| 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: 1.3.3 2007/04/01 |
| 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 |
/***** 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 semaphore domain_acl_lock; |
| 24 |
|
| 25 |
/************************* AUDIT FUNCTIONS *************************/ |
| 26 |
|
| 27 |
#ifdef CONFIG_TOMOYO_AUDIT |
| 28 |
static int AuditNetworkLog(const int is_ipv6, const char *operation, const u32 *address, const u16 port, const int is_granted) |
| 29 |
{ |
| 30 |
char *buf; |
| 31 |
int len = 256; |
| 32 |
if (CanSaveAuditLog(is_granted) < 0) return -ENOMEM; |
| 33 |
if ((buf = InitAuditLog(&len)) == NULL) return -ENOMEM; |
| 34 |
snprintf(buf + strlen(buf), len - strlen(buf) - 1, KEYWORD_ALLOW_NETWORK "%s ", operation); |
| 35 |
if (is_ipv6) { |
| 36 |
print_ipv6(buf + strlen(buf), len - strlen(buf), (const u16 *) address); |
| 37 |
} else { |
| 38 |
u32 ip = *address; |
| 39 |
snprintf(buf + strlen(buf), len - strlen(buf) - 1, "%u.%u.%u.%u", NIPQUAD(ip)); |
| 40 |
} |
| 41 |
snprintf(buf + strlen(buf), len - strlen(buf) - 1, " %u\n", port); |
| 42 |
return WriteAuditLog(buf, is_granted); |
| 43 |
} |
| 44 |
#else |
| 45 |
static inline void AuditNetworkLog(const int is_ipv6, const char *operation, const u32 *address, const u16 port, const int is_granted) {} |
| 46 |
#endif |
| 47 |
|
| 48 |
/************************* ADDRESS GROUP HANDLER *************************/ |
| 49 |
|
| 50 |
static ADDRESS_GROUP_ENTRY *group_list = NULL; |
| 51 |
|
| 52 |
static int AddAddressGroupEntry(const char *group_name, const u8 is_ipv6, const u16 *min_address, const u16 *max_address, const int is_delete) |
| 53 |
{ |
| 54 |
static DECLARE_MUTEX(lock); |
| 55 |
ADDRESS_GROUP_ENTRY *new_group, *group; |
| 56 |
ADDRESS_GROUP_MEMBER *new_member, *member; |
| 57 |
const struct path_info *saved_group_name; |
| 58 |
int error = -ENOMEM; |
| 59 |
if (!IsCorrectPath(group_name, 0, 0, 0, __FUNCTION__) || !group_name[0]) return -EINVAL; |
| 60 |
if ((saved_group_name = SaveName(group_name)) == NULL) return -ENOMEM; |
| 61 |
down(&lock); |
| 62 |
for (group = group_list; group; group = group->next) { |
| 63 |
if (saved_group_name != group->group_name) continue; |
| 64 |
for (member = group->first_member; member; member = member->next) { |
| 65 |
if (member->is_ipv6 != is_ipv6) continue; |
| 66 |
if (is_ipv6) { |
| 67 |
if (memcmp(member->min.ipv6, min_address, 16) || memcmp(member->max.ipv6, max_address, 16)) continue; |
| 68 |
} else { |
| 69 |
if (member->min.ipv4 != * (u32 *) min_address || member->max.ipv4 != * (u32 *) max_address) continue; |
| 70 |
} |
| 71 |
member->is_deleted = is_delete; |
| 72 |
error = 0; |
| 73 |
goto out; |
| 74 |
} |
| 75 |
break; |
| 76 |
} |
| 77 |
if (is_delete) { |
| 78 |
error = -ENOENT; |
| 79 |
goto out; |
| 80 |
} |
| 81 |
if (!group) { |
| 82 |
if ((new_group = (ADDRESS_GROUP_ENTRY *) alloc_element(sizeof(ADDRESS_GROUP_ENTRY))) == NULL) goto out; |
| 83 |
new_group->group_name = saved_group_name; |
| 84 |
mb(); /* Instead of using spinlock. */ |
| 85 |
if ((group = group_list) != NULL) { |
| 86 |
while (group->next) group = group->next; group->next = new_group; |
| 87 |
} else { |
| 88 |
group_list= new_group; |
| 89 |
} |
| 90 |
group = new_group; |
| 91 |
} |
| 92 |
if ((new_member = (ADDRESS_GROUP_MEMBER *) alloc_element(sizeof(ADDRESS_GROUP_MEMBER))) == NULL) goto out; |
| 93 |
new_member->is_ipv6 = is_ipv6; |
| 94 |
if (is_ipv6) { |
| 95 |
memmove(new_member->min.ipv6, min_address, 16); |
| 96 |
memmove(new_member->max.ipv6, max_address, 16); |
| 97 |
} else { |
| 98 |
new_member->min.ipv4 = * (u32 *) min_address; |
| 99 |
new_member->max.ipv4 = * (u32 *) max_address; |
| 100 |
} |
| 101 |
mb(); /* Instead of using spinlock. */ |
| 102 |
if ((member = group->first_member) != NULL) { |
| 103 |
while (member->next) member = member->next; member->next = new_member; |
| 104 |
} else { |
| 105 |
group->first_member = new_member; |
| 106 |
} |
| 107 |
error = 0; |
| 108 |
out: |
| 109 |
up(&lock); |
| 110 |
return error; |
| 111 |
} |
| 112 |
|
| 113 |
int AddAddressGroupPolicy(char *data, const int is_delete) |
| 114 |
{ |
| 115 |
int count, is_ipv6; |
| 116 |
u16 min_address[8], max_address[8]; |
| 117 |
char *cp = strchr(data, ' '); |
| 118 |
if (!cp) return -EINVAL; |
| 119 |
*cp++ = '\0'; |
| 120 |
if ((count = sscanf(cp, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
| 121 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 122 |
&min_address[4], &min_address[5], &min_address[6], &min_address[7], |
| 123 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3], |
| 124 |
&max_address[4], &max_address[5], &max_address[6], &max_address[7])) == 8 || count == 16) { |
| 125 |
int i; |
| 126 |
for (i = 0; i < 8; i++) { |
| 127 |
min_address[i] = htons(min_address[i]); |
| 128 |
max_address[i] = htons(max_address[i]); |
| 129 |
} |
| 130 |
if (count == 8) memmove(max_address, min_address, sizeof(min_address)); |
| 131 |
is_ipv6 = 1; |
| 132 |
} else if ((count = sscanf(cp, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
| 133 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 134 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3])) == 4 || count == 8) { |
| 135 |
u32 ip = ((((u8) min_address[0]) << 24) + (((u8) min_address[1]) << 16) + (((u8) min_address[2]) << 8) + (u8) min_address[3]); |
| 136 |
* (u32 *) min_address = ip; |
| 137 |
if (count == 8) ip = ((((u8) max_address[0]) << 24) + (((u8) max_address[1]) << 16) + (((u8) max_address[2]) << 8) + (u8) max_address[3]); |
| 138 |
* (u32 *) max_address = ip; |
| 139 |
is_ipv6 = 0; |
| 140 |
} else { |
| 141 |
return -EINVAL; |
| 142 |
} |
| 143 |
return AddAddressGroupEntry(data, is_ipv6, min_address, max_address, is_delete); |
| 144 |
} |
| 145 |
|
| 146 |
static ADDRESS_GROUP_ENTRY *FindOrAssignNewAddressGroup(const char *group_name) |
| 147 |
{ |
| 148 |
int i; |
| 149 |
ADDRESS_GROUP_ENTRY *group; |
| 150 |
for (i = 0; i <= 1; i++) { |
| 151 |
for (group = group_list; group; group = group->next) { |
| 152 |
if (strcmp(group_name, group->group_name->name) == 0) return group; |
| 153 |
} |
| 154 |
if (i == 0) { |
| 155 |
const u16 dummy[2] = { 0, 0 }; |
| 156 |
AddAddressGroupEntry(group_name, 0, dummy, dummy, 0); |
| 157 |
AddAddressGroupEntry(group_name, 0, dummy, dummy, 1); |
| 158 |
} |
| 159 |
} |
| 160 |
return NULL; |
| 161 |
} |
| 162 |
|
| 163 |
static int AddressMatchesToGroup(const u8 is_ipv6, const u32 *address, const ADDRESS_GROUP_ENTRY *group) |
| 164 |
{ |
| 165 |
ADDRESS_GROUP_MEMBER *member; |
| 166 |
const u32 ip = ntohl(*address); |
| 167 |
for (member = group->first_member; member; member = member->next) { |
| 168 |
if (member->is_deleted) continue; |
| 169 |
if (member->is_ipv6) { |
| 170 |
if (is_ipv6 && memcmp(member->min.ipv6, address, 16) <= 0 && memcmp(address, member->max.ipv6, 16) <= 0) return 1; |
| 171 |
} else { |
| 172 |
if (!is_ipv6 && member->min.ipv4 <= ip && ip <= member->max.ipv4) return 1; |
| 173 |
} |
| 174 |
} |
| 175 |
return 0; |
| 176 |
} |
| 177 |
|
| 178 |
int ReadAddressGroupPolicy(IO_BUFFER *head) |
| 179 |
{ |
| 180 |
ADDRESS_GROUP_ENTRY *group = (ADDRESS_GROUP_ENTRY *) head->read_var1; |
| 181 |
ADDRESS_GROUP_MEMBER *member = (ADDRESS_GROUP_MEMBER *) head->read_var2; |
| 182 |
if (!group) group = group_list; |
| 183 |
while (group) { |
| 184 |
head->read_var1 = (struct domain_info *) group; |
| 185 |
if (!member) member = group->first_member; |
| 186 |
while (member) { |
| 187 |
head->read_var2 = (void *) member; |
| 188 |
if (!member->is_deleted) { |
| 189 |
char buf[128]; |
| 190 |
if (member->is_ipv6) { |
| 191 |
const u16 *min_address = member->min.ipv6, *max_address = member->max.ipv6; |
| 192 |
print_ipv6(buf, sizeof(buf), min_address); |
| 193 |
if (memcmp(min_address, max_address, 16)) { |
| 194 |
char *cp = strchr(buf, '\0'); |
| 195 |
*cp++ = '-'; |
| 196 |
print_ipv6(cp, sizeof(buf) - strlen(buf), max_address); |
| 197 |
} |
| 198 |
} else { |
| 199 |
const u32 min_address = member->min.ipv4, max_address = member->max.ipv4; |
| 200 |
memset(buf, 0, sizeof(buf)); |
| 201 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(min_address)); |
| 202 |
if (min_address != max_address) { |
| 203 |
const int len = strlen(buf); |
| 204 |
snprintf(buf + len, sizeof(buf) - 1 - len, "-%u.%u.%u.%u", HIPQUAD(max_address)); |
| 205 |
} |
| 206 |
} |
| 207 |
if (io_printf(head, KEYWORD_ADDRESS_GROUP "%s %s\n", group->group_name->name, buf)) break; |
| 208 |
} |
| 209 |
member = member->next; |
| 210 |
} |
| 211 |
if (member) break; |
| 212 |
head->read_var2 = NULL; |
| 213 |
group = group->next; |
| 214 |
} |
| 215 |
return group ? -ENOMEM : 0; |
| 216 |
} |
| 217 |
|
| 218 |
/************************* NETWORK NETWORK ACL HANDLER *************************/ |
| 219 |
|
| 220 |
char *print_ipv6(char *buffer, const int buffer_len, const u16 *ip) |
| 221 |
{ |
| 222 |
memset(buffer, 0, buffer_len); |
| 223 |
snprintf(buffer, buffer_len - 1, "%x:%x:%x:%x:%x:%x:%x:%x", ntohs(ip[0]), ntohs(ip[1]), ntohs(ip[2]), ntohs(ip[3]), ntohs(ip[4]), ntohs(ip[5]), ntohs(ip[6]), ntohs(ip[7])); |
| 224 |
return buffer; |
| 225 |
} |
| 226 |
|
| 227 |
const char *network2keyword(const unsigned int operation) |
| 228 |
{ |
| 229 |
const char *keyword = "unknown"; |
| 230 |
switch (operation) { |
| 231 |
case NETWORK_ACL_UDP_BIND: |
| 232 |
keyword = "UDP bind"; |
| 233 |
break; |
| 234 |
case NETWORK_ACL_UDP_CONNECT: |
| 235 |
keyword = "UDP connect"; |
| 236 |
break; |
| 237 |
case NETWORK_ACL_TCP_BIND: |
| 238 |
keyword = "TCP bind"; |
| 239 |
break; |
| 240 |
case NETWORK_ACL_TCP_LISTEN: |
| 241 |
keyword = "TCP listen"; |
| 242 |
break; |
| 243 |
case NETWORK_ACL_TCP_CONNECT: |
| 244 |
keyword = "TCP connect"; |
| 245 |
break; |
| 246 |
case NETWORK_ACL_TCP_ACCEPT: |
| 247 |
keyword = "TCP accept"; |
| 248 |
break; |
| 249 |
case NETWORK_ACL_RAW_BIND: |
| 250 |
keyword = "RAW bind"; |
| 251 |
break; |
| 252 |
case NETWORK_ACL_RAW_CONNECT: |
| 253 |
keyword = "RAW connect"; |
| 254 |
break; |
| 255 |
} |
| 256 |
return keyword; |
| 257 |
} |
| 258 |
|
| 259 |
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 u8 is_add, const struct condition_list *condition) |
| 260 |
{ |
| 261 |
struct acl_info *ptr; |
| 262 |
int error = -ENOMEM; |
| 263 |
const u8 type = TYPE_IP_NETWORK_ACL; |
| 264 |
const u8 hash = operation; |
| 265 |
const u32 min_ip = ntohl(*min_address), max_ip = ntohl(*max_address); /* using host byte order to allow u32 comparison than memcmp().*/ |
| 266 |
if (!domain) return -EINVAL; |
| 267 |
down(&domain_acl_lock); |
| 268 |
if (is_add) { |
| 269 |
if ((ptr = domain->first_acl_ptr) == NULL) goto first_entry; |
| 270 |
while (1) { |
| 271 |
IP_NETWORK_ACL_RECORD *new_ptr; |
| 272 |
if (ptr->type == type && ptr->u.b[0] == hash && ptr->cond == condition && ((IP_NETWORK_ACL_RECORD *) ptr)->min_port == min_port && max_port == ((IP_NETWORK_ACL_RECORD *) ptr)->max_port) { |
| 273 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 274 |
if (((IP_NETWORK_ACL_RECORD *) ptr)->u.group == group) { |
| 275 |
ptr->is_deleted = 0; |
| 276 |
/* Found. Nothing to do. */ |
| 277 |
error = 0; |
| 278 |
break; |
| 279 |
} |
| 280 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
| 281 |
if (((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv4.min == min_ip && max_ip == ((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv4.max) { |
| 282 |
ptr->is_deleted = 0; |
| 283 |
/* Found. Nothing to do. */ |
| 284 |
error = 0; |
| 285 |
break; |
| 286 |
} |
| 287 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
| 288 |
if (memcmp(((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv6.min, min_address, 16) == 0 && memcmp(max_address, ((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv6.max, 16) == 0) { |
| 289 |
ptr->is_deleted = 0; |
| 290 |
/* Found. Nothing to do. */ |
| 291 |
error = 0; |
| 292 |
break; |
| 293 |
} |
| 294 |
} |
| 295 |
} |
| 296 |
if (ptr->next) { |
| 297 |
ptr = ptr->next; |
| 298 |
continue; |
| 299 |
} |
| 300 |
first_entry: ; |
| 301 |
if (is_add == 1 && TooManyDomainACL(domain)) break; |
| 302 |
/* Not found. Append it to the tail. */ |
| 303 |
if ((new_ptr = (IP_NETWORK_ACL_RECORD *) alloc_element(sizeof(IP_NETWORK_ACL_RECORD))) == NULL) break; |
| 304 |
new_ptr->head.type = type; |
| 305 |
new_ptr->head.u.b[0] = hash; |
| 306 |
new_ptr->head.u.b[1] = record_type; |
| 307 |
new_ptr->head.cond = condition; |
| 308 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 309 |
new_ptr->u.group = group; |
| 310 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
| 311 |
new_ptr->u.ipv4.min = min_ip; |
| 312 |
new_ptr->u.ipv4.max = max_ip; |
| 313 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
| 314 |
memmove(new_ptr->u.ipv6.min, min_address, 16); |
| 315 |
memmove(new_ptr->u.ipv6.max, max_address, 16); |
| 316 |
} |
| 317 |
new_ptr->min_port = min_port; |
| 318 |
new_ptr->max_port = max_port; |
| 319 |
error = AddDomainACL(ptr, domain, (struct acl_info *) new_ptr); |
| 320 |
break; |
| 321 |
} |
| 322 |
} else { |
| 323 |
error = -ENOENT; |
| 324 |
for (ptr = domain->first_acl_ptr; ptr; ptr = ptr->next) { |
| 325 |
if (ptr->type != type || ptr->is_deleted || ptr->u.b[0] != hash || ptr->u.b[1] != record_type || ptr->cond != condition || ((IP_NETWORK_ACL_RECORD *) ptr)->min_port != min_port || ((IP_NETWORK_ACL_RECORD *) ptr)->max_port != max_port) continue; |
| 326 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 327 |
if (((IP_NETWORK_ACL_RECORD *) ptr)->u.group != group) continue; |
| 328 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
| 329 |
if (((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv4.min != min_ip || max_ip != ((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv4.max) continue; |
| 330 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
| 331 |
if (memcmp(((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv6.min, min_address, 16) || memcmp(max_address, ((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv6.max, 16)) continue; |
| 332 |
} |
| 333 |
error = DelDomainACL(ptr); |
| 334 |
break; |
| 335 |
} |
| 336 |
} |
| 337 |
up(&domain_acl_lock); |
| 338 |
return error; |
| 339 |
} |
| 340 |
|
| 341 |
static int CheckNetworkEntry(const int is_ipv6, const int operation, const u32 *address, const u16 port) |
| 342 |
{ |
| 343 |
struct domain_info * const domain = current->domain_info; |
| 344 |
struct acl_info *ptr; |
| 345 |
const char *keyword = network2keyword(operation); |
| 346 |
const u8 type = TYPE_IP_NETWORK_ACL; |
| 347 |
const u8 hash = operation; |
| 348 |
const int is_enforce = CheckCCSEnforce(CCS_TOMOYO_MAC_FOR_NETWORK); |
| 349 |
const u32 ip = ntohl(*address); /* using host byte order to allow u32 comparison than memcmp().*/ |
| 350 |
if (!CheckCCSFlags(CCS_TOMOYO_MAC_FOR_NETWORK)) return 0; |
| 351 |
for (ptr = domain->first_acl_ptr; ptr; ptr = ptr->next) { |
| 352 |
if (ptr->type != type || ptr->is_deleted || ptr->u.b[0] != hash || port < ((IP_NETWORK_ACL_RECORD *) ptr)->min_port || ((IP_NETWORK_ACL_RECORD *) ptr)->max_port < port || CheckCondition(ptr->cond, NULL)) continue; |
| 353 |
if (ptr->u.b[1] == IP_RECORD_TYPE_ADDRESS_GROUP) { |
| 354 |
if (AddressMatchesToGroup(is_ipv6, address, ((IP_NETWORK_ACL_RECORD *) ptr)->u.group)) break; |
| 355 |
} else if (ptr->u.b[1] == IP_RECORD_TYPE_IPv4) { |
| 356 |
if (!is_ipv6 && ((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv4.min <= ip && ip <= ((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv4.max) break; |
| 357 |
} else { |
| 358 |
if (is_ipv6 && memcmp(((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv6.min, address, 16) <= 0 && memcmp(address, ((IP_NETWORK_ACL_RECORD *) ptr)->u.ipv6.max, 16) <= 0) break; |
| 359 |
} |
| 360 |
} |
| 361 |
if (ptr) { |
| 362 |
AuditNetworkLog(is_ipv6, keyword, address, port, 1); |
| 363 |
return 0; |
| 364 |
} |
| 365 |
if (TomoyoVerboseMode()) { |
| 366 |
if (is_ipv6) { |
| 367 |
char buf[64]; |
| 368 |
print_ipv6(buf, sizeof(buf), (const u16 *) address); |
| 369 |
printk("TOMOYO-%s: %s to %s %u denied for %s\n", GetMSG(is_enforce), keyword, buf, port, GetLastName(domain)); |
| 370 |
} else { |
| 371 |
printk("TOMOYO-%s: %s to %u.%u.%u.%u %u denied for %s\n", GetMSG(is_enforce), keyword, HIPQUAD(ip), port, GetLastName(domain)); |
| 372 |
} |
| 373 |
} |
| 374 |
AuditNetworkLog(is_ipv6, keyword, address, port, 0); |
| 375 |
if (is_enforce) { |
| 376 |
if (is_ipv6) { |
| 377 |
char buf[64]; |
| 378 |
print_ipv6(buf, sizeof(buf), (const u16 *) address); |
| 379 |
return CheckSupervisor("%s\n" KEYWORD_ALLOW_NETWORK "%s %s %u\n", domain->domainname->name, keyword, buf, port); |
| 380 |
} |
| 381 |
return CheckSupervisor("%s\n" KEYWORD_ALLOW_NETWORK "%s %u.%u.%u.%u %u\n", domain->domainname->name, keyword, HIPQUAD(ip), port); |
| 382 |
} |
| 383 |
if (CheckCCSAccept(CCS_TOMOYO_MAC_FOR_NETWORK)) AddNetworkEntry(operation, is_ipv6 ? IP_RECORD_TYPE_IPv6: IP_RECORD_TYPE_IPv4, NULL, address, address, port, port, domain, 1, NULL); |
| 384 |
return 0; |
| 385 |
} |
| 386 |
|
| 387 |
int AddNetworkPolicy(char *data, struct domain_info *domain, const int is_delete) |
| 388 |
{ |
| 389 |
u8 sock_type, operation, record_type; |
| 390 |
u16 min_address[8], max_address[8]; |
| 391 |
struct address_group_entry *group = NULL; |
| 392 |
u16 min_port, max_port; |
| 393 |
int count; |
| 394 |
char *cp1 = NULL, *cp2 = NULL; |
| 395 |
const struct condition_list *condition = NULL; |
| 396 |
cp1 = FindConditionPart(data); |
| 397 |
if (cp1 && (condition = FindOrAssignNewCondition(cp1)) == NULL) goto out; |
| 398 |
if ((cp1 = strchr(data, ' ')) == NULL) goto out; cp1++; |
| 399 |
if (strncmp(data, "TCP ", 4) == 0) sock_type = SOCK_STREAM; |
| 400 |
else if (strncmp(data, "UDP ", 4) == 0) sock_type = SOCK_DGRAM; |
| 401 |
else if (strncmp(data, "RAW ", 4) == 0) sock_type = SOCK_RAW; |
| 402 |
else goto out; |
| 403 |
if ((cp2 = strchr(cp1, ' ')) == NULL) goto out; cp2++; |
| 404 |
if (strncmp(cp1, "bind ", 5) == 0) { |
| 405 |
operation = (sock_type == SOCK_STREAM) ? NETWORK_ACL_TCP_BIND : (sock_type == SOCK_DGRAM) ? NETWORK_ACL_UDP_BIND : NETWORK_ACL_RAW_BIND; |
| 406 |
} else if (strncmp(cp1, "connect ", 8) == 0) { |
| 407 |
operation = (sock_type == SOCK_STREAM) ? NETWORK_ACL_TCP_CONNECT : (sock_type == SOCK_DGRAM) ? NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
| 408 |
} else if (sock_type == SOCK_STREAM && strncmp(cp1, "listen ", 7) == 0) { |
| 409 |
operation = NETWORK_ACL_TCP_LISTEN; |
| 410 |
} else if (sock_type == SOCK_STREAM && strncmp(cp1, "accept ", 7) == 0) { |
| 411 |
operation = NETWORK_ACL_TCP_ACCEPT; |
| 412 |
} else { |
| 413 |
goto out; |
| 414 |
} |
| 415 |
if ((cp1 = strchr(cp2, ' ')) == NULL) goto out; *cp1++ = '\0'; |
| 416 |
if ((count = sscanf(cp2, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
| 417 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 418 |
&min_address[4], &min_address[5], &min_address[6], &min_address[7], |
| 419 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3], |
| 420 |
&max_address[4], &max_address[5], &max_address[6], &max_address[7])) == 8 || count == 16) { |
| 421 |
int i; |
| 422 |
for (i = 0; i < 8; i++) { |
| 423 |
min_address[i] = htons(min_address[i]); |
| 424 |
max_address[i] = htons(max_address[i]); |
| 425 |
} |
| 426 |
if (count == 8) memmove(max_address, min_address, sizeof(min_address)); |
| 427 |
record_type = IP_RECORD_TYPE_IPv6; |
| 428 |
} else if ((count = sscanf(cp2, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
| 429 |
&min_address[0], &min_address[1], &min_address[2], &min_address[3], |
| 430 |
&max_address[0], &max_address[1], &max_address[2], &max_address[3])) == 4 || count == 8) { |
| 431 |
u32 ip = htonl((((u8) min_address[0]) << 24) + (((u8) min_address[1]) << 16) + (((u8) min_address[2]) << 8) + (u8) min_address[3]); |
| 432 |
* (u32 *) min_address = ip; |
| 433 |
if (count == 8) ip = htonl((((u8) max_address[0]) << 24) + (((u8) max_address[1]) << 16) + (((u8) max_address[2]) << 8) + (u8) max_address[3]); |
| 434 |
* (u32 *) max_address = ip; |
| 435 |
record_type = IP_RECORD_TYPE_IPv4; |
| 436 |
} else if (*cp2 == '@') { |
| 437 |
if ((group = FindOrAssignNewAddressGroup(cp2 + 1)) == NULL) return -ENOMEM; |
| 438 |
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
| 439 |
} else { |
| 440 |
goto out; |
| 441 |
} |
| 442 |
if (strchr(cp1, ' ')) goto out; |
| 443 |
if ((count = sscanf(cp1, "%hu-%hu", &min_port, &max_port)) == 1 || count == 2) { |
| 444 |
if (count == 1) max_port = min_port; |
| 445 |
return AddNetworkEntry(operation, record_type, group, (u32 *) min_address, (u32 *) max_address, min_port, max_port, domain, is_delete ? 0 : -1, condition); |
| 446 |
} |
| 447 |
out: ; |
| 448 |
return -EINVAL; |
| 449 |
} |
| 450 |
|
| 451 |
int CheckNetworkListenACL(const int is_ipv6, const u8 *address, const u16 port) |
| 452 |
{ |
| 453 |
return CheckNetworkEntry(is_ipv6, NETWORK_ACL_TCP_LISTEN, (const u32 *) address, ntohs(port)); |
| 454 |
} |
| 455 |
|
| 456 |
int CheckNetworkConnectACL(const int is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 457 |
{ |
| 458 |
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)); |
| 459 |
} |
| 460 |
|
| 461 |
int CheckNetworkBindACL(const int is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 462 |
{ |
| 463 |
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)); |
| 464 |
} |
| 465 |
|
| 466 |
int CheckNetworkAcceptACL(const int is_ipv6, const u8 *address, const u16 port) |
| 467 |
{ |
| 468 |
return CheckNetworkEntry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, (const u32 *) address, ntohs(port)); |
| 469 |
} |
| 470 |
|
| 471 |
int CheckNetworkSendMsgACL(const int is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 472 |
{ |
| 473 |
return CheckNetworkEntry(is_ipv6, sock_type == SOCK_DGRAM ? NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT, (const u32 *) address, ntohs(port)); |
| 474 |
} |
| 475 |
|
| 476 |
int CheckNetworkRecvMsgACL(const int is_ipv6, const int sock_type, const u8 *address, const u16 port) |
| 477 |
{ |
| 478 |
return CheckNetworkEntry(is_ipv6, sock_type == SOCK_DGRAM ? NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT, (const u32 *) address, ntohs(port)); |
| 479 |
} |
| 480 |
|
| 481 |
EXPORT_SYMBOL(CheckNetworkListenACL); |
| 482 |
EXPORT_SYMBOL(CheckNetworkConnectACL); |
| 483 |
EXPORT_SYMBOL(CheckNetworkBindACL); |
| 484 |
EXPORT_SYMBOL(CheckNetworkAcceptACL); |
| 485 |
EXPORT_SYMBOL(CheckNetworkSendMsgACL); |
| 486 |
EXPORT_SYMBOL(CheckNetworkRecvMsgACL); |
| 487 |
|
| 488 |
/***** TOMOYO Linux end. *****/ |
TOMOYO
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