1 |
/* |
2 |
* fs/tomoyo_network.c |
3 |
* |
4 |
* Implementation of the Domain-Based Mandatory Access Control. |
5 |
* |
6 |
* Copyright (C) 2005-2008 NTT DATA CORPORATION |
7 |
* |
8 |
* Version: 1.6.0 2008/04/01 |
9 |
* |
10 |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
11 |
* See README.ccs for ChangeLog. |
12 |
* |
13 |
*/ |
14 |
|
15 |
#include <linux/ccs_common.h> |
16 |
#include <linux/tomoyo.h> |
17 |
#include <linux/realpath.h> |
18 |
#include <net/ip.h> |
19 |
|
20 |
/** |
21 |
* audit_network_log - Audit network log. |
22 |
* |
23 |
* @is_ipv6: True if @address is an IPv6 address. |
24 |
* @operation: The name of operation. |
25 |
* @address: An IPv4 or IPv6 address. |
26 |
* @port: Port number. |
27 |
* @is_granted: True if this is a granted log. |
28 |
* @profile: Profile number used. |
29 |
* @mode: Access control mode used. |
30 |
* |
31 |
* Returns 0 on success, negative value otherwise. |
32 |
*/ |
33 |
static int audit_network_log(const bool is_ipv6, const char *operation, |
34 |
const char *address, const u16 port, |
35 |
const bool is_granted, |
36 |
const u8 profile, const u8 mode) |
37 |
{ |
38 |
char *buf; |
39 |
int len = 256; |
40 |
int len2; |
41 |
if (ccs_can_save_audit_log(is_granted) < 0) |
42 |
return -ENOMEM; |
43 |
buf = ccs_init_audit_log(&len, profile, mode, NULL); |
44 |
if (!buf) |
45 |
return -ENOMEM; |
46 |
len2 = strlen(buf); |
47 |
snprintf(buf + len2, len - len2 - 1, KEYWORD_ALLOW_NETWORK "%s %s %u\n", |
48 |
operation, address, port); |
49 |
return ccs_write_audit_log(buf, is_granted); |
50 |
} |
51 |
|
52 |
/** |
53 |
* save_ipv6_address - Keep the given IPv6 address on the RAM. |
54 |
* |
55 |
* @addr: Pointer to "struct in6_addr". |
56 |
* |
57 |
* Returns pointer to "struct in6_addr" on success, NULL otherwise. |
58 |
* |
59 |
* The RAM is shared, so NEVER try to modify or kfree() the returned address. |
60 |
*/ |
61 |
static const struct in6_addr *save_ipv6_address(const struct in6_addr *addr) |
62 |
{ |
63 |
static const u8 block_size = 16; |
64 |
struct addr_list { |
65 |
struct in6_addr addr[block_size]; |
66 |
struct list1_head list; |
67 |
u32 in_use_count; |
68 |
}; |
69 |
static LIST1_HEAD(address_list); |
70 |
struct addr_list *ptr; |
71 |
static DEFINE_MUTEX(lock); |
72 |
u8 i = block_size; |
73 |
if (!addr) |
74 |
return NULL; |
75 |
mutex_lock(&lock); |
76 |
list1_for_each_entry(ptr, &address_list, list) { |
77 |
for (i = 0; i < ptr->in_use_count; i++) { |
78 |
if (!memcmp(&ptr->addr[i], addr, sizeof(*addr))) |
79 |
goto ok; |
80 |
} |
81 |
if (i < block_size) |
82 |
break; |
83 |
} |
84 |
if (i == block_size) { |
85 |
ptr = ccs_alloc_element(sizeof(*ptr)); |
86 |
if (!ptr) |
87 |
goto ok; |
88 |
list1_add_tail_mb(&ptr->list, &address_list); |
89 |
i = 0; |
90 |
} |
91 |
ptr->addr[ptr->in_use_count++] = *addr; |
92 |
ok: |
93 |
mutex_unlock(&lock); |
94 |
return ptr ? &ptr->addr[i] : NULL; |
95 |
} |
96 |
|
97 |
/* The list for "struct address_group_entry". */ |
98 |
static LIST1_HEAD(address_group_list); |
99 |
|
100 |
/** |
101 |
* update_address_group_entry - Update "struct address_group_entry" list. |
102 |
* |
103 |
* @group_name: The name of address group. |
104 |
* @is_ipv6: True if @min_address and @max_address are IPv6 addresses. |
105 |
* @min_address: Start of IPv4 or IPv6 address range. |
106 |
* @max_address: End of IPv4 or IPv6 address range. |
107 |
* @is_delete: True if it is a delete request. |
108 |
* |
109 |
* Returns 0 on success, negative value otherwise. |
110 |
*/ |
111 |
static int update_address_group_entry(const char *group_name, |
112 |
const bool is_ipv6, |
113 |
const u16 *min_address, |
114 |
const u16 *max_address, |
115 |
const bool is_delete) |
116 |
{ |
117 |
static DEFINE_MUTEX(lock); |
118 |
struct address_group_entry *new_group; |
119 |
struct address_group_entry *group; |
120 |
struct address_group_member *new_member; |
121 |
struct address_group_member *member; |
122 |
const struct path_info *saved_group_name; |
123 |
const struct in6_addr *saved_min_address = NULL; |
124 |
const struct in6_addr *saved_max_address = NULL; |
125 |
int error = -ENOMEM; |
126 |
bool found = false; |
127 |
if (!ccs_is_correct_path(group_name, 0, 0, 0, __func__) || |
128 |
!group_name[0]) |
129 |
return -EINVAL; |
130 |
saved_group_name = ccs_save_name(group_name); |
131 |
if (!saved_group_name) |
132 |
return -ENOMEM; |
133 |
if (!is_ipv6) |
134 |
goto not_ipv6; |
135 |
saved_min_address |
136 |
= save_ipv6_address((struct in6_addr *) min_address); |
137 |
saved_max_address |
138 |
= save_ipv6_address((struct in6_addr *) max_address); |
139 |
if (!saved_min_address || !saved_max_address) |
140 |
return -ENOMEM; |
141 |
not_ipv6: |
142 |
mutex_lock(&lock); |
143 |
list1_for_each_entry(group, &address_group_list, list) { |
144 |
if (saved_group_name != group->group_name) |
145 |
continue; |
146 |
list1_for_each_entry(member, &group->address_group_member_list, |
147 |
list) { |
148 |
if (member->is_ipv6 != is_ipv6) |
149 |
continue; |
150 |
if (is_ipv6) { |
151 |
if (member->min.ipv6 != saved_min_address || |
152 |
member->max.ipv6 != saved_max_address) |
153 |
continue; |
154 |
} else { |
155 |
if (member->min.ipv4 != *(u32 *) min_address || |
156 |
member->max.ipv4 != *(u32 *) max_address) |
157 |
continue; |
158 |
} |
159 |
member->is_deleted = is_delete; |
160 |
error = 0; |
161 |
goto out; |
162 |
} |
163 |
found = true; |
164 |
break; |
165 |
} |
166 |
if (is_delete) { |
167 |
error = -ENOENT; |
168 |
goto out; |
169 |
} |
170 |
if (!found) { |
171 |
new_group = ccs_alloc_element(sizeof(*new_group)); |
172 |
if (!new_group) |
173 |
goto out; |
174 |
INIT_LIST1_HEAD(&new_group->address_group_member_list); |
175 |
new_group->group_name = saved_group_name; |
176 |
list1_add_tail_mb(&new_group->list, &address_group_list); |
177 |
group = new_group; |
178 |
} |
179 |
new_member = ccs_alloc_element(sizeof(*new_member)); |
180 |
if (!new_member) |
181 |
goto out; |
182 |
new_member->is_ipv6 = is_ipv6; |
183 |
if (is_ipv6) { |
184 |
new_member->min.ipv6 = saved_min_address; |
185 |
new_member->max.ipv6 = saved_max_address; |
186 |
} else { |
187 |
new_member->min.ipv4 = *(u32 *) min_address; |
188 |
new_member->max.ipv4 = *(u32 *) max_address; |
189 |
} |
190 |
list1_add_tail_mb(&new_member->list, &group->address_group_member_list); |
191 |
error = 0; |
192 |
out: |
193 |
mutex_unlock(&lock); |
194 |
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
195 |
return error; |
196 |
} |
197 |
|
198 |
/** |
199 |
* ccs_write_address_group_policy - Write "struct address_group_entry" list. |
200 |
* |
201 |
* @data: String to parse. |
202 |
* @is_delete: True if it is a delete request. |
203 |
* |
204 |
* Returns 0 on success, negative value otherwise. |
205 |
*/ |
206 |
int ccs_write_address_group_policy(char *data, const bool is_delete) |
207 |
{ |
208 |
u8 count; |
209 |
bool is_ipv6; |
210 |
u16 min_address[8]; |
211 |
u16 max_address[8]; |
212 |
char *cp = strchr(data, ' '); |
213 |
if (!cp) |
214 |
return -EINVAL; |
215 |
*cp++ = '\0'; |
216 |
count = sscanf(cp, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
217 |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
218 |
&min_address[0], &min_address[1], |
219 |
&min_address[2], &min_address[3], |
220 |
&min_address[4], &min_address[5], |
221 |
&min_address[6], &min_address[7], |
222 |
&max_address[0], &max_address[1], |
223 |
&max_address[2], &max_address[3], |
224 |
&max_address[4], &max_address[5], |
225 |
&max_address[6], &max_address[7]); |
226 |
if (count == 8 || count == 16) { |
227 |
u8 i; |
228 |
for (i = 0; i < 8; i++) { |
229 |
min_address[i] = htons(min_address[i]); |
230 |
max_address[i] = htons(max_address[i]); |
231 |
} |
232 |
if (count == 8) |
233 |
memmove(max_address, min_address, sizeof(min_address)); |
234 |
is_ipv6 = true; |
235 |
goto ok; |
236 |
} |
237 |
count = sscanf(cp, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
238 |
&min_address[0], &min_address[1], |
239 |
&min_address[2], &min_address[3], |
240 |
&max_address[0], &max_address[1], |
241 |
&max_address[2], &max_address[3]); |
242 |
if (count == 4 || count == 8) { |
243 |
u32 ip = ((((u8) min_address[0]) << 24) |
244 |
+ (((u8) min_address[1]) << 16) |
245 |
+ (((u8) min_address[2]) << 8) |
246 |
+ (u8) min_address[3]); |
247 |
*(u32 *) min_address = ip; |
248 |
if (count == 8) |
249 |
ip = ((((u8) max_address[0]) << 24) |
250 |
+ (((u8) max_address[1]) << 16) |
251 |
+ (((u8) max_address[2]) << 8) |
252 |
+ (u8) max_address[3]); |
253 |
*(u32 *) max_address = ip; |
254 |
is_ipv6 = false; |
255 |
goto ok; |
256 |
} |
257 |
return -EINVAL; |
258 |
ok: |
259 |
return update_address_group_entry(data, is_ipv6, |
260 |
min_address, max_address, is_delete); |
261 |
} |
262 |
|
263 |
/** |
264 |
* find_or_assign_new_address_group - Create address group. |
265 |
* |
266 |
* @group_name: The name of address group. |
267 |
* |
268 |
* Returns pointer to "struct address_group_entry" on success, NULL otherwise. |
269 |
*/ |
270 |
static struct address_group_entry * |
271 |
find_or_assign_new_address_group(const char *group_name) |
272 |
{ |
273 |
u8 i; |
274 |
struct address_group_entry *group; |
275 |
for (i = 0; i <= 1; i++) { |
276 |
list1_for_each_entry(group, &address_group_list, list) { |
277 |
if (!strcmp(group_name, group->group_name->name)) |
278 |
return group; |
279 |
} |
280 |
if (!i) { |
281 |
const u16 dummy[2] = { 0, 0 }; |
282 |
update_address_group_entry(group_name, false, |
283 |
dummy, dummy, false); |
284 |
update_address_group_entry(group_name, false, |
285 |
dummy, dummy, true); |
286 |
} |
287 |
} |
288 |
return NULL; |
289 |
} |
290 |
|
291 |
/** |
292 |
* address_matches_to_group - Check whether the given address matches members of the given address group. |
293 |
* |
294 |
* @is_ipv6: True if @address is an IPv6 address. |
295 |
* @address: An IPv4 or IPv6 address. |
296 |
* @group: Pointer to "struct address_group_entry". |
297 |
* |
298 |
* Returns true if @address matches addresses in @group group, false otherwise. |
299 |
*/ |
300 |
static bool address_matches_to_group(const bool is_ipv6, const u32 *address, |
301 |
const struct address_group_entry *group) |
302 |
{ |
303 |
struct address_group_member *member; |
304 |
const u32 ip = ntohl(*address); |
305 |
list1_for_each_entry(member, &group->address_group_member_list, list) { |
306 |
if (member->is_deleted) |
307 |
continue; |
308 |
if (member->is_ipv6) { |
309 |
if (is_ipv6 && |
310 |
memcmp(member->min.ipv6, address, 16) <= 0 && |
311 |
memcmp(address, member->max.ipv6, 16) <= 0) |
312 |
return true; |
313 |
} else { |
314 |
if (!is_ipv6 && |
315 |
member->min.ipv4 <= ip && ip <= member->max.ipv4) |
316 |
return true; |
317 |
} |
318 |
} |
319 |
return false; |
320 |
} |
321 |
|
322 |
/** |
323 |
* ccs_read_address_group_policy - Read "struct address_group_entry" list. |
324 |
* |
325 |
* @head: Pointer to "struct ccs_io_buffer". |
326 |
* |
327 |
* Returns true on success, false otherwise. |
328 |
*/ |
329 |
bool ccs_read_address_group_policy(struct ccs_io_buffer *head) |
330 |
{ |
331 |
struct list1_head *gpos; |
332 |
struct list1_head *mpos; |
333 |
list1_for_each_cookie(gpos, head->read_var1, &address_group_list) { |
334 |
struct address_group_entry *group; |
335 |
group = list1_entry(gpos, struct address_group_entry, list); |
336 |
list1_for_each_cookie(mpos, head->read_var2, |
337 |
&group->address_group_member_list) { |
338 |
char buf[128]; |
339 |
struct address_group_member *member; |
340 |
member = list1_entry(mpos, struct address_group_member, |
341 |
list); |
342 |
if (member->is_deleted) |
343 |
continue; |
344 |
if (member->is_ipv6) { |
345 |
const struct in6_addr *min_address |
346 |
= member->min.ipv6; |
347 |
const struct in6_addr *max_address |
348 |
= member->max.ipv6; |
349 |
ccs_print_ipv6(buf, sizeof(buf), min_address); |
350 |
if (min_address != max_address) { |
351 |
int len; |
352 |
char *cp = strchr(buf, '\0'); |
353 |
*cp++ = '-'; |
354 |
len = strlen(buf); |
355 |
ccs_print_ipv6(cp, sizeof(buf) - len, |
356 |
max_address); |
357 |
} |
358 |
} else { |
359 |
const u32 min_address = member->min.ipv4; |
360 |
const u32 max_address = member->max.ipv4; |
361 |
memset(buf, 0, sizeof(buf)); |
362 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", |
363 |
HIPQUAD(min_address)); |
364 |
if (min_address != max_address) { |
365 |
const int len = strlen(buf); |
366 |
snprintf(buf + len, |
367 |
sizeof(buf) - 1 - len, |
368 |
"-%u.%u.%u.%u", |
369 |
HIPQUAD(max_address)); |
370 |
} |
371 |
} |
372 |
if (!ccs_io_printf(head, KEYWORD_ADDRESS_GROUP |
373 |
"%s %s\n", group->group_name->name, |
374 |
buf)) |
375 |
goto out; |
376 |
} |
377 |
} |
378 |
return true; |
379 |
out: |
380 |
return false; |
381 |
} |
382 |
|
383 |
#if !defined(NIP6) |
384 |
#define NIP6(addr) \ |
385 |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
386 |
ntohs((addr).s6_addr16[2]), ntohs((addr).s6_addr16[3]), \ |
387 |
ntohs((addr).s6_addr16[4]), ntohs((addr).s6_addr16[5]), \ |
388 |
ntohs((addr).s6_addr16[6]), ntohs((addr).s6_addr16[7]) |
389 |
#endif |
390 |
|
391 |
/** |
392 |
* ccs_print_ipv6 - Print an IPv6 address. |
393 |
* |
394 |
* @buffer: Buffer to write to. |
395 |
* @buffer_len: Size of @buffer. |
396 |
* @ip: Pointer to "struct in6_addr". |
397 |
* |
398 |
* Returns nothing. |
399 |
*/ |
400 |
void ccs_print_ipv6(char *buffer, const int buffer_len, |
401 |
const struct in6_addr *ip) |
402 |
{ |
403 |
memset(buffer, 0, buffer_len); |
404 |
snprintf(buffer, buffer_len - 1, "%x:%x:%x:%x:%x:%x:%x:%x", NIP6(*ip)); |
405 |
} |
406 |
|
407 |
/** |
408 |
* ccs_net2keyword - Convert network operation index to network operation name. |
409 |
* |
410 |
* @operation: Type of operation. |
411 |
* |
412 |
* Returns the name of operation. |
413 |
*/ |
414 |
const char *ccs_net2keyword(const u8 operation) |
415 |
{ |
416 |
const char *keyword = "unknown"; |
417 |
switch (operation) { |
418 |
case NETWORK_ACL_UDP_BIND: |
419 |
keyword = "UDP bind"; |
420 |
break; |
421 |
case NETWORK_ACL_UDP_CONNECT: |
422 |
keyword = "UDP connect"; |
423 |
break; |
424 |
case NETWORK_ACL_TCP_BIND: |
425 |
keyword = "TCP bind"; |
426 |
break; |
427 |
case NETWORK_ACL_TCP_LISTEN: |
428 |
keyword = "TCP listen"; |
429 |
break; |
430 |
case NETWORK_ACL_TCP_CONNECT: |
431 |
keyword = "TCP connect"; |
432 |
break; |
433 |
case NETWORK_ACL_TCP_ACCEPT: |
434 |
keyword = "TCP accept"; |
435 |
break; |
436 |
case NETWORK_ACL_RAW_BIND: |
437 |
keyword = "RAW bind"; |
438 |
break; |
439 |
case NETWORK_ACL_RAW_CONNECT: |
440 |
keyword = "RAW connect"; |
441 |
break; |
442 |
} |
443 |
return keyword; |
444 |
} |
445 |
|
446 |
/** |
447 |
* update_network_entry - Update "struct ip_network_acl_record" list. |
448 |
* |
449 |
* @operation: Type of operation. |
450 |
* @record_type: Type of address. |
451 |
* @group: Pointer to "struct address_group_entry". May be NULL. |
452 |
* @min_address: Start of IPv4 or IPv6 address range. |
453 |
* @max_address: End of IPv4 or IPv6 address range. |
454 |
* @min_port: Start of port number range. |
455 |
* @max_port: End of port number range. |
456 |
* @domain: Pointer to "struct domain_info". |
457 |
* @condition: Pointer to "struct condition_list". May be NULL. |
458 |
* @is_delete: True if it is a delete request. |
459 |
* |
460 |
* Returns 0 on success, negative value otherwise. |
461 |
*/ |
462 |
static int update_network_entry(const u8 operation, const u8 record_type, |
463 |
const struct address_group_entry *group, |
464 |
const u32 *min_address, const u32 *max_address, |
465 |
const u16 min_port, const u16 max_port, |
466 |
struct domain_info *domain, |
467 |
const struct condition_list *condition, |
468 |
const bool is_delete) |
469 |
{ |
470 |
struct acl_info *ptr; |
471 |
struct ip_network_acl_record *acl; |
472 |
int error = -ENOMEM; |
473 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
474 |
const u32 min_ip = ntohl(*min_address); |
475 |
const u32 max_ip = ntohl(*max_address); |
476 |
const struct in6_addr *saved_min_address = NULL; |
477 |
const struct in6_addr *saved_max_address = NULL; |
478 |
if (!domain) |
479 |
return -EINVAL; |
480 |
if (record_type != IP_RECORD_TYPE_IPv6) |
481 |
goto not_ipv6; |
482 |
saved_min_address = save_ipv6_address((struct in6_addr *) min_address); |
483 |
saved_max_address = save_ipv6_address((struct in6_addr *) max_address); |
484 |
if (!saved_min_address || !saved_max_address) |
485 |
return -ENOMEM; |
486 |
not_ipv6: |
487 |
mutex_lock(&domain_acl_lock); |
488 |
if (is_delete) |
489 |
goto delete; |
490 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
491 |
if (ccs_acl_type1(ptr) != TYPE_IP_NETWORK_ACL) |
492 |
continue; |
493 |
if (ccs_get_condition_part(ptr) != condition) |
494 |
continue; |
495 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
496 |
if (acl->operation_type != operation || |
497 |
acl->record_type != record_type || |
498 |
acl->min_port != min_port || max_port != acl->max_port) |
499 |
continue; |
500 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
501 |
if (acl->u.group != group) |
502 |
continue; |
503 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
504 |
if (acl->u.ipv4.min != min_ip || |
505 |
max_ip != acl->u.ipv4.max) |
506 |
continue; |
507 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
508 |
if (acl->u.ipv6.min != saved_min_address || |
509 |
saved_max_address != acl->u.ipv6.max) |
510 |
continue; |
511 |
} |
512 |
error = ccs_add_domain_acl(NULL, ptr); |
513 |
goto out; |
514 |
} |
515 |
/* Not found. Append it to the tail. */ |
516 |
acl = ccs_alloc_acl_element(TYPE_IP_NETWORK_ACL, condition); |
517 |
if (!acl) |
518 |
goto out; |
519 |
acl->operation_type = operation; |
520 |
acl->record_type = record_type; |
521 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
522 |
acl->u.group = group; |
523 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
524 |
acl->u.ipv4.min = min_ip; |
525 |
acl->u.ipv4.max = max_ip; |
526 |
} else { |
527 |
acl->u.ipv6.min = saved_min_address; |
528 |
acl->u.ipv6.max = saved_max_address; |
529 |
} |
530 |
acl->min_port = min_port; |
531 |
acl->max_port = max_port; |
532 |
error = ccs_add_domain_acl(domain, &acl->head); |
533 |
goto out; |
534 |
delete: |
535 |
error = -ENOENT; |
536 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
537 |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
538 |
continue; |
539 |
if (ccs_get_condition_part(ptr) != condition) |
540 |
continue; |
541 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
542 |
if (acl->operation_type != operation || |
543 |
acl->record_type != record_type || |
544 |
acl->min_port != min_port || max_port != acl->max_port) |
545 |
continue; |
546 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
547 |
if (acl->u.group != group) |
548 |
continue; |
549 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
550 |
if (acl->u.ipv4.min != min_ip || |
551 |
max_ip != acl->u.ipv4.max) |
552 |
continue; |
553 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
554 |
if (acl->u.ipv6.min != saved_min_address || |
555 |
saved_max_address != acl->u.ipv6.max) |
556 |
continue; |
557 |
} |
558 |
error = ccs_del_domain_acl(ptr); |
559 |
break; |
560 |
} |
561 |
out: |
562 |
mutex_unlock(&domain_acl_lock); |
563 |
return error; |
564 |
} |
565 |
|
566 |
/** |
567 |
* check_network_entry - Check permission for network operation. |
568 |
* |
569 |
* @is_ipv6: True if @address is an IPv6 address. |
570 |
* @operation: Type of operation. |
571 |
* @address: An IPv4 or IPv6 address. |
572 |
* @port: Port number. |
573 |
* |
574 |
* Returns 0 on success, negative value otherwise. |
575 |
*/ |
576 |
static int check_network_entry(const bool is_ipv6, const u8 operation, |
577 |
const u32 *address, const u16 port) |
578 |
{ |
579 |
struct domain_info * const domain = current->domain_info; |
580 |
struct acl_info *ptr; |
581 |
const char *keyword = ccs_net2keyword(operation); |
582 |
const u8 profile = current->domain_info->profile; |
583 |
const u8 mode = ccs_check_flags(CCS_TOMOYO_MAC_FOR_NETWORK); |
584 |
const bool is_enforce = (mode == 3); |
585 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
586 |
const u32 ip = ntohl(*address); |
587 |
bool found = false; |
588 |
char buf[64]; |
589 |
if (!mode) |
590 |
return 0; |
591 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
592 |
struct ip_network_acl_record *acl; |
593 |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
594 |
continue; |
595 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
596 |
if (acl->operation_type != operation || port < acl->min_port || |
597 |
acl->max_port < port || !ccs_check_condition(ptr, NULL)) |
598 |
continue; |
599 |
if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
600 |
if (!address_matches_to_group(is_ipv6, address, |
601 |
acl->u.group)) |
602 |
continue; |
603 |
} else if (acl->record_type == IP_RECORD_TYPE_IPv4) { |
604 |
if (is_ipv6 || |
605 |
ip < acl->u.ipv4.min || acl->u.ipv4.max < ip) |
606 |
continue; |
607 |
} else { |
608 |
if (!is_ipv6 || |
609 |
memcmp(acl->u.ipv6.min, address, 16) > 0 || |
610 |
memcmp(address, acl->u.ipv6.max, 16) > 0) |
611 |
continue; |
612 |
} |
613 |
ccs_update_condition(ptr); |
614 |
found = true; |
615 |
break; |
616 |
} |
617 |
memset(buf, 0, sizeof(buf)); |
618 |
if (is_ipv6) |
619 |
ccs_print_ipv6(buf, sizeof(buf), |
620 |
(const struct in6_addr *) address); |
621 |
else |
622 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
623 |
audit_network_log(is_ipv6, keyword, buf, port, found, profile, mode); |
624 |
if (found) |
625 |
return 0; |
626 |
if (ccs_verbose_mode()) |
627 |
printk(KERN_WARNING "TOMOYO-%s: %s to %s %u denied for %s\n", |
628 |
ccs_get_msg(is_enforce), keyword, buf, port, |
629 |
ccs_get_last_name(domain)); |
630 |
if (is_enforce) |
631 |
return ccs_check_supervisor("%s\n" KEYWORD_ALLOW_NETWORK "%s " |
632 |
"%s %u\n", domain->domainname->name, |
633 |
keyword, buf, port); |
634 |
if (mode == 1 && ccs_check_domain_quota(domain)) |
635 |
update_network_entry(operation, is_ipv6 ? |
636 |
IP_RECORD_TYPE_IPv6 : IP_RECORD_TYPE_IPv4, |
637 |
NULL, address, address, port, port, domain, |
638 |
NULL, 0); |
639 |
return 0; |
640 |
} |
641 |
|
642 |
/** |
643 |
* ccs_write_network_policy - Write "struct ip_network_acl_record" list. |
644 |
* |
645 |
* @data: String to parse. |
646 |
* @domain: Pointer to "struct domain_info". |
647 |
* @condition: Pointer to "struct condition_list". May be NULL. |
648 |
* @is_delete: True if it is a delete request. |
649 |
* |
650 |
* Returns 0 on success, negative value otherwise. |
651 |
*/ |
652 |
int ccs_write_network_policy(char *data, struct domain_info *domain, |
653 |
const struct condition_list *condition, |
654 |
const bool is_delete) |
655 |
{ |
656 |
u8 sock_type; |
657 |
u8 operation; |
658 |
u8 record_type; |
659 |
u16 min_address[8]; |
660 |
u16 max_address[8]; |
661 |
struct address_group_entry *group = NULL; |
662 |
u16 min_port; |
663 |
u16 max_port; |
664 |
u8 count; |
665 |
char *cp1 = strchr(data, ' '); |
666 |
char *cp2; |
667 |
if (!cp1) |
668 |
goto out; |
669 |
cp1++; |
670 |
if (!strncmp(data, "TCP ", 4)) |
671 |
sock_type = SOCK_STREAM; |
672 |
else if (!strncmp(data, "UDP ", 4)) |
673 |
sock_type = SOCK_DGRAM; |
674 |
else if (!strncmp(data, "RAW ", 4)) |
675 |
sock_type = SOCK_RAW; |
676 |
else |
677 |
goto out; |
678 |
cp2 = strchr(cp1, ' '); |
679 |
if (!cp2) |
680 |
goto out; |
681 |
cp2++; |
682 |
if (!strncmp(cp1, "bind ", 5)) |
683 |
switch (sock_type) { |
684 |
case SOCK_STREAM: |
685 |
operation = NETWORK_ACL_TCP_BIND; |
686 |
break; |
687 |
case SOCK_DGRAM: |
688 |
operation = NETWORK_ACL_UDP_BIND; |
689 |
break; |
690 |
default: |
691 |
operation = NETWORK_ACL_RAW_BIND; |
692 |
} |
693 |
else if (!strncmp(cp1, "connect ", 8)) |
694 |
switch (sock_type) { |
695 |
case SOCK_STREAM: |
696 |
operation = NETWORK_ACL_TCP_CONNECT; |
697 |
break; |
698 |
case SOCK_DGRAM: |
699 |
operation = NETWORK_ACL_UDP_CONNECT; |
700 |
break; |
701 |
default: |
702 |
operation = NETWORK_ACL_RAW_CONNECT; |
703 |
} |
704 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "listen ", 7)) |
705 |
operation = NETWORK_ACL_TCP_LISTEN; |
706 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "accept ", 7)) |
707 |
operation = NETWORK_ACL_TCP_ACCEPT; |
708 |
else |
709 |
goto out; |
710 |
cp1 = strchr(cp2, ' '); |
711 |
if (!cp1) |
712 |
goto out; |
713 |
*cp1++ = '\0'; |
714 |
count = sscanf(cp2, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
715 |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
716 |
&min_address[0], &min_address[1], |
717 |
&min_address[2], &min_address[3], |
718 |
&min_address[4], &min_address[5], |
719 |
&min_address[6], &min_address[7], |
720 |
&max_address[0], &max_address[1], |
721 |
&max_address[2], &max_address[3], |
722 |
&max_address[4], &max_address[5], |
723 |
&max_address[6], &max_address[7]); |
724 |
if (count == 8 || count == 16) { |
725 |
u8 i; |
726 |
for (i = 0; i < 8; i++) { |
727 |
min_address[i] = htons(min_address[i]); |
728 |
max_address[i] = htons(max_address[i]); |
729 |
} |
730 |
if (count == 8) |
731 |
memmove(max_address, min_address, sizeof(min_address)); |
732 |
record_type = IP_RECORD_TYPE_IPv6; |
733 |
goto ok; |
734 |
} |
735 |
count = sscanf(cp2, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
736 |
&min_address[0], &min_address[1], |
737 |
&min_address[2], &min_address[3], |
738 |
&max_address[0], &max_address[1], |
739 |
&max_address[2], &max_address[3]); |
740 |
if (count == 4 || count == 8) { |
741 |
u32 ip = htonl((((u8) min_address[0]) << 24) |
742 |
+ (((u8) min_address[1]) << 16) |
743 |
+ (((u8) min_address[2]) << 8) |
744 |
+ (u8) min_address[3]); |
745 |
*(u32 *) min_address = ip; |
746 |
if (count == 8) |
747 |
ip = htonl((((u8) max_address[0]) << 24) |
748 |
+ (((u8) max_address[1]) << 16) |
749 |
+ (((u8) max_address[2]) << 8) |
750 |
+ (u8) max_address[3]); |
751 |
*(u32 *) max_address = ip; |
752 |
record_type = IP_RECORD_TYPE_IPv4; |
753 |
goto ok; |
754 |
} |
755 |
if (*cp2 == '@') { |
756 |
group = find_or_assign_new_address_group(cp2 + 1); |
757 |
if (!group) |
758 |
return -ENOMEM; |
759 |
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
760 |
goto ok; |
761 |
} |
762 |
out: |
763 |
return -EINVAL; |
764 |
ok: |
765 |
if (strchr(cp1, ' ')) |
766 |
goto out; |
767 |
count = sscanf(cp1, "%hu-%hu", &min_port, &max_port); |
768 |
if (count != 1 && count != 2) |
769 |
goto out; |
770 |
if (count == 1) |
771 |
max_port = min_port; |
772 |
return update_network_entry(operation, record_type, group, |
773 |
(u32 *) min_address, (u32 *) max_address, |
774 |
min_port, max_port, domain, condition, |
775 |
is_delete); |
776 |
} |
777 |
|
778 |
/** |
779 |
* ccs_check_network_listen_acl - Check permission for listen() operation. |
780 |
* |
781 |
* @is_ipv6: True if @address is an IPv6 address. |
782 |
* @address: An IPv4 or IPv6 address. |
783 |
* @port: Port number. |
784 |
* |
785 |
* Returns 0 on success, negative value otherwise. |
786 |
*/ |
787 |
int ccs_check_network_listen_acl(const _Bool is_ipv6, const u8 *address, |
788 |
const u16 port) |
789 |
{ |
790 |
return check_network_entry(is_ipv6, NETWORK_ACL_TCP_LISTEN, |
791 |
(const u32 *) address, ntohs(port)); |
792 |
} |
793 |
|
794 |
/** |
795 |
* ccs_check_network_connect_acl - Check permission for connect() operation. |
796 |
* |
797 |
* @is_ipv6: True if @address is an IPv6 address. |
798 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
799 |
* @address: An IPv4 or IPv6 address. |
800 |
* @port: Port number. |
801 |
* |
802 |
* Returns 0 on success, negative value otherwise. |
803 |
*/ |
804 |
int ccs_check_network_connect_acl(const _Bool is_ipv6, const int sock_type, |
805 |
const u8 *address, const u16 port) |
806 |
{ |
807 |
u8 operation; |
808 |
switch (sock_type) { |
809 |
case SOCK_STREAM: |
810 |
operation = NETWORK_ACL_TCP_CONNECT; |
811 |
break; |
812 |
case SOCK_DGRAM: |
813 |
operation = NETWORK_ACL_UDP_CONNECT; |
814 |
break; |
815 |
default: |
816 |
operation = NETWORK_ACL_RAW_CONNECT; |
817 |
} |
818 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
819 |
ntohs(port)); |
820 |
} |
821 |
|
822 |
/** |
823 |
* ccs_check_network_bind_acl - Check permission for bind() operation. |
824 |
* |
825 |
* @is_ipv6: True if @address is an IPv6 address. |
826 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
827 |
* @address: An IPv4 or IPv6 address. |
828 |
* @port: Port number. |
829 |
* |
830 |
* Returns 0 on success, negative value otherwise. |
831 |
*/ |
832 |
int ccs_check_network_bind_acl(const _Bool is_ipv6, const int sock_type, |
833 |
const u8 *address, const u16 port) |
834 |
{ |
835 |
u8 operation; |
836 |
switch (sock_type) { |
837 |
case SOCK_STREAM: |
838 |
operation = NETWORK_ACL_TCP_BIND; |
839 |
break; |
840 |
case SOCK_DGRAM: |
841 |
operation = NETWORK_ACL_UDP_BIND; |
842 |
break; |
843 |
default: |
844 |
operation = NETWORK_ACL_RAW_BIND; |
845 |
} |
846 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
847 |
ntohs(port)); |
848 |
} |
849 |
|
850 |
/** |
851 |
* ccs_check_network_accept_acl - Check permission for accept() operation. |
852 |
* |
853 |
* @is_ipv6: True if @address is an IPv6 address. |
854 |
* @address: An IPv4 or IPv6 address. |
855 |
* @port: Port number. |
856 |
* |
857 |
* Returns 0 on success, negative value otherwise. |
858 |
*/ |
859 |
int ccs_check_network_accept_acl(const _Bool is_ipv6, const u8 *address, |
860 |
const u16 port) |
861 |
{ |
862 |
int retval; |
863 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
864 |
retval = check_network_entry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, |
865 |
(const u32 *) address, ntohs(port)); |
866 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
867 |
return retval; |
868 |
} |
869 |
|
870 |
/** |
871 |
* ccs_check_network_sendmsg_acl - Check permission for sendmsg() operation. |
872 |
* |
873 |
* @is_ipv6: True if @address is an IPv6 address. |
874 |
* @sock_type: Type of socket. (UDP or RAW) |
875 |
* @address: An IPv4 or IPv6 address. |
876 |
* @port: Port number. |
877 |
* |
878 |
* Returns 0 on success, negative value otherwise. |
879 |
*/ |
880 |
int ccs_check_network_sendmsg_acl(const _Bool is_ipv6, const int sock_type, |
881 |
const u8 *address, const u16 port) |
882 |
{ |
883 |
u8 operation; |
884 |
if (sock_type == SOCK_DGRAM) |
885 |
operation = NETWORK_ACL_UDP_CONNECT; |
886 |
else |
887 |
operation = NETWORK_ACL_RAW_CONNECT; |
888 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
889 |
ntohs(port)); |
890 |
} |
891 |
|
892 |
/** |
893 |
* ccs_check_network_recvmsg_acl - Check permission for recvmsg() operation. |
894 |
* |
895 |
* @is_ipv6: True if @address is an IPv6 address. |
896 |
* @sock_type: Type of socket. (UDP or RAW) |
897 |
* @address: An IPv4 or IPv6 address. |
898 |
* @port: Port number. |
899 |
* |
900 |
* Returns 0 on success, negative value otherwise. |
901 |
*/ |
902 |
int ccs_check_network_recvmsg_acl(const _Bool is_ipv6, const int sock_type, |
903 |
const u8 *address, const u16 port) |
904 |
{ |
905 |
int retval; |
906 |
const u8 operation |
907 |
= (sock_type == SOCK_DGRAM) ? |
908 |
NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
909 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
910 |
retval = check_network_entry(is_ipv6, operation, (const u32 *) address, |
911 |
ntohs(port)); |
912 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
913 |
return retval; |
914 |
} |