1 |
/* |
/* |
2 |
* security/ccsecurity/network.c |
* security/ccsecurity/network.c |
3 |
* |
* |
4 |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
* Copyright (C) 2005-2010 NTT DATA CORPORATION |
5 |
* |
* |
6 |
* Version: 1.7.0-pre 2009/08/08 |
* Version: 1.7.2-pre 2010/03/08 |
7 |
* |
* |
8 |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
9 |
* See README.ccs for ChangeLog. |
* See README.ccs for ChangeLog. |
34 |
const char *operation, const char *address, |
const char *operation, const char *address, |
35 |
const u16 port, const bool is_granted) |
const u16 port, const bool is_granted) |
36 |
{ |
{ |
37 |
if (!is_granted && ccs_verbose_mode(r->domain)) |
if (!is_granted) |
38 |
printk(KERN_WARNING "%s: %s to %s %u denied for %s\n", |
ccs_warn_log(r, "%s %s %u", operation, address, port); |
|
ccs_get_msg(r->mode == 3), operation, address, port, |
|
|
ccs_get_last_name(r->domain)); |
|
39 |
return ccs_write_audit_log(is_granted, r, CCS_KEYWORD_ALLOW_NETWORK |
return ccs_write_audit_log(is_granted, r, CCS_KEYWORD_ALLOW_NETWORK |
40 |
"%s %s %u\n", operation, address, port); |
"%s %s %u\n", operation, address, port); |
41 |
} |
} |
84 |
} |
} |
85 |
|
|
86 |
#if !defined(NIP6) |
#if !defined(NIP6) |
87 |
#define NIP6(addr) \ |
#define NIP6(addr) \ |
88 |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
89 |
ntohs((addr).s6_addr16[2]), ntohs((addr).s6_addr16[3]), \ |
ntohs((addr).s6_addr16[2]), ntohs((addr).s6_addr16[3]), \ |
90 |
ntohs((addr).s6_addr16[4]), ntohs((addr).s6_addr16[5]), \ |
ntohs((addr).s6_addr16[4]), ntohs((addr).s6_addr16[5]), \ |
91 |
ntohs((addr).s6_addr16[6]), ntohs((addr).s6_addr16[7]) |
ntohs((addr).s6_addr16[6]), ntohs((addr).s6_addr16[7]) |
92 |
#endif |
#endif |
93 |
|
|
94 |
/** |
/** |
147 |
} |
} |
148 |
|
|
149 |
/** |
/** |
150 |
* ccs_check_network_entry2 - Check permission for network operation. |
* ccs_network_entry2 - Check permission for network operation. |
151 |
* |
* |
152 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
153 |
* @operation: Type of operation. |
* @operation: Type of operation. |
158 |
* |
* |
159 |
* Caller holds ccs_read_lock(). |
* Caller holds ccs_read_lock(). |
160 |
*/ |
*/ |
161 |
static int ccs_check_network_entry2(const bool is_ipv6, const u8 operation, |
static int ccs_network_entry2(const bool is_ipv6, const u8 operation, |
162 |
const u32 *address, const u16 port) |
const u32 *address, const u16 port) |
163 |
{ |
{ |
164 |
struct ccs_request_info r; |
struct ccs_request_info r; |
165 |
struct ccs_acl_info *ptr; |
struct ccs_acl_info *ptr; |
166 |
const char *keyword = ccs_net2keyword(operation); |
const char *keyword = ccs_net2keyword(operation); |
|
bool is_enforce; |
|
167 |
const u16 perm = 1 << operation; |
const u16 perm = 1 << operation; |
168 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
/* using host byte order to allow u32 comparison than memcmp().*/ |
169 |
const u32 ip = ntohl(*address); |
const u32 ip = ntohl(*address); |
170 |
int error; |
int error; |
171 |
char buf[64]; |
char buf[64]; |
172 |
ccs_check_read_lock(); |
if (ccs_init_request_info(&r, NULL, |
173 |
if (!ccs_can_sleep() || |
CCS_MAC_NETWORK_UDP_BIND + operation) |
174 |
!ccs_init_request_info(&r, NULL, CCS_MAC_NETWORK)) |
== CCS_CONFIG_DISABLED) |
175 |
return 0; |
return 0; |
|
is_enforce = (r.mode == 3); |
|
|
retry: |
|
|
error = -EPERM; |
|
|
list_for_each_entry_rcu(ptr, &r.domain->acl_info_list, list) { |
|
|
struct ccs_ip_network_acl *acl; |
|
|
if (ptr->is_deleted || ptr->type != CCS_TYPE_IP_NETWORK_ACL) |
|
|
continue; |
|
|
acl = container_of(ptr, struct ccs_ip_network_acl, head); |
|
|
if (!(acl->perm & perm)) |
|
|
continue; |
|
|
if (!ccs_compare_number_union(port, &acl->port) || |
|
|
!ccs_check_condition(&r, ptr)) |
|
|
continue; |
|
|
if (acl->address_type == CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP) { |
|
|
if (!ccs_address_matches_group(is_ipv6, address, |
|
|
acl->address.group)) |
|
|
continue; |
|
|
} else if (acl->address_type == CCS_IP_ADDRESS_TYPE_IPv4) { |
|
|
if (is_ipv6 || |
|
|
ip < acl->address.ipv4.min || |
|
|
acl->address.ipv4.max < ip) |
|
|
continue; |
|
|
} else { |
|
|
if (!is_ipv6 || |
|
|
memcmp(acl->address.ipv6.min, address, 16) > 0 || |
|
|
memcmp(address, acl->address.ipv6.max, 16) > 0) |
|
|
continue; |
|
|
} |
|
|
r.cond = ptr->cond; |
|
|
error = 0; |
|
|
break; |
|
|
} |
|
176 |
memset(buf, 0, sizeof(buf)); |
memset(buf, 0, sizeof(buf)); |
177 |
if (is_ipv6) |
if (is_ipv6) |
178 |
ccs_print_ipv6(buf, sizeof(buf), |
ccs_print_ipv6(buf, sizeof(buf), (const struct in6_addr *) |
179 |
(const struct in6_addr *) address); |
address); |
180 |
else |
else |
181 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
182 |
ccs_audit_network_log(&r, keyword, buf, port, !error); |
do { |
183 |
if (error) |
error = -EPERM; |
184 |
error = ccs_check_supervisor(&r, CCS_KEYWORD_ALLOW_NETWORK |
list_for_each_entry_rcu(ptr, &r.domain->acl_info_list, list) { |
185 |
"%s %s %u\n", keyword, buf, port); |
struct ccs_ip_network_acl *acl; |
186 |
if (error == 1) |
if (ptr->is_deleted || |
187 |
goto retry; |
ptr->type != CCS_TYPE_IP_NETWORK_ACL) |
188 |
if (!is_enforce) |
continue; |
189 |
|
acl = container_of(ptr, struct ccs_ip_network_acl, |
190 |
|
head); |
191 |
|
if (!(acl->perm & perm)) |
192 |
|
continue; |
193 |
|
if (!ccs_compare_number_union(port, &acl->port) || |
194 |
|
!ccs_condition(&r, ptr)) |
195 |
|
continue; |
196 |
|
switch (acl->address_type) { |
197 |
|
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
198 |
|
if (!ccs_address_matches_group(is_ipv6, |
199 |
|
address, |
200 |
|
acl->address. |
201 |
|
group)) |
202 |
|
continue; |
203 |
|
break; |
204 |
|
case CCS_IP_ADDRESS_TYPE_IPv4: |
205 |
|
if (is_ipv6 || ip < acl->address.ipv4.min || |
206 |
|
acl->address.ipv4.max < ip) |
207 |
|
continue; |
208 |
|
break; |
209 |
|
default: |
210 |
|
if (!is_ipv6 || |
211 |
|
memcmp(acl->address.ipv6.min, address, 16) |
212 |
|
> 0 || |
213 |
|
memcmp(address, acl->address.ipv6.max, 16) |
214 |
|
> 0) |
215 |
|
continue; |
216 |
|
break; |
217 |
|
} |
218 |
|
r.cond = ptr->cond; |
219 |
|
error = 0; |
220 |
|
break; |
221 |
|
} |
222 |
|
ccs_audit_network_log(&r, keyword, buf, port, !error); |
223 |
|
if (!error) |
224 |
|
break; |
225 |
|
error = ccs_supervisor(&r, CCS_KEYWORD_ALLOW_NETWORK |
226 |
|
"%s %s %u\n", keyword, buf, port); |
227 |
|
} while (error == CCS_RETRY_REQUEST); |
228 |
|
if (r.mode != CCS_CONFIG_ENFORCING) |
229 |
error = 0; |
error = 0; |
230 |
return error; |
return error; |
231 |
} |
} |
232 |
|
|
233 |
/** |
/** |
234 |
* ccs_check_network_entry - Check permission for network operation. |
* ccs_network_entry - Check permission for network operation. |
235 |
* |
* |
236 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
237 |
* @operation: Type of operation. |
* @operation: Type of operation. |
240 |
* |
* |
241 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
242 |
*/ |
*/ |
243 |
static int ccs_check_network_entry(const bool is_ipv6, const u8 operation, |
static int ccs_network_entry(const bool is_ipv6, const u8 operation, |
244 |
const u32 *address, const u16 port) |
const u32 *address, const u16 port) |
245 |
{ |
{ |
246 |
const int idx = ccs_read_lock(); |
const int idx = ccs_read_lock(); |
247 |
const int error = ccs_check_network_entry2(is_ipv6, operation, |
const int error = ccs_network_entry2(is_ipv6, operation, address, |
248 |
address, port); |
port); |
249 |
ccs_read_unlock(idx); |
ccs_read_unlock(idx); |
250 |
return error; |
return error; |
251 |
} |
} |
264 |
struct ccs_condition *condition, |
struct ccs_condition *condition, |
265 |
const bool is_delete) |
const bool is_delete) |
266 |
{ |
{ |
|
struct ccs_ip_network_acl *entry = NULL; |
|
267 |
struct ccs_acl_info *ptr; |
struct ccs_acl_info *ptr; |
268 |
struct ccs_ip_network_acl e = { |
struct ccs_ip_network_acl e = { |
269 |
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
327 |
case 1: |
case 1: |
328 |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
329 |
/* use host byte order to allow u32 comparison.*/ |
/* use host byte order to allow u32 comparison.*/ |
330 |
e.address.ipv4.min = ntohl(* (u32 *) min_address); |
e.address.ipv4.min = ntohl(*(u32 *) min_address); |
331 |
e.address.ipv4.max = ntohl(* (u32 *) max_address); |
e.address.ipv4.max = ntohl(*(u32 *) max_address); |
332 |
break; |
break; |
333 |
default: |
default: |
334 |
if (w[2][0] != '@') |
if (w[2][0] != '@') |
341 |
} |
} |
342 |
if (!ccs_parse_number_union(w[3], &e.port)) |
if (!ccs_parse_number_union(w[3], &e.port)) |
343 |
goto out; |
goto out; |
|
if (!is_delete) |
|
|
entry = kmalloc(sizeof(e), GFP_KERNEL); |
|
344 |
mutex_lock(&ccs_policy_lock); |
mutex_lock(&ccs_policy_lock); |
345 |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
346 |
struct ccs_ip_network_acl *acl = |
struct ccs_ip_network_acl *acl = |
347 |
container_of(ptr, struct ccs_ip_network_acl, |
container_of(ptr, struct ccs_ip_network_acl, head); |
|
head); |
|
348 |
if (ptr->type != CCS_TYPE_IP_NETWORK_ACL || |
if (ptr->type != CCS_TYPE_IP_NETWORK_ACL || |
349 |
ptr->cond != condition || |
ptr->cond != condition || |
350 |
ccs_memcmp(acl, &e, offsetof(typeof(e), address_type), |
ccs_memcmp(acl, &e, offsetof(typeof(e), address_type), |
363 |
error = 0; |
error = 0; |
364 |
break; |
break; |
365 |
} |
} |
366 |
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
if (!is_delete && error) { |
367 |
ccs_add_domain_acl(domain, &entry->head); |
struct ccs_ip_network_acl *entry = |
368 |
entry = NULL; |
ccs_commit_ok(&e, sizeof(e)); |
369 |
error = 0; |
if (entry) { |
370 |
|
ccs_add_domain_acl(domain, &entry->head); |
371 |
|
error = 0; |
372 |
|
} |
373 |
} |
} |
374 |
mutex_unlock(&ccs_policy_lock); |
mutex_unlock(&ccs_policy_lock); |
375 |
out: |
out: |
380 |
ccs_put_ipv6_address(e.address.ipv6.max); |
ccs_put_ipv6_address(e.address.ipv6.max); |
381 |
} |
} |
382 |
ccs_put_number_union(&e.port); |
ccs_put_number_union(&e.port); |
|
kfree(entry); |
|
383 |
return error; |
return error; |
384 |
} |
} |
385 |
|
|
386 |
/** |
/** |
387 |
* ccs_check_network_listen_acl - Check permission for listen() operation. |
* ccs_network_listen_acl - Check permission for listen() operation. |
388 |
* |
* |
389 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
390 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
392 |
* |
* |
393 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
394 |
*/ |
*/ |
395 |
static inline int ccs_check_network_listen_acl(const bool is_ipv6, |
static inline int ccs_network_listen_acl(const bool is_ipv6, const u8 *address, |
396 |
const u8 *address, |
const u16 port) |
|
const u16 port) |
|
397 |
{ |
{ |
398 |
return ccs_check_network_entry(is_ipv6, CCS_NETWORK_TCP_LISTEN, |
return ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_LISTEN, |
399 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
400 |
} |
} |
401 |
|
|
402 |
/** |
/** |
403 |
* ccs_check_network_connect_acl - Check permission for connect() operation. |
* ccs_network_connect_acl - Check permission for connect() operation. |
404 |
* |
* |
405 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
406 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
409 |
* |
* |
410 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
411 |
*/ |
*/ |
412 |
static inline int ccs_check_network_connect_acl(const bool is_ipv6, |
static inline int ccs_network_connect_acl(const bool is_ipv6, |
413 |
const int sock_type, |
const int sock_type, |
414 |
const u8 *address, |
const u8 *address, const u16 port) |
|
const u16 port) |
|
415 |
{ |
{ |
416 |
u8 operation; |
u8 operation; |
417 |
switch (sock_type) { |
switch (sock_type) { |
424 |
default: |
default: |
425 |
operation = CCS_NETWORK_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
426 |
} |
} |
427 |
return ccs_check_network_entry(is_ipv6, operation, |
return ccs_network_entry(is_ipv6, operation, |
428 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
429 |
} |
} |
430 |
|
|
431 |
/** |
/** |
432 |
* ccs_check_network_bind_acl - Check permission for bind() operation. |
* ccs_network_bind_acl - Check permission for bind() operation. |
433 |
* |
* |
434 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
435 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
438 |
* |
* |
439 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
440 |
*/ |
*/ |
441 |
static int ccs_check_network_bind_acl(const bool is_ipv6, const int sock_type, |
static int ccs_network_bind_acl(const bool is_ipv6, const int sock_type, |
442 |
const u8 *address, const u16 port) |
const u8 *address, const u16 port) |
443 |
{ |
{ |
444 |
u8 operation; |
u8 operation; |
445 |
switch (sock_type) { |
switch (sock_type) { |
452 |
default: |
default: |
453 |
operation = CCS_NETWORK_RAW_BIND; |
operation = CCS_NETWORK_RAW_BIND; |
454 |
} |
} |
455 |
return ccs_check_network_entry(is_ipv6, operation, |
return ccs_network_entry(is_ipv6, operation, |
456 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
457 |
} |
} |
458 |
|
|
459 |
/** |
/** |
460 |
* ccs_check_network_accept_acl - Check permission for accept() operation. |
* ccs_network_accept_acl - Check permission for accept() operation. |
461 |
* |
* |
462 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
463 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
465 |
* |
* |
466 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
467 |
*/ |
*/ |
468 |
static inline int ccs_check_network_accept_acl(const bool is_ipv6, |
static inline int ccs_network_accept_acl(const bool is_ipv6, const u8 *address, |
469 |
const u8 *address, |
const u16 port) |
|
const u16 port) |
|
470 |
{ |
{ |
471 |
int retval; |
int retval; |
472 |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
473 |
retval = ccs_check_network_entry(is_ipv6, CCS_NETWORK_TCP_ACCEPT, |
retval = ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_ACCEPT, |
474 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
475 |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
476 |
return retval; |
return retval; |
477 |
} |
} |
478 |
|
|
479 |
/** |
/** |
480 |
* ccs_check_network_sendmsg_acl - Check permission for sendmsg() operation. |
* ccs_network_sendmsg_acl - Check permission for sendmsg() operation. |
481 |
* |
* |
482 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
483 |
* @sock_type: Type of socket. (UDP or RAW) |
* @sock_type: Type of socket. (UDP or RAW) |
486 |
* |
* |
487 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
488 |
*/ |
*/ |
489 |
static inline int ccs_check_network_sendmsg_acl(const bool is_ipv6, |
static inline int ccs_network_sendmsg_acl(const bool is_ipv6, |
490 |
const int sock_type, |
const int sock_type, |
491 |
const u8 *address, |
const u8 *address, const u16 port) |
|
const u16 port) |
|
492 |
{ |
{ |
493 |
u8 operation; |
u8 operation; |
494 |
if (sock_type == SOCK_DGRAM) |
if (sock_type == SOCK_DGRAM) |
495 |
operation = CCS_NETWORK_UDP_CONNECT; |
operation = CCS_NETWORK_UDP_CONNECT; |
496 |
else |
else |
497 |
operation = CCS_NETWORK_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
498 |
return ccs_check_network_entry(is_ipv6, operation, |
return ccs_network_entry(is_ipv6, operation, |
499 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
500 |
} |
} |
501 |
|
|
502 |
/** |
/** |
503 |
* ccs_check_network_recvmsg_acl - Check permission for recvmsg() operation. |
* ccs_network_recvmsg_acl - Check permission for recvmsg() operation. |
504 |
* |
* |
505 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
506 |
* @sock_type: Type of socket. (UDP or RAW) |
* @sock_type: Type of socket. (UDP or RAW) |
509 |
* |
* |
510 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
511 |
*/ |
*/ |
512 |
static inline int ccs_check_network_recvmsg_acl(const bool is_ipv6, |
static inline int ccs_network_recvmsg_acl(const bool is_ipv6, |
513 |
const int sock_type, |
const int sock_type, |
514 |
const u8 *address, |
const u8 *address, const u16 port) |
|
const u16 port) |
|
515 |
{ |
{ |
516 |
int retval; |
int retval; |
517 |
const u8 operation |
const u8 operation |
518 |
= (sock_type == SOCK_DGRAM) ? |
= (sock_type == SOCK_DGRAM) ? |
519 |
CCS_NETWORK_UDP_CONNECT : CCS_NETWORK_RAW_CONNECT; |
CCS_NETWORK_UDP_CONNECT : CCS_NETWORK_RAW_CONNECT; |
520 |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
521 |
retval = ccs_check_network_entry(is_ipv6, operation, |
retval = ccs_network_entry(is_ipv6, operation, |
522 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
523 |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
524 |
return retval; |
return retval; |
525 |
} |
} |
527 |
#define MAX_SOCK_ADDR 128 /* net/socket.c */ |
#define MAX_SOCK_ADDR 128 /* net/socket.c */ |
528 |
|
|
529 |
/* Check permission for creating a socket. */ |
/* Check permission for creating a socket. */ |
530 |
int ccs_socket_create_permission(int family, int type, int protocol) |
static int __ccs_socket_create_permission(int family, int type, int protocol) |
531 |
{ |
{ |
532 |
int error = 0; |
int error = 0; |
533 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
557 |
} |
} |
558 |
|
|
559 |
/* Check permission for listening a TCP socket. */ |
/* Check permission for listening a TCP socket. */ |
560 |
int ccs_socket_listen_permission(struct socket *sock) |
static int __ccs_socket_listen_permission(struct socket *sock) |
561 |
{ |
{ |
562 |
int error = 0; |
int error = 0; |
563 |
char addr[MAX_SOCK_ADDR]; |
char addr[MAX_SOCK_ADDR]; |
583 |
struct sockaddr_in *addr4; |
struct sockaddr_in *addr4; |
584 |
case AF_INET6: |
case AF_INET6: |
585 |
addr6 = (struct sockaddr_in6 *) addr; |
addr6 = (struct sockaddr_in6 *) addr; |
586 |
error = ccs_check_network_listen_acl(true, |
error = ccs_network_listen_acl(true, |
587 |
addr6->sin6_addr.s6_addr, |
addr6->sin6_addr.s6_addr, |
588 |
addr6->sin6_port); |
addr6->sin6_port); |
589 |
break; |
break; |
590 |
case AF_INET: |
case AF_INET: |
591 |
addr4 = (struct sockaddr_in *) addr; |
addr4 = (struct sockaddr_in *) addr; |
592 |
error = ccs_check_network_listen_acl(false, |
error = ccs_network_listen_acl(false, |
593 |
(u8 *) &addr4->sin_addr, |
(u8 *) &addr4->sin_addr, |
594 |
addr4->sin_port); |
addr4->sin_port); |
595 |
break; |
break; |
596 |
} |
} |
597 |
return error; |
return error; |
598 |
} |
} |
599 |
|
|
600 |
/* Check permission for setting the remote IP address/port pair of a socket. */ |
/* Check permission for setting the remote IP address/port pair of a socket. */ |
601 |
int ccs_socket_connect_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_connect_permission(struct socket *sock, |
602 |
int addr_len) |
struct sockaddr *addr, int addr_len) |
603 |
{ |
{ |
604 |
int error = 0; |
int error = 0; |
605 |
const unsigned int type = sock->type; |
const unsigned int type = sock->type; |
626 |
port = addr6->sin6_port; |
port = addr6->sin6_port; |
627 |
else |
else |
628 |
port = htons(sock->sk->sk_protocol); |
port = htons(sock->sk->sk_protocol); |
629 |
error = ccs_check_network_connect_acl(true, type, |
error = ccs_network_connect_acl(true, type, |
630 |
addr6->sin6_addr.s6_addr, |
addr6->sin6_addr.s6_addr, |
631 |
port); |
port); |
632 |
break; |
break; |
633 |
case AF_INET: |
case AF_INET: |
634 |
if (addr_len < sizeof(struct sockaddr_in)) |
if (addr_len < sizeof(struct sockaddr_in)) |
638 |
port = addr4->sin_port; |
port = addr4->sin_port; |
639 |
else |
else |
640 |
port = htons(sock->sk->sk_protocol); |
port = htons(sock->sk->sk_protocol); |
641 |
error = ccs_check_network_connect_acl(false, type, |
error = ccs_network_connect_acl(false, type, |
642 |
(u8 *) &addr4->sin_addr, |
(u8 *) &addr4->sin_addr, |
643 |
port); |
port); |
644 |
break; |
break; |
645 |
} |
} |
646 |
if (type != SOCK_STREAM) |
if (type != SOCK_STREAM) |
656 |
} |
} |
657 |
|
|
658 |
/* Check permission for setting the local IP address/port pair of a socket. */ |
/* Check permission for setting the local IP address/port pair of a socket. */ |
659 |
int ccs_socket_bind_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_bind_permission(struct socket *sock, |
660 |
int addr_len) |
struct sockaddr *addr, int addr_len) |
661 |
{ |
{ |
662 |
int error = 0; |
int error = 0; |
663 |
const unsigned int type = sock->type; |
const unsigned int type = sock->type; |
684 |
port = addr6->sin6_port; |
port = addr6->sin6_port; |
685 |
else |
else |
686 |
port = htons(sock->sk->sk_protocol); |
port = htons(sock->sk->sk_protocol); |
687 |
error = ccs_check_network_bind_acl(true, type, |
error = ccs_network_bind_acl(true, type, |
688 |
addr6->sin6_addr.s6_addr, |
addr6->sin6_addr.s6_addr, |
689 |
port); |
port); |
690 |
break; |
break; |
691 |
case AF_INET: |
case AF_INET: |
692 |
if (addr_len < sizeof(struct sockaddr_in)) |
if (addr_len < sizeof(struct sockaddr_in)) |
696 |
port = addr4->sin_port; |
port = addr4->sin_port; |
697 |
else |
else |
698 |
port = htons(sock->sk->sk_protocol); |
port = htons(sock->sk->sk_protocol); |
699 |
error = ccs_check_network_bind_acl(false, type, |
error = ccs_network_bind_acl(false, type, |
700 |
(u8 *) &addr4->sin_addr, |
(u8 *) &addr4->sin_addr, |
701 |
port); |
port); |
702 |
break; |
break; |
703 |
} |
} |
704 |
return error; |
return error; |
709 |
* |
* |
710 |
* Currently, the LSM hook for this purpose is not provided. |
* Currently, the LSM hook for this purpose is not provided. |
711 |
*/ |
*/ |
712 |
int ccs_socket_accept_permission(struct socket *sock, struct sockaddr *addr) |
static int __ccs_socket_accept_permission(struct socket *sock, |
713 |
|
struct sockaddr *addr) |
714 |
{ |
{ |
715 |
int error = 0; |
int error = 0; |
716 |
int addr_len; |
int addr_len; |
732 |
struct sockaddr_in *addr4; |
struct sockaddr_in *addr4; |
733 |
case AF_INET6: |
case AF_INET6: |
734 |
addr6 = (struct sockaddr_in6 *) addr; |
addr6 = (struct sockaddr_in6 *) addr; |
735 |
error = ccs_check_network_accept_acl(true, |
error = ccs_network_accept_acl(true, |
736 |
addr6->sin6_addr.s6_addr, |
addr6->sin6_addr.s6_addr, |
737 |
addr6->sin6_port); |
addr6->sin6_port); |
738 |
break; |
break; |
739 |
case AF_INET: |
case AF_INET: |
740 |
addr4 = (struct sockaddr_in *) addr; |
addr4 = (struct sockaddr_in *) addr; |
741 |
error = ccs_check_network_accept_acl(false, |
error = ccs_network_accept_acl(false, |
742 |
(u8 *) &addr4->sin_addr, |
(u8 *) &addr4->sin_addr, |
743 |
addr4->sin_port); |
addr4->sin_port); |
744 |
break; |
break; |
745 |
} |
} |
746 |
return error; |
return error; |
747 |
} |
} |
748 |
|
|
749 |
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
750 |
int ccs_socket_sendmsg_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_sendmsg_permission(struct socket *sock, |
751 |
int addr_len) |
struct msghdr *msg, int size) |
752 |
{ |
{ |
753 |
|
struct sockaddr *addr = (struct sockaddr *) msg->msg_name; |
754 |
|
const int addr_len = msg->msg_namelen; |
755 |
int error = 0; |
int error = 0; |
756 |
const int type = sock->type; |
const int type = sock->type; |
757 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
771 |
port = addr6->sin6_port; |
port = addr6->sin6_port; |
772 |
else |
else |
773 |
port = htons(sock->sk->sk_protocol); |
port = htons(sock->sk->sk_protocol); |
774 |
error = ccs_check_network_sendmsg_acl(true, type, |
error = ccs_network_sendmsg_acl(true, type, |
775 |
addr6->sin6_addr.s6_addr, |
addr6->sin6_addr.s6_addr, |
776 |
port); |
port); |
777 |
break; |
break; |
778 |
case AF_INET: |
case AF_INET: |
779 |
if (addr_len < sizeof(struct sockaddr_in)) |
if (addr_len < sizeof(struct sockaddr_in)) |
783 |
port = addr4->sin_port; |
port = addr4->sin_port; |
784 |
else |
else |
785 |
port = htons(sock->sk->sk_protocol); |
port = htons(sock->sk->sk_protocol); |
786 |
error = ccs_check_network_sendmsg_acl(false, type, |
error = ccs_network_sendmsg_acl(false, type, |
787 |
(u8 *) &addr4->sin_addr, |
(u8 *) &addr4->sin_addr, port); |
|
port); |
|
788 |
break; |
break; |
789 |
} |
} |
790 |
return error; |
return error; |
792 |
|
|
793 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
794 |
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
795 |
|
#if !defined(AX_MAJOR) || AX_MAJOR != 3 || !defined(AX_MINOR) || AX_MINOR < 2 |
796 |
|
|
797 |
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
798 |
{ |
{ |
811 |
|
|
812 |
#endif |
#endif |
813 |
#endif |
#endif |
814 |
|
#endif |
815 |
|
|
816 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12) |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12) |
817 |
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
856 |
* |
* |
857 |
* Currently, the LSM hook for this purpose is not provided. |
* Currently, the LSM hook for this purpose is not provided. |
858 |
*/ |
*/ |
859 |
int ccs_socket_recvmsg_permission(struct sock *sk, struct sk_buff *skb, |
static int __ccs_socket_recvmsg_permission(struct sock *sk, |
860 |
const unsigned int flags) |
struct sk_buff *skb, |
861 |
|
const unsigned int flags) |
862 |
{ |
{ |
863 |
int error = 0; |
int error = 0; |
864 |
const unsigned int type = sk->sk_type; |
const unsigned int type = sk->sk_type; |
885 |
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
886 |
port = htons(sk->sk_protocol); |
port = htons(sk->sk_protocol); |
887 |
} |
} |
888 |
error = ccs_check_network_recvmsg_acl(true, type, |
error = ccs_network_recvmsg_acl(true, type, |
889 |
(u8 *) &sin6, port); |
(u8 *) &sin6, port); |
890 |
break; |
break; |
891 |
case PF_INET: |
case PF_INET: |
892 |
if (type == SOCK_DGRAM) { /* UDP IPv4 */ |
if (type == SOCK_DGRAM) { /* UDP IPv4 */ |
896 |
sin4.s_addr = ip_hdr(skb)->saddr; |
sin4.s_addr = ip_hdr(skb)->saddr; |
897 |
port = htons(sk->sk_protocol); |
port = htons(sk->sk_protocol); |
898 |
} |
} |
899 |
error = ccs_check_network_recvmsg_acl(false, type, |
error = ccs_network_recvmsg_acl(false, type, |
900 |
(u8 *) &sin4, port); |
(u8 *) &sin4, port); |
901 |
break; |
break; |
902 |
} |
} |
903 |
if (!error) |
if (!error) |
920 |
/* Hope less harmful than -EPERM. */ |
/* Hope less harmful than -EPERM. */ |
921 |
return -ENOMEM; |
return -ENOMEM; |
922 |
} |
} |
923 |
EXPORT_SYMBOL(ccs_socket_recvmsg_permission); |
|
924 |
|
void __init ccs_network_init(void) |
925 |
|
{ |
926 |
|
ccsecurity_ops.socket_create_permission = |
927 |
|
__ccs_socket_create_permission; |
928 |
|
ccsecurity_ops.socket_listen_permission = |
929 |
|
__ccs_socket_listen_permission; |
930 |
|
ccsecurity_ops.socket_connect_permission = |
931 |
|
__ccs_socket_connect_permission; |
932 |
|
ccsecurity_ops.socket_bind_permission = __ccs_socket_bind_permission; |
933 |
|
ccsecurity_ops.socket_accept_permission = |
934 |
|
__ccs_socket_accept_permission; |
935 |
|
ccsecurity_ops.socket_sendmsg_permission = |
936 |
|
__ccs_socket_sendmsg_permission; |
937 |
|
ccsecurity_ops.socket_recvmsg_permission = |
938 |
|
__ccs_socket_recvmsg_permission; |
939 |
|
} |