blob: 4809e2e48b02542931d436188680f9663a6dd699 [file] [log] [blame]
Paul Moored15c3452006-08-03 16:48:37 -07001/*
2 * NetLabel Management Support
3 *
4 * This file defines the management functions for the NetLabel system. The
5 * NetLabel system manages static and dynamic label mappings for network
6 * protocols such as CIPSO and RIPSO.
7 *
Paul Moore82c21bf2011-08-01 11:10:33 +00008 * Author: Paul Moore <paul@paul-moore.com>
Paul Moored15c3452006-08-03 16:48:37 -07009 *
10 */
11
12/*
Paul Moore63c41682008-10-10 10:16:32 -040013 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
Paul Moored15c3452006-08-03 16:48:37 -070014 *
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 Moore63c41682008-10-10 10:16:32 -040035#include <linux/in.h>
36#include <linux/in6.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
Paul Moored15c3452006-08-03 16:48:37 -070038#include <net/sock.h>
39#include <net/netlink.h>
40#include <net/genetlink.h>
Paul Moore63c41682008-10-10 10:16:32 -040041#include <net/ip.h>
42#include <net/ipv6.h>
Paul Moored15c3452006-08-03 16:48:37 -070043#include <net/netlabel.h>
44#include <net/cipso_ipv4.h>
Arun Sharma60063492011-07-26 16:09:06 -070045#include <linux/atomic.h>
Paul Moored15c3452006-08-03 16:48:37 -070046
47#include "netlabel_domainhash.h"
48#include "netlabel_user.h"
49#include "netlabel_mgmt.h"
50
Paul Moorec783f1c2008-01-29 08:37:52 -050051/* NetLabel configured protocol counter */
52atomic_t netlabel_mgmt_protocount = ATOMIC_INIT(0);
Paul Moore23bcdc12007-07-18 12:28:45 -040053
Paul Moorefd385852006-09-25 15:56:37 -070054/* Argument struct for netlbl_domhsh_walk() */
55struct netlbl_domhsh_walk_arg {
56 struct netlink_callback *nl_cb;
57 struct sk_buff *skb;
58 u32 seq;
59};
60
Paul Moored15c3452006-08-03 16:48:37 -070061/* NetLabel Generic NETLINK CIPSOv4 family */
62static struct genl_family netlbl_mgmt_gnl_family = {
63 .id = GENL_ID_GENERATE,
64 .hdrsize = 0,
65 .name = NETLBL_NLTYPE_MGMT_NAME,
66 .version = NETLBL_PROTO_VERSION,
Paul Moorefd385852006-09-25 15:56:37 -070067 .maxattr = NLBL_MGMT_A_MAX,
Paul Moored15c3452006-08-03 16:48:37 -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_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
Paul Moorefd385852006-09-25 15:56:37 -070072 [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING },
73 [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 },
74 [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 },
75 [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 },
76};
Paul Moored15c3452006-08-03 16:48:37 -070077
78/*
Paul Moore63c41682008-10-10 10:16:32 -040079 * Helper Functions
80 */
81
82/**
83 * netlbl_mgmt_add - Handle an ADD message
84 * @info: the Generic NETLINK info block
85 * @audit_info: NetLabel audit information
86 *
87 * Description:
88 * Helper function for the ADD and ADDDEF messages to add the domain mappings
89 * from the message to the hash table. See netlabel.h for a description of the
90 * message format. Returns zero on success, negative values on failure.
91 *
92 */
93static int netlbl_mgmt_add_common(struct genl_info *info,
94 struct netlbl_audit *audit_info)
95{
96 int ret_val = -EINVAL;
97 struct netlbl_dom_map *entry = NULL;
98 struct netlbl_domaddr_map *addrmap = NULL;
99 struct cipso_v4_doi *cipsov4 = NULL;
100 u32 tmp_val;
101
102 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
103 if (entry == NULL) {
104 ret_val = -ENOMEM;
105 goto add_failure;
106 }
107 entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
108 if (info->attrs[NLBL_MGMT_A_DOMAIN]) {
109 size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
110 entry->domain = kmalloc(tmp_size, GFP_KERNEL);
111 if (entry->domain == NULL) {
112 ret_val = -ENOMEM;
113 goto add_failure;
114 }
115 nla_strlcpy(entry->domain,
116 info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
117 }
118
119 /* NOTE: internally we allow/use a entry->type value of
120 * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users
121 * to pass that as a protocol value because we need to know the
122 * "real" protocol */
123
124 switch (entry->type) {
125 case NETLBL_NLTYPE_UNLABELED:
126 break;
127 case NETLBL_NLTYPE_CIPSOV4:
128 if (!info->attrs[NLBL_MGMT_A_CV4DOI])
129 goto add_failure;
130
131 tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
132 cipsov4 = cipso_v4_doi_getdef(tmp_val);
133 if (cipsov4 == NULL)
134 goto add_failure;
135 entry->type_def.cipsov4 = cipsov4;
136 break;
137 default:
138 goto add_failure;
139 }
140
141 if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) {
142 struct in_addr *addr;
143 struct in_addr *mask;
144 struct netlbl_domaddr4_map *map;
145
146 addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
147 if (addrmap == NULL) {
148 ret_val = -ENOMEM;
149 goto add_failure;
150 }
151 INIT_LIST_HEAD(&addrmap->list4);
152 INIT_LIST_HEAD(&addrmap->list6);
153
154 if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) !=
155 sizeof(struct in_addr)) {
156 ret_val = -EINVAL;
157 goto add_failure;
158 }
159 if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) !=
160 sizeof(struct in_addr)) {
161 ret_val = -EINVAL;
162 goto add_failure;
163 }
164 addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]);
165 mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]);
166
167 map = kzalloc(sizeof(*map), GFP_KERNEL);
168 if (map == NULL) {
169 ret_val = -ENOMEM;
170 goto add_failure;
171 }
172 map->list.addr = addr->s_addr & mask->s_addr;
173 map->list.mask = mask->s_addr;
174 map->list.valid = 1;
175 map->type = entry->type;
176 if (cipsov4)
177 map->type_def.cipsov4 = cipsov4;
178
179 ret_val = netlbl_af4list_add(&map->list, &addrmap->list4);
180 if (ret_val != 0) {
181 kfree(map);
182 goto add_failure;
183 }
184
185 entry->type = NETLBL_NLTYPE_ADDRSELECT;
186 entry->type_def.addrsel = addrmap;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000187#if IS_ENABLED(CONFIG_IPV6)
Paul Moore63c41682008-10-10 10:16:32 -0400188 } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) {
189 struct in6_addr *addr;
190 struct in6_addr *mask;
191 struct netlbl_domaddr6_map *map;
192
193 addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
194 if (addrmap == NULL) {
195 ret_val = -ENOMEM;
196 goto add_failure;
197 }
198 INIT_LIST_HEAD(&addrmap->list4);
199 INIT_LIST_HEAD(&addrmap->list6);
200
201 if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) !=
202 sizeof(struct in6_addr)) {
203 ret_val = -EINVAL;
204 goto add_failure;
205 }
206 if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) !=
207 sizeof(struct in6_addr)) {
208 ret_val = -EINVAL;
209 goto add_failure;
210 }
211 addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]);
212 mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]);
213
214 map = kzalloc(sizeof(*map), GFP_KERNEL);
215 if (map == NULL) {
216 ret_val = -ENOMEM;
217 goto add_failure;
218 }
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000219 map->list.addr = *addr;
Paul Moore63c41682008-10-10 10:16:32 -0400220 map->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
221 map->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
222 map->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
223 map->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000224 map->list.mask = *mask;
Paul Moore63c41682008-10-10 10:16:32 -0400225 map->list.valid = 1;
226 map->type = entry->type;
227
228 ret_val = netlbl_af6list_add(&map->list, &addrmap->list6);
229 if (ret_val != 0) {
230 kfree(map);
231 goto add_failure;
232 }
233
234 entry->type = NETLBL_NLTYPE_ADDRSELECT;
235 entry->type_def.addrsel = addrmap;
236#endif /* IPv6 */
237 }
238
239 ret_val = netlbl_domhsh_add(entry, audit_info);
240 if (ret_val != 0)
241 goto add_failure;
242
243 return 0;
244
245add_failure:
246 if (cipsov4)
247 cipso_v4_doi_putdef(cipsov4);
248 if (entry)
249 kfree(entry->domain);
250 kfree(addrmap);
251 kfree(entry);
252 return ret_val;
253}
254
255/**
256 * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry
257 * @skb: the NETLINK buffer
258 * @entry: the map entry
259 *
260 * Description:
261 * This function is a helper function used by the LISTALL and LISTDEF command
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300262 * handlers. The caller is responsible for ensuring that the RCU read lock
Paul Moore63c41682008-10-10 10:16:32 -0400263 * is held. Returns zero on success, negative values on failure.
264 *
265 */
266static int netlbl_mgmt_listentry(struct sk_buff *skb,
267 struct netlbl_dom_map *entry)
268{
Paul Mooref8a02472008-10-29 16:09:12 -0400269 int ret_val = 0;
Paul Moore63c41682008-10-10 10:16:32 -0400270 struct nlattr *nla_a;
271 struct nlattr *nla_b;
272 struct netlbl_af4list *iter4;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000273#if IS_ENABLED(CONFIG_IPV6)
Paul Moore63c41682008-10-10 10:16:32 -0400274 struct netlbl_af6list *iter6;
275#endif
276
277 if (entry->domain != NULL) {
278 ret_val = nla_put_string(skb,
279 NLBL_MGMT_A_DOMAIN, entry->domain);
280 if (ret_val != 0)
281 return ret_val;
282 }
283
284 switch (entry->type) {
285 case NETLBL_NLTYPE_ADDRSELECT:
286 nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST);
287 if (nla_a == NULL)
288 return -ENOMEM;
289
290 netlbl_af4list_foreach_rcu(iter4,
291 &entry->type_def.addrsel->list4) {
292 struct netlbl_domaddr4_map *map4;
293 struct in_addr addr_struct;
294
295 nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
296 if (nla_b == NULL)
297 return -ENOMEM;
298
299 addr_struct.s_addr = iter4->addr;
300 ret_val = nla_put(skb, NLBL_MGMT_A_IPV4ADDR,
301 sizeof(struct in_addr),
302 &addr_struct);
303 if (ret_val != 0)
304 return ret_val;
305 addr_struct.s_addr = iter4->mask;
306 ret_val = nla_put(skb, NLBL_MGMT_A_IPV4MASK,
307 sizeof(struct in_addr),
308 &addr_struct);
309 if (ret_val != 0)
310 return ret_val;
311 map4 = netlbl_domhsh_addr4_entry(iter4);
312 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
313 map4->type);
314 if (ret_val != 0)
315 return ret_val;
316 switch (map4->type) {
317 case NETLBL_NLTYPE_CIPSOV4:
318 ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
319 map4->type_def.cipsov4->doi);
320 if (ret_val != 0)
321 return ret_val;
322 break;
323 }
324
325 nla_nest_end(skb, nla_b);
326 }
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000327#if IS_ENABLED(CONFIG_IPV6)
Paul Moore63c41682008-10-10 10:16:32 -0400328 netlbl_af6list_foreach_rcu(iter6,
329 &entry->type_def.addrsel->list6) {
330 struct netlbl_domaddr6_map *map6;
331
332 nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
333 if (nla_b == NULL)
334 return -ENOMEM;
335
336 ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR,
337 sizeof(struct in6_addr),
338 &iter6->addr);
339 if (ret_val != 0)
340 return ret_val;
341 ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK,
342 sizeof(struct in6_addr),
343 &iter6->mask);
344 if (ret_val != 0)
345 return ret_val;
346 map6 = netlbl_domhsh_addr6_entry(iter6);
347 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
348 map6->type);
349 if (ret_val != 0)
350 return ret_val;
351
352 nla_nest_end(skb, nla_b);
353 }
354#endif /* IPv6 */
355
356 nla_nest_end(skb, nla_a);
357 break;
358 case NETLBL_NLTYPE_UNLABELED:
359 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
360 break;
361 case NETLBL_NLTYPE_CIPSOV4:
362 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
363 if (ret_val != 0)
364 return ret_val;
365 ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
366 entry->type_def.cipsov4->doi);
367 break;
368 }
369
370 return ret_val;
371}
372
373/*
Paul Moored15c3452006-08-03 16:48:37 -0700374 * NetLabel Command Handlers
375 */
376
377/**
378 * netlbl_mgmt_add - Handle an ADD message
379 * @skb: the NETLINK buffer
380 * @info: the Generic NETLINK info block
381 *
382 * Description:
383 * Process a user generated ADD message and add the domains from the message
384 * to the hash table. See netlabel.h for a description of the message format.
385 * Returns zero on success, negative values on failure.
386 *
387 */
388static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info)
389{
Paul Moore95d4e6b2006-09-29 17:05:05 -0700390 struct netlbl_audit audit_info;
Paul Moored15c3452006-08-03 16:48:37 -0700391
Paul Moore63c41682008-10-10 10:16:32 -0400392 if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) ||
393 (!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
394 (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
395 info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
396 (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
397 info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
398 ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
399 (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
400 ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
401 (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
402 return -EINVAL;
Paul Moorefd385852006-09-25 15:56:37 -0700403
Paul Moore95d4e6b2006-09-29 17:05:05 -0700404 netlbl_netlink_auditinfo(skb, &audit_info);
405
Paul Moore63c41682008-10-10 10:16:32 -0400406 return netlbl_mgmt_add_common(info, &audit_info);
Paul Moored15c3452006-08-03 16:48:37 -0700407}
408
409/**
410 * netlbl_mgmt_remove - Handle a REMOVE message
411 * @skb: the NETLINK buffer
412 * @info: the Generic NETLINK info block
413 *
414 * Description:
415 * Process a user generated REMOVE message and remove the specified domain
416 * mappings. Returns zero on success, negative values on failure.
417 *
418 */
419static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info)
420{
Paul Moorefd385852006-09-25 15:56:37 -0700421 char *domain;
Paul Moore95d4e6b2006-09-29 17:05:05 -0700422 struct netlbl_audit audit_info;
Paul Moored15c3452006-08-03 16:48:37 -0700423
Paul Moorefd385852006-09-25 15:56:37 -0700424 if (!info->attrs[NLBL_MGMT_A_DOMAIN])
425 return -EINVAL;
426
Paul Moore95d4e6b2006-09-29 17:05:05 -0700427 netlbl_netlink_auditinfo(skb, &audit_info);
428
Paul Moorefd385852006-09-25 15:56:37 -0700429 domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]);
Paul Moore95d4e6b2006-09-29 17:05:05 -0700430 return netlbl_domhsh_remove(domain, &audit_info);
Paul Moorefd385852006-09-25 15:56:37 -0700431}
432
433/**
434 * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL
435 * @entry: the domain mapping hash table entry
436 * @arg: the netlbl_domhsh_walk_arg structure
437 *
438 * Description:
439 * This function is designed to be used as a callback to the
440 * netlbl_domhsh_walk() function for use in generating a response for a LISTALL
441 * message. Returns the size of the message on success, negative values on
442 * failure.
443 *
444 */
445static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
446{
447 int ret_val = -ENOMEM;
448 struct netlbl_domhsh_walk_arg *cb_arg = arg;
449 void *data;
450
Thomas Graf17c157c2006-11-14 19:46:02 -0800451 data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
452 cb_arg->seq, &netlbl_mgmt_gnl_family,
453 NLM_F_MULTI, NLBL_MGMT_C_LISTALL);
Paul Moorefd385852006-09-25 15:56:37 -0700454 if (data == NULL)
455 goto listall_cb_failure;
456
Paul Moore63c41682008-10-10 10:16:32 -0400457 ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry);
Paul Moored15c3452006-08-03 16:48:37 -0700458 if (ret_val != 0)
Paul Moorefd385852006-09-25 15:56:37 -0700459 goto listall_cb_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700460
Paul Moorefd385852006-09-25 15:56:37 -0700461 cb_arg->seq++;
462 return genlmsg_end(cb_arg->skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700463
Paul Moorefd385852006-09-25 15:56:37 -0700464listall_cb_failure:
465 genlmsg_cancel(cb_arg->skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700466 return ret_val;
467}
468
469/**
Paul Moorefd385852006-09-25 15:56:37 -0700470 * netlbl_mgmt_listall - Handle a LISTALL message
Paul Moored15c3452006-08-03 16:48:37 -0700471 * @skb: the NETLINK buffer
Paul Moorefd385852006-09-25 15:56:37 -0700472 * @cb: the NETLINK callback
Paul Moored15c3452006-08-03 16:48:37 -0700473 *
474 * Description:
Paul Moorefd385852006-09-25 15:56:37 -0700475 * Process a user generated LISTALL message and dumps the domain hash table in
476 * a form suitable for use in a kernel generated LISTALL message. Returns zero
477 * on success, negative values on failure.
Paul Moored15c3452006-08-03 16:48:37 -0700478 *
479 */
Paul Moorefd385852006-09-25 15:56:37 -0700480static int netlbl_mgmt_listall(struct sk_buff *skb,
481 struct netlink_callback *cb)
Paul Moored15c3452006-08-03 16:48:37 -0700482{
Paul Moorefd385852006-09-25 15:56:37 -0700483 struct netlbl_domhsh_walk_arg cb_arg;
484 u32 skip_bkt = cb->args[0];
485 u32 skip_chain = cb->args[1];
Paul Moored15c3452006-08-03 16:48:37 -0700486
Paul Moorefd385852006-09-25 15:56:37 -0700487 cb_arg.nl_cb = cb;
488 cb_arg.skb = skb;
489 cb_arg.seq = cb->nlh->nlmsg_seq;
Paul Moored15c3452006-08-03 16:48:37 -0700490
Paul Moorefd385852006-09-25 15:56:37 -0700491 netlbl_domhsh_walk(&skip_bkt,
492 &skip_chain,
493 netlbl_mgmt_listall_cb,
494 &cb_arg);
Paul Moored15c3452006-08-03 16:48:37 -0700495
Paul Moorefd385852006-09-25 15:56:37 -0700496 cb->args[0] = skip_bkt;
497 cb->args[1] = skip_chain;
498 return skb->len;
Paul Moored15c3452006-08-03 16:48:37 -0700499}
500
501/**
502 * netlbl_mgmt_adddef - Handle an ADDDEF message
503 * @skb: the NETLINK buffer
504 * @info: the Generic NETLINK info block
505 *
506 * Description:
507 * Process a user generated ADDDEF message and respond accordingly. Returns
508 * zero on success, negative values on failure.
509 *
510 */
511static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info)
512{
Paul Moore95d4e6b2006-09-29 17:05:05 -0700513 struct netlbl_audit audit_info;
Paul Moored15c3452006-08-03 16:48:37 -0700514
Paul Moore63c41682008-10-10 10:16:32 -0400515 if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
516 (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
517 info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
518 (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
519 info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
520 ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
521 (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
522 ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
523 (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
524 return -EINVAL;
Paul Moored15c3452006-08-03 16:48:37 -0700525
Paul Moore95d4e6b2006-09-29 17:05:05 -0700526 netlbl_netlink_auditinfo(skb, &audit_info);
527
Paul Moore63c41682008-10-10 10:16:32 -0400528 return netlbl_mgmt_add_common(info, &audit_info);
Paul Moored15c3452006-08-03 16:48:37 -0700529}
530
531/**
532 * netlbl_mgmt_removedef - Handle a REMOVEDEF message
533 * @skb: the NETLINK buffer
534 * @info: the Generic NETLINK info block
535 *
536 * Description:
537 * Process a user generated REMOVEDEF message and remove the default domain
538 * mapping. Returns zero on success, negative values on failure.
539 *
540 */
541static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info)
542{
Paul Moore95d4e6b2006-09-29 17:05:05 -0700543 struct netlbl_audit audit_info;
544
545 netlbl_netlink_auditinfo(skb, &audit_info);
546
547 return netlbl_domhsh_remove_default(&audit_info);
Paul Moored15c3452006-08-03 16:48:37 -0700548}
549
550/**
551 * netlbl_mgmt_listdef - Handle a LISTDEF message
552 * @skb: the NETLINK buffer
553 * @info: the Generic NETLINK info block
554 *
555 * Description:
556 * Process a user generated LISTDEF message and dumps the default domain
557 * mapping in a form suitable for use in a kernel generated LISTDEF message.
558 * Returns zero on success, negative values on failure.
559 *
560 */
561static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
562{
563 int ret_val = -ENOMEM;
Paul Moorefd385852006-09-25 15:56:37 -0700564 struct sk_buff *ans_skb = NULL;
565 void *data;
566 struct netlbl_dom_map *entry;
Paul Moored15c3452006-08-03 16:48:37 -0700567
Thomas Graf339bf982006-11-10 14:10:15 -0800568 ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Paul Moored15c3452006-08-03 16:48:37 -0700569 if (ans_skb == NULL)
Paul Moorefd385852006-09-25 15:56:37 -0700570 return -ENOMEM;
Thomas Graf17c157c2006-11-14 19:46:02 -0800571 data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
572 0, NLBL_MGMT_C_LISTDEF);
Paul Moorefd385852006-09-25 15:56:37 -0700573 if (data == NULL)
Paul Moored15c3452006-08-03 16:48:37 -0700574 goto listdef_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700575
Paul Moorefd385852006-09-25 15:56:37 -0700576 rcu_read_lock();
577 entry = netlbl_domhsh_getentry(NULL);
578 if (entry == NULL) {
579 ret_val = -ENOENT;
580 goto listdef_failure_lock;
581 }
Paul Moore63c41682008-10-10 10:16:32 -0400582 ret_val = netlbl_mgmt_listentry(ans_skb, entry);
Paul Moorefd385852006-09-25 15:56:37 -0700583 rcu_read_unlock();
Paul Moore63c41682008-10-10 10:16:32 -0400584 if (ret_val != 0)
585 goto listdef_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700586
587 genlmsg_end(ans_skb, data);
Denis V. Lunevfe785be2008-07-10 16:53:39 -0700588 return genlmsg_reply(ans_skb, info);
Paul Moored15c3452006-08-03 16:48:37 -0700589
Paul Moorefd385852006-09-25 15:56:37 -0700590listdef_failure_lock:
591 rcu_read_unlock();
Paul Moored15c3452006-08-03 16:48:37 -0700592listdef_failure:
Paul Moorefd385852006-09-25 15:56:37 -0700593 kfree_skb(ans_skb);
Paul Moored15c3452006-08-03 16:48:37 -0700594 return ret_val;
595}
596
597/**
Paul Moorefd385852006-09-25 15:56:37 -0700598 * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response
599 * @skb: the skb to write to
Paul Moorefd385852006-09-25 15:56:37 -0700600 * @cb: the NETLINK callback
601 * @protocol: the NetLabel protocol to use in the message
Paul Moored15c3452006-08-03 16:48:37 -0700602 *
603 * Description:
Paul Moorefd385852006-09-25 15:56:37 -0700604 * This function is to be used in conjunction with netlbl_mgmt_protocols() to
605 * answer a application's PROTOCOLS message. Returns the size of the message
606 * on success, negative values on failure.
Paul Moored15c3452006-08-03 16:48:37 -0700607 *
608 */
Paul Moorefd385852006-09-25 15:56:37 -0700609static int netlbl_mgmt_protocols_cb(struct sk_buff *skb,
610 struct netlink_callback *cb,
611 u32 protocol)
Paul Moored15c3452006-08-03 16:48:37 -0700612{
613 int ret_val = -ENOMEM;
Paul Moorefd385852006-09-25 15:56:37 -0700614 void *data;
Paul Moored15c3452006-08-03 16:48:37 -0700615
Thomas Graf17c157c2006-11-14 19:46:02 -0800616 data = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
617 &netlbl_mgmt_gnl_family, NLM_F_MULTI,
618 NLBL_MGMT_C_PROTOCOLS);
Paul Moorefd385852006-09-25 15:56:37 -0700619 if (data == NULL)
620 goto protocols_cb_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700621
Paul Moorefd385852006-09-25 15:56:37 -0700622 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol);
Paul Moored15c3452006-08-03 16:48:37 -0700623 if (ret_val != 0)
Paul Moorefd385852006-09-25 15:56:37 -0700624 goto protocols_cb_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700625
Paul Moorefd385852006-09-25 15:56:37 -0700626 return genlmsg_end(skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700627
Paul Moorefd385852006-09-25 15:56:37 -0700628protocols_cb_failure:
629 genlmsg_cancel(skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700630 return ret_val;
631}
632
633/**
Paul Moorefd385852006-09-25 15:56:37 -0700634 * netlbl_mgmt_protocols - Handle a PROTOCOLS message
635 * @skb: the NETLINK buffer
636 * @cb: the NETLINK callback
637 *
638 * Description:
639 * Process a user generated PROTOCOLS message and respond accordingly.
640 *
641 */
642static int netlbl_mgmt_protocols(struct sk_buff *skb,
643 struct netlink_callback *cb)
644{
645 u32 protos_sent = cb->args[0];
646
647 if (protos_sent == 0) {
648 if (netlbl_mgmt_protocols_cb(skb,
649 cb,
650 NETLBL_NLTYPE_UNLABELED) < 0)
651 goto protocols_return;
652 protos_sent++;
653 }
654 if (protos_sent == 1) {
655 if (netlbl_mgmt_protocols_cb(skb,
656 cb,
657 NETLBL_NLTYPE_CIPSOV4) < 0)
658 goto protocols_return;
659 protos_sent++;
660 }
661
662protocols_return:
663 cb->args[0] = protos_sent;
664 return skb->len;
665}
666
667/**
Paul Moored15c3452006-08-03 16:48:37 -0700668 * netlbl_mgmt_version - Handle a VERSION message
669 * @skb: the NETLINK buffer
670 * @info: the Generic NETLINK info block
671 *
672 * Description:
673 * Process a user generated VERSION message and respond accordingly. Returns
674 * zero on success, negative values on failure.
675 *
676 */
677static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info)
678{
679 int ret_val = -ENOMEM;
680 struct sk_buff *ans_skb = NULL;
Paul Moorefd385852006-09-25 15:56:37 -0700681 void *data;
Paul Moored15c3452006-08-03 16:48:37 -0700682
Thomas Graf339bf982006-11-10 14:10:15 -0800683 ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Paul Moored15c3452006-08-03 16:48:37 -0700684 if (ans_skb == NULL)
Paul Moorefd385852006-09-25 15:56:37 -0700685 return -ENOMEM;
Thomas Graf17c157c2006-11-14 19:46:02 -0800686 data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
687 0, NLBL_MGMT_C_VERSION);
Paul Moorefd385852006-09-25 15:56:37 -0700688 if (data == NULL)
Paul Moored15c3452006-08-03 16:48:37 -0700689 goto version_failure;
690
Paul Moorefd385852006-09-25 15:56:37 -0700691 ret_val = nla_put_u32(ans_skb,
692 NLBL_MGMT_A_VERSION,
693 NETLBL_PROTO_VERSION);
Paul Moored15c3452006-08-03 16:48:37 -0700694 if (ret_val != 0)
695 goto version_failure;
696
Paul Moorefd385852006-09-25 15:56:37 -0700697 genlmsg_end(ans_skb, data);
Denis V. Lunevfe785be2008-07-10 16:53:39 -0700698 return genlmsg_reply(ans_skb, info);
Paul Moored15c3452006-08-03 16:48:37 -0700699
700version_failure:
701 kfree_skb(ans_skb);
Paul Moored15c3452006-08-03 16:48:37 -0700702 return ret_val;
703}
704
705
706/*
707 * NetLabel Generic NETLINK Command Definitions
708 */
709
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800710static struct genl_ops netlbl_mgmt_genl_ops[] = {
711 {
Paul Moored15c3452006-08-03 16:48:37 -0700712 .cmd = NLBL_MGMT_C_ADD,
Paul Moorefd385852006-09-25 15:56:37 -0700713 .flags = GENL_ADMIN_PERM,
714 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700715 .doit = netlbl_mgmt_add,
716 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800717 },
718 {
Paul Moored15c3452006-08-03 16:48:37 -0700719 .cmd = NLBL_MGMT_C_REMOVE,
Paul Moorefd385852006-09-25 15:56:37 -0700720 .flags = GENL_ADMIN_PERM,
721 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700722 .doit = netlbl_mgmt_remove,
723 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800724 },
725 {
Paul Moorefd385852006-09-25 15:56:37 -0700726 .cmd = NLBL_MGMT_C_LISTALL,
Paul Moored15c3452006-08-03 16:48:37 -0700727 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700728 .policy = netlbl_mgmt_genl_policy,
729 .doit = NULL,
730 .dumpit = netlbl_mgmt_listall,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800731 },
732 {
Paul Moored15c3452006-08-03 16:48:37 -0700733 .cmd = NLBL_MGMT_C_ADDDEF,
Paul Moorefd385852006-09-25 15:56:37 -0700734 .flags = GENL_ADMIN_PERM,
735 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700736 .doit = netlbl_mgmt_adddef,
737 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800738 },
739 {
Paul Moored15c3452006-08-03 16:48:37 -0700740 .cmd = NLBL_MGMT_C_REMOVEDEF,
Paul Moorefd385852006-09-25 15:56:37 -0700741 .flags = GENL_ADMIN_PERM,
742 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700743 .doit = netlbl_mgmt_removedef,
744 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800745 },
746 {
Paul Moored15c3452006-08-03 16:48:37 -0700747 .cmd = NLBL_MGMT_C_LISTDEF,
748 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700749 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700750 .doit = netlbl_mgmt_listdef,
751 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800752 },
753 {
Paul Moorefd385852006-09-25 15:56:37 -0700754 .cmd = NLBL_MGMT_C_PROTOCOLS,
Paul Moored15c3452006-08-03 16:48:37 -0700755 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700756 .policy = netlbl_mgmt_genl_policy,
757 .doit = NULL,
758 .dumpit = netlbl_mgmt_protocols,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800759 },
760 {
Paul Moored15c3452006-08-03 16:48:37 -0700761 .cmd = NLBL_MGMT_C_VERSION,
762 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700763 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700764 .doit = netlbl_mgmt_version,
765 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800766 },
Paul Moored15c3452006-08-03 16:48:37 -0700767};
768
769/*
770 * NetLabel Generic NETLINK Protocol Functions
771 */
772
773/**
774 * netlbl_mgmt_genl_init - Register the NetLabel management component
775 *
776 * Description:
777 * Register the NetLabel management component with the Generic NETLINK
778 * mechanism. Returns zero on success, negative values on failure.
779 *
780 */
Pavel Emelyanov05705e42008-02-17 22:33:57 -0800781int __init netlbl_mgmt_genl_init(void)
Paul Moored15c3452006-08-03 16:48:37 -0700782{
Michał Mirosław7ae740d2009-05-21 10:34:05 +0000783 return genl_register_family_with_ops(&netlbl_mgmt_gnl_family,
784 netlbl_mgmt_genl_ops, ARRAY_SIZE(netlbl_mgmt_genl_ops));
Paul Moored15c3452006-08-03 16:48:37 -0700785}