Commit | Line | Data |
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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; | |
63c41688 PM |
96 | struct netlbl_domaddr_map *addrmap = NULL; |
97 | struct cipso_v4_doi *cipsov4 = NULL; | |
d15c345f | 98 | u32 tmp_val; |
4de46d5e | 99 | struct netlbl_dom_map *entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
95d4e6be | 100 | |
4de46d5e ME |
101 | if (!entry) |
102 | return -ENOMEM; | |
6a8b7f0c | 103 | entry->def.type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); |
63c41688 PM |
104 | if (info->attrs[NLBL_MGMT_A_DOMAIN]) { |
105 | size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]); | |
106 | entry->domain = kmalloc(tmp_size, GFP_KERNEL); | |
107 | if (entry->domain == NULL) { | |
108 | ret_val = -ENOMEM; | |
4de46d5e | 109 | goto add_free_entry; |
63c41688 PM |
110 | } |
111 | nla_strlcpy(entry->domain, | |
112 | info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size); | |
113 | } | |
114 | ||
6a8b7f0c | 115 | /* NOTE: internally we allow/use a entry->def.type value of |
63c41688 PM |
116 | * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users |
117 | * to pass that as a protocol value because we need to know the | |
118 | * "real" protocol */ | |
d15c345f | 119 | |
6a8b7f0c | 120 | switch (entry->def.type) { |
fd385855 | 121 | case NETLBL_NLTYPE_UNLABELED: |
fd385855 PM |
122 | break; |
123 | case NETLBL_NLTYPE_CIPSOV4: | |
124 | if (!info->attrs[NLBL_MGMT_A_CV4DOI]) | |
4de46d5e | 125 | goto add_free_domain; |
d15c345f | 126 | |
fd385855 | 127 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]); |
63c41688 PM |
128 | cipsov4 = cipso_v4_doi_getdef(tmp_val); |
129 | if (cipsov4 == NULL) | |
4de46d5e | 130 | goto add_free_domain; |
6a8b7f0c | 131 | entry->def.cipso = cipsov4; |
fd385855 PM |
132 | break; |
133 | default: | |
4de46d5e | 134 | goto add_free_domain; |
d15c345f | 135 | } |
63c41688 PM |
136 | |
137 | if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) { | |
138 | struct in_addr *addr; | |
139 | struct in_addr *mask; | |
140 | struct netlbl_domaddr4_map *map; | |
141 | ||
142 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
143 | if (addrmap == NULL) { | |
144 | ret_val = -ENOMEM; | |
4de46d5e | 145 | goto add_doi_put_def; |
63c41688 PM |
146 | } |
147 | INIT_LIST_HEAD(&addrmap->list4); | |
148 | INIT_LIST_HEAD(&addrmap->list6); | |
149 | ||
150 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) != | |
151 | sizeof(struct in_addr)) { | |
152 | ret_val = -EINVAL; | |
4de46d5e | 153 | goto add_free_addrmap; |
63c41688 PM |
154 | } |
155 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) != | |
156 | sizeof(struct in_addr)) { | |
157 | ret_val = -EINVAL; | |
4de46d5e | 158 | goto add_free_addrmap; |
63c41688 PM |
159 | } |
160 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]); | |
161 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]); | |
162 | ||
163 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
164 | if (map == NULL) { | |
165 | ret_val = -ENOMEM; | |
4de46d5e | 166 | goto add_free_addrmap; |
63c41688 PM |
167 | } |
168 | map->list.addr = addr->s_addr & mask->s_addr; | |
169 | map->list.mask = mask->s_addr; | |
170 | map->list.valid = 1; | |
6a8b7f0c | 171 | map->def.type = entry->def.type; |
63c41688 | 172 | if (cipsov4) |
6a8b7f0c | 173 | map->def.cipso = cipsov4; |
63c41688 PM |
174 | |
175 | ret_val = netlbl_af4list_add(&map->list, &addrmap->list4); | |
176 | if (ret_val != 0) { | |
177 | kfree(map); | |
4de46d5e | 178 | goto add_free_addrmap; |
63c41688 PM |
179 | } |
180 | ||
6a8b7f0c PM |
181 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
182 | entry->def.addrsel = addrmap; | |
dfd56b8b | 183 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
184 | } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) { |
185 | struct in6_addr *addr; | |
186 | struct in6_addr *mask; | |
187 | struct netlbl_domaddr6_map *map; | |
188 | ||
189 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
190 | if (addrmap == NULL) { | |
191 | ret_val = -ENOMEM; | |
4de46d5e | 192 | goto add_doi_put_def; |
63c41688 PM |
193 | } |
194 | INIT_LIST_HEAD(&addrmap->list4); | |
195 | INIT_LIST_HEAD(&addrmap->list6); | |
196 | ||
197 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) != | |
198 | sizeof(struct in6_addr)) { | |
199 | ret_val = -EINVAL; | |
4de46d5e | 200 | goto add_free_addrmap; |
63c41688 PM |
201 | } |
202 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) != | |
203 | sizeof(struct in6_addr)) { | |
204 | ret_val = -EINVAL; | |
4de46d5e | 205 | goto add_free_addrmap; |
63c41688 PM |
206 | } |
207 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]); | |
208 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]); | |
209 | ||
210 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
211 | if (map == NULL) { | |
212 | ret_val = -ENOMEM; | |
4de46d5e | 213 | goto add_free_addrmap; |
63c41688 | 214 | } |
4e3fd7a0 | 215 | map->list.addr = *addr; |
63c41688 PM |
216 | map->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; |
217 | map->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; | |
218 | map->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; | |
219 | map->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; | |
4e3fd7a0 | 220 | map->list.mask = *mask; |
63c41688 | 221 | map->list.valid = 1; |
6a8b7f0c | 222 | map->def.type = entry->def.type; |
63c41688 PM |
223 | |
224 | ret_val = netlbl_af6list_add(&map->list, &addrmap->list6); | |
225 | if (ret_val != 0) { | |
226 | kfree(map); | |
4de46d5e | 227 | goto add_free_addrmap; |
63c41688 PM |
228 | } |
229 | ||
6a8b7f0c PM |
230 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
231 | entry->def.addrsel = addrmap; | |
63c41688 PM |
232 | #endif /* IPv6 */ |
233 | } | |
234 | ||
235 | ret_val = netlbl_domhsh_add(entry, audit_info); | |
fd385855 | 236 | if (ret_val != 0) |
4de46d5e | 237 | goto add_free_addrmap; |
d15c345f | 238 | |
d15c345f PM |
239 | return 0; |
240 | ||
4de46d5e | 241 | add_free_addrmap: |
63c41688 | 242 | kfree(addrmap); |
4de46d5e ME |
243 | add_doi_put_def: |
244 | cipso_v4_doi_putdef(cipsov4); | |
245 | add_free_domain: | |
246 | kfree(entry->domain); | |
247 | add_free_entry: | |
d15c345f | 248 | kfree(entry); |
d15c345f PM |
249 | return ret_val; |
250 | } | |
251 | ||
63c41688 PM |
252 | /** |
253 | * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry | |
254 | * @skb: the NETLINK buffer | |
255 | * @entry: the map entry | |
256 | * | |
257 | * Description: | |
258 | * This function is a helper function used by the LISTALL and LISTDEF command | |
25985edc | 259 | * handlers. The caller is responsible for ensuring that the RCU read lock |
63c41688 PM |
260 | * is held. Returns zero on success, negative values on failure. |
261 | * | |
262 | */ | |
263 | static int netlbl_mgmt_listentry(struct sk_buff *skb, | |
264 | struct netlbl_dom_map *entry) | |
265 | { | |
f8a02479 | 266 | int ret_val = 0; |
63c41688 PM |
267 | struct nlattr *nla_a; |
268 | struct nlattr *nla_b; | |
269 | struct netlbl_af4list *iter4; | |
dfd56b8b | 270 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
271 | struct netlbl_af6list *iter6; |
272 | #endif | |
273 | ||
274 | if (entry->domain != NULL) { | |
275 | ret_val = nla_put_string(skb, | |
276 | NLBL_MGMT_A_DOMAIN, entry->domain); | |
277 | if (ret_val != 0) | |
278 | return ret_val; | |
279 | } | |
280 | ||
6a8b7f0c | 281 | switch (entry->def.type) { |
63c41688 PM |
282 | case NETLBL_NLTYPE_ADDRSELECT: |
283 | nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST); | |
284 | if (nla_a == NULL) | |
285 | return -ENOMEM; | |
286 | ||
6a8b7f0c | 287 | netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) { |
63c41688 PM |
288 | struct netlbl_domaddr4_map *map4; |
289 | struct in_addr addr_struct; | |
290 | ||
291 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
292 | if (nla_b == NULL) | |
293 | return -ENOMEM; | |
294 | ||
295 | addr_struct.s_addr = iter4->addr; | |
296 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV4ADDR, | |
297 | sizeof(struct in_addr), | |
298 | &addr_struct); | |
299 | if (ret_val != 0) | |
300 | return ret_val; | |
301 | addr_struct.s_addr = iter4->mask; | |
302 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV4MASK, | |
303 | sizeof(struct in_addr), | |
304 | &addr_struct); | |
305 | if (ret_val != 0) | |
306 | return ret_val; | |
307 | map4 = netlbl_domhsh_addr4_entry(iter4); | |
308 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 309 | map4->def.type); |
63c41688 PM |
310 | if (ret_val != 0) |
311 | return ret_val; | |
6a8b7f0c | 312 | switch (map4->def.type) { |
63c41688 PM |
313 | case NETLBL_NLTYPE_CIPSOV4: |
314 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 315 | map4->def.cipso->doi); |
63c41688 PM |
316 | if (ret_val != 0) |
317 | return ret_val; | |
318 | break; | |
319 | } | |
320 | ||
321 | nla_nest_end(skb, nla_b); | |
322 | } | |
dfd56b8b | 323 | #if IS_ENABLED(CONFIG_IPV6) |
6a8b7f0c | 324 | netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { |
63c41688 PM |
325 | struct netlbl_domaddr6_map *map6; |
326 | ||
327 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
328 | if (nla_b == NULL) | |
329 | return -ENOMEM; | |
330 | ||
331 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR, | |
332 | sizeof(struct in6_addr), | |
333 | &iter6->addr); | |
334 | if (ret_val != 0) | |
335 | return ret_val; | |
336 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK, | |
337 | sizeof(struct in6_addr), | |
338 | &iter6->mask); | |
339 | if (ret_val != 0) | |
340 | return ret_val; | |
341 | map6 = netlbl_domhsh_addr6_entry(iter6); | |
342 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 343 | map6->def.type); |
63c41688 PM |
344 | if (ret_val != 0) |
345 | return ret_val; | |
346 | ||
347 | nla_nest_end(skb, nla_b); | |
348 | } | |
349 | #endif /* IPv6 */ | |
350 | ||
351 | nla_nest_end(skb, nla_a); | |
352 | break; | |
353 | case NETLBL_NLTYPE_UNLABELED: | |
6a8b7f0c | 354 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
355 | break; |
356 | case NETLBL_NLTYPE_CIPSOV4: | |
6a8b7f0c | 357 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
358 | if (ret_val != 0) |
359 | return ret_val; | |
360 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 361 | entry->def.cipso->doi); |
63c41688 PM |
362 | break; |
363 | } | |
364 | ||
365 | return ret_val; | |
366 | } | |
367 | ||
368 | /* | |
369 | * NetLabel Command Handlers | |
370 | */ | |
371 | ||
372 | /** | |
373 | * netlbl_mgmt_add - Handle an ADD message | |
374 | * @skb: the NETLINK buffer | |
375 | * @info: the Generic NETLINK info block | |
376 | * | |
377 | * Description: | |
378 | * Process a user generated ADD message and add the domains from the message | |
379 | * to the hash table. See netlabel.h for a description of the message format. | |
380 | * Returns zero on success, negative values on failure. | |
381 | * | |
382 | */ | |
383 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) | |
384 | { | |
385 | struct netlbl_audit audit_info; | |
386 | ||
387 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || | |
388 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || | |
389 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
390 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
391 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
392 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
393 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
394 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
395 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
396 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
397 | return -EINVAL; | |
398 | ||
399 | netlbl_netlink_auditinfo(skb, &audit_info); | |
400 | ||
401 | return netlbl_mgmt_add_common(info, &audit_info); | |
402 | } | |
403 | ||
d15c345f PM |
404 | /** |
405 | * netlbl_mgmt_remove - Handle a REMOVE message | |
406 | * @skb: the NETLINK buffer | |
407 | * @info: the Generic NETLINK info block | |
408 | * | |
409 | * Description: | |
410 | * Process a user generated REMOVE message and remove the specified domain | |
411 | * mappings. Returns zero on success, negative values on failure. | |
412 | * | |
413 | */ | |
414 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) | |
415 | { | |
fd385855 | 416 | char *domain; |
95d4e6be | 417 | struct netlbl_audit audit_info; |
d15c345f | 418 | |
fd385855 PM |
419 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
420 | return -EINVAL; | |
d15c345f | 421 | |
95d4e6be PM |
422 | netlbl_netlink_auditinfo(skb, &audit_info); |
423 | ||
fd385855 | 424 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
95d4e6be | 425 | return netlbl_domhsh_remove(domain, &audit_info); |
fd385855 PM |
426 | } |
427 | ||
428 | /** | |
429 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL | |
430 | * @entry: the domain mapping hash table entry | |
431 | * @arg: the netlbl_domhsh_walk_arg structure | |
432 | * | |
433 | * Description: | |
434 | * This function is designed to be used as a callback to the | |
435 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL | |
436 | * message. Returns the size of the message on success, negative values on | |
437 | * failure. | |
438 | * | |
439 | */ | |
440 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) | |
441 | { | |
442 | int ret_val = -ENOMEM; | |
443 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
444 | void *data; | |
445 | ||
15e47304 | 446 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, |
17c157c8 TG |
447 | cb_arg->seq, &netlbl_mgmt_gnl_family, |
448 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); | |
fd385855 PM |
449 | if (data == NULL) |
450 | goto listall_cb_failure; | |
451 | ||
63c41688 | 452 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
fd385855 PM |
453 | if (ret_val != 0) |
454 | goto listall_cb_failure; | |
d15c345f | 455 | |
fd385855 | 456 | cb_arg->seq++; |
053c095a JB |
457 | genlmsg_end(cb_arg->skb, data); |
458 | return 0; | |
d15c345f | 459 | |
fd385855 PM |
460 | listall_cb_failure: |
461 | genlmsg_cancel(cb_arg->skb, data); | |
d15c345f PM |
462 | return ret_val; |
463 | } | |
464 | ||
465 | /** | |
fd385855 | 466 | * netlbl_mgmt_listall - Handle a LISTALL message |
d15c345f | 467 | * @skb: the NETLINK buffer |
fd385855 | 468 | * @cb: the NETLINK callback |
d15c345f PM |
469 | * |
470 | * Description: | |
fd385855 PM |
471 | * Process a user generated LISTALL message and dumps the domain hash table in |
472 | * a form suitable for use in a kernel generated LISTALL message. Returns zero | |
473 | * on success, negative values on failure. | |
d15c345f PM |
474 | * |
475 | */ | |
fd385855 PM |
476 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
477 | struct netlink_callback *cb) | |
d15c345f | 478 | { |
fd385855 PM |
479 | struct netlbl_domhsh_walk_arg cb_arg; |
480 | u32 skip_bkt = cb->args[0]; | |
481 | u32 skip_chain = cb->args[1]; | |
482 | ||
483 | cb_arg.nl_cb = cb; | |
484 | cb_arg.skb = skb; | |
485 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
486 | ||
487 | netlbl_domhsh_walk(&skip_bkt, | |
488 | &skip_chain, | |
489 | netlbl_mgmt_listall_cb, | |
490 | &cb_arg); | |
491 | ||
492 | cb->args[0] = skip_bkt; | |
493 | cb->args[1] = skip_chain; | |
494 | return skb->len; | |
d15c345f PM |
495 | } |
496 | ||
497 | /** | |
498 | * netlbl_mgmt_adddef - Handle an ADDDEF message | |
499 | * @skb: the NETLINK buffer | |
500 | * @info: the Generic NETLINK info block | |
501 | * | |
502 | * Description: | |
503 | * Process a user generated ADDDEF message and respond accordingly. Returns | |
504 | * zero on success, negative values on failure. | |
505 | * | |
506 | */ | |
507 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) | |
508 | { | |
95d4e6be | 509 | struct netlbl_audit audit_info; |
d15c345f | 510 | |
63c41688 PM |
511 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
512 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
513 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
514 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
515 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
516 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
517 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
518 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
519 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
520 | return -EINVAL; | |
d15c345f | 521 | |
95d4e6be PM |
522 | netlbl_netlink_auditinfo(skb, &audit_info); |
523 | ||
63c41688 | 524 | return netlbl_mgmt_add_common(info, &audit_info); |
d15c345f PM |
525 | } |
526 | ||
527 | /** | |
528 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message | |
529 | * @skb: the NETLINK buffer | |
530 | * @info: the Generic NETLINK info block | |
531 | * | |
532 | * Description: | |
533 | * Process a user generated REMOVEDEF message and remove the default domain | |
534 | * mapping. Returns zero on success, negative values on failure. | |
535 | * | |
536 | */ | |
537 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) | |
538 | { | |
95d4e6be PM |
539 | struct netlbl_audit audit_info; |
540 | ||
541 | netlbl_netlink_auditinfo(skb, &audit_info); | |
542 | ||
543 | return netlbl_domhsh_remove_default(&audit_info); | |
d15c345f PM |
544 | } |
545 | ||
546 | /** | |
547 | * netlbl_mgmt_listdef - Handle a LISTDEF message | |
548 | * @skb: the NETLINK buffer | |
549 | * @info: the Generic NETLINK info block | |
550 | * | |
551 | * Description: | |
552 | * Process a user generated LISTDEF message and dumps the default domain | |
553 | * mapping in a form suitable for use in a kernel generated LISTDEF message. | |
554 | * Returns zero on success, negative values on failure. | |
555 | * | |
556 | */ | |
557 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) | |
558 | { | |
559 | int ret_val = -ENOMEM; | |
fd385855 PM |
560 | struct sk_buff *ans_skb = NULL; |
561 | void *data; | |
562 | struct netlbl_dom_map *entry; | |
d15c345f | 563 | |
339bf98f | 564 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 565 | if (ans_skb == NULL) |
fd385855 | 566 | return -ENOMEM; |
17c157c8 TG |
567 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
568 | 0, NLBL_MGMT_C_LISTDEF); | |
fd385855 | 569 | if (data == NULL) |
d15c345f | 570 | goto listdef_failure; |
d15c345f | 571 | |
fd385855 PM |
572 | rcu_read_lock(); |
573 | entry = netlbl_domhsh_getentry(NULL); | |
574 | if (entry == NULL) { | |
575 | ret_val = -ENOENT; | |
576 | goto listdef_failure_lock; | |
577 | } | |
63c41688 | 578 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
fd385855 | 579 | rcu_read_unlock(); |
63c41688 PM |
580 | if (ret_val != 0) |
581 | goto listdef_failure; | |
d15c345f | 582 | |
fd385855 | 583 | genlmsg_end(ans_skb, data); |
fe785bee | 584 | return genlmsg_reply(ans_skb, info); |
d15c345f | 585 | |
fd385855 PM |
586 | listdef_failure_lock: |
587 | rcu_read_unlock(); | |
d15c345f | 588 | listdef_failure: |
fd385855 | 589 | kfree_skb(ans_skb); |
d15c345f PM |
590 | return ret_val; |
591 | } | |
592 | ||
593 | /** | |
fd385855 PM |
594 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
595 | * @skb: the skb to write to | |
fd385855 PM |
596 | * @cb: the NETLINK callback |
597 | * @protocol: the NetLabel protocol to use in the message | |
d15c345f PM |
598 | * |
599 | * Description: | |
fd385855 PM |
600 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
601 | * answer a application's PROTOCOLS message. Returns the size of the message | |
602 | * on success, negative values on failure. | |
d15c345f PM |
603 | * |
604 | */ | |
fd385855 PM |
605 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
606 | struct netlink_callback *cb, | |
607 | u32 protocol) | |
d15c345f PM |
608 | { |
609 | int ret_val = -ENOMEM; | |
fd385855 PM |
610 | void *data; |
611 | ||
15e47304 | 612 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
17c157c8 TG |
613 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, |
614 | NLBL_MGMT_C_PROTOCOLS); | |
fd385855 PM |
615 | if (data == NULL) |
616 | goto protocols_cb_failure; | |
617 | ||
618 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); | |
d15c345f | 619 | if (ret_val != 0) |
fd385855 | 620 | goto protocols_cb_failure; |
d15c345f | 621 | |
053c095a JB |
622 | genlmsg_end(skb, data); |
623 | return 0; | |
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 | } |