; | |
482 | u32 skip_chain = cb->args[1]; | |
483 | ||
484 | cb_arg.nl_cb = cb; | |
485 | cb_arg.skb = skb; | |
486 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
487 | ||
488 | netlbl_domhsh_walk(&skip_bkt, | |
489 | &skip_chain, | |
490 | netlbl_mgmt_listall_cb, | |
491 | &cb_arg); | |
492 | ||
493 | cb->args[0] = skip_bkt; | |
494 | cb->args[1] = skip_chain; | |
495 | return skb->len; | |
d15c345f PM |
496 | } |
497 | ||
498 | /** | |
499 | * netlbl_mgmt_adddef - Handle an ADDDEF message | |
500 | * @skb: the NETLINK buffer | |
501 | * @info: the Generic NETLINK info block | |
502 | * | |
503 | * Description: | |
504 | * Process a user generated ADDDEF message and respond accordingly. Returns | |
505 | * zero on success, negative values on failure. | |
506 | * | |
507 | */ | |
508 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) | |
509 | { | |
95d4e6be | 510 | struct netlbl_audit audit_info; |
d15c345f | 511 | |
63c41688 PM |
512 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
513 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
514 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
515 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
516 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
517 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
518 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
519 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
520 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
521 | return -EINVAL; | |
d15c345f | 522 | |
95d4e6be PM |
523 | netlbl_netlink_auditinfo(skb, &audit_info); |
524 | ||
63c41688 | 525 | return netlbl_mgmt_add_common(info, &audit_info); |
d15c345f PM |
526 | } |
527 | ||
528 | /** | |
529 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message | |
530 | * @skb: the NETLINK buffer | |
531 | * @info: the Generic NETLINK info block | |
532 | * | |
533 | * Description: | |
534 | * Process a user generated REMOVEDEF message and remove the default domain | |
535 | * mapping. Returns zero on success, negative values on failure. | |
536 | * | |
537 | */ | |
538 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) | |
539 | { | |
95d4e6be PM |
540 | struct netlbl_audit audit_info; |
541 | ||
542 | netlbl_netlink_auditinfo(skb, &audit_info); | |
543 | ||
544 | return netlbl_domhsh_remove_default(&audit_info); | |
d15c345f PM |
545 | } |
546 | ||
547 | /** | |
548 | * netlbl_mgmt_listdef - Handle a LISTDEF message | |
549 | * @skb: the NETLINK buffer | |
550 | * @info: the Generic NETLINK info block | |
551 | * | |
552 | * Description: | |
553 | * Process a user generated LISTDEF message and dumps the default domain | |
554 | * mapping in a form suitable for use in a kernel generated LISTDEF message. | |
555 | * Returns zero on success, negative values on failure. | |
556 | * | |
557 | */ | |
558 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) | |
559 | { | |
560 | int ret_val = -ENOMEM; | |
fd385855 PM |
561 | struct sk_buff *ans_skb = NULL; |
562 | void *data; | |
563 | struct netlbl_dom_map *entry; | |
d15c345f | 564 | |
339bf98f | 565 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 566 | if (ans_skb == NULL) |
fd385855 | 567 | return -ENOMEM; |
17c157c8 TG |
568 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
569 | 0, NLBL_MGMT_C_LISTDEF); | |
fd385855 | 570 | if (data == NULL) |
d15c345f | 571 | goto listdef_failure; |
d15c345f | 572 | |
fd385855 PM |
573 | rcu_read_lock(); |
574 | entry = netlbl_domhsh_getentry(NULL); | |
575 | if (entry == NULL) { | |
576 | ret_val = -ENOENT; | |
577 | goto listdef_failure_lock; | |
578 | } | |
63c41688 | 579 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
fd385855 | 580 | rcu_read_unlock(); |
63c41688 PM |
581 | if (ret_val != 0) |
582 | goto listdef_failure; | |
d15c345f | 583 | |
fd385855 | 584 | genlmsg_end(ans_skb, data); |
fe785bee | 585 | return genlmsg_reply(ans_skb, info); |
d15c345f | 586 | |
fd385855 PM |
587 | listdef_failure_lock: |
588 | rcu_read_unlock(); | |
d15c345f | 589 | listdef_failure: |
fd385855 | 590 | kfree_skb(ans_skb); |
d15c345f PM |
591 | return ret_val; |
592 | } | |
593 | ||
594 | /** | |
fd385855 PM |
595 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
596 | * @skb: the skb to write to | |
fd385855 PM |
597 | * @cb: the NETLINK callback |
598 | * @protocol: the NetLabel protocol to use in the message | |
d15c345f PM |
599 | * |
600 | * Description: | |
fd385855 PM |
601 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
602 | * answer a application's PROTOCOLS message. Returns the size of the message | |
603 | * on success, negative values on failure. | |
d15c345f PM |
604 | * |
605 | */ | |
fd385855 PM |
606 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
607 | struct netlink_callback *cb, | |
608 | u32 protocol) | |
d15c345f PM |
609 | { |
610 | int ret_val = -ENOMEM; | |
fd385855 PM |
611 | void *data; |
612 | ||
15e47304 | 613 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
17c157c8 TG |
614 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, |
615 | NLBL_MGMT_C_PROTOCOLS); | |
fd385855 PM |
616 | if (data == NULL) |
617 | goto protocols_cb_failure; | |
618 | ||
619 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); | |
d15c345f | 620 | if (ret_val != 0) |
fd385855 | 621 | goto protocols_cb_failure; |
d15c345f | 622 | |
fd385855 | 623 | return genlmsg_end(skb, data); |
d15c345f | 624 | |
fd385855 PM |
625 | protocols_cb_failure: |
626 | genlmsg_cancel(skb, data); | |
d15c345f PM |
627 | return ret_val; |
628 | } | |
629 | ||
fd385855 PM |
630 | /** |
631 | * netlbl_mgmt_protocols - Handle a PROTOCOLS message | |
632 | * @skb: the NETLINK buffer | |
633 | * @cb: the NETLINK callback | |
634 | * | |
635 | * Description: | |
636 | * Process a user generated PROTOCOLS message and respond accordingly. | |
637 | * | |
638 | */ | |
639 | static int netlbl_mgmt_protocols(struct sk_buff *skb, | |
640 | struct netlink_callback *cb) | |
641 | { | |
642 | u32 protos_sent = cb->args[0]; | |
643 | ||
644 | if (protos_sent == 0) { | |
645 | if (netlbl_mgmt_protocols_cb(skb, | |
646 | cb, | |
647 | NETLBL_NLTYPE_UNLABELED) < 0) | |
648 | goto protocols_return; | |
649 | protos_sent++; | |
650 | } | |
651 | if (protos_sent == 1) { | |
652 | if (netlbl_mgmt_protocols_cb(skb, | |
653 | cb, | |
654 | NETLBL_NLTYPE_CIPSOV4) < 0) | |
655 | goto protocols_return; | |
656 | protos_sent++; | |
657 | } | |
658 | ||
659 | protocols_return: | |
660 | cb->args[0] = protos_sent; | |
661 | return skb->len; | |
662 | } | |
663 | ||
d15c345f PM |
664 | /** |
665 | * netlbl_mgmt_version - Handle a VERSION message | |
666 | * @skb: the NETLINK buffer | |
667 | * @info: the Generic NETLINK info block | |
668 | * | |
669 | * Description: | |
670 | * Process a user generated VERSION message and respond accordingly. Returns | |
671 | * zero on success, negative values on failure. | |
672 | * | |
673 | */ | |
674 | static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info) | |
675 | { | |
676 | int ret_val = -ENOMEM; | |
677 | struct sk_buff *ans_skb = NULL; | |
fd385855 | 678 | void *data; |
d15c345f | 679 | |
339bf98f | 680 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 681 | if (ans_skb == NULL) |
fd385855 | 682 | return -ENOMEM; |
17c157c8 TG |
683 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
684 | 0, NLBL_MGMT_C_VERSION); | |
fd385855 | 685 | if (data == NULL) |
d15c345f PM |
686 | goto version_failure; |
687 | ||
fd385855 PM |
688 | ret_val = nla_put_u32(ans_skb, |
689 | NLBL_MGMT_A_VERSION, | |
690 | NETLBL_PROTO_VERSION); | |
d15c345f PM |
691 | if (ret_val != 0) |
692 | goto version_failure; | |
693 | ||
fd385855 | 694 | genlmsg_end(ans_skb, data); |
fe785bee | 695 | return genlmsg_reply(ans_skb, info); |
d15c345f PM |
696 | |
697 | version_failure: | |
698 | kfree_skb(ans_skb); | |
d15c345f PM |
699 | return ret_val; |
700 | } | |
701 | ||
702 | ||
703 | /* | |
704 | * NetLabel Generic NETLINK Command Definitions | |
705 | */ | |
706 | ||
4534de83 | 707 | static const struct genl_ops netlbl_mgmt_genl_ops[] = { |
227c43c3 | 708 | { |
d15c345f | 709 | .cmd = NLBL_MGMT_C_ADD, |
fd385855 PM |
710 | .flags = GENL_ADMIN_PERM, |
711 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
712 | .doit = netlbl_mgmt_add, |
713 | .dumpit = NULL, | |
227c43c3 PE |
714 | }, |
715 | { | |
d15c345f | 716 | .cmd = NLBL_MGMT_C_REMOVE, |
fd385855 PM |
717 | .flags = GENL_ADMIN_PERM, |
718 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
719 | .doit = netlbl_mgmt_remove, |
720 | .dumpit = NULL, | |
227c43c3 PE |
721 | }, |
722 | { | |
fd385855 | 723 | .cmd = NLBL_MGMT_C_LISTALL, |
d15c345f | 724 | .flags = 0, |
fd385855 PM |
725 | .policy = netlbl_mgmt_genl_policy, |
726 | .doit = NULL, | |
727 | .dumpit = netlbl_mgmt_listall, | |
227c43c3 PE |
728 | }, |
729 | { | |
d15c345f | 730 | .cmd = NLBL_MGMT_C_ADDDEF, |
fd385855 PM |
731 | .flags = GENL_ADMIN_PERM, |
732 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
733 | .doit = netlbl_mgmt_adddef, |
734 | .dumpit = NULL, | |
227c43c3 PE |
735 | }, |
736 | { | |
d15c345f | 737 | .cmd = NLBL_MGMT_C_REMOVEDEF, |
fd385855 PM |
738 | .flags = GENL_ADMIN_PERM, |
739 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
740 | .doit = netlbl_mgmt_removedef, |
741 | .dumpit = NULL, | |
227c43c3 PE |
742 | }, |
743 | { | |
d15c345f PM |
744 | .cmd = NLBL_MGMT_C_LISTDEF, |
745 | .flags = 0, | |
fd385855 | 746 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
747 | .doit = netlbl_mgmt_listdef, |
748 | .dumpit = NULL, | |
227c43c3 PE |
749 | }, |
750 | { | |
fd385855 | 751 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
d15c345f | 752 | .flags = 0, |
fd385855 PM |
753 | .policy = netlbl_mgmt_genl_policy, |
754 | .doit = NULL, | |
755 | .dumpit = netlbl_mgmt_protocols, | |
227c43c3 PE |
756 | }, |
757 | { | |
d15c345f PM |
758 | .cmd = NLBL_MGMT_C_VERSION, |
759 | .flags = 0, | |
fd385855 | 760 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
761 | .doit = netlbl_mgmt_version, |
762 | .dumpit = NULL, | |
227c43c3 | 763 | }, |
d15c345f PM |
764 | }; |
765 | ||
766 | /* | |
767 | * NetLabel Generic NETLINK Protocol Functions | |
768 | */ | |
769 | ||
770 | /** | |
771 | * netlbl_mgmt_genl_init - Register the NetLabel management component | |
772 | * | |
773 | * Description: | |
774 | * Register the NetLabel management component with the Generic NETLINK | |
775 | * mechanism. Returns zero on success, negative values on failure. | |
776 | * | |
777 | */ | |
05705e4e | 778 | int __init netlbl_mgmt_genl_init(void) |
d15c345f | 779 | { |
7ae740df | 780 | return genl_register_family_with_ops(&netlbl_mgmt_gnl_family, |
c53ed742 | 781 | netlbl_mgmt_genl_ops); |
d15c345f | 782 | } |