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; | |
930345ea JB |
296 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4ADDR, |
297 | addr_struct.s_addr); | |
63c41688 PM |
298 | if (ret_val != 0) |
299 | return ret_val; | |
300 | addr_struct.s_addr = iter4->mask; | |
930345ea JB |
301 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4MASK, |
302 | addr_struct.s_addr); | |
63c41688 PM |
303 | if (ret_val != 0) |
304 | return ret_val; | |
305 | map4 = netlbl_domhsh_addr4_entry(iter4); | |
306 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 307 | map4->def.type); |
63c41688 PM |
308 | if (ret_val != 0) |
309 | return ret_val; | |
6a8b7f0c | 310 | switch (map4->def.type) { |
63c41688 PM |
311 | case NETLBL_NLTYPE_CIPSOV4: |
312 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 313 | map4->def.cipso->doi); |
63c41688 PM |
314 | if (ret_val != 0) |
315 | return ret_val; | |
316 | break; | |
317 | } | |
318 | ||
319 | nla_nest_end(skb, nla_b); | |
320 | } | |
dfd56b8b | 321 | #if IS_ENABLED(CONFIG_IPV6) |
6a8b7f0c | 322 | netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { |
63c41688 PM |
323 | struct netlbl_domaddr6_map *map6; |
324 | ||
325 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
326 | if (nla_b == NULL) | |
327 | return -ENOMEM; | |
328 | ||
930345ea JB |
329 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6ADDR, |
330 | &iter6->addr); | |
63c41688 PM |
331 | if (ret_val != 0) |
332 | return ret_val; | |
930345ea JB |
333 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6MASK, |
334 | &iter6->mask); | |
63c41688 PM |
335 | if (ret_val != 0) |
336 | return ret_val; | |
337 | map6 = netlbl_domhsh_addr6_entry(iter6); | |
338 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 339 | map6->def.type); |
63c41688 PM |
340 | if (ret_val != 0) |
341 | return ret_val; | |
342 | ||
343 | nla_nest_end(skb, nla_b); | |
344 | } | |
345 | #endif /* IPv6 */ | |
346 | ||
347 | nla_nest_end(skb, nla_a); | |
348 | break; | |
349 | case NETLBL_NLTYPE_UNLABELED: | |
6a8b7f0c | 350 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
351 | break; |
352 | case NETLBL_NLTYPE_CIPSOV4: | |
6a8b7f0c | 353 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
354 | if (ret_val != 0) |
355 | return ret_val; | |
356 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 357 | entry->def.cipso->doi); |
63c41688 PM |
358 | break; |
359 | } | |
360 | ||
361 | return ret_val; | |
362 | } | |
363 | ||
364 | /* | |
365 | * NetLabel Command Handlers | |
366 | */ | |
367 | ||
368 | /** | |
369 | * netlbl_mgmt_add - Handle an ADD message | |
370 | * @skb: the NETLINK buffer | |
371 | * @info: the Generic NETLINK info block | |
372 | * | |
373 | * Description: | |
374 | * Process a user generated ADD message and add the domains from the message | |
375 | * to the hash table. See netlabel.h for a description of the message format. | |
376 | * Returns zero on success, negative values on failure. | |
377 | * | |
378 | */ | |
379 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) | |
380 | { | |
381 | struct netlbl_audit audit_info; | |
382 | ||
383 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || | |
384 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || | |
385 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
386 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
387 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
388 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
389 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
390 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
391 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
392 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
393 | return -EINVAL; | |
394 | ||
395 | netlbl_netlink_auditinfo(skb, &audit_info); | |
396 | ||
397 | return netlbl_mgmt_add_common(info, &audit_info); | |
398 | } | |
399 | ||
d15c345f PM |
400 | /** |
401 | * netlbl_mgmt_remove - Handle a REMOVE message | |
402 | * @skb: the NETLINK buffer | |
403 | * @info: the Generic NETLINK info block | |
404 | * | |
405 | * Description: | |
406 | * Process a user generated REMOVE message and remove the specified domain | |
407 | * mappings. Returns zero on success, negative values on failure. | |
408 | * | |
409 | */ | |
410 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) | |
411 | { | |
fd385855 | 412 | char *domain; |
95d4e6be | 413 | struct netlbl_audit audit_info; |
d15c345f | 414 | |
fd385855 PM |
415 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
416 | return -EINVAL; | |
d15c345f | 417 | |
95d4e6be PM |
418 | netlbl_netlink_auditinfo(skb, &audit_info); |
419 | ||
fd385855 | 420 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
95d4e6be | 421 | return netlbl_domhsh_remove(domain, &audit_info); |
fd385855 PM |
422 | } |
423 | ||
424 | /** | |
425 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL | |
426 | * @entry: the domain mapping hash table entry | |
427 | * @arg: the netlbl_domhsh_walk_arg structure | |
428 | * | |
429 | * Description: | |
430 | * This function is designed to be used as a callback to the | |
431 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL | |
432 | * message. Returns the size of the message on success, negative values on | |
433 | * failure. | |
434 | * | |
435 | */ | |
436 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) | |
437 | { | |
438 | int ret_val = -ENOMEM; | |
439 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
440 | void *data; | |
441 | ||
15e47304 | 442 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, |
17c157c8 TG |
443 | cb_arg->seq, &netlbl_mgmt_gnl_family, |
444 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); | |
fd385855 PM |
445 | if (data == NULL) |
446 | goto listall_cb_failure; | |
447 | ||
63c41688 | 448 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
fd385855 PM |
449 | if (ret_val != 0) |
450 | goto listall_cb_failure; | |
d15c345f | 451 | |
fd385855 | 452 | cb_arg->seq++; |
053c095a JB |
453 | genlmsg_end(cb_arg->skb, data); |
454 | return 0; | |
d15c345f | 455 | |
fd385855 PM |
456 | listall_cb_failure: |
457 | genlmsg_cancel(cb_arg->skb, data); | |
d15c345f PM |
458 | return ret_val; |
459 | } | |
460 | ||
461 | /** | |
fd385855 | 462 | * netlbl_mgmt_listall - Handle a LISTALL message |
d15c345f | 463 | * @skb: the NETLINK buffer |
fd385855 | 464 | * @cb: the NETLINK callback |
d15c345f PM |
465 | * |
466 | * Description: | |
fd385855 PM |
467 | * Process a user generated LISTALL message and dumps the domain hash table in |
468 | * a form suitable for use in a kernel generated LISTALL message. Returns zero | |
469 | * on success, negative values on failure. | |
d15c345f PM |
470 | * |
471 | */ | |
fd385855 PM |
472 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
473 | struct netlink_callback *cb) | |
d15c345f | 474 | { |
fd385855 PM |
475 | struct netlbl_domhsh_walk_arg cb_arg; |
476 | u32 skip_bkt = cb->args[0]; | |
477 | u32 skip_chain = cb->args[1]; | |
478 | ||
479 | cb_arg.nl_cb = cb; | |
480 | cb_arg.skb = skb; | |
481 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
482 | ||
483 | netlbl_domhsh_walk(&skip_bkt, | |
484 | &skip_chain, | |
485 | netlbl_mgmt_listall_cb, | |
486 | &cb_arg); | |
487 | ||
488 | cb->args[0] = skip_bkt; | |
489 | cb->args[1] = skip_chain; | |
490 | return skb->len; | |
d15c345f PM |
491 | } |
492 | ||
493 | /** | |
494 | * netlbl_mgmt_adddef - Handle an ADDDEF message | |
495 | * @skb: the NETLINK buffer | |
496 | * @info: the Generic NETLINK info block | |
497 | * | |
498 | * Description: | |
499 | * Process a user generated ADDDEF message and respond accordingly. Returns | |
500 | * zero on success, negative values on failure. | |
501 | * | |
502 | */ | |
503 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) | |
504 | { | |
95d4e6be | 505 | struct netlbl_audit audit_info; |
d15c345f | 506 | |
63c41688 PM |
507 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
508 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
509 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
510 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
511 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
512 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
513 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
514 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
515 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
516 | return -EINVAL; | |
d15c345f | 517 | |
95d4e6be PM |
518 | netlbl_netlink_auditinfo(skb, &audit_info); |
519 | ||
63c41688 | 520 | return netlbl_mgmt_add_common(info, &audit_info); |
d15c345f PM |
521 | } |
522 | ||
523 | /** | |
524 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message | |
525 | * @skb: the NETLINK buffer | |
526 | * @info: the Generic NETLINK info block | |
527 | * | |
528 | * Description: | |
529 | * Process a user generated REMOVEDEF message and remove the default domain | |
530 | * mapping. Returns zero on success, negative values on failure. | |
531 | * | |
532 | */ | |
533 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) | |
534 | { | |
95d4e6be PM |
535 | struct netlbl_audit audit_info; |
536 | ||
537 | netlbl_netlink_auditinfo(skb, &audit_info); | |
538 | ||
539 | return netlbl_domhsh_remove_default(&audit_info); | |
d15c345f PM |
540 | } |
541 | ||
542 | /** | |
543 | * netlbl_mgmt_listdef - Handle a LISTDEF message | |
544 | * @skb: the NETLINK buffer | |
545 | * @info: the Generic NETLINK info block | |
546 | * | |
547 | * Description: | |
548 | * Process a user generated LISTDEF message and dumps the default domain | |
549 | * mapping in a form suitable for use in a kernel generated LISTDEF message. | |
550 | * Returns zero on success, negative values on failure. | |
551 | * | |
552 | */ | |
553 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) | |
554 | { | |
555 | int ret_val = -ENOMEM; | |
fd385855 PM |
556 | struct sk_buff *ans_skb = NULL; |
557 | void *data; | |
558 | struct netlbl_dom_map *entry; | |
d15c345f | 559 | |
339bf98f | 560 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 561 | if (ans_skb == NULL) |
fd385855 | 562 | return -ENOMEM; |
17c157c8 TG |
563 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
564 | 0, NLBL_MGMT_C_LISTDEF); | |
fd385855 | 565 | if (data == NULL) |
d15c345f | 566 | goto listdef_failure; |
d15c345f | 567 | |
fd385855 PM |
568 | rcu_read_lock(); |
569 | entry = netlbl_domhsh_getentry(NULL); | |
570 | if (entry == NULL) { | |
571 | ret_val = -ENOENT; | |
572 | goto listdef_failure_lock; | |
573 | } | |
63c41688 | 574 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
fd385855 | 575 | rcu_read_unlock(); |
63c41688 PM |
576 | if (ret_val != 0) |
577 | goto listdef_failure; | |
d15c345f | 578 | |
fd385855 | 579 | genlmsg_end(ans_skb, data); |
fe785bee | 580 | return genlmsg_reply(ans_skb, info); |
d15c345f | 581 | |
fd385855 PM |
582 | listdef_failure_lock: |
583 | rcu_read_unlock(); | |
d15c345f | 584 | listdef_failure: |
fd385855 | 585 | kfree_skb(ans_skb); |
d15c345f PM |
586 | return ret_val; |
587 | } | |
588 | ||
589 | /** | |
fd385855 PM |
590 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
591 | * @skb: the skb to write to | |
fd385855 PM |
592 | * @cb: the NETLINK callback |
593 | * @protocol: the NetLabel protocol to use in the message | |
d15c345f PM |
594 | * |
595 | * Description: | |
fd385855 PM |
596 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
597 | * answer a application's PROTOCOLS message. Returns the size of the message | |
598 | * on success, negative values on failure. | |
d15c345f PM |
599 | * |
600 | */ | |
fd385855 PM |
601 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
602 | struct netlink_callback *cb, | |
603 | u32 protocol) | |
d15c345f PM |
604 | { |
605 | int ret_val = -ENOMEM; | |
fd385855 PM |
606 | void *data; |
607 | ||
15e47304 | 608 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
17c157c8 TG |
609 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, |
610 | NLBL_MGMT_C_PROTOCOLS); | |
fd385855 PM |
611 | if (data == NULL) |
612 | goto protocols_cb_failure; | |
613 | ||
614 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); | |
d15c345f | 615 | if (ret_val != 0) |
fd385855 | 616 | goto protocols_cb_failure; |
d15c345f | 617 | |
053c095a JB |
618 | genlmsg_end(skb, data); |
619 | return 0; | |
d15c345f | 620 | |
fd385855 PM |
621 | protocols_cb_failure: |
622 | genlmsg_cancel(skb, data); | |
d15c345f PM |
623 | return ret_val; |
624 | } | |
625 | ||
fd385855 PM |
626 | /** |
627 | * netlbl_mgmt_protocols - Handle a PROTOCOLS message | |
628 | * @skb: the NETLINK buffer | |
629 | * @cb: the NETLINK callback | |
630 | * | |
631 | * Description: | |
632 | * Process a user generated PROTOCOLS message and respond accordingly. | |
633 | * | |
634 | */ | |
635 | static int netlbl_mgmt_protocols(struct sk_buff *skb, | |
636 | struct netlink_callback *cb) | |
637 | { | |
638 | u32 protos_sent = cb->args[0]; | |
639 | ||
640 | if (protos_sent == 0) { | |
641 | if (netlbl_mgmt_protocols_cb(skb, | |
642 | cb, | |
643 | NETLBL_NLTYPE_UNLABELED) < 0) | |
644 | goto protocols_return; | |
645 | protos_sent++; | |
646 | } | |
647 | if (protos_sent == 1) { | |
648 | if (netlbl_mgmt_protocols_cb(skb, | |
649 | cb, | |
650 | NETLBL_NLTYPE_CIPSOV4) < 0) | |
651 | goto protocols_return; | |
652 | protos_sent++; | |
653 | } | |
654 | ||
655 | protocols_return: | |
656 | cb->args[0] = protos_sent; | |
657 | return skb->len; | |
658 | } | |
659 | ||
d15c345f PM |
660 | /** |
661 | * netlbl_mgmt_version - Handle a VERSION message | |
662 | * @skb: the NETLINK buffer | |
663 | * @info: the Generic NETLINK info block | |
664 | * | |
665 | * Description: | |
666 | * Process a user generated VERSION message and respond accordingly. Returns | |
667 | * zero on success, negative values on failure. | |
668 | * | |
669 | */ | |
670 | static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info) | |
671 | { | |
672 | int ret_val = -ENOMEM; | |
673 | struct sk_buff *ans_skb = NULL; | |
fd385855 | 674 | void *data; |
d15c345f | 675 | |
339bf98f | 676 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 677 | if (ans_skb == NULL) |
fd385855 | 678 | return -ENOMEM; |
17c157c8 TG |
679 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
680 | 0, NLBL_MGMT_C_VERSION); | |
fd385855 | 681 | if (data == NULL) |
d15c345f PM |
682 | goto version_failure; |
683 | ||
fd385855 PM |
684 | ret_val = nla_put_u32(ans_skb, |
685 | NLBL_MGMT_A_VERSION, | |
686 | NETLBL_PROTO_VERSION); | |
d15c345f PM |
687 | if (ret_val != 0) |
688 | goto version_failure; | |
689 | ||
fd385855 | 690 | genlmsg_end(ans_skb, data); |
fe785bee | 691 | return genlmsg_reply(ans_skb, info); |
d15c345f PM |
692 | |
693 | version_failure: | |
694 | kfree_skb(ans_skb); | |
d15c345f PM |
695 | return ret_val; |
696 | } | |
697 | ||
698 | ||
699 | /* | |
700 | * NetLabel Generic NETLINK Command Definitions | |
701 | */ | |
702 | ||
4534de83 | 703 | static const struct genl_ops netlbl_mgmt_genl_ops[] = { |
227c43c3 | 704 | { |
d15c345f | 705 | .cmd = NLBL_MGMT_C_ADD, |
fd385855 PM |
706 | .flags = GENL_ADMIN_PERM, |
707 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
708 | .doit = netlbl_mgmt_add, |
709 | .dumpit = NULL, | |
227c43c3 PE |
710 | }, |
711 | { | |
d15c345f | 712 | .cmd = NLBL_MGMT_C_REMOVE, |
fd385855 PM |
713 | .flags = GENL_ADMIN_PERM, |
714 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
715 | .doit = netlbl_mgmt_remove, |
716 | .dumpit = NULL, | |
227c43c3 PE |
717 | }, |
718 | { | |
fd385855 | 719 | .cmd = NLBL_MGMT_C_LISTALL, |
d15c345f | 720 | .flags = 0, |
fd385855 PM |
721 | .policy = netlbl_mgmt_genl_policy, |
722 | .doit = NULL, | |
723 | .dumpit = netlbl_mgmt_listall, | |
227c43c3 PE |
724 | }, |
725 | { | |
d15c345f | 726 | .cmd = NLBL_MGMT_C_ADDDEF, |
fd385855 PM |
727 | .flags = GENL_ADMIN_PERM, |
728 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
729 | .doit = netlbl_mgmt_adddef, |
730 | .dumpit = NULL, | |
227c43c3 PE |
731 | }, |
732 | { | |
d15c345f | 733 | .cmd = NLBL_MGMT_C_REMOVEDEF, |
fd385855 PM |
734 | .flags = GENL_ADMIN_PERM, |
735 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
736 | .doit = netlbl_mgmt_removedef, |
737 | .dumpit = NULL, | |
227c43c3 PE |
738 | }, |
739 | { | |
d15c345f PM |
740 | .cmd = NLBL_MGMT_C_LISTDEF, |
741 | .flags = 0, | |
fd385855 | 742 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
743 | .doit = netlbl_mgmt_listdef, |
744 | .dumpit = NULL, | |
227c43c3 PE |
745 | }, |
746 | { | |
fd385855 | 747 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
d15c345f | 748 | .flags = 0, |
fd385855 PM |
749 | .policy = netlbl_mgmt_genl_policy, |
750 | .doit = NULL, | |
751 | .dumpit = netlbl_mgmt_protocols, | |
227c43c3 PE |
752 | }, |
753 | { | |
d15c345f PM |
754 | .cmd = NLBL_MGMT_C_VERSION, |
755 | .flags = 0, | |
fd385855 | 756 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
757 | .doit = netlbl_mgmt_version, |
758 | .dumpit = NULL, | |
227c43c3 | 759 | }, |
d15c345f PM |
760 | }; |
761 | ||
762 | /* | |
763 | * NetLabel Generic NETLINK Protocol Functions | |
764 | */ | |
765 | ||
766 | /** | |
767 | * netlbl_mgmt_genl_init - Register the NetLabel management component | |
768 | * | |
769 | * Description: | |
770 | * Register the NetLabel management component with the Generic NETLINK | |
771 | * mechanism. Returns zero on success, negative values on failure. | |
772 | * | |
773 | */ | |
05705e4e | 774 | int __init netlbl_mgmt_genl_init(void) |
d15c345f | 775 | { |
7ae740df | 776 | return genl_register_family_with_ops(&netlbl_mgmt_gnl_family, |
c53ed742 | 777 | netlbl_mgmt_genl_ops); |
d15c345f | 778 | } |