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 | * | |
8 | * Author: Paul Moore <paul.moore@hp.com> | |
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 | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
28 | * | |
29 | */ | |
30 | ||
31 | #include <linux/types.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/skbuff.h> | |
63c41688 PM |
35 | #include <linux/in.h> |
36 | #include <linux/in6.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> | |
c783f1ce | 44 | #include <asm/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 | } | |
fd385855 | 106 | entry->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 | ||
118 | /* NOTE: internally we allow/use a entry->type value of | |
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 | |
fd385855 PM |
123 | switch (entry->type) { |
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; |
63c41688 | 134 | entry->type_def.cipsov4 = 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; | |
174 | map->type = entry->type; | |
175 | if (cipsov4) | |
176 | map->type_def.cipsov4 = cipsov4; | |
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 | ||
184 | entry->type = NETLBL_NLTYPE_ADDRSELECT; | |
185 | entry->type_def.addrsel = addrmap; | |
186 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
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 | } | |
218 | ipv6_addr_copy(&map->list.addr, addr); | |
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]; | |
223 | ipv6_addr_copy(&map->list.mask, mask); | |
224 | map->list.valid = 1; | |
225 | map->type = entry->type; | |
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 | ||
233 | entry->type = NETLBL_NLTYPE_ADDRSELECT; | |
234 | entry->type_def.addrsel = addrmap; | |
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 | |
261 | * handlers. The caller is responsibile for ensuring that the RCU read lock | |
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; | |
272 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
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 | ||
283 | switch (entry->type) { | |
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 | ||
289 | netlbl_af4list_foreach_rcu(iter4, | |
290 | &entry->type_def.addrsel->list4) { | |
291 | struct netlbl_domaddr4_map *map4; | |
292 | struct in_addr addr_struct; | |
293 | ||
294 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
295 | if (nla_b == NULL) | |
296 | return -ENOMEM; | |
297 | ||
298 | addr_struct.s_addr = iter4->addr; | |
299 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV4ADDR, | |
300 | sizeof(struct in_addr), | |
301 | &addr_struct); | |
302 | if (ret_val != 0) | |
303 | return ret_val; | |
304 | addr_struct.s_addr = iter4->mask; | |
305 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV4MASK, | |
306 | sizeof(struct in_addr), | |
307 | &addr_struct); | |
308 | if (ret_val != 0) | |
309 | return ret_val; | |
310 | map4 = netlbl_domhsh_addr4_entry(iter4); | |
311 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
312 | map4->type); | |
313 | if (ret_val != 0) | |
314 | return ret_val; | |
315 | switch (map4->type) { | |
316 | case NETLBL_NLTYPE_CIPSOV4: | |
317 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
318 | map4->type_def.cipsov4->doi); | |
319 | if (ret_val != 0) | |
320 | return ret_val; | |
321 | break; | |
322 | } | |
323 | ||
324 | nla_nest_end(skb, nla_b); | |
325 | } | |
326 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
327 | netlbl_af6list_foreach_rcu(iter6, | |
328 | &entry->type_def.addrsel->list6) { | |
329 | struct netlbl_domaddr6_map *map6; | |
330 | ||
331 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
332 | if (nla_b == NULL) | |
333 | return -ENOMEM; | |
334 | ||
335 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR, | |
336 | sizeof(struct in6_addr), | |
337 | &iter6->addr); | |
338 | if (ret_val != 0) | |
339 | return ret_val; | |
340 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK, | |
341 | sizeof(struct in6_addr), | |
342 | &iter6->mask); | |
343 | if (ret_val != 0) | |
344 | return ret_val; | |
345 | map6 = netlbl_domhsh_addr6_entry(iter6); | |
346 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
347 | map6->type); | |
348 | if (ret_val != 0) | |
349 | return ret_val; | |
350 | ||
351 | nla_nest_end(skb, nla_b); | |
352 | } | |
353 | #endif /* IPv6 */ | |
354 | ||
355 | nla_nest_end(skb, nla_a); | |
356 | break; | |
357 | case NETLBL_NLTYPE_UNLABELED: | |
358 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type); | |
359 | break; | |
360 | case NETLBL_NLTYPE_CIPSOV4: | |
361 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type); | |
362 | if (ret_val != 0) | |
363 | return ret_val; | |
364 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
365 | entry->type_def.cipsov4->doi); | |
366 | break; | |
367 | } | |
368 | ||
369 | return ret_val; | |
370 | } | |
371 | ||
372 | /* | |
373 | * NetLabel Command Handlers | |
374 | */ | |
375 | ||
376 | /** | |
377 | * netlbl_mgmt_add - Handle an ADD message | |
378 | * @skb: the NETLINK buffer | |
379 | * @info: the Generic NETLINK info block | |
380 | * | |
381 | * Description: | |
382 | * Process a user generated ADD message and add the domains from the message | |
383 | * to the hash table. See netlabel.h for a description of the message format. | |
384 | * Returns zero on success, negative values on failure. | |
385 | * | |
386 | */ | |
387 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) | |
388 | { | |
389 | struct netlbl_audit audit_info; | |
390 | ||
391 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || | |
392 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || | |
393 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
394 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
395 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
396 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
397 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
398 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
399 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
400 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
401 | return -EINVAL; | |
402 | ||
403 | netlbl_netlink_auditinfo(skb, &audit_info); | |
404 | ||
405 | return netlbl_mgmt_add_common(info, &audit_info); | |
406 | } | |
407 | ||
d15c345f PM |
408 | /** |
409 | * netlbl_mgmt_remove - Handle a REMOVE message | |
410 | * @skb: the NETLINK buffer | |
411 | * @info: the Generic NETLINK info block | |
412 | * | |
413 | * Description: | |
414 | * Process a user generated REMOVE message and remove the specified domain | |
415 | * mappings. Returns zero on success, negative values on failure. | |
416 | * | |
417 | */ | |
418 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) | |
419 | { | |
fd385855 | 420 | char *domain; |
95d4e6be | 421 | struct netlbl_audit audit_info; |
d15c345f | 422 | |
fd385855 PM |
423 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
424 | return -EINVAL; | |
d15c345f | 425 | |
95d4e6be PM |
426 | netlbl_netlink_auditinfo(skb, &audit_info); |
427 | ||
fd385855 | 428 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
95d4e6be | 429 | return netlbl_domhsh_remove(domain, &audit_info); |
fd385855 PM |
430 | } |
431 | ||
432 | /** | |
433 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL | |
434 | * @entry: the domain mapping hash table entry | |
435 | * @arg: the netlbl_domhsh_walk_arg structure | |
436 | * | |
437 | * Description: | |
438 | * This function is designed to be used as a callback to the | |
439 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL | |
440 | * message. Returns the size of the message on success, negative values on | |
441 | * failure. | |
442 | * | |
443 | */ | |
444 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) | |
445 | { | |
446 | int ret_val = -ENOMEM; | |
447 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
448 | void *data; | |
449 | ||
17c157c8 TG |
450 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid, |
451 | cb_arg->seq, &netlbl_mgmt_gnl_family, | |
452 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); | |
fd385855 PM |
453 | if (data == NULL) |
454 | goto listall_cb_failure; | |
455 | ||
63c41688 | 456 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
fd385855 PM |
457 | if (ret_val != 0) |
458 | goto listall_cb_failure; | |
d15c345f | 459 | |
fd385855 PM |
460 | cb_arg->seq++; |
461 | return genlmsg_end(cb_arg->skb, data); | |
d15c345f | 462 | |
fd385855 PM |
463 | listall_cb_failure: |
464 | genlmsg_cancel(cb_arg->skb, data); | |
d15c345f PM |
465 | return ret_val; |
466 | } | |
467 | ||
468 | /** | |
fd385855 | 469 | * netlbl_mgmt_listall - Handle a LISTALL message |
d15c345f | 470 | * @skb: the NETLINK buffer |
fd385855 | 471 | * @cb: the NETLINK callback |
d15c345f PM |
472 | * |
473 | * Description: | |
fd385855 PM |
474 | * Process a user generated LISTALL message and dumps the domain hash table in |
475 | * a form suitable for use in a kernel generated LISTALL message. Returns zero | |
476 | * on success, negative values on failure. | |
d15c345f PM |
477 | * |
478 | */ | |
fd385855 PM |
479 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
480 | struct netlink_callback *cb) | |
d15c345f | 481 | { |
fd385855 PM |
482 | struct netlbl_domhsh_walk_arg cb_arg; |
483 | u32 skip_bkt = cb->args[0]; | |
484 | u32 skip_chain = cb->args[1]; | |
485 | ||
486 | cb_arg.nl_cb = cb; | |
487 | cb_arg.skb = skb; | |
488 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
489 | ||
490 | netlbl_domhsh_walk(&skip_bkt, | |
491 | &skip_chain, | |
492 | netlbl_mgmt_listall_cb, | |
493 | &cb_arg); | |
494 | ||
495 | cb->args[0] = skip_bkt; | |
496 | cb->args[1] = skip_chain; | |
497 | return skb->len; | |
d15c345f PM |
498 | } |
499 | ||
500 | /** | |
501 | * netlbl_mgmt_adddef - Handle an ADDDEF message | |
502 | * @skb: the NETLINK buffer | |
503 | * @info: the Generic NETLINK info block | |
504 | * | |
505 | * Description: | |
506 | * Process a user generated ADDDEF message and respond accordingly. Returns | |
507 | * zero on success, negative values on failure. | |
508 | * | |
509 | */ | |
510 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) | |
511 | { | |
95d4e6be | 512 | struct netlbl_audit audit_info; |
d15c345f | 513 | |
63c41688 PM |
514 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
515 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
516 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
517 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
518 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
519 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
520 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
521 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
522 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
523 | return -EINVAL; | |
d15c345f | 524 | |
95d4e6be PM |
525 | netlbl_netlink_auditinfo(skb, &audit_info); |
526 | ||
63c41688 | 527 | return netlbl_mgmt_add_common(info, &audit_info); |
d15c345f PM |
528 | } |
529 | ||
530 | /** | |
531 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message | |
532 | * @skb: the NETLINK buffer | |
533 | * @info: the Generic NETLINK info block | |
534 | * | |
535 | * Description: | |
536 | * Process a user generated REMOVEDEF message and remove the default domain | |
537 | * mapping. Returns zero on success, negative values on failure. | |
538 | * | |
539 | */ | |
540 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) | |
541 | { | |
95d4e6be PM |
542 | struct netlbl_audit audit_info; |
543 | ||
544 | netlbl_netlink_auditinfo(skb, &audit_info); | |
545 | ||
546 | return netlbl_domhsh_remove_default(&audit_info); | |
d15c345f PM |
547 | } |
548 | ||
549 | /** | |
550 | * netlbl_mgmt_listdef - Handle a LISTDEF message | |
551 | * @skb: the NETLINK buffer | |
552 | * @info: the Generic NETLINK info block | |
553 | * | |
554 | * Description: | |
555 | * Process a user generated LISTDEF message and dumps the default domain | |
556 | * mapping in a form suitable for use in a kernel generated LISTDEF message. | |
557 | * Returns zero on success, negative values on failure. | |
558 | * | |
559 | */ | |
560 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) | |
561 | { | |
562 | int ret_val = -ENOMEM; | |
fd385855 PM |
563 | struct sk_buff *ans_skb = NULL; |
564 | void *data; | |
565 | struct netlbl_dom_map *entry; | |
d15c345f | 566 | |
339bf98f | 567 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 568 | if (ans_skb == NULL) |
fd385855 | 569 | return -ENOMEM; |
17c157c8 TG |
570 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
571 | 0, NLBL_MGMT_C_LISTDEF); | |
fd385855 | 572 | if (data == NULL) |
d15c345f | 573 | goto listdef_failure; |
d15c345f | 574 | |
fd385855 PM |
575 | rcu_read_lock(); |
576 | entry = netlbl_domhsh_getentry(NULL); | |
577 | if (entry == NULL) { | |
578 | ret_val = -ENOENT; | |
579 | goto listdef_failure_lock; | |
580 | } | |
63c41688 | 581 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
fd385855 | 582 | rcu_read_unlock(); |
63c41688 PM |
583 | if (ret_val != 0) |
584 | goto listdef_failure; | |
d15c345f | 585 | |
fd385855 | 586 | genlmsg_end(ans_skb, data); |
fe785bee | 587 | return genlmsg_reply(ans_skb, info); |
d15c345f | 588 | |
fd385855 PM |
589 | listdef_failure_lock: |
590 | rcu_read_unlock(); | |
d15c345f | 591 | listdef_failure: |
fd385855 | 592 | kfree_skb(ans_skb); |
d15c345f PM |
593 | return ret_val; |
594 | } | |
595 | ||
596 | /** | |
fd385855 PM |
597 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
598 | * @skb: the skb to write to | |
fd385855 PM |
599 | * @cb: the NETLINK callback |
600 | * @protocol: the NetLabel protocol to use in the message | |
d15c345f PM |
601 | * |
602 | * Description: | |
fd385855 PM |
603 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
604 | * answer a application's PROTOCOLS message. Returns the size of the message | |
605 | * on success, negative values on failure. | |
d15c345f PM |
606 | * |
607 | */ | |
fd385855 PM |
608 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
609 | struct netlink_callback *cb, | |
610 | u32 protocol) | |
d15c345f PM |
611 | { |
612 | int ret_val = -ENOMEM; | |
fd385855 PM |
613 | void *data; |
614 | ||
17c157c8 TG |
615 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, |
616 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, | |
617 | NLBL_MGMT_C_PROTOCOLS); | |
fd385855 PM |
618 | if (data == NULL) |
619 | goto protocols_cb_failure; | |
620 | ||
621 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); | |
d15c345f | 622 | if (ret_val != 0) |
fd385855 | 623 | goto protocols_cb_failure; |
d15c345f | 624 | |
fd385855 | 625 | return genlmsg_end(skb, data); |
d15c345f | 626 | |
fd385855 PM |
627 | protocols_cb_failure: |
628 | genlmsg_cancel(skb, data); | |
d15c345f PM |
629 | return ret_val; |
630 | } | |
631 | ||
fd385855 PM |
632 | /** |
633 | * netlbl_mgmt_protocols - Handle a PROTOCOLS message | |
634 | * @skb: the NETLINK buffer | |
635 | * @cb: the NETLINK callback | |
636 | * | |
637 | * Description: | |
638 | * Process a user generated PROTOCOLS message and respond accordingly. | |
639 | * | |
640 | */ | |
641 | static int netlbl_mgmt_protocols(struct sk_buff *skb, | |
642 | struct netlink_callback *cb) | |
643 | { | |
644 | u32 protos_sent = cb->args[0]; | |
645 | ||
646 | if (protos_sent == 0) { | |
647 | if (netlbl_mgmt_protocols_cb(skb, | |
648 | cb, | |
649 | NETLBL_NLTYPE_UNLABELED) < 0) | |
650 | goto protocols_return; | |
651 | protos_sent++; | |
652 | } | |
653 | if (protos_sent == 1) { | |
654 | if (netlbl_mgmt_protocols_cb(skb, | |
655 | cb, | |
656 | NETLBL_NLTYPE_CIPSOV4) < 0) | |
657 | goto protocols_return; | |
658 | protos_sent++; | |
659 | } | |
660 | ||
661 | protocols_return: | |
662 | cb->args[0] = protos_sent; | |
663 | return skb->len; | |
664 | } | |
665 | ||
d15c345f PM |
666 | /** |
667 | * netlbl_mgmt_version - Handle a VERSION message | |
668 | * @skb: the NETLINK buffer | |
669 | * @info: the Generic NETLINK info block | |
670 | * | |
671 | * Description: | |
672 | * Process a user generated VERSION message and respond accordingly. Returns | |
673 | * zero on success, negative values on failure. | |
674 | * | |
675 | */ | |
676 | static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info) | |
677 | { | |
678 | int ret_val = -ENOMEM; | |
679 | struct sk_buff *ans_skb = NULL; | |
fd385855 | 680 | void *data; |
d15c345f | 681 | |
339bf98f | 682 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 683 | if (ans_skb == NULL) |
fd385855 | 684 | return -ENOMEM; |
17c157c8 TG |
685 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
686 | 0, NLBL_MGMT_C_VERSION); | |
fd385855 | 687 | if (data == NULL) |
d15c345f PM |
688 | goto version_failure; |
689 | ||
fd385855 PM |
690 | ret_val = nla_put_u32(ans_skb, |
691 | NLBL_MGMT_A_VERSION, | |
692 | NETLBL_PROTO_VERSION); | |
d15c345f PM |
693 | if (ret_val != 0) |
694 | goto version_failure; | |
695 | ||
fd385855 | 696 | genlmsg_end(ans_skb, data); |
fe785bee | 697 | return genlmsg_reply(ans_skb, info); |
d15c345f PM |
698 | |
699 | version_failure: | |
700 | kfree_skb(ans_skb); | |
d15c345f PM |
701 | return ret_val; |
702 | } | |
703 | ||
704 | ||
705 | /* | |
706 | * NetLabel Generic NETLINK Command Definitions | |
707 | */ | |
708 | ||
227c43c3 PE |
709 | static struct genl_ops netlbl_mgmt_genl_ops[] = { |
710 | { | |
d15c345f | 711 | .cmd = NLBL_MGMT_C_ADD, |
fd385855 PM |
712 | .flags = GENL_ADMIN_PERM, |
713 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
714 | .doit = netlbl_mgmt_add, |
715 | .dumpit = NULL, | |
227c43c3 PE |
716 | }, |
717 | { | |
d15c345f | 718 | .cmd = NLBL_MGMT_C_REMOVE, |
fd385855 PM |
719 | .flags = GENL_ADMIN_PERM, |
720 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
721 | .doit = netlbl_mgmt_remove, |
722 | .dumpit = NULL, | |
227c43c3 PE |
723 | }, |
724 | { | |
fd385855 | 725 | .cmd = NLBL_MGMT_C_LISTALL, |
d15c345f | 726 | .flags = 0, |
fd385855 PM |
727 | .policy = netlbl_mgmt_genl_policy, |
728 | .doit = NULL, | |
729 | .dumpit = netlbl_mgmt_listall, | |
227c43c3 PE |
730 | }, |
731 | { | |
d15c345f | 732 | .cmd = NLBL_MGMT_C_ADDDEF, |
fd385855 PM |
733 | .flags = GENL_ADMIN_PERM, |
734 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
735 | .doit = netlbl_mgmt_adddef, |
736 | .dumpit = NULL, | |
227c43c3 PE |
737 | }, |
738 | { | |
d15c345f | 739 | .cmd = NLBL_MGMT_C_REMOVEDEF, |
fd385855 PM |
740 | .flags = GENL_ADMIN_PERM, |
741 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
742 | .doit = netlbl_mgmt_removedef, |
743 | .dumpit = NULL, | |
227c43c3 PE |
744 | }, |
745 | { | |
d15c345f PM |
746 | .cmd = NLBL_MGMT_C_LISTDEF, |
747 | .flags = 0, | |
fd385855 | 748 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
749 | .doit = netlbl_mgmt_listdef, |
750 | .dumpit = NULL, | |
227c43c3 PE |
751 | }, |
752 | { | |
fd385855 | 753 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
d15c345f | 754 | .flags = 0, |
fd385855 PM |
755 | .policy = netlbl_mgmt_genl_policy, |
756 | .doit = NULL, | |
757 | .dumpit = netlbl_mgmt_protocols, | |
227c43c3 PE |
758 | }, |
759 | { | |
d15c345f PM |
760 | .cmd = NLBL_MGMT_C_VERSION, |
761 | .flags = 0, | |
fd385855 | 762 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
763 | .doit = netlbl_mgmt_version, |
764 | .dumpit = NULL, | |
227c43c3 | 765 | }, |
d15c345f PM |
766 | }; |
767 | ||
768 | /* | |
769 | * NetLabel Generic NETLINK Protocol Functions | |
770 | */ | |
771 | ||
772 | /** | |
773 | * netlbl_mgmt_genl_init - Register the NetLabel management component | |
774 | * | |
775 | * Description: | |
776 | * Register the NetLabel management component with the Generic NETLINK | |
777 | * mechanism. Returns zero on success, negative values on failure. | |
778 | * | |
779 | */ | |
05705e4e | 780 | int __init netlbl_mgmt_genl_init(void) |
d15c345f | 781 | { |
7ae740df MM |
782 | return genl_register_family_with_ops(&netlbl_mgmt_gnl_family, |
783 | netlbl_mgmt_genl_ops, ARRAY_SIZE(netlbl_mgmt_genl_ops)); | |
d15c345f | 784 | } |