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1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d15c345f PM |
2 | /* |
3 | * NetLabel Management Support | |
4 | * | |
5 | * This file defines the management functions for the NetLabel system. The | |
6 | * NetLabel system manages static and dynamic label mappings for network | |
7 | * protocols such as CIPSO and RIPSO. | |
8 | * | |
82c21bfa | 9 | * Author: Paul Moore <paul@paul-moore.com> |
d15c345f PM |
10 | */ |
11 | ||
12 | /* | |
63c41688 | 13 | * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 |
d15c345f PM |
14 | */ |
15 | ||
16 | #include <linux/types.h> | |
17 | #include <linux/socket.h> | |
18 | #include <linux/string.h> | |
19 | #include <linux/skbuff.h> | |
63c41688 PM |
20 | #include <linux/in.h> |
21 | #include <linux/in6.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
d15c345f PM |
23 | #include <net/sock.h> |
24 | #include <net/netlink.h> | |
25 | #include <net/genetlink.h> | |
63c41688 PM |
26 | #include <net/ip.h> |
27 | #include <net/ipv6.h> | |
d15c345f PM |
28 | #include <net/netlabel.h> |
29 | #include <net/cipso_ipv4.h> | |
dc7de73f | 30 | #include <net/calipso.h> |
60063497 | 31 | #include <linux/atomic.h> |
d15c345f | 32 | |
dc7de73f | 33 | #include "netlabel_calipso.h" |
d15c345f PM |
34 | #include "netlabel_domainhash.h" |
35 | #include "netlabel_user.h" | |
36 | #include "netlabel_mgmt.h" | |
37 | ||
c783f1ce PM |
38 | /* NetLabel configured protocol counter */ |
39 | atomic_t netlabel_mgmt_protocount = ATOMIC_INIT(0); | |
23bcdc1a | 40 | |
fd385855 PM |
41 | /* Argument struct for netlbl_domhsh_walk() */ |
42 | struct netlbl_domhsh_walk_arg { | |
43 | struct netlink_callback *nl_cb; | |
44 | struct sk_buff *skb; | |
45 | u32 seq; | |
46 | }; | |
47 | ||
d15c345f | 48 | /* NetLabel Generic NETLINK CIPSOv4 family */ |
489111e5 | 49 | static struct genl_family netlbl_mgmt_gnl_family; |
d15c345f | 50 | |
fd385855 | 51 | /* NetLabel Netlink attribute policy */ |
ef7c79ed | 52 | static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = { |
fd385855 PM |
53 | [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING }, |
54 | [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 }, | |
55 | [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 }, | |
56 | [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 }, | |
8f18e675 | 57 | [NLBL_MGMT_A_FAMILY] = { .type = NLA_U16 }, |
dc7de73f | 58 | [NLBL_MGMT_A_CLPDOI] = { .type = NLA_U32 }, |
fd385855 | 59 | }; |
d15c345f PM |
60 | |
61 | /* | |
63c41688 | 62 | * Helper Functions |
d15c345f PM |
63 | */ |
64 | ||
65 | /** | |
3ba937fb | 66 | * netlbl_mgmt_add_common - Handle an ADD message |
d15c345f | 67 | * @info: the Generic NETLINK info block |
63c41688 | 68 | * @audit_info: NetLabel audit information |
d15c345f PM |
69 | * |
70 | * Description: | |
63c41688 PM |
71 | * Helper function for the ADD and ADDDEF messages to add the domain mappings |
72 | * from the message to the hash table. See netlabel.h for a description of the | |
73 | * message format. Returns zero on success, negative values on failure. | |
d15c345f PM |
74 | * |
75 | */ | |
63c41688 PM |
76 | static int netlbl_mgmt_add_common(struct genl_info *info, |
77 | struct netlbl_audit *audit_info) | |
d15c345f | 78 | { |
b8f6b052 | 79 | void *pmap = NULL; |
d15c345f | 80 | int ret_val = -EINVAL; |
63c41688 PM |
81 | struct netlbl_domaddr_map *addrmap = NULL; |
82 | struct cipso_v4_doi *cipsov4 = NULL; | |
dc7de73f HD |
83 | #if IS_ENABLED(CONFIG_IPV6) |
84 | struct calipso_doi *calipso = NULL; | |
85 | #endif | |
d15c345f | 86 | u32 tmp_val; |
4de46d5e | 87 | struct netlbl_dom_map *entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
95d4e6be | 88 | |
4de46d5e ME |
89 | if (!entry) |
90 | return -ENOMEM; | |
6a8b7f0c | 91 | entry->def.type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); |
63c41688 PM |
92 | if (info->attrs[NLBL_MGMT_A_DOMAIN]) { |
93 | size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]); | |
94 | entry->domain = kmalloc(tmp_size, GFP_KERNEL); | |
95 | if (entry->domain == NULL) { | |
96 | ret_val = -ENOMEM; | |
4de46d5e | 97 | goto add_free_entry; |
63c41688 | 98 | } |
872f6903 | 99 | nla_strscpy(entry->domain, |
63c41688 PM |
100 | info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size); |
101 | } | |
102 | ||
6a8b7f0c | 103 | /* NOTE: internally we allow/use a entry->def.type value of |
63c41688 PM |
104 | * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users |
105 | * to pass that as a protocol value because we need to know the | |
106 | * "real" protocol */ | |
d15c345f | 107 | |
6a8b7f0c | 108 | switch (entry->def.type) { |
fd385855 | 109 | case NETLBL_NLTYPE_UNLABELED: |
8f18e675 HD |
110 | if (info->attrs[NLBL_MGMT_A_FAMILY]) |
111 | entry->family = | |
112 | nla_get_u16(info->attrs[NLBL_MGMT_A_FAMILY]); | |
113 | else | |
114 | entry->family = AF_UNSPEC; | |
fd385855 PM |
115 | break; |
116 | case NETLBL_NLTYPE_CIPSOV4: | |
117 | if (!info->attrs[NLBL_MGMT_A_CV4DOI]) | |
4de46d5e | 118 | goto add_free_domain; |
d15c345f | 119 | |
fd385855 | 120 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]); |
63c41688 PM |
121 | cipsov4 = cipso_v4_doi_getdef(tmp_val); |
122 | if (cipsov4 == NULL) | |
4de46d5e | 123 | goto add_free_domain; |
8f18e675 | 124 | entry->family = AF_INET; |
6a8b7f0c | 125 | entry->def.cipso = cipsov4; |
fd385855 | 126 | break; |
dc7de73f HD |
127 | #if IS_ENABLED(CONFIG_IPV6) |
128 | case NETLBL_NLTYPE_CALIPSO: | |
129 | if (!info->attrs[NLBL_MGMT_A_CLPDOI]) | |
130 | goto add_free_domain; | |
131 | ||
132 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CLPDOI]); | |
133 | calipso = calipso_doi_getdef(tmp_val); | |
134 | if (calipso == NULL) | |
135 | goto add_free_domain; | |
136 | entry->family = AF_INET6; | |
137 | entry->def.calipso = calipso; | |
138 | break; | |
139 | #endif /* IPv6 */ | |
fd385855 | 140 | default: |
4de46d5e | 141 | goto add_free_domain; |
d15c345f | 142 | } |
63c41688 | 143 | |
8f18e675 HD |
144 | if ((entry->family == AF_INET && info->attrs[NLBL_MGMT_A_IPV6ADDR]) || |
145 | (entry->family == AF_INET6 && info->attrs[NLBL_MGMT_A_IPV4ADDR])) | |
146 | goto add_doi_put_def; | |
147 | ||
63c41688 PM |
148 | if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) { |
149 | struct in_addr *addr; | |
150 | struct in_addr *mask; | |
151 | struct netlbl_domaddr4_map *map; | |
152 | ||
153 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
154 | if (addrmap == NULL) { | |
155 | ret_val = -ENOMEM; | |
4de46d5e | 156 | goto add_doi_put_def; |
63c41688 PM |
157 | } |
158 | INIT_LIST_HEAD(&addrmap->list4); | |
159 | INIT_LIST_HEAD(&addrmap->list6); | |
160 | ||
161 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) != | |
162 | sizeof(struct in_addr)) { | |
163 | ret_val = -EINVAL; | |
4de46d5e | 164 | goto add_free_addrmap; |
63c41688 PM |
165 | } |
166 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) != | |
167 | sizeof(struct in_addr)) { | |
168 | ret_val = -EINVAL; | |
4de46d5e | 169 | goto add_free_addrmap; |
63c41688 PM |
170 | } |
171 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]); | |
172 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]); | |
173 | ||
174 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
175 | if (map == NULL) { | |
176 | ret_val = -ENOMEM; | |
4de46d5e | 177 | goto add_free_addrmap; |
63c41688 | 178 | } |
b8f6b052 | 179 | pmap = map; |
63c41688 PM |
180 | map->list.addr = addr->s_addr & mask->s_addr; |
181 | map->list.mask = mask->s_addr; | |
182 | map->list.valid = 1; | |
6a8b7f0c | 183 | map->def.type = entry->def.type; |
63c41688 | 184 | if (cipsov4) |
6a8b7f0c | 185 | map->def.cipso = cipsov4; |
63c41688 PM |
186 | |
187 | ret_val = netlbl_af4list_add(&map->list, &addrmap->list4); | |
b8f6b052 LS |
188 | if (ret_val != 0) |
189 | goto add_free_map; | |
63c41688 | 190 | |
8f18e675 | 191 | entry->family = AF_INET; |
6a8b7f0c PM |
192 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
193 | entry->def.addrsel = addrmap; | |
dfd56b8b | 194 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
195 | } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) { |
196 | struct in6_addr *addr; | |
197 | struct in6_addr *mask; | |
198 | struct netlbl_domaddr6_map *map; | |
199 | ||
200 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
201 | if (addrmap == NULL) { | |
202 | ret_val = -ENOMEM; | |
4de46d5e | 203 | goto add_doi_put_def; |
63c41688 PM |
204 | } |
205 | INIT_LIST_HEAD(&addrmap->list4); | |
206 | INIT_LIST_HEAD(&addrmap->list6); | |
207 | ||
208 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) != | |
209 | sizeof(struct in6_addr)) { | |
210 | ret_val = -EINVAL; | |
4de46d5e | 211 | goto add_free_addrmap; |
63c41688 PM |
212 | } |
213 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) != | |
214 | sizeof(struct in6_addr)) { | |
215 | ret_val = -EINVAL; | |
4de46d5e | 216 | goto add_free_addrmap; |
63c41688 PM |
217 | } |
218 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]); | |
219 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]); | |
220 | ||
221 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
222 | if (map == NULL) { | |
223 | ret_val = -ENOMEM; | |
4de46d5e | 224 | goto add_free_addrmap; |
63c41688 | 225 | } |
b8f6b052 | 226 | pmap = map; |
4e3fd7a0 | 227 | map->list.addr = *addr; |
63c41688 PM |
228 | map->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; |
229 | map->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; | |
230 | map->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; | |
231 | map->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; | |
4e3fd7a0 | 232 | map->list.mask = *mask; |
63c41688 | 233 | map->list.valid = 1; |
6a8b7f0c | 234 | map->def.type = entry->def.type; |
dc7de73f HD |
235 | if (calipso) |
236 | map->def.calipso = calipso; | |
63c41688 PM |
237 | |
238 | ret_val = netlbl_af6list_add(&map->list, &addrmap->list6); | |
b8f6b052 LS |
239 | if (ret_val != 0) |
240 | goto add_free_map; | |
63c41688 | 241 | |
8f18e675 | 242 | entry->family = AF_INET6; |
6a8b7f0c PM |
243 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
244 | entry->def.addrsel = addrmap; | |
63c41688 PM |
245 | #endif /* IPv6 */ |
246 | } | |
247 | ||
248 | ret_val = netlbl_domhsh_add(entry, audit_info); | |
fd385855 | 249 | if (ret_val != 0) |
b8f6b052 | 250 | goto add_free_map; |
d15c345f | 251 | |
d15c345f PM |
252 | return 0; |
253 | ||
b8f6b052 LS |
254 | add_free_map: |
255 | kfree(pmap); | |
4de46d5e | 256 | add_free_addrmap: |
63c41688 | 257 | kfree(addrmap); |
4de46d5e ME |
258 | add_doi_put_def: |
259 | cipso_v4_doi_putdef(cipsov4); | |
dc7de73f HD |
260 | #if IS_ENABLED(CONFIG_IPV6) |
261 | calipso_doi_putdef(calipso); | |
262 | #endif | |
4de46d5e ME |
263 | add_free_domain: |
264 | kfree(entry->domain); | |
265 | add_free_entry: | |
d15c345f | 266 | kfree(entry); |
d15c345f PM |
267 | return ret_val; |
268 | } | |
269 | ||
63c41688 PM |
270 | /** |
271 | * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry | |
272 | * @skb: the NETLINK buffer | |
273 | * @entry: the map entry | |
274 | * | |
275 | * Description: | |
276 | * This function is a helper function used by the LISTALL and LISTDEF command | |
25985edc | 277 | * handlers. The caller is responsible for ensuring that the RCU read lock |
63c41688 PM |
278 | * is held. Returns zero on success, negative values on failure. |
279 | * | |
280 | */ | |
281 | static int netlbl_mgmt_listentry(struct sk_buff *skb, | |
282 | struct netlbl_dom_map *entry) | |
283 | { | |
f8a02479 | 284 | int ret_val = 0; |
63c41688 PM |
285 | struct nlattr *nla_a; |
286 | struct nlattr *nla_b; | |
287 | struct netlbl_af4list *iter4; | |
dfd56b8b | 288 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
289 | struct netlbl_af6list *iter6; |
290 | #endif | |
291 | ||
292 | if (entry->domain != NULL) { | |
293 | ret_val = nla_put_string(skb, | |
294 | NLBL_MGMT_A_DOMAIN, entry->domain); | |
295 | if (ret_val != 0) | |
296 | return ret_val; | |
297 | } | |
298 | ||
8f18e675 HD |
299 | ret_val = nla_put_u16(skb, NLBL_MGMT_A_FAMILY, entry->family); |
300 | if (ret_val != 0) | |
301 | return ret_val; | |
302 | ||
6a8b7f0c | 303 | switch (entry->def.type) { |
63c41688 | 304 | case NETLBL_NLTYPE_ADDRSELECT: |
ae0be8de | 305 | nla_a = nla_nest_start_noflag(skb, NLBL_MGMT_A_SELECTORLIST); |
63c41688 PM |
306 | if (nla_a == NULL) |
307 | return -ENOMEM; | |
308 | ||
6a8b7f0c | 309 | netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) { |
63c41688 PM |
310 | struct netlbl_domaddr4_map *map4; |
311 | struct in_addr addr_struct; | |
312 | ||
ae0be8de MK |
313 | nla_b = nla_nest_start_noflag(skb, |
314 | NLBL_MGMT_A_ADDRSELECTOR); | |
63c41688 PM |
315 | if (nla_b == NULL) |
316 | return -ENOMEM; | |
317 | ||
318 | addr_struct.s_addr = iter4->addr; | |
930345ea JB |
319 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4ADDR, |
320 | addr_struct.s_addr); | |
63c41688 PM |
321 | if (ret_val != 0) |
322 | return ret_val; | |
323 | addr_struct.s_addr = iter4->mask; | |
930345ea JB |
324 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4MASK, |
325 | addr_struct.s_addr); | |
63c41688 PM |
326 | if (ret_val != 0) |
327 | return ret_val; | |
328 | map4 = netlbl_domhsh_addr4_entry(iter4); | |
329 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 330 | map4->def.type); |
63c41688 PM |
331 | if (ret_val != 0) |
332 | return ret_val; | |
6a8b7f0c | 333 | switch (map4->def.type) { |
63c41688 PM |
334 | case NETLBL_NLTYPE_CIPSOV4: |
335 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 336 | map4->def.cipso->doi); |
63c41688 PM |
337 | if (ret_val != 0) |
338 | return ret_val; | |
339 | break; | |
340 | } | |
341 | ||
342 | nla_nest_end(skb, nla_b); | |
343 | } | |
dfd56b8b | 344 | #if IS_ENABLED(CONFIG_IPV6) |
6a8b7f0c | 345 | netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { |
63c41688 PM |
346 | struct netlbl_domaddr6_map *map6; |
347 | ||
ae0be8de MK |
348 | nla_b = nla_nest_start_noflag(skb, |
349 | NLBL_MGMT_A_ADDRSELECTOR); | |
63c41688 PM |
350 | if (nla_b == NULL) |
351 | return -ENOMEM; | |
352 | ||
930345ea JB |
353 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6ADDR, |
354 | &iter6->addr); | |
63c41688 PM |
355 | if (ret_val != 0) |
356 | return ret_val; | |
930345ea JB |
357 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6MASK, |
358 | &iter6->mask); | |
63c41688 PM |
359 | if (ret_val != 0) |
360 | return ret_val; | |
361 | map6 = netlbl_domhsh_addr6_entry(iter6); | |
362 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 363 | map6->def.type); |
63c41688 PM |
364 | if (ret_val != 0) |
365 | return ret_val; | |
366 | ||
dc7de73f HD |
367 | switch (map6->def.type) { |
368 | case NETLBL_NLTYPE_CALIPSO: | |
369 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI, | |
370 | map6->def.calipso->doi); | |
371 | if (ret_val != 0) | |
372 | return ret_val; | |
373 | break; | |
374 | } | |
375 | ||
63c41688 PM |
376 | nla_nest_end(skb, nla_b); |
377 | } | |
378 | #endif /* IPv6 */ | |
379 | ||
380 | nla_nest_end(skb, nla_a); | |
381 | break; | |
382 | case NETLBL_NLTYPE_UNLABELED: | |
dc7de73f HD |
383 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
384 | entry->def.type); | |
63c41688 PM |
385 | break; |
386 | case NETLBL_NLTYPE_CIPSOV4: | |
dc7de73f HD |
387 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
388 | entry->def.type); | |
63c41688 PM |
389 | if (ret_val != 0) |
390 | return ret_val; | |
391 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 392 | entry->def.cipso->doi); |
63c41688 | 393 | break; |
dc7de73f HD |
394 | case NETLBL_NLTYPE_CALIPSO: |
395 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
396 | entry->def.type); | |
397 | if (ret_val != 0) | |
398 | return ret_val; | |
399 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI, | |
400 | entry->def.calipso->doi); | |
401 | break; | |
63c41688 PM |
402 | } |
403 | ||
404 | return ret_val; | |
405 | } | |
406 | ||
407 | /* | |
408 | * NetLabel Command Handlers | |
409 | */ | |
410 | ||
411 | /** | |
412 | * netlbl_mgmt_add - Handle an ADD message | |
413 | * @skb: the NETLINK buffer | |
414 | * @info: the Generic NETLINK info block | |
415 | * | |
416 | * Description: | |
417 | * Process a user generated ADD message and add the domains from the message | |
418 | * to the hash table. See netlabel.h for a description of the message format. | |
419 | * Returns zero on success, negative values on failure. | |
420 | * | |
421 | */ | |
422 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) | |
423 | { | |
424 | struct netlbl_audit audit_info; | |
425 | ||
426 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || | |
427 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || | |
428 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
429 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
430 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
431 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
432 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
433 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
434 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
435 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
436 | return -EINVAL; | |
437 | ||
f7e0318a | 438 | netlbl_netlink_auditinfo(&audit_info); |
63c41688 PM |
439 | |
440 | return netlbl_mgmt_add_common(info, &audit_info); | |
441 | } | |
442 | ||
d15c345f PM |
443 | /** |
444 | * netlbl_mgmt_remove - Handle a REMOVE message | |
445 | * @skb: the NETLINK buffer | |
446 | * @info: the Generic NETLINK info block | |
447 | * | |
448 | * Description: | |
449 | * Process a user generated REMOVE message and remove the specified domain | |
450 | * mappings. Returns zero on success, negative values on failure. | |
451 | * | |
452 | */ | |
453 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) | |
454 | { | |
fd385855 | 455 | char *domain; |
95d4e6be | 456 | struct netlbl_audit audit_info; |
d15c345f | 457 | |
fd385855 PM |
458 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
459 | return -EINVAL; | |
d15c345f | 460 | |
f7e0318a | 461 | netlbl_netlink_auditinfo(&audit_info); |
95d4e6be | 462 | |
fd385855 | 463 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
8f18e675 | 464 | return netlbl_domhsh_remove(domain, AF_UNSPEC, &audit_info); |
fd385855 PM |
465 | } |
466 | ||
467 | /** | |
468 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL | |
469 | * @entry: the domain mapping hash table entry | |
470 | * @arg: the netlbl_domhsh_walk_arg structure | |
471 | * | |
472 | * Description: | |
473 | * This function is designed to be used as a callback to the | |
474 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL | |
475 | * message. Returns the size of the message on success, negative values on | |
476 | * failure. | |
477 | * | |
478 | */ | |
479 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) | |
480 | { | |
481 | int ret_val = -ENOMEM; | |
482 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
483 | void *data; | |
484 | ||
15e47304 | 485 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, |
17c157c8 TG |
486 | cb_arg->seq, &netlbl_mgmt_gnl_family, |
487 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); | |
fd385855 PM |
488 | if (data == NULL) |
489 | goto listall_cb_failure; | |
490 | ||
63c41688 | 491 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
fd385855 PM |
492 | if (ret_val != 0) |
493 | goto listall_cb_failure; | |
d15c345f | 494 | |
fd385855 | 495 | cb_arg->seq++; |
053c095a JB |
496 | genlmsg_end(cb_arg->skb, data); |
497 | return 0; | |
d15c345f | 498 | |
fd385855 PM |
499 | listall_cb_failure: |
500 | genlmsg_cancel(cb_arg->skb, data); | |
d15c345f PM |
501 | return ret_val; |
502 | } | |
503 | ||
504 | /** | |
fd385855 | 505 | * netlbl_mgmt_listall - Handle a LISTALL message |
d15c345f | 506 | * @skb: the NETLINK buffer |
fd385855 | 507 | * @cb: the NETLINK callback |
d15c345f PM |
508 | * |
509 | * Description: | |
fd385855 PM |
510 | * Process a user generated LISTALL message and dumps the domain hash table in |
511 | * a form suitable for use in a kernel generated LISTALL message. Returns zero | |
512 | * on success, negative values on failure. | |
d15c345f PM |
513 | * |
514 | */ | |
fd385855 PM |
515 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
516 | struct netlink_callback *cb) | |
d15c345f | 517 | { |
fd385855 PM |
518 | struct netlbl_domhsh_walk_arg cb_arg; |
519 | u32 skip_bkt = cb->args[0]; | |
520 | u32 skip_chain = cb->args[1]; | |
521 | ||
522 | cb_arg.nl_cb = cb; | |
523 | cb_arg.skb = skb; | |
524 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
525 | ||
526 | netlbl_domhsh_walk(&skip_bkt, | |
527 | &skip_chain, | |
528 | netlbl_mgmt_listall_cb, | |
529 | &cb_arg); | |
530 | ||
531 | cb->args[0] = skip_bkt; | |
532 | cb->args[1] = skip_chain; | |
533 | return skb->len; | |
d15c345f PM |
534 | } |
535 | ||
536 | /** | |
537 | * netlbl_mgmt_adddef - Handle an ADDDEF message | |
538 | * @skb: the NETLINK buffer | |
539 | * @info: the Generic NETLINK info block | |
540 | * | |
541 | * Description: | |
542 | * Process a user generated ADDDEF message and respond accordingly. Returns | |
543 | * zero on success, negative values on failure. | |
544 | * | |
545 | */ | |
546 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) | |
547 | { | |
95d4e6be | 548 | struct netlbl_audit audit_info; |
d15c345f | 549 | |
63c41688 PM |
550 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
551 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
552 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
553 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
554 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
555 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
556 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
557 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
558 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
559 | return -EINVAL; | |
d15c345f | 560 | |
f7e0318a | 561 | netlbl_netlink_auditinfo(&audit_info); |
95d4e6be | 562 | |
63c41688 | 563 | return netlbl_mgmt_add_common(info, &audit_info); |
d15c345f PM |
564 | } |
565 | ||
566 | /** | |
567 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message | |
568 | * @skb: the NETLINK buffer | |
569 | * @info: the Generic NETLINK info block | |
570 | * | |
571 | * Description: | |
572 | * Process a user generated REMOVEDEF message and remove the default domain | |
573 | * mapping. Returns zero on success, negative values on failure. | |
574 | * | |
575 | */ | |
576 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) | |
577 | { | |
95d4e6be PM |
578 | struct netlbl_audit audit_info; |
579 | ||
f7e0318a | 580 | netlbl_netlink_auditinfo(&audit_info); |
95d4e6be | 581 | |
8f18e675 | 582 | return netlbl_domhsh_remove_default(AF_UNSPEC, &audit_info); |
d15c345f PM |
583 | } |
584 | ||
585 | /** | |
586 | * netlbl_mgmt_listdef - Handle a LISTDEF message | |
587 | * @skb: the NETLINK buffer | |
588 | * @info: the Generic NETLINK info block | |
589 | * | |
590 | * Description: | |
591 | * Process a user generated LISTDEF message and dumps the default domain | |
592 | * mapping in a form suitable for use in a kernel generated LISTDEF message. | |
593 | * Returns zero on success, negative values on failure. | |
594 | * | |
595 | */ | |
596 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) | |
597 | { | |
598 | int ret_val = -ENOMEM; | |
fd385855 PM |
599 | struct sk_buff *ans_skb = NULL; |
600 | void *data; | |
601 | struct netlbl_dom_map *entry; | |
8f18e675 HD |
602 | u16 family; |
603 | ||
604 | if (info->attrs[NLBL_MGMT_A_FAMILY]) | |
605 | family = nla_get_u16(info->attrs[NLBL_MGMT_A_FAMILY]); | |
606 | else | |
607 | family = AF_INET; | |
d15c345f | 608 | |
339bf98f | 609 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 610 | if (ans_skb == NULL) |
fd385855 | 611 | return -ENOMEM; |
17c157c8 TG |
612 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
613 | 0, NLBL_MGMT_C_LISTDEF); | |
fd385855 | 614 | if (data == NULL) |
d15c345f | 615 | goto listdef_failure; |
d15c345f | 616 | |
fd385855 | 617 | rcu_read_lock(); |
8f18e675 | 618 | entry = netlbl_domhsh_getentry(NULL, family); |
fd385855 PM |
619 | if (entry == NULL) { |
620 | ret_val = -ENOENT; | |
621 | goto listdef_failure_lock; | |
622 | } | |
63c41688 | 623 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
fd385855 | 624 | rcu_read_unlock(); |
63c41688 PM |
625 | if (ret_val != 0) |
626 | goto listdef_failure; | |
d15c345f | 627 | |
fd385855 | 628 | genlmsg_end(ans_skb, data); |
fe785bee | 629 | return genlmsg_reply(ans_skb, info); |
d15c345f | 630 | |
fd385855 PM |
631 | listdef_failure_lock: |
632 | rcu_read_unlock(); | |
d15c345f | 633 | listdef_failure: |
fd385855 | 634 | kfree_skb(ans_skb); |
d15c345f PM |
635 | return ret_val; |
636 | } | |
637 | ||
638 | /** | |
fd385855 PM |
639 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
640 | * @skb: the skb to write to | |
fd385855 PM |
641 | * @cb: the NETLINK callback |
642 | * @protocol: the NetLabel protocol to use in the message | |
d15c345f PM |
643 | * |
644 | * Description: | |
fd385855 PM |
645 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
646 | * answer a application's PROTOCOLS message. Returns the size of the message | |
647 | * on success, negative values on failure. | |
d15c345f PM |
648 | * |
649 | */ | |
fd385855 PM |
650 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
651 | struct netlink_callback *cb, | |
652 | u32 protocol) | |
d15c345f PM |
653 | { |
654 | int ret_val = -ENOMEM; | |
fd385855 PM |
655 | void *data; |
656 | ||
15e47304 | 657 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
17c157c8 TG |
658 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, |
659 | NLBL_MGMT_C_PROTOCOLS); | |
fd385855 PM |
660 | if (data == NULL) |
661 | goto protocols_cb_failure; | |
662 | ||
663 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); | |
d15c345f | 664 | if (ret_val != 0) |
fd385855 | 665 | goto protocols_cb_failure; |
d15c345f | 666 | |
053c095a JB |
667 | genlmsg_end(skb, data); |
668 | return 0; | |
d15c345f | 669 | |
fd385855 PM |
670 | protocols_cb_failure: |
671 | genlmsg_cancel(skb, data); | |
d15c345f PM |
672 | return ret_val; |
673 | } | |
674 | ||
fd385855 PM |
675 | /** |
676 | * netlbl_mgmt_protocols - Handle a PROTOCOLS message | |
677 | * @skb: the NETLINK buffer | |
678 | * @cb: the NETLINK callback | |
679 | * | |
680 | * Description: | |
681 | * Process a user generated PROTOCOLS message and respond accordingly. | |
682 | * | |
683 | */ | |
684 | static int netlbl_mgmt_protocols(struct sk_buff *skb, | |
685 | struct netlink_callback *cb) | |
686 | { | |
687 | u32 protos_sent = cb->args[0]; | |
688 | ||
689 | if (protos_sent == 0) { | |
690 | if (netlbl_mgmt_protocols_cb(skb, | |
691 | cb, | |
692 | NETLBL_NLTYPE_UNLABELED) < 0) | |
693 | goto protocols_return; | |
694 | protos_sent++; | |
695 | } | |
696 | if (protos_sent == 1) { | |
697 | if (netlbl_mgmt_protocols_cb(skb, | |
698 | cb, | |
699 | NETLBL_NLTYPE_CIPSOV4) < 0) | |
700 | goto protocols_return; | |
701 | protos_sent++; | |
702 | } | |
cb72d382 HD |
703 | #if IS_ENABLED(CONFIG_IPV6) |
704 | if (protos_sent == 2) { | |
705 | if (netlbl_mgmt_protocols_cb(skb, | |
706 | cb, | |
707 | NETLBL_NLTYPE_CALIPSO) < 0) | |
708 | goto protocols_return; | |
709 | protos_sent++; | |
710 | } | |
711 | #endif | |
fd385855 PM |
712 | |
713 | protocols_return: | |
714 | cb->args[0] = protos_sent; | |
715 | return skb->len; | |
716 | } | |
717 | ||
d15c345f PM |
718 | /** |
719 | * netlbl_mgmt_version - Handle a VERSION message | |
720 | * @skb: the NETLINK buffer | |
721 | * @info: the Generic NETLINK info block | |
722 | * | |
723 | * Description: | |
724 | * Process a user generated VERSION message and respond accordingly. Returns | |
725 | * zero on success, negative values on failure. | |
726 | * | |
727 | */ | |
728 | static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info) | |
729 | { | |
730 | int ret_val = -ENOMEM; | |
731 | struct sk_buff *ans_skb = NULL; | |
fd385855 | 732 | void *data; |
d15c345f | 733 | |
339bf98f | 734 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 735 | if (ans_skb == NULL) |
fd385855 | 736 | return -ENOMEM; |
17c157c8 TG |
737 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
738 | 0, NLBL_MGMT_C_VERSION); | |
fd385855 | 739 | if (data == NULL) |
d15c345f PM |
740 | goto version_failure; |
741 | ||
fd385855 PM |
742 | ret_val = nla_put_u32(ans_skb, |
743 | NLBL_MGMT_A_VERSION, | |
744 | NETLBL_PROTO_VERSION); | |
d15c345f PM |
745 | if (ret_val != 0) |
746 | goto version_failure; | |
747 | ||
fd385855 | 748 | genlmsg_end(ans_skb, data); |
fe785bee | 749 | return genlmsg_reply(ans_skb, info); |
d15c345f PM |
750 | |
751 | version_failure: | |
752 | kfree_skb(ans_skb); | |
d15c345f PM |
753 | return ret_val; |
754 | } | |
755 | ||
756 | ||
757 | /* | |
758 | * NetLabel Generic NETLINK Command Definitions | |
759 | */ | |
760 | ||
66a9b928 | 761 | static const struct genl_small_ops netlbl_mgmt_genl_ops[] = { |
227c43c3 | 762 | { |
d15c345f | 763 | .cmd = NLBL_MGMT_C_ADD, |
ef6243ac | 764 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 765 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
766 | .doit = netlbl_mgmt_add, |
767 | .dumpit = NULL, | |
227c43c3 PE |
768 | }, |
769 | { | |
d15c345f | 770 | .cmd = NLBL_MGMT_C_REMOVE, |
ef6243ac | 771 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 772 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
773 | .doit = netlbl_mgmt_remove, |
774 | .dumpit = NULL, | |
227c43c3 PE |
775 | }, |
776 | { | |
fd385855 | 777 | .cmd = NLBL_MGMT_C_LISTALL, |
ef6243ac | 778 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f | 779 | .flags = 0, |
fd385855 PM |
780 | .doit = NULL, |
781 | .dumpit = netlbl_mgmt_listall, | |
227c43c3 PE |
782 | }, |
783 | { | |
d15c345f | 784 | .cmd = NLBL_MGMT_C_ADDDEF, |
ef6243ac | 785 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 786 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
787 | .doit = netlbl_mgmt_adddef, |
788 | .dumpit = NULL, | |
227c43c3 PE |
789 | }, |
790 | { | |
d15c345f | 791 | .cmd = NLBL_MGMT_C_REMOVEDEF, |
ef6243ac | 792 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 793 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
794 | .doit = netlbl_mgmt_removedef, |
795 | .dumpit = NULL, | |
227c43c3 PE |
796 | }, |
797 | { | |
d15c345f | 798 | .cmd = NLBL_MGMT_C_LISTDEF, |
ef6243ac | 799 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f PM |
800 | .flags = 0, |
801 | .doit = netlbl_mgmt_listdef, | |
802 | .dumpit = NULL, | |
227c43c3 PE |
803 | }, |
804 | { | |
fd385855 | 805 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
ef6243ac | 806 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f | 807 | .flags = 0, |
fd385855 PM |
808 | .doit = NULL, |
809 | .dumpit = netlbl_mgmt_protocols, | |
227c43c3 PE |
810 | }, |
811 | { | |
d15c345f | 812 | .cmd = NLBL_MGMT_C_VERSION, |
ef6243ac | 813 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f PM |
814 | .flags = 0, |
815 | .doit = netlbl_mgmt_version, | |
816 | .dumpit = NULL, | |
227c43c3 | 817 | }, |
d15c345f PM |
818 | }; |
819 | ||
56989f6d | 820 | static struct genl_family netlbl_mgmt_gnl_family __ro_after_init = { |
489111e5 JB |
821 | .hdrsize = 0, |
822 | .name = NETLBL_NLTYPE_MGMT_NAME, | |
823 | .version = NETLBL_PROTO_VERSION, | |
824 | .maxattr = NLBL_MGMT_A_MAX, | |
3b0f31f2 | 825 | .policy = netlbl_mgmt_genl_policy, |
489111e5 | 826 | .module = THIS_MODULE, |
66a9b928 JK |
827 | .small_ops = netlbl_mgmt_genl_ops, |
828 | .n_small_ops = ARRAY_SIZE(netlbl_mgmt_genl_ops), | |
489111e5 JB |
829 | }; |
830 | ||
d15c345f PM |
831 | /* |
832 | * NetLabel Generic NETLINK Protocol Functions | |
833 | */ | |
834 | ||
835 | /** | |
836 | * netlbl_mgmt_genl_init - Register the NetLabel management component | |
837 | * | |
838 | * Description: | |
839 | * Register the NetLabel management component with the Generic NETLINK | |
840 | * mechanism. Returns zero on success, negative values on failure. | |
841 | * | |
842 | */ | |
05705e4e | 843 | int __init netlbl_mgmt_genl_init(void) |
d15c345f | 844 | { |
489111e5 | 845 | return genl_register_family(&netlbl_mgmt_gnl_family); |
d15c345f | 846 | } |