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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 | /** | |
66 | * netlbl_mgmt_add - 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 PM |
78 | { |
79 | int ret_val = -EINVAL; | |
63c41688 PM |
80 | struct netlbl_domaddr_map *addrmap = NULL; |
81 | struct cipso_v4_doi *cipsov4 = NULL; | |
dc7de73f HD |
82 | #if IS_ENABLED(CONFIG_IPV6) |
83 | struct calipso_doi *calipso = NULL; | |
84 | #endif | |
d15c345f | 85 | u32 tmp_val; |
4de46d5e | 86 | struct netlbl_dom_map *entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
95d4e6be | 87 | |
4de46d5e ME |
88 | if (!entry) |
89 | return -ENOMEM; | |
6a8b7f0c | 90 | entry->def.type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); |
63c41688 PM |
91 | if (info->attrs[NLBL_MGMT_A_DOMAIN]) { |
92 | size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]); | |
93 | entry->domain = kmalloc(tmp_size, GFP_KERNEL); | |
94 | if (entry->domain == NULL) { | |
95 | ret_val = -ENOMEM; | |
4de46d5e | 96 | goto add_free_entry; |
63c41688 PM |
97 | } |
98 | nla_strlcpy(entry->domain, | |
99 | info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size); | |
100 | } | |
101 | ||
6a8b7f0c | 102 | /* NOTE: internally we allow/use a entry->def.type value of |
63c41688 PM |
103 | * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users |
104 | * to pass that as a protocol value because we need to know the | |
105 | * "real" protocol */ | |
d15c345f | 106 | |
6a8b7f0c | 107 | switch (entry->def.type) { |
fd385855 | 108 | case NETLBL_NLTYPE_UNLABELED: |
8f18e675 HD |
109 | if (info->attrs[NLBL_MGMT_A_FAMILY]) |
110 | entry->family = | |
111 | nla_get_u16(info->attrs[NLBL_MGMT_A_FAMILY]); | |
112 | else | |
113 | entry->family = AF_UNSPEC; | |
fd385855 PM |
114 | break; |
115 | case NETLBL_NLTYPE_CIPSOV4: | |
116 | if (!info->attrs[NLBL_MGMT_A_CV4DOI]) | |
4de46d5e | 117 | goto add_free_domain; |
d15c345f | 118 | |
fd385855 | 119 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]); |
63c41688 PM |
120 | cipsov4 = cipso_v4_doi_getdef(tmp_val); |
121 | if (cipsov4 == NULL) | |
4de46d5e | 122 | goto add_free_domain; |
8f18e675 | 123 | entry->family = AF_INET; |
6a8b7f0c | 124 | entry->def.cipso = cipsov4; |
fd385855 | 125 | break; |
dc7de73f HD |
126 | #if IS_ENABLED(CONFIG_IPV6) |
127 | case NETLBL_NLTYPE_CALIPSO: | |
128 | if (!info->attrs[NLBL_MGMT_A_CLPDOI]) | |
129 | goto add_free_domain; | |
130 | ||
131 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CLPDOI]); | |
132 | calipso = calipso_doi_getdef(tmp_val); | |
133 | if (calipso == NULL) | |
134 | goto add_free_domain; | |
135 | entry->family = AF_INET6; | |
136 | entry->def.calipso = calipso; | |
137 | break; | |
138 | #endif /* IPv6 */ | |
fd385855 | 139 | default: |
4de46d5e | 140 | goto add_free_domain; |
d15c345f | 141 | } |
63c41688 | 142 | |
8f18e675 HD |
143 | if ((entry->family == AF_INET && info->attrs[NLBL_MGMT_A_IPV6ADDR]) || |
144 | (entry->family == AF_INET6 && info->attrs[NLBL_MGMT_A_IPV4ADDR])) | |
145 | goto add_doi_put_def; | |
146 | ||
63c41688 PM |
147 | if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) { |
148 | struct in_addr *addr; | |
149 | struct in_addr *mask; | |
150 | struct netlbl_domaddr4_map *map; | |
151 | ||
152 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); | |
153 | if (addrmap == NULL) { | |
154 | ret_val = -ENOMEM; | |
4de46d5e | 155 | goto add_doi_put_def; |
63c41688 PM |
156 | } |
157 | INIT_LIST_HEAD(&addrmap->list4); | |
158 | INIT_LIST_HEAD(&addrmap->list6); | |
159 | ||
160 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) != | |
161 | sizeof(struct in_addr)) { | |
162 | ret_val = -EINVAL; | |
4de46d5e | 163 | goto add_free_addrmap; |
63c41688 PM |
164 | } |
165 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) != | |
166 | sizeof(struct in_addr)) { | |
167 | ret_val = -EINVAL; | |
4de46d5e | 168 | goto add_free_addrmap; |
63c41688 PM |
169 | } |
170 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]); | |
171 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]); | |
172 | ||
173 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
174 | if (map == NULL) { | |
175 | ret_val = -ENOMEM; | |
4de46d5e | 176 | goto add_free_addrmap; |
63c41688 PM |
177 | } |
178 | map->list.addr = addr->s_addr & mask->s_addr; | |
179 | map->list.mask = mask->s_addr; | |
180 | map->list.valid = 1; | |
6a8b7f0c | 181 | map->def.type = entry->def.type; |
63c41688 | 182 | if (cipsov4) |
6a8b7f0c | 183 | map->def.cipso = cipsov4; |
63c41688 PM |
184 | |
185 | ret_val = netlbl_af4list_add(&map->list, &addrmap->list4); | |
186 | if (ret_val != 0) { | |
187 | kfree(map); | |
4de46d5e | 188 | goto add_free_addrmap; |
63c41688 PM |
189 | } |
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 | } |
4e3fd7a0 | 226 | map->list.addr = *addr; |
63c41688 PM |
227 | map->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; |
228 | map->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; | |
229 | map->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; | |
230 | map->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; | |
4e3fd7a0 | 231 | map->list.mask = *mask; |
63c41688 | 232 | map->list.valid = 1; |
6a8b7f0c | 233 | map->def.type = entry->def.type; |
dc7de73f HD |
234 | if (calipso) |
235 | map->def.calipso = calipso; | |
63c41688 PM |
236 | |
237 | ret_val = netlbl_af6list_add(&map->list, &addrmap->list6); | |
238 | if (ret_val != 0) { | |
239 | kfree(map); | |
4de46d5e | 240 | goto add_free_addrmap; |
63c41688 PM |
241 | } |
242 | ||
8f18e675 | 243 | entry->family = AF_INET6; |
6a8b7f0c PM |
244 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
245 | entry->def.addrsel = addrmap; | |
63c41688 PM |
246 | #endif /* IPv6 */ |
247 | } | |
248 | ||
249 | ret_val = netlbl_domhsh_add(entry, audit_info); | |
fd385855 | 250 | if (ret_val != 0) |
4de46d5e | 251 | goto add_free_addrmap; |
d15c345f | 252 | |
d15c345f PM |
253 | return 0; |
254 | ||
4de46d5e | 255 | add_free_addrmap: |
63c41688 | 256 | kfree(addrmap); |
4de46d5e ME |
257 | add_doi_put_def: |
258 | cipso_v4_doi_putdef(cipsov4); | |
dc7de73f HD |
259 | #if IS_ENABLED(CONFIG_IPV6) |
260 | calipso_doi_putdef(calipso); | |
261 | #endif | |
4de46d5e ME |
262 | add_free_domain: |
263 | kfree(entry->domain); | |
264 | add_free_entry: | |
d15c345f | 265 | kfree(entry); |
d15c345f PM |
266 | return ret_val; |
267 | } | |
268 | ||
63c41688 PM |
269 | /** |
270 | * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry | |
271 | * @skb: the NETLINK buffer | |
272 | * @entry: the map entry | |
273 | * | |
274 | * Description: | |
275 | * This function is a helper function used by the LISTALL and LISTDEF command | |
25985edc | 276 | * handlers. The caller is responsible for ensuring that the RCU read lock |
63c41688 PM |
277 | * is held. Returns zero on success, negative values on failure. |
278 | * | |
279 | */ | |
280 | static int netlbl_mgmt_listentry(struct sk_buff *skb, | |
281 | struct netlbl_dom_map *entry) | |
282 | { | |
f8a02479 | 283 | int ret_val = 0; |
63c41688 PM |
284 | struct nlattr *nla_a; |
285 | struct nlattr *nla_b; | |
286 | struct netlbl_af4list *iter4; | |
dfd56b8b | 287 | #if IS_ENABLED(CONFIG_IPV6) |
63c41688 PM |
288 | struct netlbl_af6list *iter6; |
289 | #endif | |
290 | ||
291 | if (entry->domain != NULL) { | |
292 | ret_val = nla_put_string(skb, | |
293 | NLBL_MGMT_A_DOMAIN, entry->domain); | |
294 | if (ret_val != 0) | |
295 | return ret_val; | |
296 | } | |
297 | ||
8f18e675 HD |
298 | ret_val = nla_put_u16(skb, NLBL_MGMT_A_FAMILY, entry->family); |
299 | if (ret_val != 0) | |
300 | return ret_val; | |
301 | ||
6a8b7f0c | 302 | switch (entry->def.type) { |
63c41688 | 303 | case NETLBL_NLTYPE_ADDRSELECT: |
ae0be8de | 304 | nla_a = nla_nest_start_noflag(skb, NLBL_MGMT_A_SELECTORLIST); |
63c41688 PM |
305 | if (nla_a == NULL) |
306 | return -ENOMEM; | |
307 | ||
6a8b7f0c | 308 | netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) { |
63c41688 PM |
309 | struct netlbl_domaddr4_map *map4; |
310 | struct in_addr addr_struct; | |
311 | ||
ae0be8de MK |
312 | nla_b = nla_nest_start_noflag(skb, |
313 | NLBL_MGMT_A_ADDRSELECTOR); | |
63c41688 PM |
314 | if (nla_b == NULL) |
315 | return -ENOMEM; | |
316 | ||
317 | addr_struct.s_addr = iter4->addr; | |
930345ea JB |
318 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4ADDR, |
319 | addr_struct.s_addr); | |
63c41688 PM |
320 | if (ret_val != 0) |
321 | return ret_val; | |
322 | addr_struct.s_addr = iter4->mask; | |
930345ea JB |
323 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4MASK, |
324 | addr_struct.s_addr); | |
63c41688 PM |
325 | if (ret_val != 0) |
326 | return ret_val; | |
327 | map4 = netlbl_domhsh_addr4_entry(iter4); | |
328 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 329 | map4->def.type); |
63c41688 PM |
330 | if (ret_val != 0) |
331 | return ret_val; | |
6a8b7f0c | 332 | switch (map4->def.type) { |
63c41688 PM |
333 | case NETLBL_NLTYPE_CIPSOV4: |
334 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 335 | map4->def.cipso->doi); |
63c41688 PM |
336 | if (ret_val != 0) |
337 | return ret_val; | |
338 | break; | |
339 | } | |
340 | ||
341 | nla_nest_end(skb, nla_b); | |
342 | } | |
dfd56b8b | 343 | #if IS_ENABLED(CONFIG_IPV6) |
6a8b7f0c | 344 | netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { |
63c41688 PM |
345 | struct netlbl_domaddr6_map *map6; |
346 | ||
ae0be8de MK |
347 | nla_b = nla_nest_start_noflag(skb, |
348 | NLBL_MGMT_A_ADDRSELECTOR); | |
63c41688 PM |
349 | if (nla_b == NULL) |
350 | return -ENOMEM; | |
351 | ||
930345ea JB |
352 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6ADDR, |
353 | &iter6->addr); | |
63c41688 PM |
354 | if (ret_val != 0) |
355 | return ret_val; | |
930345ea JB |
356 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6MASK, |
357 | &iter6->mask); | |
63c41688 PM |
358 | if (ret_val != 0) |
359 | return ret_val; | |
360 | map6 = netlbl_domhsh_addr6_entry(iter6); | |
361 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
6a8b7f0c | 362 | map6->def.type); |
63c41688 PM |
363 | if (ret_val != 0) |
364 | return ret_val; | |
365 | ||
dc7de73f HD |
366 | switch (map6->def.type) { |
367 | case NETLBL_NLTYPE_CALIPSO: | |
368 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI, | |
369 | map6->def.calipso->doi); | |
370 | if (ret_val != 0) | |
371 | return ret_val; | |
372 | break; | |
373 | } | |
374 | ||
63c41688 PM |
375 | nla_nest_end(skb, nla_b); |
376 | } | |
377 | #endif /* IPv6 */ | |
378 | ||
379 | nla_nest_end(skb, nla_a); | |
380 | break; | |
381 | case NETLBL_NLTYPE_UNLABELED: | |
dc7de73f HD |
382 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
383 | entry->def.type); | |
63c41688 PM |
384 | break; |
385 | case NETLBL_NLTYPE_CIPSOV4: | |
dc7de73f HD |
386 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
387 | entry->def.type); | |
63c41688 PM |
388 | if (ret_val != 0) |
389 | return ret_val; | |
390 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, | |
6a8b7f0c | 391 | entry->def.cipso->doi); |
63c41688 | 392 | break; |
dc7de73f HD |
393 | case NETLBL_NLTYPE_CALIPSO: |
394 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, | |
395 | entry->def.type); | |
396 | if (ret_val != 0) | |
397 | return ret_val; | |
398 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI, | |
399 | entry->def.calipso->doi); | |
400 | break; | |
63c41688 PM |
401 | } |
402 | ||
403 | return ret_val; | |
404 | } | |
405 | ||
406 | /* | |
407 | * NetLabel Command Handlers | |
408 | */ | |
409 | ||
410 | /** | |
411 | * netlbl_mgmt_add - Handle an ADD message | |
412 | * @skb: the NETLINK buffer | |
413 | * @info: the Generic NETLINK info block | |
414 | * | |
415 | * Description: | |
416 | * Process a user generated ADD message and add the domains from the message | |
417 | * to the hash table. See netlabel.h for a description of the message format. | |
418 | * Returns zero on success, negative values on failure. | |
419 | * | |
420 | */ | |
421 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) | |
422 | { | |
423 | struct netlbl_audit audit_info; | |
424 | ||
425 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || | |
426 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || | |
427 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
428 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
429 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
430 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
431 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
432 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
433 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
434 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
435 | return -EINVAL; | |
436 | ||
437 | netlbl_netlink_auditinfo(skb, &audit_info); | |
438 | ||
439 | return netlbl_mgmt_add_common(info, &audit_info); | |
440 | } | |
441 | ||
d15c345f PM |
442 | /** |
443 | * netlbl_mgmt_remove - Handle a REMOVE message | |
444 | * @skb: the NETLINK buffer | |
445 | * @info: the Generic NETLINK info block | |
446 | * | |
447 | * Description: | |
448 | * Process a user generated REMOVE message and remove the specified domain | |
449 | * mappings. Returns zero on success, negative values on failure. | |
450 | * | |
451 | */ | |
452 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) | |
453 | { | |
fd385855 | 454 | char *domain; |
95d4e6be | 455 | struct netlbl_audit audit_info; |
d15c345f | 456 | |
fd385855 PM |
457 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
458 | return -EINVAL; | |
d15c345f | 459 | |
95d4e6be PM |
460 | netlbl_netlink_auditinfo(skb, &audit_info); |
461 | ||
fd385855 | 462 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
8f18e675 | 463 | return netlbl_domhsh_remove(domain, AF_UNSPEC, &audit_info); |
fd385855 PM |
464 | } |
465 | ||
466 | /** | |
467 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL | |
468 | * @entry: the domain mapping hash table entry | |
469 | * @arg: the netlbl_domhsh_walk_arg structure | |
470 | * | |
471 | * Description: | |
472 | * This function is designed to be used as a callback to the | |
473 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL | |
474 | * message. Returns the size of the message on success, negative values on | |
475 | * failure. | |
476 | * | |
477 | */ | |
478 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) | |
479 | { | |
480 | int ret_val = -ENOMEM; | |
481 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
482 | void *data; | |
483 | ||
15e47304 | 484 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, |
17c157c8 TG |
485 | cb_arg->seq, &netlbl_mgmt_gnl_family, |
486 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); | |
fd385855 PM |
487 | if (data == NULL) |
488 | goto listall_cb_failure; | |
489 | ||
63c41688 | 490 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
fd385855 PM |
491 | if (ret_val != 0) |
492 | goto listall_cb_failure; | |
d15c345f | 493 | |
fd385855 | 494 | cb_arg->seq++; |
053c095a JB |
495 | genlmsg_end(cb_arg->skb, data); |
496 | return 0; | |
d15c345f | 497 | |
fd385855 PM |
498 | listall_cb_failure: |
499 | genlmsg_cancel(cb_arg->skb, data); | |
d15c345f PM |
500 | return ret_val; |
501 | } | |
502 | ||
503 | /** | |
fd385855 | 504 | * netlbl_mgmt_listall - Handle a LISTALL message |
d15c345f | 505 | * @skb: the NETLINK buffer |
fd385855 | 506 | * @cb: the NETLINK callback |
d15c345f PM |
507 | * |
508 | * Description: | |
fd385855 PM |
509 | * Process a user generated LISTALL message and dumps the domain hash table in |
510 | * a form suitable for use in a kernel generated LISTALL message. Returns zero | |
511 | * on success, negative values on failure. | |
d15c345f PM |
512 | * |
513 | */ | |
fd385855 PM |
514 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
515 | struct netlink_callback *cb) | |
d15c345f | 516 | { |
fd385855 PM |
517 | struct netlbl_domhsh_walk_arg cb_arg; |
518 | u32 skip_bkt = cb->args[0]; | |
519 | u32 skip_chain = cb->args[1]; | |
520 | ||
521 | cb_arg.nl_cb = cb; | |
522 | cb_arg.skb = skb; | |
523 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
524 | ||
525 | netlbl_domhsh_walk(&skip_bkt, | |
526 | &skip_chain, | |
527 | netlbl_mgmt_listall_cb, | |
528 | &cb_arg); | |
529 | ||
530 | cb->args[0] = skip_bkt; | |
531 | cb->args[1] = skip_chain; | |
532 | return skb->len; | |
d15c345f PM |
533 | } |
534 | ||
535 | /** | |
536 | * netlbl_mgmt_adddef - Handle an ADDDEF message | |
537 | * @skb: the NETLINK buffer | |
538 | * @info: the Generic NETLINK info block | |
539 | * | |
540 | * Description: | |
541 | * Process a user generated ADDDEF message and respond accordingly. Returns | |
542 | * zero on success, negative values on failure. | |
543 | * | |
544 | */ | |
545 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) | |
546 | { | |
95d4e6be | 547 | struct netlbl_audit audit_info; |
d15c345f | 548 | |
63c41688 PM |
549 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
550 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && | |
551 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || | |
552 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && | |
553 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || | |
554 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ | |
555 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || | |
556 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ | |
557 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) | |
558 | return -EINVAL; | |
d15c345f | 559 | |
95d4e6be PM |
560 | netlbl_netlink_auditinfo(skb, &audit_info); |
561 | ||
63c41688 | 562 | return netlbl_mgmt_add_common(info, &audit_info); |
d15c345f PM |
563 | } |
564 | ||
565 | /** | |
566 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message | |
567 | * @skb: the NETLINK buffer | |
568 | * @info: the Generic NETLINK info block | |
569 | * | |
570 | * Description: | |
571 | * Process a user generated REMOVEDEF message and remove the default domain | |
572 | * mapping. Returns zero on success, negative values on failure. | |
573 | * | |
574 | */ | |
575 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) | |
576 | { | |
95d4e6be PM |
577 | struct netlbl_audit audit_info; |
578 | ||
579 | netlbl_netlink_auditinfo(skb, &audit_info); | |
580 | ||
8f18e675 | 581 | return netlbl_domhsh_remove_default(AF_UNSPEC, &audit_info); |
d15c345f PM |
582 | } |
583 | ||
584 | /** | |
585 | * netlbl_mgmt_listdef - Handle a LISTDEF message | |
586 | * @skb: the NETLINK buffer | |
587 | * @info: the Generic NETLINK info block | |
588 | * | |
589 | * Description: | |
590 | * Process a user generated LISTDEF message and dumps the default domain | |
591 | * mapping in a form suitable for use in a kernel generated LISTDEF message. | |
592 | * Returns zero on success, negative values on failure. | |
593 | * | |
594 | */ | |
595 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) | |
596 | { | |
597 | int ret_val = -ENOMEM; | |
fd385855 PM |
598 | struct sk_buff *ans_skb = NULL; |
599 | void *data; | |
600 | struct netlbl_dom_map *entry; | |
8f18e675 HD |
601 | u16 family; |
602 | ||
603 | if (info->attrs[NLBL_MGMT_A_FAMILY]) | |
604 | family = nla_get_u16(info->attrs[NLBL_MGMT_A_FAMILY]); | |
605 | else | |
606 | family = AF_INET; | |
d15c345f | 607 | |
339bf98f | 608 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 609 | if (ans_skb == NULL) |
fd385855 | 610 | return -ENOMEM; |
17c157c8 TG |
611 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
612 | 0, NLBL_MGMT_C_LISTDEF); | |
fd385855 | 613 | if (data == NULL) |
d15c345f | 614 | goto listdef_failure; |
d15c345f | 615 | |
fd385855 | 616 | rcu_read_lock(); |
8f18e675 | 617 | entry = netlbl_domhsh_getentry(NULL, family); |
fd385855 PM |
618 | if (entry == NULL) { |
619 | ret_val = -ENOENT; | |
620 | goto listdef_failure_lock; | |
621 | } | |
63c41688 | 622 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
fd385855 | 623 | rcu_read_unlock(); |
63c41688 PM |
624 | if (ret_val != 0) |
625 | goto listdef_failure; | |
d15c345f | 626 | |
fd385855 | 627 | genlmsg_end(ans_skb, data); |
fe785bee | 628 | return genlmsg_reply(ans_skb, info); |
d15c345f | 629 | |
fd385855 PM |
630 | listdef_failure_lock: |
631 | rcu_read_unlock(); | |
d15c345f | 632 | listdef_failure: |
fd385855 | 633 | kfree_skb(ans_skb); |
d15c345f PM |
634 | return ret_val; |
635 | } | |
636 | ||
637 | /** | |
fd385855 PM |
638 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
639 | * @skb: the skb to write to | |
fd385855 PM |
640 | * @cb: the NETLINK callback |
641 | * @protocol: the NetLabel protocol to use in the message | |
d15c345f PM |
642 | * |
643 | * Description: | |
fd385855 PM |
644 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
645 | * answer a application's PROTOCOLS message. Returns the size of the message | |
646 | * on success, negative values on failure. | |
d15c345f PM |
647 | * |
648 | */ | |
fd385855 PM |
649 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
650 | struct netlink_callback *cb, | |
651 | u32 protocol) | |
d15c345f PM |
652 | { |
653 | int ret_val = -ENOMEM; | |
fd385855 PM |
654 | void *data; |
655 | ||
15e47304 | 656 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
17c157c8 TG |
657 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, |
658 | NLBL_MGMT_C_PROTOCOLS); | |
fd385855 PM |
659 | if (data == NULL) |
660 | goto protocols_cb_failure; | |
661 | ||
662 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); | |
d15c345f | 663 | if (ret_val != 0) |
fd385855 | 664 | goto protocols_cb_failure; |
d15c345f | 665 | |
053c095a JB |
666 | genlmsg_end(skb, data); |
667 | return 0; | |
d15c345f | 668 | |
fd385855 PM |
669 | protocols_cb_failure: |
670 | genlmsg_cancel(skb, data); | |
d15c345f PM |
671 | return ret_val; |
672 | } | |
673 | ||
fd385855 PM |
674 | /** |
675 | * netlbl_mgmt_protocols - Handle a PROTOCOLS message | |
676 | * @skb: the NETLINK buffer | |
677 | * @cb: the NETLINK callback | |
678 | * | |
679 | * Description: | |
680 | * Process a user generated PROTOCOLS message and respond accordingly. | |
681 | * | |
682 | */ | |
683 | static int netlbl_mgmt_protocols(struct sk_buff *skb, | |
684 | struct netlink_callback *cb) | |
685 | { | |
686 | u32 protos_sent = cb->args[0]; | |
687 | ||
688 | if (protos_sent == 0) { | |
689 | if (netlbl_mgmt_protocols_cb(skb, | |
690 | cb, | |
691 | NETLBL_NLTYPE_UNLABELED) < 0) | |
692 | goto protocols_return; | |
693 | protos_sent++; | |
694 | } | |
695 | if (protos_sent == 1) { | |
696 | if (netlbl_mgmt_protocols_cb(skb, | |
697 | cb, | |
698 | NETLBL_NLTYPE_CIPSOV4) < 0) | |
699 | goto protocols_return; | |
700 | protos_sent++; | |
701 | } | |
cb72d382 HD |
702 | #if IS_ENABLED(CONFIG_IPV6) |
703 | if (protos_sent == 2) { | |
704 | if (netlbl_mgmt_protocols_cb(skb, | |
705 | cb, | |
706 | NETLBL_NLTYPE_CALIPSO) < 0) | |
707 | goto protocols_return; | |
708 | protos_sent++; | |
709 | } | |
710 | #endif | |
fd385855 PM |
711 | |
712 | protocols_return: | |
713 | cb->args[0] = protos_sent; | |
714 | return skb->len; | |
715 | } | |
716 | ||
d15c345f PM |
717 | /** |
718 | * netlbl_mgmt_version - Handle a VERSION message | |
719 | * @skb: the NETLINK buffer | |
720 | * @info: the Generic NETLINK info block | |
721 | * | |
722 | * Description: | |
723 | * Process a user generated VERSION message and respond accordingly. Returns | |
724 | * zero on success, negative values on failure. | |
725 | * | |
726 | */ | |
727 | static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info) | |
728 | { | |
729 | int ret_val = -ENOMEM; | |
730 | struct sk_buff *ans_skb = NULL; | |
fd385855 | 731 | void *data; |
d15c345f | 732 | |
339bf98f | 733 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
d15c345f | 734 | if (ans_skb == NULL) |
fd385855 | 735 | return -ENOMEM; |
17c157c8 TG |
736 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
737 | 0, NLBL_MGMT_C_VERSION); | |
fd385855 | 738 | if (data == NULL) |
d15c345f PM |
739 | goto version_failure; |
740 | ||
fd385855 PM |
741 | ret_val = nla_put_u32(ans_skb, |
742 | NLBL_MGMT_A_VERSION, | |
743 | NETLBL_PROTO_VERSION); | |
d15c345f PM |
744 | if (ret_val != 0) |
745 | goto version_failure; | |
746 | ||
fd385855 | 747 | genlmsg_end(ans_skb, data); |
fe785bee | 748 | return genlmsg_reply(ans_skb, info); |
d15c345f PM |
749 | |
750 | version_failure: | |
751 | kfree_skb(ans_skb); | |
d15c345f PM |
752 | return ret_val; |
753 | } | |
754 | ||
755 | ||
756 | /* | |
757 | * NetLabel Generic NETLINK Command Definitions | |
758 | */ | |
759 | ||
4534de83 | 760 | static const struct genl_ops netlbl_mgmt_genl_ops[] = { |
227c43c3 | 761 | { |
d15c345f | 762 | .cmd = NLBL_MGMT_C_ADD, |
ef6243ac | 763 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 764 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
765 | .doit = netlbl_mgmt_add, |
766 | .dumpit = NULL, | |
227c43c3 PE |
767 | }, |
768 | { | |
d15c345f | 769 | .cmd = NLBL_MGMT_C_REMOVE, |
ef6243ac | 770 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 771 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
772 | .doit = netlbl_mgmt_remove, |
773 | .dumpit = NULL, | |
227c43c3 PE |
774 | }, |
775 | { | |
fd385855 | 776 | .cmd = NLBL_MGMT_C_LISTALL, |
ef6243ac | 777 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f | 778 | .flags = 0, |
fd385855 PM |
779 | .doit = NULL, |
780 | .dumpit = netlbl_mgmt_listall, | |
227c43c3 PE |
781 | }, |
782 | { | |
d15c345f | 783 | .cmd = NLBL_MGMT_C_ADDDEF, |
ef6243ac | 784 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 785 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
786 | .doit = netlbl_mgmt_adddef, |
787 | .dumpit = NULL, | |
227c43c3 PE |
788 | }, |
789 | { | |
d15c345f | 790 | .cmd = NLBL_MGMT_C_REMOVEDEF, |
ef6243ac | 791 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
fd385855 | 792 | .flags = GENL_ADMIN_PERM, |
d15c345f PM |
793 | .doit = netlbl_mgmt_removedef, |
794 | .dumpit = NULL, | |
227c43c3 PE |
795 | }, |
796 | { | |
d15c345f | 797 | .cmd = NLBL_MGMT_C_LISTDEF, |
ef6243ac | 798 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f PM |
799 | .flags = 0, |
800 | .doit = netlbl_mgmt_listdef, | |
801 | .dumpit = NULL, | |
227c43c3 PE |
802 | }, |
803 | { | |
fd385855 | 804 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
ef6243ac | 805 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f | 806 | .flags = 0, |
fd385855 PM |
807 | .doit = NULL, |
808 | .dumpit = netlbl_mgmt_protocols, | |
227c43c3 PE |
809 | }, |
810 | { | |
d15c345f | 811 | .cmd = NLBL_MGMT_C_VERSION, |
ef6243ac | 812 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d15c345f PM |
813 | .flags = 0, |
814 | .doit = netlbl_mgmt_version, | |
815 | .dumpit = NULL, | |
227c43c3 | 816 | }, |
d15c345f PM |
817 | }; |
818 | ||
56989f6d | 819 | static struct genl_family netlbl_mgmt_gnl_family __ro_after_init = { |
489111e5 JB |
820 | .hdrsize = 0, |
821 | .name = NETLBL_NLTYPE_MGMT_NAME, | |
822 | .version = NETLBL_PROTO_VERSION, | |
823 | .maxattr = NLBL_MGMT_A_MAX, | |
3b0f31f2 | 824 | .policy = netlbl_mgmt_genl_policy, |
489111e5 JB |
825 | .module = THIS_MODULE, |
826 | .ops = netlbl_mgmt_genl_ops, | |
827 | .n_ops = ARRAY_SIZE(netlbl_mgmt_genl_ops), | |
828 | }; | |
829 | ||
d15c345f PM |
830 | /* |
831 | * NetLabel Generic NETLINK Protocol Functions | |
832 | */ | |
833 | ||
834 | /** | |
835 | * netlbl_mgmt_genl_init - Register the NetLabel management component | |
836 | * | |
837 | * Description: | |
838 | * Register the NetLabel management component with the Generic NETLINK | |
839 | * mechanism. Returns zero on success, negative values on failure. | |
840 | * | |
841 | */ | |
05705e4e | 842 | int __init netlbl_mgmt_genl_init(void) |
d15c345f | 843 | { |
489111e5 | 844 | return genl_register_family(&netlbl_mgmt_gnl_family); |
d15c345f | 845 | } |