blob: 1821c5d50fb8ec448374c04619c30eab07baa15f [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 *
8 * Author: Paul Moore <paul.moore@hp.com>
9 *
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>
Paul Moored15c3452006-08-03 16:48:37 -070037#include <net/sock.h>
38#include <net/netlink.h>
39#include <net/genetlink.h>
Paul Moore63c41682008-10-10 10:16:32 -040040#include <net/ip.h>
41#include <net/ipv6.h>
Paul Moored15c3452006-08-03 16:48:37 -070042#include <net/netlabel.h>
43#include <net/cipso_ipv4.h>
Paul Moorec783f1c2008-01-29 08:37:52 -050044#include <asm/atomic.h>
Paul Moored15c3452006-08-03 16:48:37 -070045
46#include "netlabel_domainhash.h"
47#include "netlabel_user.h"
48#include "netlabel_mgmt.h"
49
Paul Moorec783f1c2008-01-29 08:37:52 -050050/* NetLabel configured protocol counter */
51atomic_t netlabel_mgmt_protocount = ATOMIC_INIT(0);
Paul Moore23bcdc12007-07-18 12:28:45 -040052
Paul Moorefd385852006-09-25 15:56:37 -070053/* Argument struct for netlbl_domhsh_walk() */
54struct netlbl_domhsh_walk_arg {
55 struct netlink_callback *nl_cb;
56 struct sk_buff *skb;
57 u32 seq;
58};
59
Paul Moored15c3452006-08-03 16:48:37 -070060/* NetLabel Generic NETLINK CIPSOv4 family */
61static struct genl_family netlbl_mgmt_gnl_family = {
62 .id = GENL_ID_GENERATE,
63 .hdrsize = 0,
64 .name = NETLBL_NLTYPE_MGMT_NAME,
65 .version = NETLBL_PROTO_VERSION,
Paul Moorefd385852006-09-25 15:56:37 -070066 .maxattr = NLBL_MGMT_A_MAX,
Paul Moored15c3452006-08-03 16:48:37 -070067};
68
Paul Moorefd385852006-09-25 15:56:37 -070069/* NetLabel Netlink attribute policy */
Patrick McHardyef7c79e2007-06-05 12:38:30 -070070static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
Paul Moorefd385852006-09-25 15:56:37 -070071 [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING },
72 [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 },
73 [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 },
74 [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 },
75};
Paul Moored15c3452006-08-03 16:48:37 -070076
77/*
Paul Moore63c41682008-10-10 10:16:32 -040078 * Helper Functions
79 */
80
81/**
82 * netlbl_mgmt_add - Handle an ADD message
83 * @info: the Generic NETLINK info block
84 * @audit_info: NetLabel audit information
85 *
86 * Description:
87 * Helper function for the ADD and ADDDEF messages to add the domain mappings
88 * from the message to the hash table. See netlabel.h for a description of the
89 * message format. Returns zero on success, negative values on failure.
90 *
91 */
92static int netlbl_mgmt_add_common(struct genl_info *info,
93 struct netlbl_audit *audit_info)
94{
95 int ret_val = -EINVAL;
96 struct netlbl_dom_map *entry = NULL;
97 struct netlbl_domaddr_map *addrmap = NULL;
98 struct cipso_v4_doi *cipsov4 = NULL;
99 u32 tmp_val;
100
101 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
102 if (entry == NULL) {
103 ret_val = -ENOMEM;
104 goto add_failure;
105 }
106 entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
107 if (info->attrs[NLBL_MGMT_A_DOMAIN]) {
108 size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
109 entry->domain = kmalloc(tmp_size, GFP_KERNEL);
110 if (entry->domain == NULL) {
111 ret_val = -ENOMEM;
112 goto add_failure;
113 }
114 nla_strlcpy(entry->domain,
115 info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
116 }
117
118 /* NOTE: internally we allow/use a entry->type value of
119 * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users
120 * to pass that as a protocol value because we need to know the
121 * "real" protocol */
122
123 switch (entry->type) {
124 case NETLBL_NLTYPE_UNLABELED:
125 break;
126 case NETLBL_NLTYPE_CIPSOV4:
127 if (!info->attrs[NLBL_MGMT_A_CV4DOI])
128 goto add_failure;
129
130 tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
131 cipsov4 = cipso_v4_doi_getdef(tmp_val);
132 if (cipsov4 == NULL)
133 goto add_failure;
134 entry->type_def.cipsov4 = cipsov4;
135 break;
136 default:
137 goto add_failure;
138 }
139
140 if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) {
141 struct in_addr *addr;
142 struct in_addr *mask;
143 struct netlbl_domaddr4_map *map;
144
145 addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
146 if (addrmap == NULL) {
147 ret_val = -ENOMEM;
148 goto add_failure;
149 }
150 INIT_LIST_HEAD(&addrmap->list4);
151 INIT_LIST_HEAD(&addrmap->list6);
152
153 if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) !=
154 sizeof(struct in_addr)) {
155 ret_val = -EINVAL;
156 goto add_failure;
157 }
158 if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) !=
159 sizeof(struct in_addr)) {
160 ret_val = -EINVAL;
161 goto add_failure;
162 }
163 addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]);
164 mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]);
165
166 map = kzalloc(sizeof(*map), GFP_KERNEL);
167 if (map == NULL) {
168 ret_val = -ENOMEM;
169 goto add_failure;
170 }
171 map->list.addr = addr->s_addr & mask->s_addr;
172 map->list.mask = mask->s_addr;
173 map->list.valid = 1;
174 map->type = entry->type;
175 if (cipsov4)
176 map->type_def.cipsov4 = cipsov4;
177
178 ret_val = netlbl_af4list_add(&map->list, &addrmap->list4);
179 if (ret_val != 0) {
180 kfree(map);
181 goto add_failure;
182 }
183
184 entry->type = NETLBL_NLTYPE_ADDRSELECT;
185 entry->type_def.addrsel = addrmap;
186#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
187 } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) {
188 struct in6_addr *addr;
189 struct in6_addr *mask;
190 struct netlbl_domaddr6_map *map;
191
192 addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
193 if (addrmap == NULL) {
194 ret_val = -ENOMEM;
195 goto add_failure;
196 }
197 INIT_LIST_HEAD(&addrmap->list4);
198 INIT_LIST_HEAD(&addrmap->list6);
199
200 if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) !=
201 sizeof(struct in6_addr)) {
202 ret_val = -EINVAL;
203 goto add_failure;
204 }
205 if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) !=
206 sizeof(struct in6_addr)) {
207 ret_val = -EINVAL;
208 goto add_failure;
209 }
210 addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]);
211 mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]);
212
213 map = kzalloc(sizeof(*map), GFP_KERNEL);
214 if (map == NULL) {
215 ret_val = -ENOMEM;
216 goto add_failure;
217 }
218 ipv6_addr_copy(&map->list.addr, addr);
219 map->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
220 map->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
221 map->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
222 map->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
223 ipv6_addr_copy(&map->list.mask, mask);
224 map->list.valid = 1;
225 map->type = entry->type;
226
227 ret_val = netlbl_af6list_add(&map->list, &addrmap->list6);
228 if (ret_val != 0) {
229 kfree(map);
230 goto add_failure;
231 }
232
233 entry->type = NETLBL_NLTYPE_ADDRSELECT;
234 entry->type_def.addrsel = addrmap;
235#endif /* IPv6 */
236 }
237
238 ret_val = netlbl_domhsh_add(entry, audit_info);
239 if (ret_val != 0)
240 goto add_failure;
241
242 return 0;
243
244add_failure:
245 if (cipsov4)
246 cipso_v4_doi_putdef(cipsov4);
247 if (entry)
248 kfree(entry->domain);
249 kfree(addrmap);
250 kfree(entry);
251 return ret_val;
252}
253
254/**
255 * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry
256 * @skb: the NETLINK buffer
257 * @entry: the map entry
258 *
259 * Description:
260 * This function is a helper function used by the LISTALL and LISTDEF command
261 * handlers. The caller is responsibile for ensuring that the RCU read lock
262 * is held. Returns zero on success, negative values on failure.
263 *
264 */
265static int netlbl_mgmt_listentry(struct sk_buff *skb,
266 struct netlbl_dom_map *entry)
267{
Paul Mooref8a02472008-10-29 16:09:12 -0400268 int ret_val = 0;
Paul Moore63c41682008-10-10 10:16:32 -0400269 struct nlattr *nla_a;
270 struct nlattr *nla_b;
271 struct netlbl_af4list *iter4;
272#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
273 struct netlbl_af6list *iter6;
274#endif
275
276 if (entry->domain != NULL) {
277 ret_val = nla_put_string(skb,
278 NLBL_MGMT_A_DOMAIN, entry->domain);
279 if (ret_val != 0)
280 return ret_val;
281 }
282
283 switch (entry->type) {
284 case NETLBL_NLTYPE_ADDRSELECT:
285 nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST);
286 if (nla_a == NULL)
287 return -ENOMEM;
288
289 netlbl_af4list_foreach_rcu(iter4,
290 &entry->type_def.addrsel->list4) {
291 struct netlbl_domaddr4_map *map4;
292 struct in_addr addr_struct;
293
294 nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
295 if (nla_b == NULL)
296 return -ENOMEM;
297
298 addr_struct.s_addr = iter4->addr;
299 ret_val = nla_put(skb, NLBL_MGMT_A_IPV4ADDR,
300 sizeof(struct in_addr),
301 &addr_struct);
302 if (ret_val != 0)
303 return ret_val;
304 addr_struct.s_addr = iter4->mask;
305 ret_val = nla_put(skb, NLBL_MGMT_A_IPV4MASK,
306 sizeof(struct in_addr),
307 &addr_struct);
308 if (ret_val != 0)
309 return ret_val;
310 map4 = netlbl_domhsh_addr4_entry(iter4);
311 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
312 map4->type);
313 if (ret_val != 0)
314 return ret_val;
315 switch (map4->type) {
316 case NETLBL_NLTYPE_CIPSOV4:
317 ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
318 map4->type_def.cipsov4->doi);
319 if (ret_val != 0)
320 return ret_val;
321 break;
322 }
323
324 nla_nest_end(skb, nla_b);
325 }
326#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
327 netlbl_af6list_foreach_rcu(iter6,
328 &entry->type_def.addrsel->list6) {
329 struct netlbl_domaddr6_map *map6;
330
331 nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
332 if (nla_b == NULL)
333 return -ENOMEM;
334
335 ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR,
336 sizeof(struct in6_addr),
337 &iter6->addr);
338 if (ret_val != 0)
339 return ret_val;
340 ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK,
341 sizeof(struct in6_addr),
342 &iter6->mask);
343 if (ret_val != 0)
344 return ret_val;
345 map6 = netlbl_domhsh_addr6_entry(iter6);
346 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
347 map6->type);
348 if (ret_val != 0)
349 return ret_val;
350
351 nla_nest_end(skb, nla_b);
352 }
353#endif /* IPv6 */
354
355 nla_nest_end(skb, nla_a);
356 break;
357 case NETLBL_NLTYPE_UNLABELED:
358 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
359 break;
360 case NETLBL_NLTYPE_CIPSOV4:
361 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
362 if (ret_val != 0)
363 return ret_val;
364 ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
365 entry->type_def.cipsov4->doi);
366 break;
367 }
368
369 return ret_val;
370}
371
372/*
Paul Moored15c3452006-08-03 16:48:37 -0700373 * NetLabel Command Handlers
374 */
375
376/**
377 * netlbl_mgmt_add - Handle an ADD message
378 * @skb: the NETLINK buffer
379 * @info: the Generic NETLINK info block
380 *
381 * Description:
382 * Process a user generated ADD message and add the domains from the message
383 * to the hash table. See netlabel.h for a description of the message format.
384 * Returns zero on success, negative values on failure.
385 *
386 */
387static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info)
388{
Paul Moore95d4e6b2006-09-29 17:05:05 -0700389 struct netlbl_audit audit_info;
Paul Moored15c3452006-08-03 16:48:37 -0700390
Paul Moore63c41682008-10-10 10:16:32 -0400391 if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) ||
392 (!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
393 (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
394 info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
395 (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
396 info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
397 ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
398 (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
399 ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
400 (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
401 return -EINVAL;
Paul Moorefd385852006-09-25 15:56:37 -0700402
Paul Moore95d4e6b2006-09-29 17:05:05 -0700403 netlbl_netlink_auditinfo(skb, &audit_info);
404
Paul Moore63c41682008-10-10 10:16:32 -0400405 return netlbl_mgmt_add_common(info, &audit_info);
Paul Moored15c3452006-08-03 16:48:37 -0700406}
407
408/**
409 * netlbl_mgmt_remove - Handle a REMOVE message
410 * @skb: the NETLINK buffer
411 * @info: the Generic NETLINK info block
412 *
413 * Description:
414 * Process a user generated REMOVE message and remove the specified domain
415 * mappings. Returns zero on success, negative values on failure.
416 *
417 */
418static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info)
419{
Paul Moorefd385852006-09-25 15:56:37 -0700420 char *domain;
Paul Moore95d4e6b2006-09-29 17:05:05 -0700421 struct netlbl_audit audit_info;
Paul Moored15c3452006-08-03 16:48:37 -0700422
Paul Moorefd385852006-09-25 15:56:37 -0700423 if (!info->attrs[NLBL_MGMT_A_DOMAIN])
424 return -EINVAL;
425
Paul Moore95d4e6b2006-09-29 17:05:05 -0700426 netlbl_netlink_auditinfo(skb, &audit_info);
427
Paul Moorefd385852006-09-25 15:56:37 -0700428 domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]);
Paul Moore95d4e6b2006-09-29 17:05:05 -0700429 return netlbl_domhsh_remove(domain, &audit_info);
Paul Moorefd385852006-09-25 15:56:37 -0700430}
431
432/**
433 * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL
434 * @entry: the domain mapping hash table entry
435 * @arg: the netlbl_domhsh_walk_arg structure
436 *
437 * Description:
438 * This function is designed to be used as a callback to the
439 * netlbl_domhsh_walk() function for use in generating a response for a LISTALL
440 * message. Returns the size of the message on success, negative values on
441 * failure.
442 *
443 */
444static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
445{
446 int ret_val = -ENOMEM;
447 struct netlbl_domhsh_walk_arg *cb_arg = arg;
448 void *data;
449
Thomas Graf17c157c2006-11-14 19:46:02 -0800450 data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
451 cb_arg->seq, &netlbl_mgmt_gnl_family,
452 NLM_F_MULTI, NLBL_MGMT_C_LISTALL);
Paul Moorefd385852006-09-25 15:56:37 -0700453 if (data == NULL)
454 goto listall_cb_failure;
455
Paul Moore63c41682008-10-10 10:16:32 -0400456 ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry);
Paul Moored15c3452006-08-03 16:48:37 -0700457 if (ret_val != 0)
Paul Moorefd385852006-09-25 15:56:37 -0700458 goto listall_cb_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700459
Paul Moorefd385852006-09-25 15:56:37 -0700460 cb_arg->seq++;
461 return genlmsg_end(cb_arg->skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700462
Paul Moorefd385852006-09-25 15:56:37 -0700463listall_cb_failure:
464 genlmsg_cancel(cb_arg->skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700465 return ret_val;
466}
467
468/**
Paul Moorefd385852006-09-25 15:56:37 -0700469 * netlbl_mgmt_listall - Handle a LISTALL message
Paul Moored15c3452006-08-03 16:48:37 -0700470 * @skb: the NETLINK buffer
Paul Moorefd385852006-09-25 15:56:37 -0700471 * @cb: the NETLINK callback
Paul Moored15c3452006-08-03 16:48:37 -0700472 *
473 * Description:
Paul Moorefd385852006-09-25 15:56:37 -0700474 * Process a user generated LISTALL message and dumps the domain hash table in
475 * a form suitable for use in a kernel generated LISTALL message. Returns zero
476 * on success, negative values on failure.
Paul Moored15c3452006-08-03 16:48:37 -0700477 *
478 */
Paul Moorefd385852006-09-25 15:56:37 -0700479static int netlbl_mgmt_listall(struct sk_buff *skb,
480 struct netlink_callback *cb)
Paul Moored15c3452006-08-03 16:48:37 -0700481{
Paul Moorefd385852006-09-25 15:56:37 -0700482 struct netlbl_domhsh_walk_arg cb_arg;
483 u32 skip_bkt = cb->args[0];
484 u32 skip_chain = cb->args[1];
Paul Moored15c3452006-08-03 16:48:37 -0700485
Paul Moorefd385852006-09-25 15:56:37 -0700486 cb_arg.nl_cb = cb;
487 cb_arg.skb = skb;
488 cb_arg.seq = cb->nlh->nlmsg_seq;
Paul Moored15c3452006-08-03 16:48:37 -0700489
Paul Moorefd385852006-09-25 15:56:37 -0700490 netlbl_domhsh_walk(&skip_bkt,
491 &skip_chain,
492 netlbl_mgmt_listall_cb,
493 &cb_arg);
Paul Moored15c3452006-08-03 16:48:37 -0700494
Paul Moorefd385852006-09-25 15:56:37 -0700495 cb->args[0] = skip_bkt;
496 cb->args[1] = skip_chain;
497 return skb->len;
Paul Moored15c3452006-08-03 16:48:37 -0700498}
499
500/**
501 * netlbl_mgmt_adddef - Handle an ADDDEF message
502 * @skb: the NETLINK buffer
503 * @info: the Generic NETLINK info block
504 *
505 * Description:
506 * Process a user generated ADDDEF message and respond accordingly. Returns
507 * zero on success, negative values on failure.
508 *
509 */
510static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info)
511{
Paul Moore95d4e6b2006-09-29 17:05:05 -0700512 struct netlbl_audit audit_info;
Paul Moored15c3452006-08-03 16:48:37 -0700513
Paul Moore63c41682008-10-10 10:16:32 -0400514 if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
515 (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
516 info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
517 (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
518 info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
519 ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
520 (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
521 ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
522 (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
523 return -EINVAL;
Paul Moored15c3452006-08-03 16:48:37 -0700524
Paul Moore95d4e6b2006-09-29 17:05:05 -0700525 netlbl_netlink_auditinfo(skb, &audit_info);
526
Paul Moore63c41682008-10-10 10:16:32 -0400527 return netlbl_mgmt_add_common(info, &audit_info);
Paul Moored15c3452006-08-03 16:48:37 -0700528}
529
530/**
531 * netlbl_mgmt_removedef - Handle a REMOVEDEF message
532 * @skb: the NETLINK buffer
533 * @info: the Generic NETLINK info block
534 *
535 * Description:
536 * Process a user generated REMOVEDEF message and remove the default domain
537 * mapping. Returns zero on success, negative values on failure.
538 *
539 */
540static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info)
541{
Paul Moore95d4e6b2006-09-29 17:05:05 -0700542 struct netlbl_audit audit_info;
543
544 netlbl_netlink_auditinfo(skb, &audit_info);
545
546 return netlbl_domhsh_remove_default(&audit_info);
Paul Moored15c3452006-08-03 16:48:37 -0700547}
548
549/**
550 * netlbl_mgmt_listdef - Handle a LISTDEF message
551 * @skb: the NETLINK buffer
552 * @info: the Generic NETLINK info block
553 *
554 * Description:
555 * Process a user generated LISTDEF message and dumps the default domain
556 * mapping in a form suitable for use in a kernel generated LISTDEF message.
557 * Returns zero on success, negative values on failure.
558 *
559 */
560static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
561{
562 int ret_val = -ENOMEM;
Paul Moorefd385852006-09-25 15:56:37 -0700563 struct sk_buff *ans_skb = NULL;
564 void *data;
565 struct netlbl_dom_map *entry;
Paul Moored15c3452006-08-03 16:48:37 -0700566
Thomas Graf339bf982006-11-10 14:10:15 -0800567 ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Paul Moored15c3452006-08-03 16:48:37 -0700568 if (ans_skb == NULL)
Paul Moorefd385852006-09-25 15:56:37 -0700569 return -ENOMEM;
Thomas Graf17c157c2006-11-14 19:46:02 -0800570 data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
571 0, NLBL_MGMT_C_LISTDEF);
Paul Moorefd385852006-09-25 15:56:37 -0700572 if (data == NULL)
Paul Moored15c3452006-08-03 16:48:37 -0700573 goto listdef_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700574
Paul Moorefd385852006-09-25 15:56:37 -0700575 rcu_read_lock();
576 entry = netlbl_domhsh_getentry(NULL);
577 if (entry == NULL) {
578 ret_val = -ENOENT;
579 goto listdef_failure_lock;
580 }
Paul Moore63c41682008-10-10 10:16:32 -0400581 ret_val = netlbl_mgmt_listentry(ans_skb, entry);
Paul Moorefd385852006-09-25 15:56:37 -0700582 rcu_read_unlock();
Paul Moore63c41682008-10-10 10:16:32 -0400583 if (ret_val != 0)
584 goto listdef_failure;
Paul Moorefd385852006-09-25 15:56:37 -0700585
586 genlmsg_end(ans_skb, data);
Denis V. Lunevfe785be2008-07-10 16:53:39 -0700587 return genlmsg_reply(ans_skb, info);
Paul Moored15c3452006-08-03 16:48:37 -0700588
Paul Moorefd385852006-09-25 15:56:37 -0700589listdef_failure_lock:
590 rcu_read_unlock();
Paul Moored15c3452006-08-03 16:48:37 -0700591listdef_failure:
Paul Moorefd385852006-09-25 15:56:37 -0700592 kfree_skb(ans_skb);
Paul Moored15c3452006-08-03 16:48:37 -0700593 return ret_val;
594}
595
596/**
Paul Moorefd385852006-09-25 15:56:37 -0700597 * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response
598 * @skb: the skb to write to
Paul Moorefd385852006-09-25 15:56:37 -0700599 * @cb: the NETLINK callback
600 * @protocol: the NetLabel protocol to use in the message
Paul Moored15c3452006-08-03 16:48:37 -0700601 *
602 * Description:
Paul Moorefd385852006-09-25 15:56:37 -0700603 * This function is to be used in conjunction with netlbl_mgmt_protocols() to
604 * answer a application's PROTOCOLS message. Returns the size of the message
605 * on success, negative values on failure.
Paul Moored15c3452006-08-03 16:48:37 -0700606 *
607 */
Paul Moorefd385852006-09-25 15:56:37 -0700608static int netlbl_mgmt_protocols_cb(struct sk_buff *skb,
609 struct netlink_callback *cb,
610 u32 protocol)
Paul Moored15c3452006-08-03 16:48:37 -0700611{
612 int ret_val = -ENOMEM;
Paul Moorefd385852006-09-25 15:56:37 -0700613 void *data;
Paul Moored15c3452006-08-03 16:48:37 -0700614
Thomas Graf17c157c2006-11-14 19:46:02 -0800615 data = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
616 &netlbl_mgmt_gnl_family, NLM_F_MULTI,
617 NLBL_MGMT_C_PROTOCOLS);
Paul Moorefd385852006-09-25 15:56:37 -0700618 if (data == NULL)
619 goto protocols_cb_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700620
Paul Moorefd385852006-09-25 15:56:37 -0700621 ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol);
Paul Moored15c3452006-08-03 16:48:37 -0700622 if (ret_val != 0)
Paul Moorefd385852006-09-25 15:56:37 -0700623 goto protocols_cb_failure;
Paul Moored15c3452006-08-03 16:48:37 -0700624
Paul Moorefd385852006-09-25 15:56:37 -0700625 return genlmsg_end(skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700626
Paul Moorefd385852006-09-25 15:56:37 -0700627protocols_cb_failure:
628 genlmsg_cancel(skb, data);
Paul Moored15c3452006-08-03 16:48:37 -0700629 return ret_val;
630}
631
632/**
Paul Moorefd385852006-09-25 15:56:37 -0700633 * netlbl_mgmt_protocols - Handle a PROTOCOLS message
634 * @skb: the NETLINK buffer
635 * @cb: the NETLINK callback
636 *
637 * Description:
638 * Process a user generated PROTOCOLS message and respond accordingly.
639 *
640 */
641static int netlbl_mgmt_protocols(struct sk_buff *skb,
642 struct netlink_callback *cb)
643{
644 u32 protos_sent = cb->args[0];
645
646 if (protos_sent == 0) {
647 if (netlbl_mgmt_protocols_cb(skb,
648 cb,
649 NETLBL_NLTYPE_UNLABELED) < 0)
650 goto protocols_return;
651 protos_sent++;
652 }
653 if (protos_sent == 1) {
654 if (netlbl_mgmt_protocols_cb(skb,
655 cb,
656 NETLBL_NLTYPE_CIPSOV4) < 0)
657 goto protocols_return;
658 protos_sent++;
659 }
660
661protocols_return:
662 cb->args[0] = protos_sent;
663 return skb->len;
664}
665
666/**
Paul Moored15c3452006-08-03 16:48:37 -0700667 * netlbl_mgmt_version - Handle a VERSION message
668 * @skb: the NETLINK buffer
669 * @info: the Generic NETLINK info block
670 *
671 * Description:
672 * Process a user generated VERSION message and respond accordingly. Returns
673 * zero on success, negative values on failure.
674 *
675 */
676static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info)
677{
678 int ret_val = -ENOMEM;
679 struct sk_buff *ans_skb = NULL;
Paul Moorefd385852006-09-25 15:56:37 -0700680 void *data;
Paul Moored15c3452006-08-03 16:48:37 -0700681
Thomas Graf339bf982006-11-10 14:10:15 -0800682 ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Paul Moored15c3452006-08-03 16:48:37 -0700683 if (ans_skb == NULL)
Paul Moorefd385852006-09-25 15:56:37 -0700684 return -ENOMEM;
Thomas Graf17c157c2006-11-14 19:46:02 -0800685 data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
686 0, NLBL_MGMT_C_VERSION);
Paul Moorefd385852006-09-25 15:56:37 -0700687 if (data == NULL)
Paul Moored15c3452006-08-03 16:48:37 -0700688 goto version_failure;
689
Paul Moorefd385852006-09-25 15:56:37 -0700690 ret_val = nla_put_u32(ans_skb,
691 NLBL_MGMT_A_VERSION,
692 NETLBL_PROTO_VERSION);
Paul Moored15c3452006-08-03 16:48:37 -0700693 if (ret_val != 0)
694 goto version_failure;
695
Paul Moorefd385852006-09-25 15:56:37 -0700696 genlmsg_end(ans_skb, data);
Denis V. Lunevfe785be2008-07-10 16:53:39 -0700697 return genlmsg_reply(ans_skb, info);
Paul Moored15c3452006-08-03 16:48:37 -0700698
699version_failure:
700 kfree_skb(ans_skb);
Paul Moored15c3452006-08-03 16:48:37 -0700701 return ret_val;
702}
703
704
705/*
706 * NetLabel Generic NETLINK Command Definitions
707 */
708
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800709static struct genl_ops netlbl_mgmt_genl_ops[] = {
710 {
Paul Moored15c3452006-08-03 16:48:37 -0700711 .cmd = NLBL_MGMT_C_ADD,
Paul Moorefd385852006-09-25 15:56:37 -0700712 .flags = GENL_ADMIN_PERM,
713 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700714 .doit = netlbl_mgmt_add,
715 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800716 },
717 {
Paul Moored15c3452006-08-03 16:48:37 -0700718 .cmd = NLBL_MGMT_C_REMOVE,
Paul Moorefd385852006-09-25 15:56:37 -0700719 .flags = GENL_ADMIN_PERM,
720 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700721 .doit = netlbl_mgmt_remove,
722 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800723 },
724 {
Paul Moorefd385852006-09-25 15:56:37 -0700725 .cmd = NLBL_MGMT_C_LISTALL,
Paul Moored15c3452006-08-03 16:48:37 -0700726 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700727 .policy = netlbl_mgmt_genl_policy,
728 .doit = NULL,
729 .dumpit = netlbl_mgmt_listall,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800730 },
731 {
Paul Moored15c3452006-08-03 16:48:37 -0700732 .cmd = NLBL_MGMT_C_ADDDEF,
Paul Moorefd385852006-09-25 15:56:37 -0700733 .flags = GENL_ADMIN_PERM,
734 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700735 .doit = netlbl_mgmt_adddef,
736 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800737 },
738 {
Paul Moored15c3452006-08-03 16:48:37 -0700739 .cmd = NLBL_MGMT_C_REMOVEDEF,
Paul Moorefd385852006-09-25 15:56:37 -0700740 .flags = GENL_ADMIN_PERM,
741 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700742 .doit = netlbl_mgmt_removedef,
743 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800744 },
745 {
Paul Moored15c3452006-08-03 16:48:37 -0700746 .cmd = NLBL_MGMT_C_LISTDEF,
747 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700748 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700749 .doit = netlbl_mgmt_listdef,
750 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800751 },
752 {
Paul Moorefd385852006-09-25 15:56:37 -0700753 .cmd = NLBL_MGMT_C_PROTOCOLS,
Paul Moored15c3452006-08-03 16:48:37 -0700754 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700755 .policy = netlbl_mgmt_genl_policy,
756 .doit = NULL,
757 .dumpit = netlbl_mgmt_protocols,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800758 },
759 {
Paul Moored15c3452006-08-03 16:48:37 -0700760 .cmd = NLBL_MGMT_C_VERSION,
761 .flags = 0,
Paul Moorefd385852006-09-25 15:56:37 -0700762 .policy = netlbl_mgmt_genl_policy,
Paul Moored15c3452006-08-03 16:48:37 -0700763 .doit = netlbl_mgmt_version,
764 .dumpit = NULL,
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800765 },
Paul Moored15c3452006-08-03 16:48:37 -0700766};
767
768/*
769 * NetLabel Generic NETLINK Protocol Functions
770 */
771
772/**
773 * netlbl_mgmt_genl_init - Register the NetLabel management component
774 *
775 * Description:
776 * Register the NetLabel management component with the Generic NETLINK
777 * mechanism. Returns zero on success, negative values on failure.
778 *
779 */
Pavel Emelyanov05705e42008-02-17 22:33:57 -0800780int __init netlbl_mgmt_genl_init(void)
Paul Moored15c3452006-08-03 16:48:37 -0700781{
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800782 int ret_val, i;
Paul Moored15c3452006-08-03 16:48:37 -0700783
784 ret_val = genl_register_family(&netlbl_mgmt_gnl_family);
785 if (ret_val != 0)
786 return ret_val;
787
Pavel Emelyanov227c43c2008-02-17 22:33:16 -0800788 for (i = 0; i < ARRAY_SIZE(netlbl_mgmt_genl_ops); i++) {
789 ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
790 &netlbl_mgmt_genl_ops[i]);
791 if (ret_val != 0)
792 return ret_val;
793 }
Paul Moored15c3452006-08-03 16:48:37 -0700794
795 return 0;
796}