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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 | |
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> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
d15c345f PM |
38 | #include <net/sock.h> |
39 | #include <net/netlink.h> | |
40 | #include <net/genetlink.h> | |
63c41688 PM |
41 | #include <net/ip.h> |
42 | #include <net/ipv6.h> | |
d15c345f PM |
43 | #include <net/netlabel.h> |
44 | #include <net/cipso_ipv4.h> | |
60063497 | 45 | #include <linux/atomic.h> |
d15c345f PM |
46 | |
47 | #include "netlabel_domainhash.h" | |
48 | #include "netlabel_user.h" | |
49 | #include "netlabel_mgmt.h" | |
50 | ||
c783f1ce PM |
51 | /* NetLabel configured protocol counter */ |
52 | atomic_t netlabel_mgmt_protocount = ATOMIC_INIT(0); | |
23bcdc1a | 53 | |
fd385855 PM |
54 | /* Argument struct for netlbl_domhsh_walk() */ |
55 | struct netlbl_domhsh_walk_arg { | |
56 | struct netlink_callback *nl_cb; | |
57 | struct sk_buff *skb; | |
58 | u32 seq; | |
59 | }; | |
60 | ||
d15c345f PM |
61 | /* NetLabel Generic NETLINK CIPSOv4 family */ |
62 | static struct genl_family netlbl_mgmt_gnl_family = { | |
63 | .id = GENL_ID_GENERATE, | |
64 | .hdrsize = 0, | |
65 | .name = NETLBL_NLTYPE_MGMT_NAME, | |
66 | .version = NETLBL_PROTO_VERSION, | |
fd385855 | 67 | .maxattr = NLBL_MGMT_A_MAX, |
d15c345f PM |
68 | }; |
69 | ||
fd385855 | 70 | /* NetLabel Netlink attribute policy */ |
ef7c79ed | 71 | static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = { |
fd385855 PM |
72 | [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING }, |
73 | [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 }, | |
74 | [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 }, | |
75 | [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 }, | |
76 | }; | |
d15c345f PM |
77 | |
78 | /* | |
63c41688 | 79 | * Helper Functions |
d15c345f PM |
80 | */ |
81 | ||
82 | /** | |
83 | * netlbl_mgmt_add - Handle an ADD message | |
d15c345f | 84 | * @info: the Generic NETLINK info block |
63c41688 | 85 | * @audit_info: NetLabel audit information |
d15c345f PM |
86 | * |
87 | * Description: | |
63c41688 PM |
88 | * Helper function for the ADD and ADDDEF messages to add the domain mappings |
89 | * from the message to the hash table. See netlabel.h for a description of the | |
90 | * message format. Returns zero on success, negative values on failure. | |
d15c345f PM |
91 | * |
92 | */ | |
63c41688 PM |
93 | static int netlbl_mgmt_add_common(struct genl_info *info, |
94 | struct netlbl_audit *audit_info) | |
d15c345f PM |
95 | { |
96 | int ret_val = -EINVAL; | |
d15c345f | 97 | struct netlbl_dom_map *entry = NULL; |
63c41688 PM |
98 | struct netlbl_domaddr_map *addrmap = NULL; |
99 | struct cipso_v4_doi *cipsov4 = NULL; | |
d15c345f | 100 | u32 tmp_val; |
95d4e6be | 101 | |
fd385855 PM |
102 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
103 | if (entry == NULL) { | |
104 | ret_val = -ENOMEM; | |
105 | goto add_failure; | |
106 | } | |
6a8b7f0c | 107 | entry->def.type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); |
63c41688 PM |
108 | if (info->attrs[NLBL_MGMT_A_DOMAIN]) { |
109 | size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]); | |
110 | entry->domain = kmalloc(tmp_size, GFP_KERNEL); | |
111 | if (entry->domain == NULL) { | |
112 | ret_val = -ENOMEM; | |
113 | goto add_failure; | |
114 | } | |
115 | nla_strlcpy(entry->domain, | |
116 | info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size); | |
117 | } | |
118 | ||
6a8b7f0c | 119 | /* NOTE: internally we allow/use a entry->def.type value of |
63c41688 PM |
120 | * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users |
121 | * to pass that as a protocol value because we need to know the | |
122 | * "real" protocol */ | |
d15c345f | 123 | |
6a8b7f0c | 124 | switch (entry->def.type) { |
fd385855 | 125 | case NETLBL_NLTYPE_UNLABELED: |
fd385855 PM |
126 | break; |
127 | case NETLBL_NLTYPE_CIPSOV4: | |
128 | if (!info->attrs[NLBL_MGMT_A_CV4DOI]) | |
d15c345f | 129 | goto add_failure; |
d15c345f | 130 | |
fd385855 | 131 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]); |
63c41688 PM |
132 | cipsov4 = cipso_v4_doi_getdef(tmp_val); |
133 | if (cipsov4 == NULL) | |
d15c345f | 134 | goto add_failure; |
6a8b7f0c | 135 | entry->def.cipso = cipsov4; |
fd385855 PM |
136 | break; |
137 | default: | |
138 | goto add_failure; | |
d15c345f | 139 | } |
63c41688 PM |
140 | |
141 | if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) { | |
142 | struct in_addr *addr; | |
143 | struct in_addr *mask; | |
144 | struct netlbl_domaddr4_map *map; | |
145 | ||
146 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
147 | if (addrmap == NULL) { | |
148 | ret_val = -ENOMEM; | |
149 | goto add_failure; | |
150 | } | |
151 | INIT_LIST_HEAD(&addrmap->list4); | |
152 | INIT_LIST_HEAD(&addrmap->list6); | |
153 | ||
154 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) != | |
155 | sizeof(struct in_addr)) { | |
156 | ret_val = -EINVAL; | |
157 | goto add_failure; | |
158 | } | |
159 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) != | |
160 | sizeof(struct in_addr)) { | |
161 | ret_val = -EINVAL; | |
162 | goto add_failure; | |
163 | } | |
164 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]); | |
165 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]); | |
166 | ||
167 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
168 | if (map == NULL) { | |
169 | ret_val = -ENOMEM; | |
170 | goto add_failure; | |
171 | } | |
172 | map->list.addr = addr->s_addr & mask->s_addr; | |
173 | map->list.mask = mask->s_addr; | |
174 | map->list.valid = 1; | |
6a8b7f0c | 175 | map->def.type = entry->def.type; |
63c41688 | 176 | if (cipsov4) |
6a8b7f0c | 177 | map->def.cipso = cipsov4; |
63c41688 PM |
178 | |
179 | ret_val = netlbl_af4list_add(&map->list, &addrmap->list4); | |
180 | if (ret_val != 0) { | |
181 | kfree(map); | |
182 | goto add_failure; | |
183 | } | |
184 | ||
6a8b7f0c PM |
185 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
186 | entry->def.addrsel = addrmap; | |
dfd56b8b | 187 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
188 | } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) { |
189 | struct in6_addr *addr; | |
190 | struct in6_addr *mask; | |
191 | struct netlbl_domaddr6_map *map; | |
192 | ||
193 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
194 | if (addrmap == NULL) { | |
195 | ret_val = -ENOMEM; | |
196 | goto add_failure; | |
197 | } | |
198 | INIT_LIST_HEAD(&addrmap->list4); | |
199 | INIT_LIST_HEAD(&addrmap->list6); | |
200 | ||
201 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) != | |
202 | sizeof(struct in6_addr)) { | |
203 | ret_val = -EINVAL; | |
204 | goto add_failure; | |
205 | } | |
206 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) != | |
207 | sizeof(struct in6_addr)) { | |
208 | ret_val = -EINVAL; | |
209 | goto add_failure; | |
210 | } | |
211 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]); | |
212 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]); | |
213 | ||
214 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
215 | if (map == NULL) { | |
216 | ret_val = -ENOMEM; | |
217 | goto add_failure; | |
218 | } | |
4e3fd7a0 | 219 | map->list.addr = *addr; |
63c41688 PM |
220 | map->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; |
221 | map->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; | |
222 | map->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; | |
223 | map->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; | |
4e3fd7a0 | 224 | map->list.mask = *mask; |
63c41688 | 225 | map->list.valid = 1; |
6a8b7f0c | 226 | map->def.type = entry->def.type; |
63c41688 PM |
227 | |
228 | ret_val = netlbl_af6list_add(&map->list, &addrmap->list6); | |
229 | if (ret_val != 0) { | |
230 | kfree(map); | |
231 | goto add_failure; | |
232 | } | |
233 | ||
6a8b7f0c PM |
234 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
235 | entry->def.addrsel = addrmap; | |
63c41688 PM |
236 | #endif /* IPv6 */ |
237 | } | |
238 | ||
239 | ret_val = netlbl_domhsh_add(entry, audit_info); | |
fd385855 PM |
240 | if (ret_val != 0) |
241 | goto add_failure; | |
d15c345f | 242 | |
d15c345f PM |
243 | return 0; |
244 | ||
245 | add_failure: | |
63c41688 PM |
246 | if (cipsov4) |
247 | cipso_v4_doi_putdef(cipsov4); | |
d15c345f PM |
248 | if (entry) |
249 | kfree(entry->domain); | |
63c41688 | 250 | kfree(addrmap); |
d15c345f | 251 | kfree(entry); |
d15c345f PM |
252 | return ret_val; |
253 | } | |
254 | ||
63c41688 PM |
255 | /** |
256 | * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry | |
257 | * @skb: the NETLINK buffer | |
258 | * @entry: the map entry | |
259 | * | |
260 | * Description: | |
261 | * This function is a helper function used by the LISTALL and LISTDEF command | |
25985edc | 262 | * handlers. The caller is responsible for ensuring that the RCU read lock |
63c41688 PM |
263 | * is held. Returns zero on success, negative values on failure. |
264 | * | |
265 | */ | |
266 | static int netlbl_mgmt_listentry(struct sk_buff *skb, | |
267 | struct netlbl_dom_map *entry) | |
268 | { | |
f8a02479 | 269 | int ret_val = 0; |
63c41688 PM |
270 | struct nlattr *nla_a; |
271 | struct nlattr *nla_b; | |
272 | struct netlbl_af4list *iter4; | |
dfd56b8b | 273 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
274 | struct netlbl_af6list *iter6; |
275 | #endif | |
276 | ||
277 | if (entry->domain != NULL) { | |
278 | ret_val = nla_put_string(skb, | |
279 | NLBL_MGMT_A_DOMAIN, entry->domain); | |
280 | if (ret_val != 0) | |
281 | return ret_val; | |
282 | } | |
283 | ||
6a8b7f0c | 284 | switch (entry->def.type) { |
63c41688 PM |
285 | case NETLBL_NLTYPE_ADDRSELECT: |
286 | nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST); | |
287 | if (nla_a == NULL) | |
288 | return -ENOMEM; | |
289 | ||
6a8b7f0c | 290 | netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) { |
63c41688 PM |
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, | |
6a8b7f0c | 312 | map4->def.type); |
63c41688 PM |
313 | if (ret_val != 0) |
314 | return ret_val; | |
6a8b7f0c | 315 | switch (map4->def.type) { |
63c41688 PM |
316 | case NETLBL_NLTYPE_CIPSOV4: |
317 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 318 | map4->def.cipso->doi); |
63c41688 PM |
319 | if (ret_val != 0) |
320 | return ret_val; | |
321 | break; | |
322 | } | |
323 | ||
324 | nla_nest_end(skb, nla_b); | |
325 | } | |
dfd56b8b | 326 | #if IS_ENABLED(CONFIG_IPV6) |
6a8b7f0c | 327 | netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { |
63c41688 PM |
328 | struct netlbl_domaddr6_map *map6; |
329 | ||
330 | nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR); | |
331 | if (nla_b == NULL) | |
332 | return -ENOMEM; | |
333 | ||
334 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR, | |
335 | sizeof(struct in6_addr), | |
336 | &iter6->addr); | |
337 | if (ret_val != 0) | |
338 | return ret_val; | |
339 | ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK, | |
340 | sizeof(struct in6_addr), | |
341 | &iter6->mask); | |
342 | if (ret_val != 0) | |
343 | return ret_val; | |
344 | map6 = netlbl_domhsh_addr6_entry(iter6); | |
345 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 346 | map6->def.type); |
63c41688 PM |
347 | if (ret_val != 0) |
348 | return ret_val; | |
349 | ||
350 | nla_nest_end(skb, nla_b); | |
351 | } | |
352 | #endif /* IPv6 */ | |
353 | ||
354 | nla_nest_end(skb, nla_a); | |
355 | break; | |
356 | case NETLBL_NLTYPE_UNLABELED: | |
6a8b7f0c | 357 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
358 | break; |
359 | case NETLBL_NLTYPE_CIPSOV4: | |
6a8b7f0c | 360 | ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type); |
63c41688 PM |
361 | if (ret_val != 0) |
362 | return ret_val; | |
363 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 364 | entry->def.cipso->doi); |
63c41688 PM |
365 | break; |
366 | } | |
367 | ||
368 | return ret_val; | |
369 | } | |
370 | ||
371 | /* | |
372 | * NetLabel Command Handlers | |
373 | */ | |
374 | ||
375 | /** | |
376 | * netlbl_mgmt_add - Handle an ADD message | |
377 | * @skb: the NETLINK buffer | |
378 | * @info: the Generic NETLINK info block | |
379 | * | |
380 | * Description: | |
381 | * Process a user generated ADD message and add the domains from the message | |
382 | * to the hash table. See netlabel.h for a description of the message format. | |
383 | * Returns zero on success, negative values on failure. | |
384 | * | |
385 | */ | |
386 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) | |
387 | { | |
388 | struct netlbl_audit audit_info; | |
389 | ||
390 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || | |
391 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || | |
392 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
393 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
394 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
395 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
396 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
397 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
398 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
399 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
400 | return -EINVAL; | |
401 | ||
402 | netlbl_netlink_auditinfo(skb, &audit_info); | |
403 | ||
404 | return netlbl_mgmt_add_common(info, &audit_info); | |
405 | } | |
406 | ||
d15c345f PM |
407 | /** |
408 | * netlbl_mgmt_remove - Handle a REMOVE message | |
409 | * @skb: the NETLINK buffer | |
410 | * @info: the Generic NETLINK info block | |
411 | * | |
412 | * Description: | |
413 | * Process a user generated REMOVE message and remove the specified domain | |
414 | * mappings. Returns zero on success, negative values on failure. | |
415 | * | |
416 | */ | |
417 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) | |
418 | { | |
fd385855 | 419 | char *domain; |
95d4e6be | 420 | struct netlbl_audit audit_info; |
d15c345f | 421 | |
fd385855 PM |
422 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
423 | return -EINVAL; | |
d15c345f | 424 | |
95d4e6be PM |
425 | netlbl_netlink_auditinfo(skb, &audit_info); |
426 | ||
fd385855 | 427 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
95d4e6be | 428 | return netlbl_domhsh_remove(domain, &audit_info); |
fd385855 PM |
429 | } |
430 | ||
431 | /** | |
432 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL | |
433 | * @entry: the domain mapping hash table entry | |
434 | * @arg: the netlbl_domhsh_walk_arg structure | |
435 | * | |
436 | * Description: | |
437 | * This function is designed to be used as a callback to the | |
438 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL | |
439 | * message. Returns the size of the message on success, negative values on | |
440 | * failure. | |
441 | * | |
442 | */ | |
443 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) | |
444 | { | |
445 | int ret_val = -ENOMEM; | |
446 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
447 | void *data; | |
448 | ||
15e47304 | 449 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, |
17c157c8 TG |
450 | cb_arg->seq, &netlbl_mgmt_gnl_family, |
451 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); | |
fd385855 PM |
452 | if (data == NULL) |
453 | goto listall_cb_failure; | |
454 | ||
63c41688 | 455 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
fd385855 PM |
456 | if (ret_val != 0) |
457 | goto listall_cb_failure; | |
d15c345f | 458 | |
fd385855 PM |
459 | cb_arg->seq++; |
460 | return genlmsg_end(cb_arg->skb, data); | |
d15c345f | 461 | |
fd385855 PM |
462 | listall_cb_failure: |
463 | genlmsg_cancel(cb_arg->skb, data); | |
d15c345f PM |
464 | return ret_val; |
465 | } | |
466 | ||
467 | /** | |
fd385855 | 468 | * netlbl_mgmt_listall - Handle a LISTALL message |
d15c345f | 469 | * @skb: the NETLINK buffer |
fd385855 | 470 | * @cb: the NETLINK callback |
d15c345f PM |
471 | * |
472 | * Description: | |
fd385855 PM |
473 | * Process a user generated LISTALL message and dumps the domain hash table in |
474 | * a form suitable for use in a kernel generated LISTALL message. Returns zero | |
475 | * on success, negative values on failure. | |
d15c345f PM |
476 | * |
477 | */ | |
fd385855 PM |
478 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
479 | struct netlink_callback *cb) | |
d15c345f | 480 | { |
fd385855 PM |
481 | struct netlbl_domhsh_walk_arg cb_arg; |
482 | u32 skip_bkt = cb->args[0]; | |
483 | u32 skip_chain = cb->args[1]; | |
484 | ||
485 | cb_arg.nl_cb = cb; | |
486 | cb_arg.skb = skb; | |
487 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
488 | ||
489 | netlbl_domhsh_walk(&skip_bkt, | |
490 | &skip_chain, | |
491 | netlbl_mgmt_listall_cb, | |
492 | &cb_arg); | |
493 | ||
494 | cb->args[0] = skip_bkt; | |
495 | cb->args[1] = skip_chain; | |
496 | return skb->len; | |
d15c345f PM |
497 | } |
498 | ||
499 | /** | |
500 | * netlbl_mgmt_adddef - Handle an ADDDEF message | |
501 | * @skb: the NETLINK buffer | |
502 | * @info: the Generic NETLINK info block | |
503 | * | |
504 | * Description: | |
505 | * Process a user generated ADDDEF message and respond accordingly. Returns | |
506 | * zero on success, negative values on failure. | |
507 | * | |
508 | */ | |
509 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) | |
510 | { | |
95d4e6be | 511 | struct netlbl_audit audit_info; |
d15c345f | 512 | |
63c41688 PM |
513 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
514 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
515 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
516 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
517 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
518 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
519 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
520 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
521 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
522 | return -EINVAL; | |
d15c345f | 523 | |
95d4e6be PM |
524 | netlbl_netlink_auditinfo(skb, &audit_info); |
525 | ||
63c41688 | 526 | return netlbl_mgmt_add_common(info, &audit_info); |
d15c345f PM |
527 | } |
528 | ||
529 | /** | |
530 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message | |
531 | * @skb: the NETLINK buffer | |
532 | * @info: the Generic NETLINK info block | |
533 | * | |
534 | * Description: | |
535 | * Process a user generated REMOVEDEF message and remove the default domain | |
536 | * mapping. Returns zero on success, negative values on failure. | |
537 | * | |
538 | */ | |
539 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) | |
540 | { | |
95d4e6be PM |
541 | struct netlbl_audit audit_info; |
542 | ||
543 | netlbl_netlink_auditinfo(skb, &audit_info); | |
544 | ||
545 | return netlbl_domhsh_remove_default(&audit_info); | |
d15c345f PM |
546 | } |
547 | ||
548 | /** | |
549 | * netlbl_mgmt_listdef - Handle a LISTDEF message | |
550 | * @skb: the NETLINK buffer | |
551 | * @info: the Generic NETLINK info block | |
552 | * | |
553 | * Description: | |
554 | * Process a user generated LISTDEF message and dumps the default domain | |
555 | * mapping in a form suitable for use in a kernel generated LISTDEF message. | |
556 | * Returns zero on success, negative values on failure. | |
557 | * | |
558 | */ | |
559 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) | |
560 | { | |
561 | int ret_val = -ENOMEM; | |
fd385855 PM |
562 | struct sk_buff *ans_skb = NULL; |
563 | void *data; | |
564 | struct netlbl_dom_map *entry; | |
d15c345f | 565 | |
339bf98f | 566 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 567 | if (ans_skb == NULL) |
fd385855 | 568 | return -ENOMEM; |
17c157c8 TG |
569 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
570 | 0, NLBL_MGMT_C_LISTDEF); | |
fd385855 | 571 | if (data == NULL) |
d15c345f | 572 | goto listdef_failure; |
d15c345f | 573 | |
fd385855 PM |
574 | rcu_read_lock(); |
575 | entry = netlbl_domhsh_getentry(NULL); | |
576 | if (entry == NULL) { | |
577 | ret_val = -ENOENT; | |
578 | goto listdef_failure_lock; | |
579 | } | |
63c41688 | 580 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
fd385855 | 581 | rcu_read_unlock(); |
63c41688 PM |
582 | if (ret_val != 0) |
583 | goto listdef_failure; | |
d15c345f | 584 | |
fd385855 | 585 | genlmsg_end(ans_skb, data); |
fe785bee | 586 | return genlmsg_reply(ans_skb, info); |
d15c345f | 587 | |
fd385855 PM |
588 | listdef_failure_lock: |
589 | rcu_read_unlock(); | |
d15c345f | 590 | listdef_failure: |
fd385855 | 591 | kfree_skb(ans_skb); |
d15c345f PM |
592 | return ret_val; |
593 | } | |
594 | ||
595 | /** | |
fd385855 PM |
596 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
597 | * @skb: the skb to write to | |
fd385855 PM |
598 | * @cb: the NETLINK callback |
599 | * @protocol: the NetLabel protocol to use in the message | |
d15c345f PM |
600 | * |
601 | * Description: | |
fd385855 PM |
602 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
603 | * answer a application's PROTOCOLS message. Returns the size of the message | |
604 | * on success, negative values on failure. | |
d15c345f PM |
605 | * |
606 | */ | |
fd385855 PM |
607 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
608 | struct netlink_callback *cb, | |
609 | u32 protocol) | |
d15c345f PM |
610 | { |
611 | int ret_val = -ENOMEM; | |
fd385855 PM |
612 | void *data; |
613 | ||
15e47304 | 614 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
17c157c8 TG |
615 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, |
616 | NLBL_MGMT_C_PROTOCOLS); | |
fd385855 PM |
617 | if (data == NULL) |
618 | goto protocols_cb_failure; | |
619 | ||
620 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); | |
d15c345f | 621 | if (ret_val != 0) |
fd385855 | 622 | goto protocols_cb_failure; |
d15c345f | 623 | |
fd385855 | 624 | return genlmsg_end(skb, data); |
d15c345f | 625 | |
fd385855 PM |
626 | protocols_cb_failure: |
627 | genlmsg_cancel(skb, data); | |
d15c345f PM |
628 | return ret_val; |
629 | } | |
630 | ||
fd385855 PM |
631 | /** |
632 | * netlbl_mgmt_protocols - Handle a PROTOCOLS message | |
633 | * @skb: the NETLINK buffer | |
634 | * @cb: the NETLINK callback | |
635 | * | |
636 | * Description: | |
637 | * Process a user generated PROTOCOLS message and respond accordingly. | |
638 | * | |
639 | */ | |
640 | static int netlbl_mgmt_protocols(struct sk_buff *skb, | |
641 | struct netlink_callback *cb) | |
642 | { | |
643 | u32 protos_sent = cb->args[0]; | |
644 | ||
645 | if (protos_sent == 0) { | |
646 | if (netlbl_mgmt_protocols_cb(skb, | |
647 | cb, | |
648 | NETLBL_NLTYPE_UNLABELED) < 0) | |
649 | goto protocols_return; | |
650 | protos_sent++; | |
651 | } | |
652 | if (protos_sent == 1) { | |
653 | if (netlbl_mgmt_protocols_cb(skb, | |
654 | cb, | |
655 | NETLBL_NLTYPE_CIPSOV4) < 0) | |
656 | goto protocols_return; | |
657 | protos_sent++; | |
658 | } | |
659 | ||
660 | protocols_return: | |
661 | cb->args[0] = protos_sent; | |
662 | return skb->len; | |
663 | } | |
664 | ||
d15c345f PM |
665 | /** |
666 | * netlbl_mgmt_version - Handle a VERSION message | |
667 | * @skb: the NETLINK buffer | |
668 | * @info: the Generic NETLINK info block | |
669 | * | |
670 | * Description: | |
671 | * Process a user generated VERSION message and respond accordingly. Returns | |
672 | * zero on success, negative values on failure. | |
673 | * | |
674 | */ | |
675 | static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info) | |
676 | { | |
677 | int ret_val = -ENOMEM; | |
678 | struct sk_buff *ans_skb = NULL; | |
fd385855 | 679 | void *data; |
d15c345f | 680 | |
339bf98f | 681 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 682 | if (ans_skb == NULL) |
fd385855 | 683 | return -ENOMEM; |
17c157c8 TG |
684 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
685 | 0, NLBL_MGMT_C_VERSION); | |
fd385855 | 686 | if (data == NULL) |
d15c345f PM |
687 | goto version_failure; |
688 | ||
fd385855 PM |
689 | ret_val = nla_put_u32(ans_skb, |
690 | NLBL_MGMT_A_VERSION, | |
691 | NETLBL_PROTO_VERSION); | |
d15c345f PM |
692 | if (ret_val != 0) |
693 | goto version_failure; | |
694 | ||
fd385855 | 695 | genlmsg_end(ans_skb, data); |
fe785bee | 696 | return genlmsg_reply(ans_skb, info); |
d15c345f PM |
697 | |
698 | version_failure: | |
699 | kfree_skb(ans_skb); | |
d15c345f PM |
700 | return ret_val; |
701 | } | |
702 | ||
703 | ||
704 | /* | |
705 | * NetLabel Generic NETLINK Command Definitions | |
706 | */ | |
707 | ||
4534de83 | 708 | static const struct genl_ops netlbl_mgmt_genl_ops[] = { |
227c43c3 | 709 | { |
d15c345f | 710 | .cmd = NLBL_MGMT_C_ADD, |
fd385855 PM |
711 | .flags = GENL_ADMIN_PERM, |
712 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
713 | .doit = netlbl_mgmt_add, |
714 | .dumpit = NULL, | |
227c43c3 PE |
715 | }, |
716 | { | |
d15c345f | 717 | .cmd = NLBL_MGMT_C_REMOVE, |
fd385855 PM |
718 | .flags = GENL_ADMIN_PERM, |
719 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
720 | .doit = netlbl_mgmt_remove, |
721 | .dumpit = NULL, | |
227c43c3 PE |
722 | }, |
723 | { | |
fd385855 | 724 | .cmd = NLBL_MGMT_C_LISTALL, |
d15c345f | 725 | .flags = 0, |
fd385855 PM |
726 | .policy = netlbl_mgmt_genl_policy, |
727 | .doit = NULL, | |
728 | .dumpit = netlbl_mgmt_listall, | |
227c43c3 PE |
729 | }, |
730 | { | |
d15c345f | 731 | .cmd = NLBL_MGMT_C_ADDDEF, |
fd385855 PM |
732 | .flags = GENL_ADMIN_PERM, |
733 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
734 | .doit = netlbl_mgmt_adddef, |
735 | .dumpit = NULL, | |
227c43c3 PE |
736 | }, |
737 | { | |
d15c345f | 738 | .cmd = NLBL_MGMT_C_REMOVEDEF, |
fd385855 PM |
739 | .flags = GENL_ADMIN_PERM, |
740 | .policy = netlbl_mgmt_genl_policy, | |
d15c345f PM |
741 | .doit = netlbl_mgmt_removedef, |
742 | .dumpit = NULL, | |
227c43c3 PE |
743 | }, |
744 | { | |
d15c345f PM |
745 | .cmd = NLBL_MGMT_C_LISTDEF, |
746 | .flags = 0, | |
fd385855 | 747 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
748 | .doit = netlbl_mgmt_listdef, |
749 | .dumpit = NULL, | |
227c43c3 PE |
750 | }, |
751 | { | |
fd385855 | 752 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
d15c345f | 753 | .flags = 0, |
fd385855 PM |
754 | .policy = netlbl_mgmt_genl_policy, |
755 | .doit = NULL, | |
756 | .dumpit = netlbl_mgmt_protocols, | |
227c43c3 PE |
757 | }, |
758 | { | |
d15c345f PM |
759 | .cmd = NLBL_MGMT_C_VERSION, |
760 | .flags = 0, | |
fd385855 | 761 | .policy = netlbl_mgmt_genl_policy, |
d15c345f PM |
762 | .doit = netlbl_mgmt_version, |
763 | .dumpit = NULL, | |
227c43c3 | 764 | }, |
d15c345f PM |
765 | }; |
766 | ||
767 | /* | |
768 | * NetLabel Generic NETLINK Protocol Functions | |
769 | */ | |
770 | ||
771 | /** | |
772 | * netlbl_mgmt_genl_init - Register the NetLabel management component | |
773 | * | |
774 | * Description: | |
775 | * Register the NetLabel management component with the Generic NETLINK | |
776 | * mechanism. Returns zero on success, negative values on failure. | |
777 | * | |
778 | */ | |
05705e4e | 779 | int __init netlbl_mgmt_genl_init(void) |
d15c345f | 780 | { |
7ae740df | 781 | return genl_register_family_with_ops(&netlbl_mgmt_gnl_family, |
c53ed742 | 782 | netlbl_mgmt_genl_ops); |
d15c345f | 783 | } |