| 1 |
/* |
| 2 |
* fs/tomoyo_network.c |
| 3 |
* |
| 4 |
* Implementation of the Domain-Based Mandatory Access Control. |
| 5 |
* |
| 6 |
* Copyright (C) 2005-2007 NTT DATA CORPORATION |
| 7 |
* |
| 8 |
* Version: 1.5.2-pre 2007/11/19 |
| 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 |
/***** TOMOYO Linux start. *****/ |
| 15 |
|
| 16 |
#include <linux/ccs_common.h> |
| 17 |
#include <linux/tomoyo.h> |
| 18 |
#include <linux/realpath.h> |
| 19 |
#include <net/ip.h> |
| 20 |
|
| 21 |
/************************* VARIABLES *************************/ |
| 22 |
|
| 23 |
extern struct mutex domain_acl_lock; |
| 24 |
|
| 25 |
/************************* AUDIT FUNCTIONS *************************/ |
| 26 |
|
| 27 |
static int AuditNetworkLog(const bool is_ipv6, const char *operation, const u32 *address, const u16 port, const bool is_granted) |
| 28 |
{ |
| 29 |
char *buf; |
| 30 |
int len = 256; |
| 31 |
if (CanSaveAuditLog(is_granted) < 0) return -ENOMEM; |
| 32 |
if ((buf = InitAuditLog(&len)) == NULL) return -ENOMEM; |
| 33 |
snprintf(buf + strlen(buf), len - strlen(buf) - 1, KEYWORD_ALLOW_NETWORK "%s ", operation); |
| 34 |
if (is_ipv6) { |
| 35 |
print_ipv6(buf + strlen(buf), len - strlen(buf), (const struct in6_addr *) address); |
| 36 |
} else { |
| 37 |
u32 ip = *address; |
| 38 |
snprintf(buf + strlen(buf), len - strlen(buf) - 1, "%u.%u.%u.%u", NIPQUAD(ip)); |
| 39 |
} |
| 40 |
snprintf(buf + strlen(buf), len - strlen(buf) - 1, " %u\n", port); |
| 41 |
return WriteAuditLog(buf, is_granted); |
| 42 |
} |
| 43 |
|
| 44 |
/************************* UTILITY FUNCTIONS *************************/ |
| 45 |
|
| 46 |
/* Keep the given IPv6 address on the RAM. The RAM is shared, so NEVER try to modify or kfree() the returned address. */ |
| 47 |
static const struct in6_addr *SaveIPv6Address(const struct in6_addr *addr) |
| 48 |
{ |
| 49 |
static const int block_size = 16; |
| 50 |
struct addr_list { |
| 51 |
struct in6_addr addr[block_size]; |
| 52 |
struct addr_list *next; |
| 53 |
u32 in_use_count; |
| 54 |
}; |
| 55 |
static struct addr_list *list = NULL; |
| 56 |
struct addr_list *ptr; |
| 57 |
static DEFINE_MUTEX(lock); |
| 58 |
int i = block_size; |
| 59 |
if (!addr) return NULL; |
| 60 |
mutex_lock(&lock); |
| 61 |
for (ptr = list; ptr; ptr = ptr->next) { |
| 62 |
for (i = 0; i < ptr->in_use_count; i++) { |
| 63 |
if (memcmp(&ptr->addr[i], addr, sizeof(*addr)) == 0) goto ok; |
| 64 |
} |
| 65 |
if (i < block_size) break; |
| 66 |
} |
| 67 |
if (i == block_size && (ptr = alloc_element(sizeof(*ptr))) != NULL) { |
| 68 |
struct addr_list *p = list; |
| 69 |
if (p) { |
| 70 |
while (p->next) p = p->next; |
| 71 |
p->next = ptr; |
| 72 |
} else { |
| 73 |
list = ptr; |
| 74 |
} |
| 75 |
i = 0; |
| 76 |
} |
| 77 |
if (ptr) ptr->addr[ptr->in_use_count++] = *addr; |
| 78 |
ok: |
| 79 |
mutex_unlock(&lock); |
| 80 |
return ptr ? &ptr->addr[i] : NULL; |
| 81 |
} |
| 82 |
|
| 83 |
/************************* ADDRESS GROUP HANDLER *************************/ |
| 84 |
|
| 85 |
static LIST_HEAD(address_group_list); |
| 86 |
|
| 87 |
static int AddAddressGroupEntry(const char *group_name, const bool is_ipv6, const u16 *min_address, const u16 *max_address, const bool is_delete) |
| 88 |
{ |
| 89 |
static DEFINE_MUTEX(lock); |
| 90 |
struct address_group_entry *new_group, *group; |
| 91 |
struct address_group_member *new_member, *member; |
| 92 |
const struct path_info *saved_group_name; |
| 93 |
const struct in6_addr *saved_min_address = NULL, *saved_max_address = NULL; |
| 94 |
int error = -ENOMEM; |
| 95 |
bool found = 0; |
| 96 |
if (!IsCorrectPath(group_name, 0, 0, 0, __FUNCTION__) || !group_name[0]) return -EINVAL; |
| 97 |
if ((saved_group_name = SaveName(group_name)) == NULL) return -ENOMEM; |
| 98 |
if (is_ipv6) { |
| 99 |
if ((saved_min_address = SaveIPv6Address((struct in6_addr *) min_address)) == NULL |
| 100 |
|| (saved_max_address = SaveIPv6Address((struct in6_addr *) max_address))) return -ENOMEM; |
| 101 |
} |
| 102 |
mutex_lock(&lock); |
| 103 |
list_for_each_entry(group, &address_group_list, list) { |
| 104 |
if (saved_group_name != group->group_name) continue; |
| 105 |
list_for_each_entry(member, &group->address_group_member_list, list) { |
| 106 |
if (member->is_ipv6 != is_ipv6) continue; |
| 107 |
if (is_ipv6) { |
| 108 |
if (member->min.ipv6 != saved_min_address || member->max.ipv6 != saved_max_address) continue; |
| 109 |
} else { |
| 110 |
if (member->min.ipv4 != * (u32 *) min_address || member->max.ipv4 != * (u32 *) max_address) continue; |
| 111 |
} |
| 112 |
member->is_deleted = is_delete; |
| 113 |
error = 0; |
| 114 |
goto out; |
| 115 |
} |
| 116 |
found = 1; |
| 117 |
break; |
| 118 |
} |
| 119 |
if (is_delete) { |
| 120 |
error = -ENOENT; |
| 121 |
goto out; |
| 122 |
} |
| 123 |
if (!found) { |
| 124 |
if ((new_group = alloc_element(sizeof(*new_group))) == NULL) goto out; |
| 125 |
INIT_LIST_HEAD(&new_group->address_group_member_list); |
| 126 |
new_group->group_name = saved_group_name; |
| 127 |
list_add_tail_mb(&new_group->list, &address_group_list); |
| 128 |
group = new_group; |
| 129 |
} |
| 130 |
if ((new_member = alloc_element(sizeof(*new_member))) == NULL) goto out; |
| 131 |
new_member->is_ipv6 = is_ipv6; |
| 132 |
if (is_ipv6) { |
| 133 |
new_member->min.ipv6 = saved_min_address; |
| 134 |
new_member->max.ipv6 = saved_max_address; |
| 135 |
} else { |
| 136 |
new_member->min.ipv4 = * (u32 *) min_address; |
| 137 |
new_member->max.ipv4 = * (u32 *) max_address; |
| 138 |
} |
| 139 |
list_add_tail_mb(&new_member->list, &group->address_group_member_list); |
| 140 |
error = 0; |
| 141 |
out: |
| 142 |
mutex_unlock(&lock); |
| 143 |
return error; |
| 144 |
} |
| 145 |
|
| 146 |
int AddAddressGroupPolicy(char *data, const bool is_delete) |
| 147 |
{ |
| 148 |
int count, is_ipv6; |
| 149 |
u16 min_address[8], max_address[8]; |
| 150 |
char *cp = strchr(data, ' '); |
| 151 |
if (!cp) return -EINVAL; |
| 152 |
*cp++ = '\0'; |
| 153 |
if ((count = sscanf(cp, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
| 154 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 155 |
&min_address[4], &min_address[5], &min_address[6], &min_address[7], |
| 156 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3], |
| 157 |
&max_address[4], &max_address[5], &max_address[6], &max_address[7])) == 8 || count == 16) { |
| 158 |
int i; |
| 159 |
for (i = 0; i < 8; i++) { |
| 160 |
min_address[i] = htons(min_address[i]); |
| 161 |
max_address[i] = htons(max_address[i]); |
| 162 |
} |
| 163 |
if (count == 8) memmove(max_address, min_address, sizeof(min_address)); |
| 164 |
is_ipv6 = 1; |
| 165 |
} else if ((count = sscanf(cp, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
| 166 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 167 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3])) == 4 || count == 8) { |
| 168 |
u32 ip = ((((u8) min_address[0]) << 24) + (((u8) min_address[1]) << 16) + (((u8) min_address[2]) << 8) + (u8) min_address[3]); |
| 169 |
* (u32 *) min_address = ip; |
| 170 |
if (count == 8) ip = ((((u8) max_address[0]) << 24) + (((u8) max_address[1]) << 16) + (((u8) max_address[2]) << 8) + (u8) max_address[3]); |
| 171 |
* (u32 *) max_address = ip; |
| 172 |
is_ipv6 = 0; |
| 173 |
} else { |
| 174 |
return -EINVAL; |
| 175 |
} |
| 176 |
return AddAddressGroupEntry(data, is_ipv6, min_address, max_address, is_delete); |
| 177 |
} |
| 178 |
|
| 179 |
static struct address_group_entry *FindOrAssignNewAddressGroup(const char *group_name) |
| 180 |
{ |
| 181 |
int i; |
| 182 |
struct address_group_entry *group; |
| 183 |
for (i = 0; i <= 1; i++) { |
| 184 |
list_for_each_entry(group, &address_group_list, list) { |
| 185 |
if (strcmp(group_name, group->group_name->name) == 0) return group; |
| 186 |
} |
| 187 |
if (i == 0) { |
| 188 |
const u16 dummy[2] = { 0, 0 }; |
| 189 |
AddAddressGroupEntry(group_name, 0, dummy, dummy, 0); |
| 190 |
AddAddressGroupEntry(group_name, 0, dummy, dummy, 1); |
| 191 |
} |
| 192 |
} |
| 193 |
return NULL; |
| 194 |
} |
| 195 |
|
| 196 |
static int AddressMatchesToGroup(const bool is_ipv6, const u32 *address, const struct address_group_entry *group) |
| 197 |
{ |
| 198 |
struct address_group_member *member; |
| 199 |
const u32 ip = ntohl(*address); |
| 200 |
list_for_each_entry(member, &group->address_group_member_list, list) { |
| 201 |
if (member->is_deleted) continue; |
| 202 |
if (member->is_ipv6) { |
| 203 |
if (is_ipv6 && memcmp(member->min.ipv6, address, 16) <= 0 && memcmp(address, member->max.ipv6, 16) <= 0) return 1; |
| 204 |
} else { |
| 205 |
if (!is_ipv6 && member->min.ipv4 <= ip && ip <= member->max.ipv4) return 1; |
| 206 |
} |
| 207 |
} |
| 208 |
return 0; |
| 209 |
} |
| 210 |
|
| 211 |
int ReadAddressGroupPolicy(struct io_buffer *head) |
| 212 |
{ |
| 213 |
struct list_head *gpos; |
| 214 |
struct list_head *mpos; |
| 215 |
list_for_each_cookie(gpos, head->read_var1, &address_group_list) { |
| 216 |
struct address_group_entry *group; |
| 217 |
group = list_entry(gpos, struct address_group_entry, list); |
| 218 |
list_for_each_cookie(mpos, head->read_var2, &group->address_group_member_list) { |
| 219 |
char buf[128]; |
| 220 |
struct address_group_member *member; |
| 221 |
member = list_entry(mpos, struct address_group_member, list); |
| 222 |
if (member->is_deleted) continue; |
| 223 |
if (member->is_ipv6) { |
| 224 |
const struct in6_addr *min_address = member->min.ipv6, *max_address = member->max.ipv6; |
| 225 |
print_ipv6(buf, sizeof(buf), min_address); |
| 226 |
if (min_address != max_address) { |
| 227 |
char *cp = strchr(buf, '\0'); |
| 228 |
*cp++ = '-'; |
| 229 |
print_ipv6(cp, sizeof(buf) - strlen(buf), max_address); |
| 230 |
} |
| 231 |
} else { |
| 232 |
const u32 min_address = member->min.ipv4, max_address = member->max.ipv4; |
| 233 |
memset(buf, 0, sizeof(buf)); |
| 234 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(min_address)); |
| 235 |
if (min_address != max_address) { |
| 236 |
const int len = strlen(buf); |
| 237 |
snprintf(buf + len, sizeof(buf) - 1 - len, "-%u.%u.%u.%u", HIPQUAD(max_address)); |
| 238 |
} |
| 239 |
} |
| 240 |
if (io_printf(head, KEYWORD_ADDRESS_GROUP "%s %s\n", group->group_name->name, buf)) return -ENOMEM; |
| 241 |
} |
| 242 |
} |
| 243 |
return 0; |
| 244 |
} |
| 245 |
|
| 246 |
/************************* NETWORK NETWORK ACL HANDLER *************************/ |
| 247 |
|
| 248 |
#if !defined(NIP6) |
| 249 |
#define NIP6(addr) \ |
| 250 |
ntohs((addr).s6_addr16[0]), \ |
| 251 |
ntohs((addr).s6_addr16[1]), \ |
| 252 |
ntohs((addr).s6_addr16[2]), \ |
| 253 |
ntohs((addr).s6_addr16[3]), \ |
| 254 |
ntohs((addr).s6_addr16[4]), \ |
| 255 |
ntohs((addr).s6_addr16[5]), \ |
| 256 |
ntohs((addr).s6_addr16[6]), \ |
| 257 |
ntohs((addr).s6_addr16[7]) |
| 258 |
#endif |
| 259 |
|
| 260 |
char *print_ipv6(char *buffer, const int buffer_len, const struct in6_addr *ip) |
| 261 |
{ |
| 262 |
memset(buffer, 0, buffer_len); |
| 263 |
snprintf(buffer, buffer_len - 1, "%x:%x:%x:%x:%x:%x:%x:%x", NIP6(*ip)); |
| 264 |
return buffer; |
| 265 |
} |
| 266 |
|
| 267 |
const char *network2keyword(const unsigned int operation) |
| 268 |
{ |
| 269 |
const char *keyword = "unknown"; |
| 270 |
switch (operation) { |
| 271 |
case NETWORK_ACL_UDP_BIND: |
| 272 |
keyword = "UDP bind"; |
| 273 |
break; |
| 274 |
case NETWORK_ACL_UDP_CONNECT: |
| 275 |
keyword = "UDP connect"; |
| 276 |
break; |
| 277 |
case NETWORK_ACL_TCP_BIND: |
| 278 |
keyword = "TCP bind"; |
| 279 |
break; |
| 280 |
case NETWORK_ACL_TCP_LISTEN: |
| 281 |
keyword = "TCP listen"; |
| 282 |
break; |
| 283 |
case NETWORK_ACL_TCP_CONNECT: |
| 284 |
keyword = "TCP connect"; |
| 285 |
break; |
| 286 |
case NETWORK_ACL_TCP_ACCEPT: |
| 287 |
keyword = "TCP accept"; |
| 288 |
break; |
| 289 |
case NETWORK_ACL_RAW_BIND: |
| 290 |
keyword = "RAW bind"; |
| 291 |
break; |
| 292 |
case NETWORK_ACL_RAW_CONNECT: |
| 293 |
keyword = "RAW connect"; |
| 294 |
break; |
| 295 |
} |
| 296 |
return keyword; |
| 297 |
} |
| 298 |
|
| 299 |
static int AddNetworkEntry(const u8 operation, const u8 record_type, const struct address_group_entry *group, const u32 *min_address, const u32 *max_address, const u16 min_port, const u16 max_port, struct domain_info *domain, const struct condition_list *condition, const bool is_delete) |
| 300 |
{ |
| 301 |
struct acl_info *ptr; |
| 302 |
struct ip_network_acl_record *acl; |
| 303 |
int error = -ENOMEM; |
| 304 |
const u32 min_ip = ntohl(*min_address), max_ip = ntohl(*max_address); /* using host byte order to allow u32 comparison than memcmp().*/ |
| 305 |
const struct in6_addr *saved_min_address = NULL, *saved_max_address = NULL; |
| 306 |
if (!domain) return -EINVAL; |
| 307 |
if (record_type == IP_RECORD_TYPE_IPv6) { |
| 308 |
if ((saved_min_address = SaveIPv6Address((struct in6_addr *) min_address)) == NULL |
| 309 |
|| (saved_max_address = SaveIPv6Address((struct in6_addr *) max_address))) return -ENOMEM; |
| 310 |
} |
| 311 |
mutex_lock(&domain_acl_lock); |
| 312 |
if (!is_delete) { |
| 313 |
list_for_each_entry(ptr, &domain->acl_info_list, list) { |
| 314 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
| 315 |
if (ptr->type == TYPE_IP_NETWORK_ACL && acl->operation_type == operation && acl->record_type == record_type && ptr->cond == condition && acl->min_port == min_port && max_port == acl->max_port) { |
| 316 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 317 |
if (acl->u.group == group) { |
| 318 |
ptr->is_deleted = 0; |
| 319 |
/* Found. Nothing to do. */ |
| 320 |
error = 0; |
| 321 |
goto out; |
| 322 |
} |
| 323 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
| 324 |
if (acl->u.ipv4.min == min_ip && max_ip == acl->u.ipv4.max) { |
| 325 |
ptr->is_deleted = 0; |
| 326 |
/* Found. Nothing to do. */ |
| 327 |
error = 0; |
| 328 |
goto out; |
| 329 |
} |
| 330 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
| 331 |
if (acl->u.ipv6.min == saved_min_address && saved_max_address == acl->u.ipv6.max) { |
| 332 |
ptr->is_deleted = 0; |
| 333 |
/* Found. Nothing to do. */ |
| 334 |
error = 0; |
| 335 |
goto out; |
| 336 |
} |
| 337 |
} |
| 338 |
} |
| 339 |
} |
| 340 |
/* Not found. Append it to the tail. */ |
| 341 |
if ((acl = alloc_element(sizeof(*acl))) == NULL) goto out; |
| 342 |
acl->head.type = TYPE_IP_NETWORK_ACL; |
| 343 |
acl->operation_type = operation; |
| 344 |
acl->record_type = record_type; |
| 345 |
acl->head.cond = condition; |
| 346 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 347 |
acl->u.group = group; |
| 348 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
| 349 |
acl->u.ipv4.min = min_ip; |
| 350 |
acl->u.ipv4.max = max_ip; |
| 351 |
} else { |
| 352 |
acl->u.ipv6.min = saved_min_address; |
| 353 |
acl->u.ipv6.max = saved_max_address; |
| 354 |
} |
| 355 |
acl->min_port = min_port; |
| 356 |
acl->max_port = max_port; |
| 357 |
error = AddDomainACL(domain, &acl->head); |
| 358 |
} else { |
| 359 |
error = -ENOENT; |
| 360 |
list_for_each_entry(ptr, &domain->acl_info_list, list) { |
| 361 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
| 362 |
if (ptr->type != TYPE_IP_NETWORK_ACL || ptr->is_deleted || acl->operation_type != operation || acl->record_type != record_type || ptr->cond != condition || acl->min_port != min_port || acl->max_port != max_port) continue; |
| 363 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 364 |
if (acl->u.group != group) continue; |
| 365 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
| 366 |
if (acl->u.ipv4.min != min_ip || max_ip != acl->u.ipv4.max) continue; |
| 367 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
| 368 |
if (acl->u.ipv6.min != saved_min_address || saved_max_address != acl->u.ipv6.max) continue; |
| 369 |
} |
| 370 |
error = DelDomainACL(ptr); |
| 371 |
break; |
| 372 |
} |
| 373 |
} |
| 374 |
out: ; |
| 375 |
mutex_unlock(&domain_acl_lock); |
| 376 |
return error; |
| 377 |
} |
| 378 |
|
| 379 |
static int CheckNetworkEntry(const bool is_ipv6, const int operation, const u32 *address, const u16 port) |
| 380 |
{ |
| 381 |
struct domain_info * const domain = current->domain_info; |
| 382 |
struct acl_info *ptr; |
| 383 |
const char *keyword = network2keyword(operation); |
| 384 |
const bool is_enforce = CheckCCSEnforce(CCS_TOMOYO_MAC_FOR_NETWORK); |
| 385 |
const u32 ip = ntohl(*address); /* using host byte order to allow u32 comparison than memcmp().*/ |
| 386 |
bool found = 0; |
| 387 |
if (!CheckCCSFlags(CCS_TOMOYO_MAC_FOR_NETWORK)) return 0; |
| 388 |
list_for_each_entry(ptr, &domain->acl_info_list, list) { |
| 389 |
struct ip_network_acl_record *acl; |
| 390 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
| 391 |
if (ptr->type != TYPE_IP_NETWORK_ACL || ptr->is_deleted || acl->operation_type != operation || port < acl->min_port || acl->max_port < port || CheckCondition(ptr->cond, NULL)) continue; |
| 392 |
if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 393 |
if (!AddressMatchesToGroup(is_ipv6, address, acl->u.group)) continue; |
| 394 |
} else if (acl->record_type == IP_RECORD_TYPE_IPv4) { |
| 395 |
if (is_ipv6 || ip < acl->u.ipv4.min || acl->u.ipv4.max < ip) continue; |
| 396 |
} else { |
| 397 |
if (!is_ipv6 || memcmp(acl->u.ipv6.min, address, 16) > 0 || memcmp(address, acl->u.ipv6.max, 16) > 0) continue; |
| 398 |
} |
| 399 |
found = 1; |
| 400 |
break; |
| 401 |
|
| 402 |
} |
| 403 |
AuditNetworkLog(is_ipv6, keyword, address, port, found); |
| 404 |
if (found) return 0; |
| 405 |
if (TomoyoVerboseMode()) { |
| 406 |
if (is_ipv6) { |
| 407 |
char buf[64]; |
| 408 |
print_ipv6(buf, sizeof(buf), (const struct in6_addr *) address); |
| 409 |
printk("TOMOYO-%s: %s to %s %u denied for %s\n", GetMSG(is_enforce), keyword, buf, port, GetLastName(domain)); |
| 410 |
} else { |
| 411 |
printk("TOMOYO-%s: %s to %u.%u.%u.%u %u denied for %s\n", GetMSG(is_enforce), keyword, HIPQUAD(ip), port, GetLastName(domain)); |
| 412 |
} |
| 413 |
} |
| 414 |
AuditNetworkLog(is_ipv6, keyword, address, port, 0); |
| 415 |
if (is_enforce) { |
| 416 |
if (is_ipv6) { |
| 417 |
char buf[64]; |
| 418 |
print_ipv6(buf, sizeof(buf), (const struct in6_addr *) address); |
| 419 |
return CheckSupervisor("%s\n" KEYWORD_ALLOW_NETWORK "%s %s %u\n", domain->domainname->name, keyword, buf, port); |
| 420 |
} |
| 421 |
return CheckSupervisor("%s\n" KEYWORD_ALLOW_NETWORK "%s %u.%u.%u.%u %u\n", domain->domainname->name, keyword, HIPQUAD(ip), port); |
| 422 |
} |
| 423 |
if (CheckCCSAccept(CCS_TOMOYO_MAC_FOR_NETWORK, domain)) AddNetworkEntry(operation, is_ipv6 ? IP_RECORD_TYPE_IPv6 : IP_RECORD_TYPE_IPv4, NULL, address, address, port, port, domain, NULL, 0); |
| 424 |
return 0; |
| 425 |
} |
| 426 |
|
| 427 |
int AddNetworkPolicy(char *data, struct domain_info *domain, const struct condition_list *condition, const bool is_delete) |
| 428 |
{ |
| 429 |
u8 sock_type, operation, record_type; |
| 430 |
u16 min_address[8], max_address[8]; |
| 431 |
struct address_group_entry *group = NULL; |
| 432 |
u16 min_port, max_port; |
| 433 |
int count; |
| 434 |
char *cp1 = NULL, *cp2 = NULL; |
| 435 |
if ((cp1 = strchr(data, ' ')) == NULL) goto out; cp1++; |
| 436 |
if (strncmp(data, "TCP ", 4) == 0) sock_type = SOCK_STREAM; |
| 437 |
else if (strncmp(data, "UDP ", 4) == 0) sock_type = SOCK_DGRAM; |
| 438 |
else if (strncmp(data, "RAW ", 4) == 0) sock_type = SOCK_RAW; |
| 439 |
else goto out; |
| 440 |
if ((cp2 = strchr(cp1, ' ')) == NULL) goto out; cp2++; |
| 441 |
if (strncmp(cp1, "bind ", 5) == 0) { |
| 442 |
operation = (sock_type == SOCK_STREAM) ? NETWORK_ACL_TCP_BIND : (sock_type == SOCK_DGRAM) ? NETWORK_ACL_UDP_BIND : NETWORK_ACL_RAW_BIND; |
| 443 |
} else if (strncmp(cp1, "connect ", 8) == 0) { |
| 444 |
operation = (sock_type == SOCK_STREAM) ? NETWORK_ACL_TCP_CONNECT : (sock_type == SOCK_DGRAM) ? NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
| 445 |
} else if (sock_type == SOCK_STREAM && strncmp(cp1, "listen ", 7) == 0) { |
| 446 |
operation = NETWORK_ACL_TCP_LISTEN; |
| 447 |
} else if (sock_type == SOCK_STREAM && strncmp(cp1, "accept ", 7) == 0) { |
| 448 |
operation = NETWORK_ACL_TCP_ACCEPT; |
| 449 |
} else { |
| 450 |
goto out; |
| 451 |
} |
| 452 |
if ((cp1 = strchr(cp2, ' ')) == NULL) goto out; *cp1++ = '\0'; |
| 453 |
if ((count = sscanf(cp2, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
| 454 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 455 |
&min_address[4], &min_address[5], &min_address[6], &min_address[7], |
| 456 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3], |
| 457 |
&max_address[4], &max_address[5], &max_address[6], &max_address[7])) == 8 || count == 16) { |
| 458 |
int i; |
| 459 |
for (i = 0; i < 8; i++) { |
| 460 |
min_address[i] = htons(min_address[i]); |
| 461 |
max_address[i] = htons(max_address[i]); |
| 462 |
} |
| 463 |
if (count == 8) memmove(max_address, min_address, sizeof(min_address)); |
| 464 |
record_type = IP_RECORD_TYPE_IPv6; |
| 465 |
} else if ((count = sscanf(cp2, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
| 466 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 467 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3])) == 4 || count == 8) { |
| 468 |
u32 ip = htonl((((u8) min_address[0]) << 24) + (((u8) min_address[1]) << 16) + (((u8) min_address[2]) << 8) + (u8) min_address[3]); |
| 469 |
* (u32 *) min_address = ip; |
| 470 |
if (count == 8) ip = htonl((((u8) max_address[0]) << 24) + (((u8) max_address[1]) << 16) + (((u8) max_address[2]) << 8) + (u8) max_address[3]); |
| 471 |
* (u32 *) max_address = ip; |
| 472 |
record_type = IP_RECORD_TYPE_IPv4; |
| 473 |
} else if (*cp2 == '@') { |
| 474 |
if ((group = FindOrAssignNewAddressGroup(cp2 + 1)) == NULL) return -ENOMEM; |
| 475 |
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
| 476 |
} else { |
| 477 |
goto out; |
| 478 |
} |
| 479 |
if (strchr(cp1, ' ')) goto out; |
| 480 |
if ((count = sscanf(cp1, "%hu-%hu", &min_port, &max_port)) == 1 || count == 2) { |
| 481 |
if (count == 1) max_port = min_port; |
| 482 |
return AddNetworkEntry(operation, record_type, group, (u32 *) min_address, (u32 *) max_address, min_port, max_port, domain, condition, is_delete); |
| 483 |
} |
| 484 |
out: ; |
| 485 |
return -EINVAL; |
| 486 |
} |
| 487 |
|
| 488 |
int CheckNetworkListenACL(const _Bool is_ipv6, const u8 *address, const u16 port) |
| 489 |
{ |
| 490 |
return CheckNetworkEntry(is_ipv6, NETWORK_ACL_TCP_LISTEN, (const u32 *) address, ntohs(port)); |
| 491 |
} |
| 492 |
EXPORT_SYMBOL(CheckNetworkListenACL); |
| 493 |
|
| 494 |
int CheckNetworkConnectACL(const _Bool is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 495 |
{ |
| 496 |
return CheckNetworkEntry(is_ipv6, sock_type == SOCK_STREAM ? NETWORK_ACL_TCP_CONNECT : (sock_type == SOCK_DGRAM ? NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT), (const u32 *) address, ntohs(port)); |
| 497 |
} |
| 498 |
EXPORT_SYMBOL(CheckNetworkConnectACL); |
| 499 |
|
| 500 |
int CheckNetworkBindACL(const _Bool is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 501 |
{ |
| 502 |
return CheckNetworkEntry(is_ipv6, sock_type == SOCK_STREAM ? NETWORK_ACL_TCP_BIND : (sock_type == SOCK_DGRAM ? NETWORK_ACL_UDP_BIND : NETWORK_ACL_RAW_BIND), (const u32 *) address, ntohs(port)); |
| 503 |
} |
| 504 |
EXPORT_SYMBOL(CheckNetworkBindACL); |
| 505 |
|
| 506 |
int CheckNetworkAcceptACL(const _Bool is_ipv6, const u8 *address, const u16 port) |
| 507 |
{ |
| 508 |
int retval; |
| 509 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
| 510 |
retval = CheckNetworkEntry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, (const u32 *) address, ntohs(port)); |
| 511 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
| 512 |
return retval; |
| 513 |
} |
| 514 |
EXPORT_SYMBOL(CheckNetworkAcceptACL); |
| 515 |
|
| 516 |
int CheckNetworkSendMsgACL(const _Bool is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 517 |
{ |
| 518 |
return CheckNetworkEntry(is_ipv6, sock_type == SOCK_DGRAM ? NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT, (const u32 *) address, ntohs(port)); |
| 519 |
} |
| 520 |
EXPORT_SYMBOL(CheckNetworkSendMsgACL); |
| 521 |
|
| 522 |
int CheckNetworkRecvMsgACL(const _Bool is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 523 |
{ |
| 524 |
int retval; |
| 525 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
| 526 |
retval = CheckNetworkEntry(is_ipv6, sock_type == SOCK_DGRAM ? NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT, (const u32 *) address, ntohs(port)); |
| 527 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
| 528 |
return retval; |
| 529 |
} |
| 530 |
EXPORT_SYMBOL(CheckNetworkRecvMsgACL); |
| 531 |
|
| 532 |
/***** TOMOYO Linux end. *****/ |
TOMOYO
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