blob: bf1ab1a6790d6102005d871359ab6ec211c619dc [file] [log] [blame]
Paul Moore96cb8e32006-08-03 16:48:59 -07001/*
2 * NetLabel CIPSO/IPv4 Support
3 *
4 * This file defines the CIPSO/IPv4 functions for the NetLabel system. The
5 * NetLabel system manages static and dynamic label mappings for network
6 * protocols such as CIPSO and RIPSO.
7 *
8 * Author: Paul Moore <paul.moore@hp.com>
9 *
10 */
11
12/*
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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>
Paul Moore32f50cd2006-09-28 14:51:47 -070035#include <linux/audit.h>
Paul Moore96cb8e32006-08-03 16:48:59 -070036#include <net/sock.h>
37#include <net/netlink.h>
38#include <net/genetlink.h>
39#include <net/netlabel.h>
40#include <net/cipso_ipv4.h>
Paul Moorec783f1c2008-01-29 08:37:52 -050041#include <asm/atomic.h>
Paul Moore96cb8e32006-08-03 16:48:59 -070042
43#include "netlabel_user.h"
44#include "netlabel_cipso_v4.h"
Paul Moore23bcdc12007-07-18 12:28:45 -040045#include "netlabel_mgmt.h"
Paul Mooreb1edeb12008-10-10 10:16:31 -040046#include "netlabel_domainhash.h"
Paul Moore96cb8e32006-08-03 16:48:59 -070047
Paul Moorefd385852006-09-25 15:56:37 -070048/* Argument struct for cipso_v4_doi_walk() */
49struct netlbl_cipsov4_doiwalk_arg {
50 struct netlink_callback *nl_cb;
51 struct sk_buff *skb;
52 u32 seq;
53};
54
Paul Mooreb1edeb12008-10-10 10:16:31 -040055/* Argument struct for netlbl_domhsh_walk() */
56struct netlbl_domhsh_walk_arg {
57 struct netlbl_audit *audit_info;
58 u32 doi;
59};
60
Paul Moore96cb8e32006-08-03 16:48:59 -070061/* NetLabel Generic NETLINK CIPSOv4 family */
62static struct genl_family netlbl_cipsov4_gnl_family = {
63 .id = GENL_ID_GENERATE,
64 .hdrsize = 0,
65 .name = NETLBL_NLTYPE_CIPSOV4_NAME,
66 .version = NETLBL_PROTO_VERSION,
Paul Moorefd385852006-09-25 15:56:37 -070067 .maxattr = NLBL_CIPSOV4_A_MAX,
Paul Moore96cb8e32006-08-03 16:48:59 -070068};
69
Paul Moorefd385852006-09-25 15:56:37 -070070/* NetLabel Netlink attribute policy */
Patrick McHardyef7c79e2007-06-05 12:38:30 -070071static const struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1] = {
Paul Moorefd385852006-09-25 15:56:37 -070072 [NLBL_CIPSOV4_A_DOI] = { .type = NLA_U32 },
73 [NLBL_CIPSOV4_A_MTYPE] = { .type = NLA_U32 },
74 [NLBL_CIPSOV4_A_TAG] = { .type = NLA_U8 },
75 [NLBL_CIPSOV4_A_TAGLST] = { .type = NLA_NESTED },
76 [NLBL_CIPSOV4_A_MLSLVLLOC] = { .type = NLA_U32 },
77 [NLBL_CIPSOV4_A_MLSLVLREM] = { .type = NLA_U32 },
78 [NLBL_CIPSOV4_A_MLSLVL] = { .type = NLA_NESTED },
79 [NLBL_CIPSOV4_A_MLSLVLLST] = { .type = NLA_NESTED },
80 [NLBL_CIPSOV4_A_MLSCATLOC] = { .type = NLA_U32 },
81 [NLBL_CIPSOV4_A_MLSCATREM] = { .type = NLA_U32 },
82 [NLBL_CIPSOV4_A_MLSCAT] = { .type = NLA_NESTED },
83 [NLBL_CIPSOV4_A_MLSCATLST] = { .type = NLA_NESTED },
84};
Paul Moore96cb8e32006-08-03 16:48:59 -070085
86/*
87 * Helper Functions
88 */
89
90/**
Paul Moorefd385852006-09-25 15:56:37 -070091 * netlbl_cipsov4_add_common - Parse the common sections of a ADD message
92 * @info: the Generic NETLINK info block
93 * @doi_def: the CIPSO V4 DOI definition
94 *
95 * Description:
96 * Parse the common sections of a ADD message and fill in the related values
97 * in @doi_def. Returns zero on success, negative values on failure.
98 *
99 */
100static int netlbl_cipsov4_add_common(struct genl_info *info,
101 struct cipso_v4_doi *doi_def)
102{
103 struct nlattr *nla;
104 int nla_rem;
105 u32 iter = 0;
106
107 doi_def->doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
108
109 if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_TAGLST],
110 NLBL_CIPSOV4_A_MAX,
111 netlbl_cipsov4_genl_policy) != 0)
112 return -EINVAL;
113
114 nla_for_each_nested(nla, info->attrs[NLBL_CIPSOV4_A_TAGLST], nla_rem)
Thomas Graf8f4c1f92007-09-12 14:44:36 +0200115 if (nla_type(nla) == NLBL_CIPSOV4_A_TAG) {
Paul Moore2a2f11c2007-01-05 15:08:22 -0500116 if (iter >= CIPSO_V4_TAG_MAXCNT)
Paul Moorefd385852006-09-25 15:56:37 -0700117 return -EINVAL;
118 doi_def->tags[iter++] = nla_get_u8(nla);
119 }
Paul Moore2a2f11c2007-01-05 15:08:22 -0500120 while (iter < CIPSO_V4_TAG_MAXCNT)
121 doi_def->tags[iter++] = CIPSO_V4_TAG_INVALID;
Paul Moorefd385852006-09-25 15:56:37 -0700122
123 return 0;
124}
Paul Moore96cb8e32006-08-03 16:48:59 -0700125
126/*
127 * NetLabel Command Handlers
128 */
129
130/**
131 * netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition
Paul Moorefd385852006-09-25 15:56:37 -0700132 * @info: the Generic NETLINK info block
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500133 * @audit_info: NetLabel audit information
Paul Moore96cb8e32006-08-03 16:48:59 -0700134 *
135 * Description:
Paul Moore15c45f72008-10-10 10:16:34 -0400136 * Create a new CIPSO_V4_MAP_TRANS DOI definition based on the given ADD
137 * message and add it to the CIPSO V4 engine. Return zero on success and
138 * non-zero on error.
Paul Moore96cb8e32006-08-03 16:48:59 -0700139 *
140 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500141static int netlbl_cipsov4_add_std(struct genl_info *info,
142 struct netlbl_audit *audit_info)
Paul Moore96cb8e32006-08-03 16:48:59 -0700143{
144 int ret_val = -EINVAL;
Paul Moore96cb8e32006-08-03 16:48:59 -0700145 struct cipso_v4_doi *doi_def = NULL;
Paul Moorefd385852006-09-25 15:56:37 -0700146 struct nlattr *nla_a;
147 struct nlattr *nla_b;
148 int nla_a_rem;
149 int nla_b_rem;
Paul Moorecaff5b6a2006-12-15 16:49:28 -0500150 u32 iter;
Paul Moore96cb8e32006-08-03 16:48:59 -0700151
Paul Moore32f50cd2006-09-28 14:51:47 -0700152 if (!info->attrs[NLBL_CIPSOV4_A_TAGLST] ||
Paul Moorefd385852006-09-25 15:56:37 -0700153 !info->attrs[NLBL_CIPSOV4_A_MLSLVLLST])
154 return -EINVAL;
155
156 if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
157 NLBL_CIPSOV4_A_MAX,
158 netlbl_cipsov4_genl_policy) != 0)
159 return -EINVAL;
Paul Moore96cb8e32006-08-03 16:48:59 -0700160
161 doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
Paul Moorefd385852006-09-25 15:56:37 -0700162 if (doi_def == NULL)
163 return -ENOMEM;
Paul Moore96cb8e32006-08-03 16:48:59 -0700164 doi_def->map.std = kzalloc(sizeof(*doi_def->map.std), GFP_KERNEL);
165 if (doi_def->map.std == NULL) {
166 ret_val = -ENOMEM;
167 goto add_std_failure;
168 }
Paul Moore15c45f72008-10-10 10:16:34 -0400169 doi_def->type = CIPSO_V4_MAP_TRANS;
Paul Moore96cb8e32006-08-03 16:48:59 -0700170
Paul Moorefd385852006-09-25 15:56:37 -0700171 ret_val = netlbl_cipsov4_add_common(info, doi_def);
172 if (ret_val != 0)
173 goto add_std_failure;
Paul Moore1fd2a252006-12-15 16:49:27 -0500174 ret_val = -EINVAL;
Paul Moorefd385852006-09-25 15:56:37 -0700175
176 nla_for_each_nested(nla_a,
177 info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
178 nla_a_rem)
Thomas Graf8f4c1f92007-09-12 14:44:36 +0200179 if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSLVL) {
Paul Moore1fd2a252006-12-15 16:49:27 -0500180 if (nla_validate_nested(nla_a,
181 NLBL_CIPSOV4_A_MAX,
182 netlbl_cipsov4_genl_policy) != 0)
183 goto add_std_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700184 nla_for_each_nested(nla_b, nla_a, nla_b_rem)
Thomas Graf8f4c1f92007-09-12 14:44:36 +0200185 switch (nla_type(nla_b)) {
Paul Moorefd385852006-09-25 15:56:37 -0700186 case NLBL_CIPSOV4_A_MLSLVLLOC:
Paul Moore1fd2a252006-12-15 16:49:27 -0500187 if (nla_get_u32(nla_b) >
188 CIPSO_V4_MAX_LOC_LVLS)
189 goto add_std_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700190 if (nla_get_u32(nla_b) >=
191 doi_def->map.std->lvl.local_size)
192 doi_def->map.std->lvl.local_size =
193 nla_get_u32(nla_b) + 1;
194 break;
195 case NLBL_CIPSOV4_A_MLSLVLREM:
Paul Moore1fd2a252006-12-15 16:49:27 -0500196 if (nla_get_u32(nla_b) >
197 CIPSO_V4_MAX_REM_LVLS)
198 goto add_std_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700199 if (nla_get_u32(nla_b) >=
200 doi_def->map.std->lvl.cipso_size)
201 doi_def->map.std->lvl.cipso_size =
202 nla_get_u32(nla_b) + 1;
203 break;
204 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700205 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700206 doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
207 sizeof(u32),
208 GFP_KERNEL);
209 if (doi_def->map.std->lvl.local == NULL) {
210 ret_val = -ENOMEM;
211 goto add_std_failure;
212 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700213 doi_def->map.std->lvl.cipso = kcalloc(doi_def->map.std->lvl.cipso_size,
214 sizeof(u32),
215 GFP_KERNEL);
216 if (doi_def->map.std->lvl.cipso == NULL) {
217 ret_val = -ENOMEM;
218 goto add_std_failure;
219 }
Paul Moorecaff5b6a2006-12-15 16:49:28 -0500220 for (iter = 0; iter < doi_def->map.std->lvl.local_size; iter++)
221 doi_def->map.std->lvl.local[iter] = CIPSO_V4_INV_LVL;
222 for (iter = 0; iter < doi_def->map.std->lvl.cipso_size; iter++)
223 doi_def->map.std->lvl.cipso[iter] = CIPSO_V4_INV_LVL;
Paul Moorefd385852006-09-25 15:56:37 -0700224 nla_for_each_nested(nla_a,
225 info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
226 nla_a_rem)
Thomas Graf8f4c1f92007-09-12 14:44:36 +0200227 if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSLVL) {
Paul Moorefd385852006-09-25 15:56:37 -0700228 struct nlattr *lvl_loc;
229 struct nlattr *lvl_rem;
Paul Moore96cb8e32006-08-03 16:48:59 -0700230
Paul Moorefd385852006-09-25 15:56:37 -0700231 lvl_loc = nla_find_nested(nla_a,
232 NLBL_CIPSOV4_A_MLSLVLLOC);
233 lvl_rem = nla_find_nested(nla_a,
234 NLBL_CIPSOV4_A_MLSLVLREM);
235 if (lvl_loc == NULL || lvl_rem == NULL)
236 goto add_std_failure;
237 doi_def->map.std->lvl.local[nla_get_u32(lvl_loc)] =
238 nla_get_u32(lvl_rem);
239 doi_def->map.std->lvl.cipso[nla_get_u32(lvl_rem)] =
240 nla_get_u32(lvl_loc);
241 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700242
Paul Moorefd385852006-09-25 15:56:37 -0700243 if (info->attrs[NLBL_CIPSOV4_A_MLSCATLST]) {
244 if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
245 NLBL_CIPSOV4_A_MAX,
246 netlbl_cipsov4_genl_policy) != 0)
Paul Moore96cb8e32006-08-03 16:48:59 -0700247 goto add_std_failure;
248
Paul Moorefd385852006-09-25 15:56:37 -0700249 nla_for_each_nested(nla_a,
250 info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
251 nla_a_rem)
Thomas Graf8f4c1f92007-09-12 14:44:36 +0200252 if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSCAT) {
Paul Moorefd385852006-09-25 15:56:37 -0700253 if (nla_validate_nested(nla_a,
254 NLBL_CIPSOV4_A_MAX,
255 netlbl_cipsov4_genl_policy) != 0)
256 goto add_std_failure;
257 nla_for_each_nested(nla_b, nla_a, nla_b_rem)
Thomas Graf8f4c1f92007-09-12 14:44:36 +0200258 switch (nla_type(nla_b)) {
Paul Moorefd385852006-09-25 15:56:37 -0700259 case NLBL_CIPSOV4_A_MLSCATLOC:
Paul Moore1fd2a252006-12-15 16:49:27 -0500260 if (nla_get_u32(nla_b) >
261 CIPSO_V4_MAX_LOC_CATS)
262 goto add_std_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700263 if (nla_get_u32(nla_b) >=
264 doi_def->map.std->cat.local_size)
265 doi_def->map.std->cat.local_size =
266 nla_get_u32(nla_b) + 1;
267 break;
268 case NLBL_CIPSOV4_A_MLSCATREM:
Paul Moore1fd2a252006-12-15 16:49:27 -0500269 if (nla_get_u32(nla_b) >
270 CIPSO_V4_MAX_REM_CATS)
271 goto add_std_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700272 if (nla_get_u32(nla_b) >=
273 doi_def->map.std->cat.cipso_size)
274 doi_def->map.std->cat.cipso_size =
275 nla_get_u32(nla_b) + 1;
276 break;
277 }
278 }
Paul Moorefd385852006-09-25 15:56:37 -0700279 doi_def->map.std->cat.local = kcalloc(
YOSHIFUJI Hideakie1a95262007-02-09 23:25:05 +0900280 doi_def->map.std->cat.local_size,
Paul Moorefd385852006-09-25 15:56:37 -0700281 sizeof(u32),
282 GFP_KERNEL);
283 if (doi_def->map.std->cat.local == NULL) {
284 ret_val = -ENOMEM;
285 goto add_std_failure;
286 }
287 doi_def->map.std->cat.cipso = kcalloc(
YOSHIFUJI Hideakie1a95262007-02-09 23:25:05 +0900288 doi_def->map.std->cat.cipso_size,
Paul Moorefd385852006-09-25 15:56:37 -0700289 sizeof(u32),
290 GFP_KERNEL);
291 if (doi_def->map.std->cat.cipso == NULL) {
292 ret_val = -ENOMEM;
293 goto add_std_failure;
294 }
Paul Moorecaff5b6a2006-12-15 16:49:28 -0500295 for (iter = 0; iter < doi_def->map.std->cat.local_size; iter++)
296 doi_def->map.std->cat.local[iter] = CIPSO_V4_INV_CAT;
297 for (iter = 0; iter < doi_def->map.std->cat.cipso_size; iter++)
298 doi_def->map.std->cat.cipso[iter] = CIPSO_V4_INV_CAT;
Paul Moorefd385852006-09-25 15:56:37 -0700299 nla_for_each_nested(nla_a,
300 info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
301 nla_a_rem)
Thomas Graf8f4c1f92007-09-12 14:44:36 +0200302 if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSCAT) {
Paul Moorefd385852006-09-25 15:56:37 -0700303 struct nlattr *cat_loc;
304 struct nlattr *cat_rem;
Paul Moore96cb8e32006-08-03 16:48:59 -0700305
Paul Moorefd385852006-09-25 15:56:37 -0700306 cat_loc = nla_find_nested(nla_a,
307 NLBL_CIPSOV4_A_MLSCATLOC);
308 cat_rem = nla_find_nested(nla_a,
309 NLBL_CIPSOV4_A_MLSCATREM);
310 if (cat_loc == NULL || cat_rem == NULL)
311 goto add_std_failure;
312 doi_def->map.std->cat.local[
YOSHIFUJI Hideakie1a95262007-02-09 23:25:05 +0900313 nla_get_u32(cat_loc)] =
Paul Moorefd385852006-09-25 15:56:37 -0700314 nla_get_u32(cat_rem);
315 doi_def->map.std->cat.cipso[
YOSHIFUJI Hideakie1a95262007-02-09 23:25:05 +0900316 nla_get_u32(cat_rem)] =
Paul Moorefd385852006-09-25 15:56:37 -0700317 nla_get_u32(cat_loc);
318 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700319 }
320
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500321 ret_val = cipso_v4_doi_add(doi_def, audit_info);
Paul Moore96cb8e32006-08-03 16:48:59 -0700322 if (ret_val != 0)
323 goto add_std_failure;
324 return 0;
325
326add_std_failure:
327 if (doi_def)
Paul Mooreb1edeb12008-10-10 10:16:31 -0400328 cipso_v4_doi_free(doi_def);
Paul Moore96cb8e32006-08-03 16:48:59 -0700329 return ret_val;
330}
331
332/**
333 * netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition
Paul Moorefd385852006-09-25 15:56:37 -0700334 * @info: the Generic NETLINK info block
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500335 * @audit_info: NetLabel audit information
Paul Moore96cb8e32006-08-03 16:48:59 -0700336 *
337 * Description:
338 * Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message
339 * and add it to the CIPSO V4 engine. Return zero on success and non-zero on
340 * error.
341 *
342 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500343static int netlbl_cipsov4_add_pass(struct genl_info *info,
344 struct netlbl_audit *audit_info)
Paul Moore96cb8e32006-08-03 16:48:59 -0700345{
Paul Moorefd385852006-09-25 15:56:37 -0700346 int ret_val;
Paul Moore96cb8e32006-08-03 16:48:59 -0700347 struct cipso_v4_doi *doi_def = NULL;
Paul Moore96cb8e32006-08-03 16:48:59 -0700348
Paul Moore32f50cd2006-09-28 14:51:47 -0700349 if (!info->attrs[NLBL_CIPSOV4_A_TAGLST])
Paul Moorefd385852006-09-25 15:56:37 -0700350 return -EINVAL;
Paul Moore96cb8e32006-08-03 16:48:59 -0700351
352 doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
Paul Moorefd385852006-09-25 15:56:37 -0700353 if (doi_def == NULL)
354 return -ENOMEM;
Paul Moore96cb8e32006-08-03 16:48:59 -0700355 doi_def->type = CIPSO_V4_MAP_PASS;
356
Paul Moorefd385852006-09-25 15:56:37 -0700357 ret_val = netlbl_cipsov4_add_common(info, doi_def);
358 if (ret_val != 0)
359 goto add_pass_failure;
Paul Moore96cb8e32006-08-03 16:48:59 -0700360
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500361 ret_val = cipso_v4_doi_add(doi_def, audit_info);
Paul Moore96cb8e32006-08-03 16:48:59 -0700362 if (ret_val != 0)
363 goto add_pass_failure;
364 return 0;
365
366add_pass_failure:
Paul Mooreb1edeb12008-10-10 10:16:31 -0400367 cipso_v4_doi_free(doi_def);
Paul Moore96cb8e32006-08-03 16:48:59 -0700368 return ret_val;
369}
370
371/**
Paul Moored91d4072008-10-10 10:16:34 -0400372 * netlbl_cipsov4_add_local - Adds a CIPSO V4 DOI definition
373 * @info: the Generic NETLINK info block
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500374 * @audit_info: NetLabel audit information
Paul Moored91d4072008-10-10 10:16:34 -0400375 *
376 * Description:
377 * Create a new CIPSO_V4_MAP_LOCAL DOI definition based on the given ADD
378 * message and add it to the CIPSO V4 engine. Return zero on success and
379 * non-zero on error.
380 *
381 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500382static int netlbl_cipsov4_add_local(struct genl_info *info,
383 struct netlbl_audit *audit_info)
Paul Moored91d4072008-10-10 10:16:34 -0400384{
385 int ret_val;
386 struct cipso_v4_doi *doi_def = NULL;
387
388 if (!info->attrs[NLBL_CIPSOV4_A_TAGLST])
389 return -EINVAL;
390
391 doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
392 if (doi_def == NULL)
393 return -ENOMEM;
394 doi_def->type = CIPSO_V4_MAP_LOCAL;
395
396 ret_val = netlbl_cipsov4_add_common(info, doi_def);
397 if (ret_val != 0)
398 goto add_local_failure;
399
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500400 ret_val = cipso_v4_doi_add(doi_def, audit_info);
Paul Moored91d4072008-10-10 10:16:34 -0400401 if (ret_val != 0)
402 goto add_local_failure;
403 return 0;
404
405add_local_failure:
406 cipso_v4_doi_free(doi_def);
407 return ret_val;
408}
409
410/**
Paul Moore96cb8e32006-08-03 16:48:59 -0700411 * netlbl_cipsov4_add - Handle an ADD message
412 * @skb: the NETLINK buffer
413 * @info: the Generic NETLINK info block
414 *
415 * Description:
416 * Create a new DOI definition based on the given ADD message and add it to the
417 * CIPSO V4 engine. Returns zero on success, negative values on failure.
418 *
419 */
420static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
421
422{
423 int ret_val = -EINVAL;
Paul Moore32f50cd2006-09-28 14:51:47 -0700424 const char *type_str = "(unknown)";
Paul Moore95d4e6b2006-09-29 17:05:05 -0700425 struct netlbl_audit audit_info;
Paul Moore96cb8e32006-08-03 16:48:59 -0700426
Paul Moore32f50cd2006-09-28 14:51:47 -0700427 if (!info->attrs[NLBL_CIPSOV4_A_DOI] ||
428 !info->attrs[NLBL_CIPSOV4_A_MTYPE])
Paul Moorefd385852006-09-25 15:56:37 -0700429 return -EINVAL;
Paul Moore96cb8e32006-08-03 16:48:59 -0700430
Paul Moore95d4e6b2006-09-29 17:05:05 -0700431 netlbl_netlink_auditinfo(skb, &audit_info);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500432 switch (nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE])) {
Paul Moore15c45f72008-10-10 10:16:34 -0400433 case CIPSO_V4_MAP_TRANS:
434 type_str = "trans";
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500435 ret_val = netlbl_cipsov4_add_std(info, &audit_info);
Paul Moore96cb8e32006-08-03 16:48:59 -0700436 break;
437 case CIPSO_V4_MAP_PASS:
Paul Moore32f50cd2006-09-28 14:51:47 -0700438 type_str = "pass";
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500439 ret_val = netlbl_cipsov4_add_pass(info, &audit_info);
Paul Moore96cb8e32006-08-03 16:48:59 -0700440 break;
Paul Moored91d4072008-10-10 10:16:34 -0400441 case CIPSO_V4_MAP_LOCAL:
442 type_str = "local";
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500443 ret_val = netlbl_cipsov4_add_local(info, &audit_info);
Paul Moored91d4072008-10-10 10:16:34 -0400444 break;
Paul Moore96cb8e32006-08-03 16:48:59 -0700445 }
Paul Moore23bcdc12007-07-18 12:28:45 -0400446 if (ret_val == 0)
Paul Moorec783f1c2008-01-29 08:37:52 -0500447 atomic_inc(&netlabel_mgmt_protocount);
Paul Moore96cb8e32006-08-03 16:48:59 -0700448
Paul Moore96cb8e32006-08-03 16:48:59 -0700449 return ret_val;
450}
451
452/**
453 * netlbl_cipsov4_list - Handle a LIST message
454 * @skb: the NETLINK buffer
455 * @info: the Generic NETLINK info block
456 *
457 * Description:
Paul Moorefd385852006-09-25 15:56:37 -0700458 * Process a user generated LIST message and respond accordingly. While the
459 * response message generated by the kernel is straightforward, determining
460 * before hand the size of the buffer to allocate is not (we have to generate
461 * the message to know the size). In order to keep this function sane what we
462 * do is allocate a buffer of NLMSG_GOODSIZE and try to fit the response in
463 * that size, if we fail then we restart with a larger buffer and try again.
464 * We continue in this manner until we hit a limit of failed attempts then we
465 * give up and just send an error message. Returns zero on success and
466 * negative values on error.
Paul Moore96cb8e32006-08-03 16:48:59 -0700467 *
468 */
469static int netlbl_cipsov4_list(struct sk_buff *skb, struct genl_info *info)
470{
Paul Moorefd385852006-09-25 15:56:37 -0700471 int ret_val;
472 struct sk_buff *ans_skb = NULL;
473 u32 nlsze_mult = 1;
474 void *data;
Paul Moore96cb8e32006-08-03 16:48:59 -0700475 u32 doi;
Paul Moorefd385852006-09-25 15:56:37 -0700476 struct nlattr *nla_a;
477 struct nlattr *nla_b;
478 struct cipso_v4_doi *doi_def;
479 u32 iter;
Paul Moore96cb8e32006-08-03 16:48:59 -0700480
Paul Moorefd385852006-09-25 15:56:37 -0700481 if (!info->attrs[NLBL_CIPSOV4_A_DOI]) {
482 ret_val = -EINVAL;
Paul Moore96cb8e32006-08-03 16:48:59 -0700483 goto list_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700484 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700485
Paul Moorefd385852006-09-25 15:56:37 -0700486list_start:
Thomas Graf339bf982006-11-10 14:10:15 -0800487 ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE * nlsze_mult, GFP_KERNEL);
Paul Moore96cb8e32006-08-03 16:48:59 -0700488 if (ans_skb == NULL) {
489 ret_val = -ENOMEM;
490 goto list_failure;
491 }
Thomas Graf17c157c2006-11-14 19:46:02 -0800492 data = genlmsg_put_reply(ans_skb, info, &netlbl_cipsov4_gnl_family,
493 0, NLBL_CIPSOV4_C_LIST);
Paul Moorefd385852006-09-25 15:56:37 -0700494 if (data == NULL) {
495 ret_val = -ENOMEM;
496 goto list_failure;
497 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700498
Paul Moorefd385852006-09-25 15:56:37 -0700499 doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
500
501 rcu_read_lock();
502 doi_def = cipso_v4_doi_getdef(doi);
503 if (doi_def == NULL) {
504 ret_val = -EINVAL;
Paul Moore56196702008-10-10 10:16:29 -0400505 goto list_failure_lock;
Paul Moorefd385852006-09-25 15:56:37 -0700506 }
507
508 ret_val = nla_put_u32(ans_skb, NLBL_CIPSOV4_A_MTYPE, doi_def->type);
509 if (ret_val != 0)
510 goto list_failure_lock;
511
512 nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_TAGLST);
513 if (nla_a == NULL) {
514 ret_val = -ENOMEM;
515 goto list_failure_lock;
516 }
517 for (iter = 0;
518 iter < CIPSO_V4_TAG_MAXCNT &&
519 doi_def->tags[iter] != CIPSO_V4_TAG_INVALID;
520 iter++) {
521 ret_val = nla_put_u8(ans_skb,
522 NLBL_CIPSOV4_A_TAG,
523 doi_def->tags[iter]);
524 if (ret_val != 0)
525 goto list_failure_lock;
526 }
527 nla_nest_end(ans_skb, nla_a);
528
529 switch (doi_def->type) {
Paul Moore15c45f72008-10-10 10:16:34 -0400530 case CIPSO_V4_MAP_TRANS:
Paul Moorefd385852006-09-25 15:56:37 -0700531 nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSLVLLST);
532 if (nla_a == NULL) {
533 ret_val = -ENOMEM;
534 goto list_failure_lock;
535 }
536 for (iter = 0;
537 iter < doi_def->map.std->lvl.local_size;
538 iter++) {
539 if (doi_def->map.std->lvl.local[iter] ==
540 CIPSO_V4_INV_LVL)
541 continue;
542
543 nla_b = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSLVL);
544 if (nla_b == NULL) {
545 ret_val = -ENOMEM;
546 goto list_retry;
547 }
548 ret_val = nla_put_u32(ans_skb,
549 NLBL_CIPSOV4_A_MLSLVLLOC,
550 iter);
551 if (ret_val != 0)
552 goto list_retry;
553 ret_val = nla_put_u32(ans_skb,
554 NLBL_CIPSOV4_A_MLSLVLREM,
555 doi_def->map.std->lvl.local[iter]);
556 if (ret_val != 0)
557 goto list_retry;
558 nla_nest_end(ans_skb, nla_b);
559 }
560 nla_nest_end(ans_skb, nla_a);
561
562 nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSCATLST);
563 if (nla_a == NULL) {
564 ret_val = -ENOMEM;
565 goto list_retry;
566 }
567 for (iter = 0;
568 iter < doi_def->map.std->cat.local_size;
569 iter++) {
570 if (doi_def->map.std->cat.local[iter] ==
571 CIPSO_V4_INV_CAT)
572 continue;
573
574 nla_b = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSCAT);
575 if (nla_b == NULL) {
576 ret_val = -ENOMEM;
577 goto list_retry;
578 }
579 ret_val = nla_put_u32(ans_skb,
580 NLBL_CIPSOV4_A_MLSCATLOC,
581 iter);
582 if (ret_val != 0)
583 goto list_retry;
584 ret_val = nla_put_u32(ans_skb,
585 NLBL_CIPSOV4_A_MLSCATREM,
586 doi_def->map.std->cat.local[iter]);
587 if (ret_val != 0)
588 goto list_retry;
589 nla_nest_end(ans_skb, nla_b);
590 }
591 nla_nest_end(ans_skb, nla_a);
592
593 break;
594 }
595 rcu_read_unlock();
596
597 genlmsg_end(ans_skb, data);
Denis V. Lunevfe785be2008-07-10 16:53:39 -0700598 return genlmsg_reply(ans_skb, info);
Paul Moore96cb8e32006-08-03 16:48:59 -0700599
Paul Moorefd385852006-09-25 15:56:37 -0700600list_retry:
601 /* XXX - this limit is a guesstimate */
602 if (nlsze_mult < 4) {
603 rcu_read_unlock();
604 kfree_skb(ans_skb);
Denis V. Lunev83aa2e92008-07-14 22:28:25 -0700605 nlsze_mult *= 2;
Paul Moorefd385852006-09-25 15:56:37 -0700606 goto list_start;
607 }
608list_failure_lock:
609 rcu_read_unlock();
Paul Moore96cb8e32006-08-03 16:48:59 -0700610list_failure:
Paul Moorefd385852006-09-25 15:56:37 -0700611 kfree_skb(ans_skb);
612 return ret_val;
613}
614
615/**
616 * netlbl_cipsov4_listall_cb - cipso_v4_doi_walk() callback for LISTALL
617 * @doi_def: the CIPSOv4 DOI definition
618 * @arg: the netlbl_cipsov4_doiwalk_arg structure
619 *
620 * Description:
621 * This function is designed to be used as a callback to the
622 * cipso_v4_doi_walk() function for use in generating a response for a LISTALL
623 * message. Returns the size of the message on success, negative values on
624 * failure.
625 *
626 */
627static int netlbl_cipsov4_listall_cb(struct cipso_v4_doi *doi_def, void *arg)
628{
629 int ret_val = -ENOMEM;
630 struct netlbl_cipsov4_doiwalk_arg *cb_arg = arg;
631 void *data;
632
Thomas Graf17c157c2006-11-14 19:46:02 -0800633 data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
634 cb_arg->seq, &netlbl_cipsov4_gnl_family,
635 NLM_F_MULTI, NLBL_CIPSOV4_C_LISTALL);
Paul Moorefd385852006-09-25 15:56:37 -0700636 if (data == NULL)
637 goto listall_cb_failure;
638
639 ret_val = nla_put_u32(cb_arg->skb, NLBL_CIPSOV4_A_DOI, doi_def->doi);
640 if (ret_val != 0)
641 goto listall_cb_failure;
642 ret_val = nla_put_u32(cb_arg->skb,
643 NLBL_CIPSOV4_A_MTYPE,
644 doi_def->type);
645 if (ret_val != 0)
646 goto listall_cb_failure;
647
648 return genlmsg_end(cb_arg->skb, data);
649
650listall_cb_failure:
651 genlmsg_cancel(cb_arg->skb, data);
Paul Moore96cb8e32006-08-03 16:48:59 -0700652 return ret_val;
653}
654
655/**
656 * netlbl_cipsov4_listall - Handle a LISTALL message
657 * @skb: the NETLINK buffer
Paul Moorefd385852006-09-25 15:56:37 -0700658 * @cb: the NETLINK callback
Paul Moore96cb8e32006-08-03 16:48:59 -0700659 *
660 * Description:
661 * Process a user generated LISTALL message and respond accordingly. Returns
662 * zero on success and negative values on error.
663 *
664 */
Paul Moorefd385852006-09-25 15:56:37 -0700665static int netlbl_cipsov4_listall(struct sk_buff *skb,
666 struct netlink_callback *cb)
Paul Moore96cb8e32006-08-03 16:48:59 -0700667{
Paul Moorefd385852006-09-25 15:56:37 -0700668 struct netlbl_cipsov4_doiwalk_arg cb_arg;
Paul Moore56196702008-10-10 10:16:29 -0400669 u32 doi_skip = cb->args[0];
Paul Moore96cb8e32006-08-03 16:48:59 -0700670
Paul Moorefd385852006-09-25 15:56:37 -0700671 cb_arg.nl_cb = cb;
672 cb_arg.skb = skb;
673 cb_arg.seq = cb->nlh->nlmsg_seq;
Paul Moore96cb8e32006-08-03 16:48:59 -0700674
Paul Moorefd385852006-09-25 15:56:37 -0700675 cipso_v4_doi_walk(&doi_skip, netlbl_cipsov4_listall_cb, &cb_arg);
Paul Moore96cb8e32006-08-03 16:48:59 -0700676
Paul Moorefd385852006-09-25 15:56:37 -0700677 cb->args[0] = doi_skip;
678 return skb->len;
Paul Moore96cb8e32006-08-03 16:48:59 -0700679}
680
681/**
Paul Mooreb1edeb12008-10-10 10:16:31 -0400682 * netlbl_cipsov4_remove_cb - netlbl_cipsov4_remove() callback for REMOVE
683 * @entry: LSM domain mapping entry
684 * @arg: the netlbl_domhsh_walk_arg structure
685 *
686 * Description:
687 * This function is intended for use by netlbl_cipsov4_remove() as the callback
688 * for the netlbl_domhsh_walk() function; it removes LSM domain map entries
689 * which are associated with the CIPSO DOI specified in @arg. Returns zero on
690 * success, negative values on failure.
691 *
692 */
693static int netlbl_cipsov4_remove_cb(struct netlbl_dom_map *entry, void *arg)
694{
695 struct netlbl_domhsh_walk_arg *cb_arg = arg;
696
697 if (entry->type == NETLBL_NLTYPE_CIPSOV4 &&
698 entry->type_def.cipsov4->doi == cb_arg->doi)
699 return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info);
700
701 return 0;
702}
703
704/**
Paul Moore96cb8e32006-08-03 16:48:59 -0700705 * netlbl_cipsov4_remove - Handle a REMOVE message
706 * @skb: the NETLINK buffer
707 * @info: the Generic NETLINK info block
708 *
709 * Description:
710 * Process a user generated REMOVE message and respond accordingly. Returns
711 * zero on success, negative values on failure.
712 *
713 */
714static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
715{
Paul Moorefd385852006-09-25 15:56:37 -0700716 int ret_val = -EINVAL;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400717 struct netlbl_domhsh_walk_arg cb_arg;
Paul Moore95d4e6b2006-09-29 17:05:05 -0700718 struct netlbl_audit audit_info;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400719 u32 skip_bkt = 0;
720 u32 skip_chain = 0;
Paul Moore96cb8e32006-08-03 16:48:59 -0700721
Paul Moore95d4e6b2006-09-29 17:05:05 -0700722 if (!info->attrs[NLBL_CIPSOV4_A_DOI])
723 return -EINVAL;
Paul Moore32f50cd2006-09-28 14:51:47 -0700724
Paul Moore95d4e6b2006-09-29 17:05:05 -0700725 netlbl_netlink_auditinfo(skb, &audit_info);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500726 cb_arg.doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
Paul Mooreb1edeb12008-10-10 10:16:31 -0400727 cb_arg.audit_info = &audit_info;
728 ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain,
729 netlbl_cipsov4_remove_cb, &cb_arg);
730 if (ret_val == 0 || ret_val == -ENOENT) {
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500731 ret_val = cipso_v4_doi_remove(cb_arg.doi, &audit_info);
Paul Mooreb1edeb12008-10-10 10:16:31 -0400732 if (ret_val == 0)
733 atomic_dec(&netlabel_mgmt_protocount);
734 }
Paul Moore95d4e6b2006-09-29 17:05:05 -0700735
Paul Moore96cb8e32006-08-03 16:48:59 -0700736 return ret_val;
737}
738
739/*
740 * NetLabel Generic NETLINK Command Definitions
741 */
742
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800743static struct genl_ops netlbl_cipsov4_ops[] = {
744 {
Paul Moore96cb8e32006-08-03 16:48:59 -0700745 .cmd = NLBL_CIPSOV4_C_ADD,
Paul Moorefd385852006-09-25 15:56:37 -0700746 .flags = GENL_ADMIN_PERM,
747 .policy = netlbl_cipsov4_genl_policy,
Paul Moore96cb8e32006-08-03 16:48:59 -0700748 .doit = netlbl_cipsov4_add,
749 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800750 },
751 {
Paul Moore96cb8e32006-08-03 16:48:59 -0700752 .cmd = NLBL_CIPSOV4_C_REMOVE,
Paul Moorefd385852006-09-25 15:56:37 -0700753 .flags = GENL_ADMIN_PERM,
754 .policy = netlbl_cipsov4_genl_policy,
Paul Moore96cb8e32006-08-03 16:48:59 -0700755 .doit = netlbl_cipsov4_remove,
756 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800757 },
758 {
Paul Moore96cb8e32006-08-03 16:48:59 -0700759 .cmd = NLBL_CIPSOV4_C_LIST,
760 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700761 .policy = netlbl_cipsov4_genl_policy,
Paul Moore96cb8e32006-08-03 16:48:59 -0700762 .doit = netlbl_cipsov4_list,
763 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800764 },
765 {
Paul Moore96cb8e32006-08-03 16:48:59 -0700766 .cmd = NLBL_CIPSOV4_C_LISTALL,
767 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700768 .policy = netlbl_cipsov4_genl_policy,
769 .doit = NULL,
770 .dumpit = netlbl_cipsov4_listall,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800771 },
Paul Moore96cb8e32006-08-03 16:48:59 -0700772};
773
774/*
775 * NetLabel Generic NETLINK Protocol Functions
776 */
777
778/**
779 * netlbl_cipsov4_genl_init - Register the CIPSOv4 NetLabel component
780 *
781 * Description:
782 * Register the CIPSOv4 packet NetLabel component with the Generic NETLINK
783 * mechanism. Returns zero on success, negative values on failure.
784 *
785 */
Pavel Emelyanov05705e42008-02-17 22:33:57 -0800786int __init netlbl_cipsov4_genl_init(void)
Paul Moore96cb8e32006-08-03 16:48:59 -0700787{
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800788 int ret_val, i;
Paul Moore96cb8e32006-08-03 16:48:59 -0700789
790 ret_val = genl_register_family(&netlbl_cipsov4_gnl_family);
791 if (ret_val != 0)
792 return ret_val;
793
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800794 for (i = 0; i < ARRAY_SIZE(netlbl_cipsov4_ops); i++) {
795 ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
796 &netlbl_cipsov4_ops[i]);
797 if (ret_val != 0)
798 return ret_val;
799 }
Paul Moore96cb8e32006-08-03 16:48:59 -0700800
801 return 0;
802}